X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/1c79356b52d46aa6b508fb032f5ae709b1f2897b..ff6e181ae92fc6f1e89841290f461d1f2f9badd9:/bsd/netkey/key.c?ds=sidebyside diff --git a/bsd/netkey/key.c b/bsd/netkey/key.c index 9db82dcfd..2c635da4c 100644 --- a/bsd/netkey/key.c +++ b/bsd/netkey/key.c @@ -1,4 +1,5 @@ -/* $KAME: key.c,v 1.76 2000/03/27 05:11:04 sumikawa Exp $ */ +/* $FreeBSD: src/sys/netkey/key.c,v 1.16.2.13 2002/07/24 18:17:40 ume Exp $ */ +/* $KAME: key.c,v 1.191 2001/06/27 10:46:49 sakane Exp $ */ /* * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. @@ -33,17 +34,6 @@ * This code is referd to RFC 2367 */ -#if (defined(__FreeBSD__) && __FreeBSD__ >= 3) || defined(__NetBSD__) -#include "opt_inet.h" -#ifdef __NetBSD__ -#include "opt_ipsec.h" -#endif -#endif - -/* this is for backward compatibility. we should not touch those. */ -#define ss_len __ss_len -#define ss_family __ss_family - #include #include #include @@ -54,12 +44,13 @@ #include #include #include -#if defined(__FreeBSD__) || defined (__APPLE__) #include -#endif #include #include #include +#include + +#include #include #include @@ -80,9 +71,7 @@ #include #endif #if INET6 -#if !(defined(__bsdi__) && _BSDI_VERSION >= 199802) #include -#endif #endif /* INET6 */ #include @@ -90,16 +79,46 @@ #include #include #include +#include + #include +#if INET6 +#include +#endif #include +#if INET6 +#include +#endif #if IPSEC_ESP #include +#if INET6 +#include +#endif #endif #include +#if INET6 +#include +#endif + + +/* randomness */ +#include #include +#ifndef satosin +#define satosin(s) ((struct sockaddr_in *)s) +#endif + +#define FULLMASK 0xff + +lck_grp_t *sadb_mutex_grp; +lck_grp_attr_t *sadb_mutex_grp_attr; +lck_attr_t *sadb_mutex_attr; +lck_mtx_t *sadb_mutex; +extern lck_mtx_t *nd6_mutex; + /* * Note on SA reference counting: * - SAs that are not in DEAD state will have (total external reference + 1) @@ -120,14 +139,22 @@ static u_int key_int_random = 60; /*interval to initialize randseed,1(m)*/ static u_int key_larval_lifetime = 30; /* interval to expire acquiring, 30(s)*/ static int key_blockacq_count = 10; /* counter for blocking SADB_ACQUIRE.*/ static int key_blockacq_lifetime = 20; /* lifetime for blocking SADB_ACQUIRE.*/ +static int key_preferred_oldsa = 0; /* preferred old sa rather than new sa.*/ +static int natt_keepalive_interval = 20; /* interval between natt keepalives.*/ static u_int32_t acq_seq = 0; static int key_tick_init_random = 0; +__private_extern__ u_int32_t natt_now = 0; static LIST_HEAD(_sptree, secpolicy) sptree[IPSEC_DIR_MAX]; /* SPD */ static LIST_HEAD(_sahtree, secashead) sahtree; /* SAD */ static LIST_HEAD(_regtree, secreg) regtree[SADB_SATYPE_MAX + 1]; /* registed list */ + +#define SPIHASHSIZE 128 +#define SPIHASH(x) (((x) ^ ((x) >> 16)) % SPIHASHSIZE) +static LIST_HEAD(_spihash, secasvar) spihash[SPIHASHSIZE]; + #ifndef IPSEC_NONBLOCK_ACQUIRE static LIST_HEAD(_acqtree, secacq) acqtree; /* acquiring list */ #endif @@ -136,28 +163,75 @@ static LIST_HEAD(_spacqtree, secspacq) spacqtree; /* SP acquiring list */ struct key_cb key_cb; /* search order for SAs */ -static u_int saorder_state_valid[] = { +static const u_int saorder_state_valid_prefer_old[] = { SADB_SASTATE_DYING, SADB_SASTATE_MATURE, - /* - * This order is important because we must select a oldest SA - * for outbound processing. For inbound, This is not important. - */ }; -static u_int saorder_state_alive[] = { +static const u_int saorder_state_valid_prefer_new[] = { + SADB_SASTATE_MATURE, SADB_SASTATE_DYING, +}; +static const u_int saorder_state_alive[] = { /* except DEAD */ SADB_SASTATE_MATURE, SADB_SASTATE_DYING, SADB_SASTATE_LARVAL }; -static u_int saorder_state_any[] = { +static const u_int saorder_state_any[] = { SADB_SASTATE_MATURE, SADB_SASTATE_DYING, SADB_SASTATE_LARVAL, SADB_SASTATE_DEAD }; -#if defined(__FreeBSD__) || defined (__APPLE__) +static const int minsize[] = { + sizeof(struct sadb_msg), /* SADB_EXT_RESERVED */ + sizeof(struct sadb_sa), /* SADB_EXT_SA */ + sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_CURRENT */ + sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_HARD */ + sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_SOFT */ + sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_SRC */ + sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_DST */ + sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_PROXY */ + sizeof(struct sadb_key), /* SADB_EXT_KEY_AUTH */ + sizeof(struct sadb_key), /* SADB_EXT_KEY_ENCRYPT */ + sizeof(struct sadb_ident), /* SADB_EXT_IDENTITY_SRC */ + sizeof(struct sadb_ident), /* SADB_EXT_IDENTITY_DST */ + sizeof(struct sadb_sens), /* SADB_EXT_SENSITIVITY */ + sizeof(struct sadb_prop), /* SADB_EXT_PROPOSAL */ + sizeof(struct sadb_supported), /* SADB_EXT_SUPPORTED_AUTH */ + sizeof(struct sadb_supported), /* SADB_EXT_SUPPORTED_ENCRYPT */ + sizeof(struct sadb_spirange), /* SADB_EXT_SPIRANGE */ + 0, /* SADB_X_EXT_KMPRIVATE */ + sizeof(struct sadb_x_policy), /* SADB_X_EXT_POLICY */ + sizeof(struct sadb_x_sa2), /* SADB_X_SA2 */ +}; +static const int maxsize[] = { + sizeof(struct sadb_msg), /* SADB_EXT_RESERVED */ + sizeof(struct sadb_sa_2), /* SADB_EXT_SA */ + sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_CURRENT */ + sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_HARD */ + sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_SOFT */ + 0, /* SADB_EXT_ADDRESS_SRC */ + 0, /* SADB_EXT_ADDRESS_DST */ + 0, /* SADB_EXT_ADDRESS_PROXY */ + 0, /* SADB_EXT_KEY_AUTH */ + 0, /* SADB_EXT_KEY_ENCRYPT */ + 0, /* SADB_EXT_IDENTITY_SRC */ + 0, /* SADB_EXT_IDENTITY_DST */ + 0, /* SADB_EXT_SENSITIVITY */ + 0, /* SADB_EXT_PROPOSAL */ + 0, /* SADB_EXT_SUPPORTED_AUTH */ + 0, /* SADB_EXT_SUPPORTED_ENCRYPT */ + sizeof(struct sadb_spirange), /* SADB_EXT_SPIRANGE */ + 0, /* SADB_X_EXT_KMPRIVATE */ + 0, /* SADB_X_EXT_POLICY */ + sizeof(struct sadb_x_sa2), /* SADB_X_SA2 */ +}; + +static int ipsec_esp_keymin = 256; +static int ipsec_esp_auth = 0; +static int ipsec_ah_keymin = 128; + SYSCTL_DECL(_net_key); -//#if defined(IPSEC_DEBUG) + SYSCTL_INT(_net_key, KEYCTL_DEBUG_LEVEL, debug, CTLFLAG_RW, \ &key_debug_level, 0, ""); -//#endif /* defined(IPSEC_DEBUG) */ + /* max count of trial for the decision of spi value */ SYSCTL_INT(_net_key, KEYCTL_SPI_TRY, spi_trycnt, CTLFLAG_RW, \ @@ -187,7 +261,29 @@ SYSCTL_INT(_net_key, KEYCTL_BLOCKACQ_COUNT, blockacq_count, CTLFLAG_RW, \ SYSCTL_INT(_net_key, KEYCTL_BLOCKACQ_LIFETIME, blockacq_lifetime, CTLFLAG_RW, \ &key_blockacq_lifetime, 0, ""); -#endif /* __FreeBSD__ */ +/* ESP auth */ +SYSCTL_INT(_net_key, KEYCTL_ESP_AUTH, esp_auth, CTLFLAG_RW, \ + &ipsec_esp_auth, 0, ""); + +/* minimum ESP key length */ +SYSCTL_INT(_net_key, KEYCTL_ESP_KEYMIN, esp_keymin, CTLFLAG_RW, \ + &ipsec_esp_keymin, 0, ""); + +/* minimum AH key length */ +SYSCTL_INT(_net_key, KEYCTL_AH_KEYMIN, ah_keymin, CTLFLAG_RW, \ + &ipsec_ah_keymin, 0, ""); + +/* perfered old SA rather than new SA */ +SYSCTL_INT(_net_key, KEYCTL_PREFERED_OLDSA, prefered_oldsa, CTLFLAG_RW,\ + &key_preferred_oldsa, 0, ""); + +/* time between NATT keepalives in seconds, 0 disabled */ +SYSCTL_INT(_net_key, KEYCTL_NATT_KEEPALIVE_INTERVAL, natt_keepalive_interval, CTLFLAG_RW,\ + &natt_keepalive_interval, 0, ""); + +/* PF_KEY statistics */ +SYSCTL_STRUCT(_net_key, KEYCTL_PFKEYSTAT, pfkeystat, CTLFLAG_RD,\ + &pfkeystat, pfkeystat, ""); #ifndef LIST_FOREACH #define LIST_FOREACH(elm, head, field) \ @@ -209,20 +305,20 @@ do {\ #define KEY_CHKSASTATE(head, sav, name) \ do { \ - if ((head) != (sav)) { \ - printf("%s: state mismatched (TREE=%d SA=%d)\n", \ - (name), (head), (sav)); \ - continue; \ - } \ + if ((head) != (sav)) { \ + ipseclog((LOG_DEBUG, "%s: state mismatched (TREE=%d SA=%d)\n", \ + (name), (head), (sav))); \ + continue; \ + } \ } while (0) #define KEY_CHKSPDIR(head, sp, name) \ do { \ - if ((head) != (sp)) { \ - printf("%s: direction mismatched (TREE=%d SP=%d), " \ - "anyway continue.\n", \ - (name), (head), (sp)); \ - } \ + if ((head) != (sp)) { \ + ipseclog((LOG_DEBUG, "%s: direction mismatched (TREE=%d SP=%d), " \ + "anyway continue.\n", \ + (name), (head), (sp))); \ + } \ } while (0) #if 1 @@ -264,12 +360,12 @@ do { \ * set parameters into secasindex buffer. * Must allocate secasindex buffer before calling this function. */ -#define KEY_SETSECASIDX(p, m, s, d, idx) \ +#define KEY_SETSECASIDX(p, m, r, s, d, idx) \ do { \ bzero((idx), sizeof(struct secasindex)); \ (idx)->proto = (p); \ - (idx)->mode = (m)->sadb_msg_mode; \ - (idx)->reqid = (m)->sadb_msg_reqid; \ + (idx)->mode = (m); \ + (idx)->reqid = (r); \ bcopy((s), &(idx)->src, ((struct sockaddr *)(s))->sa_len); \ bcopy((d), &(idx)->dst, ((struct sockaddr *)(d))->sa_len); \ } while (0) @@ -279,115 +375,170 @@ struct _keystat { u_long getspi_count; /* the avarage of count to try to get new SPI */ } keystat; -static struct secasvar *key_allocsa_policy __P((struct secasindex *saidx)); -static void key_freesp_so __P((struct secpolicy **sp)); -static struct secasvar *key_do_allocsa_policy __P((struct secashead *sah, - u_int state)); -static void key_delsp __P((struct secpolicy *sp)); -static struct secpolicy *key_getsp __P((struct secpolicyindex *spidx)); -static struct secpolicy *key_getspbyid __P((u_int32_t id)); -static u_int32_t key_newreqid __P((void)); -static struct sadb_msg *key_spdadd __P((caddr_t *mhp)); -static u_int32_t key_getnewspid __P((void)); -static struct sadb_msg *key_spddelete __P((caddr_t *mhp)); -static struct sadb_msg *key_spddelete2 __P((caddr_t *mhp)); -static int key_spdget __P((caddr_t *mhp, struct socket *so, int target)); -static struct sadb_msg *key_spdflush __P((caddr_t *mhp)); -static int key_spddump __P((caddr_t *mhp, struct socket *so, int target)); -static struct mbuf *key_setdumpsp __P((struct secpolicy *sp, - u_int8_t type, u_int32_t seq, u_int32_t pid)); -static u_int key_getspmsglen __P((struct secpolicy *sp)); -static u_int key_getspreqmsglen __P((struct secpolicy *sp)); -static struct secashead *key_newsah __P((struct secasindex *saidx)); -static void key_delsah __P((struct secashead *sah)); -static struct secasvar *key_newsav __P((caddr_t *mhp, struct secashead *sah)); -static void key_delsav __P((struct secasvar *sav)); -static struct secashead *key_getsah __P((struct secasindex *saidx)); -static struct secasvar *key_checkspidup __P((struct secasindex *saidx, - u_int32_t spi)); -static struct secasvar *key_getsavbyspi __P((struct secashead *sah, - u_int32_t spi)); -static int key_setsaval __P((struct secasvar *sav, caddr_t *mhp)); -static u_int key_getmsglen __P((struct secasvar *sav)); -static int key_mature __P((struct secasvar *sav)); -static u_int key_setdumpsa __P((struct sadb_msg *newmsg, struct secasvar *sav, - u_int8_t type, u_int8_t satype, - u_int32_t seq, u_int32_t pid)); -#if 1 -static int key_setsadbmsg_m __P((struct mbuf *, u_int8_t type, int tlen, - u_int8_t satype, u_int32_t seq, pid_t pid, - u_int8_t mode, u_int32_t reqid, - u_int8_t reserved1, u_int32_t reserved2)); -#endif -static caddr_t key_setsadbmsg __P((caddr_t buf, u_int8_t type, int tlen, - u_int8_t satype, u_int32_t seq, pid_t pid, - u_int8_t mode, u_int32_t reqid, - u_int8_t reserved1, u_int32_t reserved2)); -static caddr_t key_setsadbsa __P((caddr_t buf, struct secasvar *sav)); -#if 1 -static int key_setsadbaddr_m __P((struct mbuf *m, u_int16_t exttype, - struct sockaddr *saddr, u_int8_t prefixlen, u_int16_t ul_proto)); +struct sadb_msghdr { + struct sadb_msg *msg; + struct sadb_ext *ext[SADB_EXT_MAX + 1]; + int extoff[SADB_EXT_MAX + 1]; + int extlen[SADB_EXT_MAX + 1]; +}; + +static struct secasvar *key_allocsa_policy(struct secasindex *); +static void key_freesp_so(struct secpolicy **); +static struct secasvar *key_do_allocsa_policy(struct secashead *, u_int); +static void key_delsp(struct secpolicy *); +static struct secpolicy *key_getsp(struct secpolicyindex *); +static struct secpolicy *key_getspbyid(u_int32_t); +static u_int32_t key_newreqid(void); +static struct mbuf *key_gather_mbuf(struct mbuf *, + const struct sadb_msghdr *, int, int, int *); +static int key_spdadd(struct socket *, struct mbuf *, + const struct sadb_msghdr *); +static u_int32_t key_getnewspid(void); +static int key_spddelete(struct socket *, struct mbuf *, + const struct sadb_msghdr *); +static int key_spddelete2(struct socket *, struct mbuf *, + const struct sadb_msghdr *); +static int key_spdget(struct socket *, struct mbuf *, + const struct sadb_msghdr *); +static int key_spdflush(struct socket *, struct mbuf *, + const struct sadb_msghdr *); +static int key_spddump(struct socket *, struct mbuf *, + const struct sadb_msghdr *); +static struct mbuf *key_setdumpsp(struct secpolicy *, + u_int8_t, u_int32_t, u_int32_t); +static u_int key_getspreqmsglen(struct secpolicy *); +static int key_spdexpire(struct secpolicy *); +static struct secashead *key_newsah(struct secasindex *); +static void key_delsah(struct secashead *); +static struct secasvar *key_newsav(struct mbuf *, + const struct sadb_msghdr *, struct secashead *, int *); +static void key_delsav(struct secasvar *); +static struct secashead *key_getsah(struct secasindex *); +static struct secasvar *key_checkspidup(struct secasindex *, u_int32_t); +static void key_setspi __P((struct secasvar *, u_int32_t)); +static struct secasvar *key_getsavbyspi(struct secashead *, u_int32_t); +static int key_setsaval(struct secasvar *, struct mbuf *, + const struct sadb_msghdr *); +static int key_mature(struct secasvar *); +static struct mbuf *key_setdumpsa(struct secasvar *, u_int8_t, + u_int8_t, u_int32_t, u_int32_t); +static struct mbuf *key_setsadbmsg(u_int8_t, u_int16_t, u_int8_t, + u_int32_t, pid_t, u_int16_t); +static struct mbuf *key_setsadbsa(struct secasvar *); +static struct mbuf *key_setsadbaddr(u_int16_t, + struct sockaddr *, u_int8_t, u_int16_t); +#if 0 +static struct mbuf *key_setsadbident(u_int16_t, u_int16_t, caddr_t, + int, u_int64_t); #endif -static caddr_t key_setsadbaddr __P((caddr_t buf, u_int16_t exttype, - struct sockaddr *saddr, u_int8_t prefixlen, u_int16_t ul_proto)); -static caddr_t key_setsadbident - __P((caddr_t buf, u_int16_t exttype, u_int16_t idtype, - caddr_t string, int stringlen, u_int64_t id)); -static caddr_t key_setsadbxpolicy - __P((caddr_t buf, u_int16_t type, u_int8_t dir, u_int32_t id)); -static caddr_t key_setsadbext __P((caddr_t p, caddr_t ext)); -static void *key_newbuf __P((void *src, u_int len)); +static struct mbuf *key_setsadbxsa2(u_int8_t, u_int32_t, u_int32_t); +static struct mbuf *key_setsadbxpolicy(u_int16_t, u_int8_t, + u_int32_t); +static void *key_newbuf(const void *, u_int); #if INET6 -static int key_ismyaddr6 __P((caddr_t addr)); -#endif -#if 0 -static int key_isloopback __P((u_int family, caddr_t addr)); +static int key_ismyaddr6(struct sockaddr_in6 *); +#endif + +/* flags for key_cmpsaidx() */ +#define CMP_HEAD 1 /* protocol, addresses. */ +#define CMP_MODE_REQID 2 /* additionally HEAD, reqid, mode. */ +#define CMP_REQID 3 /* additionally HEAD, reaid. */ +#define CMP_EXACTLY 4 /* all elements. */ +static int key_cmpsaidx(struct secasindex *, struct secasindex *, int); + +static int key_cmpspidx_exactly(struct secpolicyindex *, + struct secpolicyindex *); +static int key_cmpspidx_withmask(struct secpolicyindex *, + struct secpolicyindex *); +static int key_sockaddrcmp(struct sockaddr *, struct sockaddr *, int); +static int key_bbcmp(caddr_t, caddr_t, u_int); +static void key_srandom(void); +static u_int16_t key_satype2proto(u_int8_t); +static u_int8_t key_proto2satype(u_int16_t); + +static int key_getspi(struct socket *, struct mbuf *, + const struct sadb_msghdr *); +static u_int32_t key_do_getnewspi(struct sadb_spirange *, struct secasindex *); +static int key_update(struct socket *, struct mbuf *, + const struct sadb_msghdr *); +#if IPSEC_DOSEQCHECK +static struct secasvar *key_getsavbyseq(struct secashead *, u_int32_t); #endif -static int key_cmpsaidx_exactly - __P((struct secasindex *saidx0, struct secasindex *saidx1)); -static int key_cmpsaidx_withmode - __P((struct secasindex *saidx0, struct secasindex *saidx1)); -static int key_cmpspidx_exactly - __P((struct secpolicyindex *spidx0, struct secpolicyindex *spidx1)); -static int key_cmpspidx_withmask - __P((struct secpolicyindex *spidx0, struct secpolicyindex *spidx1)); -static int key_bbcmp __P((caddr_t p1, caddr_t p2, u_int bits)); -static u_int16_t key_satype2proto __P((u_int8_t satype)); -static u_int8_t key_proto2satype __P((u_int16_t proto)); - -static struct sadb_msg *key_getspi __P((caddr_t *mhp)); -static u_int32_t key_do_getnewspi __P((struct sadb_spirange *spirange, - struct secasindex *saidx)); -static struct sadb_msg *key_update __P((caddr_t *mhp)); -#ifdef IPSEC_DOSEQCHECK -static struct secasvar *key_getsavbyseq __P((struct secashead *sah, - u_int32_t seq)); +static int key_add(struct socket *, struct mbuf *, const struct sadb_msghdr *); +static int key_setident(struct secashead *, struct mbuf *, + const struct sadb_msghdr *); +static struct mbuf *key_getmsgbuf_x1(struct mbuf *, const struct sadb_msghdr *); +static int key_delete(struct socket *, struct mbuf *, + const struct sadb_msghdr *); +static int key_get(struct socket *, struct mbuf *, const struct sadb_msghdr *); + +static void key_getcomb_setlifetime(struct sadb_comb *); +#if IPSEC_ESP +static struct mbuf *key_getcomb_esp(void); #endif -static struct sadb_msg *key_add __P((caddr_t *mhp)); -static int key_setident __P((struct secashead *sah, caddr_t *mhp)); -static struct sadb_msg *key_getmsgbuf_x1 __P((caddr_t *mhp)); -static struct sadb_msg *key_delete __P((caddr_t *mhp)); -static struct sadb_msg *key_get __P((caddr_t *mhp)); -static int key_acquire __P((struct secasindex *, struct secpolicy *)); -static struct secacq *key_newacq __P((struct secasindex *saidx)); -static struct secacq *key_getacq __P((struct secasindex *saidx)); -static struct secacq *key_getacqbyseq __P((u_int32_t seq)); -static struct secspacq *key_newspacq __P((struct secpolicyindex *spidx)); -static struct secspacq *key_getspacq __P((struct secpolicyindex *spidx)); -static struct sadb_msg *key_acquire2 __P((caddr_t *mhp)); -static struct sadb_msg *key_register __P((caddr_t *mhp, struct socket *so)); -static int key_expire __P((struct secasvar *sav)); -static struct sadb_msg *key_flush __P((caddr_t *mhp)); -static int key_dump __P((caddr_t *mhp, struct socket *so, int target)); -static void key_promisc __P((caddr_t *mhp, struct socket *so)); -static int key_sendall __P((struct sadb_msg *msg, u_int len)); -static int key_align __P((struct sadb_msg *msg, caddr_t *mhp)); +static struct mbuf *key_getcomb_ah(void); +static struct mbuf *key_getcomb_ipcomp(void); +static struct mbuf *key_getprop(const struct secasindex *); + +static int key_acquire(struct secasindex *, struct secpolicy *); +#ifndef IPSEC_NONBLOCK_ACQUIRE +static struct secacq *key_newacq(struct secasindex *); +static struct secacq *key_getacq(struct secasindex *); +static struct secacq *key_getacqbyseq(u_int32_t); +#endif +static struct secspacq *key_newspacq(struct secpolicyindex *); +static struct secspacq *key_getspacq(struct secpolicyindex *); +static int key_acquire2(struct socket *, struct mbuf *, + const struct sadb_msghdr *); +static int key_register(struct socket *, struct mbuf *, + const struct sadb_msghdr *); +static int key_expire(struct secasvar *); +static int key_flush(struct socket *, struct mbuf *, + const struct sadb_msghdr *); +static int key_dump(struct socket *, struct mbuf *, const struct sadb_msghdr *); +static int key_promisc(struct socket *, struct mbuf *, + const struct sadb_msghdr *); +static int key_senderror(struct socket *, struct mbuf *, int); +static int key_validate_ext(const struct sadb_ext *, int); +static int key_align(struct mbuf *, struct sadb_msghdr *); #if 0 -static const char *key_getfqdn __P((void)); -static const char *key_getuserfqdn __P((void)); +static const char *key_getfqdn(void); +static const char *key_getuserfqdn(void); #endif -static void key_sa_chgstate __P((struct secasvar *sav, u_int8_t state)); -static caddr_t key_appendmbuf __P((struct mbuf *, int)); +static void key_sa_chgstate(struct secasvar *, u_int8_t); +static struct mbuf *key_alloc_mbuf(int); + +extern int ipsec_bypass; +void ipsec_send_natt_keepalive(struct secasvar *sav); + + +/* + * PF_KEY init + * setup locks and call raw_init() + * + */ +void +key_init(void) +{ + + int i; + + sadb_mutex_grp_attr = lck_grp_attr_alloc_init(); + sadb_mutex_grp = lck_grp_alloc_init("sadb", sadb_mutex_grp_attr); + sadb_mutex_attr = lck_attr_alloc_init(); + lck_attr_setdefault(sadb_mutex_attr); + + if ((sadb_mutex = lck_mtx_alloc_init(sadb_mutex_grp, sadb_mutex_attr)) == NULL) { + printf("key_init: can't alloc sadb_mutex\n"); + return; + } + + for (i = 0; i < SPIHASHSIZE; i++) + LIST_INIT(&spihash[i]); + + raw_init(); +} + /* %%% IPsec policy management */ /* @@ -402,8 +553,10 @@ key_allocsp(spidx, dir) u_int dir; { struct secpolicy *sp; + struct timeval tv; int s; + lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_OWNED); /* sanity check */ if (spidx == NULL) panic("key_allocsp: NULL pointer is passed.\n"); @@ -418,11 +571,6 @@ key_allocsp(spidx, dir) } /* get a SP entry */ -#ifdef __NetBSD__ - s = splsoftnet(); /*called from softclock()*/ -#else - s = splnet(); /*called from softclock()*/ -#endif KEYDEBUG(KEYDEBUG_IPSEC_DATA, printf("*** objects\n"); kdebug_secpolicyindex(spidx)); @@ -438,7 +586,6 @@ key_allocsp(spidx, dir) goto found; } - splx(s); return NULL; found: @@ -446,8 +593,9 @@ found: KEY_CHKSPDIR(sp->spidx.dir, dir, "key_allocsp"); /* found a SPD entry */ + microtime(&tv); + sp->lastused = tv.tv_sec; sp->refcnt++; - splx(s); KEYDEBUG(KEYDEBUG_IPSEC_STAMP, printf("DP key_allocsp cause refcnt++:%d SP:%p\n", sp->refcnt, sp)); @@ -456,8 +604,81 @@ found: } /* - * allocating a SA entry for a *OUTBOUND* packet. - * checking each request entries in SP, and acquire SA if need. + * return a policy that matches this particular inbound packet. + * XXX slow + */ +struct secpolicy * +key_gettunnel(osrc, odst, isrc, idst) + struct sockaddr *osrc, *odst, *isrc, *idst; +{ + struct secpolicy *sp; + const int dir = IPSEC_DIR_INBOUND; + struct timeval tv; + int s; + struct ipsecrequest *r1, *r2, *p; + struct sockaddr *os, *od, *is, *id; + struct secpolicyindex spidx; + + lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_OWNED); + + if (isrc->sa_family != idst->sa_family) { + ipseclog((LOG_ERR, "protocol family mismatched %d != %d\n.", + isrc->sa_family, idst->sa_family)); + return NULL; + } + + LIST_FOREACH(sp, &sptree[dir], chain) { + if (sp->state == IPSEC_SPSTATE_DEAD) + continue; + + r1 = r2 = NULL; + for (p = sp->req; p; p = p->next) { + if (p->saidx.mode != IPSEC_MODE_TUNNEL) + continue; + + r1 = r2; + r2 = p; + + if (!r1) { + /* here we look at address matches only */ + spidx = sp->spidx; + if (isrc->sa_len > sizeof(spidx.src) || + idst->sa_len > sizeof(spidx.dst)) + continue; + bcopy(isrc, &spidx.src, isrc->sa_len); + bcopy(idst, &spidx.dst, idst->sa_len); + if (!key_cmpspidx_withmask(&sp->spidx, &spidx)) + continue; + } else { + is = (struct sockaddr *)&r1->saidx.src; + id = (struct sockaddr *)&r1->saidx.dst; + if (key_sockaddrcmp(is, isrc, 0) || + key_sockaddrcmp(id, idst, 0)) + continue; + } + + os = (struct sockaddr *)&r2->saidx.src; + od = (struct sockaddr *)&r2->saidx.dst; + if (key_sockaddrcmp(os, osrc, 0) || + key_sockaddrcmp(od, odst, 0)) + continue; + + goto found; + } + } + + return NULL; + +found: + microtime(&tv); + sp->lastused = tv.tv_sec; + sp->refcnt++; + return sp; +} + +/* + * allocating an SA entry for an *OUTBOUND* packet. + * checking each request entries in SP, and acquire an SA if need. * OUT: 0: there are valid requests. * ENOENT: policy may be valid, but SA with REQUIRE is on acquiring. */ @@ -469,6 +690,8 @@ key_checkrequest(isr, saidx) u_int level; int error; + lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_OWNED); + /* sanity check */ if (isr == NULL || saidx == NULL) panic("key_checkrequest: NULL pointer is passed.\n"); @@ -535,11 +758,9 @@ key_checkrequest(isr, saidx) /* there is no SA */ if ((error = key_acquire(saidx, isr->sp)) != 0) { - /* XXX What I do ? */ -#ifdef IPSEC_DEBUG - printf("key_checkrequest: error %d returned " - "from key_acquire.\n", error); -#endif + /* XXX What should I do ? */ + ipseclog((LOG_DEBUG, "key_checkrequest: error %d returned " + "from key_acquire.\n", error)); return error; } @@ -559,11 +780,15 @@ key_allocsa_policy(saidx) struct secashead *sah; struct secasvar *sav; u_int stateidx, state; + const u_int *saorder_state_valid; + int arraysize; + + lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_OWNED); LIST_FOREACH(sah, &sahtree, chain) { if (sah->state == SADB_SASTATE_DEAD) continue; - if (key_cmpsaidx_withmode(&sah->saidx, saidx)) + if (key_cmpsaidx(&sah->saidx, saidx, CMP_MODE_REQID)) goto found; } @@ -571,10 +796,19 @@ key_allocsa_policy(saidx) found: - /* search valid state */ - for (stateidx = 0; - stateidx < _ARRAYLEN(saorder_state_valid); - stateidx++) { + /* + * search a valid state list for outbound packet. + * This search order is important. + */ + if (key_preferred_oldsa) { + saorder_state_valid = saorder_state_valid_prefer_old; + arraysize = _ARRAYLEN(saorder_state_valid_prefer_old); + } else { + saorder_state_valid = saorder_state_valid_prefer_new; + arraysize = _ARRAYLEN(saorder_state_valid_prefer_new); + } + + for (stateidx = 0; stateidx < arraysize; stateidx++) { state = saorder_state_valid[stateidx]; @@ -598,12 +832,18 @@ key_do_allocsa_policy(sah, state) struct secashead *sah; u_int state; { - struct secasvar *sav, *candidate; + struct secasvar *sav, *nextsav, *candidate, *d; + + lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_OWNED); /* initilize */ candidate = NULL; - LIST_FOREACH(sav, &sah->savtree[state], chain) { + for (sav = LIST_FIRST(&sah->savtree[state]); + sav != NULL; + sav = nextsav) { + + nextsav = LIST_NEXT(sav, chain); /* sanity check */ KEY_CHKSASTATE(sav->state, state, "key_do_allocsa_policy"); @@ -621,11 +861,82 @@ key_do_allocsa_policy(sah, state) panic("key_do_allocsa_policy: " "lifetime_current is NULL.\n"); - /* XXX What the best method is to compare ? */ - if (candidate->lft_c->sadb_lifetime_addtime > + /* What the best method is to compare ? */ + if (key_preferred_oldsa) { + if (candidate->lft_c->sadb_lifetime_addtime > + sav->lft_c->sadb_lifetime_addtime) { + candidate = sav; + } + continue; + /*NOTREACHED*/ + } + + /* prefered new sa rather than old sa */ + if (candidate->lft_c->sadb_lifetime_addtime < sav->lft_c->sadb_lifetime_addtime) { + d = candidate; candidate = sav; - continue; + } else + d = sav; + + /* + * prepared to delete the SA when there is more + * suitable candidate and the lifetime of the SA is not + * permanent. + */ + if (d->lft_c->sadb_lifetime_addtime != 0) { + struct mbuf *m, *result; + + key_sa_chgstate(d, SADB_SASTATE_DEAD); + + m = key_setsadbmsg(SADB_DELETE, 0, + d->sah->saidx.proto, 0, 0, d->refcnt - 1); + if (!m) + goto msgfail; + result = m; + + /* set sadb_address for saidx's. */ + m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, + (struct sockaddr *)&d->sah->saidx.src, + d->sah->saidx.src.ss_len << 3, + IPSEC_ULPROTO_ANY); + if (!m) + goto msgfail; + m_cat(result, m); + + /* set sadb_address for saidx's. */ + m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, + (struct sockaddr *)&d->sah->saidx.src, + d->sah->saidx.src.ss_len << 3, + IPSEC_ULPROTO_ANY); + if (!m) + goto msgfail; + m_cat(result, m); + + /* create SA extension */ + m = key_setsadbsa(d); + if (!m) + goto msgfail; + m_cat(result, m); + + if (result->m_len < sizeof(struct sadb_msg)) { + result = m_pullup(result, + sizeof(struct sadb_msg)); + if (result == NULL) + goto msgfail; + } + + result->m_pkthdr.len = 0; + for (m = result; m; m = m->m_next) + result->m_pkthdr.len += m->m_len; + mtod(result, struct sadb_msg *)->sadb_msg_len = + PFKEY_UNIT64(result->m_pkthdr.len); + + if (key_sendup_mbuf(NULL, result, + KEY_SENDUP_REGISTERED)) + goto msgfail; + msgfail: + key_freesav(d); } } @@ -643,7 +954,7 @@ key_do_allocsa_policy(sah, state) * allocating a SA entry for a *INBOUND* packet. * Must call key_freesav() later. * OUT: positive: pointer to a sav. - * NULL: not found, or error occured. + * NULL: not found, or error occurred. * * In the comparison, source address will be ignored for RFC2401 conformance. * To quote, from section 4.1: @@ -651,7 +962,7 @@ key_do_allocsa_policy(sah, state) * of a Security Parameter Index (SPI), an IP Destination Address, and a * security protocol (AH or ESP) identifier. * Note that, however, we do need to keep source address in IPsec SA. - * IPsec SA. IKE specification and PF_KEY specification do assume that we + * IKE specification and PF_KEY specification do assume that we * keep source address in IPsec SA. We see a tricky situation here. */ struct secasvar * @@ -660,70 +971,150 @@ key_allocsa(family, src, dst, proto, spi) caddr_t src, dst; u_int32_t spi; { - struct secashead *sah; - struct secasvar *sav; - u_int stateidx, state; + struct secasvar *sav, *match; + u_int stateidx, state, tmpidx, matchidx; + struct sockaddr_in sin; + struct sockaddr_in6 sin6; int s; + const u_int *saorder_state_valid; + int arraysize; + + lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_OWNED); /* sanity check */ if (src == NULL || dst == NULL) panic("key_allocsa: NULL pointer is passed.\n"); + /* + * when both systems employ similar strategy to use a SA. + * the search order is important even in the inbound case. + */ + if (key_preferred_oldsa) { + saorder_state_valid = saorder_state_valid_prefer_old; + arraysize = _ARRAYLEN(saorder_state_valid_prefer_old); + } else { + saorder_state_valid = saorder_state_valid_prefer_new; + arraysize = _ARRAYLEN(saorder_state_valid_prefer_new); + } + /* * searching SAD. * XXX: to be checked internal IP header somewhere. Also when * IPsec tunnel packet is received. But ESP tunnel mode is * encrypted so we can't check internal IP header. */ -#ifdef __NetBSD__ - s = splsoftnet(); /*called from softclock()*/ -#else - s = splnet(); /*called from softclock()*/ -#endif - LIST_FOREACH(sah, &sahtree, chain) { - - /* search valid state */ - for (stateidx = 0; - stateidx < _ARRAYLEN(saorder_state_valid); - stateidx++) { - + /* + * search a valid state list for inbound packet. + * the search order is not important. + */ + match = NULL; + matchidx = arraysize; + LIST_FOREACH(sav, &spihash[SPIHASH(spi)], spihash) { + if (sav->spi != spi) + continue; + if (proto != sav->sah->saidx.proto) + continue; + if (family != sav->sah->saidx.src.ss_family || + family != sav->sah->saidx.dst.ss_family) + continue; + tmpidx = arraysize; + for (stateidx = 0; stateidx < matchidx; stateidx++) { state = saorder_state_valid[stateidx]; - LIST_FOREACH(sav, &sah->savtree[state], chain) { - - /* sanity check */ - KEY_CHKSASTATE(sav->state, state, "key_allocsav"); - if (proto != sav->sah->saidx.proto) - continue; - if (spi != sav->spi) - continue; + if (sav->state == state) { + tmpidx = stateidx; + break; + } + } + if (tmpidx >= matchidx) + continue; #if 0 /* don't check src */ - if (!key_bbcmp(src, - _INADDRBYSA(&sav->sah->saidx.src), - _INALENBYAF(sav->sah->saidx.src.ss_family) << 3)) - continue; + /* check src address */ + switch (family) { + case AF_INET: + bzero(&sin, sizeof(sin)); + sin.sin_family = AF_INET; + sin.sin_len = sizeof(sin); + bcopy(src, &sin.sin_addr, + sizeof(sin.sin_addr)); + if (key_sockaddrcmp((struct sockaddr*)&sin, + (struct sockaddr *)&sav->sah->saidx.src, 0) != 0) + continue; + break; + case AF_INET6: + bzero(&sin6, sizeof(sin6)); + sin6.sin6_family = AF_INET6; + sin6.sin6_len = sizeof(sin6); + bcopy(src, &sin6.sin6_addr, + sizeof(sin6.sin6_addr)); + if (IN6_IS_SCOPE_LINKLOCAL(&sin6.sin6_addr)) { + /* kame fake scopeid */ + sin6.sin6_scope_id = + ntohs(sin6.sin6_addr.s6_addr16[1]); + sin6.sin6_addr.s6_addr16[1] = 0; + } + if (key_sockaddrcmp((struct sockaddr*)&sin6, + (struct sockaddr *)&sav->sah->saidx.src, 0) != 0) + continue; + break; + default: + ipseclog((LOG_DEBUG, "key_allocsa: " + "unknown address family=%d.\n", + family)); + continue; + } + #endif - if (!key_bbcmp(dst, - _INADDRBYSA(&sav->sah->saidx.dst), - _INALENBYAF(sav->sah->saidx.dst.ss_family) << 3)) - continue; + /* check dst address */ + switch (family) { + case AF_INET: + bzero(&sin, sizeof(sin)); + sin.sin_family = AF_INET; + sin.sin_len = sizeof(sin); + bcopy(dst, &sin.sin_addr, + sizeof(sin.sin_addr)); + if (key_sockaddrcmp((struct sockaddr*)&sin, + (struct sockaddr *)&sav->sah->saidx.dst, 0) != 0) + continue; - goto found; - } + break; + case AF_INET6: + bzero(&sin6, sizeof(sin6)); + sin6.sin6_family = AF_INET6; + sin6.sin6_len = sizeof(sin6); + bcopy(dst, &sin6.sin6_addr, + sizeof(sin6.sin6_addr)); + if (IN6_IS_SCOPE_LINKLOCAL(&sin6.sin6_addr)) { + /* kame fake scopeid */ + sin6.sin6_scope_id = + ntohs(sin6.sin6_addr.s6_addr16[1]); + sin6.sin6_addr.s6_addr16[1] = 0; + } + if (key_sockaddrcmp((struct sockaddr*)&sin6, + (struct sockaddr *)&sav->sah->saidx.dst, 0) != 0) + continue; + break; + default: + ipseclog((LOG_DEBUG, "key_allocsa: " + "unknown address family=%d.\n", family)); + continue; } + + match = sav; + matchidx = tmpidx; } + if (match) + goto found; /* not found */ - splx(s); return NULL; found: - sav->refcnt++; - splx(s); + match->refcnt++; KEYDEBUG(KEYDEBUG_IPSEC_STAMP, printf("DP allocsa cause refcnt++:%d SA:%p\n", - sav->refcnt, sav)); - return sav; + match->refcnt, match)); + return match; } /* @@ -734,6 +1125,8 @@ void key_freesp(sp) struct secpolicy *sp; { + lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_OWNED); + /* sanity check */ if (sp == NULL) panic("key_freesp: NULL pointer is passed.\n"); @@ -749,6 +1142,7 @@ key_freesp(sp) return; } +#if 0 /* * Must be called after calling key_allocsp(). * For the packet with socket. @@ -757,6 +1151,8 @@ void key_freeso(so) struct socket *so; { + lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_OWNED); + /* sanity check */ if (so == NULL) panic("key_freeso: NULL pointer is passed.\n"); @@ -768,7 +1164,7 @@ key_freeso(so) struct inpcb *pcb = sotoinpcb(so); /* Does it have a PCB ? */ - if (pcb == NULL) + if (pcb == NULL || pcb->inp_sp == NULL) return; key_freesp_so(&pcb->inp_sp->sp_in); key_freesp_so(&pcb->inp_sp->sp_out); @@ -782,7 +1178,7 @@ key_freeso(so) struct inpcb *pcb = sotoinpcb(so); /* Does it have a PCB ? */ - if (pcb == NULL) + if (pcb == NULL || pcb->inp_sp == NULL) return; key_freesp_so(&pcb->inp_sp->sp_in); key_freesp_so(&pcb->inp_sp->sp_out); @@ -790,7 +1186,7 @@ key_freeso(so) struct in6pcb *pcb = sotoin6pcb(so); /* Does it have a PCB ? */ - if (pcb == NULL) + if (pcb == NULL || pcb->in6p_sp == NULL) return; key_freesp_so(&pcb->in6p_sp->sp_in); key_freesp_so(&pcb->in6p_sp->sp_out); @@ -799,20 +1195,22 @@ key_freeso(so) break; #endif /* INET6 */ default: -#if IPSEC_DEBUG - printf("key_freeso: unknown address family=%d.\n", - so->so_proto->pr_domain->dom_family); -#endif + ipseclog((LOG_DEBUG, "key_freeso: unknown address family=%d.\n", + so->so_proto->pr_domain->dom_family)); return; } return; } +#endif static void key_freesp_so(sp) struct secpolicy **sp; { + + lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_OWNED); + /* sanity check */ if (sp == NULL || *sp == NULL) panic("key_freesp_so: sp == NULL\n"); @@ -843,13 +1241,15 @@ void key_freesav(sav) struct secasvar *sav; { + lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_OWNED); + /* sanity check */ if (sav == NULL) panic("key_freesav: NULL pointer is passed.\n"); sav->refcnt--; KEYDEBUG(KEYDEBUG_IPSEC_STAMP, - printf("DP freesav cause refcnt--:%d SA:%p SPI %d\n", + printf("DP freesav cause refcnt--:%d SA:%p SPI %u\n", sav->refcnt, sav, (u_int32_t)ntohl(sav->spi))); if (sav->refcnt == 0) @@ -868,6 +1268,8 @@ key_delsp(sp) { int s; + lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_OWNED); + /* sanity check */ if (sp == NULL) panic("key_delsp: NULL pointer is passed.\n"); @@ -877,11 +1279,7 @@ key_delsp(sp) if (sp->refcnt > 0) return; /* can't free */ -#if __NetBSD__ - s = splsoftnet(); /*called from softclock()*/ -#else s = splnet(); /*called from softclock()*/ -#endif /* remove from SP index */ if (__LIST_CHAINED(sp)) LIST_REMOVE(sp, chain); @@ -922,6 +1320,8 @@ key_getsp(spidx) { struct secpolicy *sp; + lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_OWNED); + /* sanity check */ if (spidx == NULL) panic("key_getsp: NULL pointer is passed.\n"); @@ -949,6 +1349,8 @@ key_getspbyid(id) { struct secpolicy *sp; + lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_OWNED); + LIST_FOREACH(sp, &sptree[IPSEC_DIR_INBOUND], chain) { if (sp->state == IPSEC_SPSTATE_DEAD) continue; @@ -998,15 +1400,15 @@ key_msg2sp(xpl0, len, error) { struct secpolicy *newsp; + lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_OWNED); + /* sanity check */ if (xpl0 == NULL) panic("key_msg2sp: NULL pointer was passed.\n"); if (len < sizeof(*xpl0)) panic("key_msg2sp: invalid length.\n"); if (len != PFKEY_EXTLEN(xpl0)) { -#if IPSEC_DEBUG - printf("key_msg2sp: Invalid msg length.\n"); -#endif + ipseclog((LOG_DEBUG, "key_msg2sp: Invalid msg length.\n")); *error = EINVAL; return NULL; } @@ -1036,9 +1438,8 @@ key_msg2sp(xpl0, len, error) /* validity check */ if (PFKEY_EXTLEN(xpl0) < sizeof(*xpl0)) { -#if IPSEC_DEBUG - printf("key_msg2sp: Invalid msg length.\n"); -#endif + ipseclog((LOG_DEBUG, + "key_msg2sp: Invalid msg length.\n")); key_freesp(newsp); *error = EINVAL; return NULL; @@ -1051,10 +1452,8 @@ key_msg2sp(xpl0, len, error) /* length check */ if (xisr->sadb_x_ipsecrequest_len < sizeof(*xisr)) { -#if IPSEC_DEBUG - printf("key_msg2sp: " - "invalid ipsecrequest length.\n"); -#endif + ipseclog((LOG_DEBUG, "key_msg2sp: " + "invalid ipsecrequest length.\n")); key_freesp(newsp); *error = EINVAL; return NULL; @@ -1063,9 +1462,8 @@ key_msg2sp(xpl0, len, error) /* allocate request buffer */ KMALLOC(*p_isr, struct ipsecrequest *, sizeof(**p_isr)); if ((*p_isr) == NULL) { -#if IPSEC_DEBUG - printf("key_msg2sp: No more memory.\n"); -#endif + ipseclog((LOG_DEBUG, + "key_msg2sp: No more memory.\n")); key_freesp(newsp); *error = ENOBUFS; return NULL; @@ -1078,15 +1476,12 @@ key_msg2sp(xpl0, len, error) switch (xisr->sadb_x_ipsecrequest_proto) { case IPPROTO_ESP: case IPPROTO_AH: -#if 1 /*nonstandard*/ case IPPROTO_IPCOMP: -#endif break; default: -#if IPSEC_DEBUG - printf("key_msg2sp: invalid proto type=%u\n", - xisr->sadb_x_ipsecrequest_proto); -#endif + ipseclog((LOG_DEBUG, + "key_msg2sp: invalid proto type=%u\n", + xisr->sadb_x_ipsecrequest_proto)); key_freesp(newsp); *error = EPROTONOSUPPORT; return NULL; @@ -1099,10 +1494,9 @@ key_msg2sp(xpl0, len, error) break; case IPSEC_MODE_ANY: default: -#if IPSEC_DEBUG - printf("key_msg2sp: invalid mode=%u\n", - xisr->sadb_x_ipsecrequest_mode); -#endif + ipseclog((LOG_DEBUG, + "key_msg2sp: invalid mode=%u\n", + xisr->sadb_x_ipsecrequest_mode)); key_freesp(newsp); *error = EINVAL; return NULL; @@ -1122,12 +1516,10 @@ key_msg2sp(xpl0, len, error) */ if (xisr->sadb_x_ipsecrequest_reqid > IPSEC_MANUAL_REQID_MAX) { -#if IPSEC_DEBUG - printf("key_msg2sp: reqid=%d " - "range violation, " - "updated by kernel.\n", - xisr->sadb_x_ipsecrequest_reqid); -#endif + ipseclog((LOG_DEBUG, + "key_msg2sp: reqid=%d range " + "violation, updated by kernel.\n", + xisr->sadb_x_ipsecrequest_reqid)); xisr->sadb_x_ipsecrequest_reqid = 0; } @@ -1149,10 +1541,8 @@ key_msg2sp(xpl0, len, error) break; default: -#if IPSEC_DEBUG - printf("key_msg2sp: invalid level=%u\n", - xisr->sadb_x_ipsecrequest_level); -#endif + ipseclog((LOG_DEBUG, "key_msg2sp: invalid level=%u\n", + xisr->sadb_x_ipsecrequest_level)); key_freesp(newsp); *error = EINVAL; return NULL; @@ -1168,10 +1558,8 @@ key_msg2sp(xpl0, len, error) /* validity check */ if (paddr->sa_len > sizeof((*p_isr)->saidx.src)) { -#if IPSEC_DEBUG - printf("key_msg2sp: invalid request " - "address length.\n"); -#endif + ipseclog((LOG_DEBUG, "key_msg2sp: invalid request " + "address length.\n")); key_freesp(newsp); *error = EINVAL; return NULL; @@ -1185,10 +1573,8 @@ key_msg2sp(xpl0, len, error) /* validity check */ if (paddr->sa_len > sizeof((*p_isr)->saidx.dst)) { -#if IPSEC_DEBUG - printf("key_msg2sp: invalid request " - "address length.\n"); -#endif + ipseclog((LOG_DEBUG, "key_msg2sp: invalid request " + "address length.\n")); key_freesp(newsp); *error = EINVAL; return NULL; @@ -1206,9 +1592,7 @@ key_msg2sp(xpl0, len, error) /* validity check */ if (tlen < 0) { -#if IPSEC_DEBUG - printf("key_msg2sp: becoming tlen < 0.\n"); -#endif + ipseclog((LOG_DEBUG, "key_msg2sp: becoming tlen < 0.\n")); key_freesp(newsp); *error = EINVAL; return NULL; @@ -1220,9 +1604,7 @@ key_msg2sp(xpl0, len, error) } break; default: -#if IPSEC_DEBUG - printf("key_msg2sp: invalid policy type.\n"); -#endif + ipseclog((LOG_DEBUG, "key_msg2sp: invalid policy type.\n")); key_freesp(newsp); *error = EINVAL; return NULL; @@ -1237,6 +1619,8 @@ key_newreqid() { static u_int32_t auto_reqid = IPSEC_MANUAL_REQID_MAX + 1; + lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_OWNED); + auto_reqid = (auto_reqid == ~0 ? IPSEC_MANUAL_REQID_MAX + 1 : auto_reqid + 1); @@ -1257,27 +1641,18 @@ key_sp2msg(sp) caddr_t p; struct mbuf *m; + lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_OWNED); + /* sanity check. */ if (sp == NULL) panic("key_sp2msg: NULL pointer was passed.\n"); tlen = key_getspreqmsglen(sp); - MGET(m, M_DONTWAIT, MT_DATA); - if (m && MLEN < tlen) { - MCLGET(m, M_DONTWAIT); - if ((m->m_flags & M_EXT) == 0) { - m_free(m); - m = NULL; - } - } - m->m_len = 0; - if (!m || M_TRAILINGSPACE(m) < tlen) { -#if IPSEC_DEBUG - printf("key_sp2msg: No more memory.\n"); -#endif + m = key_alloc_mbuf(tlen); + if (!m || m->m_next) { /*XXX*/ if (m) - m_free(m); + m_freem(m); return NULL; } @@ -1323,57 +1698,142 @@ key_sp2msg(sp) return m; } +/* m will not be freed nor modified */ +static struct mbuf * +key_gather_mbuf(struct mbuf *m, const struct sadb_msghdr *mhp, + int ndeep, int nitem, int *items) +{ + int idx; + int i; + struct mbuf *result = NULL, *n; + int len; + + if (m == NULL || mhp == NULL) + panic("null pointer passed to key_gather"); + + for (i = 0; i < nitem; i++) { + idx = items[i]; + if (idx < 0 || idx > SADB_EXT_MAX) + goto fail; + /* don't attempt to pull empty extension */ + if (idx == SADB_EXT_RESERVED && mhp->msg == NULL) + continue; + if (idx != SADB_EXT_RESERVED && + (mhp->ext[idx] == NULL || mhp->extlen[idx] == 0)) + continue; + + if (idx == SADB_EXT_RESERVED) { + len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); +#if DIAGNOSTIC + if (len > MHLEN) + panic("assumption failed"); +#endif + MGETHDR(n, M_DONTWAIT, MT_DATA); + if (!n) + goto fail; + n->m_len = len; + n->m_next = NULL; + m_copydata(m, 0, sizeof(struct sadb_msg), + mtod(n, caddr_t)); + } else if (i < ndeep) { + len = mhp->extlen[idx]; + n = key_alloc_mbuf(len); + if (!n || n->m_next) { /*XXX*/ + if (n) + m_freem(n); + goto fail; + } + m_copydata(m, mhp->extoff[idx], mhp->extlen[idx], + mtod(n, caddr_t)); + } else { + n = m_copym(m, mhp->extoff[idx], mhp->extlen[idx], + M_DONTWAIT); + } + if (n == NULL) + goto fail; + + if (result) + m_cat(result, n); + else + result = n; + } + + if ((result->m_flags & M_PKTHDR) != 0) { + result->m_pkthdr.len = 0; + for (n = result; n; n = n->m_next) + result->m_pkthdr.len += n->m_len; + } + + return result; + +fail: + m_freem(result); + return NULL; +} + /* * SADB_X_SPDADD, SADB_X_SPDSETIDX or SADB_X_SPDUPDATE processing * add a entry to SP database, when received - * + * * from the user(?). * Adding to SP database, * and send - * + * * to the socket which was send. * * SPDADD set a unique policy entry. * SPDSETIDX like SPDADD without a part of policy requests. * SPDUPDATE replace a unique policy entry. * - * IN: mhp: pointer to the pointer to each header. - * OUT: NULL if fail. - * other if success, return pointer to the message to send. - * + * m will always be freed. */ -static struct sadb_msg * -key_spdadd(mhp) - caddr_t *mhp; +static int +key_spdadd(so, m, mhp) + struct socket *so; + struct mbuf *m; + const struct sadb_msghdr *mhp; { - struct sadb_msg *msg0; struct sadb_address *src0, *dst0; - struct sadb_x_policy *xpl0; + struct sadb_x_policy *xpl0, *xpl; + struct sadb_lifetime *lft = NULL; struct secpolicyindex spidx; struct secpolicy *newsp; + struct timeval tv; int error; + lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_OWNED); + /* sanity check */ - if (mhp == NULL || mhp[0] == NULL) + if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) panic("key_spdadd: NULL pointer is passed.\n"); - msg0 = (struct sadb_msg *)mhp[0]; - - if (mhp[SADB_EXT_ADDRESS_SRC] == NULL - || mhp[SADB_EXT_ADDRESS_DST] == NULL - || mhp[SADB_X_EXT_POLICY] == NULL) { -#if IPSEC_DEBUG - printf("key_spdadd: invalid message is passed.\n"); -#endif - msg0->sadb_msg_errno = EINVAL; - return NULL; + if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || + mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || + mhp->ext[SADB_X_EXT_POLICY] == NULL) { + ipseclog((LOG_DEBUG, "key_spdadd: invalid message is passed.\n")); + return key_senderror(so, m, EINVAL); + } + if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || + mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || + mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { + ipseclog((LOG_DEBUG, "key_spdadd: invalid message is passed.\n")); + return key_senderror(so, m, EINVAL); + } + if (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL) { + if (mhp->extlen[SADB_EXT_LIFETIME_HARD] + < sizeof(struct sadb_lifetime)) { + ipseclog((LOG_DEBUG, "key_spdadd: invalid message is passed.\n")); + return key_senderror(so, m, EINVAL); + } + lft = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_HARD]; } - src0 = (struct sadb_address *)mhp[SADB_EXT_ADDRESS_SRC]; - dst0 = (struct sadb_address *)mhp[SADB_EXT_ADDRESS_DST]; - xpl0 = (struct sadb_x_policy *)mhp[SADB_X_EXT_POLICY]; + src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; + dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; + xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY]; /* make secindex */ + /* XXX boundary check against sa_len */ KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir, src0 + 1, dst0 + 1, @@ -1388,75 +1848,58 @@ key_spdadd(mhp) case IPSEC_DIR_OUTBOUND: break; default: -#if IPSEC_DEBUG - printf("key_spdadd: Invalid SP direction.\n"); -#endif - msg0->sadb_msg_errno = EINVAL; - return NULL; + ipseclog((LOG_DEBUG, "key_spdadd: Invalid SP direction.\n")); + mhp->msg->sadb_msg_errno = EINVAL; + return 0; } /* check policy */ /* key_spdadd() accepts DISCARD, NONE and IPSEC. */ if (xpl0->sadb_x_policy_type == IPSEC_POLICY_ENTRUST || xpl0->sadb_x_policy_type == IPSEC_POLICY_BYPASS) { -#if IPSEC_DEBUG - printf("key_spdadd: Invalid policy type.\n"); -#endif - msg0->sadb_msg_errno = EINVAL; - return NULL; + ipseclog((LOG_DEBUG, "key_spdadd: Invalid policy type.\n")); + return key_senderror(so, m, EINVAL); } /* policy requests are mandatory when action is ipsec. */ - if (msg0->sadb_msg_type != SADB_X_SPDSETIDX + if (mhp->msg->sadb_msg_type != SADB_X_SPDSETIDX && xpl0->sadb_x_policy_type == IPSEC_POLICY_IPSEC - && PFKEY_EXTLEN(xpl0) <= sizeof(*xpl0)) { -#if IPSEC_DEBUG - printf("key_spdadd: some policy requests part required.\n"); -#endif - msg0->sadb_msg_errno = EINVAL; - return NULL; + && mhp->extlen[SADB_X_EXT_POLICY] <= sizeof(*xpl0)) { + ipseclog((LOG_DEBUG, "key_spdadd: some policy requests part required.\n")); + return key_senderror(so, m, EINVAL); } /* * checking there is SP already or not. - * If type is SPDUPDATE and no SP found, then error. - * If type is either SPDADD or SPDSETIDX and SP found, then error. + * SPDUPDATE doesn't depend on whether there is a SP or not. + * If the type is either SPDADD or SPDSETIDX AND a SP is found, + * then error. */ newsp = key_getsp(&spidx); - if (msg0->sadb_msg_type == SADB_X_SPDUPDATE) { - if (newsp == NULL) { -#if IPSEC_DEBUG - printf("key_spdadd: no SP found.\n"); -#endif - msg0->sadb_msg_errno = ENOENT; - return NULL; + if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) { + if (newsp) { + newsp->state = IPSEC_SPSTATE_DEAD; + key_freesp(newsp); } - - newsp->state = IPSEC_SPSTATE_DEAD; - key_freesp(newsp); } else { if (newsp != NULL) { key_freesp(newsp); -#if IPSEC_DEBUG - printf("key_spdadd: a SP entry exists already.\n"); -#endif - msg0->sadb_msg_errno = EEXIST; - return NULL; + ipseclog((LOG_DEBUG, "key_spdadd: a SP entry exists already.\n")); + return key_senderror(so, m, EEXIST); } } /* allocation new SP entry */ if ((newsp = key_msg2sp(xpl0, PFKEY_EXTLEN(xpl0), &error)) == NULL) { - msg0->sadb_msg_errno = error; - return NULL; + return key_senderror(so, m, error); } if ((newsp->id = key_getnewspid()) == 0) { - msg0->sadb_msg_errno = ENOBUFS; keydb_delsecpolicy(newsp); - return NULL; + return key_senderror(so, m, ENOBUFS); } + /* XXX boundary check against sa_len */ KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir, src0 + 1, dst0 + 1, @@ -1468,83 +1911,102 @@ key_spdadd(mhp) /* sanity check on addr pair */ if (((struct sockaddr *)(src0 + 1))->sa_family != ((struct sockaddr *)(dst0+ 1))->sa_family) { - msg0->sadb_msg_errno = EINVAL; keydb_delsecpolicy(newsp); - return NULL; + return key_senderror(so, m, EINVAL); + } + if (((struct sockaddr *)(src0 + 1))->sa_len != + ((struct sockaddr *)(dst0+ 1))->sa_len) { + keydb_delsecpolicy(newsp); + return key_senderror(so, m, EINVAL); } #if 1 if (newsp->req && newsp->req->saidx.src.ss_family) { struct sockaddr *sa; sa = (struct sockaddr *)(src0 + 1); if (sa->sa_family != newsp->req->saidx.src.ss_family) { - msg0->sadb_msg_errno = EINVAL; keydb_delsecpolicy(newsp); - return NULL; + return key_senderror(so, m, EINVAL); } } if (newsp->req && newsp->req->saidx.dst.ss_family) { struct sockaddr *sa; sa = (struct sockaddr *)(dst0 + 1); if (sa->sa_family != newsp->req->saidx.dst.ss_family) { - msg0->sadb_msg_errno = EINVAL; keydb_delsecpolicy(newsp); - return NULL; + return key_senderror(so, m, EINVAL); } } #endif + microtime(&tv); + newsp->created = tv.tv_sec; + newsp->lastused = tv.tv_sec; + newsp->lifetime = lft ? lft->sadb_lifetime_addtime : 0; + newsp->validtime = lft ? lft->sadb_lifetime_usetime : 0; + newsp->refcnt = 1; /* do not reclaim until I say I do */ newsp->state = IPSEC_SPSTATE_ALIVE; - LIST_INSERT_HEAD(&sptree[newsp->spidx.dir], newsp, chain); + LIST_INSERT_TAIL(&sptree[newsp->spidx.dir], newsp, secpolicy, chain); + + /* Turn off the ipsec bypass */ + if (ipsec_bypass != 0) + ipsec_bypass = 0; /* delete the entry in spacqtree */ - if (msg0->sadb_msg_type == SADB_X_SPDUPDATE) { + if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) { struct secspacq *spacq; if ((spacq = key_getspacq(&spidx)) != NULL) { - /* reset counter in order to deletion by timehander. */ - spacq->tick = key_blockacq_lifetime; + /* reset counter in order to deletion by timehandler. */ + microtime(&tv); + spacq->created = tv.tv_sec; spacq->count = 0; } } { + struct mbuf *n, *mpolicy; struct sadb_msg *newmsg; - u_int len; - caddr_t p; + int off; /* create new sadb_msg to reply. */ - len = sizeof(struct sadb_msg) - + PFKEY_EXTLEN(mhp[SADB_X_EXT_POLICY]) - + PFKEY_EXTLEN(mhp[SADB_EXT_ADDRESS_SRC]) - + PFKEY_EXTLEN(mhp[SADB_EXT_ADDRESS_DST]); - - KMALLOC(newmsg, struct sadb_msg *, len); - if (newmsg == NULL) { -#if IPSEC_DEBUG - printf("key_spdadd: No more memory.\n"); -#endif - /* newsp persists in the kernel */ - msg0->sadb_msg_errno = ENOBUFS; - return NULL; + if (lft) { + int mbufItems[] = {SADB_EXT_RESERVED, SADB_X_EXT_POLICY, + SADB_EXT_LIFETIME_HARD, SADB_EXT_ADDRESS_SRC, + SADB_EXT_ADDRESS_DST}; + n = key_gather_mbuf(m, mhp, 2, sizeof(mbufItems)/sizeof(int), mbufItems); + } else { + int mbufItems[] = {SADB_EXT_RESERVED, SADB_X_EXT_POLICY, + SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST}; + n = key_gather_mbuf(m, mhp, 2, sizeof(mbufItems)/sizeof(int), mbufItems); } - bzero((caddr_t)newmsg, len); + if (!n) + return key_senderror(so, m, ENOBUFS); - bcopy((caddr_t)msg0, (caddr_t)newmsg, sizeof(*msg0)); + if (n->m_len < sizeof(*newmsg)) { + n = m_pullup(n, sizeof(*newmsg)); + if (!n) + return key_senderror(so, m, ENOBUFS); + } + newmsg = mtod(n, struct sadb_msg *); newmsg->sadb_msg_errno = 0; - newmsg->sadb_msg_len = PFKEY_UNIT64(len); - p = (caddr_t)newmsg + sizeof(*msg0); + newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); - /* - * reqid may had been updated at key_msg2sp() if reqid's - * range violation. - */ - ((struct sadb_x_policy *)mhp[SADB_X_EXT_POLICY])->sadb_x_policy_id = newsp->id; - p = key_setsadbext(p, mhp[SADB_X_EXT_POLICY]); - - p = key_setsadbext(p, mhp[SADB_EXT_ADDRESS_SRC]); - p = key_setsadbext(p, mhp[SADB_EXT_ADDRESS_DST]); + off = 0; + mpolicy = m_pulldown(n, PFKEY_ALIGN8(sizeof(struct sadb_msg)), + sizeof(*xpl), &off); + if (mpolicy == NULL) { + /* n is already freed */ + return key_senderror(so, m, ENOBUFS); + } + xpl = (struct sadb_x_policy *)(mtod(mpolicy, caddr_t) + off); + if (xpl->sadb_x_policy_exttype != SADB_X_EXT_POLICY) { + m_freem(n); + return key_senderror(so, m, EINVAL); + } + xpl->sadb_x_policy_id = newsp->id; - return newmsg; + m_freem(m); + return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); } } @@ -1561,9 +2023,11 @@ key_getnewspid() int count = key_spi_trycnt; /* XXX */ struct secpolicy *sp; + lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_OWNED); + /* when requesting to allocate spi ranged */ while (count--) { - newid = (policy_id = (policy_id == ~0 ? 1 : ++policy_id)); + newid = (policy_id = (policy_id == ~0 ? 1 : policy_id + 1)); if ((sp = key_getspbyid(newid)) == NULL) break; @@ -1572,9 +2036,7 @@ key_getnewspid() } if (count == 0 || newid == 0) { -#if IPSEC_DEBUG - printf("key_getnewspid: to allocate policy id is failed.\n"); -#endif + ipseclog((LOG_DEBUG, "key_getnewspid: to allocate policy id is failed.\n")); return 0; } @@ -1591,41 +2053,44 @@ key_getnewspid() * to the ikmpd. * policy(*) including direction of policy. * - * IN: mhp: pointer to the pointer to each header. - * OUT: other if success, return pointer to the message to send. - * 0 if fail. + * m will always be freed. */ -static struct sadb_msg * -key_spddelete(mhp) - caddr_t *mhp; +static int +key_spddelete(so, m, mhp) + struct socket *so; + struct mbuf *m; + const struct sadb_msghdr *mhp; { - struct sadb_msg *msg0; struct sadb_address *src0, *dst0; struct sadb_x_policy *xpl0; struct secpolicyindex spidx; struct secpolicy *sp; + lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_OWNED); + /* sanity check */ - if (mhp == NULL || mhp[0] == NULL) + if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) panic("key_spddelete: NULL pointer is passed.\n"); - msg0 = (struct sadb_msg *)mhp[0]; - - if (mhp[SADB_EXT_ADDRESS_SRC] == NULL - || mhp[SADB_EXT_ADDRESS_DST] == NULL - || mhp[SADB_X_EXT_POLICY] == NULL) { -#if IPSEC_DEBUG - printf("key_spddelete: invalid message is passed.\n"); -#endif - msg0->sadb_msg_errno = EINVAL; - return NULL; + if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || + mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || + mhp->ext[SADB_X_EXT_POLICY] == NULL) { + ipseclog((LOG_DEBUG, "key_spddelete: invalid message is passed.\n")); + return key_senderror(so, m, EINVAL); + } + if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || + mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || + mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { + ipseclog((LOG_DEBUG, "key_spddelete: invalid message is passed.\n")); + return key_senderror(so, m, EINVAL); } - src0 = (struct sadb_address *)(mhp[SADB_EXT_ADDRESS_SRC]); - dst0 = (struct sadb_address *)(mhp[SADB_EXT_ADDRESS_DST]); - xpl0 = (struct sadb_x_policy *)mhp[SADB_X_EXT_POLICY]; + src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; + dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; + xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY]; /* make secindex */ + /* XXX boundary check against sa_len */ KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir, src0 + 1, dst0 + 1, @@ -1640,20 +2105,14 @@ key_spddelete(mhp) case IPSEC_DIR_OUTBOUND: break; default: -#if IPSEC_DEBUG - printf("key_spddelete: Invalid SP direction.\n"); -#endif - msg0->sadb_msg_errno = EINVAL; - return NULL; + ipseclog((LOG_DEBUG, "key_spddelete: Invalid SP direction.\n")); + return key_senderror(so, m, EINVAL); } /* Is there SP in SPD ? */ if ((sp = key_getsp(&spidx)) == NULL) { -#if IPSEC_DEBUG - printf("key_spddelete: no SP found.\n"); -#endif - msg0->sadb_msg_errno = ENOENT; - return NULL; + ipseclog((LOG_DEBUG, "key_spddelete: no SP found.\n")); + return key_senderror(so, m, EINVAL); } /* save policy id to buffer to be returned. */ @@ -1663,36 +2122,22 @@ key_spddelete(mhp) key_freesp(sp); { + struct mbuf *n; struct sadb_msg *newmsg; - u_int len; - caddr_t p; + int mbufItems[] = {SADB_EXT_RESERVED, SADB_X_EXT_POLICY, + SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST}; /* create new sadb_msg to reply. */ - len = sizeof(struct sadb_msg) - + PFKEY_EXTLEN(mhp[SADB_X_EXT_POLICY]) - + PFKEY_EXTLEN(mhp[SADB_EXT_ADDRESS_SRC]) - + PFKEY_EXTLEN(mhp[SADB_EXT_ADDRESS_DST]); - - KMALLOC(newmsg, struct sadb_msg *, len); - if (newmsg == NULL) { -#if IPSEC_DEBUG - printf("key_spddelete: No more memory.\n"); -#endif - msg0->sadb_msg_errno = ENOBUFS; - return NULL; - } - bzero((caddr_t)newmsg, len); + n = key_gather_mbuf(m, mhp, 1, sizeof(mbufItems)/sizeof(int), mbufItems); + if (!n) + return key_senderror(so, m, ENOBUFS); - bcopy((caddr_t)mhp[0], (caddr_t)newmsg, sizeof(*msg0)); + newmsg = mtod(n, struct sadb_msg *); newmsg->sadb_msg_errno = 0; - newmsg->sadb_msg_len = PFKEY_UNIT64(len); - p = (caddr_t)newmsg + sizeof(*msg0); - - p = key_setsadbext(p, mhp[SADB_X_EXT_POLICY]); - p = key_setsadbext(p, mhp[SADB_EXT_ADDRESS_SRC]); - p = key_setsadbext(p, mhp[SADB_EXT_ADDRESS_DST]); + newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); - return newmsg; + m_freem(m); + return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); } } @@ -1706,73 +2151,91 @@ key_spddelete(mhp) * to the ikmpd. * policy(*) including direction of policy. * - * IN: mhp: pointer to the pointer to each header. - * OUT: other if success, return pointer to the message to send. - * 0 if fail. + * m will always be freed. */ -static struct sadb_msg * -key_spddelete2(mhp) - caddr_t *mhp; +static int +key_spddelete2(so, m, mhp) + struct socket *so; + struct mbuf *m; + const struct sadb_msghdr *mhp; { - struct sadb_msg *msg0; u_int32_t id; struct secpolicy *sp; + lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_OWNED); + /* sanity check */ - if (mhp == NULL || mhp[0] == NULL) + if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) panic("key_spddelete2: NULL pointer is passed.\n"); - msg0 = (struct sadb_msg *)mhp[0]; - - if (mhp[SADB_X_EXT_POLICY] == NULL) { -#if IPSEC_DEBUG - printf("key_spddelete2: invalid message is passed.\n"); -#endif - msg0->sadb_msg_errno = EINVAL; - return NULL; + if (mhp->ext[SADB_X_EXT_POLICY] == NULL || + mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { + ipseclog((LOG_DEBUG, "key_spddelete2: invalid message is passed.\n")); + key_senderror(so, m, EINVAL); + return 0; } - id = ((struct sadb_x_policy *)mhp[SADB_X_EXT_POLICY])->sadb_x_policy_id; + id = ((struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id; /* Is there SP in SPD ? */ if ((sp = key_getspbyid(id)) == NULL) { -#if IPSEC_DEBUG - printf("key_spddelete2: no SP found id:%u.\n", id); -#endif - msg0->sadb_msg_errno = ENOENT; - return NULL; + ipseclog((LOG_DEBUG, "key_spddelete2: no SP found id:%u.\n", id)); + key_senderror(so, m, EINVAL); } sp->state = IPSEC_SPSTATE_DEAD; key_freesp(sp); { + struct mbuf *n, *nn; struct sadb_msg *newmsg; - u_int len; - caddr_t p; + int off, len; /* create new sadb_msg to reply. */ - len = sizeof(struct sadb_msg) - + PFKEY_EXTLEN(mhp[SADB_X_EXT_POLICY]); + len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); + + if (len > MCLBYTES) + return key_senderror(so, m, ENOBUFS); + MGETHDR(n, M_DONTWAIT, MT_DATA); + if (n && len > MHLEN) { + MCLGET(n, M_DONTWAIT); + if ((n->m_flags & M_EXT) == 0) { + m_freem(n); + n = NULL; + } + } + if (!n) + return key_senderror(so, m, ENOBUFS); + + n->m_len = len; + n->m_next = NULL; + off = 0; - KMALLOC(newmsg, struct sadb_msg *, len); - if (newmsg == NULL) { -#if IPSEC_DEBUG - printf("key_spddelete2: No more memory.\n"); + m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, caddr_t) + off); + off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); + +#if DIAGNOSTIC + if (off != len) + panic("length inconsistency in key_spddelete2"); #endif - msg0->sadb_msg_errno = ENOBUFS; - return NULL; + + n->m_next = m_copym(m, mhp->extoff[SADB_X_EXT_POLICY], + mhp->extlen[SADB_X_EXT_POLICY], M_DONTWAIT); + if (!n->m_next) { + m_freem(n); + return key_senderror(so, m, ENOBUFS); } - bzero((caddr_t)newmsg, len); - bcopy((caddr_t)mhp[0], (caddr_t)newmsg, sizeof(*msg0)); - newmsg->sadb_msg_errno = 0; - newmsg->sadb_msg_len = PFKEY_UNIT64(len); - p = (caddr_t)newmsg + sizeof(*msg0); + n->m_pkthdr.len = 0; + for (nn = n; nn; nn = nn->m_next) + n->m_pkthdr.len += nn->m_len; - p = key_setsadbext(p, mhp[SADB_X_EXT_POLICY]); + newmsg = mtod(n, struct sadb_msg *); + newmsg->sadb_msg_errno = 0; + newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); - return newmsg; + m_freem(m); + return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); } } @@ -1786,49 +2249,44 @@ key_spddelete2(mhp) * to the ikmpd. * policy(*) including direction of policy. * - * IN: mhp: pointer to the pointer to each header. - * OUT: other if success, return pointer to the message to send. - * 0 if fail. + * m will always be freed. */ static int -key_spdget(mhp, so, target) - caddr_t *mhp; +key_spdget(so, m, mhp) struct socket *so; - int target; + struct mbuf *m; + const struct sadb_msghdr *mhp; { - struct sadb_msg *msg0; u_int32_t id; struct secpolicy *sp; - struct mbuf *m; + struct mbuf *n; + + lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_OWNED); /* sanity check */ - if (mhp == NULL || mhp[0] == NULL) + if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) panic("key_spdget: NULL pointer is passed.\n"); - msg0 = (struct sadb_msg *)mhp[0]; - - if (mhp[SADB_X_EXT_POLICY] == NULL) { -#if IPSEC_DEBUG - printf("key_spdget: invalid message is passed.\n"); -#endif - return EINVAL; + if (mhp->ext[SADB_X_EXT_POLICY] == NULL || + mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { + ipseclog((LOG_DEBUG, "key_spdget: invalid message is passed.\n")); + return key_senderror(so, m, EINVAL); } - id = ((struct sadb_x_policy *)mhp[SADB_X_EXT_POLICY])->sadb_x_policy_id; + id = ((struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id; /* Is there SP in SPD ? */ if ((sp = key_getspbyid(id)) == NULL) { -#if IPSEC_DEBUG - printf("key_spdget: no SP found id:%u.\n", id); -#endif - return ENOENT; + ipseclog((LOG_DEBUG, "key_spdget: no SP found id:%u.\n", id)); + return key_senderror(so, m, ENOENT); } - m = key_setdumpsp(sp, SADB_X_SPDGET, 0, msg0->sadb_msg_pid); - if (m != NULL) - key_sendup_mbuf(so, m, target); - - return 0; + n = key_setdumpsp(sp, SADB_X_SPDGET, 0, mhp->msg->sadb_msg_pid); + if (n != NULL) { + m_freem(m); + return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); + } else + return key_senderror(so, m, ENOBUFS); } /* @@ -1837,7 +2295,7 @@ key_spdget(mhp, so, target) * send * * to KMD, and expect to receive - * with SADB_X_SPDACQUIRE if error occured, + * with SADB_X_SPDACQUIRE if error occurred, * or * * with SADB_X_SPDUPDATE from KMD by PF_KEY. @@ -1850,9 +2308,12 @@ int key_spdacquire(sp) struct secpolicy *sp; { + struct mbuf *result = NULL, *m; struct secspacq *newspacq; int error; + lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_OWNED); + /* sanity check */ if (sp == NULL) panic("key_spdacquire: NULL pointer is passed.\n"); @@ -1880,69 +2341,27 @@ key_spdacquire(sp) LIST_INSERT_HEAD(&spacqtree, newspacq, chain); } - { - struct sadb_msg *newmsg = NULL; - union sadb_x_ident_id id; - u_int len; - caddr_t p; - /* create new sadb_msg to reply. */ - len = sizeof(struct sadb_msg) - + sizeof(struct sadb_ident) - + PFKEY_ALIGN8(sp->spidx.src.ss_len) - + sizeof(struct sadb_ident) - + PFKEY_ALIGN8(sp->spidx.dst.ss_len); - - KMALLOC(newmsg, struct sadb_msg *, len); - if (newmsg == 0) { -#if IPSEC_DEBUG - printf("key_spdacquire: No more memory.\n"); -#endif - return ENOBUFS; + m = key_setsadbmsg(SADB_X_SPDACQUIRE, 0, 0, 0, 0, 0); + if (!m) { + error = ENOBUFS; + goto fail; } - bzero((caddr_t)newmsg, len); + result = m; - newmsg->sadb_msg_version = PF_KEY_V2; - newmsg->sadb_msg_type = SADB_X_SPDACQUIRE; - newmsg->sadb_msg_errno = 0; - newmsg->sadb_msg_satype = 0; - newmsg->sadb_msg_len = PFKEY_UNIT64(len); - newmsg->sadb_msg_mode = 0; - newmsg->sadb_msg_reqid = 0; - newmsg->sadb_msg_seq = 0; - newmsg->sadb_msg_pid = 0; - p = (caddr_t)newmsg + sizeof(struct sadb_msg); - - /* set sadb_address for spidx's. */ - bzero(&id, sizeof(id)); - id.sadb_x_ident_id_addr.prefix = sp->spidx.prefs; - id.sadb_x_ident_id_addr.ul_proto = sp->spidx.ul_proto; - p = key_setsadbident(p, - SADB_EXT_IDENTITY_SRC, - SADB_X_IDENTTYPE_ADDR, - (caddr_t)&sp->spidx.src, - sp->spidx.src.ss_len, - *(u_int64_t *)&id); - - bzero(&id, sizeof(id)); - id.sadb_x_ident_id_addr.prefix = sp->spidx.prefd; - id.sadb_x_ident_id_addr.ul_proto = sp->spidx.ul_proto; - p = key_setsadbident(p, - SADB_EXT_IDENTITY_DST, - SADB_X_IDENTTYPE_ADDR, - (caddr_t)&sp->spidx.dst, - sp->spidx.dst.ss_len, - *(u_int64_t *)&id); - - error = key_sendall(newmsg, len); -#if IPSEC_DEBUG - if (error != 0) - printf("key_spdacquire: key_sendall returned %d\n", error); -#endif - return error; - } + result->m_pkthdr.len = 0; + for (m = result; m; m = m->m_next) + result->m_pkthdr.len += m->m_len; - return 0; + mtod(result, struct sadb_msg *)->sadb_msg_len = + PFKEY_UNIT64(result->m_pkthdr.len); + + return key_sendup_mbuf(NULL, m, KEY_SENDUP_REGISTERED); + +fail: + if (result) + m_freem(result); + return error; } /* @@ -1955,23 +2374,26 @@ key_spdacquire(sp) * to the user. * NOTE: what to do is only marking SADB_SASTATE_DEAD. * - * IN: mhp: pointer to the pointer to each header. - * OUT: other if success, return pointer to the message to send. - * 0 if fail. + * m will always be freed. */ -static struct sadb_msg * -key_spdflush(mhp) - caddr_t *mhp; +static int +key_spdflush(so, m, mhp) + struct socket *so; + struct mbuf *m; + const struct sadb_msghdr *mhp; { - struct sadb_msg *msg0; + struct sadb_msg *newmsg; struct secpolicy *sp; u_int dir; + lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_OWNED); + /* sanity check */ - if (mhp == NULL || mhp[0] == NULL) + if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) panic("key_spdflush: NULL pointer is passed.\n"); - msg0 = (struct sadb_msg *)mhp[0]; + if (m->m_len != PFKEY_ALIGN8(sizeof(struct sadb_msg))) + return key_senderror(so, m, EINVAL); for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { LIST_FOREACH(sp, &sptree[dir], chain) { @@ -1979,29 +2401,20 @@ key_spdflush(mhp) } } - { - struct sadb_msg *newmsg; - u_int len; - - /* create new sadb_msg to reply. */ - len = sizeof(struct sadb_msg); - - KMALLOC(newmsg, struct sadb_msg *, len); - if (newmsg == NULL) { -#if IPSEC_DEBUG - printf("key_spdflush: No more memory.\n"); -#endif - msg0->sadb_msg_errno = ENOBUFS; - return NULL; + if (sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) { + ipseclog((LOG_DEBUG, "key_spdflush: No more memory.\n")); + return key_senderror(so, m, ENOBUFS); } - bzero((caddr_t)newmsg, len); - bcopy((caddr_t)mhp[0], (caddr_t)newmsg, sizeof(*msg0)); + if (m->m_next) + m_freem(m->m_next); + m->m_next = NULL; + m->m_pkthdr.len = m->m_len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); + newmsg = mtod(m, struct sadb_msg *); newmsg->sadb_msg_errno = 0; - newmsg->sadb_msg_len = PFKEY_UNIT64(len); + newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len); - return(newmsg); - } + return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); } /* @@ -2013,28 +2426,25 @@ key_spdflush(mhp) * ..... * to the ikmpd. * - * IN: mhp: pointer to the pointer to each header. - * OUT: other if success, return pointer to the message to send. - * 0 if fail. + * m will always be freed. */ static int -key_spddump(mhp, so, target) - caddr_t *mhp; +key_spddump(so, m, mhp) struct socket *so; - int target; + struct mbuf *m; + const struct sadb_msghdr *mhp; { - struct sadb_msg *msg0; struct secpolicy *sp; int cnt; u_int dir; - struct mbuf *m; + struct mbuf *n; + + lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_OWNED); /* sanity check */ - if (mhp == NULL || mhp[0] == NULL) + if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) panic("key_spddump: NULL pointer is passed.\n"); - msg0 = (struct sadb_msg *)mhp[0]; - /* search SPD entry and get buffer size. */ cnt = 0; for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { @@ -2044,19 +2454,20 @@ key_spddump(mhp, so, target) } if (cnt == 0) - return ENOENT; + return key_senderror(so, m, ENOENT); for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { LIST_FOREACH(sp, &sptree[dir], chain) { --cnt; - m = key_setdumpsp(sp, SADB_X_SPDDUMP, - cnt, msg0->sadb_msg_pid); + n = key_setdumpsp(sp, SADB_X_SPDDUMP, cnt, + mhp->msg->sadb_msg_pid); - if (m) - key_sendup_mbuf(so, m, target); + if (n) + key_sendup_mbuf(so, n, KEY_SENDUP_ONE); } } + m_freem(m); return 0; } @@ -2066,108 +2477,55 @@ key_setdumpsp(sp, type, seq, pid) u_int8_t type; u_int32_t seq, pid; { - struct mbuf *m; - u_int tlen; - - /* XXX it would be better to avoid pre-computing length */ - tlen = key_getspmsglen(sp); + struct mbuf *result = NULL, *m; - /* XXX maybe it's a wrong idea to insist on cluster? */ - MGETHDR(m, M_DONTWAIT, MT_DATA); - if (m != NULL) { - MCLGET(m, M_DONTWAIT); - if ((m->m_flags & M_EXT) == 0) { - m_freem(m); - m = NULL; - } - } - if (m == NULL) - return NULL; /*ENOBUFS*/ - - m->m_pkthdr.len = m->m_len = 0; - m->m_next = NULL; - - /* sadb_msg->sadb_msg_len must be filled afterwards */ - if (key_setsadbmsg_m(m, type, 0, SADB_SATYPE_UNSPEC, seq, pid, - IPSEC_MODE_ANY, 0, 0, sp->refcnt) != 0) { - m_freem(m); - return NULL; - } - - if (key_setsadbaddr_m(m, SADB_EXT_ADDRESS_SRC, - (struct sockaddr *)&sp->spidx.src, sp->spidx.prefs, - sp->spidx.ul_proto) != 0) { - m_freem(m); - return NULL; - } + lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_OWNED); - if (key_setsadbaddr_m(m, SADB_EXT_ADDRESS_DST, - (struct sockaddr *)&sp->spidx.dst, sp->spidx.prefd, - sp->spidx.ul_proto) != 0) { - m_freem(m); - return NULL; - } + m = key_setsadbmsg(type, 0, SADB_SATYPE_UNSPEC, seq, pid, sp->refcnt); + if (!m) + goto fail; + result = m; - { - struct mbuf *n; - struct sadb_x_policy *tmp; + m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, + (struct sockaddr *)&sp->spidx.src, sp->spidx.prefs, + sp->spidx.ul_proto); + if (!m) + goto fail; + m_cat(result, m); - n = key_sp2msg(sp); - if (!n || n->m_len < sizeof(*tmp)) { -#if IPSEC_DEBUG - printf("key_setdumpsp: No more memory.\n"); -#endif - m_freem(m); - if (n) - m_freem(n); - return NULL; - } + m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, + (struct sockaddr *)&sp->spidx.dst, sp->spidx.prefd, + sp->spidx.ul_proto); + if (!m) + goto fail; + m_cat(result, m); - tmp = mtod(n, struct sadb_x_policy *); + m = key_sp2msg(sp); + if (!m) + goto fail; + m_cat(result, m); - /* validity check */ - if (key_getspreqmsglen(sp) != PFKEY_UNUNIT64(tmp->sadb_x_policy_len) - || n->m_len != PFKEY_UNUNIT64(tmp->sadb_x_policy_len)) - panic("key_setdumpsp: length mismatch." - "sp:%d msg:%d\n", - key_getspreqmsglen(sp), - PFKEY_UNUNIT64(tmp->sadb_x_policy_len)); - - m_cat(m, n); - m->m_pkthdr.len += n->m_len; - } + if ((result->m_flags & M_PKTHDR) == 0) + goto fail; - if (m->m_len < sizeof(struct sadb_msg)) { - m = m_pullup(m, sizeof(struct sadb_msg)); - if (m == NULL) - return NULL; + if (result->m_len < sizeof(struct sadb_msg)) { + result = m_pullup(result, sizeof(struct sadb_msg)); + if (result == NULL) + goto fail; } - mtod(m, struct sadb_msg *)->sadb_msg_len = - PFKEY_UNIT64(m->m_pkthdr.len); - - return m; -} - -/* get sadb message length for a SP. */ -static u_int -key_getspmsglen(sp) - struct secpolicy *sp; -{ - u_int tlen; - /* sanity check */ - if (sp == NULL) - panic("key_getspmsglen: NULL pointer is passed.\n"); + result->m_pkthdr.len = 0; + for (m = result; m; m = m->m_next) + result->m_pkthdr.len += m->m_len; - tlen = (sizeof(struct sadb_msg) - + sizeof(struct sadb_address) - + PFKEY_ALIGN8(_SALENBYAF(sp->spidx.src.ss_family)) - + sizeof(struct sadb_address) - + PFKEY_ALIGN8(_SALENBYAF(sp->spidx.dst.ss_family))); + mtod(result, struct sadb_msg *)->sadb_msg_len = + PFKEY_UNIT64(result->m_pkthdr.len); - tlen += key_getspreqmsglen(sp); + return result; - return tlen; +fail: + m_freem(result); + return NULL; } /* @@ -2179,6 +2537,8 @@ key_getspreqmsglen(sp) { u_int tlen; + lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_OWNED); + tlen = sizeof(struct sadb_x_policy); /* if is the policy for ipsec ? */ @@ -2202,38 +2562,155 @@ key_getspreqmsglen(sp) return tlen; } -/* %%% SAD management */ /* - * allocating a memory for new SA head, and copy from the values of mhp. - * OUT: NULL : failure due to the lack of memory. - * others : pointer to new SA head. + * SADB_SPDEXPIRE processing + * send + * + * to KMD by PF_KEY. + * + * OUT: 0 : succeed + * others : error number */ -static struct secashead * -key_newsah(saidx) - struct secasindex *saidx; +static int +key_spdexpire(sp) + struct secpolicy *sp; { - struct secashead *newsah; + int s; + struct mbuf *result = NULL, *m; + int len; + int error = -1; + struct sadb_lifetime *lt; + + lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_OWNED); /* sanity check */ - if (saidx == NULL) - panic("key_newsaidx: NULL pointer is passed.\n"); + if (sp == NULL) + panic("key_spdexpire: NULL pointer is passed.\n"); - newsah = keydb_newsecashead(); - if (newsah == NULL) - return NULL; + /* set msg header */ + m = key_setsadbmsg(SADB_X_SPDEXPIRE, 0, 0, 0, 0, 0); + if (!m) { + error = ENOBUFS; + goto fail; + } + result = m; - bcopy(saidx, &newsah->saidx, sizeof(newsah->saidx)); + /* create lifetime extension (current and hard) */ + len = PFKEY_ALIGN8(sizeof(*lt)) * 2; + m = key_alloc_mbuf(len); + if (!m || m->m_next) { /*XXX*/ + if (m) + m_freem(m); + error = ENOBUFS; + goto fail; + } + bzero(mtod(m, caddr_t), len); + lt = mtod(m, struct sadb_lifetime *); + lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); + lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; + lt->sadb_lifetime_allocations = 0; + lt->sadb_lifetime_bytes = 0; + lt->sadb_lifetime_addtime = sp->created; + lt->sadb_lifetime_usetime = sp->lastused; + lt = (struct sadb_lifetime *)(mtod(m, caddr_t) + len / 2); + lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); + lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD; + lt->sadb_lifetime_allocations = 0; + lt->sadb_lifetime_bytes = 0; + lt->sadb_lifetime_addtime = sp->lifetime; + lt->sadb_lifetime_usetime = sp->validtime; + m_cat(result, m); - /* add to saidxtree */ - newsah->state = SADB_SASTATE_MATURE; - LIST_INSERT_HEAD(&sahtree, newsah, chain); + /* set sadb_address for source */ + m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, + (struct sockaddr *)&sp->spidx.src, + sp->spidx.prefs, sp->spidx.ul_proto); + if (!m) { + error = ENOBUFS; + goto fail; + } + m_cat(result, m); - return(newsah); -} + /* set sadb_address for destination */ + m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, + (struct sockaddr *)&sp->spidx.dst, + sp->spidx.prefd, sp->spidx.ul_proto); + if (!m) { + error = ENOBUFS; + goto fail; + } + m_cat(result, m); -/* - * delete SA index and all SA registerd. - */ + /* set secpolicy */ + m = key_sp2msg(sp); + if (!m) { + error = ENOBUFS; + goto fail; + } + m_cat(result, m); + + if ((result->m_flags & M_PKTHDR) == 0) { + error = EINVAL; + goto fail; + } + + if (result->m_len < sizeof(struct sadb_msg)) { + result = m_pullup(result, sizeof(struct sadb_msg)); + if (result == NULL) { + error = ENOBUFS; + goto fail; + } + } + + result->m_pkthdr.len = 0; + for (m = result; m; m = m->m_next) + result->m_pkthdr.len += m->m_len; + + mtod(result, struct sadb_msg *)->sadb_msg_len = + PFKEY_UNIT64(result->m_pkthdr.len); + + return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); + + fail: + if (result) + m_freem(result); + return error; +} + +/* %%% SAD management */ +/* + * allocating a memory for new SA head, and copy from the values of mhp. + * OUT: NULL : failure due to the lack of memory. + * others : pointer to new SA head. + */ +static struct secashead * +key_newsah(saidx) + struct secasindex *saidx; +{ + struct secashead *newsah; + + lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_OWNED); + + /* sanity check */ + if (saidx == NULL) + panic("key_newsaidx: NULL pointer is passed.\n"); + + newsah = keydb_newsecashead(); + if (newsah == NULL) + return NULL; + + bcopy(saidx, &newsah->saidx, sizeof(newsah->saidx)); + + /* add to saidxtree */ + newsah->state = SADB_SASTATE_MATURE; + LIST_INSERT_HEAD(&sahtree, newsah, chain); + + return(newsah); +} + +/* + * delete SA index and all SA registerd. + */ static void key_delsah(sah) struct secashead *sah; @@ -2243,15 +2720,13 @@ key_delsah(sah) int s; int zombie = 0; + lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_OWNED); + /* sanity check */ if (sah == NULL) panic("key_delsah: NULL pointer is passed.\n"); -#ifdef __NetBSD__ - s = splsoftnet(); /*called from softclock()*/ -#else s = splnet(); /*called from softclock()*/ -#endif /* searching all SA registerd in the secindex. */ for (stateidx = 0; @@ -2289,7 +2764,7 @@ key_delsah(sah) } if (sah->sa_route.ro_rt) { - RTFREE(sah->sa_route.ro_rt); + rtfree(sah->sa_route.ro_rt); sah->sa_route.ro_rt = (struct rtentry *)NULL; } @@ -2312,75 +2787,84 @@ key_delsah(sah) * not to call key_setsava(). * OUT: NULL : fail * others : pointer to new secasvar. + * + * does not modify mbuf. does not free mbuf on error. */ static struct secasvar * -key_newsav(mhp, sah) - caddr_t *mhp; +key_newsav(m, mhp, sah, errp) + struct mbuf *m; + const struct sadb_msghdr *mhp; struct secashead *sah; + int *errp; { struct secasvar *newsav; - struct sadb_msg *msg0; + const struct sadb_sa *xsa; + + lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_OWNED); /* sanity check */ - if (mhp == NULL || mhp[0] == NULL || sah == NULL) + if (m == NULL || mhp == NULL || mhp->msg == NULL || sah == NULL) panic("key_newsa: NULL pointer is passed.\n"); - msg0 = (struct sadb_msg *)mhp[0]; - KMALLOC(newsav, struct secasvar *, sizeof(struct secasvar)); if (newsav == NULL) { -#if IPSEC_DEBUG - printf("key_newsa: No more memory.\n"); -#endif - msg0->sadb_msg_errno = ENOBUFS; + ipseclog((LOG_DEBUG, "key_newsa: No more memory.\n")); + *errp = ENOBUFS; return NULL; } bzero((caddr_t)newsav, sizeof(struct secasvar)); - switch (msg0->sadb_msg_type) { + switch (mhp->msg->sadb_msg_type) { case SADB_GETSPI: - newsav->spi = 0; + key_setspi(newsav, 0); #if IPSEC_DOSEQCHECK /* sync sequence number */ - if (msg0->sadb_msg_seq == 0) + if (mhp->msg->sadb_msg_seq == 0) newsav->seq = (acq_seq = (acq_seq == ~0 ? 1 : ++acq_seq)); else #endif - newsav->seq = msg0->sadb_msg_seq; + newsav->seq = mhp->msg->sadb_msg_seq; break; case SADB_ADD: /* sanity check */ - if (mhp[SADB_EXT_SA] == NULL) { + if (mhp->ext[SADB_EXT_SA] == NULL) { KFREE(newsav); -#if IPSEC_DEBUG - printf("key_newsa: invalid message is passed.\n"); -#endif - msg0->sadb_msg_errno = EINVAL; + ipseclog((LOG_DEBUG, "key_newsa: invalid message is passed.\n")); + *errp = EINVAL; return NULL; } - newsav->spi = ((struct sadb_sa *)mhp[SADB_EXT_SA])->sadb_sa_spi; - newsav->seq = msg0->sadb_msg_seq; + xsa = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA]; + key_setspi(newsav, xsa->sadb_sa_spi); + newsav->seq = mhp->msg->sadb_msg_seq; break; default: KFREE(newsav); - msg0->sadb_msg_errno = EINVAL; + *errp = EINVAL; return NULL; } /* copy sav values */ - if (msg0->sadb_msg_type != SADB_GETSPI && key_setsaval(newsav, mhp)) { - KFREE(newsav); - /* msg0->sadb_msg_errno is set at key_setsaval. */ - return NULL; + if (mhp->msg->sadb_msg_type != SADB_GETSPI) { + *errp = key_setsaval(newsav, m, mhp); + if (*errp) { + if (newsav->spihash.le_prev || newsav->spihash.le_next) + LIST_REMOVE(newsav, spihash); + KFREE(newsav); + return NULL; + } } - /* reset tick */ - newsav->tick = 0; + /* reset created */ + { + struct timeval tv; + microtime(&tv); + newsav->created = tv.tv_sec; + } - newsav->pid = msg0->sadb_msg_pid; + newsav->pid = mhp->msg->sadb_msg_pid; /* add to satree */ newsav->sah = sah; @@ -2399,6 +2883,8 @@ static void key_delsav(sav) struct secasvar *sav; { + lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_OWNED); + /* sanity check */ if (sav == NULL) panic("key_delsav: NULL pointer is passed.\n"); @@ -2409,29 +2895,45 @@ key_delsav(sav) /* remove from SA header */ if (__LIST_CHAINED(sav)) LIST_REMOVE(sav, chain); + + if (sav->spihash.le_prev || sav->spihash.le_next) + LIST_REMOVE(sav, spihash); - if (sav->key_auth != NULL) + if (sav->key_auth != NULL) { + bzero(_KEYBUF(sav->key_auth), _KEYLEN(sav->key_auth)); KFREE(sav->key_auth); - if (sav->key_enc != NULL) + sav->key_auth = NULL; + } + if (sav->key_enc != NULL) { + bzero(_KEYBUF(sav->key_enc), _KEYLEN(sav->key_enc)); KFREE(sav->key_enc); - if (sav->replay != NULL) + sav->key_enc = NULL; + } + if (sav->sched) { + bzero(sav->sched, sav->schedlen); + KFREE(sav->sched); + sav->sched = NULL; + } + if (sav->replay != NULL) { keydb_delsecreplay(sav->replay); - if (sav->lft_c != NULL) + sav->replay = NULL; + } + if (sav->lft_c != NULL) { KFREE(sav->lft_c); - if (sav->lft_h != NULL) + sav->lft_c = NULL; + } + if (sav->lft_h != NULL) { KFREE(sav->lft_h); - if (sav->lft_s != NULL) + sav->lft_h = NULL; + } + if (sav->lft_s != NULL) { KFREE(sav->lft_s); - if (sav->iv != NULL) + sav->lft_s = NULL; + } + if (sav->iv != NULL) { KFREE(sav->iv); -#if notyet - if (sav->misc1 != NULL) - KFREE(sav->misc1); - if (sav->misc2 != NULL) - KFREE(sav->misc2); - if (sav->misc3 != NULL) - KFREE(sav->misc3); -#endif + sav->iv = NULL; + } KFREE(sav); @@ -2450,11 +2952,13 @@ key_getsah(saidx) { struct secashead *sah; + lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_OWNED); + LIST_FOREACH(sah, &sahtree, chain) { if (sah->state == SADB_SASTATE_DEAD) continue; - if (key_cmpsaidx_exactly(&sah->saidx, saidx)) - return(sah); + if (key_cmpsaidx(&sah->saidx, saidx, CMP_REQID)) + return sah; } return NULL; @@ -2472,30 +2976,47 @@ key_checkspidup(saidx, spi) struct secasindex *saidx; u_int32_t spi; { - struct secashead *sah; struct secasvar *sav; + u_int stateidx, state; + + lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_OWNED); /* check address family */ if (saidx->src.ss_family != saidx->dst.ss_family) { -#if IPSEC_DEBUG - printf("key_checkspidup: address family mismatched.\n"); -#endif + ipseclog((LOG_DEBUG, "key_checkspidup: address family mismatched.\n")); return NULL; } /* check all SAD */ - LIST_FOREACH(sah, &sahtree, chain) { - if (!key_ismyaddr(sah->saidx.dst.ss_family, - _INADDRBYSA(&sah->saidx.dst))) + LIST_FOREACH(sav, &spihash[SPIHASH(spi)], spihash) { + if (sav->spi != spi) continue; - sav = key_getsavbyspi(sah, spi); - if (sav != NULL) - return sav; + for (stateidx = 0; + stateidx < _ARRAYLEN(saorder_state_alive); + stateidx++) { + state = saorder_state_alive[stateidx]; + if (sav->state == state && + key_ismyaddr((struct sockaddr *)&sav->sah->saidx.dst)) + return sav; + } } return NULL; } +static void +key_setspi(sav, spi) + struct secasvar *sav; + u_int32_t spi; +{ + + sav->spi = spi; + if (sav->spihash.le_prev || sav->spihash.le_next) + LIST_REMOVE(sav, spihash); + LIST_INSERT_HEAD(&spihash[SPIHASH(spi)], sav, spihash); +} + + /* * search SAD litmited alive SA, protocol, SPI. * OUT: @@ -2507,375 +3028,326 @@ key_getsavbyspi(sah, spi) struct secashead *sah; u_int32_t spi; { - struct secasvar *sav; - u_int stateidx, state; - - /* search all status */ - for (stateidx = 0; - stateidx < _ARRAYLEN(saorder_state_alive); - stateidx++) { - - state = saorder_state_alive[stateidx]; - LIST_FOREACH(sav, &sah->savtree[state], chain) { - - /* sanity check */ - if (sav->state != state) { -#if IPSEC_DEBUG - printf("key_getsavbyspi: " - "invalid sav->state " - "(queue: %d SA: %d)\n", - state, sav->state); -#endif - continue; + struct secasvar *sav, *match; + u_int stateidx, state, matchidx; + + match = NULL; + matchidx = _ARRAYLEN(saorder_state_alive); + LIST_FOREACH(sav, &spihash[SPIHASH(spi)], spihash) { + if (sav->spi != spi) + continue; + if (sav->sah != sah) + continue; + for (stateidx = 0; stateidx < matchidx; stateidx++) { + state = saorder_state_alive[stateidx]; + if (sav->state == state) { + match = sav; + matchidx = stateidx; + break; } - - if (sav->spi == spi) - return sav; } } - return NULL; + return match; } /* * copy SA values from PF_KEY message except *SPI, SEQ, PID, STATE and TYPE*. * You must update these if need. * OUT: 0: success. - * 1: failure. set errno to (mhp[0])->sadb_msg_errno. + * !0: failure. + * + * does not modify mbuf. does not free mbuf on error. */ static int -key_setsaval(sav, mhp) +key_setsaval(sav, m, mhp) struct secasvar *sav; - caddr_t *mhp; + struct mbuf *m; + const struct sadb_msghdr *mhp; { - struct sadb_msg *msg0; +#if IPSEC_ESP + const struct esp_algorithm *algo; +#endif int error = 0; + struct timeval tv; + + lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_OWNED); /* sanity check */ - if (mhp == NULL || mhp[0] == NULL) + if (m == NULL || mhp == NULL || mhp->msg == NULL) panic("key_setsaval: NULL pointer is passed.\n"); - msg0 = (struct sadb_msg *)mhp[0]; - /* initialization */ sav->replay = NULL; sav->key_auth = NULL; sav->key_enc = NULL; + sav->sched = NULL; + sav->schedlen = 0; sav->iv = NULL; sav->lft_c = NULL; sav->lft_h = NULL; sav->lft_s = NULL; -#if notyet - sav->misc1 = NULL; - sav->misc2 = NULL; - sav->misc3 = NULL; -#endif + sav->remote_ike_port = 0; + sav->natt_last_activity = natt_now; /* SA */ - if (mhp[SADB_EXT_SA] != NULL) { - struct sadb_sa *sa0 = (struct sadb_sa *)mhp[SADB_EXT_SA]; + if (mhp->ext[SADB_EXT_SA] != NULL) { + const struct sadb_sa *sa0; + + sa0 = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA]; + if (mhp->extlen[SADB_EXT_SA] < sizeof(*sa0)) { + ipseclog((LOG_DEBUG, "key_setsaval: invalid message size.\n")); + error = EINVAL; + goto fail; + } sav->alg_auth = sa0->sadb_sa_auth; sav->alg_enc = sa0->sadb_sa_encrypt; sav->flags = sa0->sadb_sa_flags; + + /* + * Verify that a nat-traversal port was specified if + * the nat-traversal flag is set. + */ + if ((sav->flags & SADB_X_EXT_NATT) != 0) { + if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa_2) || + ((struct sadb_sa_2*)(sa0))->sadb_sa_natt_port == 0) { + ipseclog((LOG_DEBUG, "key_setsaval: natt port not set.\n")); + error = EINVAL; + goto fail; + } + sav->remote_ike_port = ((struct sadb_sa_2*)(sa0))->sadb_sa_natt_port; + } /* replay window */ if ((sa0->sadb_sa_flags & SADB_X_EXT_OLD) == 0) { sav->replay = keydb_newsecreplay(sa0->sadb_sa_replay); if (sav->replay == NULL) { -#if IPSEC_DEBUG - printf("key_setsaval: No more memory.\n"); -#endif + ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n")); error = ENOBUFS; - goto err; + goto fail; } } } /* Authentication keys */ - if (mhp[SADB_EXT_KEY_AUTH] != NULL) { - struct sadb_key *key0; - u_int len; + if (mhp->ext[SADB_EXT_KEY_AUTH] != NULL) { + const struct sadb_key *key0; + int len; - key0 = (struct sadb_key *)mhp[SADB_EXT_KEY_AUTH]; - len = PFKEY_UNUNIT64(key0->sadb_key_len); + key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_AUTH]; + len = mhp->extlen[SADB_EXT_KEY_AUTH]; error = 0; - if (len < sizeof(struct sadb_key)) + if (len < sizeof(*key0)) { + ipseclog((LOG_DEBUG, "key_setsaval: invalid auth key ext len. len = %d\n", len)); error = EINVAL; - switch (msg0->sadb_msg_satype) { + goto fail; + } + switch (mhp->msg->sadb_msg_satype) { case SADB_SATYPE_AH: case SADB_SATYPE_ESP: - if (len == sizeof(struct sadb_key) - && sav->alg_auth != SADB_AALG_NULL) { + if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) && + sav->alg_auth != SADB_X_AALG_NULL) error = EINVAL; - } break; case SADB_X_SATYPE_IPCOMP: - error = EINVAL; - break; default: error = EINVAL; break; } if (error) { -#if IPSEC_DEBUG - printf("key_setsaval: invalid key_auth values.\n"); -#endif - goto err; + ipseclog((LOG_DEBUG, "key_setsaval: invalid key_auth values.\n")); + goto fail; } sav->key_auth = (struct sadb_key *)key_newbuf(key0, len); if (sav->key_auth == NULL) { -#if IPSEC_DEBUG - printf("key_setsaval: No more memory.\n"); -#endif + ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n")); error = ENOBUFS; - goto err; + goto fail; } - - /* make length shift up for kernel*/ - sav->key_auth->sadb_key_len = len; } /* Encryption key */ - if (mhp[SADB_EXT_KEY_ENCRYPT] != NULL) { - struct sadb_key *key0; - u_int len; + if (mhp->ext[SADB_EXT_KEY_ENCRYPT] != NULL) { + const struct sadb_key *key0; + int len; - key0 = (struct sadb_key *)mhp[SADB_EXT_KEY_ENCRYPT]; - len = PFKEY_UNUNIT64(key0->sadb_key_len); + key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_ENCRYPT]; + len = mhp->extlen[SADB_EXT_KEY_ENCRYPT]; error = 0; - if (len < sizeof(struct sadb_key)) + if (len < sizeof(*key0)) { + ipseclog((LOG_DEBUG, "key_setsaval: invalid encryption key ext len. len = %d\n", len)); error = EINVAL; - switch (msg0->sadb_msg_satype) { + goto fail; + } + switch (mhp->msg->sadb_msg_satype) { case SADB_SATYPE_ESP: - if (len == sizeof(struct sadb_key) - && sav->alg_enc != SADB_EALG_NULL) { + if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) && + sav->alg_enc != SADB_EALG_NULL) { + ipseclog((LOG_DEBUG, "key_setsaval: invalid ESP algorithm.\n")); error = EINVAL; + break; + } + sav->key_enc = (struct sadb_key *)key_newbuf(key0, len); + if (sav->key_enc == NULL) { + ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n")); + error = ENOBUFS; + goto fail; } - break; - case SADB_SATYPE_AH: - error = EINVAL; break; case SADB_X_SATYPE_IPCOMP: + if (len != PFKEY_ALIGN8(sizeof(struct sadb_key))) + error = EINVAL; + sav->key_enc = NULL; /*just in case*/ break; + case SADB_SATYPE_AH: default: error = EINVAL; break; } if (error) { -#if IPSEC_DEBUG - printf("key_setsatval: invalid key_enc value.\n"); -#endif - goto err; - } - - sav->key_enc = (struct sadb_key *)key_newbuf(key0, len); - if (sav->key_enc == NULL) { -#if IPSEC_DEBUG - printf("key_setsaval: No more memory.\n"); -#endif - error = ENOBUFS; - goto err; + ipseclog((LOG_DEBUG, "key_setsaval: invalid key_enc value.\n")); + goto fail; } - - /* make length shift up for kernel*/ - sav->key_enc->sadb_key_len = len; } /* set iv */ sav->ivlen = 0; - switch (msg0->sadb_msg_satype) { + switch (mhp->msg->sadb_msg_satype) { case SADB_SATYPE_ESP: #if IPSEC_ESP - { - struct esp_algorithm *algo; - - algo = &esp_algorithms[sav->alg_enc]; + algo = esp_algorithm_lookup(sav->alg_enc); if (algo && algo->ivlen) - sav->ivlen = (*algo->ivlen)(sav); + sav->ivlen = (*algo->ivlen)(algo, sav); + if (sav->ivlen == 0) + break; KMALLOC(sav->iv, caddr_t, sav->ivlen); if (sav->iv == 0) { -#if IPSEC_DEBUG - printf("key_setsaval: No more memory.\n"); -#endif + ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n")); error = ENOBUFS; - goto err; + goto fail; } - /* initialize ? */ - break; - } -#else - break; + + /* initialize */ + key_randomfill(sav->iv, sav->ivlen); #endif + break; case SADB_SATYPE_AH: -#if 1 /*nonstandard*/ case SADB_X_SATYPE_IPCOMP: -#endif break; default: -#if IPSEC_DEBUG - printf("key_setsaval: invalid SA type.\n"); -#endif + ipseclog((LOG_DEBUG, "key_setsaval: invalid SA type.\n")); error = EINVAL; - goto err; + goto fail; } - /* reset tick */ - sav->tick = 0; + /* reset created */ + microtime(&tv); + sav->created = tv.tv_sec; /* make lifetime for CURRENT */ - { - struct timeval tv; - KMALLOC(sav->lft_c, struct sadb_lifetime *, - sizeof(struct sadb_lifetime)); + sizeof(struct sadb_lifetime)); if (sav->lft_c == NULL) { -#if IPSEC_DEBUG - printf("key_setsaval: No more memory.\n"); -#endif + ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n")); error = ENOBUFS; - goto err; + goto fail; } microtime(&tv); sav->lft_c->sadb_lifetime_len = - PFKEY_UNIT64(sizeof(struct sadb_lifetime)); + PFKEY_UNIT64(sizeof(struct sadb_lifetime)); sav->lft_c->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; sav->lft_c->sadb_lifetime_allocations = 0; sav->lft_c->sadb_lifetime_bytes = 0; sav->lft_c->sadb_lifetime_addtime = tv.tv_sec; sav->lft_c->sadb_lifetime_usetime = 0; - } /* lifetimes for HARD and SOFT */ { - struct sadb_lifetime *lft0; + const struct sadb_lifetime *lft0; - lft0 = (struct sadb_lifetime *)mhp[SADB_EXT_LIFETIME_HARD]; + lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_HARD]; if (lft0 != NULL) { + if (mhp->extlen[SADB_EXT_LIFETIME_HARD] < sizeof(*lft0)) { + ipseclog((LOG_DEBUG, "key_setsaval: invalid hard lifetime ext len.\n")); + error = EINVAL; + goto fail; + } sav->lft_h = (struct sadb_lifetime *)key_newbuf(lft0, - sizeof(*lft0)); + sizeof(*lft0)); if (sav->lft_h == NULL) { -#if IPSEC_DEBUG - printf("key_setsaval: No more memory.\n"); -#endif + ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n")); error = ENOBUFS; - goto err; + goto fail; } /* to be initialize ? */ } - lft0 = (struct sadb_lifetime *)mhp[SADB_EXT_LIFETIME_SOFT]; + lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_SOFT]; if (lft0 != NULL) { + if (mhp->extlen[SADB_EXT_LIFETIME_SOFT] < sizeof(*lft0)) { + ipseclog((LOG_DEBUG, "key_setsaval: invalid soft lifetime ext len.\n")); + error = EINVAL; + goto fail; + } sav->lft_s = (struct sadb_lifetime *)key_newbuf(lft0, - sizeof(*lft0)); + sizeof(*lft0)); if (sav->lft_s == NULL) { -#if IPSEC_DEBUG - printf("key_setsaval: No more memory.\n"); -#endif + ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n")); error = ENOBUFS; - goto err; + goto fail; } /* to be initialize ? */ } } -#if notyet - /* pre-processing for DES */ - switch (sav->alg_enc) { - case SADB_EALG_DESCBC: - if (des_key_sched((C_Block *)_KEYBUF(sav->key_enc), - (des_key_schedule)sav->misc1) != 0) { -#if IPSEC_DEBUG - printf("key_setsaval: error des_key_sched.\n"); -#endif - sav->misc1 = NULL; - /* THROUGH */ - } - break; - case SADB_EALG_3DESCBC: - if (des_key_sched((C_Block *)_KEYBUF(sav->key_enc), - (des_key_schedule)sav->misc1) != 0 - || des_key_sched((C_Block *)(_KEYBUF(sav->key_enc) + 8), - (des_key_schedule)sav->misc2) != 0 - || des_key_sched((C_Block *)(_KEYBUF(sav->key_enc) + 16), - (des_key_schedule)sav->misc3) != 0) { -#if IPSEC_DEBUG - printf("key_setsaval: error des_key_sched.\n"); -#endif - sav->misc1 = NULL; - sav->misc2 = NULL; - sav->misc3 = NULL; - /* THROUGH */ - } - } -#endif - - msg0->sadb_msg_errno = 0; return 0; - err: + fail: /* initialization */ - if (sav->replay != NULL) + if (sav->replay != NULL) { keydb_delsecreplay(sav->replay); - if (sav->key_auth != NULL) + sav->replay = NULL; + } + if (sav->key_auth != NULL) { + bzero(_KEYBUF(sav->key_auth), _KEYLEN(sav->key_auth)); KFREE(sav->key_auth); - if (sav->key_enc != NULL) + sav->key_auth = NULL; + } + if (sav->key_enc != NULL) { + bzero(_KEYBUF(sav->key_enc), _KEYLEN(sav->key_enc)); KFREE(sav->key_enc); - if (sav->iv != NULL) + sav->key_enc = NULL; + } + if (sav->sched) { + bzero(sav->sched, sav->schedlen); + KFREE(sav->sched); + sav->sched = NULL; + } + if (sav->iv != NULL) { KFREE(sav->iv); - if (sav->lft_c != NULL) + sav->iv = NULL; + } + if (sav->lft_c != NULL) { KFREE(sav->lft_c); - if (sav->lft_h != NULL) + sav->lft_c = NULL; + } + if (sav->lft_h != NULL) { KFREE(sav->lft_h); - if (sav->lft_s != NULL) + sav->lft_h = NULL; + } + if (sav->lft_s != NULL) { KFREE(sav->lft_s); -#if notyet - if (sav->misc1 != NULL) - KFREE(sav->misc1); - if (sav->misc2 != NULL) - KFREE(sav->misc2); - if (sav->misc3 != NULL) - KFREE(sav->misc3); -#endif - - msg0->sadb_msg_errno = error; - return 1; -} + sav->lft_s = NULL; + } -/* - * get message buffer length. - */ -static u_int -key_getmsglen(sav) - struct secasvar *sav; -{ - int len = sizeof(struct sadb_msg); - - len += sizeof(struct sadb_sa); - len += (sizeof(struct sadb_address) - + PFKEY_ALIGN8(_SALENBYAF(sav->sah->saidx.src.ss_family))); - len += (sizeof(struct sadb_address) - + PFKEY_ALIGN8(_SALENBYAF(sav->sah->saidx.dst.ss_family))); - - if (sav->key_auth != NULL) - len += sav->key_auth->sadb_key_len; - if (sav->key_enc != NULL) - len += sav->key_enc->sadb_key_len; - - if (sav->lft_c != NULL) - len += sizeof(struct sadb_lifetime); - if (sav->lft_h != NULL) - len += sizeof(struct sadb_lifetime); - if (sav->lft_s != NULL) - len += sizeof(struct sadb_lifetime); - - return len; + return error; } /* @@ -2893,12 +3365,19 @@ key_mature(sav) mature = 0; + lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_OWNED); + /* check SPI value */ - if (ntohl(sav->spi) >= 0 && ntohl(sav->spi) <= 255) { -#if IPSEC_DEBUG - printf("key_mature: illegal range of SPI %d.\n", sav->spi); -#endif - return EINVAL; + switch (sav->sah->saidx.proto) { + case IPPROTO_ESP: + case IPPROTO_AH: + if (ntohl(sav->spi) >= 0 && ntohl(sav->spi) <= 255) { + ipseclog((LOG_DEBUG, + "key_mature: illegal range of SPI %u.\n", + (u_int32_t)ntohl(sav->spi))); + return EINVAL; + } + break; } /* check satype */ @@ -2907,96 +3386,72 @@ key_mature(sav) /* check flags */ if ((sav->flags & SADB_X_EXT_OLD) && (sav->flags & SADB_X_EXT_DERIV)) { -#if IPSEC_DEBUG - printf("key_mature: " - "invalid flag (derived) given to old-esp.\n"); -#endif + ipseclog((LOG_DEBUG, "key_mature: " + "invalid flag (derived) given to old-esp.\n")); return EINVAL; } - checkmask = 3; + if (sav->alg_auth == SADB_AALG_NONE) + checkmask = 1; + else + checkmask = 3; mustmask = 1; break; case IPPROTO_AH: /* check flags */ if (sav->flags & SADB_X_EXT_DERIV) { -#if IPSEC_DEBUG - printf("key_mature: " - "invalid flag (derived) given to AH SA.\n"); -#endif + ipseclog((LOG_DEBUG, "key_mature: " + "invalid flag (derived) given to AH SA.\n")); return EINVAL; } if (sav->alg_enc != SADB_EALG_NONE) { -#if IPSEC_DEBUG - printf("key_mature: " - "protocol and algorithm mismated.\n"); -#endif + ipseclog((LOG_DEBUG, "key_mature: " + "protocol and algorithm mismated.\n")); return(EINVAL); } checkmask = 2; mustmask = 2; break; -#if 1 /*nonstandard*/ case IPPROTO_IPCOMP: if (sav->alg_auth != SADB_AALG_NONE) { -#if IPSEC_DEBUG - printf("key_mature: " - "protocol and algorithm mismated.\n"); -#endif + ipseclog((LOG_DEBUG, "key_mature: " + "protocol and algorithm mismated.\n")); return(EINVAL); } if ((sav->flags & SADB_X_EXT_RAWCPI) == 0 && ntohl(sav->spi) >= 0x10000) { -#if IPSEC_DEBUG - printf("key_mature: invalid cpi for IPComp.\n"); -#endif + ipseclog((LOG_DEBUG, "key_mature: invalid cpi for IPComp.\n")); return(EINVAL); } checkmask = 4; mustmask = 4; break; -#endif default: -#if IPSEC_DEBUG - printf("key_mature: Invalid satype.\n"); -#endif + ipseclog((LOG_DEBUG, "key_mature: Invalid satype.\n")); return EPROTONOSUPPORT; } /* check authentication algorithm */ if ((checkmask & 2) != 0) { - struct ah_algorithm *algo; + const struct ah_algorithm *algo; int keylen; - /* XXX: should use algorithm map to check. */ - switch (sav->alg_auth) { - case SADB_AALG_NONE: - case SADB_AALG_MD5HMAC: - case SADB_AALG_SHA1HMAC: - case SADB_AALG_MD5: - case SADB_AALG_SHA: - case SADB_AALG_NULL: - break; - default: -#if IPSEC_DEBUG - printf("key_mature: " - "unknown authentication algorithm.\n"); -#endif + algo = ah_algorithm_lookup(sav->alg_auth); + if (!algo) { + ipseclog((LOG_DEBUG,"key_mature: " + "unknown authentication algorithm.\n")); return EINVAL; } /* algorithm-dependent check */ - algo = &ah_algorithms[sav->alg_auth]; - if (sav->key_auth) keylen = sav->key_auth->sadb_key_bits; else keylen = 0; if (keylen < algo->keymin || algo->keymax < keylen) { -#if IPSEC_DEBUG - printf("key_mature: invalid AH key length %d " - "(%d-%d allowed)\n", keylen, - algo->keymin, algo->keymax); -#endif + ipseclog((LOG_DEBUG, + "key_mature: invalid AH key length %d " + "(%d-%d allowed)\n", + keylen, algo->keymin, algo->keymax)); return EINVAL; } @@ -3009,9 +3464,7 @@ key_mature(sav) } if ((mustmask & 2) != 0 && mature != SADB_SATYPE_AH) { -#if IPSEC_DEBUG - printf("key_mature: no satisfy algorithm for AH\n"); -#endif + ipseclog((LOG_DEBUG, "key_mature: no satisfy algorithm for AH\n")); return EINVAL; } } @@ -3019,38 +3472,25 @@ key_mature(sav) /* check encryption algorithm */ if ((checkmask & 1) != 0) { #if IPSEC_ESP - struct esp_algorithm *algo; + const struct esp_algorithm *algo; int keylen; - switch (sav->alg_enc) { - case SADB_EALG_NONE: - case SADB_EALG_DESCBC: - case SADB_EALG_3DESCBC: - case SADB_EALG_NULL: - case SADB_EALG_BLOWFISHCBC: - case SADB_EALG_CAST128CBC: - case SADB_EALG_RC5CBC: - break; - default: -#if IPSEC_DEBUG - printf("key_mature: unknown encryption algorithm.\n"); -#endif + algo = esp_algorithm_lookup(sav->alg_enc); + if (!algo) { + ipseclog((LOG_DEBUG, "key_mature: unknown encryption algorithm.\n")); return EINVAL; } /* algorithm-dependent check */ - algo = &esp_algorithms[sav->alg_enc]; - if (sav->key_enc) keylen = sav->key_enc->sadb_key_bits; else keylen = 0; if (keylen < algo->keymin || algo->keymax < keylen) { -#if IPSEC_DEBUG - printf("key_mature: invalid ESP key length %d " - "(%d-%d allowed)\n", keylen, - algo->keymin, algo->keymax); -#endif + ipseclog((LOG_DEBUG, + "key_mature: invalid ESP key length %d " + "(%d-%d allowed)\n", + keylen, algo->keymin, algo->keymax)); return EINVAL; } @@ -3063,44 +3503,23 @@ key_mature(sav) } if ((mustmask & 1) != 0 && mature != SADB_SATYPE_ESP) { -#if IPSEC_DEBUG - printf("key_mature: no satisfy algorithm for ESP\n"); -#endif + ipseclog((LOG_DEBUG, "key_mature: no satisfy algorithm for ESP\n")); return EINVAL; } #else /*IPSEC_ESP*/ -#if IPSEC_DEBUG - printf("key_mature: ESP not supported in this configuration\n"); -#endif + ipseclog((LOG_DEBUG, "key_mature: ESP not supported in this configuration\n")); return EINVAL; #endif } /* check compression algorithm */ if ((checkmask & 4) != 0) { - struct ipcomp_algorithm *algo; - - switch (sav->alg_enc) { - case SADB_X_CALG_NONE: - case SADB_X_CALG_OUI: - case SADB_X_CALG_DEFLATE: - case SADB_X_CALG_LZS: - break; - default: -#if IPSEC_DEBUG - printf("key_mature: unknown compression algorithm.\n"); -#endif - return EINVAL; - } + const struct ipcomp_algorithm *algo; /* algorithm-dependent check */ - algo = &ipcomp_algorithms[sav->alg_enc]; - - if (!(algo->compress && algo->decompress)) { -#if IPSEC_DEBUG - printf("key_mature: " - "unsupported compression algorithm.\n"); -#endif + algo = ipcomp_algorithm_lookup(sav->alg_enc); + if (!algo) { + ipseclog((LOG_DEBUG, "key_mature: unknown compression algorithm.\n")); return EINVAL; } } @@ -3112,148 +3531,187 @@ key_mature(sav) /* * subroutine for SADB_GET and SADB_DUMP. - * the buf must be allocated sufficent space. */ -static u_int -key_setdumpsa(newmsg, sav, type, satype, seq, pid) - struct sadb_msg *newmsg; +static struct mbuf * +key_setdumpsa(sav, type, satype, seq, pid) struct secasvar *sav; u_int8_t type, satype; u_int32_t seq, pid; { - u_int tlen; - caddr_t p; + struct mbuf *result = NULL, *tres = NULL, *m; + int l = 0; int i; + void *p; + int dumporder[] = { + SADB_EXT_SA, SADB_X_EXT_SA2, + SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT, + SADB_EXT_LIFETIME_CURRENT, SADB_EXT_ADDRESS_SRC, + SADB_EXT_ADDRESS_DST, SADB_EXT_ADDRESS_PROXY, SADB_EXT_KEY_AUTH, + SADB_EXT_KEY_ENCRYPT, SADB_EXT_IDENTITY_SRC, + SADB_EXT_IDENTITY_DST, SADB_EXT_SENSITIVITY, + }; + + lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_OWNED); + + m = key_setsadbmsg(type, 0, satype, seq, pid, sav->refcnt); + if (m == NULL) + goto fail; + result = m; - tlen = key_getmsglen(sav); - - p = key_setsadbmsg((caddr_t)newmsg, type, tlen, - satype, seq, pid, - sav->sah->saidx.mode, sav->sah->saidx.reqid, - 0, sav->refcnt); - - for (i = 1; i <= SADB_EXT_MAX; i++) { - switch (i) { + for (i = sizeof(dumporder)/sizeof(dumporder[0]) - 1; i >= 0; i--) { + m = NULL; + p = NULL; + switch (dumporder[i]) { case SADB_EXT_SA: - p = key_setsadbsa(p, sav); + m = key_setsadbsa(sav); + if (!m) + goto fail; + break; + + case SADB_X_EXT_SA2: + m = key_setsadbxsa2(sav->sah->saidx.mode, + sav->replay ? sav->replay->count : 0, + sav->sah->saidx.reqid); + if (!m) + goto fail; break; case SADB_EXT_ADDRESS_SRC: - p = key_setsadbaddr(p, - SADB_EXT_ADDRESS_SRC, - (struct sockaddr *)&sav->sah->saidx.src, - _INALENBYAF(sav->sah->saidx.src.ss_family) << 3, - IPSEC_ULPROTO_ANY); + m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, + (struct sockaddr *)&sav->sah->saidx.src, + FULLMASK, IPSEC_ULPROTO_ANY); + if (!m) + goto fail; break; case SADB_EXT_ADDRESS_DST: - p = key_setsadbaddr(p, - SADB_EXT_ADDRESS_DST, - (struct sockaddr *)&sav->sah->saidx.dst, - _INALENBYAF(sav->sah->saidx.dst.ss_family) << 3, - IPSEC_ULPROTO_ANY); + m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, + (struct sockaddr *)&sav->sah->saidx.dst, + FULLMASK, IPSEC_ULPROTO_ANY); + if (!m) + goto fail; break; case SADB_EXT_KEY_AUTH: - { - u_int len; - if (sav->key_auth == NULL) break; - len = sav->key_auth->sadb_key_len; /* real length */ - bcopy((caddr_t)sav->key_auth, p, len); - ((struct sadb_ext *)p)->sadb_ext_len = PFKEY_UNIT64(len); - p += len; - } + if (!sav->key_auth) + continue; + l = PFKEY_UNUNIT64(sav->key_auth->sadb_key_len); + p = sav->key_auth; break; case SADB_EXT_KEY_ENCRYPT: - { - u_int len; - if (sav->key_enc == NULL) break; - len = sav->key_enc->sadb_key_len; /* real length */ - bcopy((caddr_t)sav->key_enc, p, len); - ((struct sadb_ext *)p)->sadb_ext_len = PFKEY_UNIT64(len); - p += len; - } - break;; + if (!sav->key_enc) + continue; + l = PFKEY_UNUNIT64(sav->key_enc->sadb_key_len); + p = sav->key_enc; + break; case SADB_EXT_LIFETIME_CURRENT: - if (sav->lft_c == NULL) break; - p = key_setsadbext(p, (caddr_t)sav->lft_c); + if (!sav->lft_c) + continue; + l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_c)->sadb_ext_len); + p = sav->lft_c; break; case SADB_EXT_LIFETIME_HARD: - if (sav->lft_h == NULL) break; - p = key_setsadbext(p, (caddr_t)sav->lft_h); + if (!sav->lft_h) + continue; + l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_h)->sadb_ext_len); + p = sav->lft_h; break; case SADB_EXT_LIFETIME_SOFT: - if (sav->lft_s == NULL) break; - p = key_setsadbext(p, (caddr_t)sav->lft_s); + if (!sav->lft_s) + continue; + l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_s)->sadb_ext_len); + p = sav->lft_s; break; + case SADB_EXT_ADDRESS_PROXY: case SADB_EXT_IDENTITY_SRC: case SADB_EXT_IDENTITY_DST: /* XXX: should we brought from SPD ? */ case SADB_EXT_SENSITIVITY: default: - break; + continue; } + + if ((!m && !p) || (m && p)) + goto fail; + if (p && tres) { + M_PREPEND(tres, l, M_DONTWAIT); + if (!tres) + goto fail; + bcopy(p, mtod(tres, caddr_t), l); + continue; + } + if (p) { + m = key_alloc_mbuf(l); + if (!m) + goto fail; + m_copyback(m, 0, l, p); + } + + if (tres) + m_cat(m, tres); + tres = m; } - return tlen; -} + m_cat(result, tres); -#if 1 -static int -key_setsadbmsg_m(m, type, tlen, satype, seq, pid, mode, reqid, - reserved1, reserved2) - struct mbuf *m; - u_int8_t type, satype; - u_int16_t tlen; - u_int32_t seq; - pid_t pid; - u_int8_t mode; - u_int32_t reqid; - u_int8_t reserved1; - u_int32_t reserved2; -{ - caddr_t p; - const size_t len = sizeof(struct sadb_msg); + if (result->m_len < sizeof(struct sadb_msg)) { + result = m_pullup(result, sizeof(struct sadb_msg)); + if (result == NULL) + goto fail; + } - p = key_appendmbuf(m, len); - if (p == NULL) - return ENOBUFS; + result->m_pkthdr.len = 0; + for (m = result; m; m = m->m_next) + result->m_pkthdr.len += m->m_len; - if (key_setsadbmsg(p, type, tlen, satype, seq, pid, mode, reqid, - reserved1, reserved2)) - return 0; - else - return EINVAL; + mtod(result, struct sadb_msg *)->sadb_msg_len = + PFKEY_UNIT64(result->m_pkthdr.len); + + return result; + +fail: + m_freem(result); + m_freem(tres); + return NULL; } -#endif /* * set data into sadb_msg. - * `buf' must has been allocated sufficiently. */ -static caddr_t -key_setsadbmsg(buf, type, tlen, satype, seq, pid, mode, reqid, - reserved1, reserved2) - caddr_t buf; +static struct mbuf * +key_setsadbmsg(type, tlen, satype, seq, pid, reserved) u_int8_t type, satype; u_int16_t tlen; u_int32_t seq; pid_t pid; - u_int8_t mode; - u_int32_t reqid; - u_int8_t reserved1; - u_int32_t reserved2; + u_int16_t reserved; { + struct mbuf *m; struct sadb_msg *p; - u_int len; + int len; + + len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); + if (len > MCLBYTES) + return NULL; + MGETHDR(m, M_DONTWAIT, MT_DATA); + if (m && len > MHLEN) { + MCLGET(m, M_DONTWAIT); + if ((m->m_flags & M_EXT) == 0) { + m_freem(m); + m = NULL; + } + } + if (!m) + return NULL; + m->m_pkthdr.len = m->m_len = len; + m->m_next = NULL; - p = (struct sadb_msg *)buf; - len = sizeof(struct sadb_msg); + p = mtod(m, struct sadb_msg *); bzero(p, len); p->sadb_msg_version = PF_KEY_V2; @@ -3261,30 +3719,33 @@ key_setsadbmsg(buf, type, tlen, satype, seq, pid, mode, reqid, p->sadb_msg_errno = 0; p->sadb_msg_satype = satype; p->sadb_msg_len = PFKEY_UNIT64(tlen); - p->sadb_msg_mode = mode; - p->sadb_msg_reserved1 = reserved1; + p->sadb_msg_reserved = reserved; p->sadb_msg_seq = seq; p->sadb_msg_pid = (u_int32_t)pid; - p->sadb_msg_reqid = reqid; - p->sadb_msg_reserved2 = reserved2; - return(buf + len); + return m; } /* * copy secasvar data into sadb_address. - * `buf' must has been allocated sufficiently. */ -static caddr_t -key_setsadbsa(buf, sav) - caddr_t buf; +static struct mbuf * +key_setsadbsa(sav) struct secasvar *sav; { + struct mbuf *m; struct sadb_sa *p; - u_int len; + int len; + + len = PFKEY_ALIGN8(sizeof(struct sadb_sa)); + m = key_alloc_mbuf(len); + if (!m || m->m_next) { /*XXX*/ + if (m) + m_freem(m); + return NULL; + } - p = (struct sadb_sa *)buf; - len = sizeof(struct sadb_sa); + p = mtod(m, struct sadb_sa *); bzero(p, len); p->sadb_sa_len = PFKEY_UNIT64(len); @@ -3296,80 +3757,84 @@ key_setsadbsa(buf, sav) p->sadb_sa_encrypt = sav->alg_enc; p->sadb_sa_flags = sav->flags; - return(buf + len); -} - -#if 1 -static int -key_setsadbaddr_m(m, exttype, saddr, prefixlen, ul_proto) - struct mbuf *m; - u_int16_t exttype; - struct sockaddr *saddr; - u_int8_t prefixlen; - u_int16_t ul_proto; -{ - caddr_t p; - const size_t len = - sizeof(struct sadb_address) + PFKEY_ALIGN8(saddr->sa_len); - - p = key_appendmbuf(m, len); - if (p == NULL) - return ENOBUFS; - - if (key_setsadbaddr(p, exttype, saddr, prefixlen, ul_proto)) - return 0; - else - return EINVAL; + return m; } -#endif /* * set data into sadb_address. - * `buf' must has been allocated sufficiently. */ -static caddr_t -key_setsadbaddr(buf, exttype, saddr, prefixlen, ul_proto) - caddr_t buf; +static struct mbuf * +key_setsadbaddr(exttype, saddr, prefixlen, ul_proto) u_int16_t exttype; struct sockaddr *saddr; u_int8_t prefixlen; u_int16_t ul_proto; { + struct mbuf *m; struct sadb_address *p; size_t len; - p = (struct sadb_address *)buf; - len = sizeof(struct sadb_address) + PFKEY_ALIGN8(saddr->sa_len); + len = PFKEY_ALIGN8(sizeof(struct sadb_address)) + + PFKEY_ALIGN8(saddr->sa_len); + m = key_alloc_mbuf(len); + if (!m || m->m_next) { /*XXX*/ + if (m) + m_freem(m); + return NULL; + } + + p = mtod(m, struct sadb_address *); bzero(p, len); p->sadb_address_len = PFKEY_UNIT64(len); p->sadb_address_exttype = exttype; p->sadb_address_proto = ul_proto; + if (prefixlen == FULLMASK) { + switch (saddr->sa_family) { + case AF_INET: + prefixlen = sizeof(struct in_addr) << 3; + break; + case AF_INET6: + prefixlen = sizeof(struct in6_addr) << 3; + break; + default: + ; /*XXX*/ + } + } p->sadb_address_prefixlen = prefixlen; p->sadb_address_reserved = 0; - bcopy(saddr, p + 1, saddr->sa_len); + bcopy(saddr, + mtod(m, caddr_t) + PFKEY_ALIGN8(sizeof(struct sadb_address)), + saddr->sa_len); - return(buf + len); + return m; } +#if 0 /* * set data into sadb_ident. - * `buf' must has been allocated sufficiently. */ -static caddr_t -key_setsadbident(buf, exttype, idtype, string, stringlen, id) - caddr_t buf; +static struct mbuf * +key_setsadbident(exttype, idtype, string, stringlen, id) u_int16_t exttype, idtype; caddr_t string; int stringlen; u_int64_t id; { + struct mbuf *m; struct sadb_ident *p; - u_int len; + size_t len; + + len = PFKEY_ALIGN8(sizeof(struct sadb_ident)) + PFKEY_ALIGN8(stringlen); + m = key_alloc_mbuf(len); + if (!m || m->m_next) { /*XXX*/ + if (m) + m_freem(m); + return NULL; + } - p = (struct sadb_ident *)buf; - len = sizeof(struct sadb_ident) + PFKEY_ALIGN8(stringlen); + p = mtod(m, struct sadb_ident *); bzero(p, len); p->sadb_ident_len = PFKEY_UNIT64(len); @@ -3378,27 +3843,70 @@ key_setsadbident(buf, exttype, idtype, string, stringlen, id) p->sadb_ident_reserved = 0; p->sadb_ident_id = id; - bcopy(string, p + 1, stringlen); + bcopy(string, + mtod(m, caddr_t) + PFKEY_ALIGN8(sizeof(struct sadb_ident)), + stringlen); + + return m; +} +#endif + +/* + * set data into sadb_x_sa2. + */ +static struct mbuf * +key_setsadbxsa2(mode, seq, reqid) + u_int8_t mode; + u_int32_t seq, reqid; +{ + struct mbuf *m; + struct sadb_x_sa2 *p; + size_t len; + + len = PFKEY_ALIGN8(sizeof(struct sadb_x_sa2)); + m = key_alloc_mbuf(len); + if (!m || m->m_next) { /*XXX*/ + if (m) + m_freem(m); + return NULL; + } + + p = mtod(m, struct sadb_x_sa2 *); - return(buf + len); + bzero(p, len); + p->sadb_x_sa2_len = PFKEY_UNIT64(len); + p->sadb_x_sa2_exttype = SADB_X_EXT_SA2; + p->sadb_x_sa2_mode = mode; + p->sadb_x_sa2_reserved1 = 0; + p->sadb_x_sa2_reserved2 = 0; + p->sadb_x_sa2_sequence = seq; + p->sadb_x_sa2_reqid = reqid; + + return m; } /* * set data into sadb_x_policy - * `buf' must has been allocated sufficiently. */ -static caddr_t -key_setsadbxpolicy(buf, type, dir, id) - caddr_t buf; +static struct mbuf * +key_setsadbxpolicy(type, dir, id) u_int16_t type; u_int8_t dir; u_int32_t id; { + struct mbuf *m; struct sadb_x_policy *p; - u_int len; + size_t len; + + len = PFKEY_ALIGN8(sizeof(struct sadb_x_policy)); + m = key_alloc_mbuf(len); + if (!m || m->m_next) { /*XXX*/ + if (m) + m_freem(m); + return NULL; + } - p = (struct sadb_x_policy *)buf; - len = sizeof(struct sadb_x_policy); + p = mtod(m, struct sadb_x_policy *); bzero(p, len); p->sadb_x_policy_len = PFKEY_UNIT64(len); @@ -3407,25 +3915,7 @@ key_setsadbxpolicy(buf, type, dir, id) p->sadb_x_policy_dir = dir; p->sadb_x_policy_id = id; - return(buf + len); -} - -/* - * copy buffer of any sadb extension type into sadb_ext. - * assume that sadb_ext_len shifted down >> 3. - * i.e. shift length up when setting length of extension. - */ -static caddr_t -key_setsadbext(p, ext) - caddr_t p, ext; -{ - u_int len; - - len = PFKEY_UNUNIT64(((struct sadb_ext *)ext)->sadb_ext_len); - - bcopy(ext, p, len); - - return(p + len); + return m; } /* %%% utilities */ @@ -3434,19 +3924,17 @@ key_setsadbext(p, ext) */ static void * key_newbuf(src, len) - void *src; + const void *src; u_int len; { caddr_t new; KMALLOC(new, caddr_t, len); if (new == NULL) { -#if IPSEC_DEBUG - printf("key_newbuf: No more memory.\n"); -#endif + ipseclog((LOG_DEBUG, "key_newbuf: No more memory.\n")); return NULL; } - bcopy((caddr_t)src, new, len); + bcopy(src, new, len); return new; } @@ -3456,36 +3944,40 @@ key_newbuf(src, len) * 0: false */ int -key_ismyaddr(family, addr) - u_int family; - caddr_t addr; +key_ismyaddr(sa) + struct sockaddr *sa; { +#if INET + struct sockaddr_in *sin; + struct in_ifaddr *ia; +#endif + /* sanity check */ - if (addr == NULL) + if (sa == NULL) panic("key_ismyaddr: NULL pointer is passed.\n"); - switch (family) { + switch (sa->sa_family) { +#if INET case AF_INET: - { - struct in_ifaddr *ia; - -#ifdef __NetBSD__ - for (ia = in_ifaddr.tqh_first; ia; ia = ia->ia_list.tqe_next) -#elif defined(__FreeBSD__) && __FreeBSD__ >= 3 || defined (__APPLE__) + lck_mtx_lock(rt_mtx); + sin = (struct sockaddr_in *)sa; for (ia = in_ifaddrhead.tqh_first; ia; ia = ia->ia_link.tqe_next) -#else - for (ia = in_ifaddr; ia; ia = ia->ia_next) -#endif - if (bcmp(addr, - (caddr_t)&ia->ia_addr.sin_addr, - _INALENBYAF(family)) == 0) + { + if (sin->sin_family == ia->ia_addr.sin_family && + sin->sin_len == ia->ia_addr.sin_len && + sin->sin_addr.s_addr == ia->ia_addr.sin_addr.s_addr) + { + lck_mtx_unlock(rt_mtx); return 1; - } + } + } + lck_mtx_unlock(rt_mtx); break; +#endif #if INET6 case AF_INET6: - return key_ismyaddr6(addr); + return key_ismyaddr6((struct sockaddr_in6 *)sa); #endif } @@ -3502,132 +3994,59 @@ key_ismyaddr(family, addr) #include static int -key_ismyaddr6(addr) - caddr_t addr; +key_ismyaddr6(sin6) + struct sockaddr_in6 *sin6; { - struct in6_addr *a = (struct in6_addr *)addr; struct in6_ifaddr *ia; + struct in6_multi *in6m; - for (ia = in6_ifaddr; ia; ia = ia->ia_next) { - if (bcmp(addr, (caddr_t)&ia->ia_addr.sin6_addr, - _INALENBYAF(AF_INET6)) == 0) { + lck_mtx_lock(nd6_mutex); + for (ia = in6_ifaddrs; ia; ia = ia->ia_next) { + if (key_sockaddrcmp((struct sockaddr *)&sin6, + (struct sockaddr *)&ia->ia_addr, 0) == 0) { + lck_mtx_unlock(nd6_mutex); return 1; } - /* XXX Multicast */ - { - struct in6_multi *in6m = 0; - -#if defined(__FreeBSD__) && __FreeBSD__ >= 3 || defined (__APPLE__) - IN6_LOOKUP_MULTI(*(struct in6_addr *)addr, ia->ia_ifp, in6m); -#else - for ((in6m) = ia->ia6_multiaddrs.lh_first; - (in6m) != NULL && - !IN6_ARE_ADDR_EQUAL(&(in6m)->in6m_addr, a); - (in6m) = in6m->in6m_entry.le_next) - continue; -#endif - if (in6m) + /* + * XXX Multicast + * XXX why do we care about multlicast here while we don't care + * about IPv4 multicast?? + * XXX scope + */ + in6m = NULL; + IN6_LOOKUP_MULTI(sin6->sin6_addr, ia->ia_ifp, in6m); + if (in6m) { + lck_mtx_unlock(nd6_mutex); return 1; - } + } } + lck_mtx_unlock(nd6_mutex); /* loopback, just for safety */ - if (IN6_IS_ADDR_LOOPBACK(a)) - return 1; - -#if 0 - /* FAITH */ - if (ip6_keepfaith && - (a->s6_addr32[0] == ip6_faith_prefix.s6_addr32[0] && - a->s6_addr32[1] == ip6_faith_prefix.s6_addr32[1] && - a->s6_addr32[2] == ip6_faith_prefix.s6_addr32[2])) + if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr)) return 1; -#endif - - /* XXX anycast */ return 0; } #endif /*INET6*/ -#if 0 -/* checking address is whether loopback or not. - * OUT: 1: true - * 0: false - */ -static int -key_isloopback(family, addr) - u_int family; - caddr_t addr; -{ - switch (family) { - case PF_INET: - if (((caddr_t)addr)[0] == IN_LOOPBACKNET) - return 1; - break; -#if INET6 - case PF_INET6: - if (IN6_IS_ADDR_LOOPBACK((struct in6_addr *)addr)) - return 1; - break; -#endif /* INET6 */ - default: -#if IPSEC_DEBUG - printf("key_isloopback: unknown address family=%d.\n", family); -#endif - return 0; - } - - return 0; -} -#endif - -/* - * compare two secasindex structure exactly. - * IN: - * saidx0: source, it can be in SAD. - * saidx1: object. - * OUT: - * 1 : equal - * 0 : not equal - */ -static int -key_cmpsaidx_exactly(saidx0, saidx1) - struct secasindex *saidx0, *saidx1; -{ - /* sanity */ - if (saidx0 == NULL && saidx1 == NULL) - return 1; - - if (saidx0 == NULL || saidx1 == NULL) - return 0; - - if (saidx0->proto != saidx1->proto - || saidx0->mode != saidx1->mode - || saidx0->reqid != saidx1->reqid) - return 0; - - if (bcmp(&saidx0->src, &saidx1->src, saidx0->src.ss_len) != 0 - || bcmp(&saidx0->dst, &saidx1->dst, saidx0->dst.ss_len) != 0) - return 0; - - return 1; -} - /* - * compare two secasindex structure with consideration mode. + * compare two secasindex structure. + * flag can specify to compare 2 saidxes. + * compare two secasindex structure without both mode and reqid. * don't compare port. - * IN: - * saidx0: source, it is often in SAD. - * saidx1: object, it is often from SPD. - * OUT: - * 1 : equal - * 0 : not equal + * IN: + * saidx0: source, it can be in SAD. + * saidx1: object. + * OUT: + * 1 : equal + * 0 : not equal */ static int -key_cmpsaidx_withmode(saidx0, saidx1) +key_cmpsaidx(saidx0, saidx1, flag) struct secasindex *saidx0, *saidx1; + int flag; { /* sanity */ if (saidx0 == NULL && saidx1 == NULL) @@ -3636,30 +4055,45 @@ key_cmpsaidx_withmode(saidx0, saidx1) if (saidx0 == NULL || saidx1 == NULL) return 0; - if (saidx0->proto != saidx1->proto - || saidx0->src.ss_family != saidx1->src.ss_family - || saidx0->dst.ss_family != saidx1->dst.ss_family) + if (saidx0->proto != saidx1->proto) return 0; - /* - * If reqid of SPD is non-zero, unique SA is required. - * The result must be of same reqid in this case. - */ - if (saidx1->reqid != 0 - && saidx0->reqid != saidx1->reqid) - return 0; + if (flag == CMP_EXACTLY) { + if (saidx0->mode != saidx1->mode) + return 0; + if (saidx0->reqid != saidx1->reqid) + return 0; + if (bcmp(&saidx0->src, &saidx1->src, saidx0->src.ss_len) != 0 || + bcmp(&saidx0->dst, &saidx1->dst, saidx0->dst.ss_len) != 0) + return 0; + } else { - if (saidx0->mode != IPSEC_MODE_ANY - && saidx0->mode != saidx1->mode) - return 0; + /* CMP_MODE_REQID, CMP_REQID, CMP_HEAD */ + if (flag == CMP_MODE_REQID + ||flag == CMP_REQID) { + /* + * If reqid of SPD is non-zero, unique SA is required. + * The result must be of same reqid in this case. + */ + if (saidx1->reqid != 0 && saidx0->reqid != saidx1->reqid) + return 0; + } - { - int sa_len = _INALENBYAF(saidx0->src.ss_family); + if (flag == CMP_MODE_REQID) { + if (saidx0->mode != IPSEC_MODE_ANY + && saidx0->mode != saidx1->mode) + return 0; + } - if (bcmp(_INADDRBYSA(&saidx0->src), _INADDRBYSA(&saidx1->src), sa_len) - || bcmp(_INADDRBYSA(&saidx0->dst), _INADDRBYSA(&saidx1->dst), sa_len)) - return 0; - } + if (key_sockaddrcmp((struct sockaddr *)&saidx0->src, + (struct sockaddr *)&saidx1->src, 0) != 0) { + return 0; + } + if (key_sockaddrcmp((struct sockaddr *)&saidx0->dst, + (struct sockaddr *)&saidx1->dst, 0) != 0) { + return 0; + } + } return 1; } @@ -3689,9 +4123,14 @@ key_cmpspidx_exactly(spidx0, spidx1) || spidx0->ul_proto != spidx1->ul_proto) return 0; - if (bcmp(&spidx0->src, &spidx1->src, spidx0->src.ss_len) != 0 - || bcmp(&spidx0->dst, &spidx1->dst, spidx0->dst.ss_len) != 0) + if (key_sockaddrcmp((struct sockaddr *)&spidx0->src, + (struct sockaddr *)&spidx1->src, 1) != 0) { + return 0; + } + if (key_sockaddrcmp((struct sockaddr *)&spidx0->dst, + (struct sockaddr *)&spidx1->dst, 1) != 0) { return 0; + } return 1; } @@ -3716,8 +4155,10 @@ key_cmpspidx_withmask(spidx0, spidx1) if (spidx0 == NULL || spidx1 == NULL) return 0; - if (spidx0->src.ss_family != spidx1->src.ss_family - || spidx0->dst.ss_family != spidx1->dst.ss_family) + if (spidx0->src.ss_family != spidx1->src.ss_family || + spidx0->dst.ss_family != spidx1->dst.ss_family || + spidx0->src.ss_len != spidx1->src.ss_len || + spidx0->dst.ss_len != spidx1->dst.ss_len) return 0; /* if spidx.ul_proto == IPSEC_ULPROTO_ANY, ignore. */ @@ -3725,27 +4166,124 @@ key_cmpspidx_withmask(spidx0, spidx1) && spidx0->ul_proto != spidx1->ul_proto) return 0; - if (_INPORTBYSA(&spidx0->src) != IPSEC_PORT_ANY - && _INPORTBYSA(&spidx0->src) != _INPORTBYSA(&spidx1->src)) - return 0; - - if (_INPORTBYSA(&spidx0->dst) != IPSEC_PORT_ANY - && _INPORTBYSA(&spidx0->dst) != _INPORTBYSA(&spidx1->dst)) - return 0; - - if (!key_bbcmp(_INADDRBYSA(&spidx0->src), - _INADDRBYSA(&spidx1->src), - spidx0->prefs)) - return 0; - - if (!key_bbcmp(_INADDRBYSA(&spidx0->dst), - _INADDRBYSA(&spidx1->dst), - spidx0->prefd)) - return 0; - - /* XXX Do we check other field ? e.g. flowinfo, scope_id. */ - - return 1; + switch (spidx0->src.ss_family) { + case AF_INET: + if (satosin(&spidx0->src)->sin_port != IPSEC_PORT_ANY + && satosin(&spidx0->src)->sin_port != + satosin(&spidx1->src)->sin_port) + return 0; + if (!key_bbcmp((caddr_t)&satosin(&spidx0->src)->sin_addr, + (caddr_t)&satosin(&spidx1->src)->sin_addr, spidx0->prefs)) + return 0; + break; + case AF_INET6: + if (satosin6(&spidx0->src)->sin6_port != IPSEC_PORT_ANY + && satosin6(&spidx0->src)->sin6_port != + satosin6(&spidx1->src)->sin6_port) + return 0; + /* + * scope_id check. if sin6_scope_id is 0, we regard it + * as a wildcard scope, which matches any scope zone ID. + */ + if (satosin6(&spidx0->src)->sin6_scope_id && + satosin6(&spidx1->src)->sin6_scope_id && + satosin6(&spidx0->src)->sin6_scope_id != + satosin6(&spidx1->src)->sin6_scope_id) + return 0; + if (!key_bbcmp((caddr_t)&satosin6(&spidx0->src)->sin6_addr, + (caddr_t)&satosin6(&spidx1->src)->sin6_addr, spidx0->prefs)) + return 0; + break; + default: + /* XXX */ + if (bcmp(&spidx0->src, &spidx1->src, spidx0->src.ss_len) != 0) + return 0; + break; + } + + switch (spidx0->dst.ss_family) { + case AF_INET: + if (satosin(&spidx0->dst)->sin_port != IPSEC_PORT_ANY + && satosin(&spidx0->dst)->sin_port != + satosin(&spidx1->dst)->sin_port) + return 0; + if (!key_bbcmp((caddr_t)&satosin(&spidx0->dst)->sin_addr, + (caddr_t)&satosin(&spidx1->dst)->sin_addr, spidx0->prefd)) + return 0; + break; + case AF_INET6: + if (satosin6(&spidx0->dst)->sin6_port != IPSEC_PORT_ANY + && satosin6(&spidx0->dst)->sin6_port != + satosin6(&spidx1->dst)->sin6_port) + return 0; + /* + * scope_id check. if sin6_scope_id is 0, we regard it + * as a wildcard scope, which matches any scope zone ID. + */ + if (satosin6(&spidx0->src)->sin6_scope_id && + satosin6(&spidx1->src)->sin6_scope_id && + satosin6(&spidx0->dst)->sin6_scope_id != + satosin6(&spidx1->dst)->sin6_scope_id) + return 0; + if (!key_bbcmp((caddr_t)&satosin6(&spidx0->dst)->sin6_addr, + (caddr_t)&satosin6(&spidx1->dst)->sin6_addr, spidx0->prefd)) + return 0; + break; + default: + /* XXX */ + if (bcmp(&spidx0->dst, &spidx1->dst, spidx0->dst.ss_len) != 0) + return 0; + break; + } + + /* XXX Do we check other field ? e.g. flowinfo */ + + return 1; +} + +/* returns 0 on match */ +static int +key_sockaddrcmp(sa1, sa2, port) + struct sockaddr *sa1; + struct sockaddr *sa2; + int port; +{ + if (sa1->sa_family != sa2->sa_family || sa1->sa_len != sa2->sa_len) + return 1; + + switch (sa1->sa_family) { + case AF_INET: + if (sa1->sa_len != sizeof(struct sockaddr_in)) + return 1; + if (satosin(sa1)->sin_addr.s_addr != + satosin(sa2)->sin_addr.s_addr) { + return 1; + } + if (port && satosin(sa1)->sin_port != satosin(sa2)->sin_port) + return 1; + break; + case AF_INET6: + if (sa1->sa_len != sizeof(struct sockaddr_in6)) + return 1; /*EINVAL*/ + if (satosin6(sa1)->sin6_scope_id != + satosin6(sa2)->sin6_scope_id) { + return 1; + } + if (!IN6_ARE_ADDR_EQUAL(&satosin6(sa1)->sin6_addr, + &satosin6(sa2)->sin6_addr)) { + return 1; + } + if (port && + satosin6(sa1)->sin6_port != satosin6(sa2)->sin6_port) { + return 1; + } + default: + if (bcmp(sa1, sa2, sa1->sa_len) != 0) + return 1; + break; + } + + return 0; } /* @@ -3760,8 +4298,8 @@ key_cmpspidx_withmask(spidx0, spidx1) */ static int key_bbcmp(p1, p2, bits) - register caddr_t p1, p2; - register u_int bits; + caddr_t p1, p2; + u_int bits; { u_int8_t mask; @@ -3790,20 +4328,19 @@ key_bbcmp(p1, p2, bits) * time handler. * scanning SPD and SAD to check status for each entries, * and do to remove or to expire. + * XXX: year 2038 problem may remain. */ + void key_timehandler(void) { u_int dir; int s; + struct timeval tv; - thread_funnel_set(network_flock, TRUE); -#if __NetBSD__ - s = splsoftnet(); /*called from softclock()*/ -#else - s = splnet(); /*called from softclock()*/ -#endif + microtime(&tv); + lck_mtx_lock(sadb_mutex); /* SPD */ { struct secpolicy *sp, *nextsp; @@ -3815,8 +4352,23 @@ key_timehandler(void) nextsp = LIST_NEXT(sp, chain); - if (sp->state == IPSEC_SPSTATE_DEAD) + if (sp->state == IPSEC_SPSTATE_DEAD) { key_freesp(sp); + continue; + } + + if (sp->lifetime == 0 && sp->validtime == 0) + continue; + + /* the deletion will occur next time */ + if ((sp->lifetime + && tv.tv_sec - sp->created > sp->lifetime) + || (sp->validtime + && tv.tv_sec - sp->lastused > sp->validtime)) { + sp->state = IPSEC_SPSTATE_DEAD; + key_spdexpire(sp); + continue; + } } } } @@ -3845,13 +4397,27 @@ key_timehandler(void) nextsav = LIST_NEXT(sav, chain); - sav->tick++; - - if (key_larval_lifetime < sav->tick) { + if (tv.tv_sec - sav->created > key_larval_lifetime) { key_freesav(sav); } } - + + /* + * If this is a NAT traversal SA with no activity, + * we need to send a keep alive. + * + * Performed outside of the loop before so we will + * only ever send one keepalive. The first SA on + * the list is the one that will be used for sending + * traffic, so this is the one we use for determining + * when to send the keepalive. + */ + sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_MATURE]); + if (natt_keepalive_interval && sav && (sav->flags & SADB_X_EXT_NATT_KEEPALIVE) != 0 && + (natt_now - sav->natt_last_activity) >= natt_keepalive_interval) { + ipsec_send_natt_keepalive(sav); + } + /* * check MATURE entry to start to send expire message * whether or not. @@ -3862,27 +4428,24 @@ key_timehandler(void) nextsav = LIST_NEXT(sav, chain); - sav->tick++; - /* we don't need to check. */ if (sav->lft_s == NULL) continue; /* sanity check */ if (sav->lft_c == NULL) { -#if IPSEC_DEBUG - printf("key_timehandler: " - "There is no CURRENT time, why?\n"); -#endif + ipseclog((LOG_DEBUG,"key_timehandler: " + "There is no CURRENT time, why?\n")); continue; } - /* compare SOFT lifetime and tick */ + /* check SOFT lifetime */ if (sav->lft_s->sadb_lifetime_addtime != 0 - && sav->lft_s->sadb_lifetime_addtime < sav->tick) { + && tv.tv_sec - sav->created > sav->lft_s->sadb_lifetime_addtime) { /* - * check SA to be used whether or not. - * when SA hasn't been used, delete it. + * check the SA if it has been used. + * when it hasn't been used, delete it. + * i don't think such SA will be used. */ if (sav->lft_c->sadb_lifetime_usetime == 0) { key_sa_chgstate(sav, SADB_SASTATE_DEAD); @@ -3898,6 +4461,7 @@ key_timehandler(void) key_expire(sav); } } + /* check SOFT lifetime by bytes */ /* * XXX I don't know the way to delete this SA @@ -3924,24 +4488,19 @@ key_timehandler(void) nextsav = LIST_NEXT(sav, chain); - sav->tick++; - /* we don't need to check. */ if (sav->lft_h == NULL) continue; /* sanity check */ if (sav->lft_c == NULL) { -#if IPSEC_DEBUG - printf("key_timehandler: " - "There is no CURRENT time, why?\n"); -#endif + ipseclog((LOG_DEBUG, "key_timehandler: " + "There is no CURRENT time, why?\n")); continue; } - /* compare HARD lifetime and tick */ if (sav->lft_h->sadb_lifetime_addtime != 0 - && sav->lft_h->sadb_lifetime_addtime < sav->tick) { + && tv.tv_sec - sav->created > sav->lft_h->sadb_lifetime_addtime) { key_sa_chgstate(sav, SADB_SASTATE_DEAD); key_freesav(sav); sav = NULL; @@ -3949,7 +4508,7 @@ key_timehandler(void) #if 0 /* XXX Should we keep to send expire message until HARD lifetime ? */ else if (sav->lft_s != NULL && sav->lft_s->sadb_lifetime_addtime != 0 - && sav->lft_s->sadb_lifetime_addtime < sav->tick) { + && tv.tv_sec - sav->created > sav->lft_s->sadb_lifetime_addtime) { /* * XXX: should be checked to be * installed the valid SA. @@ -3980,13 +4539,11 @@ key_timehandler(void) /* sanity check */ if (sav->state != SADB_SASTATE_DEAD) { -#if IPSEC_DEBUG - printf("key_timehandler: " + ipseclog((LOG_DEBUG, "key_timehandler: " "invalid sav->state " "(queue: %d SA: %d): " "kill it anyway\n", - SADB_SASTATE_DEAD, sav->state); -#endif + SADB_SASTATE_DEAD, sav->state)); } /* @@ -4010,9 +4567,8 @@ key_timehandler(void) nextacq = LIST_NEXT(acq, chain); - acq->tick++; - - if (key_blockacq_lifetime < acq->tick && __LIST_CHAINED(acq)) { + if (tv.tv_sec - acq->created > key_blockacq_lifetime + && __LIST_CHAINED(acq)) { LIST_REMOVE(acq, chain); KFREE(acq); } @@ -4030,9 +4586,8 @@ key_timehandler(void) nextacq = LIST_NEXT(acq, chain); - acq->tick++; - - if (key_blockacq_lifetime < acq->tick && __LIST_CHAINED(acq)) { + if (tv.tv_sec - acq->created > key_blockacq_lifetime + && __LIST_CHAINED(acq)) { LIST_REMOVE(acq, chain); KFREE(acq); } @@ -4044,43 +4599,77 @@ key_timehandler(void) key_tick_init_random = 0; key_srandom(); } + + natt_now++; + lck_mtx_unlock(sadb_mutex); #ifndef IPSEC_DEBUG2 /* do exchange to tick time !! */ - (void)timeout((void *)key_timehandler, (void *)0, 100); + (void)timeout((void *)key_timehandler, (void *)0, hz); #endif /* IPSEC_DEBUG2 */ - splx(s); - thread_funnel_set(network_funnel, FALSE); return; } /* * to initialize a seed for random() */ -void +static void key_srandom() { +#ifdef __APPLE__ + /* Our PRNG is based on Yarrow and doesn't need to be seeded */ + random(); +#else struct timeval tv; -#ifdef __bsdi__ - extern long randseed; /* it's defined at i386/i386/random.s */ -#endif /* __bsdi__ */ microtime(&tv); -#if defined(__FreeBSD__) srandom(tv.tv_usec); -#endif /* __FreeBSD__ */ -#if defined(__APPLE__) - random(); #endif -#ifdef __bsdi__ - randseed = tv.tv_usec; -#endif /* __bsdi__ */ return; } +u_long +key_random() +{ + u_long value; + + key_randomfill(&value, sizeof(value)); + return value; +} + +void +key_randomfill(p, l) + void *p; + size_t l; +{ + size_t n; + u_long v; + static int warn = 1; +#ifdef __APPLE__ + + read_random(p, (u_int)l); +#else + n = 0; + n = (size_t)read_random(p, (u_int)l); + /* last resort */ + while (n < l) { + v = random(); + bcopy(&v, (u_int8_t *)p + n, + l - n < sizeof(v) ? l - n : sizeof(v)); + n += sizeof(v); + + if (warn) { + printf("WARNING: pseudo-random number generator " + "used for IPsec processing\n"); + warn = 0; + } + } +#endif +} + /* * map SADB_SATYPE_* to IPPROTO_*. * if satype == SADB_SATYPE then satype is mapped to ~0. @@ -4098,11 +4687,9 @@ key_satype2proto(satype) return IPPROTO_AH; case SADB_SATYPE_ESP: return IPPROTO_ESP; -#if 1 /*nonstandard*/ case SADB_X_SATYPE_IPCOMP: return IPPROTO_IPCOMP; break; -#endif default: return 0; } @@ -4123,11 +4710,9 @@ key_proto2satype(proto) return SADB_SATYPE_AH; case IPPROTO_ESP: return SADB_SATYPE_ESP; -#if 1 /*nonstandard*/ case IPPROTO_IPCOMP: return SADB_X_SATYPE_IPCOMP; break; -#endif default: return 0; } @@ -4137,7 +4722,7 @@ key_proto2satype(proto) /* %%% PF_KEY */ /* * SADB_GETSPI processing is to receive - * + * * from the IKMPd, to assign a unique spi value, to hang on the INBOUND * tree with the status of LARVAL, and send * @@ -4147,130 +4732,198 @@ key_proto2satype(proto) * OUT: NULL if fail. * other if success, return pointer to the message to send. */ -static struct sadb_msg * -key_getspi(mhp) - caddr_t *mhp; +static int +key_getspi(so, m, mhp) + struct socket *so; + struct mbuf *m; + const struct sadb_msghdr *mhp; { - struct sadb_msg *msg0; struct sadb_address *src0, *dst0; struct secasindex saidx; struct secashead *newsah; struct secasvar *newsav; u_int8_t proto; u_int32_t spi; + u_int8_t mode; + u_int32_t reqid; + int error; + + lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_OWNED); /* sanity check */ - if (mhp == NULL || mhp[0] == NULL) + if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) panic("key_getspi: NULL pointer is passed.\n"); - msg0 = (struct sadb_msg *)mhp[0]; - - if (mhp[SADB_EXT_ADDRESS_SRC] == NULL - || mhp[SADB_EXT_ADDRESS_DST] == NULL) { -#if IPSEC_DEBUG - printf("key_getspi: invalid message is passed.\n"); -#endif - msg0->sadb_msg_errno = EINVAL; - return NULL; + if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || + mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { + ipseclog((LOG_DEBUG, "key_getspi: invalid message is passed.\n")); + return key_senderror(so, m, EINVAL); + } + if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || + mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { + ipseclog((LOG_DEBUG, "key_getspi: invalid message is passed.\n")); + return key_senderror(so, m, EINVAL); + } + if (mhp->ext[SADB_X_EXT_SA2] != NULL) { + mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; + reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; + } else { + mode = IPSEC_MODE_ANY; + reqid = 0; } - src0 = (struct sadb_address *)(mhp[SADB_EXT_ADDRESS_SRC]); - dst0 = (struct sadb_address *)(mhp[SADB_EXT_ADDRESS_DST]); + src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); + dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); /* map satype to proto */ - if ((proto = key_satype2proto(msg0->sadb_msg_satype)) == 0) { -#if IPSEC_DEBUG - printf("key_getspi: invalid satype is passed.\n"); -#endif - msg0->sadb_msg_errno = EINVAL; - return NULL; + if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { + ipseclog((LOG_DEBUG, "key_getspi: invalid satype is passed.\n")); + return key_senderror(so, m, EINVAL); + } + + /* make sure if port number is zero. */ + switch (((struct sockaddr *)(src0 + 1))->sa_family) { + case AF_INET: + if (((struct sockaddr *)(src0 + 1))->sa_len != + sizeof(struct sockaddr_in)) + return key_senderror(so, m, EINVAL); + ((struct sockaddr_in *)(src0 + 1))->sin_port = 0; + break; + case AF_INET6: + if (((struct sockaddr *)(src0 + 1))->sa_len != + sizeof(struct sockaddr_in6)) + return key_senderror(so, m, EINVAL); + ((struct sockaddr_in6 *)(src0 + 1))->sin6_port = 0; + break; + default: + ; /*???*/ + } + switch (((struct sockaddr *)(dst0 + 1))->sa_family) { + case AF_INET: + if (((struct sockaddr *)(dst0 + 1))->sa_len != + sizeof(struct sockaddr_in)) + return key_senderror(so, m, EINVAL); + ((struct sockaddr_in *)(dst0 + 1))->sin_port = 0; + break; + case AF_INET6: + if (((struct sockaddr *)(dst0 + 1))->sa_len != + sizeof(struct sockaddr_in6)) + return key_senderror(so, m, EINVAL); + ((struct sockaddr_in6 *)(dst0 + 1))->sin6_port = 0; + break; + default: + ; /*???*/ } - KEY_SETSECASIDX(proto, msg0, src0+1, dst0+1, &saidx); + /* XXX boundary check against sa_len */ + KEY_SETSECASIDX(proto, mode, reqid, src0 + 1, dst0 + 1, &saidx); /* SPI allocation */ - spi = key_do_getnewspi((struct sadb_spirange *)mhp[SADB_EXT_SPIRANGE], + spi = key_do_getnewspi((struct sadb_spirange *)mhp->ext[SADB_EXT_SPIRANGE], &saidx); - if (spi == 0) { - msg0->sadb_msg_errno = EEXIST; - return NULL; - } + if (spi == 0) + return key_senderror(so, m, EINVAL); /* get a SA index */ if ((newsah = key_getsah(&saidx)) == NULL) { - /* create a new SA index */ if ((newsah = key_newsah(&saidx)) == NULL) { -#if IPSEC_DEBUG - printf("key_getspi: No more memory.\n"); -#endif - msg0->sadb_msg_errno = ENOBUFS; - return NULL; + ipseclog((LOG_DEBUG, "key_getspi: No more memory.\n")); + return key_senderror(so, m, ENOBUFS); } } /* get a new SA */ - if ((newsav = key_newsav(mhp, newsah)) == NULL) { - msg0->sadb_msg_errno = ENOBUFS; + /* XXX rewrite */ + newsav = key_newsav(m, mhp, newsah, &error); + if (newsav == NULL) { /* XXX don't free new SA index allocated in above. */ - return NULL; + return key_senderror(so, m, error); } /* set spi */ - newsav->spi = htonl(spi); + key_setspi(newsav, htonl(spi)); #ifndef IPSEC_NONBLOCK_ACQUIRE /* delete the entry in acqtree */ - if (msg0->sadb_msg_seq != 0) { + if (mhp->msg->sadb_msg_seq != 0) { struct secacq *acq; - if ((acq = key_getacqbyseq(msg0->sadb_msg_seq)) != NULL) { - /* reset counter in order to deletion by timehander. */ - acq->tick = key_blockacq_lifetime; + if ((acq = key_getacqbyseq(mhp->msg->sadb_msg_seq)) != NULL) { + /* reset counter in order to deletion by timehandler. */ + struct timeval tv; + microtime(&tv); + acq->created = tv.tv_sec; acq->count = 0; } } #endif { + struct mbuf *n, *nn; + struct sadb_sa *m_sa; struct sadb_msg *newmsg; - u_int len; - caddr_t p; + int off, len; /* create new sadb_msg to reply. */ - len = sizeof(struct sadb_msg) - + sizeof(struct sadb_sa) - + PFKEY_EXTLEN(mhp[SADB_EXT_ADDRESS_SRC]) - + PFKEY_EXTLEN(mhp[SADB_EXT_ADDRESS_DST]); - - KMALLOC(newmsg, struct sadb_msg *, len); - if (newmsg == NULL) { -#if IPSEC_DEBUG - printf("key_getspi: No more memory.\n"); -#endif - msg0->sadb_msg_errno = ENOBUFS; - return NULL; + len = PFKEY_ALIGN8(sizeof(struct sadb_msg)) + + PFKEY_ALIGN8(sizeof(struct sadb_sa)); + if (len > MCLBYTES) + return key_senderror(so, m, ENOBUFS); + + MGETHDR(n, M_DONTWAIT, MT_DATA); + if (len > MHLEN) { + MCLGET(n, M_DONTWAIT); + if ((n->m_flags & M_EXT) == 0) { + m_freem(n); + n = NULL; + } } - bzero((caddr_t)newmsg, len); + if (!n) + return key_senderror(so, m, ENOBUFS); - bcopy((caddr_t)mhp[0], (caddr_t)newmsg, sizeof(*msg0)); - newmsg->sadb_msg_seq = newsav->seq; - newmsg->sadb_msg_errno = 0; - newmsg->sadb_msg_len = PFKEY_UNIT64(len); - p = (caddr_t)newmsg + sizeof(*msg0); + n->m_len = len; + n->m_next = NULL; + off = 0; - { - struct sadb_sa *m_sa; - m_sa = (struct sadb_sa *)p; + m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, caddr_t) + off); + off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); + + m_sa = (struct sadb_sa *)(mtod(n, caddr_t) + off); m_sa->sadb_sa_len = PFKEY_UNIT64(sizeof(struct sadb_sa)); m_sa->sadb_sa_exttype = SADB_EXT_SA; m_sa->sadb_sa_spi = htonl(spi); - p += sizeof(struct sadb_sa); - } + off += PFKEY_ALIGN8(sizeof(struct sadb_sa)); + +#if DIAGNOSTIC + if (off != len) + panic("length inconsistency in key_getspi"); +#endif + { + int mbufItems[] = {SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST}; + n->m_next = key_gather_mbuf(m, mhp, 0, sizeof(mbufItems)/sizeof(int), mbufItems); + if (!n->m_next) { + m_freem(n); + return key_senderror(so, m, ENOBUFS); + } + } + + if (n->m_len < sizeof(struct sadb_msg)) { + n = m_pullup(n, sizeof(struct sadb_msg)); + if (n == NULL) + return key_sendup_mbuf(so, m, KEY_SENDUP_ONE); + } - p = key_setsadbext(p, mhp[SADB_EXT_ADDRESS_SRC]); - p = key_setsadbext(p, mhp[SADB_EXT_ADDRESS_DST]); + n->m_pkthdr.len = 0; + for (nn = n; nn; nn = nn->m_next) + n->m_pkthdr.len += nn->m_len; - return newmsg; + newmsg = mtod(n, struct sadb_msg *); + newmsg->sadb_msg_seq = newsav->seq; + newmsg->sadb_msg_errno = 0; + newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); + + m_freem(m); + return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); } } @@ -4290,6 +4943,8 @@ key_do_getnewspi(spirange, saidx) u_int32_t min, max; int count = key_spi_trycnt; + lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_OWNED); + /* set spi range to allocate */ if (spirange != NULL) { min = spirange->sadb_spirange_min; @@ -4312,9 +4967,7 @@ key_do_getnewspi(spirange, saidx) if (min == max) { if (key_checkspidup(saidx, min) != NULL) { -#if IPSEC_DEBUG - printf("key_do_getnewspi: SPI %u exists already.\n", min); -#endif + ipseclog((LOG_DEBUG, "key_do_getnewspi: SPI %u exists already.\n", min)); return 0; } @@ -4329,16 +4982,14 @@ key_do_getnewspi(spirange, saidx) /* when requesting to allocate spi ranged */ while (count--) { /* generate pseudo-random SPI value ranged. */ - newspi = min + (random() % ( max - min + 1 )); + newspi = min + (key_random() % (max - min + 1)); if (key_checkspidup(saidx, newspi) == NULL) break; } if (count == 0 || newspi == 0) { -#if IPSEC_DEBUG - printf("key_do_getnewspi: to allocate spi is failed.\n"); -#endif + ipseclog((LOG_DEBUG, "key_do_getnewspi: to allocate spi is failed.\n")); return 0; } } @@ -4353,157 +5004,158 @@ key_do_getnewspi(spirange, saidx) /* * SADB_UPDATE processing * receive - * * from the ikmpd, and update a secasvar entry whose status is SADB_SASTATE_LARVAL. * and send - * * to the ikmpd. * - * IN: mhp: pointer to the pointer to each header. - * OUT: NULL if fail. - * other if success, return pointer to the message to send. + * m will always be freed. */ -static struct sadb_msg * -key_update(mhp) - caddr_t *mhp; +static int +key_update(so, m, mhp) + struct socket *so; + struct mbuf *m; + const struct sadb_msghdr *mhp; { - struct sadb_msg *msg0; struct sadb_sa *sa0; struct sadb_address *src0, *dst0; struct secasindex saidx; struct secashead *sah; struct secasvar *sav; u_int16_t proto; + u_int8_t mode; + u_int32_t reqid; + int error; + + lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_OWNED); /* sanity check */ - if (mhp == NULL || mhp[0] == NULL) + if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) panic("key_update: NULL pointer is passed.\n"); - msg0 = (struct sadb_msg *)mhp[0]; - /* map satype to proto */ - if ((proto = key_satype2proto(msg0->sadb_msg_satype)) == 0) { -#if IPSEC_DEBUG - printf("key_update: invalid satype is passed.\n"); -#endif - msg0->sadb_msg_errno = EINVAL; - return NULL; - } - - if (mhp[SADB_EXT_SA] == NULL - || mhp[SADB_EXT_ADDRESS_SRC] == NULL - || mhp[SADB_EXT_ADDRESS_DST] == NULL - || (msg0->sadb_msg_satype == SADB_SATYPE_ESP - && mhp[SADB_EXT_KEY_ENCRYPT] == NULL) - || (msg0->sadb_msg_satype == SADB_SATYPE_AH - && mhp[SADB_EXT_KEY_AUTH] == NULL) - || (mhp[SADB_EXT_LIFETIME_HARD] != NULL - && mhp[SADB_EXT_LIFETIME_SOFT] == NULL) - || (mhp[SADB_EXT_LIFETIME_HARD] == NULL - && mhp[SADB_EXT_LIFETIME_SOFT] != NULL)) { -#if IPSEC_DEBUG - printf("key_update: invalid message is passed.\n"); -#endif - msg0->sadb_msg_errno = EINVAL; - return NULL; + if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { + ipseclog((LOG_DEBUG, "key_update: invalid satype is passed.\n")); + return key_senderror(so, m, EINVAL); + } + + if (mhp->ext[SADB_EXT_SA] == NULL || + mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || + mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || + (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP && + mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) || + (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH && + mhp->ext[SADB_EXT_KEY_AUTH] == NULL) || + (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL && + mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) || + (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL && + mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) { + ipseclog((LOG_DEBUG, "key_update: invalid message is passed.\n")); + return key_senderror(so, m, EINVAL); + } + if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || + mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || + mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { + ipseclog((LOG_DEBUG, "key_update: invalid message is passed.\n")); + return key_senderror(so, m, EINVAL); + } + if (mhp->ext[SADB_X_EXT_SA2] != NULL) { + mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; + reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; + } else { + mode = IPSEC_MODE_ANY; + reqid = 0; } + /* XXX boundary checking for other extensions */ - sa0 = (struct sadb_sa *)mhp[SADB_EXT_SA]; - src0 = (struct sadb_address *)(mhp[SADB_EXT_ADDRESS_SRC]); - dst0 = (struct sadb_address *)(mhp[SADB_EXT_ADDRESS_DST]); + sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; + src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); + dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); - KEY_SETSECASIDX(proto, msg0, src0+1, dst0+1, &saidx); + /* XXX boundary check against sa_len */ + KEY_SETSECASIDX(proto, mode, reqid, src0 + 1, dst0 + 1, &saidx); /* get a SA header */ if ((sah = key_getsah(&saidx)) == NULL) { -#if IPSEC_DEBUG - printf("key_update: no SA index found.\n"); -#endif - msg0->sadb_msg_errno = ENOENT; - return NULL; + ipseclog((LOG_DEBUG, "key_update: no SA index found.\n")); + return key_senderror(so, m, ENOENT); } /* set spidx if there */ - if (key_setident(sah, mhp) < 0) - return NULL; + /* XXX rewrite */ + error = key_setident(sah, m, mhp); + if (error) + return key_senderror(so, m, error); /* find a SA with sequence number. */ #if IPSEC_DOSEQCHECK - if (msg0->sadb_msg_seq != 0 - && (sav = key_getsavbyseq(sah, msg0->sadb_msg_seq)) == NULL) { -#if IPSEC_DEBUG - printf("key_update: no larval SA with sequence %u exists.\n", - msg0->sadb_msg_seq); -#endif - msg0->sadb_msg_errno = ENOENT; - return NULL; + if (mhp->msg->sadb_msg_seq != 0 + && (sav = key_getsavbyseq(sah, mhp->msg->sadb_msg_seq)) == NULL) { + ipseclog((LOG_DEBUG, + "key_update: no larval SA with sequence %u exists.\n", + mhp->msg->sadb_msg_seq)); + return key_senderror(so, m, ENOENT); } #else if ((sav = key_getsavbyspi(sah, sa0->sadb_sa_spi)) == NULL) { -#if IPSEC_DEBUG - printf("key_update: no such a SA found (spi:%u)\n", - (u_int32_t)ntohl(sa0->sadb_sa_spi)); -#endif - msg0->sadb_msg_errno = EINVAL; - return NULL; + ipseclog((LOG_DEBUG, + "key_update: no such a SA found (spi:%u)\n", + (u_int32_t)ntohl(sa0->sadb_sa_spi))); + return key_senderror(so, m, EINVAL); } #endif /* validity check */ if (sav->sah->saidx.proto != proto) { -#if IPSEC_DEBUG - printf("key_update: protocol mismatched (DB=%u param=%u)\n", - sav->sah->saidx.proto, proto); -#endif - msg0->sadb_msg_errno = EINVAL; - return NULL; + ipseclog((LOG_DEBUG, + "key_update: protocol mismatched (DB=%u param=%u)\n", + sav->sah->saidx.proto, proto)); + return key_senderror(so, m, EINVAL); } #if IPSEC_DOSEQCHECK if (sav->spi != sa0->sadb_sa_spi) { -#if IPSEC_DEBUG - printf("key_update: SPI mismatched (DB:%u param:%u)\n", - (u_int32_t)ntohl(sav->spi), - (u_int32_t)ntohl(sa0->sadb_sa_spi)); -#endif - msg0->sadb_msg_errno = EINVAL; - return NULL; + ipseclog((LOG_DEBUG, + "key_update: SPI mismatched (DB:%u param:%u)\n", + (u_int32_t)ntohl(sav->spi), + (u_int32_t)ntohl(sa0->sadb_sa_spi))); + return key_senderror(so, m, EINVAL); } #endif - if (sav->pid != msg0->sadb_msg_pid) { -#if IPSEC_DEBUG - printf("key_update: pid mismatched (DB:%u param:%u)\n", - sav->pid, msg0->sadb_msg_pid); -#endif - msg0->sadb_msg_errno = EINVAL; - return NULL; + if (sav->pid != mhp->msg->sadb_msg_pid) { + ipseclog((LOG_DEBUG, + "key_update: pid mismatched (DB:%u param:%u)\n", + sav->pid, mhp->msg->sadb_msg_pid)); + return key_senderror(so, m, EINVAL); } /* copy sav values */ - if (key_setsaval(sav, mhp)) { + error = key_setsaval(sav, m, mhp); + if (error) { key_freesav(sav); - return NULL; + return key_senderror(so, m, error); } /* check SA values to be mature. */ - if ((msg0->sadb_msg_errno = key_mature(sav)) != 0) { + if ((error = key_mature(sav)) != 0) { key_freesav(sav); - return NULL; + return key_senderror(so, m, error); } { - struct sadb_msg *newmsg; + struct mbuf *n; /* set msg buf from mhp */ - if ((newmsg = key_getmsgbuf_x1(mhp)) == NULL) { -#if IPSEC_DEBUG - printf("key_update: No more memory.\n"); -#endif - msg0->sadb_msg_errno = ENOBUFS; - return NULL; + n = key_getmsgbuf_x1(m, mhp); + if (n == NULL) { + ipseclog((LOG_DEBUG, "key_update: No more memory.\n")); + return key_senderror(so, m, ENOBUFS); } - return newmsg; + + m_freem(m); + return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); } } @@ -4523,6 +5175,8 @@ key_getsavbyseq(sah, seq) struct secasvar *sav; u_int state; + lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_OWNED); + state = SADB_SASTATE_LARVAL; /* search SAD with sequence number ? */ @@ -4547,104 +5201,113 @@ key_getsavbyseq(sah, seq) /* * SADB_ADD processing * add a entry to SA database, when received - * * from the ikmpd, * and send - * * to the ikmpd. * * IGNORE identity and sensitivity messages. * - * IN: mhp: pointer to the pointer to each header. - * OUT: NULL if fail. - * other if success, return pointer to the message to send. + * m will always be freed. */ -static struct sadb_msg * -key_add(mhp) - caddr_t *mhp; +static int +key_add(so, m, mhp) + struct socket *so; + struct mbuf *m; + const struct sadb_msghdr *mhp; { - struct sadb_msg *msg0; struct sadb_sa *sa0; struct sadb_address *src0, *dst0; struct secasindex saidx; struct secashead *newsah; struct secasvar *newsav; u_int16_t proto; + u_int8_t mode; + u_int32_t reqid; + int error; + + lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_OWNED); /* sanity check */ - if (mhp == NULL || mhp[0] == NULL) + if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) panic("key_add: NULL pointer is passed.\n"); - msg0 = (struct sadb_msg *)mhp[0]; - /* map satype to proto */ - if ((proto = key_satype2proto(msg0->sadb_msg_satype)) == 0) { -#if IPSEC_DEBUG - printf("key_add: invalid satype is passed.\n"); -#endif - msg0->sadb_msg_errno = EINVAL; - return NULL; - } - - if (mhp[SADB_EXT_SA] == NULL - || mhp[SADB_EXT_ADDRESS_SRC] == NULL - || mhp[SADB_EXT_ADDRESS_DST] == NULL - || (msg0->sadb_msg_satype == SADB_SATYPE_ESP - && mhp[SADB_EXT_KEY_ENCRYPT] == NULL) - || (msg0->sadb_msg_satype == SADB_SATYPE_AH - && mhp[SADB_EXT_KEY_AUTH] == NULL) - || (mhp[SADB_EXT_LIFETIME_HARD] != NULL - && mhp[SADB_EXT_LIFETIME_SOFT] == NULL) - || (mhp[SADB_EXT_LIFETIME_HARD] == NULL - && mhp[SADB_EXT_LIFETIME_SOFT] != NULL)) { -#if IPSEC_DEBUG - printf("key_add: invalid message is passed.\n"); -#endif - msg0->sadb_msg_errno = EINVAL; - return NULL; + if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { + ipseclog((LOG_DEBUG, "key_add: invalid satype is passed.\n")); + return key_senderror(so, m, EINVAL); + } + + if (mhp->ext[SADB_EXT_SA] == NULL || + mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || + mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || + (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP && + mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) || + (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH && + mhp->ext[SADB_EXT_KEY_AUTH] == NULL) || + (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL && + mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) || + (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL && + mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) { + ipseclog((LOG_DEBUG, "key_add: invalid message is passed.\n")); + return key_senderror(so, m, EINVAL); + } + if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || + mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || + mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { + /* XXX need more */ + ipseclog((LOG_DEBUG, "key_add: invalid message is passed.\n")); + return key_senderror(so, m, EINVAL); + } + if (mhp->ext[SADB_X_EXT_SA2] != NULL) { + mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; + reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; + } else { + mode = IPSEC_MODE_ANY; + reqid = 0; } - sa0 = (struct sadb_sa *)mhp[SADB_EXT_SA]; - src0 = (struct sadb_address *)(mhp[SADB_EXT_ADDRESS_SRC]); - dst0 = (struct sadb_address *)(mhp[SADB_EXT_ADDRESS_DST]); + sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; + src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; + dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; - KEY_SETSECASIDX(proto, msg0, src0+1, dst0+1, &saidx); + /* XXX boundary check against sa_len */ + KEY_SETSECASIDX(proto, mode, reqid, src0 + 1, dst0 + 1, &saidx); /* get a SA header */ if ((newsah = key_getsah(&saidx)) == NULL) { - /* create a new SA header */ if ((newsah = key_newsah(&saidx)) == NULL) { -#if IPSEC_DEBUG - printf("key_add: No more memory.\n"); -#endif - msg0->sadb_msg_errno = ENOBUFS; - return NULL; + ipseclog((LOG_DEBUG, "key_add: No more memory.\n")); + return key_senderror(so, m, ENOBUFS); } } /* set spidx if there */ - if (key_setident(newsah, mhp) < 0) - return NULL; + /* XXX rewrite */ + error = key_setident(newsah, m, mhp); + if (error) { + return key_senderror(so, m, error); + } /* create new SA entry. */ /* We can create new SA only if SPI is differenct. */ if (key_getsavbyspi(newsah, sa0->sadb_sa_spi)) { -#if IPSEC_DEBUG - printf("key_add: SA already exists.\n"); -#endif - msg0->sadb_msg_errno = EEXIST; - return NULL; + ipseclog((LOG_DEBUG, "key_add: SA already exists.\n")); + return key_senderror(so, m, EEXIST); + } + newsav = key_newsav(m, mhp, newsah, &error); + if (newsav == NULL) { + return key_senderror(so, m, error); } - if ((newsav = key_newsav(mhp, newsah)) == NULL) - return NULL; /* check SA values to be mature. */ - if ((msg0->sadb_msg_errno = key_mature(newsav)) != NULL) { + if ((error = key_mature(newsav)) != 0) { key_freesav(newsav); - return NULL; + return key_senderror(so, m, error); } /* @@ -4653,100 +5316,62 @@ key_add(mhp) */ { - struct sadb_msg *newmsg; + struct mbuf *n; /* set msg buf from mhp */ - if ((newmsg = key_getmsgbuf_x1(mhp)) == NULL) { -#if IPSEC_DEBUG - printf("key_add: No more memory.\n"); -#endif - msg0->sadb_msg_errno = ENOBUFS; - return NULL; + n = key_getmsgbuf_x1(m, mhp); + if (n == NULL) { + ipseclog((LOG_DEBUG, "key_update: No more memory.\n")); + return key_senderror(so, m, ENOBUFS); } - return newmsg; + m_freem(m); + return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); } } +/* m is retained */ static int -key_setident(sah, mhp) +key_setident(sah, m, mhp) struct secashead *sah; - caddr_t *mhp; + struct mbuf *m; + const struct sadb_msghdr *mhp; { - struct sadb_msg *msg0; - struct sadb_ident *idsrc, *iddst; + const struct sadb_ident *idsrc, *iddst; int idsrclen, iddstlen; + lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_OWNED); + /* sanity check */ - if (sah == NULL || mhp == NULL || mhp[0] == NULL) + if (sah == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) panic("key_setident: NULL pointer is passed.\n"); - msg0 = (struct sadb_msg *)mhp[0]; - /* don't make buffer if not there */ - if (mhp[SADB_EXT_IDENTITY_SRC] == NULL - && mhp[SADB_EXT_IDENTITY_DST] == NULL) { + if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL && + mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) { sah->idents = NULL; sah->identd = NULL; return 0; } - if (mhp[SADB_EXT_IDENTITY_SRC] == NULL - || mhp[SADB_EXT_IDENTITY_DST] == NULL) { -#if IPSEC_DEBUG - printf("key_setident: invalid identity.\n"); -#endif - msg0->sadb_msg_errno = EINVAL; - return -1; + if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL || + mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) { + ipseclog((LOG_DEBUG, "key_setident: invalid identity.\n")); + return EINVAL; } - idsrc = (struct sadb_ident *)mhp[SADB_EXT_IDENTITY_SRC]; - iddst = (struct sadb_ident *)mhp[SADB_EXT_IDENTITY_DST]; - idsrclen = PFKEY_UNUNIT64(idsrc->sadb_ident_len); - iddstlen = PFKEY_UNUNIT64(idsrc->sadb_ident_len); + idsrc = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_SRC]; + iddst = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_DST]; + idsrclen = mhp->extlen[SADB_EXT_IDENTITY_SRC]; + iddstlen = mhp->extlen[SADB_EXT_IDENTITY_DST]; /* validity check */ if (idsrc->sadb_ident_type != iddst->sadb_ident_type) { -#if IPSEC_DEBUG - printf("key_setident: ident type mismatch.\n"); -#endif - msg0->sadb_msg_errno = EINVAL; - return -1; + ipseclog((LOG_DEBUG, "key_setident: ident type mismatch.\n")); + return EINVAL; } switch (idsrc->sadb_ident_type) { - case SADB_X_IDENTTYPE_ADDR: - if (idsrclen != - sizeof(*idsrc) + ((struct sockaddr *)(idsrc + 1))->sa_len - || iddstlen != - sizeof(*iddst) + ((struct sockaddr *)(iddst + 1))->sa_len) { -#if IPSEC_DEBUG - printf("key_setident: invalid length is passed.\n"); -#endif - msg0->sadb_msg_errno = EINVAL; - return -1; - } - if (((struct sockaddr *)(idsrc + 1))->sa_len > - sizeof(struct sockaddr_storage) - || ((struct sockaddr *)(iddst + 1))->sa_len > - sizeof(struct sockaddr_storage)) { -#if IPSEC_DEBUG - printf("key_setident: invalid sa_len is passed.\n"); -#endif - msg0->sadb_msg_errno = EINVAL; - return -1; - } -#define __IDENTXID(a) ((union sadb_x_ident_id *)&(a)->sadb_ident_id) - if (__IDENTXID(idsrc)->sadb_x_ident_id_addr.ul_proto - != __IDENTXID(iddst)->sadb_x_ident_id_addr.ul_proto) { -#if IPSEC_DEBUG - printf("key_setident: ul_proto mismatch.\n"); -#endif - msg0->sadb_msg_errno = EINVAL; - return -1; - } -#undef __IDENTXID(a) - break; case SADB_IDENTTYPE_PREFIX: case SADB_IDENTTYPE_FQDN: case SADB_IDENTTYPE_USERFQDN: @@ -4760,20 +5385,15 @@ key_setident(sah, mhp) /* make structure */ KMALLOC(sah->idents, struct sadb_ident *, idsrclen); if (sah->idents == NULL) { -#if IPSEC_DEBUG - printf("key_setident: No more memory.\n"); -#endif - msg0->sadb_msg_errno = ENOBUFS; - return -1; + ipseclog((LOG_DEBUG, "key_setident: No more memory.\n")); + return ENOBUFS; } KMALLOC(sah->identd, struct sadb_ident *, iddstlen); if (sah->identd == NULL) { KFREE(sah->idents); -#if IPSEC_DEBUG - printf("key_setident: No more memory.\n"); -#endif - msg0->sadb_msg_errno = ENOBUFS; - return -1; + sah->idents = NULL; + ipseclog((LOG_DEBUG, "key_setident: No more memory.\n")); + return ENOBUFS; } bcopy(idsrc, sah->idents, idsrclen); bcopy(iddst, sah->identd, iddstlen); @@ -4781,63 +5401,46 @@ key_setident(sah, mhp) return 0; } -static struct sadb_msg * -key_getmsgbuf_x1(mhp) - caddr_t *mhp; +/* + * m will not be freed on return. + * it is caller's responsibility to free the result. + */ +static struct mbuf * +key_getmsgbuf_x1(m, mhp) + struct mbuf *m; + const struct sadb_msghdr *mhp; { - struct sadb_msg *msg0; - struct sadb_msg *newmsg; - u_int len; - caddr_t p; + struct mbuf *n; + int mbufItems[] = {SADB_EXT_RESERVED, SADB_EXT_SA, + SADB_X_EXT_SA2, SADB_EXT_ADDRESS_SRC, + SADB_EXT_ADDRESS_DST, SADB_EXT_LIFETIME_HARD, + SADB_EXT_LIFETIME_SOFT, SADB_EXT_IDENTITY_SRC, + SADB_EXT_IDENTITY_DST}; /* sanity check */ - if (mhp == NULL || mhp[0] == NULL) + if (m == NULL || mhp == NULL || mhp->msg == NULL) panic("key_getmsgbuf_x1: NULL pointer is passed.\n"); - msg0 = (struct sadb_msg *)mhp[0]; - /* create new sadb_msg to reply. */ - len = sizeof(struct sadb_msg) - + sizeof(struct sadb_sa) - + PFKEY_EXTLEN(mhp[SADB_EXT_ADDRESS_SRC]) - + PFKEY_EXTLEN(mhp[SADB_EXT_ADDRESS_DST]) - + (mhp[SADB_EXT_LIFETIME_HARD] == NULL - ? 0 : sizeof(struct sadb_lifetime)) - + (mhp[SADB_EXT_LIFETIME_SOFT] == NULL - ? 0 : sizeof(struct sadb_lifetime)) - + (mhp[SADB_EXT_IDENTITY_SRC] == NULL - ? 0 : PFKEY_EXTLEN(mhp[SADB_EXT_IDENTITY_SRC])) - + (mhp[SADB_EXT_IDENTITY_DST] == NULL - ? 0 : PFKEY_EXTLEN(mhp[SADB_EXT_IDENTITY_DST])); - - KMALLOC(newmsg, struct sadb_msg *, len); - if (newmsg == NULL) + n = key_gather_mbuf(m, mhp, 1, sizeof(mbufItems)/sizeof(int), mbufItems); + if (!n) return NULL; - bzero((caddr_t)newmsg, len); - bcopy((caddr_t)mhp[0], (caddr_t)newmsg, sizeof(*msg0)); - newmsg->sadb_msg_errno = 0; - newmsg->sadb_msg_len = PFKEY_UNIT64(len); - p = (caddr_t)newmsg + sizeof(*msg0); - - p = key_setsadbext(p, mhp[SADB_EXT_SA]); - p = key_setsadbext(p, mhp[SADB_EXT_ADDRESS_SRC]); - p = key_setsadbext(p, mhp[SADB_EXT_ADDRESS_DST]); - - if (mhp[SADB_EXT_LIFETIME_HARD] != NULL) - p = key_setsadbext(p, mhp[SADB_EXT_LIFETIME_HARD]); - - if (mhp[SADB_EXT_LIFETIME_SOFT] != NULL) - p = key_setsadbext(p, mhp[SADB_EXT_LIFETIME_SOFT]); - - if (mhp[SADB_EXT_IDENTITY_SRC] != NULL) - p = key_setsadbext(p, mhp[SADB_EXT_IDENTITY_SRC]); - if (mhp[SADB_EXT_IDENTITY_DST] != NULL) - p = key_setsadbext(p, mhp[SADB_EXT_IDENTITY_DST]); + if (n->m_len < sizeof(struct sadb_msg)) { + n = m_pullup(n, sizeof(struct sadb_msg)); + if (n == NULL) + return NULL; + } + mtod(n, struct sadb_msg *)->sadb_msg_errno = 0; + mtod(n, struct sadb_msg *)->sadb_msg_len = + PFKEY_UNIT64(n->m_pkthdr.len); - return newmsg; + return n; } +static int key_delete_all(struct socket *, struct mbuf *, + const struct sadb_msghdr *, u_int16_t); + /* * SADB_DELETE processing * receive @@ -4847,69 +5450,80 @@ key_getmsgbuf_x1(mhp) * * to the ikmpd. * - * IN: mhp: pointer to the pointer to each header. - * OUT: NULL if fail. - * other if success, return pointer to the message to send. + * m will always be freed. */ -static struct sadb_msg * -key_delete(mhp) - caddr_t *mhp; +static int +key_delete(so, m, mhp) + struct socket *so; + struct mbuf *m; + const struct sadb_msghdr *mhp; { - struct sadb_msg *msg0; struct sadb_sa *sa0; struct sadb_address *src0, *dst0; struct secasindex saidx; struct secashead *sah; - struct secasvar *sav; + struct secasvar *sav = NULL; u_int16_t proto; + lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_OWNED); + /* sanity check */ - if (mhp == NULL || mhp[0] == NULL) + if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) panic("key_delete: NULL pointer is passed.\n"); - msg0 = (struct sadb_msg *)mhp[0]; - /* map satype to proto */ - if ((proto = key_satype2proto(msg0->sadb_msg_satype)) == 0) { -#if IPSEC_DEBUG - printf("key_delete: invalid satype is passed.\n"); -#endif - msg0->sadb_msg_errno = EINVAL; - return NULL; + if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { + ipseclog((LOG_DEBUG, "key_delete: invalid satype is passed.\n")); + return key_senderror(so, m, EINVAL); } - if (mhp[SADB_EXT_SA] == NULL - || mhp[SADB_EXT_ADDRESS_SRC] == NULL - || mhp[SADB_EXT_ADDRESS_DST] == NULL) { -#if IPSEC_DEBUG - printf("key_delete: invalid message is passed.\n"); -#endif - msg0->sadb_msg_errno = EINVAL; - return NULL; + if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || + mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { + ipseclog((LOG_DEBUG, "key_delete: invalid message is passed.\n")); + return key_senderror(so, m, EINVAL); } - sa0 = (struct sadb_sa *)mhp[SADB_EXT_SA]; - src0 = (struct sadb_address *)(mhp[SADB_EXT_ADDRESS_SRC]); - dst0 = (struct sadb_address *)(mhp[SADB_EXT_ADDRESS_DST]); - KEY_SETSECASIDX(proto, msg0, src0+1, dst0+1, &saidx); + if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || + mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { + ipseclog((LOG_DEBUG, "key_delete: invalid message is passed.\n")); + return key_senderror(so, m, EINVAL); + } - /* get a SA header */ - if ((sah = key_getsah(&saidx)) == NULL) { -#if IPSEC_DEBUG - printf("key_delete: no SA found.\n"); -#endif - msg0->sadb_msg_errno = ENOENT; - return NULL; + if (mhp->ext[SADB_EXT_SA] == NULL) { + /* + * Caller wants us to delete all non-LARVAL SAs + * that match the src/dst. This is used during + * IKE INITIAL-CONTACT. + */ + ipseclog((LOG_DEBUG, "key_delete: doing delete all.\n")); + return key_delete_all(so, m, mhp, proto); + } else if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa)) { + ipseclog((LOG_DEBUG, "key_delete: invalid message is passed.\n")); + return key_senderror(so, m, EINVAL); } - /* get a SA with SPI. */ - sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); - if (sav == NULL) { -#if IPSEC_DEBUG - printf("key_delete: no alive SA found.\n"); -#endif - msg0->sadb_msg_errno = ENOENT; - return NULL; + sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; + src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); + dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); + + /* XXX boundary check against sa_len */ + KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx); + + /* get a SA header */ + LIST_FOREACH(sah, &sahtree, chain) { + if (sah->state == SADB_SASTATE_DEAD) + continue; + if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0) + continue; + + /* get a SA with SPI. */ + sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); + if (sav) + break; + } + if (sah == NULL) { + ipseclog((LOG_DEBUG, "key_delete: no SA found.\n")); + return key_senderror(so, m, ENOENT); } key_sa_chgstate(sav, SADB_SASTATE_DEAD); @@ -4917,36 +5531,106 @@ key_delete(mhp) sav = NULL; { + struct mbuf *n; struct sadb_msg *newmsg; - u_int len; - caddr_t p; + int mbufItems[] = {SADB_EXT_RESERVED, SADB_EXT_SA, + SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST}; /* create new sadb_msg to reply. */ - len = sizeof(struct sadb_msg) - + sizeof(struct sadb_sa) - + PFKEY_EXTLEN(mhp[SADB_EXT_ADDRESS_SRC]) - + PFKEY_EXTLEN(mhp[SADB_EXT_ADDRESS_DST]); - - KMALLOC(newmsg, struct sadb_msg *, len); - if (newmsg == NULL) { -#if IPSEC_DEBUG - printf("key_delete: No more memory.\n"); -#endif - msg0->sadb_msg_errno = ENOBUFS; - return NULL; - } - bzero((caddr_t)newmsg, len); + n = key_gather_mbuf(m, mhp, 1, sizeof(mbufItems)/sizeof(int), mbufItems); + if (!n) + return key_senderror(so, m, ENOBUFS); - bcopy((caddr_t)mhp[0], (caddr_t)newmsg, sizeof(*msg0)); + if (n->m_len < sizeof(struct sadb_msg)) { + n = m_pullup(n, sizeof(struct sadb_msg)); + if (n == NULL) + return key_senderror(so, m, ENOBUFS); + } + newmsg = mtod(n, struct sadb_msg *); newmsg->sadb_msg_errno = 0; - newmsg->sadb_msg_len = PFKEY_UNIT64(len); - p = (caddr_t)newmsg + sizeof(*msg0); + newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); - p = key_setsadbext(p, mhp[SADB_EXT_SA]); - p = key_setsadbext(p, mhp[SADB_EXT_ADDRESS_SRC]); - p = key_setsadbext(p, mhp[SADB_EXT_ADDRESS_DST]); + m_freem(m); + return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); + } +} + +/* + * delete all SAs for src/dst. Called from key_delete(). + */ +static int +key_delete_all(so, m, mhp, proto) + struct socket *so; + struct mbuf *m; + const struct sadb_msghdr *mhp; + u_int16_t proto; +{ + struct sadb_address *src0, *dst0; + struct secasindex saidx; + struct secashead *sah; + struct secasvar *sav, *nextsav; + u_int stateidx, state; + + lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_OWNED); + + src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); + dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); + + /* XXX boundary check against sa_len */ + KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx); - return newmsg; + LIST_FOREACH(sah, &sahtree, chain) { + if (sah->state == SADB_SASTATE_DEAD) + continue; + if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0) + continue; + + /* Delete all non-LARVAL SAs. */ + for (stateidx = 0; + stateidx < _ARRAYLEN(saorder_state_alive); + stateidx++) { + state = saorder_state_alive[stateidx]; + if (state == SADB_SASTATE_LARVAL) + continue; + for (sav = LIST_FIRST(&sah->savtree[state]); + sav != NULL; sav = nextsav) { + nextsav = LIST_NEXT(sav, chain); + /* sanity check */ + if (sav->state != state) { + ipseclog((LOG_DEBUG, "key_delete_all: " + "invalid sav->state " + "(queue: %d SA: %d)\n", + state, sav->state)); + continue; + } + + key_sa_chgstate(sav, SADB_SASTATE_DEAD); + key_freesav(sav); + } + } + } + { + struct mbuf *n; + struct sadb_msg *newmsg; + int mbufItems[] = {SADB_EXT_RESERVED, SADB_EXT_ADDRESS_SRC, + SADB_EXT_ADDRESS_DST}; + + /* create new sadb_msg to reply. */ + n = key_gather_mbuf(m, mhp, 1, sizeof(mbufItems)/sizeof(int), mbufItems); + if (!n) + return key_senderror(so, m, ENOBUFS); + + if (n->m_len < sizeof(struct sadb_msg)) { + n = m_pullup(n, sizeof(struct sadb_msg)); + if (n == NULL) + return key_senderror(so, m, ENOBUFS); + } + newmsg = mtod(n, struct sadb_msg *); + newmsg->sadb_msg_errno = 0; + newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); + + m_freem(m); + return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); } } @@ -4960,117 +5644,358 @@ key_delete(mhp) * (identity(SD),) (sensitivity)> * to the ikmpd. * - * IN: mhp: pointer to the pointer to each header. - * OUT: NULL if fail. - * other if success, return pointer to the message to send. + * m will always be freed. */ -static struct sadb_msg * -key_get(mhp) - caddr_t *mhp; +static int +key_get(so, m, mhp) + struct socket *so; + struct mbuf *m; + const struct sadb_msghdr *mhp; { - struct sadb_msg *msg0; struct sadb_sa *sa0; struct sadb_address *src0, *dst0; struct secasindex saidx; struct secashead *sah; - struct secasvar *sav; + struct secasvar *sav = NULL; u_int16_t proto; + lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_OWNED); + /* sanity check */ - if (mhp == NULL || mhp[0] == NULL) + if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) panic("key_get: NULL pointer is passed.\n"); - msg0 = (struct sadb_msg *)mhp[0]; - /* map satype to proto */ - if ((proto = key_satype2proto(msg0->sadb_msg_satype)) == 0) { -#if IPSEC_DEBUG - printf("key_get: invalid satype is passed.\n"); -#endif - msg0->sadb_msg_errno = EINVAL; - return NULL; + if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { + ipseclog((LOG_DEBUG, "key_get: invalid satype is passed.\n")); + return key_senderror(so, m, EINVAL); } - if (mhp[SADB_EXT_SA] == NULL - || mhp[SADB_EXT_ADDRESS_SRC] == NULL - || mhp[SADB_EXT_ADDRESS_DST] == NULL) { -#if IPSEC_DEBUG - printf("key_get: invalid message is passed.\n"); -#endif - msg0->sadb_msg_errno = EINVAL; - return NULL; + if (mhp->ext[SADB_EXT_SA] == NULL || + mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || + mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { + ipseclog((LOG_DEBUG, "key_get: invalid message is passed.\n")); + return key_senderror(so, m, EINVAL); + } + if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || + mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || + mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { + ipseclog((LOG_DEBUG, "key_get: invalid message is passed.\n")); + return key_senderror(so, m, EINVAL); } - sa0 = (struct sadb_sa *)mhp[SADB_EXT_SA]; - src0 = (struct sadb_address *)(mhp[SADB_EXT_ADDRESS_SRC]); - dst0 = (struct sadb_address *)(mhp[SADB_EXT_ADDRESS_DST]); - KEY_SETSECASIDX(proto, msg0, src0+1, dst0+1, &saidx); + sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; + src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; + dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; + + /* XXX boundary check against sa_len */ + KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx); /* get a SA header */ - if ((sah = key_getsah(&saidx)) == NULL) { -#if IPSEC_DEBUG - printf("key_get: no SA found.\n"); -#endif - msg0->sadb_msg_errno = ENOENT; - return NULL; - } + LIST_FOREACH(sah, &sahtree, chain) { + if (sah->state == SADB_SASTATE_DEAD) + continue; + if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0) + continue; - /* get a SA with SPI. */ - sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); - if (sav == NULL) { -#if IPSEC_DEBUG - printf("key_get: no SA with state of mature found.\n"); -#endif - msg0->sadb_msg_errno = ENOENT; - return NULL; + /* get a SA with SPI. */ + sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); + if (sav) + break; + } + if (sah == NULL) { + ipseclog((LOG_DEBUG, "key_get: no SA found.\n")); + return key_senderror(so, m, ENOENT); } { - struct sadb_msg *newmsg; - u_int len; + struct mbuf *n; u_int8_t satype; /* map proto to satype */ if ((satype = key_proto2satype(sah->saidx.proto)) == 0) { -#if IPSEC_DEBUG - printf("key_get: there was invalid proto in SAD.\n"); + ipseclog((LOG_DEBUG, "key_get: there was invalid proto in SAD.\n")); + return key_senderror(so, m, EINVAL); + } + + /* create new sadb_msg to reply. */ + n = key_setdumpsa(sav, SADB_GET, satype, mhp->msg->sadb_msg_seq, + mhp->msg->sadb_msg_pid); + if (!n) + return key_senderror(so, m, ENOBUFS); + + m_freem(m); + return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); + } +} + +/* XXX make it sysctl-configurable? */ +static void +key_getcomb_setlifetime(comb) + struct sadb_comb *comb; +{ + + comb->sadb_comb_soft_allocations = 1; + comb->sadb_comb_hard_allocations = 1; + comb->sadb_comb_soft_bytes = 0; + comb->sadb_comb_hard_bytes = 0; + comb->sadb_comb_hard_addtime = 86400; /* 1 day */ + comb->sadb_comb_soft_addtime = comb->sadb_comb_soft_addtime * 80 / 100; + comb->sadb_comb_soft_usetime = 28800; /* 8 hours */ + comb->sadb_comb_hard_usetime = comb->sadb_comb_hard_usetime * 80 / 100; +} + +#if IPSEC_ESP +/* + * XXX reorder combinations by preference + * XXX no idea if the user wants ESP authentication or not + */ +static struct mbuf * +key_getcomb_esp() +{ + struct sadb_comb *comb; + const struct esp_algorithm *algo; + struct mbuf *result = NULL, *m, *n; + int encmin; + int i, off, o; + int totlen; + const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); + + m = NULL; + for (i = 1; i <= SADB_EALG_MAX; i++) { + algo = esp_algorithm_lookup(i); + if (!algo) + continue; + + if (algo->keymax < ipsec_esp_keymin) + continue; + if (algo->keymin < ipsec_esp_keymin) + encmin = ipsec_esp_keymin; + else + encmin = algo->keymin; + + if (ipsec_esp_auth) + m = key_getcomb_ah(); + else { +#if DIAGNOSTIC + if (l > MLEN) + panic("assumption failed in key_getcomb_esp"); +#endif + MGET(m, M_DONTWAIT, MT_DATA); + if (m) { + M_ALIGN(m, l); + m->m_len = l; + m->m_next = NULL; + bzero(mtod(m, caddr_t), m->m_len); + } + } + if (!m) + goto fail; + + totlen = 0; + for (n = m; n; n = n->m_next) + totlen += n->m_len; +#if DIAGNOSTIC + if (totlen % l) + panic("assumption failed in key_getcomb_esp"); +#endif + + for (off = 0; off < totlen; off += l) { + n = m_pulldown(m, off, l, &o); + if (!n) { + /* m is already freed */ + goto fail; + } + comb = (struct sadb_comb *)(mtod(n, caddr_t) + o); + bzero(comb, sizeof(*comb)); + key_getcomb_setlifetime(comb); + comb->sadb_comb_encrypt = i; + comb->sadb_comb_encrypt_minbits = encmin; + comb->sadb_comb_encrypt_maxbits = algo->keymax; + } + + if (!result) + result = m; + else + m_cat(result, m); + } + + return result; + + fail: + if (result) + m_freem(result); + return NULL; +} #endif - msg0->sadb_msg_errno = EINVAL; - return NULL; + +/* + * XXX reorder combinations by preference + */ +static struct mbuf * +key_getcomb_ah() +{ + struct sadb_comb *comb; + const struct ah_algorithm *algo; + struct mbuf *m; + int min; + int i; + const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); + + m = NULL; + for (i = 1; i <= SADB_AALG_MAX; i++) { +#if 1 + /* we prefer HMAC algorithms, not old algorithms */ + if (i != SADB_AALG_SHA1HMAC && i != SADB_AALG_MD5HMAC) + continue; +#endif + algo = ah_algorithm_lookup(i); + if (!algo) + continue; + + if (algo->keymax < ipsec_ah_keymin) + continue; + if (algo->keymin < ipsec_ah_keymin) + min = ipsec_ah_keymin; + else + min = algo->keymin; + + if (!m) { +#if DIAGNOSTIC + if (l > MLEN) + panic("assumption failed in key_getcomb_ah"); +#endif + MGET(m, M_DONTWAIT, MT_DATA); + if (m) { + M_ALIGN(m, l); + m->m_len = l; + m->m_next = NULL; + } + } else + M_PREPEND(m, l, M_DONTWAIT); + if (!m) + return NULL; + + comb = mtod(m, struct sadb_comb *); + bzero(comb, sizeof(*comb)); + key_getcomb_setlifetime(comb); + comb->sadb_comb_auth = i; + comb->sadb_comb_auth_minbits = min; + comb->sadb_comb_auth_maxbits = algo->keymax; } - /* calculate a length of message buffer */ - len = key_getmsglen(sav); + return m; +} - KMALLOC(newmsg, struct sadb_msg *, len); - if (newmsg == NULL) { -#if IPSEC_DEBUG - printf("key_get: No more memory.\n"); +/* + * not really an official behavior. discussed in pf_key@inner.net in Sep2000. + * XXX reorder combinations by preference + */ +static struct mbuf * +key_getcomb_ipcomp() +{ + struct sadb_comb *comb; + const struct ipcomp_algorithm *algo; + struct mbuf *m; + int i; + const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); + + m = NULL; + for (i = 1; i <= SADB_X_CALG_MAX; i++) { + algo = ipcomp_algorithm_lookup(i); + if (!algo) + continue; + + if (!m) { +#if DIAGNOSTIC + if (l > MLEN) + panic("assumption failed in key_getcomb_ipcomp"); +#endif + MGET(m, M_DONTWAIT, MT_DATA); + if (m) { + M_ALIGN(m, l); + m->m_len = l; + m->m_next = NULL; + } + } else + M_PREPEND(m, l, M_DONTWAIT); + if (!m) + return NULL; + + comb = mtod(m, struct sadb_comb *); + bzero(comb, sizeof(*comb)); + key_getcomb_setlifetime(comb); + comb->sadb_comb_encrypt = i; + /* what should we set into sadb_comb_*_{min,max}bits? */ + } + + return m; +} + +/* + * XXX no way to pass mode (transport/tunnel) to userland + * XXX replay checking? + * XXX sysctl interface to ipsec_{ah,esp}_keymin + */ +static struct mbuf * +key_getprop(saidx) + const struct secasindex *saidx; +{ + struct sadb_prop *prop; + struct mbuf *m, *n; + const int l = PFKEY_ALIGN8(sizeof(struct sadb_prop)); + int totlen; + + switch (saidx->proto) { +#if IPSEC_ESP + case IPPROTO_ESP: + m = key_getcomb_esp(); + break; #endif - msg0->sadb_msg_errno = ENOBUFS; + case IPPROTO_AH: + m = key_getcomb_ah(); + break; + case IPPROTO_IPCOMP: + m = key_getcomb_ipcomp(); + break; + default: return NULL; } - /* create new sadb_msg to reply. */ - (void)key_setdumpsa(newmsg, sav, SADB_GET, - satype, msg0->sadb_msg_seq, msg0->sadb_msg_pid); + if (!m) + return NULL; + M_PREPEND(m, l, M_DONTWAIT); + if (!m) + return NULL; - return newmsg; - } + totlen = 0; + for (n = m; n; n = n->m_next) + totlen += n->m_len; + + prop = mtod(m, struct sadb_prop *); + bzero(prop, sizeof(*prop)); + prop->sadb_prop_len = PFKEY_UNIT64(totlen); + prop->sadb_prop_exttype = SADB_EXT_PROPOSAL; + prop->sadb_prop_replay = 32; /* XXX */ + + return m; } /* * SADB_ACQUIRE processing called by key_checkrequest() and key_acquire2(). * send - * * to KMD, and expect to receive - * with SADB_ACQUIRE if error occured, + * with SADB_ACQUIRE if error occurred, * or * with SADB_GETSPI * from KMD by PF_KEY. * - * sensitivity is not supported. + * XXX x_policy is outside of RFC2367 (KAME extension). + * XXX sensitivity is not supported. + * XXX for ipcomp, RFC2367 does not define how to fill in proposal. + * see comment for key_getcomb_ipcomp(). * * OUT: * 0 : succeed @@ -5081,21 +6006,22 @@ key_acquire(saidx, sp) struct secasindex *saidx; struct secpolicy *sp; { + struct mbuf *result = NULL, *m; #ifndef IPSEC_NONBLOCK_ACQUIRE struct secacq *newacq; #endif - struct secpolicyindex *spidx = NULL; u_int8_t satype; - int error; + int error = -1; + u_int32_t seq; + + lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_OWNED); /* sanity check */ - if (saidx == NULL || sp == NULL) + if (saidx == NULL) panic("key_acquire: NULL pointer is passed.\n"); if ((satype = key_proto2satype(saidx->proto)) == 0) panic("key_acquire: invalid proto is passed.\n"); - spidx = &sp->spidx; - #ifndef IPSEC_NONBLOCK_ACQUIRE /* * We never do anything about acquirng SA. There is anather @@ -5118,129 +6044,55 @@ key_acquire(saidx, sp) if ((newacq = key_newacq(saidx)) == NULL) return ENOBUFS; - /* add to acqtree */ - LIST_INSERT_HEAD(&acqtree, newacq, chain); - } -#endif - - { - struct sadb_msg *newmsg = NULL; - union sadb_x_ident_id id; - u_int len; - caddr_t p; - - /* create new sadb_msg to reply. */ - len = sizeof(struct sadb_msg) - + sizeof(struct sadb_address) - + PFKEY_ALIGN8(saidx->src.ss_len) - + sizeof(struct sadb_address) - + PFKEY_ALIGN8(saidx->dst.ss_len) - + sizeof(struct sadb_x_policy) - + sizeof(struct sadb_ident) - + PFKEY_ALIGN8(spidx->src.ss_len) - + sizeof(struct sadb_ident) - + PFKEY_ALIGN8(spidx->dst.ss_len) - + sizeof(struct sadb_prop) - + sizeof(struct sadb_comb); /* XXX to be multiple */ - - KMALLOC(newmsg, struct sadb_msg *, len); - if (newmsg == 0) { -#if IPSEC_DEBUG - printf("key_acquire: No more memory.\n"); -#endif - return ENOBUFS; + /* add to acqtree */ + LIST_INSERT_HEAD(&acqtree, newacq, chain); } - bzero((caddr_t)newmsg, len); +#endif - newmsg->sadb_msg_version = PF_KEY_V2; - newmsg->sadb_msg_type = SADB_ACQUIRE; - newmsg->sadb_msg_errno = 0; - newmsg->sadb_msg_satype = satype; - newmsg->sadb_msg_len = PFKEY_UNIT64(len); - newmsg->sadb_msg_mode = saidx->mode; - newmsg->sadb_msg_reqid = saidx->reqid; #ifndef IPSEC_NONBLOCK_ACQUIRE - newmsg->sadb_msg_seq = newacq->seq; + seq = newacq->seq; #else - newmsg->sadb_msg_seq = (acq_seq = (acq_seq == ~0 ? 1 : ++acq_seq)); + seq = (acq_seq = (acq_seq == ~0 ? 1 : ++acq_seq)); #endif - - newmsg->sadb_msg_pid = 0; - - p = (caddr_t)newmsg + sizeof(struct sadb_msg); + m = key_setsadbmsg(SADB_ACQUIRE, 0, satype, seq, 0, 0); + if (!m) { + error = ENOBUFS; + goto fail; + } + result = m; /* set sadb_address for saidx's. */ - p = key_setsadbaddr(p, - SADB_EXT_ADDRESS_SRC, - (struct sockaddr *)&saidx->src, - _INALENBYAF(saidx->src.ss_family) << 3, - IPSEC_ULPROTO_ANY); - p = key_setsadbaddr(p, - SADB_EXT_ADDRESS_DST, - (struct sockaddr *)&saidx->dst, - _INALENBYAF(saidx->dst.ss_family) << 3, - IPSEC_ULPROTO_ANY); + m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, + (struct sockaddr *)&saidx->src, FULLMASK, IPSEC_ULPROTO_ANY); + if (!m) { + error = ENOBUFS; + goto fail; + } + m_cat(result, m); - /* set sadb_x_policy */ - p = key_setsadbxpolicy(p, sp->policy, sp->spidx.dir, sp->id); - - /* set sadb_address for spidx's. */ - bzero(&id, sizeof(id)); - id.sadb_x_ident_id_addr.prefix = spidx->prefs; - id.sadb_x_ident_id_addr.ul_proto = spidx->ul_proto; - p = key_setsadbident(p, - SADB_EXT_IDENTITY_SRC, - SADB_X_IDENTTYPE_ADDR, - (caddr_t)&spidx->src, - spidx->src.ss_len, - *(u_int64_t *)&id); - - bzero(&id, sizeof(id)); - id.sadb_x_ident_id_addr.prefix = spidx->prefd; - id.sadb_x_ident_id_addr.ul_proto = spidx->ul_proto; - p = key_setsadbident(p, - SADB_EXT_IDENTITY_DST, - SADB_X_IDENTTYPE_ADDR, - (caddr_t)&spidx->dst, - spidx->dst.ss_len, - *(u_int64_t *)&id); - - /* create proposal extension */ - /* set combination extension */ - /* XXX: to be defined by proposal database */ - { - struct sadb_prop *prop; - struct sadb_comb *comb; + m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, + (struct sockaddr *)&saidx->dst, FULLMASK, IPSEC_ULPROTO_ANY); + if (!m) { + error = ENOBUFS; + goto fail; + } + m_cat(result, m); - prop = (struct sadb_prop *)p; - prop->sadb_prop_len = PFKEY_UNIT64(sizeof(*prop) + sizeof(*comb)); - /* XXX to be multiple */ - prop->sadb_prop_exttype = SADB_EXT_PROPOSAL; - prop->sadb_prop_replay = 32; /* XXX be variable ? */ - p += sizeof(struct sadb_prop); - - comb = (struct sadb_comb *)p; - comb->sadb_comb_auth = SADB_AALG_SHA1HMAC; /* XXX ??? */ - comb->sadb_comb_encrypt = SADB_EALG_DESCBC; /* XXX ??? */ - comb->sadb_comb_flags = 0; - comb->sadb_comb_auth_minbits = 8; /* XXX */ - comb->sadb_comb_auth_maxbits = 1024; /* XXX */ - comb->sadb_comb_encrypt_minbits = 64; /* XXX */ - comb->sadb_comb_encrypt_maxbits = 64; /* XXX */ - comb->sadb_comb_soft_allocations = 0; - comb->sadb_comb_hard_allocations = 0; - comb->sadb_comb_soft_bytes = 0; - comb->sadb_comb_hard_bytes = 0; - comb->sadb_comb_soft_addtime = 0; - comb->sadb_comb_hard_addtime = 0; - comb->sadb_comb_soft_usetime = 0; - comb->sadb_comb_hard_usetime = 0; + /* XXX proxy address (optional) */ - p += sizeof(*comb); - } + /* set sadb_x_policy */ + if (sp) { + m = key_setsadbxpolicy(sp->policy, sp->spidx.dir, sp->id); + if (!m) { + error = ENOBUFS; + goto fail; + } + m_cat(result, m); + } -#if 0 /* XXX Do it ?*/ + /* XXX identity (optional) */ +#if 0 if (idexttype && fqdn) { /* create identity extension (FQDN) */ struct sadb_ident *id; @@ -5280,15 +6132,55 @@ key_acquire(saidx, sp) } #endif - error = key_sendall(newmsg, len); -#if IPSEC_DEBUG - if (error != 0) - printf("key_acquire: key_sendall returned %d\n", error); + /* XXX sensitivity (optional) */ + + /* create proposal/combination extension */ + m = key_getprop(saidx); +#if 0 + /* + * spec conformant: always attach proposal/combination extension, + * the problem is that we have no way to attach it for ipcomp, + * due to the way sadb_comb is declared in RFC2367. + */ + if (!m) { + error = ENOBUFS; + goto fail; + } + m_cat(result, m); +#else + /* + * outside of spec; make proposal/combination extension optional. + */ + if (m) + m_cat(result, m); #endif - return error; - } - return 0; + if ((result->m_flags & M_PKTHDR) == 0) { + error = EINVAL; + goto fail; + } + + if (result->m_len < sizeof(struct sadb_msg)) { + result = m_pullup(result, sizeof(struct sadb_msg)); + if (result == NULL) { + error = ENOBUFS; + goto fail; + } + } + + result->m_pkthdr.len = 0; + for (m = result; m; m = m->m_next) + result->m_pkthdr.len += m->m_len; + + mtod(result, struct sadb_msg *)->sadb_msg_len = + PFKEY_UNIT64(result->m_pkthdr.len); + + return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); + + fail: + if (result) + m_freem(result); + return error; } #ifndef IPSEC_NONBLOCK_ACQUIRE @@ -5297,13 +6189,12 @@ key_newacq(saidx) struct secasindex *saidx; { struct secacq *newacq; + struct timeval tv; /* get new entry */ KMALLOC(newacq, struct secacq *, sizeof(struct secacq)); if (newacq == NULL) { -#if IPSEC_DEBUG - printf("key_newacq: No more memory.\n"); -#endif + ipseclog((LOG_DEBUG, "key_newacq: No more memory.\n")); return NULL; } bzero(newacq, sizeof(*newacq)); @@ -5311,7 +6202,8 @@ key_newacq(saidx) /* copy secindex */ bcopy(saidx, &newacq->saidx, sizeof(newacq->saidx)); newacq->seq = (acq_seq == ~0 ? 1 : ++acq_seq); - newacq->tick = 0; + microtime(&tv); + newacq->created = tv.tv_sec; newacq->count = 0; return newacq; @@ -5323,8 +6215,10 @@ key_getacq(saidx) { struct secacq *acq; + lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_OWNED); + LIST_FOREACH(acq, &acqtree, chain) { - if (key_cmpsaidx_exactly(saidx, &acq->saidx)) + if (key_cmpsaidx(saidx, &acq->saidx, CMP_EXACTLY)) return acq; } @@ -5337,6 +6231,8 @@ key_getacqbyseq(seq) { struct secacq *acq; + lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_OWNED); + LIST_FOREACH(acq, &acqtree, chain) { if (acq->seq == seq) return acq; @@ -5351,20 +6247,20 @@ key_newspacq(spidx) struct secpolicyindex *spidx; { struct secspacq *acq; + struct timeval tv; /* get new entry */ KMALLOC(acq, struct secspacq *, sizeof(struct secspacq)); if (acq == NULL) { -#if IPSEC_DEBUG - printf("key_newspacq: No more memory.\n"); -#endif + ipseclog((LOG_DEBUG, "key_newspacq: No more memory.\n")); return NULL; } bzero(acq, sizeof(*acq)); /* copy secindex */ bcopy(spidx, &acq->spidx, sizeof(acq->spidx)); - acq->tick = 0; + microtime(&tv); + acq->created = tv.tv_sec; acq->count = 0; return acq; @@ -5376,6 +6272,8 @@ key_getspacq(spidx) { struct secspacq *acq; + lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_OWNED); + LIST_FOREACH(acq, &spacqtree, chain) { if (key_cmpspidx_exactly(spidx, &acq->spidx)) return acq; @@ -5396,59 +6294,60 @@ key_getspacq(spidx) * * to the socket. * - * IN: mhp: pointer to the pointer to each header. - * OUT: NULL if fail. - * other if success, return pointer to the message to send. + * m will always be freed. */ -static struct sadb_msg * -key_acquire2(mhp) - caddr_t *mhp; +static int +key_acquire2(so, m, mhp) + struct socket *so; + struct mbuf *m; + const struct sadb_msghdr *mhp; { - struct sadb_msg *msg0; - struct sadb_address *src0, *dst0; + const struct sadb_address *src0, *dst0; struct secasindex saidx; struct secashead *sah; u_int16_t proto; + int error; + + lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_OWNED); /* sanity check */ - if (mhp == NULL || mhp[0] == NULL) + if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) panic("key_acquire2: NULL pointer is passed.\n"); - msg0 = (struct sadb_msg *)mhp[0]; - /* * Error message from KMd. - * We assume that if error was occured in IKEd, the length of PFKEY + * We assume that if error was occurred in IKEd, the length of PFKEY * message is equal to the size of sadb_msg structure. - * We return ~0 even if error occured in this function. + * We do not raise error even if error occurred in this function. */ - if (msg0->sadb_msg_len == PFKEY_UNIT64(sizeof(struct sadb_msg))) { - + if (mhp->msg->sadb_msg_len == PFKEY_UNIT64(sizeof(struct sadb_msg))) { #ifndef IPSEC_NONBLOCK_ACQUIRE struct secacq *acq; + struct timeval tv; /* check sequence number */ - if (msg0->sadb_msg_seq == 0) { -#if IPSEC_DEBUG - printf("key_acquire2: must specify sequence number.\n"); -#endif - return (struct sadb_msg *)~0; + if (mhp->msg->sadb_msg_seq == 0) { + ipseclog((LOG_DEBUG, "key_acquire2: must specify sequence number.\n")); + m_freem(m); + return 0; } - if ((acq = key_getacqbyseq(msg0->sadb_msg_seq)) == NULL) { -#if IPSEC_DEBUG - printf("key_acquire2: " - "invalid sequence number is passed.\n"); -#endif - return (struct sadb_msg *)~0; + if ((acq = key_getacqbyseq(mhp->msg->sadb_msg_seq)) == NULL) { + /* + * the specified larval SA is already gone, or we got + * a bogus sequence number. we can silently ignore it. + */ + m_freem(m); + return 0; } /* reset acq counter in order to deletion by timehander. */ - acq->tick = key_blockacq_lifetime; + microtime(&tv); + acq->created = tv.tv_sec; acq->count = 0; #endif - return (struct sadb_msg *)~0; - /* NOTREACHED */ + m_freem(m); + return 0; } /* @@ -5456,68 +6355,52 @@ key_acquire2(mhp) */ /* map satype to proto */ - if ((proto = key_satype2proto(msg0->sadb_msg_satype)) == 0) { -#if IPSEC_DEBUG - printf("key_acquire2: invalid satype is passed.\n"); -#endif - msg0->sadb_msg_errno = EINVAL; - return NULL; + if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { + ipseclog((LOG_DEBUG, "key_acquire2: invalid satype is passed.\n")); + return key_senderror(so, m, EINVAL); } - if (mhp[SADB_EXT_ADDRESS_SRC] == NULL - || mhp[SADB_EXT_ADDRESS_DST] == NULL - || mhp[SADB_EXT_PROPOSAL] == NULL) { + if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || + mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || + mhp->ext[SADB_EXT_PROPOSAL] == NULL) { /* error */ -#if IPSEC_DEBUG - printf("key_acquire2: invalid message is passed.\n"); -#endif - msg0->sadb_msg_errno = EINVAL; - return NULL; + ipseclog((LOG_DEBUG, "key_acquire2: invalid message is passed.\n")); + return key_senderror(so, m, EINVAL); + } + if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || + mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || + mhp->extlen[SADB_EXT_PROPOSAL] < sizeof(struct sadb_prop)) { + /* error */ + ipseclog((LOG_DEBUG, "key_acquire2: invalid message is passed.\n")); + return key_senderror(so, m, EINVAL); } - src0 = (struct sadb_address *)(mhp[SADB_EXT_ADDRESS_SRC]); - dst0 = (struct sadb_address *)(mhp[SADB_EXT_ADDRESS_DST]); - KEY_SETSECASIDX(proto, msg0, src0+1, dst0+1, &saidx); + src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; + dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; + + /* XXX boundary check against sa_len */ + KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx); /* get a SA index */ - if ((sah = key_getsah(&saidx)) != NULL) { -#if IPSEC_DEBUG - printf("key_acquire2: a SA exists already.\n"); -#endif - msg0->sadb_msg_errno = EEXIST; - return NULL; + LIST_FOREACH(sah, &sahtree, chain) { + if (sah->state == SADB_SASTATE_DEAD) + continue; + if (key_cmpsaidx(&sah->saidx, &saidx, CMP_MODE_REQID)) + break; } - - msg0->sadb_msg_errno = key_acquire(&saidx, NULL); - if (msg0->sadb_msg_errno != 0) { -#if IPSEC_DEBUG - printf("key_acquire2: error %d returned " - "from key_acquire.\n", msg0->sadb_msg_errno); -#endif - return NULL; + if (sah != NULL) { + ipseclog((LOG_DEBUG, "key_acquire2: a SA exists already.\n")); + return key_senderror(so, m, EEXIST); } - { - struct sadb_msg *newmsg; - u_int len; - - /* create new sadb_msg to reply. */ - len = PFKEY_UNUNIT64(msg0->sadb_msg_len); - - KMALLOC(newmsg, struct sadb_msg *, len); - if (newmsg == NULL) { -#if IPSEC_DEBUG - printf("key_acquire2: No more memory.\n"); -#endif - msg0->sadb_msg_errno = ENOBUFS; - return NULL; + error = key_acquire(&saidx, NULL); + if (error != 0) { + ipseclog((LOG_DEBUG, "key_acquire2: error %d returned " + "from key_acquire.\n", mhp->msg->sadb_msg_errno)); + return key_senderror(so, m, error); } - bzero((caddr_t)newmsg, len); - - bcopy(mhp[0], (caddr_t)newmsg, len); - return newmsg; - } + return key_sendup_mbuf(so, m, KEY_SENDUP_REGISTERED); } /* @@ -5530,155 +6413,171 @@ key_acquire2(mhp) * * to KMD by PF_KEY. * If socket is detached, must free from regnode. - * OUT: - * 0 : succeed - * others: error number + * + * m will always be freed. */ -static struct sadb_msg * -key_register(mhp, so) - caddr_t *mhp; +static int +key_register(so, m, mhp) struct socket *so; + struct mbuf *m; + const struct sadb_msghdr *mhp; { - struct sadb_msg *msg0; struct secreg *reg, *newreg = 0; + lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_OWNED); + /* sanity check */ - if (mhp == NULL || so == NULL || mhp[0] == NULL) + if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) panic("key_register: NULL pointer is passed.\n"); - msg0 = (struct sadb_msg *)mhp[0]; - /* check for invalid register message */ - if (msg0->sadb_msg_satype >= sizeof(regtree)/sizeof(regtree[0])) { - msg0->sadb_msg_errno = EINVAL; - return NULL; - } + if (mhp->msg->sadb_msg_satype >= sizeof(regtree)/sizeof(regtree[0])) + return key_senderror(so, m, EINVAL); /* When SATYPE_UNSPEC is specified, only return sabd_supported. */ - if (msg0->sadb_msg_satype == SADB_SATYPE_UNSPEC) + if (mhp->msg->sadb_msg_satype == SADB_SATYPE_UNSPEC) goto setmsg; /* check whether existing or not */ - LIST_FOREACH(reg, ®tree[msg0->sadb_msg_satype], chain) { + LIST_FOREACH(reg, ®tree[mhp->msg->sadb_msg_satype], chain) { if (reg->so == so) { -#if IPSEC_DEBUG - printf("key_register: socket exists already.\n"); -#endif - msg0->sadb_msg_errno = EEXIST; - return NULL; + ipseclog((LOG_DEBUG, "key_register: socket exists already.\n")); + return key_senderror(so, m, EEXIST); } } /* create regnode */ - KMALLOC(newreg, struct secreg *, sizeof(struct secreg)); + KMALLOC(newreg, struct secreg *, sizeof(*newreg)); if (newreg == NULL) { -#if IPSEC_DEBUG - printf("key_register: No more memory.\n"); -#endif - msg0->sadb_msg_errno = ENOBUFS; - return NULL; + ipseclog((LOG_DEBUG, "key_register: No more memory.\n")); + return key_senderror(so, m, ENOBUFS); } - bzero((caddr_t)newreg, sizeof(struct secreg)); + bzero((caddr_t)newreg, sizeof(*newreg)); + socket_lock(so, 1); newreg->so = so; ((struct keycb *)sotorawcb(so))->kp_registered++; + socket_unlock(so, 1); /* add regnode to regtree. */ - LIST_INSERT_HEAD(®tree[msg0->sadb_msg_satype], newreg, chain); + LIST_INSERT_HEAD(®tree[mhp->msg->sadb_msg_satype], newreg, chain); setmsg: - { + { + struct mbuf *n; struct sadb_msg *newmsg; struct sadb_supported *sup; u_int len, alen, elen; - caddr_t p; + int off; + int i; + struct sadb_alg *alg; /* create new sadb_msg to reply. */ - alen = sizeof(struct sadb_supported) - + ((SADB_AALG_MAX - 1) * sizeof(struct sadb_alg)); - -#if IPSEC_ESP - elen = sizeof(struct sadb_supported) - + ((SADB_EALG_MAX - 1) * sizeof(struct sadb_alg)); -#else + alen = 0; + for (i = 1; i <= SADB_AALG_MAX; i++) { + if (ah_algorithm_lookup(i)) + alen += sizeof(struct sadb_alg); + } + if (alen) + alen += sizeof(struct sadb_supported); elen = 0; +#if IPSEC_ESP + for (i = 1; i <= SADB_EALG_MAX; i++) { + if (esp_algorithm_lookup(i)) + elen += sizeof(struct sadb_alg); + } + if (elen) + elen += sizeof(struct sadb_supported); #endif - len = sizeof(struct sadb_msg) - + alen - + elen; + len = sizeof(struct sadb_msg) + alen + elen; - KMALLOC(newmsg, struct sadb_msg *, len); - if (newmsg == NULL) { -#if IPSEC_DEBUG - printf("key_register: No more memory.\n"); -#endif - msg0->sadb_msg_errno = ENOBUFS; - return NULL; + if (len > MCLBYTES) + return key_senderror(so, m, ENOBUFS); + + MGETHDR(n, M_DONTWAIT, MT_DATA); + if (len > MHLEN) { + MCLGET(n, M_DONTWAIT); + if ((n->m_flags & M_EXT) == 0) { + m_freem(n); + n = NULL; + } } - bzero((caddr_t)newmsg, len); + if (!n) + return key_senderror(so, m, ENOBUFS); + + n->m_pkthdr.len = n->m_len = len; + n->m_next = NULL; + off = 0; - bcopy((caddr_t)mhp[0], (caddr_t)newmsg, sizeof(*msg0)); + m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, caddr_t) + off); + newmsg = mtod(n, struct sadb_msg *); newmsg->sadb_msg_errno = 0; newmsg->sadb_msg_len = PFKEY_UNIT64(len); - p = (caddr_t)newmsg + sizeof(*msg0); + off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); /* for authentication algorithm */ - sup = (struct sadb_supported *)p; - sup->sadb_supported_len = PFKEY_UNIT64(alen); - sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH; - p += sizeof(*sup); + if (alen) { + sup = (struct sadb_supported *)(mtod(n, caddr_t) + off); + sup->sadb_supported_len = PFKEY_UNIT64(alen); + sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH; + off += PFKEY_ALIGN8(sizeof(*sup)); - { - int i; - struct sadb_alg *alg; - struct ah_algorithm *algo; + for (i = 1; i <= SADB_AALG_MAX; i++) { + const struct ah_algorithm *aalgo; - for (i = 1; i < SADB_AALG_MAX; i++) { - algo = &ah_algorithms[i]; - alg = (struct sadb_alg *)p; - alg->sadb_alg_id = i; - alg->sadb_alg_ivlen = 0; - alg->sadb_alg_minbits = algo->keymin; - alg->sadb_alg_maxbits = algo->keymax; - p += sizeof(struct sadb_alg); + aalgo = ah_algorithm_lookup(i); + if (!aalgo) + continue; + alg = (struct sadb_alg *)(mtod(n, caddr_t) + off); + alg->sadb_alg_id = i; + alg->sadb_alg_ivlen = 0; + alg->sadb_alg_minbits = aalgo->keymin; + alg->sadb_alg_maxbits = aalgo->keymax; + off += PFKEY_ALIGN8(sizeof(*alg)); + } } - } #if IPSEC_ESP /* for encryption algorithm */ - sup = (struct sadb_supported *)p; - sup->sadb_supported_len = PFKEY_UNIT64(elen); - sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT; - p += sizeof(*sup); - - { - int i; - struct sadb_alg *alg; - struct esp_algorithm *algo; + if (elen) { + sup = (struct sadb_supported *)(mtod(n, caddr_t) + off); + sup->sadb_supported_len = PFKEY_UNIT64(elen); + sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT; + off += PFKEY_ALIGN8(sizeof(*sup)); - for (i = 1; i < SADB_EALG_MAX; i++) { - algo = &esp_algorithms[i]; + for (i = 1; i <= SADB_EALG_MAX; i++) { + const struct esp_algorithm *ealgo; - alg = (struct sadb_alg *)p; - alg->sadb_alg_id = i; - if (algo && algo->ivlen) { - /* - * give NULL to get the value preferred by algorithm - * XXX SADB_X_EXT_DERIV ? - */ - alg->sadb_alg_ivlen = (*algo->ivlen)(NULL); - } else - alg->sadb_alg_ivlen = 0; - alg->sadb_alg_minbits = algo->keymin; - alg->sadb_alg_maxbits = algo->keymax; - p += sizeof(struct sadb_alg); + ealgo = esp_algorithm_lookup(i); + if (!ealgo) + continue; + alg = (struct sadb_alg *)(mtod(n, caddr_t) + off); + alg->sadb_alg_id = i; + if (ealgo && ealgo->ivlen) { + /* + * give NULL to get the value preferred by + * algorithm XXX SADB_X_EXT_DERIV ? + */ + alg->sadb_alg_ivlen = + (*ealgo->ivlen)(ealgo, NULL); + } else + alg->sadb_alg_ivlen = 0; + alg->sadb_alg_minbits = ealgo->keymin; + alg->sadb_alg_maxbits = ealgo->keymax; + off += PFKEY_ALIGN8(sizeof(struct sadb_alg)); + } } - } #endif - return newmsg; - } +#if DIGAGNOSTIC + if (off != len) + panic("length assumption failed in key_register"); +#endif + + m_freem(m); + return key_sendup_mbuf(so, n, KEY_SENDUP_REGISTERED); + } } /* @@ -5692,6 +6591,8 @@ key_freereg(so) struct secreg *reg; int i; + lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_OWNED); + /* sanity check */ if (so == NULL) panic("key_freereg: NULL pointer is passed.\n"); @@ -5718,7 +6619,7 @@ key_freereg(so) /* * SADB_EXPIRE processing * send - * + * * to KMD by PF_KEY. * NOTE: We send only soft lifetime extension. * @@ -5731,13 +6632,12 @@ key_expire(sav) { int s; int satype; + struct mbuf *result = NULL, *m; + int len; + int error = -1; + struct sadb_lifetime *lt; - /* XXX: Why do we lock ? */ -#ifdef __NetBSD__ - s = splsoftnet(); /*called from softclock()*/ -#else - s = splnet(); /*called from softclock()*/ -#endif + lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_OWNED); /* sanity check */ if (sav == NULL) @@ -5747,76 +6647,101 @@ key_expire(sav) if ((satype = key_proto2satype(sav->sah->saidx.proto)) == 0) panic("key_expire: invalid proto is passed.\n"); - { - struct sadb_msg *newmsg = NULL; - u_int len; - caddr_t p; - int error; - - /* create new sadb_msg to reply. */ - len = sizeof(struct sadb_msg) - + sizeof(struct sadb_sa) - + sizeof(struct sadb_lifetime) - + sizeof(struct sadb_lifetime) - + sizeof(struct sadb_address) - + PFKEY_ALIGN8(sav->sah->saidx.src.ss_len) - + sizeof(struct sadb_address) - + PFKEY_ALIGN8(sav->sah->saidx.dst.ss_len); - - KMALLOC(newmsg, struct sadb_msg *, len); - if (newmsg == NULL) { -#if IPSEC_DEBUG - printf("key_expire: No more memory.\n"); -#endif - splx(s); - return ENOBUFS; + /* set msg header */ + m = key_setsadbmsg(SADB_EXPIRE, 0, satype, sav->seq, 0, sav->refcnt); + if (!m) { + error = ENOBUFS; + goto fail; } - bzero((caddr_t)newmsg, len); + result = m; - /* set msg header */ - p = key_setsadbmsg((caddr_t)newmsg, SADB_EXPIRE, len, - satype, sav->seq, 0, - sav->sah->saidx.mode, sav->sah->saidx.reqid, - 0, sav->refcnt); + /* create SA extension */ + m = key_setsadbsa(sav); + if (!m) { + error = ENOBUFS; + goto fail; + } + m_cat(result, m); /* create SA extension */ - p = key_setsadbsa(p, sav); + m = key_setsadbxsa2(sav->sah->saidx.mode, + sav->replay ? sav->replay->count : 0, + sav->sah->saidx.reqid); + if (!m) { + error = ENOBUFS; + goto fail; + } + m_cat(result, m); - /* create lifetime extension */ - { - struct sadb_lifetime *m_lt = (struct sadb_lifetime *)p; - - m_lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); - m_lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; - m_lt->sadb_lifetime_allocations = sav->lft_c->sadb_lifetime_allocations; - m_lt->sadb_lifetime_bytes = sav->lft_c->sadb_lifetime_bytes; - m_lt->sadb_lifetime_addtime = sav->lft_c->sadb_lifetime_addtime; - m_lt->sadb_lifetime_usetime = sav->lft_c->sadb_lifetime_usetime; - p += sizeof(struct sadb_lifetime); - - /* copy SOFT lifetime extension. */ - bcopy(sav->lft_s, p, sizeof(struct sadb_lifetime)); - p += sizeof(struct sadb_lifetime); - } + /* create lifetime extension (current and soft) */ + len = PFKEY_ALIGN8(sizeof(*lt)) * 2; + m = key_alloc_mbuf(len); + if (!m || m->m_next) { /*XXX*/ + if (m) + m_freem(m); + error = ENOBUFS; + goto fail; + } + bzero(mtod(m, caddr_t), len); + lt = mtod(m, struct sadb_lifetime *); + lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); + lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; + lt->sadb_lifetime_allocations = sav->lft_c->sadb_lifetime_allocations; + lt->sadb_lifetime_bytes = sav->lft_c->sadb_lifetime_bytes; + lt->sadb_lifetime_addtime = sav->lft_c->sadb_lifetime_addtime; + lt->sadb_lifetime_usetime = sav->lft_c->sadb_lifetime_usetime; + lt = (struct sadb_lifetime *)(mtod(m, caddr_t) + len / 2); + bcopy(sav->lft_s, lt, sizeof(*lt)); + m_cat(result, m); /* set sadb_address for source */ - p = key_setsadbaddr(p, - SADB_EXT_ADDRESS_SRC, - (struct sockaddr *)&sav->sah->saidx.src, - _INALENBYAF(sav->sah->saidx.src.ss_family) << 3, - IPSEC_ULPROTO_ANY); + m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, + (struct sockaddr *)&sav->sah->saidx.src, + FULLMASK, IPSEC_ULPROTO_ANY); + if (!m) { + error = ENOBUFS; + goto fail; + } + m_cat(result, m); /* set sadb_address for destination */ - p = key_setsadbaddr(p, - SADB_EXT_ADDRESS_DST, - (struct sockaddr *)&sav->sah->saidx.dst, - _INALENBYAF(sav->sah->saidx.dst.ss_family) << 3, - IPSEC_ULPROTO_ANY); + m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, + (struct sockaddr *)&sav->sah->saidx.dst, + FULLMASK, IPSEC_ULPROTO_ANY); + if (!m) { + error = ENOBUFS; + goto fail; + } + m_cat(result, m); + + if ((result->m_flags & M_PKTHDR) == 0) { + error = EINVAL; + goto fail; + } + + if (result->m_len < sizeof(struct sadb_msg)) { + result = m_pullup(result, sizeof(struct sadb_msg)); + if (result == NULL) { + error = ENOBUFS; + goto fail; + } + } + + result->m_pkthdr.len = 0; + for (m = result; m; m = m->m_next) + result->m_pkthdr.len += m->m_len; - error = key_sendall(newmsg, len); + mtod(result, struct sadb_msg *)->sadb_msg_len = + PFKEY_UNIT64(result->m_pkthdr.len); + + splx(s); + return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); + + fail: + if (result) + m_freem(result); splx(s); return error; - } } /* @@ -5829,51 +6754,46 @@ key_expire(sav) * to the ikmpd. * NOTE: to do is only marking SADB_SASTATE_DEAD. * - * IN: mhp: pointer to the pointer to each header. - * OUT: NULL if fail. - * other if success, return pointer to the message to send. + * m will always be freed. */ -static struct sadb_msg * -key_flush(mhp) - caddr_t *mhp; +static int +key_flush(so, m, mhp) + struct socket *so; + struct mbuf *m; + const struct sadb_msghdr *mhp; { - struct sadb_msg *msg0; + struct sadb_msg *newmsg; struct secashead *sah, *nextsah; struct secasvar *sav, *nextsav; u_int16_t proto; u_int8_t state; u_int stateidx; + lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_OWNED); + /* sanity check */ - if (mhp == NULL || mhp[0] == NULL) + if (so == NULL || mhp == NULL || mhp->msg == NULL) panic("key_flush: NULL pointer is passed.\n"); - msg0 = (struct sadb_msg *)mhp[0]; - /* map satype to proto */ - if ((proto = key_satype2proto(msg0->sadb_msg_satype)) == 0) { -#if IPSEC_DEBUG - printf("key_flush: invalid satype is passed.\n"); -#endif - msg0->sadb_msg_errno = EINVAL; - return NULL; + if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { + ipseclog((LOG_DEBUG, "key_flush: invalid satype is passed.\n")); + return key_senderror(so, m, EINVAL); } /* no SATYPE specified, i.e. flushing all SA. */ for (sah = LIST_FIRST(&sahtree); sah != NULL; sah = nextsah) { - nextsah = LIST_NEXT(sah, chain); - if (msg0->sadb_msg_satype != SADB_SATYPE_UNSPEC + if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC && proto != sah->saidx.proto) continue; for (stateidx = 0; stateidx < _ARRAYLEN(saorder_state_alive); stateidx++) { - state = saorder_state_any[stateidx]; for (sav = LIST_FIRST(&sah->savtree[state]); sav != NULL; @@ -5889,29 +6809,21 @@ key_flush(mhp) sah->state = SADB_SASTATE_DEAD; } - { - struct sadb_msg *newmsg; - u_int len; - - /* create new sadb_msg to reply. */ - len = sizeof(struct sadb_msg); - - KMALLOC(newmsg, struct sadb_msg *, len); - if (newmsg == NULL) { -#if IPSEC_DEBUG - printf("key_flush: No more memory.\n"); -#endif - msg0->sadb_msg_errno = ENOBUFS; - return NULL; + if (m->m_len < sizeof(struct sadb_msg) || + sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) { + ipseclog((LOG_DEBUG, "key_flush: No more memory.\n")); + return key_senderror(so, m, ENOBUFS); } - bzero((caddr_t)newmsg, len); - bcopy((caddr_t)mhp[0], (caddr_t)newmsg, sizeof(*msg0)); + if (m->m_next) + m_freem(m->m_next); + m->m_next = NULL; + m->m_pkthdr.len = m->m_len = sizeof(struct sadb_msg); + newmsg = mtod(m, struct sadb_msg *); newmsg->sadb_msg_errno = 0; - newmsg->sadb_msg_len = PFKEY_UNIT64(len); + newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len); - return newmsg; - } + return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); } /* @@ -5924,52 +6836,46 @@ key_flush(mhp) * ..... * to the ikmpd. * - * IN: mhp: pointer to the pointer to each header. - * OUT: error code. 0 on success. + * m will always be freed. */ static int -key_dump(mhp, so, target) - caddr_t *mhp; +key_dump(so, m, mhp) struct socket *so; - int target; + struct mbuf *m; + const struct sadb_msghdr *mhp; { - struct sadb_msg *msg0; struct secashead *sah; struct secasvar *sav; u_int16_t proto; u_int stateidx; u_int8_t satype; u_int8_t state; - int len, cnt; + int cnt; struct sadb_msg *newmsg; + struct mbuf *n; + + lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_OWNED); /* sanity check */ - if (mhp == NULL || mhp[0] == NULL) + if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) panic("key_dump: NULL pointer is passed.\n"); - msg0 = (struct sadb_msg *)mhp[0]; - /* map satype to proto */ - if ((proto = key_satype2proto(msg0->sadb_msg_satype)) == 0) { -#if IPSEC_DEBUG - printf("key_dump: invalid satype is passed.\n"); -#endif - msg0->sadb_msg_errno = EINVAL; - return NULL; + if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { + ipseclog((LOG_DEBUG, "key_dump: invalid satype is passed.\n")); + return key_senderror(so, m, EINVAL); } /* count sav entries to be sent to the userland. */ cnt = 0; LIST_FOREACH(sah, &sahtree, chain) { - - if (msg0->sadb_msg_satype != SADB_SATYPE_UNSPEC + if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC && proto != sah->saidx.proto) continue; for (stateidx = 0; stateidx < _ARRAYLEN(saorder_state_any); stateidx++) { - state = saorder_state_any[stateidx]; LIST_FOREACH(sav, &sah->savtree[state], chain) { cnt++; @@ -5978,160 +6884,126 @@ key_dump(mhp, so, target) } if (cnt == 0) - return ENOENT; + return key_senderror(so, m, ENOENT); /* send this to the userland, one at a time. */ newmsg = NULL; LIST_FOREACH(sah, &sahtree, chain) { - - if (msg0->sadb_msg_satype != SADB_SATYPE_UNSPEC + if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC && proto != sah->saidx.proto) continue; /* map proto to satype */ if ((satype = key_proto2satype(sah->saidx.proto)) == 0) { -#if IPSEC_DEBUG - printf("key_dump: there was invalid proto in SAD.\n"); -#endif - msg0->sadb_msg_errno = EINVAL; - return NULL; + ipseclog((LOG_DEBUG, "key_dump: there was invalid proto in SAD.\n")); + return key_senderror(so, m, EINVAL); } for (stateidx = 0; stateidx < _ARRAYLEN(saorder_state_any); stateidx++) { - state = saorder_state_any[stateidx]; LIST_FOREACH(sav, &sah->savtree[state], chain) { + n = key_setdumpsa(sav, SADB_DUMP, satype, + --cnt, mhp->msg->sadb_msg_pid); + if (!n) + return key_senderror(so, m, ENOBUFS); - len = key_getmsglen(sav); - KMALLOC(newmsg, struct sadb_msg *, len); - if (newmsg == NULL) { -#if IPSEC_DEBUG - printf("key_dump: No more memory.\n"); -#endif - return ENOBUFS; - } - bzero((caddr_t)newmsg, len); - - --cnt; - (void)key_setdumpsa(newmsg, sav, SADB_DUMP, - satype, cnt, msg0->sadb_msg_pid); - - key_sendup(so, newmsg, len, target); - KFREE(newmsg); - newmsg = NULL; + key_sendup_mbuf(so, n, KEY_SENDUP_ONE); } } } + m_freem(m); return 0; } /* * SADB_X_PROMISC processing + * + * m will always be freed. */ -static void -key_promisc(mhp, so) - caddr_t *mhp; +static int +key_promisc(so, m, mhp) struct socket *so; + struct mbuf *m; + const struct sadb_msghdr *mhp; { - struct sadb_msg *msg0; int olen; + lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_OWNED); + /* sanity check */ - if (mhp == NULL || mhp[0] == NULL) + if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) panic("key_promisc: NULL pointer is passed.\n"); - msg0 = (struct sadb_msg *)mhp[0]; - olen = PFKEY_UNUNIT64(msg0->sadb_msg_len); + olen = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len); if (olen < sizeof(struct sadb_msg)) { - return; +#if 1 + return key_senderror(so, m, EINVAL); +#else + m_freem(m); + return 0; +#endif } else if (olen == sizeof(struct sadb_msg)) { /* enable/disable promisc mode */ struct keycb *kp; - int target = 0; - - target = KEY_SENDUP_ONE; - - if (so == NULL) { - return; - } - if ((kp = (struct keycb *)sotorawcb(so)) == NULL) { - msg0->sadb_msg_errno = EINVAL; - goto sendorig; - } - msg0->sadb_msg_errno = 0; - if (msg0->sadb_msg_satype == 1 || msg0->sadb_msg_satype == 0) { - kp->kp_promisc = msg0->sadb_msg_satype; - } else { - msg0->sadb_msg_errno = EINVAL; - goto sendorig; + + socket_lock(so, 1); + if ((kp = (struct keycb *)sotorawcb(so)) == NULL) + return key_senderror(so, m, EINVAL); + mhp->msg->sadb_msg_errno = 0; + switch (mhp->msg->sadb_msg_satype) { + case 0: + case 1: + kp->kp_promisc = mhp->msg->sadb_msg_satype; + break; + default: + socket_unlock(so, 1); + return key_senderror(so, m, EINVAL); } + socket_unlock(so, 1); /* send the original message back to everyone */ - msg0->sadb_msg_errno = 0; - target = KEY_SENDUP_ALL; -sendorig: - key_sendup(so, msg0, PFKEY_UNUNIT64(msg0->sadb_msg_len), target); + mhp->msg->sadb_msg_errno = 0; + return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); } else { /* send packet as is */ - struct sadb_msg *msg; - int len; - len = olen - sizeof(struct sadb_msg); - KMALLOC(msg, struct sadb_msg *, len); - if (msg == NULL) { - msg0->sadb_msg_errno = ENOBUFS; - key_sendup(so, msg0, PFKEY_UNUNIT64(msg0->sadb_msg_len), - KEY_SENDUP_ONE); /*XXX*/ - } + m_adj(m, PFKEY_ALIGN8(sizeof(struct sadb_msg))); - /* XXX if sadb_msg_seq is specified, send to specific pid */ - key_sendup(so, msg, len, KEY_SENDUP_ALL); - KFREE(msg); + /* TODO: if sadb_msg_seq is specified, send to specific pid */ + return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); } } -/* - * send message to the socket. - * OUT: - * 0 : success - * others : fail - */ -static int -key_sendall(msg, len) - struct sadb_msg *msg; - u_int len; -{ - struct secreg *reg; - int error = 0; - - /* sanity check */ - if (msg == NULL) - panic("key_sendall: NULL pointer is passed.\n"); - - /* search table registerd socket to send a message. */ - LIST_FOREACH(reg, ®tree[msg->sadb_msg_satype], chain) { - error = key_sendup(reg->so, msg, len, KEY_SENDUP_ONE); - if (error != 0) { -#if IPSEC_DEBUG - if (error == ENOBUFS) - printf("key_sendall: No more memory.\n"); - else { - printf("key_sendall: key_sendup returned %d\n", - error); - } -#endif - KFREE(msg); - return error; - } - } - - KFREE(msg); - return 0; -} +static int (*key_typesw[])(struct socket *, struct mbuf *, + const struct sadb_msghdr *) = { + NULL, /* SADB_RESERVED */ + key_getspi, /* SADB_GETSPI */ + key_update, /* SADB_UPDATE */ + key_add, /* SADB_ADD */ + key_delete, /* SADB_DELETE */ + key_get, /* SADB_GET */ + key_acquire2, /* SADB_ACQUIRE */ + key_register, /* SADB_REGISTER */ + NULL, /* SADB_EXPIRE */ + key_flush, /* SADB_FLUSH */ + key_dump, /* SADB_DUMP */ + key_promisc, /* SADB_X_PROMISC */ + NULL, /* SADB_X_PCHANGE */ + key_spdadd, /* SADB_X_SPDUPDATE */ + key_spdadd, /* SADB_X_SPDADD */ + key_spddelete, /* SADB_X_SPDDELETE */ + key_spdget, /* SADB_X_SPDGET */ + NULL, /* SADB_X_SPDACQUIRE */ + key_spddump, /* SADB_X_SPDDUMP */ + key_spdflush, /* SADB_X_SPDFLUSH */ + key_spdadd, /* SADB_X_SPDSETIDX */ + NULL, /* SADB_X_SPDEXPIRE */ + key_spddelete2, /* SADB_X_SPDDELETE2 */ +}; /* * parse sadb_msg buffer to process PFKEYv2, @@ -6145,57 +7017,101 @@ key_sendall(msg, len) * length for buffer to send to user process. */ int -key_parse(msgp, so, targetp) - struct sadb_msg **msgp; +key_parse(m, so) + struct mbuf *m; struct socket *so; - int *targetp; { - struct sadb_msg *msg = *msgp, *newmsg = NULL; - caddr_t mhp[SADB_EXT_MAX + 1]; + struct sadb_msg *msg; + struct sadb_msghdr mh; u_int orglen; int error; + int target; + + lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_OWNED); /* sanity check */ - if (msg == NULL || so == NULL) + if (m == NULL || so == NULL) panic("key_parse: NULL pointer is passed.\n"); +#if 0 /*kdebug_sadb assumes msg in linear buffer*/ KEYDEBUG(KEYDEBUG_KEY_DUMP, - printf("key_parse: passed sadb_msg\n"); + ipseclog((LOG_DEBUG, "key_parse: passed sadb_msg\n")); kdebug_sadb(msg)); +#endif + if (m->m_len < sizeof(struct sadb_msg)) { + m = m_pullup(m, sizeof(struct sadb_msg)); + if (!m) + return ENOBUFS; + } + msg = mtod(m, struct sadb_msg *); orglen = PFKEY_UNUNIT64(msg->sadb_msg_len); + target = KEY_SENDUP_ONE; - if (targetp) - *targetp = KEY_SENDUP_ONE; + if ((m->m_flags & M_PKTHDR) == 0 || + m->m_pkthdr.len != m->m_pkthdr.len) { + ipseclog((LOG_DEBUG, "key_parse: invalid message length.\n")); + pfkeystat.out_invlen++; + error = EINVAL; + goto senderror; + } - /* check version */ if (msg->sadb_msg_version != PF_KEY_V2) { -#if IPSEC_DEBUG - printf("key_parse: PF_KEY version %u is mismatched.\n", - msg->sadb_msg_version); -#endif + ipseclog((LOG_DEBUG, + "key_parse: PF_KEY version %u is mismatched.\n", + msg->sadb_msg_version)); pfkeystat.out_invver++; - msg->sadb_msg_errno = EINVAL; - return orglen; + error = EINVAL; + goto senderror; } - /* check type */ if (msg->sadb_msg_type > SADB_MAX) { -#if IPSEC_DEBUG - printf("key_parse: invalid type %u is passed.\n", - msg->sadb_msg_type); -#endif - msg->sadb_msg_errno = EINVAL; + ipseclog((LOG_DEBUG, "key_parse: invalid type %u is passed.\n", + msg->sadb_msg_type)); pfkeystat.out_invmsgtype++; - return orglen; + error = EINVAL; + goto senderror; + } + + /* for old-fashioned code - should be nuked */ + if (m->m_pkthdr.len > MCLBYTES) { + m_freem(m); + return ENOBUFS; + } + if (m->m_next) { + struct mbuf *n; + + MGETHDR(n, M_DONTWAIT, MT_DATA); + if (n && m->m_pkthdr.len > MHLEN) { + MCLGET(n, M_DONTWAIT); + if ((n->m_flags & M_EXT) == 0) { + m_free(n); + n = NULL; + } + } + if (!n) { + m_freem(m); + return ENOBUFS; + } + m_copydata(m, 0, m->m_pkthdr.len, mtod(n, caddr_t)); + n->m_pkthdr.len = n->m_len = m->m_pkthdr.len; + n->m_next = NULL; + m_freem(m); + m = n; } - /* align message. */ - if (key_align(msg, mhp) != 0) { - msg->sadb_msg_errno = EINVAL; - return orglen; + /* align the mbuf chain so that extensions are in contiguous region. */ + error = key_align(m, &mh); + if (error) + return error; + + if (m->m_next) { /*XXX*/ + m_freem(m); + return ENOBUFS; } + msg = mh.msg; + /* check SA type */ switch (msg->sadb_msg_satype) { case SADB_SATYPE_UNSPEC: @@ -6207,21 +7123,16 @@ key_parse(msgp, so, targetp) case SADB_GET: case SADB_ACQUIRE: case SADB_EXPIRE: -#if IPSEC_DEBUG - printf("key_parse: must specify satype " - "when msg type=%u.\n", - msg->sadb_msg_type); -#endif - msg->sadb_msg_errno = EINVAL; + ipseclog((LOG_DEBUG, "key_parse: must specify satype " + "when msg type=%u.\n", msg->sadb_msg_type)); pfkeystat.out_invsatype++; - return orglen; + error = EINVAL; + goto senderror; } break; case SADB_SATYPE_AH: case SADB_SATYPE_ESP: -#if 1 /*nonstandard*/ case SADB_X_SATYPE_IPCOMP: -#endif switch (msg->sadb_msg_type) { case SADB_X_SPDADD: case SADB_X_SPDDELETE: @@ -6231,94 +7142,113 @@ key_parse(msgp, so, targetp) case SADB_X_SPDSETIDX: case SADB_X_SPDUPDATE: case SADB_X_SPDDELETE2: -#if IPSEC_DEBUG - printf("key_parse: illegal satype=%u\n", - msg->sadb_msg_type); -#endif - msg->sadb_msg_errno = EINVAL; + ipseclog((LOG_DEBUG, "key_parse: illegal satype=%u\n", + msg->sadb_msg_type)); pfkeystat.out_invsatype++; - return orglen; + error = EINVAL; + goto senderror; } break; case SADB_SATYPE_RSVP: case SADB_SATYPE_OSPFV2: case SADB_SATYPE_RIPV2: case SADB_SATYPE_MIP: -#if IPSEC_DEBUG - printf("key_parse: type %u isn't supported.\n", - msg->sadb_msg_satype); -#endif - msg->sadb_msg_errno = EOPNOTSUPP; + ipseclog((LOG_DEBUG, "key_parse: type %u isn't supported.\n", + msg->sadb_msg_satype)); pfkeystat.out_invsatype++; - return orglen; - case 1: /* XXX: What does it do ? */ + error = EOPNOTSUPP; + goto senderror; + case 1: /* XXX: What does it do? */ if (msg->sadb_msg_type == SADB_X_PROMISC) break; /*FALLTHROUGH*/ default: -#if IPSEC_DEBUG - printf("key_parse: invalid type %u is passed.\n", - msg->sadb_msg_satype); -#endif - msg->sadb_msg_errno = EINVAL; + ipseclog((LOG_DEBUG, "key_parse: invalid type %u is passed.\n", + msg->sadb_msg_satype)); pfkeystat.out_invsatype++; - return orglen; + error = EINVAL; + goto senderror; } /* check field of upper layer protocol and address family */ - if (mhp[SADB_EXT_ADDRESS_SRC] != NULL - && mhp[SADB_EXT_ADDRESS_DST] != NULL) { + if (mh.ext[SADB_EXT_ADDRESS_SRC] != NULL + && mh.ext[SADB_EXT_ADDRESS_DST] != NULL) { struct sadb_address *src0, *dst0; - u_int prefix; + u_int plen; - src0 = (struct sadb_address *)(mhp[SADB_EXT_ADDRESS_SRC]); - dst0 = (struct sadb_address *)(mhp[SADB_EXT_ADDRESS_DST]); + src0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_SRC]); + dst0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_DST]); /* check upper layer protocol */ if (src0->sadb_address_proto != dst0->sadb_address_proto) { -#if IPSEC_DEBUG - printf("key_parse: upper layer protocol mismatched.\n"); -#endif - msg->sadb_msg_errno = EINVAL; + ipseclog((LOG_DEBUG, "key_parse: upper layer protocol mismatched.\n")); pfkeystat.out_invaddr++; - return orglen; + error = EINVAL; + goto senderror; } /* check family */ - if (PFKEY_ADDR_SADDR(src0)->sa_family - != PFKEY_ADDR_SADDR(dst0)->sa_family) { -#if IPSEC_DEBUG - printf("key_parse: address family mismatched.\n"); -#endif - msg->sadb_msg_errno = EINVAL; + if (PFKEY_ADDR_SADDR(src0)->sa_family != + PFKEY_ADDR_SADDR(dst0)->sa_family) { + ipseclog((LOG_DEBUG, "key_parse: address family mismatched.\n")); pfkeystat.out_invaddr++; - return orglen; + error = EINVAL; + goto senderror; + } + if (PFKEY_ADDR_SADDR(src0)->sa_len != + PFKEY_ADDR_SADDR(dst0)->sa_len) { + ipseclog((LOG_DEBUG, + "key_parse: address struct size mismatched.\n")); + pfkeystat.out_invaddr++; + error = EINVAL; + goto senderror; } - prefix = _INALENBYAF(PFKEY_ADDR_SADDR(src0)->sa_family) << 3; - - /* check max prefixlen */ - if (prefix < src0->sadb_address_prefixlen - || prefix < dst0->sadb_address_prefixlen) { -#if IPSEC_DEBUG - printf("key_parse: illegal prefixlen.\n"); -#endif - msg->sadb_msg_errno = EINVAL; + switch (PFKEY_ADDR_SADDR(src0)->sa_family) { + case AF_INET: + if (PFKEY_ADDR_SADDR(src0)->sa_len != + sizeof(struct sockaddr_in)) { + pfkeystat.out_invaddr++; + error = EINVAL; + goto senderror; + } + break; + case AF_INET6: + if (PFKEY_ADDR_SADDR(src0)->sa_len != + sizeof(struct sockaddr_in6)) { + pfkeystat.out_invaddr++; + error = EINVAL; + goto senderror; + } + break; + default: + ipseclog((LOG_DEBUG, + "key_parse: unsupported address family.\n")); pfkeystat.out_invaddr++; - return orglen; + error = EAFNOSUPPORT; + goto senderror; } switch (PFKEY_ADDR_SADDR(src0)->sa_family) { case AF_INET: + plen = sizeof(struct in_addr) << 3; + break; case AF_INET6: + plen = sizeof(struct in6_addr) << 3; break; default: -#if IPSEC_DEBUG - printf("key_parse: invalid address family.\n"); -#endif - msg->sadb_msg_errno = EINVAL; + plen = 0; /*fool gcc*/ + break; + } + + /* check max prefix length */ + if (src0->sadb_address_prefixlen > plen || + dst0->sadb_address_prefixlen > plen) { + ipseclog((LOG_DEBUG, + "key_parse: illegal prefixlen.\n")); pfkeystat.out_invaddr++; - return orglen; + error = EINVAL; + goto senderror; } /* @@ -6327,221 +7257,85 @@ key_parse(msgp, so, targetp) */ } - switch (msg->sadb_msg_type) { - case SADB_GETSPI: - if ((newmsg = key_getspi(mhp)) == NULL) - return orglen; - if (targetp) - *targetp = KEY_SENDUP_ALL; - break; - - case SADB_UPDATE: - if ((newmsg = key_update(mhp)) == NULL) - return orglen; - if (targetp) - *targetp = KEY_SENDUP_ALL; - break; - - case SADB_ADD: - if ((newmsg = key_add(mhp)) == NULL) - return orglen; - if (targetp) - *targetp = KEY_SENDUP_ALL; - break; - - case SADB_DELETE: - if ((newmsg = key_delete(mhp)) == NULL) - return orglen; - if (targetp) - *targetp = KEY_SENDUP_ALL; - break; - - case SADB_GET: - if ((newmsg = key_get(mhp)) == NULL) - return orglen; - break; - - case SADB_ACQUIRE: - if ((newmsg = key_acquire2(mhp)) == NULL) - return orglen; - - if (newmsg == (struct sadb_msg *)~0) { - /* - * It's not need to reply because of the message - * that was reporting an error occured from the KMd. - */ - KFREE(msg); - return 0; - } - break; - - case SADB_REGISTER: - if ((newmsg = key_register(mhp, so)) == NULL) - return orglen; -#if 1 - if (targetp) - *targetp = KEY_SENDUP_REGISTERED; -#else - /* send result to all registered sockets */ - KFREE(msg); - key_sendall(newmsg, PFKEY_UNUNIT64(newmsg->sadb_msg_len)); - return 0; -#endif - break; - - case SADB_EXPIRE: -#if IPSEC_DEBUG - printf("key_parse: why is SADB_EXPIRE received ?\n"); -#endif - msg->sadb_msg_errno = EINVAL; - if (targetp) - *targetp = KEY_SENDUP_ALL; - pfkeystat.out_invmsgtype++; - return orglen; - - case SADB_FLUSH: - if ((newmsg = key_flush(mhp)) == NULL) - return orglen; - if (targetp) - *targetp = KEY_SENDUP_ALL; - break; - - case SADB_DUMP: - /* key_dump will call key_sendup() on her own */ - error = key_dump(mhp, so, KEY_SENDUP_ONE); - if (error) { - msg->sadb_msg_errno = error; - return orglen; - } else { - KFREE(msg); - return 0; - } - break; - - case SADB_X_PROMISC: - /* everything is handled in key_promisc() */ - key_promisc(mhp, so); - KFREE(msg); - return 0; /*nothing to reply*/ - - case SADB_X_PCHANGE: -#if IPSEC_DEBUG - printf("key_parse: SADB_X_PCHANGE isn't supported.\n"); -#endif - msg->sadb_msg_errno = EINVAL; + if (msg->sadb_msg_type >= sizeof(key_typesw)/sizeof(key_typesw[0]) || + key_typesw[msg->sadb_msg_type] == NULL) { pfkeystat.out_invmsgtype++; - return orglen; -#if 0 - if (targetp) - *targetp = KEY_SENDUP_REGISTERED; -#endif + error = EINVAL; + goto senderror; + } - case SADB_X_SPDADD: - case SADB_X_SPDSETIDX: - case SADB_X_SPDUPDATE: - if ((newmsg = key_spdadd(mhp)) == NULL) - return orglen; - if (targetp) - *targetp = KEY_SENDUP_ALL; - break; - - case SADB_X_SPDDELETE: - if ((newmsg = key_spddelete(mhp)) == NULL) - return orglen; - if (targetp) - *targetp = KEY_SENDUP_ALL; - break; - - case SADB_X_SPDDELETE2: - if ((newmsg = key_spddelete2(mhp)) == NULL) - return orglen; - if (targetp) - *targetp = KEY_SENDUP_ALL; - break; - - case SADB_X_SPDGET: - /* key_spdget will call key_sendup() on her own */ - error = key_spdget(mhp, so, KEY_SENDUP_ONE); - if (error) { - msg->sadb_msg_errno = error; - return orglen; - } else { - KFREE(msg); - return 0; - } - break; + return (*key_typesw[msg->sadb_msg_type])(so, m, &mh); - case SADB_X_SPDDUMP: - /* key_spddump will call key_sendup() on her own */ - error = key_spddump(mhp, so, KEY_SENDUP_ONE); - if (error) { - msg->sadb_msg_errno = error; - return orglen; - } else { - KFREE(msg); - return 0; - } - break; +senderror: + msg->sadb_msg_errno = error; + return key_sendup_mbuf(so, m, target); +} - case SADB_X_SPDFLUSH: - if ((newmsg = key_spdflush(mhp)) == NULL) - return orglen; - if (targetp) - *targetp = KEY_SENDUP_ALL; - break; +static int +key_senderror(so, m, code) + struct socket *so; + struct mbuf *m; + int code; +{ + struct sadb_msg *msg; - default: - msg->sadb_msg_errno = EOPNOTSUPP; - return orglen; - } + lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_OWNED); - /* switch from old sadb_msg to new one if success. */ - KFREE(msg); - *msgp = newmsg; + if (m->m_len < sizeof(struct sadb_msg)) + panic("invalid mbuf passed to key_senderror"); - return PFKEY_UNUNIT64((*msgp)->sadb_msg_len); + msg = mtod(m, struct sadb_msg *); + msg->sadb_msg_errno = code; + return key_sendup_mbuf(so, m, KEY_SENDUP_ONE); } /* * set the pointer to each header into message buffer. - * IN: msg: pointer to message buffer. - * mhp: pointer to the buffer allocated like below: - * caddr_t mhp[SADB_EXT_MAX + 1]; - * OUT: 0: - * EINVAL: + * m will be freed on error. + * XXX larger-than-MCLBYTES extension? */ static int -key_align(msg, mhp) - struct sadb_msg *msg; - caddr_t *mhp; +key_align(m, mhp) + struct mbuf *m; + struct sadb_msghdr *mhp; { + struct mbuf *n; struct sadb_ext *ext; - int tlen, extlen; - int i; + size_t off, end; + int extlen; + int toff; /* sanity check */ - if (msg == NULL || mhp == NULL) + if (m == NULL || mhp == NULL) panic("key_align: NULL pointer is passed.\n"); + if (m->m_len < sizeof(struct sadb_msg)) + panic("invalid mbuf passed to key_align"); /* initialize */ - for (i = 0; i < SADB_EXT_MAX + 1; i++) - mhp[i] = NULL; + bzero(mhp, sizeof(*mhp)); - mhp[0] = (caddr_t)msg; + mhp->msg = mtod(m, struct sadb_msg *); + mhp->ext[0] = (struct sadb_ext *)mhp->msg; /*XXX backward compat */ - tlen = PFKEY_UNUNIT64(msg->sadb_msg_len) - sizeof(struct sadb_msg); - ext = (struct sadb_ext *)((caddr_t)msg + sizeof(struct sadb_msg)); + end = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len); + extlen = end; /*just in case extlen is not updated*/ + for (off = sizeof(struct sadb_msg); off < end; off += extlen) { + n = m_pulldown(m, off, sizeof(struct sadb_ext), &toff); + if (!n) { + /* m is already freed */ + return ENOBUFS; + } + ext = (struct sadb_ext *)(mtod(n, caddr_t) + toff); - while (tlen > 0) { /* set pointer */ switch (ext->sadb_ext_type) { case SADB_EXT_SA: - case SADB_EXT_LIFETIME_CURRENT: - case SADB_EXT_LIFETIME_HARD: - case SADB_EXT_LIFETIME_SOFT: case SADB_EXT_ADDRESS_SRC: case SADB_EXT_ADDRESS_DST: case SADB_EXT_ADDRESS_PROXY: + case SADB_EXT_LIFETIME_CURRENT: + case SADB_EXT_LIFETIME_HARD: + case SADB_EXT_LIFETIME_SOFT: case SADB_EXT_KEY_AUTH: case SADB_EXT_KEY_ENCRYPT: case SADB_EXT_IDENTITY_SRC: @@ -6552,41 +7346,120 @@ key_align(msg, mhp) case SADB_EXT_SUPPORTED_ENCRYPT: case SADB_EXT_SPIRANGE: case SADB_X_EXT_POLICY: + case SADB_X_EXT_SA2: /* duplicate check */ /* * XXX Are there duplication payloads of either * KEY_AUTH or KEY_ENCRYPT ? */ - if (mhp[ext->sadb_ext_type] != NULL) { -#if IPSEC_DEBUG - printf("key_align: duplicate ext_type %u " - "is passed.\n", - ext->sadb_ext_type); -#endif + if (mhp->ext[ext->sadb_ext_type] != NULL) { + ipseclog((LOG_DEBUG, + "key_align: duplicate ext_type %u " + "is passed.\n", ext->sadb_ext_type)); + m_freem(m); pfkeystat.out_dupext++; return EINVAL; } - mhp[ext->sadb_ext_type] = (caddr_t)ext; break; default: -#if IPSEC_DEBUG - printf("key_align: invalid ext_type %u is passed.\n", - ext->sadb_ext_type); -#endif + ipseclog((LOG_DEBUG, + "key_align: invalid ext_type %u is passed.\n", + ext->sadb_ext_type)); + m_freem(m); pfkeystat.out_invexttype++; return EINVAL; } extlen = PFKEY_UNUNIT64(ext->sadb_ext_len); - tlen -= extlen; - ext = (struct sadb_ext *)((caddr_t)ext + extlen); + + if (key_validate_ext(ext, extlen)) { + m_freem(m); + pfkeystat.out_invlen++; + return EINVAL; + } + + n = m_pulldown(m, off, extlen, &toff); + if (!n) { + /* m is already freed */ + return ENOBUFS; + } + ext = (struct sadb_ext *)(mtod(n, caddr_t) + toff); + + mhp->ext[ext->sadb_ext_type] = ext; + mhp->extoff[ext->sadb_ext_type] = off; + mhp->extlen[ext->sadb_ext_type] = extlen; + } + + if (off != end) { + m_freem(m); + pfkeystat.out_invlen++; + return EINVAL; + } + + return 0; +} + +static int +key_validate_ext(ext, len) + const struct sadb_ext *ext; + int len; +{ + struct sockaddr *sa; + enum { NONE, ADDR } checktype = NONE; + int baselen; + const int sal = offsetof(struct sockaddr, sa_len) + sizeof(sa->sa_len); + + if (len != PFKEY_UNUNIT64(ext->sadb_ext_len)) + return EINVAL; + + /* if it does not match minimum/maximum length, bail */ + if (ext->sadb_ext_type >= sizeof(minsize) / sizeof(minsize[0]) || + ext->sadb_ext_type >= sizeof(maxsize) / sizeof(maxsize[0])) + return EINVAL; + if (!minsize[ext->sadb_ext_type] || len < minsize[ext->sadb_ext_type]) + return EINVAL; + if (maxsize[ext->sadb_ext_type] && len > maxsize[ext->sadb_ext_type]) + return EINVAL; + + /* more checks based on sadb_ext_type XXX need more */ + switch (ext->sadb_ext_type) { + case SADB_EXT_ADDRESS_SRC: + case SADB_EXT_ADDRESS_DST: + case SADB_EXT_ADDRESS_PROXY: + baselen = PFKEY_ALIGN8(sizeof(struct sadb_address)); + checktype = ADDR; + break; + case SADB_EXT_IDENTITY_SRC: + case SADB_EXT_IDENTITY_DST: + if (((struct sadb_ident *)ext)->sadb_ident_type == + SADB_X_IDENTTYPE_ADDR) { + baselen = PFKEY_ALIGN8(sizeof(struct sadb_ident)); + checktype = ADDR; + } else + checktype = NONE; + break; + default: + checktype = NONE; + break; + } + + switch (checktype) { + case NONE: + break; + case ADDR: + sa = (struct sockaddr *)((caddr_t)ext + baselen); + if (len < baselen + sal) + return EINVAL; + if (baselen + PFKEY_ALIGN8(sa->sa_len) != len) + return EINVAL; + break; } return 0; } void -key_init() +key_domain_init() { int i; @@ -6608,8 +7481,10 @@ key_init() LIST_INIT(&spacqtree); /* system default */ +#if INET ip4_def_policy.policy = IPSEC_POLICY_NONE; ip4_def_policy.refcnt++; /*never reclaim this*/ +#endif #if INET6 ip6_def_policy.policy = IPSEC_POLICY_NONE; ip6_def_policy.refcnt++; /*never reclaim this*/ @@ -6622,7 +7497,9 @@ key_init() /* initialize key statistics */ keystat.getspi_count = 1; +#ifndef __APPLE__ printf("IPsec: Initialized Security Association Processing.\n"); +#endif return; } @@ -6642,6 +7519,8 @@ key_checktunnelsanity(sav, family, src, dst) caddr_t src; caddr_t dst; { + lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_OWNED); + /* sanity check */ if (sav->sah == NULL) panic("sav->sah == NULL at key_checktunnelsanity"); @@ -6652,9 +7531,7 @@ key_checktunnelsanity(sav, family, src, dst) } #if 0 -#ifdef __FreeBSD__ #define hostnamelen strlen(hostname) -#endif /* * Get FQDN for the host. @@ -6723,6 +7600,8 @@ key_sa_recordxfer(sav, m) struct secasvar *sav; struct mbuf *m; { + lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_OWNED); + if (!sav) panic("key_sa_recordxfer called with sav == NULL"); if (!m) @@ -6774,14 +7653,16 @@ key_sa_routechange(dst) struct secashead *sah; struct route *ro; + lck_mtx_lock(sadb_mutex); LIST_FOREACH(sah, &sahtree, chain) { ro = &sah->sa_route; if (ro->ro_rt && dst->sa_len == ro->ro_dst.sa_len && bcmp(dst, &ro->ro_dst, dst->sa_len) == 0) { - RTFREE(ro->ro_rt); + rtfree(ro->ro_rt); ro->ro_rt = (struct rtentry *)NULL; } } + lck_mtx_unlock(sadb_mutex); return; } @@ -6791,6 +7672,8 @@ key_sa_chgstate(sav, state) struct secasvar *sav; u_int8_t state; { + lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_OWNED); + if (sav == NULL) panic("key_sa_chgstate called with sav == NULL"); @@ -6804,96 +7687,53 @@ key_sa_chgstate(sav, state) LIST_INSERT_HEAD(&sav->sah->savtree[state], sav, chain); } -/* returns NULL on error, m0 will be left unchanged */ -static caddr_t -key_appendmbuf(m0, len) - struct mbuf *m0; - int len; +void +key_sa_stir_iv(sav) + struct secasvar *sav; { - caddr_t p; - struct mbuf *m; - struct mbuf *n; - - if (!m0 || (m0->m_flags & M_PKTHDR) == 0) - return NULL; /*EINVAL*/ - if (len > MCLBYTES) - return NULL; /*EINVAL*/ - - for (m = m0; m && m->m_next; m = m->m_next) - ; - if (len <= M_TRAILINGSPACE(m)) { - p = mtod(m, caddr_t) + m->m_len; - m->m_len += len; - m0->m_pkthdr.len += len; - return p; - } - MGET(n, M_DONTWAIT, m->m_type); - if (n != NULL) { - MCLGET(n, M_DONTWAIT); - if ((n->m_flags & M_EXT) == 0) { - m_freem(n); - n = NULL; - } - } - if (n == NULL) - return NULL; /*ENOBUFS*/ - n->m_next = NULL; - m->m_next = n; - n->m_len = len; - m0->m_pkthdr.len += len; + lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_OWNED); - return mtod(n, caddr_t); + if (!sav->iv) + panic("key_sa_stir_iv called with sav == NULL"); + key_randomfill(sav->iv, sav->ivlen); } -#ifdef __bsdi__ -#include -#include - -int *key_sysvars[] = KEYCTL_VARS; - -int -key_sysctl(name, namelen, oldp, oldlenp, newp, newlen) - int *name; - u_int namelen; - void *oldp; - size_t *oldlenp; - void *newp; - size_t newlen; +/* XXX too much? */ +static struct mbuf * +key_alloc_mbuf(l) + int l; { - if (name[0] >= KEYCTL_MAXID) - return EOPNOTSUPP; - switch (name[0]) { - default: - return sysctl_int_arr(key_sysvars, name, namelen, - oldp, oldlenp, newp, newlen); - } -} -#endif /*__bsdi__*/ + struct mbuf *m = NULL, *n; + int len, t; + + len = l; + while (len > 0) { + MGET(n, M_DONTWAIT, MT_DATA); + if (n && len > MLEN) + MCLGET(n, M_DONTWAIT); + if (!n) { + m_freem(m); + return NULL; + } -#ifdef __NetBSD__ -#include -#include + n->m_next = NULL; + n->m_len = 0; + n->m_len = M_TRAILINGSPACE(n); + /* use the bottom of mbuf, hoping we can prepend afterwards */ + if (n->m_len > len) { + t = (n->m_len - len) & ~(sizeof(long) - 1); + n->m_data += t; + n->m_len = len; + } -static int *key_sysvars[] = KEYCTL_VARS; + len -= n->m_len; -int -key_sysctl(name, namelen, oldp, oldlenp, newp, newlen) - int *name; - u_int namelen; - void *oldp; - size_t *oldlenp; - void *newp; - size_t newlen; -{ - if (name[0] >= KEYCTL_MAXID) - return EOPNOTSUPP; - if (!key_sysvars[name[0]]) - return EOPNOTSUPP; - switch (name[0]) { - default: - return sysctl_int(oldp, oldlenp, newp, newlen, - key_sysvars[name[0]]); + if (m) + m_cat(m, n); + else + m = n; } + + return m; } -#endif /*__NetBSD__*/