X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/2d21ac55c334faf3a56e5634905ed6987fc787d4..39236c6e673c41db228275375ab7fdb0f837b292:/bsd/netinet6/in6.c diff --git a/bsd/netinet6/in6.c b/bsd/netinet6/in6.c index c5da17932..261fdc420 100644 --- a/bsd/netinet6/in6.c +++ b/bsd/netinet6/in6.c @@ -1,5 +1,5 @@ /* - * Copyright (c) 2003-2007 Apple Inc. All rights reserved. + * Copyright (c) 2003-2013 Apple Inc. All rights reserved. * * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ * @@ -26,9 +26,6 @@ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ */ -/* $FreeBSD: src/sys/netinet6/in6.c,v 1.7.2.7 2001/08/06 20:26:22 ume Exp $ */ -/* $KAME: in6.c,v 1.187 2001/05/24 07:43:59 itojun Exp $ */ - /* * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. * All rights reserved. @@ -106,7 +103,14 @@ #include #include #include +#include +#include + #include +#include +#include +#include +#include #include #include @@ -118,11 +122,13 @@ #include #include #include -#ifndef SCOPEDROUTING #include #include #include -#endif +#include +#include +#include +#include #include #include @@ -131,16 +137,16 @@ #include #include #include -#ifndef SCOPEDROUTING +#include #include -#endif #include -#ifndef __APPLE__ -MALLOC_DEFINE(M_IPMADDR, "in6_multi", "internet multicast address"); -#endif - /* +#if PF +#include +#endif /* PF */ + +/* * Definitions of some costant IP6 addresses. */ const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT; @@ -151,26 +157,113 @@ const struct in6_addr in6addr_linklocal_allnodes = IN6ADDR_LINKLOCAL_ALLNODES_INIT; const struct in6_addr in6addr_linklocal_allrouters = IN6ADDR_LINKLOCAL_ALLROUTERS_INIT; +const struct in6_addr in6addr_linklocal_allv2routers = + IN6ADDR_LINKLOCAL_ALLV2ROUTERS_INIT; const struct in6_addr in6mask0 = IN6MASK0; +const struct in6_addr in6mask7 = IN6MASK7; +const struct in6_addr in6mask16 = IN6MASK16; const struct in6_addr in6mask32 = IN6MASK32; const struct in6_addr in6mask64 = IN6MASK64; const struct in6_addr in6mask96 = IN6MASK96; const struct in6_addr in6mask128 = IN6MASK128; -const struct sockaddr_in6 sa6_any = {sizeof(sa6_any), AF_INET6, - 0, 0, IN6ADDR_ANY_INIT, 0}; +const struct sockaddr_in6 sa6_any = { + sizeof (sa6_any), AF_INET6, 0, 0, IN6ADDR_ANY_INIT, 0 +}; + +static int in6ctl_lifaddr(struct ifnet *, u_long, struct if_laddrreq *, + boolean_t); +static int in6ctl_associd(struct socket *, u_long, caddr_t); +static int in6ctl_connid(struct socket *, u_long, caddr_t); +static int in6ctl_conninfo(struct socket *, u_long, caddr_t); +static int in6ctl_llstart(struct ifnet *, u_long, caddr_t); +static int in6ctl_llstop(struct ifnet *); +static int in6ctl_cgastart(struct ifnet *, u_long, caddr_t); +static int in6ctl_gifaddr(struct ifnet *, struct in6_ifaddr *, u_long, + struct in6_ifreq *); +static int in6ctl_gifstat(struct ifnet *, u_long, struct in6_ifreq *); +static int in6ctl_alifetime(struct in6_ifaddr *, u_long, struct in6_ifreq *, + boolean_t); +static int in6ctl_aifaddr(struct ifnet *, struct in6_aliasreq *); +static void in6ctl_difaddr(struct ifnet *, struct in6_ifaddr *); +static int in6_autoconf(struct ifnet *, int); +static int in6_setrouter(struct ifnet *, int); +static int in6_ifinit(struct ifnet *, struct in6_ifaddr *, int); +static int in6_ifaupdate_aux(struct in6_ifaddr *, struct ifnet *, int); +static void in6_unlink_ifa(struct in6_ifaddr *, struct ifnet *); +static struct in6_ifaddr *in6_ifaddr_alloc(int); +static void in6_ifaddr_attached(struct ifaddr *); +static void in6_ifaddr_detached(struct ifaddr *); +static void in6_ifaddr_free(struct ifaddr *); +static void in6_ifaddr_trace(struct ifaddr *, int); +#if defined(__LP64__) +static void in6_llstartreq_32_to_64(struct in6_llstartreq_32 *, + struct in6_llstartreq_64 *); +#else +static void in6_llstartreq_64_to_32(struct in6_llstartreq_64 *, + struct in6_llstartreq_32 *); +#endif +static struct in6_aliasreq *in6_aliasreq_to_native(void *, int, + struct in6_aliasreq *); +static struct in6_llstartreq *in6_llstartreq_to_native(void *, int, + struct in6_llstartreq *); +static int in6_to_kamescope(struct sockaddr_in6 *, struct ifnet *); + +static void in6_ifaddr_set_dadprogress(struct in6_ifaddr *); -static int in6_lifaddr_ioctl(struct socket *, u_long, caddr_t, - struct ifnet *, struct proc *); -static int in6_ifinit(struct ifnet *, struct in6_ifaddr *, - struct sockaddr_in6 *, int); -static void in6_unlink_ifa(struct in6_ifaddr *, struct ifnet *, int); +static int in6_getassocids(struct socket *, uint32_t *, user_addr_t); +static int in6_getconnids(struct socket *, associd_t, uint32_t *, user_addr_t); +static int in6_getconninfo(struct socket *, connid_t, uint32_t *, + uint32_t *, int32_t *, user_addr_t, socklen_t *, user_addr_t, socklen_t *, + uint32_t *, user_addr_t, uint32_t *); + +static void in6_if_up_dad_start(struct ifnet *); -struct in6_multihead in6_multihead; /* XXX BSS initialization */ extern lck_mtx_t *nd6_mutex; extern int in6_init2done; +#define IN6IFA_TRACE_HIST_SIZE 32 /* size of trace history */ + +/* For gdb */ +__private_extern__ unsigned int in6ifa_trace_hist_size = IN6IFA_TRACE_HIST_SIZE; + +struct in6_ifaddr_dbg { + struct in6_ifaddr in6ifa; /* in6_ifaddr */ + struct in6_ifaddr in6ifa_old; /* saved in6_ifaddr */ + u_int16_t in6ifa_refhold_cnt; /* # of IFA_ADDREF */ + u_int16_t in6ifa_refrele_cnt; /* # of IFA_REMREF */ + /* + * Alloc and free callers. + */ + ctrace_t in6ifa_alloc; + ctrace_t in6ifa_free; + /* + * Circular lists of IFA_ADDREF and IFA_REMREF callers. + */ + ctrace_t in6ifa_refhold[IN6IFA_TRACE_HIST_SIZE]; + ctrace_t in6ifa_refrele[IN6IFA_TRACE_HIST_SIZE]; + /* + * Trash list linkage + */ + TAILQ_ENTRY(in6_ifaddr_dbg) in6ifa_trash_link; +}; + +/* List of trash in6_ifaddr entries protected by in6ifa_trash_lock */ +static TAILQ_HEAD(, in6_ifaddr_dbg) in6ifa_trash_head; +static decl_lck_mtx_data(, in6ifa_trash_lock); + +#if DEBUG +static unsigned int in6ifa_debug = 1; /* debugging (enabled) */ +#else +static unsigned int in6ifa_debug; /* debugging (disabled) */ +#endif /* !DEBUG */ +static unsigned int in6ifa_size; /* size of zone element */ +static struct zone *in6ifa_zone; /* zone for in6_ifaddr */ + +#define IN6IFA_ZONE_MAX 64 /* maximum elements in zone */ +#define IN6IFA_ZONE_NAME "in6_ifaddr" /* zone name */ + /* * Subroutine for in6_ifaddloop() and in6_ifremloop(). * This routine does actual work. @@ -181,10 +274,10 @@ in6_ifloop_request(int cmd, struct ifaddr *ifa) struct sockaddr_in6 all1_sa; struct rtentry *nrt = NULL; int e; - - bzero(&all1_sa, sizeof(all1_sa)); + + bzero(&all1_sa, sizeof (all1_sa)); all1_sa.sin6_family = AF_INET6; - all1_sa.sin6_len = sizeof(struct sockaddr_in6); + all1_sa.sin6_len = sizeof (struct sockaddr_in6); all1_sa.sin6_addr = in6mask128; /* @@ -194,10 +287,11 @@ in6_ifloop_request(int cmd, struct ifaddr *ifa) * would be happy. Note that we assume the caller of the function * (probably implicitly) set nd6_rtrequest() to ifa->ifa_rtrequest, * which changes the outgoing interface to the loopback interface. + * ifa_addr for INET6 is set once during init; no need to hold lock. */ + lck_mtx_lock(rnh_lock); e = rtrequest_locked(cmd, ifa->ifa_addr, ifa->ifa_addr, - (struct sockaddr *)&all1_sa, - RTF_UP|RTF_HOST|RTF_LLINFO, &nrt); + (struct sockaddr *)&all1_sa, RTF_UP|RTF_HOST|RTF_LLINFO, &nrt); if (e != 0) { log(LOG_ERR, "in6_ifloop_request: " "%s operation failed for %s (errno=%d)\n", @@ -206,6 +300,8 @@ in6_ifloop_request(int cmd, struct ifaddr *ifa) e); } + if (nrt != NULL) + RT_LOCK(nrt); /* * Make sure rt_ifa be equal to IFA, the second argument of the * function. @@ -220,18 +316,21 @@ in6_ifloop_request(int cmd, struct ifaddr *ifa) /* * Report the addition/removal of the address to the routing socket. * XXX: since we called rtinit for a p2p interface with a destination, - * we end up reporting twice in such a case. Should we rather - * omit the second report? + * we end up reporting twice in such a case. Should we rather + * omit the second report? */ - if (nrt) { + if (nrt != NULL) { rt_newaddrmsg(cmd, ifa, e, nrt); if (cmd == RTM_DELETE) { + RT_UNLOCK(nrt); rtfree_locked(nrt); } else { /* the cmd must be RTM_ADD here */ - rtunref(nrt); + RT_REMREF_LOCKED(nrt); + RT_UNLOCK(nrt); } } + lck_mtx_unlock(rnh_lock); } /* @@ -246,15 +345,24 @@ in6_ifaddloop(struct ifaddr *ifa) { struct rtentry *rt; - lck_mtx_lock(rt_mtx); - /* If there is no loopback entry, allocate one. */ - rt = rtalloc1_locked(ifa->ifa_addr, 0, 0UL); + /* + * If there is no loopback entry, allocate one. ifa_addr for + * INET6 is set once during init; no need to hold lock. + */ + rt = rtalloc1(ifa->ifa_addr, 0, 0); + if (rt != NULL) + RT_LOCK(rt); if (rt == NULL || (rt->rt_flags & RTF_HOST) == 0 || - (rt->rt_ifp->if_flags & IFF_LOOPBACK) == 0) + (rt->rt_ifp->if_flags & IFF_LOOPBACK) == 0) { + if (rt != NULL) { + RT_REMREF_LOCKED(rt); + RT_UNLOCK(rt); + } in6_ifloop_request(RTM_ADD, ifa); - if (rt) - rtunref(rt); - lck_mtx_unlock(rt_mtx); + } else if (rt != NULL) { + RT_REMREF_LOCKED(rt); + RT_UNLOCK(rt); + } } /* @@ -262,7 +370,7 @@ in6_ifaddloop(struct ifaddr *ifa) * if it exists. */ static void -in6_ifremloop(struct ifaddr *ifa, int locked) +in6_ifremloop(struct ifaddr *ifa) { struct in6_ifaddr *ia; struct rtentry *rt; @@ -284,68 +392,45 @@ in6_ifremloop(struct ifaddr *ifa, int locked) * (probably p2p) interfaces. * XXX: we should avoid such a configuration in IPv6... */ - if (!locked) - lck_mtx_lock(nd6_mutex); + lck_rw_lock_exclusive(&in6_ifaddr_rwlock); for (ia = in6_ifaddrs; ia; ia = ia->ia_next) { + IFA_LOCK(&ia->ia_ifa); if (IN6_ARE_ADDR_EQUAL(IFA_IN6(ifa), &ia->ia_addr.sin6_addr)) { ia_count++; - if (ia_count > 1) + if (ia_count > 1) { + IFA_UNLOCK(&ia->ia_ifa); break; + } } + IFA_UNLOCK(&ia->ia_ifa); } - if (!locked) - lck_mtx_unlock(nd6_mutex); + lck_rw_done(&in6_ifaddr_rwlock); if (ia_count == 1) { /* * Before deleting, check if a corresponding loopbacked host * route surely exists. With this check, we can avoid to * delete an interface direct route whose destination is same - * as the address being removed. This can happen when remofing + * as the address being removed. This can happen when removing * a subnet-router anycast address on an interface attahced - * to a shared medium. + * to a shared medium. ifa_addr for INET6 is set once during + * init; no need to hold lock. */ - lck_mtx_lock(rt_mtx); - rt = rtalloc1_locked(ifa->ifa_addr, 0, 0UL); - if (rt != NULL && (rt->rt_flags & RTF_HOST) != 0 && - (rt->rt_ifp->if_flags & IFF_LOOPBACK) != 0) { - rtunref(rt); - in6_ifloop_request(RTM_DELETE, ifa); + rt = rtalloc1(ifa->ifa_addr, 0, 0); + if (rt != NULL) { + RT_LOCK(rt); + if ((rt->rt_flags & RTF_HOST) != 0 && + (rt->rt_ifp->if_flags & IFF_LOOPBACK) != 0) { + RT_REMREF_LOCKED(rt); + RT_UNLOCK(rt); + in6_ifloop_request(RTM_DELETE, ifa); + } else { + RT_UNLOCK(rt); + } } - lck_mtx_unlock(rt_mtx); } } -int -in6_ifindex2scopeid(idx) - int idx; -{ - struct ifnet *ifp; - struct ifaddr *ifa; - struct sockaddr_in6 *sin6; - - if (idx < 0 || if_index < idx) - return -1; - - ifnet_head_lock_shared(); - ifp = ifindex2ifnet[idx]; - ifnet_head_done(); - - ifnet_lock_shared(ifp); - TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) - { - if (ifa->ifa_addr->sa_family != AF_INET6) - continue; - sin6 = (struct sockaddr_in6 *)ifa->ifa_addr; - if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) { - ifnet_lock_done(ifp); - return sin6->sin6_scope_id & 0xffff; - } - } - ifnet_lock_done(ifp); - - return -1; -} int in6_mask2len(mask, lim0) @@ -355,9 +440,9 @@ in6_mask2len(mask, lim0) int x = 0, y; u_char *lim = lim0, *p; - if (lim0 == NULL || - lim0 - (u_char *)mask > sizeof(*mask)) /* ignore the scope_id part */ - lim = (u_char *)mask + sizeof(*mask); + /* ignore the scope_id part */ + if (lim0 == NULL || lim0 - (u_char *)mask > sizeof (*mask)) + lim = (u_char *)mask + sizeof (*mask); for (p = (u_char *)mask; p < lim; x++, p++) { if (*p != 0xff) break; @@ -376,13 +461,13 @@ in6_mask2len(mask, lim0) */ if (p < lim) { if (y != 0 && (*p & (0x00ff >> y)) != 0) - return(-1); + return (-1); for (p = p + 1; p < lim; p++) if (*p != 0) - return(-1); + return (-1); } - - return x * 8 + y; + + return (x * 8 + y); } void @@ -392,1014 +477,1867 @@ in6_len2mask(mask, len) { int i; - bzero(mask, sizeof(*mask)); + bzero(mask, sizeof (*mask)); for (i = 0; i < len / 8; i++) mask->s6_addr8[i] = 0xff; if (len % 8) mask->s6_addr8[i] = (0xff00 >> (len % 8)) & 0xff; } -#define ifa2ia6(ifa) ((struct in6_ifaddr *)(ifa)) -#define ia62ifa(ia6) (&((ia6)->ia_ifa)) +void +in6_aliasreq_64_to_32(struct in6_aliasreq_64 *src, struct in6_aliasreq_32 *dst) +{ + bzero(dst, sizeof (*dst)); + bcopy(src->ifra_name, dst->ifra_name, sizeof (dst->ifra_name)); + dst->ifra_addr = src->ifra_addr; + dst->ifra_dstaddr = src->ifra_dstaddr; + dst->ifra_prefixmask = src->ifra_prefixmask; + dst->ifra_flags = src->ifra_flags; + dst->ifra_lifetime.ia6t_expire = src->ifra_lifetime.ia6t_expire; + dst->ifra_lifetime.ia6t_preferred = src->ifra_lifetime.ia6t_preferred; + dst->ifra_lifetime.ia6t_vltime = src->ifra_lifetime.ia6t_vltime; + dst->ifra_lifetime.ia6t_pltime = src->ifra_lifetime.ia6t_pltime; +} -int -in6_control(so, cmd, data, ifp, p) - struct socket *so; - u_long cmd; - caddr_t data; - struct ifnet *ifp; - struct proc *p; +void +in6_aliasreq_32_to_64(struct in6_aliasreq_32 *src, struct in6_aliasreq_64 *dst) { - struct in6_ifreq *ifr = (struct in6_ifreq *)data; - struct in6_ifaddr *ia = NULL; - struct in6_aliasreq *ifra = (struct in6_aliasreq *)data; - int privileged, error = 0; - int index; - struct timeval timenow; + bzero(dst, sizeof (*dst)); + bcopy(src->ifra_name, dst->ifra_name, sizeof (dst->ifra_name)); + dst->ifra_addr = src->ifra_addr; + dst->ifra_dstaddr = src->ifra_dstaddr; + dst->ifra_prefixmask = src->ifra_prefixmask; + dst->ifra_flags = src->ifra_flags; + dst->ifra_lifetime.ia6t_expire = src->ifra_lifetime.ia6t_expire; + dst->ifra_lifetime.ia6t_preferred = src->ifra_lifetime.ia6t_preferred; + dst->ifra_lifetime.ia6t_vltime = src->ifra_lifetime.ia6t_vltime; + dst->ifra_lifetime.ia6t_pltime = src->ifra_lifetime.ia6t_pltime; +} - getmicrotime(&timenow); +#if defined(__LP64__) +void +in6_llstartreq_32_to_64(struct in6_llstartreq_32 *src, + struct in6_llstartreq_64 *dst) +{ + bzero(dst, sizeof (*dst)); + bcopy(src->llsr_name, dst->llsr_name, sizeof (dst->llsr_name)); + dst->llsr_flags = src->llsr_flags; + bcopy(src->llsr_cgaprep.cga_modifier.octets, + dst->llsr_cgaprep.cga_modifier.octets, + sizeof (dst->llsr_cgaprep.cga_modifier.octets)); + dst->llsr_cgaprep.cga_security_level = + src->llsr_cgaprep.cga_security_level; + dst->llsr_lifetime.ia6t_expire = src->llsr_lifetime.ia6t_expire; + dst->llsr_lifetime.ia6t_preferred = src->llsr_lifetime.ia6t_preferred; + dst->llsr_lifetime.ia6t_vltime = src->llsr_lifetime.ia6t_vltime; + dst->llsr_lifetime.ia6t_pltime = src->llsr_lifetime.ia6t_pltime; +} +#endif - privileged = 0; -#ifdef __APPLE__ - if (p == NULL || !proc_suser(p)) -#else - if (p == NULL || !suser(p)) +#if !defined(__LP64__) +void +in6_llstartreq_64_to_32(struct in6_llstartreq_64 *src, + struct in6_llstartreq_32 *dst) +{ + bzero(dst, sizeof (*dst)); + bcopy(src->llsr_name, dst->llsr_name, sizeof (dst->llsr_name)); + dst->llsr_flags = src->llsr_flags; + bcopy(src->llsr_cgaprep.cga_modifier.octets, + dst->llsr_cgaprep.cga_modifier.octets, + sizeof (dst->llsr_cgaprep.cga_modifier.octets)); + dst->llsr_cgaprep.cga_security_level = + src->llsr_cgaprep.cga_security_level; + dst->llsr_lifetime.ia6t_expire = src->llsr_lifetime.ia6t_expire; + dst->llsr_lifetime.ia6t_preferred = src->llsr_lifetime.ia6t_preferred; + dst->llsr_lifetime.ia6t_vltime = src->llsr_lifetime.ia6t_vltime; + dst->llsr_lifetime.ia6t_pltime = src->llsr_lifetime.ia6t_pltime; +} #endif - privileged++; - switch (cmd) { - case SIOCGETSGCNT_IN6: - case SIOCGETMIFCNT_IN6: - return (mrt6_ioctl(cmd, data)); - } +static struct in6_aliasreq * +in6_aliasreq_to_native(void *data, int data_is_64, struct in6_aliasreq *dst) +{ +#if defined(__LP64__) + if (data_is_64) + bcopy(data, dst, sizeof (*dst)); + else + in6_aliasreq_32_to_64((struct in6_aliasreq_32 *)data, + (struct in6_aliasreq_64 *)dst); +#else + if (data_is_64) + in6_aliasreq_64_to_32((struct in6_aliasreq_64 *)data, + (struct in6_aliasreq_32 *)dst); + else + bcopy(data, dst, sizeof (*dst)); +#endif /* __LP64__ */ + return (dst); +} - if (ifp == NULL) - return(EOPNOTSUPP); +static struct in6_llstartreq * +in6_llstartreq_to_native(void *data, int is64, struct in6_llstartreq *dst) +{ +#if defined(__LP64__) + if (is64) + bcopy(data, dst, sizeof (*dst)); + else + in6_llstartreq_32_to_64((struct in6_llstartreq_32 *)data, + (struct in6_llstartreq_64 *)dst); +#else + if (is64) + in6_llstartreq_64_to_32((struct in6_llstartreq_64 *)data, + (struct in6_llstartreq_32 *)dst); + else + bcopy(data, dst, sizeof (*dst)); +#endif /* __LP64__ */ + return (dst); +} - switch (cmd) { - case SIOCAUTOCONF_START: - case SIOCAUTOCONF_STOP: - case SIOCLL_START: - case SIOCLL_STOP: - case SIOCPROTOATTACH_IN6: - case SIOCPROTODETACH_IN6: - if (!privileged) - return(EPERM); - break; - case SIOCSNDFLUSH_IN6: - case SIOCSPFXFLUSH_IN6: - case SIOCSRTRFLUSH_IN6: - case SIOCSDEFIFACE_IN6: - case SIOCSIFINFO_FLAGS: - if (!privileged) - return(EPERM); - /* fall through */ - case OSIOCGIFINFO_IN6: - case SIOCGIFINFO_IN6: - case SIOCGDRLST_IN6: - case SIOCGPRLST_IN6: - case SIOCGNBRINFO_IN6: - case SIOCGDEFIFACE_IN6: - return(nd6_ioctl(cmd, data, ifp)); - } +static __attribute__((noinline)) int +in6ctl_associd(struct socket *so, u_long cmd, caddr_t data) +{ + int error = 0; + union { + struct so_aidreq32 a32; + struct so_aidreq64 a64; + } u; - switch (cmd) { - case SIOCSIFPREFIX_IN6: - case SIOCDIFPREFIX_IN6: - case SIOCAIFPREFIX_IN6: - case SIOCCIFPREFIX_IN6: - case SIOCSGIFPREFIX_IN6: - case SIOCGIFPREFIX_IN6: - log(LOG_NOTICE, - "prefix ioctls are now invalidated. " - "please use ifconfig.\n"); - return(EOPNOTSUPP); - } + VERIFY(so != NULL); switch (cmd) { - case SIOCSSCOPE6: - if (!privileged) - return(EPERM); - return(scope6_set(ifp, ifr->ifr_ifru.ifru_scope_id)); - break; - case SIOCGSCOPE6: - return(scope6_get(ifp, ifr->ifr_ifru.ifru_scope_id)); + case SIOCGASSOCIDS32: { /* struct so_aidreq32 */ + bcopy(data, &u.a32, sizeof (u.a32)); + error = in6_getassocids(so, &u.a32.sar_cnt, u.a32.sar_aidp); + if (error == 0) + bcopy(&u.a32, data, sizeof (u.a32)); break; - case SIOCGSCOPE6DEF: - return(scope6_get_default(ifr->ifr_ifru.ifru_scope_id)); + } + + case SIOCGASSOCIDS64: { /* struct so_aidreq64 */ + bcopy(data, &u.a64, sizeof (u.a64)); + error = in6_getassocids(so, &u.a64.sar_cnt, u.a64.sar_aidp); + if (error == 0) + bcopy(&u.a64, data, sizeof (u.a64)); break; } - switch (cmd) { - case SIOCALIFADDR: - case SIOCDLIFADDR: - if (!privileged) - return(EPERM); - /* fall through */ - case SIOCGLIFADDR: - return in6_lifaddr_ioctl(so, cmd, data, ifp, p); + default: + VERIFY(0); + /* NOTREACHED */ } - -#ifdef __APPLE__ + + return (error); +} + +static __attribute__((noinline)) int +in6ctl_connid(struct socket *so, u_long cmd, caddr_t data) +{ + int error = 0; + union { + struct so_cidreq32 c32; + struct so_cidreq64 c64; + } u; + + VERIFY(so != NULL); switch (cmd) { + case SIOCGCONNIDS32: { /* struct so_cidreq32 */ + bcopy(data, &u.c32, sizeof (u.c32)); + error = in6_getconnids(so, u.c32.scr_aid, &u.c32.scr_cnt, + u.c32.scr_cidp); + if (error == 0) + bcopy(&u.c32, data, sizeof (u.c32)); + break; + } - case SIOCAUTOCONF_START: - ifnet_lock_exclusive(ifp); - ifp->if_eflags |= IFEF_ACCEPT_RTADVD; - ifnet_lock_done(ifp); - return (0); + case SIOCGCONNIDS64: { /* struct so_cidreq64 */ + bcopy(data, &u.c64, sizeof (u.c64)); + error = in6_getconnids(so, u.c64.scr_aid, &u.c64.scr_cnt, + u.c64.scr_cidp); + if (error == 0) + bcopy(&u.c64, data, sizeof (u.c64)); + break; + } - case SIOCAUTOCONF_STOP: - { - struct in6_ifaddr *nia = NULL; - - ifnet_lock_exclusive(ifp); - ifp->if_eflags &= ~IFEF_ACCEPT_RTADVD; - ifnet_lock_done(ifp); - - /* nuke prefix list. this may try to remove some ifaddrs as well */ - in6_purgeprefix(ifp); - - /* removed autoconfigured address from interface */ - lck_mtx_lock(nd6_mutex); - for (ia = in6_ifaddrs; ia != NULL; ia = nia) { - nia = ia->ia_next; - if (ia->ia_ifa.ifa_ifp != ifp) - continue; - if (ia->ia6_flags & IN6_IFF_AUTOCONF) - in6_purgeaddr(&ia->ia_ifa, 1); - } - lck_mtx_unlock(nd6_mutex); - return (0); - } + default: + VERIFY(0); + /* NOTREACHED */ + } + return (error); +} - case SIOCLL_START: - - /* NOTE: All the interface specific DLIL attachements should be done here - * They are currently done in in6_ifattach() for the interfaces that need it - */ +static __attribute__((noinline)) int +in6ctl_conninfo(struct socket *so, u_long cmd, caddr_t data) +{ + int error = 0; + union { + struct so_cinforeq32 ci32; + struct so_cinforeq64 ci64; + } u; - if (ifp->if_type == IFT_PPP && ifra->ifra_addr.sin6_family == AF_INET6 && - ifra->ifra_dstaddr.sin6_family == AF_INET6) - in6_if_up(ifp, ifra); /* PPP may provide LinkLocal addresses */ - else - in6_if_up(ifp, 0); + VERIFY(so != NULL); - return(0); + switch (cmd) { + case SIOCGCONNINFO32: { /* struct so_cinforeq32 */ + bcopy(data, &u.ci32, sizeof (u.ci32)); + error = in6_getconninfo(so, u.ci32.scir_cid, &u.ci32.scir_flags, + &u.ci32.scir_ifindex, &u.ci32.scir_error, u.ci32.scir_src, + &u.ci32.scir_src_len, u.ci32.scir_dst, &u.ci32.scir_dst_len, + &u.ci32.scir_aux_type, u.ci32.scir_aux_data, + &u.ci32.scir_aux_len); + if (error == 0) + bcopy(&u.ci32, data, sizeof (u.ci32)); + break; + } - case SIOCLL_STOP: - { - struct in6_ifaddr *nia = NULL; - - /* removed link local addresses from interface */ + case SIOCGCONNINFO64: { /* struct so_cinforeq64 */ + bcopy(data, &u.ci64, sizeof (u.ci64)); + error = in6_getconninfo(so, u.ci64.scir_cid, &u.ci64.scir_flags, + &u.ci64.scir_ifindex, &u.ci64.scir_error, u.ci64.scir_src, + &u.ci64.scir_src_len, u.ci64.scir_dst, &u.ci64.scir_dst_len, + &u.ci64.scir_aux_type, u.ci64.scir_aux_data, + &u.ci64.scir_aux_len); + if (error == 0) + bcopy(&u.ci64, data, sizeof (u.ci64)); + break; + } - lck_mtx_lock(nd6_mutex); - for (ia = in6_ifaddrs; ia != NULL; ia = nia) { - nia = ia->ia_next; - if (ia->ia_ifa.ifa_ifp != ifp) - continue; - if (IN6_IS_ADDR_LINKLOCAL(&ia->ia_addr.sin6_addr)) - in6_purgeaddr(&ia->ia_ifa, 1); - } - lck_mtx_unlock(nd6_mutex); - return (0); - } + default: + VERIFY(0); + /* NOTREACHED */ + } + return (error); +} - case SIOCPROTOATTACH_IN6: +static __attribute__((noinline)) int +in6ctl_llstart(struct ifnet *ifp, u_long cmd, caddr_t data) +{ + struct in6_aliasreq sifra, *ifra = NULL; + boolean_t is64; + int error = 0; - switch (ifp->if_type) { -#if IFT_BRIDGE /*OpenBSD 2.8*/ - /* some of the interfaces are inherently not IPv6 capable */ - case IFT_BRIDGE: - return; -#endif - default: + VERIFY(ifp != NULL); - if ((error = proto_plumb(PF_INET6, ifp))) - printf("SIOCPROTOATTACH_IN6: %s error=%d\n", - if_name(ifp), error); - break; + switch (cmd) { + case SIOCLL_START_32: /* struct in6_aliasreq_32 */ + case SIOCLL_START_64: /* struct in6_aliasreq_64 */ + is64 = (cmd == SIOCLL_START_64); + /* + * Convert user ifra to the kernel form, when appropriate. + * This allows the conversion between different data models + * to be centralized, so that it can be passed around to other + * routines that are expecting the kernel form. + */ + ifra = in6_aliasreq_to_native(data, is64, &sifra); + /* + * NOTE: All the interface specific DLIL attachements should + * be done here. They are currently done in in6_ifattach_aux() + * for the interfaces that need it. + */ + if ((ifp->if_eflags & IFEF_NOAUTOIPV6LL) != 0 && + ifra->ifra_addr.sin6_family == AF_INET6 && + /* Only check ifra_dstaddr if valid */ + (ifra->ifra_dstaddr.sin6_len == 0 || + ifra->ifra_dstaddr.sin6_family == AF_INET6)) { + /* some interfaces may provide LinkLocal addresses */ + error = in6_ifattach_aliasreq(ifp, NULL, ifra); + } else { + error = in6_ifattach_aliasreq(ifp, NULL, NULL); } - return (error); + if (error == 0) + in6_if_up_dad_start(ifp); + break; - - case SIOCPROTODETACH_IN6: + default: + VERIFY(0); + /* NOTREACHED */ + } - in6_purgeif(ifp); /* Cleanup interface routes and addresses */ + return (error); +} - if ((error = proto_unplumb(PF_INET6, ifp))) - printf("SIOCPROTODETACH_IN6: %s error=%d\n", - if_name(ifp), error); - return(error); +static __attribute__((noinline)) int +in6ctl_llstop(struct ifnet *ifp) +{ + struct in6_ifaddr *ia; - } -#endif - /* - * Find address for this interface, if it exists. - */ - if (ifra->ifra_addr.sin6_family == AF_INET6) { /* XXX */ - struct sockaddr_in6 *sa6 = - (struct sockaddr_in6 *)&ifra->ifra_addr; + VERIFY(ifp != NULL); - if (IN6_IS_ADDR_LINKLOCAL(&sa6->sin6_addr)) { - if (sa6->sin6_addr.s6_addr16[1] == 0) { - /* link ID is not embedded by the user */ - sa6->sin6_addr.s6_addr16[1] = - htons(ifp->if_index); - } else if (sa6->sin6_addr.s6_addr16[1] != - htons(ifp->if_index)) { - return(EINVAL); /* link ID contradicts */ - } - if (sa6->sin6_scope_id) { - if (sa6->sin6_scope_id != - (u_int32_t)ifp->if_index) - return(EINVAL); - sa6->sin6_scope_id = 0; /* XXX: good way? */ - } + /* Remove link local addresses from interface */ + lck_rw_lock_exclusive(&in6_ifaddr_rwlock); + ia = in6_ifaddrs; + while (ia != NULL) { + if (ia->ia_ifa.ifa_ifp != ifp) { + ia = ia->ia_next; + continue; + } + IFA_LOCK(&ia->ia_ifa); + if (IN6_IS_ADDR_LINKLOCAL(&ia->ia_addr.sin6_addr)) { + IFA_ADDREF_LOCKED(&ia->ia_ifa); /* for us */ + IFA_UNLOCK(&ia->ia_ifa); + lck_rw_done(&in6_ifaddr_rwlock); + in6_purgeaddr(&ia->ia_ifa); + IFA_REMREF(&ia->ia_ifa); /* for us */ + lck_rw_lock_exclusive(&in6_ifaddr_rwlock); + /* + * Purging the address caused in6_ifaddr_rwlock + * to be dropped and reacquired; + * therefore search again from the beginning + * of in6_ifaddrs list. + */ + ia = in6_ifaddrs; + continue; } - ia = in6ifa_ifpwithaddr(ifp, &ifra->ifra_addr.sin6_addr); + IFA_UNLOCK(&ia->ia_ifa); + ia = ia->ia_next; } + lck_rw_done(&in6_ifaddr_rwlock); + return (0); +} + +static __attribute__((noinline)) int +in6ctl_cgastart(struct ifnet *ifp, u_long cmd, caddr_t data) +{ + struct in6_llstartreq llsr; + int is64, error = 0; + + VERIFY(ifp != NULL); switch (cmd) { - case SIOCSIFADDR_IN6: - case SIOCSIFDSTADDR_IN6: - case SIOCSIFNETMASK_IN6: + case SIOCLL_CGASTART_32: /* struct in6_llstartreq_32 */ + case SIOCLL_CGASTART_64: /* struct in6_llstartreq_64 */ + is64 = (cmd == SIOCLL_CGASTART_64); /* - * Since IPv6 allows a node to assign multiple addresses - * on a single interface, SIOCSIFxxx ioctls are not suitable - * and should be unused. + * Convert user llstartreq to the kernel form, when appropriate. + * This allows the conversion between different data models + * to be centralized, so that it can be passed around to other + * routines that are expecting the kernel form. */ - /* we decided to obsolete this command (20000704) */ - error = EINVAL; - goto ioctl_cleanup; + in6_llstartreq_to_native(data, is64, &llsr); - case SIOCDIFADDR_IN6: /* - * for IPv4, we look for existing in_ifaddr here to allow - * "ifconfig if0 delete" to remove first IPv4 address on the - * interface. For IPv6, as the spec allow multiple interface - * address from the day one, we consider "remove the first one" - * semantics to be not preferable. + * NOTE: All the interface specific DLIL attachements + * should be done here. They are currently done in + * in6_ifattach_llstartreq() for the interfaces that + * need it. */ - if (ia == NULL) { - error = EADDRNOTAVAIL; - goto ioctl_cleanup; - } - - /* FALLTHROUGH */ - case SIOCAIFADDR_IN6: - /* - * We always require users to specify a valid IPv6 address for - * the corresponding operation. - */ - if (ifra->ifra_addr.sin6_family != AF_INET6 || - ifra->ifra_addr.sin6_len != sizeof(struct sockaddr_in6)) { - error = EAFNOSUPPORT; - goto ioctl_cleanup; - } - if (!privileged) { - error = EPERM; - goto ioctl_cleanup; - } - - break; - - case SIOCGIFADDR_IN6: - /* This interface is basically deprecated. use SIOCGIFCONF. */ - /* fall through */ - case SIOCGIFAFLAG_IN6: - case SIOCGIFNETMASK_IN6: - case SIOCGIFDSTADDR_IN6: - case SIOCGIFALIFETIME_IN6: - /* must think again about its semantics */ - if (ia == NULL) { - error = EADDRNOTAVAIL; - goto ioctl_cleanup; - } + error = in6_ifattach_llstartreq(ifp, &llsr); + if (error == 0) + in6_if_up_dad_start(ifp); break; - case SIOCSIFALIFETIME_IN6: - { - struct in6_addrlifetime *lt; - if (!privileged) { - error = EPERM; - goto ioctl_cleanup; - } - if (ia == NULL) { - error = EADDRNOTAVAIL; - goto ioctl_cleanup; - } - /* sanity for overflow - beware unsigned */ - lt = &ifr->ifr_ifru.ifru_lifetime; - if (lt->ia6t_vltime != ND6_INFINITE_LIFETIME - && lt->ia6t_vltime + timenow.tv_sec < timenow.tv_sec) { - error = EINVAL; - goto ioctl_cleanup; - } - if (lt->ia6t_pltime != ND6_INFINITE_LIFETIME - && lt->ia6t_pltime + timenow.tv_sec < timenow.tv_sec) { - error = EINVAL; - goto ioctl_cleanup; - } - break; - } + default: + VERIFY(0); + /* NOTREACHED */ } - switch (cmd) { + return (error); +} + +/* + * Caller passes in the ioctl data pointer directly via "ifr", with the + * expectation that this routine always uses bcopy() or other byte-aligned + * memory accesses. + */ +static __attribute__((noinline)) int +in6ctl_gifaddr(struct ifnet *ifp, struct in6_ifaddr *ia, u_long cmd, + struct in6_ifreq *ifr) +{ + struct sockaddr_in6 addr; + int error = 0; + + VERIFY(ifp != NULL); - case SIOCGIFADDR_IN6: - ifr->ifr_addr = ia->ia_addr; + if (ia == NULL) + return (EADDRNOTAVAIL); + + switch (cmd) { + case SIOCGIFADDR_IN6: /* struct in6_ifreq */ + IFA_LOCK(&ia->ia_ifa); + bcopy(&ia->ia_addr, &addr, sizeof (addr)); + IFA_UNLOCK(&ia->ia_ifa); + if ((error = sa6_recoverscope(&addr, TRUE)) != 0) + break; + bcopy(&addr, &ifr->ifr_addr, sizeof (addr)); break; - case SIOCGIFDSTADDR_IN6: - if ((ifp->if_flags & IFF_POINTOPOINT) == 0) { + case SIOCGIFDSTADDR_IN6: /* struct in6_ifreq */ + if (!(ifp->if_flags & IFF_POINTOPOINT)) { error = EINVAL; - goto ioctl_cleanup; + break; } /* * XXX: should we check if ifa_dstaddr is NULL and return * an error? */ - ifr->ifr_dstaddr = ia->ia_dstaddr; + IFA_LOCK(&ia->ia_ifa); + bcopy(&ia->ia_dstaddr, &addr, sizeof (addr)); + IFA_UNLOCK(&ia->ia_ifa); + if ((error = sa6_recoverscope(&addr, TRUE)) != 0) + break; + bcopy(&addr, &ifr->ifr_dstaddr, sizeof (addr)); break; - case SIOCGIFNETMASK_IN6: - ifr->ifr_addr = ia->ia_prefixmask; - break; + default: + VERIFY(0); + /* NOTREACHED */ + } - case SIOCGIFAFLAG_IN6: - ifr->ifr_ifru.ifru_flags6 = ia->ia6_flags; - break; + return (error); +} - case SIOCGIFSTAT_IN6: - if (ifp == NULL) { - error = EINVAL; - goto ioctl_cleanup; - } - index = ifp->if_index; - if (in6_ifstat == NULL || index >= in6_ifstatmax - || in6_ifstat[index] == NULL) { - /* return EAFNOSUPPORT? */ +/* + * Caller passes in the ioctl data pointer directly via "ifr", with the + * expectation that this routine always uses bcopy() or other byte-aligned + * memory accesses. + */ +static __attribute__((noinline)) int +in6ctl_gifstat(struct ifnet *ifp, u_long cmd, struct in6_ifreq *ifr) +{ + int error = 0, index; + + VERIFY(ifp != NULL); + index = ifp->if_index; + + switch (cmd) { + case SIOCGIFSTAT_IN6: /* struct in6_ifreq */ + /* N.B.: if_inet6data is never freed once set. */ + if (IN6_IFEXTRA(ifp) == NULL) { + /* return (EAFNOSUPPORT)? */ bzero(&ifr->ifr_ifru.ifru_stat, - sizeof(ifr->ifr_ifru.ifru_stat)); - } else - ifr->ifr_ifru.ifru_stat = *in6_ifstat[index]; + sizeof (ifr->ifr_ifru.ifru_stat)); + } else { + bcopy(&IN6_IFEXTRA(ifp)->in6_ifstat, + &ifr->ifr_ifru.ifru_stat, + sizeof (ifr->ifr_ifru.ifru_stat)); + } break; - case SIOCGIFSTAT_ICMP6: - if (ifp == NULL) { - error = EINVAL; - goto ioctl_cleanup; - } - index = ifp->if_index; - if (icmp6_ifstat == NULL || index >= icmp6_ifstatmax || - icmp6_ifstat[index] == NULL) { - /* return EAFNOSUPPORT? */ + case SIOCGIFSTAT_ICMP6: /* struct in6_ifreq */ + /* N.B.: if_inet6data is never freed once set. */ + if (IN6_IFEXTRA(ifp) == NULL) { + /* return (EAFNOSUPPORT)? */ bzero(&ifr->ifr_ifru.ifru_stat, - sizeof(ifr->ifr_ifru.ifru_icmp6stat)); - } else - ifr->ifr_ifru.ifru_icmp6stat = - *icmp6_ifstat[index]; + sizeof (ifr->ifr_ifru.ifru_icmp6stat)); + } else { + bcopy(&IN6_IFEXTRA(ifp)->icmp6_ifstat, + &ifr->ifr_ifru.ifru_icmp6stat, + sizeof (ifr->ifr_ifru.ifru_icmp6stat)); + } break; - case SIOCGIFALIFETIME_IN6: - ifr->ifr_ifru.ifru_lifetime = ia->ia6_lifetime; - break; + default: + VERIFY(0); + /* NOTREACHED */ + } - case SIOCSIFALIFETIME_IN6: - ia->ia6_lifetime = ifr->ifr_ifru.ifru_lifetime; - /* for sanity */ - if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) { - ia->ia6_lifetime.ia6t_expire = - timenow.tv_sec + ia->ia6_lifetime.ia6t_vltime; - } else - ia->ia6_lifetime.ia6t_expire = 0; - if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) { - ia->ia6_lifetime.ia6t_preferred = - timenow.tv_sec + ia->ia6_lifetime.ia6t_pltime; - } else - ia->ia6_lifetime.ia6t_preferred = 0; - break; + return (error); +} - case SIOCAIFADDR_IN6: - { - int i; - struct nd_prefix pr0, *pr; - - /* Attempt to attache the protocol, in case it isn't attached */ - error = proto_plumb(PF_INET6, ifp); - if (error) { - if (error != EEXIST) { - printf("SIOCAIFADDR_IN6: %s can't plumb protocol error=%d\n", - if_name(ifp), error); - goto ioctl_cleanup; - } - - /* Ignore, EEXIST */ - error = 0; - } - else { - /* PF_INET6 wasn't previously attached */ - in6_if_up(ifp, NULL); +/* + * Caller passes in the ioctl data pointer directly via "ifr", with the + * expectation that this routine always uses bcopy() or other byte-aligned + * memory accesses. + */ +static __attribute__((noinline)) int +in6ctl_alifetime(struct in6_ifaddr *ia, u_long cmd, struct in6_ifreq *ifr, + boolean_t p64) +{ + uint64_t timenow = net_uptime(); + struct in6_addrlifetime ia6_lt; + struct timeval caltime; + int error = 0; + + if (ia == NULL) + return (EADDRNOTAVAIL); + + switch (cmd) { + case SIOCGIFALIFETIME_IN6: /* struct in6_ifreq */ + IFA_LOCK(&ia->ia_ifa); + /* retrieve time as calendar time (last arg is 1) */ + in6ifa_getlifetime(ia, &ia6_lt, 1); + if (p64) { + struct in6_addrlifetime_64 lt; + + bzero(<, sizeof (lt)); + lt.ia6t_expire = ia6_lt.ia6t_expire; + lt.ia6t_preferred = ia6_lt.ia6t_preferred; + lt.ia6t_vltime = ia6_lt.ia6t_vltime; + lt.ia6t_pltime = ia6_lt.ia6t_pltime; + bcopy(<, &ifr->ifr_ifru.ifru_lifetime, sizeof (lt)); + } else { + struct in6_addrlifetime_32 lt; + + bzero(<, sizeof (lt)); + lt.ia6t_expire = (uint32_t)ia6_lt.ia6t_expire; + lt.ia6t_preferred = (uint32_t)ia6_lt.ia6t_preferred; + lt.ia6t_vltime = (uint32_t)ia6_lt.ia6t_vltime; + lt.ia6t_pltime = (uint32_t)ia6_lt.ia6t_pltime; + bcopy(<, &ifr->ifr_ifru.ifru_lifetime, sizeof (lt)); } + IFA_UNLOCK(&ia->ia_ifa); + break; - /* - * first, make or update the interface address structure, - * and link it to the list. - */ - if ((error = in6_update_ifa(ifp, ifra, ia)) != 0) - goto ioctl_cleanup; + case SIOCSIFALIFETIME_IN6: /* struct in6_ifreq */ + getmicrotime(&caltime); - /* - * then, make the prefix on-link on the interface. - * XXX: we'd rather create the prefix before the address, but - * we need at least one address to install the corresponding - * interface route, so we configure the address first. - */ + /* sanity for overflow - beware unsigned */ + if (p64) { + struct in6_addrlifetime_64 lt; - /* - * convert mask to prefix length (prefixmask has already - * been validated in in6_update_ifa(). - */ - bzero(&pr0, sizeof(pr0)); - pr0.ndpr_ifp = ifp; - pr0.ndpr_plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr, - NULL); - if (pr0.ndpr_plen == 128) - break; /* we don't need to install a host route. */ - pr0.ndpr_prefix = ifra->ifra_addr; - pr0.ndpr_mask = ifra->ifra_prefixmask.sin6_addr; - /* apply the mask for safety. */ - for (i = 0; i < 4; i++) { - pr0.ndpr_prefix.sin6_addr.s6_addr32[i] &= - ifra->ifra_prefixmask.sin6_addr.s6_addr32[i]; - } - /* - * XXX: since we don't have an API to set prefix (not address) - * lifetimes, we just use the same lifetimes as addresses. - * The (temporarily) installed lifetimes can be overridden by - * later advertised RAs (when accept_rtadv is non 0), which is - * an intended behavior. - */ - pr0.ndpr_raf_onlink = 1; /* should be configurable? */ - pr0.ndpr_raf_auto = - ((ifra->ifra_flags & IN6_IFF_AUTOCONF) != 0); - pr0.ndpr_vltime = ifra->ifra_lifetime.ia6t_vltime; - pr0.ndpr_pltime = ifra->ifra_lifetime.ia6t_pltime; - - /* add the prefix if there's one. */ - if ((pr = nd6_prefix_lookup(&pr0)) == NULL) { - /* - * nd6_prelist_add will install the corresponding - * interface route. - */ - if ((error = nd6_prelist_add(&pr0, NULL, &pr)) != 0) - goto ioctl_cleanup; - if (pr == NULL) { - log(LOG_ERR, "nd6_prelist_add succedded but " - "no prefix\n"); + bcopy(&ifr->ifr_ifru.ifru_lifetime, <, sizeof (lt)); + if (lt.ia6t_vltime != ND6_INFINITE_LIFETIME && + lt.ia6t_vltime + caltime.tv_sec < caltime.tv_sec) { error = EINVAL; - goto ioctl_cleanup; + break; + } + if (lt.ia6t_pltime != ND6_INFINITE_LIFETIME && + lt.ia6t_pltime + caltime.tv_sec < caltime.tv_sec) { + error = EINVAL; + break; } - } - if ((ia = in6ifa_ifpwithaddr(ifp, &ifra->ifra_addr.sin6_addr)) - == NULL) { - /* XXX: this should not happen! */ - log(LOG_ERR, "in6_control: addition succeeded, but" - " no ifaddr\n"); } else { - if ((ia->ia6_flags & IN6_IFF_AUTOCONF) != 0 && - ia->ia6_ndpr == NULL) { /* new autoconfed addr */ - lck_mtx_lock(nd6_mutex); - pr->ndpr_refcnt++; - lck_mtx_unlock(nd6_mutex); - ia->ia6_ndpr = pr; + struct in6_addrlifetime_32 lt; - /* - * If this is the first autoconf address from - * the prefix, create a temporary address - * as well (when specified). - */ - if (ip6_use_tempaddr && - pr->ndpr_refcnt == 1) { - int e; - if ((e = in6_tmpifadd(ia, 1)) != 0) { - log(LOG_NOTICE, "in6_control: " - "failed to create a " - "temporary address, " - "errno=%d\n", - e); - } - } + bcopy(&ifr->ifr_ifru.ifru_lifetime, <, sizeof (lt)); + if (lt.ia6t_vltime != ND6_INFINITE_LIFETIME && + lt.ia6t_vltime + caltime.tv_sec < caltime.tv_sec) { + error = EINVAL; + break; + } + if (lt.ia6t_pltime != ND6_INFINITE_LIFETIME && + lt.ia6t_pltime + caltime.tv_sec < caltime.tv_sec) { + error = EINVAL; + break; } + } - /* - * this might affect the status of autoconfigured - * addresses, that is, this address might make - * other addresses detached. - */ - pfxlist_onlink_check(0); + IFA_LOCK(&ia->ia_ifa); + if (p64) { + struct in6_addrlifetime_64 lt; + + bcopy(&ifr->ifr_ifru.ifru_lifetime, <, sizeof (lt)); + ia6_lt.ia6t_expire = lt.ia6t_expire; + ia6_lt.ia6t_preferred = lt.ia6t_preferred; + ia6_lt.ia6t_vltime = lt.ia6t_vltime; + ia6_lt.ia6t_pltime = lt.ia6t_pltime; + } else { + struct in6_addrlifetime_32 lt; + + bcopy(&ifr->ifr_ifru.ifru_lifetime, <, sizeof (lt)); + ia6_lt.ia6t_expire = (uint32_t)lt.ia6t_expire; + ia6_lt.ia6t_preferred = (uint32_t)lt.ia6t_preferred; + ia6_lt.ia6t_vltime = lt.ia6t_vltime; + ia6_lt.ia6t_pltime = lt.ia6t_pltime; } + /* for sanity */ + if (ia6_lt.ia6t_vltime != ND6_INFINITE_LIFETIME) + ia6_lt.ia6t_expire = timenow + ia6_lt.ia6t_vltime; + else + ia6_lt.ia6t_expire = 0; - /* Drop use count held above during lookup/add */ - ndpr_rele(pr, FALSE); + if (ia6_lt.ia6t_pltime != ND6_INFINITE_LIFETIME) + ia6_lt.ia6t_preferred = timenow + ia6_lt.ia6t_pltime; + else + ia6_lt.ia6t_preferred = 0; + in6ifa_setlifetime(ia, &ia6_lt); + IFA_UNLOCK(&ia->ia_ifa); break; + + default: + VERIFY(0); + /* NOTREACHED */ } - case SIOCDIFADDR_IN6: - { - int i = 0; - struct nd_prefix pr0, *pr; + return (error); +} + +#define ifa2ia6(ifa) ((struct in6_ifaddr *)(void *)(ifa)) + +/* + * Generic INET6 control operations (ioctl's). + * + * ifp is NULL if not an interface-specific ioctl. + * + * Most of the routines called to handle the ioctls would end up being + * tail-call optimized, which unfortunately causes this routine to + * consume too much stack space; this is the reason for the "noinline" + * attribute used on those routines. + * + * If called directly from within the networking stack (as opposed to via + * pru_control), the socket parameter may be NULL. + */ +int +in6_control(struct socket *so, u_long cmd, caddr_t data, struct ifnet *ifp, + struct proc *p) +{ + struct in6_ifreq *ifr = (struct in6_ifreq *)(void *)data; + struct in6_aliasreq sifra, *ifra = NULL; + struct in6_ifaddr *ia = NULL; + struct sockaddr_in6 sin6, *sa6 = NULL; + boolean_t privileged = (proc_suser(p) == 0); + boolean_t p64 = proc_is64bit(p); + boolean_t so_unlocked = FALSE; + int intval, error = 0; + + /* In case it's NULL, make sure it came from the kernel */ + VERIFY(so != NULL || p == kernproc); + + /* + * ioctls which don't require ifp, may require socket. + */ + switch (cmd) { +#if MROUTING + case SIOCGETSGCNT_IN6: /* struct sioc_sg_req6 */ + case SIOCGETMIFCNT_IN6_32: /* struct sioc_mif_req6_32 */ + case SIOCGETMIFCNT_IN6_64: /* struct sioc_mif_req6_64 */ + return (mrt6_ioctl(cmd, data)); + /* NOTREACHED */ +#endif /* MROUTING */ + + case SIOCAADDRCTL_POLICY: /* struct in6_addrpolicy */ + case SIOCDADDRCTL_POLICY: /* struct in6_addrpolicy */ + if (!privileged) + return (EPERM); + return (in6_src_ioctl(cmd, data)); + /* NOTREACHED */ + + case SIOCDRADD_IN6_32: /* struct in6_defrouter_32 */ + case SIOCDRADD_IN6_64: /* struct in6_defrouter_64 */ + case SIOCDRDEL_IN6_32: /* struct in6_defrouter_32 */ + case SIOCDRDEL_IN6_64: /* struct in6_defrouter_64 */ + if (!privileged) + return (EPERM); + return (defrtrlist_ioctl(cmd, data)); + /* NOTREACHED */ + + case SIOCGASSOCIDS32: /* struct so_aidreq32 */ + case SIOCGASSOCIDS64: /* struct so_aidreq64 */ + return (in6ctl_associd(so, cmd, data)); + /* NOTREACHED */ + + case SIOCGCONNIDS32: /* struct so_cidreq32 */ + case SIOCGCONNIDS64: /* struct so_cidreq64 */ + return (in6ctl_connid(so, cmd, data)); + /* NOTREACHED */ + + case SIOCGCONNINFO32: /* struct so_cinforeq32 */ + case SIOCGCONNINFO64: /* struct so_cinforeq64 */ + return (in6ctl_conninfo(so, cmd, data)); + /* NOTREACHED */ + } + + /* + * The rest of ioctls require ifp; reject if we don't have one; + * return ENXIO to be consistent with ifioctl(). + */ + if (ifp == NULL) + return (ENXIO); + + /* + * ioctls which require ifp but not interface address. + */ + switch (cmd) { + case SIOCAUTOCONF_START: /* struct in6_ifreq */ + if (!privileged) + return (EPERM); + return (in6_autoconf(ifp, TRUE)); + /* NOTREACHED */ + + case SIOCAUTOCONF_STOP: /* struct in6_ifreq */ + if (!privileged) + return (EPERM); + return (in6_autoconf(ifp, FALSE)); + /* NOTREACHED */ + + case SIOCLL_START_32: /* struct in6_aliasreq_32 */ + case SIOCLL_START_64: /* struct in6_aliasreq_64 */ + if (!privileged) + return (EPERM); + return (in6ctl_llstart(ifp, cmd, data)); + /* NOTREACHED */ + + case SIOCLL_STOP: /* struct in6_ifreq */ + if (!privileged) + return (EPERM); + return (in6ctl_llstop(ifp)); + /* NOTREACHED */ + + case SIOCSETROUTERMODE_IN6: /* struct in6_ifreq */ + if (!privileged) + return (EPERM); + + bcopy(&((struct in6_ifreq *)(void *)data)->ifr_intval, + &intval, sizeof (intval)); + return (in6_setrouter(ifp, intval)); + /* NOTREACHED */ + + case SIOCPROTOATTACH_IN6_32: /* struct in6_aliasreq_32 */ + case SIOCPROTOATTACH_IN6_64: /* struct in6_aliasreq_64 */ + if (!privileged) + return (EPERM); + return (in6_domifattach(ifp)); + /* NOTREACHED */ + + case SIOCPROTODETACH_IN6: /* struct in6_ifreq */ + if (!privileged) + return (EPERM); + + /* Cleanup interface routes and addresses */ + in6_purgeif(ifp); + + if ((error = proto_unplumb(PF_INET6, ifp))) + log(LOG_ERR, "SIOCPROTODETACH_IN6: %s error=%d\n", + if_name(ifp), error); + return (error); + /* NOTREACHED */ + + case SIOCSNDFLUSH_IN6: /* struct in6_ifreq */ + case SIOCSPFXFLUSH_IN6: /* struct in6_ifreq */ + case SIOCSRTRFLUSH_IN6: /* struct in6_ifreq */ + case SIOCSDEFIFACE_IN6_32: /* struct in6_ndifreq_32 */ + case SIOCSDEFIFACE_IN6_64: /* struct in6_ndifreq_64 */ + case SIOCSIFINFO_FLAGS: /* struct in6_ndireq */ + if (!privileged) + return (EPERM); + /* FALLTHRU */ + case OSIOCGIFINFO_IN6: /* struct in6_ondireq */ + case SIOCGIFINFO_IN6: /* struct in6_ondireq */ + case SIOCGDRLST_IN6_32: /* struct in6_drlist_32 */ + case SIOCGDRLST_IN6_64: /* struct in6_drlist_64 */ + case SIOCGPRLST_IN6_32: /* struct in6_prlist_32 */ + case SIOCGPRLST_IN6_64: /* struct in6_prlist_64 */ + case SIOCGNBRINFO_IN6_32: /* struct in6_nbrinfo_32 */ + case SIOCGNBRINFO_IN6_64: /* struct in6_nbrinfo_64 */ + case SIOCGDEFIFACE_IN6_32: /* struct in6_ndifreq_32 */ + case SIOCGDEFIFACE_IN6_64: /* struct in6_ndifreq_64 */ + return (nd6_ioctl(cmd, data, ifp)); + /* NOTREACHED */ + + case SIOCSIFPREFIX_IN6: /* struct in6_prefixreq (deprecated) */ + case SIOCDIFPREFIX_IN6: /* struct in6_prefixreq (deprecated) */ + case SIOCAIFPREFIX_IN6: /* struct in6_rrenumreq (deprecated) */ + case SIOCCIFPREFIX_IN6: /* struct in6_rrenumreq (deprecated) */ + case SIOCSGIFPREFIX_IN6: /* struct in6_rrenumreq (deprecated) */ + case SIOCGIFPREFIX_IN6: /* struct in6_prefixreq (deprecated) */ + log(LOG_NOTICE, + "prefix ioctls are now invalidated. " + "please use ifconfig.\n"); + return (EOPNOTSUPP); + /* NOTREACHED */ + + case SIOCSSCOPE6: /* struct in6_ifreq (deprecated) */ + case SIOCGSCOPE6: /* struct in6_ifreq (deprecated) */ + case SIOCGSCOPE6DEF: /* struct in6_ifreq (deprecated) */ + return (EOPNOTSUPP); + /* NOTREACHED */ + + case SIOCALIFADDR: /* struct if_laddrreq */ + case SIOCDLIFADDR: /* struct if_laddrreq */ + if (!privileged) + return (EPERM); + /* FALLTHRU */ + case SIOCGLIFADDR: { /* struct if_laddrreq */ + struct if_laddrreq iflr; + + bcopy(data, &iflr, sizeof (iflr)); + error = in6ctl_lifaddr(ifp, cmd, &iflr, p64); + bcopy(&iflr, data, sizeof (iflr)); + return (error); + /* NOTREACHED */ + } + + case SIOCLL_CGASTART_32: /* struct in6_llstartreq_32 */ + case SIOCLL_CGASTART_64: /* struct in6_llstartreq_64 */ + if (!privileged) + return (EPERM); + return (in6ctl_cgastart(ifp, cmd, data)); + /* NOTREACHED */ + + case SIOCGIFSTAT_IN6: /* struct in6_ifreq */ + case SIOCGIFSTAT_ICMP6: /* struct in6_ifreq */ + return (in6ctl_gifstat(ifp, cmd, ifr)); + /* NOTREACHED */ + } + + /* + * ioctls which require interface address; obtain sockaddr_in6. + */ + switch (cmd) { + case SIOCSIFADDR_IN6: /* struct in6_ifreq (deprecated) */ + case SIOCSIFDSTADDR_IN6: /* struct in6_ifreq (deprecated) */ + case SIOCSIFNETMASK_IN6: /* struct in6_ifreq (deprecated) */ /* - * If the address being deleted is the only one that owns - * the corresponding prefix, expire the prefix as well. - * XXX: theoretically, we don't have to warry about such - * relationship, since we separate the address management - * and the prefix management. We do this, however, to provide - * as much backward compatibility as possible in terms of - * the ioctl operation. + * Since IPv6 allows a node to assign multiple addresses + * on a single interface, SIOCSIFxxx ioctls are deprecated. */ - bzero(&pr0, sizeof(pr0)); - pr0.ndpr_ifp = ifp; - pr0.ndpr_plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, - NULL); - if (pr0.ndpr_plen == 128) - goto purgeaddr; - pr0.ndpr_prefix = ia->ia_addr; - pr0.ndpr_mask = ia->ia_prefixmask.sin6_addr; - for (i = 0; i < 4; i++) { - pr0.ndpr_prefix.sin6_addr.s6_addr32[i] &= - ia->ia_prefixmask.sin6_addr.s6_addr32[i]; + /* we decided to obsolete this command (20000704) */ + return (EOPNOTSUPP); + /* NOTREACHED */ + + case SIOCAIFADDR_IN6_32: /* struct in6_aliasreq_32 */ + case SIOCAIFADDR_IN6_64: /* struct in6_aliasreq_64 */ + if (!privileged) + return (EPERM); + /* + * Convert user ifra to the kernel form, when appropriate. + * This allows the conversion between different data models + * to be centralized, so that it can be passed around to other + * routines that are expecting the kernel form. + */ + ifra = in6_aliasreq_to_native(data, + (cmd == SIOCAIFADDR_IN6_64), &sifra); + bcopy(&ifra->ifra_addr, &sin6, sizeof (sin6)); + sa6 = &sin6; + break; + + case SIOCDIFADDR_IN6: /* struct in6_ifreq */ + case SIOCSIFALIFETIME_IN6: /* struct in6_ifreq */ + if (!privileged) + return (EPERM); + /* FALLTHRU */ + case SIOCGIFADDR_IN6: /* struct in6_ifreq */ + case SIOCGIFDSTADDR_IN6: /* struct in6_ifreq */ + case SIOCGIFNETMASK_IN6: /* struct in6_ifreq */ + case SIOCGIFAFLAG_IN6: /* struct in6_ifreq */ + case SIOCGIFALIFETIME_IN6: /* struct in6_ifreq */ + bcopy(&ifr->ifr_addr, &sin6, sizeof (sin6)); + sa6 = &sin6; + break; + } + + /* + * Find address for this interface, if it exists. + * + * In netinet code, we have checked ifra_addr in SIOCSIF*ADDR operation + * only, and used the first interface address as the target of other + * operations (without checking ifra_addr). This was because netinet + * code/API assumed at most 1 interface address per interface. + * Since IPv6 allows a node to assign multiple addresses + * on a single interface, we almost always look and check the + * presence of ifra_addr, and reject invalid ones here. + * It also decreases duplicated code among SIOC*_IN6 operations. + */ + VERIFY(ia == NULL); + if (sa6 != NULL && sa6->sin6_family == AF_INET6) { + if (IN6_IS_ADDR_LINKLOCAL(&sa6->sin6_addr)) { + if (sa6->sin6_addr.s6_addr16[1] == 0) { + /* link ID is not embedded by the user */ + sa6->sin6_addr.s6_addr16[1] = + htons(ifp->if_index); + } else if (sa6->sin6_addr.s6_addr16[1] != + htons(ifp->if_index)) { + return (EINVAL); /* link ID contradicts */ + } + if (sa6->sin6_scope_id) { + if (sa6->sin6_scope_id != + (u_int32_t)ifp->if_index) + return (EINVAL); + sa6->sin6_scope_id = 0; /* XXX: good way? */ + } } /* - * The logic of the following condition is a bit complicated. - * We expire the prefix when - * 1. the address obeys autoconfiguration and it is the - * only owner of the associated prefix, or - * 2. the address does not obey autoconf and there is no - * other owner of the prefix. + * Any failures from this point on must take into account + * a non-NULL "ia" with an outstanding reference count, and + * therefore requires IFA_REMREF. Jump to "done" label + * instead of calling return if "ia" is valid. */ - if ((pr = nd6_prefix_lookup(&pr0)) != NULL && - (((ia->ia6_flags & IN6_IFF_AUTOCONF) != 0 && - pr->ndpr_refcnt == 1) || - ((ia->ia6_flags & IN6_IFF_AUTOCONF) == 0 && - pr->ndpr_refcnt == 0))) { - pr->ndpr_expire = 1; /* XXX: just for expiration */ + ia = in6ifa_ifpwithaddr(ifp, &sa6->sin6_addr); + } + + /* + * SIOCDIFADDR_IN6/SIOCAIFADDR_IN6 specific tests. + */ + switch (cmd) { + case SIOCDIFADDR_IN6: /* struct in6_ifreq */ + if (ia == NULL) + return (EADDRNOTAVAIL); + /* FALLTHROUGH */ + case SIOCAIFADDR_IN6_32: /* struct in6_aliasreq_32 */ + case SIOCAIFADDR_IN6_64: /* struct in6_aliasreq_64 */ + VERIFY(sa6 != NULL); + /* + * We always require users to specify a valid IPv6 address for + * the corresponding operation. Use "sa6" instead of "ifra" + * since SIOCDIFADDR_IN6 falls thru above. + */ + if (sa6->sin6_family != AF_INET6 || + sa6->sin6_len != sizeof (struct sockaddr_in6)) { + error = EAFNOSUPPORT; + goto done; + } + break; + } + + /* + * Unlock the socket since ifnet_ioctl() may be invoked by + * one of the ioctl handlers below. Socket will be re-locked + * prior to returning. + */ + if (so != NULL) { + socket_unlock(so, 0); + so_unlocked = TRUE; + } + + /* + * And finally process address-related ioctls. + */ + switch (cmd) { + case SIOCGIFADDR_IN6: /* struct in6_ifreq */ + /* This interface is basically deprecated. use SIOCGIFCONF. */ + /* FALLTHRU */ + case SIOCGIFDSTADDR_IN6: /* struct in6_ifreq */ + error = in6ctl_gifaddr(ifp, ia, cmd, ifr); + break; + + case SIOCGIFNETMASK_IN6: /* struct in6_ifreq */ + if (ia != NULL) { + IFA_LOCK(&ia->ia_ifa); + bcopy(&ia->ia_prefixmask, &ifr->ifr_addr, + sizeof (struct sockaddr_in6)); + IFA_UNLOCK(&ia->ia_ifa); + } else { + error = EADDRNOTAVAIL; } + break; - /* Drop use count held above during lookup */ - if (pr != NULL) - ndpr_rele(pr, FALSE); + case SIOCGIFAFLAG_IN6: /* struct in6_ifreq */ + if (ia != NULL) { + IFA_LOCK(&ia->ia_ifa); + bcopy(&ia->ia6_flags, &ifr->ifr_ifru.ifru_flags6, + sizeof (ifr->ifr_ifru.ifru_flags6)); + IFA_UNLOCK(&ia->ia_ifa); + } else { + error = EADDRNOTAVAIL; + } + break; - purgeaddr: - in6_purgeaddr(&ia->ia_ifa, 0); + case SIOCGIFALIFETIME_IN6: /* struct in6_ifreq */ + case SIOCSIFALIFETIME_IN6: /* struct in6_ifreq */ + error = in6ctl_alifetime(ia, cmd, ifr, p64); + break; + + case SIOCAIFADDR_IN6_32: /* struct in6_aliasreq_32 */ + case SIOCAIFADDR_IN6_64: /* struct in6_aliasreq_64 */ + error = in6ctl_aifaddr(ifp, ifra); + break; + + case SIOCDIFADDR_IN6: + in6ctl_difaddr(ifp, ia); break; - } default: error = ifnet_ioctl(ifp, PF_INET6, cmd, data); - goto ioctl_cleanup; + break; } -ioctl_cleanup: - return error; + +done: + if (ia != NULL) + IFA_REMREF(&ia->ia_ifa); + if (so_unlocked) + socket_lock(so, 0); + + return (error); } -/* - * Update parameters of an IPv6 interface address. - * If necessary, a new entry is created and linked into address chains. - * This function is separated from in6_control(). - * XXX: should this be performed under splnet()? - */ -int -in6_update_ifa(ifp, ifra, ia) - struct ifnet *ifp; - struct in6_aliasreq *ifra; - struct in6_ifaddr *ia; +static __attribute__((noinline)) int +in6ctl_aifaddr(struct ifnet *ifp, struct in6_aliasreq *ifra) { - int error = 0, hostIsNew = 0, plen = -1; - struct in6_ifaddr *oia; - struct sockaddr_in6 dst6; - struct in6_addrlifetime *lt; - struct timeval timenow; + int i, error, addtmp, plen; + struct nd_prefix pr0, *pr; + struct in6_ifaddr *ia; + VERIFY(ifp != NULL && ifra != NULL); + ia = NULL; - lck_mtx_assert(nd6_mutex, LCK_MTX_ASSERT_NOTOWNED); - /* Validate parameters */ - if (ifp == NULL || ifra == NULL) /* this maybe redundant */ - return(EINVAL); + /* Attempt to attach the protocol, in case it isn't attached */ + error = in6_domifattach(ifp); + if (error == 0) { + /* PF_INET6 wasn't previously attached */ + error = in6_ifattach_aliasreq(ifp, NULL, NULL); + if (error != 0) + goto done; + + in6_if_up_dad_start(ifp); + } else if (error != EEXIST) { + goto done; + } /* - * The destination address for a p2p link must have a family - * of AF_UNSPEC or AF_INET6. + * First, make or update the interface address structure, and link it + * to the list. */ - if ((ifp->if_flags & IFF_POINTOPOINT) != 0 && - ifra->ifra_dstaddr.sin6_family != AF_INET6 && - ifra->ifra_dstaddr.sin6_family != AF_UNSPEC) - return(EAFNOSUPPORT); + error = in6_update_ifa(ifp, ifra, 0, &ia); + if (error != 0) + goto done; + VERIFY(ia != NULL); + + /* Now, make the prefix on-link on the interface. */ + plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr, NULL); + if (plen == 128) + goto done; + /* - * validate ifra_prefixmask. don't check sin6_family, netmask - * does not carry fields other than sin6_len. + * NOTE: We'd rather create the prefix before the address, but we need + * at least one address to install the corresponding interface route, + * so we configure the address first. */ - if (ifra->ifra_prefixmask.sin6_len > sizeof(struct sockaddr_in6)) - return(EINVAL); + /* - * Set the address family value for the mask if it was not set. - * Radar 3899482. + * Convert mask to prefix length (prefixmask has already been validated + * in in6_update_ifa(). */ - if (ifra->ifra_prefixmask.sin6_len == sizeof(struct sockaddr_in6) && - ifra->ifra_prefixmask.sin6_family == 0) { - ifra->ifra_prefixmask.sin6_family = AF_INET6; + bzero(&pr0, sizeof (pr0)); + pr0.ndpr_plen = plen; + pr0.ndpr_ifp = ifp; + pr0.ndpr_prefix = ifra->ifra_addr; + pr0.ndpr_mask = ifra->ifra_prefixmask.sin6_addr; + + /* apply the mask for safety. */ + for (i = 0; i < 4; i++) { + pr0.ndpr_prefix.sin6_addr.s6_addr32[i] &= + ifra->ifra_prefixmask.sin6_addr.s6_addr32[i]; } + /* - * Because the IPv6 address architecture is classless, we require - * users to specify a (non 0) prefix length (mask) for a new address. - * We also require the prefix (when specified) mask is valid, and thus - * reject a non-consecutive mask. + * Since we don't have an API to set prefix (not address) lifetimes, we + * just use the same lifetimes as addresses. The (temporarily) + * installed lifetimes can be overridden by later advertised RAs (when + * accept_rtadv is non 0), which is an intended behavior. */ - if (ia == NULL && ifra->ifra_prefixmask.sin6_len == 0) - return(EINVAL); - if (ifra->ifra_prefixmask.sin6_len != 0) { - plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr, - (u_char *)&ifra->ifra_prefixmask + - ifra->ifra_prefixmask.sin6_len); - if (plen <= 0) - return(EINVAL); + pr0.ndpr_raf_onlink = 1; /* should be configurable? */ + pr0.ndpr_raf_auto = !!(ifra->ifra_flags & IN6_IFF_AUTOCONF); + pr0.ndpr_vltime = ifra->ifra_lifetime.ia6t_vltime; + pr0.ndpr_pltime = ifra->ifra_lifetime.ia6t_pltime; + pr0.ndpr_stateflags |= NDPRF_STATIC; + lck_mtx_init(&pr0.ndpr_lock, ifa_mtx_grp, ifa_mtx_attr); + + /* add the prefix if there's one. */ + if ((pr = nd6_prefix_lookup(&pr0)) == NULL) { + /* + * nd6_prelist_add will install the corresponding interface + * route. + */ + error = nd6_prelist_add(&pr0, NULL, &pr, FALSE); + if (error != 0) + goto done; + + if (pr == NULL) { + log(LOG_ERR, "%s: nd6_prelist_add okay, but" + " no prefix.\n", __func__); + error = EINVAL; + goto done; + } } - else { + + IFA_LOCK(&ia->ia_ifa); + + /* if this is a new autoconfed addr */ + addtmp = FALSE; + if ((ia->ia6_flags & IN6_IFF_AUTOCONF) != 0 && ia->ia6_ndpr == NULL) { + NDPR_LOCK(pr); + ++pr->ndpr_addrcnt; + VERIFY(pr->ndpr_addrcnt != 0); + ia->ia6_ndpr = pr; + NDPR_ADDREF_LOCKED(pr); /* for addr reference */ + /* - * In this case, ia must not be NULL. We just use its prefix - * length. + * If this is the first autoconf address from the prefix, + * create a temporary address as well (when specified). */ - plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); + addtmp = (ip6_use_tempaddr && pr->ndpr_addrcnt == 1); + NDPR_UNLOCK(pr); } + + IFA_UNLOCK(&ia->ia_ifa); + + if (addtmp) { + int e; + e = in6_tmpifadd(ia, 1); + if (e != 0) + log(LOG_NOTICE, "%s: failed to create a" + " temporary address, error=%d\n", + __func__, e); + } + /* - * If the destination address on a p2p interface is specified, - * and the address is a scoped one, validate/set the scope - * zone identifier. + * This might affect the status of autoconfigured addresses, that is, + * this address might make other addresses detached. */ - dst6 = ifra->ifra_dstaddr; - if ((ifp->if_flags & (IFF_POINTOPOINT|IFF_LOOPBACK)) && - (dst6.sin6_family == AF_INET6)) { - int scopeid; - -#ifndef SCOPEDROUTING - if ((error = in6_recoverscope(&dst6, - &ifra->ifra_dstaddr.sin6_addr, - ifp)) != 0) - return(error); -#endif - scopeid = in6_addr2scopeid(ifp, &dst6.sin6_addr); - if (dst6.sin6_scope_id == 0) /* user omit to specify the ID. */ - dst6.sin6_scope_id = scopeid; - else if (dst6.sin6_scope_id != scopeid) - return(EINVAL); /* scope ID mismatch. */ -#ifndef SCOPEDROUTING - if ((error = in6_embedscope(&dst6.sin6_addr, &dst6, NULL, NULL)) - != 0) - return(error); - dst6.sin6_scope_id = 0; /* XXX */ -#endif + lck_mtx_lock(nd6_mutex); + pfxlist_onlink_check(); + lck_mtx_unlock(nd6_mutex); + + /* Drop use count held above during lookup/add */ + NDPR_REMREF(pr); + +done: + if (ia != NULL) + IFA_REMREF(&ia->ia_ifa); + return (error); +} + +static __attribute__((noinline)) void +in6ctl_difaddr(struct ifnet *ifp, struct in6_ifaddr *ia) +{ + int i = 0; + struct nd_prefix pr0, *pr; + + VERIFY(ifp != NULL && ia != NULL); + + /* + * If the address being deleted is the only one that owns + * the corresponding prefix, expire the prefix as well. + * XXX: theoretically, we don't have to worry about such + * relationship, since we separate the address management + * and the prefix management. We do this, however, to provide + * as much backward compatibility as possible in terms of + * the ioctl operation. + * Note that in6_purgeaddr() will decrement ndpr_addrcnt. + */ + IFA_LOCK(&ia->ia_ifa); + bzero(&pr0, sizeof (pr0)); + pr0.ndpr_ifp = ifp; + pr0.ndpr_plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); + if (pr0.ndpr_plen == 128) { + IFA_UNLOCK(&ia->ia_ifa); + goto purgeaddr; + } + pr0.ndpr_prefix = ia->ia_addr; + pr0.ndpr_mask = ia->ia_prefixmask.sin6_addr; + for (i = 0; i < 4; i++) { + pr0.ndpr_prefix.sin6_addr.s6_addr32[i] &= + ia->ia_prefixmask.sin6_addr.s6_addr32[i]; } + IFA_UNLOCK(&ia->ia_ifa); /* - * The destination address can be specified only for a p2p or a - * loopback interface. If specified, the corresponding prefix length - * must be 128. + * The logic of the following condition is a bit complicated. + * We expire the prefix when + * 1. the address obeys autoconfiguration and it is the + * only owner of the associated prefix, or + * 2. the address does not obey autoconf and there is no + * other owner of the prefix. */ - if (ifra->ifra_dstaddr.sin6_family == AF_INET6) { - if ((ifp->if_flags & (IFF_POINTOPOINT|IFF_LOOPBACK)) == 0) { - /* XXX: noisy message */ - log(LOG_INFO, "in6_update_ifa: a destination can be " - "specified for a p2p or a loopback IF only\n"); - return(EINVAL); - } - if (plen != 128) { - /* - * The following message seems noisy, but we dare to - * add it for diagnosis. - */ - log(LOG_INFO, "in6_update_ifa: prefixlen must be 128 " - "when dstaddr is specified\n"); - return(EINVAL); + if ((pr = nd6_prefix_lookup(&pr0)) != NULL) { + IFA_LOCK(&ia->ia_ifa); + NDPR_LOCK(pr); + if (((ia->ia6_flags & IN6_IFF_AUTOCONF) != 0 && + pr->ndpr_addrcnt == 1) || + ((ia->ia6_flags & IN6_IFF_AUTOCONF) == 0 && + pr->ndpr_addrcnt == 0)) { + /* XXX: just for expiration */ + pr->ndpr_expire = 1; } - } - /* lifetime consistency check */ + NDPR_UNLOCK(pr); + IFA_UNLOCK(&ia->ia_ifa); - getmicrotime(&timenow); - lt = &ifra->ifra_lifetime; - if (lt->ia6t_vltime != ND6_INFINITE_LIFETIME - && lt->ia6t_vltime + timenow.tv_sec < timenow.tv_sec) { - return EINVAL; + /* Drop use count held above during lookup */ + NDPR_REMREF(pr); } - if (lt->ia6t_vltime == 0) { + +purgeaddr: + in6_purgeaddr(&ia->ia_ifa); +} + +static __attribute__((noinline)) int +in6_autoconf(struct ifnet *ifp, int enable) +{ + int error = 0; + + VERIFY(ifp != NULL); + + if (ifp->if_flags & IFF_LOOPBACK) + return (EINVAL); + + if (enable) { /* - * the following log might be noisy, but this is a typical - * configuration mistake or a tool's bug. + * An interface in IPv6 router mode implies that it + * is either configured with a static IP address or + * autoconfigured via a locally-generated RA. Prevent + * SIOCAUTOCONF_START from being set in that mode. */ - log(LOG_INFO, - "in6_update_ifa: valid lifetime is 0 for %s\n", - ip6_sprintf(&ifra->ifra_addr.sin6_addr)); + ifnet_lock_exclusive(ifp); + if (ifp->if_eflags & IFEF_IPV6_ROUTER) { + ifp->if_eflags &= ~IFEF_ACCEPT_RTADV; + error = EBUSY; + } else { + ifp->if_eflags |= IFEF_ACCEPT_RTADV; + } + ifnet_lock_done(ifp); + } else { + struct in6_ifaddr *ia = NULL; + + ifnet_lock_exclusive(ifp); + ifp->if_eflags &= ~IFEF_ACCEPT_RTADV; + ifnet_lock_done(ifp); + + /* Remove autoconfigured address from interface */ + lck_rw_lock_exclusive(&in6_ifaddr_rwlock); + ia = in6_ifaddrs; + while (ia != NULL) { + if (ia->ia_ifa.ifa_ifp != ifp) { + ia = ia->ia_next; + continue; + } + IFA_LOCK(&ia->ia_ifa); + if (ia->ia6_flags & IN6_IFF_AUTOCONF) { + IFA_ADDREF_LOCKED(&ia->ia_ifa); /* for us */ + IFA_UNLOCK(&ia->ia_ifa); + lck_rw_done(&in6_ifaddr_rwlock); + in6_purgeaddr(&ia->ia_ifa); + IFA_REMREF(&ia->ia_ifa); /* for us */ + lck_rw_lock_exclusive(&in6_ifaddr_rwlock); + /* + * Purging the address caused in6_ifaddr_rwlock + * to be dropped and reacquired; + * therefore search again from the beginning + * of in6_ifaddrs list. + */ + ia = in6_ifaddrs; + continue; + } + IFA_UNLOCK(&ia->ia_ifa); + ia = ia->ia_next; + } + lck_rw_done(&in6_ifaddr_rwlock); } - if (lt->ia6t_pltime != ND6_INFINITE_LIFETIME - && lt->ia6t_pltime + timenow.tv_sec < timenow.tv_sec) { - return EINVAL; + return (error); +} + +/* + * Handle SIOCSETROUTERMODE_IN6 to set or clear the IPv6 router mode flag on + * the interface. Entering or exiting this mode will result in the removal of + * autoconfigured IPv6 addresses on the interface. + */ +static __attribute__((noinline)) int +in6_setrouter(struct ifnet *ifp, int enable) +{ + VERIFY(ifp != NULL); + + if (ifp->if_flags & IFF_LOOPBACK) + return (ENODEV); + + if (enable) { + struct nd_ifinfo *ndi; + + lck_rw_lock_shared(nd_if_rwlock); + ndi = ND_IFINFO(ifp); + if (ndi != NULL && ndi->initialized) { + lck_mtx_lock(&ndi->lock); + if (ndi->flags & ND6_IFF_PROXY_PREFIXES) { + /* No proxy if we are an advertising router */ + ndi->flags &= ~ND6_IFF_PROXY_PREFIXES; + lck_mtx_unlock(&ndi->lock); + lck_rw_done(nd_if_rwlock); + (void) nd6_if_prproxy(ifp, FALSE); + } else { + lck_mtx_unlock(&ndi->lock); + lck_rw_done(nd_if_rwlock); + } + } else { + lck_rw_done(nd_if_rwlock); + } + } + + ifnet_lock_exclusive(ifp); + if (enable) { + ifp->if_eflags |= IFEF_IPV6_ROUTER; + } else { + ifp->if_eflags &= ~IFEF_IPV6_ROUTER; } + ifnet_lock_done(ifp); + + lck_mtx_lock(nd6_mutex); + defrouter_select(ifp); + lck_mtx_unlock(nd6_mutex); + + if_allmulti(ifp, enable); + + return (in6_autoconf(ifp, FALSE)); +} + +static int +in6_to_kamescope(struct sockaddr_in6 *sin6, struct ifnet *ifp) +{ + struct sockaddr_in6 tmp; + int error, id; + + VERIFY(sin6 != NULL); + tmp = *sin6; + + error = in6_recoverscope(&tmp, &sin6->sin6_addr, ifp); + if (error != 0) + return (error); + + id = in6_addr2scopeid(ifp, &tmp.sin6_addr); + if (tmp.sin6_scope_id == 0) + tmp.sin6_scope_id = id; + else if (tmp.sin6_scope_id != id) + return (EINVAL); /* scope ID mismatch. */ + + error = in6_embedscope(&tmp.sin6_addr, &tmp, NULL, NULL, NULL); + if (error != 0) + return (error); + + tmp.sin6_scope_id = 0; + *sin6 = tmp; + return (0); +} + +static int +in6_ifaupdate_aux(struct in6_ifaddr *ia, struct ifnet *ifp, int ifaupflags) +{ + struct sockaddr_in6 mltaddr, mltmask; + struct in6_addr llsol; + struct ifaddr *ifa; + struct in6_multi *in6m_sol; + struct in6_multi_mship *imm; + struct rtentry *rt; + int delay, error; + + VERIFY(ifp != NULL && ia != NULL); + ifa = &ia->ia_ifa; + in6m_sol = NULL; /* - * If this is a new address, allocate a new ifaddr and link it - * into chains. + * Mark the address as tentative before joining multicast addresses, + * so that corresponding MLD responses would not have a tentative + * source address. */ - if (ia == NULL) { - hostIsNew = 1; + ia->ia6_flags &= ~IN6_IFF_DUPLICATED; /* safety */ + if (in6if_do_dad(ifp)) + in6_ifaddr_set_dadprogress(ia); + + /* Join necessary multicast groups */ + if ((ifp->if_flags & IFF_MULTICAST) != 0) { + + /* join solicited multicast addr for new host id */ + bzero(&llsol, sizeof (struct in6_addr)); + llsol.s6_addr32[0] = IPV6_ADDR_INT32_MLL; + llsol.s6_addr32[1] = 0; + llsol.s6_addr32[2] = htonl(1); + llsol.s6_addr32[3] = ia->ia_addr.sin6_addr.s6_addr32[3]; + llsol.s6_addr8[12] = 0xff; + if ((error = in6_setscope(&llsol, ifp, NULL)) != 0) { + /* XXX: should not happen */ + log(LOG_ERR, "%s: in6_setscope failed\n", __func__); + goto unwind; + } + delay = 0; + if ((ifaupflags & IN6_IFAUPDATE_DADDELAY)) { + /* + * We need a random delay for DAD on the address + * being configured. It also means delaying + * transmission of the corresponding MLD report to + * avoid report collision. [RFC 4862] + */ + delay = random() % MAX_RTR_SOLICITATION_DELAY; + } + imm = in6_joingroup(ifp, &llsol, &error, delay); + if (imm == NULL) { + nd6log((LOG_WARNING, + "%s: addmulti failed for %s on %s (errno=%d)\n", + __func__, ip6_sprintf(&llsol), if_name(ifp), + error)); + VERIFY(error != 0); + goto unwind; + } + in6m_sol = imm->i6mm_maddr; + /* take a refcount for this routine */ + IN6M_ADDREF(in6m_sol); + + IFA_LOCK_SPIN(ifa); + LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain); + IFA_UNLOCK(ifa); + + bzero(&mltmask, sizeof (mltmask)); + mltmask.sin6_len = sizeof (struct sockaddr_in6); + mltmask.sin6_family = AF_INET6; + mltmask.sin6_addr = in6mask32; +#define MLTMASK_LEN 4 /* mltmask's masklen (=32bit=4octet) */ + /* - * When in6_update_ifa() is called in a process of a received - * RA, it is called under splnet(). So, we should call malloc - * with M_NOWAIT. The exception to this is during init time - * when we know it's okay to do M_WAITOK, hence the check - * against in6_init2done flag to see if it's not yet set. + * join link-local all-nodes address */ - ia = (struct in6_ifaddr *) _MALLOC(sizeof(*ia), M_IFADDR, - in6_init2done ? M_NOWAIT : M_WAITOK); - if (ia == NULL) - return ENOBUFS; - bzero((caddr_t)ia, sizeof(*ia)); - /* Initialize the address and masks */ - ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr; - ia->ia_addr.sin6_family = AF_INET6; - ia->ia_addr.sin6_len = sizeof(ia->ia_addr); - if ((ifp->if_flags & (IFF_POINTOPOINT | IFF_LOOPBACK)) != 0) { + bzero(&mltaddr, sizeof (mltaddr)); + mltaddr.sin6_len = sizeof (struct sockaddr_in6); + mltaddr.sin6_family = AF_INET6; + mltaddr.sin6_addr = in6addr_linklocal_allnodes; + if ((error = in6_setscope(&mltaddr.sin6_addr, ifp, NULL)) != 0) + goto unwind; /* XXX: should not fail */ + + /* + * XXX: do we really need this automatic routes? + * We should probably reconsider this stuff. Most applications + * actually do not need the routes, since they usually specify + * the outgoing interface. + */ + rt = rtalloc1_scoped((struct sockaddr *)&mltaddr, 0, 0UL, + ia->ia_ifp->if_index); + if (rt) { + if (memcmp(&mltaddr.sin6_addr, &((struct sockaddr_in6 *) + (void *)rt_key(rt))->sin6_addr, MLTMASK_LEN)) { + rtfree(rt); + rt = NULL; + } + } + if (!rt) { + error = rtrequest_scoped(RTM_ADD, + (struct sockaddr *)&mltaddr, + (struct sockaddr *)&ia->ia_addr, + (struct sockaddr *)&mltmask, RTF_UP | RTF_CLONING, + NULL, ia->ia_ifp->if_index); + if (error) + goto unwind; + } else { + rtfree(rt); + } + + imm = in6_joingroup(ifp, &mltaddr.sin6_addr, &error, 0); + if (!imm) { + nd6log((LOG_WARNING, + "%s: addmulti failed for %s on %s (errno=%d)\n", + __func__, ip6_sprintf(&mltaddr.sin6_addr), + if_name(ifp), error)); + VERIFY(error != 0); + goto unwind; + } + IFA_LOCK_SPIN(ifa); + LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain); + IFA_UNLOCK(ifa); + + /* + * join node information group address + */ +#define hostnamelen strlen(hostname) + delay = 0; + if ((ifaupflags & IN6_IFAUPDATE_DADDELAY)) { /* - * XXX: some functions expect that ifa_dstaddr is not - * NULL for p2p interfaces. + * The spec doesn't say anything about delay for this + * group, but the same logic should apply. */ - ia->ia_ifa.ifa_dstaddr - = (struct sockaddr *)&ia->ia_dstaddr; - } else { - ia->ia_ifa.ifa_dstaddr = NULL; + delay = random() % MAX_RTR_SOLICITATION_DELAY; + } + if (in6_nigroup(ifp, hostname, hostnamelen, &mltaddr.sin6_addr) + == 0) { + imm = in6_joingroup(ifp, &mltaddr.sin6_addr, &error, + delay); /* XXX jinmei */ + if (!imm) { + nd6log((LOG_WARNING, + "%s: addmulti failed for %s on %s " + "(errno=%d)\n", + __func__, ip6_sprintf(&mltaddr.sin6_addr), + if_name(ifp), error)); + /* XXX not very fatal, go on... */ + error = 0; + } else { + IFA_LOCK_SPIN(ifa); + LIST_INSERT_HEAD(&ia->ia6_memberships, + imm, i6mm_chain); + IFA_UNLOCK(ifa); + } + } +#undef hostnamelen + + /* + * join interface-local all-nodes address. + * (ff01::1%ifN, and ff01::%ifN/32) + */ + mltaddr.sin6_addr = in6addr_nodelocal_allnodes; + if ((error = in6_setscope(&mltaddr.sin6_addr, ifp, NULL)) != 0) + goto unwind; /* XXX: should not fail */ + /* XXX: again, do we really need the route? */ + rt = rtalloc1_scoped((struct sockaddr *)&mltaddr, 0, 0UL, + ia->ia_ifp->if_index); + if (rt) { + if (memcmp(&mltaddr.sin6_addr, &((struct sockaddr_in6 *) + (void *)rt_key(rt))->sin6_addr, MLTMASK_LEN)) { + rtfree(rt); + rt = NULL; + } + } + if (!rt) { + error = rtrequest_scoped(RTM_ADD, + (struct sockaddr *)&mltaddr, + (struct sockaddr *)&ia->ia_addr, + (struct sockaddr *)&mltmask, RTF_UP | RTF_CLONING, + NULL, ia->ia_ifp->if_index); + if (error) + goto unwind; + } else + rtfree(rt); + + imm = in6_joingroup(ifp, &mltaddr.sin6_addr, &error, 0); + if (!imm) { + nd6log((LOG_WARNING, + "%s: addmulti failed for %s on %s (errno=%d)\n", + __func__, ip6_sprintf(&mltaddr.sin6_addr), + if_name(ifp), error)); + VERIFY(error != 0); + goto unwind; + } + IFA_LOCK(ifa); + LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain); + IFA_UNLOCK(ifa); + } +#undef MLTMASK_LEN + + /* + * Make sure to initialize ND6 information. this is to workaround + * issues with interfaces with IPv6 addresses, which have never brought + * up. We are assuming that it is safe to nd6_ifattach multiple times. + * NOTE: this is how stf0 gets initialized + */ + if ((error = nd6_ifattach(ifp)) != 0) + goto unwind; + + /* Ensure nd6_service() is scheduled as soon as it's convenient */ + ++nd6_sched_timeout_want; + + /* + * Perform DAD, if needed. + * XXX It may be of use, if we can administratively + * disable DAD. + */ + IFA_LOCK_SPIN(ifa); + if (in6if_do_dad(ifp) && ((ifa->ifa_flags & IN6_IFF_NODAD) == 0) && + (ia->ia6_flags & IN6_IFF_DADPROGRESS)) { + int mindelay, maxdelay; + int *delayptr, delayval; + + IFA_UNLOCK(ifa); + delayptr = NULL; + if ((ifaupflags & IN6_IFAUPDATE_DADDELAY)) { + /* + * We need to impose a delay before sending an NS + * for DAD. Check if we also needed a delay for the + * corresponding MLD message. If we did, the delay + * should be larger than the MLD delay (this could be + * relaxed a bit, but this simple logic is at least + * safe). + */ + mindelay = 0; + if (in6m_sol != NULL) { + IN6M_LOCK(in6m_sol); + if (in6m_sol->in6m_state == + MLD_REPORTING_MEMBER) + mindelay = in6m_sol->in6m_timer; + IN6M_UNLOCK(in6m_sol); + } + maxdelay = MAX_RTR_SOLICITATION_DELAY * hz; + if (maxdelay - mindelay == 0) + delayval = 0; + else { + delayval = + (random() % (maxdelay - mindelay)) + + mindelay; + } + delayptr = &delayval; } - ia->ia_ifa.ifa_netmask - = (struct sockaddr *)&ia->ia_prefixmask; - ia->ia_ifp = ifp; - lck_mtx_lock(nd6_mutex); - if ((oia = in6_ifaddrs) != NULL) { - for ( ; oia->ia_next; oia = oia->ia_next) - continue; - oia->ia_next = ia; - } else - in6_ifaddrs = ia; - lck_mtx_unlock(nd6_mutex); + nd6_dad_start((struct ifaddr *)ia, delayptr); + } else { + IFA_UNLOCK(ifa); + } + + goto done; + +unwind: + VERIFY(error != 0); + in6_purgeaddr(&ia->ia_ifa); + +done: + /* release reference held for this routine */ + if (in6m_sol != NULL) + IN6M_REMREF(in6m_sol); + return (error); +} + +/* + * Request an IPv6 interface address. If the address is new, then it will be + * constructed and appended to the interface address chains. The interface + * address structure is optionally returned with a reference for the caller. + */ +int +in6_update_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra, int ifaupflags, + struct in6_ifaddr **iar) +{ + struct in6_addrlifetime ia6_lt; + struct in6_ifaddr *ia; + struct ifaddr *ifa; + struct ifaddr *xifa; + struct in6_addrlifetime *lt; + uint64_t timenow; + int plen, error; + + /* Sanity check parameters and initialize locals */ + VERIFY(ifp != NULL && ifra != NULL && iar != NULL); + ia = NULL; + ifa = NULL; + error = 0; + + /* + * We always require users to specify a valid IPv6 address for + * the corresponding operation. + */ + if (ifra->ifra_addr.sin6_family != AF_INET6 || + ifra->ifra_addr.sin6_len != sizeof (struct sockaddr_in6)) { + error = EAFNOSUPPORT; + goto unwind; + } - ifnet_lock_exclusive(ifp); - if_attach_ifa(ifp, &ia->ia_ifa); - ifnet_lock_done(ifp); + /* Validate ifra_prefixmask.sin6_len is properly bounded. */ + if (ifra->ifra_prefixmask.sin6_len == 0 || + ifra->ifra_prefixmask.sin6_len > sizeof (struct sockaddr_in6)) { + error = EINVAL; + goto unwind; + } + + /* Validate prefix length extracted from ifra_prefixmask structure. */ + plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr, + (u_char *)&ifra->ifra_prefixmask + ifra->ifra_prefixmask.sin6_len); + if (plen <= 0) { + error = EINVAL; + goto unwind; } - /* set prefix mask */ - if (ifra->ifra_prefixmask.sin6_len) { + /* Validate lifetimes */ + lt = &ifra->ifra_lifetime; + if (lt->ia6t_pltime > lt->ia6t_vltime) { + log(LOG_INFO, + "%s: pltime 0x%x > vltime 0x%x for %s\n", __func__, + lt->ia6t_pltime, lt->ia6t_vltime, + ip6_sprintf(&ifra->ifra_addr.sin6_addr)); + error = EINVAL; + goto unwind; + } + if (lt->ia6t_vltime == 0) { /* - * We prohibit changing the prefix length of an existing - * address, because - * + such an operation should be rare in IPv6, and - * + the operation would confuse prefix management. + * the following log might be noisy, but this is a typical + * configuration mistake or a tool's bug. */ - if (ia->ia_prefixmask.sin6_len && - in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL) != plen) { - log(LOG_INFO, "in6_update_ifa: the prefix length of an" - " existing (%s) address should not be changed\n", - ip6_sprintf(&ia->ia_addr.sin6_addr)); - error = EINVAL; - goto unlink; - } - ia->ia_prefixmask = ifra->ifra_prefixmask; + log(LOG_INFO, "%s: valid lifetime is 0 for %s\n", __func__, + ip6_sprintf(&ifra->ifra_addr.sin6_addr)); } /* - * If a new destination address is specified, scrub the old one and - * install the new destination. Note that the interface must be - * p2p or loopback (see the check above.) + * Before we lock the ifnet structure, we first check to see if the + * address already exists. If so, then we don't allocate and link a + * new one here. */ - if (dst6.sin6_family == AF_INET6 && - !IN6_ARE_ADDR_EQUAL(&dst6.sin6_addr, - &ia->ia_dstaddr.sin6_addr)) { - int e; - - if ((ia->ia_flags & IFA_ROUTE) != 0 && - (e = rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST)) - != 0) { - log(LOG_ERR, "in6_update_ifa: failed to remove " - "a route to the old destination: %s\n", - ip6_sprintf(&ia->ia_addr.sin6_addr)); - /* proceed anyway... */ - } - else - ia->ia_flags &= ~IFA_ROUTE; - ia->ia_dstaddr = dst6; - } - - /* reset the interface and routing table appropriately. */ - if ((error = in6_ifinit(ifp, ia, &ifra->ifra_addr, hostIsNew)) != 0) - goto unlink; + ia = in6ifa_ifpwithaddr(ifp, &ifra->ifra_addr.sin6_addr); + if (ia != NULL) + ifa = &ia->ia_ifa; /* - * Beyond this point, we should call in6_purgeaddr upon an error, - * not just go to unlink. + * Validate destination address on interface types that require it. */ + if ((ifp->if_flags & (IFF_LOOPBACK|IFF_POINTOPOINT)) != 0) { + switch (ifra->ifra_dstaddr.sin6_family) { + case AF_INET6: + if (plen != 128) { + /* noisy message for diagnostic purposes */ + log(LOG_INFO, + "%s: prefix length < 128 with" + " explicit dstaddr.\n", __func__); + error = EINVAL; + goto unwind; + } + break; -#if 0 /* disable this mechanism for now */ - /* update prefix list */ - if (hostIsNew && - (ifra->ifra_flags & IN6_IFF_NOPFX) == 0) { /* XXX */ - int iilen; + case AF_UNSPEC: + break; - iilen = (sizeof(ia->ia_prefixmask.sin6_addr) << 3) - plen; - if ((error = in6_prefix_add_ifid(iilen, ia)) != 0) { - in6_purgeaddr((struct ifaddr *)ia, 0); - return(error); + default: + error = EAFNOSUPPORT; + goto unwind; } + } else if (ifra->ifra_dstaddr.sin6_family != AF_UNSPEC) { + log(LOG_INFO, + "%s: dstaddr valid only on p2p and loopback interfaces.\n", + __func__); + error = EINVAL; + goto unwind; } -#endif - if ((ifp->if_flags & IFF_MULTICAST) != 0) { - struct sockaddr_in6 mltaddr, mltmask; - struct in6_multi *in6m; + timenow = net_uptime(); - if (hostIsNew) { - /* - * join solicited multicast addr for new host id - */ - struct in6_addr llsol; - bzero(&llsol, sizeof(struct in6_addr)); - llsol.s6_addr16[0] = htons(0xff02); - llsol.s6_addr16[1] = htons(ifp->if_index); - llsol.s6_addr32[1] = 0; - llsol.s6_addr32[2] = htonl(1); - llsol.s6_addr32[3] = - ifra->ifra_addr.sin6_addr.s6_addr32[3]; - llsol.s6_addr8[12] = 0xff; - (void)in6_addmulti(&llsol, ifp, &error, 0); - if (error != 0) { - log(LOG_WARNING, - "in6_update_ifa: addmulti failed for " - "%s on %s (errno=%d)\n", - ip6_sprintf(&llsol), if_name(ifp), - error); - in6_purgeaddr((struct ifaddr *)ia, 0); - return(error); - } + if (ia == NULL) { + int how; + + /* Is this the first new IPv6 address for the interface? */ + ifaupflags |= IN6_IFAUPDATE_NEWADDR; + + /* Allocate memory for IPv6 interface address structure. */ + how = !(ifaupflags & IN6_IFAUPDATE_NOWAIT) ? M_WAITOK : 0; + ia = in6_ifaddr_alloc(how); + if (ia == NULL) { + error = ENOBUFS; + goto unwind; } - bzero(&mltmask, sizeof(mltmask)); - mltmask.sin6_len = sizeof(struct sockaddr_in6); - mltmask.sin6_family = AF_INET6; - mltmask.sin6_addr = in6mask32; + ifa = &ia->ia_ifa; /* - * join link-local all-nodes address + * Initialize interface address structure. + * + * Note well: none of these sockaddr_in6 structures contain a + * valid sin6_port, sin6_flowinfo or even a sin6_scope_id field. + * We still embed link-local scope identifiers at the end of an + * arbitrary fe80::/32 prefix, for historical reasons. Also, the + * ifa_dstaddr field is always non-NULL on point-to-point and + * loopback interfaces, and conventionally points to a socket + * address of AF_UNSPEC family when there is no destination. + * + * Please enjoy the dancing sea turtle. */ - bzero(&mltaddr, sizeof(mltaddr)); - mltaddr.sin6_len = sizeof(struct sockaddr_in6); - mltaddr.sin6_family = AF_INET6; - mltaddr.sin6_addr = in6addr_linklocal_allnodes; - mltaddr.sin6_addr.s6_addr16[1] = htons(ifp->if_index); - - ifnet_lock_shared(ifp); - IN6_LOOKUP_MULTI(mltaddr.sin6_addr, ifp, in6m); - ifnet_lock_done(ifp); - if (in6m == NULL) { - rtrequest(RTM_ADD, - (struct sockaddr *)&mltaddr, - (struct sockaddr *)&ia->ia_addr, - (struct sockaddr *)&mltmask, - RTF_UP|RTF_CLONING, /* xxx */ - (struct rtentry **)0); - (void)in6_addmulti(&mltaddr.sin6_addr, ifp, &error, 0); - if (error != 0) { - log(LOG_WARNING, - "in6_update_ifa: addmulti failed for " - "%s on %s (errno=%d)\n", - ip6_sprintf(&mltaddr.sin6_addr), - if_name(ifp), error); - } + IFA_ADDREF(ifa); /* for this and optionally for caller */ + ifa->ifa_addr = (struct sockaddr *)&ia->ia_addr; + if (ifra->ifra_dstaddr.sin6_family == AF_INET6 || + (ifp->if_flags & (IFF_POINTOPOINT | IFF_LOOPBACK)) != 0) + ifa->ifa_dstaddr = (struct sockaddr *)&ia->ia_dstaddr; + ifa->ifa_netmask = (struct sockaddr *)&ia->ia_prefixmask; + ifa->ifa_ifp = ifp; + ifa->ifa_metric = ifp->if_metric; + ifa->ifa_rtrequest = nd6_rtrequest; + + LIST_INIT(&ia->ia6_memberships); + ia->ia_addr.sin6_family = AF_INET6; + ia->ia_addr.sin6_len = sizeof (ia->ia_addr); + ia->ia_addr.sin6_addr = ifra->ifra_addr.sin6_addr; + ia->ia_prefixmask.sin6_family = AF_INET6; + ia->ia_prefixmask.sin6_len = sizeof (ia->ia_prefixmask); + ia->ia_prefixmask.sin6_addr = ifra->ifra_prefixmask.sin6_addr; + error = in6_to_kamescope(&ia->ia_addr, ifp); + if (error != 0) + goto unwind; + if (ifa->ifa_dstaddr != NULL) { + ia->ia_dstaddr = ifra->ifra_dstaddr; + error = in6_to_kamescope(&ia->ia_dstaddr, ifp); + if (error != 0) + goto unwind; } - /* - * join node information group address - */ -#define hostnamelen strlen(hostname) - if (in6_nigroup(ifp, hostname, hostnamelen, &mltaddr.sin6_addr) - == 0) { - ifnet_lock_shared(ifp); - IN6_LOOKUP_MULTI(mltaddr.sin6_addr, ifp, in6m); - ifnet_lock_done(ifp); - if (in6m == NULL && ia != NULL) { - (void)in6_addmulti(&mltaddr.sin6_addr, - ifp, &error, 0); - if (error != 0) { - log(LOG_WARNING, "in6_update_ifa: " - "addmulti failed for " - "%s on %s (errno=%d)\n", - ip6_sprintf(&mltaddr.sin6_addr), - if_name(ifp), error); - } + /* Append to address chains */ + ifnet_lock_exclusive(ifp); + ifaupflags |= IN6_IFAUPDATE_1STADDR; + TAILQ_FOREACH(xifa, &ifp->if_addrlist, ifa_list) { + IFA_LOCK_SPIN(xifa); + if (xifa->ifa_addr->sa_family != AF_INET6) { + IFA_UNLOCK(xifa); + ifaupflags &= ~IN6_IFAUPDATE_1STADDR; + break; } + IFA_UNLOCK(xifa); } -#undef hostnamelen - /* - * join node-local all-nodes address, on loopback. - * XXX: since "node-local" is obsoleted by interface-local, - * we have to join the group on every interface with - * some interface-boundary restriction. - */ - if (ifp->if_flags & IFF_LOOPBACK) { - struct in6_ifaddr *ia_loop; - - struct in6_addr loop6 = in6addr_loopback; - ia_loop = in6ifa_ifpwithaddr(ifp, &loop6); - - mltaddr.sin6_addr = in6addr_nodelocal_allnodes; - - ifnet_lock_shared(ifp); - IN6_LOOKUP_MULTI(mltaddr.sin6_addr, ifp, in6m); - ifnet_lock_done(ifp); - if (in6m == NULL && ia_loop != NULL) { - rtrequest(RTM_ADD, - (struct sockaddr *)&mltaddr, - (struct sockaddr *)&ia_loop->ia_addr, - (struct sockaddr *)&mltmask, - RTF_UP, - (struct rtentry **)0); - (void)in6_addmulti(&mltaddr.sin6_addr, ifp, - &error, 0); - if (error != 0) { - log(LOG_WARNING, "in6_update_ifa: " - "addmulti failed for %s on %s " - "(errno=%d)\n", - ip6_sprintf(&mltaddr.sin6_addr), - if_name(ifp), error); - } - } + IFA_LOCK_SPIN(ifa); + if_attach_ifa(ifp, ifa); /* holds reference for ifnet link */ + IFA_UNLOCK(ifa); + ifnet_lock_done(ifp); + + lck_rw_lock_exclusive(&in6_ifaddr_rwlock); + if (in6_ifaddrs != NULL) { + struct in6_ifaddr *iac; + for (iac = in6_ifaddrs; iac->ia_next != NULL; + iac = iac->ia_next) + continue; + iac->ia_next = ia; + } else { + in6_ifaddrs = ia; } + IFA_ADDREF(ifa); /* hold for in6_ifaddrs link */ + lck_rw_done(&in6_ifaddr_rwlock); + } else { + ifa = &ia->ia_ifa; + ifaupflags &= ~(IN6_IFAUPDATE_NEWADDR|IN6_IFAUPDATE_1STADDR); } - ia->ia6_flags = ifra->ifra_flags; - ia->ia6_flags &= ~IN6_IFF_DUPLICATED; /*safety*/ - ia->ia6_flags &= ~IN6_IFF_NODAD; /* Mobile IPv6 */ - - ia->ia6_lifetime = ifra->ifra_lifetime; - /* for sanity */ - if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) { - ia->ia6_lifetime.ia6t_expire = - timenow.tv_sec + ia->ia6_lifetime.ia6t_vltime; - } else - ia->ia6_lifetime.ia6t_expire = 0; - if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) { - ia->ia6_lifetime.ia6t_preferred = - timenow.tv_sec + ia->ia6_lifetime.ia6t_pltime; - } else - ia->ia6_lifetime.ia6t_preferred = 0; + VERIFY(ia != NULL && ifa == &ia->ia_ifa); + IFA_LOCK(ifa); /* - * make sure to initialize ND6 information. this is to workaround - * issues with interfaces with IPv6 addresses, which have never brought - * up. We are assuming that it is safe to nd6_ifattach multiple times. + * Set lifetimes. We do not refer to ia6t_expire and ia6t_preferred + * to see if the address is deprecated or invalidated, but initialize + * these members for applications. */ - nd6_ifattach(ifp); + ia->ia6_updatetime = ia->ia6_createtime = timenow; + ia6_lt = *lt; + if (ia6_lt.ia6t_vltime != ND6_INFINITE_LIFETIME) + ia6_lt.ia6t_expire = timenow + ia6_lt.ia6t_vltime; + else + ia6_lt.ia6t_expire = 0; + if (ia6_lt.ia6t_pltime != ND6_INFINITE_LIFETIME) + ia6_lt.ia6t_preferred = timenow + ia6_lt.ia6t_pltime; + else + ia6_lt.ia6t_preferred = 0; + in6ifa_setlifetime(ia, &ia6_lt); /* - * Perform DAD, if needed. - * XXX It may be of use, if we can administratively - * disable DAD. + * Backward compatibility - if IN6_IFF_DEPRECATED is set from the + * userland, make it deprecated. */ - if (in6if_do_dad(ifp) && (ifra->ifra_flags & IN6_IFF_NODAD) == 0) { - ia->ia6_flags |= IN6_IFF_TENTATIVE; - nd6_dad_start((struct ifaddr *)ia, NULL); + if ((ia->ia6_flags & IN6_IFF_DEPRECATED) != 0) { + ia->ia6_lifetime.ia6ti_pltime = 0; + ia->ia6_lifetime.ia6ti_preferred = timenow; } - return(error); + /* + * Do not delay sending neighbor solicitations when using optimistic + * duplicate address detection, c.f. RFC 4429. + */ + if ((ia->ia6_flags & IN6_IFF_OPTIMISTIC) == 0) + ifaupflags |= IN6_IFAUPDATE_DADDELAY; - unlink: /* - * XXX: if a change of an existing address failed, keep the entry - * anyway. + * Update flag or prefix length */ - if (hostIsNew) - in6_unlink_ifa(ia, ifp, 0); - return(error); + ia->ia_plen = plen; + ia->ia6_flags = ifra->ifra_flags; + + /* Release locks (new address available to concurrent tasks) */ + IFA_UNLOCK(ifa); + + /* Further initialization of the interface address */ + error = in6_ifinit(ifp, ia, ifaupflags); + if (error != 0) + goto unwind; + + /* Finish updating the address while other tasks are working with it */ + error = in6_ifaupdate_aux(ia, ifp, ifaupflags); + if (error != 0) + goto unwind; + + /* Return success (optionally w/ address for caller). */ + VERIFY(error == 0); + (void) ifnet_notify_address(ifp, AF_INET6); + goto done; + +unwind: + VERIFY(error != 0); + if (ia != NULL) { + VERIFY(ifa == &ia->ia_ifa); + IFA_REMREF(ifa); + ia = NULL; + } + +done: + *iar = ia; + return (error); } void -in6_purgeaddr( - struct ifaddr *ifa, int nd6_locked) +in6_purgeaddr(struct ifaddr *ifa) { struct ifnet *ifp = ifa->ifa_ifp; - struct in6_ifaddr *ia = (struct in6_ifaddr *) ifa; + struct in6_ifaddr *ia = (struct in6_ifaddr *)ifa; + struct in6_multi_mship *imm; + + lck_mtx_assert(nd6_mutex, LCK_MTX_ASSERT_NOTOWNED); /* stop DAD processing */ nd6_dad_stop(ifa); @@ -1408,84 +2346,83 @@ in6_purgeaddr( * delete route to the destination of the address being purged. * The interface must be p2p or loopback in this case. */ - if ((ia->ia_flags & IFA_ROUTE) != 0 && ia->ia_dstaddr.sin6_len != 0) { - int e; - - if ((e = rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST)) - != 0) { + IFA_LOCK(ifa); + if ((ia->ia_flags & IFA_ROUTE) && ia->ia_plen == 128) { + int error, rtf; + + IFA_UNLOCK(ifa); + rtf = (ia->ia_dstaddr.sin6_family == AF_INET6) ? RTF_HOST : 0; + error = rtinit(&(ia->ia_ifa), RTM_DELETE, rtf); + if (error != 0) { log(LOG_ERR, "in6_purgeaddr: failed to remove " "a route to the p2p destination: %s on %s, " "errno=%d\n", ip6_sprintf(&ia->ia_addr.sin6_addr), if_name(ifp), - e); + error); /* proceed anyway... */ } - else - ia->ia_flags &= ~IFA_ROUTE; + IFA_LOCK_SPIN(ifa); + ia->ia_flags &= ~IFA_ROUTE; } + IFA_UNLOCK(ifa); /* Remove ownaddr's loopback rtentry, if it exists. */ - in6_ifremloop(&(ia->ia_ifa), nd6_locked); - - if (ifp->if_flags & IFF_MULTICAST) { - /* - * delete solicited multicast addr for deleting host id - */ - struct in6_multi *in6m; - struct in6_addr llsol; - bzero(&llsol, sizeof(struct in6_addr)); - llsol.s6_addr16[0] = htons(0xff02); - llsol.s6_addr16[1] = htons(ifp->if_index); - llsol.s6_addr32[1] = 0; - llsol.s6_addr32[2] = htonl(1); - llsol.s6_addr32[3] = - ia->ia_addr.sin6_addr.s6_addr32[3]; - llsol.s6_addr8[12] = 0xff; + in6_ifremloop(&(ia->ia_ifa)); - ifnet_lock_shared(ifp); - IN6_LOOKUP_MULTI(llsol, ifp, in6m); - ifnet_lock_done(ifp); - if (in6m) - in6_delmulti(in6m, nd6_locked); + /* + * leave from multicast groups we have joined for the interface + */ + IFA_LOCK(ifa); + while ((imm = ia->ia6_memberships.lh_first) != NULL) { + LIST_REMOVE(imm, i6mm_chain); + IFA_UNLOCK(ifa); + in6_leavegroup(imm); + IFA_LOCK(ifa); } + IFA_UNLOCK(ifa); - in6_unlink_ifa(ia, ifp, nd6_locked); + /* in6_unlink_ifa() will need exclusive access */ + in6_unlink_ifa(ia, ifp); in6_post_msg(ifp, KEV_INET6_ADDR_DELETED, ia); + + (void) ifnet_notify_address(ifp, AF_INET6); } static void -in6_unlink_ifa(ia, ifp, nd6_locked) - struct in6_ifaddr *ia; - struct ifnet *ifp; - int nd6_locked; +in6_unlink_ifa(struct in6_ifaddr *ia, struct ifnet *ifp) { - int plen, iilen; struct in6_ifaddr *oia; + struct ifaddr *ifa; + int unlinked; + + lck_mtx_assert(nd6_mutex, LCK_MTX_ASSERT_NOTOWNED); + + ifa = &ia->ia_ifa; + IFA_ADDREF(ifa); ifnet_lock_exclusive(ifp); - if_detach_ifa(ifp, &ia->ia_ifa); + IFA_LOCK(ifa); + if (ifa->ifa_debug & IFD_ATTACHED) + if_detach_ifa(ifp, ifa); + IFA_UNLOCK(ifa); ifnet_lock_done(ifp); - if (!nd6_locked) - lck_mtx_lock(nd6_mutex); + unlinked = 1; + lck_rw_lock_exclusive(&in6_ifaddr_rwlock); oia = ia; - if (oia == (ia = in6_ifaddrs)) + if (oia == (ia = in6_ifaddrs)) { in6_ifaddrs = ia->ia_next; - else { + } else { while (ia->ia_next && (ia->ia_next != oia)) ia = ia->ia_next; - if (ia->ia_next) + if (ia->ia_next) { ia->ia_next = oia->ia_next; - else { + } else { /* search failed */ - printf("Couldn't unlink in6_ifaddr from in6_ifaddr\n"); + log(LOG_NOTICE, "%s: search failed.\n", __func__); + unlinked = 0; } } - if (oia->ia6_ifpr) { /* check for safety */ - plen = in6_mask2len(&oia->ia_prefixmask.sin6_addr, NULL); - iilen = (sizeof(oia->ia_prefixmask.sin6_addr) << 3) - plen; - in6_prefix_remove_ifid(iilen, oia); - } /* * When an autoconfigured address is being removed, release the @@ -1493,48 +2430,80 @@ in6_unlink_ifa(ia, ifp, nd6_locked) * affect the status of other (detached) addresses, call * pfxlist_onlink_check(). */ + ifa = &oia->ia_ifa; + IFA_LOCK(ifa); if ((oia->ia6_flags & IN6_IFF_AUTOCONF) != 0) { if (oia->ia6_ndpr == NULL) { log(LOG_NOTICE, "in6_unlink_ifa: autoconf'ed address " - "%p has no prefix\n", oia); + "0x%llx has no prefix\n", + (uint64_t)VM_KERNEL_ADDRPERM(oia)); } else { - oia->ia6_ndpr->ndpr_refcnt--; + struct nd_prefix *pr = oia->ia6_ndpr; + oia->ia6_flags &= ~IN6_IFF_AUTOCONF; oia->ia6_ndpr = NULL; + NDPR_LOCK(pr); + VERIFY(pr->ndpr_addrcnt != 0); + pr->ndpr_addrcnt--; + NDPR_UNLOCK(pr); + NDPR_REMREF(pr); /* release addr reference */ } - - pfxlist_onlink_check(1); - } - if (!nd6_locked) + IFA_UNLOCK(ifa); + lck_rw_done(&in6_ifaddr_rwlock); + lck_mtx_lock(nd6_mutex); + pfxlist_onlink_check(); lck_mtx_unlock(nd6_mutex); - + } else { + IFA_UNLOCK(ifa); + lck_rw_done(&in6_ifaddr_rwlock); + } /* * release another refcnt for the link from in6_ifaddrs. - * Note that we should decrement the refcnt at least once for all *BSD. + * Do this only if it's not already unlinked in the event that we lost + * the race, since in6_ifaddr_rwlock was momentarily dropped above. */ - ifafree(&oia->ia_ifa); + if (unlinked) + IFA_REMREF(ifa); + + /* release reference held for this routine */ + IFA_REMREF(ifa); + /* invalidate route caches */ + routegenid_inet6_update(); } void -in6_purgeif(ifp) - struct ifnet *ifp; +in6_purgeif(struct ifnet *ifp) { - struct in6_ifaddr *ia, *nia = NULL; + struct in6_ifaddr *ia; - if (ifp == NULL || &ifp->if_addrlist == NULL) + if (ifp == NULL) return; - - lck_mtx_lock(nd6_mutex); - for (ia = in6_ifaddrs; ia != NULL; ia = nia) - { - nia = ia->ia_next; - if (ia->ia_ifa.ifa_ifp != ifp) + + lck_mtx_assert(nd6_mutex, LCK_MTX_ASSERT_NOTOWNED); + + lck_rw_lock_exclusive(&in6_ifaddr_rwlock); + ia = in6_ifaddrs; + while (ia != NULL) { + if (ia->ia_ifa.ifa_ifp != ifp) { + ia = ia->ia_next; continue; - in6_purgeaddr(&ia->ia_ifa, 1); + } + IFA_ADDREF(&ia->ia_ifa); /* for us */ + lck_rw_done(&in6_ifaddr_rwlock); + in6_purgeaddr(&ia->ia_ifa); + IFA_REMREF(&ia->ia_ifa); /* for us */ + lck_rw_lock_exclusive(&in6_ifaddr_rwlock); + /* + * Purging the address would have caused + * in6_ifaddr_rwlock to be dropped and reacquired; + * therefore search again from the beginning + * of in6_ifaddrs list. + */ + ia = in6_ifaddrs; } - lck_mtx_unlock(nd6_mutex); + lck_rw_done(&in6_ifaddr_rwlock); in6_ifdetach(ifp); } @@ -1562,28 +2531,20 @@ in6_purgeif(ifp) * RFC2373 defines interface id to be 64bit, but it allows non-RFC2374 * address encoding scheme. (see figure on page 8) */ -static int -in6_lifaddr_ioctl(so, cmd, data, ifp, p) - struct socket *so; - u_long cmd; - caddr_t data; - struct ifnet *ifp; - struct proc *p; +static __attribute__((noinline)) int +in6ctl_lifaddr(struct ifnet *ifp, u_long cmd, struct if_laddrreq *iflr, + boolean_t p64) { - struct if_laddrreq *iflr = (struct if_laddrreq *)data; + struct in6_aliasreq ifra; struct ifaddr *ifa; struct sockaddr *sa; - /* sanity checks */ - if (!data || !ifp) { - panic("invalid argument to in6_lifaddr_ioctl"); - /*NOTRECHED*/ - } + VERIFY(ifp != NULL); switch (cmd) { case SIOCGLIFADDR: /* address must be specified on GET with IFLR_PREFIX */ - if ((iflr->flags & IFLR_PREFIX) == 0) + if (!(iflr->flags & IFLR_PREFIX)) break; /* FALLTHROUGH */ case SIOCALIFADDR: @@ -1591,31 +2552,26 @@ in6_lifaddr_ioctl(so, cmd, data, ifp, p) /* address must be specified on ADD and DELETE */ sa = (struct sockaddr *)&iflr->addr; if (sa->sa_family != AF_INET6) - return EINVAL; - if (sa->sa_len != sizeof(struct sockaddr_in6)) - return EINVAL; + return (EINVAL); + if (sa->sa_len != sizeof (struct sockaddr_in6)) + return (EINVAL); /* XXX need improvement */ sa = (struct sockaddr *)&iflr->dstaddr; if (sa->sa_family && sa->sa_family != AF_INET6) - return EINVAL; - if (sa->sa_len && sa->sa_len != sizeof(struct sockaddr_in6)) - return EINVAL; + return (EINVAL); + if (sa->sa_len && sa->sa_len != sizeof (struct sockaddr_in6)) + return (EINVAL); break; - default: /* shouldn't happen */ -#if 0 - panic("invalid cmd to in6_lifaddr_ioctl"); + default: + /* shouldn't happen */ + VERIFY(0); /* NOTREACHED */ -#else - return EOPNOTSUPP; -#endif } - if (sizeof(struct in6_addr) * 8 < iflr->prefixlen) - return EINVAL; + if (sizeof (struct in6_addr) * 8 < iflr->prefixlen) + return (EINVAL); switch (cmd) { - case SIOCALIFADDR: - { - struct in6_aliasreq ifra; + case SIOCALIFADDR: { struct in6_addr hostaddr; int prefixlen; int hostid_found = 0; @@ -1630,79 +2586,111 @@ in6_lifaddr_ioctl(so, cmd, data, ifp, p) */ ifa = (struct ifaddr *)in6ifa_ifpforlinklocal(ifp, 0); if (!ifa) - return EADDRNOTAVAIL; + return (EADDRNOTAVAIL); + IFA_LOCK_SPIN(ifa); hostaddr = *IFA_IN6(ifa); + IFA_UNLOCK(ifa); hostid_found = 1; + IFA_REMREF(ifa); + ifa = NULL; - /* prefixlen must be <= 64. */ + /* prefixlen must be <= 64. */ if (64 < iflr->prefixlen) - return EINVAL; + return (EINVAL); prefixlen = iflr->prefixlen; - /* hostaddr part must be zero. */ + /* hostid part must be zero. */ sin6 = (struct sockaddr_in6 *)&iflr->addr; - if (sin6->sin6_addr.s6_addr32[2] != 0 - || sin6->sin6_addr.s6_addr32[3] != 0) { - return EINVAL; + if (sin6->sin6_addr.s6_addr32[2] != 0 || + sin6->sin6_addr.s6_addr32[3] != 0) { + return (EINVAL); } - } else + } else { prefixlen = iflr->prefixlen; - + } /* copy args to in6_aliasreq, perform ioctl(SIOCAIFADDR_IN6). */ - bzero(&ifra, sizeof(ifra)); - bcopy(iflr->iflr_name, ifra.ifra_name, - sizeof(ifra.ifra_name)); + bzero(&ifra, sizeof (ifra)); + bcopy(iflr->iflr_name, ifra.ifra_name, sizeof (ifra.ifra_name)); bcopy(&iflr->addr, &ifra.ifra_addr, - ((struct sockaddr *)&iflr->addr)->sa_len); + ((struct sockaddr *)&iflr->addr)->sa_len); if (hostid_found) { /* fill in hostaddr part */ ifra.ifra_addr.sin6_addr.s6_addr32[2] = - hostaddr.s6_addr32[2]; + hostaddr.s6_addr32[2]; ifra.ifra_addr.sin6_addr.s6_addr32[3] = - hostaddr.s6_addr32[3]; + hostaddr.s6_addr32[3]; } - if (((struct sockaddr *)&iflr->dstaddr)->sa_family) { /*XXX*/ + if (((struct sockaddr *)&iflr->dstaddr)->sa_family) { /* XXX */ bcopy(&iflr->dstaddr, &ifra.ifra_dstaddr, - ((struct sockaddr *)&iflr->dstaddr)->sa_len); + ((struct sockaddr *)&iflr->dstaddr)->sa_len); if (hostid_found) { ifra.ifra_dstaddr.sin6_addr.s6_addr32[2] = - hostaddr.s6_addr32[2]; + hostaddr.s6_addr32[2]; ifra.ifra_dstaddr.sin6_addr.s6_addr32[3] = - hostaddr.s6_addr32[3]; + hostaddr.s6_addr32[3]; } } - ifra.ifra_prefixmask.sin6_len = sizeof(struct sockaddr_in6); - in6_len2mask(&ifra.ifra_prefixmask.sin6_addr, prefixlen); + ifra.ifra_prefixmask.sin6_len = sizeof (struct sockaddr_in6); + in6_prefixlen2mask(&ifra.ifra_prefixmask.sin6_addr, prefixlen); ifra.ifra_flags = iflr->flags & ~IFLR_PREFIX; - return in6_control(so, SIOCAIFADDR_IN6, (caddr_t)&ifra, ifp, p); - } + if (!p64) { +#if defined(__LP64__) + struct in6_aliasreq_32 ifra_32; + /* + * Use 32-bit ioctl and structure for 32-bit process. + */ + in6_aliasreq_64_to_32((struct in6_aliasreq_64 *)&ifra, + &ifra_32); + return (in6_control(NULL, SIOCAIFADDR_IN6_32, + (caddr_t)&ifra_32, ifp, kernproc)); +#else + return (in6_control(NULL, SIOCAIFADDR_IN6, + (caddr_t)&ifra, ifp, kernproc)); +#endif /* __LP64__ */ + } else { +#if defined(__LP64__) + return (in6_control(NULL, SIOCAIFADDR_IN6, + (caddr_t)&ifra, ifp, kernproc)); +#else + struct in6_aliasreq_64 ifra_64; + /* + * Use 64-bit ioctl and structure for 64-bit process. + */ + in6_aliasreq_32_to_64((struct in6_aliasreq_32 *)&ifra, + &ifra_64); + return (in6_control(NULL, SIOCAIFADDR_IN6_64, + (caddr_t)&ifra_64, ifp, kernproc)); +#endif /* __LP64__ */ + } + /* NOTREACHED */ + } + case SIOCGLIFADDR: - case SIOCDLIFADDR: - { + case SIOCDLIFADDR: { struct in6_ifaddr *ia; struct in6_addr mask, candidate, match; struct sockaddr_in6 *sin6; int cmp; - bzero(&mask, sizeof(mask)); + bzero(&mask, sizeof (mask)); if (iflr->flags & IFLR_PREFIX) { /* lookup a prefix rather than address. */ - in6_len2mask(&mask, iflr->prefixlen); + in6_prefixlen2mask(&mask, iflr->prefixlen); sin6 = (struct sockaddr_in6 *)&iflr->addr; - bcopy(&sin6->sin6_addr, &match, sizeof(match)); + bcopy(&sin6->sin6_addr, &match, sizeof (match)); match.s6_addr32[0] &= mask.s6_addr32[0]; match.s6_addr32[1] &= mask.s6_addr32[1]; match.s6_addr32[2] &= mask.s6_addr32[2]; match.s6_addr32[3] &= mask.s6_addr32[3]; /* if you set extra bits, that's wrong */ - if (bcmp(&match, &sin6->sin6_addr, sizeof(match))) - return EINVAL; + if (bcmp(&match, &sin6->sin6_addr, sizeof (match))) + return (EINVAL); cmp = 1; } else { @@ -1711,24 +2699,28 @@ in6_lifaddr_ioctl(so, cmd, data, ifp, p) cmp = 0; /* XXX */ } else { /* on deleting an address, do exact match */ - in6_len2mask(&mask, 128); + in6_prefixlen2mask(&mask, 128); sin6 = (struct sockaddr_in6 *)&iflr->addr; - bcopy(&sin6->sin6_addr, &match, sizeof(match)); + bcopy(&sin6->sin6_addr, &match, sizeof (match)); cmp = 1; } } ifnet_lock_shared(ifp); - TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) - { - if (ifa->ifa_addr->sa_family != AF_INET6) + TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) { + IFA_LOCK(ifa); + if (ifa->ifa_addr->sa_family != AF_INET6) { + IFA_UNLOCK(ifa); continue; - if (!cmp) + } + if (!cmp) { + IFA_UNLOCK(ifa); break; + } - bcopy(IFA_IN6(ifa), &candidate, sizeof(candidate)); -#ifndef SCOPEDROUTING + bcopy(IFA_IN6(ifa), &candidate, sizeof (candidate)); + IFA_UNLOCK(ifa); /* * XXX: this is adhoc, but is necessary to allow * a user to specify fe80::/64 (not /10) for a @@ -1736,7 +2728,6 @@ in6_lifaddr_ioctl(so, cmd, data, ifp, p) */ if (IN6_IS_ADDR_LINKLOCAL(&candidate)) candidate.s6_addr16[1] = 0; -#endif candidate.s6_addr32[0] &= mask.s6_addr32[0]; candidate.s6_addr32[1] &= mask.s6_addr32[1]; candidate.s6_addr32[2] &= mask.s6_addr32[2]; @@ -1744,121 +2735,141 @@ in6_lifaddr_ioctl(so, cmd, data, ifp, p) if (IN6_ARE_ADDR_EQUAL(&candidate, &match)) break; } + if (ifa != NULL) + IFA_ADDREF(ifa); ifnet_lock_done(ifp); if (!ifa) - return EADDRNOTAVAIL; + return (EADDRNOTAVAIL); ia = ifa2ia6(ifa); if (cmd == SIOCGLIFADDR) { -#ifndef SCOPEDROUTING struct sockaddr_in6 *s6; -#endif + IFA_LOCK(ifa); /* fill in the if_laddrreq structure */ bcopy(&ia->ia_addr, &iflr->addr, ia->ia_addr.sin6_len); -#ifndef SCOPEDROUTING /* XXX see above */ s6 = (struct sockaddr_in6 *)&iflr->addr; if (IN6_IS_ADDR_LINKLOCAL(&s6->sin6_addr)) { s6->sin6_addr.s6_addr16[1] = 0; s6->sin6_scope_id = - in6_addr2scopeid(ifp, &s6->sin6_addr); + in6_addr2scopeid(ifp, &s6->sin6_addr); } -#endif if ((ifp->if_flags & IFF_POINTOPOINT) != 0) { bcopy(&ia->ia_dstaddr, &iflr->dstaddr, - ia->ia_dstaddr.sin6_len); -#ifndef SCOPEDROUTING /* XXX see above */ + ia->ia_dstaddr.sin6_len); s6 = (struct sockaddr_in6 *)&iflr->dstaddr; if (IN6_IS_ADDR_LINKLOCAL(&s6->sin6_addr)) { s6->sin6_addr.s6_addr16[1] = 0; s6->sin6_scope_id = - in6_addr2scopeid(ifp, - &s6->sin6_addr); + in6_addr2scopeid(ifp, + &s6->sin6_addr); } -#endif } else - bzero(&iflr->dstaddr, sizeof(iflr->dstaddr)); + bzero(&iflr->dstaddr, sizeof (iflr->dstaddr)); iflr->prefixlen = - in6_mask2len(&ia->ia_prefixmask.sin6_addr, - NULL); + in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); iflr->flags = ia->ia6_flags; /* XXX */ - - return 0; + IFA_UNLOCK(ifa); + IFA_REMREF(ifa); + return (0); } else { - struct in6_aliasreq ifra; - /* fill in6_aliasreq and do ioctl(SIOCDIFADDR_IN6) */ - bzero(&ifra, sizeof(ifra)); + bzero(&ifra, sizeof (ifra)); bcopy(iflr->iflr_name, ifra.ifra_name, - sizeof(ifra.ifra_name)); + sizeof (ifra.ifra_name)); + IFA_LOCK(ifa); bcopy(&ia->ia_addr, &ifra.ifra_addr, - ia->ia_addr.sin6_len); + ia->ia_addr.sin6_len); if ((ifp->if_flags & IFF_POINTOPOINT) != 0) { bcopy(&ia->ia_dstaddr, &ifra.ifra_dstaddr, - ia->ia_dstaddr.sin6_len); + ia->ia_dstaddr.sin6_len); } else { bzero(&ifra.ifra_dstaddr, - sizeof(ifra.ifra_dstaddr)); + sizeof (ifra.ifra_dstaddr)); } bcopy(&ia->ia_prefixmask, &ifra.ifra_dstaddr, - ia->ia_prefixmask.sin6_len); + ia->ia_prefixmask.sin6_len); ifra.ifra_flags = ia->ia6_flags; - return in6_control(so, SIOCDIFADDR_IN6, (caddr_t)&ifra, - ifp, p); + IFA_UNLOCK(ifa); + IFA_REMREF(ifa); + if (!p64) { +#if defined(__LP64__) + struct in6_aliasreq_32 ifra_32; + /* + * Use 32-bit structure for 32-bit process. + * SIOCDIFADDR_IN6 is encoded with in6_ifreq, + * so it stays the same since the size does + * not change. The data part of the ioctl, + * however, is of a different structure, i.e. + * in6_aliasreq. + */ + in6_aliasreq_64_to_32( + (struct in6_aliasreq_64 *)&ifra, &ifra_32); + return (in6_control(NULL, SIOCDIFADDR_IN6, + (caddr_t)&ifra_32, ifp, kernproc)); +#else + return (in6_control(NULL, SIOCDIFADDR_IN6, + (caddr_t)&ifra, ifp, kernproc)); +#endif /* __LP64__ */ + } else { +#if defined(__LP64__) + return (in6_control(NULL, SIOCDIFADDR_IN6, + (caddr_t)&ifra, ifp, kernproc)); +#else + struct in6_aliasreq_64 ifra_64; + /* + * Use 64-bit structure for 64-bit process. + * SIOCDIFADDR_IN6 is encoded with in6_ifreq, + * so it stays the same since the size does + * not change. The data part of the ioctl, + * however, is of a different structure, i.e. + * in6_aliasreq. + */ + in6_aliasreq_32_to_64( + (struct in6_aliasreq_32 *)&ifra, &ifra_64); + return (in6_control(NULL, SIOCDIFADDR_IN6, + (caddr_t)&ifra_64, ifp, kernproc)); +#endif /* __LP64__ */ + } + /* NOTREACHED */ } - } + } } - return EOPNOTSUPP; /* just for safety */ + return (EOPNOTSUPP); /* just for safety */ } /* - * Initialize an interface's intetnet6 address - * and routing table entry. + * Initialize an interface's internet6 address and routing table entry. */ static int -in6_ifinit(ifp, ia, sin6, newhost) - struct ifnet *ifp; - struct in6_ifaddr *ia; - struct sockaddr_in6 *sin6; - int newhost; +in6_ifinit(struct ifnet *ifp, struct in6_ifaddr *ia, int ifaupflags) { - int error = 0, plen, ifacount = 0; + int error; struct ifaddr *ifa; + error = 0; + ifa = &ia->ia_ifa; + /* - * Give the interface a chance to initialize - * if this is its first address, - * and to validate the address if necessary. + * NOTE: SIOCSIFADDR is defined with struct ifreq as parameter, + * but here we are sending it down to the interface with a pointer + * to struct ifaddr, for legacy reasons. */ - ifnet_lock_shared(ifp); - TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) - { - if (ifa->ifa_addr == NULL) - continue; /* just for safety */ - if (ifa->ifa_addr->sa_family != AF_INET6) - continue; - ifacount++; - } - ifnet_lock_done(ifp); - - ia->ia_addr = *sin6; - - - if (ifacount <= 1 && - (error = ifnet_ioctl(ifp, PF_INET6, SIOCSIFADDR, ia))) { - if (error) { - return(error); + if ((ifaupflags & IN6_IFAUPDATE_1STADDR) != 0) { + error = ifnet_ioctl(ifp, PF_INET6, SIOCSIFADDR, ia); + if (error != 0) { + if (error != EOPNOTSUPP) + return (error); + error = 0; } } - ia->ia_ifa.ifa_metric = ifp->if_metric; - - /* we could do in(6)_socktrim here, but just omit it at this moment. */ + IFA_LOCK(ifa); /* * Special case: @@ -1866,122 +2877,40 @@ in6_ifinit(ifp, ia, sin6, newhost) * interface, install a route to the destination as an interface * direct route. */ - plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); /* XXX */ - if (plen == 128 && ia->ia_dstaddr.sin6_family == AF_INET6) { - if ((error = rtinit(&(ia->ia_ifa), (int)RTM_ADD, - RTF_UP | RTF_HOST)) != 0) - return(error); + if (!(ia->ia_flags & IFA_ROUTE) && ia->ia_plen == 128 && + ia->ia_dstaddr.sin6_family == AF_INET6) { + IFA_UNLOCK(ifa); + error = rtinit(ifa, RTM_ADD, RTF_UP | RTF_HOST); + if (error != 0) + return (error); + IFA_LOCK(ifa); ia->ia_flags |= IFA_ROUTE; } - if (plen < 128) { + IFA_LOCK_ASSERT_HELD(ifa); + if (ia->ia_plen < 128) { /* * The RTF_CLONING flag is necessary for in6_is_ifloop_auto(). */ - ia->ia_ifa.ifa_flags |= RTF_CLONING; + ia->ia_flags |= RTF_CLONING; } - /* Add ownaddr as loopback rtentry, if necessary (ex. on p2p link). */ - if (newhost) { - /* set the rtrequest function to create llinfo */ - ia->ia_ifa.ifa_rtrequest = nd6_rtrequest; - in6_ifaddloop(&(ia->ia_ifa)); - } - - return(error); -} - -/* - * Add an address to the list of IP6 multicast addresses for a - * given interface. - */ -struct in6_multi * -in6_addmulti(maddr6, ifp, errorp, nd6_locked) - struct in6_addr *maddr6; - struct ifnet *ifp; - int *errorp; - int nd6_locked; -{ - struct in6_multi *in6m; - struct sockaddr_in6 sin6; - struct ifmultiaddr *ifma; - - *errorp = 0; - - /* - * Call generic routine to add membership or increment - * refcount. It wants addresses in the form of a sockaddr, - * so we build one here (being careful to zero the unused bytes). - */ - bzero(&sin6, sizeof sin6); - sin6.sin6_family = AF_INET6; - sin6.sin6_len = sizeof sin6; - sin6.sin6_addr = *maddr6; - *errorp = if_addmulti(ifp, (struct sockaddr *)&sin6, &ifma); - if (*errorp) { - return 0; - } + IFA_UNLOCK(ifa); - /* - * If ifma->ifma_protospec is null, then if_addmulti() created - * a new record. Otherwise, we are done. - */ - if (ifma->ifma_protospec != 0) - return ifma->ifma_protospec; - - /* XXX - if_addmulti uses M_WAITOK. Can this really be called - at interrupt time? If so, need to fix if_addmulti. XXX */ - in6m = (struct in6_multi *)_MALLOC(sizeof(*in6m), M_IPMADDR, M_NOWAIT); - if (in6m == NULL) { - return (NULL); - } + /* Add ownaddr as loopback rtentry, if necessary (ex. on p2p link). */ + if ((ifaupflags & IN6_IFAUPDATE_NEWADDR) != 0) + in6_ifaddloop(ifa); - bzero(in6m, sizeof *in6m); - in6m->in6m_addr = *maddr6; - in6m->in6m_ifp = ifp; - in6m->in6m_ifma = ifma; - ifma->ifma_protospec = in6m; - if (nd6_locked == 0) - lck_mtx_lock(nd6_mutex); - LIST_INSERT_HEAD(&in6_multihead, in6m, in6m_entry); - if (nd6_locked == 0) - lck_mtx_unlock(nd6_mutex); + /* invalidate route caches */ + routegenid_inet6_update(); - /* - * Let MLD6 know that we have joined a new IP6 multicast - * group. - */ - mld6_start_listening(in6m); - return(in6m); + VERIFY(error == 0); + return (0); } -/* - * Delete a multicast address record. - */ void -in6_delmulti( - struct in6_multi *in6m, int nd6locked) +in6_purgeaddrs(struct ifnet *ifp) { - struct ifmultiaddr *ifma = in6m->in6m_ifma; - - if (ifma && ifma->ifma_usecount == 1) { - /* - * No remaining claims to this record; let MLD6 know - * that we are leaving the multicast group. - */ - mld6_stop_listening(in6m); - ifma->ifma_protospec = 0; - if (nd6locked == 0) - lck_mtx_lock(nd6_mutex); - LIST_REMOVE(in6m, in6m_entry); - if (nd6locked == 0) - lck_mtx_unlock(nd6_mutex); - FREE(in6m, M_IPMADDR); - } - /* XXX - should be separate API for when we have an ifma? */ - if (ifma) { - if_delmultiaddr(ifma, 0); - ifma_release(ifma); - } + in6_purgeif(ifp); } /* @@ -1997,20 +2926,26 @@ in6ifa_ifpforlinklocal(ifp, ignoreflags) ifnet_lock_shared(ifp); TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) { - if (ifa->ifa_addr == NULL) - continue; /* just for safety */ - if (ifa->ifa_addr->sa_family != AF_INET6) + IFA_LOCK_SPIN(ifa); + if (ifa->ifa_addr->sa_family != AF_INET6) { + IFA_UNLOCK(ifa); continue; + } if (IN6_IS_ADDR_LINKLOCAL(IFA_IN6(ifa))) { if ((((struct in6_ifaddr *)ifa)->ia6_flags & - ignoreflags) != 0) + ignoreflags) != 0) { + IFA_UNLOCK(ifa); continue; + } + IFA_ADDREF_LOCKED(ifa); /* for caller */ + IFA_UNLOCK(ifa); break; } + IFA_UNLOCK(ifa); } ifnet_lock_done(ifp); - return((struct in6_ifaddr *)ifa); + return ((struct in6_ifaddr *)ifa); } /* @@ -2021,38 +2956,130 @@ in6ifa_ifpwithaddr(ifp, addr) struct ifnet *ifp; struct in6_addr *addr; { - struct ifaddr *ifa; + struct ifaddr *ifa; + + ifnet_lock_shared(ifp); + TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) + { + IFA_LOCK_SPIN(ifa); + if (ifa->ifa_addr->sa_family != AF_INET6) { + IFA_UNLOCK(ifa); + continue; + } + if (IN6_ARE_ADDR_EQUAL(addr, IFA_IN6(ifa))) { + IFA_ADDREF_LOCKED(ifa); /* for caller */ + IFA_UNLOCK(ifa); + break; + } + IFA_UNLOCK(ifa); + } + ifnet_lock_done(ifp); + + return ((struct in6_ifaddr *)ifa); +} + +struct in6_ifaddr * +in6ifa_prproxyaddr(struct in6_addr *addr) +{ + struct in6_ifaddr *ia; + + lck_rw_lock_shared(&in6_ifaddr_rwlock); + for (ia = in6_ifaddrs; ia; ia = ia->ia_next) { + IFA_LOCK(&ia->ia_ifa); + if (IN6_ARE_ADDR_EQUAL(addr, IFA_IN6(&ia->ia_ifa))) { + IFA_ADDREF_LOCKED(&ia->ia_ifa); /* for caller */ + IFA_UNLOCK(&ia->ia_ifa); + break; + } + IFA_UNLOCK(&ia->ia_ifa); + } + lck_rw_done(&in6_ifaddr_rwlock); + + if (ia != NULL && !nd6_prproxy_ifaddr(ia)) { + IFA_REMREF(&ia->ia_ifa); + ia = NULL; + } + + return (ia); +} + +void +in6ifa_getlifetime(struct in6_ifaddr *ia6, struct in6_addrlifetime *t_dst, + int iscalendar) +{ + struct in6_addrlifetime_i *t_src = &ia6->ia6_lifetime; + struct timeval caltime; + + t_dst->ia6t_vltime = t_src->ia6ti_vltime; + t_dst->ia6t_pltime = t_src->ia6ti_pltime; + t_dst->ia6t_expire = 0; + t_dst->ia6t_preferred = 0; + + /* account for system time change */ + getmicrotime(&caltime); + t_src->ia6ti_base_calendartime += + NET_CALCULATE_CLOCKSKEW(caltime, + t_src->ia6ti_base_calendartime, net_uptime(), + t_src->ia6ti_base_uptime); + + if (iscalendar) { + if (t_src->ia6ti_expire != 0 && + t_src->ia6ti_vltime != ND6_INFINITE_LIFETIME) + t_dst->ia6t_expire = t_src->ia6ti_base_calendartime + + t_src->ia6ti_expire - t_src->ia6ti_base_uptime; + + if (t_src->ia6ti_preferred != 0 && + t_src->ia6ti_pltime != ND6_INFINITE_LIFETIME) + t_dst->ia6t_preferred = t_src->ia6ti_base_calendartime + + t_src->ia6ti_preferred - t_src->ia6ti_base_uptime; + } else { + if (t_src->ia6ti_expire != 0 && + t_src->ia6ti_vltime != ND6_INFINITE_LIFETIME) + t_dst->ia6t_expire = t_src->ia6ti_expire; - ifnet_lock_shared(ifp); - TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) - { - if (ifa->ifa_addr == NULL) - continue; /* just for safety */ - if (ifa->ifa_addr->sa_family != AF_INET6) - continue; - if (IN6_ARE_ADDR_EQUAL(addr, IFA_IN6(ifa))) - break; + if (t_src->ia6ti_preferred != 0 && + t_src->ia6ti_pltime != ND6_INFINITE_LIFETIME) + t_dst->ia6t_preferred = t_src->ia6ti_preferred; } - ifnet_lock_done(ifp); +} - return((struct in6_ifaddr *)ifa); +void +in6ifa_setlifetime(struct in6_ifaddr *ia6, struct in6_addrlifetime *t_src) +{ + struct in6_addrlifetime_i *t_dst = &ia6->ia6_lifetime; + struct timeval caltime; + + /* account for system time change */ + getmicrotime(&caltime); + t_dst->ia6ti_base_calendartime += + NET_CALCULATE_CLOCKSKEW(caltime, + t_dst->ia6ti_base_calendartime, net_uptime(), + t_dst->ia6ti_base_uptime); + + /* trust the caller for the values */ + t_dst->ia6ti_expire = t_src->ia6t_expire; + t_dst->ia6ti_preferred = t_src->ia6t_preferred; + t_dst->ia6ti_vltime = t_src->ia6t_vltime; + t_dst->ia6ti_pltime = t_src->ia6t_pltime; } /* * Convert IP6 address to printable (loggable) representation. */ -static char digits[] = "0123456789abcdef"; -static int ip6round = 0; char * -ip6_sprintf(addr) - const struct in6_addr *addr; +ip6_sprintf(const struct in6_addr *addr) { + static const char digits[] = "0123456789abcdef"; + static int ip6round = 0; static char ip6buf[8][48]; + int i; char *cp; const u_short *a = (const u_short *)addr; const u_char *d; + u_char n; int dcolon = 0; + int zpad = 0; ip6round = (ip6round + 1) & 7; cp = ip6buf[ip6round]; @@ -2081,15 +3108,26 @@ ip6_sprintf(addr) continue; } d = (const u_char *)a; - *cp++ = digits[*d >> 4]; - *cp++ = digits[*d++ & 0xf]; - *cp++ = digits[*d >> 4]; - *cp++ = digits[*d & 0xf]; + zpad = 0; + if ((n = *d >> 4) != 0) { + *cp++ = digits[n]; + zpad = 1; + } + if ((n = *d++ & 0xf) != 0 || zpad) { + *cp++ = digits[n]; + zpad = 1; + } + if ((n = *d >> 4) != 0 || zpad) { + *cp++ = digits[n]; + zpad = 1; + } + if ((n = *d & 0xf) != 0 || zpad) + *cp++ = digits[n]; *cp++ = ':'; a++; } *--cp = 0; - return(ip6buf[ip6round]); + return (ip6buf[ip6round]); } int @@ -2099,17 +3137,19 @@ in6addr_local(struct in6_addr *in6) struct sockaddr_in6 sin6; int local = 0; - if (IN6_IS_ADDR_LOOPBACK(in6) || IN6_IS_ADDR_LINKLOCAL(in6)) + if (IN6_IS_ADDR_LOOPBACK(in6) || IN6_IS_SCOPE_LINKLOCAL(in6)) return (1); sin6.sin6_family = AF_INET6; sin6.sin6_len = sizeof (sin6); bcopy(in6, &sin6.sin6_addr, sizeof (*in6)); - rt = rtalloc1((struct sockaddr *)&sin6, 0, 0UL); + rt = rtalloc1((struct sockaddr *)&sin6, 0, 0); if (rt != NULL) { + RT_LOCK_SPIN(rt); if (rt->rt_gateway->sa_family == AF_LINK) local = 1; + RT_UNLOCK(rt); rtfree(rt); } else { local = in6_localaddr(in6); @@ -2118,49 +3158,49 @@ in6addr_local(struct in6_addr *in6) } int -in6_localaddr(in6) - struct in6_addr *in6; +in6_localaddr(struct in6_addr *in6) { struct in6_ifaddr *ia; if (IN6_IS_ADDR_LOOPBACK(in6) || IN6_IS_ADDR_LINKLOCAL(in6)) - return 1; + return (1); - lck_mtx_lock(nd6_mutex); - for (ia = in6_ifaddrs; ia; ia = ia->ia_next) + lck_rw_lock_shared(&in6_ifaddr_rwlock); + for (ia = in6_ifaddrs; ia; ia = ia->ia_next) { + IFA_LOCK_SPIN(&ia->ia_ifa); if (IN6_ARE_MASKED_ADDR_EQUAL(in6, &ia->ia_addr.sin6_addr, - &ia->ia_prefixmask.sin6_addr)) { - lck_mtx_unlock(nd6_mutex); - return 1; + &ia->ia_prefixmask.sin6_addr)) { + IFA_UNLOCK(&ia->ia_ifa); + lck_rw_done(&in6_ifaddr_rwlock); + return (1); } - - lck_mtx_unlock(nd6_mutex); + IFA_UNLOCK(&ia->ia_ifa); + } + lck_rw_done(&in6_ifaddr_rwlock); return (0); } int -in6_is_addr_deprecated(sa6) - struct sockaddr_in6 *sa6; +in6_is_addr_deprecated(struct sockaddr_in6 *sa6) { struct in6_ifaddr *ia; - lck_mtx_lock(nd6_mutex); + lck_rw_lock_shared(&in6_ifaddr_rwlock); for (ia = in6_ifaddrs; ia; ia = ia->ia_next) { + IFA_LOCK_SPIN(&ia->ia_ifa); if (IN6_ARE_ADDR_EQUAL(&ia->ia_addr.sin6_addr, - &sa6->sin6_addr) && -#if SCOPEDROUTING - ia->ia_addr.sin6_scope_id == sa6->sin6_scope_id && -#endif + &sa6->sin6_addr) && (ia->ia6_flags & IN6_IFF_DEPRECATED) != 0) { - lck_mtx_unlock(nd6_mutex); - return(1); /* true */ + IFA_UNLOCK(&ia->ia_ifa); + lck_rw_done(&in6_ifaddr_rwlock); + return (1); /* true */ } - /* XXX: do we still have to go thru the rest of the list? */ + IFA_UNLOCK(&ia->ia_ifa); } - lck_mtx_unlock(nd6_mutex); - return(0); /* false */ + lck_rw_done(&in6_ifaddr_rwlock); + return (0); /* false */ } /* @@ -2184,7 +3224,7 @@ struct in6_addr *src, *dst; break; } else match += 8; - return match; + return (match); } /* XXX: to be scope conscious */ @@ -2197,22 +3237,21 @@ in6_are_prefix_equal(p1, p2, len) /* sanity check */ if (0 > len || len > 128) { - log(LOG_ERR, "in6_are_prefix_equal: invalid prefix length(%d)\n", - len); - return(0); + log(LOG_ERR, "%s: invalid prefix length(%d)\n", __func__, len); + return (0); } bytelen = len / 8; bitlen = len % 8; if (bcmp(&p1->s6_addr, &p2->s6_addr, bytelen)) - return(0); - if (bitlen != 0 && + return (0); + if (bitlen != 0 && p1->s6_addr[bytelen] >> (8 - bitlen) != p2->s6_addr[bytelen] >> (8 - bitlen)) - return(0); + return (0); - return(1); + return (1); } void @@ -2225,12 +3264,11 @@ in6_prefixlen2mask(maskp, len) /* sanity check */ if (0 > len || len > 128) { - log(LOG_ERR, "in6_prefixlen2mask: invalid prefix length(%d)\n", - len); + log(LOG_ERR, "%s: invalid prefix length(%d)\n", __func__, len); return; } - bzero(maskp, sizeof(*maskp)); + bzero(maskp, sizeof (*maskp)); bytelen = len / 8; bitlen = len % 8; for (i = 0; i < bytelen; i++) @@ -2243,21 +3281,16 @@ in6_prefixlen2mask(maskp, len) * return the best address out of the same scope */ struct in6_ifaddr * -in6_ifawithscope( - struct ifnet *oifp, - struct in6_addr *dst) +in6_ifawithscope(struct ifnet *oifp, struct in6_addr *dst) { int dst_scope = in6_addrscope(dst), src_scope, best_scope = 0; int blen = -1; struct ifaddr *ifa; struct ifnet *ifp; struct in6_ifaddr *ifa_best = NULL; - + if (oifp == NULL) { -#if 0 - printf("in6_ifawithscope: output interface is not specified\n"); -#endif - return(NULL); + return (NULL); } /* @@ -2275,13 +3308,14 @@ in6_ifawithscope( continue; ifnet_lock_shared(ifp); - TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) - { + TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) { int tlen = -1, dscopecmp, bscopecmp, matchcmp; - if (ifa->ifa_addr->sa_family != AF_INET6) + IFA_LOCK(ifa); + if (ifa->ifa_addr->sa_family != AF_INET6) { + IFA_UNLOCK(ifa); continue; - + } src_scope = in6_addrscope(IFA_IN6(ifa)); /* @@ -2289,18 +3323,21 @@ in6_ifawithscope( * nor a duplicated address. */ if (((struct in6_ifaddr *)ifa)->ia6_flags & - IN6_IFF_NOTREADY) + IN6_IFF_NOTREADY) { + IFA_UNLOCK(ifa); continue; - + } /* XXX: is there any case to allow anycasts? */ if (((struct in6_ifaddr *)ifa)->ia6_flags & - IN6_IFF_ANYCAST) + IN6_IFF_ANYCAST) { + IFA_UNLOCK(ifa); continue; - + } if (((struct in6_ifaddr *)ifa)->ia6_flags & - IN6_IFF_DETACHED) + IN6_IFF_DETACHED) { + IFA_UNLOCK(ifa); continue; - + } /* * If this is the first address we find, * keep it anyway. @@ -2332,14 +3369,15 @@ in6_ifawithscope( IN6_ARE_SCOPE_CMP(src_scope, dst_scope) >= 0) goto replace; /* (A) */ if (IN6_ARE_SCOPE_CMP(src_scope, dst_scope) < 0 && - IN6_ARE_SCOPE_CMP(best_scope, dst_scope) >= 0) + IN6_ARE_SCOPE_CMP(best_scope, dst_scope) >= 0) { + IFA_UNLOCK(ifa); continue; /* (B) */ - + } /* * A deprecated address SHOULD NOT be used in new * communications if an alternate (non-deprecated) * address is available and has sufficient scope. - * RFC 2462, Section 5.5.4. + * RFC 4862, Section 5.5.4. */ if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) { @@ -2347,16 +3385,19 @@ in6_ifawithscope( * Ignore any deprecated addresses if * specified by configuration. */ - if (!ip6_use_deprecated) + if (!ip6_use_deprecated) { + IFA_UNLOCK(ifa); continue; - + } /* * If we have already found a non-deprecated * candidate, just ignore deprecated addresses. */ if ((ifa_best->ia6_flags & IN6_IFF_DEPRECATED) - == 0) + == 0) { + IFA_UNLOCK(ifa); continue; + } } /* @@ -2367,12 +3408,12 @@ in6_ifawithscope( */ if ((ifa_best->ia6_flags & IN6_IFF_DEPRECATED) && (((struct in6_ifaddr *)ifa)->ia6_flags & - IN6_IFF_DEPRECATED) == 0) + IN6_IFF_DEPRECATED) == 0) goto replace; /* * When we use temporary addresses described in - * RFC 3041, we prefer temporary addresses to + * RFC 4941, we prefer temporary addresses to * public autoconf addresses. Again, note the * invariants from (A) and (B). Also note that we * don't have any preference between static addresses @@ -2384,19 +3425,20 @@ in6_ifawithscope( ifat = (struct in6_ifaddr *)ifa; if ((ifa_best->ia6_flags & - (IN6_IFF_AUTOCONF|IN6_IFF_TEMPORARY)) - == IN6_IFF_AUTOCONF && + (IN6_IFF_AUTOCONF|IN6_IFF_TEMPORARY)) + == IN6_IFF_AUTOCONF && (ifat->ia6_flags & - (IN6_IFF_AUTOCONF|IN6_IFF_TEMPORARY)) - == (IN6_IFF_AUTOCONF|IN6_IFF_TEMPORARY)) { + (IN6_IFF_AUTOCONF|IN6_IFF_TEMPORARY)) + == (IN6_IFF_AUTOCONF|IN6_IFF_TEMPORARY)) { goto replace; } if ((ifa_best->ia6_flags & - (IN6_IFF_AUTOCONF|IN6_IFF_TEMPORARY)) + (IN6_IFF_AUTOCONF|IN6_IFF_TEMPORARY)) == (IN6_IFF_AUTOCONF|IN6_IFF_TEMPORARY) && (ifat->ia6_flags & - (IN6_IFF_AUTOCONF|IN6_IFF_TEMPORARY)) - == IN6_IFF_AUTOCONF) { + (IN6_IFF_AUTOCONF|IN6_IFF_TEMPORARY)) + == IN6_IFF_AUTOCONF) { + IFA_UNLOCK(ifa); continue; } } @@ -2439,17 +3481,17 @@ in6_ifawithscope( * longest address match against dst is considered. * * The precise decision table is as follows: - * dscopecmp bscopecmp match bI oI | replace? - * N/A equal N/A Y N | No (1) - * N/A equal N/A N Y | Yes (2) - * N/A equal larger N/A | Yes (3) - * N/A equal !larger N/A | No (4) - * larger larger N/A N/A | No (5) - * larger smaller N/A N/A | Yes (6) - * smaller larger N/A N/A | Yes (7) - * smaller smaller N/A N/A | No (8) - * equal smaller N/A N/A | Yes (9) - * equal larger (already done at A above) + * dscopecmp bscopecmp match bI oI | replace? + * N/A equal N/A Y N | No (1) + * N/A equal N/A N Y | Yes (2) + * N/A equal larger N/A | Yes (3) + * N/A equal !larger N/A | No (4) + * larger larger N/A N/A | No (5) + * larger smaller N/A N/A | Yes (6) + * smaller larger N/A N/A | Yes (7) + * smaller smaller N/A N/A | No (8) + * equal smaller N/A N/A | Yes (9) + * equal larger (already done at A above) */ dscopecmp = IN6_ARE_SCOPE_CMP(src_scope, dst_scope); bscopecmp = IN6_ARE_SCOPE_CMP(src_scope, best_scope); @@ -2457,8 +3499,10 @@ in6_ifawithscope( if (bscopecmp == 0) { struct ifnet *bifp = ifa_best->ia_ifp; - if (bifp == oifp && ifp != oifp) /* (1) */ + if (bifp == oifp && ifp != oifp) { /* (1) */ + IFA_UNLOCK(ifa); continue; + } if (bifp != oifp && ifp == oifp) /* (2) */ goto replace; @@ -2473,16 +3517,20 @@ in6_ifawithscope( matchcmp = tlen - blen; if (matchcmp > 0) /* (3) */ goto replace; + IFA_UNLOCK(ifa); continue; /* (4) */ } if (dscopecmp > 0) { - if (bscopecmp > 0) /* (5) */ + if (bscopecmp > 0) { /* (5) */ + IFA_UNLOCK(ifa); continue; + } goto replace; /* (6) */ } if (dscopecmp < 0) { if (bscopecmp > 0) /* (7) */ goto replace; + IFA_UNLOCK(ifa); continue; /* (8) */ } @@ -2490,14 +3538,16 @@ in6_ifawithscope( if (bscopecmp < 0) goto replace; /* (9) */ - replace: - ifaref(ifa); - if (ifa_best) - ifafree(&ifa_best->ia_ifa); - ifa_best = (struct in6_ifaddr *)ifa; +replace: + IFA_ADDREF_LOCKED(ifa); /* for ifa_best */ blen = tlen >= 0 ? tlen : - in6_matchlen(IFA_IN6(ifa), dst); - best_scope = in6_addrscope(&ifa_best->ia_addr.sin6_addr); + in6_matchlen(IFA_IN6(ifa), dst); + best_scope = + in6_addrscope(&ifa2ia6(ifa)->ia_addr.sin6_addr); + IFA_UNLOCK(ifa); + if (ifa_best) + IFA_REMREF(&ifa_best->ia_ifa); + ifa_best = (struct in6_ifaddr *)ifa; } ifnet_lock_done(ifp); } @@ -2507,6 +3557,7 @@ in6_ifawithscope( if (ifa_best == NULL) ip6stat.ip6s_sources_none++; else { + IFA_LOCK_SPIN(&ifa_best->ia_ifa); if (oifp == ifa_best->ia_ifp) ip6stat.ip6s_sources_sameif[best_scope]++; else @@ -2519,9 +3570,10 @@ in6_ifawithscope( if ((ifa_best->ia6_flags & IN6_IFF_DEPRECATED) != 0) ip6stat.ip6s_sources_deprecated[best_scope]++; + IFA_UNLOCK(&ifa_best->ia_ifa); } - return(ifa_best); + return (ifa_best); } /* @@ -2529,13 +3581,11 @@ in6_ifawithscope( * found, return the first valid address from designated IF. */ struct in6_ifaddr * -in6_ifawithifp( - struct ifnet *ifp, - struct in6_addr *dst) +in6_ifawithifp(struct ifnet *ifp, struct in6_addr *dst) { int dst_scope = in6_addrscope(dst), blen = -1, tlen; struct ifaddr *ifa; - struct in6_ifaddr *besta = 0; + struct in6_ifaddr *besta = NULL; struct in6_ifaddr *dep[2]; /* last-resort: deprecated */ dep[0] = dep[1] = NULL; @@ -2547,19 +3597,34 @@ in6_ifawithifp( * If none, return one of global addresses assigned other ifs. */ ifnet_lock_shared(ifp); - TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) - { - if (ifa->ifa_addr->sa_family != AF_INET6) + TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) { + IFA_LOCK(ifa); + if (ifa->ifa_addr->sa_family != AF_INET6) { + IFA_UNLOCK(ifa); continue; - if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST) + } + if (ifa2ia6(ifa)->ia6_flags & IN6_IFF_ANYCAST) { + IFA_UNLOCK(ifa); continue; /* XXX: is there any case to allow anycast? */ - if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY) + } + if (ifa2ia6(ifa)->ia6_flags & IN6_IFF_NOTREADY) { + IFA_UNLOCK(ifa); continue; /* don't use this interface */ - if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED) + } + if (ifa2ia6(ifa)->ia6_flags & IN6_IFF_DETACHED) { + IFA_UNLOCK(ifa); continue; - if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) { - if (ip6_use_deprecated) + } + if (ifa2ia6(ifa)->ia6_flags & IN6_IFF_DEPRECATED) { + if (ip6_use_deprecated) { + IFA_ADDREF_LOCKED(ifa); /* for dep[0] */ + IFA_UNLOCK(ifa); + if (dep[0] != NULL) + IFA_REMREF(&dep[0]->ia_ifa); dep[0] = (struct in6_ifaddr *)ifa; + } else { + IFA_UNLOCK(ifa); + } continue; } @@ -2568,81 +3633,119 @@ in6_ifawithifp( * call in6_matchlen() as few as possible */ if (besta) { - if (blen == -1) - blen = in6_matchlen(&besta->ia_addr.sin6_addr, dst); + if (blen == -1) { + IFA_UNLOCK(ifa); + IFA_LOCK(&besta->ia_ifa); + blen = in6_matchlen( + &besta->ia_addr.sin6_addr, dst); + IFA_UNLOCK(&besta->ia_ifa); + IFA_LOCK(ifa); + } tlen = in6_matchlen(IFA_IN6(ifa), dst); if (tlen > blen) { blen = tlen; + IFA_ADDREF_LOCKED(ifa); /* for besta */ + IFA_UNLOCK(ifa); + IFA_REMREF(&besta->ia_ifa); besta = (struct in6_ifaddr *)ifa; + } else { + IFA_UNLOCK(ifa); } - } else + } else { besta = (struct in6_ifaddr *)ifa; + IFA_ADDREF_LOCKED(ifa); /* for besta */ + IFA_UNLOCK(ifa); + } + } else { + IFA_UNLOCK(ifa); } } if (besta) { ifnet_lock_done(ifp); - return(besta); + if (dep[0] != NULL) + IFA_REMREF(&dep[0]->ia_ifa); + return (besta); } - TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) - { - if (ifa->ifa_addr->sa_family != AF_INET6) + TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) { + IFA_LOCK(ifa); + if (ifa->ifa_addr->sa_family != AF_INET6) { + IFA_UNLOCK(ifa); continue; - if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST) + } + if (ifa2ia6(ifa)->ia6_flags & IN6_IFF_ANYCAST) { + IFA_UNLOCK(ifa); continue; /* XXX: is there any case to allow anycast? */ - if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY) + } + if (ifa2ia6(ifa)->ia6_flags & IN6_IFF_NOTREADY) { + IFA_UNLOCK(ifa); continue; /* don't use this interface */ - if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED) + } + if (ifa2ia6(ifa)->ia6_flags & IN6_IFF_DETACHED) { + IFA_UNLOCK(ifa); continue; - if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) { - if (ip6_use_deprecated) + } + if (ifa2ia6(ifa)->ia6_flags & IN6_IFF_DEPRECATED) { + if (ip6_use_deprecated) { + IFA_ADDREF_LOCKED(ifa); /* for dep[1] */ + IFA_UNLOCK(ifa); + if (dep[1] != NULL) + IFA_REMREF(&dep[1]->ia_ifa); dep[1] = (struct in6_ifaddr *)ifa; + } else { + IFA_UNLOCK(ifa); + } continue; } - + IFA_ADDREF_LOCKED(ifa); /* for caller */ + IFA_UNLOCK(ifa); ifnet_lock_done(ifp); - return (struct in6_ifaddr *)ifa; + if (dep[0] != NULL) + IFA_REMREF(&dep[0]->ia_ifa); + if (dep[1] != NULL) + IFA_REMREF(&dep[1]->ia_ifa); + return ((struct in6_ifaddr *)ifa); } ifnet_lock_done(ifp); /* use the last-resort values, that are, deprecated addresses */ - if (dep[0]) - return dep[0]; + if (dep[0]) { + if (dep[1] != NULL) + IFA_REMREF(&dep[1]->ia_ifa); + return (dep[0]); + } if (dep[1]) - return dep[1]; + return (dep[1]); - return NULL; + return (NULL); } /* * perform DAD when interface becomes IFF_UP. */ -void -in6_if_up( - struct ifnet *ifp, - struct in6_aliasreq *ifra) +static void +in6_if_up_dad_start(struct ifnet *ifp) { struct ifaddr *ifa; - struct in6_ifaddr *ia; - int dad_delay; /* delay ticks before DAD output */ - - if (!in6_init2done) - return; - - /* - * special cases, like 6to4, are handled in in6_ifattach - */ - in6_ifattach(ifp, NULL, ifra); - dad_delay = 0; + /* start DAD on all the interface addresses */ ifnet_lock_exclusive(ifp); - TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) - { - if (ifa->ifa_addr->sa_family != AF_INET6) + TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) { + struct in6_ifaddr *ia6; + + IFA_LOCK_SPIN(ifa); + if (ifa->ifa_addr->sa_family != AF_INET6) { + IFA_UNLOCK(ifa); continue; - ia = (struct in6_ifaddr *)ifa; - if (ia->ia6_flags & IN6_IFF_TENTATIVE) - nd6_dad_start(ifa, &dad_delay); + } + ia6 = (struct in6_ifaddr *)ifa; + if (ia6->ia6_flags & IN6_IFF_DADPROGRESS) { + int delay = 0; /* delay ticks before DAD output */ + IFA_UNLOCK(ifa); + nd6_dad_start(ifa, &delay); + } else { + IFA_UNLOCK(ifa); + } } ifnet_lock_done(ifp); } @@ -2652,7 +3755,18 @@ in6if_do_dad( struct ifnet *ifp) { if ((ifp->if_flags & IFF_LOOPBACK) != 0) - return(0); + return (0); + + /* + * If we are using the alternative neighbor discovery + * interface on this interface, then skip DAD. + * + * Also, skip it for interfaces marked "local private" + * for now, even when not marked as using the alternative + * interface. This is for historical reasons. + */ + if (ifp->if_eflags & (IFEF_IPV6_ND6ALT|IFEF_LOCALNET_PRIVATE)) + return (0); switch (ifp->if_type) { #if IFT_DUMMY @@ -2665,7 +3779,7 @@ in6if_do_dad( * interfaces. We should even omit it, because loop-backed * NS would confuse the DAD procedure. */ - return(0); + return (0); default: /* * Our DAD routine requires the interface up and running. @@ -2678,9 +3792,9 @@ in6if_do_dad( */ if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING)) - return(0); + return (0); - return(1); + return (1); } } @@ -2689,22 +3803,96 @@ in6if_do_dad( * to in6_maxmtu. */ void -in6_setmaxmtu() +in6_setmaxmtu(void) { - unsigned long maxmtu = 0; + u_int32_t maxmtu = 0; struct ifnet *ifp; ifnet_head_lock_shared(); TAILQ_FOREACH(ifp, &ifnet_head, if_list) { + struct nd_ifinfo *ndi; + + lck_rw_lock_shared(nd_if_rwlock); + if ((ndi = ND_IFINFO(ifp)) != NULL && !ndi->initialized) + ndi = NULL; + if (ndi != NULL) + lck_mtx_lock(&ndi->lock); if ((ifp->if_flags & IFF_LOOPBACK) == 0 && IN6_LINKMTU(ifp) > maxmtu) maxmtu = IN6_LINKMTU(ifp); + if (ndi != NULL) + lck_mtx_unlock(&ndi->lock); + lck_rw_done(nd_if_rwlock); } ifnet_head_done(); if (maxmtu) /* update only when maxmtu is positive */ in6_maxmtu = maxmtu; } - +/* + * Provide the length of interface identifiers to be used for the link attached + * to the given interface. The length should be defined in "IPv6 over + * xxx-link" document. Note that address architecture might also define + * the length for a particular set of address prefixes, regardless of the + * link type. Also see RFC 4862 for additional background. + */ +int +in6_if2idlen(struct ifnet *ifp) +{ + switch (ifp->if_type) { + case IFT_ETHER: /* RFC2464 */ + case IFT_IEEE8023ADLAG: /* IEEE802.3ad Link Aggregate */ +#ifdef IFT_PROPVIRTUAL + case IFT_PROPVIRTUAL: /* XXX: no RFC. treat it as ether */ +#endif +#ifdef IFT_L2VLAN + case IFT_L2VLAN: /* ditto */ +#endif +#ifdef IFT_IEEE80211 + case IFT_IEEE80211: /* ditto */ +#endif +#ifdef IFT_MIP + case IFT_MIP: /* ditto */ +#endif + return (64); + case IFT_FDDI: /* RFC2467 */ + return (64); + case IFT_ISO88025: /* RFC2470 (IPv6 over Token Ring) */ + return (64); + case IFT_PPP: /* RFC2472 */ + return (64); + case IFT_ARCNET: /* RFC2497 */ + return (64); + case IFT_FRELAY: /* RFC2590 */ + return (64); + case IFT_IEEE1394: /* RFC3146 */ + return (64); + case IFT_GIF: + return (64); /* draft-ietf-v6ops-mech-v2-07 */ + case IFT_LOOP: + return (64); /* XXX: is this really correct? */ + case IFT_OTHER: + return (64); /* for utun interfaces */ + case IFT_CELLULAR: + return (64); /* Packet Data over Cellular */ + case IFT_BRIDGE: + return (64); /* Transparent bridge interface */ + default: + /* + * Unknown link type: + * It might be controversial to use the today's common constant + * of 64 for these cases unconditionally. For full compliance, + * we should return an error in this case. On the other hand, + * if we simply miss the standard for the link type or a new + * standard is defined for a new link type, the IFID length + * is very likely to be the common constant. As a compromise, + * we always use the constant, but make an explicit notice + * indicating the "unknown" case. + */ + log(LOG_NOTICE, "%s: unknown link type (%d)\n", __func__, + ifp->if_type); + return (64); + } +} /* * Convert sockaddr_in6 to sockaddr_in. Original sockaddr_in6 must be * v4 mapped addr or v4 compat addr @@ -2712,25 +3900,30 @@ in6_setmaxmtu() void in6_sin6_2_sin(struct sockaddr_in *sin, struct sockaddr_in6 *sin6) { - bzero(sin, sizeof(*sin)); - sin->sin_len = sizeof(struct sockaddr_in); + bzero(sin, sizeof (*sin)); + sin->sin_len = sizeof (struct sockaddr_in); sin->sin_family = AF_INET; sin->sin_port = sin6->sin6_port; - sin->sin_addr.s_addr = sin6->sin6_addr.s6_addr32[3]; + sin->sin_addr.s_addr = sin6->sin6_addr.s6_addr32[3]; } /* Convert sockaddr_in to sockaddr_in6 in v4 mapped addr format. */ void in6_sin_2_v4mapsin6(struct sockaddr_in *sin, struct sockaddr_in6 *sin6) { - bzero(sin6, sizeof(*sin6)); - sin6->sin6_len = sizeof(struct sockaddr_in6); + bzero(sin6, sizeof (*sin6)); + sin6->sin6_len = sizeof (struct sockaddr_in6); sin6->sin6_family = AF_INET6; sin6->sin6_port = sin->sin_port; sin6->sin6_addr.s6_addr32[0] = 0; sin6->sin6_addr.s6_addr32[1] = 0; - sin6->sin6_addr.s6_addr32[2] = IPV6_ADDR_INT32_SMP; - sin6->sin6_addr.s6_addr32[3] = sin->sin_addr.s_addr; + if (sin->sin_addr.s_addr) { + sin6->sin6_addr.s6_addr32[2] = IPV6_ADDR_INT32_SMP; + sin6->sin6_addr.s6_addr32[3] = sin->sin_addr.s_addr; + } else { + sin6->sin6_addr.s6_addr32[2] = 0; + sin6->sin6_addr.s6_addr32[3] = 0; + } } /* Convert sockaddr_in6 into sockaddr_in. */ @@ -2744,55 +3937,455 @@ in6_sin6_2_sin_in_sock(struct sockaddr *nam) * Save original sockaddr_in6 addr and convert it * to sockaddr_in. */ - sin6 = *(struct sockaddr_in6 *)nam; - sin_p = (struct sockaddr_in *)nam; + sin6 = *(struct sockaddr_in6 *)(void *)nam; + sin_p = (struct sockaddr_in *)(void *)nam; in6_sin6_2_sin(sin_p, &sin6); } /* Convert sockaddr_in into sockaddr_in6 in v4 mapped addr format. */ -void +int in6_sin_2_v4mapsin6_in_sock(struct sockaddr **nam) { struct sockaddr_in *sin_p; struct sockaddr_in6 *sin6_p; - MALLOC(sin6_p, struct sockaddr_in6 *, sizeof *sin6_p, M_SONAME, - M_WAITOK); - sin_p = (struct sockaddr_in *)*nam; + MALLOC(sin6_p, struct sockaddr_in6 *, sizeof (*sin6_p), M_SONAME, + M_WAITOK); + if (sin6_p == NULL) + return (ENOBUFS); + sin_p = (struct sockaddr_in *)(void *)*nam; in6_sin_2_v4mapsin6(sin_p, sin6_p); FREE(*nam, M_SONAME); *nam = (struct sockaddr *)sin6_p; + + return (0); } -/* Posts in6_event_data message kernel events */ +/* + * Posts in6_event_data message kernel events. + * + * To get the same size of kev_in6_data between ILP32 and LP64 data models + * we are using a special version of the in6_addrlifetime structure that + * uses only 32 bits fields to be compatible with Leopard, and that + * are large enough to span 68 years. + */ void -in6_post_msg(struct ifnet *ifp, u_long event_code, struct in6_ifaddr *ifa) +in6_post_msg(struct ifnet *ifp, u_int32_t event_code, struct in6_ifaddr *ifa) { - struct kev_msg ev_msg; - struct kev_in6_data in6_event_data; - - ev_msg.vendor_code = KEV_VENDOR_APPLE; - ev_msg.kev_class = KEV_NETWORK_CLASS; - ev_msg.kev_subclass = KEV_INET6_SUBCLASS; - ev_msg.event_code = event_code; - - in6_event_data.ia_addr = ifa->ia_addr; - in6_event_data.ia_net = ifa->ia_net; - in6_event_data.ia_dstaddr = ifa->ia_dstaddr; - in6_event_data.ia_prefixmask = ifa->ia_prefixmask; - in6_event_data.ia_plen = ifa->ia_plen; - in6_event_data.ia6_flags = (u_int32_t)ifa->ia6_flags; - in6_event_data.ia_lifetime = ifa->ia6_lifetime; + struct kev_msg ev_msg; + struct kev_in6_data in6_event_data; + struct in6_addrlifetime ia6_lt; + + bzero(&in6_event_data, sizeof (struct kev_in6_data)); + bzero(&ev_msg, sizeof (struct kev_msg)); + ev_msg.vendor_code = KEV_VENDOR_APPLE; + ev_msg.kev_class = KEV_NETWORK_CLASS; + ev_msg.kev_subclass = KEV_INET6_SUBCLASS; + ev_msg.event_code = event_code; + + IFA_LOCK(&ifa->ia_ifa); + in6_event_data.ia_addr = ifa->ia_addr; + in6_event_data.ia_net = ifa->ia_net; + in6_event_data.ia_dstaddr = ifa->ia_dstaddr; + in6_event_data.ia_prefixmask = ifa->ia_prefixmask; + in6_event_data.ia_plen = ifa->ia_plen; + in6_event_data.ia6_flags = (u_int32_t)ifa->ia6_flags; + + /* retrieve time as calendar time (last arg is 1) */ + in6ifa_getlifetime(ifa, &ia6_lt, 1); + in6_event_data.ia_lifetime.ia6t_expire = ia6_lt.ia6t_expire; + in6_event_data.ia_lifetime.ia6t_preferred = ia6_lt.ia6t_preferred; + in6_event_data.ia_lifetime.ia6t_vltime = ia6_lt.ia6t_vltime; + in6_event_data.ia_lifetime.ia6t_pltime = ia6_lt.ia6t_pltime; + IFA_UNLOCK(&ifa->ia_ifa); if (ifp != NULL) { - strncpy(&in6_event_data.link_data.if_name[0], ifp->if_name, IFNAMSIZ); + (void) strncpy(&in6_event_data.link_data.if_name[0], + ifp->if_name, IFNAMSIZ); in6_event_data.link_data.if_family = ifp->if_family; - in6_event_data.link_data.if_unit = (unsigned long) ifp->if_unit; + in6_event_data.link_data.if_unit = (u_int32_t)ifp->if_unit; } ev_msg.dv[0].data_ptr = &in6_event_data; - ev_msg.dv[0].data_length = sizeof(struct kev_in6_data); + ev_msg.dv[0].data_length = sizeof (in6_event_data); ev_msg.dv[1].data_length = 0; kev_post_msg(&ev_msg); } + +/* + * Called as part of ip6_init + */ +void +in6_ifaddr_init(void) +{ + in6_cga_init(); + in6_multi_init(); + + PE_parse_boot_argn("ifa_debug", &in6ifa_debug, sizeof (in6ifa_debug)); + + in6ifa_size = (in6ifa_debug == 0) ? sizeof (struct in6_ifaddr) : + sizeof (struct in6_ifaddr_dbg); + + in6ifa_zone = zinit(in6ifa_size, IN6IFA_ZONE_MAX * in6ifa_size, + 0, IN6IFA_ZONE_NAME); + if (in6ifa_zone == NULL) { + panic("%s: failed allocating %s", __func__, IN6IFA_ZONE_NAME); + /* NOTREACHED */ + } + zone_change(in6ifa_zone, Z_EXPAND, TRUE); + zone_change(in6ifa_zone, Z_CALLERACCT, FALSE); + + lck_mtx_init(&in6ifa_trash_lock, ifa_mtx_grp, ifa_mtx_attr); + TAILQ_INIT(&in6ifa_trash_head); +} + +static struct in6_ifaddr * +in6_ifaddr_alloc(int how) +{ + struct in6_ifaddr *in6ifa; + + in6ifa = (how == M_WAITOK) ? zalloc(in6ifa_zone) : + zalloc_noblock(in6ifa_zone); + if (in6ifa != NULL) { + bzero(in6ifa, in6ifa_size); + in6ifa->ia_ifa.ifa_free = in6_ifaddr_free; + in6ifa->ia_ifa.ifa_debug |= IFD_ALLOC; + ifa_lock_init(&in6ifa->ia_ifa); + if (in6ifa_debug != 0) { + struct in6_ifaddr_dbg *in6ifa_dbg = + (struct in6_ifaddr_dbg *)in6ifa; + in6ifa->ia_ifa.ifa_debug |= IFD_DEBUG; + in6ifa->ia_ifa.ifa_trace = in6_ifaddr_trace; + in6ifa->ia_ifa.ifa_attached = in6_ifaddr_attached; + in6ifa->ia_ifa.ifa_detached = in6_ifaddr_detached; + ctrace_record(&in6ifa_dbg->in6ifa_alloc); + } + } + + return (in6ifa); +} + +static void +in6_ifaddr_free(struct ifaddr *ifa) +{ + IFA_LOCK_ASSERT_HELD(ifa); + + if (ifa->ifa_refcnt != 0) { + panic("%s: ifa %p bad ref cnt", __func__, ifa); + /* NOTREACHED */ + } else if (!(ifa->ifa_debug & IFD_ALLOC)) { + panic("%s: ifa %p cannot be freed", __func__, ifa); + /* NOTREACHED */ + } + if (ifa->ifa_debug & IFD_DEBUG) { + struct in6_ifaddr_dbg *in6ifa_dbg = + (struct in6_ifaddr_dbg *)ifa; + ctrace_record(&in6ifa_dbg->in6ifa_free); + bcopy(&in6ifa_dbg->in6ifa, &in6ifa_dbg->in6ifa_old, + sizeof (struct in6_ifaddr)); + if (ifa->ifa_debug & IFD_TRASHED) { + /* Become a regular mutex, just in case */ + IFA_CONVERT_LOCK(ifa); + lck_mtx_lock(&in6ifa_trash_lock); + TAILQ_REMOVE(&in6ifa_trash_head, in6ifa_dbg, + in6ifa_trash_link); + lck_mtx_unlock(&in6ifa_trash_lock); + ifa->ifa_debug &= ~IFD_TRASHED; + } + } + IFA_UNLOCK(ifa); + ifa_lock_destroy(ifa); + bzero(ifa, sizeof (struct in6_ifaddr)); + zfree(in6ifa_zone, ifa); +} + +static void +in6_ifaddr_attached(struct ifaddr *ifa) +{ + struct in6_ifaddr_dbg *in6ifa_dbg = (struct in6_ifaddr_dbg *)ifa; + + IFA_LOCK_ASSERT_HELD(ifa); + + if (!(ifa->ifa_debug & IFD_DEBUG)) { + panic("%s: ifa %p has no debug structure", __func__, ifa); + /* NOTREACHED */ + } + if (ifa->ifa_debug & IFD_TRASHED) { + /* Become a regular mutex, just in case */ + IFA_CONVERT_LOCK(ifa); + lck_mtx_lock(&in6ifa_trash_lock); + TAILQ_REMOVE(&in6ifa_trash_head, in6ifa_dbg, in6ifa_trash_link); + lck_mtx_unlock(&in6ifa_trash_lock); + ifa->ifa_debug &= ~IFD_TRASHED; + } +} + +static void +in6_ifaddr_detached(struct ifaddr *ifa) +{ + struct in6_ifaddr_dbg *in6ifa_dbg = (struct in6_ifaddr_dbg *)ifa; + + IFA_LOCK_ASSERT_HELD(ifa); + + if (!(ifa->ifa_debug & IFD_DEBUG)) { + panic("%s: ifa %p has no debug structure", __func__, ifa); + /* NOTREACHED */ + } else if (ifa->ifa_debug & IFD_TRASHED) { + panic("%s: ifa %p is already in trash list", __func__, ifa); + /* NOTREACHED */ + } + ifa->ifa_debug |= IFD_TRASHED; + /* Become a regular mutex, just in case */ + IFA_CONVERT_LOCK(ifa); + lck_mtx_lock(&in6ifa_trash_lock); + TAILQ_INSERT_TAIL(&in6ifa_trash_head, in6ifa_dbg, in6ifa_trash_link); + lck_mtx_unlock(&in6ifa_trash_lock); +} + +static void +in6_ifaddr_trace(struct ifaddr *ifa, int refhold) +{ + struct in6_ifaddr_dbg *in6ifa_dbg = (struct in6_ifaddr_dbg *)ifa; + ctrace_t *tr; + u_int32_t idx; + u_int16_t *cnt; + + if (!(ifa->ifa_debug & IFD_DEBUG)) { + panic("%s: ifa %p has no debug structure", __func__, ifa); + /* NOTREACHED */ + } + if (refhold) { + cnt = &in6ifa_dbg->in6ifa_refhold_cnt; + tr = in6ifa_dbg->in6ifa_refhold; + } else { + cnt = &in6ifa_dbg->in6ifa_refrele_cnt; + tr = in6ifa_dbg->in6ifa_refrele; + } + + idx = atomic_add_16_ov(cnt, 1) % IN6IFA_TRACE_HIST_SIZE; + ctrace_record(&tr[idx]); +} + +static void +in6_ifaddr_set_dadprogress(struct in6_ifaddr *ia) +{ + uint32_t flags = IN6_IFF_TENTATIVE; + uint32_t optdad = nd6_optimistic_dad; + + if (optdad && (ia->ia_ifp->if_eflags & IFEF_IPV6_ROUTER) == 0) { + if ((optdad & ND6_OPTIMISTIC_DAD_LINKLOCAL) && + IN6_IS_ADDR_LINKLOCAL(&ia->ia_addr.sin6_addr)) + flags = IN6_IFF_OPTIMISTIC; + else if ((optdad & ND6_OPTIMISTIC_DAD_AUTOCONF) && + (ia->ia6_flags & IN6_IFF_AUTOCONF)) { + if (ia->ia6_flags & IN6_IFF_TEMPORARY) { + if (optdad & ND6_OPTIMISTIC_DAD_TEMPORARY) + flags = IN6_IFF_OPTIMISTIC; + } else if (ia->ia6_flags & IN6_IFF_SECURED) { + if (optdad & ND6_OPTIMISTIC_DAD_SECURED) + flags = IN6_IFF_OPTIMISTIC; + } + } else if ((optdad & ND6_OPTIMISTIC_DAD_DYNAMIC) && + (ia->ia6_flags & IN6_IFF_DYNAMIC)) { + if (ia->ia6_flags & IN6_IFF_TEMPORARY) { + if (optdad & ND6_OPTIMISTIC_DAD_TEMPORARY) + flags = IN6_IFF_OPTIMISTIC; + } else { + flags = IN6_IFF_OPTIMISTIC; + } + } + } + + ia->ia6_flags &= ~(IN6_IFF_DUPLICATED | IN6_IFF_DADPROGRESS); + ia->ia6_flags |= flags; +} + +/* + * Handle SIOCGASSOCIDS ioctl for PF_INET6 domain. + */ +static int +in6_getassocids(struct socket *so, uint32_t *cnt, user_addr_t aidp) +{ + struct in6pcb *in6p = sotoin6pcb(so); + associd_t aid; + + if (in6p == NULL || in6p->inp_state == INPCB_STATE_DEAD) + return (EINVAL); + + /* IN6PCB has no concept of association */ + aid = ASSOCID_ANY; + *cnt = 0; + + /* just asking how many there are? */ + if (aidp == USER_ADDR_NULL) + return (0); + + return (copyout(&aid, aidp, sizeof (aid))); +} + +/* + * Handle SIOCGCONNIDS ioctl for PF_INET6 domain. + */ +static int +in6_getconnids(struct socket *so, associd_t aid, uint32_t *cnt, + user_addr_t cidp) +{ + struct in6pcb *in6p = sotoin6pcb(so); + connid_t cid; + + if (in6p == NULL || in6p->inp_state == INPCB_STATE_DEAD) + return (EINVAL); + + if (aid != ASSOCID_ANY && aid != ASSOCID_ALL) + return (EINVAL); + + /* if connected, return 1 connection count */ + *cnt = ((so->so_state & SS_ISCONNECTED) ? 1 : 0); + + /* just asking how many there are? */ + if (cidp == USER_ADDR_NULL) + return (0); + + /* if IN6PCB is connected, assign it connid 1 */ + cid = ((*cnt != 0) ? 1 : CONNID_ANY); + + return (copyout(&cid, cidp, sizeof (cid))); +} + +/* + * Handle SIOCGCONNINFO ioctl for PF_INET6 domain. + */ +static int +in6_getconninfo(struct socket *so, connid_t cid, uint32_t *flags, + uint32_t *ifindex, int32_t *soerror, user_addr_t src, socklen_t *src_len, + user_addr_t dst, socklen_t *dst_len, uint32_t *aux_type, + user_addr_t aux_data, uint32_t *aux_len) +{ +#pragma unused(aux_data) + struct in6pcb *in6p = sotoin6pcb(so); + struct sockaddr_in6 sin6; + struct ifnet *ifp = NULL; + int error = 0; + u_int32_t copy_len = 0; + + /* + * Don't test for INPCB_STATE_DEAD since this may be called + * after SOF_PCBCLEARING is set, e.g. after tcp_close(). + */ + if (in6p == NULL) { + error = EINVAL; + goto out; + } + + if (cid != CONNID_ANY && cid != CONNID_ALL && cid != 1) { + error = EINVAL; + goto out; + } + + ifp = in6p->in6p_last_outifp; + *ifindex = ((ifp != NULL) ? ifp->if_index : 0); + *soerror = so->so_error; + *flags = 0; + if (so->so_state & SS_ISCONNECTED) + *flags |= (CIF_CONNECTED | CIF_PREFERRED); + if (in6p->in6p_flags & INP_BOUND_IF) + *flags |= CIF_BOUND_IF; + if (!(in6p->in6p_flags & INP_IN6ADDR_ANY)) + *flags |= CIF_BOUND_IP; + if (!(in6p->in6p_flags & INP_ANONPORT)) + *flags |= CIF_BOUND_PORT; + + bzero(&sin6, sizeof (sin6)); + sin6.sin6_len = sizeof (sin6); + sin6.sin6_family = AF_INET6; + + /* source address and port */ + sin6.sin6_port = in6p->in6p_lport; + bcopy(&in6p->in6p_laddr, &sin6.sin6_addr, sizeof (struct in6_addr)); + if (*src_len == 0) { + *src_len = sin6.sin6_len; + } else { + if (src != USER_ADDR_NULL) { + copy_len = min(*src_len, sizeof (sin6)); + error = copyout(&sin6, src, copy_len); + if (error != 0) + goto out; + *src_len = copy_len; + } + } + + /* destination address and port */ + sin6.sin6_port = in6p->in6p_fport; + bcopy(&in6p->in6p_faddr, &sin6.sin6_addr, sizeof (struct in6_addr)); + if (*dst_len == 0) { + *dst_len = sin6.sin6_len; + } else { + if (dst != USER_ADDR_NULL) { + copy_len = min(*dst_len, sizeof (sin6)); + error = copyout(&sin6, dst, copy_len); + if (error != 0) + goto out; + *dst_len = copy_len; + } + } + + *aux_type = 0; + *aux_len = 0; + if (SOCK_PROTO(so) == IPPROTO_TCP) { + struct conninfo_tcp tcp_ci; + + *aux_type = CIAUX_TCP; + if (*aux_len == 0) { + *aux_len = sizeof (tcp_ci); + } else { + if (aux_data != USER_ADDR_NULL) { + copy_len = min(*aux_len, sizeof (tcp_ci)); + bzero(&tcp_ci, sizeof (tcp_ci)); + tcp_getconninfo(so, &tcp_ci); + error = copyout(&tcp_ci, aux_data, copy_len); + if (error != 0) + goto out; + *aux_len = copy_len; + } + } + } + +out: + return (error); +} + +/* + * 'u' group ioctls. + * + * The switch statement below does nothing at runtime, as it serves as a + * compile time check to ensure that all of the socket 'u' ioctls (those + * in the 'u' group going thru soo_ioctl) that are made available by the + * networking stack is unique. This works as long as this routine gets + * updated each time a new interface ioctl gets added. + * + * Any failures at compile time indicates duplicated ioctl values. + */ +static __attribute__((unused)) void +in6ioctl_cassert(void) +{ + /* + * This is equivalent to _CASSERT() and the compiler wouldn't + * generate any instructions, thus for compile time only. + */ + switch ((u_long)0) { + case 0: + + /* bsd/netinet6/in6_var.h */ + case SIOCGETSGCNT_IN6: + case SIOCGETMIFCNT_IN6_32: + case SIOCGETMIFCNT_IN6_64: + case SIOCAADDRCTL_POLICY: + case SIOCDADDRCTL_POLICY: + case SIOCDRADD_IN6_32: + case SIOCDRADD_IN6_64: + case SIOCDRDEL_IN6_32: + case SIOCDRDEL_IN6_64: + ; + } +}