/*
- * Copyright (c) 2000-2013 Apple Inc. All rights reserved.
+ * Copyright (c) 2000-2018 Apple Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
* Version 2.0.
*/
-#define _IP_VHL
+#define _IP_VHL
#include <sys/param.h>
#include <sys/systm.h>
#include <net/ntstat.h>
#include <net/dlil.h>
#include <net/classq/classq.h>
+#include <net/net_perf.h>
+#include <net/init.h>
#if PF
#include <net/pfvar.h>
#endif /* PF */
#include <netkey/key.h>
#endif /* IPSEC */
-#define DBG_LAYER_BEG NETDBG_CODE(DBG_NETIP, 0)
-#define DBG_LAYER_END NETDBG_CODE(DBG_NETIP, 2)
-#define DBG_FNC_IP_INPUT NETDBG_CODE(DBG_NETIP, (2 << 8))
+#define DBG_LAYER_BEG NETDBG_CODE(DBG_NETIP, 0)
+#define DBG_LAYER_END NETDBG_CODE(DBG_NETIP, 2)
+#define DBG_FNC_IP_INPUT NETDBG_CODE(DBG_NETIP, (2 << 8))
#if IPSEC
extern int ipsec_bypass;
extern lck_mtx_t *sadb_mutex;
-lck_grp_t *sadb_stat_mutex_grp;
-lck_grp_attr_t *sadb_stat_mutex_grp_attr;
-lck_attr_t *sadb_stat_mutex_attr;
+lck_grp_t *sadb_stat_mutex_grp;
+lck_grp_attr_t *sadb_stat_mutex_grp_attr;
+lck_attr_t *sadb_stat_mutex_attr;
decl_lck_mtx_data(, sadb_stat_mutex_data);
-lck_mtx_t *sadb_stat_mutex = &sadb_stat_mutex_data;
+lck_mtx_t *sadb_stat_mutex = &sadb_stat_mutex_data;
#endif /* IPSEC */
-#if MROUTING
-int rsvp_on = 0;
-static int ip_rsvp_on;
-struct socket *ip_rsvpd;
-#endif /* MROUTING */
-
MBUFQ_HEAD(fq_head);
-static int frag_timeout_run; /* frag timer is scheduled to run */
+static int frag_timeout_run; /* frag timer is scheduled to run */
static void frag_timeout(void *);
static void frag_sched_timeout(void);
static struct ipq *ipq_alloc(int);
static void ipq_free(struct ipq *);
static void ipq_updateparams(void);
+static void ip_input_second_pass(struct mbuf *, struct ifnet *,
+ u_int32_t, int, int, struct ip_fw_in_args *, int);
decl_lck_mtx_data(static, ipqlock);
-static lck_attr_t *ipqlock_attr;
-static lck_grp_t *ipqlock_grp;
-static lck_grp_attr_t *ipqlock_grp_attr;
+static lck_attr_t *ipqlock_attr;
+static lck_grp_t *ipqlock_grp;
+static lck_grp_attr_t *ipqlock_grp_attr;
/* Packet reassembly stuff */
-#define IPREASS_NHASH_LOG2 6
-#define IPREASS_NHASH (1 << IPREASS_NHASH_LOG2)
-#define IPREASS_HMASK (IPREASS_NHASH - 1)
-#define IPREASS_HASH(x, y) \
+#define IPREASS_NHASH_LOG2 6
+#define IPREASS_NHASH (1 << IPREASS_NHASH_LOG2)
+#define IPREASS_HMASK (IPREASS_NHASH - 1)
+#define IPREASS_HASH(x, y) \
(((((x) & 0xF) | ((((x) >> 8) & 0xF) << 4)) ^ (y)) & IPREASS_HMASK)
/* IP fragment reassembly queues (protected by ipqlock) */
static TAILQ_HEAD(ipqhead, ipq) ipq[IPREASS_NHASH]; /* ip reassembly queues */
-static int maxnipq; /* max packets in reass queues */
-static u_int32_t maxfragsperpacket; /* max frags/packet in reass queues */
-static u_int32_t nipq; /* # of packets in reass queues */
-static u_int32_t ipq_limit; /* ipq allocation limit */
-static u_int32_t ipq_count; /* current # of allocated ipq's */
+static int maxnipq; /* max packets in reass queues */
+static u_int32_t maxfragsperpacket; /* max frags/packet in reass queues */
+static u_int32_t nipq; /* # of packets in reass queues */
+static u_int32_t ipq_limit; /* ipq allocation limit */
+static u_int32_t ipq_count; /* current # of allocated ipq's */
static int sysctl_ipforwarding SYSCTL_HANDLER_ARGS;
static int sysctl_maxnipq SYSCTL_HANDLER_ARGS;
static int sysctl_maxfragsperpacket SYSCTL_HANDLER_ARGS;
+#if (DEBUG || DEVELOPMENT)
+static int sysctl_reset_ip_input_stats SYSCTL_HANDLER_ARGS;
+static int sysctl_ip_input_measure_bins SYSCTL_HANDLER_ARGS;
+static int sysctl_ip_input_getperf SYSCTL_HANDLER_ARGS;
+#endif /* (DEBUG || DEVELOPMENT) */
+
int ipforwarding = 0;
SYSCTL_PROC(_net_inet_ip, IPCTL_FORWARDING, forwarding,
- CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_LOCKED, &ipforwarding, 0,
- sysctl_ipforwarding, "I", "Enable IP forwarding between interfaces");
+ CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_LOCKED, &ipforwarding, 0,
+ sysctl_ipforwarding, "I", "Enable IP forwarding between interfaces");
static int ipsendredirects = 1; /* XXX */
SYSCTL_INT(_net_inet_ip, IPCTL_SENDREDIRECTS, redirect,
- CTLFLAG_RW | CTLFLAG_LOCKED, &ipsendredirects, 0,
- "Enable sending IP redirects");
+ CTLFLAG_RW | CTLFLAG_LOCKED, &ipsendredirects, 0,
+ "Enable sending IP redirects");
int ip_defttl = IPDEFTTL;
SYSCTL_INT(_net_inet_ip, IPCTL_DEFTTL, ttl, CTLFLAG_RW | CTLFLAG_LOCKED,
- &ip_defttl, 0, "Maximum TTL on IP packets");
+ &ip_defttl, 0, "Maximum TTL on IP packets");
static int ip_dosourceroute = 0;
SYSCTL_INT(_net_inet_ip, IPCTL_SOURCEROUTE, sourceroute,
- CTLFLAG_RW | CTLFLAG_LOCKED, &ip_dosourceroute, 0,
- "Enable forwarding source routed IP packets");
+ CTLFLAG_RW | CTLFLAG_LOCKED, &ip_dosourceroute, 0,
+ "Enable forwarding source routed IP packets");
static int ip_acceptsourceroute = 0;
SYSCTL_INT(_net_inet_ip, IPCTL_ACCEPTSOURCEROUTE, accept_sourceroute,
- CTLFLAG_RW | CTLFLAG_LOCKED, &ip_acceptsourceroute, 0,
- "Enable accepting source routed IP packets");
+ CTLFLAG_RW | CTLFLAG_LOCKED, &ip_acceptsourceroute, 0,
+ "Enable accepting source routed IP packets");
static int ip_sendsourcequench = 0;
SYSCTL_INT(_net_inet_ip, OID_AUTO, sendsourcequench,
- CTLFLAG_RW | CTLFLAG_LOCKED, &ip_sendsourcequench, 0,
- "Enable the transmission of source quench packets");
+ CTLFLAG_RW | CTLFLAG_LOCKED, &ip_sendsourcequench, 0,
+ "Enable the transmission of source quench packets");
SYSCTL_PROC(_net_inet_ip, OID_AUTO, maxfragpackets,
- CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_LOCKED, &maxnipq, 0, sysctl_maxnipq,
- "I", "Maximum number of IPv4 fragment reassembly queue entries");
+ CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_LOCKED, &maxnipq, 0, sysctl_maxnipq,
+ "I", "Maximum number of IPv4 fragment reassembly queue entries");
SYSCTL_UINT(_net_inet_ip, OID_AUTO, fragpackets, CTLFLAG_RD | CTLFLAG_LOCKED,
- &nipq, 0, "Current number of IPv4 fragment reassembly queue entries");
+ &nipq, 0, "Current number of IPv4 fragment reassembly queue entries");
SYSCTL_PROC(_net_inet_ip, OID_AUTO, maxfragsperpacket,
- CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_LOCKED, &maxfragsperpacket, 0,
- sysctl_maxfragsperpacket, "I",
- "Maximum number of IPv4 fragments allowed per packet");
-
-int ip_doscopedroute = 1;
-SYSCTL_INT(_net_inet_ip, OID_AUTO, scopedroute, CTLFLAG_RD | CTLFLAG_LOCKED,
- &ip_doscopedroute, 0, "Enable IPv4 scoped routing");
+ CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_LOCKED, &maxfragsperpacket, 0,
+ sysctl_maxfragsperpacket, "I",
+ "Maximum number of IPv4 fragments allowed per packet");
static uint32_t ip_adj_clear_hwcksum = 0;
SYSCTL_UINT(_net_inet_ip, OID_AUTO, adj_clear_hwcksum,
- CTLFLAG_RW | CTLFLAG_LOCKED, &ip_adj_clear_hwcksum, 0,
- "Invalidate hwcksum info when adjusting length");
+ CTLFLAG_RW | CTLFLAG_LOCKED, &ip_adj_clear_hwcksum, 0,
+ "Invalidate hwcksum info when adjusting length");
+
+static uint32_t ip_adj_partial_sum = 1;
+SYSCTL_UINT(_net_inet_ip, OID_AUTO, adj_partial_sum,
+ CTLFLAG_RW | CTLFLAG_LOCKED, &ip_adj_partial_sum, 0,
+ "Perform partial sum adjustment of trailing bytes at IP layer");
/*
* XXX - Setting ip_checkinterface mostly implements the receive side of
*/
static int ip_checkinterface = 0;
SYSCTL_INT(_net_inet_ip, OID_AUTO, check_interface, CTLFLAG_RW | CTLFLAG_LOCKED,
- &ip_checkinterface, 0, "Verify packet arrives on correct interface");
+ &ip_checkinterface, 0, "Verify packet arrives on correct interface");
+
+static int ip_chaining = 1;
+SYSCTL_INT(_net_inet_ip, OID_AUTO, rx_chaining, CTLFLAG_RW | CTLFLAG_LOCKED,
+ &ip_chaining, 1, "Do receive side ip address based chaining");
+
+static int ip_chainsz = 6;
+SYSCTL_INT(_net_inet_ip, OID_AUTO, rx_chainsz, CTLFLAG_RW | CTLFLAG_LOCKED,
+ &ip_chainsz, 1, "IP receive side max chaining");
+
+#if (DEBUG || DEVELOPMENT)
+static int ip_input_measure = 0;
+SYSCTL_PROC(_net_inet_ip, OID_AUTO, input_perf,
+ CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_LOCKED,
+ &ip_input_measure, 0, sysctl_reset_ip_input_stats, "I", "Do time measurement");
+
+static uint64_t ip_input_measure_bins = 0;
+SYSCTL_PROC(_net_inet_ip, OID_AUTO, input_perf_bins,
+ CTLTYPE_QUAD | CTLFLAG_RW | CTLFLAG_LOCKED, &ip_input_measure_bins, 0,
+ sysctl_ip_input_measure_bins, "I",
+ "bins for chaining performance data histogram");
+
+static net_perf_t net_perf;
+SYSCTL_PROC(_net_inet_ip, OID_AUTO, input_perf_data,
+ CTLTYPE_STRUCT | CTLFLAG_RD | CTLFLAG_LOCKED,
+ 0, 0, sysctl_ip_input_getperf, "S,net_perf",
+ "IP input performance data (struct net_perf, net/net_perf.h)");
+#endif /* (DEBUG || DEVELOPMENT) */
#if DIAGNOSTIC
static int ipprintfs = 0;
struct protosw *ip_protox[IPPROTO_MAX];
-static lck_grp_attr_t *in_ifaddr_rwlock_grp_attr;
-static lck_grp_t *in_ifaddr_rwlock_grp;
-static lck_attr_t *in_ifaddr_rwlock_attr;
+static lck_grp_attr_t *in_ifaddr_rwlock_grp_attr;
+static lck_grp_t *in_ifaddr_rwlock_grp;
+static lck_attr_t *in_ifaddr_rwlock_attr;
decl_lck_rw_data(, in_ifaddr_rwlock_data);
-lck_rw_t *in_ifaddr_rwlock = &in_ifaddr_rwlock_data;
+lck_rw_t *in_ifaddr_rwlock = &in_ifaddr_rwlock_data;
/* Protected by in_ifaddr_rwlock */
-struct in_ifaddrhead in_ifaddrhead; /* first inet address */
-struct in_ifaddrhashhead *in_ifaddrhashtbl; /* inet addr hash table */
+struct in_ifaddrhead in_ifaddrhead; /* first inet address */
+struct in_ifaddrhashhead *in_ifaddrhashtbl; /* inet addr hash table */
-#define INADDR_NHASH 61
-static u_int32_t inaddr_nhash; /* hash table size */
-static u_int32_t inaddr_hashp; /* next largest prime */
+#define INADDR_NHASH 61
+static u_int32_t inaddr_nhash; /* hash table size */
+static u_int32_t inaddr_hashp; /* next largest prime */
static int ip_getstat SYSCTL_HANDLER_ARGS;
struct ipstat ipstat;
-SYSCTL_PROC(_net_inet_ip, IPCTL_STATS, stats, CTLFLAG_RD | CTLFLAG_LOCKED,
- 0, 0, ip_getstat, "S,ipstat",
- "IP statistics (struct ipstat, netinet/ip_var.h)");
+SYSCTL_PROC(_net_inet_ip, IPCTL_STATS, stats,
+ CTLTYPE_STRUCT | CTLFLAG_RD | CTLFLAG_LOCKED,
+ 0, 0, ip_getstat, "S,ipstat",
+ "IP statistics (struct ipstat, netinet/ip_var.h)");
#if IPCTL_DEFMTU
SYSCTL_INT(_net_inet_ip, IPCTL_DEFMTU, mtu, CTLFLAG_RW | CTLFLAG_LOCKED,
- &ip_mtu, 0, "Default MTU");
+ &ip_mtu, 0, "Default MTU");
#endif /* IPCTL_DEFMTU */
#if IPSTEALTH
-static int ipstealth = 0;
+static int ipstealth = 0;
SYSCTL_INT(_net_inet_ip, OID_AUTO, stealth, CTLFLAG_RW | CTLFLAG_LOCKED,
- &ipstealth, 0, "");
+ &ipstealth, 0, "");
#endif /* IPSTEALTH */
/* Firewall hooks */
#endif /* DUMMYNET */
SYSCTL_NODE(_net_inet_ip, OID_AUTO, linklocal,
- CTLFLAG_RW | CTLFLAG_LOCKED, 0, "link local");
+ CTLFLAG_RW | CTLFLAG_LOCKED, 0, "link local");
struct ip_linklocal_stat ip_linklocal_stat;
SYSCTL_STRUCT(_net_inet_ip_linklocal, OID_AUTO, stat,
- CTLFLAG_RD | CTLFLAG_LOCKED, &ip_linklocal_stat, ip_linklocal_stat,
- "Number of link local packets with TTL less than 255");
+ CTLFLAG_RD | CTLFLAG_LOCKED, &ip_linklocal_stat, ip_linklocal_stat,
+ "Number of link local packets with TTL less than 255");
SYSCTL_NODE(_net_inet_ip_linklocal, OID_AUTO, in,
- CTLFLAG_RW | CTLFLAG_LOCKED, 0, "link local input");
+ CTLFLAG_RW | CTLFLAG_LOCKED, 0, "link local input");
int ip_linklocal_in_allowbadttl = 1;
SYSCTL_INT(_net_inet_ip_linklocal_in, OID_AUTO, allowbadttl,
- CTLFLAG_RW | CTLFLAG_LOCKED, &ip_linklocal_in_allowbadttl, 0,
- "Allow incoming link local packets with TTL less than 255");
+ CTLFLAG_RW | CTLFLAG_LOCKED, &ip_linklocal_in_allowbadttl, 0,
+ "Allow incoming link local packets with TTL less than 255");
/*
* maintenance when the remote end is on a network that is not known
* to us.
*/
-static int ip_nhops = 0;
-static struct ip_srcrt {
- struct in_addr dst; /* final destination */
- char nop; /* one NOP to align */
- char srcopt[IPOPT_OFFSET + 1]; /* OPTVAL, OLEN and OFFSET */
- struct in_addr route[MAX_IPOPTLEN / sizeof (struct in_addr)];
+static int ip_nhops = 0;
+static struct ip_srcrt {
+ struct in_addr dst; /* final destination */
+ char nop; /* one NOP to align */
+ char srcopt[IPOPT_OFFSET + 1]; /* OPTVAL, OLEN and OFFSET */
+ struct in_addr route[MAX_IPOPTLEN / sizeof(struct in_addr)];
} ip_srcrt;
static void in_ifaddrhashtbl_init(void);
int ip_use_randomid = 1;
SYSCTL_INT(_net_inet_ip, OID_AUTO, random_id, CTLFLAG_RW | CTLFLAG_LOCKED,
- &ip_use_randomid, 0, "Randomize IP packets IDs");
+ &ip_use_randomid, 0, "Randomize IP packets IDs");
/*
* On platforms which require strict alignment (currently for anything but
* it's needed later on.
*/
#if defined(__i386__) || defined(__x86_64__)
-#define IP_HDR_ALIGNMENT_FIXUP(_m, _ifp, _action) do { } while (0)
+#define IP_HDR_ALIGNMENT_FIXUP(_m, _ifp, _action) do { } while (0)
#else /* !__i386__ && !__x86_64__ */
-#define IP_HDR_ALIGNMENT_FIXUP(_m, _ifp, _action) do { \
- if (!IP_HDR_ALIGNED_P(mtod(_m, caddr_t))) { \
- struct mbuf *_n; \
- struct ifnet *__ifp = (_ifp); \
- atomic_add_64(&(__ifp)->if_alignerrs, 1); \
- if (((_m)->m_flags & M_PKTHDR) && \
- (_m)->m_pkthdr.pkt_hdr != NULL) \
- (_m)->m_pkthdr.pkt_hdr = NULL; \
- _n = m_defrag_offset(_m, max_linkhdr, M_NOWAIT); \
- if (_n == NULL) { \
- atomic_add_32(&ipstat.ips_toosmall, 1); \
- m_freem(_m); \
- (_m) = NULL; \
- _action; \
- } else { \
- VERIFY(_n != (_m)); \
- (_m) = _n; \
- } \
- } \
+#define IP_HDR_ALIGNMENT_FIXUP(_m, _ifp, _action) do { \
+ if (!IP_HDR_ALIGNED_P(mtod(_m, caddr_t))) { \
+ struct mbuf *_n; \
+ struct ifnet *__ifp = (_ifp); \
+ atomic_add_64(&(__ifp)->if_alignerrs, 1); \
+ if (((_m)->m_flags & M_PKTHDR) && \
+ (_m)->m_pkthdr.pkt_hdr != NULL) \
+ (_m)->m_pkthdr.pkt_hdr = NULL; \
+ _n = m_defrag_offset(_m, max_linkhdr, M_NOWAIT); \
+ if (_n == NULL) { \
+ atomic_add_32(&ipstat.ips_toosmall, 1); \
+ m_freem(_m); \
+ (_m) = NULL; \
+ _action; \
+ } else { \
+ VERIFY(_n != (_m)); \
+ (_m) = _n; \
+ } \
+ } \
} while (0)
#endif /* !__i386__ && !__x86_64__ */
*/
static gre_input_func_t gre_input_func;
+static void
+ip_init_delayed(void)
+{
+ struct ifreq ifr;
+ int error;
+ struct sockaddr_in *sin;
+
+ bzero(&ifr, sizeof(ifr));
+ strlcpy(ifr.ifr_name, "lo0", sizeof(ifr.ifr_name));
+ sin = (struct sockaddr_in *)(void *)&ifr.ifr_addr;
+ sin->sin_len = sizeof(struct sockaddr_in);
+ sin->sin_family = AF_INET;
+ sin->sin_addr.s_addr = htonl(INADDR_LOOPBACK);
+ error = in_control(NULL, SIOCSIFADDR, (caddr_t)&ifr, lo_ifp, kernproc);
+ if (error) {
+ printf("%s: failed to initialise lo0's address, error=%d\n",
+ __func__, error);
+ }
+}
+
/*
* IP initialization: fill in IP protocol switch table.
* All protocols not implemented in kernel go to raw IP protocol handler.
int i;
domain_proto_mtx_lock_assert_held();
- VERIFY((pp->pr_flags & (PR_INITIALIZED|PR_ATTACHED)) == PR_ATTACHED);
+ VERIFY((pp->pr_flags & (PR_INITIALIZED | PR_ATTACHED)) == PR_ATTACHED);
/* ipq_alloc() uses mbufs for IP fragment queue structures */
- _CASSERT(sizeof (struct ipq) <= _MLEN);
+ _CASSERT(sizeof(struct ipq) <= _MLEN);
/*
* Some ioctls (e.g. SIOCAIFADDR) use ifaliasreq struct, which is
* interchangeable with in_aliasreq; they must have the same size.
*/
- _CASSERT(sizeof (struct ifaliasreq) == sizeof (struct in_aliasreq));
+ _CASSERT(sizeof(struct ifaliasreq) == sizeof(struct in_aliasreq));
- if (ip_initialized)
+ if (ip_initialized) {
return;
+ }
ip_initialized = 1;
- PE_parse_boot_argn("net.inet.ip.scopedroute",
- &ip_doscopedroute, sizeof (ip_doscopedroute));
-
in_ifaddr_init();
in_ifaddr_rwlock_grp_attr = lck_grp_attr_alloc_init();
}
/* Initialize the entire ip_protox[] array to IPPROTO_RAW. */
- for (i = 0; i < IPPROTO_MAX; i++)
+ for (i = 0; i < IPPROTO_MAX; i++) {
ip_protox[i] = pr;
+ }
/*
* Cycle through IP protocols and put them into the appropriate place
* in ip_protox[], skipping protocols IPPROTO_{IP,RAW}.
VERIFY(pr->pr_domain == dp);
if (pr->pr_protocol != 0 && pr->pr_protocol != IPPROTO_RAW) {
/* Be careful to only index valid IP protocols. */
- if (pr->pr_protocol < IPPROTO_MAX)
+ if (pr->pr_protocol < IPPROTO_MAX) {
ip_protox[pr->pr_protocol] = pr;
+ }
}
}
lck_mtx_lock(&ipqlock);
/* Initialize IP reassembly queue. */
- for (i = 0; i < IPREASS_NHASH; i++)
+ for (i = 0; i < IPREASS_NHASH; i++) {
TAILQ_INIT(&ipq[i]);
+ }
maxnipq = nmbclusters / 32;
maxfragsperpacket = 128; /* enough for 64k in 512 byte fragments */
#endif
arp_init();
+ net_init_add(ip_init_delayed);
}
/*
{
int i, k, p;
- if (in_ifaddrhashtbl != NULL)
+ if (in_ifaddrhashtbl != NULL) {
return;
+ }
PE_parse_boot_argn("inaddr_nhash", &inaddr_nhash,
- sizeof (inaddr_nhash));
- if (inaddr_nhash == 0)
+ sizeof(inaddr_nhash));
+ if (inaddr_nhash == 0) {
inaddr_nhash = INADDR_NHASH;
+ }
MALLOC(in_ifaddrhashtbl, struct in_ifaddrhashhead *,
- inaddr_nhash * sizeof (*in_ifaddrhashtbl),
+ inaddr_nhash * sizeof(*in_ifaddrhashtbl),
M_IFADDR, M_WAITOK | M_ZERO);
- if (in_ifaddrhashtbl == NULL)
+ if (in_ifaddrhashtbl == NULL) {
panic("in_ifaddrhashtbl_init allocation failed");
+ }
/*
* Generate the next largest prime greater than inaddr_nhash.
for (;;) {
p = 1;
for (i = 3; i * i <= k; i += 2) {
- if (k % i == 0)
+ if (k % i == 0) {
p = 0;
+ }
}
- if (p == 1)
+ if (p == 1) {
break;
+ }
k += 2;
}
inaddr_hashp = k;
* the hash size, as documented in "Introduction to Algorithms"
* (Cormen, Leiserson, Rivest).
*/
- if (inaddr_nhash > 1)
- return ((key * inaddr_hashp) % inaddr_nhash);
- else
- return (0);
+ if (inaddr_nhash > 1) {
+ return (key * inaddr_hashp) % inaddr_nhash;
+ } else {
+ return 0;
+ }
}
void
{
struct ipfilter *filter;
int seen = (inject_ipfref == NULL);
- int changed_header = 0;
+ int changed_header = 0;
struct ip *ip;
void (*pr_input)(struct mbuf *, int len);
ipf_ref();
TAILQ_FOREACH(filter, &ipv4_filters, ipf_link) {
if (seen == 0) {
- if ((struct ipfilter *)inject_ipfref == filter)
+ if ((struct ipfilter *)inject_ipfref == filter) {
seen = 1;
+ }
} else if (filter->ipf_filter.ipf_input) {
errno_t result;
m->m_pkthdr.rcvif, ipf_unref());
/* ipf_unref() already called */
- if (m == NULL)
+ if (m == NULL) {
return;
+ }
changed_header = 1;
ip = mtod(m, struct ip *);
ip->ip_sum = ip_cksum_hdr_in(m, hlen);
}
result = filter->ipf_filter.ipf_input(
- filter->ipf_filter.cookie, (mbuf_t *)&m,
- hlen, proto);
+ filter->ipf_filter.cookie, (mbuf_t *)&m,
+ hlen, proto);
if (result == EJUSTRETURN) {
ipf_unref();
return;
}
}
}
- ipf_unref();
+ ipf_unref();
+ }
+
+ /* Perform IP header alignment fixup (post-filters), if needed */
+ IP_HDR_ALIGNMENT_FIXUP(m, m->m_pkthdr.rcvif, return );
+
+ /*
+ * If there isn't a specific lock for the protocol
+ * we're about to call, use the generic lock for AF_INET.
+ * otherwise let the protocol deal with its own locking
+ */
+ ip = mtod(m, struct ip *);
+
+ if (changed_header) {
+ ip->ip_len = ntohs(ip->ip_len) - hlen;
+ ip->ip_off = ntohs(ip->ip_off);
+ }
+
+ if ((pr_input = ip_protox[ip->ip_p]->pr_input) == NULL) {
+ m_freem(m);
+ } else if (!(ip_protox[ip->ip_p]->pr_flags & PR_PROTOLOCK)) {
+ lck_mtx_lock(inet_domain_mutex);
+ pr_input(m, hlen);
+ lck_mtx_unlock(inet_domain_mutex);
+ } else {
+ pr_input(m, hlen);
+ }
+}
+
+struct pktchain_elm {
+ struct mbuf *pkte_head;
+ struct mbuf *pkte_tail;
+ struct in_addr pkte_saddr;
+ struct in_addr pkte_daddr;
+ uint16_t pkte_npkts;
+ uint16_t pkte_proto;
+ uint32_t pkte_nbytes;
+};
+
+typedef struct pktchain_elm pktchain_elm_t;
+
+/* Store upto PKTTBL_SZ unique flows on the stack */
+#define PKTTBL_SZ 7
+
+static struct mbuf *
+ip_chain_insert(struct mbuf *packet, pktchain_elm_t *tbl)
+{
+ struct ip* ip;
+ int pkttbl_idx = 0;
+
+ ip = mtod(packet, struct ip*);
+
+ /* reusing the hash function from inaddr_hashval */
+ pkttbl_idx = inaddr_hashval(ntohs(ip->ip_src.s_addr)) % PKTTBL_SZ;
+ if (tbl[pkttbl_idx].pkte_head == NULL) {
+ tbl[pkttbl_idx].pkte_head = packet;
+ tbl[pkttbl_idx].pkte_saddr.s_addr = ip->ip_src.s_addr;
+ tbl[pkttbl_idx].pkte_daddr.s_addr = ip->ip_dst.s_addr;
+ tbl[pkttbl_idx].pkte_proto = ip->ip_p;
+ } else {
+ if ((ip->ip_dst.s_addr == tbl[pkttbl_idx].pkte_daddr.s_addr) &&
+ (ip->ip_src.s_addr == tbl[pkttbl_idx].pkte_saddr.s_addr) &&
+ (ip->ip_p == tbl[pkttbl_idx].pkte_proto)) {
+ } else {
+ return packet;
+ }
+ }
+ if (tbl[pkttbl_idx].pkte_tail != NULL) {
+ mbuf_setnextpkt(tbl[pkttbl_idx].pkte_tail, packet);
+ }
+
+ tbl[pkttbl_idx].pkte_tail = packet;
+ tbl[pkttbl_idx].pkte_npkts += 1;
+ tbl[pkttbl_idx].pkte_nbytes += packet->m_pkthdr.len;
+ return NULL;
+}
+
+/* args is a dummy variable here for backward compatibility */
+static void
+ip_input_second_pass_loop_tbl(pktchain_elm_t *tbl, struct ip_fw_in_args *args)
+{
+ int i = 0;
+
+ for (i = 0; i < PKTTBL_SZ; i++) {
+ if (tbl[i].pkte_head != NULL) {
+ struct mbuf *m = tbl[i].pkte_head;
+ ip_input_second_pass(m, m->m_pkthdr.rcvif, 0,
+ tbl[i].pkte_npkts, tbl[i].pkte_nbytes, args, 0);
+
+ if (tbl[i].pkte_npkts > 2) {
+ ipstat.ips_rxc_chainsz_gt2++;
+ }
+ if (tbl[i].pkte_npkts > 4) {
+ ipstat.ips_rxc_chainsz_gt4++;
+ }
+#if (DEBUG || DEVELOPMENT)
+ if (ip_input_measure) {
+ net_perf_histogram(&net_perf, tbl[i].pkte_npkts);
+ }
+#endif /* (DEBUG || DEVELOPMENT) */
+ tbl[i].pkte_head = tbl[i].pkte_tail = NULL;
+ tbl[i].pkte_npkts = 0;
+ tbl[i].pkte_nbytes = 0;
+ /* no need to initialize address and protocol in tbl */
+ }
+ }
+}
+
+static void
+ip_input_cpout_args(struct ip_fw_in_args *args, struct ip_fw_args *args1,
+ boolean_t *done_init)
+{
+ if (*done_init == FALSE) {
+ bzero(args1, sizeof(struct ip_fw_args));
+ *done_init = TRUE;
+ }
+ args1->fwa_next_hop = args->fwai_next_hop;
+ args1->fwa_ipfw_rule = args->fwai_ipfw_rule;
+ args1->fwa_pf_rule = args->fwai_pf_rule;
+ args1->fwa_divert_rule = args->fwai_divert_rule;
+}
+
+static void
+ip_input_cpin_args(struct ip_fw_args *args1, struct ip_fw_in_args *args)
+{
+ args->fwai_next_hop = args1->fwa_next_hop;
+ args->fwai_ipfw_rule = args1->fwa_ipfw_rule;
+ args->fwai_pf_rule = args1->fwa_pf_rule;
+ args->fwai_divert_rule = args1->fwa_divert_rule;
+}
+
+typedef enum {
+ IPINPUT_DOCHAIN = 0,
+ IPINPUT_DONTCHAIN,
+ IPINPUT_FREED,
+ IPINPUT_DONE
+} ipinput_chain_ret_t;
+
+static void
+ip_input_update_nstat(struct ifnet *ifp, struct in_addr src_ip,
+ u_int32_t packets, u_int32_t bytes)
+{
+ if (nstat_collect) {
+ struct rtentry *rt = ifnet_cached_rtlookup_inet(ifp,
+ src_ip);
+ if (rt != NULL) {
+ nstat_route_rx(rt, packets, bytes, 0);
+ rtfree(rt);
+ }
+ }
+}
+
+static void
+ip_input_dispatch_chain(struct mbuf *m)
+{
+ struct mbuf *tmp_mbuf = m;
+ struct mbuf *nxt_mbuf = NULL;
+ struct ip *ip = NULL;
+ unsigned int hlen;
+
+ ip = mtod(tmp_mbuf, struct ip *);
+ hlen = IP_VHL_HL(ip->ip_vhl) << 2;
+ while (tmp_mbuf) {
+ nxt_mbuf = mbuf_nextpkt(tmp_mbuf);
+ mbuf_setnextpkt(tmp_mbuf, NULL);
+
+ if ((sw_lro) && (ip->ip_p == IPPROTO_TCP)) {
+ tmp_mbuf = tcp_lro(tmp_mbuf, hlen);
+ }
+ if (tmp_mbuf) {
+ ip_proto_dispatch_in(tmp_mbuf, hlen, ip->ip_p, 0);
+ }
+ tmp_mbuf = nxt_mbuf;
+ if (tmp_mbuf) {
+ ip = mtod(tmp_mbuf, struct ip *);
+ /* first mbuf of chain already has adjusted ip_len */
+ hlen = IP_VHL_HL(ip->ip_vhl) << 2;
+ ip->ip_len -= hlen;
+ }
+ }
+}
+
+static void
+ip_input_setdst_chain(struct mbuf *m, uint32_t ifindex, struct in_ifaddr *ia)
+{
+ struct mbuf *tmp_mbuf = m;
+
+ while (tmp_mbuf) {
+ ip_setdstifaddr_info(tmp_mbuf, ifindex, ia);
+ tmp_mbuf = mbuf_nextpkt(tmp_mbuf);
+ }
+}
+
+static void
+ip_input_adjust(struct mbuf *m, struct ip *ip, struct ifnet *inifp)
+{
+ boolean_t adjust = TRUE;
+
+ ASSERT(m_pktlen(m) > ip->ip_len);
+
+ /*
+ * Invalidate hardware checksum info if ip_adj_clear_hwcksum
+ * is set; useful to handle buggy drivers. Note that this
+ * should not be enabled by default, as we may get here due
+ * to link-layer padding.
+ */
+ if (ip_adj_clear_hwcksum &&
+ (m->m_pkthdr.csum_flags & CSUM_DATA_VALID) &&
+ !(inifp->if_flags & IFF_LOOPBACK) &&
+ !(m->m_pkthdr.pkt_flags & PKTF_LOOP)) {
+ m->m_pkthdr.csum_flags &= ~CSUM_DATA_VALID;
+ m->m_pkthdr.csum_data = 0;
+ ipstat.ips_adj_hwcsum_clr++;
+ }
+
+ /*
+ * If partial checksum information is available, subtract
+ * out the partial sum of postpended extraneous bytes, and
+ * update the checksum metadata accordingly. By doing it
+ * here, the upper layer transport only needs to adjust any
+ * prepended extraneous bytes (else it will do both.)
+ */
+ if (ip_adj_partial_sum &&
+ (m->m_pkthdr.csum_flags & (CSUM_DATA_VALID | CSUM_PARTIAL)) ==
+ (CSUM_DATA_VALID | CSUM_PARTIAL)) {
+ m->m_pkthdr.csum_rx_val = m_adj_sum16(m,
+ m->m_pkthdr.csum_rx_start, m->m_pkthdr.csum_rx_start,
+ (ip->ip_len - m->m_pkthdr.csum_rx_start),
+ m->m_pkthdr.csum_rx_val);
+ } else if ((m->m_pkthdr.csum_flags &
+ (CSUM_DATA_VALID | CSUM_PARTIAL)) ==
+ (CSUM_DATA_VALID | CSUM_PARTIAL)) {
+ /*
+ * If packet has partial checksum info and we decided not
+ * to subtract the partial sum of postpended extraneous
+ * bytes here (not the default case), leave that work to
+ * be handled by the other layers. For now, only TCP, UDP
+ * layers are capable of dealing with this. For all other
+ * protocols (including fragments), trim and ditch the
+ * partial sum as those layers might not implement partial
+ * checksumming (or adjustment) at all.
+ */
+ if ((ip->ip_off & (IP_MF | IP_OFFMASK)) == 0 &&
+ (ip->ip_p == IPPROTO_TCP || ip->ip_p == IPPROTO_UDP)) {
+ adjust = FALSE;
+ } else {
+ m->m_pkthdr.csum_flags &= ~CSUM_DATA_VALID;
+ m->m_pkthdr.csum_data = 0;
+ ipstat.ips_adj_hwcsum_clr++;
+ }
+ }
+
+ if (adjust) {
+ ipstat.ips_adj++;
+ if (m->m_len == m->m_pkthdr.len) {
+ m->m_len = ip->ip_len;
+ m->m_pkthdr.len = ip->ip_len;
+ } else {
+ m_adj(m, ip->ip_len - m->m_pkthdr.len);
+ }
+ }
+}
+
+/*
+ * First pass does all essential packet validation and places on a per flow
+ * queue for doing operations that have same outcome for all packets of a flow.
+ * div_info is packet divert/tee info
+ */
+static ipinput_chain_ret_t
+ip_input_first_pass(struct mbuf *m, u_int32_t *div_info,
+ struct ip_fw_in_args *args, int *ours, struct mbuf **modm)
+{
+ struct ip *ip;
+ struct ifnet *inifp;
+ unsigned int hlen;
+ int retval = IPINPUT_DOCHAIN;
+ int len = 0;
+ struct in_addr src_ip;
+#if IPFIREWALL
+ int i;
+#endif
+#if IPFIREWALL || DUMMYNET
+ struct m_tag *copy;
+ struct m_tag *p;
+ boolean_t delete = FALSE;
+ struct ip_fw_args args1;
+ boolean_t init = FALSE;
+#endif
+ ipfilter_t inject_filter_ref = NULL;
+
+#if !IPFIREWALL
+#pragma unused (args)
+#endif
+
+#if !IPDIVERT
+#pragma unused (div_info)
+#pragma unused (ours)
+#endif
+
+#if !IPFIREWALL_FORWARD
+#pragma unused (ours)
+#endif
+
+ /* Check if the mbuf is still valid after interface filter processing */
+ MBUF_INPUT_CHECK(m, m->m_pkthdr.rcvif);
+ inifp = mbuf_pkthdr_rcvif(m);
+ VERIFY(inifp != NULL);
+
+ /* Perform IP header alignment fixup, if needed */
+ IP_HDR_ALIGNMENT_FIXUP(m, inifp, goto bad);
+
+ m->m_pkthdr.pkt_flags &= ~PKTF_FORWARDED;
+
+#if IPFIREWALL || DUMMYNET
+
+ /*
+ * Don't bother searching for tag(s) if there's none.
+ */
+ if (SLIST_EMPTY(&m->m_pkthdr.tags)) {
+ goto ipfw_tags_done;
+ }
+
+ /* Grab info from mtags prepended to the chain */
+ p = m_tag_first(m);
+ while (p) {
+ if (p->m_tag_id == KERNEL_MODULE_TAG_ID) {
+#if DUMMYNET
+ if (p->m_tag_type == KERNEL_TAG_TYPE_DUMMYNET) {
+ struct dn_pkt_tag *dn_tag;
+
+ dn_tag = (struct dn_pkt_tag *)(p + 1);
+ args->fwai_ipfw_rule = dn_tag->dn_ipfw_rule;
+ args->fwai_pf_rule = dn_tag->dn_pf_rule;
+ delete = TRUE;
+ }
+#endif
+
+#if IPDIVERT
+ if (p->m_tag_type == KERNEL_TAG_TYPE_DIVERT) {
+ struct divert_tag *div_tag;
+
+ div_tag = (struct divert_tag *)(p + 1);
+ args->fwai_divert_rule = div_tag->cookie;
+ delete = TRUE;
+ }
+#endif
+
+ if (p->m_tag_type == KERNEL_TAG_TYPE_IPFORWARD) {
+ struct ip_fwd_tag *ipfwd_tag;
+
+ ipfwd_tag = (struct ip_fwd_tag *)(p + 1);
+ args->fwai_next_hop = ipfwd_tag->next_hop;
+ delete = TRUE;
+ }
+
+ if (delete) {
+ copy = p;
+ p = m_tag_next(m, p);
+ m_tag_delete(m, copy);
+ } else {
+ p = m_tag_next(m, p);
+ }
+ } else {
+ p = m_tag_next(m, p);
+ }
+ }
+
+#if DIAGNOSTIC
+ if (m == NULL || !(m->m_flags & M_PKTHDR)) {
+ panic("ip_input no HDR");
+ }
+#endif
+
+#if DUMMYNET
+ if (args->fwai_ipfw_rule || args->fwai_pf_rule) {
+ /* dummynet already filtered us */
+ ip = mtod(m, struct ip *);
+ hlen = IP_VHL_HL(ip->ip_vhl) << 2;
+ inject_filter_ref = ipf_get_inject_filter(m);
+#if IPFIREWALL
+ if (args->fwai_ipfw_rule) {
+ goto iphack;
+ }
+#endif /* IPFIREWALL */
+ if (args->fwai_pf_rule) {
+ goto check_with_pf;
+ }
+ }
+#endif /* DUMMYNET */
+ipfw_tags_done:
+#endif /* IPFIREWALL || DUMMYNET */
+
+ /*
+ * No need to process packet twice if we've already seen it.
+ */
+ if (!SLIST_EMPTY(&m->m_pkthdr.tags)) {
+ inject_filter_ref = ipf_get_inject_filter(m);
+ }
+ if (inject_filter_ref != NULL) {
+ ip = mtod(m, struct ip *);
+ hlen = IP_VHL_HL(ip->ip_vhl) << 2;
+
+ DTRACE_IP6(receive, struct mbuf *, m, struct inpcb *, NULL,
+ struct ip *, ip, struct ifnet *, inifp,
+ struct ip *, ip, struct ip6_hdr *, NULL);
+
+ ip->ip_len = ntohs(ip->ip_len) - hlen;
+ ip->ip_off = ntohs(ip->ip_off);
+ ip_proto_dispatch_in(m, hlen, ip->ip_p, inject_filter_ref);
+ return IPINPUT_DONE;
+ }
+
+ if (m->m_pkthdr.len < sizeof(struct ip)) {
+ OSAddAtomic(1, &ipstat.ips_total);
+ OSAddAtomic(1, &ipstat.ips_tooshort);
+ m_freem(m);
+ return IPINPUT_FREED;
+ }
+
+ if (m->m_len < sizeof(struct ip) &&
+ (m = m_pullup(m, sizeof(struct ip))) == NULL) {
+ OSAddAtomic(1, &ipstat.ips_total);
+ OSAddAtomic(1, &ipstat.ips_toosmall);
+ return IPINPUT_FREED;
+ }
+
+ ip = mtod(m, struct ip *);
+ *modm = m;
+
+ KERNEL_DEBUG(DBG_LAYER_BEG, ip->ip_dst.s_addr, ip->ip_src.s_addr,
+ ip->ip_p, ip->ip_off, ip->ip_len);
+
+ if (IP_VHL_V(ip->ip_vhl) != IPVERSION) {
+ OSAddAtomic(1, &ipstat.ips_total);
+ OSAddAtomic(1, &ipstat.ips_badvers);
+ KERNEL_DEBUG(DBG_LAYER_END, 0, 0, 0, 0, 0);
+ m_freem(m);
+ return IPINPUT_FREED;
+ }
+
+ hlen = IP_VHL_HL(ip->ip_vhl) << 2;
+ if (hlen < sizeof(struct ip)) {
+ OSAddAtomic(1, &ipstat.ips_total);
+ OSAddAtomic(1, &ipstat.ips_badhlen);
+ KERNEL_DEBUG(DBG_LAYER_END, 0, 0, 0, 0, 0);
+ m_freem(m);
+ return IPINPUT_FREED;
+ }
+
+ if (hlen > m->m_len) {
+ if ((m = m_pullup(m, hlen)) == NULL) {
+ OSAddAtomic(1, &ipstat.ips_total);
+ OSAddAtomic(1, &ipstat.ips_badhlen);
+ KERNEL_DEBUG(DBG_LAYER_END, 0, 0, 0, 0, 0);
+ return IPINPUT_FREED;
+ }
+ ip = mtod(m, struct ip *);
+ *modm = m;
+ }
+
+ /* 127/8 must not appear on wire - RFC1122 */
+ if ((ntohl(ip->ip_dst.s_addr) >> IN_CLASSA_NSHIFT) == IN_LOOPBACKNET ||
+ (ntohl(ip->ip_src.s_addr) >> IN_CLASSA_NSHIFT) == IN_LOOPBACKNET) {
+ /*
+ * Allow for the following exceptions:
+ *
+ * 1. If the packet was sent to loopback (i.e. rcvif
+ * would have been set earlier at output time.)
+ *
+ * 2. If the packet was sent out on loopback from a local
+ * source address which belongs to a non-loopback
+ * interface (i.e. rcvif may not necessarily be a
+ * loopback interface, hence the test for PKTF_LOOP.)
+ * Unlike IPv6, there is no interface scope ID, and
+ * therefore we don't care so much about PKTF_IFINFO.
+ */
+ if (!(inifp->if_flags & IFF_LOOPBACK) &&
+ !(m->m_pkthdr.pkt_flags & PKTF_LOOP)) {
+ OSAddAtomic(1, &ipstat.ips_total);
+ OSAddAtomic(1, &ipstat.ips_badaddr);
+ KERNEL_DEBUG(DBG_LAYER_END, 0, 0, 0, 0, 0);
+ m_freem(m);
+ return IPINPUT_FREED;
+ }
+ }
+
+ /* IPv4 Link-Local Addresses as defined in RFC3927 */
+ if ((IN_LINKLOCAL(ntohl(ip->ip_dst.s_addr)) ||
+ IN_LINKLOCAL(ntohl(ip->ip_src.s_addr)))) {
+ ip_linklocal_stat.iplls_in_total++;
+ if (ip->ip_ttl != MAXTTL) {
+ OSAddAtomic(1, &ip_linklocal_stat.iplls_in_badttl);
+ /* Silently drop link local traffic with bad TTL */
+ if (!ip_linklocal_in_allowbadttl) {
+ OSAddAtomic(1, &ipstat.ips_total);
+ KERNEL_DEBUG(DBG_LAYER_END, 0, 0, 0, 0, 0);
+ m_freem(m);
+ return IPINPUT_FREED;
+ }
+ }
+ }
+
+ if (ip_cksum(m, hlen)) {
+ OSAddAtomic(1, &ipstat.ips_total);
+ KERNEL_DEBUG(DBG_LAYER_END, 0, 0, 0, 0, 0);
+ m_freem(m);
+ return IPINPUT_FREED;
+ }
+
+ DTRACE_IP6(receive, struct mbuf *, m, struct inpcb *, NULL,
+ struct ip *, ip, struct ifnet *, inifp,
+ struct ip *, ip, struct ip6_hdr *, NULL);
+
+ /*
+ * Convert fields to host representation.
+ */
+#if BYTE_ORDER != BIG_ENDIAN
+ NTOHS(ip->ip_len);
+#endif
+
+ if (ip->ip_len < hlen) {
+ OSAddAtomic(1, &ipstat.ips_total);
+ OSAddAtomic(1, &ipstat.ips_badlen);
+ KERNEL_DEBUG(DBG_LAYER_END, 0, 0, 0, 0, 0);
+ m_freem(m);
+ return IPINPUT_FREED;
+ }
+
+#if BYTE_ORDER != BIG_ENDIAN
+ NTOHS(ip->ip_off);
+#endif
+
+ /*
+ * Check that the amount of data in the buffers
+ * is as at least much as the IP header would have us expect.
+ * Trim mbufs if longer than we expect.
+ * Drop packet if shorter than we expect.
+ */
+ if (m->m_pkthdr.len < ip->ip_len) {
+ OSAddAtomic(1, &ipstat.ips_total);
+ OSAddAtomic(1, &ipstat.ips_tooshort);
+ KERNEL_DEBUG(DBG_LAYER_END, 0, 0, 0, 0, 0);
+ m_freem(m);
+ return IPINPUT_FREED;
+ }
+
+ if (m->m_pkthdr.len > ip->ip_len) {
+ ip_input_adjust(m, ip, inifp);
+ }
+
+ /* for consistency */
+ m->m_pkthdr.pkt_proto = ip->ip_p;
+
+ /* for netstat route statistics */
+ src_ip = ip->ip_src;
+ len = m->m_pkthdr.len;
+
+#if DUMMYNET
+check_with_pf:
+#endif
+#if PF
+ /* Invoke inbound packet filter */
+ if (PF_IS_ENABLED) {
+ int error;
+ ip_input_cpout_args(args, &args1, &init);
+ ip = mtod(m, struct ip *);
+ src_ip = ip->ip_src;
+
+#if DUMMYNET
+ error = pf_af_hook(inifp, NULL, &m, AF_INET, TRUE, &args1);
+#else
+ error = pf_af_hook(inifp, NULL, &m, AF_INET, TRUE, NULL);
+#endif /* DUMMYNET */
+ if (error != 0 || m == NULL) {
+ if (m != NULL) {
+ panic("%s: unexpected packet %p\n",
+ __func__, m);
+ /* NOTREACHED */
+ }
+ /* Already freed by callee */
+ ip_input_update_nstat(inifp, src_ip, 1, len);
+ KERNEL_DEBUG(DBG_LAYER_END, 0, 0, 0, 0, 0);
+ OSAddAtomic(1, &ipstat.ips_total);
+ return IPINPUT_FREED;
+ }
+ ip = mtod(m, struct ip *);
+ hlen = IP_VHL_HL(ip->ip_vhl) << 2;
+ *modm = m;
+ ip_input_cpin_args(&args1, args);
+ }
+#endif /* PF */
+
+#if IPSEC
+ if (ipsec_bypass == 0 && ipsec_gethist(m, NULL)) {
+ retval = IPINPUT_DONTCHAIN; /* XXX scope for chaining here? */
+ goto pass;
+ }
+#endif
+
+#if IPFIREWALL
+#if DUMMYNET
+iphack:
+#endif /* DUMMYNET */
+ /*
+ * Check if we want to allow this packet to be processed.
+ * Consider it to be bad if not.
+ */
+ if (fw_enable && IPFW_LOADED) {
+#if IPFIREWALL_FORWARD
+ /*
+ * If we've been forwarded from the output side, then
+ * skip the firewall a second time
+ */
+ if (args->fwai_next_hop) {
+ *ours = 1;
+ return IPINPUT_DONTCHAIN;
+ }
+#endif /* IPFIREWALL_FORWARD */
+ ip_input_cpout_args(args, &args1, &init);
+ args1.fwa_m = m;
+
+ i = ip_fw_chk_ptr(&args1);
+ m = args1.fwa_m;
+
+ if ((i & IP_FW_PORT_DENY_FLAG) || m == NULL) { /* drop */
+ if (m) {
+ m_freem(m);
+ }
+ ip_input_update_nstat(inifp, src_ip, 1, len);
+ KERNEL_DEBUG(DBG_LAYER_END, 0, 0, 0, 0, 0);
+ OSAddAtomic(1, &ipstat.ips_total);
+ return IPINPUT_FREED;
+ }
+ ip = mtod(m, struct ip *); /* just in case m changed */
+ *modm = m;
+ ip_input_cpin_args(&args1, args);
+
+ if (i == 0 && args->fwai_next_hop == NULL) { /* common case */
+ goto pass;
+ }
+#if DUMMYNET
+ if (DUMMYNET_LOADED && (i & IP_FW_PORT_DYNT_FLAG) != 0) {
+ /* Send packet to the appropriate pipe */
+ ip_dn_io_ptr(m, i & 0xffff, DN_TO_IP_IN, &args1,
+ DN_CLIENT_IPFW);
+ ip_input_update_nstat(inifp, src_ip, 1, len);
+ KERNEL_DEBUG(DBG_LAYER_END, 0, 0, 0, 0, 0);
+ OSAddAtomic(1, &ipstat.ips_total);
+ return IPINPUT_FREED;
+ }
+#endif /* DUMMYNET */
+#if IPDIVERT
+ if (i != 0 && (i & IP_FW_PORT_DYNT_FLAG) == 0) {
+ /* Divert or tee packet */
+ *div_info = i;
+ *ours = 1;
+ return IPINPUT_DONTCHAIN;
+ }
+#endif
+#if IPFIREWALL_FORWARD
+ if (i == 0 && args->fwai_next_hop != NULL) {
+ retval = IPINPUT_DONTCHAIN;
+ goto pass;
+ }
+#endif
+ /*
+ * if we get here, the packet must be dropped
+ */
+ ip_input_update_nstat(inifp, src_ip, 1, len);
+ KERNEL_DEBUG(DBG_LAYER_END, 0, 0, 0, 0, 0);
+ m_freem(m);
+ OSAddAtomic(1, &ipstat.ips_total);
+ return IPINPUT_FREED;
+ }
+#endif /* IPFIREWALL */
+#if IPSEC | IPFIREWALL
+pass:
+#endif
+ /*
+ * Process options and, if not destined for us,
+ * ship it on. ip_dooptions returns 1 when an
+ * error was detected (causing an icmp message
+ * to be sent and the original packet to be freed).
+ */
+ ip_nhops = 0; /* for source routed packets */
+#if IPFIREWALL
+ if (hlen > sizeof(struct ip) &&
+ ip_dooptions(m, 0, args->fwai_next_hop)) {
+#else /* !IPFIREWALL */
+ if (hlen > sizeof(struct ip) && ip_dooptions(m, 0, NULL)) {
+#endif /* !IPFIREWALL */
+ ip_input_update_nstat(inifp, src_ip, 1, len);
+ KERNEL_DEBUG(DBG_LAYER_END, 0, 0, 0, 0, 0);
+ OSAddAtomic(1, &ipstat.ips_total);
+ return IPINPUT_FREED;
+ }
+
+ /*
+ * Don't chain fragmented packets as the process of determining
+ * if it is our fragment or someone else's plus the complexity of
+ * divert and fw args makes it harder to do chaining.
+ */
+ if (ip->ip_off & ~(IP_DF | IP_RF)) {
+ return IPINPUT_DONTCHAIN;
+ }
+
+ /* Allow DHCP/BootP responses through */
+ if ((inifp->if_eflags & IFEF_AUTOCONFIGURING) &&
+ hlen == sizeof(struct ip) && ip->ip_p == IPPROTO_UDP) {
+ struct udpiphdr *ui;
+
+ if (m->m_len < sizeof(struct udpiphdr) &&
+ (m = m_pullup(m, sizeof(struct udpiphdr))) == NULL) {
+ OSAddAtomic(1, &udpstat.udps_hdrops);
+ KERNEL_DEBUG(DBG_LAYER_END, 0, 0, 0, 0, 0);
+ OSAddAtomic(1, &ipstat.ips_total);
+ return IPINPUT_FREED;
+ }
+ *modm = m;
+ ui = mtod(m, struct udpiphdr *);
+ if (ntohs(ui->ui_dport) == IPPORT_BOOTPC) {
+ ip_setdstifaddr_info(m, inifp->if_index, NULL);
+ return IPINPUT_DONTCHAIN;
+ }
+ }
+
+ /* Avoid chaining raw sockets as ipsec checks occur later for them */
+ if (ip_protox[ip->ip_p]->pr_flags & PR_LASTHDR) {
+ return IPINPUT_DONTCHAIN;
+ }
+
+ return retval;
+#if !defined(__i386__) && !defined(__x86_64__)
+bad:
+ m_freem(m);
+ return IPINPUT_FREED;
+#endif
+}
+
+static void
+ip_input_second_pass(struct mbuf *m, struct ifnet *inifp, u_int32_t div_info,
+ int npkts_in_chain, int bytes_in_chain, struct ip_fw_in_args *args, int ours)
+{
+ unsigned int checkif;
+ struct mbuf *tmp_mbuf = NULL;
+ struct in_ifaddr *ia = NULL;
+ struct in_addr pkt_dst;
+ unsigned int hlen;
+
+#if !IPFIREWALL
+#pragma unused (args)
+#endif
+
+#if !IPDIVERT
+#pragma unused (div_info)
+#endif
+
+ struct ip *ip = mtod(m, struct ip *);
+ hlen = IP_VHL_HL(ip->ip_vhl) << 2;
+
+ OSAddAtomic(npkts_in_chain, &ipstat.ips_total);
+
+ /*
+ * Naively assume we can attribute inbound data to the route we would
+ * use to send to this destination. Asymmetric routing breaks this
+ * assumption, but it still allows us to account for traffic from
+ * a remote node in the routing table.
+ * this has a very significant performance impact so we bypass
+ * if nstat_collect is disabled. We may also bypass if the
+ * protocol is tcp in the future because tcp will have a route that
+ * we can use to attribute the data to. That does mean we would not
+ * account for forwarded tcp traffic.
+ */
+ ip_input_update_nstat(inifp, ip->ip_src, npkts_in_chain,
+ bytes_in_chain);
+
+ if (ours) {
+ goto ours;
+ }
+
+ /*
+ * Check our list of addresses, to see if the packet is for us.
+ * If we don't have any addresses, assume any unicast packet
+ * we receive might be for us (and let the upper layers deal
+ * with it).
+ */
+ tmp_mbuf = m;
+ if (TAILQ_EMPTY(&in_ifaddrhead)) {
+ while (tmp_mbuf) {
+ if (!(tmp_mbuf->m_flags & (M_MCAST | M_BCAST))) {
+ ip_setdstifaddr_info(tmp_mbuf, inifp->if_index,
+ NULL);
+ }
+ tmp_mbuf = mbuf_nextpkt(tmp_mbuf);
+ }
+ goto ours;
+ }
+ /*
+ * Cache the destination address of the packet; this may be
+ * changed by use of 'ipfw fwd'.
+ */
+#if IPFIREWALL
+ pkt_dst = args->fwai_next_hop == NULL ?
+ ip->ip_dst : args->fwai_next_hop->sin_addr;
+#else /* !IPFIREWALL */
+ pkt_dst = ip->ip_dst;
+#endif /* !IPFIREWALL */
+
+ /*
+ * Enable a consistency check between the destination address
+ * and the arrival interface for a unicast packet (the RFC 1122
+ * strong ES model) if IP forwarding is disabled and the packet
+ * is not locally generated and the packet is not subject to
+ * 'ipfw fwd'.
+ *
+ * XXX - Checking also should be disabled if the destination
+ * address is ipnat'ed to a different interface.
+ *
+ * XXX - Checking is incompatible with IP aliases added
+ * to the loopback interface instead of the interface where
+ * the packets are received.
+ */
+ checkif = ip_checkinterface && (ipforwarding == 0) &&
+ !(inifp->if_flags & IFF_LOOPBACK) &&
+ !(m->m_pkthdr.pkt_flags & PKTF_LOOP)
+#if IPFIREWALL
+ && (args->fwai_next_hop == NULL);
+#else /* !IPFIREWALL */
+ ;
+#endif /* !IPFIREWALL */
+
+ /*
+ * Check for exact addresses in the hash bucket.
+ */
+ lck_rw_lock_shared(in_ifaddr_rwlock);
+ TAILQ_FOREACH(ia, INADDR_HASH(pkt_dst.s_addr), ia_hash) {
+ /*
+ * If the address matches, verify that the packet
+ * arrived via the correct interface if checking is
+ * enabled.
+ */
+ if (IA_SIN(ia)->sin_addr.s_addr == pkt_dst.s_addr &&
+ (!checkif || ia->ia_ifp == inifp)) {
+ ip_input_setdst_chain(m, 0, ia);
+ lck_rw_done(in_ifaddr_rwlock);
+ goto ours;
+ }
+ }
+ lck_rw_done(in_ifaddr_rwlock);
+
+ /*
+ * Check for broadcast addresses.
+ *
+ * Only accept broadcast packets that arrive via the matching
+ * interface. Reception of forwarded directed broadcasts would be
+ * handled via ip_forward() and ether_frameout() with the loopback
+ * into the stack for SIMPLEX interfaces handled by ether_frameout().
+ */
+ if (inifp->if_flags & IFF_BROADCAST) {
+ struct ifaddr *ifa;
+
+ ifnet_lock_shared(inifp);
+ TAILQ_FOREACH(ifa, &inifp->if_addrhead, ifa_link) {
+ if (ifa->ifa_addr->sa_family != AF_INET) {
+ continue;
+ }
+ ia = ifatoia(ifa);
+ if (satosin(&ia->ia_broadaddr)->sin_addr.s_addr ==
+ pkt_dst.s_addr || ia->ia_netbroadcast.s_addr ==
+ pkt_dst.s_addr) {
+ ip_input_setdst_chain(m, 0, ia);
+ ifnet_lock_done(inifp);
+ goto ours;
+ }
+ }
+ ifnet_lock_done(inifp);
+ }
+
+ if (IN_MULTICAST(ntohl(ip->ip_dst.s_addr))) {
+ struct in_multi *inm;
+ /*
+ * See if we belong to the destination multicast group on the
+ * arrival interface.
+ */
+ in_multihead_lock_shared();
+ IN_LOOKUP_MULTI(&ip->ip_dst, inifp, inm);
+ in_multihead_lock_done();
+ if (inm == NULL) {
+ OSAddAtomic(npkts_in_chain, &ipstat.ips_notmember);
+ m_freem_list(m);
+ KERNEL_DEBUG(DBG_LAYER_END, 0, 0, 0, 0, 0);
+ return;
+ }
+ ip_input_setdst_chain(m, inifp->if_index, NULL);
+ INM_REMREF(inm);
+ goto ours;
+ }
+
+ if (ip->ip_dst.s_addr == (u_int32_t)INADDR_BROADCAST ||
+ ip->ip_dst.s_addr == INADDR_ANY) {
+ ip_input_setdst_chain(m, inifp->if_index, NULL);
+ goto ours;
+ }
+
+ if (ip->ip_p == IPPROTO_UDP) {
+ struct udpiphdr *ui;
+ ui = mtod(m, struct udpiphdr *);
+ if (ntohs(ui->ui_dport) == IPPORT_BOOTPC) {
+ goto ours;
+ }
+ }
+
+ tmp_mbuf = m;
+ struct mbuf *nxt_mbuf = NULL;
+ while (tmp_mbuf) {
+ nxt_mbuf = mbuf_nextpkt(tmp_mbuf);
+ /*
+ * Not for us; forward if possible and desirable.
+ */
+ mbuf_setnextpkt(tmp_mbuf, NULL);
+ if (ipforwarding == 0) {
+ OSAddAtomic(1, &ipstat.ips_cantforward);
+ m_freem(tmp_mbuf);
+ } else {
+#if IPFIREWALL
+ ip_forward(tmp_mbuf, 0, args->fwai_next_hop);
+#else
+ ip_forward(tmp_mbuf, 0, NULL);
+#endif
+ }
+ tmp_mbuf = nxt_mbuf;
+ }
+ KERNEL_DEBUG(DBG_LAYER_END, 0, 0, 0, 0, 0);
+ return;
+ours:
+ /*
+ * If offset or IP_MF are set, must reassemble.
+ */
+ if (ip->ip_off & ~(IP_DF | IP_RF)) {
+ VERIFY(npkts_in_chain == 1);
+ /*
+ * ip_reass() will return a different mbuf, and update
+ * the divert info in div_info and args->fwai_divert_rule.
+ */
+#if IPDIVERT
+ m = ip_reass(m, (u_int16_t *)&div_info, &args->fwai_divert_rule);
+#else
+ m = ip_reass(m);
+#endif
+ if (m == NULL) {
+ return;
+ }
+ ip = mtod(m, struct ip *);
+ /* Get the header length of the reassembled packet */
+ hlen = IP_VHL_HL(ip->ip_vhl) << 2;
+#if IPDIVERT
+ /* Restore original checksum before diverting packet */
+ if (div_info != 0) {
+ VERIFY(npkts_in_chain == 1);
+#if BYTE_ORDER != BIG_ENDIAN
+ HTONS(ip->ip_len);
+ HTONS(ip->ip_off);
+#endif
+ ip->ip_sum = 0;
+ ip->ip_sum = ip_cksum_hdr_in(m, hlen);
+#if BYTE_ORDER != BIG_ENDIAN
+ NTOHS(ip->ip_off);
+ NTOHS(ip->ip_len);
+#endif
+ }
+#endif
+ }
+
+ /*
+ * Further protocols expect the packet length to be w/o the
+ * IP header.
+ */
+ ip->ip_len -= hlen;
+
+#if IPDIVERT
+ /*
+ * Divert or tee packet to the divert protocol if required.
+ *
+ * If div_info is zero then cookie should be too, so we shouldn't
+ * need to clear them here. Assume divert_packet() does so also.
+ */
+ if (div_info != 0) {
+ struct mbuf *clone = NULL;
+ VERIFY(npkts_in_chain == 1);
+
+ /* Clone packet if we're doing a 'tee' */
+ if (div_info & IP_FW_PORT_TEE_FLAG) {
+ clone = m_dup(m, M_DONTWAIT);
+ }
+
+ /* Restore packet header fields to original values */
+ ip->ip_len += hlen;
+
+#if BYTE_ORDER != BIG_ENDIAN
+ HTONS(ip->ip_len);
+ HTONS(ip->ip_off);
+#endif
+ /* Deliver packet to divert input routine */
+ OSAddAtomic(1, &ipstat.ips_delivered);
+ divert_packet(m, 1, div_info & 0xffff, args->fwai_divert_rule);
+
+ /* If 'tee', continue with original packet */
+ if (clone == NULL) {
+ return;
+ }
+ m = clone;
+ ip = mtod(m, struct ip *);
+ }
+#endif
+
+#if IPSEC
+ /*
+ * enforce IPsec policy checking if we are seeing last header.
+ * note that we do not visit this with protocols with pcb layer
+ * code - like udp/tcp/raw ip.
+ */
+ if (ipsec_bypass == 0 && (ip_protox[ip->ip_p]->pr_flags & PR_LASTHDR)) {
+ VERIFY(npkts_in_chain == 1);
+ if (ipsec4_in_reject(m, NULL)) {
+ IPSEC_STAT_INCREMENT(ipsecstat.in_polvio);
+ goto bad;
+ }
+ }
+#endif /* IPSEC */
+
+ /*
+ * Switch out to protocol's input routine.
+ */
+ OSAddAtomic(npkts_in_chain, &ipstat.ips_delivered);
+
+#if IPFIREWALL
+ if (args->fwai_next_hop && ip->ip_p == IPPROTO_TCP) {
+ /* TCP needs IPFORWARD info if available */
+ struct m_tag *fwd_tag;
+ struct ip_fwd_tag *ipfwd_tag;
+
+ VERIFY(npkts_in_chain == 1);
+ fwd_tag = m_tag_create(KERNEL_MODULE_TAG_ID,
+ KERNEL_TAG_TYPE_IPFORWARD, sizeof(*ipfwd_tag),
+ M_NOWAIT, m);
+ if (fwd_tag == NULL) {
+ goto bad;
+ }
+
+ ipfwd_tag = (struct ip_fwd_tag *)(fwd_tag + 1);
+ ipfwd_tag->next_hop = args->fwai_next_hop;
+
+ m_tag_prepend(m, fwd_tag);
+
+ KERNEL_DEBUG(DBG_LAYER_END, ip->ip_dst.s_addr,
+ ip->ip_src.s_addr, ip->ip_p, ip->ip_off, ip->ip_len);
+
+ /* TCP deals with its own locking */
+ ip_proto_dispatch_in(m, hlen, ip->ip_p, 0);
+ } else {
+ KERNEL_DEBUG(DBG_LAYER_END, ip->ip_dst.s_addr,
+ ip->ip_src.s_addr, ip->ip_p, ip->ip_off, ip->ip_len);
+
+ ip_input_dispatch_chain(m);
+ }
+#else /* !IPFIREWALL */
+ ip_input_dispatch_chain(m);
+
+#endif /* !IPFIREWALL */
+ KERNEL_DEBUG(DBG_LAYER_END, 0, 0, 0, 0, 0);
+ return;
+bad:
+ KERNEL_DEBUG(DBG_LAYER_END, 0, 0, 0, 0, 0);
+ m_freem(m);
+}
+
+void
+ip_input_process_list(struct mbuf *packet_list)
+{
+ pktchain_elm_t pktchain_tbl[PKTTBL_SZ];
+
+ struct mbuf *packet = NULL;
+ struct mbuf *modm = NULL; /* modified mbuf */
+ int retval = 0;
+ u_int32_t div_info = 0;
+ int ours = 0;
+#if (DEBUG || DEVELOPMENT)
+ struct timeval start_tv;
+#endif /* (DEBUG || DEVELOPMENT) */
+ int num_pkts = 0;
+ int chain = 0;
+ struct ip_fw_in_args args;
+
+ if (ip_chaining == 0) {
+ struct mbuf *m = packet_list;
+#if (DEBUG || DEVELOPMENT)
+ if (ip_input_measure) {
+ net_perf_start_time(&net_perf, &start_tv);
+ }
+#endif /* (DEBUG || DEVELOPMENT) */
+
+ while (m) {
+ packet_list = mbuf_nextpkt(m);
+ mbuf_setnextpkt(m, NULL);
+ ip_input(m);
+ m = packet_list;
+ num_pkts++;
+ }
+#if (DEBUG || DEVELOPMENT)
+ if (ip_input_measure) {
+ net_perf_measure_time(&net_perf, &start_tv, num_pkts);
+ }
+#endif /* (DEBUG || DEVELOPMENT) */
+ return;
+ }
+#if (DEBUG || DEVELOPMENT)
+ if (ip_input_measure) {
+ net_perf_start_time(&net_perf, &start_tv);
+ }
+#endif /* (DEBUG || DEVELOPMENT) */
+
+ bzero(&pktchain_tbl, sizeof(pktchain_tbl));
+restart_list_process:
+ chain = 0;
+ for (packet = packet_list; packet; packet = packet_list) {
+ packet_list = mbuf_nextpkt(packet);
+ mbuf_setnextpkt(packet, NULL);
+
+ num_pkts++;
+ modm = NULL;
+ div_info = 0;
+ bzero(&args, sizeof(args));
+
+ retval = ip_input_first_pass(packet, &div_info, &args,
+ &ours, &modm);
+
+ if (retval == IPINPUT_DOCHAIN) {
+ if (modm) {
+ packet = modm;
+ }
+ packet = ip_chain_insert(packet, &pktchain_tbl[0]);
+ if (packet == NULL) {
+ ipstat.ips_rxc_chained++;
+ chain++;
+ if (chain > ip_chainsz) {
+ break;
+ }
+ } else {
+ ipstat.ips_rxc_collisions++;
+ break;
+ }
+ } else if (retval == IPINPUT_DONTCHAIN) {
+ /* in order to preserve order, exit from chaining */
+ if (modm) {
+ packet = modm;
+ }
+ ipstat.ips_rxc_notchain++;
+ break;
+ } else {
+ /* packet was freed or delivered, do nothing. */
+ }
}
- /* Perform IP header alignment fixup (post-filters), if needed */
- IP_HDR_ALIGNMENT_FIXUP(m, m->m_pkthdr.rcvif, return);
+ /* do second pass here for pktchain_tbl */
+ if (chain) {
+ ip_input_second_pass_loop_tbl(&pktchain_tbl[0], &args);
+ }
- /*
- * If there isn't a specific lock for the protocol
- * we're about to call, use the generic lock for AF_INET.
- * otherwise let the protocol deal with its own locking
- */
- ip = mtod(m, struct ip *);
+ if (packet) {
+ /*
+ * equivalent update in chaining case if performed in
+ * ip_input_second_pass_loop_tbl().
+ */
+#if (DEBUG || DEVELOPMENT)
+ if (ip_input_measure) {
+ net_perf_histogram(&net_perf, 1);
+ }
+#endif /* (DEBUG || DEVELOPMENT) */
+ ip_input_second_pass(packet, packet->m_pkthdr.rcvif, div_info,
+ 1, packet->m_pkthdr.len, &args, ours);
+ }
- if (changed_header) {
- ip->ip_len = ntohs(ip->ip_len) - hlen;
- ip->ip_off = ntohs(ip->ip_off);
+ if (packet_list) {
+ goto restart_list_process;
}
- if ((pr_input = ip_protox[ip->ip_p]->pr_input) == NULL) {
- m_freem(m);
- } else if (!(ip_protox[ip->ip_p]->pr_flags & PR_PROTOLOCK)) {
- lck_mtx_lock(inet_domain_mutex);
- pr_input(m, hlen);
- lck_mtx_unlock(inet_domain_mutex);
- } else {
- pr_input(m, hlen);
+#if (DEBUG || DEVELOPMENT)
+ if (ip_input_measure) {
+ net_perf_measure_time(&net_perf, &start_tv, num_pkts);
}
+#endif /* (DEBUG || DEVELOPMENT) */
}
-
/*
* Ip input routine. Checksum and byte swap header. If fragmented
* try to reassemble. Process options. Pass to next level.
struct in_addr pkt_dst;
#if IPFIREWALL
int i;
- u_int32_t div_info = 0; /* packet divert/tee info */
+ u_int32_t div_info = 0; /* packet divert/tee info */
#endif
#if IPFIREWALL || DUMMYNET
struct ip_fw_args args;
- struct m_tag *tag;
+ struct m_tag *tag;
#endif
ipfilter_t inject_filter_ref = NULL;
struct ifnet *inifp;
inifp = m->m_pkthdr.rcvif;
VERIFY(inifp != NULL);
+ ipstat.ips_rxc_notlist++;
+
/* Perform IP header alignment fixup, if needed */
IP_HDR_ALIGNMENT_FIXUP(m, inifp, goto bad);
m->m_pkthdr.pkt_flags &= ~PKTF_FORWARDED;
#if IPFIREWALL || DUMMYNET
- bzero(&args, sizeof (struct ip_fw_args));
+ bzero(&args, sizeof(struct ip_fw_args));
/*
* Don't bother searching for tag(s) if there's none.
*/
- if (SLIST_EMPTY(&m->m_pkthdr.tags))
+ if (SLIST_EMPTY(&m->m_pkthdr.tags)) {
goto ipfw_tags_done;
+ }
/* Grab info from mtags prepended to the chain */
#if DUMMYNET
KERNEL_TAG_TYPE_DUMMYNET, NULL)) != NULL) {
struct dn_pkt_tag *dn_tag;
- dn_tag = (struct dn_pkt_tag *)(tag+1);
+ dn_tag = (struct dn_pkt_tag *)(tag + 1);
args.fwa_ipfw_rule = dn_tag->dn_ipfw_rule;
args.fwa_pf_rule = dn_tag->dn_pf_rule;
KERNEL_TAG_TYPE_DIVERT, NULL)) != NULL) {
struct divert_tag *div_tag;
- div_tag = (struct divert_tag *)(tag+1);
+ div_tag = (struct divert_tag *)(tag + 1);
args.fwa_divert_rule = div_tag->cookie;
m_tag_delete(m, tag);
KERNEL_TAG_TYPE_IPFORWARD, NULL)) != NULL) {
struct ip_fwd_tag *ipfwd_tag;
- ipfwd_tag = (struct ip_fwd_tag *)(tag+1);
+ ipfwd_tag = (struct ip_fwd_tag *)(tag + 1);
args.fwa_next_hop = ipfwd_tag->next_hop;
m_tag_delete(m, tag);
}
-#if DIAGNOSTIC
- if (m == NULL || !(m->m_flags & M_PKTHDR))
+#if DIAGNOSTIC
+ if (m == NULL || !(m->m_flags & M_PKTHDR)) {
panic("ip_input no HDR");
+ }
#endif
#if DUMMYNET
hlen = IP_VHL_HL(ip->ip_vhl) << 2;
inject_filter_ref = ipf_get_inject_filter(m);
#if IPFIREWALL
- if (args.fwa_ipfw_rule)
+ if (args.fwa_ipfw_rule) {
goto iphack;
+ }
#endif /* IPFIREWALL */
- if (args.fwa_pf_rule)
+ if (args.fwa_pf_rule) {
goto check_with_pf;
+ }
}
#endif /* DUMMYNET */
ipfw_tags_done:
/*
* No need to process packet twice if we've already seen it.
*/
- if (!SLIST_EMPTY(&m->m_pkthdr.tags))
+ if (!SLIST_EMPTY(&m->m_pkthdr.tags)) {
inject_filter_ref = ipf_get_inject_filter(m);
+ }
if (inject_filter_ref != NULL) {
ip = mtod(m, struct ip *);
hlen = IP_VHL_HL(ip->ip_vhl) << 2;
}
OSAddAtomic(1, &ipstat.ips_total);
- if (m->m_pkthdr.len < sizeof (struct ip))
+ if (m->m_pkthdr.len < sizeof(struct ip)) {
goto tooshort;
+ }
- if (m->m_len < sizeof (struct ip) &&
- (m = m_pullup(m, sizeof (struct ip))) == NULL) {
+ if (m->m_len < sizeof(struct ip) &&
+ (m = m_pullup(m, sizeof(struct ip))) == NULL) {
OSAddAtomic(1, &ipstat.ips_toosmall);
return;
}
}
hlen = IP_VHL_HL(ip->ip_vhl) << 2;
- if (hlen < sizeof (struct ip)) { /* minimum header length */
+ if (hlen < sizeof(struct ip)) { /* minimum header length */
OSAddAtomic(1, &ipstat.ips_badhlen);
goto bad;
}
if (ip->ip_ttl != MAXTTL) {
OSAddAtomic(1, &ip_linklocal_stat.iplls_in_badttl);
/* Silently drop link local traffic with bad TTL */
- if (!ip_linklocal_in_allowbadttl)
+ if (!ip_linklocal_in_allowbadttl) {
goto bad;
+ }
}
}
/*
* Naively assume we can attribute inbound data to the route we would
- * use to send to this destination. Asymetric routing breaks this
+ * use to send to this destination. Asymmetric routing breaks this
* assumption, but it still allows us to account for traffic from
* a remote node in the routing table.
* this has a very significant performance impact so we bypass
goto bad;
}
if (m->m_pkthdr.len > ip->ip_len) {
- /*
- * Invalidate hardware checksum info if ip_adj_clear_hwcksum
- * is set; useful to handle buggy drivers. Note that this
- * should not be enabled by default, as we may get here due
- * to link-layer padding.
- */
- if (ip_adj_clear_hwcksum &&
- (m->m_pkthdr.csum_flags & CSUM_DATA_VALID) &&
- !(inifp->if_flags & IFF_LOOPBACK) &&
- !(m->m_pkthdr.pkt_flags & PKTF_LOOP)) {
- m->m_pkthdr.csum_flags &= ~CSUM_DATA_VALID;
- m->m_pkthdr.csum_data = 0;
- ipstat.ips_adj_hwcsum_clr++;
- }
-
- ipstat.ips_adj++;
- if (m->m_len == m->m_pkthdr.len) {
- m->m_len = ip->ip_len;
- m->m_pkthdr.len = ip->ip_len;
- } else
- m_adj(m, ip->ip_len - m->m_pkthdr.len);
+ ip_input_adjust(m, ip, inifp);
}
/* for consistency */
#endif /* PF */
#if IPSEC
- if (ipsec_bypass == 0 && ipsec_gethist(m, NULL))
+ if (ipsec_bypass == 0 && ipsec_gethist(m, NULL)) {
goto pass;
+ }
#endif
#if IPFIREWALL
* If we've been forwarded from the output side, then
* skip the firewall a second time
*/
- if (args.fwa_next_hop)
+ if (args.fwa_next_hop) {
goto ours;
-#endif /* IPFIREWALL_FORWARD */
+ }
+#endif /* IPFIREWALL_FORWARD */
args.fwa_m = m;
m = args.fwa_m;
if ((i & IP_FW_PORT_DENY_FLAG) || m == NULL) { /* drop */
- if (m)
+ if (m) {
m_freem(m);
+ }
return;
}
ip = mtod(m, struct ip *); /* just in case m changed */
#if DUMMYNET
if (DUMMYNET_LOADED && (i & IP_FW_PORT_DYNT_FLAG) != 0) {
/* Send packet to the appropriate pipe */
- ip_dn_io_ptr(m, i&0xffff, DN_TO_IP_IN, &args,
+ ip_dn_io_ptr(m, i & 0xffff, DN_TO_IP_IN, &args,
DN_CLIENT_IPFW);
return;
}
* error was detected (causing an icmp message
* to be sent and the original packet to be freed).
*/
- ip_nhops = 0; /* for source routed packets */
+ ip_nhops = 0; /* for source routed packets */
#if IPFIREWALL
- if (hlen > sizeof (struct ip) &&
+ if (hlen > sizeof(struct ip) &&
ip_dooptions(m, 0, args.fwa_next_hop)) {
#else /* !IPFIREWALL */
- if (hlen > sizeof (struct ip) && ip_dooptions(m, 0, NULL)) {
+ if (hlen > sizeof(struct ip) && ip_dooptions(m, 0, NULL)) {
#endif /* !IPFIREWALL */
return;
}
-#if MROUTING
- /*
- * greedy RSVP, snatches any PATH packet of the RSVP protocol and no
- * matter if it is destined to another node, or whether it is
- * a multicast one, RSVP wants it! and prevents it from being forwarded
- * anywhere else. Also checks if the rsvp daemon is running before
- * grabbing the packet.
- */
- if (rsvp_on && ip->ip_p == IPPROTO_RSVP) {
- ip_setdstifaddr_info(m, inifp->if_index, NULL);
- goto ours;
- }
-#endif /* MROUTING */
-
/*
* Check our list of addresses, to see if the packet is for us.
* If we don't have any addresses, assume any unicast packet
* we receive might be for us (and let the upper layers deal
* with it).
*/
- if (TAILQ_EMPTY(&in_ifaddrhead) && !(m->m_flags & (M_MCAST|M_BCAST))) {
+ if (TAILQ_EMPTY(&in_ifaddrhead) && !(m->m_flags & (M_MCAST | M_BCAST))) {
ip_setdstifaddr_info(m, inifp->if_index, NULL);
goto ours;
}
#if IPFIREWALL
&& (args.fwa_next_hop == NULL);
#else /* !IPFIREWALL */
- ;
+ ;
#endif /* !IPFIREWALL */
/*
if (IN_MULTICAST(ntohl(ip->ip_dst.s_addr))) {
struct in_multi *inm;
-#if MROUTING
- if (ip_mrouter) {
- /*
- * If we are acting as a multicast router, all
- * incoming multicast packets are passed to the
- * kernel-level multicast forwarding function.
- * The packet is returned (relatively) intact; if
- * ip_mforward() returns a non-zero value, the packet
- * must be discarded, else it may be accepted below.
- */
- if (ip_mforward && ip_mforward(ip, inifp, m, 0) != 0) {
- OSAddAtomic(1, &ipstat.ips_cantforward);
- m_freem(m);
- return;
- }
-
- /*
- * The process-level routing daemon needs to receive
- * all multicast IGMP packets, whether or not this
- * host belongs to their destination groups.
- */
- if (ip->ip_p == IPPROTO_IGMP) {
- ip_setdstifaddr_info(m, inifp->if_index, NULL);
- goto ours;
- }
- OSAddAtomic(1, &ipstat.ips_forward);
- }
-#endif /* MROUTING */
/*
* See if we belong to the destination multicast group on the
* arrival interface.
/* Allow DHCP/BootP responses through */
if ((inifp->if_eflags & IFEF_AUTOCONFIGURING) &&
- hlen == sizeof (struct ip) && ip->ip_p == IPPROTO_UDP) {
+ hlen == sizeof(struct ip) && ip->ip_p == IPPROTO_UDP) {
struct udpiphdr *ui;
- if (m->m_len < sizeof (struct udpiphdr) &&
- (m = m_pullup(m, sizeof (struct udpiphdr))) == NULL) {
+ if (m->m_len < sizeof(struct udpiphdr) &&
+ (m = m_pullup(m, sizeof(struct udpiphdr))) == NULL) {
OSAddAtomic(1, &udpstat.udps_hdrops);
return;
}
#else
m = ip_reass(m);
#endif
- if (m == NULL)
+ if (m == NULL) {
return;
+ }
ip = mtod(m, struct ip *);
/* Get the header length of the reassembled packet */
hlen = IP_VHL_HL(ip->ip_vhl) << 2;
struct mbuf *clone = NULL;
/* Clone packet if we're doing a 'tee' */
- if (div_info & IP_FW_PORT_TEE_FLAG)
+ if (div_info & IP_FW_PORT_TEE_FLAG) {
clone = m_dup(m, M_DONTWAIT);
+ }
/* Restore packet header fields to original values */
ip->ip_len += hlen;
struct ip_fwd_tag *ipfwd_tag;
fwd_tag = m_tag_create(KERNEL_MODULE_TAG_ID,
- KERNEL_TAG_TYPE_IPFORWARD, sizeof (*ipfwd_tag),
+ KERNEL_TAG_TYPE_IPFORWARD, sizeof(*ipfwd_tag),
M_NOWAIT, m);
- if (fwd_tag == NULL)
+ if (fwd_tag == NULL) {
goto bad;
+ }
- ipfwd_tag = (struct ip_fwd_tag *)(fwd_tag+1);
+ ipfwd_tag = (struct ip_fwd_tag *)(fwd_tag + 1);
ipfwd_tag->next_hop = args.fwa_next_hop;
m_tag_prepend(m, fwd_tag);
if ((sw_lro) && (ip->ip_p == IPPROTO_TCP)) {
m = tcp_lro(m, hlen);
- if (m == NULL)
+ if (m == NULL) {
return;
+ }
}
ip_proto_dispatch_in(m, hlen, ip->ip_p, 0);
#else /* !IPFIREWALL */
if ((sw_lro) && (ip->ip_p == IPPROTO_TCP)) {
m = tcp_lro(m, hlen);
- if (m == NULL)
+ if (m == NULL) {
return;
+ }
}
ip_proto_dispatch_in(m, hlen, ip->ip_p, 0);
#endif /* !IPFIREWALL */
static void
ipq_updateparams(void)
{
- lck_mtx_assert(&ipqlock, LCK_MTX_ASSERT_OWNED);
+ LCK_MTX_ASSERT(&ipqlock, LCK_MTX_ASSERT_OWNED);
/*
* -1 for unlimited allocation.
*/
- if (maxnipq < 0)
+ if (maxnipq < 0) {
ipq_limit = 0;
+ }
/*
* Positive number for specific bound.
*/
- if (maxnipq > 0)
+ if (maxnipq > 0) {
ipq_limit = maxnipq;
+ }
/*
* Zero specifies no further fragment queue allocation -- set the
* bound very low, but rely on implementation elsewhere to actually
* prevent allocation and reclaim current queues.
*/
- if (maxnipq == 0)
+ if (maxnipq == 0) {
ipq_limit = 1;
+ }
/*
* Arm the purge timer if not already and if there's work to do
*/
lck_mtx_lock(&ipqlock);
i = maxnipq;
error = sysctl_handle_int(oidp, &i, 0, req);
- if (error || req->newptr == USER_ADDR_NULL)
+ if (error || req->newptr == USER_ADDR_NULL) {
goto done;
+ }
/* impose bounds */
if (i < -1 || i > (nmbclusters / 4)) {
error = EINVAL;
ipq_updateparams();
done:
lck_mtx_unlock(&ipqlock);
- return (error);
+ return error;
}
static int
lck_mtx_lock(&ipqlock);
i = maxfragsperpacket;
error = sysctl_handle_int(oidp, &i, 0, req);
- if (error || req->newptr == USER_ADDR_NULL)
+ if (error || req->newptr == USER_ADDR_NULL) {
goto done;
+ }
maxfragsperpacket = i;
- ipq_updateparams(); /* see if we need to arm timer */
+ ipq_updateparams(); /* see if we need to arm timer */
done:
lck_mtx_unlock(&ipqlock);
- return (error);
+ return error;
}
/*
* When IPDIVERT enabled, keep additional state with each packet that
* tells us if we need to divert or tee the packet we're building.
*
- * The IP header is *NOT* adjusted out of iplen.
+ * The IP header is *NOT* adjusted out of iplen (but in host byte order).
*/
static struct mbuf *
#if IPDIVERT
uint16_t hash;
struct fq_head dfq;
- MBUFQ_INIT(&dfq); /* for deferred frees */
+ MBUFQ_INIT(&dfq); /* for deferred frees */
/* If maxnipq or maxfragsperpacket is 0, never accept fragments. */
if (maxnipq == 0 || maxfragsperpacket == 0) {
m_freem(m);
if (nipq > 0) {
lck_mtx_lock(&ipqlock);
- frag_sched_timeout(); /* purge stale fragments */
+ frag_sched_timeout(); /* purge stale fragments */
lck_mtx_unlock(&ipqlock);
}
- return (NULL);
+ return NULL;
}
ip = mtod(m, struct ip *);
#if CONFIG_MACF_NET
mac_ipq_label_compare(m, fp) &&
#endif
- ip->ip_p == fp->ipq_p)
+ ip->ip_p == fp->ipq_p) {
goto found;
+ }
}
fp = NULL;
*
* Perform 1's complement adjustment of octets that got included/
* excluded in the hardware-calculated checksum value. Ignore cases
- * where the value includes or excludes the IP header span, as the
- * sum for those octets would already be 0xffff and thus no-op.
+ * where the value includes the entire IPv4 header span, as the sum
+ * for those octets would already be 0 by the time we get here; IP
+ * has already performed its header checksum validation. Also take
+ * care of any trailing bytes and subtract out their partial sum.
*/
- if (ip->ip_p == IPPROTO_UDP && hlen == sizeof (struct ip) &&
+ if (ip->ip_p == IPPROTO_UDP && hlen == sizeof(struct ip) &&
(m->m_pkthdr.csum_flags &
(CSUM_DATA_VALID | CSUM_PARTIAL | CSUM_PSEUDO_HDR)) ==
(CSUM_DATA_VALID | CSUM_PARTIAL)) {
- uint32_t start;
+ uint32_t start = m->m_pkthdr.csum_rx_start;
+ int32_t trailer = (m_pktlen(m) - ip->ip_len);
+ uint32_t swbytes = (uint32_t)trailer;
- start = m->m_pkthdr.csum_rx_start;
csum = m->m_pkthdr.csum_rx_val;
- if (start != 0 && start != hlen) {
+ ASSERT(trailer >= 0);
+ if ((start != 0 && start != hlen) || trailer != 0) {
#if BYTE_ORDER != BIG_ENDIAN
if (start < hlen) {
HTONS(ip->ip_len);
HTONS(ip->ip_off);
}
-#endif
+#endif /* BYTE_ORDER != BIG_ENDIAN */
/* callee folds in sum */
- csum = m_adj_sum16(m, start, hlen, csum);
+ csum = m_adj_sum16(m, start, hlen,
+ (ip->ip_len - hlen), csum);
+ if (hlen > start) {
+ swbytes += (hlen - start);
+ } else {
+ swbytes += (start - hlen);
+ }
#if BYTE_ORDER != BIG_ENDIAN
if (start < hlen) {
NTOHS(ip->ip_off);
NTOHS(ip->ip_len);
}
-#endif
+#endif /* BYTE_ORDER != BIG_ENDIAN */
}
csum_flags = m->m_pkthdr.csum_flags;
+
+ if (swbytes != 0) {
+ udp_in_cksum_stats(swbytes);
+ }
+ if (trailer != 0) {
+ m_adj(m, -trailer);
+ }
} else {
csum = 0;
csum_flags = 0;
*/
if (fp == NULL) {
fp = ipq_alloc(M_DONTWAIT);
- if (fp == NULL)
+ if (fp == NULL) {
goto dropfrag;
+ }
#if CONFIG_MACF_NET
if (mac_ipq_label_init(fp, M_NOWAIT) != 0) {
ipq_free(fp);
*divinfo = 0;
*divcookie = 0;
#endif /* IPDIVERT */
- m = NULL; /* nothing to return */
+ m = NULL; /* nothing to return */
goto done;
} else {
fp->ipq_nfrags++;
#endif
}
-#define GETIP(m) ((struct ip *)((m)->m_pkthdr.pkt_hdr))
+#define GETIP(m) ((struct ip *)((m)->m_pkthdr.pkt_hdr))
/*
* Handle ECN by comparing this segment with the first one;
ecn = ip->ip_tos & IPTOS_ECN_MASK;
ecn0 = GETIP(fp->ipq_frags)->ip_tos & IPTOS_ECN_MASK;
if (ecn == IPTOS_ECN_CE) {
- if (ecn0 == IPTOS_ECN_NOTECT)
+ if (ecn0 == IPTOS_ECN_NOTECT) {
goto dropfrag;
- if (ecn0 != IPTOS_ECN_CE)
+ }
+ if (ecn0 != IPTOS_ECN_CE) {
GETIP(fp->ipq_frags)->ip_tos |= IPTOS_ECN_CE;
+ }
}
- if (ecn == IPTOS_ECN_NOTECT && ecn0 != IPTOS_ECN_NOTECT)
+ if (ecn == IPTOS_ECN_NOTECT && ecn0 != IPTOS_ECN_NOTECT) {
goto dropfrag;
+ }
/*
* Find a segment which begins after this one does.
*/
- for (p = NULL, q = fp->ipq_frags; q; p = q, q = q->m_nextpkt)
- if (GETIP(q)->ip_off > ip->ip_off)
+ for (p = NULL, q = fp->ipq_frags; q; p = q, q = q->m_nextpkt) {
+ if (GETIP(q)->ip_off > ip->ip_off) {
break;
+ }
+ }
/*
* If there is a preceding segment, it may provide some of
if (p) {
i = GETIP(p)->ip_off + GETIP(p)->ip_len - ip->ip_off;
if (i > 0) {
- if (i >= ip->ip_len)
+ if (i >= ip->ip_len) {
goto dropfrag;
+ }
m_adj(m, i);
fp->ipq_csum_flags = 0;
ip->ip_off += i;
* as that of the existing ones, accumulate checksum. Otherwise,
* invalidate checksum offload info for the entire datagram.
*/
- if (csum_flags != 0 && csum_flags == fp->ipq_csum_flags)
+ if (csum_flags != 0 && csum_flags == fp->ipq_csum_flags) {
fp->ipq_csum += csum;
- else if (fp->ipq_csum_flags != 0)
+ } else if (fp->ipq_csum_flags != 0) {
fp->ipq_csum_flags = 0;
+ }
#if IPDIVERT
/*
ipstat.ips_fragdropped += fp->ipq_nfrags;
frag_freef(head, fp);
}
- m = NULL; /* nothing to return */
+ m = NULL; /* nothing to return */
goto done;
}
next += GETIP(q)->ip_len;
ipstat.ips_fragdropped += fp->ipq_nfrags;
frag_freef(head, fp);
}
- m = NULL; /* nothing to return */
+ m = NULL; /* nothing to return */
goto done;
}
ipstat.ips_toolong++;
ipstat.ips_fragdropped += fp->ipq_nfrags;
frag_freef(head, fp);
- m = NULL; /* nothing to return */
+ m = NULL; /* nothing to return */
goto done;
}
ADDCARRY(csum);
m->m_pkthdr.csum_rx_val = csum;
- m->m_pkthdr.csum_rx_start = sizeof (struct ip);
+ m->m_pkthdr.csum_rx_start = sizeof(struct ip);
m->m_pkthdr.csum_flags = fp->ipq_csum_flags;
} else if ((m->m_pkthdr.rcvif->if_flags & IFF_LOOPBACK) ||
(m->m_pkthdr.pkt_flags & PKTF_LOOP)) {
ip->ip_src = fp->ipq_src;
ip->ip_dst = fp->ipq_dst;
- fp->ipq_frags = NULL; /* return to caller as 'm' */
+ fp->ipq_frags = NULL; /* return to caller as 'm' */
frag_freef(head, fp);
fp = NULL;
m->m_len += (IP_VHL_HL(ip->ip_vhl) << 2);
m->m_data -= (IP_VHL_HL(ip->ip_vhl) << 2);
/* some debugging cruft by sklower, below, will go away soon */
- if (m->m_flags & M_PKTHDR) /* XXX this should be done elsewhere */
+ if (m->m_flags & M_PKTHDR) { /* XXX this should be done elsewhere */
m_fixhdr(m);
+ }
ipstat.ips_reassembled++;
/* arm the purge timer if not already and if there's work to do */
frag_sched_timeout();
lck_mtx_unlock(&ipqlock);
/* perform deferred free (if needed) now that lock is dropped */
- if (!MBUFQ_EMPTY(&dfq))
+ if (!MBUFQ_EMPTY(&dfq)) {
MBUFQ_DRAIN(&dfq);
+ }
VERIFY(MBUFQ_EMPTY(&dfq));
- return (m);
+ return m;
done:
VERIFY(m == NULL);
frag_sched_timeout();
lck_mtx_unlock(&ipqlock);
/* perform deferred free (if needed) */
- if (!MBUFQ_EMPTY(&dfq))
+ if (!MBUFQ_EMPTY(&dfq)) {
MBUFQ_DRAIN(&dfq);
+ }
VERIFY(MBUFQ_EMPTY(&dfq));
- return (NULL);
+ return NULL;
dropfrag:
#if IPDIVERT
*divcookie = 0;
#endif /* IPDIVERT */
ipstat.ips_fragdropped++;
- if (fp != NULL)
+ if (fp != NULL) {
fp->ipq_nfrags--;
+ }
/* arm the purge timer if not already and if there's work to do */
frag_sched_timeout();
lck_mtx_unlock(&ipqlock);
m_freem(m);
/* perform deferred free (if needed) */
- if (!MBUFQ_EMPTY(&dfq))
+ if (!MBUFQ_EMPTY(&dfq)) {
MBUFQ_DRAIN(&dfq);
+ }
VERIFY(MBUFQ_EMPTY(&dfq));
- return (NULL);
+ return NULL;
#undef GETIP
}
static void
frag_freef(struct ipqhead *fhp, struct ipq *fp)
{
- lck_mtx_assert(&ipqlock, LCK_MTX_ASSERT_OWNED);
+ LCK_MTX_ASSERT(&ipqlock, LCK_MTX_ASSERT_OWNED);
fp->ipq_nfrags = 0;
if (fp->ipq_frags != NULL) {
lck_mtx_lock(&ipqlock);
for (i = 0; i < IPREASS_NHASH; i++) {
- for (fp = TAILQ_FIRST(&ipq[i]); fp; ) {
+ for (fp = TAILQ_FIRST(&ipq[i]); fp;) {
struct ipq *fpp;
fpp = fp;
static void
frag_sched_timeout(void)
{
- lck_mtx_assert(&ipqlock, LCK_MTX_ASSERT_OWNED);
+ LCK_MTX_ASSERT(&ipqlock, LCK_MTX_ASSERT_OWNED);
if (!frag_timeout_run && nipq > 0) {
frag_timeout_run = 1;
* from nipq since the latter represents the elements already
* in the reassembly queues.
*/
- if (ipq_limit > 0 && ipq_count > ipq_limit)
- return (NULL);
+ if (ipq_limit > 0 && ipq_count > ipq_limit) {
+ return NULL;
+ }
t = m_get(how, MT_FTABLE);
if (t != NULL) {
atomic_add_32(&ipq_count, 1);
fp = mtod(t, struct ipq *);
- bzero(fp, sizeof (*fp));
+ bzero(fp, sizeof(*fp));
} else {
fp = NULL;
}
- return (fp);
+ return fp;
}
static void
void
ip_drain(void)
{
- frag_drain(); /* fragments */
- in_rtqdrain(); /* protocol cloned routes */
- in_arpdrain(NULL); /* cloned routes: ARP */
+ frag_drain(); /* fragments */
+ in_rtqdrain(); /* protocol cloned routes */
+ in_arpdrain(NULL); /* cloned routes: ARP */
}
/*
struct in_ifaddr *ia;
int opt, optlen, cnt, off, code, type = ICMP_PARAMPROB, forward = 0;
struct in_addr *sin, dst;
- n_time ntime;
+ u_int32_t ntime;
struct sockaddr_in ipaddr = {
- sizeof (ipaddr), AF_INET, 0, { 0 }, { 0, } };
+ sizeof(ipaddr), AF_INET, 0, { 0 }, { 0, }
+ };
/* Expect 32-bit aligned data pointer on strict-align platforms */
MBUF_STRICT_DATA_ALIGNMENT_CHECK_32(m);
dst = ip->ip_dst;
cp = (u_char *)(ip + 1);
- cnt = (IP_VHL_HL(ip->ip_vhl) << 2) - sizeof (struct ip);
+ cnt = (IP_VHL_HL(ip->ip_vhl) << 2) - sizeof(struct ip);
for (; cnt > 0; cnt -= optlen, cp += optlen) {
opt = cp[IPOPT_OPTVAL];
- if (opt == IPOPT_EOL)
+ if (opt == IPOPT_EOL) {
break;
- if (opt == IPOPT_NOP)
+ }
+ if (opt == IPOPT_NOP) {
optlen = 1;
- else {
- if (cnt < IPOPT_OLEN + sizeof (*cp)) {
+ } else {
+ if (cnt < IPOPT_OLEN + sizeof(*cp)) {
code = &cp[IPOPT_OLEN] - (u_char *)ip;
goto bad;
}
optlen = cp[IPOPT_OLEN];
- if (optlen < IPOPT_OLEN + sizeof (*cp) ||
+ if (optlen < IPOPT_OLEN + sizeof(*cp) ||
optlen > cnt) {
code = &cp[IPOPT_OLEN] - (u_char *)ip;
goto bad;
}
}
switch (opt) {
-
default:
break;
*/
case IPOPT_LSRR:
case IPOPT_SSRR:
- if (optlen < IPOPT_OFFSET + sizeof (*cp)) {
+ if (optlen < IPOPT_OFFSET + sizeof(*cp)) {
code = &cp[IPOPT_OLEN] - (u_char *)ip;
goto bad;
}
code = ICMP_UNREACH_SRCFAIL;
goto bad;
}
- if (!ip_dosourceroute)
+ if (!ip_dosourceroute) {
goto nosourcerouting;
+ }
/*
* Loose routing, and not at next destination
* yet; nothing to do except forward.
IFA_REMREF(&ia->ia_ifa);
ia = NULL;
}
- off--; /* 0 origin */
- if (off > optlen - (int)sizeof (struct in_addr)) {
+ off--; /* 0 origin */
+ if (off > optlen - (int)sizeof(struct in_addr)) {
/*
* End of source route. Should be for us.
*/
- if (!ip_acceptsourceroute)
+ if (!ip_acceptsourceroute) {
goto nosourcerouting;
+ }
save_rte(cp, ip->ip_src);
break;
}
"attempted source route from %s "
"to %s\n",
inet_ntop(AF_INET, &ip->ip_src,
- buf, sizeof (buf)),
+ buf, sizeof(buf)),
inet_ntop(AF_INET, &ip->ip_dst,
- buf2, sizeof (buf2)));
+ buf2, sizeof(buf2)));
type = ICMP_UNREACH;
code = ICMP_UNREACH_SRCFAIL;
goto bad;
*/
OSAddAtomic(1, &ipstat.ips_cantforward);
m_freem(m);
- return (1);
+ return 1;
}
}
* locate outgoing interface
*/
(void) memcpy(&ipaddr.sin_addr, cp + off,
- sizeof (ipaddr.sin_addr));
+ sizeof(ipaddr.sin_addr));
if (opt == IPOPT_SSRR) {
-#define INA struct in_ifaddr *
+#define INA struct in_ifaddr *
if ((ia = (INA)ifa_ifwithdstaddr(
- SA(&ipaddr))) == NULL) {
+ SA(&ipaddr))) == NULL) {
ia = (INA)ifa_ifwithnet(SA(&ipaddr));
}
} else {
ip->ip_dst = ipaddr.sin_addr;
IFA_LOCK(&ia->ia_ifa);
(void) memcpy(cp + off, &(IA_SIN(ia)->sin_addr),
- sizeof (struct in_addr));
+ sizeof(struct in_addr));
IFA_UNLOCK(&ia->ia_ifa);
IFA_REMREF(&ia->ia_ifa);
ia = NULL;
- cp[IPOPT_OFFSET] += sizeof (struct in_addr);
+ cp[IPOPT_OFFSET] += sizeof(struct in_addr);
/*
* Let ip_intr's mcast routing check handle mcast pkts
*/
break;
case IPOPT_RR:
- if (optlen < IPOPT_OFFSET + sizeof (*cp)) {
+ if (optlen < IPOPT_OFFSET + sizeof(*cp)) {
code = &cp[IPOPT_OFFSET] - (u_char *)ip;
goto bad;
}
/*
* If no space remains, ignore.
*/
- off--; /* 0 origin */
- if (off > optlen - (int)sizeof (struct in_addr))
+ off--; /* 0 origin */
+ if (off > optlen - (int)sizeof(struct in_addr)) {
break;
+ }
(void) memcpy(&ipaddr.sin_addr, &ip->ip_dst,
- sizeof (ipaddr.sin_addr));
+ sizeof(ipaddr.sin_addr));
/*
* locate outgoing interface; if we're the destination,
* use the incoming interface (should be same).
}
IFA_LOCK(&ia->ia_ifa);
(void) memcpy(cp + off, &(IA_SIN(ia)->sin_addr),
- sizeof (struct in_addr));
+ sizeof(struct in_addr));
IFA_UNLOCK(&ia->ia_ifa);
IFA_REMREF(&ia->ia_ifa);
ia = NULL;
- cp[IPOPT_OFFSET] += sizeof (struct in_addr);
+ cp[IPOPT_OFFSET] += sizeof(struct in_addr);
break;
case IPOPT_TS:
goto bad;
}
if (ipt->ipt_ptr >
- ipt->ipt_len - (int)sizeof (int32_t)) {
+ ipt->ipt_len - (int)sizeof(int32_t)) {
if (++ipt->ipt_oflw == 0) {
code = (u_char *)&ipt->ipt_ptr -
(u_char *)ip;
}
sin = (struct in_addr *)(void *)(cp + ipt->ipt_ptr - 1);
switch (ipt->ipt_flg) {
-
case IPOPT_TS_TSONLY:
break;
case IPOPT_TS_TSANDADDR:
- if (ipt->ipt_ptr - 1 + sizeof (n_time) +
- sizeof (struct in_addr) > ipt->ipt_len) {
+ if (ipt->ipt_ptr - 1 + sizeof(n_time) +
+ sizeof(struct in_addr) > ipt->ipt_len) {
code = (u_char *)&ipt->ipt_ptr -
(u_char *)ip;
goto bad;
ipaddr.sin_addr = dst;
ia = (INA)ifaof_ifpforaddr(SA(&ipaddr),
m->m_pkthdr.rcvif);
- if (ia == NULL)
+ if (ia == NULL) {
continue;
+ }
IFA_LOCK(&ia->ia_ifa);
(void) memcpy(sin, &IA_SIN(ia)->sin_addr,
- sizeof (struct in_addr));
+ sizeof(struct in_addr));
IFA_UNLOCK(&ia->ia_ifa);
- ipt->ipt_ptr += sizeof (struct in_addr);
+ ipt->ipt_ptr += sizeof(struct in_addr);
IFA_REMREF(&ia->ia_ifa);
ia = NULL;
break;
case IPOPT_TS_PRESPEC:
- if (ipt->ipt_ptr - 1 + sizeof (n_time) +
- sizeof (struct in_addr) > ipt->ipt_len) {
+ if (ipt->ipt_ptr - 1 + sizeof(n_time) +
+ sizeof(struct in_addr) > ipt->ipt_len) {
code = (u_char *)&ipt->ipt_ptr -
(u_char *)ip;
goto bad;
}
(void) memcpy(&ipaddr.sin_addr, sin,
- sizeof (struct in_addr));
+ sizeof(struct in_addr));
if ((ia = (struct in_ifaddr *)ifa_ifwithaddr(
- SA(&ipaddr))) == NULL)
+ SA(&ipaddr))) == NULL) {
continue;
+ }
IFA_REMREF(&ia->ia_ifa);
ia = NULL;
- ipt->ipt_ptr += sizeof (struct in_addr);
+ ipt->ipt_ptr += sizeof(struct in_addr);
break;
default:
}
ntime = iptime();
(void) memcpy(cp + ipt->ipt_ptr - 1, &ntime,
- sizeof (n_time));
- ipt->ipt_ptr += sizeof (n_time);
+ sizeof(n_time));
+ ipt->ipt_ptr += sizeof(n_time);
}
}
if (forward && ipforwarding) {
ip_forward(m, 1, next_hop);
- return (1);
+ return 1;
}
- return (0);
+ return 0;
bad:
- /* XXX icmp_error adds in hdr length */
- ip->ip_len -= IP_VHL_HL(ip->ip_vhl) << 2;
icmp_error(m, type, code, 0, 0);
OSAddAtomic(1, &ipstat.ips_badoptions);
- return (1);
+ return 1;
}
/*
found_ra = 0;
cp = (u_char *)(ip + 1);
- cnt = (IP_VHL_HL(ip->ip_vhl) << 2) - sizeof (struct ip);
+ cnt = (IP_VHL_HL(ip->ip_vhl) << 2) - sizeof(struct ip);
for (; cnt > 0; cnt -= optlen, cp += optlen) {
opt = cp[IPOPT_OPTVAL];
- if (opt == IPOPT_EOL)
+ if (opt == IPOPT_EOL) {
break;
- if (opt == IPOPT_NOP)
+ }
+ if (opt == IPOPT_NOP) {
optlen = 1;
- else {
+ } else {
#ifdef DIAGNOSTIC
- if (cnt < IPOPT_OLEN + sizeof (*cp))
+ if (cnt < IPOPT_OLEN + sizeof(*cp)) {
break;
+ }
#endif
optlen = cp[IPOPT_OLEN];
#ifdef DIAGNOSTIC
- if (optlen < IPOPT_OLEN + sizeof (*cp) || optlen > cnt)
+ if (optlen < IPOPT_OLEN + sizeof(*cp) || optlen > cnt) {
break;
+ }
#endif
}
switch (opt) {
case IPOPT_RA:
#ifdef DIAGNOSTIC
- if (optlen != IPOPT_OFFSET + sizeof (uint16_t) ||
- (*((uint16_t *)(void *)&cp[IPOPT_OFFSET]) != 0))
+ if (optlen != IPOPT_OFFSET + sizeof(uint16_t) ||
+ (*((uint16_t *)(void *)&cp[IPOPT_OFFSET]) != 0)) {
break;
- else
+ } else
#endif
- found_ra = 1;
+ found_ra = 1;
break;
default:
break;
}
}
- return (found_ra);
+ return found_ra;
}
/*
struct ifaddr *rt_ifa;
struct route ro;
- bzero(&ro, sizeof (ro));
+ bzero(&ro, sizeof(ro));
sin = SIN(&ro.ro_dst);
sin->sin_family = AF_INET;
- sin->sin_len = sizeof (*sin);
+ sin->sin_len = sizeof(*sin);
sin->sin_addr = dst;
rtalloc_ign(&ro, RTF_PRCLONING);
if (ro.ro_rt == NULL) {
ROUTE_RELEASE(&ro);
- return (NULL);
+ return NULL;
}
RT_LOCK(ro.ro_rt);
- if ((rt_ifa = ro.ro_rt->rt_ifa) != NULL)
+ if ((rt_ifa = ro.ro_rt->rt_ifa) != NULL) {
IFA_ADDREF(rt_ifa);
+ }
RT_UNLOCK(ro.ro_rt);
ROUTE_RELEASE(&ro);
- return ((struct in_ifaddr *)rt_ifa);
+ return (struct in_ifaddr *)rt_ifa;
}
/*
olen = option[IPOPT_OLEN];
#if DIAGNOSTIC
- if (ipprintfs)
+ if (ipprintfs) {
printf("save_rte: olen %d\n", olen);
+ }
#endif
- if (olen > sizeof (ip_srcrt) - (1 + sizeof (dst)))
+ if (olen > sizeof(ip_srcrt) - (1 + sizeof(dst))) {
return;
+ }
bcopy(option, ip_srcrt.srcopt, olen);
- ip_nhops = (olen - IPOPT_OFFSET - 1) / sizeof (struct in_addr);
+ ip_nhops = (olen - IPOPT_OFFSET - 1) / sizeof(struct in_addr);
ip_srcrt.dst = dst;
}
struct in_addr *p, *q;
struct mbuf *m;
- if (ip_nhops == 0)
- return (NULL);
+ if (ip_nhops == 0) {
+ return NULL;
+ }
m = m_get(M_DONTWAIT, MT_HEADER);
- if (m == NULL)
- return (NULL);
+ if (m == NULL) {
+ return NULL;
+ }
-#define OPTSIZ (sizeof (ip_srcrt.nop) + sizeof (ip_srcrt.srcopt))
+#define OPTSIZ (sizeof (ip_srcrt.nop) + sizeof (ip_srcrt.srcopt))
/* length is (nhops+1)*sizeof(addr) + sizeof(nop + srcrt header) */
- m->m_len = ip_nhops * sizeof (struct in_addr) +
- sizeof (struct in_addr) + OPTSIZ;
+ m->m_len = ip_nhops * sizeof(struct in_addr) +
+ sizeof(struct in_addr) + OPTSIZ;
#if DIAGNOSTIC
- if (ipprintfs)
+ if (ipprintfs) {
printf("ip_srcroute: nhops %d mlen %d", ip_nhops, m->m_len);
+ }
#endif
/*
p = &ip_srcrt.route[ip_nhops - 1];
*(mtod(m, struct in_addr *)) = *p--;
#if DIAGNOSTIC
- if (ipprintfs)
+ if (ipprintfs) {
printf(" hops %lx",
(u_int32_t)ntohl(mtod(m, struct in_addr *)->s_addr));
+ }
#endif
/*
*/
ip_srcrt.nop = IPOPT_NOP;
ip_srcrt.srcopt[IPOPT_OFFSET] = IPOPT_MINOFF;
- (void) memcpy(mtod(m, caddr_t) + sizeof (struct in_addr),
+ (void) memcpy(mtod(m, caddr_t) + sizeof(struct in_addr),
&ip_srcrt.nop, OPTSIZ);
q = (struct in_addr *)(void *)(mtod(m, caddr_t) +
- sizeof (struct in_addr) + OPTSIZ);
+ sizeof(struct in_addr) + OPTSIZ);
#undef OPTSIZ
/*
* Record return path as an IP source route,
*/
while (p >= ip_srcrt.route) {
#if DIAGNOSTIC
- if (ipprintfs)
+ if (ipprintfs) {
printf(" %lx", (u_int32_t)ntohl(q->s_addr));
+ }
#endif
*q++ = *p--;
}
*/
*q = ip_srcrt.dst;
#if DIAGNOSTIC
- if (ipprintfs)
+ if (ipprintfs) {
printf(" %lx\n", (u_int32_t)ntohl(q->s_addr));
+ }
#endif
- return (m);
+ return m;
}
/*
- * Strip out IP options, at higher
- * level protocol in the kernel.
- * Second argument is buffer to which options
- * will be moved, and return value is their length.
- * XXX should be deleted; last arg currently ignored.
+ * Strip out IP options, at higher level protocol in the kernel.
*/
void
-ip_stripoptions(struct mbuf *m, struct mbuf *mopt)
+ip_stripoptions(struct mbuf *m)
{
-#pragma unused(mopt)
int i;
struct ip *ip = mtod(m, struct ip *);
caddr_t opts;
/* Expect 32-bit aligned data pointer on strict-align platforms */
MBUF_STRICT_DATA_ALIGNMENT_CHECK_32(m);
- olen = (IP_VHL_HL(ip->ip_vhl) << 2) - sizeof (struct ip);
+ /* use bcopy() since it supports overlapping range */
+ olen = (IP_VHL_HL(ip->ip_vhl) << 2) - sizeof(struct ip);
opts = (caddr_t)(ip + 1);
- i = m->m_len - (sizeof (struct ip) + olen);
+ i = m->m_len - (sizeof(struct ip) + olen);
bcopy(opts + olen, opts, (unsigned)i);
m->m_len -= olen;
- if (m->m_flags & M_PKTHDR)
+ if (m->m_flags & M_PKTHDR) {
m->m_pkthdr.len -= olen;
- ip->ip_vhl = IP_MAKE_VHL(IPVERSION, sizeof (struct ip) >> 2);
+ }
+ ip->ip_vhl = IP_MAKE_VHL(IPVERSION, sizeof(struct ip) >> 2);
+
+ /*
+ * We expect ip_{off,len} to be in host order by now, and
+ * that the original IP header length has been subtracted
+ * out from ip_len. Temporarily adjust ip_len for checksum
+ * recalculation, and restore it afterwards.
+ */
+ ip->ip_len += sizeof(struct ip);
+
+ /* recompute checksum now that IP header is smaller */
+#if BYTE_ORDER != BIG_ENDIAN
+ HTONS(ip->ip_len);
+ HTONS(ip->ip_off);
+#endif /* BYTE_ORDER != BIG_ENDIAN */
+ ip->ip_sum = in_cksum_hdr(ip);
+#if BYTE_ORDER != BIG_ENDIAN
+ NTOHS(ip->ip_off);
+ NTOHS(ip->ip_len);
+#endif /* BYTE_ORDER != BIG_ENDIAN */
+
+ ip->ip_len -= sizeof(struct ip);
}
u_char inetctlerrmap[PRC_NCMDS] = {
- 0, 0, 0, 0,
- 0, EMSGSIZE, EHOSTDOWN, EHOSTUNREACH,
- ENETUNREACH, EHOSTUNREACH, ECONNREFUSED, ECONNREFUSED,
- EMSGSIZE, EHOSTUNREACH, 0, 0,
- 0, 0, 0, 0,
- ENOPROTOOPT, ECONNREFUSED
+ 0, 0, 0, 0,
+ 0, EMSGSIZE, EHOSTDOWN, EHOSTUNREACH,
+ ENETUNREACH, EHOSTUNREACH, ECONNREFUSED, ECONNREFUSED,
+ EMSGSIZE, EHOSTUNREACH, 0, 0,
+ 0, 0, 0, 0,
+ ENOPROTOOPT, ECONNREFUSED
};
static int
int i, was_ipforwarding = ipforwarding;
i = sysctl_handle_int(oidp, oidp->oid_arg1, oidp->oid_arg2, req);
- if (i != 0 || req->newptr == USER_ADDR_NULL)
- return (i);
+ if (i != 0 || req->newptr == USER_ADDR_NULL) {
+ return i;
+ }
if (was_ipforwarding && !ipforwarding) {
/* clean up IPv4 forwarding cached routes */
lck_mtx_lock(&ifp->if_cached_route_lock);
ROUTE_RELEASE(&ifp->if_fwd_route);
bzero(&ifp->if_fwd_route,
- sizeof (ifp->if_fwd_route));
+ sizeof(ifp->if_fwd_route));
lck_mtx_unlock(&ifp->if_cached_route_lock);
}
}
ifnet_head_done();
}
- return (0);
+ return 0;
}
/*
lck_mtx_convert_spin(&ifp->if_cached_route_lock);
/* Minor sanity check */
- if (src->ro_rt != NULL && rt_key(src->ro_rt)->sa_family != AF_INET)
+ if (src->ro_rt != NULL && rt_key(src->ro_rt)->sa_family != AF_INET) {
panic("%s: wrong or corrupted route: %p", __func__, src);
+ }
- route_copyout(dst, src, sizeof (*dst));
+ route_copyout(dst, src, sizeof(*dst));
lck_mtx_unlock(&ifp->if_cached_route_lock);
}
lck_mtx_convert_spin(&ifp->if_cached_route_lock);
/* Minor sanity check */
- if (src->ro_rt != NULL && rt_key(src->ro_rt)->sa_family != AF_INET)
+ if (src->ro_rt != NULL && rt_key(src->ro_rt)->sa_family != AF_INET) {
panic("%s: wrong or corrupted route: %p", __func__, src);
+ }
- if (ifp->if_fwd_cacheok)
- route_copyin(src, dst, sizeof (*src));
+ if (ifp->if_fwd_cacheok) {
+ route_copyin(src, dst, sizeof(*src));
+ }
lck_mtx_unlock(&ifp->if_cached_route_lock);
}
n_long dest;
struct in_addr pkt_dst;
u_int32_t nextmtu = 0, len;
- struct ip_out_args ipoa = { IFSCOPE_NONE, { 0 }, 0, 0 };
+ struct ip_out_args ipoa;
struct ifnet *rcvifp = m->m_pkthdr.rcvif;
+
+ bzero(&ipoa, sizeof(ipoa));
+ ipoa.ipoa_boundif = IFSCOPE_NONE;
+ ipoa.ipoa_sotc = SO_TC_UNSPEC;
+ ipoa.ipoa_netsvctype = _NET_SERVICE_TYPE_UNSPEC;
+
#if IPSEC
struct secpolicy *sp = NULL;
int ipsecerror;
#endif /* !IPFIREWALL */
#if DIAGNOSTIC
- if (ipprintfs)
+ if (ipprintfs) {
printf("forward: src %lx dst %lx ttl %x\n",
(u_int32_t)ip->ip_src.s_addr, (u_int32_t)pkt_dst.s_addr,
ip->ip_ttl);
+ }
#endif
- if (m->m_flags & (M_BCAST|M_MCAST) || !in_canforward(pkt_dst)) {
+ if (m->m_flags & (M_BCAST | M_MCAST) || !in_canforward(pkt_dst)) {
OSAddAtomic(1, &ipstat.ips_cantforward);
m_freem(m);
return;
#if IPSTEALTH
if (!ipstealth) {
#endif /* IPSTEALTH */
- if (ip->ip_ttl <= IPTTLDEC) {
- icmp_error(m, ICMP_TIMXCEED, ICMP_TIMXCEED_INTRANS,
- dest, 0);
- return;
- }
-#if IPSTEALTH
+ if (ip->ip_ttl <= IPTTLDEC) {
+ icmp_error(m, ICMP_TIMXCEED, ICMP_TIMXCEED_INTRANS,
+ dest, 0);
+ return;
}
+#if IPSTEALTH
+}
#endif /* IPSTEALTH */
#if PF
ROUTE_RELEASE(&fwd_rt);
sin->sin_family = AF_INET;
- sin->sin_len = sizeof (*sin);
+ sin->sin_len = sizeof(*sin);
sin->sin_addr = pkt_dst;
rtalloc_scoped_ign(&fwd_rt, RTF_PRCLONING, ipoa.ipoa_boundif);
#if IPSTEALTH
if (!ipstealth) {
#endif /* IPSTEALTH */
- ip->ip_ttl -= IPTTLDEC;
+ ip->ip_ttl -= IPTTLDEC;
#if IPSTEALTH
- }
+}
#endif /* IPSTEALTH */
/*
*/
RT_LOCK_SPIN(rt);
if (rt->rt_ifp == m->m_pkthdr.rcvif &&
- !(rt->rt_flags & (RTF_DYNAMIC|RTF_MODIFIED)) &&
+ !(rt->rt_flags & (RTF_DYNAMIC | RTF_MODIFIED)) &&
satosin(rt_key(rt))->sin_addr.s_addr != INADDR_ANY &&
ipsendredirects && !srcrt && rt->rt_ifa != NULL) {
struct in_ifaddr *ia = (struct in_ifaddr *)rt->rt_ifa;
RT_CONVERT_LOCK(rt);
IFA_LOCK_SPIN(&ia->ia_ifa);
if ((src & ia->ia_subnetmask) == ia->ia_subnet) {
- if (rt->rt_flags & RTF_GATEWAY)
+ if (rt->rt_flags & RTF_GATEWAY) {
dest = satosin(rt->rt_gateway)->sin_addr.s_addr;
- else
+ } else {
dest = pkt_dst.s_addr;
+ }
/*
* Router requirements says to only send
* host redirects.
type = ICMP_REDIRECT;
code = ICMP_REDIRECT_HOST;
#if DIAGNOSTIC
- if (ipprintfs)
+ if (ipprintfs) {
printf("redirect (%d) to %lx\n", code,
(u_int32_t)dest);
+ }
#endif
}
IFA_UNLOCK(&ia->ia_ifa);
tag = m_tag_create(KERNEL_MODULE_TAG_ID,
KERNEL_TAG_TYPE_IPFORWARD,
- sizeof (*ipfwd_tag), M_NOWAIT, m);
+ sizeof(*ipfwd_tag), M_NOWAIT, m);
if (tag == NULL) {
error = ENOBUFS;
m_freem(m);
goto done;
}
- ipfwd_tag = (struct ip_fwd_tag *)(tag+1);
+ ipfwd_tag = (struct ip_fwd_tag *)(tag + 1);
ipfwd_tag->next_hop = next_hop;
m_tag_prepend(m, tag);
goto done;
}
}
- if (mcopy == NULL)
+ if (mcopy == NULL) {
goto done;
+ }
switch (error) {
- case 0: /* forwarded, but need redirect */
+ case 0: /* forwarded, but need redirect */
/* type, code set above */
break;
- case ENETUNREACH: /* shouldn't happen, checked above */
+ case ENETUNREACH: /* shouldn't happen, checked above */
case EHOSTUNREACH:
case ENETDOWN:
case EHOSTDOWN:
break;
} else {
RT_LOCK_SPIN(rt);
- if (rt->rt_ifp != NULL)
+ if (rt->rt_ifp != NULL) {
nextmtu = rt->rt_ifp->if_mtu;
+ }
RT_UNLOCK(rt);
}
#ifdef IPSEC
- if (ipsec_bypass)
+ if (ipsec_bypass) {
break;
+ }
/*
* If the packet is routed over IPsec tunnel, tell the
sp = ipsec4_getpolicybyaddr(mcopy, IPSEC_DIR_OUTBOUND,
IP_FORWARDING, &ipsecerror);
- if (sp == NULL)
+ if (sp == NULL) {
break;
+ }
/*
* find the correct route for outer IPv4
ipsechdr = ipsec_hdrsiz(sp);
ipm = mtod(mcopy, struct ip *);
- bcopy(&sp->req->saidx, &saidx, sizeof (saidx));
+ bcopy(&sp->req->saidx, &saidx, sizeof(saidx));
saidx.mode = sp->req->saidx.mode;
saidx.reqid = sp->req->saidx.reqid;
sin = SIN(&saidx.src);
if (sin->sin_len == 0) {
- sin->sin_len = sizeof (*sin);
+ sin->sin_len = sizeof(*sin);
sin->sin_family = AF_INET;
sin->sin_port = IPSEC_PORT_ANY;
bcopy(&ipm->ip_src, &sin->sin_addr,
- sizeof (sin->sin_addr));
+ sizeof(sin->sin_addr));
}
sin = SIN(&saidx.dst);
if (sin->sin_len == 0) {
- sin->sin_len = sizeof (*sin);
+ sin->sin_len = sizeof(*sin);
sin->sin_family = AF_INET;
sin->sin_port = IPSEC_PORT_ANY;
bcopy(&ipm->ip_dst, &sin->sin_addr,
- sizeof (sin->sin_addr));
+ sizeof(sin->sin_addr));
}
sav = key_allocsa_policy(&saidx);
if (sav != NULL) {
lck_mtx_lock(sadb_mutex);
if (sav->sah != NULL) {
- ro = &sav->sah->sa_route;
+ ro = (struct route *)&sav->sah->sa_route;
if (ro->ro_rt != NULL) {
RT_LOCK(ro->ro_rt);
if (ro->ro_rt->rt_ifp != NULL) {
}
break;
- case EACCES: /* ipfw denied packet */
+ case EACCES: /* ipfw denied packet */
m_freem(mcopy);
goto done;
}
- if (type == ICMP_UNREACH && code == ICMP_UNREACH_NEEDFRAG)
+ if (type == ICMP_UNREACH && code == ICMP_UNREACH_NEEDFRAG) {
OSAddAtomic(1, &ipstat.ips_cantfrag);
+ }
icmp_error(mcopy, type, code, dest, nextmtu);
done:
struct timeval tv;
getmicrotime(&tv);
- mp = sbcreatecontrol_mbuf((caddr_t)&tv, sizeof (tv),
+ mp = sbcreatecontrol_mbuf((caddr_t)&tv, sizeof(tv),
SCM_TIMESTAMP, SOL_SOCKET, mp);
if (*mp == NULL) {
goto no_mbufs;
uint64_t time;
time = mach_absolute_time();
- mp = sbcreatecontrol_mbuf((caddr_t)&time, sizeof (time),
+ mp = sbcreatecontrol_mbuf((caddr_t)&time, sizeof(time),
SCM_TIMESTAMP_MONOTONIC, SOL_SOCKET, mp);
if (*mp == NULL) {
goto no_mbufs;
}
}
+ if (inp->inp_socket->so_options & SO_TIMESTAMP_CONTINUOUS) {
+ uint64_t time;
+
+ time = mach_continuous_time();
+ mp = sbcreatecontrol_mbuf((caddr_t)&time, sizeof(time),
+ SCM_TIMESTAMP_CONTINUOUS, SOL_SOCKET, mp);
+ if (*mp == NULL) {
+ goto no_mbufs;
+ }
+ }
if (inp->inp_flags & INP_RECVDSTADDR) {
mp = sbcreatecontrol_mbuf((caddr_t)&ip->ip_dst,
- sizeof (struct in_addr), IP_RECVDSTADDR, IPPROTO_IP, mp);
+ sizeof(struct in_addr), IP_RECVDSTADDR, IPPROTO_IP, mp);
if (*mp == NULL) {
goto no_mbufs;
}
/* options were tossed already */
if (inp->inp_flags & INP_RECVOPTS) {
mp = sbcreatecontrol_mbuf((caddr_t)opts_deleted_above,
- sizeof (struct in_addr), IP_RECVOPTS, IPPROTO_IP, mp);
+ sizeof(struct in_addr), IP_RECVOPTS, IPPROTO_IP, mp);
if (*mp == NULL) {
goto no_mbufs;
}
/* ip_srcroute doesn't do what we want here, need to fix */
if (inp->inp_flags & INP_RECVRETOPTS) {
mp = sbcreatecontrol_mbuf((caddr_t)ip_srcroute(),
- sizeof (struct in_addr), IP_RECVRETOPTS, IPPROTO_IP, mp);
+ sizeof(struct in_addr), IP_RECVRETOPTS, IPPROTO_IP, mp);
if (*mp == NULL) {
goto no_mbufs;
}
* Make sure to accomodate the largest possible
* size of SA(if_lladdr)->sa_len.
*/
- _CASSERT(sizeof (sdlbuf) == (SOCK_MAXADDRLEN + 1));
+ _CASSERT(sizeof(sdlbuf) == (SOCK_MAXADDRLEN + 1));
ifnet_head_lock_shared();
if ((ifp = m->m_pkthdr.rcvif) != NULL &&
struct ifaddr *ifa = ifnet_addrs[ifp->if_index - 1];
struct sockaddr_dl *sdp;
- if (!ifa || !ifa->ifa_addr)
+ if (!ifa || !ifa->ifa_addr) {
goto makedummy;
+ }
IFA_LOCK_SPIN(ifa);
sdp = SDL(ifa->ifa_addr);
}
if (inp->inp_flags & INP_RECVTTL) {
mp = sbcreatecontrol_mbuf((caddr_t)&ip->ip_ttl,
- sizeof (ip->ip_ttl), IP_RECVTTL, IPPROTO_IP, mp);
+ sizeof(ip->ip_ttl), IP_RECVTTL, IPPROTO_IP, mp);
if (*mp == NULL) {
goto no_mbufs;
}
if (inp->inp_socket->so_flags & SOF_RECV_TRAFFIC_CLASS) {
int tc = m_get_traffic_class(m);
- mp = sbcreatecontrol_mbuf((caddr_t)&tc, sizeof (tc),
+ mp = sbcreatecontrol_mbuf((caddr_t)&tc, sizeof(tc),
SO_TRAFFIC_CLASS, SOL_SOCKET, mp);
if (*mp == NULL) {
goto no_mbufs;
if (inp->inp_flags & INP_PKTINFO) {
struct in_pktinfo pi;
- bzero(&pi, sizeof (struct in_pktinfo));
- bcopy(&ip->ip_dst, &pi.ipi_addr, sizeof (struct in_addr));
+ bzero(&pi, sizeof(struct in_pktinfo));
+ bcopy(&ip->ip_dst, &pi.ipi_addr, sizeof(struct in_addr));
pi.ipi_ifindex = (m != NULL && m->m_pkthdr.rcvif != NULL) ?
m->m_pkthdr.rcvif->if_index : 0;
mp = sbcreatecontrol_mbuf((caddr_t)&pi,
- sizeof (struct in_pktinfo), IP_RECVPKTINFO, IPPROTO_IP, mp);
+ sizeof(struct in_pktinfo), IP_RECVPKTINFO, IPPROTO_IP, mp);
+ if (*mp == NULL) {
+ goto no_mbufs;
+ }
+ }
+ if (inp->inp_flags & INP_RECVTOS) {
+ mp = sbcreatecontrol_mbuf((caddr_t)&ip->ip_tos,
+ sizeof(u_char), IP_RECVTOS, IPPROTO_IP, mp);
if (*mp == NULL) {
goto no_mbufs;
}
}
- return (0);
+ return 0;
no_mbufs:
ipstat.ips_pktdropcntrl++;
- return (ENOBUFS);
-}
-
-#if MROUTING
-int
-ip_rsvp_init(struct socket *so)
-{
- if (so->so_type != SOCK_RAW || SOCK_PROTO(so) != IPPROTO_RSVP)
- return (EOPNOTSUPP);
-
- if (ip_rsvpd != NULL)
- return (EADDRINUSE);
-
- ip_rsvpd = so;
- /*
- * This may seem silly, but we need to be sure we don't over-increment
- * the RSVP counter, in case something slips up.
- */
- if (!ip_rsvp_on) {
- ip_rsvp_on = 1;
- rsvp_on++;
- }
-
- return (0);
-}
-
-int
-ip_rsvp_done(void)
-{
- ip_rsvpd = NULL;
- /*
- * This may seem silly, but we need to be sure we don't over-decrement
- * the RSVP counter, in case something slips up.
- */
- if (ip_rsvp_on) {
- ip_rsvp_on = 0;
- rsvp_on--;
- }
- return (0);
+ return ENOBUFS;
}
-#endif /* MROUTING */
static inline u_short
ip_cksum(struct mbuf *m, int hlen)
m->m_pkthdr.csum_data = 0xffff;
}
- if (sum != 0)
+ if (sum != 0) {
OSAddAtomic(1, &ipstat.ips_badsum);
+ }
- return (sum);
+ return sum;
}
static int
ip_getstat SYSCTL_HANDLER_ARGS
{
#pragma unused(oidp, arg1, arg2)
- if (req->oldptr == USER_ADDR_NULL)
- req->oldlen = (size_t)sizeof (struct ipstat);
+ if (req->oldptr == USER_ADDR_NULL) {
+ req->oldlen = (size_t)sizeof(struct ipstat);
+ }
- return (SYSCTL_OUT(req, &ipstat, MIN(sizeof (ipstat), req->oldlen)));
+ return SYSCTL_OUT(req, &ipstat, MIN(sizeof(ipstat), req->oldlen));
}
void
m->m_pkthdr.src_ifindex = ia->ia_ifp->if_index;
} else {
m->m_pkthdr.src_ifindex = src_idx;
- if (src_idx != 0)
+ if (src_idx != 0) {
m->m_pkthdr.pkt_flags |= PKTF_IFAINFO;
+ }
}
}
m->m_pkthdr.dst_ifindex = ia->ia_ifp->if_index;
} else {
m->m_pkthdr.dst_ifindex = dst_idx;
- if (dst_idx != 0)
+ if (dst_idx != 0) {
m->m_pkthdr.pkt_flags |= PKTF_IFAINFO;
+ }
}
}
{
VERIFY(m->m_flags & M_PKTHDR);
- if (!(m->m_pkthdr.pkt_flags & PKTF_IFAINFO))
- return (-1);
+ if (!(m->m_pkthdr.pkt_flags & PKTF_IFAINFO)) {
+ return -1;
+ }
- if (src_idx != NULL)
+ if (src_idx != NULL) {
*src_idx = m->m_pkthdr.src_ifindex;
+ }
- if (iaf != NULL)
+ if (iaf != NULL) {
*iaf = 0;
+ }
- return (0);
+ return 0;
}
int
{
VERIFY(m->m_flags & M_PKTHDR);
- if (!(m->m_pkthdr.pkt_flags & PKTF_IFAINFO))
- return (-1);
+ if (!(m->m_pkthdr.pkt_flags & PKTF_IFAINFO)) {
+ return -1;
+ }
- if (dst_idx != NULL)
+ if (dst_idx != NULL) {
*dst_idx = m->m_pkthdr.dst_ifindex;
+ }
- if (iaf != NULL)
+ if (iaf != NULL) {
*iaf = 0;
+ }
- return (0);
+ return 0;
}
/*
* If no matching tunnel that is up is found, we inject
* the mbuf to raw ip socket to see if anyone picks it up.
*/
- if (m != NULL)
+ if (m != NULL) {
rip_input(m, off);
+ }
}
/*
gre_input_func = fn;
lck_mtx_unlock(inet_domain_mutex);
- return (0);
+ return 0;
+}
+
+#if (DEBUG || DEVELOPMENT)
+static int
+sysctl_reset_ip_input_stats SYSCTL_HANDLER_ARGS
+{
+#pragma unused(arg1, arg2)
+ int error, i;
+
+ i = ip_input_measure;
+ error = sysctl_handle_int(oidp, &i, 0, req);
+ if (error || req->newptr == USER_ADDR_NULL) {
+ goto done;
+ }
+ /* impose bounds */
+ if (i < 0 || i > 1) {
+ error = EINVAL;
+ goto done;
+ }
+ if (ip_input_measure != i && i == 1) {
+ net_perf_initialize(&net_perf, ip_input_measure_bins);
+ }
+ ip_input_measure = i;
+done:
+ return error;
+}
+
+static int
+sysctl_ip_input_measure_bins SYSCTL_HANDLER_ARGS
+{
+#pragma unused(arg1, arg2)
+ int error;
+ uint64_t i;
+
+ i = ip_input_measure_bins;
+ error = sysctl_handle_quad(oidp, &i, 0, req);
+ if (error || req->newptr == USER_ADDR_NULL) {
+ goto done;
+ }
+ /* validate data */
+ if (!net_perf_validate_bins(i)) {
+ error = EINVAL;
+ goto done;
+ }
+ ip_input_measure_bins = i;
+done:
+ return error;
+}
+
+static int
+sysctl_ip_input_getperf SYSCTL_HANDLER_ARGS
+{
+#pragma unused(oidp, arg1, arg2)
+ if (req->oldptr == USER_ADDR_NULL) {
+ req->oldlen = (size_t)sizeof(struct ipstat);
+ }
+
+ return SYSCTL_OUT(req, &net_perf, MIN(sizeof(net_perf), req->oldlen));
}
+#endif /* (DEBUG || DEVELOPMENT) */
projects / apple / xnu.git / blobdiff