#include <sys/param.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/mcache.h>
#include <sys/domain.h>
#include <sys/protosw.h>
#include <sys/socket.h>
#include <sys/errno.h>
#include <sys/time.h>
#include <sys/kernel.h>
#include <sys/syslog.h>
#include <net/if.h>
#include <net/if_ipsec.h>
#include <net/route.h>
#include <kern/cpu_number.h>
#include <kern/locks.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/in_var.h>
#include <netinet/ip.h>
#include <netinet/ip_var.h>
#include <netinet/ip_ecn.h>
#include <netinet/in_pcb.h>
#include <netinet6/ip6_ecn.h>
#include <netinet/ip6.h>
#include <netinet6/ip6_var.h>
#include <netinet6/in6_pcb.h>
#include <netinet/icmp6.h>
#include <netinet6/ip6protosw.h>
#include <netinet6/ipsec.h>
#include <netinet6/ipsec6.h>
#include <netinet6/ah.h>
#include <netinet6/ah6.h>
#include <netkey/key.h>
#include <netkey/keydb.h>
#if IPSEC_DEBUG
#include <netkey/key_debug.h>
#else
#define KEYDEBUG(lev, arg)
#endif
#include <net/kpi_protocol.h>
#include <netinet/kpi_ipfilter_var.h>
#include <mach/sdt.h>
#include <net/net_osdep.h>
#define IPLEN_FLIPPED
extern lck_mtx_t *sadb_mutex;
#if INET
void
ah4_input(struct mbuf *m, int off)
{
struct ip *ip;
struct ah *ah;
u_int32_t spi;
const struct ah_algorithm *algo;
size_t siz;
size_t siz1;
u_char *cksum;
struct secasvar *sav = NULL;
u_int16_t nxt;
u_int8_t hlen;
size_t stripsiz = 0;
sa_family_t ifamily;
if (m->m_len < off + sizeof(struct newah)) {
m = m_pullup(m, off + sizeof(struct newah));
if (!m) {
ipseclog((LOG_DEBUG, "IPv4 AH input: can't pullup;"
"dropping the packet for simplicity\n"));
IPSEC_STAT_INCREMENT(ipsecstat.in_inval);
goto fail;
}
}
MBUF_STRICT_DATA_ALIGNMENT_CHECK_32(m);
ip = mtod(m, struct ip *);
ah = (struct ah *)(void *)(((caddr_t)ip) + off);
nxt = ah->ah_nxt;
#ifdef _IP_VHL
hlen = (u_int8_t)(IP_VHL_HL(ip->ip_vhl) << 2);
#else
hlen = (u_int8_t)(ip->ip_hl << 2);
#endif
spi = ah->ah_spi;
if ((sav = key_allocsa(AF_INET,
(caddr_t)&ip->ip_src, (caddr_t)&ip->ip_dst,
IPPROTO_AH, spi)) == 0) {
ipseclog((LOG_WARNING,
"IPv4 AH input: no key association found for spi %u\n",
(u_int32_t)ntohl(spi)));
IPSEC_STAT_INCREMENT(ipsecstat.in_nosa);
goto fail;
}
KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
printf("DP ah4_input called to allocate SA:0x%llx\n",
(uint64_t)VM_KERNEL_ADDRPERM(sav)));
if (sav->state != SADB_SASTATE_MATURE
&& sav->state != SADB_SASTATE_DYING) {
ipseclog((LOG_DEBUG,
"IPv4 AH input: non-mature/dying SA found for spi %u\n",
(u_int32_t)ntohl(spi)));
IPSEC_STAT_INCREMENT(ipsecstat.in_badspi);
goto fail;
}
algo = ah_algorithm_lookup(sav->alg_auth);
if (!algo) {
ipseclog((LOG_DEBUG, "IPv4 AH input: "
"unsupported authentication algorithm for spi %u\n",
(u_int32_t)ntohl(spi)));
IPSEC_STAT_INCREMENT(ipsecstat.in_badspi);
goto fail;
}
siz = (*algo->sumsiz)(sav);
siz1 = ((siz + 3) & ~(4 - 1));
{
int sizoff;
sizoff = (sav->flags & SADB_X_EXT_OLD) ? 0 : 4;
if (siz1 < siz) {
ipseclog((LOG_NOTICE, "sum length too short in IPv4 AH input "
"(%u, should be at least %u): %s\n",
(u_int32_t)siz1, (u_int32_t)siz,
ipsec4_logpacketstr(ip, spi)));
IPSEC_STAT_INCREMENT(ipsecstat.in_inval);
goto fail;
}
if ((ah->ah_len << 2) - sizoff != siz1) {
ipseclog((LOG_NOTICE, "sum length mismatch in IPv4 AH input "
"(%d should be %u): %s\n",
(ah->ah_len << 2) - sizoff, (u_int32_t)siz1,
ipsec4_logpacketstr(ip, spi)));
IPSEC_STAT_INCREMENT(ipsecstat.in_inval);
goto fail;
}
if (m->m_len < off + sizeof(struct ah) + sizoff + siz1) {
VERIFY((off + sizeof(struct ah) + sizoff + siz1) <= INT_MAX);
m = m_pullup(m, (int)(off + sizeof(struct ah) + sizoff + siz1));
if (!m) {
ipseclog((LOG_DEBUG, "IPv4 AH input: can't pullup\n"));
IPSEC_STAT_INCREMENT(ipsecstat.in_inval);
goto fail;
}
MBUF_STRICT_DATA_ALIGNMENT_CHECK_32(m);
ip = mtod(m, struct ip *);
ah = (struct ah *)(void *)(((caddr_t)ip) + off);
}
}
if ((sav->flags & SADB_X_EXT_OLD) == 0 && sav->replay[0] != NULL) {
if (ipsec_chkreplay(ntohl(((struct newah *)ah)->ah_seq), sav, 0)) {
;
} else {
IPSEC_STAT_INCREMENT(ipsecstat.in_ahreplay);
ipseclog((LOG_WARNING,
"replay packet in IPv4 AH input: %s %s\n",
ipsec4_logpacketstr(ip, spi), ipsec_logsastr(sav)));
goto fail;
}
}
cksum = _MALLOC(siz1, M_TEMP, M_NOWAIT);
if (!cksum) {
ipseclog((LOG_DEBUG, "IPv4 AH input: "
"couldn't alloc temporary region for cksum\n"));
IPSEC_STAT_INCREMENT(ipsecstat.in_inval);
goto fail;
}
if ((ip->ip_len + hlen) > UINT16_MAX) {
ipseclog((LOG_DEBUG, "IPv4 AH input: "
"bad length ip header len %u, total len %u\n",
ip->ip_len, hlen));
IPSEC_STAT_INCREMENT(ipsecstat.in_inval);
goto fail;
}
ip->ip_len = htons((u_int16_t)(ip->ip_len + hlen));
ip->ip_off = htons(ip->ip_off);
if (ah4_calccksum(m, (caddr_t)cksum, siz1, algo, sav)) {
FREE(cksum, M_TEMP);
IPSEC_STAT_INCREMENT(ipsecstat.in_inval);
goto fail;
}
IPSEC_STAT_INCREMENT(ipsecstat.in_ahhist[sav->alg_auth]);
ip->ip_len = ntohs(ip->ip_len) - hlen;
ip->ip_off = ntohs(ip->ip_off);
{
caddr_t sumpos = NULL;
if (sav->flags & SADB_X_EXT_OLD) {
sumpos = (caddr_t)(ah + 1);
} else {
sumpos = (caddr_t)(((struct newah *)ah) + 1);
}
if (bcmp(sumpos, cksum, siz) != 0) {
ipseclog((LOG_WARNING,
"checksum mismatch in IPv4 AH input: %s %s\n",
ipsec4_logpacketstr(ip, spi), ipsec_logsastr(sav)));
FREE(cksum, M_TEMP);
IPSEC_STAT_INCREMENT(ipsecstat.in_ahauthfail);
goto fail;
}
}
FREE(cksum, M_TEMP);
m->m_flags |= M_AUTHIPHDR;
m->m_flags |= M_AUTHIPDGM;
if (m->m_flags & M_AUTHIPHDR && m->m_flags & M_AUTHIPDGM) {
IPSEC_STAT_INCREMENT(ipsecstat.in_ahauthsucc);
} else {
ipseclog((LOG_WARNING,
"authentication failed in IPv4 AH input: %s %s\n",
ipsec4_logpacketstr(ip, spi), ipsec_logsastr(sav)));
IPSEC_STAT_INCREMENT(ipsecstat.in_ahauthfail);
goto fail;
}
if ((sav->flags & SADB_X_EXT_OLD) == 0 && sav->replay[0] != NULL) {
if (ipsec_updatereplay(ntohl(((struct newah *)ah)->ah_seq), sav, 0)) {
IPSEC_STAT_INCREMENT(ipsecstat.in_ahreplay);
goto fail;
}
}
if (sav->flags & SADB_X_EXT_OLD) {
stripsiz = sizeof(struct ah) + siz1;
} else {
stripsiz = sizeof(struct newah) + siz1;
}
if (ipsec4_tunnel_validate(m, (int)(off + stripsiz), nxt, sav, &ifamily)) {
ifaddr_t ifa;
struct sockaddr_storage addr;
struct sockaddr_in *ipaddr;
u_int8_t tos, otos;
int sum;
if (ifamily == AF_INET6) {
ipseclog((LOG_NOTICE, "ipsec tunnel protocol mismatch "
"in IPv4 AH input: %s\n", ipsec_logsastr(sav)));
goto fail;
}
tos = ip->ip_tos;
m_adj(m, (int)(off + stripsiz));
if (m->m_len < sizeof(*ip)) {
m = m_pullup(m, sizeof(*ip));
if (!m) {
IPSEC_STAT_INCREMENT(ipsecstat.in_inval);
goto fail;
}
}
ip = mtod(m, struct ip *);
otos = ip->ip_tos;
if (ip_ecn_egress(ip4_ipsec_ecn, &tos, &ip->ip_tos) == 0) {
IPSEC_STAT_INCREMENT(ipsecstat.in_inval);
goto fail;
}
if (otos != ip->ip_tos) {
sum = ~ntohs(ip->ip_sum) & 0xffff;
sum += (~otos & 0xffff) + ip->ip_tos;
sum = (sum >> 16) + (sum & 0xffff);
sum += (sum >> 16);
ip->ip_sum = htons(~sum & 0xffff);
}
if (!key_checktunnelsanity(sav, AF_INET,
(caddr_t)&ip->ip_src, (caddr_t)&ip->ip_dst)) {
ipseclog((LOG_NOTICE, "ipsec tunnel address mismatch "
"in IPv4 AH input: %s %s\n",
ipsec4_logpacketstr(ip, spi), ipsec_logsastr(sav)));
IPSEC_STAT_INCREMENT(ipsecstat.in_inval);
goto fail;
}
#if 1
m->m_flags &= ~M_AUTHIPHDR;
m->m_flags &= ~M_AUTHIPDGM;
#endif
key_sa_recordxfer(sav, m);
if (ipsec_addhist(m, IPPROTO_AH, spi) != 0 ||
ipsec_addhist(m, IPPROTO_IPV4, 0) != 0) {
IPSEC_STAT_INCREMENT(ipsecstat.in_nomem);
goto fail;
}
bzero(&addr, sizeof(addr));
ipaddr = (__typeof__(ipaddr)) & addr;
ipaddr->sin_family = AF_INET;
ipaddr->sin_len = sizeof(*ipaddr);
ipaddr->sin_addr = ip->ip_dst;
ifa = ifa_ifwithaddr((struct sockaddr *)&addr);
if (ifa) {
m->m_pkthdr.rcvif = ifa->ifa_ifp;
IFA_REMREF(ifa);
}
lck_mtx_lock(sadb_mutex);
ifnet_t ipsec_if = sav->sah->ipsec_if;
if (ipsec_if != NULL) {
ifnet_reference(ipsec_if);
}
lck_mtx_unlock(sadb_mutex);
if (ipsec_if != NULL) {
errno_t inject_error = ipsec_inject_inbound_packet(ipsec_if, m);
ifnet_release(ipsec_if);
if (inject_error == 0) {
m = NULL;
goto done;
} else {
goto fail;
}
}
if (proto_input(PF_INET, m) != 0) {
goto fail;
}
nxt = IPPROTO_DONE;
} else {
ip = mtod(m, struct ip *);
ovbcopy((caddr_t)ip, (caddr_t)(((u_char *)ip) + stripsiz), off);
m->m_data += stripsiz;
m->m_len -= stripsiz;
m->m_pkthdr.len -= stripsiz;
if (m->m_len < sizeof(*ip)) {
m = m_pullup(m, sizeof(*ip));
if (m == NULL) {
IPSEC_STAT_INCREMENT(ipsecstat.in_inval);
goto fail;
}
}
ip = mtod(m, struct ip *);
#ifdef IPLEN_FLIPPED
ip->ip_len = (u_short)(ip->ip_len - stripsiz);
#else
ip->ip_len = htons(ntohs(ip->ip_len) - stripsiz);
#endif
ip->ip_p = (u_char)nxt;
key_sa_recordxfer(sav, m);
if (ipsec_addhist(m, IPPROTO_AH, spi) != 0) {
IPSEC_STAT_INCREMENT(ipsecstat.in_nomem);
goto fail;
}
DTRACE_IP6(receive, struct mbuf *, m, struct inpcb *, NULL,
struct ip *, ip, struct ifnet *, m->m_pkthdr.rcvif,
struct ip *, ip, struct ip6_hdr *, NULL);
if (nxt != IPPROTO_DONE) {
lck_mtx_lock(sadb_mutex);
ifnet_t ipsec_if = sav->sah->ipsec_if;
if (ipsec_if != NULL) {
ifnet_reference(ipsec_if);
}
lck_mtx_unlock(sadb_mutex);
if (ipsec_if != NULL) {
ip->ip_len = htons(ip->ip_len + hlen);
ip->ip_off = htons(ip->ip_off);
ip->ip_sum = 0;
ip->ip_sum = ip_cksum_hdr_in(m, hlen);
errno_t inject_error = ipsec_inject_inbound_packet(ipsec_if, m);
ifnet_release(ipsec_if);
if (inject_error == 0) {
m = NULL;
goto done;
} else {
goto fail;
}
}
if ((ip_protox[nxt]->pr_flags & PR_LASTHDR) != 0 &&
ipsec4_in_reject(m, NULL)) {
IPSEC_STAT_INCREMENT(ipsecstat.in_polvio);
goto fail;
}
ip_proto_dispatch_in(m, off, (u_int8_t)nxt, 0);
} else {
m_freem(m);
}
m = NULL;
}
done:
if (sav) {
KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
printf("DP ah4_input call free SA:0x%llx\n",
(uint64_t)VM_KERNEL_ADDRPERM(sav)));
key_freesav(sav, KEY_SADB_UNLOCKED);
}
IPSEC_STAT_INCREMENT(ipsecstat.in_success);
return;
fail:
if (sav) {
KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
printf("DP ah4_input call free SA:0x%llx\n",
(uint64_t)VM_KERNEL_ADDRPERM(sav)));
key_freesav(sav, KEY_SADB_UNLOCKED);
}
if (m) {
m_freem(m);
}
return;
}
#endif
int
ah6_input(struct mbuf **mp, int *offp, int proto)
{
#pragma unused(proto)
struct mbuf *m = *mp;
int off = *offp;
struct ip6_hdr *ip6 = NULL;
struct ah *ah = NULL;
u_int32_t spi = 0;
const struct ah_algorithm *algo = NULL;
size_t siz = 0;
size_t siz1 = 0;
u_char *cksum = NULL;
struct secasvar *sav = NULL;
u_int16_t nxt = IPPROTO_DONE;
size_t stripsiz = 0;
sa_family_t ifamily = AF_UNSPEC;
IP6_EXTHDR_CHECK(m, off, sizeof(struct ah), {return IPPROTO_DONE;});
ah = (struct ah *)(void *)(mtod(m, caddr_t) + off);
MBUF_STRICT_DATA_ALIGNMENT_CHECK_32(m);
ip6 = mtod(m, struct ip6_hdr *);
nxt = ah->ah_nxt;
spi = ah->ah_spi;
if (ntohs(ip6->ip6_plen) == 0) {
ipseclog((LOG_ERR, "IPv6 AH input: "
"AH with IPv6 jumbogram is not supported.\n"));
IPSEC_STAT_INCREMENT(ipsec6stat.in_inval);
goto fail;
}
if ((sav = key_allocsa(AF_INET6,
(caddr_t)&ip6->ip6_src, (caddr_t)&ip6->ip6_dst,
IPPROTO_AH, spi)) == 0) {
ipseclog((LOG_WARNING,
"IPv6 AH input: no key association found for spi %u\n",
(u_int32_t)ntohl(spi)));
IPSEC_STAT_INCREMENT(ipsec6stat.in_nosa);
goto fail;
}
KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
printf("DP ah6_input called to allocate SA:0x%llx\n",
(uint64_t)VM_KERNEL_ADDRPERM(sav)));
if (sav->state != SADB_SASTATE_MATURE
&& sav->state != SADB_SASTATE_DYING) {
ipseclog((LOG_DEBUG,
"IPv6 AH input: non-mature/dying SA found for spi %u; ",
(u_int32_t)ntohl(spi)));
IPSEC_STAT_INCREMENT(ipsec6stat.in_badspi);
goto fail;
}
algo = ah_algorithm_lookup(sav->alg_auth);
if (!algo) {
ipseclog((LOG_DEBUG, "IPv6 AH input: "
"unsupported authentication algorithm for spi %u\n",
(u_int32_t)ntohl(spi)));
IPSEC_STAT_INCREMENT(ipsec6stat.in_badspi);
goto fail;
}
siz = (*algo->sumsiz)(sav);
siz1 = ((siz + 3) & ~(4 - 1));
{
int sizoff;
sizoff = (sav->flags & SADB_X_EXT_OLD) ? 0 : 4;
if (siz1 < siz) {
ipseclog((LOG_NOTICE, "sum length too short in IPv6 AH input "
"(%u, should be at least %u): %s\n",
(u_int32_t)siz1, (u_int32_t)siz,
ipsec6_logpacketstr(ip6, spi)));
IPSEC_STAT_INCREMENT(ipsec6stat.in_inval);
goto fail;
}
if ((ah->ah_len << 2) - sizoff != siz1) {
ipseclog((LOG_NOTICE, "sum length mismatch in IPv6 AH input "
"(%d should be %u): %s\n",
(ah->ah_len << 2) - sizoff, (u_int32_t)siz1,
ipsec6_logpacketstr(ip6, spi)));
IPSEC_STAT_INCREMENT(ipsec6stat.in_inval);
goto fail;
}
VERIFY((sizeof(struct ah) + sizoff + siz1) <= INT_MAX);
IP6_EXTHDR_CHECK(m, off, (int)(sizeof(struct ah) + sizoff + siz1),
{return IPPROTO_DONE;});
ip6 = mtod(m, struct ip6_hdr *);
ah = (struct ah *)(void *)(mtod(m, caddr_t) + off);
}
if ((sav->flags & SADB_X_EXT_OLD) == 0 && sav->replay[0] != NULL) {
if (ipsec_chkreplay(ntohl(((struct newah *)ah)->ah_seq), sav, 0)) {
;
} else {
IPSEC_STAT_INCREMENT(ipsec6stat.in_ahreplay);
ipseclog((LOG_WARNING,
"replay packet in IPv6 AH input: %s %s\n",
ipsec6_logpacketstr(ip6, spi),
ipsec_logsastr(sav)));
goto fail;
}
}
cksum = _MALLOC(siz1, M_TEMP, M_NOWAIT);
if (!cksum) {
ipseclog((LOG_DEBUG, "IPv6 AH input: "
"couldn't alloc temporary region for cksum\n"));
IPSEC_STAT_INCREMENT(ipsec6stat.in_inval);
goto fail;
}
if (ah6_calccksum(m, (caddr_t)cksum, siz1, algo, sav)) {
FREE(cksum, M_TEMP);
IPSEC_STAT_INCREMENT(ipsec6stat.in_inval);
goto fail;
}
IPSEC_STAT_INCREMENT(ipsec6stat.in_ahhist[sav->alg_auth]);
{
caddr_t sumpos = NULL;
if (sav->flags & SADB_X_EXT_OLD) {
sumpos = (caddr_t)(ah + 1);
} else {
sumpos = (caddr_t)(((struct newah *)ah) + 1);
}
if (bcmp(sumpos, cksum, siz) != 0) {
ipseclog((LOG_WARNING,
"checksum mismatch in IPv6 AH input: %s %s\n",
ipsec6_logpacketstr(ip6, spi), ipsec_logsastr(sav)));
FREE(cksum, M_TEMP);
IPSEC_STAT_INCREMENT(ipsec6stat.in_ahauthfail);
goto fail;
}
}
FREE(cksum, M_TEMP);
m->m_flags |= M_AUTHIPHDR;
m->m_flags |= M_AUTHIPDGM;
if (m->m_flags & M_AUTHIPHDR && m->m_flags & M_AUTHIPDGM) {
IPSEC_STAT_INCREMENT(ipsec6stat.in_ahauthsucc);
} else {
ipseclog((LOG_WARNING,
"authentication failed in IPv6 AH input: %s %s\n",
ipsec6_logpacketstr(ip6, spi), ipsec_logsastr(sav)));
IPSEC_STAT_INCREMENT(ipsec6stat.in_ahauthfail);
goto fail;
}
if ((sav->flags & SADB_X_EXT_OLD) == 0 && sav->replay[0] != NULL) {
if (ipsec_updatereplay(ntohl(((struct newah *)ah)->ah_seq), sav, 0)) {
IPSEC_STAT_INCREMENT(ipsec6stat.in_ahreplay);
goto fail;
}
}
if (sav->flags & SADB_X_EXT_OLD) {
stripsiz = sizeof(struct ah) + siz1;
} else {
stripsiz = sizeof(struct newah) + siz1;
}
if (ipsec6_tunnel_validate(m, (int)(off + stripsiz), nxt, sav, &ifamily)) {
ifaddr_t ifa;
struct sockaddr_storage addr;
struct sockaddr_in6 *ip6addr;
u_int32_t flowinfo;
if (ifamily == AF_INET) {
ipseclog((LOG_NOTICE, "ipsec tunnel protocol mismatch "
"in IPv6 AH input: %s\n", ipsec_logsastr(sav)));
goto fail;
}
flowinfo = ip6->ip6_flow;
m_adj(m, (int)(off + stripsiz));
if (m->m_len < sizeof(*ip6)) {
m = m_pullup(m, sizeof(*ip6));
if (!m) {
IPSEC_STAT_INCREMENT(ipsec6stat.in_inval);
goto fail;
}
}
ip6 = mtod(m, struct ip6_hdr *);
if (ip6_ecn_egress(ip6_ipsec_ecn, &flowinfo, &ip6->ip6_flow) == 0) {
IPSEC_STAT_INCREMENT(ipsec6stat.in_inval);
goto fail;
}
if (!key_checktunnelsanity(sav, AF_INET6,
(caddr_t)&ip6->ip6_src, (caddr_t)&ip6->ip6_dst)) {
ipseclog((LOG_NOTICE, "ipsec tunnel address mismatch "
"in IPv6 AH input: %s %s\n",
ipsec6_logpacketstr(ip6, spi),
ipsec_logsastr(sav)));
IPSEC_STAT_INCREMENT(ipsec6stat.in_inval);
goto fail;
}
m->m_flags &= ~M_AUTHIPHDR;
m->m_flags &= ~M_AUTHIPDGM;
key_sa_recordxfer(sav, m);
if (ipsec_addhist(m, IPPROTO_AH, spi) != 0 ||
ipsec_addhist(m, IPPROTO_IPV6, 0) != 0) {
IPSEC_STAT_INCREMENT(ipsec6stat.in_nomem);
goto fail;
}
bzero(&addr, sizeof(addr));
ip6addr = (__typeof__(ip6addr)) & addr;
ip6addr->sin6_family = AF_INET6;
ip6addr->sin6_len = sizeof(*ip6addr);
ip6addr->sin6_addr = ip6->ip6_dst;
ifa = ifa_ifwithaddr((struct sockaddr *)&addr);
if (ifa) {
m->m_pkthdr.rcvif = ifa->ifa_ifp;
IFA_REMREF(ifa);
}
lck_mtx_lock(sadb_mutex);
ifnet_t ipsec_if = sav->sah->ipsec_if;
if (ipsec_if != NULL) {
ifnet_reference(ipsec_if);
}
lck_mtx_unlock(sadb_mutex);
if (ipsec_if != NULL) {
errno_t inject_error = ipsec_inject_inbound_packet(ipsec_if, m);
ifnet_release(ipsec_if);
if (inject_error == 0) {
m = NULL;
nxt = IPPROTO_DONE;
goto done;
} else {
goto fail;
}
}
if (proto_input(PF_INET6, m) != 0) {
goto fail;
}
nxt = IPPROTO_DONE;
} else {
char *prvnxtp;
prvnxtp = ip6_get_prevhdr(m, off);
*prvnxtp = (u_int8_t)nxt;
ip6 = mtod(m, struct ip6_hdr *);
ovbcopy((caddr_t)ip6, ((caddr_t)ip6) + stripsiz, off);
m->m_data += stripsiz;
m->m_len -= stripsiz;
m->m_pkthdr.len -= stripsiz;
ip6 = mtod(m, struct ip6_hdr *);
ip6->ip6_plen = htons((u_int16_t)(ntohs(ip6->ip6_plen) - stripsiz));
key_sa_recordxfer(sav, m);
if (ipsec_addhist(m, IPPROTO_AH, spi) != 0) {
IPSEC_STAT_INCREMENT(ipsec6stat.in_nomem);
goto fail;
}
lck_mtx_lock(sadb_mutex);
ifnet_t ipsec_if = sav->sah->ipsec_if;
if (ipsec_if != NULL) {
ifnet_reference(ipsec_if);
}
lck_mtx_unlock(sadb_mutex);
if (ipsec_if != NULL) {
errno_t inject_error = ipsec_inject_inbound_packet(ipsec_if, m);
ifnet_release(ipsec_if);
if (inject_error == 0) {
m = NULL;
nxt = IPPROTO_DONE;
goto done;
} else {
goto fail;
}
}
}
done:
*offp = off;
*mp = m;
if (sav) {
KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
printf("DP ah6_input call free SA:0x%llx\n",
(uint64_t)VM_KERNEL_ADDRPERM(sav)));
key_freesav(sav, KEY_SADB_UNLOCKED);
}
IPSEC_STAT_INCREMENT(ipsec6stat.in_success);
return nxt;
fail:
if (sav) {
KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
printf("DP ah6_input call free SA:0x%llx\n",
(uint64_t)VM_KERNEL_ADDRPERM(sav)));
key_freesav(sav, KEY_SADB_UNLOCKED);
}
if (m) {
m_freem(m);
*mp = NULL;
}
return IPPROTO_DONE;
}
void
ah6_ctlinput(int cmd, struct sockaddr *sa, void *d)
{
const struct newah *ahp;
struct newah ah;
struct secasvar *sav;
struct ip6_hdr *ip6;
struct mbuf *m;
struct ip6ctlparam *ip6cp = NULL;
int off = 0;
struct sockaddr_in6 *sa6_src, *sa6_dst;
if (sa->sa_family != AF_INET6 ||
sa->sa_len != sizeof(struct sockaddr_in6)) {
return;
}
if ((unsigned)cmd >= PRC_NCMDS) {
return;
}
if (d != NULL) {
ip6cp = (struct ip6ctlparam *)d;
m = ip6cp->ip6c_m;
ip6 = ip6cp->ip6c_ip6;
off = ip6cp->ip6c_off;
} else {
m = NULL;
ip6 = NULL;
}
if (ip6) {
if (m->m_pkthdr.len < off + sizeof(ah)) {
return;
}
if (m->m_len < off + sizeof(ah)) {
m_copydata(m, off, sizeof(ah), (caddr_t)&ah);
ahp = &ah;
} else {
ahp = (struct newah *)(void *)(mtod(m, caddr_t) + off);
}
if (cmd == PRC_MSGSIZE) {
int valid = 0;
sa6_src = ip6cp->ip6c_src;
sa6_dst = (struct sockaddr_in6 *)(void *)sa;
sav = key_allocsa(AF_INET6,
(caddr_t)&sa6_src->sin6_addr,
(caddr_t)&sa6_dst->sin6_addr,
IPPROTO_AH, ahp->ah_spi);
if (sav) {
if (sav->state == SADB_SASTATE_MATURE ||
sav->state == SADB_SASTATE_DYING) {
valid++;
}
key_freesav(sav, KEY_SADB_UNLOCKED);
}
icmp6_mtudisc_update((struct ip6ctlparam *)d, valid);
}
} else {
}
}