#include <sys/param.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/domain.h>
#include <sys/protosw.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/sockio.h>
#include <sys/errno.h>
#include <sys/time.h>
#include <sys/proc.h>
#include <sys/kauth.h>
#include <sys/priv.h>
#include <net/if.h>
#include <net/if_types.h>
#include <net/route.h>
#include <net/ntstat.h>
#include <net/restricted_in_port.h>
#include <netinet/in.h>
#include <netinet/in_var.h>
#include <netinet/in_systm.h>
#include <netinet/ip6.h>
#include <netinet/ip_var.h>
#include <netinet6/ip6_var.h>
#include <netinet6/nd6.h>
#include <netinet/in_pcb.h>
#include <netinet6/in6_pcb.h>
#include <net/if_types.h>
#include <net/if_var.h>
#include <kern/kern_types.h>
#include <kern/zalloc.h>
#if IPSEC
#include <netinet6/ipsec.h>
#include <netinet6/ipsec6.h>
#include <netinet6/ah.h>
#include <netinet6/ah6.h>
#include <netkey/key.h>
#endif
#if NECP
#include <net/necp.h>
#endif
static struct inpcb *
in6_pcblookup_local_and_cleanup(struct inpcbinfo *pcbinfo,
struct in6_addr *laddr, u_int lport_arg, int wild_okay)
{
struct inpcb *inp;
inp = in6_pcblookup_local(pcbinfo, laddr, lport_arg, wild_okay);
if (inp != NULL && inp->inp_wantcnt == WNT_STOPUSING) {
struct socket *so = inp->inp_socket;
socket_lock(so, 0);
if (so->so_usecount == 0) {
if (inp->inp_state != INPCB_STATE_DEAD) {
in6_pcbdetach(inp);
}
in_pcbdispose(inp);
inp = NULL;
} else {
socket_unlock(so, 0);
}
}
return inp;
}
int
in6_pcbbind(struct inpcb *inp, struct sockaddr *nam, struct proc *p)
{
struct socket *so = inp->inp_socket;
struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
u_short lport = 0;
int wild = 0, reuseport = (so->so_options & SO_REUSEPORT);
struct ifnet *outif = NULL;
struct sockaddr_in6 sin6;
#if XNU_TARGET_OS_OSX
int error;
kauth_cred_t cred;
#endif
if (TAILQ_EMPTY(&in6_ifaddrhead)) {
return EADDRNOTAVAIL;
}
if (!(so->so_options & (SO_REUSEADDR | SO_REUSEPORT))) {
wild = 1;
}
socket_unlock(so, 0);
lck_rw_lock_exclusive(pcbinfo->ipi_lock);
if (inp->inp_lport || !IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) {
lck_rw_done(pcbinfo->ipi_lock);
socket_lock(so, 0);
return EINVAL;
}
bzero(&sin6, sizeof(sin6));
if (nam != NULL) {
if (nam->sa_len != sizeof(struct sockaddr_in6)) {
lck_rw_done(pcbinfo->ipi_lock);
socket_lock(so, 0);
return EINVAL;
}
if (nam->sa_family != AF_INET6) {
lck_rw_done(pcbinfo->ipi_lock);
socket_lock(so, 0);
return EAFNOSUPPORT;
}
lport = SIN6(nam)->sin6_port;
*(&sin6) = *SIN6(nam);
if (in6_embedscope(&sin6.sin6_addr, &sin6, inp, NULL,
NULL) != 0) {
lck_rw_done(pcbinfo->ipi_lock);
socket_lock(so, 0);
return EINVAL;
}
sin6.sin6_flowinfo = 0;
sin6.sin6_scope_id = 0;
sin6.sin6_port = 0;
if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
if (so->so_options & SO_REUSEADDR) {
reuseport = SO_REUSEADDR | SO_REUSEPORT;
}
} else if (!IN6_IS_ADDR_UNSPECIFIED(&sin6.sin6_addr)) {
struct ifaddr *ifa;
ifa = ifa_ifwithaddr(SA(&sin6));
if (ifa == NULL) {
lck_rw_done(pcbinfo->ipi_lock);
socket_lock(so, 0);
return EADDRNOTAVAIL;
} else {
IFA_LOCK_SPIN(ifa);
if (((struct in6_ifaddr *)ifa)->ia6_flags &
(IN6_IFF_ANYCAST | IN6_IFF_NOTREADY |
IN6_IFF_DETACHED | IN6_IFF_CLAT46)) {
IFA_UNLOCK(ifa);
IFA_REMREF(ifa);
lck_rw_done(pcbinfo->ipi_lock);
socket_lock(so, 0);
return EADDRNOTAVAIL;
}
outif = ifa->ifa_ifp;
IFA_UNLOCK(ifa);
IFA_REMREF(ifa);
}
}
if (lport != 0) {
struct inpcb *t;
uid_t u;
#if XNU_TARGET_OS_OSX
if (ntohs(lport) < IPV6PORT_RESERVED &&
!IN6_IS_ADDR_UNSPECIFIED(&sin6.sin6_addr) &&
!(inp->inp_flags2 & INP2_EXTERNAL_PORT)) {
cred = kauth_cred_proc_ref(p);
error = priv_check_cred(cred,
PRIV_NETINET_RESERVEDPORT, 0);
kauth_cred_unref(&cred);
if (error != 0) {
lck_rw_done(pcbinfo->ipi_lock);
socket_lock(so, 0);
return EACCES;
}
}
#endif
if (!current_task_can_use_restricted_in_port(lport,
(uint8_t)SOCK_PROTO(so), PORT_FLAGS_BSD)) {
lck_rw_done(pcbinfo->ipi_lock);
socket_lock(so, 0);
return EADDRINUSE;
}
if (!IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr) &&
(u = kauth_cred_getuid(so->so_cred)) != 0) {
t = in6_pcblookup_local_and_cleanup(pcbinfo,
&sin6.sin6_addr, lport,
INPLOOKUP_WILDCARD);
if (t != NULL &&
(!IN6_IS_ADDR_UNSPECIFIED(&sin6.sin6_addr) ||
!IN6_IS_ADDR_UNSPECIFIED(&t->in6p_laddr) ||
!(t->inp_socket->so_options & SO_REUSEPORT)) &&
(u != kauth_cred_getuid(t->inp_socket->so_cred)) &&
!(t->inp_socket->so_flags & SOF_REUSESHAREUID) &&
(!(t->inp_flags2 & INP2_EXTERNAL_PORT) ||
!(inp->inp_flags2 & INP2_EXTERNAL_PORT) ||
uuid_compare(t->necp_client_uuid, inp->necp_client_uuid) != 0)) {
lck_rw_done(pcbinfo->ipi_lock);
socket_lock(so, 0);
return EADDRINUSE;
}
if (!(inp->inp_flags & IN6P_IPV6_V6ONLY) &&
IN6_IS_ADDR_UNSPECIFIED(&sin6.sin6_addr)) {
struct sockaddr_in sin;
in6_sin6_2_sin(&sin, &sin6);
t = in_pcblookup_local_and_cleanup(
pcbinfo, sin.sin_addr, lport,
INPLOOKUP_WILDCARD);
if (t != NULL &&
!(t->inp_socket->so_options & SO_REUSEPORT) &&
(kauth_cred_getuid(so->so_cred) !=
kauth_cred_getuid(t->inp_socket->so_cred)) &&
(t->inp_laddr.s_addr != INADDR_ANY ||
SOCK_DOM(so) == SOCK_DOM(t->inp_socket)) &&
(!(t->inp_flags2 & INP2_EXTERNAL_PORT) ||
!(inp->inp_flags2 & INP2_EXTERNAL_PORT) ||
uuid_compare(t->necp_client_uuid, inp->necp_client_uuid) != 0)) {
lck_rw_done(pcbinfo->ipi_lock);
socket_lock(so, 0);
return EADDRINUSE;
}
}
}
t = in6_pcblookup_local_and_cleanup(pcbinfo,
&sin6.sin6_addr, lport, wild);
if (t != NULL &&
(reuseport & t->inp_socket->so_options) == 0 &&
(!(t->inp_flags2 & INP2_EXTERNAL_PORT) ||
!(inp->inp_flags2 & INP2_EXTERNAL_PORT) ||
uuid_compare(t->necp_client_uuid, inp->necp_client_uuid) != 0)) {
lck_rw_done(pcbinfo->ipi_lock);
socket_lock(so, 0);
return EADDRINUSE;
}
if (!(inp->inp_flags & IN6P_IPV6_V6ONLY) &&
IN6_IS_ADDR_UNSPECIFIED(&sin6.sin6_addr)) {
struct sockaddr_in sin;
in6_sin6_2_sin(&sin, &sin6);
t = in_pcblookup_local_and_cleanup(pcbinfo,
sin.sin_addr, lport, wild);
if (t != NULL && (reuseport &
t->inp_socket->so_options) == 0 &&
(t->inp_laddr.s_addr != INADDR_ANY ||
SOCK_DOM(so) == SOCK_DOM(t->inp_socket)) &&
(!(t->inp_flags2 & INP2_EXTERNAL_PORT) ||
!(inp->inp_flags2 & INP2_EXTERNAL_PORT) ||
uuid_compare(t->necp_client_uuid, inp->necp_client_uuid) != 0)) {
lck_rw_done(pcbinfo->ipi_lock);
socket_lock(so, 0);
return EADDRINUSE;
}
}
}
}
socket_lock(so, 0);
if (inp->inp_state == INPCB_STATE_DEAD) {
lck_rw_done(pcbinfo->ipi_lock);
return ECONNABORTED;
}
if (inp->inp_lport || !IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) {
lck_rw_done(pcbinfo->ipi_lock);
return EINVAL;
}
if (!IN6_IS_ADDR_UNSPECIFIED(&sin6.sin6_addr)) {
inp->in6p_laddr = sin6.sin6_addr;
inp->in6p_last_outifp = outif;
}
if (lport == 0) {
int e;
if ((e = in6_pcbsetport(&inp->in6p_laddr, inp, p, 1)) != 0) {
inp->in6p_laddr = in6addr_any;
inp->in6p_last_outifp = NULL;
lck_rw_done(pcbinfo->ipi_lock);
return e;
}
} else {
inp->inp_lport = lport;
if (in_pcbinshash(inp, 1) != 0) {
inp->in6p_laddr = in6addr_any;
inp->inp_lport = 0;
inp->in6p_last_outifp = NULL;
lck_rw_done(pcbinfo->ipi_lock);
return EAGAIN;
}
}
lck_rw_done(pcbinfo->ipi_lock);
sflt_notify(so, sock_evt_bound, NULL);
return 0;
}
int
in6_pcbladdr(struct inpcb *inp, struct sockaddr *nam,
struct in6_addr *plocal_addr6, struct ifnet **outif)
{
struct in6_addr *addr6 = NULL;
struct in6_addr src_storage;
int error = 0;
unsigned int ifscope;
if (outif != NULL) {
*outif = NULL;
}
if (nam->sa_len != sizeof(struct sockaddr_in6)) {
return EINVAL;
}
if (SIN6(nam)->sin6_family != AF_INET6) {
return EAFNOSUPPORT;
}
if (SIN6(nam)->sin6_port == 0) {
return EADDRNOTAVAIL;
}
if (in6_embedscope(&SIN6(nam)->sin6_addr, SIN6(nam), inp, NULL, NULL) != 0) {
return EINVAL;
}
if (!TAILQ_EMPTY(&in6_ifaddrhead)) {
if (IN6_IS_ADDR_UNSPECIFIED(&SIN6(nam)->sin6_addr)) {
SIN6(nam)->sin6_addr = in6addr_loopback;
}
}
ifscope = (inp->inp_flags & INP_BOUND_IF) ?
inp->inp_boundifp->if_index : IFSCOPE_NONE;
addr6 = in6_selectsrc(SIN6(nam), inp->in6p_outputopts, inp,
&inp->in6p_route, outif, &src_storage, ifscope, &error);
if (outif != NULL) {
struct rtentry *rt = inp->in6p_route.ro_rt;
if (rt != NULL && rt->rt_ifp != *outif) {
ifnet_reference(rt->rt_ifp);
if (*outif != NULL) {
ifnet_release(*outif);
}
*outif = rt->rt_ifp;
}
}
if (addr6 == NULL) {
if (outif != NULL && (*outif) != NULL &&
inp_restricted_send(inp, *outif)) {
soevent(inp->inp_socket,
(SO_FILT_HINT_LOCKED | SO_FILT_HINT_IFDENIED));
error = EHOSTUNREACH;
}
if (error == 0) {
error = EADDRNOTAVAIL;
}
return error;
}
*plocal_addr6 = *addr6;
return 0;
}
int
in6_pcbconnect(struct inpcb *inp, struct sockaddr *nam, struct proc *p)
{
struct in6_addr addr6;
struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)(void *)nam;
struct inpcb *pcb;
int error = 0;
struct ifnet *outif = NULL;
struct socket *so = inp->inp_socket;
#if CONTENT_FILTER
so->so_state_change_cnt++;
#endif
if (so->so_proto->pr_protocol == IPPROTO_UDP &&
sin6->sin6_port == htons(53) && !(so->so_flags1 & SOF1_DNS_COUNTED)) {
so->so_flags1 |= SOF1_DNS_COUNTED;
INC_ATOMIC_INT64_LIM(net_api_stats.nas_socket_inet_dgram_dns);
}
if ((error = in6_pcbladdr(inp, nam, &addr6, &outif)) != 0) {
if (outif != NULL && inp_restricted_send(inp, outif)) {
soevent(so,
(SO_FILT_HINT_LOCKED | SO_FILT_HINT_IFDENIED));
}
goto done;
}
socket_unlock(so, 0);
pcb = in6_pcblookup_hash(inp->inp_pcbinfo, &sin6->sin6_addr,
sin6->sin6_port, IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr) ?
&addr6 : &inp->in6p_laddr, inp->inp_lport, 0, NULL);
socket_lock(so, 0);
if (pcb != NULL) {
in_pcb_checkstate(pcb, WNT_RELEASE, pcb == inp ? 1 : 0);
error = EADDRINUSE;
goto done;
}
if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) {
if (inp->inp_lport == 0) {
error = in6_pcbbind(inp, NULL, p);
if (error) {
goto done;
}
}
inp->in6p_laddr = addr6;
inp->in6p_last_outifp = outif;
inp->in6p_flags |= INP_IN6ADDR_ANY;
}
if (!lck_rw_try_lock_exclusive(inp->inp_pcbinfo->ipi_lock)) {
socket_unlock(so, 0);
lck_rw_lock_exclusive(inp->inp_pcbinfo->ipi_lock);
socket_lock(so, 0);
}
inp->in6p_faddr = sin6->sin6_addr;
inp->inp_fport = sin6->sin6_port;
if (nstat_collect && SOCK_PROTO(so) == IPPROTO_UDP) {
nstat_pcb_invalidate_cache(inp);
}
in_pcbrehash(inp);
lck_rw_done(inp->inp_pcbinfo->ipi_lock);
done:
if (outif != NULL) {
ifnet_release(outif);
}
return error;
}
void
in6_pcbdisconnect(struct inpcb *inp)
{
struct socket *so = inp->inp_socket;
#if CONTENT_FILTER
if (so) {
so->so_state_change_cnt++;
}
#endif
if (!lck_rw_try_lock_exclusive(inp->inp_pcbinfo->ipi_lock)) {
socket_unlock(so, 0);
lck_rw_lock_exclusive(inp->inp_pcbinfo->ipi_lock);
socket_lock(so, 0);
}
if (nstat_collect && SOCK_PROTO(so) == IPPROTO_UDP) {
nstat_pcb_cache(inp);
}
bzero((caddr_t)&inp->in6p_faddr, sizeof(inp->in6p_faddr));
inp->inp_fport = 0;
inp->inp_flow &= ~IPV6_FLOWLABEL_MASK;
in_pcbrehash(inp);
lck_rw_done(inp->inp_pcbinfo->ipi_lock);
if (!(so->so_flags & SOF_MP_SUBFLOW) && (so->so_state & SS_NOFDREF)) {
in6_pcbdetach(inp);
}
}
void
in6_pcbdetach(struct inpcb *inp)
{
struct socket *so = inp->inp_socket;
if (so->so_pcb == NULL) {
panic("%s: inp=%p so=%p proto=%d so_pcb is null!\n", __func__,
inp, so, SOCK_PROTO(so));
}
#if IPSEC
if (inp->in6p_sp != NULL) {
(void) ipsec6_delete_pcbpolicy(inp);
}
#endif
if (inp->inp_stat != NULL && SOCK_PROTO(so) == IPPROTO_UDP) {
if (inp->inp_stat->rxpackets == 0 && inp->inp_stat->txpackets == 0) {
INC_ATOMIC_INT64_LIM(net_api_stats.nas_socket_inet6_dgram_no_data);
}
}
if (nstat_collect &&
(SOCK_PROTO(so) == IPPROTO_TCP || SOCK_PROTO(so) == IPPROTO_UDP)) {
nstat_pcb_detach(inp);
}
if (in_pcb_checkstate(inp, WNT_STOPUSING, 1) != WNT_STOPUSING) {
panic("%s: so=%p proto=%d couldn't set to STOPUSING\n",
__func__, so, SOCK_PROTO(so));
}
if (!(so->so_flags & SOF_PCBCLEARING)) {
struct ip_moptions *imo;
struct ip6_moptions *im6o;
inp->inp_vflag = 0;
if (inp->in6p_options != NULL) {
m_freem(inp->in6p_options);
inp->in6p_options = NULL;
}
ip6_freepcbopts(inp->in6p_outputopts);
inp->in6p_outputopts = NULL;
ROUTE_RELEASE(&inp->in6p_route);
if (inp->inp_options != NULL) {
(void) m_free(inp->inp_options);
inp->inp_options = NULL;
}
im6o = inp->in6p_moptions;
inp->in6p_moptions = NULL;
imo = inp->inp_moptions;
inp->inp_moptions = NULL;
sofreelastref(so, 0);
inp->inp_state = INPCB_STATE_DEAD;
so->so_flags |= SOF_PCBCLEARING;
inpcb_gc_sched(inp->inp_pcbinfo, INPCB_TIMER_FAST);
if (im6o != NULL || imo != NULL) {
socket_unlock(so, 0);
if (im6o != NULL) {
IM6O_REMREF(im6o);
}
if (imo != NULL) {
IMO_REMREF(imo);
}
socket_lock(so, 0);
}
}
}
struct sockaddr *
in6_sockaddr(in_port_t port, struct in6_addr *addr_p)
{
struct sockaddr_in6 *sin6;
MALLOC(sin6, struct sockaddr_in6 *, sizeof(*sin6), M_SONAME, M_WAITOK);
if (sin6 == NULL) {
return NULL;
}
bzero(sin6, sizeof(*sin6));
sin6->sin6_family = AF_INET6;
sin6->sin6_len = sizeof(*sin6);
sin6->sin6_port = port;
sin6->sin6_addr = *addr_p;
if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) {
sin6->sin6_scope_id = ntohs(sin6->sin6_addr.s6_addr16[1]);
} else {
sin6->sin6_scope_id = 0;
}
if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) {
sin6->sin6_addr.s6_addr16[1] = 0;
}
return (struct sockaddr *)sin6;
}
void
in6_sockaddr_s(in_port_t port, struct in6_addr *addr_p,
struct sockaddr_in6 *sin6)
{
bzero(sin6, sizeof(*sin6));
sin6->sin6_family = AF_INET6;
sin6->sin6_len = sizeof(*sin6);
sin6->sin6_port = port;
sin6->sin6_addr = *addr_p;
if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) {
sin6->sin6_scope_id = ntohs(sin6->sin6_addr.s6_addr16[1]);
} else {
sin6->sin6_scope_id = 0;
}
if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) {
sin6->sin6_addr.s6_addr16[1] = 0;
}
}
int
in6_getsockaddr(struct socket *so, struct sockaddr **nam)
{
struct inpcb *inp;
struct in6_addr addr;
in_port_t port;
if ((inp = sotoinpcb(so)) == NULL) {
return EINVAL;
}
port = inp->inp_lport;
addr = inp->in6p_laddr;
*nam = in6_sockaddr(port, &addr);
if (*nam == NULL) {
return ENOBUFS;
}
return 0;
}
int
in6_getsockaddr_s(struct socket *so, struct sockaddr_in6 *ss)
{
struct inpcb *inp;
struct in6_addr addr;
in_port_t port;
VERIFY(ss != NULL);
bzero(ss, sizeof(*ss));
if ((inp = sotoinpcb(so)) == NULL) {
return EINVAL;
}
port = inp->inp_lport;
addr = inp->in6p_laddr;
in6_sockaddr_s(port, &addr, ss);
return 0;
}
int
in6_getpeeraddr(struct socket *so, struct sockaddr **nam)
{
struct inpcb *inp;
struct in6_addr addr;
in_port_t port;
if ((inp = sotoinpcb(so)) == NULL) {
return EINVAL;
}
port = inp->inp_fport;
addr = inp->in6p_faddr;
*nam = in6_sockaddr(port, &addr);
if (*nam == NULL) {
return ENOBUFS;
}
return 0;
}
int
in6_mapped_sockaddr(struct socket *so, struct sockaddr **nam)
{
struct inpcb *inp = sotoinpcb(so);
int error;
if (inp == NULL) {
return EINVAL;
}
if (inp->inp_vflag & INP_IPV4) {
error = in_getsockaddr(so, nam);
if (error == 0) {
error = in6_sin_2_v4mapsin6_in_sock(nam);
}
} else {
error = in6_getsockaddr(so, nam);
}
return error;
}
int
in6_mapped_peeraddr(struct socket *so, struct sockaddr **nam)
{
struct inpcb *inp = sotoinpcb(so);
int error;
if (inp == NULL) {
return EINVAL;
}
if (inp->inp_vflag & INP_IPV4) {
error = in_getpeeraddr(so, nam);
if (error == 0) {
error = in6_sin_2_v4mapsin6_in_sock(nam);
}
} else {
error = in6_getpeeraddr(so, nam);
}
return error;
}
void
in6_pcbnotify(struct inpcbinfo *pcbinfo, struct sockaddr *dst, u_int fport_arg,
const struct sockaddr *src, u_int lport_arg, int cmd, void *cmdarg,
void (*notify)(struct inpcb *, int))
{
struct inpcbhead *head = pcbinfo->ipi_listhead;
struct inpcb *inp, *ninp;
struct sockaddr_in6 sa6_src, *sa6_dst;
uint16_t fport = (uint16_t)fport_arg, lport = (uint16_t)lport_arg;
u_int32_t flowinfo;
int errno;
if ((unsigned)cmd >= PRC_NCMDS || dst->sa_family != AF_INET6) {
return;
}
sa6_dst = (struct sockaddr_in6 *)(void *)dst;
if (IN6_IS_ADDR_UNSPECIFIED(&sa6_dst->sin6_addr)) {
return;
}
sa6_src = (src == NULL) ?
sa6_any : *(struct sockaddr_in6 *)(uintptr_t)(size_t)src;
flowinfo = sa6_src.sin6_flowinfo;
if (PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) {
fport = 0;
lport = 0;
bzero((caddr_t)&sa6_src.sin6_addr, sizeof(sa6_src.sin6_addr));
if (cmd != PRC_HOSTDEAD) {
notify = in6_rtchange;
}
}
errno = inet6ctlerrmap[cmd];
lck_rw_lock_shared(pcbinfo->ipi_lock);
for (inp = LIST_FIRST(head); inp != NULL; inp = ninp) {
ninp = LIST_NEXT(inp, inp_list);
if (!(inp->inp_vflag & INP_IPV6)) {
continue;
}
if (cmd == PRC_MSGSIZE && cmdarg != NULL) {
socket_lock(inp->inp_socket, 1);
ip6_notify_pmtu(inp, (struct sockaddr_in6 *)(void *)dst,
(u_int32_t *)cmdarg);
socket_unlock(inp->inp_socket, 1);
}
if (lport == 0 && fport == 0 && flowinfo &&
inp->inp_socket != NULL &&
flowinfo == (inp->inp_flow & IPV6_FLOWLABEL_MASK) &&
IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, &sa6_src.sin6_addr)) {
goto do_notify;
} else if (!IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr,
&sa6_dst->sin6_addr) || inp->inp_socket == NULL ||
(lport && inp->inp_lport != lport) ||
(!IN6_IS_ADDR_UNSPECIFIED(&sa6_src.sin6_addr) &&
!IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr,
&sa6_src.sin6_addr)) || (fport && inp->inp_fport != fport)) {
continue;
}
do_notify:
if (notify) {
if (in_pcb_checkstate(inp, WNT_ACQUIRE, 0) ==
WNT_STOPUSING) {
continue;
}
socket_lock(inp->inp_socket, 1);
(*notify)(inp, errno);
(void) in_pcb_checkstate(inp, WNT_RELEASE, 1);
socket_unlock(inp->inp_socket, 1);
}
}
lck_rw_done(pcbinfo->ipi_lock);
}
struct inpcb *
in6_pcblookup_local(struct inpcbinfo *pcbinfo, struct in6_addr *laddr,
u_int lport_arg, int wild_okay)
{
struct inpcb *inp;
int matchwild = 3, wildcard;
uint16_t lport = (uint16_t)lport_arg;
struct inpcbporthead *porthash;
struct inpcb *match = NULL;
struct inpcbport *phd;
if (!wild_okay) {
struct inpcbhead *head;
head = &pcbinfo->ipi_hashbase[INP_PCBHASH(INADDR_ANY, lport, 0,
pcbinfo->ipi_hashmask)];
LIST_FOREACH(inp, head, inp_hash) {
if (!(inp->inp_vflag & INP_IPV6)) {
continue;
}
if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) &&
IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) &&
inp->inp_lport == lport) {
return inp;
}
}
return NULL;
}
porthash = &pcbinfo->ipi_porthashbase[INP_PCBPORTHASH(lport,
pcbinfo->ipi_porthashmask)];
LIST_FOREACH(phd, porthash, phd_hash) {
if (phd->phd_port == lport) {
break;
}
}
if (phd != NULL) {
LIST_FOREACH(inp, &phd->phd_pcblist, inp_portlist) {
wildcard = 0;
if (!(inp->inp_vflag & INP_IPV6)) {
continue;
}
if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) {
wildcard++;
}
if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) {
if (IN6_IS_ADDR_UNSPECIFIED(laddr)) {
wildcard++;
} else if (!IN6_ARE_ADDR_EQUAL(
&inp->in6p_laddr, laddr)) {
continue;
}
} else {
if (!IN6_IS_ADDR_UNSPECIFIED(laddr)) {
wildcard++;
}
}
if (wildcard < matchwild) {
match = inp;
matchwild = wildcard;
if (matchwild == 0) {
break;
}
}
}
}
return match;
}
void
in6_losing(struct inpcb *in6p)
{
struct rtentry *rt;
if ((rt = in6p->in6p_route.ro_rt) != NULL) {
RT_LOCK(rt);
if (rt->rt_flags & RTF_DYNAMIC) {
rt->rt_flags |= RTF_CONDEMNED;
RT_UNLOCK(rt);
(void) rtrequest(RTM_DELETE, rt_key(rt),
rt->rt_gateway, rt_mask(rt), rt->rt_flags, NULL);
} else {
RT_UNLOCK(rt);
}
}
ROUTE_RELEASE(&in6p->in6p_route);
}
void
in6_rtchange(struct inpcb *inp, int errno)
{
#pragma unused(errno)
ROUTE_RELEASE(&inp->in6p_route);
}
int
in6_pcblookup_hash_exists(struct inpcbinfo *pcbinfo, struct in6_addr *faddr,
u_int fport_arg, struct in6_addr *laddr, u_int lport_arg, int wildcard,
uid_t *uid, gid_t *gid, struct ifnet *ifp)
{
struct inpcbhead *head;
struct inpcb *inp;
uint16_t fport = (uint16_t)fport_arg, lport = (uint16_t)lport_arg;
int found;
*uid = UID_MAX;
*gid = GID_MAX;
lck_rw_lock_shared(pcbinfo->ipi_lock);
head = &pcbinfo->ipi_hashbase[INP_PCBHASH(faddr->s6_addr32[3] ,
lport, fport, pcbinfo->ipi_hashmask)];
LIST_FOREACH(inp, head, inp_hash) {
if (!(inp->inp_vflag & INP_IPV6)) {
continue;
}
if (inp_restricted_recv(inp, ifp)) {
continue;
}
#if NECP
if (!necp_socket_is_allowed_to_recv_on_interface(inp, ifp)) {
continue;
}
#endif
if (IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, faddr) &&
IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) &&
inp->inp_fport == fport &&
inp->inp_lport == lport) {
if ((found = (inp->inp_socket != NULL))) {
*uid = kauth_cred_getuid(
inp->inp_socket->so_cred);
*gid = kauth_cred_getgid(
inp->inp_socket->so_cred);
}
lck_rw_done(pcbinfo->ipi_lock);
return found;
}
}
if (wildcard) {
struct inpcb *local_wild = NULL;
head = &pcbinfo->ipi_hashbase[INP_PCBHASH(INADDR_ANY, lport, 0,
pcbinfo->ipi_hashmask)];
LIST_FOREACH(inp, head, inp_hash) {
if (!(inp->inp_vflag & INP_IPV6)) {
continue;
}
if (inp_restricted_recv(inp, ifp)) {
continue;
}
#if NECP
if (!necp_socket_is_allowed_to_recv_on_interface(inp, ifp)) {
continue;
}
#endif
if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) &&
inp->inp_lport == lport) {
if (IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr,
laddr)) {
found = (inp->inp_socket != NULL);
if (found) {
*uid = kauth_cred_getuid(
inp->inp_socket->so_cred);
*gid = kauth_cred_getgid(
inp->inp_socket->so_cred);
}
lck_rw_done(pcbinfo->ipi_lock);
return found;
} else if (IN6_IS_ADDR_UNSPECIFIED(
&inp->in6p_laddr)) {
local_wild = inp;
}
}
}
if (local_wild) {
if ((found = (local_wild->inp_socket != NULL))) {
*uid = kauth_cred_getuid(
local_wild->inp_socket->so_cred);
*gid = kauth_cred_getgid(
local_wild->inp_socket->so_cred);
}
lck_rw_done(pcbinfo->ipi_lock);
return found;
}
}
lck_rw_done(pcbinfo->ipi_lock);
return 0;
}
struct inpcb *
in6_pcblookup_hash(struct inpcbinfo *pcbinfo, struct in6_addr *faddr,
u_int fport_arg, struct in6_addr *laddr, u_int lport_arg, int wildcard,
struct ifnet *ifp)
{
struct inpcbhead *head;
struct inpcb *inp;
uint16_t fport = (uint16_t)fport_arg, lport = (uint16_t)lport_arg;
lck_rw_lock_shared(pcbinfo->ipi_lock);
head = &pcbinfo->ipi_hashbase[INP_PCBHASH(faddr->s6_addr32[3] ,
lport, fport, pcbinfo->ipi_hashmask)];
LIST_FOREACH(inp, head, inp_hash) {
if (!(inp->inp_vflag & INP_IPV6)) {
continue;
}
if (inp_restricted_recv(inp, ifp)) {
continue;
}
#if NECP
if (!necp_socket_is_allowed_to_recv_on_interface(inp, ifp)) {
continue;
}
#endif
if (IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, faddr) &&
IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) &&
inp->inp_fport == fport &&
inp->inp_lport == lport) {
if (in_pcb_checkstate(inp, WNT_ACQUIRE, 0) !=
WNT_STOPUSING) {
lck_rw_done(pcbinfo->ipi_lock);
return inp;
} else {
lck_rw_done(pcbinfo->ipi_lock);
return NULL;
}
}
}
if (wildcard) {
struct inpcb *local_wild = NULL;
head = &pcbinfo->ipi_hashbase[INP_PCBHASH(INADDR_ANY, lport, 0,
pcbinfo->ipi_hashmask)];
LIST_FOREACH(inp, head, inp_hash) {
if (!(inp->inp_vflag & INP_IPV6)) {
continue;
}
if (inp_restricted_recv(inp, ifp)) {
continue;
}
#if NECP
if (!necp_socket_is_allowed_to_recv_on_interface(inp, ifp)) {
continue;
}
#endif
if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) &&
inp->inp_lport == lport) {
if (IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr,
laddr)) {
if (in_pcb_checkstate(inp, WNT_ACQUIRE,
0) != WNT_STOPUSING) {
lck_rw_done(pcbinfo->ipi_lock);
return inp;
} else {
lck_rw_done(pcbinfo->ipi_lock);
return NULL;
}
} else if (IN6_IS_ADDR_UNSPECIFIED(
&inp->in6p_laddr)) {
local_wild = inp;
}
}
}
if (local_wild && in_pcb_checkstate(local_wild,
WNT_ACQUIRE, 0) != WNT_STOPUSING) {
lck_rw_done(pcbinfo->ipi_lock);
return local_wild;
} else {
lck_rw_done(pcbinfo->ipi_lock);
return NULL;
}
}
lck_rw_done(pcbinfo->ipi_lock);
return NULL;
}
void
init_sin6(struct sockaddr_in6 *sin6, struct mbuf *m)
{
struct ip6_hdr *ip;
ip = mtod(m, struct ip6_hdr *);
bzero(sin6, sizeof(*sin6));
sin6->sin6_len = sizeof(*sin6);
sin6->sin6_family = AF_INET6;
sin6->sin6_addr = ip->ip6_src;
if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) {
sin6->sin6_addr.s6_addr16[1] = 0;
if ((m->m_pkthdr.pkt_flags & (PKTF_LOOP | PKTF_IFAINFO)) ==
(PKTF_LOOP | PKTF_IFAINFO)) {
sin6->sin6_scope_id = m->m_pkthdr.src_ifindex;
} else if (m->m_pkthdr.rcvif != NULL) {
sin6->sin6_scope_id = m->m_pkthdr.rcvif->if_index;
}
}
}
void
in6p_route_copyout(struct inpcb *inp, struct route_in6 *dst)
{
struct route_in6 *src = &inp->in6p_route;
socket_lock_assert_owned(inp->inp_socket);
if (src->ro_rt != NULL && rt_key(src->ro_rt)->sa_family != AF_INET6) {
panic("%s: wrong or corrupted route: %p", __func__, src);
}
route_copyout((struct route *)dst, (struct route *)src, sizeof(*dst));
}
void
in6p_route_copyin(struct inpcb *inp, struct route_in6 *src)
{
struct route_in6 *dst = &inp->in6p_route;
socket_lock_assert_owned(inp->inp_socket);
if (src->ro_rt != NULL && rt_key(src->ro_rt)->sa_family != AF_INET6) {
panic("%s: wrong or corrupted route: %p", __func__, src);
}
route_copyin((struct route *)src, (struct route *)dst, sizeof(*src));
}