/*
- * Copyright (c) 2000-2008 Apple Inc. All rights reserved.
+ * Copyright (c) 2000-2011 Apple Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
#endif
#include <sys/kernel.h>
#include <sys/sysctl.h>
+#include <sys/mcache.h>
+#include <sys/kauth.h>
+#include <sys/priv.h>
#include <libkern/OSAtomic.h>
#include <machine/limits.h>
#endif /* IPSEC */
#include <sys/kdebug.h>
+#include <sys/random.h>
#if IPSEC
extern int ipsec_bypass;
#endif
-extern u_long route_generation;
-
#define DBG_FNC_PCB_LOOKUP NETDBG_CODE(DBG_NETTCP, (6 << 8))
#define DBG_FNC_PCB_HLOOKUP NETDBG_CODE(DBG_NETTCP, ((6 << 8) | 1))
SYSCTL_NODE(_net_inet_ip, IPPROTO_IP, portrange, CTLFLAG_RW|CTLFLAG_LOCKED, 0, "IP Ports");
-SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, lowfirst, CTLTYPE_INT|CTLFLAG_RW,
+SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, lowfirst, CTLTYPE_INT|CTLFLAG_RW | CTLFLAG_LOCKED,
&ipport_lowfirstauto, 0, &sysctl_net_ipport_check, "I", "");
-SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, lowlast, CTLTYPE_INT|CTLFLAG_RW,
+SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, lowlast, CTLTYPE_INT|CTLFLAG_RW | CTLFLAG_LOCKED,
&ipport_lowlastauto, 0, &sysctl_net_ipport_check, "I", "");
-SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, first, CTLTYPE_INT|CTLFLAG_RW,
+SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, first, CTLTYPE_INT|CTLFLAG_RW | CTLFLAG_LOCKED,
&ipport_firstauto, 0, &sysctl_net_ipport_check, "I", "");
-SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, last, CTLTYPE_INT|CTLFLAG_RW,
+SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, last, CTLTYPE_INT|CTLFLAG_RW | CTLFLAG_LOCKED,
&ipport_lastauto, 0, &sysctl_net_ipport_check, "I", "");
-SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, hifirst, CTLTYPE_INT|CTLFLAG_RW,
+SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, hifirst, CTLTYPE_INT|CTLFLAG_RW | CTLFLAG_LOCKED,
&ipport_hifirstauto, 0, &sysctl_net_ipport_check, "I", "");
-SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, hilast, CTLTYPE_INT|CTLFLAG_RW,
+SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, hilast, CTLTYPE_INT|CTLFLAG_RW | CTLFLAG_LOCKED,
&ipport_hilastauto, 0, &sysctl_net_ipport_check, "I", "");
+extern int udp_use_randomport;
+extern int tcp_use_randomport;
+
/*
* in_pcb.c: manage the Protocol Control Blocks.
*
}
mac_inpcb_label_associate(so, inp);
#endif
-#if CONFIG_IP_EDGEHOLE
- ip_edgehole_attach(inp);
-#endif
+ // make sure inp_stat is always 64bit aligned
+ inp->inp_stat = (struct inp_stat*)P2ROUNDUP(inp->inp_stat_store, sizeof(u_int64_t));
+ if (((uintptr_t)inp->inp_stat - (uintptr_t)inp->inp_stat_store)
+ + sizeof(*inp->inp_stat) > sizeof(inp->inp_stat_store)) {
+ panic("insufficient space to align inp_stat");
+ }
+
so->so_pcb = (caddr_t)inp;
if (so->so_proto->pr_flags & PR_PCBLOCK) {
- inp->inpcb_mtx = lck_mtx_alloc_init(pcbinfo->mtx_grp, pcbinfo->mtx_attr);
- if (inp->inpcb_mtx == NULL) {
- printf("in_pcballoc: can't alloc mutex! so=%p\n", so);
- return(ENOMEM);
- }
+ lck_mtx_init(&inp->inpcb_mtx, pcbinfo->mtx_grp, pcbinfo->mtx_attr);
}
#if IPSEC
if (inp && inp->inp_wantcnt == WNT_STOPUSING) {
struct socket *so = inp->inp_socket;
- lck_mtx_lock(inp->inpcb_mtx);
+ lck_mtx_lock(&inp->inpcb_mtx);
if (so->so_usecount == 0) {
+ if (inp->inp_state != INPCB_STATE_DEAD)
+ in_pcbdetach(inp);
in_pcbdispose(inp);
inp = NULL;
}
else {
- lck_mtx_unlock(inp->inpcb_mtx);
+ lck_mtx_unlock(&inp->inpcb_mtx);
}
}
struct kev_msg ev_msg;
struct kev_in_portinuse in_portinuse;
+ bzero(&in_portinuse, sizeof(struct kev_in_portinuse));
+ bzero(&ev_msg, sizeof(struct kev_msg));
in_portinuse.port = ntohs(port); /* port in host order */
in_portinuse.req_pid = proc_selfpid();
ev_msg.vendor_code = KEV_VENDOR_APPLE;
* EACCES Permission denied
* EADDRINUSE Address in use
* EAGAIN Resource unavailable, try again
- * proc_suser:EPERM Operation not permitted
+ * priv_check_cred:EPERM Operation not permitted
*/
int
in_pcbbind(struct inpcb *inp, struct sockaddr *nam, struct proc *p)
unsigned short *lastport;
struct sockaddr_in *sin;
struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
- u_short lport = 0;
+ u_short lport = 0, rand_port = 0;
int wild = 0, reuseport = (so->so_options & SO_REUSEPORT);
- int error, conflict = 0;
+ int error, randomport, conflict = 0;
+ kauth_cred_t cred;
if (TAILQ_EMPTY(&in_ifaddrhead)) /* XXX broken! */
return (EADDRNOTAVAIL);
socket_unlock(so, 0); /* keep reference on socket */
lck_rw_lock_exclusive(pcbinfo->mtx);
if (nam) {
+ unsigned int outif = 0;
+
sin = (struct sockaddr_in *)nam;
if (nam->sa_len != sizeof (*sin)) {
lck_rw_done(pcbinfo->mtx);
return (EADDRNOTAVAIL);
}
else {
- ifafree(ifa);
+ IFA_LOCK(ifa);
+ outif = ifa->ifa_ifp->if_index;
+ IFA_UNLOCK(ifa);
+ IFA_REMREF(ifa);
}
}
if (lport) {
struct inpcb *t;
/* GROSS */
- if (ntohs(lport) < IPPORT_RESERVED && p &&
- proc_suser(p)) {
- lck_rw_done(pcbinfo->mtx);
- socket_lock(so, 0);
- return (EACCES);
+#if !CONFIG_EMBEDDED
+ if (ntohs(lport) < IPPORT_RESERVED) {
+ 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->mtx);
+ socket_lock(so, 0);
+ return (EACCES);
+ }
}
+#endif
if (so->so_uid &&
!IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
t = in_pcblookup_local_and_cleanup(inp->inp_pcbinfo,
}
}
inp->inp_laddr = sin->sin_addr;
+ inp->inp_last_outif = outif;
}
if (lport == 0) {
u_short first, last;
int count;
+ randomport = (so->so_flags & SOF_BINDRANDOMPORT) ||
+ (so->so_type == SOCK_STREAM ? tcp_use_randomport : udp_use_randomport);
+
inp->inp_flags |= INP_ANONPORT;
if (inp->inp_flags & INP_HIGHPORT) {
last = ipport_hilastauto;
lastport = &pcbinfo->lasthi;
} else if (inp->inp_flags & INP_LOWPORT) {
- if (p && (error = proc_suser(p))) {
+ 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->mtx);
socket_lock(so, 0);
return error;
last = ipport_lastauto;
lastport = &pcbinfo->lastport;
}
+ /* No point in randomizing if only one port is available */
+
+ if (first == last)
+ randomport = 0;
/*
* Simple check to ensure all ports are not used up causing
* a deadlock here.
/*
* counting down
*/
+ if (randomport) {
+ read_random(&rand_port, sizeof(rand_port));
+ *lastport = first - (rand_port % (first - last));
+ }
count = first - last;
do {
lck_rw_done(pcbinfo->mtx);
socket_lock(so, 0);
inp->inp_laddr.s_addr = INADDR_ANY;
+ inp->inp_last_outif = 0;
return (EADDRNOTAVAIL);
}
--*lastport;
/*
* counting up
*/
+ if (randomport) {
+ read_random(&rand_port, sizeof(rand_port));
+ *lastport = first + (rand_port % (first - last));
+ }
count = last - first;
do {
lck_rw_done(pcbinfo->mtx);
socket_lock(so, 0);
inp->inp_laddr.s_addr = INADDR_ANY;
+ inp->inp_last_outif = 0;
return (EADDRNOTAVAIL);
}
++*lastport;
if (in_pcbinshash(inp, 1) != 0) {
inp->inp_laddr.s_addr = INADDR_ANY;
inp->inp_lport = 0;
+ inp->inp_last_outif = 0;
lck_rw_done(pcbinfo->mtx);
return (EAGAIN);
}
*/
int
in_pcbladdr(struct inpcb *inp, struct sockaddr *nam,
- struct sockaddr_in **plocal_sin)
+ struct sockaddr_in *plocal_sin, unsigned int *out_ifscope)
{
struct in_ifaddr *ia;
struct sockaddr_in *sin = (struct sockaddr_in *)nam;
return (EAFNOSUPPORT);
if (sin->sin_port == 0)
return (EADDRNOTAVAIL);
-
- lck_mtx_lock(rt_mtx);
-
+
+ lck_rw_lock_shared(in_ifaddr_rwlock);
if (!TAILQ_EMPTY(&in_ifaddrhead)) {
+ ia = TAILQ_FIRST(&in_ifaddrhead);
/*
* If the destination address is INADDR_ANY,
* use the primary local address.
#define satosin(sa) ((struct sockaddr_in *)(sa))
#define sintosa(sin) ((struct sockaddr *)(sin))
#define ifatoia(ifa) ((struct in_ifaddr *)(ifa))
+ IFA_LOCK_SPIN(&ia->ia_ifa);
if (sin->sin_addr.s_addr == INADDR_ANY)
- sin->sin_addr = IA_SIN(TAILQ_FIRST(&in_ifaddrhead))->sin_addr;
- else if (sin->sin_addr.s_addr == (u_long)INADDR_BROADCAST &&
- (TAILQ_FIRST(&in_ifaddrhead)->ia_ifp->if_flags & IFF_BROADCAST))
- sin->sin_addr = satosin(&TAILQ_FIRST(&in_ifaddrhead)->ia_broadaddr)->sin_addr;
+ sin->sin_addr = IA_SIN(ia)->sin_addr;
+ else if (sin->sin_addr.s_addr == (u_int32_t)INADDR_BROADCAST &&
+ (ia->ia_ifp->if_flags & IFF_BROADCAST))
+ sin->sin_addr = satosin(&ia->ia_broadaddr)->sin_addr;
+ IFA_UNLOCK(&ia->ia_ifa);
+ ia = NULL;
}
+ lck_rw_done(in_ifaddr_rwlock);
+
if (inp->inp_laddr.s_addr == INADDR_ANY) {
struct route *ro;
- unsigned int ifscope;
-
+ unsigned int ifscope = IFSCOPE_NONE;
+ unsigned int nocell;
+ /*
+ * If the socket is bound to a specifc interface, the
+ * optional scoped takes precedence over that if it
+ * is set by the caller.
+ */
ia = (struct in_ifaddr *)0;
- ifscope = (inp->inp_flags & INP_BOUND_IF) ?
- inp->inp_boundif : IFSCOPE_NONE;
+
+ if (out_ifscope != NULL && *out_ifscope != IFSCOPE_NONE)
+ ifscope = *out_ifscope;
+ else if (inp->inp_flags & INP_BOUND_IF)
+ ifscope = inp->inp_boundif;
+
+ nocell = (inp->inp_flags & INP_NO_IFT_CELLULAR) ? 1 : 0;
/*
* If route is known or can be allocated now,
* our src addr is taken from the i/f, else punt.
* destination, in case of sharing the cache with IPv6.
*/
ro = &inp->inp_route;
- if (ro->ro_rt &&
- (ro->ro_dst.sa_family != AF_INET ||
- satosin(&ro->ro_dst)->sin_addr.s_addr !=
- sin->sin_addr.s_addr ||
- inp->inp_socket->so_options & SO_DONTROUTE ||
+ if (ro->ro_rt != NULL)
+ RT_LOCK_SPIN(ro->ro_rt);
+ if (ro->ro_rt && (ro->ro_dst.sa_family != AF_INET ||
+ satosin(&ro->ro_dst)->sin_addr.s_addr !=
+ sin->sin_addr.s_addr ||
+ inp->inp_socket->so_options & SO_DONTROUTE ||
ro->ro_rt->generation_id != route_generation)) {
- rtfree_locked(ro->ro_rt);
- ro->ro_rt = (struct rtentry *)0;
+ RT_UNLOCK(ro->ro_rt);
+ rtfree(ro->ro_rt);
+ ro->ro_rt = NULL;
}
if ((inp->inp_socket->so_options & SO_DONTROUTE) == 0 && /*XXX*/
- (ro->ro_rt == (struct rtentry *)0 ||
- ro->ro_rt->rt_ifp == 0)) {
+ (ro->ro_rt == NULL || ro->ro_rt->rt_ifp == NULL)) {
+ if (ro->ro_rt != NULL)
+ RT_UNLOCK(ro->ro_rt);
/* No route yet, so try to acquire one */
bzero(&ro->ro_dst, sizeof(struct sockaddr_in));
ro->ro_dst.sa_family = AF_INET;
ro->ro_dst.sa_len = sizeof(struct sockaddr_in);
((struct sockaddr_in *) &ro->ro_dst)->sin_addr =
sin->sin_addr;
- rtalloc_scoped_ign_locked(ro, 0UL, ifscope);
+ rtalloc_scoped(ro, ifscope);
+ if (ro->ro_rt != NULL)
+ RT_LOCK_SPIN(ro->ro_rt);
+ }
+ /*
+ * If the route points to a cellular interface and the
+ * caller forbids our using interfaces of such type,
+ * pretend that there is no route.
+ */
+ if (nocell && ro->ro_rt != NULL) {
+ RT_LOCK_ASSERT_HELD(ro->ro_rt);
+ if (ro->ro_rt->rt_ifp->if_type == IFT_CELLULAR) {
+ RT_UNLOCK(ro->ro_rt);
+ rtfree(ro->ro_rt);
+ ro->ro_rt = NULL;
+ }
}
/*
* If we found a route, use the address
* unless it is the loopback (in case a route
* to our address on another net goes to loopback).
*/
- if (ro->ro_rt && !(ro->ro_rt->rt_ifp->if_flags & IFF_LOOPBACK)) {
- ia = ifatoia(ro->ro_rt->rt_ifa);
- if (ia)
- ifaref(&ia->ia_ifa);
+ if (ro->ro_rt != NULL) {
+ /* Become a regular mutex */
+ RT_CONVERT_LOCK(ro->ro_rt);
+ if (!(ro->ro_rt->rt_ifp->if_flags & IFF_LOOPBACK)) {
+ ia = ifatoia(ro->ro_rt->rt_ifa);
+ if (ia) {
+ IFA_ADDREF(&ia->ia_ifa);
+ }
+ }
+ RT_UNLOCK(ro->ro_rt);
}
if (ia == 0) {
u_short fport = sin->sin_port;
}
sin->sin_port = fport;
if (ia == 0) {
+ lck_rw_lock_shared(in_ifaddr_rwlock);
ia = TAILQ_FIRST(&in_ifaddrhead);
if (ia)
- ifaref(&ia->ia_ifa);
+ IFA_ADDREF(&ia->ia_ifa);
+ lck_rw_done(in_ifaddr_rwlock);
}
- if (ia == 0) {
- lck_mtx_unlock(rt_mtx);
- return (EADDRNOTAVAIL);
+ /*
+ * If the source address belongs to a cellular interface
+ * and the socket forbids our using interfaces of such
+ * type, pretend that there is no source address.
+ */
+ if (nocell && ia != NULL &&
+ ia->ia_ifa.ifa_ifp->if_type == IFT_CELLULAR) {
+ IFA_REMREF(&ia->ia_ifa);
+ ia = NULL;
}
+ if (ia == 0)
+ return (EADDRNOTAVAIL);
}
/*
* If the destination address is multicast and an outgoing
struct ifnet *ifp;
imo = inp->inp_moptions;
+ IMO_LOCK(imo);
if (imo->imo_multicast_ifp != NULL && (ia == NULL ||
ia->ia_ifp != imo->imo_multicast_ifp)) {
ifp = imo->imo_multicast_ifp;
if (ia)
- ifafree(&ia->ia_ifa);
- TAILQ_FOREACH(ia, &in_ifaddrhead, ia_link)
+ IFA_REMREF(&ia->ia_ifa);
+ lck_rw_lock_shared(in_ifaddr_rwlock);
+ TAILQ_FOREACH(ia, &in_ifaddrhead, ia_link) {
if (ia->ia_ifp == ifp)
break;
+ }
+ if (ia)
+ IFA_ADDREF(&ia->ia_ifa);
+ lck_rw_done(in_ifaddr_rwlock);
if (ia == 0) {
- lck_mtx_unlock(rt_mtx);
+ IMO_UNLOCK(imo);
return (EADDRNOTAVAIL);
}
- ifaref(&ia->ia_ifa);
}
+ IMO_UNLOCK(imo);
}
/*
* Don't do pcblookup call here; return interface in plocal_sin
* and exit to caller, that will do the lookup.
*/
- *plocal_sin = &ia->ia_addr;
- ifafree(&ia->ia_ifa);
+ IFA_LOCK_SPIN(&ia->ia_ifa);
+ *plocal_sin = ia->ia_addr;
+ if (out_ifscope != NULL)
+ *out_ifscope = ia->ia_ifp->if_index;
+ IFA_UNLOCK(&ia->ia_ifa);
+ IFA_REMREF(&ia->ia_ifa);
}
- lck_mtx_unlock(rt_mtx);
return(0);
}
* then pick one.
*/
int
-in_pcbconnect(struct inpcb *inp, struct sockaddr *nam, struct proc *p)
+in_pcbconnect(struct inpcb *inp, struct sockaddr *nam, struct proc *p, unsigned int *ifscope)
{
- struct sockaddr_in *ifaddr;
+ struct sockaddr_in ifaddr;
struct sockaddr_in *sin = (struct sockaddr_in *)nam;
struct inpcb *pcb;
int error;
/*
* Call inner routine, to assign local interface address.
*/
- if ((error = in_pcbladdr(inp, nam, &ifaddr)) != 0)
+ if ((error = in_pcbladdr(inp, nam, &ifaddr, ifscope)) != 0)
return(error);
socket_unlock(inp->inp_socket, 0);
pcb = in_pcblookup_hash(inp->inp_pcbinfo, sin->sin_addr, sin->sin_port,
- inp->inp_laddr.s_addr ? inp->inp_laddr : ifaddr->sin_addr,
+ inp->inp_laddr.s_addr ? inp->inp_laddr : ifaddr.sin_addr,
inp->inp_lport, 0, NULL);
socket_lock(inp->inp_socket, 0);
+
+ /* Check if the socket is still in a valid state. When we unlock this
+ * embryonic socket, it can get aborted if another thread is closing
+ * the listener (radar 7947600).
+ */
+ if ((inp->inp_socket->so_flags & SOF_ABORTED) != 0) {
+ return ECONNREFUSED;
+ }
+
if (pcb != NULL) {
- in_pcb_checkstate(pcb, WNT_RELEASE, 0);
+ in_pcb_checkstate(pcb, WNT_RELEASE, pcb == inp ? 1 : 0);
return (EADDRINUSE);
}
if (inp->inp_laddr.s_addr == INADDR_ANY) {
lck_rw_lock_exclusive(inp->inp_pcbinfo->mtx);
socket_lock(inp->inp_socket, 0);
}
- inp->inp_laddr = ifaddr->sin_addr;
+ inp->inp_laddr = ifaddr.sin_addr;
+ inp->inp_last_outif = ifscope ? *ifscope : IFSCOPE_NONE;
inp->inp_flags |= INP_INADDR_ANY;
}
else {
#endif
if ((so->so_flags & SOF_PCBCLEARING) == 0) {
struct rtentry *rt;
+ struct ip_moptions *imo;
inp->inp_vflag = 0;
if (inp->inp_options)
(void)m_free(inp->inp_options);
- lck_mtx_lock(rt_mtx);
if ((rt = inp->inp_route.ro_rt) != NULL) {
inp->inp_route.ro_rt = NULL;
- rtfree_locked(rt);
+ rtfree(rt);
}
- lck_mtx_unlock(rt_mtx);
- ip_freemoptions(inp->inp_moptions);
+ imo = inp->inp_moptions;
inp->inp_moptions = NULL;
+ if (imo != NULL)
+ IMO_REMREF(imo);
sofreelastref(so, 0);
inp->inp_state = INPCB_STATE_DEAD;
so->so_flags |= SOF_PCBCLEARING; /* makes sure we're not called twice from so_close */
printf("in_pcbdispose: not dead yet? so=%p\n", so);
}
#endif
-
if (so && so->so_usecount != 0)
- panic("in_pcbdispose: use count=%x so=%p\n", so->so_usecount, so);
+ panic("%s: so %p so_usecount %d so_lockhistory %s\n",
+ __func__, so, so->so_usecount,
+ (so != NULL) ? solockhistory_nr(so) : "--");
lck_rw_assert(ipi->mtx, LCK_RW_ASSERT_EXCLUSIVE);
}
if (so->so_head != NULL)
panic("in_pcbdispose, so=%p head still exist\n", so);
- lck_mtx_unlock(inp->inpcb_mtx);
- lck_mtx_free(inp->inpcb_mtx, ipi->mtx_grp);
+ lck_mtx_unlock(&inp->inpcb_mtx);
+ lck_mtx_destroy(&inp->inpcb_mtx, ipi->mtx_grp);
}
so->so_flags |= SOF_PCBCLEARING; /* makes sure we're not called twice from so_close */
so->so_saved_pcb = (caddr_t) inp;
#if CONFIG_MACF_NET
mac_inpcb_label_destroy(inp);
#endif
+ /*
+ * In case there a route cached after a detach (possible
+ * in the tcp case), make sure that it is freed before
+ * we deallocate the structure.
+ */
+ if (inp->inp_route.ro_rt != NULL) {
+ rtfree(inp->inp_route.ro_rt);
+ inp->inp_route.ro_rt = NULL;
+ }
if (so->cached_in_sock_layer == 0) {
zfree(ipi->ipi_zone, inp);
}
lck_rw_done(pcbinfo->mtx);
}
-void
-in_pcbpurgeif0(
- struct inpcb *head,
- struct ifnet *ifp)
-{
- struct inpcb *inp;
- struct ip_moptions *imo;
- int i, gap;
-
- for (inp = head; inp != NULL; inp = LIST_NEXT(inp, inp_list)) {
- imo = inp->inp_moptions;
- if ((inp->inp_vflag & INP_IPV4) &&
- imo != NULL) {
- /*
- * Unselect the outgoing interface if it is being
- * detached.
- */
- if (imo->imo_multicast_ifp == ifp)
- imo->imo_multicast_ifp = NULL;
-
- /*
- * Drop multicast group membership if we joined
- * through the interface being detached.
- */
- for (i = 0, gap = 0; i < imo->imo_num_memberships;
- i++) {
- if (imo->imo_membership[i]->inm_ifp == ifp) {
- in_delmulti(&imo->imo_membership[i]);
- gap++;
- } else if (gap != 0)
- imo->imo_membership[i - gap] =
- imo->imo_membership[i];
- }
- imo->imo_num_memberships -= gap;
- }
- }
-}
-
/*
* Check for alternatives when higher level complains
* about service problems. For now, invalidate cached
struct rtentry *rt;
struct rt_addrinfo info;
- if ((rt = inp->inp_route.ro_rt)) {
- lck_mtx_lock(rt_mtx);
- /* Check again, this time while holding the lock */
- if ((rt = inp->inp_route.ro_rt) == NULL) {
- lck_mtx_unlock(rt_mtx);
- return;
- }
+ if ((rt = inp->inp_route.ro_rt) != NULL) {
+ struct in_ifaddr *ia;
+
bzero((caddr_t)&info, sizeof(info));
+ RT_LOCK(rt);
info.rti_info[RTAX_DST] =
(struct sockaddr *)&inp->inp_route.ro_dst;
info.rti_info[RTAX_GATEWAY] = rt->rt_gateway;
info.rti_info[RTAX_NETMASK] = rt_mask(rt);
rt_missmsg(RTM_LOSING, &info, rt->rt_flags, 0);
- if (rt->rt_flags & RTF_DYNAMIC)
- (void) rtrequest_locked(RTM_DELETE, rt_key(rt),
+ if (rt->rt_flags & RTF_DYNAMIC) {
+ /*
+ * Prevent another thread from modifying rt_key,
+ * rt_gateway via rt_setgate() after rt_lock is
+ * dropped by marking the route as defunct.
+ */
+ rt->rt_flags |= RTF_CONDEMNED;
+ RT_UNLOCK(rt);
+ (void) rtrequest(RTM_DELETE, rt_key(rt),
rt->rt_gateway, rt_mask(rt), rt->rt_flags,
(struct rtentry **)0);
+ } else {
+ RT_UNLOCK(rt);
+ }
/* if the address is gone keep the old route in the pcb */
- if ((ifa_foraddr(inp->inp_laddr.s_addr)) != 0) {
- inp->inp_route.ro_rt = 0;
- rtfree_locked(rt);
+ if ((ia = ifa_foraddr(inp->inp_laddr.s_addr)) != NULL) {
+ inp->inp_route.ro_rt = NULL;
+ rtfree(rt);
+ IFA_REMREF(&ia->ia_ifa);
}
- lck_mtx_unlock(rt_mtx);
/*
* A new route can be allocated
* the next time output is attempted.
struct rtentry *rt;
if ((rt = inp->inp_route.ro_rt) != NULL) {
- if ((ifa_foraddr(inp->inp_laddr.s_addr)) == 0)
+ struct in_ifaddr *ia;
+
+ if ((ia = ifa_foraddr(inp->inp_laddr.s_addr)) == NULL) {
return; /* we can't remove the route now. not sure if still ok to use src */
- lck_mtx_lock(rt_mtx);
- /* Check again, this time while holding the lock */
- if ((rt = inp->inp_route.ro_rt) == NULL) {
- lck_mtx_unlock(rt_mtx);
- return;
}
- rtfree_locked(rt);
+ IFA_REMREF(&ia->ia_ifa);
+ rtfree(rt);
inp->inp_route.ro_rt = NULL;
- lck_mtx_unlock(rt_mtx);
/*
* A new route can be allocated the next time
* output is attempted.
}
}
+/*
+ * Check if PCB exists in hash list.
+ */
+int
+in_pcblookup_hash_exists(
+ struct inpcbinfo *pcbinfo,
+ struct in_addr faddr,
+ u_int fport_arg,
+ struct in_addr laddr,
+ u_int lport_arg,
+ int wildcard,
+ uid_t *uid,
+ gid_t *gid,
+ __unused struct ifnet *ifp)
+{
+ struct inpcbhead *head;
+ struct inpcb *inp;
+ u_short fport = fport_arg, lport = lport_arg;
+ int found;
+
+ *uid = UID_MAX;
+ *gid = GID_MAX;
+
+ /*
+ * We may have found the pcb in the last lookup - check this first.
+ */
+
+ lck_rw_lock_shared(pcbinfo->mtx);
+
+ /*
+ * First look for an exact match.
+ */
+ head = &pcbinfo->hashbase[INP_PCBHASH(faddr.s_addr, lport, fport,
+ pcbinfo->hashmask)];
+ LIST_FOREACH(inp, head, inp_hash) {
+#if INET6
+ if ((inp->inp_vflag & INP_IPV4) == 0)
+ continue;
+#endif
+ if (inp->inp_faddr.s_addr == faddr.s_addr &&
+ inp->inp_laddr.s_addr == laddr.s_addr &&
+ inp->inp_fport == fport &&
+ inp->inp_lport == lport) {
+ if ((found = (inp->inp_socket != NULL))) {
+ /*
+ * Found.
+ */
+ *uid = inp->inp_socket->so_uid;
+ *gid = inp->inp_socket->so_gid;
+ }
+ lck_rw_done(pcbinfo->mtx);
+ return (found);
+ }
+ }
+ if (wildcard) {
+ struct inpcb *local_wild = NULL;
+#if INET6
+ struct inpcb *local_wild_mapped = NULL;
+#endif
+
+ head = &pcbinfo->hashbase[INP_PCBHASH(INADDR_ANY, lport, 0,
+ pcbinfo->hashmask)];
+ LIST_FOREACH(inp, head, inp_hash) {
+#if INET6
+ if ((inp->inp_vflag & INP_IPV4) == 0)
+ continue;
+#endif
+ if (inp->inp_faddr.s_addr == INADDR_ANY &&
+ inp->inp_lport == lport) {
+#if defined(NFAITH) && NFAITH > 0
+ if (ifp && ifp->if_type == IFT_FAITH &&
+ (inp->inp_flags & INP_FAITH) == 0)
+ continue;
+#endif
+ if (inp->inp_laddr.s_addr == laddr.s_addr) {
+ if ((found = (inp->inp_socket != NULL))) {
+ *uid = inp->inp_socket->so_uid;
+ *gid = inp->inp_socket->so_gid;
+ }
+ lck_rw_done(pcbinfo->mtx);
+ return (found);
+ }
+ else if (inp->inp_laddr.s_addr == INADDR_ANY) {
+#if INET6
+ if (inp->inp_socket &&
+ INP_CHECK_SOCKAF(inp->inp_socket,
+ AF_INET6))
+ local_wild_mapped = inp;
+ else
+#endif /* INET6 */
+ local_wild = inp;
+ }
+ }
+ }
+ if (local_wild == NULL) {
+#if INET6
+ if (local_wild_mapped != NULL) {
+ if ((found = (local_wild_mapped->inp_socket != NULL))) {
+ *uid = local_wild_mapped->inp_socket->so_uid;
+ *gid = local_wild_mapped->inp_socket->so_gid;
+ }
+ lck_rw_done(pcbinfo->mtx);
+ return (found);
+ }
+#endif /* INET6 */
+ lck_rw_done(pcbinfo->mtx);
+ return (0);
+ }
+ if (local_wild != NULL) {
+ if ((found = (local_wild->inp_socket != NULL))) {
+ *uid = local_wild->inp_socket->so_uid;
+ *gid = local_wild->inp_socket->so_gid;
+ }
+ lck_rw_done(pcbinfo->mtx);
+ return (found);
+ }
+ }
+
+ /*
+ * Not found.
+ */
+ lck_rw_done(pcbinfo->mtx);
+ return (0);
+}
+
/*
* Lookup PCB in hash list.
*/
struct inpcbport *phd;
u_int32_t hashkey_faddr;
+ if (!locked) {
+ if (!lck_rw_try_lock_exclusive(pcbinfo->mtx)) {
+ /*lock inversion issue, mostly with udp multicast packets */
+ socket_unlock(inp->inp_socket, 0);
+ lck_rw_lock_exclusive(pcbinfo->mtx);
+ socket_lock(inp->inp_socket, 0);
+ if (inp->inp_state == INPCB_STATE_DEAD) {
+ /* The socket got dropped when it was unlocked */
+ lck_rw_done(pcbinfo->mtx);
+ return(ECONNABORTED);
+ }
+ }
+ }
+
#if INET6
if (inp->inp_vflag & INP_IPV6)
hashkey_faddr = inp->in6p_faddr.s6_addr32[3] /* XXX */;
inp->hash_element = INP_PCBHASH(hashkey_faddr, inp->inp_lport, inp->inp_fport, pcbinfo->hashmask);
- if (!locked) {
- if (!lck_rw_try_lock_exclusive(pcbinfo->mtx)) {
- /*lock inversion issue, mostly with udp multicast packets */
- socket_unlock(inp->inp_socket, 0);
- lck_rw_lock_exclusive(pcbinfo->mtx);
- socket_lock(inp->inp_socket, 0);
- }
- }
-
pcbhash = &pcbinfo->hashbase[inp->hash_element];
pcbporthash = &pcbinfo->porthashbase[INP_PCBPORTHASH(inp->inp_lport,
inp->inp_pcbinfo->ipi_count--;
}
-static void in_pcb_detach_port( struct inpcb *inp);
-int
-in_pcb_grab_port (struct inpcbinfo *pcbinfo,
- u_short options,
- struct in_addr laddr,
- u_short *lport,
- struct in_addr faddr,
- u_short fport,
- u_int cookie,
- u_char owner_id)
-{
- struct inpcb *inp, *pcb;
- struct sockaddr_in sin;
- struct proc *p = current_proc();
- int stat;
-
-
- pcbinfo->nat_dummy_socket.so_pcb = 0;
- pcbinfo->nat_dummy_socket.so_options = 0;
- if (*lport) {
- /* The grabber wants a particular port */
-
- if (faddr.s_addr || fport) {
- /*
- * This is either the second half of an active connect, or
- * it's from the acceptance of an incoming connection.
- */
- if (laddr.s_addr == 0) {
- pcbinfo->nat_dummy_socket.so_pcb = (caddr_t)pcbinfo->nat_dummy_pcb;
- return EINVAL;
- }
-
- inp = in_pcblookup_hash(pcbinfo, faddr, fport, laddr, *lport, 0, NULL);
- if (inp) {
- /* pcb was found, its count was upped. need to decrease it here */
- in_pcb_checkstate(inp, WNT_RELEASE, 0);
- if (!(IN_MULTICAST(ntohl(laddr.s_addr)))) {
- pcbinfo->nat_dummy_socket.so_pcb = (caddr_t)pcbinfo->nat_dummy_pcb;
- return (EADDRINUSE);
- }
- }
-
- stat = in_pcballoc(&pcbinfo->nat_dummy_socket, pcbinfo, p);
- if (stat) {
- pcbinfo->nat_dummy_socket.so_pcb = (caddr_t)pcbinfo->nat_dummy_pcb;
- return stat;
- }
- pcb = sotoinpcb(&pcbinfo->nat_dummy_socket);
- pcb->inp_vflag |= INP_IPV4;
-
- pcb->inp_lport = *lport;
- pcb->inp_laddr.s_addr = laddr.s_addr;
-
- pcb->inp_faddr = faddr;
- pcb->inp_fport = fport;
-
- lck_rw_lock_exclusive(pcbinfo->mtx);
- in_pcbinshash(pcb, 1);
- lck_rw_done(pcbinfo->mtx);
- }
- else {
- /*
- * This is either a bind for a passive socket, or it's the
- * first part of bind-connect sequence (not likely since an
- * ephemeral port is usually used in this case). Or, it's
- * the result of a connection acceptance when the foreign
- * address/port cannot be provided (which requires the SO_REUSEADDR
- * flag if laddr is not multicast).
- */
-
- stat = in_pcballoc(&pcbinfo->nat_dummy_socket, pcbinfo, p);
- if (stat) {
- pcbinfo->nat_dummy_socket.so_pcb = (caddr_t)pcbinfo->nat_dummy_pcb;
- return stat;
- }
- pcb = sotoinpcb(&pcbinfo->nat_dummy_socket);
- pcb->inp_vflag |= INP_IPV4;
-
- pcbinfo->nat_dummy_socket.so_options = options;
- bzero(&sin, sizeof(struct sockaddr_in));
- sin.sin_len = sizeof(struct sockaddr_in);
- sin.sin_family = AF_INET;
- sin.sin_addr.s_addr = laddr.s_addr;
- sin.sin_port = *lport;
-
- socket_lock(&pcbinfo->nat_dummy_socket, 1);
- stat = in_pcbbind((struct inpcb *) pcbinfo->nat_dummy_socket.so_pcb,
- (struct sockaddr *) &sin, p);
- if (stat) {
- socket_unlock(&pcbinfo->nat_dummy_socket, 1); /*detach first */
- in_pcb_detach_port(pcb); /* will restore dummy pcb */
- return stat;
- }
- socket_unlock(&pcbinfo->nat_dummy_socket, 1);
- }
- }
- else {
- /* The grabber wants an ephemeral port */
-
- stat = in_pcballoc(&pcbinfo->nat_dummy_socket, pcbinfo, p);
- if (stat) {
- pcbinfo->nat_dummy_socket.so_pcb = (caddr_t)pcbinfo->nat_dummy_pcb;
- return stat;
- }
- pcb = sotoinpcb(&pcbinfo->nat_dummy_socket);
- pcb->inp_vflag |= INP_IPV4;
-
- bzero(&sin, sizeof(struct sockaddr_in));
- sin.sin_len = sizeof(struct sockaddr_in);
- sin.sin_family = AF_INET;
- sin.sin_addr.s_addr = laddr.s_addr;
- sin.sin_port = 0;
-
- if (faddr.s_addr || fport) {
- /*
- * Not sure if this case will be used - could occur when connect
- * is called, skipping the bind.
- */
-
- if (laddr.s_addr == 0) {
- in_pcb_detach_port(pcb); /* restores dummy pcb */
- return EINVAL;
- }
-
- socket_lock(&pcbinfo->nat_dummy_socket, 1);
- stat = in_pcbbind((struct inpcb *) pcbinfo->nat_dummy_socket.so_pcb,
- (struct sockaddr *) &sin, p);
- if (stat) {
- socket_unlock(&pcbinfo->nat_dummy_socket, 1);
- in_pcb_detach_port(pcb); /* restores dummy pcb */
- return stat;
- }
-
- socket_unlock(&pcbinfo->nat_dummy_socket, 1);
- inp = in_pcblookup_hash(pcbinfo, faddr, fport,
- pcb->inp_laddr, pcb->inp_lport, 0, NULL);
- if (inp) {
- /* pcb was found, its count was upped. need to decrease it here */
- in_pcb_checkstate(inp, WNT_RELEASE, 0);
- in_pcb_detach_port(pcb);
- return (EADDRINUSE);
- }
-
- lck_rw_lock_exclusive(pcbinfo->mtx);
- pcb->inp_faddr = faddr;
- pcb->inp_fport = fport;
- in_pcbrehash(pcb);
- lck_rw_done(pcbinfo->mtx);
- }
- else {
- /*
- * This is a simple bind of an ephemeral port. The local addr
- * may or may not be defined.
- */
-
- socket_lock(&pcbinfo->nat_dummy_socket, 1);
- stat = in_pcbbind((struct inpcb *) pcbinfo->nat_dummy_socket.so_pcb,
- (struct sockaddr *) &sin, p);
- if (stat) {
- socket_unlock(&pcbinfo->nat_dummy_socket, 1);
- in_pcb_detach_port(pcb);
- return stat;
- }
- socket_unlock(&pcbinfo->nat_dummy_socket, 1);
- }
- *lport = pcb->inp_lport;
- }
-
-
- pcb->nat_owner = owner_id;
- pcb->nat_cookie = cookie;
- pcb->inp_ppcb = (caddr_t) pcbinfo->dummy_cb;
- pcbinfo->nat_dummy_socket.so_pcb = (caddr_t)pcbinfo->nat_dummy_pcb; /* restores dummypcb */
- return 0;
-}
-
-/* 3962035 - in_pcb_letgo_port needs a special case function for detaching */
-static void
-in_pcb_detach_port(
- struct inpcb *inp)
-{
- struct socket *so = inp->inp_socket;
- struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
-
- if (so != &pcbinfo->nat_dummy_socket)
- panic("in_pcb_detach_port: not a dummy_sock: so=%p, inp=%p\n", so, inp);
- inp->inp_gencnt = ++pcbinfo->ipi_gencnt;
- /*### access ipi in in_pcbremlists */
- in_pcbremlists(inp);
-
- inp->inp_socket = 0;
- zfree(pcbinfo->ipi_zone, inp);
- pcbinfo->nat_dummy_socket.so_pcb = (caddr_t)pcbinfo->nat_dummy_pcb; /* restores dummypcb */
-}
-
-int
-in_pcb_letgo_port(struct inpcbinfo *pcbinfo, struct in_addr laddr, u_short lport,
- struct in_addr faddr, u_short fport, u_char owner_id)
-{
- struct inpcbhead *head;
- struct inpcb *inp;
-
- /*
- * First look for an exact match.
- */
-
- lck_rw_lock_exclusive(pcbinfo->mtx);
- head = &pcbinfo->hashbase[INP_PCBHASH(faddr.s_addr, lport, fport, pcbinfo->hashmask)];
- for (inp = head->lh_first; inp != NULL; inp = inp->inp_hash.le_next) {
- if (inp->inp_faddr.s_addr == faddr.s_addr &&
- inp->inp_laddr.s_addr == laddr.s_addr &&
- inp->inp_fport == fport &&
- inp->inp_lport == lport &&
- inp->nat_owner == owner_id) {
- /*
- * Found.
- */
- in_pcb_detach_port(inp);
- lck_rw_done(pcbinfo->mtx);
- return 0;
- }
- }
-
- lck_rw_done(pcbinfo->mtx);
- return ENOENT;
-}
-
-u_char
-in_pcb_get_owner(struct inpcbinfo *pcbinfo,
- struct in_addr laddr, u_short lport,
- struct in_addr faddr, u_short fport,
- u_int *cookie)
-
-{
- struct inpcb *inp;
- u_char owner_id = INPCB_NO_OWNER;
- struct inpcbport *phd;
- struct inpcbporthead *porthash;
-
-
- if (IN_MULTICAST(laddr.s_addr)) {
- /*
- * Walk through PCB's looking for registered
- * owners.
- */
-
- lck_rw_lock_shared(pcbinfo->mtx);
- porthash = &pcbinfo->porthashbase[INP_PCBPORTHASH(lport,
- pcbinfo->porthashmask)];
- for (phd = porthash->lh_first; phd != NULL; phd = phd->phd_hash.le_next) {
- if (phd->phd_port == lport)
- break;
- }
-
- if (phd == 0) {
- lck_rw_done(pcbinfo->mtx);
- return INPCB_NO_OWNER;
- }
-
- owner_id = INPCB_NO_OWNER;
- for (inp = phd->phd_pcblist.lh_first; inp != NULL;
- inp = inp->inp_portlist.le_next) {
-
- if (inp->inp_laddr.s_addr == laddr.s_addr) {
- if (inp->nat_owner == 0)
- owner_id |= INPCB_OWNED_BY_X;
- else
- owner_id |= inp->nat_owner;
- }
- }
-
- lck_rw_done(pcbinfo->mtx);
- return owner_id;
- }
- else {
- inp = in_pcblookup_hash(pcbinfo, faddr, fport,
- laddr, lport, 1, NULL);
- if (inp) {
- /* pcb was found, its count was upped. need to decrease it here */
- /* if we found it, that pcb is already locked by the caller */
- if (in_pcb_checkstate(inp, WNT_RELEASE, 1) == WNT_STOPUSING)
- return(INPCB_NO_OWNER);
-
- if (inp->nat_owner) {
- owner_id = inp->nat_owner;
- *cookie = inp->nat_cookie;
- }
- else {
- owner_id = INPCB_OWNED_BY_X;
- }
- }
- else
- owner_id = INPCB_NO_OWNER;
-
- return owner_id;
- }
-}
-
-int
-in_pcb_new_share_client(struct inpcbinfo *pcbinfo, u_char *owner_id)
-{
-
- int i;
-
-
- for (i=0; i < INPCB_MAX_IDS; i++) {
- if ((pcbinfo->all_owners & (1 << i)) == 0) {
- pcbinfo->all_owners |= (1 << i);
- *owner_id = (1 << i);
- return 0;
- }
- }
-
- return ENOSPC;
-}
-
-int
-in_pcb_rem_share_client(struct inpcbinfo *pcbinfo, u_char owner_id)
-{
- struct inpcb *inp;
-
-
- lck_rw_lock_exclusive(pcbinfo->mtx);
- if (pcbinfo->all_owners & owner_id) {
- pcbinfo->all_owners &= ~owner_id;
- for (inp = pcbinfo->listhead->lh_first; inp != NULL; inp = inp->inp_list.le_next) {
- if (inp->nat_owner & owner_id) {
- if (inp->nat_owner == owner_id)
- /*
- * Deallocate the pcb
- */
- in_pcb_detach_port(inp);
- else
- inp->nat_owner &= ~owner_id;
- }
- }
- }
- else {
- lck_rw_done(pcbinfo->mtx);
- return ENOENT;
- }
-
- lck_rw_done(pcbinfo->mtx);
- return 0;
-}
-
-
-
-void in_pcb_nat_init(struct inpcbinfo *pcbinfo, int afamily,
- int pfamily, int protocol)
-{
- int stat;
- struct proc *p = current_proc();
-
- bzero(&pcbinfo->nat_dummy_socket, sizeof(struct socket));
-#if CONFIG_MACF_NET
- mac_socket_label_init(&pcbinfo->nat_dummy_socket, M_WAITOK);
-#endif
- pcbinfo->nat_dummy_socket.so_proto = pffindproto_locked(afamily, pfamily, protocol);
- pcbinfo->all_owners = 0;
- stat = in_pcballoc(&pcbinfo->nat_dummy_socket, pcbinfo, p);
- if (stat)
- panic("in_pcb_nat_init: can't alloc fakepcb err=%d\n", stat);
- pcbinfo->nat_dummy_pcb = (struct inpcb *)pcbinfo->nat_dummy_socket.so_pcb;
-}
-
/* Mechanism used to defer the memory release of PCBs
* The pcb list will contain the pcb until the ripper can clean it up if
* the following conditions are met: 1) state "DEAD", 2) wantcnt is STOPUSING
if (locked == 0)
socket_lock(pcb->inp_socket, 1);
pcb->inp_state = INPCB_STATE_DEAD;
+
stopusing:
if (pcb->inp_socket->so_usecount < 0)
panic("in_pcb_checkstate STOP pcb=%p so=%p usecount is negative\n", pcb, pcb->inp_socket);
/*
* inpcb_to_compat copies specific bits of an inpcb to a inpcb_compat.
* The inpcb_compat data structure is passed to user space and must
- * not change. We intentionally avoid copying pointers. The socket is
- * the one exception, though we probably shouldn't copy that either.
+ * not change. We intentionally avoid copying pointers.
*/
void
inpcb_to_compat(
bzero(inp_compat, sizeof(*inp_compat));
inp_compat->inp_fport = inp->inp_fport;
inp_compat->inp_lport = inp->inp_lport;
- inp_compat->inp_socket = inp->inp_socket;
inp_compat->nat_owner = inp->nat_owner;
inp_compat->nat_cookie = inp->nat_cookie;
inp_compat->inp_gencnt = inp->inp_gencnt;
inp_compat->inp_depend4.inp4_ip_tos = inp->inp_depend4.inp4_ip_tos;
inp_compat->inp_depend6.inp6_hlim = inp->inp_depend6.inp6_hlim;
inp_compat->inp_depend6.inp6_cksum = inp->inp_depend6.inp6_cksum;
- inp_compat->inp6_ifindex = inp->inp6_ifindex;
+ inp_compat->inp_depend6.inp6_ifindex = inp->inp_depend6.inp6_ifindex;
inp_compat->inp_depend6.inp6_hops = inp->inp_depend6.inp6_hops;
}
+#if !CONFIG_EMBEDDED
+
+void
+inpcb_to_xinpcb64(
+ struct inpcb *inp,
+ struct xinpcb64 *xinp)
+{
+ xinp->inp_fport = inp->inp_fport;
+ xinp->inp_lport = inp->inp_lport;
+ xinp->inp_gencnt = inp->inp_gencnt;
+ xinp->inp_flags = inp->inp_flags;
+ xinp->inp_flow = inp->inp_flow;
+ xinp->inp_vflag = inp->inp_vflag;
+ xinp->inp_ip_ttl = inp->inp_ip_ttl;
+ xinp->inp_ip_p = inp->inp_ip_p;
+ xinp->inp_dependfaddr.inp6_foreign = inp->inp_dependfaddr.inp6_foreign;
+ xinp->inp_dependladdr.inp6_local = inp->inp_dependladdr.inp6_local;
+ xinp->inp_depend4.inp4_ip_tos = inp->inp_depend4.inp4_ip_tos;
+ xinp->inp_depend6.inp6_hlim = inp->inp_depend6.inp6_hlim;
+ xinp->inp_depend6.inp6_cksum = inp->inp_depend6.inp6_cksum;
+ xinp->inp_depend6.inp6_ifindex = inp->inp_depend6.inp6_ifindex;
+ xinp->inp_depend6.inp6_hops = inp->inp_depend6.inp6_hops;
+}
+
+#endif /* !CONFIG_EMBEDDED */
+
+
+/*
+ * The following routines implement this scheme:
+ *
+ * Callers of ip_output() that intend to cache the route in the inpcb pass
+ * a local copy of the struct route to ip_output(). Using a local copy of
+ * the cached route significantly simplifies things as IP no longer has to
+ * worry about having exclusive access to the passed in struct route, since
+ * it's defined in the caller's stack; in essence, this allows for a lock-
+ * less operation when updating the struct route at the IP level and below,
+ * whenever necessary. The scheme works as follows:
+ *
+ * Prior to dropping the socket's lock and calling ip_output(), the caller
+ * copies the struct route from the inpcb into its stack, and adds a reference
+ * to the cached route entry, if there was any. The socket's lock is then
+ * dropped and ip_output() is called with a pointer to the copy of struct
+ * route defined on the stack (not to the one in the inpcb.)
+ *
+ * Upon returning from ip_output(), the caller then acquires the socket's
+ * lock and synchronizes the cache; if there is no route cached in the inpcb,
+ * it copies the local copy of struct route (which may or may not contain any
+ * route) back into the cache; otherwise, if the inpcb has a route cached in
+ * it, the one in the local copy will be freed, if there's any. Trashing the
+ * cached route in the inpcb can be avoided because ip_output() is single-
+ * threaded per-PCB (i.e. multiple transmits on a PCB are always serialized
+ * by the socket/transport layer.)
+ */
+void
+inp_route_copyout(struct inpcb *inp, struct route *dst)
+{
+ struct route *src = &inp->inp_route;
+
+ lck_mtx_assert(&inp->inpcb_mtx, LCK_MTX_ASSERT_OWNED);
+
+ /*
+ * If the route in the PCB is not for IPv4, blow it away;
+ * this is possible in the case of IPv4-mapped address case.
+ */
+ if (src->ro_rt != NULL && rt_key(src->ro_rt)->sa_family != AF_INET) {
+ rtfree(src->ro_rt);
+ src->ro_rt = NULL;
+ }
+
+ route_copyout(dst, src, sizeof(*dst));
+}
+
+void
+inp_route_copyin(struct inpcb *inp, struct route *src)
+{
+ struct route *dst = &inp->inp_route;
+
+ lck_mtx_assert(&inp->inpcb_mtx, LCK_MTX_ASSERT_OWNED);
+
+ /* Minor sanity check */
+ if (src->ro_rt != NULL && rt_key(src->ro_rt)->sa_family != AF_INET)
+ panic("%s: wrong or corrupted route: %p", __func__, src);
+
+ route_copyin(src, dst, sizeof(*src));
+}
+
+/*
+ * Handler for setting IP_FORCE_OUT_IFP/IP_BOUND_IF/IPV6_BOUND_IF socket option.
+ */
+void
+inp_bindif(struct inpcb *inp, unsigned int ifscope)
+{
+ /*
+ * A zero interface scope value indicates an "unbind".
+ * Otherwise, take in whatever value the app desires;
+ * the app may already know the scope (or force itself
+ * to such a scope) ahead of time before the interface
+ * gets attached. It doesn't matter either way; any
+ * route lookup from this point on will require an
+ * exact match for the embedded interface scope.
+ */
+ inp->inp_boundif = ifscope;
+ if (inp->inp_boundif == IFSCOPE_NONE)
+ inp->inp_flags &= ~INP_BOUND_IF;
+ else
+ inp->inp_flags |= INP_BOUND_IF;
+
+ /* Blow away any cached route in the PCB */
+ if (inp->inp_route.ro_rt != NULL) {
+ rtfree(inp->inp_route.ro_rt);
+ inp->inp_route.ro_rt = NULL;
+ }
+}
+
+/*
+ * Handler for setting IP_NO_IFT_CELLULAR/IPV6_NO_IFT_CELLULAR socket option.
+ */
+int
+inp_nocellular(struct inpcb *inp, unsigned int val)
+{
+ if (val) {
+ inp->inp_flags |= INP_NO_IFT_CELLULAR;
+ } else if (inp->inp_flags & INP_NO_IFT_CELLULAR) {
+ /* once set, it cannot be unset */
+ return (EINVAL);
+ }
+
+ /* Blow away any cached route in the PCB */
+ if (inp->inp_route.ro_rt != NULL) {
+ rtfree(inp->inp_route.ro_rt);
+ inp->inp_route.ro_rt = NULL;
+ }
+
+ return (0);
+}
projects / apple / xnu.git / blobdiff