#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/proc.h>
#include <sys/kernel.h>
#include <sys/sysctl.h>
#include <sys/mcache.h>
#include <sys/kauth.h>
#include <sys/priv.h>
#include <sys/proc_uuid_policy.h>
#include <sys/syslog.h>
#include <sys/priv.h>
#include <libkern/OSAtomic.h>
#include <kern/locks.h>
#include <machine/limits.h>
#include <kern/zalloc.h>
#include <net/if.h>
#include <net/if_types.h>
#include <net/route.h>
#include <net/flowhash.h>
#include <net/flowadv.h>
#include <net/ntstat.h>
#include <netinet/in.h>
#include <netinet/in_pcb.h>
#include <netinet/in_var.h>
#include <netinet/ip_var.h>
#if INET6
#include <netinet/ip6.h>
#include <netinet6/ip6_var.h>
#endif
#include <sys/kdebug.h>
#include <sys/random.h>
#include <dev/random/randomdev.h>
#include <mach/boolean.h>
#if NECP
#include <net/necp.h>
#endif
static lck_grp_t *inpcb_lock_grp;
static lck_attr_t *inpcb_lock_attr;
static lck_grp_attr_t *inpcb_lock_grp_attr;
decl_lck_mtx_data(static, inpcb_lock);
decl_lck_mtx_data(static, inpcb_timeout_lock);
static TAILQ_HEAD(, inpcbinfo) inpcb_head = TAILQ_HEAD_INITIALIZER(inpcb_head);
static u_int16_t inpcb_timeout_run = 0;
static boolean_t inpcb_garbage_collecting = FALSE;
static boolean_t inpcb_ticking = FALSE;
static boolean_t inpcb_fast_timer_on = FALSE;
static boolean_t inpcb_toomany_gcreq = FALSE;
#define INPCB_GCREQ_THRESHOLD 50000
#define INPCB_TOOMANY_GCREQ_TIMER (hz/10)
static void inpcb_sched_timeout(struct timeval *);
static void inpcb_timeout(void *);
int inpcb_timeout_lazy = 10;
extern int tvtohz(struct timeval *);
#if CONFIG_PROC_UUID_POLICY
static void inp_update_cellular_policy(struct inpcb *, boolean_t);
#if NECP
static void inp_update_necp_want_app_policy(struct inpcb *, boolean_t);
#endif
#endif
#define DBG_FNC_PCB_LOOKUP NETDBG_CODE(DBG_NETTCP, (6 << 8))
#define DBG_FNC_PCB_HLOOKUP NETDBG_CODE(DBG_NETTCP, ((6 << 8) | 1))
int ipport_lowfirstauto = IPPORT_RESERVED - 1;
int ipport_lowlastauto = IPPORT_RESERVEDSTART;
int ipport_firstauto = IPPORT_HIFIRSTAUTO;
int ipport_lastauto = IPPORT_HILASTAUTO;
int ipport_hifirstauto = IPPORT_HIFIRSTAUTO;
int ipport_hilastauto = IPPORT_HILASTAUTO;
#define RANGECHK(var, min, max) \
if ((var) < (min)) { (var) = (min); } \
else if ((var) > (max)) { (var) = (max); }
static int
sysctl_net_ipport_check SYSCTL_HANDLER_ARGS
{
#pragma unused(arg1, arg2)
int error;
error = sysctl_handle_int(oidp, oidp->oid_arg1, oidp->oid_arg2, req);
if (!error) {
RANGECHK(ipport_lowfirstauto, 1, IPPORT_RESERVED - 1);
RANGECHK(ipport_lowlastauto, 1, IPPORT_RESERVED - 1);
RANGECHK(ipport_firstauto, IPPORT_RESERVED, USHRT_MAX);
RANGECHK(ipport_lastauto, IPPORT_RESERVED, USHRT_MAX);
RANGECHK(ipport_hifirstauto, IPPORT_RESERVED, USHRT_MAX);
RANGECHK(ipport_hilastauto, IPPORT_RESERVED, USHRT_MAX);
}
return (error);
}
#undef RANGECHK
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 | CTLFLAG_LOCKED,
&ipport_lowfirstauto, 0, &sysctl_net_ipport_check, "I", "");
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 | CTLFLAG_LOCKED,
&ipport_firstauto, 0, &sysctl_net_ipport_check, "I", "");
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 | CTLFLAG_LOCKED,
&ipport_hifirstauto, 0, &sysctl_net_ipport_check, "I", "");
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;
struct inp_flowhash_key_addr {
union {
struct in_addr v4;
struct in6_addr v6;
u_int8_t addr8[16];
u_int16_t addr16[8];
u_int32_t addr32[4];
} infha;
};
struct inp_flowhash_key {
struct inp_flowhash_key_addr infh_laddr;
struct inp_flowhash_key_addr infh_faddr;
u_int32_t infh_lport;
u_int32_t infh_fport;
u_int32_t infh_af;
u_int32_t infh_proto;
u_int32_t infh_rand1;
u_int32_t infh_rand2;
};
static u_int32_t inp_hash_seed = 0;
static int infc_cmp(const struct inpcb *, const struct inpcb *);
#define INPFC_SOLOCKED 0x1
#define INPFC_REMOVE 0x2
static struct inpcb *inp_fc_getinp(u_int32_t, u_int32_t);
static void inp_fc_feedback(struct inpcb *);
extern void tcp_remove_from_time_wait(struct inpcb *inp);
decl_lck_mtx_data(static, inp_fc_lck);
RB_HEAD(inp_fc_tree, inpcb) inp_fc_tree;
RB_PROTOTYPE(inp_fc_tree, inpcb, infc_link, infc_cmp);
RB_GENERATE(inp_fc_tree, inpcb, infc_link, infc_cmp);
struct inpcb key_inp;
void
in_pcbinit(void)
{
static int inpcb_initialized = 0;
VERIFY(!inpcb_initialized);
inpcb_initialized = 1;
inpcb_lock_grp_attr = lck_grp_attr_alloc_init();
inpcb_lock_grp = lck_grp_alloc_init("inpcb", inpcb_lock_grp_attr);
inpcb_lock_attr = lck_attr_alloc_init();
lck_mtx_init(&inpcb_lock, inpcb_lock_grp, inpcb_lock_attr);
lck_mtx_init(&inpcb_timeout_lock, inpcb_lock_grp, inpcb_lock_attr);
lck_mtx_init(&inp_fc_lck, inpcb_lock_grp, inpcb_lock_attr);
lck_mtx_lock(&inp_fc_lck);
RB_INIT(&inp_fc_tree);
bzero(&key_inp, sizeof(key_inp));
lck_mtx_unlock(&inp_fc_lck);
}
#define INPCB_HAVE_TIMER_REQ(req) (((req).intimer_lazy > 0) || \
((req).intimer_fast > 0) || ((req).intimer_nodelay > 0))
static void
inpcb_timeout(void *arg)
{
#pragma unused(arg)
struct inpcbinfo *ipi;
boolean_t t, gc;
struct intimercount gccnt, tmcnt;
struct timeval leeway;
boolean_t toomany_gc = FALSE;
if (arg != NULL) {
VERIFY(arg == &inpcb_toomany_gcreq);
toomany_gc = *(boolean_t *)arg;
}
net_update_uptime();
bzero(&gccnt, sizeof(gccnt));
bzero(&tmcnt, sizeof(tmcnt));
lck_mtx_lock_spin(&inpcb_timeout_lock);
gc = inpcb_garbage_collecting;
inpcb_garbage_collecting = FALSE;
t = inpcb_ticking;
inpcb_ticking = FALSE;
if (gc || t) {
lck_mtx_unlock(&inpcb_timeout_lock);
lck_mtx_lock(&inpcb_lock);
TAILQ_FOREACH(ipi, &inpcb_head, ipi_entry) {
if (INPCB_HAVE_TIMER_REQ(ipi->ipi_gc_req)) {
bzero(&ipi->ipi_gc_req,
sizeof(ipi->ipi_gc_req));
if (gc && ipi->ipi_gc != NULL) {
ipi->ipi_gc(ipi);
gccnt.intimer_lazy +=
ipi->ipi_gc_req.intimer_lazy;
gccnt.intimer_fast +=
ipi->ipi_gc_req.intimer_fast;
gccnt.intimer_nodelay +=
ipi->ipi_gc_req.intimer_nodelay;
}
}
if (INPCB_HAVE_TIMER_REQ(ipi->ipi_timer_req)) {
bzero(&ipi->ipi_timer_req,
sizeof(ipi->ipi_timer_req));
if (t && ipi->ipi_timer != NULL) {
ipi->ipi_timer(ipi);
tmcnt.intimer_lazy +=
ipi->ipi_timer_req.intimer_lazy;
tmcnt.intimer_lazy +=
ipi->ipi_timer_req.intimer_fast;
tmcnt.intimer_nodelay +=
ipi->ipi_timer_req.intimer_nodelay;
}
}
}
lck_mtx_unlock(&inpcb_lock);
lck_mtx_lock_spin(&inpcb_timeout_lock);
}
if (!inpcb_garbage_collecting)
inpcb_garbage_collecting = INPCB_HAVE_TIMER_REQ(gccnt);
if (!inpcb_ticking)
inpcb_ticking = INPCB_HAVE_TIMER_REQ(tmcnt);
if (toomany_gc) {
inpcb_toomany_gcreq = FALSE;
} else {
inpcb_timeout_run--;
VERIFY(inpcb_timeout_run >= 0 && inpcb_timeout_run < 2);
}
bzero(&leeway, sizeof(leeway));
leeway.tv_sec = inpcb_timeout_lazy;
if (gccnt.intimer_nodelay > 0 || tmcnt.intimer_nodelay > 0)
inpcb_sched_timeout(NULL);
else if ((gccnt.intimer_fast + tmcnt.intimer_fast) <= 5)
inpcb_sched_timeout(&leeway);
else
inpcb_sched_timeout(NULL);
lck_mtx_unlock(&inpcb_timeout_lock);
}
static void
inpcb_sched_timeout(struct timeval *leeway)
{
lck_mtx_assert(&inpcb_timeout_lock, LCK_MTX_ASSERT_OWNED);
if (inpcb_timeout_run == 0 &&
(inpcb_garbage_collecting || inpcb_ticking)) {
lck_mtx_convert_spin(&inpcb_timeout_lock);
inpcb_timeout_run++;
if (leeway == NULL) {
inpcb_fast_timer_on = TRUE;
timeout(inpcb_timeout, NULL, hz);
} else {
inpcb_fast_timer_on = FALSE;
timeout_with_leeway(inpcb_timeout, NULL, hz,
tvtohz(leeway));
}
} else if (inpcb_timeout_run == 1 &&
leeway == NULL && !inpcb_fast_timer_on) {
lck_mtx_convert_spin(&inpcb_timeout_lock);
inpcb_timeout_run++;
inpcb_fast_timer_on = TRUE;
timeout(inpcb_timeout, NULL, hz);
}
}
void
inpcb_gc_sched(struct inpcbinfo *ipi, u_int32_t type)
{
struct timeval leeway;
u_int32_t gccnt;
lck_mtx_lock_spin(&inpcb_timeout_lock);
inpcb_garbage_collecting = TRUE;
gccnt = ipi->ipi_gc_req.intimer_nodelay +
ipi->ipi_gc_req.intimer_fast;
if (gccnt > INPCB_GCREQ_THRESHOLD && !inpcb_toomany_gcreq) {
inpcb_toomany_gcreq = TRUE;
lck_mtx_convert_spin(&inpcb_timeout_lock);
timeout(inpcb_timeout, (void *)&inpcb_toomany_gcreq,
INPCB_TOOMANY_GCREQ_TIMER);
}
switch (type) {
case INPCB_TIMER_NODELAY:
atomic_add_32(&ipi->ipi_gc_req.intimer_nodelay, 1);
inpcb_sched_timeout(NULL);
break;
case INPCB_TIMER_FAST:
atomic_add_32(&ipi->ipi_gc_req.intimer_fast, 1);
inpcb_sched_timeout(NULL);
break;
default:
atomic_add_32(&ipi->ipi_gc_req.intimer_lazy, 1);
leeway.tv_sec = inpcb_timeout_lazy;
leeway.tv_usec = 0;
inpcb_sched_timeout(&leeway);
break;
}
lck_mtx_unlock(&inpcb_timeout_lock);
}
void
inpcb_timer_sched(struct inpcbinfo *ipi, u_int32_t type)
{
struct timeval leeway;
lck_mtx_lock_spin(&inpcb_timeout_lock);
inpcb_ticking = TRUE;
switch (type) {
case INPCB_TIMER_NODELAY:
atomic_add_32(&ipi->ipi_timer_req.intimer_nodelay, 1);
inpcb_sched_timeout(NULL);
break;
case INPCB_TIMER_FAST:
atomic_add_32(&ipi->ipi_timer_req.intimer_fast, 1);
inpcb_sched_timeout(NULL);
break;
default:
atomic_add_32(&ipi->ipi_timer_req.intimer_lazy, 1);
leeway.tv_sec = inpcb_timeout_lazy;
leeway.tv_usec = 0;
inpcb_sched_timeout(&leeway);
break;
}
lck_mtx_unlock(&inpcb_timeout_lock);
}
void
in_pcbinfo_attach(struct inpcbinfo *ipi)
{
struct inpcbinfo *ipi0;
lck_mtx_lock(&inpcb_lock);
TAILQ_FOREACH(ipi0, &inpcb_head, ipi_entry) {
if (ipi0 == ipi) {
panic("%s: ipi %p already in the list\n",
__func__, ipi);
}
}
TAILQ_INSERT_TAIL(&inpcb_head, ipi, ipi_entry);
lck_mtx_unlock(&inpcb_lock);
}
int
in_pcbinfo_detach(struct inpcbinfo *ipi)
{
struct inpcbinfo *ipi0;
int error = 0;
lck_mtx_lock(&inpcb_lock);
TAILQ_FOREACH(ipi0, &inpcb_head, ipi_entry) {
if (ipi0 == ipi)
break;
}
if (ipi0 != NULL)
TAILQ_REMOVE(&inpcb_head, ipi0, ipi_entry);
else
error = ENXIO;
lck_mtx_unlock(&inpcb_lock);
return (error);
}
int
in_pcballoc(struct socket *so, struct inpcbinfo *pcbinfo, struct proc *p)
{
#pragma unused(p)
struct inpcb *inp;
caddr_t temp;
#if CONFIG_MACF_NET
int mac_error;
#endif
if (!so->cached_in_sock_layer) {
inp = (struct inpcb *)zalloc(pcbinfo->ipi_zone);
if (inp == NULL)
return (ENOBUFS);
bzero((caddr_t)inp, sizeof (*inp));
} else {
inp = (struct inpcb *)(void *)so->so_saved_pcb;
temp = inp->inp_saved_ppcb;
bzero((caddr_t)inp, sizeof (*inp));
inp->inp_saved_ppcb = temp;
}
inp->inp_gencnt = ++pcbinfo->ipi_gencnt;
inp->inp_pcbinfo = pcbinfo;
inp->inp_socket = so;
#if CONFIG_MACF_NET
mac_error = mac_inpcb_label_init(inp, M_WAITOK);
if (mac_error != 0) {
if (!so->cached_in_sock_layer)
zfree(pcbinfo->ipi_zone, inp);
return (mac_error);
}
mac_inpcb_label_associate(so, inp);
#endif
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("%s: insufficient space to align inp_stat", __func__);
}
inp->inp_cstat = (struct inp_stat *)P2ROUNDUP(inp->inp_cstat_store,
sizeof (u_int64_t));
if (((uintptr_t)inp->inp_cstat - (uintptr_t)inp->inp_cstat_store) +
sizeof (*inp->inp_cstat) > sizeof (inp->inp_cstat_store)) {
panic("%s: insufficient space to align inp_cstat", __func__);
}
inp->inp_wstat = (struct inp_stat *)P2ROUNDUP(inp->inp_wstat_store,
sizeof (u_int64_t));
if (((uintptr_t)inp->inp_wstat - (uintptr_t)inp->inp_wstat_store) +
sizeof (*inp->inp_wstat) > sizeof (inp->inp_wstat_store)) {
panic("%s: insufficient space to align inp_wstat", __func__);
}
inp->inp_Wstat = (struct inp_stat *)P2ROUNDUP(inp->inp_Wstat_store,
sizeof (u_int64_t));
if (((uintptr_t)inp->inp_Wstat - (uintptr_t)inp->inp_Wstat_store) +
sizeof (*inp->inp_Wstat) > sizeof (inp->inp_Wstat_store)) {
panic("%s: insufficient space to align inp_Wstat", __func__);
}
so->so_pcb = (caddr_t)inp;
if (so->so_proto->pr_flags & PR_PCBLOCK) {
lck_mtx_init(&inp->inpcb_mtx, pcbinfo->ipi_lock_grp,
pcbinfo->ipi_lock_attr);
}
#if INET6
if (SOCK_DOM(so) == PF_INET6 && !ip6_mapped_addr_on)
inp->inp_flags |= IN6P_IPV6_V6ONLY;
if (ip6_auto_flowlabel)
inp->inp_flags |= IN6P_AUTOFLOWLABEL;
#endif
(void) inp_update_policy(inp);
lck_rw_lock_exclusive(pcbinfo->ipi_lock);
inp->inp_gencnt = ++pcbinfo->ipi_gencnt;
LIST_INSERT_HEAD(pcbinfo->ipi_listhead, inp, inp_list);
pcbinfo->ipi_count++;
lck_rw_done(pcbinfo->ipi_lock);
return (0);
}
struct inpcb *
in_pcblookup_local_and_cleanup(struct inpcbinfo *pcbinfo, struct in_addr laddr,
u_int lport_arg, int wild_okay)
{
struct inpcb *inp;
inp = in_pcblookup_local(pcbinfo, laddr, lport_arg, wild_okay);
if (inp != NULL && inp->inp_wantcnt == WNT_STOPUSING) {
struct socket *so = inp->inp_socket;
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);
}
}
return (inp);
}
static void
in_pcb_conflict_post_msg(u_int16_t port)
{
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);
in_portinuse.req_pid = proc_selfpid();
ev_msg.vendor_code = KEV_VENDOR_APPLE;
ev_msg.kev_class = KEV_NETWORK_CLASS;
ev_msg.kev_subclass = KEV_INET_SUBCLASS;
ev_msg.event_code = KEV_INET_PORTINUSE;
ev_msg.dv[0].data_ptr = &in_portinuse;
ev_msg.dv[0].data_length = sizeof (struct kev_in_portinuse);
ev_msg.dv[1].data_length = 0;
kev_post_msg(&ev_msg);
}
int
in_pcbbind(struct inpcb *inp, struct sockaddr *nam, struct proc *p)
{
struct socket *so = inp->inp_socket;
unsigned short *lastport;
struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
u_short lport = 0, rand_port = 0;
int wild = 0, reuseport = (so->so_options & SO_REUSEPORT);
int error, randomport, conflict = 0;
boolean_t anonport = FALSE;
kauth_cred_t cred;
struct in_addr laddr;
struct ifnet *outif = NULL;
if (TAILQ_EMPTY(&in_ifaddrhead))
return (EADDRNOTAVAIL);
if (inp->inp_lport != 0 || inp->inp_laddr.s_addr != INADDR_ANY)
return (EINVAL);
if (!(so->so_options & (SO_REUSEADDR|SO_REUSEPORT)))
wild = 1;
socket_unlock(so, 0);
lck_rw_lock_exclusive(pcbinfo->ipi_lock);
bzero(&laddr, sizeof(laddr));
if (nam != NULL) {
if (nam->sa_len != sizeof (struct sockaddr_in)) {
lck_rw_done(pcbinfo->ipi_lock);
socket_lock(so, 0);
return (EINVAL);
}
#if 0
if (nam->sa_family != AF_INET) {
lck_rw_done(pcbinfo->ipi_lock);
socket_lock(so, 0);
return (EAFNOSUPPORT);
}
#endif
lport = SIN(nam)->sin_port;
if (IN_MULTICAST(ntohl(SIN(nam)->sin_addr.s_addr))) {
if (so->so_options & SO_REUSEADDR)
reuseport = SO_REUSEADDR|SO_REUSEPORT;
} else if (SIN(nam)->sin_addr.s_addr != INADDR_ANY) {
struct sockaddr_in sin;
struct ifaddr *ifa;
bzero(&sin, sizeof (sin));
sin.sin_family = AF_INET;
sin.sin_len = sizeof (struct sockaddr_in);
sin.sin_addr.s_addr = SIN(nam)->sin_addr.s_addr;
ifa = ifa_ifwithaddr(SA(&sin));
if (ifa == NULL) {
lck_rw_done(pcbinfo->ipi_lock);
socket_lock(so, 0);
return (EADDRNOTAVAIL);
} else {
IFA_LOCK(ifa);
outif = ifa->ifa_ifp;
IFA_UNLOCK(ifa);
IFA_REMREF(ifa);
}
}
if (lport != 0) {
struct inpcb *t;
uid_t u;
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->ipi_lock);
socket_lock(so, 0);
return (EACCES);
}
}
if (!IN_MULTICAST(ntohl(SIN(nam)->sin_addr.s_addr)) &&
(u = kauth_cred_getuid(so->so_cred)) != 0 &&
(t = in_pcblookup_local_and_cleanup(
inp->inp_pcbinfo, SIN(nam)->sin_addr, lport,
INPLOOKUP_WILDCARD)) != NULL &&
(SIN(nam)->sin_addr.s_addr != INADDR_ANY ||
t->inp_laddr.s_addr != INADDR_ANY ||
!(t->inp_socket->so_options & SO_REUSEPORT)) &&
(u != kauth_cred_getuid(t->inp_socket->so_cred)) &&
!(t->inp_socket->so_flags & SOF_REUSESHAREUID) &&
(SIN(nam)->sin_addr.s_addr != INADDR_ANY ||
t->inp_laddr.s_addr != INADDR_ANY)) {
if ((t->inp_socket->so_flags &
SOF_NOTIFYCONFLICT) &&
!(so->so_flags & SOF_NOTIFYCONFLICT))
conflict = 1;
lck_rw_done(pcbinfo->ipi_lock);
if (conflict)
in_pcb_conflict_post_msg(lport);
socket_lock(so, 0);
return (EADDRINUSE);
}
t = in_pcblookup_local_and_cleanup(pcbinfo,
SIN(nam)->sin_addr, lport, wild);
if (t != NULL &&
(reuseport & t->inp_socket->so_options) == 0) {
#if INET6
if (SIN(nam)->sin_addr.s_addr != INADDR_ANY ||
t->inp_laddr.s_addr != INADDR_ANY ||
SOCK_DOM(so) != PF_INET6 ||
SOCK_DOM(t->inp_socket) != PF_INET6)
#endif
{
if ((t->inp_socket->so_flags &
SOF_NOTIFYCONFLICT) &&
!(so->so_flags & SOF_NOTIFYCONFLICT))
conflict = 1;
lck_rw_done(pcbinfo->ipi_lock);
if (conflict)
in_pcb_conflict_post_msg(lport);
socket_lock(so, 0);
return (EADDRINUSE);
}
}
}
laddr = SIN(nam)->sin_addr;
}
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);
anonport = TRUE;
if (inp->inp_flags & INP_HIGHPORT) {
first = ipport_hifirstauto;
last = ipport_hilastauto;
lastport = &pcbinfo->ipi_lasthi;
} else if (inp->inp_flags & INP_LOWPORT) {
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 (error);
}
first = ipport_lowfirstauto;
last = ipport_lowlastauto;
lastport = &pcbinfo->ipi_lastlow;
} else {
first = ipport_firstauto;
last = ipport_lastauto;
lastport = &pcbinfo->ipi_lastport;
}
if (first == last)
randomport = 0;
if (first > last) {
if (randomport) {
read_random(&rand_port, sizeof (rand_port));
*lastport =
first - (rand_port % (first - last));
}
count = first - last;
do {
if (count-- < 0) {
lck_rw_done(pcbinfo->ipi_lock);
socket_lock(so, 0);
return (EADDRNOTAVAIL);
}
--*lastport;
if (*lastport > first || *lastport < last)
*lastport = first;
lport = htons(*lastport);
} while (in_pcblookup_local_and_cleanup(pcbinfo,
((laddr.s_addr != INADDR_ANY) ? laddr :
inp->inp_laddr), lport, wild));
} else {
if (randomport) {
read_random(&rand_port, sizeof (rand_port));
*lastport =
first + (rand_port % (first - last));
}
count = last - first;
do {
if (count-- < 0) {
lck_rw_done(pcbinfo->ipi_lock);
socket_lock(so, 0);
return (EADDRNOTAVAIL);
}
++*lastport;
if (*lastport < first || *lastport > last)
*lastport = first;
lport = htons(*lastport);
} while (in_pcblookup_local_and_cleanup(pcbinfo,
((laddr.s_addr != INADDR_ANY) ? laddr :
inp->inp_laddr), lport, wild));
}
}
socket_lock(so, 0);
if (inp->inp_lport != 0 || inp->inp_laddr.s_addr != INADDR_ANY) {
lck_rw_done(pcbinfo->ipi_lock);
return (EINVAL);
}
if (laddr.s_addr != INADDR_ANY) {
inp->inp_laddr = laddr;
inp->inp_last_outifp = outif;
}
inp->inp_lport = lport;
if (anonport)
inp->inp_flags |= INP_ANONPORT;
if (in_pcbinshash(inp, 1) != 0) {
inp->inp_laddr.s_addr = INADDR_ANY;
inp->inp_last_outifp = NULL;
inp->inp_lport = 0;
if (anonport)
inp->inp_flags &= ~INP_ANONPORT;
lck_rw_done(pcbinfo->ipi_lock);
return (EAGAIN);
}
lck_rw_done(pcbinfo->ipi_lock);
sflt_notify(so, sock_evt_bound, NULL);
return (0);
}
int
in_pcbladdr(struct inpcb *inp, struct sockaddr *nam, struct in_addr *laddr,
unsigned int ifscope, struct ifnet **outif)
{
struct route *ro = &inp->inp_route;
struct in_ifaddr *ia = NULL;
struct sockaddr_in sin;
int error = 0;
boolean_t restricted = FALSE;
if (outif != NULL)
*outif = NULL;
if (nam->sa_len != sizeof (struct sockaddr_in))
return (EINVAL);
if (SIN(nam)->sin_family != AF_INET)
return (EAFNOSUPPORT);
if (SIN(nam)->sin_port == 0)
return (EADDRNOTAVAIL);
if (SIN(nam)->sin_addr.s_addr == INADDR_ANY ||
SIN(nam)->sin_addr.s_addr == (u_int32_t)INADDR_BROADCAST) {
lck_rw_lock_shared(in_ifaddr_rwlock);
if (!TAILQ_EMPTY(&in_ifaddrhead)) {
ia = TAILQ_FIRST(&in_ifaddrhead);
IFA_LOCK_SPIN(&ia->ia_ifa);
if (SIN(nam)->sin_addr.s_addr == INADDR_ANY) {
SIN(nam)->sin_addr = IA_SIN(ia)->sin_addr;
} else if (ia->ia_ifp->if_flags & IFF_BROADCAST) {
SIN(nam)->sin_addr =
SIN(&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) {
VERIFY(ia == NULL);
*laddr = inp->inp_laddr;
return (0);
}
if (ifscope == IFSCOPE_NONE && (inp->inp_flags & INP_BOUND_IF))
ifscope = inp->inp_boundifp->if_index;
if (ro->ro_rt != NULL)
RT_LOCK_SPIN(ro->ro_rt);
if (ROUTE_UNUSABLE(ro) || ro->ro_dst.sa_family != AF_INET ||
SIN(&ro->ro_dst)->sin_addr.s_addr != SIN(nam)->sin_addr.s_addr ||
(inp->inp_socket->so_options & SO_DONTROUTE)) {
if (ro->ro_rt != NULL)
RT_UNLOCK(ro->ro_rt);
ROUTE_RELEASE(ro);
}
if (!(inp->inp_socket->so_options & SO_DONTROUTE) &&
(ro->ro_rt == NULL || ro->ro_rt->rt_ifp == NULL)) {
if (ro->ro_rt != NULL)
RT_UNLOCK(ro->ro_rt);
ROUTE_RELEASE(ro);
bzero(&ro->ro_dst, sizeof (struct sockaddr_in));
ro->ro_dst.sa_family = AF_INET;
ro->ro_dst.sa_len = sizeof (struct sockaddr_in);
SIN(&ro->ro_dst)->sin_addr = SIN(nam)->sin_addr;
rtalloc_scoped(ro, ifscope);
if (ro->ro_rt != NULL)
RT_LOCK_SPIN(ro->ro_rt);
}
bzero(&sin, sizeof (sin));
sin.sin_family = AF_INET;
sin.sin_len = sizeof (struct sockaddr_in);
sin.sin_addr.s_addr = SIN(nam)->sin_addr.s_addr;
if (ro->ro_rt == NULL) {
VERIFY(ia == NULL);
ia = ifatoia(ifa_ifwithdstaddr(SA(&sin)));
if (ia == NULL)
ia = ifatoia(ifa_ifwithnet_scoped(SA(&sin), ifscope));
error = ((ia == NULL) ? ENETUNREACH : 0);
goto done;
}
RT_LOCK_ASSERT_HELD(ro->ro_rt);
if (!(ro->ro_rt->rt_ifp->if_flags & IFF_LOOPBACK)) {
VERIFY(ia == NULL);
if (inp_restricted_send(inp, ro->ro_rt->rt_ifp)) {
RT_UNLOCK(ro->ro_rt);
ROUTE_RELEASE(ro);
error = EHOSTUNREACH;
restricted = TRUE;
} else {
RT_CONVERT_LOCK(ro->ro_rt);
ia = ifatoia(ro->ro_rt->rt_ifa);
IFA_ADDREF(&ia->ia_ifa);
RT_UNLOCK(ro->ro_rt);
error = 0;
}
goto done;
}
VERIFY(ro->ro_rt->rt_ifp->if_flags & IFF_LOOPBACK);
RT_UNLOCK(ro->ro_rt);
VERIFY(ia == NULL);
ia = ifatoia(ifa_ifwithdstaddr(SA(&sin)));
if (ia == NULL)
ia = ifatoia(ifa_ifwithaddr_scoped(SA(&sin), ifscope));
if (ia == NULL)
ia = ifatoia(ifa_ifwithnet_scoped(SA(&sin), ifscope));
if (ia == NULL) {
RT_LOCK(ro->ro_rt);
ia = ifatoia(ro->ro_rt->rt_ifa);
if (ia != NULL)
IFA_ADDREF(&ia->ia_ifa);
RT_UNLOCK(ro->ro_rt);
}
error = ((ia == NULL) ? ENETUNREACH : 0);
done:
if (IN_MULTICAST(ntohl(SIN(nam)->sin_addr.s_addr)) &&
inp->inp_moptions != NULL) {
struct ip_moptions *imo;
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 != NULL)
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 != NULL)
IFA_ADDREF(&ia->ia_ifa);
lck_rw_done(in_ifaddr_rwlock);
if (ia == NULL)
error = EADDRNOTAVAIL;
else
error = 0;
}
IMO_UNLOCK(imo);
}
if (ia != NULL) {
IFA_LOCK_SPIN(&ia->ia_ifa);
if (inp_restricted_send(inp, ia->ia_ifa.ifa_ifp)) {
IFA_UNLOCK(&ia->ia_ifa);
error = EHOSTUNREACH;
restricted = TRUE;
} else if (error == 0) {
*laddr = ia->ia_addr.sin_addr;
if (outif != NULL) {
struct ifnet *ifp;
if (ro->ro_rt != NULL)
ifp = ro->ro_rt->rt_ifp;
else
ifp = ia->ia_ifp;
VERIFY(ifp != NULL);
IFA_CONVERT_LOCK(&ia->ia_ifa);
ifnet_reference(ifp);
if (*outif != NULL)
ifnet_release(*outif);
*outif = ifp;
}
IFA_UNLOCK(&ia->ia_ifa);
} else {
IFA_UNLOCK(&ia->ia_ifa);
}
IFA_REMREF(&ia->ia_ifa);
ia = NULL;
}
if (restricted && error == EHOSTUNREACH) {
soevent(inp->inp_socket, (SO_FILT_HINT_LOCKED |
SO_FILT_HINT_IFDENIED));
}
return (error);
}
int
in_pcbconnect(struct inpcb *inp, struct sockaddr *nam, struct proc *p,
unsigned int ifscope, struct ifnet **outif)
{
struct in_addr laddr;
struct sockaddr_in *sin = (struct sockaddr_in *)(void *)nam;
struct inpcb *pcb;
int error;
struct socket *so = inp->inp_socket;
if ((error = in_pcbladdr(inp, nam, &laddr, ifscope, outif)) != 0)
return (error);
socket_unlock(so, 0);
pcb = in_pcblookup_hash(inp->inp_pcbinfo, sin->sin_addr, sin->sin_port,
inp->inp_laddr.s_addr ? inp->inp_laddr : laddr,
inp->inp_lport, 0, NULL);
socket_lock(so, 0);
if ((so->so_flags & SOF_ABORTED) != 0)
return (ECONNREFUSED);
if (pcb != NULL) {
in_pcb_checkstate(pcb, WNT_RELEASE, pcb == inp ? 1 : 0);
return (EADDRINUSE);
}
if (inp->inp_laddr.s_addr == INADDR_ANY) {
if (inp->inp_lport == 0) {
error = in_pcbbind(inp, NULL, p);
if (error)
return (error);
}
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->inp_laddr = laddr;
inp->inp_last_outifp = (outif != NULL) ? *outif : NULL;
inp->inp_flags |= INP_INADDR_ANY;
} else {
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->inp_faddr = sin->sin_addr;
inp->inp_fport = sin->sin_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);
return (0);
}
void
in_pcbdisconnect(struct inpcb *inp)
{
struct socket *so = inp->inp_socket;
if (nstat_collect && SOCK_PROTO(so) == IPPROTO_UDP)
nstat_pcb_cache(inp);
inp->inp_faddr.s_addr = INADDR_ANY;
inp->inp_fport = 0;
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);
}
in_pcbrehash(inp);
lck_rw_done(inp->inp_pcbinfo->ipi_lock);
if (!(so->so_flags & SOF_MP_SUBFLOW) && (so->so_state & SS_NOFDREF))
in_pcbdetach(inp);
}
void
in_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->inp_sp != NULL) {
(void) ipsec4_delete_pcbpolicy(inp);
}
#endif
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;
inp->inp_vflag = 0;
if (inp->inp_options != NULL) {
(void) m_free(inp->inp_options);
inp->inp_options = NULL;
}
ROUTE_RELEASE(&inp->inp_route);
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;
inpcb_gc_sched(inp->inp_pcbinfo, INPCB_TIMER_FAST);
}
}
void
in_pcbdispose(struct inpcb *inp)
{
struct socket *so = inp->inp_socket;
struct inpcbinfo *ipi = inp->inp_pcbinfo;
if (so != NULL && so->so_usecount != 0) {
panic("%s: so %p [%d,%d] usecount %d lockhistory %s\n",
__func__, so, SOCK_DOM(so), SOCK_TYPE(so), so->so_usecount,
solockhistory_nr(so));
} else if (inp->inp_wantcnt != WNT_STOPUSING) {
if (so != NULL) {
panic_plain("%s: inp %p invalid wantcnt %d, so %p "
"[%d,%d] usecount %d retaincnt %d state 0x%x "
"flags 0x%x lockhistory %s\n", __func__, inp,
inp->inp_wantcnt, so, SOCK_DOM(so), SOCK_TYPE(so),
so->so_usecount, so->so_retaincnt, so->so_state,
so->so_flags, solockhistory_nr(so));
} else {
panic("%s: inp %p invalid wantcnt %d no socket\n",
__func__, inp, inp->inp_wantcnt);
}
}
lck_rw_assert(ipi->ipi_lock, LCK_RW_ASSERT_EXCLUSIVE);
inp->inp_gencnt = ++ipi->ipi_gencnt;
in_pcbremlists(inp);
if (so != NULL) {
if (so->so_proto->pr_flags & PR_PCBLOCK) {
sofreelastref(so, 0);
if (so->so_rcv.sb_cc > 0 || so->so_snd.sb_cc > 0) {
sbrelease(&so->so_rcv);
sbrelease(&so->so_snd);
}
if (so->so_head != NULL) {
panic("%s: so=%p head still exist\n",
__func__, so);
}
lck_mtx_unlock(&inp->inpcb_mtx);
lck_mtx_destroy(&inp->inpcb_mtx, ipi->ipi_lock_grp);
}
so->so_flags |= SOF_PCBCLEARING;
so->so_saved_pcb = (caddr_t)inp;
so->so_pcb = NULL;
inp->inp_socket = NULL;
#if CONFIG_MACF_NET
mac_inpcb_label_destroy(inp);
#endif
ROUTE_RELEASE(&inp->inp_route);
if (!so->cached_in_sock_layer) {
zfree(ipi->ipi_zone, inp);
}
sodealloc(so);
}
}
int
in_getsockaddr(struct socket *so, struct sockaddr **nam)
{
struct inpcb *inp;
struct sockaddr_in *sin;
MALLOC(sin, struct sockaddr_in *, sizeof (*sin), M_SONAME, M_WAITOK);
if (sin == NULL)
return (ENOBUFS);
bzero(sin, sizeof (*sin));
sin->sin_family = AF_INET;
sin->sin_len = sizeof (*sin);
if ((inp = sotoinpcb(so)) == NULL) {
FREE(sin, M_SONAME);
return (EINVAL);
}
sin->sin_port = inp->inp_lport;
sin->sin_addr = inp->inp_laddr;
*nam = (struct sockaddr *)sin;
return (0);
}
int
in_getsockaddr_s(struct socket *so, struct sockaddr_storage *ss)
{
struct sockaddr_in *sin = SIN(ss);
struct inpcb *inp;
VERIFY(ss != NULL);
bzero(ss, sizeof (*ss));
sin->sin_family = AF_INET;
sin->sin_len = sizeof (*sin);
if ((inp = sotoinpcb(so)) == NULL
#if NECP
|| (necp_socket_should_use_flow_divert(inp))
#endif
)
return (inp == NULL ? EINVAL : EPROTOTYPE);
sin->sin_port = inp->inp_lport;
sin->sin_addr = inp->inp_laddr;
return (0);
}
int
in_getpeeraddr(struct socket *so, struct sockaddr **nam)
{
struct inpcb *inp;
struct sockaddr_in *sin;
MALLOC(sin, struct sockaddr_in *, sizeof (*sin), M_SONAME, M_WAITOK);
if (sin == NULL)
return (ENOBUFS);
bzero((caddr_t)sin, sizeof (*sin));
sin->sin_family = AF_INET;
sin->sin_len = sizeof (*sin);
if ((inp = sotoinpcb(so)) == NULL) {
FREE(sin, M_SONAME);
return (EINVAL);
}
sin->sin_port = inp->inp_fport;
sin->sin_addr = inp->inp_faddr;
*nam = (struct sockaddr *)sin;
return (0);
}
int
in_getpeeraddr_s(struct socket *so, struct sockaddr_storage *ss)
{
struct sockaddr_in *sin = SIN(ss);
struct inpcb *inp;
VERIFY(ss != NULL);
bzero(ss, sizeof (*ss));
sin->sin_family = AF_INET;
sin->sin_len = sizeof (*sin);
if ((inp = sotoinpcb(so)) == NULL
#if NECP
|| (necp_socket_should_use_flow_divert(inp))
#endif
) {
return (inp == NULL ? EINVAL : EPROTOTYPE);
}
sin->sin_port = inp->inp_fport;
sin->sin_addr = inp->inp_faddr;
return (0);
}
void
in_pcbnotifyall(struct inpcbinfo *pcbinfo, struct in_addr faddr,
int errno, void (*notify)(struct inpcb *, int))
{
struct inpcb *inp;
lck_rw_lock_shared(pcbinfo->ipi_lock);
LIST_FOREACH(inp, pcbinfo->ipi_listhead, inp_list) {
#if INET6
if (!(inp->inp_vflag & INP_IPV4))
continue;
#endif
if (inp->inp_faddr.s_addr != faddr.s_addr ||
inp->inp_socket == NULL)
continue;
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);
}
void
in_losing(struct inpcb *inp)
{
boolean_t release = FALSE;
struct rtentry *rt;
struct rt_addrinfo info;
if ((rt = inp->inp_route.ro_rt) != NULL) {
struct in_ifaddr *ia = NULL;
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) {
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);
}
if (inp->inp_laddr.s_addr != INADDR_ANY &&
(ia = ifa_foraddr(inp->inp_laddr.s_addr)) != NULL) {
release = TRUE;
}
if (ia != NULL)
IFA_REMREF(&ia->ia_ifa);
}
if (rt == NULL || release)
ROUTE_RELEASE(&inp->inp_route);
}
void
in_rtchange(struct inpcb *inp, int errno)
{
#pragma unused(errno)
boolean_t release = FALSE;
struct rtentry *rt;
if ((rt = inp->inp_route.ro_rt) != NULL) {
struct in_ifaddr *ia = NULL;
if (inp->inp_laddr.s_addr != INADDR_ANY &&
(ia = ifa_foraddr(inp->inp_laddr.s_addr)) != NULL) {
release = TRUE;
}
if (ia != NULL)
IFA_REMREF(&ia->ia_ifa);
}
if (rt == NULL || release)
ROUTE_RELEASE(&inp->inp_route);
}
struct inpcb *
in_pcblookup_local(struct inpcbinfo *pcbinfo, struct in_addr laddr,
unsigned int lport_arg, int wild_okay)
{
struct inpcb *inp;
int matchwild = 3, wildcard;
u_short lport = lport_arg;
KERNEL_DEBUG(DBG_FNC_PCB_LOOKUP | DBG_FUNC_START, 0, 0, 0, 0, 0);
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 INET6
if (!(inp->inp_vflag & INP_IPV4))
continue;
#endif
if (inp->inp_faddr.s_addr == INADDR_ANY &&
inp->inp_laddr.s_addr == laddr.s_addr &&
inp->inp_lport == lport) {
return (inp);
}
}
KERNEL_DEBUG(DBG_FNC_PCB_LOOKUP | DBG_FUNC_END, 0, 0, 0, 0, 0);
return (NULL);
} else {
struct inpcbporthead *porthash;
struct inpcbport *phd;
struct inpcb *match = 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 INET6
if (!(inp->inp_vflag & INP_IPV4))
continue;
#endif
if (inp->inp_faddr.s_addr != INADDR_ANY)
wildcard++;
if (inp->inp_laddr.s_addr != INADDR_ANY) {
if (laddr.s_addr == INADDR_ANY)
wildcard++;
else if (inp->inp_laddr.s_addr !=
laddr.s_addr)
continue;
} else {
if (laddr.s_addr != INADDR_ANY)
wildcard++;
}
if (wildcard < matchwild) {
match = inp;
matchwild = wildcard;
if (matchwild == 0) {
break;
}
}
}
}
KERNEL_DEBUG(DBG_FNC_PCB_LOOKUP | DBG_FUNC_END, match,
0, 0, 0, 0);
return (match);
}
}
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, struct ifnet *ifp)
{
struct inpcbhead *head;
struct inpcb *inp;
u_short fport = fport_arg, lport = lport_arg;
int found = 0;
struct inpcb *local_wild = NULL;
#if INET6
struct inpcb *local_wild_mapped = NULL;
#endif
*uid = UID_MAX;
*gid = GID_MAX;
lck_rw_lock_shared(pcbinfo->ipi_lock);
head = &pcbinfo->ipi_hashbase[INP_PCBHASH(faddr.s_addr, lport, fport,
pcbinfo->ipi_hashmask)];
LIST_FOREACH(inp, head, inp_hash) {
#if INET6
if (!(inp->inp_vflag & INP_IPV4))
continue;
#endif
if (inp_restricted_recv(inp, ifp))
continue;
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))) {
*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) {
lck_rw_done(pcbinfo->ipi_lock);
return (0);
}
head = &pcbinfo->ipi_hashbase[INP_PCBHASH(INADDR_ANY, lport, 0,
pcbinfo->ipi_hashmask)];
LIST_FOREACH(inp, head, inp_hash) {
#if INET6
if (!(inp->inp_vflag & INP_IPV4))
continue;
#endif
if (inp_restricted_recv(inp, ifp))
continue;
if (inp->inp_faddr.s_addr == INADDR_ANY &&
inp->inp_lport == lport) {
if (inp->inp_laddr.s_addr == laddr.s_addr) {
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);
} else if (inp->inp_laddr.s_addr == INADDR_ANY) {
#if INET6
if (inp->inp_socket &&
SOCK_CHECK_DOM(inp->inp_socket, PF_INET6))
local_wild_mapped = inp;
else
#endif
local_wild = inp;
}
}
}
if (local_wild == NULL) {
#if INET6
if (local_wild_mapped != NULL) {
if ((found = (local_wild_mapped->inp_socket != NULL))) {
*uid = kauth_cred_getuid(
local_wild_mapped->inp_socket->so_cred);
*gid = kauth_cred_getgid(
local_wild_mapped->inp_socket->so_cred);
}
lck_rw_done(pcbinfo->ipi_lock);
return (found);
}
#endif
lck_rw_done(pcbinfo->ipi_lock);
return (0);
}
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);
}
struct inpcb *
in_pcblookup_hash(struct inpcbinfo *pcbinfo, struct in_addr faddr,
u_int fport_arg, struct in_addr laddr, u_int lport_arg, int wildcard,
struct ifnet *ifp)
{
struct inpcbhead *head;
struct inpcb *inp;
u_short fport = fport_arg, lport = lport_arg;
struct inpcb *local_wild = NULL;
#if INET6
struct inpcb *local_wild_mapped = NULL;
#endif
lck_rw_lock_shared(pcbinfo->ipi_lock);
head = &pcbinfo->ipi_hashbase[INP_PCBHASH(faddr.s_addr, lport, fport,
pcbinfo->ipi_hashmask)];
LIST_FOREACH(inp, head, inp_hash) {
#if INET6
if (!(inp->inp_vflag & INP_IPV4))
continue;
#endif
if (inp_restricted_recv(inp, ifp))
continue;
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 (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) {
lck_rw_done(pcbinfo->ipi_lock);
return (NULL);
}
head = &pcbinfo->ipi_hashbase[INP_PCBHASH(INADDR_ANY, lport, 0,
pcbinfo->ipi_hashmask)];
LIST_FOREACH(inp, head, inp_hash) {
#if INET6
if (!(inp->inp_vflag & INP_IPV4))
continue;
#endif
if (inp_restricted_recv(inp, ifp))
continue;
if (inp->inp_faddr.s_addr == INADDR_ANY &&
inp->inp_lport == lport) {
if (inp->inp_laddr.s_addr == laddr.s_addr) {
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 (inp->inp_laddr.s_addr == INADDR_ANY) {
#if INET6
if (SOCK_CHECK_DOM(inp->inp_socket, PF_INET6))
local_wild_mapped = inp;
else
#endif
local_wild = inp;
}
}
}
if (local_wild == NULL) {
#if INET6
if (local_wild_mapped != NULL) {
if (in_pcb_checkstate(local_wild_mapped,
WNT_ACQUIRE, 0) != WNT_STOPUSING) {
lck_rw_done(pcbinfo->ipi_lock);
return (local_wild_mapped);
} else {
lck_rw_done(pcbinfo->ipi_lock);
return (NULL);
}
}
#endif
lck_rw_done(pcbinfo->ipi_lock);
return (NULL);
}
if (in_pcb_checkstate(local_wild, WNT_ACQUIRE, 0) != WNT_STOPUSING) {
lck_rw_done(pcbinfo->ipi_lock);
return (local_wild);
}
lck_rw_done(pcbinfo->ipi_lock);
return (NULL);
}
int
in_pcbinshash(struct inpcb *inp, int locked)
{
struct inpcbhead *pcbhash;
struct inpcbporthead *pcbporthash;
struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
struct inpcbport *phd;
u_int32_t hashkey_faddr;
if (!locked) {
if (!lck_rw_try_lock_exclusive(pcbinfo->ipi_lock)) {
socket_unlock(inp->inp_socket, 0);
lck_rw_lock_exclusive(pcbinfo->ipi_lock);
socket_lock(inp->inp_socket, 0);
if (inp->inp_state == INPCB_STATE_DEAD) {
lck_rw_done(pcbinfo->ipi_lock);
return (ECONNABORTED);
}
}
}
#if INET6
if (inp->inp_vflag & INP_IPV6)
hashkey_faddr = inp->in6p_faddr.s6_addr32[3] ;
else
#endif
hashkey_faddr = inp->inp_faddr.s_addr;
inp->inp_hash_element = INP_PCBHASH(hashkey_faddr, inp->inp_lport,
inp->inp_fport, pcbinfo->ipi_hashmask);
pcbhash = &pcbinfo->ipi_hashbase[inp->inp_hash_element];
pcbporthash = &pcbinfo->ipi_porthashbase[INP_PCBPORTHASH(inp->inp_lport,
pcbinfo->ipi_porthashmask)];
LIST_FOREACH(phd, pcbporthash, phd_hash) {
if (phd->phd_port == inp->inp_lport)
break;
}
VERIFY(inp->inp_state != INPCB_STATE_DEAD);
if (phd == NULL) {
MALLOC(phd, struct inpcbport *, sizeof (struct inpcbport),
M_PCB, M_WAITOK);
if (phd == NULL) {
if (!locked)
lck_rw_done(pcbinfo->ipi_lock);
return (ENOBUFS);
}
phd->phd_port = inp->inp_lport;
LIST_INIT(&phd->phd_pcblist);
LIST_INSERT_HEAD(pcbporthash, phd, phd_hash);
}
VERIFY(!(inp->inp_flags2 & INP2_INHASHLIST));
inp->inp_phd = phd;
LIST_INSERT_HEAD(&phd->phd_pcblist, inp, inp_portlist);
LIST_INSERT_HEAD(pcbhash, inp, inp_hash);
inp->inp_flags2 |= INP2_INHASHLIST;
if (!locked)
lck_rw_done(pcbinfo->ipi_lock);
#if NECP
inp_update_necp_policy(inp, NULL, NULL, 0);
#endif
return (0);
}
void
in_pcbrehash(struct inpcb *inp)
{
struct inpcbhead *head;
u_int32_t hashkey_faddr;
#if INET6
if (inp->inp_vflag & INP_IPV6)
hashkey_faddr = inp->in6p_faddr.s6_addr32[3] ;
else
#endif
hashkey_faddr = inp->inp_faddr.s_addr;
inp->inp_hash_element = INP_PCBHASH(hashkey_faddr, inp->inp_lport,
inp->inp_fport, inp->inp_pcbinfo->ipi_hashmask);
head = &inp->inp_pcbinfo->ipi_hashbase[inp->inp_hash_element];
if (inp->inp_flags2 & INP2_INHASHLIST) {
LIST_REMOVE(inp, inp_hash);
inp->inp_flags2 &= ~INP2_INHASHLIST;
}
VERIFY(!(inp->inp_flags2 & INP2_INHASHLIST));
LIST_INSERT_HEAD(head, inp, inp_hash);
inp->inp_flags2 |= INP2_INHASHLIST;
#if NECP
inp_update_necp_policy(inp, NULL, NULL, 0);
#endif
}
void
in_pcbremlists(struct inpcb *inp)
{
inp->inp_gencnt = ++inp->inp_pcbinfo->ipi_gencnt;
if (inp->inp_flags2 & INP2_INHASHLIST) {
struct inpcbport *phd = inp->inp_phd;
VERIFY(phd != NULL && inp->inp_lport > 0);
LIST_REMOVE(inp, inp_hash);
inp->inp_hash.le_next = NULL;
inp->inp_hash.le_prev = NULL;
LIST_REMOVE(inp, inp_portlist);
inp->inp_portlist.le_next = NULL;
inp->inp_portlist.le_prev = NULL;
if (LIST_EMPTY(&phd->phd_pcblist)) {
LIST_REMOVE(phd, phd_hash);
FREE(phd, M_PCB);
}
inp->inp_phd = NULL;
inp->inp_flags2 &= ~INP2_INHASHLIST;
}
VERIFY(!(inp->inp_flags2 & INP2_INHASHLIST));
if (inp->inp_flags2 & INP2_TIMEWAIT) {
tcp_remove_from_time_wait(inp);
inp->inp_flags2 &= ~INP2_TIMEWAIT;
VERIFY(inp->inp_pcbinfo->ipi_twcount != 0);
inp->inp_pcbinfo->ipi_twcount--;
} else {
LIST_REMOVE(inp, inp_list);
}
if (inp->inp_flags2 & INP2_IN_FCTREE) {
inp_fc_getinp(inp->inp_flowhash, (INPFC_SOLOCKED|INPFC_REMOVE));
VERIFY(!(inp->inp_flags2 & INP2_IN_FCTREE));
}
inp->inp_pcbinfo->ipi_count--;
}
int
in_pcb_checkstate(struct inpcb *pcb, int mode, int locked)
{
volatile UInt32 *wantcnt = (volatile UInt32 *)&pcb->inp_wantcnt;
UInt32 origwant;
UInt32 newwant;
switch (mode) {
case WNT_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("%s: pcb=%p so=%p usecount is negative\n",
__func__, pcb, pcb->inp_socket);
}
if (locked == 0)
socket_unlock(pcb->inp_socket, 1);
inpcb_gc_sched(pcb->inp_pcbinfo, INPCB_TIMER_FAST);
origwant = *wantcnt;
if ((UInt16) origwant == 0xffff)
return (WNT_STOPUSING);
newwant = 0xffff;
if ((UInt16) origwant == 0) {
OSCompareAndSwap(origwant, newwant, wantcnt);
}
return (WNT_STOPUSING);
break;
case WNT_ACQUIRE:
do {
origwant = *wantcnt;
if ((UInt16) origwant == 0xffff) {
return (WNT_STOPUSING);
}
newwant = origwant + 1;
} while (!OSCompareAndSwap(origwant, newwant, wantcnt));
return (WNT_ACQUIRE);
break;
case WNT_RELEASE:
if (locked == 0)
socket_lock(pcb->inp_socket, 1);
do {
origwant = *wantcnt;
if ((UInt16) origwant == 0x0) {
panic("%s: pcb=%p release with zero count",
__func__, pcb);
}
if ((UInt16) origwant == 0xffff) {
if (locked == 0)
socket_unlock(pcb->inp_socket, 1);
return (WNT_STOPUSING);
}
newwant = origwant - 1;
} while (!OSCompareAndSwap(origwant, newwant, wantcnt));
if (pcb->inp_state == INPCB_STATE_DEAD)
goto stopusing;
if (pcb->inp_socket->so_usecount < 0) {
panic("%s: RELEASE pcb=%p so=%p usecount is negative\n",
__func__, pcb, pcb->inp_socket);
}
if (locked == 0)
socket_unlock(pcb->inp_socket, 1);
return (WNT_RELEASE);
break;
default:
panic("%s: so=%p not a valid state =%x\n", __func__,
pcb->inp_socket, mode);
}
return (mode);
}
void
inpcb_to_compat(struct inpcb *inp, struct inpcb_compat *inp_compat)
{
bzero(inp_compat, sizeof (*inp_compat));
inp_compat->inp_fport = inp->inp_fport;
inp_compat->inp_lport = inp->inp_lport;
inp_compat->nat_owner = 0;
inp_compat->nat_cookie = 0;
inp_compat->inp_gencnt = inp->inp_gencnt;
inp_compat->inp_flags = inp->inp_flags;
inp_compat->inp_flow = inp->inp_flow;
inp_compat->inp_vflag = inp->inp_vflag;
inp_compat->inp_ip_ttl = inp->inp_ip_ttl;
inp_compat->inp_ip_p = inp->inp_ip_p;
inp_compat->inp_dependfaddr.inp6_foreign =
inp->inp_dependfaddr.inp6_foreign;
inp_compat->inp_dependladdr.inp6_local =
inp->inp_dependladdr.inp6_local;
inp_compat->inp_depend4.inp4_ip_tos = inp->inp_depend4.inp4_ip_tos;
inp_compat->inp_depend6.inp6_hlim = 0;
inp_compat->inp_depend6.inp6_cksum = inp->inp_depend6.inp6_cksum;
inp_compat->inp_depend6.inp6_ifindex = 0;
inp_compat->inp_depend6.inp6_hops = inp->inp_depend6.inp6_hops;
}
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 = 0;
xinp->inp_depend6.inp6_cksum = inp->inp_depend6.inp6_cksum;
xinp->inp_depend6.inp6_ifindex = 0;
xinp->inp_depend6.inp6_hops = inp->inp_depend6.inp6_hops;
}
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 (ROUTE_UNUSABLE(src) || rt_key(src->ro_rt)->sa_family != AF_INET)
ROUTE_RELEASE(src);
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);
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));
}
int
inp_bindif(struct inpcb *inp, unsigned int ifscope, struct ifnet **pifp)
{
struct ifnet *ifp = NULL;
ifnet_head_lock_shared();
if ((ifscope > (unsigned)if_index) || (ifscope != IFSCOPE_NONE &&
(ifp = ifindex2ifnet[ifscope]) == NULL)) {
ifnet_head_done();
return (ENXIO);
}
ifnet_head_done();
VERIFY(ifp != NULL || ifscope == IFSCOPE_NONE);
inp->inp_boundifp = ifp;
if (inp->inp_boundifp == NULL)
inp->inp_flags &= ~INP_BOUND_IF;
else
inp->inp_flags |= INP_BOUND_IF;
ROUTE_RELEASE(&inp->inp_route);
if (pifp != NULL)
*pifp = ifp;
return (0);
}
void
inp_set_nocellular(struct inpcb *inp)
{
inp->inp_flags |= INP_NO_IFT_CELLULAR;
ROUTE_RELEASE(&inp->inp_route);
}
void
inp_clear_nocellular(struct inpcb *inp)
{
struct socket *so = inp->inp_socket;
if (so != NULL && !(so->so_restrictions & SO_RESTRICT_DENY_CELLULAR)) {
inp->inp_flags &= ~INP_NO_IFT_CELLULAR;
ROUTE_RELEASE(&inp->inp_route);
}
}
void
inp_set_noexpensive(struct inpcb *inp)
{
inp->inp_flags2 |= INP2_NO_IFF_EXPENSIVE;
ROUTE_RELEASE(&inp->inp_route);
}
void
inp_set_awdl_unrestricted(struct inpcb *inp)
{
inp->inp_flags2 |= INP2_AWDL_UNRESTRICTED;
ROUTE_RELEASE(&inp->inp_route);
}
boolean_t
inp_get_awdl_unrestricted(struct inpcb *inp)
{
return (inp->inp_flags2 & INP2_AWDL_UNRESTRICTED) ? TRUE : FALSE;
}
void
inp_clear_awdl_unrestricted(struct inpcb *inp)
{
inp->inp_flags2 &= ~INP2_AWDL_UNRESTRICTED;
ROUTE_RELEASE(&inp->inp_route);
}
#if NECP
void
inp_set_want_app_policy(struct inpcb *inp)
{
inp->inp_flags2 |= INP2_WANT_APP_POLICY;
}
void
inp_clear_want_app_policy(struct inpcb *inp)
{
inp->inp_flags2 &= ~INP2_WANT_APP_POLICY;
}
#endif
u_int32_t
inp_calc_flowhash(struct inpcb *inp)
{
struct inp_flowhash_key fh __attribute__((aligned(8)));
u_int32_t flowhash = 0;
struct inpcb *tmp_inp = NULL;
if (inp_hash_seed == 0)
inp_hash_seed = RandomULong();
bzero(&fh, sizeof (fh));
bcopy(&inp->inp_dependladdr, &fh.infh_laddr, sizeof (fh.infh_laddr));
bcopy(&inp->inp_dependfaddr, &fh.infh_faddr, sizeof (fh.infh_faddr));
fh.infh_lport = inp->inp_lport;
fh.infh_fport = inp->inp_fport;
fh.infh_af = (inp->inp_vflag & INP_IPV6) ? AF_INET6 : AF_INET;
fh.infh_proto = inp->inp_ip_p;
fh.infh_rand1 = RandomULong();
fh.infh_rand2 = RandomULong();
try_again:
flowhash = net_flowhash(&fh, sizeof (fh), inp_hash_seed);
if (flowhash == 0) {
inp_hash_seed = RandomULong();
goto try_again;
}
inp->inp_flowhash = flowhash;
lck_mtx_lock_spin(&inp_fc_lck);
tmp_inp = RB_FIND(inp_fc_tree, &inp_fc_tree, inp);
if (tmp_inp != NULL) {
lck_mtx_unlock(&inp_fc_lck);
inp_hash_seed = RandomULong();
goto try_again;
}
RB_INSERT(inp_fc_tree, &inp_fc_tree, inp);
inp->inp_flags2 |= INP2_IN_FCTREE;
lck_mtx_unlock(&inp_fc_lck);
return (flowhash);
}
void
inp_flowadv(uint32_t flowhash)
{
struct inpcb *inp;
inp = inp_fc_getinp(flowhash, 0);
if (inp == NULL)
return;
inp_fc_feedback(inp);
}
static inline int
infc_cmp(const struct inpcb *inp1, const struct inpcb *inp2)
{
return (memcmp(&(inp1->inp_flowhash), &(inp2->inp_flowhash),
sizeof(inp1->inp_flowhash)));
}
static struct inpcb *
inp_fc_getinp(u_int32_t flowhash, u_int32_t flags)
{
struct inpcb *inp = NULL;
int locked = (flags & INPFC_SOLOCKED) ? 1 : 0;
lck_mtx_lock_spin(&inp_fc_lck);
key_inp.inp_flowhash = flowhash;
inp = RB_FIND(inp_fc_tree, &inp_fc_tree, &key_inp);
if (inp == NULL) {
lck_mtx_unlock(&inp_fc_lck);
return (NULL);
}
if (flags & INPFC_REMOVE) {
RB_REMOVE(inp_fc_tree, &inp_fc_tree, inp);
lck_mtx_unlock(&inp_fc_lck);
bzero(&(inp->infc_link), sizeof (inp->infc_link));
inp->inp_flags2 &= ~INP2_IN_FCTREE;
return (NULL);
}
if (in_pcb_checkstate(inp, WNT_ACQUIRE, locked) == WNT_STOPUSING)
inp = NULL;
lck_mtx_unlock(&inp_fc_lck);
return (inp);
}
static void
inp_fc_feedback(struct inpcb *inp)
{
struct socket *so = inp->inp_socket;
VERIFY(so != NULL);
socket_lock(so, 1);
if (in_pcb_checkstate(inp, WNT_RELEASE, 1) == WNT_STOPUSING) {
socket_unlock(so, 1);
return;
}
if (inp->inp_sndinprog_cnt > 0)
inp->inp_flags |= INP_FC_FEEDBACK;
if (!INP_WAIT_FOR_IF_FEEDBACK(inp)) {
socket_unlock(so, 1);
return;
}
inp_reset_fc_state(inp);
if (SOCK_TYPE(so) == SOCK_STREAM)
inp_fc_unthrottle_tcp(inp);
socket_unlock(so, 1);
}
void
inp_reset_fc_state(struct inpcb *inp)
{
struct socket *so = inp->inp_socket;
int suspended = (INP_IS_FLOW_SUSPENDED(inp)) ? 1 : 0;
int needwakeup = (INP_WAIT_FOR_IF_FEEDBACK(inp)) ? 1 : 0;
inp->inp_flags &= ~(INP_FLOW_CONTROLLED | INP_FLOW_SUSPENDED);
if (suspended) {
so->so_flags &= ~(SOF_SUSPENDED);
soevent(so, (SO_FILT_HINT_LOCKED | SO_FILT_HINT_RESUME));
}
if (needwakeup)
sowwakeup(so);
}
int
inp_set_fc_state(struct inpcb *inp, int advcode)
{
struct inpcb *tmp_inp = NULL;
if (inp->inp_flags & INP_FC_FEEDBACK)
return (0);
inp->inp_flags &= ~(INP_FLOW_CONTROLLED | INP_FLOW_SUSPENDED);
if ((tmp_inp = inp_fc_getinp(inp->inp_flowhash,
INPFC_SOLOCKED)) != NULL) {
if (in_pcb_checkstate(tmp_inp, WNT_RELEASE, 1) == WNT_STOPUSING)
return (0);
VERIFY(tmp_inp == inp);
switch (advcode) {
case FADV_FLOW_CONTROLLED:
inp->inp_flags |= INP_FLOW_CONTROLLED;
break;
case FADV_SUSPENDED:
inp->inp_flags |= INP_FLOW_SUSPENDED;
soevent(inp->inp_socket,
(SO_FILT_HINT_LOCKED | SO_FILT_HINT_SUSPEND));
inp->inp_socket->so_flags |= SOF_SUSPENDED;
break;
}
return (1);
}
return (0);
}
int
inp_flush(struct inpcb *inp, int optval)
{
u_int32_t flowhash = inp->inp_flowhash;
struct ifnet *rtifp, *oifp;
if (optval != SO_TC_ALL && !SO_VALID_TC(optval))
return (EINVAL);
if (flowhash == 0)
return (0);
rtifp = ((inp->inp_route.ro_rt != NULL) ?
inp->inp_route.ro_rt->rt_ifp : NULL);
oifp = inp->inp_last_outifp;
if (rtifp != NULL)
if_qflush_sc(rtifp, so_tc2msc(optval), flowhash, NULL, NULL, 0);
if (oifp != NULL && oifp != rtifp)
if_qflush_sc(oifp, so_tc2msc(optval), flowhash, NULL, NULL, 0);
return (0);
}
void
inp_clear_INP_INADDR_ANY(struct socket *so)
{
struct inpcb *inp = NULL;
socket_lock(so, 1);
inp = sotoinpcb(so);
if (inp) {
inp->inp_flags &= ~INP_INADDR_ANY;
}
socket_unlock(so, 1);
}
void
inp_get_soprocinfo(struct inpcb *inp, struct so_procinfo *soprocinfo)
{
struct socket *so = inp->inp_socket;
soprocinfo->spi_pid = so->last_pid;
if (so->last_pid != 0)
uuid_copy(soprocinfo->spi_uuid, so->last_uuid);
if (so->so_flags & SOF_DELEGATED) {
soprocinfo->spi_epid = so->e_pid;
if (so->e_pid != 0)
uuid_copy(soprocinfo->spi_euuid, so->e_uuid);
} else {
soprocinfo->spi_epid = so->last_pid;
}
}
int
inp_findinpcb_procinfo(struct inpcbinfo *pcbinfo, uint32_t flowhash,
struct so_procinfo *soprocinfo)
{
struct inpcb *inp = NULL;
int found = 0;
bzero(soprocinfo, sizeof (struct so_procinfo));
if (!flowhash)
return (-1);
lck_rw_lock_shared(pcbinfo->ipi_lock);
LIST_FOREACH(inp, pcbinfo->ipi_listhead, inp_list) {
if (inp->inp_state != INPCB_STATE_DEAD &&
inp->inp_socket != NULL &&
inp->inp_flowhash == flowhash) {
found = 1;
inp_get_soprocinfo(inp, soprocinfo);
break;
}
}
lck_rw_done(pcbinfo->ipi_lock);
return (found);
}
#if CONFIG_PROC_UUID_POLICY
static void
inp_update_cellular_policy(struct inpcb *inp, boolean_t set)
{
struct socket *so = inp->inp_socket;
int before, after;
VERIFY(so != NULL);
VERIFY(inp->inp_state != INPCB_STATE_DEAD);
before = INP_NO_CELLULAR(inp);
if (set) {
inp_set_nocellular(inp);
} else {
inp_clear_nocellular(inp);
}
after = INP_NO_CELLULAR(inp);
if (net_io_policy_log && (before != after)) {
static const char *ok = "OK";
static const char *nok = "NOACCESS";
uuid_string_t euuid_buf;
pid_t epid;
if (so->so_flags & SOF_DELEGATED) {
uuid_unparse(so->e_uuid, euuid_buf);
epid = so->e_pid;
} else {
uuid_unparse(so->last_uuid, euuid_buf);
epid = so->last_pid;
}
so->so_ifdenied_notifies = 0;
log(LOG_DEBUG, "%s: so 0x%llx [%d,%d] epid %d "
"euuid %s%s %s->%s\n", __func__,
(uint64_t)VM_KERNEL_ADDRPERM(so), SOCK_DOM(so),
SOCK_TYPE(so), epid, euuid_buf,
(so->so_flags & SOF_DELEGATED) ?
" [delegated]" : "",
((before < after) ? ok : nok),
((before < after) ? nok : ok));
}
}
#if NECP
static void
inp_update_necp_want_app_policy(struct inpcb *inp, boolean_t set)
{
struct socket *so = inp->inp_socket;
int before, after;
VERIFY(so != NULL);
VERIFY(inp->inp_state != INPCB_STATE_DEAD);
before = (inp->inp_flags2 & INP2_WANT_APP_POLICY);
if (set) {
inp_set_want_app_policy(inp);
} else {
inp_clear_want_app_policy(inp);
}
after = (inp->inp_flags2 & INP2_WANT_APP_POLICY);
if (net_io_policy_log && (before != after)) {
static const char *wanted = "WANTED";
static const char *unwanted = "UNWANTED";
uuid_string_t euuid_buf;
pid_t epid;
if (so->so_flags & SOF_DELEGATED) {
uuid_unparse(so->e_uuid, euuid_buf);
epid = so->e_pid;
} else {
uuid_unparse(so->last_uuid, euuid_buf);
epid = so->last_pid;
}
log(LOG_DEBUG, "%s: so 0x%llx [%d,%d] epid %d "
"euuid %s%s %s->%s\n", __func__,
(uint64_t)VM_KERNEL_ADDRPERM(so), SOCK_DOM(so),
SOCK_TYPE(so), epid, euuid_buf,
(so->so_flags & SOF_DELEGATED) ?
" [delegated]" : "",
((before < after) ? unwanted : wanted),
((before < after) ? wanted : unwanted));
}
}
#endif
#endif
#if NECP
void
inp_update_necp_policy(struct inpcb *inp, struct sockaddr *override_local_addr, struct sockaddr *override_remote_addr, u_int override_bound_interface)
{
necp_socket_find_policy_match(inp, override_local_addr, override_remote_addr, override_bound_interface);
if (necp_socket_should_rescope(inp) &&
inp->inp_lport == 0 &&
inp->inp_laddr.s_addr == INADDR_ANY &&
IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) {
inp_bindif(inp, necp_socket_get_rescope_if_index(inp), NULL);
}
}
#endif
int
inp_update_policy(struct inpcb *inp)
{
#if CONFIG_PROC_UUID_POLICY
struct socket *so = inp->inp_socket;
uint32_t pflags = 0;
int32_t ogencnt;
int err = 0;
if (!net_io_policy_uuid ||
so == NULL || inp->inp_state == INPCB_STATE_DEAD)
return (0);
if (so->last_pid == 0 && !(so->so_flags & SOF_DELEGATED))
return (0);
ogencnt = so->so_policy_gencnt;
err = proc_uuid_policy_lookup(((so->so_flags & SOF_DELEGATED) ?
so->e_uuid : so->last_uuid), &pflags, &so->so_policy_gencnt);
if (err == ENOENT && ogencnt != 0)
so->so_policy_gencnt = 0;
if ((err == 0 || err == ENOENT) && ogencnt != so->so_policy_gencnt) {
if (err == 0 && (pflags & PROC_UUID_NO_CELLULAR)) {
inp_update_cellular_policy(inp, TRUE);
} else if (!(pflags & PROC_UUID_NO_CELLULAR)) {
inp_update_cellular_policy(inp, FALSE);
}
#if NECP
if (err == 0 && (pflags & PROC_UUID_NECP_APP_POLICY)) {
inp_update_necp_want_app_policy(inp, TRUE);
} else if (!(pflags & PROC_UUID_NECP_APP_POLICY)) {
inp_update_necp_want_app_policy(inp, FALSE);
}
#endif
}
return ((err == ENOENT) ? 0 : err);
#else
#pragma unused(inp)
return (0);
#endif
}
boolean_t
inp_restricted_recv(struct inpcb *inp, struct ifnet *ifp)
{
VERIFY(inp != NULL);
if (!sorestrictrecv)
return (FALSE);
if (ifp == NULL)
return (FALSE);
if (IFNET_IS_CELLULAR(ifp) && INP_NO_CELLULAR(inp))
return (TRUE);
if (IFNET_IS_EXPENSIVE(ifp) && INP_NO_EXPENSIVE(inp))
return (TRUE);
if (IFNET_IS_AWDL_RESTRICTED(ifp) && !INP_AWDL_UNRESTRICTED(inp))
return (TRUE);
if (!(ifp->if_eflags & IFEF_RESTRICTED_RECV))
return (FALSE);
if (inp->inp_flags & INP_RECV_ANYIF)
return (FALSE);
if ((inp->inp_flags & INP_BOUND_IF) && inp->inp_boundifp == ifp)
return (FALSE);
return (TRUE);
}
boolean_t
inp_restricted_send(struct inpcb *inp, struct ifnet *ifp)
{
VERIFY(inp != NULL);
if (!sorestrictsend)
return (FALSE);
if (ifp == NULL)
return (FALSE);
if (IFNET_IS_CELLULAR(ifp) && INP_NO_CELLULAR(inp))
return (TRUE);
if (IFNET_IS_EXPENSIVE(ifp) && INP_NO_EXPENSIVE(inp))
return (TRUE);
if (IFNET_IS_AWDL_RESTRICTED(ifp) && !INP_AWDL_UNRESTRICTED(inp))
return (TRUE);
return (FALSE);
}