2 * Copyright (c) 1982, 1986, 1991, 1993, 1995
3 * The Regents of the University of California.
4 * Copyright (c) 2007-2009 Robert N. M. Watson
5 * Copyright (c) 2010-2011 Juniper Networks, Inc.
8 * Portions of this software were developed by Robert N. M. Watson under
9 * contract to Juniper Networks, Inc.
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 4. Neither the name of the University nor the names of its contributors
20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 * @(#)in_pcb.c 8.4 (Berkeley) 5/24/95
38 #include <sys/cdefs.h>
39 __FBSDID("$FreeBSD$");
42 #include "opt_ipsec.h"
44 #include "opt_inet6.h"
45 #include "opt_ratelimit.h"
46 #include "opt_pcbgroup.h"
49 #include <sys/param.h>
50 #include <sys/systm.h>
52 #include <sys/malloc.h>
54 #include <sys/callout.h>
55 #include <sys/eventhandler.h>
56 #include <sys/domain.h>
57 #include <sys/protosw.h>
58 #include <sys/rmlock.h>
59 #include <sys/socket.h>
60 #include <sys/socketvar.h>
61 #include <sys/sockio.h>
64 #include <sys/refcount.h>
66 #include <sys/kernel.h>
67 #include <sys/sysctl.h>
76 #include <net/if_var.h>
77 #include <net/if_types.h>
78 #include <net/if_llatbl.h>
79 #include <net/route.h>
80 #include <net/rss_config.h>
83 #if defined(INET) || defined(INET6)
84 #include <netinet/in.h>
85 #include <netinet/in_pcb.h>
86 #include <netinet/ip_var.h>
87 #include <netinet/tcp_var.h>
88 #include <netinet/udp.h>
89 #include <netinet/udp_var.h>
92 #include <netinet/in_var.h>
95 #include <netinet/ip6.h>
96 #include <netinet6/in6_pcb.h>
97 #include <netinet6/in6_var.h>
98 #include <netinet6/ip6_var.h>
101 #include <netipsec/ipsec_support.h>
103 #include <security/mac/mac_framework.h>
105 static struct callout ipport_tick_callout;
108 * These configure the range of local port addresses assigned to
109 * "unspecified" outgoing connections/packets/whatever.
111 VNET_DEFINE(int, ipport_lowfirstauto) = IPPORT_RESERVED - 1; /* 1023 */
112 VNET_DEFINE(int, ipport_lowlastauto) = IPPORT_RESERVEDSTART; /* 600 */
113 VNET_DEFINE(int, ipport_firstauto) = IPPORT_EPHEMERALFIRST; /* 10000 */
114 VNET_DEFINE(int, ipport_lastauto) = IPPORT_EPHEMERALLAST; /* 65535 */
115 VNET_DEFINE(int, ipport_hifirstauto) = IPPORT_HIFIRSTAUTO; /* 49152 */
116 VNET_DEFINE(int, ipport_hilastauto) = IPPORT_HILASTAUTO; /* 65535 */
119 * Reserved ports accessible only to root. There are significant
120 * security considerations that must be accounted for when changing these,
121 * but the security benefits can be great. Please be careful.
123 VNET_DEFINE(int, ipport_reservedhigh) = IPPORT_RESERVED - 1; /* 1023 */
124 VNET_DEFINE(int, ipport_reservedlow);
126 /* Variables dealing with random ephemeral port allocation. */
127 VNET_DEFINE(int, ipport_randomized) = 1; /* user controlled via sysctl */
128 VNET_DEFINE(int, ipport_randomcps) = 10; /* user controlled via sysctl */
129 VNET_DEFINE(int, ipport_randomtime) = 45; /* user controlled via sysctl */
130 VNET_DEFINE(int, ipport_stoprandom); /* toggled by ipport_tick */
131 VNET_DEFINE(int, ipport_tcpallocs);
132 static VNET_DEFINE(int, ipport_tcplastcount);
134 #define V_ipport_tcplastcount VNET(ipport_tcplastcount)
136 static void in_pcbremlists(struct inpcb *inp);
138 static struct inpcb *in_pcblookup_hash_locked(struct inpcbinfo *pcbinfo,
139 struct in_addr faddr, u_int fport_arg,
140 struct in_addr laddr, u_int lport_arg,
141 int lookupflags, struct ifnet *ifp);
143 #define RANGECHK(var, min, max) \
144 if ((var) < (min)) { (var) = (min); } \
145 else if ((var) > (max)) { (var) = (max); }
148 sysctl_net_ipport_check(SYSCTL_HANDLER_ARGS)
152 error = sysctl_handle_int(oidp, arg1, arg2, req);
154 RANGECHK(V_ipport_lowfirstauto, 1, IPPORT_RESERVED - 1);
155 RANGECHK(V_ipport_lowlastauto, 1, IPPORT_RESERVED - 1);
156 RANGECHK(V_ipport_firstauto, IPPORT_RESERVED, IPPORT_MAX);
157 RANGECHK(V_ipport_lastauto, IPPORT_RESERVED, IPPORT_MAX);
158 RANGECHK(V_ipport_hifirstauto, IPPORT_RESERVED, IPPORT_MAX);
159 RANGECHK(V_ipport_hilastauto, IPPORT_RESERVED, IPPORT_MAX);
166 static SYSCTL_NODE(_net_inet_ip, IPPROTO_IP, portrange, CTLFLAG_RW, 0,
169 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, lowfirst,
170 CTLFLAG_VNET | CTLTYPE_INT | CTLFLAG_RW,
171 &VNET_NAME(ipport_lowfirstauto), 0, &sysctl_net_ipport_check, "I", "");
172 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, lowlast,
173 CTLFLAG_VNET | CTLTYPE_INT | CTLFLAG_RW,
174 &VNET_NAME(ipport_lowlastauto), 0, &sysctl_net_ipport_check, "I", "");
175 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, first,
176 CTLFLAG_VNET | CTLTYPE_INT | CTLFLAG_RW,
177 &VNET_NAME(ipport_firstauto), 0, &sysctl_net_ipport_check, "I", "");
178 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, last,
179 CTLFLAG_VNET | CTLTYPE_INT | CTLFLAG_RW,
180 &VNET_NAME(ipport_lastauto), 0, &sysctl_net_ipport_check, "I", "");
181 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, hifirst,
182 CTLFLAG_VNET | CTLTYPE_INT | CTLFLAG_RW,
183 &VNET_NAME(ipport_hifirstauto), 0, &sysctl_net_ipport_check, "I", "");
184 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, hilast,
185 CTLFLAG_VNET | CTLTYPE_INT | CTLFLAG_RW,
186 &VNET_NAME(ipport_hilastauto), 0, &sysctl_net_ipport_check, "I", "");
187 SYSCTL_INT(_net_inet_ip_portrange, OID_AUTO, reservedhigh,
188 CTLFLAG_VNET | CTLFLAG_RW | CTLFLAG_SECURE,
189 &VNET_NAME(ipport_reservedhigh), 0, "");
190 SYSCTL_INT(_net_inet_ip_portrange, OID_AUTO, reservedlow,
191 CTLFLAG_RW|CTLFLAG_SECURE, &VNET_NAME(ipport_reservedlow), 0, "");
192 SYSCTL_INT(_net_inet_ip_portrange, OID_AUTO, randomized,
193 CTLFLAG_VNET | CTLFLAG_RW,
194 &VNET_NAME(ipport_randomized), 0, "Enable random port allocation");
195 SYSCTL_INT(_net_inet_ip_portrange, OID_AUTO, randomcps,
196 CTLFLAG_VNET | CTLFLAG_RW,
197 &VNET_NAME(ipport_randomcps), 0, "Maximum number of random port "
198 "allocations before switching to a sequental one");
199 SYSCTL_INT(_net_inet_ip_portrange, OID_AUTO, randomtime,
200 CTLFLAG_VNET | CTLFLAG_RW,
201 &VNET_NAME(ipport_randomtime), 0,
202 "Minimum time to keep sequental port "
203 "allocation before switching to a random one");
207 * in_pcb.c: manage the Protocol Control Blocks.
209 * NOTE: It is assumed that most of these functions will be called with
210 * the pcbinfo lock held, and often, the inpcb lock held, as these utility
211 * functions often modify hash chains or addresses in pcbs.
215 * Initialize an inpcbinfo -- we should be able to reduce the number of
219 in_pcbinfo_init(struct inpcbinfo *pcbinfo, const char *name,
220 struct inpcbhead *listhead, int hash_nelements, int porthash_nelements,
221 char *inpcbzone_name, uma_init inpcbzone_init, uma_fini inpcbzone_fini,
222 uint32_t inpcbzone_flags, u_int hashfields)
225 INP_INFO_LOCK_INIT(pcbinfo, name);
226 INP_HASH_LOCK_INIT(pcbinfo, "pcbinfohash"); /* XXXRW: argument? */
227 INP_LIST_LOCK_INIT(pcbinfo, "pcbinfolist");
229 pcbinfo->ipi_vnet = curvnet;
231 pcbinfo->ipi_listhead = listhead;
232 LIST_INIT(pcbinfo->ipi_listhead);
233 pcbinfo->ipi_count = 0;
234 pcbinfo->ipi_hashbase = hashinit(hash_nelements, M_PCB,
235 &pcbinfo->ipi_hashmask);
236 pcbinfo->ipi_porthashbase = hashinit(porthash_nelements, M_PCB,
237 &pcbinfo->ipi_porthashmask);
239 in_pcbgroup_init(pcbinfo, hashfields, hash_nelements);
241 pcbinfo->ipi_zone = uma_zcreate(inpcbzone_name, sizeof(struct inpcb),
242 NULL, NULL, inpcbzone_init, inpcbzone_fini, UMA_ALIGN_PTR,
244 uma_zone_set_max(pcbinfo->ipi_zone, maxsockets);
245 uma_zone_set_warning(pcbinfo->ipi_zone,
246 "kern.ipc.maxsockets limit reached");
250 * Destroy an inpcbinfo.
253 in_pcbinfo_destroy(struct inpcbinfo *pcbinfo)
256 KASSERT(pcbinfo->ipi_count == 0,
257 ("%s: ipi_count = %u", __func__, pcbinfo->ipi_count));
259 hashdestroy(pcbinfo->ipi_hashbase, M_PCB, pcbinfo->ipi_hashmask);
260 hashdestroy(pcbinfo->ipi_porthashbase, M_PCB,
261 pcbinfo->ipi_porthashmask);
263 in_pcbgroup_destroy(pcbinfo);
265 uma_zdestroy(pcbinfo->ipi_zone);
266 INP_LIST_LOCK_DESTROY(pcbinfo);
267 INP_HASH_LOCK_DESTROY(pcbinfo);
268 INP_INFO_LOCK_DESTROY(pcbinfo);
272 * Allocate a PCB and associate it with the socket.
273 * On success return with the PCB locked.
276 in_pcballoc(struct socket *so, struct inpcbinfo *pcbinfo)
282 if (pcbinfo == &V_tcbinfo) {
283 INP_INFO_RLOCK_ASSERT(pcbinfo);
285 INP_INFO_WLOCK_ASSERT(pcbinfo);
290 inp = uma_zalloc(pcbinfo->ipi_zone, M_NOWAIT);
293 bzero(inp, inp_zero_size);
294 inp->inp_pcbinfo = pcbinfo;
295 inp->inp_socket = so;
296 inp->inp_cred = crhold(so->so_cred);
297 inp->inp_inc.inc_fibnum = so->so_fibnum;
299 error = mac_inpcb_init(inp, M_NOWAIT);
302 mac_inpcb_create(so, inp);
304 #if defined(IPSEC) || defined(IPSEC_SUPPORT)
305 error = ipsec_init_pcbpolicy(inp);
308 mac_inpcb_destroy(inp);
314 if (INP_SOCKAF(so) == AF_INET6) {
315 inp->inp_vflag |= INP_IPV6PROTO;
317 inp->inp_flags |= IN6P_IPV6_V6ONLY;
321 INP_LIST_WLOCK(pcbinfo);
322 LIST_INSERT_HEAD(pcbinfo->ipi_listhead, inp, inp_list);
323 pcbinfo->ipi_count++;
324 so->so_pcb = (caddr_t)inp;
326 if (V_ip6_auto_flowlabel)
327 inp->inp_flags |= IN6P_AUTOFLOWLABEL;
329 inp->inp_gencnt = ++pcbinfo->ipi_gencnt;
330 refcount_init(&inp->inp_refcount, 1); /* Reference from inpcbinfo */
331 INP_LIST_WUNLOCK(pcbinfo);
332 #if defined(IPSEC) || defined(IPSEC_SUPPORT) || defined(MAC)
335 crfree(inp->inp_cred);
336 uma_zfree(pcbinfo->ipi_zone, inp);
344 in_pcbbind(struct inpcb *inp, struct sockaddr *nam, struct ucred *cred)
348 INP_WLOCK_ASSERT(inp);
349 INP_HASH_WLOCK_ASSERT(inp->inp_pcbinfo);
351 if (inp->inp_lport != 0 || inp->inp_laddr.s_addr != INADDR_ANY)
353 anonport = nam == NULL || ((struct sockaddr_in *)nam)->sin_port == 0;
354 error = in_pcbbind_setup(inp, nam, &inp->inp_laddr.s_addr,
355 &inp->inp_lport, cred);
358 if (in_pcbinshash(inp) != 0) {
359 inp->inp_laddr.s_addr = INADDR_ANY;
364 inp->inp_flags |= INP_ANONPORT;
370 * Select a local port (number) to use.
372 #if defined(INET) || defined(INET6)
374 in_pcb_lport(struct inpcb *inp, struct in_addr *laddrp, u_short *lportp,
375 struct ucred *cred, int lookupflags)
377 struct inpcbinfo *pcbinfo;
378 struct inpcb *tmpinp;
379 unsigned short *lastport;
380 int count, dorandom, error;
381 u_short aux, first, last, lport;
383 struct in_addr laddr;
386 pcbinfo = inp->inp_pcbinfo;
389 * Because no actual state changes occur here, a global write lock on
390 * the pcbinfo isn't required.
392 INP_LOCK_ASSERT(inp);
393 INP_HASH_LOCK_ASSERT(pcbinfo);
395 if (inp->inp_flags & INP_HIGHPORT) {
396 first = V_ipport_hifirstauto; /* sysctl */
397 last = V_ipport_hilastauto;
398 lastport = &pcbinfo->ipi_lasthi;
399 } else if (inp->inp_flags & INP_LOWPORT) {
400 error = priv_check_cred(cred, PRIV_NETINET_RESERVEDPORT, 0);
403 first = V_ipport_lowfirstauto; /* 1023 */
404 last = V_ipport_lowlastauto; /* 600 */
405 lastport = &pcbinfo->ipi_lastlow;
407 first = V_ipport_firstauto; /* sysctl */
408 last = V_ipport_lastauto;
409 lastport = &pcbinfo->ipi_lastport;
412 * For UDP(-Lite), use random port allocation as long as the user
413 * allows it. For TCP (and as of yet unknown) connections,
414 * use random port allocation only if the user allows it AND
415 * ipport_tick() allows it.
417 if (V_ipport_randomized &&
418 (!V_ipport_stoprandom || pcbinfo == &V_udbinfo ||
419 pcbinfo == &V_ulitecbinfo))
424 * It makes no sense to do random port allocation if
425 * we have the only port available.
429 /* Make sure to not include UDP(-Lite) packets in the count. */
430 if (pcbinfo != &V_udbinfo || pcbinfo != &V_ulitecbinfo)
431 V_ipport_tcpallocs++;
433 * Instead of having two loops further down counting up or down
434 * make sure that first is always <= last and go with only one
435 * code path implementing all logic.
444 /* Make the compiler happy. */
446 if ((inp->inp_vflag & (INP_IPV4|INP_IPV6)) == INP_IPV4) {
447 KASSERT(laddrp != NULL, ("%s: laddrp NULL for v4 inp %p",
452 tmpinp = NULL; /* Make compiler happy. */
456 *lastport = first + (arc4random() % (last - first));
458 count = last - first;
461 if (count-- < 0) /* completely used? */
462 return (EADDRNOTAVAIL);
464 if (*lastport < first || *lastport > last)
466 lport = htons(*lastport);
469 if ((inp->inp_vflag & INP_IPV6) != 0)
470 tmpinp = in6_pcblookup_local(pcbinfo,
471 &inp->in6p_laddr, lport, lookupflags, cred);
473 #if defined(INET) && defined(INET6)
477 tmpinp = in_pcblookup_local(pcbinfo, laddr,
478 lport, lookupflags, cred);
480 } while (tmpinp != NULL);
483 if ((inp->inp_vflag & (INP_IPV4|INP_IPV6)) == INP_IPV4)
484 laddrp->s_addr = laddr.s_addr;
492 * Return cached socket options.
495 inp_so_options(const struct inpcb *inp)
501 if ((inp->inp_flags2 & INP_REUSEPORT) != 0)
502 so_options |= SO_REUSEPORT;
503 if ((inp->inp_flags2 & INP_REUSEADDR) != 0)
504 so_options |= SO_REUSEADDR;
507 #endif /* INET || INET6 */
510 * Check if a new BINDMULTI socket is allowed to be created.
512 * ni points to the new inp.
513 * oi points to the exisitng inp.
515 * This checks whether the existing inp also has BINDMULTI and
516 * whether the credentials match.
519 in_pcbbind_check_bindmulti(const struct inpcb *ni, const struct inpcb *oi)
521 /* Check permissions match */
522 if ((ni->inp_flags2 & INP_BINDMULTI) &&
523 (ni->inp_cred->cr_uid !=
524 oi->inp_cred->cr_uid))
527 /* Check the existing inp has BINDMULTI set */
528 if ((ni->inp_flags2 & INP_BINDMULTI) &&
529 ((oi->inp_flags2 & INP_BINDMULTI) == 0))
533 * We're okay - either INP_BINDMULTI isn't set on ni, or
534 * it is and it matches the checks.
541 * Set up a bind operation on a PCB, performing port allocation
542 * as required, but do not actually modify the PCB. Callers can
543 * either complete the bind by setting inp_laddr/inp_lport and
544 * calling in_pcbinshash(), or they can just use the resulting
545 * port and address to authorise the sending of a once-off packet.
547 * On error, the values of *laddrp and *lportp are not changed.
550 in_pcbbind_setup(struct inpcb *inp, struct sockaddr *nam, in_addr_t *laddrp,
551 u_short *lportp, struct ucred *cred)
553 struct socket *so = inp->inp_socket;
554 struct sockaddr_in *sin;
555 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
556 struct in_addr laddr;
558 int lookupflags = 0, reuseport = (so->so_options & SO_REUSEPORT);
562 * No state changes, so read locks are sufficient here.
564 INP_LOCK_ASSERT(inp);
565 INP_HASH_LOCK_ASSERT(pcbinfo);
567 if (TAILQ_EMPTY(&V_in_ifaddrhead)) /* XXX broken! */
568 return (EADDRNOTAVAIL);
569 laddr.s_addr = *laddrp;
570 if (nam != NULL && laddr.s_addr != INADDR_ANY)
572 if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) == 0)
573 lookupflags = INPLOOKUP_WILDCARD;
575 if ((error = prison_local_ip4(cred, &laddr)) != 0)
578 sin = (struct sockaddr_in *)nam;
579 if (nam->sa_len != sizeof (*sin))
583 * We should check the family, but old programs
584 * incorrectly fail to initialize it.
586 if (sin->sin_family != AF_INET)
587 return (EAFNOSUPPORT);
589 error = prison_local_ip4(cred, &sin->sin_addr);
592 if (sin->sin_port != *lportp) {
593 /* Don't allow the port to change. */
596 lport = sin->sin_port;
598 /* NB: lport is left as 0 if the port isn't being changed. */
599 if (IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
601 * Treat SO_REUSEADDR as SO_REUSEPORT for multicast;
602 * allow complete duplication of binding if
603 * SO_REUSEPORT is set, or if SO_REUSEADDR is set
604 * and a multicast address is bound on both
605 * new and duplicated sockets.
607 if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) != 0)
608 reuseport = SO_REUSEADDR|SO_REUSEPORT;
609 } else if (sin->sin_addr.s_addr != INADDR_ANY) {
610 sin->sin_port = 0; /* yech... */
611 bzero(&sin->sin_zero, sizeof(sin->sin_zero));
613 * Is the address a local IP address?
614 * If INP_BINDANY is set, then the socket may be bound
615 * to any endpoint address, local or not.
617 if ((inp->inp_flags & INP_BINDANY) == 0 &&
618 ifa_ifwithaddr_check((struct sockaddr *)sin) == 0)
619 return (EADDRNOTAVAIL);
621 laddr = sin->sin_addr;
627 if (ntohs(lport) <= V_ipport_reservedhigh &&
628 ntohs(lport) >= V_ipport_reservedlow &&
629 priv_check_cred(cred, PRIV_NETINET_RESERVEDPORT,
632 if (!IN_MULTICAST(ntohl(sin->sin_addr.s_addr)) &&
633 priv_check_cred(inp->inp_cred,
634 PRIV_NETINET_REUSEPORT, 0) != 0) {
635 t = in_pcblookup_local(pcbinfo, sin->sin_addr,
636 lport, INPLOOKUP_WILDCARD, cred);
639 * This entire block sorely needs a rewrite.
642 ((inp->inp_flags2 & INP_BINDMULTI) == 0) &&
643 ((t->inp_flags & INP_TIMEWAIT) == 0) &&
644 (so->so_type != SOCK_STREAM ||
645 ntohl(t->inp_faddr.s_addr) == INADDR_ANY) &&
646 (ntohl(sin->sin_addr.s_addr) != INADDR_ANY ||
647 ntohl(t->inp_laddr.s_addr) != INADDR_ANY ||
648 (t->inp_flags2 & INP_REUSEPORT) == 0) &&
649 (inp->inp_cred->cr_uid !=
650 t->inp_cred->cr_uid))
654 * If the socket is a BINDMULTI socket, then
655 * the credentials need to match and the
656 * original socket also has to have been bound
659 if (t && (! in_pcbbind_check_bindmulti(inp, t)))
662 t = in_pcblookup_local(pcbinfo, sin->sin_addr,
663 lport, lookupflags, cred);
664 if (t && (t->inp_flags & INP_TIMEWAIT)) {
666 * XXXRW: If an incpb has had its timewait
667 * state recycled, we treat the address as
668 * being in use (for now). This is better
669 * than a panic, but not desirable.
673 (reuseport & tw->tw_so_options) == 0)
676 ((inp->inp_flags2 & INP_BINDMULTI) == 0) &&
677 (reuseport & inp_so_options(t)) == 0) {
679 if (ntohl(sin->sin_addr.s_addr) !=
681 ntohl(t->inp_laddr.s_addr) !=
683 (inp->inp_vflag & INP_IPV6PROTO) == 0 ||
684 (t->inp_vflag & INP_IPV6PROTO) == 0)
687 if (t && (! in_pcbbind_check_bindmulti(inp, t)))
695 error = in_pcb_lport(inp, &laddr, &lport, cred, lookupflags);
700 *laddrp = laddr.s_addr;
706 * Connect from a socket to a specified address.
707 * Both address and port must be specified in argument sin.
708 * If don't have a local address for this socket yet,
712 in_pcbconnect_mbuf(struct inpcb *inp, struct sockaddr *nam,
713 struct ucred *cred, struct mbuf *m)
715 u_short lport, fport;
716 in_addr_t laddr, faddr;
719 INP_WLOCK_ASSERT(inp);
720 INP_HASH_WLOCK_ASSERT(inp->inp_pcbinfo);
722 lport = inp->inp_lport;
723 laddr = inp->inp_laddr.s_addr;
724 anonport = (lport == 0);
725 error = in_pcbconnect_setup(inp, nam, &laddr, &lport, &faddr, &fport,
730 /* Do the initial binding of the local address if required. */
731 if (inp->inp_laddr.s_addr == INADDR_ANY && inp->inp_lport == 0) {
732 inp->inp_lport = lport;
733 inp->inp_laddr.s_addr = laddr;
734 if (in_pcbinshash(inp) != 0) {
735 inp->inp_laddr.s_addr = INADDR_ANY;
741 /* Commit the remaining changes. */
742 inp->inp_lport = lport;
743 inp->inp_laddr.s_addr = laddr;
744 inp->inp_faddr.s_addr = faddr;
745 inp->inp_fport = fport;
746 in_pcbrehash_mbuf(inp, m);
749 inp->inp_flags |= INP_ANONPORT;
754 in_pcbconnect(struct inpcb *inp, struct sockaddr *nam, struct ucred *cred)
757 return (in_pcbconnect_mbuf(inp, nam, cred, NULL));
761 * Do proper source address selection on an unbound socket in case
762 * of connect. Take jails into account as well.
765 in_pcbladdr(struct inpcb *inp, struct in_addr *faddr, struct in_addr *laddr,
770 struct sockaddr_in *sin;
774 KASSERT(laddr != NULL, ("%s: laddr NULL", __func__));
777 * Bypass source address selection and use the primary jail IP
780 if (cred != NULL && !prison_saddrsel_ip4(cred, laddr))
784 bzero(&sro, sizeof(sro));
786 sin = (struct sockaddr_in *)&sro.ro_dst;
787 sin->sin_family = AF_INET;
788 sin->sin_len = sizeof(struct sockaddr_in);
789 sin->sin_addr.s_addr = faddr->s_addr;
792 * If route is known our src addr is taken from the i/f,
795 * Find out route to destination.
797 if ((inp->inp_socket->so_options & SO_DONTROUTE) == 0)
798 in_rtalloc_ign(&sro, 0, inp->inp_inc.inc_fibnum);
801 * If we found a route, use the address corresponding to
802 * the outgoing interface.
804 * Otherwise assume faddr is reachable on a directly connected
805 * network and try to find a corresponding interface to take
806 * the source address from.
808 if (sro.ro_rt == NULL || sro.ro_rt->rt_ifp == NULL) {
809 struct in_ifaddr *ia;
812 ia = ifatoia(ifa_ifwithdstaddr((struct sockaddr *)sin,
813 inp->inp_socket->so_fibnum));
815 ia = ifatoia(ifa_ifwithnet((struct sockaddr *)sin, 0,
816 inp->inp_socket->so_fibnum));
822 if (cred == NULL || !prison_flag(cred, PR_IP4)) {
823 laddr->s_addr = ia->ia_addr.sin_addr.s_addr;
824 ifa_free(&ia->ia_ifa);
829 ifa_free(&ia->ia_ifa);
832 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
835 if (sa->sa_family != AF_INET)
837 sin = (struct sockaddr_in *)sa;
838 if (prison_check_ip4(cred, &sin->sin_addr) == 0) {
839 ia = (struct in_ifaddr *)ifa;
844 laddr->s_addr = ia->ia_addr.sin_addr.s_addr;
845 IF_ADDR_RUNLOCK(ifp);
848 IF_ADDR_RUNLOCK(ifp);
850 /* 3. As a last resort return the 'default' jail address. */
851 error = prison_get_ip4(cred, laddr);
856 * If the outgoing interface on the route found is not
857 * a loopback interface, use the address from that interface.
858 * In case of jails do those three steps:
859 * 1. check if the interface address belongs to the jail. If so use it.
860 * 2. check if we have any address on the outgoing interface
861 * belonging to this jail. If so use it.
862 * 3. as a last resort return the 'default' jail address.
864 if ((sro.ro_rt->rt_ifp->if_flags & IFF_LOOPBACK) == 0) {
865 struct in_ifaddr *ia;
868 /* If not jailed, use the default returned. */
869 if (cred == NULL || !prison_flag(cred, PR_IP4)) {
870 ia = (struct in_ifaddr *)sro.ro_rt->rt_ifa;
871 laddr->s_addr = ia->ia_addr.sin_addr.s_addr;
876 /* 1. Check if the iface address belongs to the jail. */
877 sin = (struct sockaddr_in *)sro.ro_rt->rt_ifa->ifa_addr;
878 if (prison_check_ip4(cred, &sin->sin_addr) == 0) {
879 ia = (struct in_ifaddr *)sro.ro_rt->rt_ifa;
880 laddr->s_addr = ia->ia_addr.sin_addr.s_addr;
885 * 2. Check if we have any address on the outgoing interface
886 * belonging to this jail.
889 ifp = sro.ro_rt->rt_ifp;
891 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
893 if (sa->sa_family != AF_INET)
895 sin = (struct sockaddr_in *)sa;
896 if (prison_check_ip4(cred, &sin->sin_addr) == 0) {
897 ia = (struct in_ifaddr *)ifa;
902 laddr->s_addr = ia->ia_addr.sin_addr.s_addr;
903 IF_ADDR_RUNLOCK(ifp);
906 IF_ADDR_RUNLOCK(ifp);
908 /* 3. As a last resort return the 'default' jail address. */
909 error = prison_get_ip4(cred, laddr);
914 * The outgoing interface is marked with 'loopback net', so a route
915 * to ourselves is here.
916 * Try to find the interface of the destination address and then
917 * take the address from there. That interface is not necessarily
918 * a loopback interface.
919 * In case of jails, check that it is an address of the jail
920 * and if we cannot find, fall back to the 'default' jail address.
922 if ((sro.ro_rt->rt_ifp->if_flags & IFF_LOOPBACK) != 0) {
923 struct sockaddr_in sain;
924 struct in_ifaddr *ia;
926 bzero(&sain, sizeof(struct sockaddr_in));
927 sain.sin_family = AF_INET;
928 sain.sin_len = sizeof(struct sockaddr_in);
929 sain.sin_addr.s_addr = faddr->s_addr;
931 ia = ifatoia(ifa_ifwithdstaddr(sintosa(&sain),
932 inp->inp_socket->so_fibnum));
934 ia = ifatoia(ifa_ifwithnet(sintosa(&sain), 0,
935 inp->inp_socket->so_fibnum));
937 ia = ifatoia(ifa_ifwithaddr(sintosa(&sain)));
939 if (cred == NULL || !prison_flag(cred, PR_IP4)) {
944 laddr->s_addr = ia->ia_addr.sin_addr.s_addr;
945 ifa_free(&ia->ia_ifa);
954 ifa_free(&ia->ia_ifa);
957 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
960 if (sa->sa_family != AF_INET)
962 sin = (struct sockaddr_in *)sa;
963 if (prison_check_ip4(cred,
964 &sin->sin_addr) == 0) {
965 ia = (struct in_ifaddr *)ifa;
970 laddr->s_addr = ia->ia_addr.sin_addr.s_addr;
971 IF_ADDR_RUNLOCK(ifp);
974 IF_ADDR_RUNLOCK(ifp);
977 /* 3. As a last resort return the 'default' jail address. */
978 error = prison_get_ip4(cred, laddr);
983 if (sro.ro_rt != NULL)
989 * Set up for a connect from a socket to the specified address.
990 * On entry, *laddrp and *lportp should contain the current local
991 * address and port for the PCB; these are updated to the values
992 * that should be placed in inp_laddr and inp_lport to complete
995 * On success, *faddrp and *fportp will be set to the remote address
996 * and port. These are not updated in the error case.
998 * If the operation fails because the connection already exists,
999 * *oinpp will be set to the PCB of that connection so that the
1000 * caller can decide to override it. In all other cases, *oinpp
1004 in_pcbconnect_setup(struct inpcb *inp, struct sockaddr *nam,
1005 in_addr_t *laddrp, u_short *lportp, in_addr_t *faddrp, u_short *fportp,
1006 struct inpcb **oinpp, struct ucred *cred)
1008 struct rm_priotracker in_ifa_tracker;
1009 struct sockaddr_in *sin = (struct sockaddr_in *)nam;
1010 struct in_ifaddr *ia;
1012 struct in_addr laddr, faddr;
1013 u_short lport, fport;
1017 * Because a global state change doesn't actually occur here, a read
1018 * lock is sufficient.
1020 INP_LOCK_ASSERT(inp);
1021 INP_HASH_LOCK_ASSERT(inp->inp_pcbinfo);
1025 if (nam->sa_len != sizeof (*sin))
1027 if (sin->sin_family != AF_INET)
1028 return (EAFNOSUPPORT);
1029 if (sin->sin_port == 0)
1030 return (EADDRNOTAVAIL);
1031 laddr.s_addr = *laddrp;
1033 faddr = sin->sin_addr;
1034 fport = sin->sin_port;
1036 if (!TAILQ_EMPTY(&V_in_ifaddrhead)) {
1038 * If the destination address is INADDR_ANY,
1039 * use the primary local address.
1040 * If the supplied address is INADDR_BROADCAST,
1041 * and the primary interface supports broadcast,
1042 * choose the broadcast address for that interface.
1044 if (faddr.s_addr == INADDR_ANY) {
1045 IN_IFADDR_RLOCK(&in_ifa_tracker);
1047 IA_SIN(TAILQ_FIRST(&V_in_ifaddrhead))->sin_addr;
1048 IN_IFADDR_RUNLOCK(&in_ifa_tracker);
1050 (error = prison_get_ip4(cred, &faddr)) != 0)
1052 } else if (faddr.s_addr == (u_long)INADDR_BROADCAST) {
1053 IN_IFADDR_RLOCK(&in_ifa_tracker);
1054 if (TAILQ_FIRST(&V_in_ifaddrhead)->ia_ifp->if_flags &
1056 faddr = satosin(&TAILQ_FIRST(
1057 &V_in_ifaddrhead)->ia_broadaddr)->sin_addr;
1058 IN_IFADDR_RUNLOCK(&in_ifa_tracker);
1061 if (laddr.s_addr == INADDR_ANY) {
1062 error = in_pcbladdr(inp, &faddr, &laddr, cred);
1064 * If the destination address is multicast and an outgoing
1065 * interface has been set as a multicast option, prefer the
1066 * address of that interface as our source address.
1068 if (IN_MULTICAST(ntohl(faddr.s_addr)) &&
1069 inp->inp_moptions != NULL) {
1070 struct ip_moptions *imo;
1073 imo = inp->inp_moptions;
1074 if (imo->imo_multicast_ifp != NULL) {
1075 ifp = imo->imo_multicast_ifp;
1076 IN_IFADDR_RLOCK(&in_ifa_tracker);
1077 TAILQ_FOREACH(ia, &V_in_ifaddrhead, ia_link) {
1078 if ((ia->ia_ifp == ifp) &&
1080 prison_check_ip4(cred,
1081 &ia->ia_addr.sin_addr) == 0))
1085 error = EADDRNOTAVAIL;
1087 laddr = ia->ia_addr.sin_addr;
1090 IN_IFADDR_RUNLOCK(&in_ifa_tracker);
1096 oinp = in_pcblookup_hash_locked(inp->inp_pcbinfo, faddr, fport,
1097 laddr, lport, 0, NULL);
1101 return (EADDRINUSE);
1104 error = in_pcbbind_setup(inp, NULL, &laddr.s_addr, &lport,
1109 *laddrp = laddr.s_addr;
1111 *faddrp = faddr.s_addr;
1117 in_pcbdisconnect(struct inpcb *inp)
1120 INP_WLOCK_ASSERT(inp);
1121 INP_HASH_WLOCK_ASSERT(inp->inp_pcbinfo);
1123 inp->inp_faddr.s_addr = INADDR_ANY;
1130 * in_pcbdetach() is responsibe for disassociating a socket from an inpcb.
1131 * For most protocols, this will be invoked immediately prior to calling
1132 * in_pcbfree(). However, with TCP the inpcb may significantly outlive the
1133 * socket, in which case in_pcbfree() is deferred.
1136 in_pcbdetach(struct inpcb *inp)
1139 KASSERT(inp->inp_socket != NULL, ("%s: inp_socket == NULL", __func__));
1142 if (inp->inp_snd_tag != NULL)
1143 in_pcbdetach_txrtlmt(inp);
1145 inp->inp_socket->so_pcb = NULL;
1146 inp->inp_socket = NULL;
1150 * in_pcbref() bumps the reference count on an inpcb in order to maintain
1151 * stability of an inpcb pointer despite the inpcb lock being released. This
1152 * is used in TCP when the inpcbinfo lock needs to be acquired or upgraded,
1153 * but where the inpcb lock may already held, or when acquiring a reference
1156 * in_pcbref() should be used only to provide brief memory stability, and
1157 * must always be followed by a call to INP_WLOCK() and in_pcbrele() to
1158 * garbage collect the inpcb if it has been in_pcbfree()'d from another
1159 * context. Until in_pcbrele() has returned that the inpcb is still valid,
1160 * lock and rele are the *only* safe operations that may be performed on the
1163 * While the inpcb will not be freed, releasing the inpcb lock means that the
1164 * connection's state may change, so the caller should be careful to
1165 * revalidate any cached state on reacquiring the lock. Drop the reference
1166 * using in_pcbrele().
1169 in_pcbref(struct inpcb *inp)
1172 KASSERT(inp->inp_refcount > 0, ("%s: refcount 0", __func__));
1174 refcount_acquire(&inp->inp_refcount);
1178 * Drop a refcount on an inpcb elevated using in_pcbref(); because a call to
1179 * in_pcbfree() may have been made between in_pcbref() and in_pcbrele(), we
1180 * return a flag indicating whether or not the inpcb remains valid. If it is
1181 * valid, we return with the inpcb lock held.
1183 * Notice that, unlike in_pcbref(), the inpcb lock must be held to drop a
1184 * reference on an inpcb. Historically more work was done here (actually, in
1185 * in_pcbfree_internal()) but has been moved to in_pcbfree() to avoid the
1186 * need for the pcbinfo lock in in_pcbrele(). Deferring the free is entirely
1187 * about memory stability (and continued use of the write lock).
1190 in_pcbrele_rlocked(struct inpcb *inp)
1192 struct inpcbinfo *pcbinfo;
1194 KASSERT(inp->inp_refcount > 0, ("%s: refcount 0", __func__));
1196 INP_RLOCK_ASSERT(inp);
1198 if (refcount_release(&inp->inp_refcount) == 0) {
1200 * If the inpcb has been freed, let the caller know, even if
1201 * this isn't the last reference.
1203 if (inp->inp_flags2 & INP_FREED) {
1210 KASSERT(inp->inp_socket == NULL, ("%s: inp_socket != NULL", __func__));
1213 pcbinfo = inp->inp_pcbinfo;
1214 uma_zfree(pcbinfo->ipi_zone, inp);
1219 in_pcbrele_wlocked(struct inpcb *inp)
1221 struct inpcbinfo *pcbinfo;
1223 KASSERT(inp->inp_refcount > 0, ("%s: refcount 0", __func__));
1225 INP_WLOCK_ASSERT(inp);
1227 if (refcount_release(&inp->inp_refcount) == 0) {
1229 * If the inpcb has been freed, let the caller know, even if
1230 * this isn't the last reference.
1232 if (inp->inp_flags2 & INP_FREED) {
1239 KASSERT(inp->inp_socket == NULL, ("%s: inp_socket != NULL", __func__));
1242 pcbinfo = inp->inp_pcbinfo;
1243 uma_zfree(pcbinfo->ipi_zone, inp);
1248 * Temporary wrapper.
1251 in_pcbrele(struct inpcb *inp)
1254 return (in_pcbrele_wlocked(inp));
1258 * Unconditionally schedule an inpcb to be freed by decrementing its
1259 * reference count, which should occur only after the inpcb has been detached
1260 * from its socket. If another thread holds a temporary reference (acquired
1261 * using in_pcbref()) then the free is deferred until that reference is
1262 * released using in_pcbrele(), but the inpcb is still unlocked. Almost all
1263 * work, including removal from global lists, is done in this context, where
1264 * the pcbinfo lock is held.
1267 in_pcbfree(struct inpcb *inp)
1269 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
1271 KASSERT(inp->inp_socket == NULL, ("%s: inp_socket != NULL", __func__));
1274 if (pcbinfo == &V_tcbinfo) {
1275 INP_INFO_LOCK_ASSERT(pcbinfo);
1277 INP_INFO_WLOCK_ASSERT(pcbinfo);
1280 INP_WLOCK_ASSERT(inp);
1282 /* XXXRW: Do as much as possible here. */
1283 #if defined(IPSEC) || defined(IPSEC_SUPPORT)
1284 if (inp->inp_sp != NULL)
1285 ipsec_delete_pcbpolicy(inp);
1287 INP_LIST_WLOCK(pcbinfo);
1288 inp->inp_gencnt = ++pcbinfo->ipi_gencnt;
1289 in_pcbremlists(inp);
1290 INP_LIST_WUNLOCK(pcbinfo);
1292 if (inp->inp_vflag & INP_IPV6PROTO) {
1293 ip6_freepcbopts(inp->in6p_outputopts);
1294 if (inp->in6p_moptions != NULL)
1295 ip6_freemoptions(inp->in6p_moptions);
1298 if (inp->inp_options)
1299 (void)m_free(inp->inp_options);
1301 if (inp->inp_moptions != NULL)
1302 inp_freemoptions(inp->inp_moptions);
1304 RO_RTFREE(&inp->inp_route);
1305 if (inp->inp_route.ro_lle)
1306 LLE_FREE(inp->inp_route.ro_lle); /* zeros ro_lle */
1309 inp->inp_flags2 |= INP_FREED;
1310 crfree(inp->inp_cred);
1312 mac_inpcb_destroy(inp);
1314 if (!in_pcbrele_wlocked(inp))
1319 * in_pcbdrop() removes an inpcb from hashed lists, releasing its address and
1320 * port reservation, and preventing it from being returned by inpcb lookups.
1322 * It is used by TCP to mark an inpcb as unused and avoid future packet
1323 * delivery or event notification when a socket remains open but TCP has
1324 * closed. This might occur as a result of a shutdown()-initiated TCP close
1325 * or a RST on the wire, and allows the port binding to be reused while still
1326 * maintaining the invariant that so_pcb always points to a valid inpcb until
1329 * XXXRW: Possibly in_pcbdrop() should also prevent future notifications by
1330 * in_pcbnotifyall() and in_pcbpurgeif0()?
1333 in_pcbdrop(struct inpcb *inp)
1336 INP_WLOCK_ASSERT(inp);
1339 * XXXRW: Possibly we should protect the setting of INP_DROPPED with
1342 inp->inp_flags |= INP_DROPPED;
1343 if (inp->inp_flags & INP_INHASHLIST) {
1344 struct inpcbport *phd = inp->inp_phd;
1346 INP_HASH_WLOCK(inp->inp_pcbinfo);
1347 LIST_REMOVE(inp, inp_hash);
1348 LIST_REMOVE(inp, inp_portlist);
1349 if (LIST_FIRST(&phd->phd_pcblist) == NULL) {
1350 LIST_REMOVE(phd, phd_hash);
1353 INP_HASH_WUNLOCK(inp->inp_pcbinfo);
1354 inp->inp_flags &= ~INP_INHASHLIST;
1356 in_pcbgroup_remove(inp);
1363 * Common routines to return the socket addresses associated with inpcbs.
1366 in_sockaddr(in_port_t port, struct in_addr *addr_p)
1368 struct sockaddr_in *sin;
1370 sin = malloc(sizeof *sin, M_SONAME,
1372 sin->sin_family = AF_INET;
1373 sin->sin_len = sizeof(*sin);
1374 sin->sin_addr = *addr_p;
1375 sin->sin_port = port;
1377 return (struct sockaddr *)sin;
1381 in_getsockaddr(struct socket *so, struct sockaddr **nam)
1384 struct in_addr addr;
1387 inp = sotoinpcb(so);
1388 KASSERT(inp != NULL, ("in_getsockaddr: inp == NULL"));
1391 port = inp->inp_lport;
1392 addr = inp->inp_laddr;
1395 *nam = in_sockaddr(port, &addr);
1400 in_getpeeraddr(struct socket *so, struct sockaddr **nam)
1403 struct in_addr addr;
1406 inp = sotoinpcb(so);
1407 KASSERT(inp != NULL, ("in_getpeeraddr: inp == NULL"));
1410 port = inp->inp_fport;
1411 addr = inp->inp_faddr;
1414 *nam = in_sockaddr(port, &addr);
1419 in_pcbnotifyall(struct inpcbinfo *pcbinfo, struct in_addr faddr, int errno,
1420 struct inpcb *(*notify)(struct inpcb *, int))
1422 struct inpcb *inp, *inp_temp;
1424 INP_INFO_WLOCK(pcbinfo);
1425 LIST_FOREACH_SAFE(inp, pcbinfo->ipi_listhead, inp_list, inp_temp) {
1428 if ((inp->inp_vflag & INP_IPV4) == 0) {
1433 if (inp->inp_faddr.s_addr != faddr.s_addr ||
1434 inp->inp_socket == NULL) {
1438 if ((*notify)(inp, errno))
1441 INP_INFO_WUNLOCK(pcbinfo);
1445 in_pcbpurgeif0(struct inpcbinfo *pcbinfo, struct ifnet *ifp)
1448 struct ip_moptions *imo;
1451 INP_INFO_WLOCK(pcbinfo);
1452 LIST_FOREACH(inp, pcbinfo->ipi_listhead, inp_list) {
1454 imo = inp->inp_moptions;
1455 if ((inp->inp_vflag & INP_IPV4) &&
1458 * Unselect the outgoing interface if it is being
1461 if (imo->imo_multicast_ifp == ifp)
1462 imo->imo_multicast_ifp = NULL;
1465 * Drop multicast group membership if we joined
1466 * through the interface being detached.
1468 for (i = 0, gap = 0; i < imo->imo_num_memberships;
1470 if (imo->imo_membership[i]->inm_ifp == ifp) {
1471 in_delmulti(imo->imo_membership[i]);
1473 } else if (gap != 0)
1474 imo->imo_membership[i - gap] =
1475 imo->imo_membership[i];
1477 imo->imo_num_memberships -= gap;
1481 INP_INFO_WUNLOCK(pcbinfo);
1485 * Lookup a PCB based on the local address and port. Caller must hold the
1486 * hash lock. No inpcb locks or references are acquired.
1488 #define INP_LOOKUP_MAPPED_PCB_COST 3
1490 in_pcblookup_local(struct inpcbinfo *pcbinfo, struct in_addr laddr,
1491 u_short lport, int lookupflags, struct ucred *cred)
1495 int matchwild = 3 + INP_LOOKUP_MAPPED_PCB_COST;
1501 KASSERT((lookupflags & ~(INPLOOKUP_WILDCARD)) == 0,
1502 ("%s: invalid lookup flags %d", __func__, lookupflags));
1504 INP_HASH_LOCK_ASSERT(pcbinfo);
1506 if ((lookupflags & INPLOOKUP_WILDCARD) == 0) {
1507 struct inpcbhead *head;
1509 * Look for an unconnected (wildcard foreign addr) PCB that
1510 * matches the local address and port we're looking for.
1512 head = &pcbinfo->ipi_hashbase[INP_PCBHASH(INADDR_ANY, lport,
1513 0, pcbinfo->ipi_hashmask)];
1514 LIST_FOREACH(inp, head, inp_hash) {
1516 /* XXX inp locking */
1517 if ((inp->inp_vflag & INP_IPV4) == 0)
1520 if (inp->inp_faddr.s_addr == INADDR_ANY &&
1521 inp->inp_laddr.s_addr == laddr.s_addr &&
1522 inp->inp_lport == lport) {
1527 prison_equal_ip4(cred->cr_prison,
1528 inp->inp_cred->cr_prison))
1537 struct inpcbporthead *porthash;
1538 struct inpcbport *phd;
1539 struct inpcb *match = NULL;
1541 * Best fit PCB lookup.
1543 * First see if this local port is in use by looking on the
1546 porthash = &pcbinfo->ipi_porthashbase[INP_PCBPORTHASH(lport,
1547 pcbinfo->ipi_porthashmask)];
1548 LIST_FOREACH(phd, porthash, phd_hash) {
1549 if (phd->phd_port == lport)
1554 * Port is in use by one or more PCBs. Look for best
1557 LIST_FOREACH(inp, &phd->phd_pcblist, inp_portlist) {
1560 !prison_equal_ip4(inp->inp_cred->cr_prison,
1564 /* XXX inp locking */
1565 if ((inp->inp_vflag & INP_IPV4) == 0)
1568 * We never select the PCB that has
1569 * INP_IPV6 flag and is bound to :: if
1570 * we have another PCB which is bound
1571 * to 0.0.0.0. If a PCB has the
1572 * INP_IPV6 flag, then we set its cost
1573 * higher than IPv4 only PCBs.
1575 * Note that the case only happens
1576 * when a socket is bound to ::, under
1577 * the condition that the use of the
1578 * mapped address is allowed.
1580 if ((inp->inp_vflag & INP_IPV6) != 0)
1581 wildcard += INP_LOOKUP_MAPPED_PCB_COST;
1583 if (inp->inp_faddr.s_addr != INADDR_ANY)
1585 if (inp->inp_laddr.s_addr != INADDR_ANY) {
1586 if (laddr.s_addr == INADDR_ANY)
1588 else if (inp->inp_laddr.s_addr != laddr.s_addr)
1591 if (laddr.s_addr != INADDR_ANY)
1594 if (wildcard < matchwild) {
1596 matchwild = wildcard;
1605 #undef INP_LOOKUP_MAPPED_PCB_COST
1609 * Lookup PCB in hash list, using pcbgroup tables.
1611 static struct inpcb *
1612 in_pcblookup_group(struct inpcbinfo *pcbinfo, struct inpcbgroup *pcbgroup,
1613 struct in_addr faddr, u_int fport_arg, struct in_addr laddr,
1614 u_int lport_arg, int lookupflags, struct ifnet *ifp)
1616 struct inpcbhead *head;
1617 struct inpcb *inp, *tmpinp;
1618 u_short fport = fport_arg, lport = lport_arg;
1621 * First look for an exact match.
1624 INP_GROUP_LOCK(pcbgroup);
1625 head = &pcbgroup->ipg_hashbase[INP_PCBHASH(faddr.s_addr, lport, fport,
1626 pcbgroup->ipg_hashmask)];
1627 LIST_FOREACH(inp, head, inp_pcbgrouphash) {
1629 /* XXX inp locking */
1630 if ((inp->inp_vflag & INP_IPV4) == 0)
1633 if (inp->inp_faddr.s_addr == faddr.s_addr &&
1634 inp->inp_laddr.s_addr == laddr.s_addr &&
1635 inp->inp_fport == fport &&
1636 inp->inp_lport == lport) {
1638 * XXX We should be able to directly return
1639 * the inp here, without any checks.
1640 * Well unless both bound with SO_REUSEPORT?
1642 if (prison_flag(inp->inp_cred, PR_IP4))
1648 if (tmpinp != NULL) {
1655 * For incoming connections, we may wish to do a wildcard
1656 * match for an RSS-local socket.
1658 if ((lookupflags & INPLOOKUP_WILDCARD) != 0) {
1659 struct inpcb *local_wild = NULL, *local_exact = NULL;
1661 struct inpcb *local_wild_mapped = NULL;
1663 struct inpcb *jail_wild = NULL;
1664 struct inpcbhead *head;
1668 * Order of socket selection - we always prefer jails.
1669 * 1. jailed, non-wild.
1671 * 3. non-jailed, non-wild.
1672 * 4. non-jailed, wild.
1675 head = &pcbgroup->ipg_hashbase[INP_PCBHASH(INADDR_ANY,
1676 lport, 0, pcbgroup->ipg_hashmask)];
1677 LIST_FOREACH(inp, head, inp_pcbgrouphash) {
1679 /* XXX inp locking */
1680 if ((inp->inp_vflag & INP_IPV4) == 0)
1683 if (inp->inp_faddr.s_addr != INADDR_ANY ||
1684 inp->inp_lport != lport)
1687 injail = prison_flag(inp->inp_cred, PR_IP4);
1689 if (prison_check_ip4(inp->inp_cred,
1693 if (local_exact != NULL)
1697 if (inp->inp_laddr.s_addr == laddr.s_addr) {
1702 } else if (inp->inp_laddr.s_addr == INADDR_ANY) {
1704 /* XXX inp locking, NULL check */
1705 if (inp->inp_vflag & INP_IPV6PROTO)
1706 local_wild_mapped = inp;
1714 } /* LIST_FOREACH */
1723 inp = local_wild_mapped;
1731 * Then look for a wildcard match, if requested.
1733 if ((lookupflags & INPLOOKUP_WILDCARD) != 0) {
1734 struct inpcb *local_wild = NULL, *local_exact = NULL;
1736 struct inpcb *local_wild_mapped = NULL;
1738 struct inpcb *jail_wild = NULL;
1739 struct inpcbhead *head;
1743 * Order of socket selection - we always prefer jails.
1744 * 1. jailed, non-wild.
1746 * 3. non-jailed, non-wild.
1747 * 4. non-jailed, wild.
1749 head = &pcbinfo->ipi_wildbase[INP_PCBHASH(INADDR_ANY, lport,
1750 0, pcbinfo->ipi_wildmask)];
1751 LIST_FOREACH(inp, head, inp_pcbgroup_wild) {
1753 /* XXX inp locking */
1754 if ((inp->inp_vflag & INP_IPV4) == 0)
1757 if (inp->inp_faddr.s_addr != INADDR_ANY ||
1758 inp->inp_lport != lport)
1761 injail = prison_flag(inp->inp_cred, PR_IP4);
1763 if (prison_check_ip4(inp->inp_cred,
1767 if (local_exact != NULL)
1771 if (inp->inp_laddr.s_addr == laddr.s_addr) {
1776 } else if (inp->inp_laddr.s_addr == INADDR_ANY) {
1778 /* XXX inp locking, NULL check */
1779 if (inp->inp_vflag & INP_IPV6PROTO)
1780 local_wild_mapped = inp;
1788 } /* LIST_FOREACH */
1796 inp = local_wild_mapped;
1800 } /* if (lookupflags & INPLOOKUP_WILDCARD) */
1801 INP_GROUP_UNLOCK(pcbgroup);
1806 INP_GROUP_UNLOCK(pcbgroup);
1807 if (lookupflags & INPLOOKUP_WLOCKPCB) {
1809 if (in_pcbrele_wlocked(inp))
1811 } else if (lookupflags & INPLOOKUP_RLOCKPCB) {
1813 if (in_pcbrele_rlocked(inp))
1816 panic("%s: locking bug", __func__);
1819 #endif /* PCBGROUP */
1822 * Lookup PCB in hash list, using pcbinfo tables. This variation assumes
1823 * that the caller has locked the hash list, and will not perform any further
1824 * locking or reference operations on either the hash list or the connection.
1826 static struct inpcb *
1827 in_pcblookup_hash_locked(struct inpcbinfo *pcbinfo, struct in_addr faddr,
1828 u_int fport_arg, struct in_addr laddr, u_int lport_arg, int lookupflags,
1831 struct inpcbhead *head;
1832 struct inpcb *inp, *tmpinp;
1833 u_short fport = fport_arg, lport = lport_arg;
1835 KASSERT((lookupflags & ~(INPLOOKUP_WILDCARD)) == 0,
1836 ("%s: invalid lookup flags %d", __func__, lookupflags));
1838 INP_HASH_LOCK_ASSERT(pcbinfo);
1841 * First look for an exact match.
1844 head = &pcbinfo->ipi_hashbase[INP_PCBHASH(faddr.s_addr, lport, fport,
1845 pcbinfo->ipi_hashmask)];
1846 LIST_FOREACH(inp, head, inp_hash) {
1848 /* XXX inp locking */
1849 if ((inp->inp_vflag & INP_IPV4) == 0)
1852 if (inp->inp_faddr.s_addr == faddr.s_addr &&
1853 inp->inp_laddr.s_addr == laddr.s_addr &&
1854 inp->inp_fport == fport &&
1855 inp->inp_lport == lport) {
1857 * XXX We should be able to directly return
1858 * the inp here, without any checks.
1859 * Well unless both bound with SO_REUSEPORT?
1861 if (prison_flag(inp->inp_cred, PR_IP4))
1871 * Then look for a wildcard match, if requested.
1873 if ((lookupflags & INPLOOKUP_WILDCARD) != 0) {
1874 struct inpcb *local_wild = NULL, *local_exact = NULL;
1876 struct inpcb *local_wild_mapped = NULL;
1878 struct inpcb *jail_wild = NULL;
1882 * Order of socket selection - we always prefer jails.
1883 * 1. jailed, non-wild.
1885 * 3. non-jailed, non-wild.
1886 * 4. non-jailed, wild.
1889 head = &pcbinfo->ipi_hashbase[INP_PCBHASH(INADDR_ANY, lport,
1890 0, pcbinfo->ipi_hashmask)];
1891 LIST_FOREACH(inp, head, inp_hash) {
1893 /* XXX inp locking */
1894 if ((inp->inp_vflag & INP_IPV4) == 0)
1897 if (inp->inp_faddr.s_addr != INADDR_ANY ||
1898 inp->inp_lport != lport)
1901 injail = prison_flag(inp->inp_cred, PR_IP4);
1903 if (prison_check_ip4(inp->inp_cred,
1907 if (local_exact != NULL)
1911 if (inp->inp_laddr.s_addr == laddr.s_addr) {
1916 } else if (inp->inp_laddr.s_addr == INADDR_ANY) {
1918 /* XXX inp locking, NULL check */
1919 if (inp->inp_vflag & INP_IPV6PROTO)
1920 local_wild_mapped = inp;
1928 } /* LIST_FOREACH */
1929 if (jail_wild != NULL)
1931 if (local_exact != NULL)
1932 return (local_exact);
1933 if (local_wild != NULL)
1934 return (local_wild);
1936 if (local_wild_mapped != NULL)
1937 return (local_wild_mapped);
1939 } /* if ((lookupflags & INPLOOKUP_WILDCARD) != 0) */
1945 * Lookup PCB in hash list, using pcbinfo tables. This variation locks the
1946 * hash list lock, and will return the inpcb locked (i.e., requires
1947 * INPLOOKUP_LOCKPCB).
1949 static struct inpcb *
1950 in_pcblookup_hash(struct inpcbinfo *pcbinfo, struct in_addr faddr,
1951 u_int fport, struct in_addr laddr, u_int lport, int lookupflags,
1956 INP_HASH_RLOCK(pcbinfo);
1957 inp = in_pcblookup_hash_locked(pcbinfo, faddr, fport, laddr, lport,
1958 (lookupflags & ~(INPLOOKUP_RLOCKPCB | INPLOOKUP_WLOCKPCB)), ifp);
1961 INP_HASH_RUNLOCK(pcbinfo);
1962 if (lookupflags & INPLOOKUP_WLOCKPCB) {
1964 if (in_pcbrele_wlocked(inp))
1966 } else if (lookupflags & INPLOOKUP_RLOCKPCB) {
1968 if (in_pcbrele_rlocked(inp))
1971 panic("%s: locking bug", __func__);
1973 INP_HASH_RUNLOCK(pcbinfo);
1978 * Public inpcb lookup routines, accepting a 4-tuple, and optionally, an mbuf
1979 * from which a pre-calculated hash value may be extracted.
1981 * Possibly more of this logic should be in in_pcbgroup.c.
1984 in_pcblookup(struct inpcbinfo *pcbinfo, struct in_addr faddr, u_int fport,
1985 struct in_addr laddr, u_int lport, int lookupflags, struct ifnet *ifp)
1987 #if defined(PCBGROUP) && !defined(RSS)
1988 struct inpcbgroup *pcbgroup;
1991 KASSERT((lookupflags & ~INPLOOKUP_MASK) == 0,
1992 ("%s: invalid lookup flags %d", __func__, lookupflags));
1993 KASSERT((lookupflags & (INPLOOKUP_RLOCKPCB | INPLOOKUP_WLOCKPCB)) != 0,
1994 ("%s: LOCKPCB not set", __func__));
1997 * When not using RSS, use connection groups in preference to the
1998 * reservation table when looking up 4-tuples. When using RSS, just
1999 * use the reservation table, due to the cost of the Toeplitz hash
2002 * XXXRW: This policy belongs in the pcbgroup code, as in principle
2003 * we could be doing RSS with a non-Toeplitz hash that is affordable
2006 #if defined(PCBGROUP) && !defined(RSS)
2007 if (in_pcbgroup_enabled(pcbinfo)) {
2008 pcbgroup = in_pcbgroup_bytuple(pcbinfo, laddr, lport, faddr,
2010 return (in_pcblookup_group(pcbinfo, pcbgroup, faddr, fport,
2011 laddr, lport, lookupflags, ifp));
2014 return (in_pcblookup_hash(pcbinfo, faddr, fport, laddr, lport,
2019 in_pcblookup_mbuf(struct inpcbinfo *pcbinfo, struct in_addr faddr,
2020 u_int fport, struct in_addr laddr, u_int lport, int lookupflags,
2021 struct ifnet *ifp, struct mbuf *m)
2024 struct inpcbgroup *pcbgroup;
2027 KASSERT((lookupflags & ~INPLOOKUP_MASK) == 0,
2028 ("%s: invalid lookup flags %d", __func__, lookupflags));
2029 KASSERT((lookupflags & (INPLOOKUP_RLOCKPCB | INPLOOKUP_WLOCKPCB)) != 0,
2030 ("%s: LOCKPCB not set", __func__));
2034 * If we can use a hardware-generated hash to look up the connection
2035 * group, use that connection group to find the inpcb. Otherwise
2036 * fall back on a software hash -- or the reservation table if we're
2039 * XXXRW: As above, that policy belongs in the pcbgroup code.
2041 if (in_pcbgroup_enabled(pcbinfo) &&
2042 !(M_HASHTYPE_TEST(m, M_HASHTYPE_NONE))) {
2043 pcbgroup = in_pcbgroup_byhash(pcbinfo, M_HASHTYPE_GET(m),
2044 m->m_pkthdr.flowid);
2045 if (pcbgroup != NULL)
2046 return (in_pcblookup_group(pcbinfo, pcbgroup, faddr,
2047 fport, laddr, lport, lookupflags, ifp));
2049 pcbgroup = in_pcbgroup_bytuple(pcbinfo, laddr, lport, faddr,
2051 return (in_pcblookup_group(pcbinfo, pcbgroup, faddr, fport,
2052 laddr, lport, lookupflags, ifp));
2056 return (in_pcblookup_hash(pcbinfo, faddr, fport, laddr, lport,
2062 * Insert PCB onto various hash lists.
2065 in_pcbinshash_internal(struct inpcb *inp, int do_pcbgroup_update)
2067 struct inpcbhead *pcbhash;
2068 struct inpcbporthead *pcbporthash;
2069 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
2070 struct inpcbport *phd;
2071 u_int32_t hashkey_faddr;
2073 INP_WLOCK_ASSERT(inp);
2074 INP_HASH_WLOCK_ASSERT(pcbinfo);
2076 KASSERT((inp->inp_flags & INP_INHASHLIST) == 0,
2077 ("in_pcbinshash: INP_INHASHLIST"));
2080 if (inp->inp_vflag & INP_IPV6)
2081 hashkey_faddr = INP6_PCBHASHKEY(&inp->in6p_faddr);
2084 hashkey_faddr = inp->inp_faddr.s_addr;
2086 pcbhash = &pcbinfo->ipi_hashbase[INP_PCBHASH(hashkey_faddr,
2087 inp->inp_lport, inp->inp_fport, pcbinfo->ipi_hashmask)];
2089 pcbporthash = &pcbinfo->ipi_porthashbase[
2090 INP_PCBPORTHASH(inp->inp_lport, pcbinfo->ipi_porthashmask)];
2093 * Go through port list and look for a head for this lport.
2095 LIST_FOREACH(phd, pcbporthash, phd_hash) {
2096 if (phd->phd_port == inp->inp_lport)
2100 * If none exists, malloc one and tack it on.
2103 phd = malloc(sizeof(struct inpcbport), M_PCB, M_NOWAIT);
2105 return (ENOBUFS); /* XXX */
2107 phd->phd_port = inp->inp_lport;
2108 LIST_INIT(&phd->phd_pcblist);
2109 LIST_INSERT_HEAD(pcbporthash, phd, phd_hash);
2112 LIST_INSERT_HEAD(&phd->phd_pcblist, inp, inp_portlist);
2113 LIST_INSERT_HEAD(pcbhash, inp, inp_hash);
2114 inp->inp_flags |= INP_INHASHLIST;
2116 if (do_pcbgroup_update)
2117 in_pcbgroup_update(inp);
2123 * For now, there are two public interfaces to insert an inpcb into the hash
2124 * lists -- one that does update pcbgroups, and one that doesn't. The latter
2125 * is used only in the TCP syncache, where in_pcbinshash is called before the
2126 * full 4-tuple is set for the inpcb, and we don't want to install in the
2127 * pcbgroup until later.
2129 * XXXRW: This seems like a misfeature. in_pcbinshash should always update
2130 * connection groups, and partially initialised inpcbs should not be exposed
2131 * to either reservation hash tables or pcbgroups.
2134 in_pcbinshash(struct inpcb *inp)
2137 return (in_pcbinshash_internal(inp, 1));
2141 in_pcbinshash_nopcbgroup(struct inpcb *inp)
2144 return (in_pcbinshash_internal(inp, 0));
2148 * Move PCB to the proper hash bucket when { faddr, fport } have been
2149 * changed. NOTE: This does not handle the case of the lport changing (the
2150 * hashed port list would have to be updated as well), so the lport must
2151 * not change after in_pcbinshash() has been called.
2154 in_pcbrehash_mbuf(struct inpcb *inp, struct mbuf *m)
2156 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
2157 struct inpcbhead *head;
2158 u_int32_t hashkey_faddr;
2160 INP_WLOCK_ASSERT(inp);
2161 INP_HASH_WLOCK_ASSERT(pcbinfo);
2163 KASSERT(inp->inp_flags & INP_INHASHLIST,
2164 ("in_pcbrehash: !INP_INHASHLIST"));
2167 if (inp->inp_vflag & INP_IPV6)
2168 hashkey_faddr = INP6_PCBHASHKEY(&inp->in6p_faddr);
2171 hashkey_faddr = inp->inp_faddr.s_addr;
2173 head = &pcbinfo->ipi_hashbase[INP_PCBHASH(hashkey_faddr,
2174 inp->inp_lport, inp->inp_fport, pcbinfo->ipi_hashmask)];
2176 LIST_REMOVE(inp, inp_hash);
2177 LIST_INSERT_HEAD(head, inp, inp_hash);
2181 in_pcbgroup_update_mbuf(inp, m);
2183 in_pcbgroup_update(inp);
2188 in_pcbrehash(struct inpcb *inp)
2191 in_pcbrehash_mbuf(inp, NULL);
2195 * Remove PCB from various lists.
2198 in_pcbremlists(struct inpcb *inp)
2200 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
2203 if (pcbinfo == &V_tcbinfo) {
2204 INP_INFO_RLOCK_ASSERT(pcbinfo);
2206 INP_INFO_WLOCK_ASSERT(pcbinfo);
2210 INP_WLOCK_ASSERT(inp);
2211 INP_LIST_WLOCK_ASSERT(pcbinfo);
2213 inp->inp_gencnt = ++pcbinfo->ipi_gencnt;
2214 if (inp->inp_flags & INP_INHASHLIST) {
2215 struct inpcbport *phd = inp->inp_phd;
2217 INP_HASH_WLOCK(pcbinfo);
2218 LIST_REMOVE(inp, inp_hash);
2219 LIST_REMOVE(inp, inp_portlist);
2220 if (LIST_FIRST(&phd->phd_pcblist) == NULL) {
2221 LIST_REMOVE(phd, phd_hash);
2224 INP_HASH_WUNLOCK(pcbinfo);
2225 inp->inp_flags &= ~INP_INHASHLIST;
2227 LIST_REMOVE(inp, inp_list);
2228 pcbinfo->ipi_count--;
2230 in_pcbgroup_remove(inp);
2235 * Check for alternatives when higher level complains
2236 * about service problems. For now, invalidate cached
2237 * routing information. If the route was created dynamically
2238 * (by a redirect), time to try a default gateway again.
2241 in_losing(struct inpcb *inp)
2244 RO_RTFREE(&inp->inp_route);
2245 if (inp->inp_route.ro_lle)
2246 LLE_FREE(inp->inp_route.ro_lle); /* zeros ro_lle */
2251 * A set label operation has occurred at the socket layer, propagate the
2252 * label change into the in_pcb for the socket.
2255 in_pcbsosetlabel(struct socket *so)
2260 inp = sotoinpcb(so);
2261 KASSERT(inp != NULL, ("in_pcbsosetlabel: so->so_pcb == NULL"));
2265 mac_inpcb_sosetlabel(so, inp);
2272 * ipport_tick runs once per second, determining if random port allocation
2273 * should be continued. If more than ipport_randomcps ports have been
2274 * allocated in the last second, then we return to sequential port
2275 * allocation. We return to random allocation only once we drop below
2276 * ipport_randomcps for at least ipport_randomtime seconds.
2279 ipport_tick(void *xtp)
2281 VNET_ITERATOR_DECL(vnet_iter);
2283 VNET_LIST_RLOCK_NOSLEEP();
2284 VNET_FOREACH(vnet_iter) {
2285 CURVNET_SET(vnet_iter); /* XXX appease INVARIANTS here */
2286 if (V_ipport_tcpallocs <=
2287 V_ipport_tcplastcount + V_ipport_randomcps) {
2288 if (V_ipport_stoprandom > 0)
2289 V_ipport_stoprandom--;
2291 V_ipport_stoprandom = V_ipport_randomtime;
2292 V_ipport_tcplastcount = V_ipport_tcpallocs;
2295 VNET_LIST_RUNLOCK_NOSLEEP();
2296 callout_reset(&ipport_tick_callout, hz, ipport_tick, NULL);
2303 callout_stop(&ipport_tick_callout);
2307 * The ipport_callout should start running at about the time we attach the
2308 * inet or inet6 domains.
2311 ipport_tick_init(const void *unused __unused)
2314 /* Start ipport_tick. */
2315 callout_init(&ipport_tick_callout, 1);
2316 callout_reset(&ipport_tick_callout, 1, ipport_tick, NULL);
2317 EVENTHANDLER_REGISTER(shutdown_pre_sync, ip_fini, NULL,
2318 SHUTDOWN_PRI_DEFAULT);
2320 SYSINIT(ipport_tick_init, SI_SUB_PROTO_DOMAIN, SI_ORDER_MIDDLE,
2321 ipport_tick_init, NULL);
2324 inp_wlock(struct inpcb *inp)
2331 inp_wunlock(struct inpcb *inp)
2338 inp_rlock(struct inpcb *inp)
2345 inp_runlock(struct inpcb *inp)
2353 inp_lock_assert(struct inpcb *inp)
2356 INP_WLOCK_ASSERT(inp);
2360 inp_unlock_assert(struct inpcb *inp)
2363 INP_UNLOCK_ASSERT(inp);
2368 inp_apply_all(void (*func)(struct inpcb *, void *), void *arg)
2372 INP_INFO_WLOCK(&V_tcbinfo);
2373 LIST_FOREACH(inp, V_tcbinfo.ipi_listhead, inp_list) {
2378 INP_INFO_WUNLOCK(&V_tcbinfo);
2382 inp_inpcbtosocket(struct inpcb *inp)
2385 INP_WLOCK_ASSERT(inp);
2386 return (inp->inp_socket);
2390 inp_inpcbtotcpcb(struct inpcb *inp)
2393 INP_WLOCK_ASSERT(inp);
2394 return ((struct tcpcb *)inp->inp_ppcb);
2398 inp_ip_tos_get(const struct inpcb *inp)
2401 return (inp->inp_ip_tos);
2405 inp_ip_tos_set(struct inpcb *inp, int val)
2408 inp->inp_ip_tos = val;
2412 inp_4tuple_get(struct inpcb *inp, uint32_t *laddr, uint16_t *lp,
2413 uint32_t *faddr, uint16_t *fp)
2416 INP_LOCK_ASSERT(inp);
2417 *laddr = inp->inp_laddr.s_addr;
2418 *faddr = inp->inp_faddr.s_addr;
2419 *lp = inp->inp_lport;
2420 *fp = inp->inp_fport;
2424 so_sotoinpcb(struct socket *so)
2427 return (sotoinpcb(so));
2431 so_sototcpcb(struct socket *so)
2434 return (sototcpcb(so));
2439 db_print_indent(int indent)
2443 for (i = 0; i < indent; i++)
2448 db_print_inconninfo(struct in_conninfo *inc, const char *name, int indent)
2450 char faddr_str[48], laddr_str[48];
2452 db_print_indent(indent);
2453 db_printf("%s at %p\n", name, inc);
2458 if (inc->inc_flags & INC_ISIPV6) {
2460 ip6_sprintf(laddr_str, &inc->inc6_laddr);
2461 ip6_sprintf(faddr_str, &inc->inc6_faddr);
2466 inet_ntoa_r(inc->inc_laddr, laddr_str);
2467 inet_ntoa_r(inc->inc_faddr, faddr_str);
2469 db_print_indent(indent);
2470 db_printf("inc_laddr %s inc_lport %u\n", laddr_str,
2471 ntohs(inc->inc_lport));
2472 db_print_indent(indent);
2473 db_printf("inc_faddr %s inc_fport %u\n", faddr_str,
2474 ntohs(inc->inc_fport));
2478 db_print_inpflags(int inp_flags)
2483 if (inp_flags & INP_RECVOPTS) {
2484 db_printf("%sINP_RECVOPTS", comma ? ", " : "");
2487 if (inp_flags & INP_RECVRETOPTS) {
2488 db_printf("%sINP_RECVRETOPTS", comma ? ", " : "");
2491 if (inp_flags & INP_RECVDSTADDR) {
2492 db_printf("%sINP_RECVDSTADDR", comma ? ", " : "");
2495 if (inp_flags & INP_HDRINCL) {
2496 db_printf("%sINP_HDRINCL", comma ? ", " : "");
2499 if (inp_flags & INP_HIGHPORT) {
2500 db_printf("%sINP_HIGHPORT", comma ? ", " : "");
2503 if (inp_flags & INP_LOWPORT) {
2504 db_printf("%sINP_LOWPORT", comma ? ", " : "");
2507 if (inp_flags & INP_ANONPORT) {
2508 db_printf("%sINP_ANONPORT", comma ? ", " : "");
2511 if (inp_flags & INP_RECVIF) {
2512 db_printf("%sINP_RECVIF", comma ? ", " : "");
2515 if (inp_flags & INP_MTUDISC) {
2516 db_printf("%sINP_MTUDISC", comma ? ", " : "");
2519 if (inp_flags & INP_RECVTTL) {
2520 db_printf("%sINP_RECVTTL", comma ? ", " : "");
2523 if (inp_flags & INP_DONTFRAG) {
2524 db_printf("%sINP_DONTFRAG", comma ? ", " : "");
2527 if (inp_flags & INP_RECVTOS) {
2528 db_printf("%sINP_RECVTOS", comma ? ", " : "");
2531 if (inp_flags & IN6P_IPV6_V6ONLY) {
2532 db_printf("%sIN6P_IPV6_V6ONLY", comma ? ", " : "");
2535 if (inp_flags & IN6P_PKTINFO) {
2536 db_printf("%sIN6P_PKTINFO", comma ? ", " : "");
2539 if (inp_flags & IN6P_HOPLIMIT) {
2540 db_printf("%sIN6P_HOPLIMIT", comma ? ", " : "");
2543 if (inp_flags & IN6P_HOPOPTS) {
2544 db_printf("%sIN6P_HOPOPTS", comma ? ", " : "");
2547 if (inp_flags & IN6P_DSTOPTS) {
2548 db_printf("%sIN6P_DSTOPTS", comma ? ", " : "");
2551 if (inp_flags & IN6P_RTHDR) {
2552 db_printf("%sIN6P_RTHDR", comma ? ", " : "");
2555 if (inp_flags & IN6P_RTHDRDSTOPTS) {
2556 db_printf("%sIN6P_RTHDRDSTOPTS", comma ? ", " : "");
2559 if (inp_flags & IN6P_TCLASS) {
2560 db_printf("%sIN6P_TCLASS", comma ? ", " : "");
2563 if (inp_flags & IN6P_AUTOFLOWLABEL) {
2564 db_printf("%sIN6P_AUTOFLOWLABEL", comma ? ", " : "");
2567 if (inp_flags & INP_TIMEWAIT) {
2568 db_printf("%sINP_TIMEWAIT", comma ? ", " : "");
2571 if (inp_flags & INP_ONESBCAST) {
2572 db_printf("%sINP_ONESBCAST", comma ? ", " : "");
2575 if (inp_flags & INP_DROPPED) {
2576 db_printf("%sINP_DROPPED", comma ? ", " : "");
2579 if (inp_flags & INP_SOCKREF) {
2580 db_printf("%sINP_SOCKREF", comma ? ", " : "");
2583 if (inp_flags & IN6P_RFC2292) {
2584 db_printf("%sIN6P_RFC2292", comma ? ", " : "");
2587 if (inp_flags & IN6P_MTU) {
2588 db_printf("IN6P_MTU%s", comma ? ", " : "");
2594 db_print_inpvflag(u_char inp_vflag)
2599 if (inp_vflag & INP_IPV4) {
2600 db_printf("%sINP_IPV4", comma ? ", " : "");
2603 if (inp_vflag & INP_IPV6) {
2604 db_printf("%sINP_IPV6", comma ? ", " : "");
2607 if (inp_vflag & INP_IPV6PROTO) {
2608 db_printf("%sINP_IPV6PROTO", comma ? ", " : "");
2614 db_print_inpcb(struct inpcb *inp, const char *name, int indent)
2617 db_print_indent(indent);
2618 db_printf("%s at %p\n", name, inp);
2622 db_print_indent(indent);
2623 db_printf("inp_flow: 0x%x\n", inp->inp_flow);
2625 db_print_inconninfo(&inp->inp_inc, "inp_conninfo", indent);
2627 db_print_indent(indent);
2628 db_printf("inp_ppcb: %p inp_pcbinfo: %p inp_socket: %p\n",
2629 inp->inp_ppcb, inp->inp_pcbinfo, inp->inp_socket);
2631 db_print_indent(indent);
2632 db_printf("inp_label: %p inp_flags: 0x%x (",
2633 inp->inp_label, inp->inp_flags);
2634 db_print_inpflags(inp->inp_flags);
2637 db_print_indent(indent);
2638 db_printf("inp_sp: %p inp_vflag: 0x%x (", inp->inp_sp,
2640 db_print_inpvflag(inp->inp_vflag);
2643 db_print_indent(indent);
2644 db_printf("inp_ip_ttl: %d inp_ip_p: %d inp_ip_minttl: %d\n",
2645 inp->inp_ip_ttl, inp->inp_ip_p, inp->inp_ip_minttl);
2647 db_print_indent(indent);
2649 if (inp->inp_vflag & INP_IPV6) {
2650 db_printf("in6p_options: %p in6p_outputopts: %p "
2651 "in6p_moptions: %p\n", inp->in6p_options,
2652 inp->in6p_outputopts, inp->in6p_moptions);
2653 db_printf("in6p_icmp6filt: %p in6p_cksum %d "
2654 "in6p_hops %u\n", inp->in6p_icmp6filt, inp->in6p_cksum,
2659 db_printf("inp_ip_tos: %d inp_ip_options: %p "
2660 "inp_ip_moptions: %p\n", inp->inp_ip_tos,
2661 inp->inp_options, inp->inp_moptions);
2664 db_print_indent(indent);
2665 db_printf("inp_phd: %p inp_gencnt: %ju\n", inp->inp_phd,
2666 (uintmax_t)inp->inp_gencnt);
2669 DB_SHOW_COMMAND(inpcb, db_show_inpcb)
2674 db_printf("usage: show inpcb <addr>\n");
2677 inp = (struct inpcb *)addr;
2679 db_print_inpcb(inp, "inpcb", 0);
2685 * Modify TX rate limit based on the existing "inp->inp_snd_tag",
2689 in_pcbmodify_txrtlmt(struct inpcb *inp, uint32_t max_pacing_rate)
2691 union if_snd_tag_modify_params params = {
2692 .rate_limit.max_rate = max_pacing_rate,
2694 struct m_snd_tag *mst;
2698 mst = inp->inp_snd_tag;
2706 if (ifp->if_snd_tag_modify == NULL) {
2709 error = ifp->if_snd_tag_modify(mst, ¶ms);
2715 * Query existing TX rate limit based on the existing
2716 * "inp->inp_snd_tag", if any.
2719 in_pcbquery_txrtlmt(struct inpcb *inp, uint32_t *p_max_pacing_rate)
2721 union if_snd_tag_query_params params = { };
2722 struct m_snd_tag *mst;
2726 mst = inp->inp_snd_tag;
2734 if (ifp->if_snd_tag_query == NULL) {
2737 error = ifp->if_snd_tag_query(mst, ¶ms);
2738 if (error == 0 && p_max_pacing_rate != NULL)
2739 *p_max_pacing_rate = params.rate_limit.max_rate;
2745 * Allocate a new TX rate limit send tag from the network interface
2746 * given by the "ifp" argument and save it in "inp->inp_snd_tag":
2749 in_pcbattach_txrtlmt(struct inpcb *inp, struct ifnet *ifp,
2750 uint32_t flowtype, uint32_t flowid, uint32_t max_pacing_rate)
2752 union if_snd_tag_alloc_params params = {
2753 .rate_limit.hdr.type = IF_SND_TAG_TYPE_RATE_LIMIT,
2754 .rate_limit.hdr.flowid = flowid,
2755 .rate_limit.hdr.flowtype = flowtype,
2756 .rate_limit.max_rate = max_pacing_rate,
2760 INP_WLOCK_ASSERT(inp);
2762 if (inp->inp_snd_tag != NULL)
2765 if (ifp->if_snd_tag_alloc == NULL) {
2768 error = ifp->if_snd_tag_alloc(ifp, ¶ms, &inp->inp_snd_tag);
2771 * At success increment the refcount on
2772 * the send tag's network interface:
2775 if_ref(inp->inp_snd_tag->ifp);
2781 * Free an existing TX rate limit tag based on the "inp->inp_snd_tag",
2785 in_pcbdetach_txrtlmt(struct inpcb *inp)
2787 struct m_snd_tag *mst;
2790 INP_WLOCK_ASSERT(inp);
2792 mst = inp->inp_snd_tag;
2793 inp->inp_snd_tag = NULL;
2803 * If the device was detached while we still had reference(s)
2804 * on the ifp, we assume if_snd_tag_free() was replaced with
2807 ifp->if_snd_tag_free(mst);
2809 /* release reference count on network interface */
2814 * This function should be called when the INP_RATE_LIMIT_CHANGED flag
2815 * is set in the fast path and will attach/detach/modify the TX rate
2816 * limit send tag based on the socket's so_max_pacing_rate value.
2819 in_pcboutput_txrtlmt(struct inpcb *inp, struct ifnet *ifp, struct mbuf *mb)
2821 struct socket *socket;
2822 uint32_t max_pacing_rate;
2829 socket = inp->inp_socket;
2833 if (!INP_WLOCKED(inp)) {
2835 * NOTE: If the write locking fails, we need to bail
2836 * out and use the non-ratelimited ring for the
2837 * transmit until there is a new chance to get the
2840 if (!INP_TRY_UPGRADE(inp))
2848 * NOTE: The so_max_pacing_rate value is read unlocked,
2849 * because atomic updates are not required since the variable
2850 * is checked at every mbuf we send. It is assumed that the
2851 * variable read itself will be atomic.
2853 max_pacing_rate = socket->so_max_pacing_rate;
2856 * NOTE: When attaching to a network interface a reference is
2857 * made to ensure the network interface doesn't go away until
2858 * all ratelimit connections are gone. The network interface
2859 * pointers compared below represent valid network interfaces,
2860 * except when comparing towards NULL.
2862 if (max_pacing_rate == 0 && inp->inp_snd_tag == NULL) {
2864 } else if (!(ifp->if_capenable & IFCAP_TXRTLMT)) {
2865 if (inp->inp_snd_tag != NULL)
2866 in_pcbdetach_txrtlmt(inp);
2868 } else if (inp->inp_snd_tag == NULL) {
2870 * In order to utilize packet pacing with RSS, we need
2871 * to wait until there is a valid RSS hash before we
2874 if (M_HASHTYPE_GET(mb) == M_HASHTYPE_NONE) {
2877 error = in_pcbattach_txrtlmt(inp, ifp, M_HASHTYPE_GET(mb),
2878 mb->m_pkthdr.flowid, max_pacing_rate);
2881 error = in_pcbmodify_txrtlmt(inp, max_pacing_rate);
2883 if (error == 0 || error == EOPNOTSUPP)
2884 inp->inp_flags2 &= ~INP_RATE_LIMIT_CHANGED;
2890 * Track route changes for TX rate limiting.
2893 in_pcboutput_eagain(struct inpcb *inp)
2895 struct socket *socket;
2901 socket = inp->inp_socket;
2905 if (inp->inp_snd_tag == NULL)
2908 if (!INP_WLOCKED(inp)) {
2910 * NOTE: If the write locking fails, we need to bail
2911 * out and use the non-ratelimited ring for the
2912 * transmit until there is a new chance to get the
2915 if (!INP_TRY_UPGRADE(inp))
2922 /* detach rate limiting */
2923 in_pcbdetach_txrtlmt(inp);
2925 /* make sure new mbuf send tag allocation is made */
2926 inp->inp_flags2 |= INP_RATE_LIMIT_CHANGED;
2931 #endif /* RATELIMIT */