FreeBSD/Linux Kernel Cross Reference
sys/netinet/in_pcb.c
1 /*-
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.
6 * All rights reserved.
7 *
8 * Portions of this software were developed by Robert N. M. Watson under
9 * contract to Juniper Networks, Inc.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
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.
22 *
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
33 * SUCH DAMAGE.
34 *
35 * @(#)in_pcb.c 8.4 (Berkeley) 5/24/95
36 */
37
38 #include <sys/cdefs.h>
39 __FBSDID("$FreeBSD: releng/10.4/sys/netinet/in_pcb.c 314667 2017-03-04 13:03:31Z avg $");
40
41 #include "opt_ddb.h"
42 #include "opt_ipsec.h"
43 #include "opt_inet.h"
44 #include "opt_inet6.h"
45 #include "opt_pcbgroup.h"
46
47 #include <sys/param.h>
48 #include <sys/systm.h>
49 #include <sys/malloc.h>
50 #include <sys/mbuf.h>
51 #include <sys/callout.h>
52 #include <sys/domain.h>
53 #include <sys/protosw.h>
54 #include <sys/socket.h>
55 #include <sys/socketvar.h>
56 #include <sys/priv.h>
57 #include <sys/proc.h>
58 #include <sys/refcount.h>
59 #include <sys/jail.h>
60 #include <sys/kernel.h>
61 #include <sys/sysctl.h>
62
63 #ifdef DDB
64 #include <ddb/ddb.h>
65 #endif
66
67 #include <vm/uma.h>
68
69 #include <net/if.h>
70 #include <net/if_types.h>
71 #include <net/route.h>
72 #include <net/vnet.h>
73
74 #if defined(INET) || defined(INET6)
75 #include <netinet/in.h>
76 #include <netinet/in_pcb.h>
77 #include <netinet/ip_var.h>
78 #include <netinet/tcp_var.h>
79 #include <netinet/udp.h>
80 #include <netinet/udp_var.h>
81 #endif
82 #ifdef INET
83 #include <netinet/in_var.h>
84 #endif
85 #ifdef INET6
86 #include <netinet/ip6.h>
87 #include <netinet6/in6_pcb.h>
88 #include <netinet6/in6_var.h>
89 #include <netinet6/ip6_var.h>
90 #endif /* INET6 */
91
92
93 #ifdef IPSEC
94 #include <netipsec/ipsec.h>
95 #include <netipsec/key.h>
96 #endif /* IPSEC */
97
98 #include <security/mac/mac_framework.h>
99
100 static struct callout ipport_tick_callout;
101
102 /*
103 * These configure the range of local port addresses assigned to
104 * "unspecified" outgoing connections/packets/whatever.
105 */
106 VNET_DEFINE(int, ipport_lowfirstauto) = IPPORT_RESERVED - 1; /* 1023 */
107 VNET_DEFINE(int, ipport_lowlastauto) = IPPORT_RESERVEDSTART; /* 600 */
108 VNET_DEFINE(int, ipport_firstauto) = IPPORT_EPHEMERALFIRST; /* 10000 */
109 VNET_DEFINE(int, ipport_lastauto) = IPPORT_EPHEMERALLAST; /* 65535 */
110 VNET_DEFINE(int, ipport_hifirstauto) = IPPORT_HIFIRSTAUTO; /* 49152 */
111 VNET_DEFINE(int, ipport_hilastauto) = IPPORT_HILASTAUTO; /* 65535 */
112
113 /*
114 * Reserved ports accessible only to root. There are significant
115 * security considerations that must be accounted for when changing these,
116 * but the security benefits can be great. Please be careful.
117 */
118 VNET_DEFINE(int, ipport_reservedhigh) = IPPORT_RESERVED - 1; /* 1023 */
119 VNET_DEFINE(int, ipport_reservedlow);
120
121 /* Variables dealing with random ephemeral port allocation. */
122 VNET_DEFINE(int, ipport_randomized) = 1; /* user controlled via sysctl */
123 VNET_DEFINE(int, ipport_randomcps) = 10; /* user controlled via sysctl */
124 VNET_DEFINE(int, ipport_randomtime) = 45; /* user controlled via sysctl */
125 VNET_DEFINE(int, ipport_stoprandom); /* toggled by ipport_tick */
126 VNET_DEFINE(int, ipport_tcpallocs);
127 static VNET_DEFINE(int, ipport_tcplastcount);
128
129 #define V_ipport_tcplastcount VNET(ipport_tcplastcount)
130
131 static void in_pcbremlists(struct inpcb *inp);
132 #ifdef INET
133 static struct inpcb *in_pcblookup_hash_locked(struct inpcbinfo *pcbinfo,
134 struct in_addr faddr, u_int fport_arg,
135 struct in_addr laddr, u_int lport_arg,
136 int lookupflags, struct ifnet *ifp);
137
138 #define RANGECHK(var, min, max) \
139 if ((var) < (min)) { (var) = (min); } \
140 else if ((var) > (max)) { (var) = (max); }
141
142 static int
143 sysctl_net_ipport_check(SYSCTL_HANDLER_ARGS)
144 {
145 int error;
146
147 error = sysctl_handle_int(oidp, arg1, arg2, req);
148 if (error == 0) {
149 RANGECHK(V_ipport_lowfirstauto, 1, IPPORT_RESERVED - 1);
150 RANGECHK(V_ipport_lowlastauto, 1, IPPORT_RESERVED - 1);
151 RANGECHK(V_ipport_firstauto, IPPORT_RESERVED, IPPORT_MAX);
152 RANGECHK(V_ipport_lastauto, IPPORT_RESERVED, IPPORT_MAX);
153 RANGECHK(V_ipport_hifirstauto, IPPORT_RESERVED, IPPORT_MAX);
154 RANGECHK(V_ipport_hilastauto, IPPORT_RESERVED, IPPORT_MAX);
155 }
156 return (error);
157 }
158
159 #undef RANGECHK
160
161 static SYSCTL_NODE(_net_inet_ip, IPPROTO_IP, portrange, CTLFLAG_RW, 0,
162 "IP Ports");
163
164 SYSCTL_VNET_PROC(_net_inet_ip_portrange, OID_AUTO, lowfirst,
165 CTLTYPE_INT|CTLFLAG_RW, &VNET_NAME(ipport_lowfirstauto), 0,
166 &sysctl_net_ipport_check, "I", "");
167 SYSCTL_VNET_PROC(_net_inet_ip_portrange, OID_AUTO, lowlast,
168 CTLTYPE_INT|CTLFLAG_RW, &VNET_NAME(ipport_lowlastauto), 0,
169 &sysctl_net_ipport_check, "I", "");
170 SYSCTL_VNET_PROC(_net_inet_ip_portrange, OID_AUTO, first,
171 CTLTYPE_INT|CTLFLAG_RW, &VNET_NAME(ipport_firstauto), 0,
172 &sysctl_net_ipport_check, "I", "");
173 SYSCTL_VNET_PROC(_net_inet_ip_portrange, OID_AUTO, last,
174 CTLTYPE_INT|CTLFLAG_RW, &VNET_NAME(ipport_lastauto), 0,
175 &sysctl_net_ipport_check, "I", "");
176 SYSCTL_VNET_PROC(_net_inet_ip_portrange, OID_AUTO, hifirst,
177 CTLTYPE_INT|CTLFLAG_RW, &VNET_NAME(ipport_hifirstauto), 0,
178 &sysctl_net_ipport_check, "I", "");
179 SYSCTL_VNET_PROC(_net_inet_ip_portrange, OID_AUTO, hilast,
180 CTLTYPE_INT|CTLFLAG_RW, &VNET_NAME(ipport_hilastauto), 0,
181 &sysctl_net_ipport_check, "I", "");
182 SYSCTL_VNET_INT(_net_inet_ip_portrange, OID_AUTO, reservedhigh,
183 CTLFLAG_RW|CTLFLAG_SECURE, &VNET_NAME(ipport_reservedhigh), 0, "");
184 SYSCTL_VNET_INT(_net_inet_ip_portrange, OID_AUTO, reservedlow,
185 CTLFLAG_RW|CTLFLAG_SECURE, &VNET_NAME(ipport_reservedlow), 0, "");
186 SYSCTL_VNET_INT(_net_inet_ip_portrange, OID_AUTO, randomized, CTLFLAG_RW,
187 &VNET_NAME(ipport_randomized), 0, "Enable random port allocation");
188 SYSCTL_VNET_INT(_net_inet_ip_portrange, OID_AUTO, randomcps, CTLFLAG_RW,
189 &VNET_NAME(ipport_randomcps), 0, "Maximum number of random port "
190 "allocations before switching to a sequental one");
191 SYSCTL_VNET_INT(_net_inet_ip_portrange, OID_AUTO, randomtime, CTLFLAG_RW,
192 &VNET_NAME(ipport_randomtime), 0,
193 "Minimum time to keep sequental port "
194 "allocation before switching to a random one");
195 #endif /* INET */
196
197 /*
198 * in_pcb.c: manage the Protocol Control Blocks.
199 *
200 * NOTE: It is assumed that most of these functions will be called with
201 * the pcbinfo lock held, and often, the inpcb lock held, as these utility
202 * functions often modify hash chains or addresses in pcbs.
203 */
204
205 /*
206 * Initialize an inpcbinfo -- we should be able to reduce the number of
207 * arguments in time.
208 */
209 void
210 in_pcbinfo_init(struct inpcbinfo *pcbinfo, const char *name,
211 struct inpcbhead *listhead, int hash_nelements, int porthash_nelements,
212 char *inpcbzone_name, uma_init inpcbzone_init, uma_fini inpcbzone_fini,
213 uint32_t inpcbzone_flags, u_int hashfields)
214 {
215
216 INP_INFO_LOCK_INIT(pcbinfo, name);
217 INP_HASH_LOCK_INIT(pcbinfo, "pcbinfohash"); /* XXXRW: argument? */
218 INP_LIST_LOCK_INIT(pcbinfo, "pcbinfolist");
219 #ifdef VIMAGE
220 pcbinfo->ipi_vnet = curvnet;
221 #endif
222 pcbinfo->ipi_listhead = listhead;
223 LIST_INIT(pcbinfo->ipi_listhead);
224 pcbinfo->ipi_count = 0;
225 pcbinfo->ipi_hashbase = hashinit(hash_nelements, M_PCB,
226 &pcbinfo->ipi_hashmask);
227 pcbinfo->ipi_porthashbase = hashinit(porthash_nelements, M_PCB,
228 &pcbinfo->ipi_porthashmask);
229 #ifdef PCBGROUP
230 in_pcbgroup_init(pcbinfo, hashfields, hash_nelements);
231 #endif
232 pcbinfo->ipi_zone = uma_zcreate(inpcbzone_name, sizeof(struct inpcb),
233 NULL, NULL, inpcbzone_init, inpcbzone_fini, UMA_ALIGN_PTR,
234 inpcbzone_flags);
235 uma_zone_set_max(pcbinfo->ipi_zone, maxsockets);
236 uma_zone_set_warning(pcbinfo->ipi_zone,
237 "kern.ipc.maxsockets limit reached");
238 }
239
240 /*
241 * Destroy an inpcbinfo.
242 */
243 void
244 in_pcbinfo_destroy(struct inpcbinfo *pcbinfo)
245 {
246
247 KASSERT(pcbinfo->ipi_count == 0,
248 ("%s: ipi_count = %u", __func__, pcbinfo->ipi_count));
249
250 hashdestroy(pcbinfo->ipi_hashbase, M_PCB, pcbinfo->ipi_hashmask);
251 hashdestroy(pcbinfo->ipi_porthashbase, M_PCB,
252 pcbinfo->ipi_porthashmask);
253 #ifdef PCBGROUP
254 in_pcbgroup_destroy(pcbinfo);
255 #endif
256 uma_zdestroy(pcbinfo->ipi_zone);
257 INP_LIST_LOCK_DESTROY(pcbinfo);
258 INP_HASH_LOCK_DESTROY(pcbinfo);
259 INP_INFO_LOCK_DESTROY(pcbinfo);
260 }
261
262 /*
263 * Allocate a PCB and associate it with the socket.
264 * On success return with the PCB locked.
265 */
266 int
267 in_pcballoc(struct socket *so, struct inpcbinfo *pcbinfo)
268 {
269 struct inpcb *inp;
270 int error;
271
272 #ifdef INVARIANTS
273 if (pcbinfo == &V_tcbinfo) {
274 INP_INFO_RLOCK_ASSERT(pcbinfo);
275 } else {
276 INP_INFO_WLOCK_ASSERT(pcbinfo);
277 }
278 #endif
279
280 error = 0;
281 inp = uma_zalloc(pcbinfo->ipi_zone, M_NOWAIT);
282 if (inp == NULL)
283 return (ENOBUFS);
284 bzero(inp, inp_zero_size);
285 inp->inp_pcbinfo = pcbinfo;
286 inp->inp_socket = so;
287 inp->inp_cred = crhold(so->so_cred);
288 inp->inp_inc.inc_fibnum = so->so_fibnum;
289 #ifdef MAC
290 error = mac_inpcb_init(inp, M_NOWAIT);
291 if (error != 0)
292 goto out;
293 mac_inpcb_create(so, inp);
294 #endif
295 #ifdef IPSEC
296 error = ipsec_init_policy(so, &inp->inp_sp);
297 if (error != 0) {
298 #ifdef MAC
299 mac_inpcb_destroy(inp);
300 #endif
301 goto out;
302 }
303 #endif /*IPSEC*/
304 #ifdef INET6
305 if (INP_SOCKAF(so) == AF_INET6) {
306 inp->inp_vflag |= INP_IPV6PROTO;
307 if (V_ip6_v6only)
308 inp->inp_flags |= IN6P_IPV6_V6ONLY;
309 }
310 #endif
311 INP_WLOCK(inp);
312 INP_LIST_WLOCK(pcbinfo);
313 LIST_INSERT_HEAD(pcbinfo->ipi_listhead, inp, inp_list);
314 pcbinfo->ipi_count++;
315 so->so_pcb = (caddr_t)inp;
316 #ifdef INET6
317 if (V_ip6_auto_flowlabel)
318 inp->inp_flags |= IN6P_AUTOFLOWLABEL;
319 #endif
320 inp->inp_gencnt = ++pcbinfo->ipi_gencnt;
321 refcount_init(&inp->inp_refcount, 1); /* Reference from inpcbinfo */
322 INP_LIST_WUNLOCK(pcbinfo);
323 #if defined(IPSEC) || defined(MAC)
324 out:
325 if (error != 0) {
326 crfree(inp->inp_cred);
327 uma_zfree(pcbinfo->ipi_zone, inp);
328 }
329 #endif
330 return (error);
331 }
332
333 #ifdef INET
334 int
335 in_pcbbind(struct inpcb *inp, struct sockaddr *nam, struct ucred *cred)
336 {
337 int anonport, error;
338
339 INP_WLOCK_ASSERT(inp);
340 INP_HASH_WLOCK_ASSERT(inp->inp_pcbinfo);
341
342 if (inp->inp_lport != 0 || inp->inp_laddr.s_addr != INADDR_ANY)
343 return (EINVAL);
344 anonport = nam == NULL || ((struct sockaddr_in *)nam)->sin_port == 0;
345 error = in_pcbbind_setup(inp, nam, &inp->inp_laddr.s_addr,
346 &inp->inp_lport, cred);
347 if (error)
348 return (error);
349 if (in_pcbinshash(inp) != 0) {
350 inp->inp_laddr.s_addr = INADDR_ANY;
351 inp->inp_lport = 0;
352 return (EAGAIN);
353 }
354 if (anonport)
355 inp->inp_flags |= INP_ANONPORT;
356 return (0);
357 }
358 #endif
359
360 #if defined(INET) || defined(INET6)
361 int
362 in_pcb_lport(struct inpcb *inp, struct in_addr *laddrp, u_short *lportp,
363 struct ucred *cred, int lookupflags)
364 {
365 struct inpcbinfo *pcbinfo;
366 struct inpcb *tmpinp;
367 unsigned short *lastport;
368 int count, dorandom, error;
369 u_short aux, first, last, lport;
370 #ifdef INET
371 struct in_addr laddr;
372 #endif
373
374 pcbinfo = inp->inp_pcbinfo;
375
376 /*
377 * Because no actual state changes occur here, a global write lock on
378 * the pcbinfo isn't required.
379 */
380 INP_LOCK_ASSERT(inp);
381 INP_HASH_LOCK_ASSERT(pcbinfo);
382
383 if (inp->inp_flags & INP_HIGHPORT) {
384 first = V_ipport_hifirstauto; /* sysctl */
385 last = V_ipport_hilastauto;
386 lastport = &pcbinfo->ipi_lasthi;
387 } else if (inp->inp_flags & INP_LOWPORT) {
388 error = priv_check_cred(cred, PRIV_NETINET_RESERVEDPORT, 0);
389 if (error)
390 return (error);
391 first = V_ipport_lowfirstauto; /* 1023 */
392 last = V_ipport_lowlastauto; /* 600 */
393 lastport = &pcbinfo->ipi_lastlow;
394 } else {
395 first = V_ipport_firstauto; /* sysctl */
396 last = V_ipport_lastauto;
397 lastport = &pcbinfo->ipi_lastport;
398 }
399 /*
400 * For UDP(-Lite), use random port allocation as long as the user
401 * allows it. For TCP (and as of yet unknown) connections,
402 * use random port allocation only if the user allows it AND
403 * ipport_tick() allows it.
404 */
405 if (V_ipport_randomized &&
406 (!V_ipport_stoprandom || pcbinfo == &V_udbinfo ||
407 pcbinfo == &V_ulitecbinfo))
408 dorandom = 1;
409 else
410 dorandom = 0;
411 /*
412 * It makes no sense to do random port allocation if
413 * we have the only port available.
414 */
415 if (first == last)
416 dorandom = 0;
417 /* Make sure to not include UDP(-Lite) packets in the count. */
418 if (pcbinfo != &V_udbinfo || pcbinfo != &V_ulitecbinfo)
419 V_ipport_tcpallocs++;
420 /*
421 * Instead of having two loops further down counting up or down
422 * make sure that first is always <= last and go with only one
423 * code path implementing all logic.
424 */
425 if (first > last) {
426 aux = first;
427 first = last;
428 last = aux;
429 }
430
431 #ifdef INET
432 /* Make the compiler happy. */
433 laddr.s_addr = 0;
434 if ((inp->inp_vflag & (INP_IPV4|INP_IPV6)) == INP_IPV4) {
435 KASSERT(laddrp != NULL, ("%s: laddrp NULL for v4 inp %p",
436 __func__, inp));
437 laddr = *laddrp;
438 }
439 #endif
440 tmpinp = NULL; /* Make compiler happy. */
441 lport = *lportp;
442
443 if (dorandom)
444 *lastport = first + (arc4random() % (last - first));
445
446 count = last - first;
447
448 do {
449 if (count-- < 0) /* completely used? */
450 return (EADDRNOTAVAIL);
451 ++*lastport;
452 if (*lastport < first || *lastport > last)
453 *lastport = first;
454 lport = htons(*lastport);
455
456 #ifdef INET6
457 if ((inp->inp_vflag & INP_IPV6) != 0)
458 tmpinp = in6_pcblookup_local(pcbinfo,
459 &inp->in6p_laddr, lport, lookupflags, cred);
460 #endif
461 #if defined(INET) && defined(INET6)
462 else
463 #endif
464 #ifdef INET
465 tmpinp = in_pcblookup_local(pcbinfo, laddr,
466 lport, lookupflags, cred);
467 #endif
468 } while (tmpinp != NULL);
469
470 #ifdef INET
471 if ((inp->inp_vflag & (INP_IPV4|INP_IPV6)) == INP_IPV4)
472 laddrp->s_addr = laddr.s_addr;
473 #endif
474 *lportp = lport;
475
476 return (0);
477 }
478
479 /*
480 * Return cached socket options.
481 */
482 short
483 inp_so_options(const struct inpcb *inp)
484 {
485 short so_options;
486
487 so_options = 0;
488
489 if ((inp->inp_flags2 & INP_REUSEPORT) != 0)
490 so_options |= SO_REUSEPORT;
491 if ((inp->inp_flags2 & INP_REUSEADDR) != 0)
492 so_options |= SO_REUSEADDR;
493 return (so_options);
494 }
495 #endif /* INET || INET6 */
496
497 #ifdef INET
498 /*
499 * Set up a bind operation on a PCB, performing port allocation
500 * as required, but do not actually modify the PCB. Callers can
501 * either complete the bind by setting inp_laddr/inp_lport and
502 * calling in_pcbinshash(), or they can just use the resulting
503 * port and address to authorise the sending of a once-off packet.
504 *
505 * On error, the values of *laddrp and *lportp are not changed.
506 */
507 int
508 in_pcbbind_setup(struct inpcb *inp, struct sockaddr *nam, in_addr_t *laddrp,
509 u_short *lportp, struct ucred *cred)
510 {
511 struct socket *so = inp->inp_socket;
512 struct sockaddr_in *sin;
513 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
514 struct in_addr laddr;
515 u_short lport = 0;
516 int lookupflags = 0, reuseport = (so->so_options & SO_REUSEPORT);
517 int error;
518
519 /*
520 * No state changes, so read locks are sufficient here.
521 */
522 INP_LOCK_ASSERT(inp);
523 INP_HASH_LOCK_ASSERT(pcbinfo);
524
525 if (TAILQ_EMPTY(&V_in_ifaddrhead)) /* XXX broken! */
526 return (EADDRNOTAVAIL);
527 laddr.s_addr = *laddrp;
528 if (nam != NULL && laddr.s_addr != INADDR_ANY)
529 return (EINVAL);
530 if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) == 0)
531 lookupflags = INPLOOKUP_WILDCARD;
532 if (nam == NULL) {
533 if ((error = prison_local_ip4(cred, &laddr)) != 0)
534 return (error);
535 } else {
536 sin = (struct sockaddr_in *)nam;
537 if (nam->sa_len != sizeof (*sin))
538 return (EINVAL);
539 #ifdef notdef
540 /*
541 * We should check the family, but old programs
542 * incorrectly fail to initialize it.
543 */
544 if (sin->sin_family != AF_INET)
545 return (EAFNOSUPPORT);
546 #endif
547 error = prison_local_ip4(cred, &sin->sin_addr);
548 if (error)
549 return (error);
550 if (sin->sin_port != *lportp) {
551 /* Don't allow the port to change. */
552 if (*lportp != 0)
553 return (EINVAL);
554 lport = sin->sin_port;
555 }
556 /* NB: lport is left as 0 if the port isn't being changed. */
557 if (IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
558 /*
559 * Treat SO_REUSEADDR as SO_REUSEPORT for multicast;
560 * allow complete duplication of binding if
561 * SO_REUSEPORT is set, or if SO_REUSEADDR is set
562 * and a multicast address is bound on both
563 * new and duplicated sockets.
564 */
565 if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) != 0)
566 reuseport = SO_REUSEADDR|SO_REUSEPORT;
567 } else if (sin->sin_addr.s_addr != INADDR_ANY) {
568 sin->sin_port = 0; /* yech... */
569 bzero(&sin->sin_zero, sizeof(sin->sin_zero));
570 /*
571 * Is the address a local IP address?
572 * If INP_BINDANY is set, then the socket may be bound
573 * to any endpoint address, local or not.
574 */
575 if ((inp->inp_flags & INP_BINDANY) == 0 &&
576 ifa_ifwithaddr_check((struct sockaddr *)sin) == 0)
577 return (EADDRNOTAVAIL);
578 }
579 laddr = sin->sin_addr;
580 if (lport) {
581 struct inpcb *t;
582 struct tcptw *tw;
583
584 /* GROSS */
585 if (ntohs(lport) <= V_ipport_reservedhigh &&
586 ntohs(lport) >= V_ipport_reservedlow &&
587 priv_check_cred(cred, PRIV_NETINET_RESERVEDPORT,
588 0))
589 return (EACCES);
590 if (!IN_MULTICAST(ntohl(sin->sin_addr.s_addr)) &&
591 priv_check_cred(inp->inp_cred,
592 PRIV_NETINET_REUSEPORT, 0) != 0) {
593 t = in_pcblookup_local(pcbinfo, sin->sin_addr,
594 lport, INPLOOKUP_WILDCARD, cred);
595 /*
596 * XXX
597 * This entire block sorely needs a rewrite.
598 */
599 if (t &&
600 ((t->inp_flags & INP_TIMEWAIT) == 0) &&
601 (so->so_type != SOCK_STREAM ||
602 ntohl(t->inp_faddr.s_addr) == INADDR_ANY) &&
603 (ntohl(sin->sin_addr.s_addr) != INADDR_ANY ||
604 ntohl(t->inp_laddr.s_addr) != INADDR_ANY ||
605 (t->inp_flags2 & INP_REUSEPORT) == 0) &&
606 (inp->inp_cred->cr_uid !=
607 t->inp_cred->cr_uid))
608 return (EADDRINUSE);
609 }
610 t = in_pcblookup_local(pcbinfo, sin->sin_addr,
611 lport, lookupflags, cred);
612 if (t && (t->inp_flags & INP_TIMEWAIT)) {
613 /*
614 * XXXRW: If an incpb has had its timewait
615 * state recycled, we treat the address as
616 * being in use (for now). This is better
617 * than a panic, but not desirable.
618 */
619 tw = intotw(t);
620 if (tw == NULL ||
621 (reuseport & tw->tw_so_options) == 0)
622 return (EADDRINUSE);
623 } else if (t && (reuseport & inp_so_options(t)) == 0) {
624 #ifdef INET6
625 if (ntohl(sin->sin_addr.s_addr) !=
626 INADDR_ANY ||
627 ntohl(t->inp_laddr.s_addr) !=
628 INADDR_ANY ||
629 (inp->inp_vflag & INP_IPV6PROTO) == 0 ||
630 (t->inp_vflag & INP_IPV6PROTO) == 0)
631 #endif
632 return (EADDRINUSE);
633 }
634 }
635 }
636 if (*lportp != 0)
637 lport = *lportp;
638 if (lport == 0) {
639 error = in_pcb_lport(inp, &laddr, &lport, cred, lookupflags);
640 if (error != 0)
641 return (error);
642
643 }
644 *laddrp = laddr.s_addr;
645 *lportp = lport;
646 return (0);
647 }
648
649 /*
650 * Connect from a socket to a specified address.
651 * Both address and port must be specified in argument sin.
652 * If don't have a local address for this socket yet,
653 * then pick one.
654 */
655 int
656 in_pcbconnect_mbuf(struct inpcb *inp, struct sockaddr *nam,
657 struct ucred *cred, struct mbuf *m)
658 {
659 u_short lport, fport;
660 in_addr_t laddr, faddr;
661 int anonport, error;
662
663 INP_WLOCK_ASSERT(inp);
664 INP_HASH_WLOCK_ASSERT(inp->inp_pcbinfo);
665
666 lport = inp->inp_lport;
667 laddr = inp->inp_laddr.s_addr;
668 anonport = (lport == 0);
669 error = in_pcbconnect_setup(inp, nam, &laddr, &lport, &faddr, &fport,
670 NULL, cred);
671 if (error)
672 return (error);
673
674 /* Do the initial binding of the local address if required. */
675 if (inp->inp_laddr.s_addr == INADDR_ANY && inp->inp_lport == 0) {
676 inp->inp_lport = lport;
677 inp->inp_laddr.s_addr = laddr;
678 if (in_pcbinshash(inp) != 0) {
679 inp->inp_laddr.s_addr = INADDR_ANY;
680 inp->inp_lport = 0;
681 return (EAGAIN);
682 }
683 }
684
685 /* Commit the remaining changes. */
686 inp->inp_lport = lport;
687 inp->inp_laddr.s_addr = laddr;
688 inp->inp_faddr.s_addr = faddr;
689 inp->inp_fport = fport;
690 in_pcbrehash_mbuf(inp, m);
691
692 if (anonport)
693 inp->inp_flags |= INP_ANONPORT;
694 return (0);
695 }
696
697 int
698 in_pcbconnect(struct inpcb *inp, struct sockaddr *nam, struct ucred *cred)
699 {
700
701 return (in_pcbconnect_mbuf(inp, nam, cred, NULL));
702 }
703
704 /*
705 * Do proper source address selection on an unbound socket in case
706 * of connect. Take jails into account as well.
707 */
708 int
709 in_pcbladdr(struct inpcb *inp, struct in_addr *faddr, struct in_addr *laddr,
710 struct ucred *cred)
711 {
712 struct ifaddr *ifa;
713 struct sockaddr *sa;
714 struct sockaddr_in *sin;
715 struct route sro;
716 int error;
717
718 KASSERT(laddr != NULL, ("%s: laddr NULL", __func__));
719
720 /*
721 * Bypass source address selection and use the primary jail IP
722 * if requested.
723 */
724 if (cred != NULL && !prison_saddrsel_ip4(cred, laddr))
725 return (0);
726
727 error = 0;
728 bzero(&sro, sizeof(sro));
729
730 sin = (struct sockaddr_in *)&sro.ro_dst;
731 sin->sin_family = AF_INET;
732 sin->sin_len = sizeof(struct sockaddr_in);
733 sin->sin_addr.s_addr = faddr->s_addr;
734
735 /*
736 * If route is known our src addr is taken from the i/f,
737 * else punt.
738 *
739 * Find out route to destination.
740 */
741 if ((inp->inp_socket->so_options & SO_DONTROUTE) == 0)
742 in_rtalloc_ign(&sro, 0, inp->inp_inc.inc_fibnum);
743
744 /*
745 * If we found a route, use the address corresponding to
746 * the outgoing interface.
747 *
748 * Otherwise assume faddr is reachable on a directly connected
749 * network and try to find a corresponding interface to take
750 * the source address from.
751 */
752 if (sro.ro_rt == NULL || sro.ro_rt->rt_ifp == NULL) {
753 struct in_ifaddr *ia;
754 struct ifnet *ifp;
755
756 ia = ifatoia(ifa_ifwithdstaddr((struct sockaddr *)sin));
757 if (ia == NULL)
758 ia = ifatoia(ifa_ifwithnet((struct sockaddr *)sin, 0));
759 if (ia == NULL) {
760 error = ENETUNREACH;
761 goto done;
762 }
763
764 if (cred == NULL || !prison_flag(cred, PR_IP4)) {
765 laddr->s_addr = ia->ia_addr.sin_addr.s_addr;
766 ifa_free(&ia->ia_ifa);
767 goto done;
768 }
769
770 ifp = ia->ia_ifp;
771 ifa_free(&ia->ia_ifa);
772 ia = NULL;
773 IF_ADDR_RLOCK(ifp);
774 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
775
776 sa = ifa->ifa_addr;
777 if (sa->sa_family != AF_INET)
778 continue;
779 sin = (struct sockaddr_in *)sa;
780 if (prison_check_ip4(cred, &sin->sin_addr) == 0) {
781 ia = (struct in_ifaddr *)ifa;
782 break;
783 }
784 }
785 if (ia != NULL) {
786 laddr->s_addr = ia->ia_addr.sin_addr.s_addr;
787 IF_ADDR_RUNLOCK(ifp);
788 goto done;
789 }
790 IF_ADDR_RUNLOCK(ifp);
791
792 /* 3. As a last resort return the 'default' jail address. */
793 error = prison_get_ip4(cred, laddr);
794 goto done;
795 }
796
797 /*
798 * If the outgoing interface on the route found is not
799 * a loopback interface, use the address from that interface.
800 * In case of jails do those three steps:
801 * 1. check if the interface address belongs to the jail. If so use it.
802 * 2. check if we have any address on the outgoing interface
803 * belonging to this jail. If so use it.
804 * 3. as a last resort return the 'default' jail address.
805 */
806 if ((sro.ro_rt->rt_ifp->if_flags & IFF_LOOPBACK) == 0) {
807 struct in_ifaddr *ia;
808 struct ifnet *ifp;
809
810 /* If not jailed, use the default returned. */
811 if (cred == NULL || !prison_flag(cred, PR_IP4)) {
812 ia = (struct in_ifaddr *)sro.ro_rt->rt_ifa;
813 laddr->s_addr = ia->ia_addr.sin_addr.s_addr;
814 goto done;
815 }
816
817 /* Jailed. */
818 /* 1. Check if the iface address belongs to the jail. */
819 sin = (struct sockaddr_in *)sro.ro_rt->rt_ifa->ifa_addr;
820 if (prison_check_ip4(cred, &sin->sin_addr) == 0) {
821 ia = (struct in_ifaddr *)sro.ro_rt->rt_ifa;
822 laddr->s_addr = ia->ia_addr.sin_addr.s_addr;
823 goto done;
824 }
825
826 /*
827 * 2. Check if we have any address on the outgoing interface
828 * belonging to this jail.
829 */
830 ia = NULL;
831 ifp = sro.ro_rt->rt_ifp;
832 IF_ADDR_RLOCK(ifp);
833 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
834 sa = ifa->ifa_addr;
835 if (sa->sa_family != AF_INET)
836 continue;
837 sin = (struct sockaddr_in *)sa;
838 if (prison_check_ip4(cred, &sin->sin_addr) == 0) {
839 ia = (struct in_ifaddr *)ifa;
840 break;
841 }
842 }
843 if (ia != NULL) {
844 laddr->s_addr = ia->ia_addr.sin_addr.s_addr;
845 IF_ADDR_RUNLOCK(ifp);
846 goto done;
847 }
848 IF_ADDR_RUNLOCK(ifp);
849
850 /* 3. As a last resort return the 'default' jail address. */
851 error = prison_get_ip4(cred, laddr);
852 goto done;
853 }
854
855 /*
856 * The outgoing interface is marked with 'loopback net', so a route
857 * to ourselves is here.
858 * Try to find the interface of the destination address and then
859 * take the address from there. That interface is not necessarily
860 * a loopback interface.
861 * In case of jails, check that it is an address of the jail
862 * and if we cannot find, fall back to the 'default' jail address.
863 */
864 if ((sro.ro_rt->rt_ifp->if_flags & IFF_LOOPBACK) != 0) {
865 struct sockaddr_in sain;
866 struct in_ifaddr *ia;
867
868 bzero(&sain, sizeof(struct sockaddr_in));
869 sain.sin_family = AF_INET;
870 sain.sin_len = sizeof(struct sockaddr_in);
871 sain.sin_addr.s_addr = faddr->s_addr;
872
873 ia = ifatoia(ifa_ifwithdstaddr(sintosa(&sain)));
874 if (ia == NULL)
875 ia = ifatoia(ifa_ifwithnet(sintosa(&sain), 0));
876 if (ia == NULL)
877 ia = ifatoia(ifa_ifwithaddr(sintosa(&sain)));
878
879 if (cred == NULL || !prison_flag(cred, PR_IP4)) {
880 if (ia == NULL) {
881 error = ENETUNREACH;
882 goto done;
883 }
884 laddr->s_addr = ia->ia_addr.sin_addr.s_addr;
885 ifa_free(&ia->ia_ifa);
886 goto done;
887 }
888
889 /* Jailed. */
890 if (ia != NULL) {
891 struct ifnet *ifp;
892
893 ifp = ia->ia_ifp;
894 ifa_free(&ia->ia_ifa);
895 ia = NULL;
896 IF_ADDR_RLOCK(ifp);
897 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
898
899 sa = ifa->ifa_addr;
900 if (sa->sa_family != AF_INET)
901 continue;
902 sin = (struct sockaddr_in *)sa;
903 if (prison_check_ip4(cred,
904 &sin->sin_addr) == 0) {
905 ia = (struct in_ifaddr *)ifa;
906 break;
907 }
908 }
909 if (ia != NULL) {
910 laddr->s_addr = ia->ia_addr.sin_addr.s_addr;
911 IF_ADDR_RUNLOCK(ifp);
912 goto done;
913 }
914 IF_ADDR_RUNLOCK(ifp);
915 }
916
917 /* 3. As a last resort return the 'default' jail address. */
918 error = prison_get_ip4(cred, laddr);
919 goto done;
920 }
921
922 done:
923 if (sro.ro_rt != NULL)
924 RTFREE(sro.ro_rt);
925 return (error);
926 }
927
928 /*
929 * Set up for a connect from a socket to the specified address.
930 * On entry, *laddrp and *lportp should contain the current local
931 * address and port for the PCB; these are updated to the values
932 * that should be placed in inp_laddr and inp_lport to complete
933 * the connect.
934 *
935 * On success, *faddrp and *fportp will be set to the remote address
936 * and port. These are not updated in the error case.
937 *
938 * If the operation fails because the connection already exists,
939 * *oinpp will be set to the PCB of that connection so that the
940 * caller can decide to override it. In all other cases, *oinpp
941 * is set to NULL.
942 */
943 int
944 in_pcbconnect_setup(struct inpcb *inp, struct sockaddr *nam,
945 in_addr_t *laddrp, u_short *lportp, in_addr_t *faddrp, u_short *fportp,
946 struct inpcb **oinpp, struct ucred *cred)
947 {
948 struct sockaddr_in *sin = (struct sockaddr_in *)nam;
949 struct in_ifaddr *ia;
950 struct inpcb *oinp;
951 struct in_addr laddr, faddr;
952 u_short lport, fport;
953 int error;
954
955 /*
956 * Because a global state change doesn't actually occur here, a read
957 * lock is sufficient.
958 */
959 INP_LOCK_ASSERT(inp);
960 INP_HASH_LOCK_ASSERT(inp->inp_pcbinfo);
961
962 if (oinpp != NULL)
963 *oinpp = NULL;
964 if (nam->sa_len != sizeof (*sin))
965 return (EINVAL);
966 if (sin->sin_family != AF_INET)
967 return (EAFNOSUPPORT);
968 if (sin->sin_port == 0)
969 return (EADDRNOTAVAIL);
970 laddr.s_addr = *laddrp;
971 lport = *lportp;
972 faddr = sin->sin_addr;
973 fport = sin->sin_port;
974
975 if (!TAILQ_EMPTY(&V_in_ifaddrhead)) {
976 /*
977 * If the destination address is INADDR_ANY,
978 * use the primary local address.
979 * If the supplied address is INADDR_BROADCAST,
980 * and the primary interface supports broadcast,
981 * choose the broadcast address for that interface.
982 */
983 if (faddr.s_addr == INADDR_ANY) {
984 IN_IFADDR_RLOCK();
985 faddr =
986 IA_SIN(TAILQ_FIRST(&V_in_ifaddrhead))->sin_addr;
987 IN_IFADDR_RUNLOCK();
988 if (cred != NULL &&
989 (error = prison_get_ip4(cred, &faddr)) != 0)
990 return (error);
991 } else if (faddr.s_addr == (u_long)INADDR_BROADCAST) {
992 IN_IFADDR_RLOCK();
993 if (TAILQ_FIRST(&V_in_ifaddrhead)->ia_ifp->if_flags &
994 IFF_BROADCAST)
995 faddr = satosin(&TAILQ_FIRST(
996 &V_in_ifaddrhead)->ia_broadaddr)->sin_addr;
997 IN_IFADDR_RUNLOCK();
998 }
999 }
1000 if (laddr.s_addr == INADDR_ANY) {
1001 error = in_pcbladdr(inp, &faddr, &laddr, cred);
1002 /*
1003 * If the destination address is multicast and an outgoing
1004 * interface has been set as a multicast option, prefer the
1005 * address of that interface as our source address.
1006 */
1007 if (IN_MULTICAST(ntohl(faddr.s_addr)) &&
1008 inp->inp_moptions != NULL) {
1009 struct ip_moptions *imo;
1010 struct ifnet *ifp;
1011
1012 imo = inp->inp_moptions;
1013 if (imo->imo_multicast_ifp != NULL) {
1014 ifp = imo->imo_multicast_ifp;
1015 IN_IFADDR_RLOCK();
1016 TAILQ_FOREACH(ia, &V_in_ifaddrhead, ia_link) {
1017 if ((ia->ia_ifp == ifp) &&
1018 (cred == NULL ||
1019 prison_check_ip4(cred,
1020 &ia->ia_addr.sin_addr) == 0))
1021 break;
1022 }
1023 if (ia == NULL)
1024 error = EADDRNOTAVAIL;
1025 else {
1026 laddr = ia->ia_addr.sin_addr;
1027 error = 0;
1028 }
1029 IN_IFADDR_RUNLOCK();
1030 }
1031 }
1032 if (error)
1033 return (error);
1034 }
1035 oinp = in_pcblookup_hash_locked(inp->inp_pcbinfo, faddr, fport,
1036 laddr, lport, 0, NULL);
1037 if (oinp != NULL) {
1038 if (oinpp != NULL)
1039 *oinpp = oinp;
1040 return (EADDRINUSE);
1041 }
1042 if (lport == 0) {
1043 error = in_pcbbind_setup(inp, NULL, &laddr.s_addr, &lport,
1044 cred);
1045 if (error)
1046 return (error);
1047 }
1048 *laddrp = laddr.s_addr;
1049 *lportp = lport;
1050 *faddrp = faddr.s_addr;
1051 *fportp = fport;
1052 return (0);
1053 }
1054
1055 void
1056 in_pcbdisconnect(struct inpcb *inp)
1057 {
1058
1059 INP_WLOCK_ASSERT(inp);
1060 INP_HASH_WLOCK_ASSERT(inp->inp_pcbinfo);
1061
1062 inp->inp_faddr.s_addr = INADDR_ANY;
1063 inp->inp_fport = 0;
1064 in_pcbrehash(inp);
1065 }
1066 #endif /* INET */
1067
1068 /*
1069 * in_pcbdetach() is responsibe for disassociating a socket from an inpcb.
1070 * For most protocols, this will be invoked immediately prior to calling
1071 * in_pcbfree(). However, with TCP the inpcb may significantly outlive the
1072 * socket, in which case in_pcbfree() is deferred.
1073 */
1074 void
1075 in_pcbdetach(struct inpcb *inp)
1076 {
1077
1078 KASSERT(inp->inp_socket != NULL, ("%s: inp_socket == NULL", __func__));
1079
1080 inp->inp_socket->so_pcb = NULL;
1081 inp->inp_socket = NULL;
1082 }
1083
1084 /*
1085 * in_pcbref() bumps the reference count on an inpcb in order to maintain
1086 * stability of an inpcb pointer despite the inpcb lock being released. This
1087 * is used in TCP when the inpcbinfo lock needs to be acquired or upgraded,
1088 * but where the inpcb lock may already held, or when acquiring a reference
1089 * via a pcbgroup.
1090 *
1091 * in_pcbref() should be used only to provide brief memory stability, and
1092 * must always be followed by a call to INP_WLOCK() and in_pcbrele() to
1093 * garbage collect the inpcb if it has been in_pcbfree()'d from another
1094 * context. Until in_pcbrele() has returned that the inpcb is still valid,
1095 * lock and rele are the *only* safe operations that may be performed on the
1096 * inpcb.
1097 *
1098 * While the inpcb will not be freed, releasing the inpcb lock means that the
1099 * connection's state may change, so the caller should be careful to
1100 * revalidate any cached state on reacquiring the lock. Drop the reference
1101 * using in_pcbrele().
1102 */
1103 void
1104 in_pcbref(struct inpcb *inp)
1105 {
1106
1107 KASSERT(inp->inp_refcount > 0, ("%s: refcount 0", __func__));
1108
1109 refcount_acquire(&inp->inp_refcount);
1110 }
1111
1112 /*
1113 * Drop a refcount on an inpcb elevated using in_pcbref(); because a call to
1114 * in_pcbfree() may have been made between in_pcbref() and in_pcbrele(), we
1115 * return a flag indicating whether or not the inpcb remains valid. If it is
1116 * valid, we return with the inpcb lock held.
1117 *
1118 * Notice that, unlike in_pcbref(), the inpcb lock must be held to drop a
1119 * reference on an inpcb. Historically more work was done here (actually, in
1120 * in_pcbfree_internal()) but has been moved to in_pcbfree() to avoid the
1121 * need for the pcbinfo lock in in_pcbrele(). Deferring the free is entirely
1122 * about memory stability (and continued use of the write lock).
1123 */
1124 int
1125 in_pcbrele_rlocked(struct inpcb *inp)
1126 {
1127 struct inpcbinfo *pcbinfo;
1128
1129 KASSERT(inp->inp_refcount > 0, ("%s: refcount 0", __func__));
1130
1131 INP_RLOCK_ASSERT(inp);
1132
1133 if (refcount_release(&inp->inp_refcount) == 0) {
1134 /*
1135 * If the inpcb has been freed, let the caller know, even if
1136 * this isn't the last reference.
1137 */
1138 if (inp->inp_flags2 & INP_FREED) {
1139 INP_RUNLOCK(inp);
1140 return (1);
1141 }
1142 return (0);
1143 }
1144
1145 KASSERT(inp->inp_socket == NULL, ("%s: inp_socket != NULL", __func__));
1146
1147 INP_RUNLOCK(inp);
1148 pcbinfo = inp->inp_pcbinfo;
1149 uma_zfree(pcbinfo->ipi_zone, inp);
1150 return (1);
1151 }
1152
1153 int
1154 in_pcbrele_wlocked(struct inpcb *inp)
1155 {
1156 struct inpcbinfo *pcbinfo;
1157
1158 KASSERT(inp->inp_refcount > 0, ("%s: refcount 0", __func__));
1159
1160 INP_WLOCK_ASSERT(inp);
1161
1162 if (refcount_release(&inp->inp_refcount) == 0) {
1163 /*
1164 * If the inpcb has been freed, let the caller know, even if
1165 * this isn't the last reference.
1166 */
1167 if (inp->inp_flags2 & INP_FREED) {
1168 INP_WUNLOCK(inp);
1169 return (1);
1170 }
1171 return (0);
1172 }
1173
1174 KASSERT(inp->inp_socket == NULL, ("%s: inp_socket != NULL", __func__));
1175
1176 INP_WUNLOCK(inp);
1177 pcbinfo = inp->inp_pcbinfo;
1178 uma_zfree(pcbinfo->ipi_zone, inp);
1179 return (1);
1180 }
1181
1182 /*
1183 * Temporary wrapper.
1184 */
1185 int
1186 in_pcbrele(struct inpcb *inp)
1187 {
1188
1189 return (in_pcbrele_wlocked(inp));
1190 }
1191
1192 /*
1193 * Unconditionally schedule an inpcb to be freed by decrementing its
1194 * reference count, which should occur only after the inpcb has been detached
1195 * from its socket. If another thread holds a temporary reference (acquired
1196 * using in_pcbref()) then the free is deferred until that reference is
1197 * released using in_pcbrele(), but the inpcb is still unlocked. Almost all
1198 * work, including removal from global lists, is done in this context, where
1199 * the pcbinfo lock is held.
1200 */
1201 void
1202 in_pcbfree(struct inpcb *inp)
1203 {
1204 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
1205
1206 KASSERT(inp->inp_socket == NULL, ("%s: inp_socket != NULL", __func__));
1207
1208 #ifdef INVARIANTS
1209 if (pcbinfo == &V_tcbinfo) {
1210 INP_INFO_LOCK_ASSERT(pcbinfo);
1211 } else {
1212 INP_INFO_WLOCK_ASSERT(pcbinfo);
1213 }
1214 #endif
1215 INP_WLOCK_ASSERT(inp);
1216
1217 /* XXXRW: Do as much as possible here. */
1218 #ifdef IPSEC
1219 if (inp->inp_sp != NULL)
1220 ipsec_delete_pcbpolicy(inp);
1221 #endif
1222 INP_LIST_WLOCK(pcbinfo);
1223 inp->inp_gencnt = ++pcbinfo->ipi_gencnt;
1224 in_pcbremlists(inp);
1225 INP_LIST_WUNLOCK(pcbinfo);
1226 #ifdef INET6
1227 if (inp->inp_vflag & INP_IPV6PROTO) {
1228 ip6_freepcbopts(inp->in6p_outputopts);
1229 if (inp->in6p_moptions != NULL)
1230 ip6_freemoptions(inp->in6p_moptions);
1231 }
1232 #endif
1233 if (inp->inp_options)
1234 (void)m_free(inp->inp_options);
1235 #ifdef INET
1236 if (inp->inp_moptions != NULL)
1237 inp_freemoptions(inp->inp_moptions);
1238 #endif
1239 inp->inp_vflag = 0;
1240 inp->inp_flags2 |= INP_FREED;
1241 crfree(inp->inp_cred);
1242 #ifdef MAC
1243 mac_inpcb_destroy(inp);
1244 #endif
1245 if (!in_pcbrele_wlocked(inp))
1246 INP_WUNLOCK(inp);
1247 }
1248
1249 /*
1250 * in_pcbdrop() removes an inpcb from hashed lists, releasing its address and
1251 * port reservation, and preventing it from being returned by inpcb lookups.
1252 *
1253 * It is used by TCP to mark an inpcb as unused and avoid future packet
1254 * delivery or event notification when a socket remains open but TCP has
1255 * closed. This might occur as a result of a shutdown()-initiated TCP close
1256 * or a RST on the wire, and allows the port binding to be reused while still
1257 * maintaining the invariant that so_pcb always points to a valid inpcb until
1258 * in_pcbdetach().
1259 *
1260 * XXXRW: Possibly in_pcbdrop() should also prevent future notifications by
1261 * in_pcbnotifyall() and in_pcbpurgeif0()?
1262 */
1263 void
1264 in_pcbdrop(struct inpcb *inp)
1265 {
1266
1267 INP_WLOCK_ASSERT(inp);
1268
1269 /*
1270 * XXXRW: Possibly we should protect the setting of INP_DROPPED with
1271 * the hash lock...?
1272 */
1273 inp->inp_flags |= INP_DROPPED;
1274 if (inp->inp_flags & INP_INHASHLIST) {
1275 struct inpcbport *phd = inp->inp_phd;
1276
1277 INP_HASH_WLOCK(inp->inp_pcbinfo);
1278 LIST_REMOVE(inp, inp_hash);
1279 LIST_REMOVE(inp, inp_portlist);
1280 if (LIST_FIRST(&phd->phd_pcblist) == NULL) {
1281 LIST_REMOVE(phd, phd_hash);
1282 free(phd, M_PCB);
1283 }
1284 INP_HASH_WUNLOCK(inp->inp_pcbinfo);
1285 inp->inp_flags &= ~INP_INHASHLIST;
1286 #ifdef PCBGROUP
1287 in_pcbgroup_remove(inp);
1288 #endif
1289 }
1290 }
1291
1292 #ifdef INET
1293 /*
1294 * Common routines to return the socket addresses associated with inpcbs.
1295 */
1296 struct sockaddr *
1297 in_sockaddr(in_port_t port, struct in_addr *addr_p)
1298 {
1299 struct sockaddr_in *sin;
1300
1301 sin = malloc(sizeof *sin, M_SONAME,
1302 M_WAITOK | M_ZERO);
1303 sin->sin_family = AF_INET;
1304 sin->sin_len = sizeof(*sin);
1305 sin->sin_addr = *addr_p;
1306 sin->sin_port = port;
1307
1308 return (struct sockaddr *)sin;
1309 }
1310
1311 int
1312 in_getsockaddr(struct socket *so, struct sockaddr **nam)
1313 {
1314 struct inpcb *inp;
1315 struct in_addr addr;
1316 in_port_t port;
1317
1318 inp = sotoinpcb(so);
1319 KASSERT(inp != NULL, ("in_getsockaddr: inp == NULL"));
1320
1321 INP_RLOCK(inp);
1322 port = inp->inp_lport;
1323 addr = inp->inp_laddr;
1324 INP_RUNLOCK(inp);
1325
1326 *nam = in_sockaddr(port, &addr);
1327 return 0;
1328 }
1329
1330 int
1331 in_getpeeraddr(struct socket *so, struct sockaddr **nam)
1332 {
1333 struct inpcb *inp;
1334 struct in_addr addr;
1335 in_port_t port;
1336
1337 inp = sotoinpcb(so);
1338 KASSERT(inp != NULL, ("in_getpeeraddr: inp == NULL"));
1339
1340 INP_RLOCK(inp);
1341 port = inp->inp_fport;
1342 addr = inp->inp_faddr;
1343 INP_RUNLOCK(inp);
1344
1345 *nam = in_sockaddr(port, &addr);
1346 return 0;
1347 }
1348
1349 void
1350 in_pcbnotifyall(struct inpcbinfo *pcbinfo, struct in_addr faddr, int errno,
1351 struct inpcb *(*notify)(struct inpcb *, int))
1352 {
1353 struct inpcb *inp, *inp_temp;
1354
1355 INP_INFO_WLOCK(pcbinfo);
1356 LIST_FOREACH_SAFE(inp, pcbinfo->ipi_listhead, inp_list, inp_temp) {
1357 INP_WLOCK(inp);
1358 #ifdef INET6
1359 if ((inp->inp_vflag & INP_IPV4) == 0) {
1360 INP_WUNLOCK(inp);
1361 continue;
1362 }
1363 #endif
1364 if (inp->inp_faddr.s_addr != faddr.s_addr ||
1365 inp->inp_socket == NULL) {
1366 INP_WUNLOCK(inp);
1367 continue;
1368 }
1369 if ((*notify)(inp, errno))
1370 INP_WUNLOCK(inp);
1371 }
1372 INP_INFO_WUNLOCK(pcbinfo);
1373 }
1374
1375 void
1376 in_pcbpurgeif0(struct inpcbinfo *pcbinfo, struct ifnet *ifp)
1377 {
1378 struct inpcb *inp;
1379 struct ip_moptions *imo;
1380 int i, gap;
1381
1382 INP_INFO_WLOCK(pcbinfo);
1383 LIST_FOREACH(inp, pcbinfo->ipi_listhead, inp_list) {
1384 INP_WLOCK(inp);
1385 imo = inp->inp_moptions;
1386 if ((inp->inp_vflag & INP_IPV4) &&
1387 imo != NULL) {
1388 /*
1389 * Unselect the outgoing interface if it is being
1390 * detached.
1391 */
1392 if (imo->imo_multicast_ifp == ifp)
1393 imo->imo_multicast_ifp = NULL;
1394
1395 /*
1396 * Drop multicast group membership if we joined
1397 * through the interface being detached.
1398 */
1399 for (i = 0, gap = 0; i < imo->imo_num_memberships;
1400 i++) {
1401 if (imo->imo_membership[i]->inm_ifp == ifp) {
1402 in_delmulti(imo->imo_membership[i]);
1403 gap++;
1404 } else if (gap != 0)
1405 imo->imo_membership[i - gap] =
1406 imo->imo_membership[i];
1407 }
1408 imo->imo_num_memberships -= gap;
1409 }
1410 INP_WUNLOCK(inp);
1411 }
1412 INP_INFO_WUNLOCK(pcbinfo);
1413 }
1414
1415 /*
1416 * Lookup a PCB based on the local address and port. Caller must hold the
1417 * hash lock. No inpcb locks or references are acquired.
1418 */
1419 #define INP_LOOKUP_MAPPED_PCB_COST 3
1420 struct inpcb *
1421 in_pcblookup_local(struct inpcbinfo *pcbinfo, struct in_addr laddr,
1422 u_short lport, int lookupflags, struct ucred *cred)
1423 {
1424 struct inpcb *inp;
1425 #ifdef INET6
1426 int matchwild = 3 + INP_LOOKUP_MAPPED_PCB_COST;
1427 #else
1428 int matchwild = 3;
1429 #endif
1430 int wildcard;
1431
1432 KASSERT((lookupflags & ~(INPLOOKUP_WILDCARD)) == 0,
1433 ("%s: invalid lookup flags %d", __func__, lookupflags));
1434
1435 INP_HASH_LOCK_ASSERT(pcbinfo);
1436
1437 if ((lookupflags & INPLOOKUP_WILDCARD) == 0) {
1438 struct inpcbhead *head;
1439 /*
1440 * Look for an unconnected (wildcard foreign addr) PCB that
1441 * matches the local address and port we're looking for.
1442 */
1443 head = &pcbinfo->ipi_hashbase[INP_PCBHASH(INADDR_ANY, lport,
1444 0, pcbinfo->ipi_hashmask)];
1445 LIST_FOREACH(inp, head, inp_hash) {
1446 #ifdef INET6
1447 /* XXX inp locking */
1448 if ((inp->inp_vflag & INP_IPV4) == 0)
1449 continue;
1450 #endif
1451 if (inp->inp_faddr.s_addr == INADDR_ANY &&
1452 inp->inp_laddr.s_addr == laddr.s_addr &&
1453 inp->inp_lport == lport) {
1454 /*
1455 * Found?
1456 */
1457 if (cred == NULL ||
1458 prison_equal_ip4(cred->cr_prison,
1459 inp->inp_cred->cr_prison))
1460 return (inp);
1461 }
1462 }
1463 /*
1464 * Not found.
1465 */
1466 return (NULL);
1467 } else {
1468 struct inpcbporthead *porthash;
1469 struct inpcbport *phd;
1470 struct inpcb *match = NULL;
1471 /*
1472 * Best fit PCB lookup.
1473 *
1474 * First see if this local port is in use by looking on the
1475 * port hash list.
1476 */
1477 porthash = &pcbinfo->ipi_porthashbase[INP_PCBPORTHASH(lport,
1478 pcbinfo->ipi_porthashmask)];
1479 LIST_FOREACH(phd, porthash, phd_hash) {
1480 if (phd->phd_port == lport)
1481 break;
1482 }
1483 if (phd != NULL) {
1484 /*
1485 * Port is in use by one or more PCBs. Look for best
1486 * fit.
1487 */
1488 LIST_FOREACH(inp, &phd->phd_pcblist, inp_portlist) {
1489 wildcard = 0;
1490 if (cred != NULL &&
1491 !prison_equal_ip4(inp->inp_cred->cr_prison,
1492 cred->cr_prison))
1493 continue;
1494 #ifdef INET6
1495 /* XXX inp locking */
1496 if ((inp->inp_vflag & INP_IPV4) == 0)
1497 continue;
1498 /*
1499 * We never select the PCB that has
1500 * INP_IPV6 flag and is bound to :: if
1501 * we have another PCB which is bound
1502 * to 0.0.0.0. If a PCB has the
1503 * INP_IPV6 flag, then we set its cost
1504 * higher than IPv4 only PCBs.
1505 *
1506 * Note that the case only happens
1507 * when a socket is bound to ::, under
1508 * the condition that the use of the
1509 * mapped address is allowed.
1510 */
1511 if ((inp->inp_vflag & INP_IPV6) != 0)
1512 wildcard += INP_LOOKUP_MAPPED_PCB_COST;
1513 #endif
1514 if (inp->inp_faddr.s_addr != INADDR_ANY)
1515 wildcard++;
1516 if (inp->inp_laddr.s_addr != INADDR_ANY) {
1517 if (laddr.s_addr == INADDR_ANY)
1518 wildcard++;
1519 else if (inp->inp_laddr.s_addr != laddr.s_addr)
1520 continue;
1521 } else {
1522 if (laddr.s_addr != INADDR_ANY)
1523 wildcard++;
1524 }
1525 if (wildcard < matchwild) {
1526 match = inp;
1527 matchwild = wildcard;
1528 if (matchwild == 0)
1529 break;
1530 }
1531 }
1532 }
1533 return (match);
1534 }
1535 }
1536 #undef INP_LOOKUP_MAPPED_PCB_COST
1537
1538 #ifdef PCBGROUP
1539 /*
1540 * Lookup PCB in hash list, using pcbgroup tables.
1541 */
1542 static struct inpcb *
1543 in_pcblookup_group(struct inpcbinfo *pcbinfo, struct inpcbgroup *pcbgroup,
1544 struct in_addr faddr, u_int fport_arg, struct in_addr laddr,
1545 u_int lport_arg, int lookupflags, struct ifnet *ifp)
1546 {
1547 struct inpcbhead *head;
1548 struct inpcb *inp, *tmpinp;
1549 u_short fport = fport_arg, lport = lport_arg;
1550
1551 /*
1552 * First look for an exact match.
1553 */
1554 tmpinp = NULL;
1555 INP_GROUP_LOCK(pcbgroup);
1556 head = &pcbgroup->ipg_hashbase[INP_PCBHASH(faddr.s_addr, lport, fport,
1557 pcbgroup->ipg_hashmask)];
1558 LIST_FOREACH(inp, head, inp_pcbgrouphash) {
1559 #ifdef INET6
1560 /* XXX inp locking */
1561 if ((inp->inp_vflag & INP_IPV4) == 0)
1562 continue;
1563 #endif
1564 if (inp->inp_faddr.s_addr == faddr.s_addr &&
1565 inp->inp_laddr.s_addr == laddr.s_addr &&
1566 inp->inp_fport == fport &&
1567 inp->inp_lport == lport) {
1568 /*
1569 * XXX We should be able to directly return
1570 * the inp here, without any checks.
1571 * Well unless both bound with SO_REUSEPORT?
1572 */
1573 if (prison_flag(inp->inp_cred, PR_IP4))
1574 goto found;
1575 if (tmpinp == NULL)
1576 tmpinp = inp;
1577 }
1578 }
1579 if (tmpinp != NULL) {
1580 inp = tmpinp;
1581 goto found;
1582 }
1583
1584 /*
1585 * Then look for a wildcard match, if requested.
1586 */
1587 if ((lookupflags & INPLOOKUP_WILDCARD) != 0) {
1588 struct inpcb *local_wild = NULL, *local_exact = NULL;
1589 #ifdef INET6
1590 struct inpcb *local_wild_mapped = NULL;
1591 #endif
1592 struct inpcb *jail_wild = NULL;
1593 struct inpcbhead *head;
1594 int injail;
1595
1596 /*
1597 * Order of socket selection - we always prefer jails.
1598 * 1. jailed, non-wild.
1599 * 2. jailed, wild.
1600 * 3. non-jailed, non-wild.
1601 * 4. non-jailed, wild.
1602 */
1603 head = &pcbinfo->ipi_wildbase[INP_PCBHASH(INADDR_ANY, lport,
1604 0, pcbinfo->ipi_wildmask)];
1605 LIST_FOREACH(inp, head, inp_pcbgroup_wild) {
1606 #ifdef INET6
1607 /* XXX inp locking */
1608 if ((inp->inp_vflag & INP_IPV4) == 0)
1609 continue;
1610 #endif
1611 if (inp->inp_faddr.s_addr != INADDR_ANY ||
1612 inp->inp_lport != lport)
1613 continue;
1614
1615 /* XXX inp locking */
1616 if (ifp && ifp->if_type == IFT_FAITH &&
1617 (inp->inp_flags & INP_FAITH) == 0)
1618 continue;
1619
1620 injail = prison_flag(inp->inp_cred, PR_IP4);
1621 if (injail) {
1622 if (prison_check_ip4(inp->inp_cred,
1623 &laddr) != 0)
1624 continue;
1625 } else {
1626 if (local_exact != NULL)
1627 continue;
1628 }
1629
1630 if (inp->inp_laddr.s_addr == laddr.s_addr) {
1631 if (injail)
1632 goto found;
1633 else
1634 local_exact = inp;
1635 } else if (inp->inp_laddr.s_addr == INADDR_ANY) {
1636 #ifdef INET6
1637 /* XXX inp locking, NULL check */
1638 if (inp->inp_vflag & INP_IPV6PROTO)
1639 local_wild_mapped = inp;
1640 else
1641 #endif
1642 if (injail)
1643 jail_wild = inp;
1644 else
1645 local_wild = inp;
1646 }
1647 } /* LIST_FOREACH */
1648 inp = jail_wild;
1649 if (inp == NULL)
1650 inp = local_exact;
1651 if (inp == NULL)
1652 inp = local_wild;
1653 #ifdef INET6
1654 if (inp == NULL)
1655 inp = local_wild_mapped;
1656 #endif
1657 if (inp != NULL)
1658 goto found;
1659 } /* if (lookupflags & INPLOOKUP_WILDCARD) */
1660 INP_GROUP_UNLOCK(pcbgroup);
1661 return (NULL);
1662
1663 found:
1664 in_pcbref(inp);
1665 INP_GROUP_UNLOCK(pcbgroup);
1666 if (lookupflags & INPLOOKUP_WLOCKPCB) {
1667 INP_WLOCK(inp);
1668 if (in_pcbrele_wlocked(inp))
1669 return (NULL);
1670 } else if (lookupflags & INPLOOKUP_RLOCKPCB) {
1671 INP_RLOCK(inp);
1672 if (in_pcbrele_rlocked(inp))
1673 return (NULL);
1674 } else
1675 panic("%s: locking bug", __func__);
1676 return (inp);
1677 }
1678 #endif /* PCBGROUP */
1679
1680 /*
1681 * Lookup PCB in hash list, using pcbinfo tables. This variation assumes
1682 * that the caller has locked the hash list, and will not perform any further
1683 * locking or reference operations on either the hash list or the connection.
1684 */
1685 static struct inpcb *
1686 in_pcblookup_hash_locked(struct inpcbinfo *pcbinfo, struct in_addr faddr,
1687 u_int fport_arg, struct in_addr laddr, u_int lport_arg, int lookupflags,
1688 struct ifnet *ifp)
1689 {
1690 struct inpcbhead *head;
1691 struct inpcb *inp, *tmpinp;
1692 u_short fport = fport_arg, lport = lport_arg;
1693
1694 KASSERT((lookupflags & ~(INPLOOKUP_WILDCARD)) == 0,
1695 ("%s: invalid lookup flags %d", __func__, lookupflags));
1696
1697 INP_HASH_LOCK_ASSERT(pcbinfo);
1698
1699 /*
1700 * First look for an exact match.
1701 */
1702 tmpinp = NULL;
1703 head = &pcbinfo->ipi_hashbase[INP_PCBHASH(faddr.s_addr, lport, fport,
1704 pcbinfo->ipi_hashmask)];
1705 LIST_FOREACH(inp, head, inp_hash) {
1706 #ifdef INET6
1707 /* XXX inp locking */
1708 if ((inp->inp_vflag & INP_IPV4) == 0)
1709 continue;
1710 #endif
1711 if (inp->inp_faddr.s_addr == faddr.s_addr &&
1712 inp->inp_laddr.s_addr == laddr.s_addr &&
1713 inp->inp_fport == fport &&
1714 inp->inp_lport == lport) {
1715 /*
1716 * XXX We should be able to directly return
1717 * the inp here, without any checks.
1718 * Well unless both bound with SO_REUSEPORT?
1719 */
1720 if (prison_flag(inp->inp_cred, PR_IP4))
1721 return (inp);
1722 if (tmpinp == NULL)
1723 tmpinp = inp;
1724 }
1725 }
1726 if (tmpinp != NULL)
1727 return (tmpinp);
1728
1729 /*
1730 * Then look for a wildcard match, if requested.
1731 */
1732 if ((lookupflags & INPLOOKUP_WILDCARD) != 0) {
1733 struct inpcb *local_wild = NULL, *local_exact = NULL;
1734 #ifdef INET6
1735 struct inpcb *local_wild_mapped = NULL;
1736 #endif
1737 struct inpcb *jail_wild = NULL;
1738 int injail;
1739
1740 /*
1741 * Order of socket selection - we always prefer jails.
1742 * 1. jailed, non-wild.
1743 * 2. jailed, wild.
1744 * 3. non-jailed, non-wild.
1745 * 4. non-jailed, wild.
1746 */
1747
1748 head = &pcbinfo->ipi_hashbase[INP_PCBHASH(INADDR_ANY, lport,
1749 0, pcbinfo->ipi_hashmask)];
1750 LIST_FOREACH(inp, head, inp_hash) {
1751 #ifdef INET6
1752 /* XXX inp locking */
1753 if ((inp->inp_vflag & INP_IPV4) == 0)
1754 continue;
1755 #endif
1756 if (inp->inp_faddr.s_addr != INADDR_ANY ||
1757 inp->inp_lport != lport)
1758 continue;
1759
1760 /* XXX inp locking */
1761 if (ifp && ifp->if_type == IFT_FAITH &&
1762 (inp->inp_flags & INP_FAITH) == 0)
1763 continue;
1764
1765 injail = prison_flag(inp->inp_cred, PR_IP4);
1766 if (injail) {
1767 if (prison_check_ip4(inp->inp_cred,
1768 &laddr) != 0)
1769 continue;
1770 } else {
1771 if (local_exact != NULL)
1772 continue;
1773 }
1774
1775 if (inp->inp_laddr.s_addr == laddr.s_addr) {
1776 if (injail)
1777 return (inp);
1778 else
1779 local_exact = inp;
1780 } else if (inp->inp_laddr.s_addr == INADDR_ANY) {
1781 #ifdef INET6
1782 /* XXX inp locking, NULL check */
1783 if (inp->inp_vflag & INP_IPV6PROTO)
1784 local_wild_mapped = inp;
1785 else
1786 #endif
1787 if (injail)
1788 jail_wild = inp;
1789 else
1790 local_wild = inp;
1791 }
1792 } /* LIST_FOREACH */
1793 if (jail_wild != NULL)
1794 return (jail_wild);
1795 if (local_exact != NULL)
1796 return (local_exact);
1797 if (local_wild != NULL)
1798 return (local_wild);
1799 #ifdef INET6
1800 if (local_wild_mapped != NULL)
1801 return (local_wild_mapped);
1802 #endif
1803 } /* if ((lookupflags & INPLOOKUP_WILDCARD) != 0) */
1804
1805 return (NULL);
1806 }
1807
1808 /*
1809 * Lookup PCB in hash list, using pcbinfo tables. This variation locks the
1810 * hash list lock, and will return the inpcb locked (i.e., requires
1811 * INPLOOKUP_LOCKPCB).
1812 */
1813 static struct inpcb *
1814 in_pcblookup_hash(struct inpcbinfo *pcbinfo, struct in_addr faddr,
1815 u_int fport, struct in_addr laddr, u_int lport, int lookupflags,
1816 struct ifnet *ifp)
1817 {
1818 struct inpcb *inp;
1819
1820 INP_HASH_RLOCK(pcbinfo);
1821 inp = in_pcblookup_hash_locked(pcbinfo, faddr, fport, laddr, lport,
1822 (lookupflags & ~(INPLOOKUP_RLOCKPCB | INPLOOKUP_WLOCKPCB)), ifp);
1823 if (inp != NULL) {
1824 in_pcbref(inp);
1825 INP_HASH_RUNLOCK(pcbinfo);
1826 if (lookupflags & INPLOOKUP_WLOCKPCB) {
1827 INP_WLOCK(inp);
1828 if (in_pcbrele_wlocked(inp))
1829 return (NULL);
1830 } else if (lookupflags & INPLOOKUP_RLOCKPCB) {
1831 INP_RLOCK(inp);
1832 if (in_pcbrele_rlocked(inp))
1833 return (NULL);
1834 } else
1835 panic("%s: locking bug", __func__);
1836 } else
1837 INP_HASH_RUNLOCK(pcbinfo);
1838 return (inp);
1839 }
1840
1841 /*
1842 * Public inpcb lookup routines, accepting a 4-tuple, and optionally, an mbuf
1843 * from which a pre-calculated hash value may be extracted.
1844 *
1845 * Possibly more of this logic should be in in_pcbgroup.c.
1846 */
1847 struct inpcb *
1848 in_pcblookup(struct inpcbinfo *pcbinfo, struct in_addr faddr, u_int fport,
1849 struct in_addr laddr, u_int lport, int lookupflags, struct ifnet *ifp)
1850 {
1851 #if defined(PCBGROUP)
1852 struct inpcbgroup *pcbgroup;
1853 #endif
1854
1855 KASSERT((lookupflags & ~INPLOOKUP_MASK) == 0,
1856 ("%s: invalid lookup flags %d", __func__, lookupflags));
1857 KASSERT((lookupflags & (INPLOOKUP_RLOCKPCB | INPLOOKUP_WLOCKPCB)) != 0,
1858 ("%s: LOCKPCB not set", __func__));
1859
1860 #if defined(PCBGROUP)
1861 if (in_pcbgroup_enabled(pcbinfo)) {
1862 pcbgroup = in_pcbgroup_bytuple(pcbinfo, laddr, lport, faddr,
1863 fport);
1864 return (in_pcblookup_group(pcbinfo, pcbgroup, faddr, fport,
1865 laddr, lport, lookupflags, ifp));
1866 }
1867 #endif
1868 return (in_pcblookup_hash(pcbinfo, faddr, fport, laddr, lport,
1869 lookupflags, ifp));
1870 }
1871
1872 struct inpcb *
1873 in_pcblookup_mbuf(struct inpcbinfo *pcbinfo, struct in_addr faddr,
1874 u_int fport, struct in_addr laddr, u_int lport, int lookupflags,
1875 struct ifnet *ifp, struct mbuf *m)
1876 {
1877 #ifdef PCBGROUP
1878 struct inpcbgroup *pcbgroup;
1879 #endif
1880
1881 KASSERT((lookupflags & ~INPLOOKUP_MASK) == 0,
1882 ("%s: invalid lookup flags %d", __func__, lookupflags));
1883 KASSERT((lookupflags & (INPLOOKUP_RLOCKPCB | INPLOOKUP_WLOCKPCB)) != 0,
1884 ("%s: LOCKPCB not set", __func__));
1885
1886 #ifdef PCBGROUP
1887 if (in_pcbgroup_enabled(pcbinfo)) {
1888 pcbgroup = in_pcbgroup_byhash(pcbinfo, M_HASHTYPE_GET(m),
1889 m->m_pkthdr.flowid);
1890 if (pcbgroup != NULL)
1891 return (in_pcblookup_group(pcbinfo, pcbgroup, faddr,
1892 fport, laddr, lport, lookupflags, ifp));
1893 pcbgroup = in_pcbgroup_bytuple(pcbinfo, laddr, lport, faddr,
1894 fport);
1895 return (in_pcblookup_group(pcbinfo, pcbgroup, faddr, fport,
1896 laddr, lport, lookupflags, ifp));
1897 }
1898 #endif
1899 return (in_pcblookup_hash(pcbinfo, faddr, fport, laddr, lport,
1900 lookupflags, ifp));
1901 }
1902 #endif /* INET */
1903
1904 /*
1905 * Insert PCB onto various hash lists.
1906 */
1907 static int
1908 in_pcbinshash_internal(struct inpcb *inp, int do_pcbgroup_update)
1909 {
1910 struct inpcbhead *pcbhash;
1911 struct inpcbporthead *pcbporthash;
1912 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
1913 struct inpcbport *phd;
1914 u_int32_t hashkey_faddr;
1915
1916 INP_WLOCK_ASSERT(inp);
1917 INP_HASH_WLOCK_ASSERT(pcbinfo);
1918
1919 KASSERT((inp->inp_flags & INP_INHASHLIST) == 0,
1920 ("in_pcbinshash: INP_INHASHLIST"));
1921
1922 #ifdef INET6
1923 if (inp->inp_vflag & INP_IPV6)
1924 hashkey_faddr = inp->in6p_faddr.s6_addr32[3] /* XXX */;
1925 else
1926 #endif
1927 hashkey_faddr = inp->inp_faddr.s_addr;
1928
1929 pcbhash = &pcbinfo->ipi_hashbase[INP_PCBHASH(hashkey_faddr,
1930 inp->inp_lport, inp->inp_fport, pcbinfo->ipi_hashmask)];
1931
1932 pcbporthash = &pcbinfo->ipi_porthashbase[
1933 INP_PCBPORTHASH(inp->inp_lport, pcbinfo->ipi_porthashmask)];
1934
1935 /*
1936 * Go through port list and look for a head for this lport.
1937 */
1938 LIST_FOREACH(phd, pcbporthash, phd_hash) {
1939 if (phd->phd_port == inp->inp_lport)
1940 break;
1941 }
1942 /*
1943 * If none exists, malloc one and tack it on.
1944 */
1945 if (phd == NULL) {
1946 phd = malloc(sizeof(struct inpcbport), M_PCB, M_NOWAIT);
1947 if (phd == NULL) {
1948 return (ENOBUFS); /* XXX */
1949 }
1950 phd->phd_port = inp->inp_lport;
1951 LIST_INIT(&phd->phd_pcblist);
1952 LIST_INSERT_HEAD(pcbporthash, phd, phd_hash);
1953 }
1954 inp->inp_phd = phd;
1955 LIST_INSERT_HEAD(&phd->phd_pcblist, inp, inp_portlist);
1956 LIST_INSERT_HEAD(pcbhash, inp, inp_hash);
1957 inp->inp_flags |= INP_INHASHLIST;
1958 #ifdef PCBGROUP
1959 if (do_pcbgroup_update)
1960 in_pcbgroup_update(inp);
1961 #endif
1962 return (0);
1963 }
1964
1965 /*
1966 * For now, there are two public interfaces to insert an inpcb into the hash
1967 * lists -- one that does update pcbgroups, and one that doesn't. The latter
1968 * is used only in the TCP syncache, where in_pcbinshash is called before the
1969 * full 4-tuple is set for the inpcb, and we don't want to install in the
1970 * pcbgroup until later.
1971 *
1972 * XXXRW: This seems like a misfeature. in_pcbinshash should always update
1973 * connection groups, and partially initialised inpcbs should not be exposed
1974 * to either reservation hash tables or pcbgroups.
1975 */
1976 int
1977 in_pcbinshash(struct inpcb *inp)
1978 {
1979
1980 return (in_pcbinshash_internal(inp, 1));
1981 }
1982
1983 int
1984 in_pcbinshash_nopcbgroup(struct inpcb *inp)
1985 {
1986
1987 return (in_pcbinshash_internal(inp, 0));
1988 }
1989
1990 /*
1991 * Move PCB to the proper hash bucket when { faddr, fport } have been
1992 * changed. NOTE: This does not handle the case of the lport changing (the
1993 * hashed port list would have to be updated as well), so the lport must
1994 * not change after in_pcbinshash() has been called.
1995 */
1996 void
1997 in_pcbrehash_mbuf(struct inpcb *inp, struct mbuf *m)
1998 {
1999 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
2000 struct inpcbhead *head;
2001 u_int32_t hashkey_faddr;
2002
2003 INP_WLOCK_ASSERT(inp);
2004 INP_HASH_WLOCK_ASSERT(pcbinfo);
2005
2006 KASSERT(inp->inp_flags & INP_INHASHLIST,
2007 ("in_pcbrehash: !INP_INHASHLIST"));
2008
2009 #ifdef INET6
2010 if (inp->inp_vflag & INP_IPV6)
2011 hashkey_faddr = inp->in6p_faddr.s6_addr32[3] /* XXX */;
2012 else
2013 #endif
2014 hashkey_faddr = inp->inp_faddr.s_addr;
2015
2016 head = &pcbinfo->ipi_hashbase[INP_PCBHASH(hashkey_faddr,
2017 inp->inp_lport, inp->inp_fport, pcbinfo->ipi_hashmask)];
2018
2019 LIST_REMOVE(inp, inp_hash);
2020 LIST_INSERT_HEAD(head, inp, inp_hash);
2021
2022 #ifdef PCBGROUP
2023 if (m != NULL)
2024 in_pcbgroup_update_mbuf(inp, m);
2025 else
2026 in_pcbgroup_update(inp);
2027 #endif
2028 }
2029
2030 void
2031 in_pcbrehash(struct inpcb *inp)
2032 {
2033
2034 in_pcbrehash_mbuf(inp, NULL);
2035 }
2036
2037 /*
2038 * Remove PCB from various lists.
2039 */
2040 static void
2041 in_pcbremlists(struct inpcb *inp)
2042 {
2043 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
2044
2045 #ifdef INVARIANTS
2046 if (pcbinfo == &V_tcbinfo) {
2047 INP_INFO_RLOCK_ASSERT(pcbinfo);
2048 } else {
2049 INP_INFO_WLOCK_ASSERT(pcbinfo);
2050 }
2051 #endif
2052
2053 INP_WLOCK_ASSERT(inp);
2054 INP_LIST_WLOCK_ASSERT(pcbinfo);
2055
2056 inp->inp_gencnt = ++pcbinfo->ipi_gencnt;
2057 if (inp->inp_flags & INP_INHASHLIST) {
2058 struct inpcbport *phd = inp->inp_phd;
2059
2060 INP_HASH_WLOCK(pcbinfo);
2061 LIST_REMOVE(inp, inp_hash);
2062 LIST_REMOVE(inp, inp_portlist);
2063 if (LIST_FIRST(&phd->phd_pcblist) == NULL) {
2064 LIST_REMOVE(phd, phd_hash);
2065 free(phd, M_PCB);
2066 }
2067 INP_HASH_WUNLOCK(pcbinfo);
2068 inp->inp_flags &= ~INP_INHASHLIST;
2069 }
2070 LIST_REMOVE(inp, inp_list);
2071 pcbinfo->ipi_count--;
2072 #ifdef PCBGROUP
2073 in_pcbgroup_remove(inp);
2074 #endif
2075 }
2076
2077 /*
2078 * A set label operation has occurred at the socket layer, propagate the
2079 * label change into the in_pcb for the socket.
2080 */
2081 void
2082 in_pcbsosetlabel(struct socket *so)
2083 {
2084 #ifdef MAC
2085 struct inpcb *inp;
2086
2087 inp = sotoinpcb(so);
2088 KASSERT(inp != NULL, ("in_pcbsosetlabel: so->so_pcb == NULL"));
2089
2090 INP_WLOCK(inp);
2091 SOCK_LOCK(so);
2092 mac_inpcb_sosetlabel(so, inp);
2093 SOCK_UNLOCK(so);
2094 INP_WUNLOCK(inp);
2095 #endif
2096 }
2097
2098 /*
2099 * ipport_tick runs once per second, determining if random port allocation
2100 * should be continued. If more than ipport_randomcps ports have been
2101 * allocated in the last second, then we return to sequential port
2102 * allocation. We return to random allocation only once we drop below
2103 * ipport_randomcps for at least ipport_randomtime seconds.
2104 */
2105 static void
2106 ipport_tick(void *xtp)
2107 {
2108 VNET_ITERATOR_DECL(vnet_iter);
2109
2110 VNET_LIST_RLOCK_NOSLEEP();
2111 VNET_FOREACH(vnet_iter) {
2112 CURVNET_SET(vnet_iter); /* XXX appease INVARIANTS here */
2113 if (V_ipport_tcpallocs <=
2114 V_ipport_tcplastcount + V_ipport_randomcps) {
2115 if (V_ipport_stoprandom > 0)
2116 V_ipport_stoprandom--;
2117 } else
2118 V_ipport_stoprandom = V_ipport_randomtime;
2119 V_ipport_tcplastcount = V_ipport_tcpallocs;
2120 CURVNET_RESTORE();
2121 }
2122 VNET_LIST_RUNLOCK_NOSLEEP();
2123 callout_reset(&ipport_tick_callout, hz, ipport_tick, NULL);
2124 }
2125
2126 static void
2127 ip_fini(void *xtp)
2128 {
2129
2130 callout_stop(&ipport_tick_callout);
2131 }
2132
2133 /*
2134 * The ipport_callout should start running at about the time we attach the
2135 * inet or inet6 domains.
2136 */
2137 static void
2138 ipport_tick_init(const void *unused __unused)
2139 {
2140
2141 /* Start ipport_tick. */
2142 callout_init(&ipport_tick_callout, 1);
2143 callout_reset(&ipport_tick_callout, 1, ipport_tick, NULL);
2144 EVENTHANDLER_REGISTER(shutdown_pre_sync, ip_fini, NULL,
2145 SHUTDOWN_PRI_DEFAULT);
2146 }
2147 SYSINIT(ipport_tick_init, SI_SUB_PROTO_DOMAIN, SI_ORDER_MIDDLE,
2148 ipport_tick_init, NULL);
2149
2150 void
2151 inp_wlock(struct inpcb *inp)
2152 {
2153
2154 INP_WLOCK(inp);
2155 }
2156
2157 void
2158 inp_wunlock(struct inpcb *inp)
2159 {
2160
2161 INP_WUNLOCK(inp);
2162 }
2163
2164 void
2165 inp_rlock(struct inpcb *inp)
2166 {
2167
2168 INP_RLOCK(inp);
2169 }
2170
2171 void
2172 inp_runlock(struct inpcb *inp)
2173 {
2174
2175 INP_RUNLOCK(inp);
2176 }
2177
2178 #ifdef INVARIANTS
2179 void
2180 inp_lock_assert(struct inpcb *inp)
2181 {
2182
2183 INP_WLOCK_ASSERT(inp);
2184 }
2185
2186 void
2187 inp_unlock_assert(struct inpcb *inp)
2188 {
2189
2190 INP_UNLOCK_ASSERT(inp);
2191 }
2192 #endif
2193
2194 void
2195 inp_apply_all(void (*func)(struct inpcb *, void *), void *arg)
2196 {
2197 struct inpcb *inp;
2198
2199 INP_INFO_WLOCK(&V_tcbinfo);
2200 LIST_FOREACH(inp, V_tcbinfo.ipi_listhead, inp_list) {
2201 INP_WLOCK(inp);
2202 func(inp, arg);
2203 INP_WUNLOCK(inp);
2204 }
2205 INP_INFO_WUNLOCK(&V_tcbinfo);
2206 }
2207
2208 struct socket *
2209 inp_inpcbtosocket(struct inpcb *inp)
2210 {
2211
2212 INP_WLOCK_ASSERT(inp);
2213 return (inp->inp_socket);
2214 }
2215
2216 struct tcpcb *
2217 inp_inpcbtotcpcb(struct inpcb *inp)
2218 {
2219
2220 INP_WLOCK_ASSERT(inp);
2221 return ((struct tcpcb *)inp->inp_ppcb);
2222 }
2223
2224 int
2225 inp_ip_tos_get(const struct inpcb *inp)
2226 {
2227
2228 return (inp->inp_ip_tos);
2229 }
2230
2231 void
2232 inp_ip_tos_set(struct inpcb *inp, int val)
2233 {
2234
2235 inp->inp_ip_tos = val;
2236 }
2237
2238 void
2239 inp_4tuple_get(struct inpcb *inp, uint32_t *laddr, uint16_t *lp,
2240 uint32_t *faddr, uint16_t *fp)
2241 {
2242
2243 INP_LOCK_ASSERT(inp);
2244 *laddr = inp->inp_laddr.s_addr;
2245 *faddr = inp->inp_faddr.s_addr;
2246 *lp = inp->inp_lport;
2247 *fp = inp->inp_fport;
2248 }
2249
2250 struct inpcb *
2251 so_sotoinpcb(struct socket *so)
2252 {
2253
2254 return (sotoinpcb(so));
2255 }
2256
2257 struct tcpcb *
2258 so_sototcpcb(struct socket *so)
2259 {
2260
2261 return (sototcpcb(so));
2262 }
2263
2264 #ifdef DDB
2265 static void
2266 db_print_indent(int indent)
2267 {
2268 int i;
2269
2270 for (i = 0; i < indent; i++)
2271 db_printf(" ");
2272 }
2273
2274 static void
2275 db_print_inconninfo(struct in_conninfo *inc, const char *name, int indent)
2276 {
2277 char faddr_str[48], laddr_str[48];
2278
2279 db_print_indent(indent);
2280 db_printf("%s at %p\n", name, inc);
2281
2282 indent += 2;
2283
2284 #ifdef INET6
2285 if (inc->inc_flags & INC_ISIPV6) {
2286 /* IPv6. */
2287 ip6_sprintf(laddr_str, &inc->inc6_laddr);
2288 ip6_sprintf(faddr_str, &inc->inc6_faddr);
2289 } else
2290 #endif
2291 {
2292 /* IPv4. */
2293 inet_ntoa_r(inc->inc_laddr, laddr_str);
2294 inet_ntoa_r(inc->inc_faddr, faddr_str);
2295 }
2296 db_print_indent(indent);
2297 db_printf("inc_laddr %s inc_lport %u\n", laddr_str,
2298 ntohs(inc->inc_lport));
2299 db_print_indent(indent);
2300 db_printf("inc_faddr %s inc_fport %u\n", faddr_str,
2301 ntohs(inc->inc_fport));
2302 }
2303
2304 static void
2305 db_print_inpflags(int inp_flags)
2306 {
2307 int comma;
2308
2309 comma = 0;
2310 if (inp_flags & INP_RECVOPTS) {
2311 db_printf("%sINP_RECVOPTS", comma ? ", " : "");
2312 comma = 1;
2313 }
2314 if (inp_flags & INP_RECVRETOPTS) {
2315 db_printf("%sINP_RECVRETOPTS", comma ? ", " : "");
2316 comma = 1;
2317 }
2318 if (inp_flags & INP_RECVDSTADDR) {
2319 db_printf("%sINP_RECVDSTADDR", comma ? ", " : "");
2320 comma = 1;
2321 }
2322 if (inp_flags & INP_HDRINCL) {
2323 db_printf("%sINP_HDRINCL", comma ? ", " : "");
2324 comma = 1;
2325 }
2326 if (inp_flags & INP_HIGHPORT) {
2327 db_printf("%sINP_HIGHPORT", comma ? ", " : "");
2328 comma = 1;
2329 }
2330 if (inp_flags & INP_LOWPORT) {
2331 db_printf("%sINP_LOWPORT", comma ? ", " : "");
2332 comma = 1;
2333 }
2334 if (inp_flags & INP_ANONPORT) {
2335 db_printf("%sINP_ANONPORT", comma ? ", " : "");
2336 comma = 1;
2337 }
2338 if (inp_flags & INP_RECVIF) {
2339 db_printf("%sINP_RECVIF", comma ? ", " : "");
2340 comma = 1;
2341 }
2342 if (inp_flags & INP_MTUDISC) {
2343 db_printf("%sINP_MTUDISC", comma ? ", " : "");
2344 comma = 1;
2345 }
2346 if (inp_flags & INP_FAITH) {
2347 db_printf("%sINP_FAITH", comma ? ", " : "");
2348 comma = 1;
2349 }
2350 if (inp_flags & INP_RECVTTL) {
2351 db_printf("%sINP_RECVTTL", comma ? ", " : "");
2352 comma = 1;
2353 }
2354 if (inp_flags & INP_DONTFRAG) {
2355 db_printf("%sINP_DONTFRAG", comma ? ", " : "");
2356 comma = 1;
2357 }
2358 if (inp_flags & INP_RECVTOS) {
2359 db_printf("%sINP_RECVTOS", comma ? ", " : "");
2360 comma = 1;
2361 }
2362 if (inp_flags & IN6P_IPV6_V6ONLY) {
2363 db_printf("%sIN6P_IPV6_V6ONLY", comma ? ", " : "");
2364 comma = 1;
2365 }
2366 if (inp_flags & IN6P_PKTINFO) {
2367 db_printf("%sIN6P_PKTINFO", comma ? ", " : "");
2368 comma = 1;
2369 }
2370 if (inp_flags & IN6P_HOPLIMIT) {
2371 db_printf("%sIN6P_HOPLIMIT", comma ? ", " : "");
2372 comma = 1;
2373 }
2374 if (inp_flags & IN6P_HOPOPTS) {
2375 db_printf("%sIN6P_HOPOPTS", comma ? ", " : "");
2376 comma = 1;
2377 }
2378 if (inp_flags & IN6P_DSTOPTS) {
2379 db_printf("%sIN6P_DSTOPTS", comma ? ", " : "");
2380 comma = 1;
2381 }
2382 if (inp_flags & IN6P_RTHDR) {
2383 db_printf("%sIN6P_RTHDR", comma ? ", " : "");
2384 comma = 1;
2385 }
2386 if (inp_flags & IN6P_RTHDRDSTOPTS) {
2387 db_printf("%sIN6P_RTHDRDSTOPTS", comma ? ", " : "");
2388 comma = 1;
2389 }
2390 if (inp_flags & IN6P_TCLASS) {
2391 db_printf("%sIN6P_TCLASS", comma ? ", " : "");
2392 comma = 1;
2393 }
2394 if (inp_flags & IN6P_AUTOFLOWLABEL) {
2395 db_printf("%sIN6P_AUTOFLOWLABEL", comma ? ", " : "");
2396 comma = 1;
2397 }
2398 if (inp_flags & INP_TIMEWAIT) {
2399 db_printf("%sINP_TIMEWAIT", comma ? ", " : "");
2400 comma = 1;
2401 }
2402 if (inp_flags & INP_ONESBCAST) {
2403 db_printf("%sINP_ONESBCAST", comma ? ", " : "");
2404 comma = 1;
2405 }
2406 if (inp_flags & INP_DROPPED) {
2407 db_printf("%sINP_DROPPED", comma ? ", " : "");
2408 comma = 1;
2409 }
2410 if (inp_flags & INP_SOCKREF) {
2411 db_printf("%sINP_SOCKREF", comma ? ", " : "");
2412 comma = 1;
2413 }
2414 if (inp_flags & IN6P_RFC2292) {
2415 db_printf("%sIN6P_RFC2292", comma ? ", " : "");
2416 comma = 1;
2417 }
2418 if (inp_flags & IN6P_MTU) {
2419 db_printf("IN6P_MTU%s", comma ? ", " : "");
2420 comma = 1;
2421 }
2422 }
2423
2424 static void
2425 db_print_inpvflag(u_char inp_vflag)
2426 {
2427 int comma;
2428
2429 comma = 0;
2430 if (inp_vflag & INP_IPV4) {
2431 db_printf("%sINP_IPV4", comma ? ", " : "");
2432 comma = 1;
2433 }
2434 if (inp_vflag & INP_IPV6) {
2435 db_printf("%sINP_IPV6", comma ? ", " : "");
2436 comma = 1;
2437 }
2438 if (inp_vflag & INP_IPV6PROTO) {
2439 db_printf("%sINP_IPV6PROTO", comma ? ", " : "");
2440 comma = 1;
2441 }
2442 }
2443
2444 static void
2445 db_print_inpcb(struct inpcb *inp, const char *name, int indent)
2446 {
2447
2448 db_print_indent(indent);
2449 db_printf("%s at %p\n", name, inp);
2450
2451 indent += 2;
2452
2453 db_print_indent(indent);
2454 db_printf("inp_flow: 0x%x\n", inp->inp_flow);
2455
2456 db_print_inconninfo(&inp->inp_inc, "inp_conninfo", indent);
2457
2458 db_print_indent(indent);
2459 db_printf("inp_ppcb: %p inp_pcbinfo: %p inp_socket: %p\n",
2460 inp->inp_ppcb, inp->inp_pcbinfo, inp->inp_socket);
2461
2462 db_print_indent(indent);
2463 db_printf("inp_label: %p inp_flags: 0x%x (",
2464 inp->inp_label, inp->inp_flags);
2465 db_print_inpflags(inp->inp_flags);
2466 db_printf(")\n");
2467
2468 db_print_indent(indent);
2469 db_printf("inp_sp: %p inp_vflag: 0x%x (", inp->inp_sp,
2470 inp->inp_vflag);
2471 db_print_inpvflag(inp->inp_vflag);
2472 db_printf(")\n");
2473
2474 db_print_indent(indent);
2475 db_printf("inp_ip_ttl: %d inp_ip_p: %d inp_ip_minttl: %d\n",
2476 inp->inp_ip_ttl, inp->inp_ip_p, inp->inp_ip_minttl);
2477
2478 db_print_indent(indent);
2479 #ifdef INET6
2480 if (inp->inp_vflag & INP_IPV6) {
2481 db_printf("in6p_options: %p in6p_outputopts: %p "
2482 "in6p_moptions: %p\n", inp->in6p_options,
2483 inp->in6p_outputopts, inp->in6p_moptions);
2484 db_printf("in6p_icmp6filt: %p in6p_cksum %d "
2485 "in6p_hops %u\n", inp->in6p_icmp6filt, inp->in6p_cksum,
2486 inp->in6p_hops);
2487 } else
2488 #endif
2489 {
2490 db_printf("inp_ip_tos: %d inp_ip_options: %p "
2491 "inp_ip_moptions: %p\n", inp->inp_ip_tos,
2492 inp->inp_options, inp->inp_moptions);
2493 }
2494
2495 db_print_indent(indent);
2496 db_printf("inp_phd: %p inp_gencnt: %ju\n", inp->inp_phd,
2497 (uintmax_t)inp->inp_gencnt);
2498 }
2499
2500 DB_SHOW_COMMAND(inpcb, db_show_inpcb)
2501 {
2502 struct inpcb *inp;
2503
2504 if (!have_addr) {
2505 db_printf("usage: show inpcb <addr>\n");
2506 return;
2507 }
2508 inp = (struct inpcb *)addr;
2509
2510 db_print_inpcb(inp, "inpcb", 0);
2511 }
2512 #endif /* DDB */
Cache object: 091d35abf423d970ba09862b871c8b98
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