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/11.0/sys/netinet/in_pcb.c 301217 2016-06-02 17:51:29Z gnn $");
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 #include "opt_rss.h"
47
48 #include <sys/param.h>
49 #include <sys/systm.h>
50 #include <sys/lock.h>
51 #include <sys/malloc.h>
52 #include <sys/mbuf.h>
53 #include <sys/callout.h>
54 #include <sys/eventhandler.h>
55 #include <sys/domain.h>
56 #include <sys/protosw.h>
57 #include <sys/rmlock.h>
58 #include <sys/socket.h>
59 #include <sys/socketvar.h>
60 #include <sys/priv.h>
61 #include <sys/proc.h>
62 #include <sys/refcount.h>
63 #include <sys/jail.h>
64 #include <sys/kernel.h>
65 #include <sys/sysctl.h>
66
67 #ifdef DDB
68 #include <ddb/ddb.h>
69 #endif
70
71 #include <vm/uma.h>
72
73 #include <net/if.h>
74 #include <net/if_var.h>
75 #include <net/if_types.h>
76 #include <net/if_llatbl.h>
77 #include <net/route.h>
78 #include <net/rss_config.h>
79 #include <net/vnet.h>
80
81 #if defined(INET) || defined(INET6)
82 #include <netinet/in.h>
83 #include <netinet/in_pcb.h>
84 #include <netinet/ip_var.h>
85 #include <netinet/tcp_var.h>
86 #include <netinet/udp.h>
87 #include <netinet/udp_var.h>
88 #endif
89 #ifdef INET
90 #include <netinet/in_var.h>
91 #endif
92 #ifdef INET6
93 #include <netinet/ip6.h>
94 #include <netinet6/in6_pcb.h>
95 #include <netinet6/in6_var.h>
96 #include <netinet6/ip6_var.h>
97 #endif /* INET6 */
98
99
100 #ifdef IPSEC
101 #include <netipsec/ipsec.h>
102 #include <netipsec/key.h>
103 #endif /* IPSEC */
104
105 #include <security/mac/mac_framework.h>
106
107 static struct callout ipport_tick_callout;
108
109 /*
110 * These configure the range of local port addresses assigned to
111 * "unspecified" outgoing connections/packets/whatever.
112 */
113 VNET_DEFINE(int, ipport_lowfirstauto) = IPPORT_RESERVED - 1; /* 1023 */
114 VNET_DEFINE(int, ipport_lowlastauto) = IPPORT_RESERVEDSTART; /* 600 */
115 VNET_DEFINE(int, ipport_firstauto) = IPPORT_EPHEMERALFIRST; /* 10000 */
116 VNET_DEFINE(int, ipport_lastauto) = IPPORT_EPHEMERALLAST; /* 65535 */
117 VNET_DEFINE(int, ipport_hifirstauto) = IPPORT_HIFIRSTAUTO; /* 49152 */
118 VNET_DEFINE(int, ipport_hilastauto) = IPPORT_HILASTAUTO; /* 65535 */
119
120 /*
121 * Reserved ports accessible only to root. There are significant
122 * security considerations that must be accounted for when changing these,
123 * but the security benefits can be great. Please be careful.
124 */
125 VNET_DEFINE(int, ipport_reservedhigh) = IPPORT_RESERVED - 1; /* 1023 */
126 VNET_DEFINE(int, ipport_reservedlow);
127
128 /* Variables dealing with random ephemeral port allocation. */
129 VNET_DEFINE(int, ipport_randomized) = 1; /* user controlled via sysctl */
130 VNET_DEFINE(int, ipport_randomcps) = 10; /* user controlled via sysctl */
131 VNET_DEFINE(int, ipport_randomtime) = 45; /* user controlled via sysctl */
132 VNET_DEFINE(int, ipport_stoprandom); /* toggled by ipport_tick */
133 VNET_DEFINE(int, ipport_tcpallocs);
134 static VNET_DEFINE(int, ipport_tcplastcount);
135
136 #define V_ipport_tcplastcount VNET(ipport_tcplastcount)
137
138 static void in_pcbremlists(struct inpcb *inp);
139 #ifdef INET
140 static struct inpcb *in_pcblookup_hash_locked(struct inpcbinfo *pcbinfo,
141 struct in_addr faddr, u_int fport_arg,
142 struct in_addr laddr, u_int lport_arg,
143 int lookupflags, struct ifnet *ifp);
144
145 #define RANGECHK(var, min, max) \
146 if ((var) < (min)) { (var) = (min); } \
147 else if ((var) > (max)) { (var) = (max); }
148
149 static int
150 sysctl_net_ipport_check(SYSCTL_HANDLER_ARGS)
151 {
152 int error;
153
154 error = sysctl_handle_int(oidp, arg1, arg2, req);
155 if (error == 0) {
156 RANGECHK(V_ipport_lowfirstauto, 1, IPPORT_RESERVED - 1);
157 RANGECHK(V_ipport_lowlastauto, 1, IPPORT_RESERVED - 1);
158 RANGECHK(V_ipport_firstauto, IPPORT_RESERVED, IPPORT_MAX);
159 RANGECHK(V_ipport_lastauto, IPPORT_RESERVED, IPPORT_MAX);
160 RANGECHK(V_ipport_hifirstauto, IPPORT_RESERVED, IPPORT_MAX);
161 RANGECHK(V_ipport_hilastauto, IPPORT_RESERVED, IPPORT_MAX);
162 }
163 return (error);
164 }
165
166 #undef RANGECHK
167
168 static SYSCTL_NODE(_net_inet_ip, IPPROTO_IP, portrange, CTLFLAG_RW, 0,
169 "IP Ports");
170
171 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, lowfirst,
172 CTLFLAG_VNET | CTLTYPE_INT | CTLFLAG_RW,
173 &VNET_NAME(ipport_lowfirstauto), 0, &sysctl_net_ipport_check, "I", "");
174 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, lowlast,
175 CTLFLAG_VNET | CTLTYPE_INT | CTLFLAG_RW,
176 &VNET_NAME(ipport_lowlastauto), 0, &sysctl_net_ipport_check, "I", "");
177 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, first,
178 CTLFLAG_VNET | CTLTYPE_INT | CTLFLAG_RW,
179 &VNET_NAME(ipport_firstauto), 0, &sysctl_net_ipport_check, "I", "");
180 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, last,
181 CTLFLAG_VNET | CTLTYPE_INT | CTLFLAG_RW,
182 &VNET_NAME(ipport_lastauto), 0, &sysctl_net_ipport_check, "I", "");
183 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, hifirst,
184 CTLFLAG_VNET | CTLTYPE_INT | CTLFLAG_RW,
185 &VNET_NAME(ipport_hifirstauto), 0, &sysctl_net_ipport_check, "I", "");
186 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, hilast,
187 CTLFLAG_VNET | CTLTYPE_INT | CTLFLAG_RW,
188 &VNET_NAME(ipport_hilastauto), 0, &sysctl_net_ipport_check, "I", "");
189 SYSCTL_INT(_net_inet_ip_portrange, OID_AUTO, reservedhigh,
190 CTLFLAG_VNET | CTLFLAG_RW | CTLFLAG_SECURE,
191 &VNET_NAME(ipport_reservedhigh), 0, "");
192 SYSCTL_INT(_net_inet_ip_portrange, OID_AUTO, reservedlow,
193 CTLFLAG_RW|CTLFLAG_SECURE, &VNET_NAME(ipport_reservedlow), 0, "");
194 SYSCTL_INT(_net_inet_ip_portrange, OID_AUTO, randomized,
195 CTLFLAG_VNET | CTLFLAG_RW,
196 &VNET_NAME(ipport_randomized), 0, "Enable random port allocation");
197 SYSCTL_INT(_net_inet_ip_portrange, OID_AUTO, randomcps,
198 CTLFLAG_VNET | CTLFLAG_RW,
199 &VNET_NAME(ipport_randomcps), 0, "Maximum number of random port "
200 "allocations before switching to a sequental one");
201 SYSCTL_INT(_net_inet_ip_portrange, OID_AUTO, randomtime,
202 CTLFLAG_VNET | CTLFLAG_RW,
203 &VNET_NAME(ipport_randomtime), 0,
204 "Minimum time to keep sequental port "
205 "allocation before switching to a random one");
206 #endif /* INET */
207
208 /*
209 * in_pcb.c: manage the Protocol Control Blocks.
210 *
211 * NOTE: It is assumed that most of these functions will be called with
212 * the pcbinfo lock held, and often, the inpcb lock held, as these utility
213 * functions often modify hash chains or addresses in pcbs.
214 */
215
216 /*
217 * Initialize an inpcbinfo -- we should be able to reduce the number of
218 * arguments in time.
219 */
220 void
221 in_pcbinfo_init(struct inpcbinfo *pcbinfo, const char *name,
222 struct inpcbhead *listhead, int hash_nelements, int porthash_nelements,
223 char *inpcbzone_name, uma_init inpcbzone_init, uma_fini inpcbzone_fini,
224 uint32_t inpcbzone_flags, u_int hashfields)
225 {
226
227 INP_INFO_LOCK_INIT(pcbinfo, name);
228 INP_HASH_LOCK_INIT(pcbinfo, "pcbinfohash"); /* XXXRW: argument? */
229 INP_LIST_LOCK_INIT(pcbinfo, "pcbinfolist");
230 #ifdef VIMAGE
231 pcbinfo->ipi_vnet = curvnet;
232 #endif
233 pcbinfo->ipi_listhead = listhead;
234 LIST_INIT(pcbinfo->ipi_listhead);
235 pcbinfo->ipi_count = 0;
236 pcbinfo->ipi_hashbase = hashinit(hash_nelements, M_PCB,
237 &pcbinfo->ipi_hashmask);
238 pcbinfo->ipi_porthashbase = hashinit(porthash_nelements, M_PCB,
239 &pcbinfo->ipi_porthashmask);
240 #ifdef PCBGROUP
241 in_pcbgroup_init(pcbinfo, hashfields, hash_nelements);
242 #endif
243 pcbinfo->ipi_zone = uma_zcreate(inpcbzone_name, sizeof(struct inpcb),
244 NULL, NULL, inpcbzone_init, inpcbzone_fini, UMA_ALIGN_PTR,
245 inpcbzone_flags);
246 uma_zone_set_max(pcbinfo->ipi_zone, maxsockets);
247 uma_zone_set_warning(pcbinfo->ipi_zone,
248 "kern.ipc.maxsockets limit reached");
249 }
250
251 /*
252 * Destroy an inpcbinfo.
253 */
254 void
255 in_pcbinfo_destroy(struct inpcbinfo *pcbinfo)
256 {
257
258 KASSERT(pcbinfo->ipi_count == 0,
259 ("%s: ipi_count = %u", __func__, pcbinfo->ipi_count));
260
261 hashdestroy(pcbinfo->ipi_hashbase, M_PCB, pcbinfo->ipi_hashmask);
262 hashdestroy(pcbinfo->ipi_porthashbase, M_PCB,
263 pcbinfo->ipi_porthashmask);
264 #ifdef PCBGROUP
265 in_pcbgroup_destroy(pcbinfo);
266 #endif
267 uma_zdestroy(pcbinfo->ipi_zone);
268 INP_LIST_LOCK_DESTROY(pcbinfo);
269 INP_HASH_LOCK_DESTROY(pcbinfo);
270 INP_INFO_LOCK_DESTROY(pcbinfo);
271 }
272
273 /*
274 * Allocate a PCB and associate it with the socket.
275 * On success return with the PCB locked.
276 */
277 int
278 in_pcballoc(struct socket *so, struct inpcbinfo *pcbinfo)
279 {
280 struct inpcb *inp;
281 int error;
282
283 #ifdef INVARIANTS
284 if (pcbinfo == &V_tcbinfo) {
285 INP_INFO_RLOCK_ASSERT(pcbinfo);
286 } else {
287 INP_INFO_WLOCK_ASSERT(pcbinfo);
288 }
289 #endif
290
291 error = 0;
292 inp = uma_zalloc(pcbinfo->ipi_zone, M_NOWAIT);
293 if (inp == NULL)
294 return (ENOBUFS);
295 bzero(inp, inp_zero_size);
296 inp->inp_pcbinfo = pcbinfo;
297 inp->inp_socket = so;
298 inp->inp_cred = crhold(so->so_cred);
299 inp->inp_inc.inc_fibnum = so->so_fibnum;
300 #ifdef MAC
301 error = mac_inpcb_init(inp, M_NOWAIT);
302 if (error != 0)
303 goto out;
304 mac_inpcb_create(so, inp);
305 #endif
306 #ifdef IPSEC
307 error = ipsec_init_policy(so, &inp->inp_sp);
308 if (error != 0) {
309 #ifdef MAC
310 mac_inpcb_destroy(inp);
311 #endif
312 goto out;
313 }
314 #endif /*IPSEC*/
315 #ifdef INET6
316 if (INP_SOCKAF(so) == AF_INET6) {
317 inp->inp_vflag |= INP_IPV6PROTO;
318 if (V_ip6_v6only)
319 inp->inp_flags |= IN6P_IPV6_V6ONLY;
320 }
321 #endif
322 INP_WLOCK(inp);
323 INP_LIST_WLOCK(pcbinfo);
324 LIST_INSERT_HEAD(pcbinfo->ipi_listhead, inp, inp_list);
325 pcbinfo->ipi_count++;
326 so->so_pcb = (caddr_t)inp;
327 #ifdef INET6
328 if (V_ip6_auto_flowlabel)
329 inp->inp_flags |= IN6P_AUTOFLOWLABEL;
330 #endif
331 inp->inp_gencnt = ++pcbinfo->ipi_gencnt;
332 refcount_init(&inp->inp_refcount, 1); /* Reference from inpcbinfo */
333 INP_LIST_WUNLOCK(pcbinfo);
334 #if defined(IPSEC) || defined(MAC)
335 out:
336 if (error != 0) {
337 crfree(inp->inp_cred);
338 uma_zfree(pcbinfo->ipi_zone, inp);
339 }
340 #endif
341 return (error);
342 }
343
344 #ifdef INET
345 int
346 in_pcbbind(struct inpcb *inp, struct sockaddr *nam, struct ucred *cred)
347 {
348 int anonport, error;
349
350 INP_WLOCK_ASSERT(inp);
351 INP_HASH_WLOCK_ASSERT(inp->inp_pcbinfo);
352
353 if (inp->inp_lport != 0 || inp->inp_laddr.s_addr != INADDR_ANY)
354 return (EINVAL);
355 anonport = nam == NULL || ((struct sockaddr_in *)nam)->sin_port == 0;
356 error = in_pcbbind_setup(inp, nam, &inp->inp_laddr.s_addr,
357 &inp->inp_lport, cred);
358 if (error)
359 return (error);
360 if (in_pcbinshash(inp) != 0) {
361 inp->inp_laddr.s_addr = INADDR_ANY;
362 inp->inp_lport = 0;
363 return (EAGAIN);
364 }
365 if (anonport)
366 inp->inp_flags |= INP_ANONPORT;
367 return (0);
368 }
369 #endif
370
371 /*
372 * Select a local port (number) to use.
373 */
374 #if defined(INET) || defined(INET6)
375 int
376 in_pcb_lport(struct inpcb *inp, struct in_addr *laddrp, u_short *lportp,
377 struct ucred *cred, int lookupflags)
378 {
379 struct inpcbinfo *pcbinfo;
380 struct inpcb *tmpinp;
381 unsigned short *lastport;
382 int count, dorandom, error;
383 u_short aux, first, last, lport;
384 #ifdef INET
385 struct in_addr laddr;
386 #endif
387
388 pcbinfo = inp->inp_pcbinfo;
389
390 /*
391 * Because no actual state changes occur here, a global write lock on
392 * the pcbinfo isn't required.
393 */
394 INP_LOCK_ASSERT(inp);
395 INP_HASH_LOCK_ASSERT(pcbinfo);
396
397 if (inp->inp_flags & INP_HIGHPORT) {
398 first = V_ipport_hifirstauto; /* sysctl */
399 last = V_ipport_hilastauto;
400 lastport = &pcbinfo->ipi_lasthi;
401 } else if (inp->inp_flags & INP_LOWPORT) {
402 error = priv_check_cred(cred, PRIV_NETINET_RESERVEDPORT, 0);
403 if (error)
404 return (error);
405 first = V_ipport_lowfirstauto; /* 1023 */
406 last = V_ipport_lowlastauto; /* 600 */
407 lastport = &pcbinfo->ipi_lastlow;
408 } else {
409 first = V_ipport_firstauto; /* sysctl */
410 last = V_ipport_lastauto;
411 lastport = &pcbinfo->ipi_lastport;
412 }
413 /*
414 * For UDP(-Lite), use random port allocation as long as the user
415 * allows it. For TCP (and as of yet unknown) connections,
416 * use random port allocation only if the user allows it AND
417 * ipport_tick() allows it.
418 */
419 if (V_ipport_randomized &&
420 (!V_ipport_stoprandom || pcbinfo == &V_udbinfo ||
421 pcbinfo == &V_ulitecbinfo))
422 dorandom = 1;
423 else
424 dorandom = 0;
425 /*
426 * It makes no sense to do random port allocation if
427 * we have the only port available.
428 */
429 if (first == last)
430 dorandom = 0;
431 /* Make sure to not include UDP(-Lite) packets in the count. */
432 if (pcbinfo != &V_udbinfo || pcbinfo != &V_ulitecbinfo)
433 V_ipport_tcpallocs++;
434 /*
435 * Instead of having two loops further down counting up or down
436 * make sure that first is always <= last and go with only one
437 * code path implementing all logic.
438 */
439 if (first > last) {
440 aux = first;
441 first = last;
442 last = aux;
443 }
444
445 #ifdef INET
446 /* Make the compiler happy. */
447 laddr.s_addr = 0;
448 if ((inp->inp_vflag & (INP_IPV4|INP_IPV6)) == INP_IPV4) {
449 KASSERT(laddrp != NULL, ("%s: laddrp NULL for v4 inp %p",
450 __func__, inp));
451 laddr = *laddrp;
452 }
453 #endif
454 tmpinp = NULL; /* Make compiler happy. */
455 lport = *lportp;
456
457 if (dorandom)
458 *lastport = first + (arc4random() % (last - first));
459
460 count = last - first;
461
462 do {
463 if (count-- < 0) /* completely used? */
464 return (EADDRNOTAVAIL);
465 ++*lastport;
466 if (*lastport < first || *lastport > last)
467 *lastport = first;
468 lport = htons(*lastport);
469
470 #ifdef INET6
471 if ((inp->inp_vflag & INP_IPV6) != 0)
472 tmpinp = in6_pcblookup_local(pcbinfo,
473 &inp->in6p_laddr, lport, lookupflags, cred);
474 #endif
475 #if defined(INET) && defined(INET6)
476 else
477 #endif
478 #ifdef INET
479 tmpinp = in_pcblookup_local(pcbinfo, laddr,
480 lport, lookupflags, cred);
481 #endif
482 } while (tmpinp != NULL);
483
484 #ifdef INET
485 if ((inp->inp_vflag & (INP_IPV4|INP_IPV6)) == INP_IPV4)
486 laddrp->s_addr = laddr.s_addr;
487 #endif
488 *lportp = lport;
489
490 return (0);
491 }
492
493 /*
494 * Return cached socket options.
495 */
496 short
497 inp_so_options(const struct inpcb *inp)
498 {
499 short so_options;
500
501 so_options = 0;
502
503 if ((inp->inp_flags2 & INP_REUSEPORT) != 0)
504 so_options |= SO_REUSEPORT;
505 if ((inp->inp_flags2 & INP_REUSEADDR) != 0)
506 so_options |= SO_REUSEADDR;
507 return (so_options);
508 }
509 #endif /* INET || INET6 */
510
511 /*
512 * Check if a new BINDMULTI socket is allowed to be created.
513 *
514 * ni points to the new inp.
515 * oi points to the exisitng inp.
516 *
517 * This checks whether the existing inp also has BINDMULTI and
518 * whether the credentials match.
519 */
520 int
521 in_pcbbind_check_bindmulti(const struct inpcb *ni, const struct inpcb *oi)
522 {
523 /* Check permissions match */
524 if ((ni->inp_flags2 & INP_BINDMULTI) &&
525 (ni->inp_cred->cr_uid !=
526 oi->inp_cred->cr_uid))
527 return (0);
528
529 /* Check the existing inp has BINDMULTI set */
530 if ((ni->inp_flags2 & INP_BINDMULTI) &&
531 ((oi->inp_flags2 & INP_BINDMULTI) == 0))
532 return (0);
533
534 /*
535 * We're okay - either INP_BINDMULTI isn't set on ni, or
536 * it is and it matches the checks.
537 */
538 return (1);
539 }
540
541 #ifdef INET
542 /*
543 * Set up a bind operation on a PCB, performing port allocation
544 * as required, but do not actually modify the PCB. Callers can
545 * either complete the bind by setting inp_laddr/inp_lport and
546 * calling in_pcbinshash(), or they can just use the resulting
547 * port and address to authorise the sending of a once-off packet.
548 *
549 * On error, the values of *laddrp and *lportp are not changed.
550 */
551 int
552 in_pcbbind_setup(struct inpcb *inp, struct sockaddr *nam, in_addr_t *laddrp,
553 u_short *lportp, struct ucred *cred)
554 {
555 struct socket *so = inp->inp_socket;
556 struct sockaddr_in *sin;
557 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
558 struct in_addr laddr;
559 u_short lport = 0;
560 int lookupflags = 0, reuseport = (so->so_options & SO_REUSEPORT);
561 int error;
562
563 /*
564 * No state changes, so read locks are sufficient here.
565 */
566 INP_LOCK_ASSERT(inp);
567 INP_HASH_LOCK_ASSERT(pcbinfo);
568
569 if (TAILQ_EMPTY(&V_in_ifaddrhead)) /* XXX broken! */
570 return (EADDRNOTAVAIL);
571 laddr.s_addr = *laddrp;
572 if (nam != NULL && laddr.s_addr != INADDR_ANY)
573 return (EINVAL);
574 if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) == 0)
575 lookupflags = INPLOOKUP_WILDCARD;
576 if (nam == NULL) {
577 if ((error = prison_local_ip4(cred, &laddr)) != 0)
578 return (error);
579 } else {
580 sin = (struct sockaddr_in *)nam;
581 if (nam->sa_len != sizeof (*sin))
582 return (EINVAL);
583 #ifdef notdef
584 /*
585 * We should check the family, but old programs
586 * incorrectly fail to initialize it.
587 */
588 if (sin->sin_family != AF_INET)
589 return (EAFNOSUPPORT);
590 #endif
591 error = prison_local_ip4(cred, &sin->sin_addr);
592 if (error)
593 return (error);
594 if (sin->sin_port != *lportp) {
595 /* Don't allow the port to change. */
596 if (*lportp != 0)
597 return (EINVAL);
598 lport = sin->sin_port;
599 }
600 /* NB: lport is left as 0 if the port isn't being changed. */
601 if (IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
602 /*
603 * Treat SO_REUSEADDR as SO_REUSEPORT for multicast;
604 * allow complete duplication of binding if
605 * SO_REUSEPORT is set, or if SO_REUSEADDR is set
606 * and a multicast address is bound on both
607 * new and duplicated sockets.
608 */
609 if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) != 0)
610 reuseport = SO_REUSEADDR|SO_REUSEPORT;
611 } else if (sin->sin_addr.s_addr != INADDR_ANY) {
612 sin->sin_port = 0; /* yech... */
613 bzero(&sin->sin_zero, sizeof(sin->sin_zero));
614 /*
615 * Is the address a local IP address?
616 * If INP_BINDANY is set, then the socket may be bound
617 * to any endpoint address, local or not.
618 */
619 if ((inp->inp_flags & INP_BINDANY) == 0 &&
620 ifa_ifwithaddr_check((struct sockaddr *)sin) == 0)
621 return (EADDRNOTAVAIL);
622 }
623 laddr = sin->sin_addr;
624 if (lport) {
625 struct inpcb *t;
626 struct tcptw *tw;
627
628 /* GROSS */
629 if (ntohs(lport) <= V_ipport_reservedhigh &&
630 ntohs(lport) >= V_ipport_reservedlow &&
631 priv_check_cred(cred, PRIV_NETINET_RESERVEDPORT,
632 0))
633 return (EACCES);
634 if (!IN_MULTICAST(ntohl(sin->sin_addr.s_addr)) &&
635 priv_check_cred(inp->inp_cred,
636 PRIV_NETINET_REUSEPORT, 0) != 0) {
637 t = in_pcblookup_local(pcbinfo, sin->sin_addr,
638 lport, INPLOOKUP_WILDCARD, cred);
639 /*
640 * XXX
641 * This entire block sorely needs a rewrite.
642 */
643 if (t &&
644 ((inp->inp_flags2 & INP_BINDMULTI) == 0) &&
645 ((t->inp_flags & INP_TIMEWAIT) == 0) &&
646 (so->so_type != SOCK_STREAM ||
647 ntohl(t->inp_faddr.s_addr) == INADDR_ANY) &&
648 (ntohl(sin->sin_addr.s_addr) != INADDR_ANY ||
649 ntohl(t->inp_laddr.s_addr) != INADDR_ANY ||
650 (t->inp_flags2 & INP_REUSEPORT) == 0) &&
651 (inp->inp_cred->cr_uid !=
652 t->inp_cred->cr_uid))
653 return (EADDRINUSE);
654
655 /*
656 * If the socket is a BINDMULTI socket, then
657 * the credentials need to match and the
658 * original socket also has to have been bound
659 * with BINDMULTI.
660 */
661 if (t && (! in_pcbbind_check_bindmulti(inp, t)))
662 return (EADDRINUSE);
663 }
664 t = in_pcblookup_local(pcbinfo, sin->sin_addr,
665 lport, lookupflags, cred);
666 if (t && (t->inp_flags & INP_TIMEWAIT)) {
667 /*
668 * XXXRW: If an incpb has had its timewait
669 * state recycled, we treat the address as
670 * being in use (for now). This is better
671 * than a panic, but not desirable.
672 */
673 tw = intotw(t);
674 if (tw == NULL ||
675 (reuseport & tw->tw_so_options) == 0)
676 return (EADDRINUSE);
677 } else if (t &&
678 ((inp->inp_flags2 & INP_BINDMULTI) == 0) &&
679 (reuseport & inp_so_options(t)) == 0) {
680 #ifdef INET6
681 if (ntohl(sin->sin_addr.s_addr) !=
682 INADDR_ANY ||
683 ntohl(t->inp_laddr.s_addr) !=
684 INADDR_ANY ||
685 (inp->inp_vflag & INP_IPV6PROTO) == 0 ||
686 (t->inp_vflag & INP_IPV6PROTO) == 0)
687 #endif
688 return (EADDRINUSE);
689 if (t && (! in_pcbbind_check_bindmulti(inp, t)))
690 return (EADDRINUSE);
691 }
692 }
693 }
694 if (*lportp != 0)
695 lport = *lportp;
696 if (lport == 0) {
697 error = in_pcb_lport(inp, &laddr, &lport, cred, lookupflags);
698 if (error != 0)
699 return (error);
700
701 }
702 *laddrp = laddr.s_addr;
703 *lportp = lport;
704 return (0);
705 }
706
707 /*
708 * Connect from a socket to a specified address.
709 * Both address and port must be specified in argument sin.
710 * If don't have a local address for this socket yet,
711 * then pick one.
712 */
713 int
714 in_pcbconnect_mbuf(struct inpcb *inp, struct sockaddr *nam,
715 struct ucred *cred, struct mbuf *m)
716 {
717 u_short lport, fport;
718 in_addr_t laddr, faddr;
719 int anonport, error;
720
721 INP_WLOCK_ASSERT(inp);
722 INP_HASH_WLOCK_ASSERT(inp->inp_pcbinfo);
723
724 lport = inp->inp_lport;
725 laddr = inp->inp_laddr.s_addr;
726 anonport = (lport == 0);
727 error = in_pcbconnect_setup(inp, nam, &laddr, &lport, &faddr, &fport,
728 NULL, cred);
729 if (error)
730 return (error);
731
732 /* Do the initial binding of the local address if required. */
733 if (inp->inp_laddr.s_addr == INADDR_ANY && inp->inp_lport == 0) {
734 inp->inp_lport = lport;
735 inp->inp_laddr.s_addr = laddr;
736 if (in_pcbinshash(inp) != 0) {
737 inp->inp_laddr.s_addr = INADDR_ANY;
738 inp->inp_lport = 0;
739 return (EAGAIN);
740 }
741 }
742
743 /* Commit the remaining changes. */
744 inp->inp_lport = lport;
745 inp->inp_laddr.s_addr = laddr;
746 inp->inp_faddr.s_addr = faddr;
747 inp->inp_fport = fport;
748 in_pcbrehash_mbuf(inp, m);
749
750 if (anonport)
751 inp->inp_flags |= INP_ANONPORT;
752 return (0);
753 }
754
755 int
756 in_pcbconnect(struct inpcb *inp, struct sockaddr *nam, struct ucred *cred)
757 {
758
759 return (in_pcbconnect_mbuf(inp, nam, cred, NULL));
760 }
761
762 /*
763 * Do proper source address selection on an unbound socket in case
764 * of connect. Take jails into account as well.
765 */
766 int
767 in_pcbladdr(struct inpcb *inp, struct in_addr *faddr, struct in_addr *laddr,
768 struct ucred *cred)
769 {
770 struct ifaddr *ifa;
771 struct sockaddr *sa;
772 struct sockaddr_in *sin;
773 struct route sro;
774 int error;
775
776 KASSERT(laddr != NULL, ("%s: laddr NULL", __func__));
777
778 /*
779 * Bypass source address selection and use the primary jail IP
780 * if requested.
781 */
782 if (cred != NULL && !prison_saddrsel_ip4(cred, laddr))
783 return (0);
784
785 error = 0;
786 bzero(&sro, sizeof(sro));
787
788 sin = (struct sockaddr_in *)&sro.ro_dst;
789 sin->sin_family = AF_INET;
790 sin->sin_len = sizeof(struct sockaddr_in);
791 sin->sin_addr.s_addr = faddr->s_addr;
792
793 /*
794 * If route is known our src addr is taken from the i/f,
795 * else punt.
796 *
797 * Find out route to destination.
798 */
799 if ((inp->inp_socket->so_options & SO_DONTROUTE) == 0)
800 in_rtalloc_ign(&sro, 0, inp->inp_inc.inc_fibnum);
801
802 /*
803 * If we found a route, use the address corresponding to
804 * the outgoing interface.
805 *
806 * Otherwise assume faddr is reachable on a directly connected
807 * network and try to find a corresponding interface to take
808 * the source address from.
809 */
810 if (sro.ro_rt == NULL || sro.ro_rt->rt_ifp == NULL) {
811 struct in_ifaddr *ia;
812 struct ifnet *ifp;
813
814 ia = ifatoia(ifa_ifwithdstaddr((struct sockaddr *)sin,
815 inp->inp_socket->so_fibnum));
816 if (ia == NULL)
817 ia = ifatoia(ifa_ifwithnet((struct sockaddr *)sin, 0,
818 inp->inp_socket->so_fibnum));
819 if (ia == NULL) {
820 error = ENETUNREACH;
821 goto done;
822 }
823
824 if (cred == NULL || !prison_flag(cred, PR_IP4)) {
825 laddr->s_addr = ia->ia_addr.sin_addr.s_addr;
826 ifa_free(&ia->ia_ifa);
827 goto done;
828 }
829
830 ifp = ia->ia_ifp;
831 ifa_free(&ia->ia_ifa);
832 ia = NULL;
833 IF_ADDR_RLOCK(ifp);
834 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
835
836 sa = ifa->ifa_addr;
837 if (sa->sa_family != AF_INET)
838 continue;
839 sin = (struct sockaddr_in *)sa;
840 if (prison_check_ip4(cred, &sin->sin_addr) == 0) {
841 ia = (struct in_ifaddr *)ifa;
842 break;
843 }
844 }
845 if (ia != NULL) {
846 laddr->s_addr = ia->ia_addr.sin_addr.s_addr;
847 IF_ADDR_RUNLOCK(ifp);
848 goto done;
849 }
850 IF_ADDR_RUNLOCK(ifp);
851
852 /* 3. As a last resort return the 'default' jail address. */
853 error = prison_get_ip4(cred, laddr);
854 goto done;
855 }
856
857 /*
858 * If the outgoing interface on the route found is not
859 * a loopback interface, use the address from that interface.
860 * In case of jails do those three steps:
861 * 1. check if the interface address belongs to the jail. If so use it.
862 * 2. check if we have any address on the outgoing interface
863 * belonging to this jail. If so use it.
864 * 3. as a last resort return the 'default' jail address.
865 */
866 if ((sro.ro_rt->rt_ifp->if_flags & IFF_LOOPBACK) == 0) {
867 struct in_ifaddr *ia;
868 struct ifnet *ifp;
869
870 /* If not jailed, use the default returned. */
871 if (cred == NULL || !prison_flag(cred, PR_IP4)) {
872 ia = (struct in_ifaddr *)sro.ro_rt->rt_ifa;
873 laddr->s_addr = ia->ia_addr.sin_addr.s_addr;
874 goto done;
875 }
876
877 /* Jailed. */
878 /* 1. Check if the iface address belongs to the jail. */
879 sin = (struct sockaddr_in *)sro.ro_rt->rt_ifa->ifa_addr;
880 if (prison_check_ip4(cred, &sin->sin_addr) == 0) {
881 ia = (struct in_ifaddr *)sro.ro_rt->rt_ifa;
882 laddr->s_addr = ia->ia_addr.sin_addr.s_addr;
883 goto done;
884 }
885
886 /*
887 * 2. Check if we have any address on the outgoing interface
888 * belonging to this jail.
889 */
890 ia = NULL;
891 ifp = sro.ro_rt->rt_ifp;
892 IF_ADDR_RLOCK(ifp);
893 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
894 sa = ifa->ifa_addr;
895 if (sa->sa_family != AF_INET)
896 continue;
897 sin = (struct sockaddr_in *)sa;
898 if (prison_check_ip4(cred, &sin->sin_addr) == 0) {
899 ia = (struct in_ifaddr *)ifa;
900 break;
901 }
902 }
903 if (ia != NULL) {
904 laddr->s_addr = ia->ia_addr.sin_addr.s_addr;
905 IF_ADDR_RUNLOCK(ifp);
906 goto done;
907 }
908 IF_ADDR_RUNLOCK(ifp);
909
910 /* 3. As a last resort return the 'default' jail address. */
911 error = prison_get_ip4(cred, laddr);
912 goto done;
913 }
914
915 /*
916 * The outgoing interface is marked with 'loopback net', so a route
917 * to ourselves is here.
918 * Try to find the interface of the destination address and then
919 * take the address from there. That interface is not necessarily
920 * a loopback interface.
921 * In case of jails, check that it is an address of the jail
922 * and if we cannot find, fall back to the 'default' jail address.
923 */
924 if ((sro.ro_rt->rt_ifp->if_flags & IFF_LOOPBACK) != 0) {
925 struct sockaddr_in sain;
926 struct in_ifaddr *ia;
927
928 bzero(&sain, sizeof(struct sockaddr_in));
929 sain.sin_family = AF_INET;
930 sain.sin_len = sizeof(struct sockaddr_in);
931 sain.sin_addr.s_addr = faddr->s_addr;
932
933 ia = ifatoia(ifa_ifwithdstaddr(sintosa(&sain),
934 inp->inp_socket->so_fibnum));
935 if (ia == NULL)
936 ia = ifatoia(ifa_ifwithnet(sintosa(&sain), 0,
937 inp->inp_socket->so_fibnum));
938 if (ia == NULL)
939 ia = ifatoia(ifa_ifwithaddr(sintosa(&sain)));
940
941 if (cred == NULL || !prison_flag(cred, PR_IP4)) {
942 if (ia == NULL) {
943 error = ENETUNREACH;
944 goto done;
945 }
946 laddr->s_addr = ia->ia_addr.sin_addr.s_addr;
947 ifa_free(&ia->ia_ifa);
948 goto done;
949 }
950
951 /* Jailed. */
952 if (ia != NULL) {
953 struct ifnet *ifp;
954
955 ifp = ia->ia_ifp;
956 ifa_free(&ia->ia_ifa);
957 ia = NULL;
958 IF_ADDR_RLOCK(ifp);
959 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
960
961 sa = ifa->ifa_addr;
962 if (sa->sa_family != AF_INET)
963 continue;
964 sin = (struct sockaddr_in *)sa;
965 if (prison_check_ip4(cred,
966 &sin->sin_addr) == 0) {
967 ia = (struct in_ifaddr *)ifa;
968 break;
969 }
970 }
971 if (ia != NULL) {
972 laddr->s_addr = ia->ia_addr.sin_addr.s_addr;
973 IF_ADDR_RUNLOCK(ifp);
974 goto done;
975 }
976 IF_ADDR_RUNLOCK(ifp);
977 }
978
979 /* 3. As a last resort return the 'default' jail address. */
980 error = prison_get_ip4(cred, laddr);
981 goto done;
982 }
983
984 done:
985 if (sro.ro_rt != NULL)
986 RTFREE(sro.ro_rt);
987 return (error);
988 }
989
990 /*
991 * Set up for a connect from a socket to the specified address.
992 * On entry, *laddrp and *lportp should contain the current local
993 * address and port for the PCB; these are updated to the values
994 * that should be placed in inp_laddr and inp_lport to complete
995 * the connect.
996 *
997 * On success, *faddrp and *fportp will be set to the remote address
998 * and port. These are not updated in the error case.
999 *
1000 * If the operation fails because the connection already exists,
1001 * *oinpp will be set to the PCB of that connection so that the
1002 * caller can decide to override it. In all other cases, *oinpp
1003 * is set to NULL.
1004 */
1005 int
1006 in_pcbconnect_setup(struct inpcb *inp, struct sockaddr *nam,
1007 in_addr_t *laddrp, u_short *lportp, in_addr_t *faddrp, u_short *fportp,
1008 struct inpcb **oinpp, struct ucred *cred)
1009 {
1010 struct rm_priotracker in_ifa_tracker;
1011 struct sockaddr_in *sin = (struct sockaddr_in *)nam;
1012 struct in_ifaddr *ia;
1013 struct inpcb *oinp;
1014 struct in_addr laddr, faddr;
1015 u_short lport, fport;
1016 int error;
1017
1018 /*
1019 * Because a global state change doesn't actually occur here, a read
1020 * lock is sufficient.
1021 */
1022 INP_LOCK_ASSERT(inp);
1023 INP_HASH_LOCK_ASSERT(inp->inp_pcbinfo);
1024
1025 if (oinpp != NULL)
1026 *oinpp = NULL;
1027 if (nam->sa_len != sizeof (*sin))
1028 return (EINVAL);
1029 if (sin->sin_family != AF_INET)
1030 return (EAFNOSUPPORT);
1031 if (sin->sin_port == 0)
1032 return (EADDRNOTAVAIL);
1033 laddr.s_addr = *laddrp;
1034 lport = *lportp;
1035 faddr = sin->sin_addr;
1036 fport = sin->sin_port;
1037
1038 if (!TAILQ_EMPTY(&V_in_ifaddrhead)) {
1039 /*
1040 * If the destination address is INADDR_ANY,
1041 * use the primary local address.
1042 * If the supplied address is INADDR_BROADCAST,
1043 * and the primary interface supports broadcast,
1044 * choose the broadcast address for that interface.
1045 */
1046 if (faddr.s_addr == INADDR_ANY) {
1047 IN_IFADDR_RLOCK(&in_ifa_tracker);
1048 faddr =
1049 IA_SIN(TAILQ_FIRST(&V_in_ifaddrhead))->sin_addr;
1050 IN_IFADDR_RUNLOCK(&in_ifa_tracker);
1051 if (cred != NULL &&
1052 (error = prison_get_ip4(cred, &faddr)) != 0)
1053 return (error);
1054 } else if (faddr.s_addr == (u_long)INADDR_BROADCAST) {
1055 IN_IFADDR_RLOCK(&in_ifa_tracker);
1056 if (TAILQ_FIRST(&V_in_ifaddrhead)->ia_ifp->if_flags &
1057 IFF_BROADCAST)
1058 faddr = satosin(&TAILQ_FIRST(
1059 &V_in_ifaddrhead)->ia_broadaddr)->sin_addr;
1060 IN_IFADDR_RUNLOCK(&in_ifa_tracker);
1061 }
1062 }
1063 if (laddr.s_addr == INADDR_ANY) {
1064 error = in_pcbladdr(inp, &faddr, &laddr, cred);
1065 /*
1066 * If the destination address is multicast and an outgoing
1067 * interface has been set as a multicast option, prefer the
1068 * address of that interface as our source address.
1069 */
1070 if (IN_MULTICAST(ntohl(faddr.s_addr)) &&
1071 inp->inp_moptions != NULL) {
1072 struct ip_moptions *imo;
1073 struct ifnet *ifp;
1074
1075 imo = inp->inp_moptions;
1076 if (imo->imo_multicast_ifp != NULL) {
1077 ifp = imo->imo_multicast_ifp;
1078 IN_IFADDR_RLOCK(&in_ifa_tracker);
1079 TAILQ_FOREACH(ia, &V_in_ifaddrhead, ia_link) {
1080 if ((ia->ia_ifp == ifp) &&
1081 (cred == NULL ||
1082 prison_check_ip4(cred,
1083 &ia->ia_addr.sin_addr) == 0))
1084 break;
1085 }
1086 if (ia == NULL)
1087 error = EADDRNOTAVAIL;
1088 else {
1089 laddr = ia->ia_addr.sin_addr;
1090 error = 0;
1091 }
1092 IN_IFADDR_RUNLOCK(&in_ifa_tracker);
1093 }
1094 }
1095 if (error)
1096 return (error);
1097 }
1098 oinp = in_pcblookup_hash_locked(inp->inp_pcbinfo, faddr, fport,
1099 laddr, lport, 0, NULL);
1100 if (oinp != NULL) {
1101 if (oinpp != NULL)
1102 *oinpp = oinp;
1103 return (EADDRINUSE);
1104 }
1105 if (lport == 0) {
1106 error = in_pcbbind_setup(inp, NULL, &laddr.s_addr, &lport,
1107 cred);
1108 if (error)
1109 return (error);
1110 }
1111 *laddrp = laddr.s_addr;
1112 *lportp = lport;
1113 *faddrp = faddr.s_addr;
1114 *fportp = fport;
1115 return (0);
1116 }
1117
1118 void
1119 in_pcbdisconnect(struct inpcb *inp)
1120 {
1121
1122 INP_WLOCK_ASSERT(inp);
1123 INP_HASH_WLOCK_ASSERT(inp->inp_pcbinfo);
1124
1125 inp->inp_faddr.s_addr = INADDR_ANY;
1126 inp->inp_fport = 0;
1127 in_pcbrehash(inp);
1128 }
1129 #endif /* INET */
1130
1131 /*
1132 * in_pcbdetach() is responsibe for disassociating a socket from an inpcb.
1133 * For most protocols, this will be invoked immediately prior to calling
1134 * in_pcbfree(). However, with TCP the inpcb may significantly outlive the
1135 * socket, in which case in_pcbfree() is deferred.
1136 */
1137 void
1138 in_pcbdetach(struct inpcb *inp)
1139 {
1140
1141 KASSERT(inp->inp_socket != NULL, ("%s: inp_socket == NULL", __func__));
1142
1143 inp->inp_socket->so_pcb = NULL;
1144 inp->inp_socket = NULL;
1145 }
1146
1147 /*
1148 * in_pcbref() bumps the reference count on an inpcb in order to maintain
1149 * stability of an inpcb pointer despite the inpcb lock being released. This
1150 * is used in TCP when the inpcbinfo lock needs to be acquired or upgraded,
1151 * but where the inpcb lock may already held, or when acquiring a reference
1152 * via a pcbgroup.
1153 *
1154 * in_pcbref() should be used only to provide brief memory stability, and
1155 * must always be followed by a call to INP_WLOCK() and in_pcbrele() to
1156 * garbage collect the inpcb if it has been in_pcbfree()'d from another
1157 * context. Until in_pcbrele() has returned that the inpcb is still valid,
1158 * lock and rele are the *only* safe operations that may be performed on the
1159 * inpcb.
1160 *
1161 * While the inpcb will not be freed, releasing the inpcb lock means that the
1162 * connection's state may change, so the caller should be careful to
1163 * revalidate any cached state on reacquiring the lock. Drop the reference
1164 * using in_pcbrele().
1165 */
1166 void
1167 in_pcbref(struct inpcb *inp)
1168 {
1169
1170 KASSERT(inp->inp_refcount > 0, ("%s: refcount 0", __func__));
1171
1172 refcount_acquire(&inp->inp_refcount);
1173 }
1174
1175 /*
1176 * Drop a refcount on an inpcb elevated using in_pcbref(); because a call to
1177 * in_pcbfree() may have been made between in_pcbref() and in_pcbrele(), we
1178 * return a flag indicating whether or not the inpcb remains valid. If it is
1179 * valid, we return with the inpcb lock held.
1180 *
1181 * Notice that, unlike in_pcbref(), the inpcb lock must be held to drop a
1182 * reference on an inpcb. Historically more work was done here (actually, in
1183 * in_pcbfree_internal()) but has been moved to in_pcbfree() to avoid the
1184 * need for the pcbinfo lock in in_pcbrele(). Deferring the free is entirely
1185 * about memory stability (and continued use of the write lock).
1186 */
1187 int
1188 in_pcbrele_rlocked(struct inpcb *inp)
1189 {
1190 struct inpcbinfo *pcbinfo;
1191
1192 KASSERT(inp->inp_refcount > 0, ("%s: refcount 0", __func__));
1193
1194 INP_RLOCK_ASSERT(inp);
1195
1196 if (refcount_release(&inp->inp_refcount) == 0) {
1197 /*
1198 * If the inpcb has been freed, let the caller know, even if
1199 * this isn't the last reference.
1200 */
1201 if (inp->inp_flags2 & INP_FREED) {
1202 INP_RUNLOCK(inp);
1203 return (1);
1204 }
1205 return (0);
1206 }
1207
1208 KASSERT(inp->inp_socket == NULL, ("%s: inp_socket != NULL", __func__));
1209
1210 INP_RUNLOCK(inp);
1211 pcbinfo = inp->inp_pcbinfo;
1212 uma_zfree(pcbinfo->ipi_zone, inp);
1213 return (1);
1214 }
1215
1216 int
1217 in_pcbrele_wlocked(struct inpcb *inp)
1218 {
1219 struct inpcbinfo *pcbinfo;
1220
1221 KASSERT(inp->inp_refcount > 0, ("%s: refcount 0", __func__));
1222
1223 INP_WLOCK_ASSERT(inp);
1224
1225 if (refcount_release(&inp->inp_refcount) == 0) {
1226 /*
1227 * If the inpcb has been freed, let the caller know, even if
1228 * this isn't the last reference.
1229 */
1230 if (inp->inp_flags2 & INP_FREED) {
1231 INP_WUNLOCK(inp);
1232 return (1);
1233 }
1234 return (0);
1235 }
1236
1237 KASSERT(inp->inp_socket == NULL, ("%s: inp_socket != NULL", __func__));
1238
1239 INP_WUNLOCK(inp);
1240 pcbinfo = inp->inp_pcbinfo;
1241 uma_zfree(pcbinfo->ipi_zone, inp);
1242 return (1);
1243 }
1244
1245 /*
1246 * Temporary wrapper.
1247 */
1248 int
1249 in_pcbrele(struct inpcb *inp)
1250 {
1251
1252 return (in_pcbrele_wlocked(inp));
1253 }
1254
1255 /*
1256 * Unconditionally schedule an inpcb to be freed by decrementing its
1257 * reference count, which should occur only after the inpcb has been detached
1258 * from its socket. If another thread holds a temporary reference (acquired
1259 * using in_pcbref()) then the free is deferred until that reference is
1260 * released using in_pcbrele(), but the inpcb is still unlocked. Almost all
1261 * work, including removal from global lists, is done in this context, where
1262 * the pcbinfo lock is held.
1263 */
1264 void
1265 in_pcbfree(struct inpcb *inp)
1266 {
1267 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
1268
1269 KASSERT(inp->inp_socket == NULL, ("%s: inp_socket != NULL", __func__));
1270
1271 #ifdef INVARIANTS
1272 if (pcbinfo == &V_tcbinfo) {
1273 INP_INFO_LOCK_ASSERT(pcbinfo);
1274 } else {
1275 INP_INFO_WLOCK_ASSERT(pcbinfo);
1276 }
1277 #endif
1278 INP_WLOCK_ASSERT(inp);
1279
1280 /* XXXRW: Do as much as possible here. */
1281 #ifdef IPSEC
1282 if (inp->inp_sp != NULL)
1283 ipsec_delete_pcbpolicy(inp);
1284 #endif
1285 INP_LIST_WLOCK(pcbinfo);
1286 inp->inp_gencnt = ++pcbinfo->ipi_gencnt;
1287 in_pcbremlists(inp);
1288 INP_LIST_WUNLOCK(pcbinfo);
1289 #ifdef INET6
1290 if (inp->inp_vflag & INP_IPV6PROTO) {
1291 ip6_freepcbopts(inp->in6p_outputopts);
1292 if (inp->in6p_moptions != NULL)
1293 ip6_freemoptions(inp->in6p_moptions);
1294 }
1295 #endif
1296 if (inp->inp_options)
1297 (void)m_free(inp->inp_options);
1298 #ifdef INET
1299 if (inp->inp_moptions != NULL)
1300 inp_freemoptions(inp->inp_moptions);
1301 #endif
1302 if (inp->inp_route.ro_rt) {
1303 RTFREE(inp->inp_route.ro_rt);
1304 inp->inp_route.ro_rt = (struct rtentry *)NULL;
1305 }
1306 if (inp->inp_route.ro_lle)
1307 LLE_FREE(inp->inp_route.ro_lle); /* zeros ro_lle */
1308
1309 inp->inp_vflag = 0;
1310 inp->inp_flags2 |= INP_FREED;
1311 crfree(inp->inp_cred);
1312 #ifdef MAC
1313 mac_inpcb_destroy(inp);
1314 #endif
1315 if (!in_pcbrele_wlocked(inp))
1316 INP_WUNLOCK(inp);
1317 }
1318
1319 /*
1320 * in_pcbdrop() removes an inpcb from hashed lists, releasing its address and
1321 * port reservation, and preventing it from being returned by inpcb lookups.
1322 *
1323 * It is used by TCP to mark an inpcb as unused and avoid future packet
1324 * delivery or event notification when a socket remains open but TCP has
1325 * closed. This might occur as a result of a shutdown()-initiated TCP close
1326 * or a RST on the wire, and allows the port binding to be reused while still
1327 * maintaining the invariant that so_pcb always points to a valid inpcb until
1328 * in_pcbdetach().
1329 *
1330 * XXXRW: Possibly in_pcbdrop() should also prevent future notifications by
1331 * in_pcbnotifyall() and in_pcbpurgeif0()?
1332 */
1333 void
1334 in_pcbdrop(struct inpcb *inp)
1335 {
1336
1337 INP_WLOCK_ASSERT(inp);
1338
1339 /*
1340 * XXXRW: Possibly we should protect the setting of INP_DROPPED with
1341 * the hash lock...?
1342 */
1343 inp->inp_flags |= INP_DROPPED;
1344 if (inp->inp_flags & INP_INHASHLIST) {
1345 struct inpcbport *phd = inp->inp_phd;
1346
1347 INP_HASH_WLOCK(inp->inp_pcbinfo);
1348 LIST_REMOVE(inp, inp_hash);
1349 LIST_REMOVE(inp, inp_portlist);
1350 if (LIST_FIRST(&phd->phd_pcblist) == NULL) {
1351 LIST_REMOVE(phd, phd_hash);
1352 free(phd, M_PCB);
1353 }
1354 INP_HASH_WUNLOCK(inp->inp_pcbinfo);
1355 inp->inp_flags &= ~INP_INHASHLIST;
1356 #ifdef PCBGROUP
1357 in_pcbgroup_remove(inp);
1358 #endif
1359 }
1360 }
1361
1362 #ifdef INET
1363 /*
1364 * Common routines to return the socket addresses associated with inpcbs.
1365 */
1366 struct sockaddr *
1367 in_sockaddr(in_port_t port, struct in_addr *addr_p)
1368 {
1369 struct sockaddr_in *sin;
1370
1371 sin = malloc(sizeof *sin, M_SONAME,
1372 M_WAITOK | M_ZERO);
1373 sin->sin_family = AF_INET;
1374 sin->sin_len = sizeof(*sin);
1375 sin->sin_addr = *addr_p;
1376 sin->sin_port = port;
1377
1378 return (struct sockaddr *)sin;
1379 }
1380
1381 int
1382 in_getsockaddr(struct socket *so, struct sockaddr **nam)
1383 {
1384 struct inpcb *inp;
1385 struct in_addr addr;
1386 in_port_t port;
1387
1388 inp = sotoinpcb(so);
1389 KASSERT(inp != NULL, ("in_getsockaddr: inp == NULL"));
1390
1391 INP_RLOCK(inp);
1392 port = inp->inp_lport;
1393 addr = inp->inp_laddr;
1394 INP_RUNLOCK(inp);
1395
1396 *nam = in_sockaddr(port, &addr);
1397 return 0;
1398 }
1399
1400 int
1401 in_getpeeraddr(struct socket *so, struct sockaddr **nam)
1402 {
1403 struct inpcb *inp;
1404 struct in_addr addr;
1405 in_port_t port;
1406
1407 inp = sotoinpcb(so);
1408 KASSERT(inp != NULL, ("in_getpeeraddr: inp == NULL"));
1409
1410 INP_RLOCK(inp);
1411 port = inp->inp_fport;
1412 addr = inp->inp_faddr;
1413 INP_RUNLOCK(inp);
1414
1415 *nam = in_sockaddr(port, &addr);
1416 return 0;
1417 }
1418
1419 void
1420 in_pcbnotifyall(struct inpcbinfo *pcbinfo, struct in_addr faddr, int errno,
1421 struct inpcb *(*notify)(struct inpcb *, int))
1422 {
1423 struct inpcb *inp, *inp_temp;
1424
1425 INP_INFO_WLOCK(pcbinfo);
1426 LIST_FOREACH_SAFE(inp, pcbinfo->ipi_listhead, inp_list, inp_temp) {
1427 INP_WLOCK(inp);
1428 #ifdef INET6
1429 if ((inp->inp_vflag & INP_IPV4) == 0) {
1430 INP_WUNLOCK(inp);
1431 continue;
1432 }
1433 #endif
1434 if (inp->inp_faddr.s_addr != faddr.s_addr ||
1435 inp->inp_socket == NULL) {
1436 INP_WUNLOCK(inp);
1437 continue;
1438 }
1439 if ((*notify)(inp, errno))
1440 INP_WUNLOCK(inp);
1441 }
1442 INP_INFO_WUNLOCK(pcbinfo);
1443 }
1444
1445 void
1446 in_pcbpurgeif0(struct inpcbinfo *pcbinfo, struct ifnet *ifp)
1447 {
1448 struct inpcb *inp;
1449 struct ip_moptions *imo;
1450 int i, gap;
1451
1452 INP_INFO_WLOCK(pcbinfo);
1453 LIST_FOREACH(inp, pcbinfo->ipi_listhead, inp_list) {
1454 INP_WLOCK(inp);
1455 imo = inp->inp_moptions;
1456 if ((inp->inp_vflag & INP_IPV4) &&
1457 imo != NULL) {
1458 /*
1459 * Unselect the outgoing interface if it is being
1460 * detached.
1461 */
1462 if (imo->imo_multicast_ifp == ifp)
1463 imo->imo_multicast_ifp = NULL;
1464
1465 /*
1466 * Drop multicast group membership if we joined
1467 * through the interface being detached.
1468 */
1469 for (i = 0, gap = 0; i < imo->imo_num_memberships;
1470 i++) {
1471 if (imo->imo_membership[i]->inm_ifp == ifp) {
1472 in_delmulti(imo->imo_membership[i]);
1473 gap++;
1474 } else if (gap != 0)
1475 imo->imo_membership[i - gap] =
1476 imo->imo_membership[i];
1477 }
1478 imo->imo_num_memberships -= gap;
1479 }
1480 INP_WUNLOCK(inp);
1481 }
1482 INP_INFO_WUNLOCK(pcbinfo);
1483 }
1484
1485 /*
1486 * Lookup a PCB based on the local address and port. Caller must hold the
1487 * hash lock. No inpcb locks or references are acquired.
1488 */
1489 #define INP_LOOKUP_MAPPED_PCB_COST 3
1490 struct inpcb *
1491 in_pcblookup_local(struct inpcbinfo *pcbinfo, struct in_addr laddr,
1492 u_short lport, int lookupflags, struct ucred *cred)
1493 {
1494 struct inpcb *inp;
1495 #ifdef INET6
1496 int matchwild = 3 + INP_LOOKUP_MAPPED_PCB_COST;
1497 #else
1498 int matchwild = 3;
1499 #endif
1500 int wildcard;
1501
1502 KASSERT((lookupflags & ~(INPLOOKUP_WILDCARD)) == 0,
1503 ("%s: invalid lookup flags %d", __func__, lookupflags));
1504
1505 INP_HASH_LOCK_ASSERT(pcbinfo);
1506
1507 if ((lookupflags & INPLOOKUP_WILDCARD) == 0) {
1508 struct inpcbhead *head;
1509 /*
1510 * Look for an unconnected (wildcard foreign addr) PCB that
1511 * matches the local address and port we're looking for.
1512 */
1513 head = &pcbinfo->ipi_hashbase[INP_PCBHASH(INADDR_ANY, lport,
1514 0, pcbinfo->ipi_hashmask)];
1515 LIST_FOREACH(inp, head, inp_hash) {
1516 #ifdef INET6
1517 /* XXX inp locking */
1518 if ((inp->inp_vflag & INP_IPV4) == 0)
1519 continue;
1520 #endif
1521 if (inp->inp_faddr.s_addr == INADDR_ANY &&
1522 inp->inp_laddr.s_addr == laddr.s_addr &&
1523 inp->inp_lport == lport) {
1524 /*
1525 * Found?
1526 */
1527 if (cred == NULL ||
1528 prison_equal_ip4(cred->cr_prison,
1529 inp->inp_cred->cr_prison))
1530 return (inp);
1531 }
1532 }
1533 /*
1534 * Not found.
1535 */
1536 return (NULL);
1537 } else {
1538 struct inpcbporthead *porthash;
1539 struct inpcbport *phd;
1540 struct inpcb *match = NULL;
1541 /*
1542 * Best fit PCB lookup.
1543 *
1544 * First see if this local port is in use by looking on the
1545 * port hash list.
1546 */
1547 porthash = &pcbinfo->ipi_porthashbase[INP_PCBPORTHASH(lport,
1548 pcbinfo->ipi_porthashmask)];
1549 LIST_FOREACH(phd, porthash, phd_hash) {
1550 if (phd->phd_port == lport)
1551 break;
1552 }
1553 if (phd != NULL) {
1554 /*
1555 * Port is in use by one or more PCBs. Look for best
1556 * fit.
1557 */
1558 LIST_FOREACH(inp, &phd->phd_pcblist, inp_portlist) {
1559 wildcard = 0;
1560 if (cred != NULL &&
1561 !prison_equal_ip4(inp->inp_cred->cr_prison,
1562 cred->cr_prison))
1563 continue;
1564 #ifdef INET6
1565 /* XXX inp locking */
1566 if ((inp->inp_vflag & INP_IPV4) == 0)
1567 continue;
1568 /*
1569 * We never select the PCB that has
1570 * INP_IPV6 flag and is bound to :: if
1571 * we have another PCB which is bound
1572 * to 0.0.0.0. If a PCB has the
1573 * INP_IPV6 flag, then we set its cost
1574 * higher than IPv4 only PCBs.
1575 *
1576 * Note that the case only happens
1577 * when a socket is bound to ::, under
1578 * the condition that the use of the
1579 * mapped address is allowed.
1580 */
1581 if ((inp->inp_vflag & INP_IPV6) != 0)
1582 wildcard += INP_LOOKUP_MAPPED_PCB_COST;
1583 #endif
1584 if (inp->inp_faddr.s_addr != INADDR_ANY)
1585 wildcard++;
1586 if (inp->inp_laddr.s_addr != INADDR_ANY) {
1587 if (laddr.s_addr == INADDR_ANY)
1588 wildcard++;
1589 else if (inp->inp_laddr.s_addr != laddr.s_addr)
1590 continue;
1591 } else {
1592 if (laddr.s_addr != INADDR_ANY)
1593 wildcard++;
1594 }
1595 if (wildcard < matchwild) {
1596 match = inp;
1597 matchwild = wildcard;
1598 if (matchwild == 0)
1599 break;
1600 }
1601 }
1602 }
1603 return (match);
1604 }
1605 }
1606 #undef INP_LOOKUP_MAPPED_PCB_COST
1607
1608 #ifdef PCBGROUP
1609 /*
1610 * Lookup PCB in hash list, using pcbgroup tables.
1611 */
1612 static struct inpcb *
1613 in_pcblookup_group(struct inpcbinfo *pcbinfo, struct inpcbgroup *pcbgroup,
1614 struct in_addr faddr, u_int fport_arg, struct in_addr laddr,
1615 u_int lport_arg, int lookupflags, struct ifnet *ifp)
1616 {
1617 struct inpcbhead *head;
1618 struct inpcb *inp, *tmpinp;
1619 u_short fport = fport_arg, lport = lport_arg;
1620
1621 /*
1622 * First look for an exact match.
1623 */
1624 tmpinp = NULL;
1625 INP_GROUP_LOCK(pcbgroup);
1626 head = &pcbgroup->ipg_hashbase[INP_PCBHASH(faddr.s_addr, lport, fport,
1627 pcbgroup->ipg_hashmask)];
1628 LIST_FOREACH(inp, head, inp_pcbgrouphash) {
1629 #ifdef INET6
1630 /* XXX inp locking */
1631 if ((inp->inp_vflag & INP_IPV4) == 0)
1632 continue;
1633 #endif
1634 if (inp->inp_faddr.s_addr == faddr.s_addr &&
1635 inp->inp_laddr.s_addr == laddr.s_addr &&
1636 inp->inp_fport == fport &&
1637 inp->inp_lport == lport) {
1638 /*
1639 * XXX We should be able to directly return
1640 * the inp here, without any checks.
1641 * Well unless both bound with SO_REUSEPORT?
1642 */
1643 if (prison_flag(inp->inp_cred, PR_IP4))
1644 goto found;
1645 if (tmpinp == NULL)
1646 tmpinp = inp;
1647 }
1648 }
1649 if (tmpinp != NULL) {
1650 inp = tmpinp;
1651 goto found;
1652 }
1653
1654 #ifdef RSS
1655 /*
1656 * For incoming connections, we may wish to do a wildcard
1657 * match for an RSS-local socket.
1658 */
1659 if ((lookupflags & INPLOOKUP_WILDCARD) != 0) {
1660 struct inpcb *local_wild = NULL, *local_exact = NULL;
1661 #ifdef INET6
1662 struct inpcb *local_wild_mapped = NULL;
1663 #endif
1664 struct inpcb *jail_wild = NULL;
1665 struct inpcbhead *head;
1666 int injail;
1667
1668 /*
1669 * Order of socket selection - we always prefer jails.
1670 * 1. jailed, non-wild.
1671 * 2. jailed, wild.
1672 * 3. non-jailed, non-wild.
1673 * 4. non-jailed, wild.
1674 */
1675
1676 head = &pcbgroup->ipg_hashbase[INP_PCBHASH(INADDR_ANY,
1677 lport, 0, pcbgroup->ipg_hashmask)];
1678 LIST_FOREACH(inp, head, inp_pcbgrouphash) {
1679 #ifdef INET6
1680 /* XXX inp locking */
1681 if ((inp->inp_vflag & INP_IPV4) == 0)
1682 continue;
1683 #endif
1684 if (inp->inp_faddr.s_addr != INADDR_ANY ||
1685 inp->inp_lport != lport)
1686 continue;
1687
1688 injail = prison_flag(inp->inp_cred, PR_IP4);
1689 if (injail) {
1690 if (prison_check_ip4(inp->inp_cred,
1691 &laddr) != 0)
1692 continue;
1693 } else {
1694 if (local_exact != NULL)
1695 continue;
1696 }
1697
1698 if (inp->inp_laddr.s_addr == laddr.s_addr) {
1699 if (injail)
1700 goto found;
1701 else
1702 local_exact = inp;
1703 } else if (inp->inp_laddr.s_addr == INADDR_ANY) {
1704 #ifdef INET6
1705 /* XXX inp locking, NULL check */
1706 if (inp->inp_vflag & INP_IPV6PROTO)
1707 local_wild_mapped = inp;
1708 else
1709 #endif
1710 if (injail)
1711 jail_wild = inp;
1712 else
1713 local_wild = inp;
1714 }
1715 } /* LIST_FOREACH */
1716
1717 inp = jail_wild;
1718 if (inp == NULL)
1719 inp = local_exact;
1720 if (inp == NULL)
1721 inp = local_wild;
1722 #ifdef INET6
1723 if (inp == NULL)
1724 inp = local_wild_mapped;
1725 #endif
1726 if (inp != NULL)
1727 goto found;
1728 }
1729 #endif
1730
1731 /*
1732 * Then look for a wildcard match, if requested.
1733 */
1734 if ((lookupflags & INPLOOKUP_WILDCARD) != 0) {
1735 struct inpcb *local_wild = NULL, *local_exact = NULL;
1736 #ifdef INET6
1737 struct inpcb *local_wild_mapped = NULL;
1738 #endif
1739 struct inpcb *jail_wild = NULL;
1740 struct inpcbhead *head;
1741 int injail;
1742
1743 /*
1744 * Order of socket selection - we always prefer jails.
1745 * 1. jailed, non-wild.
1746 * 2. jailed, wild.
1747 * 3. non-jailed, non-wild.
1748 * 4. non-jailed, wild.
1749 */
1750 head = &pcbinfo->ipi_wildbase[INP_PCBHASH(INADDR_ANY, lport,
1751 0, pcbinfo->ipi_wildmask)];
1752 LIST_FOREACH(inp, head, inp_pcbgroup_wild) {
1753 #ifdef INET6
1754 /* XXX inp locking */
1755 if ((inp->inp_vflag & INP_IPV4) == 0)
1756 continue;
1757 #endif
1758 if (inp->inp_faddr.s_addr != INADDR_ANY ||
1759 inp->inp_lport != lport)
1760 continue;
1761
1762 injail = prison_flag(inp->inp_cred, PR_IP4);
1763 if (injail) {
1764 if (prison_check_ip4(inp->inp_cred,
1765 &laddr) != 0)
1766 continue;
1767 } else {
1768 if (local_exact != NULL)
1769 continue;
1770 }
1771
1772 if (inp->inp_laddr.s_addr == laddr.s_addr) {
1773 if (injail)
1774 goto found;
1775 else
1776 local_exact = inp;
1777 } else if (inp->inp_laddr.s_addr == INADDR_ANY) {
1778 #ifdef INET6
1779 /* XXX inp locking, NULL check */
1780 if (inp->inp_vflag & INP_IPV6PROTO)
1781 local_wild_mapped = inp;
1782 else
1783 #endif
1784 if (injail)
1785 jail_wild = inp;
1786 else
1787 local_wild = inp;
1788 }
1789 } /* LIST_FOREACH */
1790 inp = jail_wild;
1791 if (inp == NULL)
1792 inp = local_exact;
1793 if (inp == NULL)
1794 inp = local_wild;
1795 #ifdef INET6
1796 if (inp == NULL)
1797 inp = local_wild_mapped;
1798 #endif
1799 if (inp != NULL)
1800 goto found;
1801 } /* if (lookupflags & INPLOOKUP_WILDCARD) */
1802 INP_GROUP_UNLOCK(pcbgroup);
1803 return (NULL);
1804
1805 found:
1806 in_pcbref(inp);
1807 INP_GROUP_UNLOCK(pcbgroup);
1808 if (lookupflags & INPLOOKUP_WLOCKPCB) {
1809 INP_WLOCK(inp);
1810 if (in_pcbrele_wlocked(inp))
1811 return (NULL);
1812 } else if (lookupflags & INPLOOKUP_RLOCKPCB) {
1813 INP_RLOCK(inp);
1814 if (in_pcbrele_rlocked(inp))
1815 return (NULL);
1816 } else
1817 panic("%s: locking bug", __func__);
1818 return (inp);
1819 }
1820 #endif /* PCBGROUP */
1821
1822 /*
1823 * Lookup PCB in hash list, using pcbinfo tables. This variation assumes
1824 * that the caller has locked the hash list, and will not perform any further
1825 * locking or reference operations on either the hash list or the connection.
1826 */
1827 static struct inpcb *
1828 in_pcblookup_hash_locked(struct inpcbinfo *pcbinfo, struct in_addr faddr,
1829 u_int fport_arg, struct in_addr laddr, u_int lport_arg, int lookupflags,
1830 struct ifnet *ifp)
1831 {
1832 struct inpcbhead *head;
1833 struct inpcb *inp, *tmpinp;
1834 u_short fport = fport_arg, lport = lport_arg;
1835
1836 KASSERT((lookupflags & ~(INPLOOKUP_WILDCARD)) == 0,
1837 ("%s: invalid lookup flags %d", __func__, lookupflags));
1838
1839 INP_HASH_LOCK_ASSERT(pcbinfo);
1840
1841 /*
1842 * First look for an exact match.
1843 */
1844 tmpinp = NULL;
1845 head = &pcbinfo->ipi_hashbase[INP_PCBHASH(faddr.s_addr, lport, fport,
1846 pcbinfo->ipi_hashmask)];
1847 LIST_FOREACH(inp, head, inp_hash) {
1848 #ifdef INET6
1849 /* XXX inp locking */
1850 if ((inp->inp_vflag & INP_IPV4) == 0)
1851 continue;
1852 #endif
1853 if (inp->inp_faddr.s_addr == faddr.s_addr &&
1854 inp->inp_laddr.s_addr == laddr.s_addr &&
1855 inp->inp_fport == fport &&
1856 inp->inp_lport == lport) {
1857 /*
1858 * XXX We should be able to directly return
1859 * the inp here, without any checks.
1860 * Well unless both bound with SO_REUSEPORT?
1861 */
1862 if (prison_flag(inp->inp_cred, PR_IP4))
1863 return (inp);
1864 if (tmpinp == NULL)
1865 tmpinp = inp;
1866 }
1867 }
1868 if (tmpinp != NULL)
1869 return (tmpinp);
1870
1871 /*
1872 * Then look for a wildcard match, if requested.
1873 */
1874 if ((lookupflags & INPLOOKUP_WILDCARD) != 0) {
1875 struct inpcb *local_wild = NULL, *local_exact = NULL;
1876 #ifdef INET6
1877 struct inpcb *local_wild_mapped = NULL;
1878 #endif
1879 struct inpcb *jail_wild = NULL;
1880 int injail;
1881
1882 /*
1883 * Order of socket selection - we always prefer jails.
1884 * 1. jailed, non-wild.
1885 * 2. jailed, wild.
1886 * 3. non-jailed, non-wild.
1887 * 4. non-jailed, wild.
1888 */
1889
1890 head = &pcbinfo->ipi_hashbase[INP_PCBHASH(INADDR_ANY, lport,
1891 0, pcbinfo->ipi_hashmask)];
1892 LIST_FOREACH(inp, head, inp_hash) {
1893 #ifdef INET6
1894 /* XXX inp locking */
1895 if ((inp->inp_vflag & INP_IPV4) == 0)
1896 continue;
1897 #endif
1898 if (inp->inp_faddr.s_addr != INADDR_ANY ||
1899 inp->inp_lport != lport)
1900 continue;
1901
1902 injail = prison_flag(inp->inp_cred, PR_IP4);
1903 if (injail) {
1904 if (prison_check_ip4(inp->inp_cred,
1905 &laddr) != 0)
1906 continue;
1907 } else {
1908 if (local_exact != NULL)
1909 continue;
1910 }
1911
1912 if (inp->inp_laddr.s_addr == laddr.s_addr) {
1913 if (injail)
1914 return (inp);
1915 else
1916 local_exact = inp;
1917 } else if (inp->inp_laddr.s_addr == INADDR_ANY) {
1918 #ifdef INET6
1919 /* XXX inp locking, NULL check */
1920 if (inp->inp_vflag & INP_IPV6PROTO)
1921 local_wild_mapped = inp;
1922 else
1923 #endif
1924 if (injail)
1925 jail_wild = inp;
1926 else
1927 local_wild = inp;
1928 }
1929 } /* LIST_FOREACH */
1930 if (jail_wild != NULL)
1931 return (jail_wild);
1932 if (local_exact != NULL)
1933 return (local_exact);
1934 if (local_wild != NULL)
1935 return (local_wild);
1936 #ifdef INET6
1937 if (local_wild_mapped != NULL)
1938 return (local_wild_mapped);
1939 #endif
1940 } /* if ((lookupflags & INPLOOKUP_WILDCARD) != 0) */
1941
1942 return (NULL);
1943 }
1944
1945 /*
1946 * Lookup PCB in hash list, using pcbinfo tables. This variation locks the
1947 * hash list lock, and will return the inpcb locked (i.e., requires
1948 * INPLOOKUP_LOCKPCB).
1949 */
1950 static struct inpcb *
1951 in_pcblookup_hash(struct inpcbinfo *pcbinfo, struct in_addr faddr,
1952 u_int fport, struct in_addr laddr, u_int lport, int lookupflags,
1953 struct ifnet *ifp)
1954 {
1955 struct inpcb *inp;
1956
1957 INP_HASH_RLOCK(pcbinfo);
1958 inp = in_pcblookup_hash_locked(pcbinfo, faddr, fport, laddr, lport,
1959 (lookupflags & ~(INPLOOKUP_RLOCKPCB | INPLOOKUP_WLOCKPCB)), ifp);
1960 if (inp != NULL) {
1961 in_pcbref(inp);
1962 INP_HASH_RUNLOCK(pcbinfo);
1963 if (lookupflags & INPLOOKUP_WLOCKPCB) {
1964 INP_WLOCK(inp);
1965 if (in_pcbrele_wlocked(inp))
1966 return (NULL);
1967 } else if (lookupflags & INPLOOKUP_RLOCKPCB) {
1968 INP_RLOCK(inp);
1969 if (in_pcbrele_rlocked(inp))
1970 return (NULL);
1971 } else
1972 panic("%s: locking bug", __func__);
1973 } else
1974 INP_HASH_RUNLOCK(pcbinfo);
1975 return (inp);
1976 }
1977
1978 /*
1979 * Public inpcb lookup routines, accepting a 4-tuple, and optionally, an mbuf
1980 * from which a pre-calculated hash value may be extracted.
1981 *
1982 * Possibly more of this logic should be in in_pcbgroup.c.
1983 */
1984 struct inpcb *
1985 in_pcblookup(struct inpcbinfo *pcbinfo, struct in_addr faddr, u_int fport,
1986 struct in_addr laddr, u_int lport, int lookupflags, struct ifnet *ifp)
1987 {
1988 #if defined(PCBGROUP) && !defined(RSS)
1989 struct inpcbgroup *pcbgroup;
1990 #endif
1991
1992 KASSERT((lookupflags & ~INPLOOKUP_MASK) == 0,
1993 ("%s: invalid lookup flags %d", __func__, lookupflags));
1994 KASSERT((lookupflags & (INPLOOKUP_RLOCKPCB | INPLOOKUP_WLOCKPCB)) != 0,
1995 ("%s: LOCKPCB not set", __func__));
1996
1997 /*
1998 * When not using RSS, use connection groups in preference to the
1999 * reservation table when looking up 4-tuples. When using RSS, just
2000 * use the reservation table, due to the cost of the Toeplitz hash
2001 * in software.
2002 *
2003 * XXXRW: This policy belongs in the pcbgroup code, as in principle
2004 * we could be doing RSS with a non-Toeplitz hash that is affordable
2005 * in software.
2006 */
2007 #if defined(PCBGROUP) && !defined(RSS)
2008 if (in_pcbgroup_enabled(pcbinfo)) {
2009 pcbgroup = in_pcbgroup_bytuple(pcbinfo, laddr, lport, faddr,
2010 fport);
2011 return (in_pcblookup_group(pcbinfo, pcbgroup, faddr, fport,
2012 laddr, lport, lookupflags, ifp));
2013 }
2014 #endif
2015 return (in_pcblookup_hash(pcbinfo, faddr, fport, laddr, lport,
2016 lookupflags, ifp));
2017 }
2018
2019 struct inpcb *
2020 in_pcblookup_mbuf(struct inpcbinfo *pcbinfo, struct in_addr faddr,
2021 u_int fport, struct in_addr laddr, u_int lport, int lookupflags,
2022 struct ifnet *ifp, struct mbuf *m)
2023 {
2024 #ifdef PCBGROUP
2025 struct inpcbgroup *pcbgroup;
2026 #endif
2027
2028 KASSERT((lookupflags & ~INPLOOKUP_MASK) == 0,
2029 ("%s: invalid lookup flags %d", __func__, lookupflags));
2030 KASSERT((lookupflags & (INPLOOKUP_RLOCKPCB | INPLOOKUP_WLOCKPCB)) != 0,
2031 ("%s: LOCKPCB not set", __func__));
2032
2033 #ifdef PCBGROUP
2034 /*
2035 * If we can use a hardware-generated hash to look up the connection
2036 * group, use that connection group to find the inpcb. Otherwise
2037 * fall back on a software hash -- or the reservation table if we're
2038 * using RSS.
2039 *
2040 * XXXRW: As above, that policy belongs in the pcbgroup code.
2041 */
2042 if (in_pcbgroup_enabled(pcbinfo) &&
2043 !(M_HASHTYPE_TEST(m, M_HASHTYPE_NONE))) {
2044 pcbgroup = in_pcbgroup_byhash(pcbinfo, M_HASHTYPE_GET(m),
2045 m->m_pkthdr.flowid);
2046 if (pcbgroup != NULL)
2047 return (in_pcblookup_group(pcbinfo, pcbgroup, faddr,
2048 fport, laddr, lport, lookupflags, ifp));
2049 #ifndef RSS
2050 pcbgroup = in_pcbgroup_bytuple(pcbinfo, laddr, lport, faddr,
2051 fport);
2052 return (in_pcblookup_group(pcbinfo, pcbgroup, faddr, fport,
2053 laddr, lport, lookupflags, ifp));
2054 #endif
2055 }
2056 #endif
2057 return (in_pcblookup_hash(pcbinfo, faddr, fport, laddr, lport,
2058 lookupflags, ifp));
2059 }
2060 #endif /* INET */
2061
2062 /*
2063 * Insert PCB onto various hash lists.
2064 */
2065 static int
2066 in_pcbinshash_internal(struct inpcb *inp, int do_pcbgroup_update)
2067 {
2068 struct inpcbhead *pcbhash;
2069 struct inpcbporthead *pcbporthash;
2070 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
2071 struct inpcbport *phd;
2072 u_int32_t hashkey_faddr;
2073
2074 INP_WLOCK_ASSERT(inp);
2075 INP_HASH_WLOCK_ASSERT(pcbinfo);
2076
2077 KASSERT((inp->inp_flags & INP_INHASHLIST) == 0,
2078 ("in_pcbinshash: INP_INHASHLIST"));
2079
2080 #ifdef INET6
2081 if (inp->inp_vflag & INP_IPV6)
2082 hashkey_faddr = INP6_PCBHASHKEY(&inp->in6p_faddr);
2083 else
2084 #endif
2085 hashkey_faddr = inp->inp_faddr.s_addr;
2086
2087 pcbhash = &pcbinfo->ipi_hashbase[INP_PCBHASH(hashkey_faddr,
2088 inp->inp_lport, inp->inp_fport, pcbinfo->ipi_hashmask)];
2089
2090 pcbporthash = &pcbinfo->ipi_porthashbase[
2091 INP_PCBPORTHASH(inp->inp_lport, pcbinfo->ipi_porthashmask)];
2092
2093 /*
2094 * Go through port list and look for a head for this lport.
2095 */
2096 LIST_FOREACH(phd, pcbporthash, phd_hash) {
2097 if (phd->phd_port == inp->inp_lport)
2098 break;
2099 }
2100 /*
2101 * If none exists, malloc one and tack it on.
2102 */
2103 if (phd == NULL) {
2104 phd = malloc(sizeof(struct inpcbport), M_PCB, M_NOWAIT);
2105 if (phd == NULL) {
2106 return (ENOBUFS); /* XXX */
2107 }
2108 phd->phd_port = inp->inp_lport;
2109 LIST_INIT(&phd->phd_pcblist);
2110 LIST_INSERT_HEAD(pcbporthash, phd, phd_hash);
2111 }
2112 inp->inp_phd = phd;
2113 LIST_INSERT_HEAD(&phd->phd_pcblist, inp, inp_portlist);
2114 LIST_INSERT_HEAD(pcbhash, inp, inp_hash);
2115 inp->inp_flags |= INP_INHASHLIST;
2116 #ifdef PCBGROUP
2117 if (do_pcbgroup_update)
2118 in_pcbgroup_update(inp);
2119 #endif
2120 return (0);
2121 }
2122
2123 /*
2124 * For now, there are two public interfaces to insert an inpcb into the hash
2125 * lists -- one that does update pcbgroups, and one that doesn't. The latter
2126 * is used only in the TCP syncache, where in_pcbinshash is called before the
2127 * full 4-tuple is set for the inpcb, and we don't want to install in the
2128 * pcbgroup until later.
2129 *
2130 * XXXRW: This seems like a misfeature. in_pcbinshash should always update
2131 * connection groups, and partially initialised inpcbs should not be exposed
2132 * to either reservation hash tables or pcbgroups.
2133 */
2134 int
2135 in_pcbinshash(struct inpcb *inp)
2136 {
2137
2138 return (in_pcbinshash_internal(inp, 1));
2139 }
2140
2141 int
2142 in_pcbinshash_nopcbgroup(struct inpcb *inp)
2143 {
2144
2145 return (in_pcbinshash_internal(inp, 0));
2146 }
2147
2148 /*
2149 * Move PCB to the proper hash bucket when { faddr, fport } have been
2150 * changed. NOTE: This does not handle the case of the lport changing (the
2151 * hashed port list would have to be updated as well), so the lport must
2152 * not change after in_pcbinshash() has been called.
2153 */
2154 void
2155 in_pcbrehash_mbuf(struct inpcb *inp, struct mbuf *m)
2156 {
2157 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
2158 struct inpcbhead *head;
2159 u_int32_t hashkey_faddr;
2160
2161 INP_WLOCK_ASSERT(inp);
2162 INP_HASH_WLOCK_ASSERT(pcbinfo);
2163
2164 KASSERT(inp->inp_flags & INP_INHASHLIST,
2165 ("in_pcbrehash: !INP_INHASHLIST"));
2166
2167 #ifdef INET6
2168 if (inp->inp_vflag & INP_IPV6)
2169 hashkey_faddr = INP6_PCBHASHKEY(&inp->in6p_faddr);
2170 else
2171 #endif
2172 hashkey_faddr = inp->inp_faddr.s_addr;
2173
2174 head = &pcbinfo->ipi_hashbase[INP_PCBHASH(hashkey_faddr,
2175 inp->inp_lport, inp->inp_fport, pcbinfo->ipi_hashmask)];
2176
2177 LIST_REMOVE(inp, inp_hash);
2178 LIST_INSERT_HEAD(head, inp, inp_hash);
2179
2180 #ifdef PCBGROUP
2181 if (m != NULL)
2182 in_pcbgroup_update_mbuf(inp, m);
2183 else
2184 in_pcbgroup_update(inp);
2185 #endif
2186 }
2187
2188 void
2189 in_pcbrehash(struct inpcb *inp)
2190 {
2191
2192 in_pcbrehash_mbuf(inp, NULL);
2193 }
2194
2195 /*
2196 * Remove PCB from various lists.
2197 */
2198 static void
2199 in_pcbremlists(struct inpcb *inp)
2200 {
2201 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
2202
2203 #ifdef INVARIANTS
2204 if (pcbinfo == &V_tcbinfo) {
2205 INP_INFO_RLOCK_ASSERT(pcbinfo);
2206 } else {
2207 INP_INFO_WLOCK_ASSERT(pcbinfo);
2208 }
2209 #endif
2210
2211 INP_WLOCK_ASSERT(inp);
2212 INP_LIST_WLOCK_ASSERT(pcbinfo);
2213
2214 inp->inp_gencnt = ++pcbinfo->ipi_gencnt;
2215 if (inp->inp_flags & INP_INHASHLIST) {
2216 struct inpcbport *phd = inp->inp_phd;
2217
2218 INP_HASH_WLOCK(pcbinfo);
2219 LIST_REMOVE(inp, inp_hash);
2220 LIST_REMOVE(inp, inp_portlist);
2221 if (LIST_FIRST(&phd->phd_pcblist) == NULL) {
2222 LIST_REMOVE(phd, phd_hash);
2223 free(phd, M_PCB);
2224 }
2225 INP_HASH_WUNLOCK(pcbinfo);
2226 inp->inp_flags &= ~INP_INHASHLIST;
2227 }
2228 LIST_REMOVE(inp, inp_list);
2229 pcbinfo->ipi_count--;
2230 #ifdef PCBGROUP
2231 in_pcbgroup_remove(inp);
2232 #endif
2233 }
2234
2235 /*
2236 * Check for alternatives when higher level complains
2237 * about service problems. For now, invalidate cached
2238 * routing information. If the route was created dynamically
2239 * (by a redirect), time to try a default gateway again.
2240 */
2241 void
2242 in_losing(struct inpcb *inp)
2243 {
2244
2245 if (inp->inp_route.ro_rt) {
2246 RTFREE(inp->inp_route.ro_rt);
2247 inp->inp_route.ro_rt = (struct rtentry *)NULL;
2248 }
2249 if (inp->inp_route.ro_lle)
2250 LLE_FREE(inp->inp_route.ro_lle); /* zeros ro_lle */
2251 return;
2252 }
2253
2254 /*
2255 * A set label operation has occurred at the socket layer, propagate the
2256 * label change into the in_pcb for the socket.
2257 */
2258 void
2259 in_pcbsosetlabel(struct socket *so)
2260 {
2261 #ifdef MAC
2262 struct inpcb *inp;
2263
2264 inp = sotoinpcb(so);
2265 KASSERT(inp != NULL, ("in_pcbsosetlabel: so->so_pcb == NULL"));
2266
2267 INP_WLOCK(inp);
2268 SOCK_LOCK(so);
2269 mac_inpcb_sosetlabel(so, inp);
2270 SOCK_UNLOCK(so);
2271 INP_WUNLOCK(inp);
2272 #endif
2273 }
2274
2275 /*
2276 * ipport_tick runs once per second, determining if random port allocation
2277 * should be continued. If more than ipport_randomcps ports have been
2278 * allocated in the last second, then we return to sequential port
2279 * allocation. We return to random allocation only once we drop below
2280 * ipport_randomcps for at least ipport_randomtime seconds.
2281 */
2282 static void
2283 ipport_tick(void *xtp)
2284 {
2285 VNET_ITERATOR_DECL(vnet_iter);
2286
2287 VNET_LIST_RLOCK_NOSLEEP();
2288 VNET_FOREACH(vnet_iter) {
2289 CURVNET_SET(vnet_iter); /* XXX appease INVARIANTS here */
2290 if (V_ipport_tcpallocs <=
2291 V_ipport_tcplastcount + V_ipport_randomcps) {
2292 if (V_ipport_stoprandom > 0)
2293 V_ipport_stoprandom--;
2294 } else
2295 V_ipport_stoprandom = V_ipport_randomtime;
2296 V_ipport_tcplastcount = V_ipport_tcpallocs;
2297 CURVNET_RESTORE();
2298 }
2299 VNET_LIST_RUNLOCK_NOSLEEP();
2300 callout_reset(&ipport_tick_callout, hz, ipport_tick, NULL);
2301 }
2302
2303 static void
2304 ip_fini(void *xtp)
2305 {
2306
2307 callout_stop(&ipport_tick_callout);
2308 }
2309
2310 /*
2311 * The ipport_callout should start running at about the time we attach the
2312 * inet or inet6 domains.
2313 */
2314 static void
2315 ipport_tick_init(const void *unused __unused)
2316 {
2317
2318 /* Start ipport_tick. */
2319 callout_init(&ipport_tick_callout, 1);
2320 callout_reset(&ipport_tick_callout, 1, ipport_tick, NULL);
2321 EVENTHANDLER_REGISTER(shutdown_pre_sync, ip_fini, NULL,
2322 SHUTDOWN_PRI_DEFAULT);
2323 }
2324 SYSINIT(ipport_tick_init, SI_SUB_PROTO_DOMAIN, SI_ORDER_MIDDLE,
2325 ipport_tick_init, NULL);
2326
2327 void
2328 inp_wlock(struct inpcb *inp)
2329 {
2330
2331 INP_WLOCK(inp);
2332 }
2333
2334 void
2335 inp_wunlock(struct inpcb *inp)
2336 {
2337
2338 INP_WUNLOCK(inp);
2339 }
2340
2341 void
2342 inp_rlock(struct inpcb *inp)
2343 {
2344
2345 INP_RLOCK(inp);
2346 }
2347
2348 void
2349 inp_runlock(struct inpcb *inp)
2350 {
2351
2352 INP_RUNLOCK(inp);
2353 }
2354
2355 #ifdef INVARIANTS
2356 void
2357 inp_lock_assert(struct inpcb *inp)
2358 {
2359
2360 INP_WLOCK_ASSERT(inp);
2361 }
2362
2363 void
2364 inp_unlock_assert(struct inpcb *inp)
2365 {
2366
2367 INP_UNLOCK_ASSERT(inp);
2368 }
2369 #endif
2370
2371 void
2372 inp_apply_all(void (*func)(struct inpcb *, void *), void *arg)
2373 {
2374 struct inpcb *inp;
2375
2376 INP_INFO_WLOCK(&V_tcbinfo);
2377 LIST_FOREACH(inp, V_tcbinfo.ipi_listhead, inp_list) {
2378 INP_WLOCK(inp);
2379 func(inp, arg);
2380 INP_WUNLOCK(inp);
2381 }
2382 INP_INFO_WUNLOCK(&V_tcbinfo);
2383 }
2384
2385 struct socket *
2386 inp_inpcbtosocket(struct inpcb *inp)
2387 {
2388
2389 INP_WLOCK_ASSERT(inp);
2390 return (inp->inp_socket);
2391 }
2392
2393 struct tcpcb *
2394 inp_inpcbtotcpcb(struct inpcb *inp)
2395 {
2396
2397 INP_WLOCK_ASSERT(inp);
2398 return ((struct tcpcb *)inp->inp_ppcb);
2399 }
2400
2401 int
2402 inp_ip_tos_get(const struct inpcb *inp)
2403 {
2404
2405 return (inp->inp_ip_tos);
2406 }
2407
2408 void
2409 inp_ip_tos_set(struct inpcb *inp, int val)
2410 {
2411
2412 inp->inp_ip_tos = val;
2413 }
2414
2415 void
2416 inp_4tuple_get(struct inpcb *inp, uint32_t *laddr, uint16_t *lp,
2417 uint32_t *faddr, uint16_t *fp)
2418 {
2419
2420 INP_LOCK_ASSERT(inp);
2421 *laddr = inp->inp_laddr.s_addr;
2422 *faddr = inp->inp_faddr.s_addr;
2423 *lp = inp->inp_lport;
2424 *fp = inp->inp_fport;
2425 }
2426
2427 struct inpcb *
2428 so_sotoinpcb(struct socket *so)
2429 {
2430
2431 return (sotoinpcb(so));
2432 }
2433
2434 struct tcpcb *
2435 so_sototcpcb(struct socket *so)
2436 {
2437
2438 return (sototcpcb(so));
2439 }
2440
2441 #ifdef DDB
2442 static void
2443 db_print_indent(int indent)
2444 {
2445 int i;
2446
2447 for (i = 0; i < indent; i++)
2448 db_printf(" ");
2449 }
2450
2451 static void
2452 db_print_inconninfo(struct in_conninfo *inc, const char *name, int indent)
2453 {
2454 char faddr_str[48], laddr_str[48];
2455
2456 db_print_indent(indent);
2457 db_printf("%s at %p\n", name, inc);
2458
2459 indent += 2;
2460
2461 #ifdef INET6
2462 if (inc->inc_flags & INC_ISIPV6) {
2463 /* IPv6. */
2464 ip6_sprintf(laddr_str, &inc->inc6_laddr);
2465 ip6_sprintf(faddr_str, &inc->inc6_faddr);
2466 } else
2467 #endif
2468 {
2469 /* IPv4. */
2470 inet_ntoa_r(inc->inc_laddr, laddr_str);
2471 inet_ntoa_r(inc->inc_faddr, faddr_str);
2472 }
2473 db_print_indent(indent);
2474 db_printf("inc_laddr %s inc_lport %u\n", laddr_str,
2475 ntohs(inc->inc_lport));
2476 db_print_indent(indent);
2477 db_printf("inc_faddr %s inc_fport %u\n", faddr_str,
2478 ntohs(inc->inc_fport));
2479 }
2480
2481 static void
2482 db_print_inpflags(int inp_flags)
2483 {
2484 int comma;
2485
2486 comma = 0;
2487 if (inp_flags & INP_RECVOPTS) {
2488 db_printf("%sINP_RECVOPTS", comma ? ", " : "");
2489 comma = 1;
2490 }
2491 if (inp_flags & INP_RECVRETOPTS) {
2492 db_printf("%sINP_RECVRETOPTS", comma ? ", " : "");
2493 comma = 1;
2494 }
2495 if (inp_flags & INP_RECVDSTADDR) {
2496 db_printf("%sINP_RECVDSTADDR", comma ? ", " : "");
2497 comma = 1;
2498 }
2499 if (inp_flags & INP_HDRINCL) {
2500 db_printf("%sINP_HDRINCL", comma ? ", " : "");
2501 comma = 1;
2502 }
2503 if (inp_flags & INP_HIGHPORT) {
2504 db_printf("%sINP_HIGHPORT", comma ? ", " : "");
2505 comma = 1;
2506 }
2507 if (inp_flags & INP_LOWPORT) {
2508 db_printf("%sINP_LOWPORT", comma ? ", " : "");
2509 comma = 1;
2510 }
2511 if (inp_flags & INP_ANONPORT) {
2512 db_printf("%sINP_ANONPORT", comma ? ", " : "");
2513 comma = 1;
2514 }
2515 if (inp_flags & INP_RECVIF) {
2516 db_printf("%sINP_RECVIF", comma ? ", " : "");
2517 comma = 1;
2518 }
2519 if (inp_flags & INP_MTUDISC) {
2520 db_printf("%sINP_MTUDISC", comma ? ", " : "");
2521 comma = 1;
2522 }
2523 if (inp_flags & INP_RECVTTL) {
2524 db_printf("%sINP_RECVTTL", comma ? ", " : "");
2525 comma = 1;
2526 }
2527 if (inp_flags & INP_DONTFRAG) {
2528 db_printf("%sINP_DONTFRAG", comma ? ", " : "");
2529 comma = 1;
2530 }
2531 if (inp_flags & INP_RECVTOS) {
2532 db_printf("%sINP_RECVTOS", comma ? ", " : "");
2533 comma = 1;
2534 }
2535 if (inp_flags & IN6P_IPV6_V6ONLY) {
2536 db_printf("%sIN6P_IPV6_V6ONLY", comma ? ", " : "");
2537 comma = 1;
2538 }
2539 if (inp_flags & IN6P_PKTINFO) {
2540 db_printf("%sIN6P_PKTINFO", comma ? ", " : "");
2541 comma = 1;
2542 }
2543 if (inp_flags & IN6P_HOPLIMIT) {
2544 db_printf("%sIN6P_HOPLIMIT", comma ? ", " : "");
2545 comma = 1;
2546 }
2547 if (inp_flags & IN6P_HOPOPTS) {
2548 db_printf("%sIN6P_HOPOPTS", comma ? ", " : "");
2549 comma = 1;
2550 }
2551 if (inp_flags & IN6P_DSTOPTS) {
2552 db_printf("%sIN6P_DSTOPTS", comma ? ", " : "");
2553 comma = 1;
2554 }
2555 if (inp_flags & IN6P_RTHDR) {
2556 db_printf("%sIN6P_RTHDR", comma ? ", " : "");
2557 comma = 1;
2558 }
2559 if (inp_flags & IN6P_RTHDRDSTOPTS) {
2560 db_printf("%sIN6P_RTHDRDSTOPTS", comma ? ", " : "");
2561 comma = 1;
2562 }
2563 if (inp_flags & IN6P_TCLASS) {
2564 db_printf("%sIN6P_TCLASS", comma ? ", " : "");
2565 comma = 1;
2566 }
2567 if (inp_flags & IN6P_AUTOFLOWLABEL) {
2568 db_printf("%sIN6P_AUTOFLOWLABEL", comma ? ", " : "");
2569 comma = 1;
2570 }
2571 if (inp_flags & INP_TIMEWAIT) {
2572 db_printf("%sINP_TIMEWAIT", comma ? ", " : "");
2573 comma = 1;
2574 }
2575 if (inp_flags & INP_ONESBCAST) {
2576 db_printf("%sINP_ONESBCAST", comma ? ", " : "");
2577 comma = 1;
2578 }
2579 if (inp_flags & INP_DROPPED) {
2580 db_printf("%sINP_DROPPED", comma ? ", " : "");
2581 comma = 1;
2582 }
2583 if (inp_flags & INP_SOCKREF) {
2584 db_printf("%sINP_SOCKREF", comma ? ", " : "");
2585 comma = 1;
2586 }
2587 if (inp_flags & IN6P_RFC2292) {
2588 db_printf("%sIN6P_RFC2292", comma ? ", " : "");
2589 comma = 1;
2590 }
2591 if (inp_flags & IN6P_MTU) {
2592 db_printf("IN6P_MTU%s", comma ? ", " : "");
2593 comma = 1;
2594 }
2595 }
2596
2597 static void
2598 db_print_inpvflag(u_char inp_vflag)
2599 {
2600 int comma;
2601
2602 comma = 0;
2603 if (inp_vflag & INP_IPV4) {
2604 db_printf("%sINP_IPV4", comma ? ", " : "");
2605 comma = 1;
2606 }
2607 if (inp_vflag & INP_IPV6) {
2608 db_printf("%sINP_IPV6", comma ? ", " : "");
2609 comma = 1;
2610 }
2611 if (inp_vflag & INP_IPV6PROTO) {
2612 db_printf("%sINP_IPV6PROTO", comma ? ", " : "");
2613 comma = 1;
2614 }
2615 }
2616
2617 static void
2618 db_print_inpcb(struct inpcb *inp, const char *name, int indent)
2619 {
2620
2621 db_print_indent(indent);
2622 db_printf("%s at %p\n", name, inp);
2623
2624 indent += 2;
2625
2626 db_print_indent(indent);
2627 db_printf("inp_flow: 0x%x\n", inp->inp_flow);
2628
2629 db_print_inconninfo(&inp->inp_inc, "inp_conninfo", indent);
2630
2631 db_print_indent(indent);
2632 db_printf("inp_ppcb: %p inp_pcbinfo: %p inp_socket: %p\n",
2633 inp->inp_ppcb, inp->inp_pcbinfo, inp->inp_socket);
2634
2635 db_print_indent(indent);
2636 db_printf("inp_label: %p inp_flags: 0x%x (",
2637 inp->inp_label, inp->inp_flags);
2638 db_print_inpflags(inp->inp_flags);
2639 db_printf(")\n");
2640
2641 db_print_indent(indent);
2642 db_printf("inp_sp: %p inp_vflag: 0x%x (", inp->inp_sp,
2643 inp->inp_vflag);
2644 db_print_inpvflag(inp->inp_vflag);
2645 db_printf(")\n");
2646
2647 db_print_indent(indent);
2648 db_printf("inp_ip_ttl: %d inp_ip_p: %d inp_ip_minttl: %d\n",
2649 inp->inp_ip_ttl, inp->inp_ip_p, inp->inp_ip_minttl);
2650
2651 db_print_indent(indent);
2652 #ifdef INET6
2653 if (inp->inp_vflag & INP_IPV6) {
2654 db_printf("in6p_options: %p in6p_outputopts: %p "
2655 "in6p_moptions: %p\n", inp->in6p_options,
2656 inp->in6p_outputopts, inp->in6p_moptions);
2657 db_printf("in6p_icmp6filt: %p in6p_cksum %d "
2658 "in6p_hops %u\n", inp->in6p_icmp6filt, inp->in6p_cksum,
2659 inp->in6p_hops);
2660 } else
2661 #endif
2662 {
2663 db_printf("inp_ip_tos: %d inp_ip_options: %p "
2664 "inp_ip_moptions: %p\n", inp->inp_ip_tos,
2665 inp->inp_options, inp->inp_moptions);
2666 }
2667
2668 db_print_indent(indent);
2669 db_printf("inp_phd: %p inp_gencnt: %ju\n", inp->inp_phd,
2670 (uintmax_t)inp->inp_gencnt);
2671 }
2672
2673 DB_SHOW_COMMAND(inpcb, db_show_inpcb)
2674 {
2675 struct inpcb *inp;
2676
2677 if (!have_addr) {
2678 db_printf("usage: show inpcb <addr>\n");
2679 return;
2680 }
2681 inp = (struct inpcb *)addr;
2682
2683 db_print_inpcb(inp, "inpcb", 0);
2684 }
2685 #endif /* DDB */
Cache object: 60eb7c75af0c4262bea9e9944ba3e6c0
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