1/*
2 * Copyright (c) 1982, 1986, 1991, 1993, 1995
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 * @(#)in_pcb.c 8.4 (Berkeley) 5/24/95
| 1/*
2 * Copyright (c) 1982, 1986, 1991, 1993, 1995
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 * @(#)in_pcb.c 8.4 (Berkeley) 5/24/95
|
34 * $FreeBSD: head/sys/netinet/in_pcb.c 86764 2001-11-22 04:50:44Z jlemon $
| 34 * $FreeBSD: head/sys/netinet/in_pcb.c 87275 2001-12-03 16:12:27Z rwatson $
|
35 */
36
37#include "opt_ipsec.h"
38#include "opt_inet6.h"
39
40#include <sys/param.h>
41#include <sys/systm.h>
42#include <sys/malloc.h>
43#include <sys/mbuf.h>
44#include <sys/domain.h>
45#include <sys/protosw.h>
46#include <sys/socket.h>
47#include <sys/socketvar.h>
48#include <sys/proc.h>
49#include <sys/jail.h>
50#include <sys/kernel.h>
51#include <sys/sysctl.h>
52
53#include <machine/limits.h>
54
55#include <vm/vm_zone.h>
56
57#include <net/if.h>
58#include <net/if_types.h>
59#include <net/route.h>
60
61#include <netinet/in.h>
62#include <netinet/in_pcb.h>
63#include <netinet/in_var.h>
64#include <netinet/ip_var.h>
65#ifdef INET6
66#include <netinet/ip6.h>
67#include <netinet6/ip6_var.h>
68#endif /* INET6 */
69
70#ifdef IPSEC
71#include <netinet6/ipsec.h>
72#include <netkey/key.h>
73#endif /* IPSEC */
74
75struct in_addr zeroin_addr;
76
77/*
78 * These configure the range of local port addresses assigned to
79 * "unspecified" outgoing connections/packets/whatever.
80 */
81int ipport_lowfirstauto = IPPORT_RESERVED - 1; /* 1023 */
82int ipport_lowlastauto = IPPORT_RESERVEDSTART; /* 600 */
83int ipport_firstauto = IPPORT_RESERVED; /* 1024 */
84int ipport_lastauto = IPPORT_USERRESERVED; /* 5000 */
85int ipport_hifirstauto = IPPORT_HIFIRSTAUTO; /* 49152 */
86int ipport_hilastauto = IPPORT_HILASTAUTO; /* 65535 */
87
88#define RANGECHK(var, min, max) \
89 if ((var) < (min)) { (var) = (min); } \
90 else if ((var) > (max)) { (var) = (max); }
91
92static int
93sysctl_net_ipport_check(SYSCTL_HANDLER_ARGS)
94{
95 int error = sysctl_handle_int(oidp,
96 oidp->oid_arg1, oidp->oid_arg2, req);
97 if (!error) {
98 RANGECHK(ipport_lowfirstauto, 1, IPPORT_RESERVED - 1);
99 RANGECHK(ipport_lowlastauto, 1, IPPORT_RESERVED - 1);
100 RANGECHK(ipport_firstauto, IPPORT_RESERVED, USHRT_MAX);
101 RANGECHK(ipport_lastauto, IPPORT_RESERVED, USHRT_MAX);
102 RANGECHK(ipport_hifirstauto, IPPORT_RESERVED, USHRT_MAX);
103 RANGECHK(ipport_hilastauto, IPPORT_RESERVED, USHRT_MAX);
104 }
105 return error;
106}
107
108#undef RANGECHK
109
110SYSCTL_NODE(_net_inet_ip, IPPROTO_IP, portrange, CTLFLAG_RW, 0, "IP Ports");
111
112SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, lowfirst, CTLTYPE_INT|CTLFLAG_RW,
113 &ipport_lowfirstauto, 0, &sysctl_net_ipport_check, "I", "");
114SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, lowlast, CTLTYPE_INT|CTLFLAG_RW,
115 &ipport_lowlastauto, 0, &sysctl_net_ipport_check, "I", "");
116SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, first, CTLTYPE_INT|CTLFLAG_RW,
117 &ipport_firstauto, 0, &sysctl_net_ipport_check, "I", "");
118SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, last, CTLTYPE_INT|CTLFLAG_RW,
119 &ipport_lastauto, 0, &sysctl_net_ipport_check, "I", "");
120SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, hifirst, CTLTYPE_INT|CTLFLAG_RW,
121 &ipport_hifirstauto, 0, &sysctl_net_ipport_check, "I", "");
122SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, hilast, CTLTYPE_INT|CTLFLAG_RW,
123 &ipport_hilastauto, 0, &sysctl_net_ipport_check, "I", "");
124
125/*
126 * in_pcb.c: manage the Protocol Control Blocks.
127 *
128 * NOTE: It is assumed that most of these functions will be called at
129 * splnet(). XXX - There are, unfortunately, a few exceptions to this
130 * rule that should be fixed.
131 */
132
133/*
134 * Allocate a PCB and associate it with the socket.
135 */
136int
137in_pcballoc(so, pcbinfo, td)
138 struct socket *so;
139 struct inpcbinfo *pcbinfo;
140 struct thread *td;
141{
142 register struct inpcb *inp;
143#ifdef IPSEC
144 int error;
145#endif
146
147 inp = zalloc(pcbinfo->ipi_zone);
148 if (inp == NULL)
149 return (ENOBUFS);
150 bzero((caddr_t)inp, sizeof(*inp));
151 inp->inp_gencnt = ++pcbinfo->ipi_gencnt;
152 inp->inp_pcbinfo = pcbinfo;
153 inp->inp_socket = so;
154#ifdef IPSEC
155 error = ipsec_init_policy(so, &inp->inp_sp);
156 if (error != 0) {
157 zfree(pcbinfo->ipi_zone, inp);
158 return error;
159 }
160#endif /*IPSEC*/
161#if defined(INET6)
162 if (INP_SOCKAF(so) == AF_INET6 && !ip6_mapped_addr_on)
163 inp->inp_flags |= IN6P_IPV6_V6ONLY;
164#endif
165 LIST_INSERT_HEAD(pcbinfo->listhead, inp, inp_list);
166 pcbinfo->ipi_count++;
167 so->so_pcb = (caddr_t)inp;
168#ifdef INET6
169 if (ip6_auto_flowlabel)
170 inp->inp_flags |= IN6P_AUTOFLOWLABEL;
171#endif
172 return (0);
173}
174
175int
176in_pcbbind(inp, nam, td)
177 register struct inpcb *inp;
178 struct sockaddr *nam;
179 struct thread *td;
180{
181 struct proc *p = td->td_proc;
182 register struct socket *so = inp->inp_socket;
183 unsigned short *lastport;
184 struct sockaddr_in *sin;
185 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
186 u_short lport = 0;
187 int wild = 0, reuseport = (so->so_options & SO_REUSEPORT);
188 int error, prison = 0;
189
190 if (TAILQ_EMPTY(&in_ifaddrhead)) /* XXX broken! */
191 return (EADDRNOTAVAIL);
192 if (inp->inp_lport || inp->inp_laddr.s_addr != INADDR_ANY)
193 return (EINVAL);
194 if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) == 0)
195 wild = 1;
196 if (nam) {
197 sin = (struct sockaddr_in *)nam;
198 if (nam->sa_len != sizeof (*sin))
199 return (EINVAL);
200#ifdef notdef
201 /*
202 * We should check the family, but old programs
203 * incorrectly fail to initialize it.
204 */
205 if (sin->sin_family != AF_INET)
206 return (EAFNOSUPPORT);
207#endif
208 if (sin->sin_addr.s_addr != INADDR_ANY)
209 if (prison_ip(p->p_ucred, 0, &sin->sin_addr.s_addr))
210 return(EINVAL);
211 lport = sin->sin_port;
212 if (IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
213 /*
214 * Treat SO_REUSEADDR as SO_REUSEPORT for multicast;
215 * allow complete duplication of binding if
216 * SO_REUSEPORT is set, or if SO_REUSEADDR is set
217 * and a multicast address is bound on both
218 * new and duplicated sockets.
219 */
220 if (so->so_options & SO_REUSEADDR)
221 reuseport = SO_REUSEADDR|SO_REUSEPORT;
222 } else if (sin->sin_addr.s_addr != INADDR_ANY) {
223 sin->sin_port = 0; /* yech... */
224 bzero(&sin->sin_zero, sizeof(sin->sin_zero));
225 if (ifa_ifwithaddr((struct sockaddr *)sin) == 0)
226 return (EADDRNOTAVAIL);
227 }
228 if (lport) {
229 struct inpcb *t;
230 /* GROSS */
231 if (ntohs(lport) < IPPORT_RESERVED && p &&
232 suser_xxx(0, p, PRISON_ROOT))
233 return (EACCES);
234 if (p && jailed(p->p_ucred))
235 prison = 1;
236 if (so->so_cred->cr_uid != 0 &&
237 !IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
238 t = in_pcblookup_local(inp->inp_pcbinfo,
239 sin->sin_addr, lport,
240 prison ? 0 : INPLOOKUP_WILDCARD);
241 if (t &&
242 (ntohl(sin->sin_addr.s_addr) != INADDR_ANY ||
243 ntohl(t->inp_laddr.s_addr) != INADDR_ANY ||
244 (t->inp_socket->so_options &
245 SO_REUSEPORT) == 0) &&
246 (so->so_cred->cr_uid !=
247 t->inp_socket->so_cred->cr_uid)) {
248#if defined(INET6)
249 if (ntohl(sin->sin_addr.s_addr) !=
250 INADDR_ANY ||
251 ntohl(t->inp_laddr.s_addr) !=
252 INADDR_ANY ||
253 INP_SOCKAF(so) ==
254 INP_SOCKAF(t->inp_socket))
255#endif /* defined(INET6) */
256 return (EADDRINUSE);
257 }
258 }
259 if (prison &&
260 prison_ip(p->p_ucred, 0, &sin->sin_addr.s_addr))
261 return (EADDRNOTAVAIL);
262 t = in_pcblookup_local(pcbinfo, sin->sin_addr,
263 lport, prison ? 0 : wild);
264 if (t &&
265 (reuseport & t->inp_socket->so_options) == 0) {
266#if defined(INET6)
267 if (ntohl(sin->sin_addr.s_addr) !=
268 INADDR_ANY ||
269 ntohl(t->inp_laddr.s_addr) !=
270 INADDR_ANY ||
271 INP_SOCKAF(so) ==
272 INP_SOCKAF(t->inp_socket))
273#endif /* defined(INET6) */
274 return (EADDRINUSE);
275 }
276 }
277 inp->inp_laddr = sin->sin_addr;
278 }
279 if (lport == 0) {
280 ushort first, last;
281 int count;
282
283 if (inp->inp_laddr.s_addr != INADDR_ANY)
284 if (prison_ip(p->p_ucred, 0, &inp->inp_laddr.s_addr )) {
285 inp->inp_laddr.s_addr = INADDR_ANY;
286 return (EINVAL);
287 }
288 inp->inp_flags |= INP_ANONPORT;
289
290 if (inp->inp_flags & INP_HIGHPORT) {
291 first = ipport_hifirstauto; /* sysctl */
292 last = ipport_hilastauto;
293 lastport = &pcbinfo->lasthi;
294 } else if (inp->inp_flags & INP_LOWPORT) {
295 if (p && (error = suser_xxx(0, p, PRISON_ROOT))) {
296 inp->inp_laddr.s_addr = INADDR_ANY;
297 return error;
298 }
299 first = ipport_lowfirstauto; /* 1023 */
300 last = ipport_lowlastauto; /* 600 */
301 lastport = &pcbinfo->lastlow;
302 } else {
303 first = ipport_firstauto; /* sysctl */
304 last = ipport_lastauto;
305 lastport = &pcbinfo->lastport;
306 }
307 /*
308 * Simple check to ensure all ports are not used up causing
309 * a deadlock here.
310 *
311 * We split the two cases (up and down) so that the direction
312 * is not being tested on each round of the loop.
313 */
314 if (first > last) {
315 /*
316 * counting down
317 */
318 count = first - last;
319
320 do {
321 if (count-- < 0) { /* completely used? */
322 inp->inp_laddr.s_addr = INADDR_ANY;
323 return (EADDRNOTAVAIL);
324 }
325 --*lastport;
326 if (*lastport > first || *lastport < last)
327 *lastport = first;
328 lport = htons(*lastport);
329 } while (in_pcblookup_local(pcbinfo,
330 inp->inp_laddr, lport, wild));
331 } else {
332 /*
333 * counting up
334 */
335 count = last - first;
336
337 do {
338 if (count-- < 0) { /* completely used? */
339 /*
340 * Undo any address bind that may have
341 * occurred above.
342 */
343 inp->inp_laddr.s_addr = INADDR_ANY;
344 return (EADDRNOTAVAIL);
345 }
346 ++*lastport;
347 if (*lastport < first || *lastport > last)
348 *lastport = first;
349 lport = htons(*lastport);
350 } while (in_pcblookup_local(pcbinfo,
351 inp->inp_laddr, lport, wild));
352 }
353 }
354 inp->inp_lport = lport;
355 if (prison_ip(p->p_ucred, 0, &inp->inp_laddr.s_addr)) {
356 inp->inp_laddr.s_addr = INADDR_ANY;
357 inp->inp_lport = 0;
358 return(EINVAL);
359 }
360 if (in_pcbinshash(inp) != 0) {
361 inp->inp_laddr.s_addr = INADDR_ANY;
362 inp->inp_lport = 0;
363 return (EAGAIN);
364 }
365 return (0);
366}
367
368/*
369 * Transform old in_pcbconnect() into an inner subroutine for new
370 * in_pcbconnect(): Do some validity-checking on the remote
371 * address (in mbuf 'nam') and then determine local host address
372 * (i.e., which interface) to use to access that remote host.
373 *
374 * This preserves definition of in_pcbconnect(), while supporting a
375 * slightly different version for T/TCP. (This is more than
376 * a bit of a kludge, but cleaning up the internal interfaces would
377 * have forced minor changes in every protocol).
378 */
379
380int
381in_pcbladdr(inp, nam, plocal_sin)
382 register struct inpcb *inp;
383 struct sockaddr *nam;
384 struct sockaddr_in **plocal_sin;
385{
386 struct in_ifaddr *ia;
387 register struct sockaddr_in *sin = (struct sockaddr_in *)nam;
388
389 if (nam->sa_len != sizeof (*sin))
390 return (EINVAL);
391 if (sin->sin_family != AF_INET)
392 return (EAFNOSUPPORT);
393 if (sin->sin_port == 0)
394 return (EADDRNOTAVAIL);
395 if (!TAILQ_EMPTY(&in_ifaddrhead)) {
396 /*
397 * If the destination address is INADDR_ANY,
398 * use the primary local address.
399 * If the supplied address is INADDR_BROADCAST,
400 * and the primary interface supports broadcast,
401 * choose the broadcast address for that interface.
402 */
403 if (sin->sin_addr.s_addr == INADDR_ANY)
404 sin->sin_addr = IA_SIN(TAILQ_FIRST(&in_ifaddrhead))->sin_addr;
405 else if (sin->sin_addr.s_addr == (u_long)INADDR_BROADCAST &&
406 (TAILQ_FIRST(&in_ifaddrhead)->ia_ifp->if_flags & IFF_BROADCAST))
407 sin->sin_addr = satosin(&TAILQ_FIRST(&in_ifaddrhead)->ia_broadaddr)->sin_addr;
408 }
409 if (inp->inp_laddr.s_addr == INADDR_ANY) {
410 register struct route *ro;
411
412 ia = (struct in_ifaddr *)0;
413 /*
414 * If route is known or can be allocated now,
415 * our src addr is taken from the i/f, else punt.
416 */
417 ro = &inp->inp_route;
418 if (ro->ro_rt &&
419 (satosin(&ro->ro_dst)->sin_addr.s_addr !=
420 sin->sin_addr.s_addr ||
421 inp->inp_socket->so_options & SO_DONTROUTE)) {
422 RTFREE(ro->ro_rt);
423 ro->ro_rt = (struct rtentry *)0;
424 }
425 if ((inp->inp_socket->so_options & SO_DONTROUTE) == 0 && /*XXX*/
426 (ro->ro_rt == (struct rtentry *)0 ||
427 ro->ro_rt->rt_ifp == (struct ifnet *)0)) {
428 /* No route yet, so try to acquire one */
429 ro->ro_dst.sa_family = AF_INET;
430 ro->ro_dst.sa_len = sizeof(struct sockaddr_in);
431 ((struct sockaddr_in *) &ro->ro_dst)->sin_addr =
432 sin->sin_addr;
433 rtalloc(ro);
434 }
435 /*
436 * If we found a route, use the address
437 * corresponding to the outgoing interface
438 * unless it is the loopback (in case a route
439 * to our address on another net goes to loopback).
440 */
441 if (ro->ro_rt && !(ro->ro_rt->rt_ifp->if_flags & IFF_LOOPBACK))
442 ia = ifatoia(ro->ro_rt->rt_ifa);
443 if (ia == 0) {
444 u_short fport = sin->sin_port;
445
446 sin->sin_port = 0;
447 ia = ifatoia(ifa_ifwithdstaddr(sintosa(sin)));
448 if (ia == 0)
449 ia = ifatoia(ifa_ifwithnet(sintosa(sin)));
450 sin->sin_port = fport;
451 if (ia == 0)
452 ia = TAILQ_FIRST(&in_ifaddrhead);
453 if (ia == 0)
454 return (EADDRNOTAVAIL);
455 }
456 /*
457 * If the destination address is multicast and an outgoing
458 * interface has been set as a multicast option, use the
459 * address of that interface as our source address.
460 */
461 if (IN_MULTICAST(ntohl(sin->sin_addr.s_addr)) &&
462 inp->inp_moptions != NULL) {
463 struct ip_moptions *imo;
464 struct ifnet *ifp;
465
466 imo = inp->inp_moptions;
467 if (imo->imo_multicast_ifp != NULL) {
468 ifp = imo->imo_multicast_ifp;
469 TAILQ_FOREACH(ia, &in_ifaddrhead, ia_link)
470 if (ia->ia_ifp == ifp)
471 break;
472 if (ia == 0)
473 return (EADDRNOTAVAIL);
474 }
475 }
476 /*
477 * Don't do pcblookup call here; return interface in plocal_sin
478 * and exit to caller, that will do the lookup.
479 */
480 *plocal_sin = &ia->ia_addr;
481
482 }
483 return(0);
484}
485
486/*
487 * Outer subroutine:
488 * Connect from a socket to a specified address.
489 * Both address and port must be specified in argument sin.
490 * If don't have a local address for this socket yet,
491 * then pick one.
492 */
493int
494in_pcbconnect(inp, nam, td)
495 register struct inpcb *inp;
496 struct sockaddr *nam;
497 struct thread *td;
498{
499 struct sockaddr_in *ifaddr;
500 struct sockaddr_in *sin = (struct sockaddr_in *)nam;
501 struct sockaddr_in sa;
502 struct ucred *cred;
503 int error;
504
505 cred = inp->inp_socket->so_cred;
506 if (inp->inp_laddr.s_addr == INADDR_ANY && jailed(cred)) {
507 bzero(&sa, sizeof (sa));
| 35 */
36
37#include "opt_ipsec.h"
38#include "opt_inet6.h"
39
40#include <sys/param.h>
41#include <sys/systm.h>
42#include <sys/malloc.h>
43#include <sys/mbuf.h>
44#include <sys/domain.h>
45#include <sys/protosw.h>
46#include <sys/socket.h>
47#include <sys/socketvar.h>
48#include <sys/proc.h>
49#include <sys/jail.h>
50#include <sys/kernel.h>
51#include <sys/sysctl.h>
52
53#include <machine/limits.h>
54
55#include <vm/vm_zone.h>
56
57#include <net/if.h>
58#include <net/if_types.h>
59#include <net/route.h>
60
61#include <netinet/in.h>
62#include <netinet/in_pcb.h>
63#include <netinet/in_var.h>
64#include <netinet/ip_var.h>
65#ifdef INET6
66#include <netinet/ip6.h>
67#include <netinet6/ip6_var.h>
68#endif /* INET6 */
69
70#ifdef IPSEC
71#include <netinet6/ipsec.h>
72#include <netkey/key.h>
73#endif /* IPSEC */
74
75struct in_addr zeroin_addr;
76
77/*
78 * These configure the range of local port addresses assigned to
79 * "unspecified" outgoing connections/packets/whatever.
80 */
81int ipport_lowfirstauto = IPPORT_RESERVED - 1; /* 1023 */
82int ipport_lowlastauto = IPPORT_RESERVEDSTART; /* 600 */
83int ipport_firstauto = IPPORT_RESERVED; /* 1024 */
84int ipport_lastauto = IPPORT_USERRESERVED; /* 5000 */
85int ipport_hifirstauto = IPPORT_HIFIRSTAUTO; /* 49152 */
86int ipport_hilastauto = IPPORT_HILASTAUTO; /* 65535 */
87
88#define RANGECHK(var, min, max) \
89 if ((var) < (min)) { (var) = (min); } \
90 else if ((var) > (max)) { (var) = (max); }
91
92static int
93sysctl_net_ipport_check(SYSCTL_HANDLER_ARGS)
94{
95 int error = sysctl_handle_int(oidp,
96 oidp->oid_arg1, oidp->oid_arg2, req);
97 if (!error) {
98 RANGECHK(ipport_lowfirstauto, 1, IPPORT_RESERVED - 1);
99 RANGECHK(ipport_lowlastauto, 1, IPPORT_RESERVED - 1);
100 RANGECHK(ipport_firstauto, IPPORT_RESERVED, USHRT_MAX);
101 RANGECHK(ipport_lastauto, IPPORT_RESERVED, USHRT_MAX);
102 RANGECHK(ipport_hifirstauto, IPPORT_RESERVED, USHRT_MAX);
103 RANGECHK(ipport_hilastauto, IPPORT_RESERVED, USHRT_MAX);
104 }
105 return error;
106}
107
108#undef RANGECHK
109
110SYSCTL_NODE(_net_inet_ip, IPPROTO_IP, portrange, CTLFLAG_RW, 0, "IP Ports");
111
112SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, lowfirst, CTLTYPE_INT|CTLFLAG_RW,
113 &ipport_lowfirstauto, 0, &sysctl_net_ipport_check, "I", "");
114SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, lowlast, CTLTYPE_INT|CTLFLAG_RW,
115 &ipport_lowlastauto, 0, &sysctl_net_ipport_check, "I", "");
116SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, first, CTLTYPE_INT|CTLFLAG_RW,
117 &ipport_firstauto, 0, &sysctl_net_ipport_check, "I", "");
118SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, last, CTLTYPE_INT|CTLFLAG_RW,
119 &ipport_lastauto, 0, &sysctl_net_ipport_check, "I", "");
120SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, hifirst, CTLTYPE_INT|CTLFLAG_RW,
121 &ipport_hifirstauto, 0, &sysctl_net_ipport_check, "I", "");
122SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, hilast, CTLTYPE_INT|CTLFLAG_RW,
123 &ipport_hilastauto, 0, &sysctl_net_ipport_check, "I", "");
124
125/*
126 * in_pcb.c: manage the Protocol Control Blocks.
127 *
128 * NOTE: It is assumed that most of these functions will be called at
129 * splnet(). XXX - There are, unfortunately, a few exceptions to this
130 * rule that should be fixed.
131 */
132
133/*
134 * Allocate a PCB and associate it with the socket.
135 */
136int
137in_pcballoc(so, pcbinfo, td)
138 struct socket *so;
139 struct inpcbinfo *pcbinfo;
140 struct thread *td;
141{
142 register struct inpcb *inp;
143#ifdef IPSEC
144 int error;
145#endif
146
147 inp = zalloc(pcbinfo->ipi_zone);
148 if (inp == NULL)
149 return (ENOBUFS);
150 bzero((caddr_t)inp, sizeof(*inp));
151 inp->inp_gencnt = ++pcbinfo->ipi_gencnt;
152 inp->inp_pcbinfo = pcbinfo;
153 inp->inp_socket = so;
154#ifdef IPSEC
155 error = ipsec_init_policy(so, &inp->inp_sp);
156 if (error != 0) {
157 zfree(pcbinfo->ipi_zone, inp);
158 return error;
159 }
160#endif /*IPSEC*/
161#if defined(INET6)
162 if (INP_SOCKAF(so) == AF_INET6 && !ip6_mapped_addr_on)
163 inp->inp_flags |= IN6P_IPV6_V6ONLY;
164#endif
165 LIST_INSERT_HEAD(pcbinfo->listhead, inp, inp_list);
166 pcbinfo->ipi_count++;
167 so->so_pcb = (caddr_t)inp;
168#ifdef INET6
169 if (ip6_auto_flowlabel)
170 inp->inp_flags |= IN6P_AUTOFLOWLABEL;
171#endif
172 return (0);
173}
174
175int
176in_pcbbind(inp, nam, td)
177 register struct inpcb *inp;
178 struct sockaddr *nam;
179 struct thread *td;
180{
181 struct proc *p = td->td_proc;
182 register struct socket *so = inp->inp_socket;
183 unsigned short *lastport;
184 struct sockaddr_in *sin;
185 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
186 u_short lport = 0;
187 int wild = 0, reuseport = (so->so_options & SO_REUSEPORT);
188 int error, prison = 0;
189
190 if (TAILQ_EMPTY(&in_ifaddrhead)) /* XXX broken! */
191 return (EADDRNOTAVAIL);
192 if (inp->inp_lport || inp->inp_laddr.s_addr != INADDR_ANY)
193 return (EINVAL);
194 if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) == 0)
195 wild = 1;
196 if (nam) {
197 sin = (struct sockaddr_in *)nam;
198 if (nam->sa_len != sizeof (*sin))
199 return (EINVAL);
200#ifdef notdef
201 /*
202 * We should check the family, but old programs
203 * incorrectly fail to initialize it.
204 */
205 if (sin->sin_family != AF_INET)
206 return (EAFNOSUPPORT);
207#endif
208 if (sin->sin_addr.s_addr != INADDR_ANY)
209 if (prison_ip(p->p_ucred, 0, &sin->sin_addr.s_addr))
210 return(EINVAL);
211 lport = sin->sin_port;
212 if (IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
213 /*
214 * Treat SO_REUSEADDR as SO_REUSEPORT for multicast;
215 * allow complete duplication of binding if
216 * SO_REUSEPORT is set, or if SO_REUSEADDR is set
217 * and a multicast address is bound on both
218 * new and duplicated sockets.
219 */
220 if (so->so_options & SO_REUSEADDR)
221 reuseport = SO_REUSEADDR|SO_REUSEPORT;
222 } else if (sin->sin_addr.s_addr != INADDR_ANY) {
223 sin->sin_port = 0; /* yech... */
224 bzero(&sin->sin_zero, sizeof(sin->sin_zero));
225 if (ifa_ifwithaddr((struct sockaddr *)sin) == 0)
226 return (EADDRNOTAVAIL);
227 }
228 if (lport) {
229 struct inpcb *t;
230 /* GROSS */
231 if (ntohs(lport) < IPPORT_RESERVED && p &&
232 suser_xxx(0, p, PRISON_ROOT))
233 return (EACCES);
234 if (p && jailed(p->p_ucred))
235 prison = 1;
236 if (so->so_cred->cr_uid != 0 &&
237 !IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
238 t = in_pcblookup_local(inp->inp_pcbinfo,
239 sin->sin_addr, lport,
240 prison ? 0 : INPLOOKUP_WILDCARD);
241 if (t &&
242 (ntohl(sin->sin_addr.s_addr) != INADDR_ANY ||
243 ntohl(t->inp_laddr.s_addr) != INADDR_ANY ||
244 (t->inp_socket->so_options &
245 SO_REUSEPORT) == 0) &&
246 (so->so_cred->cr_uid !=
247 t->inp_socket->so_cred->cr_uid)) {
248#if defined(INET6)
249 if (ntohl(sin->sin_addr.s_addr) !=
250 INADDR_ANY ||
251 ntohl(t->inp_laddr.s_addr) !=
252 INADDR_ANY ||
253 INP_SOCKAF(so) ==
254 INP_SOCKAF(t->inp_socket))
255#endif /* defined(INET6) */
256 return (EADDRINUSE);
257 }
258 }
259 if (prison &&
260 prison_ip(p->p_ucred, 0, &sin->sin_addr.s_addr))
261 return (EADDRNOTAVAIL);
262 t = in_pcblookup_local(pcbinfo, sin->sin_addr,
263 lport, prison ? 0 : wild);
264 if (t &&
265 (reuseport & t->inp_socket->so_options) == 0) {
266#if defined(INET6)
267 if (ntohl(sin->sin_addr.s_addr) !=
268 INADDR_ANY ||
269 ntohl(t->inp_laddr.s_addr) !=
270 INADDR_ANY ||
271 INP_SOCKAF(so) ==
272 INP_SOCKAF(t->inp_socket))
273#endif /* defined(INET6) */
274 return (EADDRINUSE);
275 }
276 }
277 inp->inp_laddr = sin->sin_addr;
278 }
279 if (lport == 0) {
280 ushort first, last;
281 int count;
282
283 if (inp->inp_laddr.s_addr != INADDR_ANY)
284 if (prison_ip(p->p_ucred, 0, &inp->inp_laddr.s_addr )) {
285 inp->inp_laddr.s_addr = INADDR_ANY;
286 return (EINVAL);
287 }
288 inp->inp_flags |= INP_ANONPORT;
289
290 if (inp->inp_flags & INP_HIGHPORT) {
291 first = ipport_hifirstauto; /* sysctl */
292 last = ipport_hilastauto;
293 lastport = &pcbinfo->lasthi;
294 } else if (inp->inp_flags & INP_LOWPORT) {
295 if (p && (error = suser_xxx(0, p, PRISON_ROOT))) {
296 inp->inp_laddr.s_addr = INADDR_ANY;
297 return error;
298 }
299 first = ipport_lowfirstauto; /* 1023 */
300 last = ipport_lowlastauto; /* 600 */
301 lastport = &pcbinfo->lastlow;
302 } else {
303 first = ipport_firstauto; /* sysctl */
304 last = ipport_lastauto;
305 lastport = &pcbinfo->lastport;
306 }
307 /*
308 * Simple check to ensure all ports are not used up causing
309 * a deadlock here.
310 *
311 * We split the two cases (up and down) so that the direction
312 * is not being tested on each round of the loop.
313 */
314 if (first > last) {
315 /*
316 * counting down
317 */
318 count = first - last;
319
320 do {
321 if (count-- < 0) { /* completely used? */
322 inp->inp_laddr.s_addr = INADDR_ANY;
323 return (EADDRNOTAVAIL);
324 }
325 --*lastport;
326 if (*lastport > first || *lastport < last)
327 *lastport = first;
328 lport = htons(*lastport);
329 } while (in_pcblookup_local(pcbinfo,
330 inp->inp_laddr, lport, wild));
331 } else {
332 /*
333 * counting up
334 */
335 count = last - first;
336
337 do {
338 if (count-- < 0) { /* completely used? */
339 /*
340 * Undo any address bind that may have
341 * occurred above.
342 */
343 inp->inp_laddr.s_addr = INADDR_ANY;
344 return (EADDRNOTAVAIL);
345 }
346 ++*lastport;
347 if (*lastport < first || *lastport > last)
348 *lastport = first;
349 lport = htons(*lastport);
350 } while (in_pcblookup_local(pcbinfo,
351 inp->inp_laddr, lport, wild));
352 }
353 }
354 inp->inp_lport = lport;
355 if (prison_ip(p->p_ucred, 0, &inp->inp_laddr.s_addr)) {
356 inp->inp_laddr.s_addr = INADDR_ANY;
357 inp->inp_lport = 0;
358 return(EINVAL);
359 }
360 if (in_pcbinshash(inp) != 0) {
361 inp->inp_laddr.s_addr = INADDR_ANY;
362 inp->inp_lport = 0;
363 return (EAGAIN);
364 }
365 return (0);
366}
367
368/*
369 * Transform old in_pcbconnect() into an inner subroutine for new
370 * in_pcbconnect(): Do some validity-checking on the remote
371 * address (in mbuf 'nam') and then determine local host address
372 * (i.e., which interface) to use to access that remote host.
373 *
374 * This preserves definition of in_pcbconnect(), while supporting a
375 * slightly different version for T/TCP. (This is more than
376 * a bit of a kludge, but cleaning up the internal interfaces would
377 * have forced minor changes in every protocol).
378 */
379
380int
381in_pcbladdr(inp, nam, plocal_sin)
382 register struct inpcb *inp;
383 struct sockaddr *nam;
384 struct sockaddr_in **plocal_sin;
385{
386 struct in_ifaddr *ia;
387 register struct sockaddr_in *sin = (struct sockaddr_in *)nam;
388
389 if (nam->sa_len != sizeof (*sin))
390 return (EINVAL);
391 if (sin->sin_family != AF_INET)
392 return (EAFNOSUPPORT);
393 if (sin->sin_port == 0)
394 return (EADDRNOTAVAIL);
395 if (!TAILQ_EMPTY(&in_ifaddrhead)) {
396 /*
397 * If the destination address is INADDR_ANY,
398 * use the primary local address.
399 * If the supplied address is INADDR_BROADCAST,
400 * and the primary interface supports broadcast,
401 * choose the broadcast address for that interface.
402 */
403 if (sin->sin_addr.s_addr == INADDR_ANY)
404 sin->sin_addr = IA_SIN(TAILQ_FIRST(&in_ifaddrhead))->sin_addr;
405 else if (sin->sin_addr.s_addr == (u_long)INADDR_BROADCAST &&
406 (TAILQ_FIRST(&in_ifaddrhead)->ia_ifp->if_flags & IFF_BROADCAST))
407 sin->sin_addr = satosin(&TAILQ_FIRST(&in_ifaddrhead)->ia_broadaddr)->sin_addr;
408 }
409 if (inp->inp_laddr.s_addr == INADDR_ANY) {
410 register struct route *ro;
411
412 ia = (struct in_ifaddr *)0;
413 /*
414 * If route is known or can be allocated now,
415 * our src addr is taken from the i/f, else punt.
416 */
417 ro = &inp->inp_route;
418 if (ro->ro_rt &&
419 (satosin(&ro->ro_dst)->sin_addr.s_addr !=
420 sin->sin_addr.s_addr ||
421 inp->inp_socket->so_options & SO_DONTROUTE)) {
422 RTFREE(ro->ro_rt);
423 ro->ro_rt = (struct rtentry *)0;
424 }
425 if ((inp->inp_socket->so_options & SO_DONTROUTE) == 0 && /*XXX*/
426 (ro->ro_rt == (struct rtentry *)0 ||
427 ro->ro_rt->rt_ifp == (struct ifnet *)0)) {
428 /* No route yet, so try to acquire one */
429 ro->ro_dst.sa_family = AF_INET;
430 ro->ro_dst.sa_len = sizeof(struct sockaddr_in);
431 ((struct sockaddr_in *) &ro->ro_dst)->sin_addr =
432 sin->sin_addr;
433 rtalloc(ro);
434 }
435 /*
436 * If we found a route, use the address
437 * corresponding to the outgoing interface
438 * unless it is the loopback (in case a route
439 * to our address on another net goes to loopback).
440 */
441 if (ro->ro_rt && !(ro->ro_rt->rt_ifp->if_flags & IFF_LOOPBACK))
442 ia = ifatoia(ro->ro_rt->rt_ifa);
443 if (ia == 0) {
444 u_short fport = sin->sin_port;
445
446 sin->sin_port = 0;
447 ia = ifatoia(ifa_ifwithdstaddr(sintosa(sin)));
448 if (ia == 0)
449 ia = ifatoia(ifa_ifwithnet(sintosa(sin)));
450 sin->sin_port = fport;
451 if (ia == 0)
452 ia = TAILQ_FIRST(&in_ifaddrhead);
453 if (ia == 0)
454 return (EADDRNOTAVAIL);
455 }
456 /*
457 * If the destination address is multicast and an outgoing
458 * interface has been set as a multicast option, use the
459 * address of that interface as our source address.
460 */
461 if (IN_MULTICAST(ntohl(sin->sin_addr.s_addr)) &&
462 inp->inp_moptions != NULL) {
463 struct ip_moptions *imo;
464 struct ifnet *ifp;
465
466 imo = inp->inp_moptions;
467 if (imo->imo_multicast_ifp != NULL) {
468 ifp = imo->imo_multicast_ifp;
469 TAILQ_FOREACH(ia, &in_ifaddrhead, ia_link)
470 if (ia->ia_ifp == ifp)
471 break;
472 if (ia == 0)
473 return (EADDRNOTAVAIL);
474 }
475 }
476 /*
477 * Don't do pcblookup call here; return interface in plocal_sin
478 * and exit to caller, that will do the lookup.
479 */
480 *plocal_sin = &ia->ia_addr;
481
482 }
483 return(0);
484}
485
486/*
487 * Outer subroutine:
488 * Connect from a socket to a specified address.
489 * Both address and port must be specified in argument sin.
490 * If don't have a local address for this socket yet,
491 * then pick one.
492 */
493int
494in_pcbconnect(inp, nam, td)
495 register struct inpcb *inp;
496 struct sockaddr *nam;
497 struct thread *td;
498{
499 struct sockaddr_in *ifaddr;
500 struct sockaddr_in *sin = (struct sockaddr_in *)nam;
501 struct sockaddr_in sa;
502 struct ucred *cred;
503 int error;
504
505 cred = inp->inp_socket->so_cred;
506 if (inp->inp_laddr.s_addr == INADDR_ANY && jailed(cred)) {
507 bzero(&sa, sizeof (sa));
|
508 sa.sin_addr.s_addr = htonl(cred->cr_prison->pr_ip);
| 508 sa.sin_addr.s_addr = htonl(prison_getip(cred));
|
509 sa.sin_len=sizeof (sa);
510 sa.sin_family = AF_INET;
511 error = in_pcbbind(inp, (struct sockaddr *)&sa, td);
512 if (error)
513 return (error);
514 }
515 /*
516 * Call inner routine, to assign local interface address.
517 */
518 if ((error = in_pcbladdr(inp, nam, &ifaddr)) != 0)
519 return(error);
520
521 if (in_pcblookup_hash(inp->inp_pcbinfo, sin->sin_addr, sin->sin_port,
522 inp->inp_laddr.s_addr ? inp->inp_laddr : ifaddr->sin_addr,
523 inp->inp_lport, 0, NULL) != NULL) {
524 return (EADDRINUSE);
525 }
526 if (inp->inp_laddr.s_addr == INADDR_ANY) {
527 if (inp->inp_lport == 0) {
528 error = in_pcbbind(inp, (struct sockaddr *)0, td);
529 if (error)
530 return (error);
531 }
532 inp->inp_laddr = ifaddr->sin_addr;
533 }
534 inp->inp_faddr = sin->sin_addr;
535 inp->inp_fport = sin->sin_port;
536 in_pcbrehash(inp);
537 return (0);
538}
539
540void
541in_pcbdisconnect(inp)
542 struct inpcb *inp;
543{
544
545 inp->inp_faddr.s_addr = INADDR_ANY;
546 inp->inp_fport = 0;
547 in_pcbrehash(inp);
548 if (inp->inp_socket->so_state & SS_NOFDREF)
549 in_pcbdetach(inp);
550}
551
552void
553in_pcbdetach(inp)
554 struct inpcb *inp;
555{
556 struct socket *so = inp->inp_socket;
557 struct inpcbinfo *ipi = inp->inp_pcbinfo;
558
559#ifdef IPSEC
560 ipsec4_delete_pcbpolicy(inp);
561#endif /*IPSEC*/
562 inp->inp_gencnt = ++ipi->ipi_gencnt;
563 in_pcbremlists(inp);
564 so->so_pcb = 0;
565 sotryfree(so);
566 if (inp->inp_options)
567 (void)m_free(inp->inp_options);
568 if (inp->inp_route.ro_rt)
569 rtfree(inp->inp_route.ro_rt);
570 ip_freemoptions(inp->inp_moptions);
571 inp->inp_vflag = 0;
572 zfree(ipi->ipi_zone, inp);
573}
574
575/*
576 * The calling convention of in_setsockaddr() and in_setpeeraddr() was
577 * modified to match the pru_sockaddr() and pru_peeraddr() entry points
578 * in struct pr_usrreqs, so that protocols can just reference then directly
579 * without the need for a wrapper function. The socket must have a valid
580 * (i.e., non-nil) PCB, but it should be impossible to get an invalid one
581 * except through a kernel programming error, so it is acceptable to panic
582 * (or in this case trap) if the PCB is invalid. (Actually, we don't trap
583 * because there actually /is/ a programming error somewhere... XXX)
584 */
585int
586in_setsockaddr(so, nam)
587 struct socket *so;
588 struct sockaddr **nam;
589{
590 int s;
591 register struct inpcb *inp;
592 register struct sockaddr_in *sin;
593
594 /*
595 * Do the malloc first in case it blocks.
596 */
597 MALLOC(sin, struct sockaddr_in *, sizeof *sin, M_SONAME,
598 M_WAITOK | M_ZERO);
599 sin->sin_family = AF_INET;
600 sin->sin_len = sizeof(*sin);
601
602 s = splnet();
603 inp = sotoinpcb(so);
604 if (!inp) {
605 splx(s);
606 free(sin, M_SONAME);
607 return ECONNRESET;
608 }
609 sin->sin_port = inp->inp_lport;
610 sin->sin_addr = inp->inp_laddr;
611 splx(s);
612
613 *nam = (struct sockaddr *)sin;
614 return 0;
615}
616
617int
618in_setpeeraddr(so, nam)
619 struct socket *so;
620 struct sockaddr **nam;
621{
622 int s;
623 struct inpcb *inp;
624 register struct sockaddr_in *sin;
625
626 /*
627 * Do the malloc first in case it blocks.
628 */
629 MALLOC(sin, struct sockaddr_in *, sizeof *sin, M_SONAME,
630 M_WAITOK | M_ZERO);
631 sin->sin_family = AF_INET;
632 sin->sin_len = sizeof(*sin);
633
634 s = splnet();
635 inp = sotoinpcb(so);
636 if (!inp) {
637 splx(s);
638 free(sin, M_SONAME);
639 return ECONNRESET;
640 }
641 sin->sin_port = inp->inp_fport;
642 sin->sin_addr = inp->inp_faddr;
643 splx(s);
644
645 *nam = (struct sockaddr *)sin;
646 return 0;
647}
648
649void
650in_pcbnotifyall(head, faddr, errno, notify)
651 struct inpcbhead *head;
652 struct in_addr faddr;
653 int errno;
654 void (*notify) __P((struct inpcb *, int));
655{
656 struct inpcb *inp, *ninp;
657 int s;
658
659 s = splnet();
660 for (inp = LIST_FIRST(head); inp != NULL; inp = ninp) {
661 ninp = LIST_NEXT(inp, inp_list);
662#ifdef INET6
663 if ((inp->inp_vflag & INP_IPV4) == 0)
664 continue;
665#endif
666 if (inp->inp_faddr.s_addr != faddr.s_addr ||
667 inp->inp_socket == NULL)
668 continue;
669 (*notify)(inp, errno);
670 }
671 splx(s);
672}
673
674void
675in_pcbpurgeif0(head, ifp)
676 struct inpcb *head;
677 struct ifnet *ifp;
678{
679 struct inpcb *inp;
680 struct ip_moptions *imo;
681 int i, gap;
682
683 for (inp = head; inp != NULL; inp = LIST_NEXT(inp, inp_list)) {
684 imo = inp->inp_moptions;
685 if ((inp->inp_vflag & INP_IPV4) &&
686 imo != NULL) {
687 /*
688 * Unselect the outgoing interface if it is being
689 * detached.
690 */
691 if (imo->imo_multicast_ifp == ifp)
692 imo->imo_multicast_ifp = NULL;
693
694 /*
695 * Drop multicast group membership if we joined
696 * through the interface being detached.
697 */
698 for (i = 0, gap = 0; i < imo->imo_num_memberships;
699 i++) {
700 if (imo->imo_membership[i]->inm_ifp == ifp) {
701 in_delmulti(imo->imo_membership[i]);
702 gap++;
703 } else if (gap != 0)
704 imo->imo_membership[i - gap] =
705 imo->imo_membership[i];
706 }
707 imo->imo_num_memberships -= gap;
708 }
709 }
710}
711
712/*
713 * Check for alternatives when higher level complains
714 * about service problems. For now, invalidate cached
715 * routing information. If the route was created dynamically
716 * (by a redirect), time to try a default gateway again.
717 */
718void
719in_losing(inp)
720 struct inpcb *inp;
721{
722 register struct rtentry *rt;
723 struct rt_addrinfo info;
724
725 if ((rt = inp->inp_route.ro_rt)) {
726 bzero((caddr_t)&info, sizeof(info));
727 info.rti_flags = rt->rt_flags;
728 info.rti_info[RTAX_DST] = rt_key(rt);
729 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway;
730 info.rti_info[RTAX_NETMASK] = rt_mask(rt);
731 rt_missmsg(RTM_LOSING, &info, rt->rt_flags, 0);
732 if (rt->rt_flags & RTF_DYNAMIC)
733 (void) rtrequest1(RTM_DELETE, &info, NULL);
734 inp->inp_route.ro_rt = NULL;
735 rtfree(rt);
736 /*
737 * A new route can be allocated
738 * the next time output is attempted.
739 */
740 }
741}
742
743/*
744 * After a routing change, flush old routing
745 * and allocate a (hopefully) better one.
746 */
747void
748in_rtchange(inp, errno)
749 register struct inpcb *inp;
750 int errno;
751{
752 if (inp->inp_route.ro_rt) {
753 rtfree(inp->inp_route.ro_rt);
754 inp->inp_route.ro_rt = 0;
755 /*
756 * A new route can be allocated the next time
757 * output is attempted.
758 */
759 }
760}
761
762/*
763 * Lookup a PCB based on the local address and port.
764 */
765struct inpcb *
766in_pcblookup_local(pcbinfo, laddr, lport_arg, wild_okay)
767 struct inpcbinfo *pcbinfo;
768 struct in_addr laddr;
769 u_int lport_arg;
770 int wild_okay;
771{
772 register struct inpcb *inp;
773 int matchwild = 3, wildcard;
774 u_short lport = lport_arg;
775
776 if (!wild_okay) {
777 struct inpcbhead *head;
778 /*
779 * Look for an unconnected (wildcard foreign addr) PCB that
780 * matches the local address and port we're looking for.
781 */
782 head = &pcbinfo->hashbase[INP_PCBHASH(INADDR_ANY, lport, 0, pcbinfo->hashmask)];
783 LIST_FOREACH(inp, head, inp_hash) {
784#ifdef INET6
785 if ((inp->inp_vflag & INP_IPV4) == 0)
786 continue;
787#endif
788 if (inp->inp_faddr.s_addr == INADDR_ANY &&
789 inp->inp_laddr.s_addr == laddr.s_addr &&
790 inp->inp_lport == lport) {
791 /*
792 * Found.
793 */
794 return (inp);
795 }
796 }
797 /*
798 * Not found.
799 */
800 return (NULL);
801 } else {
802 struct inpcbporthead *porthash;
803 struct inpcbport *phd;
804 struct inpcb *match = NULL;
805 /*
806 * Best fit PCB lookup.
807 *
808 * First see if this local port is in use by looking on the
809 * port hash list.
810 */
811 porthash = &pcbinfo->porthashbase[INP_PCBPORTHASH(lport,
812 pcbinfo->porthashmask)];
813 LIST_FOREACH(phd, porthash, phd_hash) {
814 if (phd->phd_port == lport)
815 break;
816 }
817 if (phd != NULL) {
818 /*
819 * Port is in use by one or more PCBs. Look for best
820 * fit.
821 */
822 LIST_FOREACH(inp, &phd->phd_pcblist, inp_portlist) {
823 wildcard = 0;
824#ifdef INET6
825 if ((inp->inp_vflag & INP_IPV4) == 0)
826 continue;
827#endif
828 if (inp->inp_faddr.s_addr != INADDR_ANY)
829 wildcard++;
830 if (inp->inp_laddr.s_addr != INADDR_ANY) {
831 if (laddr.s_addr == INADDR_ANY)
832 wildcard++;
833 else if (inp->inp_laddr.s_addr != laddr.s_addr)
834 continue;
835 } else {
836 if (laddr.s_addr != INADDR_ANY)
837 wildcard++;
838 }
839 if (wildcard < matchwild) {
840 match = inp;
841 matchwild = wildcard;
842 if (matchwild == 0) {
843 break;
844 }
845 }
846 }
847 }
848 return (match);
849 }
850}
851
852/*
853 * Lookup PCB in hash list.
854 */
855struct inpcb *
856in_pcblookup_hash(pcbinfo, faddr, fport_arg, laddr, lport_arg, wildcard,
857 ifp)
858 struct inpcbinfo *pcbinfo;
859 struct in_addr faddr, laddr;
860 u_int fport_arg, lport_arg;
861 int wildcard;
862 struct ifnet *ifp;
863{
864 struct inpcbhead *head;
865 register struct inpcb *inp;
866 u_short fport = fport_arg, lport = lport_arg;
867
868 /*
869 * First look for an exact match.
870 */
871 head = &pcbinfo->hashbase[INP_PCBHASH(faddr.s_addr, lport, fport, pcbinfo->hashmask)];
872 LIST_FOREACH(inp, head, inp_hash) {
873#ifdef INET6
874 if ((inp->inp_vflag & INP_IPV4) == 0)
875 continue;
876#endif
877 if (inp->inp_faddr.s_addr == faddr.s_addr &&
878 inp->inp_laddr.s_addr == laddr.s_addr &&
879 inp->inp_fport == fport &&
880 inp->inp_lport == lport) {
881 /*
882 * Found.
883 */
884 return (inp);
885 }
886 }
887 if (wildcard) {
888 struct inpcb *local_wild = NULL;
889#if defined(INET6)
890 struct inpcb *local_wild_mapped = NULL;
891#endif /* defined(INET6) */
892
893 head = &pcbinfo->hashbase[INP_PCBHASH(INADDR_ANY, lport, 0, pcbinfo->hashmask)];
894 LIST_FOREACH(inp, head, inp_hash) {
895#ifdef INET6
896 if ((inp->inp_vflag & INP_IPV4) == 0)
897 continue;
898#endif
899 if (inp->inp_faddr.s_addr == INADDR_ANY &&
900 inp->inp_lport == lport) {
901 if (ifp && ifp->if_type == IFT_FAITH &&
902 (inp->inp_flags & INP_FAITH) == 0)
903 continue;
904 if (inp->inp_laddr.s_addr == laddr.s_addr)
905 return (inp);
906 else if (inp->inp_laddr.s_addr == INADDR_ANY) {
907#if defined(INET6)
908 if (INP_CHECK_SOCKAF(inp->inp_socket,
909 AF_INET6))
910 local_wild_mapped = inp;
911 else
912#endif /* defined(INET6) */
913 local_wild = inp;
914 }
915 }
916 }
917#if defined(INET6)
918 if (local_wild == NULL)
919 return (local_wild_mapped);
920#endif /* defined(INET6) */
921 return (local_wild);
922 }
923
924 /*
925 * Not found.
926 */
927 return (NULL);
928}
929
930/*
931 * Insert PCB onto various hash lists.
932 */
933int
934in_pcbinshash(inp)
935 struct inpcb *inp;
936{
937 struct inpcbhead *pcbhash;
938 struct inpcbporthead *pcbporthash;
939 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
940 struct inpcbport *phd;
941 u_int32_t hashkey_faddr;
942
943#ifdef INET6
944 if (inp->inp_vflag & INP_IPV6)
945 hashkey_faddr = inp->in6p_faddr.s6_addr32[3] /* XXX */;
946 else
947#endif /* INET6 */
948 hashkey_faddr = inp->inp_faddr.s_addr;
949
950 pcbhash = &pcbinfo->hashbase[INP_PCBHASH(hashkey_faddr,
951 inp->inp_lport, inp->inp_fport, pcbinfo->hashmask)];
952
953 pcbporthash = &pcbinfo->porthashbase[INP_PCBPORTHASH(inp->inp_lport,
954 pcbinfo->porthashmask)];
955
956 /*
957 * Go through port list and look for a head for this lport.
958 */
959 LIST_FOREACH(phd, pcbporthash, phd_hash) {
960 if (phd->phd_port == inp->inp_lport)
961 break;
962 }
963 /*
964 * If none exists, malloc one and tack it on.
965 */
966 if (phd == NULL) {
967 MALLOC(phd, struct inpcbport *, sizeof(struct inpcbport), M_PCB, M_NOWAIT);
968 if (phd == NULL) {
969 return (ENOBUFS); /* XXX */
970 }
971 phd->phd_port = inp->inp_lport;
972 LIST_INIT(&phd->phd_pcblist);
973 LIST_INSERT_HEAD(pcbporthash, phd, phd_hash);
974 }
975 inp->inp_phd = phd;
976 LIST_INSERT_HEAD(&phd->phd_pcblist, inp, inp_portlist);
977 LIST_INSERT_HEAD(pcbhash, inp, inp_hash);
978 return (0);
979}
980
981/*
982 * Move PCB to the proper hash bucket when { faddr, fport } have been
983 * changed. NOTE: This does not handle the case of the lport changing (the
984 * hashed port list would have to be updated as well), so the lport must
985 * not change after in_pcbinshash() has been called.
986 */
987void
988in_pcbrehash(inp)
989 struct inpcb *inp;
990{
991 struct inpcbhead *head;
992 u_int32_t hashkey_faddr;
993
994#ifdef INET6
995 if (inp->inp_vflag & INP_IPV6)
996 hashkey_faddr = inp->in6p_faddr.s6_addr32[3] /* XXX */;
997 else
998#endif /* INET6 */
999 hashkey_faddr = inp->inp_faddr.s_addr;
1000
1001 head = &inp->inp_pcbinfo->hashbase[INP_PCBHASH(hashkey_faddr,
1002 inp->inp_lport, inp->inp_fport, inp->inp_pcbinfo->hashmask)];
1003
1004 LIST_REMOVE(inp, inp_hash);
1005 LIST_INSERT_HEAD(head, inp, inp_hash);
1006}
1007
1008/*
1009 * Remove PCB from various lists.
1010 */
1011void
1012in_pcbremlists(inp)
1013 struct inpcb *inp;
1014{
1015 inp->inp_gencnt = ++inp->inp_pcbinfo->ipi_gencnt;
1016 if (inp->inp_lport) {
1017 struct inpcbport *phd = inp->inp_phd;
1018
1019 LIST_REMOVE(inp, inp_hash);
1020 LIST_REMOVE(inp, inp_portlist);
1021 if (LIST_FIRST(&phd->phd_pcblist) == NULL) {
1022 LIST_REMOVE(phd, phd_hash);
1023 free(phd, M_PCB);
1024 }
1025 }
1026 LIST_REMOVE(inp, inp_list);
1027 inp->inp_pcbinfo->ipi_count--;
1028}
1029
1030int
1031prison_xinpcb(struct proc *p, struct inpcb *inp)
1032{
1033 if (!jailed(p->p_ucred))
1034 return (0);
| 509 sa.sin_len=sizeof (sa);
510 sa.sin_family = AF_INET;
511 error = in_pcbbind(inp, (struct sockaddr *)&sa, td);
512 if (error)
513 return (error);
514 }
515 /*
516 * Call inner routine, to assign local interface address.
517 */
518 if ((error = in_pcbladdr(inp, nam, &ifaddr)) != 0)
519 return(error);
520
521 if (in_pcblookup_hash(inp->inp_pcbinfo, sin->sin_addr, sin->sin_port,
522 inp->inp_laddr.s_addr ? inp->inp_laddr : ifaddr->sin_addr,
523 inp->inp_lport, 0, NULL) != NULL) {
524 return (EADDRINUSE);
525 }
526 if (inp->inp_laddr.s_addr == INADDR_ANY) {
527 if (inp->inp_lport == 0) {
528 error = in_pcbbind(inp, (struct sockaddr *)0, td);
529 if (error)
530 return (error);
531 }
532 inp->inp_laddr = ifaddr->sin_addr;
533 }
534 inp->inp_faddr = sin->sin_addr;
535 inp->inp_fport = sin->sin_port;
536 in_pcbrehash(inp);
537 return (0);
538}
539
540void
541in_pcbdisconnect(inp)
542 struct inpcb *inp;
543{
544
545 inp->inp_faddr.s_addr = INADDR_ANY;
546 inp->inp_fport = 0;
547 in_pcbrehash(inp);
548 if (inp->inp_socket->so_state & SS_NOFDREF)
549 in_pcbdetach(inp);
550}
551
552void
553in_pcbdetach(inp)
554 struct inpcb *inp;
555{
556 struct socket *so = inp->inp_socket;
557 struct inpcbinfo *ipi = inp->inp_pcbinfo;
558
559#ifdef IPSEC
560 ipsec4_delete_pcbpolicy(inp);
561#endif /*IPSEC*/
562 inp->inp_gencnt = ++ipi->ipi_gencnt;
563 in_pcbremlists(inp);
564 so->so_pcb = 0;
565 sotryfree(so);
566 if (inp->inp_options)
567 (void)m_free(inp->inp_options);
568 if (inp->inp_route.ro_rt)
569 rtfree(inp->inp_route.ro_rt);
570 ip_freemoptions(inp->inp_moptions);
571 inp->inp_vflag = 0;
572 zfree(ipi->ipi_zone, inp);
573}
574
575/*
576 * The calling convention of in_setsockaddr() and in_setpeeraddr() was
577 * modified to match the pru_sockaddr() and pru_peeraddr() entry points
578 * in struct pr_usrreqs, so that protocols can just reference then directly
579 * without the need for a wrapper function. The socket must have a valid
580 * (i.e., non-nil) PCB, but it should be impossible to get an invalid one
581 * except through a kernel programming error, so it is acceptable to panic
582 * (or in this case trap) if the PCB is invalid. (Actually, we don't trap
583 * because there actually /is/ a programming error somewhere... XXX)
584 */
585int
586in_setsockaddr(so, nam)
587 struct socket *so;
588 struct sockaddr **nam;
589{
590 int s;
591 register struct inpcb *inp;
592 register struct sockaddr_in *sin;
593
594 /*
595 * Do the malloc first in case it blocks.
596 */
597 MALLOC(sin, struct sockaddr_in *, sizeof *sin, M_SONAME,
598 M_WAITOK | M_ZERO);
599 sin->sin_family = AF_INET;
600 sin->sin_len = sizeof(*sin);
601
602 s = splnet();
603 inp = sotoinpcb(so);
604 if (!inp) {
605 splx(s);
606 free(sin, M_SONAME);
607 return ECONNRESET;
608 }
609 sin->sin_port = inp->inp_lport;
610 sin->sin_addr = inp->inp_laddr;
611 splx(s);
612
613 *nam = (struct sockaddr *)sin;
614 return 0;
615}
616
617int
618in_setpeeraddr(so, nam)
619 struct socket *so;
620 struct sockaddr **nam;
621{
622 int s;
623 struct inpcb *inp;
624 register struct sockaddr_in *sin;
625
626 /*
627 * Do the malloc first in case it blocks.
628 */
629 MALLOC(sin, struct sockaddr_in *, sizeof *sin, M_SONAME,
630 M_WAITOK | M_ZERO);
631 sin->sin_family = AF_INET;
632 sin->sin_len = sizeof(*sin);
633
634 s = splnet();
635 inp = sotoinpcb(so);
636 if (!inp) {
637 splx(s);
638 free(sin, M_SONAME);
639 return ECONNRESET;
640 }
641 sin->sin_port = inp->inp_fport;
642 sin->sin_addr = inp->inp_faddr;
643 splx(s);
644
645 *nam = (struct sockaddr *)sin;
646 return 0;
647}
648
649void
650in_pcbnotifyall(head, faddr, errno, notify)
651 struct inpcbhead *head;
652 struct in_addr faddr;
653 int errno;
654 void (*notify) __P((struct inpcb *, int));
655{
656 struct inpcb *inp, *ninp;
657 int s;
658
659 s = splnet();
660 for (inp = LIST_FIRST(head); inp != NULL; inp = ninp) {
661 ninp = LIST_NEXT(inp, inp_list);
662#ifdef INET6
663 if ((inp->inp_vflag & INP_IPV4) == 0)
664 continue;
665#endif
666 if (inp->inp_faddr.s_addr != faddr.s_addr ||
667 inp->inp_socket == NULL)
668 continue;
669 (*notify)(inp, errno);
670 }
671 splx(s);
672}
673
674void
675in_pcbpurgeif0(head, ifp)
676 struct inpcb *head;
677 struct ifnet *ifp;
678{
679 struct inpcb *inp;
680 struct ip_moptions *imo;
681 int i, gap;
682
683 for (inp = head; inp != NULL; inp = LIST_NEXT(inp, inp_list)) {
684 imo = inp->inp_moptions;
685 if ((inp->inp_vflag & INP_IPV4) &&
686 imo != NULL) {
687 /*
688 * Unselect the outgoing interface if it is being
689 * detached.
690 */
691 if (imo->imo_multicast_ifp == ifp)
692 imo->imo_multicast_ifp = NULL;
693
694 /*
695 * Drop multicast group membership if we joined
696 * through the interface being detached.
697 */
698 for (i = 0, gap = 0; i < imo->imo_num_memberships;
699 i++) {
700 if (imo->imo_membership[i]->inm_ifp == ifp) {
701 in_delmulti(imo->imo_membership[i]);
702 gap++;
703 } else if (gap != 0)
704 imo->imo_membership[i - gap] =
705 imo->imo_membership[i];
706 }
707 imo->imo_num_memberships -= gap;
708 }
709 }
710}
711
712/*
713 * Check for alternatives when higher level complains
714 * about service problems. For now, invalidate cached
715 * routing information. If the route was created dynamically
716 * (by a redirect), time to try a default gateway again.
717 */
718void
719in_losing(inp)
720 struct inpcb *inp;
721{
722 register struct rtentry *rt;
723 struct rt_addrinfo info;
724
725 if ((rt = inp->inp_route.ro_rt)) {
726 bzero((caddr_t)&info, sizeof(info));
727 info.rti_flags = rt->rt_flags;
728 info.rti_info[RTAX_DST] = rt_key(rt);
729 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway;
730 info.rti_info[RTAX_NETMASK] = rt_mask(rt);
731 rt_missmsg(RTM_LOSING, &info, rt->rt_flags, 0);
732 if (rt->rt_flags & RTF_DYNAMIC)
733 (void) rtrequest1(RTM_DELETE, &info, NULL);
734 inp->inp_route.ro_rt = NULL;
735 rtfree(rt);
736 /*
737 * A new route can be allocated
738 * the next time output is attempted.
739 */
740 }
741}
742
743/*
744 * After a routing change, flush old routing
745 * and allocate a (hopefully) better one.
746 */
747void
748in_rtchange(inp, errno)
749 register struct inpcb *inp;
750 int errno;
751{
752 if (inp->inp_route.ro_rt) {
753 rtfree(inp->inp_route.ro_rt);
754 inp->inp_route.ro_rt = 0;
755 /*
756 * A new route can be allocated the next time
757 * output is attempted.
758 */
759 }
760}
761
762/*
763 * Lookup a PCB based on the local address and port.
764 */
765struct inpcb *
766in_pcblookup_local(pcbinfo, laddr, lport_arg, wild_okay)
767 struct inpcbinfo *pcbinfo;
768 struct in_addr laddr;
769 u_int lport_arg;
770 int wild_okay;
771{
772 register struct inpcb *inp;
773 int matchwild = 3, wildcard;
774 u_short lport = lport_arg;
775
776 if (!wild_okay) {
777 struct inpcbhead *head;
778 /*
779 * Look for an unconnected (wildcard foreign addr) PCB that
780 * matches the local address and port we're looking for.
781 */
782 head = &pcbinfo->hashbase[INP_PCBHASH(INADDR_ANY, lport, 0, pcbinfo->hashmask)];
783 LIST_FOREACH(inp, head, inp_hash) {
784#ifdef INET6
785 if ((inp->inp_vflag & INP_IPV4) == 0)
786 continue;
787#endif
788 if (inp->inp_faddr.s_addr == INADDR_ANY &&
789 inp->inp_laddr.s_addr == laddr.s_addr &&
790 inp->inp_lport == lport) {
791 /*
792 * Found.
793 */
794 return (inp);
795 }
796 }
797 /*
798 * Not found.
799 */
800 return (NULL);
801 } else {
802 struct inpcbporthead *porthash;
803 struct inpcbport *phd;
804 struct inpcb *match = NULL;
805 /*
806 * Best fit PCB lookup.
807 *
808 * First see if this local port is in use by looking on the
809 * port hash list.
810 */
811 porthash = &pcbinfo->porthashbase[INP_PCBPORTHASH(lport,
812 pcbinfo->porthashmask)];
813 LIST_FOREACH(phd, porthash, phd_hash) {
814 if (phd->phd_port == lport)
815 break;
816 }
817 if (phd != NULL) {
818 /*
819 * Port is in use by one or more PCBs. Look for best
820 * fit.
821 */
822 LIST_FOREACH(inp, &phd->phd_pcblist, inp_portlist) {
823 wildcard = 0;
824#ifdef INET6
825 if ((inp->inp_vflag & INP_IPV4) == 0)
826 continue;
827#endif
828 if (inp->inp_faddr.s_addr != INADDR_ANY)
829 wildcard++;
830 if (inp->inp_laddr.s_addr != INADDR_ANY) {
831 if (laddr.s_addr == INADDR_ANY)
832 wildcard++;
833 else if (inp->inp_laddr.s_addr != laddr.s_addr)
834 continue;
835 } else {
836 if (laddr.s_addr != INADDR_ANY)
837 wildcard++;
838 }
839 if (wildcard < matchwild) {
840 match = inp;
841 matchwild = wildcard;
842 if (matchwild == 0) {
843 break;
844 }
845 }
846 }
847 }
848 return (match);
849 }
850}
851
852/*
853 * Lookup PCB in hash list.
854 */
855struct inpcb *
856in_pcblookup_hash(pcbinfo, faddr, fport_arg, laddr, lport_arg, wildcard,
857 ifp)
858 struct inpcbinfo *pcbinfo;
859 struct in_addr faddr, laddr;
860 u_int fport_arg, lport_arg;
861 int wildcard;
862 struct ifnet *ifp;
863{
864 struct inpcbhead *head;
865 register struct inpcb *inp;
866 u_short fport = fport_arg, lport = lport_arg;
867
868 /*
869 * First look for an exact match.
870 */
871 head = &pcbinfo->hashbase[INP_PCBHASH(faddr.s_addr, lport, fport, pcbinfo->hashmask)];
872 LIST_FOREACH(inp, head, inp_hash) {
873#ifdef INET6
874 if ((inp->inp_vflag & INP_IPV4) == 0)
875 continue;
876#endif
877 if (inp->inp_faddr.s_addr == faddr.s_addr &&
878 inp->inp_laddr.s_addr == laddr.s_addr &&
879 inp->inp_fport == fport &&
880 inp->inp_lport == lport) {
881 /*
882 * Found.
883 */
884 return (inp);
885 }
886 }
887 if (wildcard) {
888 struct inpcb *local_wild = NULL;
889#if defined(INET6)
890 struct inpcb *local_wild_mapped = NULL;
891#endif /* defined(INET6) */
892
893 head = &pcbinfo->hashbase[INP_PCBHASH(INADDR_ANY, lport, 0, pcbinfo->hashmask)];
894 LIST_FOREACH(inp, head, inp_hash) {
895#ifdef INET6
896 if ((inp->inp_vflag & INP_IPV4) == 0)
897 continue;
898#endif
899 if (inp->inp_faddr.s_addr == INADDR_ANY &&
900 inp->inp_lport == lport) {
901 if (ifp && ifp->if_type == IFT_FAITH &&
902 (inp->inp_flags & INP_FAITH) == 0)
903 continue;
904 if (inp->inp_laddr.s_addr == laddr.s_addr)
905 return (inp);
906 else if (inp->inp_laddr.s_addr == INADDR_ANY) {
907#if defined(INET6)
908 if (INP_CHECK_SOCKAF(inp->inp_socket,
909 AF_INET6))
910 local_wild_mapped = inp;
911 else
912#endif /* defined(INET6) */
913 local_wild = inp;
914 }
915 }
916 }
917#if defined(INET6)
918 if (local_wild == NULL)
919 return (local_wild_mapped);
920#endif /* defined(INET6) */
921 return (local_wild);
922 }
923
924 /*
925 * Not found.
926 */
927 return (NULL);
928}
929
930/*
931 * Insert PCB onto various hash lists.
932 */
933int
934in_pcbinshash(inp)
935 struct inpcb *inp;
936{
937 struct inpcbhead *pcbhash;
938 struct inpcbporthead *pcbporthash;
939 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
940 struct inpcbport *phd;
941 u_int32_t hashkey_faddr;
942
943#ifdef INET6
944 if (inp->inp_vflag & INP_IPV6)
945 hashkey_faddr = inp->in6p_faddr.s6_addr32[3] /* XXX */;
946 else
947#endif /* INET6 */
948 hashkey_faddr = inp->inp_faddr.s_addr;
949
950 pcbhash = &pcbinfo->hashbase[INP_PCBHASH(hashkey_faddr,
951 inp->inp_lport, inp->inp_fport, pcbinfo->hashmask)];
952
953 pcbporthash = &pcbinfo->porthashbase[INP_PCBPORTHASH(inp->inp_lport,
954 pcbinfo->porthashmask)];
955
956 /*
957 * Go through port list and look for a head for this lport.
958 */
959 LIST_FOREACH(phd, pcbporthash, phd_hash) {
960 if (phd->phd_port == inp->inp_lport)
961 break;
962 }
963 /*
964 * If none exists, malloc one and tack it on.
965 */
966 if (phd == NULL) {
967 MALLOC(phd, struct inpcbport *, sizeof(struct inpcbport), M_PCB, M_NOWAIT);
968 if (phd == NULL) {
969 return (ENOBUFS); /* XXX */
970 }
971 phd->phd_port = inp->inp_lport;
972 LIST_INIT(&phd->phd_pcblist);
973 LIST_INSERT_HEAD(pcbporthash, phd, phd_hash);
974 }
975 inp->inp_phd = phd;
976 LIST_INSERT_HEAD(&phd->phd_pcblist, inp, inp_portlist);
977 LIST_INSERT_HEAD(pcbhash, inp, inp_hash);
978 return (0);
979}
980
981/*
982 * Move PCB to the proper hash bucket when { faddr, fport } have been
983 * changed. NOTE: This does not handle the case of the lport changing (the
984 * hashed port list would have to be updated as well), so the lport must
985 * not change after in_pcbinshash() has been called.
986 */
987void
988in_pcbrehash(inp)
989 struct inpcb *inp;
990{
991 struct inpcbhead *head;
992 u_int32_t hashkey_faddr;
993
994#ifdef INET6
995 if (inp->inp_vflag & INP_IPV6)
996 hashkey_faddr = inp->in6p_faddr.s6_addr32[3] /* XXX */;
997 else
998#endif /* INET6 */
999 hashkey_faddr = inp->inp_faddr.s_addr;
1000
1001 head = &inp->inp_pcbinfo->hashbase[INP_PCBHASH(hashkey_faddr,
1002 inp->inp_lport, inp->inp_fport, inp->inp_pcbinfo->hashmask)];
1003
1004 LIST_REMOVE(inp, inp_hash);
1005 LIST_INSERT_HEAD(head, inp, inp_hash);
1006}
1007
1008/*
1009 * Remove PCB from various lists.
1010 */
1011void
1012in_pcbremlists(inp)
1013 struct inpcb *inp;
1014{
1015 inp->inp_gencnt = ++inp->inp_pcbinfo->ipi_gencnt;
1016 if (inp->inp_lport) {
1017 struct inpcbport *phd = inp->inp_phd;
1018
1019 LIST_REMOVE(inp, inp_hash);
1020 LIST_REMOVE(inp, inp_portlist);
1021 if (LIST_FIRST(&phd->phd_pcblist) == NULL) {
1022 LIST_REMOVE(phd, phd_hash);
1023 free(phd, M_PCB);
1024 }
1025 }
1026 LIST_REMOVE(inp, inp_list);
1027 inp->inp_pcbinfo->ipi_count--;
1028}
1029
1030int
1031prison_xinpcb(struct proc *p, struct inpcb *inp)
1032{
1033 if (!jailed(p->p_ucred))
1034 return (0);
|
1035 if (ntohl(inp->inp_laddr.s_addr) == p->p_ucred->cr_prison->pr_ip)
| 1035 if (ntohl(inp->inp_laddr.s_addr) == prison_getip(p->p_ucred))
|
1036 return (0);
1037 return (1);
1038}
| 1036 return (0);
1037 return (1);
1038}
|