kernel - Replace zalloc zones with kmalloc for PCBs
[dragonfly.git] / sys / netinet / in_pcb.c
1 /*
2  * Copyright (c) 2004 Jeffrey M. Hsu.  All rights reserved.
3  * Copyright (c) 2004 The DragonFly Project.  All rights reserved.
4  *
5  * This code is derived from software contributed to The DragonFly Project
6  * by Jeffrey M. Hsu.
7  *
8  * Redistribution and use in source and binary forms, with or without
9  * modification, are permitted provided that the following conditions
10  * are met:
11  * 1. Redistributions of source code must retain the above copyright
12  *    notice, this list of conditions and the following disclaimer.
13  * 2. Redistributions in binary form must reproduce the above copyright
14  *    notice, this list of conditions and the following disclaimer in the
15  *    documentation and/or other materials provided with the distribution.
16  * 3. Neither the name of The DragonFly Project nor the names of its
17  *    contributors may be used to endorse or promote products derived
18  *    from this software without specific, prior written permission.
19  *
20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
23  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
24  * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
25  * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
26  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
27  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
28  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
29  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
30  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31  * SUCH DAMAGE.
32  */
33
34 /*
35  * Copyright (c) 1982, 1986, 1991, 1993, 1995
36  *      The Regents of the University of California.  All rights reserved.
37  *
38  * Redistribution and use in source and binary forms, with or without
39  * modification, are permitted provided that the following conditions
40  * are met:
41  * 1. Redistributions of source code must retain the above copyright
42  *    notice, this list of conditions and the following disclaimer.
43  * 2. Redistributions in binary form must reproduce the above copyright
44  *    notice, this list of conditions and the following disclaimer in the
45  *    documentation and/or other materials provided with the distribution.
46  * 3. All advertising materials mentioning features or use of this software
47  *    must display the following acknowledgement:
48  *      This product includes software developed by the University of
49  *      California, Berkeley and its contributors.
50  * 4. Neither the name of the University nor the names of its contributors
51  *    may be used to endorse or promote products derived from this software
52  *    without specific prior written permission.
53  *
54  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
55  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
56  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
57  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
58  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
59  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
60  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
61  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
62  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
63  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
64  * SUCH DAMAGE.
65  *
66  *      @(#)in_pcb.c    8.4 (Berkeley) 5/24/95
67  * $FreeBSD: src/sys/netinet/in_pcb.c,v 1.59.2.27 2004/01/02 04:06:42 ambrisko Exp $
68  * $DragonFly: src/sys/netinet/in_pcb.c,v 1.48 2008/11/08 03:38:23 sephe Exp $
69  */
70
71 #include "opt_ipsec.h"
72 #include "opt_inet6.h"
73
74 #include <sys/param.h>
75 #include <sys/systm.h>
76 #include <sys/malloc.h>
77 #include <sys/mbuf.h>
78 #include <sys/domain.h>
79 #include <sys/protosw.h>
80 #include <sys/socket.h>
81 #include <sys/socketvar.h>
82 #include <sys/proc.h>
83 #include <sys/priv.h>
84 #include <sys/jail.h>
85 #include <sys/kernel.h>
86 #include <sys/sysctl.h>
87 #include <sys/thread2.h>
88
89 #include <machine/limits.h>
90
91 #include <net/if.h>
92 #include <net/if_types.h>
93 #include <net/route.h>
94
95 #include <netinet/in.h>
96 #include <netinet/in_pcb.h>
97 #include <netinet/in_var.h>
98 #include <netinet/ip_var.h>
99 #ifdef INET6
100 #include <netinet/ip6.h>
101 #include <netinet6/ip6_var.h>
102 #endif /* INET6 */
103
104 #ifdef IPSEC
105 #include <netinet6/ipsec.h>
106 #include <netproto/key/key.h>
107 #endif
108
109 #ifdef FAST_IPSEC
110 #if defined(IPSEC) || defined(IPSEC_ESP)
111 #error "Bad idea: don't compile with both IPSEC and FAST_IPSEC!"
112 #endif
113
114 #include <netproto/ipsec/ipsec.h>
115 #include <netproto/ipsec/key.h>
116 #define IPSEC
117 #endif /* FAST_IPSEC */
118
119 struct in_addr zeroin_addr;
120
121 /*
122  * These configure the range of local port addresses assigned to
123  * "unspecified" outgoing connections/packets/whatever.
124  */
125 int ipport_lowfirstauto = IPPORT_RESERVED - 1;  /* 1023 */
126 int ipport_lowlastauto = IPPORT_RESERVEDSTART;  /* 600 */
127
128 int ipport_firstauto = IPPORT_RESERVED;         /* 1024 */
129 int ipport_lastauto = IPPORT_USERRESERVED;      /* 5000 */
130
131 int ipport_hifirstauto = IPPORT_HIFIRSTAUTO;    /* 49152 */
132 int ipport_hilastauto = IPPORT_HILASTAUTO;      /* 65535 */
133
134 static __inline void
135 RANGECHK(int var, int min, int max)
136 {
137         if (var < min)
138                 var = min;
139         else if (var > max)
140                 var = max;
141 }
142
143 static int
144 sysctl_net_ipport_check(SYSCTL_HANDLER_ARGS)
145 {
146         int error;
147
148         error = sysctl_handle_int(oidp, oidp->oid_arg1, oidp->oid_arg2, req);
149         if (!error) {
150                 RANGECHK(ipport_lowfirstauto, 1, IPPORT_RESERVED - 1);
151                 RANGECHK(ipport_lowlastauto, 1, IPPORT_RESERVED - 1);
152
153                 RANGECHK(ipport_firstauto, IPPORT_RESERVED, USHRT_MAX);
154                 RANGECHK(ipport_lastauto, IPPORT_RESERVED, USHRT_MAX);
155
156                 RANGECHK(ipport_hifirstauto, IPPORT_RESERVED, USHRT_MAX);
157                 RANGECHK(ipport_hilastauto, IPPORT_RESERVED, USHRT_MAX);
158         }
159         return (error);
160 }
161
162 SYSCTL_NODE(_net_inet_ip, IPPROTO_IP, portrange, CTLFLAG_RW, 0, "IP Ports");
163
164 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, lowfirst, CTLTYPE_INT|CTLFLAG_RW,
165            &ipport_lowfirstauto, 0, &sysctl_net_ipport_check, "I", "");
166 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, lowlast, CTLTYPE_INT|CTLFLAG_RW,
167            &ipport_lowlastauto, 0, &sysctl_net_ipport_check, "I", "");
168 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, first, CTLTYPE_INT|CTLFLAG_RW,
169            &ipport_firstauto, 0, &sysctl_net_ipport_check, "I", "");
170 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, last, CTLTYPE_INT|CTLFLAG_RW,
171            &ipport_lastauto, 0, &sysctl_net_ipport_check, "I", "");
172 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, hifirst, CTLTYPE_INT|CTLFLAG_RW,
173            &ipport_hifirstauto, 0, &sysctl_net_ipport_check, "I", "");
174 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, hilast, CTLTYPE_INT|CTLFLAG_RW,
175            &ipport_hilastauto, 0, &sysctl_net_ipport_check, "I", "");
176
177 /*
178  * in_pcb.c: manage the Protocol Control Blocks.
179  *
180  * NOTE: It is assumed that most of these functions will be called from
181  * a critical section.  XXX - There are, unfortunately, a few exceptions
182  * to this rule that should be fixed.
183  *
184  * NOTE: The caller should initialize the cpu field to the cpu running the
185  * protocol stack associated with this inpcbinfo.
186  */
187
188 void
189 in_pcbinfo_init(struct inpcbinfo *pcbinfo)
190 {
191         LIST_INIT(&pcbinfo->pcblisthead);
192         pcbinfo->cpu = -1;
193 }
194
195 /*
196  * Allocate a PCB and associate it with the socket.
197  */
198 int
199 in_pcballoc(struct socket *so, struct inpcbinfo *pcbinfo)
200 {
201         struct inpcb *inp;
202 #ifdef IPSEC
203         int error;
204 #endif
205
206         inp = kmalloc(pcbinfo->ipi_size, M_PCB, M_WAITOK|M_ZERO);
207         inp->inp_gencnt = ++pcbinfo->ipi_gencnt;
208         inp->inp_pcbinfo = inp->inp_cpcbinfo = pcbinfo;
209         inp->inp_socket = so;
210 #ifdef IPSEC
211         error = ipsec_init_policy(so, &inp->inp_sp);
212         if (error != 0) {
213                 kfree(inp, M_PCB);
214                 return (error);
215         }
216 #endif
217 #ifdef INET6
218         if (INP_SOCKAF(so) == AF_INET6 && ip6_v6only)
219                 inp->inp_flags |= IN6P_IPV6_V6ONLY;
220         if (ip6_auto_flowlabel)
221                 inp->inp_flags |= IN6P_AUTOFLOWLABEL;
222 #endif
223         so->so_pcb = inp;
224         LIST_INSERT_HEAD(&pcbinfo->pcblisthead, inp, inp_list);
225         pcbinfo->ipi_count++;
226         return (0);
227 }
228
229 int
230 in_pcbbind(struct inpcb *inp, struct sockaddr *nam, struct thread *td)
231 {
232         struct socket *so = inp->inp_socket;
233         struct proc *p = td->td_proc;
234         unsigned short *lastport;
235         struct sockaddr_in *sin;
236         struct sockaddr_in jsin;
237         struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
238         struct ucred *cred = NULL;
239         u_short lport = 0;
240         int wild = 0, reuseport = (so->so_options & SO_REUSEPORT);
241         int error;
242
243         KKASSERT(p);
244
245         if (TAILQ_EMPTY(&in_ifaddrheads[mycpuid])) /* XXX broken! */
246                 return (EADDRNOTAVAIL);
247         if (inp->inp_lport != 0 || inp->inp_laddr.s_addr != INADDR_ANY)
248                 return (EINVAL);        /* already bound */
249         if (!(so->so_options & (SO_REUSEADDR|SO_REUSEPORT)))
250                 wild = 1;    /* neither SO_REUSEADDR nor SO_REUSEPORT is set */
251         if (p)
252                 cred = p->p_ucred;
253         if (nam != NULL) {
254                 sin = (struct sockaddr_in *)nam;
255                 if (nam->sa_len != sizeof *sin)
256                         return (EINVAL);
257 #ifdef notdef
258                 /*
259                  * We should check the family, but old programs
260                  * incorrectly fail to initialize it.
261                  */
262                 if (sin->sin_family != AF_INET)
263                         return (EAFNOSUPPORT);
264 #endif
265                 if (!prison_replace_wildcards(td, nam))
266                                 return (EINVAL);
267                 lport = sin->sin_port;
268                 if (IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
269                         /*
270                          * Treat SO_REUSEADDR as SO_REUSEPORT for multicast;
271                          * allow complete duplication of binding if
272                          * SO_REUSEPORT is set, or if SO_REUSEADDR is set
273                          * and a multicast address is bound on both
274                          * new and duplicated sockets.
275                          */
276                         if (so->so_options & SO_REUSEADDR)
277                                 reuseport = SO_REUSEADDR | SO_REUSEPORT;
278                 } else if (sin->sin_addr.s_addr != INADDR_ANY) {
279                         sin->sin_port = 0;              /* yech... */
280                         bzero(&sin->sin_zero, sizeof sin->sin_zero);
281                         if (ifa_ifwithaddr((struct sockaddr *)sin) == NULL)
282                                 return (EADDRNOTAVAIL);
283                 }
284                 if (lport != 0) {
285                         struct inpcb *t;
286
287                         /* GROSS */
288                         if (ntohs(lport) < IPPORT_RESERVED &&
289                             cred && priv_check_cred(cred, PRIV_NETINET_RESERVEDPORT, 0))
290                                 return (EACCES);
291                         if (so->so_cred->cr_uid != 0 &&
292                             !IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
293                                 t = in_pcblookup_local(inp->inp_pcbinfo,
294                                     sin->sin_addr, lport,
295                                     INPLOOKUP_WILDCARD, cred);
296                                 if (t &&
297                                     (!in_nullhost(sin->sin_addr) ||
298                                      !in_nullhost(t->inp_laddr) ||
299                                      (t->inp_socket->so_options &
300                                          SO_REUSEPORT) == 0) &&
301                                     (so->so_cred->cr_uid !=
302                                      t->inp_socket->so_cred->cr_uid)) {
303 #ifdef INET6
304                                         if (!in_nullhost(sin->sin_addr) ||
305                                             !in_nullhost(t->inp_laddr) ||
306                                             INP_SOCKAF(so) ==
307                                             INP_SOCKAF(t->inp_socket))
308 #endif
309                                         return (EADDRINUSE);
310                                 }
311                         }
312                         if (cred && !prison_replace_wildcards(td, nam))
313                                 return (EADDRNOTAVAIL);
314                         t = in_pcblookup_local(pcbinfo, sin->sin_addr, lport,
315                                                wild, cred);
316                         if (t && !(reuseport & t->inp_socket->so_options)) {
317 #ifdef INET6
318                                 if (!in_nullhost(sin->sin_addr) ||
319                                     !in_nullhost(t->inp_laddr) ||
320                                     INP_SOCKAF(so) == INP_SOCKAF(t->inp_socket))
321 #endif
322                                 return (EADDRINUSE);
323                         }
324                 }
325                 inp->inp_laddr = sin->sin_addr;
326         }
327         if (lport == 0) {
328                 ushort first, last;
329                 int count;
330
331                 jsin.sin_family = AF_INET;
332                 jsin.sin_addr.s_addr = inp->inp_laddr.s_addr;
333                 if (!prison_replace_wildcards(td, (struct sockaddr *)&jsin)) {
334                         inp->inp_laddr.s_addr = INADDR_ANY;
335                         return (EINVAL);
336                 }
337                 inp->inp_laddr.s_addr = jsin.sin_addr.s_addr;
338
339                 inp->inp_flags |= INP_ANONPORT;
340
341                 if (inp->inp_flags & INP_HIGHPORT) {
342                         first = ipport_hifirstauto;     /* sysctl */
343                         last  = ipport_hilastauto;
344                         lastport = &pcbinfo->lasthi;
345                 } else if (inp->inp_flags & INP_LOWPORT) {
346                         if (cred &&
347                             (error = priv_check_cred(cred, PRIV_NETINET_RESERVEDPORT, 0))) {
348                                 inp->inp_laddr.s_addr = INADDR_ANY;
349                                 return (error);
350                         }
351                         first = ipport_lowfirstauto;    /* 1023 */
352                         last  = ipport_lowlastauto;     /* 600 */
353                         lastport = &pcbinfo->lastlow;
354                 } else {
355                         first = ipport_firstauto;       /* sysctl */
356                         last  = ipport_lastauto;
357                         lastport = &pcbinfo->lastport;
358                 }
359                 /*
360                  * Simple check to ensure all ports are not used up causing
361                  * a deadlock here.
362                  *
363                  * We split the two cases (up and down) so that the direction
364                  * is not being tested on each round of the loop.
365                  */
366                 if (first > last) {
367                         /*
368                          * counting down
369                          */
370                         count = first - last;
371
372                         do {
373                                 if (count-- < 0) {      /* completely used? */
374                                         inp->inp_laddr.s_addr = INADDR_ANY;
375                                         return (EADDRNOTAVAIL);
376                                 }
377                                 --*lastport;
378                                 if (*lastport > first || *lastport < last)
379                                         *lastport = first;
380                                 lport = htons(*lastport);
381                         } while (in_pcblookup_local(pcbinfo, inp->inp_laddr,
382                                  lport, wild, cred));
383                 } else {
384                         /*
385                          * counting up
386                          */
387                         count = last - first;
388
389                         do {
390                                 if (count-- < 0) {      /* completely used? */
391                                         inp->inp_laddr.s_addr = INADDR_ANY;
392                                         return (EADDRNOTAVAIL);
393                                 }
394                                 ++*lastport;
395                                 if (*lastport < first || *lastport > last)
396                                         *lastport = first;
397                                 lport = htons(*lastport);
398                         } while (in_pcblookup_local(pcbinfo, inp->inp_laddr,
399                                  lport, wild, cred));
400                 }
401         }
402         inp->inp_lport = lport;
403
404         jsin.sin_family = AF_INET;
405         jsin.sin_addr.s_addr = inp->inp_laddr.s_addr;
406         if (!prison_replace_wildcards(td, (struct sockaddr*)&jsin)) {
407                 inp->inp_laddr.s_addr = INADDR_ANY;
408                 inp->inp_lport = 0;
409                 return (EINVAL);
410         }
411         inp->inp_laddr.s_addr = jsin.sin_addr.s_addr;
412
413         if (in_pcbinsporthash(inp) != 0) {
414                 inp->inp_laddr.s_addr = INADDR_ANY;
415                 inp->inp_lport = 0;
416                 return (EAGAIN);
417         }
418         return (0);
419 }
420
421 /*
422  *   Transform old in_pcbconnect() into an inner subroutine for new
423  *   in_pcbconnect(): Do some validity-checking on the remote
424  *   address (in mbuf 'nam') and then determine local host address
425  *   (i.e., which interface) to use to access that remote host.
426  *
427  *   This preserves definition of in_pcbconnect(), while supporting a
428  *   slightly different version for T/TCP.  (This is more than
429  *   a bit of a kludge, but cleaning up the internal interfaces would
430  *   have forced minor changes in every protocol).
431  */
432 int
433 in_pcbladdr(struct inpcb *inp, struct sockaddr *nam,
434         struct sockaddr_in **plocal_sin, struct thread *td)
435 {
436         struct in_ifaddr *ia;
437         struct ucred *cred = NULL;
438         struct sockaddr_in *sin = (struct sockaddr_in *)nam;
439         struct sockaddr *jsin;
440         int jailed = 0, alloc_route = 0;
441
442         if (nam->sa_len != sizeof *sin)
443                 return (EINVAL);
444         if (sin->sin_family != AF_INET)
445                 return (EAFNOSUPPORT);
446         if (sin->sin_port == 0)
447                 return (EADDRNOTAVAIL);
448         if (td && td->td_proc && td->td_proc->p_ucred)
449                 cred = td->td_proc->p_ucred;
450         if (cred && cred->cr_prison)
451                 jailed = 1;
452         if (!TAILQ_EMPTY(&in_ifaddrheads[mycpuid])) {
453                 ia = TAILQ_FIRST(&in_ifaddrheads[mycpuid])->ia;
454                 /*
455                  * If the destination address is INADDR_ANY,
456                  * use the primary local address.
457                  * If the supplied address is INADDR_BROADCAST,
458                  * and the primary interface supports broadcast,
459                  * choose the broadcast address for that interface.
460                  */
461                 if (sin->sin_addr.s_addr == INADDR_ANY)
462                         sin->sin_addr = IA_SIN(ia)->sin_addr;
463                 else if (sin->sin_addr.s_addr == (u_long)INADDR_BROADCAST &&
464                     (ia->ia_ifp->if_flags & IFF_BROADCAST))
465                         sin->sin_addr = satosin(&ia->ia_broadaddr)->sin_addr;
466         }
467         if (inp->inp_laddr.s_addr == INADDR_ANY) {
468                 struct route *ro;
469
470                 ia = NULL;
471                 /*
472                  * If route is known or can be allocated now,
473                  * our src addr is taken from the i/f, else punt.
474                  * Note that we should check the address family of the cached
475                  * destination, in case of sharing the cache with IPv6.
476                  */
477                 ro = &inp->inp_route;
478                 if (ro->ro_rt &&
479                     (!(ro->ro_rt->rt_flags & RTF_UP) ||
480                      ro->ro_dst.sa_family != AF_INET ||
481                      satosin(&ro->ro_dst)->sin_addr.s_addr !=
482                                       sin->sin_addr.s_addr ||
483                      inp->inp_socket->so_options & SO_DONTROUTE)) {
484                         RTFREE(ro->ro_rt);
485                         ro->ro_rt = NULL;
486                 }
487                 if (!(inp->inp_socket->so_options & SO_DONTROUTE) && /*XXX*/
488                     (ro->ro_rt == NULL ||
489                     ro->ro_rt->rt_ifp == NULL)) {
490                         /* No route yet, so try to acquire one */
491                         bzero(&ro->ro_dst, sizeof(struct sockaddr_in));
492                         ro->ro_dst.sa_family = AF_INET;
493                         ro->ro_dst.sa_len = sizeof(struct sockaddr_in);
494                         ((struct sockaddr_in *) &ro->ro_dst)->sin_addr =
495                                 sin->sin_addr;
496                         rtalloc(ro);
497                         alloc_route = 1;
498                 }
499                 /*
500                  * If we found a route, use the address
501                  * corresponding to the outgoing interface
502                  * unless it is the loopback (in case a route
503                  * to our address on another net goes to loopback).
504                  */
505                 if (ro->ro_rt && !(ro->ro_rt->rt_ifp->if_flags & IFF_LOOPBACK)) {
506                         if (jailed) {
507                                 if (jailed_ip(cred->cr_prison, 
508                                     ro->ro_rt->rt_ifa->ifa_addr)) {
509                                         ia = ifatoia(ro->ro_rt->rt_ifa);
510                                 }
511                         } else {
512                                 ia = ifatoia(ro->ro_rt->rt_ifa);
513                         }
514                 }
515                 if (ia == NULL) {
516                         u_short fport = sin->sin_port;
517
518                         sin->sin_port = 0;
519                         ia = ifatoia(ifa_ifwithdstaddr(sintosa(sin)));
520                         if (ia && jailed && !jailed_ip(cred->cr_prison,
521                             sintosa(&ia->ia_addr)))
522                                 ia = NULL;
523                         if (ia == NULL)
524                                 ia = ifatoia(ifa_ifwithnet(sintosa(sin)));
525                         if (ia && jailed && !jailed_ip(cred->cr_prison,
526                             sintosa(&ia->ia_addr)))
527                                 ia = NULL;
528                         sin->sin_port = fport;
529                         if (ia == NULL &&
530                             !TAILQ_EMPTY(&in_ifaddrheads[mycpuid]))
531                                 ia = TAILQ_FIRST(&in_ifaddrheads[mycpuid])->ia;
532                         if (ia && jailed && !jailed_ip(cred->cr_prison,
533                             sintosa(&ia->ia_addr)))
534                                 ia = NULL;
535
536                         if (!jailed && ia == NULL)
537                                 goto fail;
538                 }
539                 /*
540                  * If the destination address is multicast and an outgoing
541                  * interface has been set as a multicast option, use the
542                  * address of that interface as our source address.
543                  */
544                 if (!jailed && IN_MULTICAST(ntohl(sin->sin_addr.s_addr)) &&
545                     inp->inp_moptions != NULL) {
546                         struct ip_moptions *imo;
547                         struct ifnet *ifp;
548
549                         imo = inp->inp_moptions;
550                         if (imo->imo_multicast_ifp != NULL) {
551                                 struct in_ifaddr_container *iac;
552
553                                 ifp = imo->imo_multicast_ifp;
554                                 ia = NULL;
555                                 TAILQ_FOREACH(iac,
556                                 &in_ifaddrheads[mycpuid], ia_link) {
557                                         if (iac->ia->ia_ifp == ifp) {
558                                                 ia = iac->ia;
559                                                 break;
560                                         }
561                                 }
562                                 if (ia == NULL)
563                                         goto fail;
564                         }
565                 }
566                 /*
567                  * Don't do pcblookup call here; return interface in plocal_sin
568                  * and exit to caller, that will do the lookup.
569                  */
570                 if (ia == NULL && jailed) {
571                         if ((jsin = prison_get_nonlocal(cred->cr_prison, AF_INET, NULL)) != NULL ||
572                             (jsin = prison_get_local(cred->cr_prison, AF_INET, NULL)) != NULL) {
573                                 *plocal_sin = satosin(jsin);
574                         } else {
575                                 /* IPv6 only Jail */
576                                 goto fail;
577                         }
578                 } else {
579                         *plocal_sin = &ia->ia_addr;
580                 }
581         }
582         return (0);
583 fail:
584         if (alloc_route) {
585                 struct route *ro = &inp->inp_route;
586
587                 if (ro->ro_rt != NULL)
588                         RTFREE(ro->ro_rt);
589                 bzero(ro, sizeof(*ro));
590         }
591         return (EADDRNOTAVAIL);
592 }
593
594 /*
595  * Outer subroutine:
596  * Connect from a socket to a specified address.
597  * Both address and port must be specified in argument sin.
598  * If don't have a local address for this socket yet,
599  * then pick one.
600  */
601 int
602 in_pcbconnect(struct inpcb *inp, struct sockaddr *nam, struct thread *td)
603 {
604         struct sockaddr_in *if_sin;
605         struct sockaddr_in *sin = (struct sockaddr_in *)nam;
606         int error;
607
608         /* Call inner routine to assign local interface address. */
609         if ((error = in_pcbladdr(inp, nam, &if_sin, td)) != 0)
610                 return (error);
611
612         if (in_pcblookup_hash(inp->inp_cpcbinfo, sin->sin_addr, sin->sin_port,
613             inp->inp_laddr.s_addr ? inp->inp_laddr : if_sin->sin_addr,
614             inp->inp_lport, FALSE, NULL) != NULL) {
615                 return (EADDRINUSE);
616         }
617         if (inp->inp_laddr.s_addr == INADDR_ANY) {
618                 if (inp->inp_lport == 0) {
619                         error = in_pcbbind(inp, NULL, td);
620                         if (error)
621                                 return (error);
622                 }
623                 inp->inp_laddr = if_sin->sin_addr;
624         }
625         inp->inp_faddr = sin->sin_addr;
626         inp->inp_fport = sin->sin_port;
627         in_pcbinsconnhash(inp);
628         return (0);
629 }
630
631 void
632 in_pcbdisconnect(struct inpcb *inp)
633 {
634
635         inp->inp_faddr.s_addr = INADDR_ANY;
636         inp->inp_fport = 0;
637         in_pcbremconnhash(inp);
638         if (inp->inp_socket->so_state & SS_NOFDREF)
639                 in_pcbdetach(inp);
640 }
641
642 void
643 in_pcbdetach(struct inpcb *inp)
644 {
645         struct socket *so = inp->inp_socket;
646         struct inpcbinfo *ipi = inp->inp_pcbinfo;
647
648 #ifdef IPSEC
649         ipsec4_delete_pcbpolicy(inp);
650 #endif /*IPSEC*/
651         inp->inp_gencnt = ++ipi->ipi_gencnt;
652         in_pcbremlists(inp);
653         so->so_pcb = NULL;
654         sofree(so);
655         if (inp->inp_options)
656                 m_free(inp->inp_options);
657         if (inp->inp_route.ro_rt)
658                 rtfree(inp->inp_route.ro_rt);
659         ip_freemoptions(inp->inp_moptions);
660         inp->inp_vflag = 0;
661         kfree(inp, M_PCB);
662 }
663
664 /*
665  * The calling convention of in_setsockaddr() and in_setpeeraddr() was
666  * modified to match the pru_sockaddr() and pru_peeraddr() entry points
667  * in struct pr_usrreqs, so that protocols can just reference then directly
668  * without the need for a wrapper function.  The socket must have a valid
669  * (i.e., non-nil) PCB, but it should be impossible to get an invalid one
670  * except through a kernel programming error, so it is acceptable to panic
671  * (or in this case trap) if the PCB is invalid.  (Actually, we don't trap
672  * because there actually /is/ a programming error somewhere... XXX)
673  */
674 int
675 in_setsockaddr(struct socket *so, struct sockaddr **nam)
676 {
677         struct inpcb *inp;
678         struct sockaddr_in *sin;
679
680         /*
681          * Do the malloc first in case it blocks.
682          */
683         MALLOC(sin, struct sockaddr_in *, sizeof *sin, M_SONAME,
684                 M_WAITOK | M_ZERO);
685         sin->sin_family = AF_INET;
686         sin->sin_len = sizeof *sin;
687
688         crit_enter();
689         inp = so->so_pcb;
690         if (!inp) {
691                 crit_exit();
692                 kfree(sin, M_SONAME);
693                 return (ECONNRESET);
694         }
695         sin->sin_port = inp->inp_lport;
696         sin->sin_addr = inp->inp_laddr;
697         crit_exit();
698
699         *nam = (struct sockaddr *)sin;
700         return (0);
701 }
702
703 int
704 in_setpeeraddr(struct socket *so, struct sockaddr **nam)
705 {
706         struct inpcb *inp;
707         struct sockaddr_in *sin;
708
709         /*
710          * Do the malloc first in case it blocks.
711          */
712         MALLOC(sin, struct sockaddr_in *, sizeof *sin, M_SONAME,
713                 M_WAITOK | M_ZERO);
714         sin->sin_family = AF_INET;
715         sin->sin_len = sizeof *sin;
716
717         crit_enter();
718         inp = so->so_pcb;
719         if (!inp) {
720                 crit_exit();
721                 kfree(sin, M_SONAME);
722                 return (ECONNRESET);
723         }
724         sin->sin_port = inp->inp_fport;
725         sin->sin_addr = inp->inp_faddr;
726         crit_exit();
727
728         *nam = (struct sockaddr *)sin;
729         return (0);
730 }
731
732 void
733 in_pcbnotifyall(struct inpcbhead *head, struct in_addr faddr, int err,
734                 void (*notify)(struct inpcb *, int))
735 {
736         struct inpcb *inp, *ninp;
737
738         /*
739          * note: if INP_PLACEMARKER is set we must ignore the rest of
740          * the structure and skip it.
741          */
742         crit_enter();
743         LIST_FOREACH_MUTABLE(inp, head, inp_list, ninp) {
744                 if (inp->inp_flags & INP_PLACEMARKER)
745                         continue;
746 #ifdef INET6
747                 if (!(inp->inp_vflag & INP_IPV4))
748                         continue;
749 #endif
750                 if (inp->inp_faddr.s_addr != faddr.s_addr ||
751                     inp->inp_socket == NULL)
752                         continue;
753                 (*notify)(inp, err);            /* can remove inp from list! */
754         }
755         crit_exit();
756 }
757
758 void
759 in_pcbpurgeif0(struct inpcb *head, struct ifnet *ifp)
760 {
761         struct inpcb *inp;
762         struct ip_moptions *imo;
763         int i, gap;
764
765         for (inp = head; inp != NULL; inp = LIST_NEXT(inp, inp_list)) {
766                 if (inp->inp_flags & INP_PLACEMARKER)
767                         continue;
768                 imo = inp->inp_moptions;
769                 if ((inp->inp_vflag & INP_IPV4) && imo != NULL) {
770                         /*
771                          * Unselect the outgoing interface if it is being
772                          * detached.
773                          */
774                         if (imo->imo_multicast_ifp == ifp)
775                                 imo->imo_multicast_ifp = NULL;
776
777                         /*
778                          * Drop multicast group membership if we joined
779                          * through the interface being detached.
780                          */
781                         for (i = 0, gap = 0; i < imo->imo_num_memberships;
782                             i++) {
783                                 if (imo->imo_membership[i]->inm_ifp == ifp) {
784                                         in_delmulti(imo->imo_membership[i]);
785                                         gap++;
786                                 } else if (gap != 0)
787                                         imo->imo_membership[i - gap] =
788                                             imo->imo_membership[i];
789                         }
790                         imo->imo_num_memberships -= gap;
791                 }
792         }
793 }
794
795 /*
796  * Check for alternatives when higher level complains
797  * about service problems.  For now, invalidate cached
798  * routing information.  If the route was created dynamically
799  * (by a redirect), time to try a default gateway again.
800  */
801 void
802 in_losing(struct inpcb *inp)
803 {
804         struct rtentry *rt;
805         struct rt_addrinfo rtinfo;
806
807         if ((rt = inp->inp_route.ro_rt)) {
808                 bzero(&rtinfo, sizeof(struct rt_addrinfo));
809                 rtinfo.rti_info[RTAX_DST] = rt_key(rt);
810                 rtinfo.rti_info[RTAX_GATEWAY] = rt->rt_gateway;
811                 rtinfo.rti_info[RTAX_NETMASK] = rt_mask(rt);
812                 rtinfo.rti_flags = rt->rt_flags;
813                 rt_missmsg(RTM_LOSING, &rtinfo, rt->rt_flags, 0);
814                 if (rt->rt_flags & RTF_DYNAMIC)
815                         rtrequest1_global(RTM_DELETE, &rtinfo, NULL, NULL);
816                 inp->inp_route.ro_rt = NULL;
817                 rtfree(rt);
818                 /*
819                  * A new route can be allocated
820                  * the next time output is attempted.
821                  */
822         }
823 }
824
825 /*
826  * After a routing change, flush old routing
827  * and allocate a (hopefully) better one.
828  */
829 void
830 in_rtchange(struct inpcb *inp, int err)
831 {
832         if (inp->inp_route.ro_rt) {
833                 rtfree(inp->inp_route.ro_rt);
834                 inp->inp_route.ro_rt = NULL;
835                 /*
836                  * A new route can be allocated the next time
837                  * output is attempted.
838                  */
839         }
840 }
841
842 /*
843  * Lookup a PCB based on the local address and port.
844  */
845 struct inpcb *
846 in_pcblookup_local(struct inpcbinfo *pcbinfo, struct in_addr laddr,
847                    u_int lport_arg, int wild_okay, struct ucred *cred)
848 {
849         struct inpcb *inp;
850         int matchwild = 3, wildcard;
851         u_short lport = lport_arg;
852
853         struct inpcbporthead *porthash;
854         struct inpcbport *phd;
855         struct inpcb *match = NULL;
856
857         /*
858          * Best fit PCB lookup.
859          *
860          * First see if this local port is in use by looking on the
861          * port hash list.
862          */
863         porthash = &pcbinfo->porthashbase[INP_PCBPORTHASH(lport,
864             pcbinfo->porthashmask)];
865         LIST_FOREACH(phd, porthash, phd_hash) {
866                 if (phd->phd_port == lport)
867                         break;
868         }
869         if (phd != NULL) {
870                 /*
871                  * Port is in use by one or more PCBs. Look for best
872                  * fit.
873                  */
874                 LIST_FOREACH(inp, &phd->phd_pcblist, inp_portlist) {
875                         wildcard = 0;
876 #ifdef INET6
877                         if ((inp->inp_vflag & INP_IPV4) == 0)
878                                 continue;
879 #endif
880                         if (inp->inp_faddr.s_addr != INADDR_ANY)
881                                 wildcard++;
882                         if (inp->inp_laddr.s_addr != INADDR_ANY) {
883                                 if (laddr.s_addr == INADDR_ANY)
884                                         wildcard++;
885                                 else if (inp->inp_laddr.s_addr != laddr.s_addr)
886                                         continue;
887                         } else {
888                                 if (laddr.s_addr != INADDR_ANY)
889                                         wildcard++;
890                         }
891                         if (wildcard && !wild_okay)
892                                 continue;
893                         if (wildcard < matchwild &&
894                             (cred == NULL ||
895                              cred->cr_prison == 
896                                         inp->inp_socket->so_cred->cr_prison)) {
897                                 match = inp;
898                                 matchwild = wildcard;
899                                 if (matchwild == 0) {
900                                         break;
901                                 }
902                         }
903                 }
904         }
905         return (match);
906 }
907
908 /*
909  * Lookup PCB in hash list.
910  */
911 struct inpcb *
912 in_pcblookup_hash(struct inpcbinfo *pcbinfo, struct in_addr faddr, u_int fport_arg,
913                   struct in_addr laddr, u_int lport_arg, boolean_t wildcard,
914                   struct ifnet *ifp)
915 {
916         struct inpcbhead *head;
917         struct inpcb *inp, *jinp=NULL;
918         u_short fport = fport_arg, lport = lport_arg;
919
920         /*
921          * First look for an exact match.
922          */
923         head = &pcbinfo->hashbase[INP_PCBCONNHASH(faddr.s_addr, fport,
924             laddr.s_addr, lport, pcbinfo->hashmask)];
925         LIST_FOREACH(inp, head, inp_hash) {
926 #ifdef INET6
927                 if (!(inp->inp_vflag & INP_IPV4))
928                         continue;
929 #endif
930                 if (in_hosteq(inp->inp_faddr, faddr) &&
931                     in_hosteq(inp->inp_laddr, laddr) &&
932                     inp->inp_fport == fport && inp->inp_lport == lport) {
933                         /* found */
934                         if (inp->inp_socket == NULL ||
935                             inp->inp_socket->so_cred->cr_prison == NULL) {
936                                 return (inp);
937                         } else {
938                                 if  (jinp == NULL)
939                                         jinp = inp;
940                         }
941                 }
942         }
943         if (jinp != NULL)
944                 return (jinp);
945         if (wildcard) {
946                 struct inpcb *local_wild = NULL;
947                 struct inpcb *jinp_wild = NULL;
948 #ifdef INET6
949                 struct inpcb *local_wild_mapped = NULL;
950 #endif
951                 struct inpcontainer *ic;
952                 struct inpcontainerhead *chead;
953                 struct sockaddr_in jsin;
954                 struct ucred *cred;
955
956                 /*
957                  * Order of socket selection:
958                  * 1. non-jailed, non-wild.
959                  * 2. non-jailed, wild.
960                  * 3. jailed, non-wild.
961                  * 4. jailed, wild.
962                  */
963                 jsin.sin_family = AF_INET;
964                 chead = &pcbinfo->wildcardhashbase[
965                     INP_PCBWILDCARDHASH(lport, pcbinfo->wildcardhashmask)];
966                 LIST_FOREACH(ic, chead, ic_list) {
967                         inp = ic->ic_inp;
968                         jsin.sin_addr.s_addr = laddr.s_addr;
969 #ifdef INET6
970                         if (!(inp->inp_vflag & INP_IPV4))
971                                 continue;
972 #endif
973                         if (inp->inp_socket != NULL)
974                                 cred = inp->inp_socket->so_cred;
975                         else
976                                 cred = NULL;
977                         if (cred != NULL && jailed(cred)) {
978                                 if (jinp != NULL)
979                                         continue;
980                                 else
981                                         if (!jailed_ip(cred->cr_prison,
982                                             (struct sockaddr *)&jsin))
983                                                 continue;
984                         }
985                         if (inp->inp_lport == lport) {
986                                 if (ifp && ifp->if_type == IFT_FAITH &&
987                                     !(inp->inp_flags & INP_FAITH))
988                                         continue;
989                                 if (inp->inp_laddr.s_addr == laddr.s_addr) {
990                                         if (cred != NULL && jailed(cred))
991                                                 jinp = inp;
992                                         else
993                                                 return (inp);
994                                 }
995                                 if (inp->inp_laddr.s_addr == INADDR_ANY) {
996 #ifdef INET6
997                                         if (INP_CHECK_SOCKAF(inp->inp_socket,
998                                                              AF_INET6))
999                                                 local_wild_mapped = inp;
1000                                         else
1001 #endif
1002                                                 if (cred != NULL &&
1003                                                     jailed(cred))
1004                                                         jinp_wild = inp;
1005                                                 else
1006                                                         local_wild = inp;
1007                                 }
1008                         }
1009                 }
1010                 if (local_wild != NULL)
1011                         return (local_wild);
1012 #ifdef INET6
1013                 if (local_wild_mapped != NULL)
1014                         return (local_wild_mapped);
1015 #endif
1016                 if (jinp != NULL)
1017                         return (jinp);
1018                 return (jinp_wild);
1019         }
1020
1021         /*
1022          * Not found.
1023          */
1024         return (NULL);
1025 }
1026
1027 /*
1028  * Insert PCB into connection hash table.
1029  */
1030 void
1031 in_pcbinsconnhash(struct inpcb *inp)
1032 {
1033         struct inpcbinfo *pcbinfo = inp->inp_cpcbinfo;
1034         struct inpcbhead *bucket;
1035         u_int32_t hashkey_faddr, hashkey_laddr;
1036
1037 #ifdef INET6
1038         if (inp->inp_vflag & INP_IPV6) {
1039                 hashkey_faddr = inp->in6p_faddr.s6_addr32[3] /* XXX JH */;
1040                 hashkey_laddr = inp->in6p_laddr.s6_addr32[3] /* XXX JH */;
1041         } else {
1042 #endif
1043                 hashkey_faddr = inp->inp_faddr.s_addr;
1044                 hashkey_laddr = inp->inp_laddr.s_addr;
1045 #ifdef INET6
1046         }
1047 #endif
1048
1049         KASSERT(!(inp->inp_flags & INP_CONNECTED), ("already on hash list"));
1050         inp->inp_flags |= INP_CONNECTED;
1051
1052         /*
1053          * Insert into the connection hash table.
1054          */
1055         bucket = &pcbinfo->hashbase[INP_PCBCONNHASH(hashkey_faddr,
1056             inp->inp_fport, hashkey_laddr, inp->inp_lport, pcbinfo->hashmask)];
1057         LIST_INSERT_HEAD(bucket, inp, inp_hash);
1058 }
1059
1060 /*
1061  * Remove PCB from connection hash table.
1062  */
1063 void
1064 in_pcbremconnhash(struct inpcb *inp)
1065 {
1066         KASSERT(inp->inp_flags & INP_CONNECTED, ("inp not connected"));
1067         LIST_REMOVE(inp, inp_hash);
1068         inp->inp_flags &= ~INP_CONNECTED;
1069 }
1070
1071 /*
1072  * Insert PCB into port hash table.
1073  */
1074 int
1075 in_pcbinsporthash(struct inpcb *inp)
1076 {
1077         struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
1078         struct inpcbporthead *pcbporthash;
1079         struct inpcbport *phd;
1080
1081         /*
1082          * Insert into the port hash table.
1083          */
1084         pcbporthash = &pcbinfo->porthashbase[
1085             INP_PCBPORTHASH(inp->inp_lport, pcbinfo->porthashmask)];
1086
1087         /* Go through port list and look for a head for this lport. */
1088         LIST_FOREACH(phd, pcbporthash, phd_hash)
1089                 if (phd->phd_port == inp->inp_lport)
1090                         break;
1091
1092         /* If none exists, malloc one and tack it on. */
1093         if (phd == NULL) {
1094                 MALLOC(phd, struct inpcbport *, sizeof(struct inpcbport),
1095                     M_PCB, M_INTWAIT | M_NULLOK);
1096                 if (phd == NULL)
1097                         return (ENOBUFS); /* XXX */
1098                 phd->phd_port = inp->inp_lport;
1099                 LIST_INIT(&phd->phd_pcblist);
1100                 LIST_INSERT_HEAD(pcbporthash, phd, phd_hash);
1101         }
1102
1103         inp->inp_phd = phd;
1104         LIST_INSERT_HEAD(&phd->phd_pcblist, inp, inp_portlist);
1105
1106         return (0);
1107 }
1108
1109 void
1110 in_pcbinswildcardhash_oncpu(struct inpcb *inp, struct inpcbinfo *pcbinfo)
1111 {
1112         struct inpcontainer *ic;
1113         struct inpcontainerhead *bucket;
1114
1115         bucket = &pcbinfo->wildcardhashbase[
1116             INP_PCBWILDCARDHASH(inp->inp_lport, pcbinfo->wildcardhashmask)];
1117
1118         ic = kmalloc(sizeof(struct inpcontainer), M_TEMP, M_INTWAIT);
1119         ic->ic_inp = inp;
1120         LIST_INSERT_HEAD(bucket, ic, ic_list);
1121 }
1122
1123 /*
1124  * Insert PCB into wildcard hash table.
1125  */
1126 void
1127 in_pcbinswildcardhash(struct inpcb *inp)
1128 {
1129         struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
1130         
1131         KKASSERT(pcbinfo != NULL);
1132
1133         in_pcbinswildcardhash_oncpu(inp, pcbinfo);
1134         inp->inp_flags |= INP_WILDCARD;
1135 }
1136
1137 void
1138 in_pcbremwildcardhash_oncpu(struct inpcb *inp, struct inpcbinfo *pcbinfo)
1139 {
1140         struct inpcontainer *ic;
1141         struct inpcontainerhead *head;
1142
1143         /* find bucket */
1144         head = &pcbinfo->wildcardhashbase[
1145             INP_PCBWILDCARDHASH(inp->inp_lport, pcbinfo->wildcardhashmask)];
1146
1147         LIST_FOREACH(ic, head, ic_list) {
1148                 if (ic->ic_inp == inp)
1149                         goto found;
1150         }
1151         return;                 /* not found! */
1152
1153 found:
1154         LIST_REMOVE(ic, ic_list);       /* remove container from bucket chain */
1155         kfree(ic, M_TEMP);              /* deallocate container */
1156 }
1157
1158 /*
1159  * Remove PCB from wildcard hash table.
1160  */
1161 void
1162 in_pcbremwildcardhash(struct inpcb *inp)
1163 {
1164         struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
1165
1166         KASSERT(inp->inp_flags & INP_WILDCARD, ("inp not wildcard"));
1167         in_pcbremwildcardhash_oncpu(inp, pcbinfo);
1168         inp->inp_flags &= ~INP_WILDCARD;
1169 }
1170
1171 /*
1172  * Remove PCB from various lists.
1173  */
1174 void
1175 in_pcbremlists(struct inpcb *inp)
1176 {
1177         if (inp->inp_lport) {
1178                 struct inpcbport *phd = inp->inp_phd;
1179
1180                 LIST_REMOVE(inp, inp_portlist);
1181                 if (LIST_FIRST(&phd->phd_pcblist) == NULL) {
1182                         LIST_REMOVE(phd, phd_hash);
1183                         kfree(phd, M_PCB);
1184                 }
1185         }
1186         if (inp->inp_flags & INP_WILDCARD) {
1187                 in_pcbremwildcardhash(inp);
1188         } else if (inp->inp_flags & INP_CONNECTED) {
1189                 in_pcbremconnhash(inp);
1190         }
1191         LIST_REMOVE(inp, inp_list);
1192         inp->inp_pcbinfo->ipi_count--;
1193 }
1194
1195 int
1196 prison_xinpcb(struct thread *td, struct inpcb *inp)
1197 {
1198         struct ucred *cr;
1199
1200         if (td->td_proc == NULL)
1201                 return (0);
1202         cr = td->td_proc->p_ucred;
1203         if (cr->cr_prison == NULL)
1204                 return (0);
1205         if (inp->inp_socket && inp->inp_socket->so_cred &&
1206             inp->inp_socket->so_cred->cr_prison &&
1207             cr->cr_prison == inp->inp_socket->so_cred->cr_prison)
1208                 return (0);
1209         return (1);
1210 }
1211
1212 int
1213 in_pcblist_global(SYSCTL_HANDLER_ARGS)
1214 {
1215         struct inpcbinfo *pcbinfo = arg1;
1216         struct inpcb *inp, *marker;
1217         struct xinpcb xi;
1218         int error, i, n;
1219         inp_gen_t gencnt;
1220
1221         /*
1222          * The process of preparing the TCB list is too time-consuming and
1223          * resource-intensive to repeat twice on every request.
1224          */
1225         if (req->oldptr == NULL) {
1226                 n = pcbinfo->ipi_count;
1227                 req->oldidx = (n + n/8 + 10) * sizeof(struct xinpcb);
1228                 return 0;
1229         }
1230
1231         if (req->newptr != NULL)
1232                 return EPERM;
1233
1234         /*
1235          * OK, now we're committed to doing something.  Re-fetch ipi_count
1236          * after obtaining the generation count.
1237          */
1238         gencnt = pcbinfo->ipi_gencnt;
1239         n = pcbinfo->ipi_count;
1240
1241         marker = kmalloc(sizeof(struct inpcb), M_TEMP, M_WAITOK|M_ZERO);
1242         marker->inp_flags |= INP_PLACEMARKER;
1243         LIST_INSERT_HEAD(&pcbinfo->pcblisthead, marker, inp_list);
1244
1245         i = 0;
1246         error = 0;
1247
1248         while ((inp = LIST_NEXT(marker, inp_list)) != NULL && i < n) {
1249                 LIST_REMOVE(marker, inp_list);
1250                 LIST_INSERT_AFTER(inp, marker, inp_list);
1251
1252                 if (inp->inp_flags & INP_PLACEMARKER)
1253                         continue;
1254                 if (inp->inp_gencnt > gencnt)
1255                         continue;
1256                 if (prison_xinpcb(req->td, inp))
1257                         continue;
1258                 bzero(&xi, sizeof xi);
1259                 xi.xi_len = sizeof xi;
1260                 bcopy(inp, &xi.xi_inp, sizeof *inp);
1261                 if (inp->inp_socket)
1262                         sotoxsocket(inp->inp_socket, &xi.xi_socket);
1263                 if ((error = SYSCTL_OUT(req, &xi, sizeof xi)) != 0)
1264                         break;
1265                 ++i;
1266         }
1267         LIST_REMOVE(marker, inp_list);
1268         if (error == 0 && i < n) {
1269                 bzero(&xi, sizeof xi);
1270                 xi.xi_len = sizeof xi;
1271                 while (i < n) {
1272                         error = SYSCTL_OUT(req, &xi, sizeof xi);
1273                         ++i;
1274                 }
1275         }
1276         kfree(marker, M_TEMP);
1277         return(error);
1278 }