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 <vm/vm_zone.h>
  92
  93 #include <net/if.h>
  94 #include <net/if_types.h>
  95 #include <net/route.h>
  96
  97 #include <netinet/in.h>
  98 #include <netinet/in_pcb.h>
  99 #include <netinet/in_var.h>
 100 #include <netinet/ip_var.h>
 101 #ifdef INET6
 102 #include <netinet/ip6.h>
 103 #include <netinet6/ip6_var.h>
 104 #endif /* INET6 */
 105
 106 #ifdef IPSEC
 107 #include <netinet6/ipsec.h>
 108 #include <netproto/key/key.h>
 109 #endif
 110
 111 #ifdef FAST_IPSEC
 112 #if defined(IPSEC) || defined(IPSEC_ESP)
 113 #error "Bad idea: don't compile with both IPSEC and FAST_IPSEC!"
 114 #endif
 115
 116 #include <netproto/ipsec/ipsec.h>
 117 #include <netproto/ipsec/key.h>
 118 #define IPSEC
 119 #endif /* FAST_IPSEC */
 120
 121 struct in_addr zeroin_addr;
 122
 123 /*
 124  * These configure the range of local port addresses assigned to
 125  * "unspecified" outgoing connections/packets/whatever.
 126  */
 127 int ipport_lowfirstauto = IPPORT_RESERVED - 1;  /* 1023 */
 128 int ipport_lowlastauto = IPPORT_RESERVEDSTART;  /* 600 */
 129
 130 int ipport_firstauto = IPPORT_RESERVED;         /* 1024 */
 131 int ipport_lastauto = IPPORT_USERRESERVED;      /* 5000 */
 132
 133 int ipport_hifirstauto = IPPORT_HIFIRSTAUTO;    /* 49152 */
 134 int ipport_hilastauto = IPPORT_HILASTAUTO;      /* 65535 */
 135
 136 static __inline void
 137 RANGECHK(int var, int min, int max)
 138 {
 139         if (var < min)
 140                 var = min;
 141         else if (var > max)
 142                 var = max;
 143 }
 144
 145 static int
 146 sysctl_net_ipport_check(SYSCTL_HANDLER_ARGS)
 147 {
 148         int error;
 149
 150         error = sysctl_handle_int(oidp, oidp->oid_arg1, oidp->oid_arg2, req);
 151         if (!error) {
 152                 RANGECHK(ipport_lowfirstauto, 1, IPPORT_RESERVED - 1);
 153                 RANGECHK(ipport_lowlastauto, 1, IPPORT_RESERVED - 1);
 154
 155                 RANGECHK(ipport_firstauto, IPPORT_RESERVED, USHRT_MAX);
 156                 RANGECHK(ipport_lastauto, IPPORT_RESERVED, USHRT_MAX);
 157
 158                 RANGECHK(ipport_hifirstauto, IPPORT_RESERVED, USHRT_MAX);
 159                 RANGECHK(ipport_hilastauto, IPPORT_RESERVED, USHRT_MAX);
 160         }
 161         return (error);
 162 }
 163
 164 SYSCTL_NODE(_net_inet_ip, IPPROTO_IP, portrange, CTLFLAG_RW, 0, "IP Ports");
 165
 166 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, lowfirst, CTLTYPE_INT|CTLFLAG_RW,
 167            &ipport_lowfirstauto, 0, &sysctl_net_ipport_check, "I", "");
 168 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, lowlast, CTLTYPE_INT|CTLFLAG_RW,
 169            &ipport_lowlastauto, 0, &sysctl_net_ipport_check, "I", "");
 170 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, first, CTLTYPE_INT|CTLFLAG_RW,
 171            &ipport_firstauto, 0, &sysctl_net_ipport_check, "I", "");
 172 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, last, CTLTYPE_INT|CTLFLAG_RW,
 173            &ipport_lastauto, 0, &sysctl_net_ipport_check, "I", "");
 174 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, hifirst, CTLTYPE_INT|CTLFLAG_RW,
 175            &ipport_hifirstauto, 0, &sysctl_net_ipport_check, "I", "");
 176 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, hilast, CTLTYPE_INT|CTLFLAG_RW,
 177            &ipport_hilastauto, 0, &sysctl_net_ipport_check, "I", "");
 178
 179 /*
 180  * in_pcb.c: manage the Protocol Control Blocks.
 181  *
 182  * NOTE: It is assumed that most of these functions will be called from
 183  * a critical section.  XXX - There are, unfortunately, a few exceptions
 184  * to this rule that should be fixed.
 185  *
 186  * NOTE: The caller should initialize the cpu field to the cpu running the
 187  * protocol stack associated with this inpcbinfo.
 188  */
 189
 190 void
 191 in_pcbinfo_init(struct inpcbinfo *pcbinfo)
 192 {
 193         LIST_INIT(&pcbinfo->pcblisthead);
 194         pcbinfo->cpu = -1;
 195 }
 196
 197 /*
 198  * Allocate a PCB and associate it with the socket.
 199  */
 200 int
 201 in_pcballoc(struct socket *so, struct inpcbinfo *pcbinfo)
 202 {
 203         struct inpcb *inp;
 204 #ifdef IPSEC
 205         int error;
 206 #endif
 207
 208         inp = zalloc(pcbinfo->ipi_zone);
 209         if (inp == NULL)
 210                 return (ENOBUFS);
 211         bzero(inp, sizeof *inp);
 212         inp->inp_gencnt = ++pcbinfo->ipi_gencnt;
 213         inp->inp_pcbinfo = inp->inp_cpcbinfo = pcbinfo;
 214         inp->inp_socket = so;
 215 #ifdef IPSEC
 216         error = ipsec_init_policy(so, &inp->inp_sp);
 217         if (error != 0) {
 218                 zfree(pcbinfo->ipi_zone, inp);
 219                 return (error);
 220         }
 221 #endif
 222 #ifdef INET6
 223         if (INP_SOCKAF(so) == AF_INET6 && ip6_v6only)
 224                 inp->inp_flags |= IN6P_IPV6_V6ONLY;
 225         if (ip6_auto_flowlabel)
 226                 inp->inp_flags |= IN6P_AUTOFLOWLABEL;
 227 #endif
 228         so->so_pcb = inp;
 229         LIST_INSERT_HEAD(&pcbinfo->pcblisthead, inp, inp_list);
 230         pcbinfo->ipi_count++;
 231         return (0);
 232 }
 233
 234 int
 235 in_pcbbind(struct inpcb *inp, struct sockaddr *nam, struct thread *td)
 236 {
 237         struct socket *so = inp->inp_socket;
 238         struct proc *p = td->td_proc;
 239         unsigned short *lastport;
 240         struct sockaddr_in *sin;
 241         struct sockaddr_in jsin;
 242         struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
 243         struct ucred *cred = NULL;
 244         u_short lport = 0;
 245         int wild = 0, reuseport = (so->so_options & SO_REUSEPORT);
 246         int error;
 247
 248         KKASSERT(p);
 249
 250         if (TAILQ_EMPTY(&in_ifaddrheads[mycpuid])) /* XXX broken! */
 251                 return (EADDRNOTAVAIL);
 252         if (inp->inp_lport != 0 || inp->inp_laddr.s_addr != INADDR_ANY)
 253                 return (EINVAL);        /* already bound */
 254         if (!(so->so_options & (SO_REUSEADDR|SO_REUSEPORT)))
 255                 wild = 1;    /* neither SO_REUSEADDR nor SO_REUSEPORT is set */
 256         if (p)
 257                 cred = p->p_ucred;
 258         if (nam != NULL) {
 259                 sin = (struct sockaddr_in *)nam;
 260                 if (nam->sa_len != sizeof *sin)
 261                         return (EINVAL);
 262 #ifdef notdef
 263                 /*
 264                  * We should check the family, but old programs
 265                  * incorrectly fail to initialize it.
 266                  */
 267                 if (sin->sin_family != AF_INET)
 268                         return (EAFNOSUPPORT);
 269 #endif
 270                 if (!prison_replace_wildcards(td, nam))
 271                                 return (EINVAL);
 272                 lport = sin->sin_port;
 273                 if (IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
 274                         /*
 275                          * Treat SO_REUSEADDR as SO_REUSEPORT for multicast;
 276                          * allow complete duplication of binding if
 277                          * SO_REUSEPORT is set, or if SO_REUSEADDR is set
 278                          * and a multicast address is bound on both
 279                          * new and duplicated sockets.
 280                          */
 281                         if (so->so_options & SO_REUSEADDR)
 282                                 reuseport = SO_REUSEADDR | SO_REUSEPORT;
 283                 } else if (sin->sin_addr.s_addr != INADDR_ANY) {
 284                         sin->sin_port = 0;              /* yech... */
 285                         bzero(&sin->sin_zero, sizeof sin->sin_zero);
 286                         if (ifa_ifwithaddr((struct sockaddr *)sin) == NULL)
 287                                 return (EADDRNOTAVAIL);
 288                 }
 289                 if (lport != 0) {
 290                         struct inpcb *t;
 291
 292                         /* GROSS */
 293                         if (ntohs(lport) < IPPORT_RESERVED &&
 294                             cred && priv_check_cred(cred, PRIV_ROOT, PRISON_ROOT))
 295                                 return (EACCES);
 296                         if (so->so_cred->cr_uid != 0 &&
 297                             !IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
 298                                 t = in_pcblookup_local(inp->inp_pcbinfo,
 299                                     sin->sin_addr, lport,
 300                                     INPLOOKUP_WILDCARD, cred);
 301                                 if (t &&
 302                                     (!in_nullhost(sin->sin_addr) ||
 303                                      !in_nullhost(t->inp_laddr) ||
 304                                      (t->inp_socket->so_options &
 305                                          SO_REUSEPORT) == 0) &&
 306                                     (so->so_cred->cr_uid !=
 307                                      t->inp_socket->so_cred->cr_uid)) {
 308 #ifdef INET6
 309                                         if (!in_nullhost(sin->sin_addr) ||
 310                                             !in_nullhost(t->inp_laddr) ||
 311                                             INP_SOCKAF(so) ==
 312                                             INP_SOCKAF(t->inp_socket))
 313 #endif
 314                                         return (EADDRINUSE);
 315                                 }
 316                         }
 317                         if (cred && !prison_replace_wildcards(td, nam))
 318                                 return (EADDRNOTAVAIL);
 319                         t = in_pcblookup_local(pcbinfo, sin->sin_addr, lport,
 320                                                wild, cred);
 321                         if (t && !(reuseport & t->inp_socket->so_options)) {
 322 #ifdef INET6
 323                                 if (!in_nullhost(sin->sin_addr) ||
 324                                     !in_nullhost(t->inp_laddr) ||
 325                                     INP_SOCKAF(so) == INP_SOCKAF(t->inp_socket))
 326 #endif
 327                                 return (EADDRINUSE);
 328                         }
 329                 }
 330                 inp->inp_laddr = sin->sin_addr;
 331         }
 332         if (lport == 0) {
 333                 ushort first, last;
 334                 int count;
 335
 336                 jsin.sin_family = AF_INET;
 337                 jsin.sin_addr.s_addr = inp->inp_laddr.s_addr;
 338                 if (!prison_replace_wildcards(td, (struct sockaddr *)&jsin)) {
 339                         inp->inp_laddr.s_addr = INADDR_ANY;
 340                         return (EINVAL);
 341                 }
 342                 inp->inp_laddr.s_addr = jsin.sin_addr.s_addr;
 343
 344                 inp->inp_flags |= INP_ANONPORT;
 345
 346                 if (inp->inp_flags & INP_HIGHPORT) {
 347                         first = ipport_hifirstauto;     /* sysctl */
 348                         last  = ipport_hilastauto;
 349                         lastport = &pcbinfo->lasthi;
 350                 } else if (inp->inp_flags & INP_LOWPORT) {
 351                         if (cred &&
 352                             (error = priv_check_cred(cred, PRIV_ROOT, PRISON_ROOT))) {
 353                                 inp->inp_laddr.s_addr = INADDR_ANY;
 354                                 return (error);
 355                         }
 356                         first = ipport_lowfirstauto;    /* 1023 */
 357                         last  = ipport_lowlastauto;     /* 600 */
 358                         lastport = &pcbinfo->lastlow;
 359                 } else {
 360                         first = ipport_firstauto;       /* sysctl */
 361                         last  = ipport_lastauto;
 362                         lastport = &pcbinfo->lastport;
 363                 }
 364                 /*
 365                  * Simple check to ensure all ports are not used up causing
 366                  * a deadlock here.
 367                  *
 368                  * We split the two cases (up and down) so that the direction
 369                  * is not being tested on each round of the loop.
 370                  */
 371                 if (first > last) {
 372                         /*
 373                          * counting down
 374                          */
 375                         count = first - last;
 376
 377                         do {
 378                                 if (count-- < 0) {      /* completely used? */
 379                                         inp->inp_laddr.s_addr = INADDR_ANY;
 380                                         return (EADDRNOTAVAIL);
 381                                 }
 382                                 --*lastport;
 383                                 if (*lastport > first || *lastport < last)
 384                                         *lastport = first;
 385                                 lport = htons(*lastport);
 386                         } while (in_pcblookup_local(pcbinfo, inp->inp_laddr,
 387                                  lport, wild, cred));
 388                 } else {
 389                         /*
 390                          * counting up
 391                          */
 392                         count = last - first;
 393
 394                         do {
 395                                 if (count-- < 0) {      /* completely used? */
 396                                         inp->inp_laddr.s_addr = INADDR_ANY;
 397                                         return (EADDRNOTAVAIL);
 398                                 }
 399                                 ++*lastport;
 400                                 if (*lastport < first || *lastport > last)
 401                                         *lastport = first;
 402                                 lport = htons(*lastport);
 403                         } while (in_pcblookup_local(pcbinfo, inp->inp_laddr,
 404                                  lport, wild, cred));
 405                 }
 406         }
 407         inp->inp_lport = lport;
 408
 409         jsin.sin_family = AF_INET;
 410         jsin.sin_addr.s_addr = inp->inp_laddr.s_addr;
 411         if (!prison_replace_wildcards(td, (struct sockaddr*)&jsin)) {
 412                 inp->inp_laddr.s_addr = INADDR_ANY;
 413                 inp->inp_lport = 0;
 414                 return (EINVAL);
 415         }
 416         inp->inp_laddr.s_addr = jsin.sin_addr.s_addr;
 417
 418         if (in_pcbinsporthash(inp) != 0) {
 419                 inp->inp_laddr.s_addr = INADDR_ANY;
 420                 inp->inp_lport = 0;
 421                 return (EAGAIN);
 422         }
 423         return (0);
 424 }
 425
 426 /*
 427  *   Transform old in_pcbconnect() into an inner subroutine for new
 428  *   in_pcbconnect(): Do some validity-checking on the remote
 429  *   address (in mbuf 'nam') and then determine local host address
 430  *   (i.e., which interface) to use to access that remote host.
 431  *
 432  *   This preserves definition of in_pcbconnect(), while supporting a
 433  *   slightly different version for T/TCP.  (This is more than
 434  *   a bit of a kludge, but cleaning up the internal interfaces would
 435  *   have forced minor changes in every protocol).
 436  */
 437 int
 438 in_pcbladdr(struct inpcb *inp, struct sockaddr *nam,
 439         struct sockaddr_in **plocal_sin, struct thread *td)
 440 {
 441         struct in_ifaddr *ia;
 442         struct ucred *cred = NULL;
 443         struct sockaddr_in *sin = (struct sockaddr_in *)nam;
 444         struct sockaddr *jsin;
 445         int jailed = 0, alloc_route = 0;
 446
 447         if (nam->sa_len != sizeof *sin)
 448                 return (EINVAL);
 449         if (sin->sin_family != AF_INET)
 450                 return (EAFNOSUPPORT);
 451         if (sin->sin_port == 0)
 452                 return (EADDRNOTAVAIL);
 453         if (td && td->td_proc && td->td_proc->p_ucred)
 454                 cred = td->td_proc->p_ucred;
 455         if (cred && cred->cr_prison)
 456                 jailed = 1;
 457         if (!TAILQ_EMPTY(&in_ifaddrheads[mycpuid])) {
 458                 ia = TAILQ_FIRST(&in_ifaddrheads[mycpuid])->ia;
 459                 /*
 460                  * If the destination address is INADDR_ANY,
 461                  * use the primary local address.
 462                  * If the supplied address is INADDR_BROADCAST,
 463                  * and the primary interface supports broadcast,
 464                  * choose the broadcast address for that interface.
 465                  */
 466                 if (sin->sin_addr.s_addr == INADDR_ANY)
 467                         sin->sin_addr = IA_SIN(ia)->sin_addr;
 468                 else if (sin->sin_addr.s_addr == (u_long)INADDR_BROADCAST &&
 469                     (ia->ia_ifp->if_flags & IFF_BROADCAST))
 470                         sin->sin_addr = satosin(&ia->ia_broadaddr)->sin_addr;
 471         }
 472         if (inp->inp_laddr.s_addr == INADDR_ANY) {
 473                 struct route *ro;
 474
 475                 ia = (struct in_ifaddr *)NULL;
 476                 /*
 477                  * If route is known or can be allocated now,
 478                  * our src addr is taken from the i/f, else punt.
 479                  * Note that we should check the address family of the cached
 480                  * destination, in case of sharing the cache with IPv6.
 481                  */
 482                 ro = &inp->inp_route;
 483                 if (ro->ro_rt &&
 484                     (!(ro->ro_rt->rt_flags & RTF_UP) ||
 485                      ro->ro_dst.sa_family != AF_INET ||
 486                      satosin(&ro->ro_dst)->sin_addr.s_addr !=
 487                                       sin->sin_addr.s_addr ||
 488                      inp->inp_socket->so_options & SO_DONTROUTE)) {
 489                         RTFREE(ro->ro_rt);
 490                         ro->ro_rt = (struct rtentry *)NULL;
 491                 }
 492                 if (!(inp->inp_socket->so_options & SO_DONTROUTE) && /*XXX*/
 493                     (ro->ro_rt == (struct rtentry *)NULL ||
 494                     ro->ro_rt->rt_ifp == (struct ifnet *)NULL)) {
 495                         /* No route yet, so try to acquire one */
 496                         bzero(&ro->ro_dst, sizeof(struct sockaddr_in));
 497                         ro->ro_dst.sa_family = AF_INET;
 498                         ro->ro_dst.sa_len = sizeof(struct sockaddr_in);
 499                         ((struct sockaddr_in *) &ro->ro_dst)->sin_addr =
 500                                 sin->sin_addr;
 501                         rtalloc(ro);
 502                         alloc_route = 1;
 503                 }
 504                 /*
 505                  * If we found a route, use the address
 506                  * corresponding to the outgoing interface
 507                  * unless it is the loopback (in case a route
 508                  * to our address on another net goes to loopback).
 509                  */
 510                 if (ro->ro_rt && !(ro->ro_rt->rt_ifp->if_flags & IFF_LOOPBACK)) {
 511                         if (jailed) {
 512                                 if (jailed_ip(cred->cr_prison,
 513                                     ro->ro_rt->rt_ifa->ifa_addr)) {
 514                                         ia = ifatoia(ro->ro_rt->rt_ifa);
 515                                 }
 516                         } else {
 517                                 ia = ifatoia(ro->ro_rt->rt_ifa);
 518                         }
 519                 }
 520                 if (ia == NULL) {
 521                         u_short fport = sin->sin_port;
 522
 523                         sin->sin_port = 0;
 524                         ia = ifatoia(ifa_ifwithdstaddr(sintosa(sin)));
 525                         if (ia && jailed && !jailed_ip(cred->cr_prison,
 526                             sintosa(&ia->ia_addr)))
 527                                 ia = NULL;
 528                         if (ia == NULL)
 529                                 ia = ifatoia(ifa_ifwithnet(sintosa(sin)));
 530                         if (ia && jailed && !jailed_ip(cred->cr_prison,
 531                             sintosa(&ia->ia_addr)))
 532                                 ia = NULL;
 533                         sin->sin_port = fport;
 534                         if (ia == NULL &&
 535                             !TAILQ_EMPTY(&in_ifaddrheads[mycpuid]))
 536                                 ia = TAILQ_FIRST(&in_ifaddrheads[mycpuid])->ia;
 537                         if (ia && jailed && !jailed_ip(cred->cr_prison,
 538                             sintosa(&ia->ia_addr)))
 539                                 ia = NULL;
 540
 541                         if (!jailed && ia == NULL)
 542                                 goto fail;
 543                 }
 544                 /*
 545                  * If the destination address is multicast and an outgoing
 546                  * interface has been set as a multicast option, use the
 547                  * address of that interface as our source address.
 548                  */
 549                 if (!jailed && IN_MULTICAST(ntohl(sin->sin_addr.s_addr)) &&
 550                     inp->inp_moptions != NULL) {
 551                         struct ip_moptions *imo;
 552                         struct ifnet *ifp;
 553
 554                         imo = inp->inp_moptions;
 555                         if (imo->imo_multicast_ifp != NULL) {
 556                                 struct in_ifaddr_container *iac;
 557
 558                                 ifp = imo->imo_multicast_ifp;
 559                                 ia = NULL;
 560                                 TAILQ_FOREACH(iac,
 561                                 &in_ifaddrheads[mycpuid], ia_link) {
 562                                         if (iac->ia->ia_ifp == ifp) {
 563                                                 ia = iac->ia;
 564                                                 break;
 565                                         }
 566                                 }
 567                                 if (ia == NULL)
 568                                         goto fail;
 569                         }
 570                 }
 571                 /*
 572                  * Don't do pcblookup call here; return interface in plocal_sin
 573                  * and exit to caller, that will do the lookup.
 574                  */
 575                 if (ia == NULL && jailed) {
 576                         if ((jsin = prison_get_nonlocal(cred->cr_prison, AF_INET, NULL)) != NULL ||
 577                             (jsin = prison_get_local(cred->cr_prison, AF_INET, NULL)) != NULL) {
 578                                 *plocal_sin = satosin(jsin);
 579                         } else {
 580                                 /* IPv6 only Jail */
 581                                 goto fail;
 582                         }
 583                 } else {
 584                         *plocal_sin = &ia->ia_addr;
 585                 }
 586         }
 587         return (0);
 588 fail:
 589         if (alloc_route) {
 590                 struct route *ro = &inp->inp_route;
 591
 592                 if (ro->ro_rt != NULL)
 593                         RTFREE(ro->ro_rt);
 594                 bzero(ro, sizeof(*ro));
 595         }
 596         return (EADDRNOTAVAIL);
 597 }
 598
 599 /*
 600  * Outer subroutine:
 601  * Connect from a socket to a specified address.
 602  * Both address and port must be specified in argument sin.
 603  * If don't have a local address for this socket yet,
 604  * then pick one.
 605  */
 606 int
 607 in_pcbconnect(struct inpcb *inp, struct sockaddr *nam, struct thread *td)
 608 {
 609         struct sockaddr_in *if_sin;
 610         struct sockaddr_in *sin = (struct sockaddr_in *)nam;
 611         int error;
 612
 613         /* Call inner routine to assign local interface address. */
 614         if ((error = in_pcbladdr(inp, nam, &if_sin, td)) != 0)
 615                 return (error);
 616
 617         if (in_pcblookup_hash(inp->inp_cpcbinfo, sin->sin_addr, sin->sin_port,
 618             inp->inp_laddr.s_addr ? inp->inp_laddr : if_sin->sin_addr,
 619             inp->inp_lport, FALSE, NULL) != NULL) {
 620                 return (EADDRINUSE);
 621         }
 622         if (inp->inp_laddr.s_addr == INADDR_ANY) {
 623                 if (inp->inp_lport == 0) {
 624                         error = in_pcbbind(inp, (struct sockaddr *)NULL, td);
 625                         if (error)
 626                                 return (error);
 627                 }
 628                 inp->inp_laddr = if_sin->sin_addr;
 629         }
 630         inp->inp_faddr = sin->sin_addr;
 631         inp->inp_fport = sin->sin_port;
 632         in_pcbinsconnhash(inp);
 633         return (0);
 634 }
 635
 636 void
 637 in_pcbdisconnect(struct inpcb *inp)
 638 {
 639
 640         inp->inp_faddr.s_addr = INADDR_ANY;
 641         inp->inp_fport = 0;
 642         in_pcbremconnhash(inp);
 643         if (inp->inp_socket->so_state & SS_NOFDREF)
 644                 in_pcbdetach(inp);
 645 }
 646
 647 void
 648 in_pcbdetach(struct inpcb *inp)
 649 {
 650         struct socket *so = inp->inp_socket;
 651         struct inpcbinfo *ipi = inp->inp_pcbinfo;
 652
 653 #ifdef IPSEC
 654         ipsec4_delete_pcbpolicy(inp);
 655 #endif /*IPSEC*/
 656         inp->inp_gencnt = ++ipi->ipi_gencnt;
 657         in_pcbremlists(inp);
 658         so->so_pcb = 0;
 659         sofree(so);
 660         if (inp->inp_options)
 661                 m_free(inp->inp_options);
 662         if (inp->inp_route.ro_rt)
 663                 rtfree(inp->inp_route.ro_rt);
 664         ip_freemoptions(inp->inp_moptions);
 665         inp->inp_vflag = 0;
 666         zfree(ipi->ipi_zone, inp);
 667 }
 668
 669 /*
 670  * The calling convention of in_setsockaddr() and in_setpeeraddr() was
 671  * modified to match the pru_sockaddr() and pru_peeraddr() entry points
 672  * in struct pr_usrreqs, so that protocols can just reference then directly
 673  * without the need for a wrapper function.  The socket must have a valid
 674  * (i.e., non-nil) PCB, but it should be impossible to get an invalid one
 675  * except through a kernel programming error, so it is acceptable to panic
 676  * (or in this case trap) if the PCB is invalid.  (Actually, we don't trap
 677  * because there actually /is/ a programming error somewhere... XXX)
 678  */
 679 int
 680 in_setsockaddr(struct socket *so, struct sockaddr **nam)
 681 {
 682         struct inpcb *inp;
 683         struct sockaddr_in *sin;
 684
 685         /*
 686          * Do the malloc first in case it blocks.
 687          */
 688         MALLOC(sin, struct sockaddr_in *, sizeof *sin, M_SONAME,
 689                 M_WAITOK | M_ZERO);
 690         sin->sin_family = AF_INET;
 691         sin->sin_len = sizeof *sin;
 692
 693         crit_enter();
 694         inp = so->so_pcb;
 695         if (!inp) {
 696                 crit_exit();
 697                 kfree(sin, M_SONAME);
 698                 return (ECONNRESET);
 699         }
 700         sin->sin_port = inp->inp_lport;
 701         sin->sin_addr = inp->inp_laddr;
 702         crit_exit();
 703
 704         *nam = (struct sockaddr *)sin;
 705         return (0);
 706 }
 707
 708 int
 709 in_setpeeraddr(struct socket *so, struct sockaddr **nam)
 710 {
 711         struct inpcb *inp;
 712         struct sockaddr_in *sin;
 713
 714         /*
 715          * Do the malloc first in case it blocks.
 716          */
 717         MALLOC(sin, struct sockaddr_in *, sizeof *sin, M_SONAME,
 718                 M_WAITOK | M_ZERO);
 719         sin->sin_family = AF_INET;
 720         sin->sin_len = sizeof *sin;
 721
 722         crit_enter();
 723         inp = so->so_pcb;
 724         if (!inp) {
 725                 crit_exit();
 726                 kfree(sin, M_SONAME);
 727                 return (ECONNRESET);
 728         }
 729         sin->sin_port = inp->inp_fport;
 730         sin->sin_addr = inp->inp_faddr;
 731         crit_exit();
 732
 733         *nam = (struct sockaddr *)sin;
 734         return (0);
 735 }
 736
 737 void
 738 in_pcbnotifyall(struct inpcbhead *head, struct in_addr faddr, int err,
 739                 void (*notify)(struct inpcb *, int))
 740 {
 741         struct inpcb *inp, *ninp;
 742
 743         /*
 744          * note: if INP_PLACEMARKER is set we must ignore the rest of
 745          * the structure and skip it.
 746          */
 747         crit_enter();
 748         LIST_FOREACH_MUTABLE(inp, head, inp_list, ninp) {
 749                 if (inp->inp_flags & INP_PLACEMARKER)
 750                         continue;
 751 #ifdef INET6
 752                 if (!(inp->inp_vflag & INP_IPV4))
 753                         continue;
 754 #endif
 755                 if (inp->inp_faddr.s_addr != faddr.s_addr ||
 756                     inp->inp_socket == NULL)
 757                         continue;
 758                 (*notify)(inp, err);            /* can remove inp from list! */
 759         }
 760         crit_exit();
 761 }
 762
 763 void
 764 in_pcbpurgeif0(struct inpcb *head, struct ifnet *ifp)
 765 {
 766         struct inpcb *inp;
 767         struct ip_moptions *imo;
 768         int i, gap;
 769
 770         for (inp = head; inp != NULL; inp = LIST_NEXT(inp, inp_list)) {
 771                 if (inp->inp_flags & INP_PLACEMARKER)
 772                         continue;
 773                 imo = inp->inp_moptions;
 774                 if ((inp->inp_vflag & INP_IPV4) && imo != NULL) {
 775                         /*
 776                          * Unselect the outgoing interface if it is being
 777                          * detached.
 778                          */
 779                         if (imo->imo_multicast_ifp == ifp)
 780                                 imo->imo_multicast_ifp = NULL;
 781
 782                         /*
 783                          * Drop multicast group membership if we joined
 784                          * through the interface being detached.
 785                          */
 786                         for (i = 0, gap = 0; i < imo->imo_num_memberships;
 787                             i++) {
 788                                 if (imo->imo_membership[i]->inm_ifp == ifp) {
 789                                         in_delmulti(imo->imo_membership[i]);
 790                                         gap++;
 791                                 } else if (gap != 0)
 792                                         imo->imo_membership[i - gap] =
 793                                             imo->imo_membership[i];
 794                         }
 795                         imo->imo_num_memberships -= gap;
 796                 }
 797         }
 798 }
 799
 800 /*
 801  * Check for alternatives when higher level complains
 802  * about service problems.  For now, invalidate cached
 803  * routing information.  If the route was created dynamically
 804  * (by a redirect), time to try a default gateway again.
 805  */
 806 void
 807 in_losing(struct inpcb *inp)
 808 {
 809         struct rtentry *rt;
 810         struct rt_addrinfo rtinfo;
 811
 812         if ((rt = inp->inp_route.ro_rt)) {
 813                 bzero(&rtinfo, sizeof(struct rt_addrinfo));
 814                 rtinfo.rti_info[RTAX_DST] = rt_key(rt);
 815                 rtinfo.rti_info[RTAX_GATEWAY] = rt->rt_gateway;
 816                 rtinfo.rti_info[RTAX_NETMASK] = rt_mask(rt);
 817                 rtinfo.rti_flags = rt->rt_flags;
 818                 rt_missmsg(RTM_LOSING, &rtinfo, rt->rt_flags, 0);
 819                 if (rt->rt_flags & RTF_DYNAMIC)
 820                         rtrequest1_global(RTM_DELETE, &rtinfo, NULL, NULL);
 821                 inp->inp_route.ro_rt = NULL;
 822                 rtfree(rt);
 823                 /*
 824                  * A new route can be allocated
 825                  * the next time output is attempted.
 826                  */
 827         }
 828 }
 829
 830 /*
 831  * After a routing change, flush old routing
 832  * and allocate a (hopefully) better one.
 833  */
 834 void
 835 in_rtchange(struct inpcb *inp, int err)
 836 {
 837         if (inp->inp_route.ro_rt) {
 838                 rtfree(inp->inp_route.ro_rt);
 839                 inp->inp_route.ro_rt = NULL;
 840                 /*
 841                  * A new route can be allocated the next time
 842                  * output is attempted.
 843                  */
 844         }
 845 }
 846
 847 /*
 848  * Lookup a PCB based on the local address and port.
 849  */
 850 struct inpcb *
 851 in_pcblookup_local(struct inpcbinfo *pcbinfo, struct in_addr laddr,
 852                    u_int lport_arg, int wild_okay, struct ucred *cred)
 853 {
 854         struct inpcb *inp;
 855         int matchwild = 3, wildcard;
 856         u_short lport = lport_arg;
 857
 858         struct inpcbporthead *porthash;
 859         struct inpcbport *phd;
 860         struct inpcb *match = NULL;
 861
 862         /*
 863          * Best fit PCB lookup.
 864          *
 865          * First see if this local port is in use by looking on the
 866          * port hash list.
 867          */
 868         porthash = &pcbinfo->porthashbase[INP_PCBPORTHASH(lport,
 869             pcbinfo->porthashmask)];
 870         LIST_FOREACH(phd, porthash, phd_hash) {
 871                 if (phd->phd_port == lport)
 872                         break;
 873         }
 874         if (phd != NULL) {
 875                 /*
 876                  * Port is in use by one or more PCBs. Look for best
 877                  * fit.
 878                  */
 879                 LIST_FOREACH(inp, &phd->phd_pcblist, inp_portlist) {
 880                         wildcard = 0;
 881 #ifdef INET6
 882                         if ((inp->inp_vflag & INP_IPV4) == 0)
 883                                 continue;
 884 #endif
 885                         if (inp->inp_faddr.s_addr != INADDR_ANY)
 886                                 wildcard++;
 887                         if (inp->inp_laddr.s_addr != INADDR_ANY) {
 888                                 if (laddr.s_addr == INADDR_ANY)
 889                                         wildcard++;
 890                                 else if (inp->inp_laddr.s_addr != laddr.s_addr)
 891                                         continue;
 892                         } else {
 893                                 if (laddr.s_addr != INADDR_ANY)
 894                                         wildcard++;
 895                         }
 896                         if (wildcard && !wild_okay)
 897                                 continue;
 898                         if (wildcard < matchwild &&
 899                             (cred == NULL ||
 900                              cred->cr_prison ==
 901                                         inp->inp_socket->so_cred->cr_prison)) {
 902                                 match = inp;
 903                                 matchwild = wildcard;
 904                                 if (matchwild == 0) {
 905                                         break;
 906                                 }
 907                         }
 908                 }
 909         }
 910         return (match);
 911 }
 912
 913 /*
 914  * Lookup PCB in hash list.
 915  */
 916 struct inpcb *
 917 in_pcblookup_hash(struct inpcbinfo *pcbinfo, struct in_addr faddr, u_int fport_arg,
 918                   struct in_addr laddr, u_int lport_arg, boolean_t wildcard,
 919                   struct ifnet *ifp)
 920 {
 921         struct inpcbhead *head;
 922         struct inpcb *inp, *jinp=NULL;
 923         u_short fport = fport_arg, lport = lport_arg;
 924
 925         /*
 926          * First look for an exact match.
 927          */
 928         head = &pcbinfo->hashbase[INP_PCBCONNHASH(faddr.s_addr, fport,
 929             laddr.s_addr, lport, pcbinfo->hashmask)];
 930         LIST_FOREACH(inp, head, inp_hash) {
 931 #ifdef INET6
 932                 if (!(inp->inp_vflag & INP_IPV4))
 933                         continue;
 934 #endif
 935                 if (in_hosteq(inp->inp_faddr, faddr) &&
 936                     in_hosteq(inp->inp_laddr, laddr) &&
 937                     inp->inp_fport == fport && inp->inp_lport == lport) {
 938                         /* found */
 939                         if (inp->inp_socket == NULL ||
 940                             inp->inp_socket->so_cred->cr_prison == NULL) {
 941                                 return (inp);
 942                         } else {
 943                                 if  (jinp == NULL)
 944                                         jinp = inp;
 945                         }
 946                 }
 947         }
 948         if (jinp != NULL)
 949                 return (jinp);
 950         if (wildcard) {
 951                 struct inpcb *local_wild = NULL;
 952                 struct inpcb *jinp_wild = NULL;
 953 #ifdef INET6
 954                 struct inpcb *local_wild_mapped = NULL;
 955 #endif
 956                 struct inpcontainer *ic;
 957                 struct inpcontainerhead *chead;
 958                 struct sockaddr_in jsin;
 959                 struct ucred *cred;
 960
 961                 /*
 962                  * Order of socket selection:
 963                  * 1. non-jailed, non-wild.
 964                  * 2. non-jailed, wild.
 965                  * 3. jailed, non-wild.
 966                  * 4. jailed, wild.
 967                  */
 968                 jsin.sin_family = AF_INET;
 969                 chead = &pcbinfo->wildcardhashbase[
 970                     INP_PCBWILDCARDHASH(lport, pcbinfo->wildcardhashmask)];
 971                 LIST_FOREACH(ic, chead, ic_list) {
 972                         inp = ic->ic_inp;
 973                         jsin.sin_addr.s_addr = laddr.s_addr;
 974 #ifdef INET6
 975                         if (!(inp->inp_vflag & INP_IPV4))
 976                                 continue;
 977 #endif
 978                         if (inp->inp_socket != NULL)
 979                                 cred = inp->inp_socket->so_cred;
 980                         else
 981                                 cred = NULL;
 982                         if (cred != NULL && jailed(cred)) {
 983                                 if (jinp != NULL)
 984                                         continue;
 985                                 else
 986                                         if (!jailed_ip(cred->cr_prison,
 987                                             (struct sockaddr *)&jsin))
 988                                                 continue;
 989                         }
 990                         if (inp->inp_lport == lport) {
 991                                 if (ifp && ifp->if_type == IFT_FAITH &&
 992                                     !(inp->inp_flags & INP_FAITH))
 993                                         continue;
 994                                 if (inp->inp_laddr.s_addr == laddr.s_addr) {
 995                                         if (cred != NULL && jailed(cred))
 996                                                 jinp = inp;
 997                                         else
 998                                                 return (inp);
 999                                 }
1000                                 if (inp->inp_laddr.s_addr == INADDR_ANY) {
1001 #ifdef INET6
1002                                         if (INP_CHECK_SOCKAF(inp->inp_socket,
1003                                                              AF_INET6))
1004                                                 local_wild_mapped = inp;
1005                                         else
1006 #endif
1007                                                 if (cred != NULL &&
1008                                                     jailed(cred))
1009                                                         jinp_wild = inp;
1010                                                 else
1011                                                         local_wild = inp;
1012                                 }
1013                         }
1014                 }
1015                 if (local_wild != NULL)
1016                         return (local_wild);
1017 #ifdef INET6
1018                 if (local_wild_mapped != NULL)
1019                         return (local_wild_mapped);
1020 #endif
1021                 if (jinp != NULL)
1022                         return (jinp);
1023                 return (jinp_wild);
1024         }
1025
1026         /*
1027          * Not found.
1028          */
1029         return (NULL);
1030 }
1031
1032 /*
1033  * Insert PCB into connection hash table.
1034  */
1035 void
1036 in_pcbinsconnhash(struct inpcb *inp)
1037 {
1038         struct inpcbinfo *pcbinfo = inp->inp_cpcbinfo;
1039         struct inpcbhead *bucket;
1040         u_int32_t hashkey_faddr, hashkey_laddr;
1041
1042 #ifdef INET6
1043         if (inp->inp_vflag & INP_IPV6) {
1044                 hashkey_faddr = inp->in6p_faddr.s6_addr32[3] /* XXX JH */;
1045                 hashkey_laddr = inp->in6p_laddr.s6_addr32[3] /* XXX JH */;
1046         } else {
1047 #endif
1048                 hashkey_faddr = inp->inp_faddr.s_addr;
1049                 hashkey_laddr = inp->inp_laddr.s_addr;
1050 #ifdef INET6
1051         }
1052 #endif
1053
1054         KASSERT(!(inp->inp_flags & INP_CONNECTED), ("already on hash list"));
1055         inp->inp_flags |= INP_CONNECTED;
1056
1057         /*
1058          * Insert into the connection hash table.
1059          */
1060         bucket = &pcbinfo->hashbase[INP_PCBCONNHASH(hashkey_faddr,
1061             inp->inp_fport, hashkey_laddr, inp->inp_lport, pcbinfo->hashmask)];
1062         LIST_INSERT_HEAD(bucket, inp, inp_hash);
1063 }
1064
1065 /*
1066  * Remove PCB from connection hash table.
1067  */
1068 void
1069 in_pcbremconnhash(struct inpcb *inp)
1070 {
1071         KASSERT(inp->inp_flags & INP_CONNECTED, ("inp not connected"));
1072         LIST_REMOVE(inp, inp_hash);
1073         inp->inp_flags &= ~INP_CONNECTED;
1074 }
1075
1076 /*
1077  * Insert PCB into port hash table.
1078  */
1079 int
1080 in_pcbinsporthash(struct inpcb *inp)
1081 {
1082         struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
1083         struct inpcbporthead *pcbporthash;
1084         struct inpcbport *phd;
1085
1086         /*
1087          * Insert into the port hash table.
1088          */
1089         pcbporthash = &pcbinfo->porthashbase[
1090             INP_PCBPORTHASH(inp->inp_lport, pcbinfo->porthashmask)];
1091
1092         /* Go through port list and look for a head for this lport. */
1093         LIST_FOREACH(phd, pcbporthash, phd_hash)
1094                 if (phd->phd_port == inp->inp_lport)
1095                         break;
1096
1097         /* If none exists, malloc one and tack it on. */
1098         if (phd == NULL) {
1099                 MALLOC(phd, struct inpcbport *, sizeof(struct inpcbport),
1100                     M_PCB, M_INTWAIT | M_NULLOK);
1101                 if (phd == NULL)
1102                         return (ENOBUFS); /* XXX */
1103                 phd->phd_port = inp->inp_lport;
1104                 LIST_INIT(&phd->phd_pcblist);
1105                 LIST_INSERT_HEAD(pcbporthash, phd, phd_hash);
1106         }
1107
1108         inp->inp_phd = phd;
1109         LIST_INSERT_HEAD(&phd->phd_pcblist, inp, inp_portlist);
1110
1111         return (0);
1112 }
1113
1114 void
1115 in_pcbinswildcardhash_oncpu(struct inpcb *inp, struct inpcbinfo *pcbinfo)
1116 {
1117         struct inpcontainer *ic;
1118         struct inpcontainerhead *bucket;
1119
1120         bucket = &pcbinfo->wildcardhashbase[
1121             INP_PCBWILDCARDHASH(inp->inp_lport, pcbinfo->wildcardhashmask)];
1122
1123         ic = kmalloc(sizeof(struct inpcontainer), M_TEMP, M_INTWAIT);
1124         ic->ic_inp = inp;
1125         LIST_INSERT_HEAD(bucket, ic, ic_list);
1126 }
1127
1128 /*
1129  * Insert PCB into wildcard hash table.
1130  */
1131 void
1132 in_pcbinswildcardhash(struct inpcb *inp)
1133 {
1134         struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
1135
1136         KKASSERT(pcbinfo != NULL);
1137
1138         in_pcbinswildcardhash_oncpu(inp, pcbinfo);
1139         inp->inp_flags |= INP_WILDCARD;
1140 }
1141
1142 void
1143 in_pcbremwildcardhash_oncpu(struct inpcb *inp, struct inpcbinfo *pcbinfo)
1144 {
1145         struct inpcontainer *ic;
1146         struct inpcontainerhead *head;
1147
1148         /* find bucket */
1149         head = &pcbinfo->wildcardhashbase[
1150             INP_PCBWILDCARDHASH(inp->inp_lport, pcbinfo->wildcardhashmask)];
1151
1152         LIST_FOREACH(ic, head, ic_list) {
1153                 if (ic->ic_inp == inp)
1154                         goto found;
1155         }
1156         return;                 /* not found! */
1157
1158 found:
1159         LIST_REMOVE(ic, ic_list);       /* remove container from bucket chain */
1160         kfree(ic, M_TEMP);              /* deallocate container */
1161 }
1162
1163 /*
1164  * Remove PCB from wildcard hash table.
1165  */
1166 void
1167 in_pcbremwildcardhash(struct inpcb *inp)
1168 {
1169         struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
1170
1171         KASSERT(inp->inp_flags & INP_WILDCARD, ("inp not wildcard"));
1172         in_pcbremwildcardhash_oncpu(inp, pcbinfo);
1173         inp->inp_flags &= ~INP_WILDCARD;
1174 }
1175
1176 /*
1177  * Remove PCB from various lists.
1178  */
1179 void
1180 in_pcbremlists(struct inpcb *inp)
1181 {
1182         if (inp->inp_lport) {
1183                 struct inpcbport *phd = inp->inp_phd;
1184
1185                 LIST_REMOVE(inp, inp_portlist);
1186                 if (LIST_FIRST(&phd->phd_pcblist) == NULL) {
1187                         LIST_REMOVE(phd, phd_hash);
1188                         kfree(phd, M_PCB);
1189                 }
1190         }
1191         if (inp->inp_flags & INP_WILDCARD) {
1192                 in_pcbremwildcardhash(inp);
1193         } else if (inp->inp_flags & INP_CONNECTED) {
1194                 in_pcbremconnhash(inp);
1195         }
1196         LIST_REMOVE(inp, inp_list);
1197         inp->inp_pcbinfo->ipi_count--;
1198 }
1199
1200 int
1201 prison_xinpcb(struct thread *td, struct inpcb *inp)
1202 {
1203         struct ucred *cr;
1204
1205         if (td->td_proc == NULL)
1206                 return (0);
1207         cr = td->td_proc->p_ucred;
1208         if (cr->cr_prison == NULL)
1209                 return (0);
1210         if (inp->inp_socket && inp->inp_socket->so_cred &&
1211             inp->inp_socket->so_cred->cr_prison &&
1212             cr->cr_prison == inp->inp_socket->so_cred->cr_prison)
1213                 return (0);
1214         return (1);
1215 }
1216
1217 int
1218 in_pcblist_global(SYSCTL_HANDLER_ARGS)
1219 {
1220         struct inpcbinfo *pcbinfo = arg1;
1221         struct inpcb *inp, *marker;
1222         struct xinpcb xi;
1223         int error, i, n;
1224         inp_gen_t gencnt;
1225
1226         /*
1227          * The process of preparing the TCB list is too time-consuming and
1228          * resource-intensive to repeat twice on every request.
1229          */
1230         if (req->oldptr == NULL) {
1231                 n = pcbinfo->ipi_count;
1232                 req->oldidx = (n + n/8 + 10) * sizeof(struct xinpcb);
1233                 return 0;
1234         }
1235
1236         if (req->newptr != NULL)
1237                 return EPERM;
1238
1239         /*
1240          * OK, now we're committed to doing something.  Re-fetch ipi_count
1241          * after obtaining the generation count.
1242          */
1243         gencnt = pcbinfo->ipi_gencnt;
1244         n = pcbinfo->ipi_count;
1245
1246         marker = kmalloc(sizeof(struct inpcb), M_TEMP, M_WAITOK|M_ZERO);
1247         marker->inp_flags |= INP_PLACEMARKER;
1248         LIST_INSERT_HEAD(&pcbinfo->pcblisthead, marker, inp_list);
1249
1250         i = 0;
1251         error = 0;
1252
1253         while ((inp = LIST_NEXT(marker, inp_list)) != NULL && i < n) {
1254                 LIST_REMOVE(marker, inp_list);
1255                 LIST_INSERT_AFTER(inp, marker, inp_list);
1256
1257                 if (inp->inp_flags & INP_PLACEMARKER)
1258                         continue;
1259                 if (inp->inp_gencnt > gencnt)
1260                         continue;
1261                 if (prison_xinpcb(req->td, inp))
1262                         continue;
1263                 bzero(&xi, sizeof xi);
1264                 xi.xi_len = sizeof xi;
1265                 bcopy(inp, &xi.xi_inp, sizeof *inp);
1266                 if (inp->inp_socket)
1267                         sotoxsocket(inp->inp_socket, &xi.xi_socket);
1268                 if ((error = SYSCTL_OUT(req, &xi, sizeof xi)) != 0)
1269                         break;
1270                 ++i;
1271         }
1272         LIST_REMOVE(marker, inp_list);
1273         if (error == 0 && i < n) {
1274                 bzero(&xi, sizeof xi);
1275                 xi.xi_len = sizeof xi;
1276                 while (i < n) {
1277                         error = SYSCTL_OUT(req, &xi, sizeof xi);
1278                         ++i;
1279                 }
1280         }
1281         kfree(marker, M_TEMP);
1282         return(error);
1283 }