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) 2004 Jeffrey M. Hsu.  All rights reserved.
  36  *
  37  * License terms: all terms for the DragonFly license above plus the following:
  38  *
  39  * 4. All advertising materials mentioning features or use of this software
  40  *    must display the following acknowledgement:
  41  *
  42  *      This product includes software developed by Jeffrey M. Hsu
  43  *      for the DragonFly Project.
  44  *
  45  *    This requirement may be waived with permission from Jeffrey Hsu.
  46  *    This requirement will sunset and may be removed on July 8 2005,
  47  *    after which the standard DragonFly license (as shown above) will
  48  *    apply.
  49  */
  50
  51 /*
  52  * Copyright (c) 1982, 1986, 1991, 1993, 1995
  53  *      The Regents of the University of California.  All rights reserved.
  54  *
  55  * Redistribution and use in source and binary forms, with or without
  56  * modification, are permitted provided that the following conditions
  57  * are met:
  58  * 1. Redistributions of source code must retain the above copyright
  59  *    notice, this list of conditions and the following disclaimer.
  60  * 2. Redistributions in binary form must reproduce the above copyright
  61  *    notice, this list of conditions and the following disclaimer in the
  62  *    documentation and/or other materials provided with the distribution.
  63  * 3. All advertising materials mentioning features or use of this software
  64  *    must display the following acknowledgement:
  65  *      This product includes software developed by the University of
  66  *      California, Berkeley and its contributors.
  67  * 4. Neither the name of the University nor the names of its contributors
  68  *    may be used to endorse or promote products derived from this software
  69  *    without specific prior written permission.
  70  *
  71  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  72  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  73  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  74  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  75  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  76  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  77  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  78  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  79  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  80  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  81  * SUCH DAMAGE.
  82  *
  83  *      @(#)in_pcb.c    8.4 (Berkeley) 5/24/95
  84  * $FreeBSD: src/sys/netinet/in_pcb.c,v 1.59.2.27 2004/01/02 04:06:42 ambrisko Exp $
  85  * $DragonFly: src/sys/netinet/in_pcb.c,v 1.25 2004/08/11 02:36:22 dillon Exp $
  86  */
  87
  88 #include "opt_ipsec.h"
  89 #include "opt_inet6.h"
  90
  91 #include <sys/param.h>
  92 #include <sys/systm.h>
  93 #include <sys/malloc.h>
  94 #include <sys/mbuf.h>
  95 #include <sys/domain.h>
  96 #include <sys/protosw.h>
  97 #include <sys/socket.h>
  98 #include <sys/socketvar.h>
  99 #include <sys/proc.h>
 100 #include <sys/jail.h>
 101 #include <sys/kernel.h>
 102 #include <sys/sysctl.h>
 103
 104 #include <machine/limits.h>
 105
 106 #include <vm/vm_zone.h>
 107
 108 #include <net/if.h>
 109 #include <net/if_types.h>
 110 #include <net/route.h>
 111
 112 #include <netinet/in.h>
 113 #include <netinet/in_pcb.h>
 114 #include <netinet/in_var.h>
 115 #include <netinet/ip_var.h>
 116 #ifdef INET6
 117 #include <netinet/ip6.h>
 118 #include <netinet6/ip6_var.h>
 119 #endif /* INET6 */
 120
 121 #ifdef IPSEC
 122 #include <netinet6/ipsec.h>
 123 #include <netproto/key/key.h>
 124 #endif
 125
 126 #ifdef FAST_IPSEC
 127 #if defined(IPSEC) || defined(IPSEC_ESP)
 128 #error "Bad idea: don't compile with both IPSEC and FAST_IPSEC!"
 129 #endif
 130
 131 #include <netipsec/ipsec.h>
 132 #include <netipsec/key.h>
 133 #define IPSEC
 134 #endif /* FAST_IPSEC */
 135
 136 struct in_addr zeroin_addr;
 137
 138 /*
 139  * These configure the range of local port addresses assigned to
 140  * "unspecified" outgoing connections/packets/whatever.
 141  */
 142 int ipport_lowfirstauto = IPPORT_RESERVED - 1;  /* 1023 */
 143 int ipport_lowlastauto = IPPORT_RESERVEDSTART;  /* 600 */
 144
 145 int ipport_firstauto = IPPORT_RESERVED;         /* 1024 */
 146 int ipport_lastauto = IPPORT_USERRESERVED;      /* 5000 */
 147
 148 int ipport_hifirstauto = IPPORT_HIFIRSTAUTO;    /* 49152 */
 149 int ipport_hilastauto = IPPORT_HILASTAUTO;      /* 65535 */
 150
 151 /* Allocate ephermal source ports in random order. */
 152 int ipport_randomized = 1;
 153
 154 static __inline void
 155 RANGECHK(int var, int min, int max)
 156 {
 157         if (var < min)
 158                 var = min;
 159         else if (var > max)
 160                 var = max;
 161 }
 162
 163 static int
 164 sysctl_net_ipport_check(SYSCTL_HANDLER_ARGS)
 165 {
 166         int error;
 167
 168         error = sysctl_handle_int(oidp, oidp->oid_arg1, oidp->oid_arg2, req);
 169         if (!error) {
 170                 RANGECHK(ipport_lowfirstauto, 1, IPPORT_RESERVED - 1);
 171                 RANGECHK(ipport_lowlastauto, 1, IPPORT_RESERVED - 1);
 172
 173                 RANGECHK(ipport_firstauto, IPPORT_RESERVED, USHRT_MAX);
 174                 RANGECHK(ipport_lastauto, IPPORT_RESERVED, USHRT_MAX);
 175
 176                 RANGECHK(ipport_hifirstauto, IPPORT_RESERVED, USHRT_MAX);
 177                 RANGECHK(ipport_hilastauto, IPPORT_RESERVED, USHRT_MAX);
 178         }
 179         return (error);
 180 }
 181
 182 SYSCTL_NODE(_net_inet_ip, IPPROTO_IP, portrange, CTLFLAG_RW, 0, "IP Ports");
 183
 184 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, lowfirst, CTLTYPE_INT|CTLFLAG_RW,
 185            &ipport_lowfirstauto, 0, &sysctl_net_ipport_check, "I", "");
 186 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, lowlast, CTLTYPE_INT|CTLFLAG_RW,
 187            &ipport_lowlastauto, 0, &sysctl_net_ipport_check, "I", "");
 188 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, first, CTLTYPE_INT|CTLFLAG_RW,
 189            &ipport_firstauto, 0, &sysctl_net_ipport_check, "I", "");
 190 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, last, CTLTYPE_INT|CTLFLAG_RW,
 191            &ipport_lastauto, 0, &sysctl_net_ipport_check, "I", "");
 192 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, hifirst, CTLTYPE_INT|CTLFLAG_RW,
 193            &ipport_hifirstauto, 0, &sysctl_net_ipport_check, "I", "");
 194 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, hilast, CTLTYPE_INT|CTLFLAG_RW,
 195            &ipport_hilastauto, 0, &sysctl_net_ipport_check, "I", "");
 196 SYSCTL_INT(_net_inet_ip_portrange, OID_AUTO, randomized, CTLFLAG_RW,
 197            &ipport_randomized, 0, "");
 198
 199 /*
 200  * in_pcb.c: manage the Protocol Control Blocks.
 201  *
 202  * NOTE: It is assumed that most of these functions will be called at
 203  * splnet(). XXX - There are, unfortunately, a few exceptions to this
 204  * rule that should be fixed.
 205  *
 206  * NOTE: The caller should initialize the cpu field to the cpu running the
 207  * protocol stack associated with this inpcbinfo.
 208  */
 209
 210 void
 211 in_pcbinfo_init(struct inpcbinfo *pcbinfo)
 212 {
 213         LIST_INIT(&pcbinfo->pcblisthead);
 214         pcbinfo->cpu = -1;
 215 }
 216
 217 /*
 218  * Allocate a PCB and associate it with the socket.
 219  */
 220 int
 221 in_pcballoc(struct socket *so, struct inpcbinfo *pcbinfo)
 222 {
 223         struct inpcb *inp;
 224 #ifdef IPSEC
 225         int error;
 226 #endif
 227
 228         inp = zalloc(pcbinfo->ipi_zone);
 229         if (inp == NULL)
 230                 return (ENOBUFS);
 231         bzero((caddr_t)inp, sizeof *inp);
 232         inp->inp_gencnt = ++pcbinfo->ipi_gencnt;
 233         inp->inp_pcbinfo = inp->inp_cpcbinfo = pcbinfo;
 234         inp->inp_socket = so;
 235 #ifdef IPSEC
 236         error = ipsec_init_policy(so, &inp->inp_sp);
 237         if (error != 0) {
 238                 zfree(pcbinfo->ipi_zone, inp);
 239                 return (error);
 240         }
 241 #endif
 242 #ifdef INET6
 243         if (INP_SOCKAF(so) == AF_INET6 && ip6_v6only)
 244                 inp->inp_flags |= IN6P_IPV6_V6ONLY;
 245         if (ip6_auto_flowlabel)
 246                 inp->inp_flags |= IN6P_AUTOFLOWLABEL;
 247 #endif
 248         so->so_pcb = (caddr_t)inp;
 249         LIST_INSERT_HEAD(&pcbinfo->pcblisthead, inp, inp_list);
 250         pcbinfo->ipi_count++;
 251         return (0);
 252 }
 253
 254 int
 255 in_pcbbind(struct inpcb *inp, struct sockaddr *nam, struct thread *td)
 256 {
 257         struct socket *so = inp->inp_socket;
 258         struct proc *p = td->td_proc;
 259         unsigned short *lastport;
 260         struct sockaddr_in *sin;
 261         struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
 262         u_short lport = 0;
 263         int wild = 0, reuseport = (so->so_options & SO_REUSEPORT);
 264         int error, prison = 0;
 265
 266         KKASSERT(p);
 267
 268         if (TAILQ_EMPTY(&in_ifaddrhead)) /* XXX broken! */
 269                 return (EADDRNOTAVAIL);
 270         if (inp->inp_lport != 0 || inp->inp_laddr.s_addr != INADDR_ANY)
 271                 return (EINVAL);        /* already bound */
 272         if (!(so->so_options & (SO_REUSEADDR|SO_REUSEPORT)))
 273                 wild = 1;    /* neither SO_REUSEADDR nor SO_REUSEPORT is set */
 274         if (nam != NULL) {
 275                 sin = (struct sockaddr_in *)nam;
 276                 if (nam->sa_len != sizeof *sin)
 277                         return (EINVAL);
 278 #ifdef notdef
 279                 /*
 280                  * We should check the family, but old programs
 281                  * incorrectly fail to initialize it.
 282                  */
 283                 if (sin->sin_family != AF_INET)
 284                         return (EAFNOSUPPORT);
 285 #endif
 286                 if (sin->sin_addr.s_addr != INADDR_ANY &&
 287                     prison_ip(td, 0, &sin->sin_addr.s_addr))
 288                                 return (EINVAL);
 289                 lport = sin->sin_port;
 290                 if (IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
 291                         /*
 292                          * Treat SO_REUSEADDR as SO_REUSEPORT for multicast;
 293                          * allow complete duplication of binding if
 294                          * SO_REUSEPORT is set, or if SO_REUSEADDR is set
 295                          * and a multicast address is bound on both
 296                          * new and duplicated sockets.
 297                          */
 298                         if (so->so_options & SO_REUSEADDR)
 299                                 reuseport = SO_REUSEADDR | SO_REUSEPORT;
 300                 } else if (sin->sin_addr.s_addr != INADDR_ANY) {
 301                         sin->sin_port = 0;              /* yech... */
 302                         bzero(&sin->sin_zero, sizeof sin->sin_zero);
 303                         if (ifa_ifwithaddr((struct sockaddr *)sin) == NULL)
 304                                 return (EADDRNOTAVAIL);
 305                 }
 306                 if (lport != 0) {
 307                         struct inpcb *t;
 308
 309                         /* GROSS */
 310                         if (ntohs(lport) < IPPORT_RESERVED &&
 311                             p && suser_cred(p->p_ucred, PRISON_ROOT))
 312                                 return (EACCES);
 313                         if (p && p->p_ucred->cr_prison)
 314                                 prison = 1;
 315                         if (so->so_cred->cr_uid != 0 &&
 316                             !IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
 317                                 t = in_pcblookup_local(inp->inp_pcbinfo,
 318                                     sin->sin_addr, lport,
 319                                     prison ? 0 : INPLOOKUP_WILDCARD);
 320                                 if (t &&
 321                                     (!in_nullhost(sin->sin_addr) ||
 322                                      !in_nullhost(t->inp_laddr) ||
 323                                      (t->inp_socket->so_options &
 324                                          SO_REUSEPORT) == 0) &&
 325                                     (so->so_cred->cr_uid !=
 326                                      t->inp_socket->so_cred->cr_uid)) {
 327 #ifdef INET6
 328                                         if (!in_nullhost(sin->sin_addr) ||
 329                                             !in_nullhost(t->inp_laddr) ||
 330                                             INP_SOCKAF(so) ==
 331                                             INP_SOCKAF(t->inp_socket))
 332 #endif
 333                                         return (EADDRINUSE);
 334                                 }
 335                         }
 336                         if (prison && prison_ip(td, 0, &sin->sin_addr.s_addr))
 337                                 return (EADDRNOTAVAIL);
 338                         t = in_pcblookup_local(pcbinfo, sin->sin_addr,
 339                             lport, prison ? 0 : wild);
 340                         if (t && !(reuseport & t->inp_socket->so_options)) {
 341 #ifdef INET6
 342                                 if (!in_nullhost(sin->sin_addr) ||
 343                                     !in_nullhost(t->inp_laddr) ||
 344                                     INP_SOCKAF(so) == INP_SOCKAF(t->inp_socket))
 345 #endif
 346                                 return (EADDRINUSE);
 347                         }
 348                 }
 349                 inp->inp_laddr = sin->sin_addr;
 350         }
 351         if (lport == 0) {
 352                 ushort first, last;
 353                 int count;
 354
 355                 if (inp->inp_laddr.s_addr != INADDR_ANY &&
 356                     prison_ip(td, 0, &inp->inp_laddr.s_addr )) {
 357                         inp->inp_laddr.s_addr = INADDR_ANY;
 358                         return (EINVAL);
 359                 }
 360                 inp->inp_flags |= INP_ANONPORT;
 361
 362                 if (inp->inp_flags & INP_HIGHPORT) {
 363                         first = ipport_hifirstauto;     /* sysctl */
 364                         last  = ipport_hilastauto;
 365                         lastport = &pcbinfo->lasthi;
 366                 } else if (inp->inp_flags & INP_LOWPORT) {
 367                         if (p &&
 368                             (error = suser_cred(p->p_ucred, PRISON_ROOT))) {
 369                                 inp->inp_laddr.s_addr = INADDR_ANY;
 370                                 return (error);
 371                         }
 372                         first = ipport_lowfirstauto;    /* 1023 */
 373                         last  = ipport_lowlastauto;     /* 600 */
 374                         lastport = &pcbinfo->lastlow;
 375                 } else {
 376                         first = ipport_firstauto;       /* sysctl */
 377                         last  = ipport_lastauto;
 378                         lastport = &pcbinfo->lastport;
 379                 }
 380                 /*
 381                  * Simple check to ensure all ports are not used up causing
 382                  * a deadlock here.
 383                  *
 384                  * We split the two cases (up and down) so that the direction
 385                  * is not being tested on each round of the loop.
 386                  */
 387                 if (first > last) {
 388                         /*
 389                          * counting down
 390                          */
 391                         if (ipport_randomized)
 392                                 *lastport = first -
 393                                     (arc4random() % (first - last));
 394                         count = first - last;
 395
 396                         do {
 397                                 if (count-- < 0) {      /* completely used? */
 398                                         inp->inp_laddr.s_addr = INADDR_ANY;
 399                                         return (EADDRNOTAVAIL);
 400                                 }
 401                                 --*lastport;
 402                                 if (*lastport > first || *lastport < last)
 403                                         *lastport = first;
 404                                 lport = htons(*lastport);
 405                         } while (in_pcblookup_local(pcbinfo,
 406                                  inp->inp_laddr, lport, wild));
 407                 } else {
 408                         /*
 409                          * counting up
 410                          */
 411                         if (ipport_randomized)
 412                                 *lastport = first +
 413                                     (arc4random() % (last - first));
 414                         count = last - first;
 415
 416                         do {
 417                                 if (count-- < 0) {      /* completely used? */
 418                                         inp->inp_laddr.s_addr = INADDR_ANY;
 419                                         return (EADDRNOTAVAIL);
 420                                 }
 421                                 ++*lastport;
 422                                 if (*lastport < first || *lastport > last)
 423                                         *lastport = first;
 424                                 lport = htons(*lastport);
 425                         } while (in_pcblookup_local(pcbinfo,
 426                                  inp->inp_laddr, lport, wild));
 427                 }
 428         }
 429         inp->inp_lport = lport;
 430         if (prison_ip(td, 0, &inp->inp_laddr.s_addr)) {
 431                 inp->inp_laddr.s_addr = INADDR_ANY;
 432                 inp->inp_lport = 0;
 433                 return (EINVAL);
 434         }
 435         if (in_pcbinsporthash(inp) != 0) {
 436                 inp->inp_laddr.s_addr = INADDR_ANY;
 437                 inp->inp_lport = 0;
 438                 return (EAGAIN);
 439         }
 440         return (0);
 441 }
 442
 443 /*
 444  *   Transform old in_pcbconnect() into an inner subroutine for new
 445  *   in_pcbconnect(): Do some validity-checking on the remote
 446  *   address (in mbuf 'nam') and then determine local host address
 447  *   (i.e., which interface) to use to access that remote host.
 448  *
 449  *   This preserves definition of in_pcbconnect(), while supporting a
 450  *   slightly different version for T/TCP.  (This is more than
 451  *   a bit of a kludge, but cleaning up the internal interfaces would
 452  *   have forced minor changes in every protocol).
 453  */
 454 int
 455 in_pcbladdr(inp, nam, plocal_sin)
 456         struct inpcb *inp;
 457         struct sockaddr *nam;
 458         struct sockaddr_in **plocal_sin;
 459 {
 460         struct in_ifaddr *ia;
 461         struct sockaddr_in *sin = (struct sockaddr_in *)nam;
 462
 463         if (nam->sa_len != sizeof *sin)
 464                 return (EINVAL);
 465         if (sin->sin_family != AF_INET)
 466                 return (EAFNOSUPPORT);
 467         if (sin->sin_port == 0)
 468                 return (EADDRNOTAVAIL);
 469         if (!TAILQ_EMPTY(&in_ifaddrhead)) {
 470                 ia = TAILQ_FIRST(&in_ifaddrhead);
 471                 /*
 472                  * If the destination address is INADDR_ANY,
 473                  * use the primary local address.
 474                  * If the supplied address is INADDR_BROADCAST,
 475                  * and the primary interface supports broadcast,
 476                  * choose the broadcast address for that interface.
 477                  */
 478                 if (sin->sin_addr.s_addr == INADDR_ANY)
 479                         sin->sin_addr = IA_SIN(ia)->sin_addr;
 480                 else if (sin->sin_addr.s_addr == (u_long)INADDR_BROADCAST &&
 481                     (ia->ia_ifp->if_flags & IFF_BROADCAST))
 482                         sin->sin_addr = satosin(&ia->ia_broadaddr)->sin_addr;
 483         }
 484         if (inp->inp_laddr.s_addr == INADDR_ANY) {
 485                 struct route *ro;
 486
 487                 ia = (struct in_ifaddr *)NULL;
 488                 /*
 489                  * If route is known or can be allocated now,
 490                  * our src addr is taken from the i/f, else punt.
 491                  * Note that we should check the address family of the cached
 492                  * destination, in case of sharing the cache with IPv6.
 493                  */
 494                 ro = &inp->inp_route;
 495                 if (ro->ro_rt &&
 496                     (!(ro->ro_rt->rt_flags & RTF_UP) ||
 497                      ro->ro_dst.sa_family != AF_INET ||
 498                      satosin(&ro->ro_dst)->sin_addr.s_addr !=
 499                          sin->sin_addr.s_addr ||
 500                      inp->inp_socket->so_options & SO_DONTROUTE)) {
 501                         RTFREE(ro->ro_rt);
 502                         ro->ro_rt = (struct rtentry *)NULL;
 503                 }
 504                 if (!(inp->inp_socket->so_options & SO_DONTROUTE) && /*XXX*/
 505                     (ro->ro_rt == (struct rtentry *)NULL ||
 506                     ro->ro_rt->rt_ifp == (struct ifnet *)NULL)) {
 507                         /* No route yet, so try to acquire one */
 508                         bzero(&ro->ro_dst, sizeof(struct sockaddr_in));
 509                         ro->ro_dst.sa_family = AF_INET;
 510                         ro->ro_dst.sa_len = sizeof(struct sockaddr_in);
 511                         ((struct sockaddr_in *) &ro->ro_dst)->sin_addr =
 512                                 sin->sin_addr;
 513                         rtalloc(ro);
 514                 }
 515                 /*
 516                  * If we found a route, use the address
 517                  * corresponding to the outgoing interface
 518                  * unless it is the loopback (in case a route
 519                  * to our address on another net goes to loopback).
 520                  */
 521                 if (ro->ro_rt && !(ro->ro_rt->rt_ifp->if_flags & IFF_LOOPBACK))
 522                         ia = ifatoia(ro->ro_rt->rt_ifa);
 523                 if (ia == NULL) {
 524                         u_short fport = sin->sin_port;
 525
 526                         sin->sin_port = 0;
 527                         ia = ifatoia(ifa_ifwithdstaddr(sintosa(sin)));
 528                         if (ia == NULL)
 529                                 ia = ifatoia(ifa_ifwithnet(sintosa(sin)));
 530                         sin->sin_port = fport;
 531                         if (ia == NULL)
 532                                 ia = TAILQ_FIRST(&in_ifaddrhead);
 533                         if (ia == NULL)
 534                                 return (EADDRNOTAVAIL);
 535                 }
 536                 /*
 537                  * If the destination address is multicast and an outgoing
 538                  * interface has been set as a multicast option, use the
 539                  * address of that interface as our source address.
 540                  */
 541                 if (IN_MULTICAST(ntohl(sin->sin_addr.s_addr)) &&
 542                     inp->inp_moptions != NULL) {
 543                         struct ip_moptions *imo;
 544                         struct ifnet *ifp;
 545
 546                         imo = inp->inp_moptions;
 547                         if (imo->imo_multicast_ifp != NULL) {
 548                                 ifp = imo->imo_multicast_ifp;
 549                                 TAILQ_FOREACH(ia, &in_ifaddrhead, ia_link)
 550                                         if (ia->ia_ifp == ifp)
 551                                                 break;
 552                                 if (ia == NULL)
 553                                         return (EADDRNOTAVAIL);
 554                         }
 555                 }
 556                 /*
 557                  * Don't do pcblookup call here; return interface in plocal_sin
 558                  * and exit to caller, that will do the lookup.
 559                  */
 560                 *plocal_sin = &ia->ia_addr;
 561
 562         }
 563         return (0);
 564 }
 565
 566 /*
 567  * Outer subroutine:
 568  * Connect from a socket to a specified address.
 569  * Both address and port must be specified in argument sin.
 570  * If don't have a local address for this socket yet,
 571  * then pick one.
 572  */
 573 int
 574 in_pcbconnect(struct inpcb *inp, struct sockaddr *nam, struct thread *td)
 575 {
 576         struct sockaddr_in *if_sin;
 577         struct sockaddr_in *sin = (struct sockaddr_in *)nam;
 578         struct sockaddr_in sa;
 579         struct ucred *cr = td->td_proc ? td->td_proc->p_ucred : NULL;
 580         int error;
 581
 582         if (cr && cr->cr_prison != NULL && in_nullhost(inp->inp_laddr)) {
 583                 bzero(&sa, sizeof sa);
 584                 sa.sin_addr.s_addr = htonl(cr->cr_prison->pr_ip);
 585                 sa.sin_len = sizeof sa;
 586                 sa.sin_family = AF_INET;
 587                 error = in_pcbbind(inp, (struct sockaddr *)&sa, td);
 588                 if (error)
 589                         return (error);
 590         }
 591
 592         /* Call inner routine to assign local interface address. */
 593         if ((error = in_pcbladdr(inp, nam, &if_sin)) != 0)
 594                 return (error);
 595
 596         if (in_pcblookup_hash(inp->inp_cpcbinfo, sin->sin_addr, sin->sin_port,
 597             inp->inp_laddr.s_addr ? inp->inp_laddr : if_sin->sin_addr,
 598             inp->inp_lport, FALSE, NULL) != NULL) {
 599                 return (EADDRINUSE);
 600         }
 601         if (inp->inp_laddr.s_addr == INADDR_ANY) {
 602                 if (inp->inp_lport == 0) {
 603                         error = in_pcbbind(inp, (struct sockaddr *)NULL, td);
 604                         if (error)
 605                                 return (error);
 606                 }
 607                 inp->inp_laddr = if_sin->sin_addr;
 608         }
 609         inp->inp_faddr = sin->sin_addr;
 610         inp->inp_fport = sin->sin_port;
 611         in_pcbinsconnhash(inp);
 612         return (0);
 613 }
 614
 615 void
 616 in_pcbdisconnect(inp)
 617         struct inpcb *inp;
 618 {
 619
 620         inp->inp_faddr.s_addr = INADDR_ANY;
 621         inp->inp_fport = 0;
 622         in_pcbremconnhash(inp);
 623         if (inp->inp_socket->so_state & SS_NOFDREF)
 624                 in_pcbdetach(inp);
 625 }
 626
 627 void
 628 in_pcbdetach(inp)
 629         struct inpcb *inp;
 630 {
 631         struct socket *so = inp->inp_socket;
 632         struct inpcbinfo *ipi = inp->inp_pcbinfo;
 633
 634 #ifdef IPSEC
 635         ipsec4_delete_pcbpolicy(inp);
 636 #endif /*IPSEC*/
 637         inp->inp_gencnt = ++ipi->ipi_gencnt;
 638         in_pcbremlists(inp);
 639         so->so_pcb = 0;
 640         sofree(so);
 641         if (inp->inp_options)
 642                 (void)m_free(inp->inp_options);
 643         if (inp->inp_route.ro_rt)
 644                 rtfree(inp->inp_route.ro_rt);
 645         ip_freemoptions(inp->inp_moptions);
 646         inp->inp_vflag = 0;
 647         zfree(ipi->ipi_zone, inp);
 648 }
 649
 650 /*
 651  * The calling convention of in_setsockaddr() and in_setpeeraddr() was
 652  * modified to match the pru_sockaddr() and pru_peeraddr() entry points
 653  * in struct pr_usrreqs, so that protocols can just reference then directly
 654  * without the need for a wrapper function.  The socket must have a valid
 655  * (i.e., non-nil) PCB, but it should be impossible to get an invalid one
 656  * except through a kernel programming error, so it is acceptable to panic
 657  * (or in this case trap) if the PCB is invalid.  (Actually, we don't trap
 658  * because there actually /is/ a programming error somewhere... XXX)
 659  */
 660 int
 661 in_setsockaddr(so, nam)
 662         struct socket *so;
 663         struct sockaddr **nam;
 664 {
 665         int s;
 666         struct inpcb *inp;
 667         struct sockaddr_in *sin;
 668
 669         /*
 670          * Do the malloc first in case it blocks.
 671          */
 672         MALLOC(sin, struct sockaddr_in *, sizeof *sin, M_SONAME,
 673                 M_WAITOK | M_ZERO);
 674         sin->sin_family = AF_INET;
 675         sin->sin_len = sizeof *sin;
 676
 677         s = splnet();
 678         inp = sotoinpcb(so);
 679         if (!inp) {
 680                 splx(s);
 681                 free(sin, M_SONAME);
 682                 return (ECONNRESET);
 683         }
 684         sin->sin_port = inp->inp_lport;
 685         sin->sin_addr = inp->inp_laddr;
 686         splx(s);
 687
 688         *nam = (struct sockaddr *)sin;
 689         return (0);
 690 }
 691
 692 int
 693 in_setpeeraddr(so, nam)
 694         struct socket *so;
 695         struct sockaddr **nam;
 696 {
 697         int s;
 698         struct inpcb *inp;
 699         struct sockaddr_in *sin;
 700
 701         /*
 702          * Do the malloc first in case it blocks.
 703          */
 704         MALLOC(sin, struct sockaddr_in *, sizeof *sin, M_SONAME,
 705                 M_WAITOK | M_ZERO);
 706         sin->sin_family = AF_INET;
 707         sin->sin_len = sizeof *sin;
 708
 709         s = splnet();
 710         inp = sotoinpcb(so);
 711         if (!inp) {
 712                 splx(s);
 713                 free(sin, M_SONAME);
 714                 return (ECONNRESET);
 715         }
 716         sin->sin_port = inp->inp_fport;
 717         sin->sin_addr = inp->inp_faddr;
 718         splx(s);
 719
 720         *nam = (struct sockaddr *)sin;
 721         return (0);
 722 }
 723
 724 void
 725 in_pcbnotifyall(head, faddr, errno, notify)
 726         struct inpcbhead *head;
 727         struct in_addr faddr;
 728         void (*notify) (struct inpcb *, int);
 729 {
 730         struct inpcb *inp, *ninp;
 731         int s;
 732
 733         /*
 734          * note: if INP_PLACEMARKER is set we must ignore the rest of
 735          * the structure and skip it.
 736          */
 737         s = splnet();
 738         for (inp = LIST_FIRST(head); inp != NULL; inp = ninp) {
 739                 ninp = LIST_NEXT(inp, inp_list);
 740                 if (inp->inp_flags & INP_PLACEMARKER)
 741                         continue;
 742 #ifdef INET6
 743                 if (!(inp->inp_vflag & INP_IPV4))
 744                         continue;
 745 #endif
 746                 if (inp->inp_faddr.s_addr != faddr.s_addr ||
 747                     inp->inp_socket == NULL)
 748                         continue;
 749                 (*notify)(inp, errno);
 750         }
 751         splx(s);
 752 }
 753
 754 void
 755 in_pcbpurgeif0(head, ifp)
 756         struct inpcb *head;
 757         struct ifnet *ifp;
 758 {
 759         struct inpcb *inp;
 760         struct ip_moptions *imo;
 761         int i, gap;
 762
 763         for (inp = head; inp != NULL; inp = LIST_NEXT(inp, inp_list)) {
 764                 if (inp->inp_flags & INP_PLACEMARKER)
 765                         continue;
 766                 imo = inp->inp_moptions;
 767                 if ((inp->inp_vflag & INP_IPV4) && imo != NULL) {
 768                         /*
 769                          * Unselect the outgoing interface if it is being
 770                          * detached.
 771                          */
 772                         if (imo->imo_multicast_ifp == ifp)
 773                                 imo->imo_multicast_ifp = NULL;
 774
 775                         /*
 776                          * Drop multicast group membership if we joined
 777                          * through the interface being detached.
 778                          */
 779                         for (i = 0, gap = 0; i < imo->imo_num_memberships;
 780                             i++) {
 781                                 if (imo->imo_membership[i]->inm_ifp == ifp) {
 782                                         in_delmulti(imo->imo_membership[i]);
 783                                         gap++;
 784                                 } else if (gap != 0)
 785                                         imo->imo_membership[i - gap] =
 786                                             imo->imo_membership[i];
 787                         }
 788                         imo->imo_num_memberships -= gap;
 789                 }
 790         }
 791 }
 792
 793 /*
 794  * Check for alternatives when higher level complains
 795  * about service problems.  For now, invalidate cached
 796  * routing information.  If the route was created dynamically
 797  * (by a redirect), time to try a default gateway again.
 798  */
 799 void
 800 in_losing(inp)
 801         struct inpcb *inp;
 802 {
 803         struct rtentry *rt;
 804         struct rt_addrinfo info;
 805
 806         if ((rt = inp->inp_route.ro_rt)) {
 807                 bzero((caddr_t)&info, sizeof info);
 808                 info.rti_flags = rt->rt_flags;
 809                 info.rti_info[RTAX_DST] = rt_key(rt);
 810                 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway;
 811                 info.rti_info[RTAX_NETMASK] = rt_mask(rt);
 812                 rt_missmsg(RTM_LOSING, &info, rt->rt_flags, 0);
 813                 if (rt->rt_flags & RTF_DYNAMIC)
 814                         (void) rtrequest1(RTM_DELETE, &info, NULL);
 815                 inp->inp_route.ro_rt = NULL;
 816                 rtfree(rt);
 817                 /*
 818                  * A new route can be allocated
 819                  * the next time output is attempted.
 820                  */
 821         }
 822 }
 823
 824 /*
 825  * After a routing change, flush old routing
 826  * and allocate a (hopefully) better one.
 827  */
 828 void
 829 in_rtchange(inp, errno)
 830         struct inpcb *inp;
 831         int errno;
 832 {
 833         if (inp->inp_route.ro_rt) {
 834                 rtfree(inp->inp_route.ro_rt);
 835                 inp->inp_route.ro_rt = 0;
 836                 /*
 837                  * A new route can be allocated the next time
 838                  * output is attempted.
 839                  */
 840         }
 841 }
 842
 843 /*
 844  * Lookup a PCB based on the local address and port.
 845  */
 846 struct inpcb *
 847 in_pcblookup_local(pcbinfo, laddr, lport_arg, wild_okay)
 848         struct inpcbinfo *pcbinfo;
 849         struct in_addr laddr;
 850         u_int lport_arg;
 851         int wild_okay;
 852 {
 853         struct inpcb *inp;
 854         int matchwild = 3, wildcard;
 855         u_short lport = lport_arg;
 856
 857         struct inpcbporthead *porthash;
 858         struct inpcbport *phd;
 859         struct inpcb *match = NULL;
 860
 861         /*
 862          * Best fit PCB lookup.
 863          *
 864          * First see if this local port is in use by looking on the
 865          * port hash list.
 866          */
 867         porthash = &pcbinfo->porthashbase[INP_PCBPORTHASH(lport,
 868             pcbinfo->porthashmask)];
 869         LIST_FOREACH(phd, porthash, phd_hash) {
 870                 if (phd->phd_port == lport)
 871                         break;
 872         }
 873         if (phd != NULL) {
 874                 /*
 875                  * Port is in use by one or more PCBs. Look for best
 876                  * fit.
 877                  */
 878                 LIST_FOREACH(inp, &phd->phd_pcblist, inp_portlist) {
 879                         wildcard = 0;
 880 #ifdef INET6
 881                         if ((inp->inp_vflag & INP_IPV4) == 0)
 882                                 continue;
 883 #endif
 884                         if (inp->inp_faddr.s_addr != INADDR_ANY)
 885                                 wildcard++;
 886                         if (inp->inp_laddr.s_addr != INADDR_ANY) {
 887                                 if (laddr.s_addr == INADDR_ANY)
 888                                         wildcard++;
 889                                 else if (inp->inp_laddr.s_addr != laddr.s_addr)
 890                                         continue;
 891                         } else {
 892                                 if (laddr.s_addr != INADDR_ANY)
 893                                         wildcard++;
 894                         }
 895                         if (wildcard && !wild_okay)
 896                                 continue;
 897                         if (wildcard < matchwild) {
 898                                 match = inp;
 899                                 matchwild = wildcard;
 900                                 if (matchwild == 0) {
 901                                         break;
 902                                 }
 903                         }
 904                 }
 905         }
 906         return (match);
 907 }
 908
 909 /*
 910  * Lookup PCB in hash list.
 911  */
 912 struct inpcb *
 913 in_pcblookup_hash(pcbinfo, faddr, fport_arg, laddr, lport_arg, wildcard, ifp)
 914         struct inpcbinfo *pcbinfo;
 915         struct in_addr faddr, laddr;
 916         u_int fport_arg, lport_arg;
 917         boolean_t wildcard;
 918         struct ifnet *ifp;
 919 {
 920         struct inpcbhead *head;
 921         struct inpcb *inp;
 922         u_short fport = fport_arg, lport = lport_arg;
 923
 924         /*
 925          * First look for an exact match.
 926          */
 927         head = &pcbinfo->hashbase[INP_PCBCONNHASH(faddr.s_addr, fport,
 928             laddr.s_addr, lport, pcbinfo->hashmask)];
 929         LIST_FOREACH(inp, head, inp_hash) {
 930 #ifdef INET6
 931                 if (!(inp->inp_vflag & INP_IPV4))
 932                         continue;
 933 #endif
 934                 if (in_hosteq(inp->inp_faddr, faddr) &&
 935                     in_hosteq(inp->inp_laddr, laddr) &&
 936                     inp->inp_fport == fport && inp->inp_lport == lport) {
 937                         /* found */
 938                         return (inp);
 939                 }
 940         }
 941
 942         if (wildcard) {
 943                 struct inpcb *local_wild = NULL;
 944 #ifdef INET6
 945                 struct inpcb *local_wild_mapped = NULL;
 946 #endif
 947                 struct inpcontainer *ic;
 948                 struct inpcontainerhead *chead;
 949
 950                 chead = &pcbinfo->wildcardhashbase[
 951                     INP_PCBWILDCARDHASH(lport, pcbinfo->wildcardhashmask)];
 952                 LIST_FOREACH(ic, chead, ic_list) {
 953                         inp = ic->ic_inp;
 954 #ifdef INET6
 955                         if (!(inp->inp_vflag & INP_IPV4))
 956                                 continue;
 957 #endif
 958                         if (inp->inp_lport == lport) {
 959                                 if (ifp && ifp->if_type == IFT_FAITH &&
 960                                     !(inp->inp_flags & INP_FAITH))
 961                                         continue;
 962                                 if (inp->inp_laddr.s_addr == laddr.s_addr)
 963                                         return (inp);
 964                                 if (inp->inp_laddr.s_addr == INADDR_ANY) {
 965 #ifdef INET6
 966                                         if (INP_CHECK_SOCKAF(inp->inp_socket,
 967                                                              AF_INET6))
 968                                                 local_wild_mapped = inp;
 969                                         else
 970 #endif
 971                                                 local_wild = inp;
 972                                 }
 973                         }
 974                 }
 975 #ifdef INET6
 976                 if (local_wild == NULL)
 977                         return (local_wild_mapped);
 978 #endif
 979                 return (local_wild);
 980         }
 981
 982         /*
 983          * Not found.
 984          */
 985         return (NULL);
 986 }
 987
 988 /*
 989  * Insert PCB into connection hash table.
 990  */
 991 void
 992 in_pcbinsconnhash(struct inpcb *inp)
 993 {
 994         struct inpcbinfo *pcbinfo = inp->inp_cpcbinfo;
 995         struct inpcbhead *bucket;
 996         u_int32_t hashkey_faddr, hashkey_laddr;
 997
 998 #ifdef INET6
 999         if (inp->inp_vflag & INP_IPV6) {
1000                 hashkey_faddr = inp->in6p_faddr.s6_addr32[3] /* XXX JH */;
1001                 hashkey_laddr = inp->in6p_laddr.s6_addr32[3] /* XXX JH */;
1002         } else {
1003 #endif
1004                 hashkey_faddr = inp->inp_faddr.s_addr;
1005                 hashkey_laddr = inp->inp_laddr.s_addr;
1006 #ifdef INET6
1007         }
1008 #endif
1009
1010         KASSERT(!(inp->inp_flags & INP_CONNECTED), ("already on hash list"));
1011         inp->inp_flags |= INP_CONNECTED;
1012
1013         /*
1014          * Insert into the connection hash table.
1015          */
1016         bucket = &pcbinfo->hashbase[INP_PCBCONNHASH(hashkey_faddr,
1017             inp->inp_fport, hashkey_laddr, inp->inp_lport, pcbinfo->hashmask)];
1018         LIST_INSERT_HEAD(bucket, inp, inp_hash);
1019 }
1020
1021 /*
1022  * Remove PCB from connection hash table.
1023  */
1024 void
1025 in_pcbremconnhash(struct inpcb *inp)
1026 {
1027         KASSERT(inp->inp_flags & INP_CONNECTED, ("inp not connected"));
1028         LIST_REMOVE(inp, inp_hash);
1029         inp->inp_flags &= ~INP_CONNECTED;
1030 }
1031
1032 /*
1033  * Insert PCB into port hash table.
1034  */
1035 int
1036 in_pcbinsporthash(struct inpcb *inp)
1037 {
1038         struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
1039         struct inpcbporthead *pcbporthash;
1040         struct inpcbport *phd;
1041
1042         /*
1043          * Insert into the port hash table.
1044          */
1045         pcbporthash = &pcbinfo->porthashbase[
1046             INP_PCBPORTHASH(inp->inp_lport, pcbinfo->porthashmask)];
1047
1048         /* Go through port list and look for a head for this lport. */
1049         LIST_FOREACH(phd, pcbporthash, phd_hash)
1050                 if (phd->phd_port == inp->inp_lport)
1051                         break;
1052
1053         /* If none exists, malloc one and tack it on. */
1054         if (phd == NULL) {
1055                 MALLOC(phd, struct inpcbport *, sizeof(struct inpcbport),
1056                     M_PCB, M_INTWAIT | M_NULLOK);
1057                 if (phd == NULL)
1058                         return (ENOBUFS); /* XXX */
1059                 phd->phd_port = inp->inp_lport;
1060                 LIST_INIT(&phd->phd_pcblist);
1061                 LIST_INSERT_HEAD(pcbporthash, phd, phd_hash);
1062         }
1063
1064         inp->inp_phd = phd;
1065         LIST_INSERT_HEAD(&phd->phd_pcblist, inp, inp_portlist);
1066
1067         return (0);
1068 }
1069
1070 void
1071 in_pcbinswildcardhash_oncpu(struct inpcb *inp, struct inpcbinfo *pcbinfo)
1072 {
1073         struct inpcontainer *ic;
1074         struct inpcontainerhead *bucket;
1075
1076         bucket = &pcbinfo->wildcardhashbase[
1077             INP_PCBWILDCARDHASH(inp->inp_lport, pcbinfo->wildcardhashmask)];
1078
1079         ic = malloc(sizeof(struct inpcontainer), M_TEMP, M_INTWAIT);
1080         ic->ic_inp = inp;
1081         LIST_INSERT_HEAD(bucket, ic, ic_list);
1082 }
1083
1084 /*
1085  * Insert PCB into wildcard hash table.
1086  */
1087 void
1088 in_pcbinswildcardhash(struct inpcb *inp)
1089 {
1090         struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
1091
1092         KKASSERT(pcbinfo != NULL);
1093
1094         in_pcbinswildcardhash_oncpu(inp, pcbinfo);
1095         inp->inp_flags |= INP_WILDCARD;
1096 }
1097
1098 void
1099 in_pcbremwildcardhash_oncpu(struct inpcb *inp, struct inpcbinfo *pcbinfo)
1100 {
1101         struct inpcontainer *ic;
1102         struct inpcontainerhead *head;
1103
1104         /* find bucket */
1105         head = &pcbinfo->wildcardhashbase[
1106             INP_PCBWILDCARDHASH(inp->inp_lport, pcbinfo->wildcardhashmask)];
1107
1108         LIST_FOREACH(ic, head, ic_list) {
1109                 if (ic->ic_inp == inp)
1110                         goto found;
1111         }
1112         return;                 /* not found! */
1113
1114 found:
1115         LIST_REMOVE(ic, ic_list);       /* remove container from bucket chain */
1116         free(ic, M_TEMP);               /* deallocate container */
1117 }
1118
1119 /*
1120  * Remove PCB from wildcard hash table.
1121  */
1122 void
1123 in_pcbremwildcardhash(struct inpcb *inp)
1124 {
1125         struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
1126
1127         KASSERT(inp->inp_flags & INP_WILDCARD, ("inp not wildcard"));
1128         in_pcbremwildcardhash_oncpu(inp, pcbinfo);
1129         inp->inp_flags &= ~INP_WILDCARD;
1130 }
1131
1132 /*
1133  * Remove PCB from various lists.
1134  */
1135 void
1136 in_pcbremlists(inp)
1137         struct inpcb *inp;
1138 {
1139         if (inp->inp_lport) {
1140                 struct inpcbport *phd = inp->inp_phd;
1141
1142                 LIST_REMOVE(inp, inp_portlist);
1143                 if (LIST_FIRST(&phd->phd_pcblist) == NULL) {
1144                         LIST_REMOVE(phd, phd_hash);
1145                         free(phd, M_PCB);
1146                 }
1147         }
1148         if (inp->inp_flags & INP_WILDCARD) {
1149                 in_pcbremwildcardhash(inp);
1150         } else if (inp->inp_flags & INP_CONNECTED) {
1151                 in_pcbremconnhash(inp);
1152         }
1153         LIST_REMOVE(inp, inp_list);
1154         inp->inp_pcbinfo->ipi_count--;
1155 }
1156
1157 int
1158 prison_xinpcb(struct thread *td, struct inpcb *inp)
1159 {
1160         struct ucred *cr;
1161
1162         if (td->td_proc == NULL)
1163                 return (0);
1164         cr = td->td_proc->p_ucred;
1165         if (cr->cr_prison == NULL)
1166                 return (0);
1167         if (ntohl(inp->inp_laddr.s_addr) == cr->cr_prison->pr_ip)
1168                 return (0);
1169         return (1);
1170 }