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
  88 #include <sys/thread2.h>
  89 #include <sys/socketvar2.h>
  90
  91 #include <machine/limits.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 #define RANGECHK(var, min, max) \
 137         if ((var) < (min)) { (var) = (min); } \
 138         else if ((var) > (max)) { (var) = (max); }
 139
 140 static int
 141 sysctl_net_ipport_check(SYSCTL_HANDLER_ARGS)
 142 {
 143         int error;
 144
 145         error = sysctl_handle_int(oidp, oidp->oid_arg1, oidp->oid_arg2, req);
 146         if (!error) {
 147                 RANGECHK(ipport_lowfirstauto, 1, IPPORT_RESERVED - 1);
 148                 RANGECHK(ipport_lowlastauto, 1, IPPORT_RESERVED - 1);
 149
 150                 RANGECHK(ipport_firstauto, IPPORT_RESERVED, USHRT_MAX);
 151                 RANGECHK(ipport_lastauto, IPPORT_RESERVED, USHRT_MAX);
 152
 153                 RANGECHK(ipport_hifirstauto, IPPORT_RESERVED, USHRT_MAX);
 154                 RANGECHK(ipport_hilastauto, IPPORT_RESERVED, USHRT_MAX);
 155         }
 156         return (error);
 157 }
 158
 159 #undef RANGECHK
 160
 161 SYSCTL_NODE(_net_inet_ip, IPPROTO_IP, portrange, CTLFLAG_RW, 0, "IP Ports");
 162
 163 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, lowfirst, CTLTYPE_INT|CTLFLAG_RW,
 164            &ipport_lowfirstauto, 0, &sysctl_net_ipport_check, "I", "");
 165 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, lowlast, CTLTYPE_INT|CTLFLAG_RW,
 166            &ipport_lowlastauto, 0, &sysctl_net_ipport_check, "I", "");
 167 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, first, CTLTYPE_INT|CTLFLAG_RW,
 168            &ipport_firstauto, 0, &sysctl_net_ipport_check, "I", "");
 169 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, last, CTLTYPE_INT|CTLFLAG_RW,
 170            &ipport_lastauto, 0, &sysctl_net_ipport_check, "I", "");
 171 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, hifirst, CTLTYPE_INT|CTLFLAG_RW,
 172            &ipport_hifirstauto, 0, &sysctl_net_ipport_check, "I", "");
 173 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, hilast, CTLTYPE_INT|CTLFLAG_RW,
 174            &ipport_hilastauto, 0, &sysctl_net_ipport_check, "I", "");
 175
 176 /*
 177  * in_pcb.c: manage the Protocol Control Blocks.
 178  *
 179  * NOTE: It is assumed that most of these functions will be called from
 180  * a critical section.  XXX - There are, unfortunately, a few exceptions
 181  * to this rule that should be fixed.
 182  *
 183  * NOTE: The caller should initialize the cpu field to the cpu running the
 184  * protocol stack associated with this inpcbinfo.
 185  */
 186
 187 void
 188 in_pcbinfo_init(struct inpcbinfo *pcbinfo)
 189 {
 190         LIST_INIT(&pcbinfo->pcblisthead);
 191         pcbinfo->cpu = -1;
 192 }
 193
 194 /*
 195  * Allocate a PCB and associate it with the socket.
 196  */
 197 int
 198 in_pcballoc(struct socket *so, struct inpcbinfo *pcbinfo)
 199 {
 200         struct inpcb *inp;
 201 #ifdef IPSEC
 202         int error;
 203 #endif
 204
 205         inp = kmalloc(pcbinfo->ipi_size, M_PCB, M_WAITOK|M_ZERO);
 206         inp->inp_gencnt = ++pcbinfo->ipi_gencnt;
 207         inp->inp_pcbinfo = inp->inp_cpcbinfo = pcbinfo;
 208         inp->inp_socket = so;
 209 #ifdef IPSEC
 210         error = ipsec_init_policy(so, &inp->inp_sp);
 211         if (error != 0) {
 212                 kfree(inp, M_PCB);
 213                 return (error);
 214         }
 215 #endif
 216 #ifdef INET6
 217         if (INP_SOCKAF(so) == AF_INET6 && ip6_v6only)
 218                 inp->inp_flags |= IN6P_IPV6_V6ONLY;
 219         if (ip6_auto_flowlabel)
 220                 inp->inp_flags |= IN6P_AUTOFLOWLABEL;
 221 #endif
 222         soreference(so);
 223         so->so_pcb = inp;
 224         LIST_INSERT_HEAD(&pcbinfo->pcblisthead, inp, inp_list);
 225         pcbinfo->ipi_count++;
 226         return (0);
 227 }
 228
 229 int
 230 in_pcbbind(struct inpcb *inp, struct sockaddr *nam, struct thread *td)
 231 {
 232         struct socket *so = inp->inp_socket;
 233         struct proc *p = td->td_proc;
 234         unsigned short *lastport;
 235         struct sockaddr_in *sin;
 236         struct sockaddr_in jsin;
 237         struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
 238         struct ucred *cred = NULL;
 239         u_short lport = 0;
 240         int wild = 0, reuseport = (so->so_options & SO_REUSEPORT);
 241         int error;
 242
 243         KKASSERT(p);
 244
 245         if (TAILQ_EMPTY(&in_ifaddrheads[mycpuid])) /* XXX broken! */
 246                 return (EADDRNOTAVAIL);
 247         if (inp->inp_lport != 0 || inp->inp_laddr.s_addr != INADDR_ANY)
 248                 return (EINVAL);        /* already bound */
 249         if (!(so->so_options & (SO_REUSEADDR|SO_REUSEPORT)))
 250                 wild = 1;    /* neither SO_REUSEADDR nor SO_REUSEPORT is set */
 251         if (p)
 252                 cred = p->p_ucred;
 253         if (nam != NULL) {
 254                 sin = (struct sockaddr_in *)nam;
 255                 if (nam->sa_len != sizeof *sin)
 256                         return (EINVAL);
 257 #ifdef notdef
 258                 /*
 259                  * We should check the family, but old programs
 260                  * incorrectly fail to initialize it.
 261                  */
 262                 if (sin->sin_family != AF_INET)
 263                         return (EAFNOSUPPORT);
 264 #endif
 265                 if (!prison_replace_wildcards(td, nam))
 266                                 return (EINVAL);
 267                 lport = sin->sin_port;
 268                 if (IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
 269                         /*
 270                          * Treat SO_REUSEADDR as SO_REUSEPORT for multicast;
 271                          * allow complete duplication of binding if
 272                          * SO_REUSEPORT is set, or if SO_REUSEADDR is set
 273                          * and a multicast address is bound on both
 274                          * new and duplicated sockets.
 275                          */
 276                         if (so->so_options & SO_REUSEADDR)
 277                                 reuseport = SO_REUSEADDR | SO_REUSEPORT;
 278                 } else if (sin->sin_addr.s_addr != INADDR_ANY) {
 279                         sin->sin_port = 0;              /* yech... */
 280                         bzero(&sin->sin_zero, sizeof sin->sin_zero);
 281                         if (ifa_ifwithaddr((struct sockaddr *)sin) == NULL)
 282                                 return (EADDRNOTAVAIL);
 283                 }
 284                 if (lport != 0) {
 285                         struct inpcb *t;
 286
 287                         /* GROSS */
 288                         if (ntohs(lport) < IPPORT_RESERVED &&
 289                             cred && priv_check_cred(cred, PRIV_NETINET_RESERVEDPORT, 0))
 290                                 return (EACCES);
 291                         if (so->so_cred->cr_uid != 0 &&
 292                             !IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
 293                                 t = in_pcblookup_local(inp->inp_pcbinfo,
 294                                     sin->sin_addr, lport,
 295                                     INPLOOKUP_WILDCARD, cred);
 296                                 if (t &&
 297                                     (!in_nullhost(sin->sin_addr) ||
 298                                      !in_nullhost(t->inp_laddr) ||
 299                                      (t->inp_socket->so_options &
 300                                          SO_REUSEPORT) == 0) &&
 301                                     (so->so_cred->cr_uid !=
 302                                      t->inp_socket->so_cred->cr_uid)) {
 303 #ifdef INET6
 304                                         if (!in_nullhost(sin->sin_addr) ||
 305                                             !in_nullhost(t->inp_laddr) ||
 306                                             INP_SOCKAF(so) ==
 307                                             INP_SOCKAF(t->inp_socket))
 308 #endif
 309                                         return (EADDRINUSE);
 310                                 }
 311                         }
 312                         if (cred && !prison_replace_wildcards(td, nam))
 313                                 return (EADDRNOTAVAIL);
 314                         t = in_pcblookup_local(pcbinfo, sin->sin_addr, lport,
 315                                                wild, cred);
 316                         if (t && !(reuseport & t->inp_socket->so_options)) {
 317 #ifdef INET6
 318                                 if (!in_nullhost(sin->sin_addr) ||
 319                                     !in_nullhost(t->inp_laddr) ||
 320                                     INP_SOCKAF(so) == INP_SOCKAF(t->inp_socket))
 321 #endif
 322                                 return (EADDRINUSE);
 323                         }
 324                 }
 325                 inp->inp_laddr = sin->sin_addr;
 326         }
 327         if (lport == 0) {
 328                 ushort first, last;
 329                 int count;
 330
 331                 jsin.sin_family = AF_INET;
 332                 jsin.sin_addr.s_addr = inp->inp_laddr.s_addr;
 333                 if (!prison_replace_wildcards(td, (struct sockaddr *)&jsin)) {
 334                         inp->inp_laddr.s_addr = INADDR_ANY;
 335                         return (EINVAL);
 336                 }
 337                 inp->inp_laddr.s_addr = jsin.sin_addr.s_addr;
 338
 339                 inp->inp_flags |= INP_ANONPORT;
 340
 341                 if (inp->inp_flags & INP_HIGHPORT) {
 342                         first = ipport_hifirstauto;     /* sysctl */
 343                         last  = ipport_hilastauto;
 344                         lastport = &pcbinfo->lasthi;
 345                 } else if (inp->inp_flags & INP_LOWPORT) {
 346                         if (cred &&
 347                             (error = priv_check_cred(cred, PRIV_NETINET_RESERVEDPORT, 0))) {
 348                                 inp->inp_laddr.s_addr = INADDR_ANY;
 349                                 return (error);
 350                         }
 351                         first = ipport_lowfirstauto;    /* 1023 */
 352                         last  = ipport_lowlastauto;     /* 600 */
 353                         lastport = &pcbinfo->lastlow;
 354                 } else {
 355                         first = ipport_firstauto;       /* sysctl */
 356                         last  = ipport_lastauto;
 357                         lastport = &pcbinfo->lastport;
 358                 }
 359                 /*
 360                  * Simple check to ensure all ports are not used up causing
 361                  * a deadlock here.
 362                  *
 363                  * We split the two cases (up and down) so that the direction
 364                  * is not being tested on each round of the loop.
 365                  */
 366                 if (first > last) {
 367                         /*
 368                          * counting down
 369                          */
 370                         count = first - last;
 371
 372                         do {
 373                                 if (count-- < 0) {      /* completely used? */
 374                                         inp->inp_laddr.s_addr = INADDR_ANY;
 375                                         return (EADDRNOTAVAIL);
 376                                 }
 377                                 --*lastport;
 378                                 if (*lastport > first || *lastport < last)
 379                                         *lastport = first;
 380                                 lport = htons(*lastport);
 381                         } while (in_pcblookup_local(pcbinfo, inp->inp_laddr,
 382                                  lport, wild, cred));
 383                 } else {
 384                         /*
 385                          * counting up
 386                          */
 387                         count = last - first;
 388
 389                         do {
 390                                 if (count-- < 0) {      /* completely used? */
 391                                         inp->inp_laddr.s_addr = INADDR_ANY;
 392                                         return (EADDRNOTAVAIL);
 393                                 }
 394                                 ++*lastport;
 395                                 if (*lastport < first || *lastport > last)
 396                                         *lastport = first;
 397                                 lport = htons(*lastport);
 398                         } while (in_pcblookup_local(pcbinfo, inp->inp_laddr,
 399                                  lport, wild, cred));
 400                 }
 401         }
 402         inp->inp_lport = lport;
 403
 404         jsin.sin_family = AF_INET;
 405         jsin.sin_addr.s_addr = inp->inp_laddr.s_addr;
 406         if (!prison_replace_wildcards(td, (struct sockaddr*)&jsin)) {
 407                 inp->inp_laddr.s_addr = INADDR_ANY;
 408                 inp->inp_lport = 0;
 409                 return (EINVAL);
 410         }
 411         inp->inp_laddr.s_addr = jsin.sin_addr.s_addr;
 412
 413         if (in_pcbinsporthash(inp) != 0) {
 414                 inp->inp_laddr.s_addr = INADDR_ANY;
 415                 inp->inp_lport = 0;
 416                 return (EAGAIN);
 417         }
 418         return (0);
 419 }
 420
 421 /*
 422  *   Transform old in_pcbconnect() into an inner subroutine for new
 423  *   in_pcbconnect(): Do some validity-checking on the remote
 424  *   address (in mbuf 'nam') and then determine local host address
 425  *   (i.e., which interface) to use to access that remote host.
 426  *
 427  *   This preserves definition of in_pcbconnect(), while supporting a
 428  *   slightly different version for T/TCP.  (This is more than
 429  *   a bit of a kludge, but cleaning up the internal interfaces would
 430  *   have forced minor changes in every protocol).
 431  */
 432 int
 433 in_pcbladdr(struct inpcb *inp, struct sockaddr *nam,
 434         struct sockaddr_in **plocal_sin, struct thread *td)
 435 {
 436         struct in_ifaddr *ia;
 437         struct ucred *cred = NULL;
 438         struct sockaddr_in *sin = (struct sockaddr_in *)nam;
 439         struct sockaddr *jsin;
 440         int jailed = 0, alloc_route = 0;
 441
 442         if (nam->sa_len != sizeof *sin)
 443                 return (EINVAL);
 444         if (sin->sin_family != AF_INET)
 445                 return (EAFNOSUPPORT);
 446         if (sin->sin_port == 0)
 447                 return (EADDRNOTAVAIL);
 448         if (td && td->td_proc && td->td_proc->p_ucred)
 449                 cred = td->td_proc->p_ucred;
 450         if (cred && cred->cr_prison)
 451                 jailed = 1;
 452         if (!TAILQ_EMPTY(&in_ifaddrheads[mycpuid])) {
 453                 ia = TAILQ_FIRST(&in_ifaddrheads[mycpuid])->ia;
 454                 /*
 455                  * If the destination address is INADDR_ANY,
 456                  * use the primary local address.
 457                  * If the supplied address is INADDR_BROADCAST,
 458                  * and the primary interface supports broadcast,
 459                  * choose the broadcast address for that interface.
 460                  */
 461                 if (sin->sin_addr.s_addr == INADDR_ANY)
 462                         sin->sin_addr = IA_SIN(ia)->sin_addr;
 463                 else if (sin->sin_addr.s_addr == (u_long)INADDR_BROADCAST &&
 464                     (ia->ia_ifp->if_flags & IFF_BROADCAST))
 465                         sin->sin_addr = satosin(&ia->ia_broadaddr)->sin_addr;
 466         }
 467         if (inp->inp_laddr.s_addr == INADDR_ANY) {
 468                 struct route *ro;
 469
 470                 ia = NULL;
 471                 /*
 472                  * If route is known or can be allocated now,
 473                  * our src addr is taken from the i/f, else punt.
 474                  * Note that we should check the address family of the cached
 475                  * destination, in case of sharing the cache with IPv6.
 476                  */
 477                 ro = &inp->inp_route;
 478                 if (ro->ro_rt &&
 479                     (!(ro->ro_rt->rt_flags & RTF_UP) ||
 480                      ro->ro_dst.sa_family != AF_INET ||
 481                      satosin(&ro->ro_dst)->sin_addr.s_addr !=
 482                                       sin->sin_addr.s_addr ||
 483                      inp->inp_socket->so_options & SO_DONTROUTE)) {
 484                         RTFREE(ro->ro_rt);
 485                         ro->ro_rt = NULL;
 486                 }
 487                 if (!(inp->inp_socket->so_options & SO_DONTROUTE) && /*XXX*/
 488                     (ro->ro_rt == NULL ||
 489                     ro->ro_rt->rt_ifp == NULL)) {
 490                         /* No route yet, so try to acquire one */
 491                         bzero(&ro->ro_dst, sizeof(struct sockaddr_in));
 492                         ro->ro_dst.sa_family = AF_INET;
 493                         ro->ro_dst.sa_len = sizeof(struct sockaddr_in);
 494                         ((struct sockaddr_in *) &ro->ro_dst)->sin_addr =
 495                                 sin->sin_addr;
 496                         rtalloc(ro);
 497                         alloc_route = 1;
 498                 }
 499                 /*
 500                  * If we found a route, use the address
 501                  * corresponding to the outgoing interface
 502                  * unless it is the loopback (in case a route
 503                  * to our address on another net goes to loopback).
 504                  */
 505                 if (ro->ro_rt && !(ro->ro_rt->rt_ifp->if_flags & IFF_LOOPBACK)) {
 506                         if (jailed) {
 507                                 if (jailed_ip(cred->cr_prison,
 508                                     ro->ro_rt->rt_ifa->ifa_addr)) {
 509                                         ia = ifatoia(ro->ro_rt->rt_ifa);
 510                                 }
 511                         } else {
 512                                 ia = ifatoia(ro->ro_rt->rt_ifa);
 513                         }
 514                 }
 515                 if (ia == NULL) {
 516                         u_short fport = sin->sin_port;
 517
 518                         sin->sin_port = 0;
 519                         ia = ifatoia(ifa_ifwithdstaddr(sintosa(sin)));
 520                         if (ia && jailed && !jailed_ip(cred->cr_prison,
 521                             sintosa(&ia->ia_addr)))
 522                                 ia = NULL;
 523                         if (ia == NULL)
 524                                 ia = ifatoia(ifa_ifwithnet(sintosa(sin)));
 525                         if (ia && jailed && !jailed_ip(cred->cr_prison,
 526                             sintosa(&ia->ia_addr)))
 527                                 ia = NULL;
 528                         sin->sin_port = fport;
 529                         if (ia == NULL &&
 530                             !TAILQ_EMPTY(&in_ifaddrheads[mycpuid]))
 531                                 ia = TAILQ_FIRST(&in_ifaddrheads[mycpuid])->ia;
 532                         if (ia && jailed && !jailed_ip(cred->cr_prison,
 533                             sintosa(&ia->ia_addr)))
 534                                 ia = NULL;
 535
 536                         if (!jailed && ia == NULL)
 537                                 goto fail;
 538                 }
 539                 /*
 540                  * If the destination address is multicast and an outgoing
 541                  * interface has been set as a multicast option, use the
 542                  * address of that interface as our source address.
 543                  */
 544                 if (!jailed && IN_MULTICAST(ntohl(sin->sin_addr.s_addr)) &&
 545                     inp->inp_moptions != NULL) {
 546                         struct ip_moptions *imo;
 547                         struct ifnet *ifp;
 548
 549                         imo = inp->inp_moptions;
 550                         if (imo->imo_multicast_ifp != NULL) {
 551                                 struct in_ifaddr_container *iac;
 552
 553                                 ifp = imo->imo_multicast_ifp;
 554                                 ia = NULL;
 555                                 TAILQ_FOREACH(iac,
 556                                 &in_ifaddrheads[mycpuid], ia_link) {
 557                                         if (iac->ia->ia_ifp == ifp) {
 558                                                 ia = iac->ia;
 559                                                 break;
 560                                         }
 561                                 }
 562                                 if (ia == NULL)
 563                                         goto fail;
 564                         }
 565                 }
 566                 /*
 567                  * Don't do pcblookup call here; return interface in plocal_sin
 568                  * and exit to caller, that will do the lookup.
 569                  */
 570                 if (ia == NULL && jailed) {
 571                         if ((jsin = prison_get_nonlocal(cred->cr_prison, AF_INET, NULL)) != NULL ||
 572                             (jsin = prison_get_local(cred->cr_prison, AF_INET, NULL)) != NULL) {
 573                                 *plocal_sin = satosin(jsin);
 574                         } else {
 575                                 /* IPv6 only Jail */
 576                                 goto fail;
 577                         }
 578                 } else {
 579                         *plocal_sin = &ia->ia_addr;
 580                 }
 581         }
 582         return (0);
 583 fail:
 584         if (alloc_route) {
 585                 struct route *ro = &inp->inp_route;
 586
 587                 if (ro->ro_rt != NULL)
 588                         RTFREE(ro->ro_rt);
 589                 bzero(ro, sizeof(*ro));
 590         }
 591         return (EADDRNOTAVAIL);
 592 }
 593
 594 /*
 595  * Outer subroutine:
 596  * Connect from a socket to a specified address.
 597  * Both address and port must be specified in argument sin.
 598  * If don't have a local address for this socket yet,
 599  * then pick one.
 600  */
 601 int
 602 in_pcbconnect(struct inpcb *inp, struct sockaddr *nam, struct thread *td)
 603 {
 604         struct sockaddr_in *if_sin;
 605         struct sockaddr_in *sin = (struct sockaddr_in *)nam;
 606         int error;
 607
 608         /* Call inner routine to assign local interface address. */
 609         if ((error = in_pcbladdr(inp, nam, &if_sin, td)) != 0)
 610                 return (error);
 611
 612         if (in_pcblookup_hash(inp->inp_cpcbinfo, sin->sin_addr, sin->sin_port,
 613             inp->inp_laddr.s_addr ? inp->inp_laddr : if_sin->sin_addr,
 614             inp->inp_lport, FALSE, NULL) != NULL) {
 615                 return (EADDRINUSE);
 616         }
 617         if (inp->inp_laddr.s_addr == INADDR_ANY) {
 618                 if (inp->inp_lport == 0) {
 619                         error = in_pcbbind(inp, NULL, td);
 620                         if (error)
 621                                 return (error);
 622                 }
 623                 inp->inp_laddr = if_sin->sin_addr;
 624         }
 625         inp->inp_faddr = sin->sin_addr;
 626         inp->inp_fport = sin->sin_port;
 627         in_pcbinsconnhash(inp);
 628         return (0);
 629 }
 630
 631 void
 632 in_pcbdisconnect(struct inpcb *inp)
 633 {
 634
 635         inp->inp_faddr.s_addr = INADDR_ANY;
 636         inp->inp_fport = 0;
 637         in_pcbremconnhash(inp);
 638         if (inp->inp_socket->so_state & SS_NOFDREF)
 639                 in_pcbdetach(inp);
 640 }
 641
 642 void
 643 in_pcbdetach(struct inpcb *inp)
 644 {
 645         struct socket *so = inp->inp_socket;
 646         struct inpcbinfo *ipi = inp->inp_pcbinfo;
 647
 648 #ifdef IPSEC
 649         ipsec4_delete_pcbpolicy(inp);
 650 #endif /*IPSEC*/
 651         inp->inp_gencnt = ++ipi->ipi_gencnt;
 652         in_pcbremlists(inp);
 653         so->so_pcb = NULL;
 654         sofree(so);                     /* remove pcb ref */
 655         if (inp->inp_options)
 656                 m_free(inp->inp_options);
 657         if (inp->inp_route.ro_rt)
 658                 rtfree(inp->inp_route.ro_rt);
 659         ip_freemoptions(inp->inp_moptions);
 660         inp->inp_vflag = 0;
 661         kfree(inp, M_PCB);
 662 }
 663
 664 /*
 665  * The calling convention of in_setsockaddr() and in_setpeeraddr() was
 666  * modified to match the pru_sockaddr() and pru_peeraddr() entry points
 667  * in struct pr_usrreqs, so that protocols can just reference then directly
 668  * without the need for a wrapper function.  The socket must have a valid
 669  * (i.e., non-nil) PCB, but it should be impossible to get an invalid one
 670  * except through a kernel programming error, so it is acceptable to panic
 671  * (or in this case trap) if the PCB is invalid.  (Actually, we don't trap
 672  * because there actually /is/ a programming error somewhere... XXX)
 673  */
 674 int
 675 in_setsockaddr(struct socket *so, struct sockaddr **nam)
 676 {
 677         struct inpcb *inp;
 678         struct sockaddr_in *sin;
 679
 680         /*
 681          * Do the malloc first in case it blocks.
 682          */
 683         MALLOC(sin, struct sockaddr_in *, sizeof *sin, M_SONAME,
 684                 M_WAITOK | M_ZERO);
 685         sin->sin_family = AF_INET;
 686         sin->sin_len = sizeof *sin;
 687
 688         crit_enter();
 689         inp = so->so_pcb;
 690         if (!inp) {
 691                 crit_exit();
 692                 kfree(sin, M_SONAME);
 693                 return (ECONNRESET);
 694         }
 695         sin->sin_port = inp->inp_lport;
 696         sin->sin_addr = inp->inp_laddr;
 697         crit_exit();
 698
 699         *nam = (struct sockaddr *)sin;
 700         return (0);
 701 }
 702
 703 int
 704 in_setpeeraddr(struct socket *so, struct sockaddr **nam)
 705 {
 706         struct inpcb *inp;
 707         struct sockaddr_in *sin;
 708
 709         /*
 710          * Do the malloc first in case it blocks.
 711          */
 712         MALLOC(sin, struct sockaddr_in *, sizeof *sin, M_SONAME,
 713                 M_WAITOK | M_ZERO);
 714         sin->sin_family = AF_INET;
 715         sin->sin_len = sizeof *sin;
 716
 717         crit_enter();
 718         inp = so->so_pcb;
 719         if (!inp) {
 720                 crit_exit();
 721                 kfree(sin, M_SONAME);
 722                 return (ECONNRESET);
 723         }
 724         sin->sin_port = inp->inp_fport;
 725         sin->sin_addr = inp->inp_faddr;
 726         crit_exit();
 727
 728         *nam = (struct sockaddr *)sin;
 729         return (0);
 730 }
 731
 732 void
 733 in_pcbnotifyall(struct inpcbhead *head, struct in_addr faddr, int err,
 734                 void (*notify)(struct inpcb *, int))
 735 {
 736         struct inpcb *inp, *ninp;
 737
 738         /*
 739          * note: if INP_PLACEMARKER is set we must ignore the rest of
 740          * the structure and skip it.
 741          */
 742         crit_enter();
 743         LIST_FOREACH_MUTABLE(inp, head, inp_list, ninp) {
 744                 if (inp->inp_flags & INP_PLACEMARKER)
 745                         continue;
 746 #ifdef INET6
 747                 if (!(inp->inp_vflag & INP_IPV4))
 748                         continue;
 749 #endif
 750                 if (inp->inp_faddr.s_addr != faddr.s_addr ||
 751                     inp->inp_socket == NULL)
 752                         continue;
 753                 (*notify)(inp, err);            /* can remove inp from list! */
 754         }
 755         crit_exit();
 756 }
 757
 758 void
 759 in_pcbpurgeif0(struct inpcb *head, struct ifnet *ifp)
 760 {
 761         struct inpcb *inp;
 762         struct ip_moptions *imo;
 763         int i, gap;
 764
 765         for (inp = head; inp != NULL; inp = LIST_NEXT(inp, inp_list)) {
 766                 if (inp->inp_flags & INP_PLACEMARKER)
 767                         continue;
 768                 imo = inp->inp_moptions;
 769                 if ((inp->inp_vflag & INP_IPV4) && imo != NULL) {
 770                         /*
 771                          * Unselect the outgoing interface if it is being
 772                          * detached.
 773                          */
 774                         if (imo->imo_multicast_ifp == ifp)
 775                                 imo->imo_multicast_ifp = NULL;
 776
 777                         /*
 778                          * Drop multicast group membership if we joined
 779                          * through the interface being detached.
 780                          */
 781                         for (i = 0, gap = 0; i < imo->imo_num_memberships;
 782                             i++) {
 783                                 if (imo->imo_membership[i]->inm_ifp == ifp) {
 784                                         in_delmulti(imo->imo_membership[i]);
 785                                         gap++;
 786                                 } else if (gap != 0)
 787                                         imo->imo_membership[i - gap] =
 788                                             imo->imo_membership[i];
 789                         }
 790                         imo->imo_num_memberships -= gap;
 791                 }
 792         }
 793 }
 794
 795 /*
 796  * Check for alternatives when higher level complains
 797  * about service problems.  For now, invalidate cached
 798  * routing information.  If the route was created dynamically
 799  * (by a redirect), time to try a default gateway again.
 800  */
 801 void
 802 in_losing(struct inpcb *inp)
 803 {
 804         struct rtentry *rt;
 805         struct rt_addrinfo rtinfo;
 806
 807         if ((rt = inp->inp_route.ro_rt)) {
 808                 bzero(&rtinfo, sizeof(struct rt_addrinfo));
 809                 rtinfo.rti_info[RTAX_DST] = rt_key(rt);
 810                 rtinfo.rti_info[RTAX_GATEWAY] = rt->rt_gateway;
 811                 rtinfo.rti_info[RTAX_NETMASK] = rt_mask(rt);
 812                 rtinfo.rti_flags = rt->rt_flags;
 813                 rt_missmsg(RTM_LOSING, &rtinfo, rt->rt_flags, 0);
 814                 if (rt->rt_flags & RTF_DYNAMIC)
 815                         rtrequest1_global(RTM_DELETE, &rtinfo, NULL, NULL);
 816                 inp->inp_route.ro_rt = NULL;
 817                 rtfree(rt);
 818                 /*
 819                  * A new route can be allocated
 820                  * the next time output is attempted.
 821                  */
 822         }
 823 }
 824
 825 /*
 826  * After a routing change, flush old routing
 827  * and allocate a (hopefully) better one.
 828  */
 829 void
 830 in_rtchange(struct inpcb *inp, int err)
 831 {
 832         if (inp->inp_route.ro_rt) {
 833                 rtfree(inp->inp_route.ro_rt);
 834                 inp->inp_route.ro_rt = NULL;
 835                 /*
 836                  * A new route can be allocated the next time
 837                  * output is attempted.
 838                  */
 839         }
 840 }
 841
 842 /*
 843  * Lookup a PCB based on the local address and port.
 844  */
 845 struct inpcb *
 846 in_pcblookup_local(struct inpcbinfo *pcbinfo, struct in_addr laddr,
 847                    u_int lport_arg, int wild_okay, struct ucred *cred)
 848 {
 849         struct inpcb *inp;
 850         int matchwild = 3, wildcard;
 851         u_short lport = lport_arg;
 852
 853         struct inpcbporthead *porthash;
 854         struct inpcbport *phd;
 855         struct inpcb *match = NULL;
 856
 857         /*
 858          * Best fit PCB lookup.
 859          *
 860          * First see if this local port is in use by looking on the
 861          * port hash list.
 862          */
 863         porthash = &pcbinfo->porthashbase[INP_PCBPORTHASH(lport,
 864             pcbinfo->porthashmask)];
 865         LIST_FOREACH(phd, porthash, phd_hash) {
 866                 if (phd->phd_port == lport)
 867                         break;
 868         }
 869         if (phd != NULL) {
 870                 /*
 871                  * Port is in use by one or more PCBs. Look for best
 872                  * fit.
 873                  */
 874                 LIST_FOREACH(inp, &phd->phd_pcblist, inp_portlist) {
 875                         wildcard = 0;
 876 #ifdef INET6
 877                         if ((inp->inp_vflag & INP_IPV4) == 0)
 878                                 continue;
 879 #endif
 880                         if (inp->inp_faddr.s_addr != INADDR_ANY)
 881                                 wildcard++;
 882                         if (inp->inp_laddr.s_addr != INADDR_ANY) {
 883                                 if (laddr.s_addr == INADDR_ANY)
 884                                         wildcard++;
 885                                 else if (inp->inp_laddr.s_addr != laddr.s_addr)
 886                                         continue;
 887                         } else {
 888                                 if (laddr.s_addr != INADDR_ANY)
 889                                         wildcard++;
 890                         }
 891                         if (wildcard && !wild_okay)
 892                                 continue;
 893                         if (wildcard < matchwild &&
 894                             (cred == NULL ||
 895                              cred->cr_prison ==
 896                                         inp->inp_socket->so_cred->cr_prison)) {
 897                                 match = inp;
 898                                 matchwild = wildcard;
 899                                 if (matchwild == 0) {
 900                                         break;
 901                                 }
 902                         }
 903                 }
 904         }
 905         return (match);
 906 }
 907
 908 /*
 909  * Lookup PCB in hash list.
 910  */
 911 struct inpcb *
 912 in_pcblookup_hash(struct inpcbinfo *pcbinfo, struct in_addr faddr, u_int fport_arg,
 913                   struct in_addr laddr, u_int lport_arg, boolean_t wildcard,
 914                   struct ifnet *ifp)
 915 {
 916         struct inpcbhead *head;
 917         struct inpcb *inp, *jinp=NULL;
 918         u_short fport = fport_arg, lport = lport_arg;
 919
 920         /*
 921          * First look for an exact match.
 922          */
 923         head = &pcbinfo->hashbase[INP_PCBCONNHASH(faddr.s_addr, fport,
 924             laddr.s_addr, lport, pcbinfo->hashmask)];
 925         LIST_FOREACH(inp, head, inp_hash) {
 926 #ifdef INET6
 927                 if (!(inp->inp_vflag & INP_IPV4))
 928                         continue;
 929 #endif
 930                 if (in_hosteq(inp->inp_faddr, faddr) &&
 931                     in_hosteq(inp->inp_laddr, laddr) &&
 932                     inp->inp_fport == fport && inp->inp_lport == lport) {
 933                         /* found */
 934                         if (inp->inp_socket == NULL ||
 935                             inp->inp_socket->so_cred->cr_prison == NULL) {
 936                                 return (inp);
 937                         } else {
 938                                 if  (jinp == NULL)
 939                                         jinp = inp;
 940                         }
 941                 }
 942         }
 943         if (jinp != NULL)
 944                 return (jinp);
 945         if (wildcard) {
 946                 struct inpcb *local_wild = NULL;
 947                 struct inpcb *jinp_wild = NULL;
 948 #ifdef INET6
 949                 struct inpcb *local_wild_mapped = NULL;
 950 #endif
 951                 struct inpcontainer *ic;
 952                 struct inpcontainerhead *chead;
 953                 struct sockaddr_in jsin;
 954                 struct ucred *cred;
 955
 956                 /*
 957                  * Order of socket selection:
 958                  * 1. non-jailed, non-wild.
 959                  * 2. non-jailed, wild.
 960                  * 3. jailed, non-wild.
 961                  * 4. jailed, wild.
 962                  */
 963                 jsin.sin_family = AF_INET;
 964                 chead = &pcbinfo->wildcardhashbase[
 965                     INP_PCBWILDCARDHASH(lport, pcbinfo->wildcardhashmask)];
 966                 LIST_FOREACH(ic, chead, ic_list) {
 967                         inp = ic->ic_inp;
 968                         jsin.sin_addr.s_addr = laddr.s_addr;
 969 #ifdef INET6
 970                         if (!(inp->inp_vflag & INP_IPV4))
 971                                 continue;
 972 #endif
 973                         if (inp->inp_socket != NULL)
 974                                 cred = inp->inp_socket->so_cred;
 975                         else
 976                                 cred = NULL;
 977                         if (cred != NULL && jailed(cred)) {
 978                                 if (jinp != NULL)
 979                                         continue;
 980                                 else
 981                                         if (!jailed_ip(cred->cr_prison,
 982                                             (struct sockaddr *)&jsin))
 983                                                 continue;
 984                         }
 985                         if (inp->inp_lport == lport) {
 986                                 if (ifp && ifp->if_type == IFT_FAITH &&
 987                                     !(inp->inp_flags & INP_FAITH))
 988                                         continue;
 989                                 if (inp->inp_laddr.s_addr == laddr.s_addr) {
 990                                         if (cred != NULL && jailed(cred))
 991                                                 jinp = inp;
 992                                         else
 993                                                 return (inp);
 994                                 }
 995                                 if (inp->inp_laddr.s_addr == INADDR_ANY) {
 996 #ifdef INET6
 997                                         if (INP_CHECK_SOCKAF(inp->inp_socket,
 998                                                              AF_INET6))
 999                                                 local_wild_mapped = inp;
1000                                         else
1001 #endif
1002                                                 if (cred != NULL &&
1003                                                     jailed(cred))
1004                                                         jinp_wild = inp;
1005                                                 else
1006                                                         local_wild = inp;
1007                                 }
1008                         }
1009                 }
1010                 if (local_wild != NULL)
1011                         return (local_wild);
1012 #ifdef INET6
1013                 if (local_wild_mapped != NULL)
1014                         return (local_wild_mapped);
1015 #endif
1016                 if (jinp != NULL)
1017                         return (jinp);
1018                 return (jinp_wild);
1019         }
1020
1021         /*
1022          * Not found.
1023          */
1024         return (NULL);
1025 }
1026
1027 /*
1028  * Insert PCB into connection hash table.
1029  */
1030 void
1031 in_pcbinsconnhash(struct inpcb *inp)
1032 {
1033         struct inpcbinfo *pcbinfo = inp->inp_cpcbinfo;
1034         struct inpcbhead *bucket;
1035         u_int32_t hashkey_faddr, hashkey_laddr;
1036
1037 #ifdef INET6
1038         if (inp->inp_vflag & INP_IPV6) {
1039                 hashkey_faddr = inp->in6p_faddr.s6_addr32[3] /* XXX JH */;
1040                 hashkey_laddr = inp->in6p_laddr.s6_addr32[3] /* XXX JH */;
1041         } else {
1042 #endif
1043                 hashkey_faddr = inp->inp_faddr.s_addr;
1044                 hashkey_laddr = inp->inp_laddr.s_addr;
1045 #ifdef INET6
1046         }
1047 #endif
1048
1049         KASSERT(!(inp->inp_flags & INP_CONNECTED), ("already on hash list"));
1050         inp->inp_flags |= INP_CONNECTED;
1051
1052         /*
1053          * Insert into the connection hash table.
1054          */
1055         bucket = &pcbinfo->hashbase[INP_PCBCONNHASH(hashkey_faddr,
1056             inp->inp_fport, hashkey_laddr, inp->inp_lport, pcbinfo->hashmask)];
1057         LIST_INSERT_HEAD(bucket, inp, inp_hash);
1058 }
1059
1060 /*
1061  * Remove PCB from connection hash table.
1062  */
1063 void
1064 in_pcbremconnhash(struct inpcb *inp)
1065 {
1066         KASSERT(inp->inp_flags & INP_CONNECTED, ("inp not connected"));
1067         LIST_REMOVE(inp, inp_hash);
1068         inp->inp_flags &= ~INP_CONNECTED;
1069 }
1070
1071 /*
1072  * Insert PCB into port hash table.
1073  */
1074 int
1075 in_pcbinsporthash(struct inpcb *inp)
1076 {
1077         struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
1078         struct inpcbporthead *pcbporthash;
1079         struct inpcbport *phd;
1080
1081         /*
1082          * Insert into the port hash table.
1083          */
1084         pcbporthash = &pcbinfo->porthashbase[
1085             INP_PCBPORTHASH(inp->inp_lport, pcbinfo->porthashmask)];
1086
1087         /* Go through port list and look for a head for this lport. */
1088         LIST_FOREACH(phd, pcbporthash, phd_hash)
1089                 if (phd->phd_port == inp->inp_lport)
1090                         break;
1091
1092         /* If none exists, malloc one and tack it on. */
1093         if (phd == NULL) {
1094                 MALLOC(phd, struct inpcbport *, sizeof(struct inpcbport),
1095                     M_PCB, M_INTWAIT | M_NULLOK);
1096                 if (phd == NULL)
1097                         return (ENOBUFS); /* XXX */
1098                 phd->phd_port = inp->inp_lport;
1099                 LIST_INIT(&phd->phd_pcblist);
1100                 LIST_INSERT_HEAD(pcbporthash, phd, phd_hash);
1101         }
1102
1103         inp->inp_phd = phd;
1104         LIST_INSERT_HEAD(&phd->phd_pcblist, inp, inp_portlist);
1105
1106         return (0);
1107 }
1108
1109 void
1110 in_pcbinswildcardhash_oncpu(struct inpcb *inp, struct inpcbinfo *pcbinfo)
1111 {
1112         struct inpcontainer *ic;
1113         struct inpcontainerhead *bucket;
1114
1115         bucket = &pcbinfo->wildcardhashbase[
1116             INP_PCBWILDCARDHASH(inp->inp_lport, pcbinfo->wildcardhashmask)];
1117
1118         ic = kmalloc(sizeof(struct inpcontainer), M_TEMP, M_INTWAIT);
1119         ic->ic_inp = inp;
1120         LIST_INSERT_HEAD(bucket, ic, ic_list);
1121 }
1122
1123 /*
1124  * Insert PCB into wildcard hash table.
1125  */
1126 void
1127 in_pcbinswildcardhash(struct inpcb *inp)
1128 {
1129         struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
1130
1131         KKASSERT(pcbinfo != NULL);
1132
1133         in_pcbinswildcardhash_oncpu(inp, pcbinfo);
1134         inp->inp_flags |= INP_WILDCARD;
1135 }
1136
1137 void
1138 in_pcbremwildcardhash_oncpu(struct inpcb *inp, struct inpcbinfo *pcbinfo)
1139 {
1140         struct inpcontainer *ic;
1141         struct inpcontainerhead *head;
1142
1143         /* find bucket */
1144         head = &pcbinfo->wildcardhashbase[
1145             INP_PCBWILDCARDHASH(inp->inp_lport, pcbinfo->wildcardhashmask)];
1146
1147         LIST_FOREACH(ic, head, ic_list) {
1148                 if (ic->ic_inp == inp)
1149                         goto found;
1150         }
1151         return;                 /* not found! */
1152
1153 found:
1154         LIST_REMOVE(ic, ic_list);       /* remove container from bucket chain */
1155         kfree(ic, M_TEMP);              /* deallocate container */
1156 }
1157
1158 /*
1159  * Remove PCB from wildcard hash table.
1160  */
1161 void
1162 in_pcbremwildcardhash(struct inpcb *inp)
1163 {
1164         struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
1165
1166         KASSERT(inp->inp_flags & INP_WILDCARD, ("inp not wildcard"));
1167         in_pcbremwildcardhash_oncpu(inp, pcbinfo);
1168         inp->inp_flags &= ~INP_WILDCARD;
1169 }
1170
1171 /*
1172  * Remove PCB from various lists.
1173  */
1174 void
1175 in_pcbremlists(struct inpcb *inp)
1176 {
1177         if (inp->inp_lport) {
1178                 struct inpcbport *phd = inp->inp_phd;
1179
1180                 LIST_REMOVE(inp, inp_portlist);
1181                 if (LIST_FIRST(&phd->phd_pcblist) == NULL) {
1182                         LIST_REMOVE(phd, phd_hash);
1183                         kfree(phd, M_PCB);
1184                 }
1185         }
1186         if (inp->inp_flags & INP_WILDCARD) {
1187                 in_pcbremwildcardhash(inp);
1188         } else if (inp->inp_flags & INP_CONNECTED) {
1189                 in_pcbremconnhash(inp);
1190         }
1191         LIST_REMOVE(inp, inp_list);
1192         inp->inp_pcbinfo->ipi_count--;
1193 }
1194
1195 int
1196 prison_xinpcb(struct thread *td, struct inpcb *inp)
1197 {
1198         struct ucred *cr;
1199
1200         if (td->td_proc == NULL)
1201                 return (0);
1202         cr = td->td_proc->p_ucred;
1203         if (cr->cr_prison == NULL)
1204                 return (0);
1205         if (inp->inp_socket && inp->inp_socket->so_cred &&
1206             inp->inp_socket->so_cred->cr_prison &&
1207             cr->cr_prison == inp->inp_socket->so_cred->cr_prison)
1208                 return (0);
1209         return (1);
1210 }
1211
1212 int
1213 in_pcblist_global(SYSCTL_HANDLER_ARGS)
1214 {
1215         struct inpcbinfo *pcbinfo = arg1;
1216         struct inpcb *inp, *marker;
1217         struct xinpcb xi;
1218         int error, i, n;
1219         inp_gen_t gencnt;
1220
1221         /*
1222          * The process of preparing the TCB list is too time-consuming and
1223          * resource-intensive to repeat twice on every request.
1224          */
1225         if (req->oldptr == NULL) {
1226                 n = pcbinfo->ipi_count;
1227                 req->oldidx = (n + n/8 + 10) * sizeof(struct xinpcb);
1228                 return 0;
1229         }
1230
1231         if (req->newptr != NULL)
1232                 return EPERM;
1233
1234         /*
1235          * OK, now we're committed to doing something.  Re-fetch ipi_count
1236          * after obtaining the generation count.
1237          */
1238         gencnt = pcbinfo->ipi_gencnt;
1239         n = pcbinfo->ipi_count;
1240
1241         marker = kmalloc(sizeof(struct inpcb), M_TEMP, M_WAITOK|M_ZERO);
1242         marker->inp_flags |= INP_PLACEMARKER;
1243         LIST_INSERT_HEAD(&pcbinfo->pcblisthead, marker, inp_list);
1244
1245         i = 0;
1246         error = 0;
1247
1248         while ((inp = LIST_NEXT(marker, inp_list)) != NULL && i < n) {
1249                 LIST_REMOVE(marker, inp_list);
1250                 LIST_INSERT_AFTER(inp, marker, inp_list);
1251
1252                 if (inp->inp_flags & INP_PLACEMARKER)
1253                         continue;
1254                 if (inp->inp_gencnt > gencnt)
1255                         continue;
1256                 if (prison_xinpcb(req->td, inp))
1257                         continue;
1258                 bzero(&xi, sizeof xi);
1259                 xi.xi_len = sizeof xi;
1260                 bcopy(inp, &xi.xi_inp, sizeof *inp);
1261                 if (inp->inp_socket)
1262                         sotoxsocket(inp->inp_socket, &xi.xi_socket);
1263                 if ((error = SYSCTL_OUT(req, &xi, sizeof xi)) != 0)
1264                         break;
1265                 ++i;
1266         }
1267         LIST_REMOVE(marker, inp_list);
1268         if (error == 0 && i < n) {
1269                 bzero(&xi, sizeof xi);
1270                 xi.xi_len = sizeof xi;
1271                 while (i < n) {
1272                         error = SYSCTL_OUT(req, &xi, sizeof xi);
1273                         ++i;
1274                 }
1275         }
1276         kfree(marker, M_TEMP);
1277         return(error);
1278 }