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. Neither the name of the University nor the names of its contributors
  47  *    may be used to endorse or promote products derived from this software
  48  *    without specific prior written permission.
  49  *
  50  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  51  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  52  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  53  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  54  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  55  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  56  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  57  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  58  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  59  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  60  * SUCH DAMAGE.
  61  *
  62  *      @(#)in_pcb.c    8.4 (Berkeley) 5/24/95
  63  * $FreeBSD: src/sys/netinet/in_pcb.c,v 1.59.2.27 2004/01/02 04:06:42 ambrisko Exp $
  64  */
  65
  66 #include "opt_ipsec.h"
  67 #include "opt_inet6.h"
  68
  69 #include <sys/param.h>
  70 #include <sys/systm.h>
  71 #include <sys/malloc.h>
  72 #include <sys/mbuf.h>
  73 #include <sys/domain.h>
  74 #include <sys/protosw.h>
  75 #include <sys/socket.h>
  76 #include <sys/socketvar.h>
  77 #include <sys/proc.h>
  78 #include <sys/priv.h>
  79 #include <sys/jail.h>
  80 #include <sys/kernel.h>
  81 #include <sys/sysctl.h>
  82
  83 #include <sys/thread2.h>
  84 #include <sys/socketvar2.h>
  85 #include <sys/msgport2.h>
  86
  87 #include <machine/limits.h>
  88
  89 #include <net/if.h>
  90 #include <net/if_types.h>
  91 #include <net/route.h>
  92
  93 #include <netinet/in.h>
  94 #include <netinet/in_pcb.h>
  95 #include <netinet/in_var.h>
  96 #include <netinet/ip_var.h>
  97 #ifdef INET6
  98 #include <netinet/ip6.h>
  99 #include <netinet6/ip6_var.h>
 100 #endif /* INET6 */
 101
 102 #ifdef IPSEC
 103 #include <netinet6/ipsec.h>
 104 #include <netproto/key/key.h>
 105 #include <netproto/ipsec/esp_var.h>
 106 #endif
 107
 108 #ifdef FAST_IPSEC
 109 #if defined(IPSEC) || defined(IPSEC_ESP)
 110 #error "Bad idea: don't compile with both IPSEC and FAST_IPSEC!"
 111 #endif
 112
 113 #include <netproto/ipsec/ipsec.h>
 114 #include <netproto/ipsec/key.h>
 115 #define IPSEC
 116 #endif /* FAST_IPSEC */
 117
 118 #define INP_LOCALGROUP_SIZMIN   8
 119 #define INP_LOCALGROUP_SIZMAX   256
 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 int udpencap_enable = 1;        /* enabled by default */
 141 int udpencap_port = 4500;       /* triggers decapsulation */
 142
 143 static int
 144 sysctl_net_ipport_check(SYSCTL_HANDLER_ARGS)
 145 {
 146         int error;
 147
 148         error = sysctl_handle_int(oidp, oidp->oid_arg1, oidp->oid_arg2, req);
 149         if (!error) {
 150                 RANGECHK(ipport_lowfirstauto, 1, IPPORT_RESERVED - 1);
 151                 RANGECHK(ipport_lowlastauto, 1, IPPORT_RESERVED - 1);
 152
 153                 RANGECHK(ipport_firstauto, IPPORT_RESERVED, USHRT_MAX);
 154                 RANGECHK(ipport_lastauto, IPPORT_RESERVED, USHRT_MAX);
 155
 156                 RANGECHK(ipport_hifirstauto, IPPORT_RESERVED, USHRT_MAX);
 157                 RANGECHK(ipport_hilastauto, IPPORT_RESERVED, USHRT_MAX);
 158         }
 159         return (error);
 160 }
 161
 162 #undef RANGECHK
 163
 164 SYSCTL_NODE(_net_inet_ip, IPPROTO_IP, portrange, CTLFLAG_RW, 0, "IP Ports");
 165
 166 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, lowfirst, CTLTYPE_INT|CTLFLAG_RW,
 167            &ipport_lowfirstauto, 0, &sysctl_net_ipport_check, "I", "");
 168 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, lowlast, CTLTYPE_INT|CTLFLAG_RW,
 169            &ipport_lowlastauto, 0, &sysctl_net_ipport_check, "I", "");
 170 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, first, CTLTYPE_INT|CTLFLAG_RW,
 171            &ipport_firstauto, 0, &sysctl_net_ipport_check, "I", "");
 172 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, last, CTLTYPE_INT|CTLFLAG_RW,
 173            &ipport_lastauto, 0, &sysctl_net_ipport_check, "I", "");
 174 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, hifirst, CTLTYPE_INT|CTLFLAG_RW,
 175            &ipport_hifirstauto, 0, &sysctl_net_ipport_check, "I", "");
 176 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, hilast, CTLTYPE_INT|CTLFLAG_RW,
 177            &ipport_hilastauto, 0, &sysctl_net_ipport_check, "I", "");
 178
 179 /*
 180  * in_pcb.c: manage the Protocol Control Blocks.
 181  *
 182  * NOTE: It is assumed that most of these functions will be called from
 183  * a critical section.  XXX - There are, unfortunately, a few exceptions
 184  * to this rule that should be fixed.
 185  *
 186  * NOTE: The caller should initialize the cpu field to the cpu running the
 187  * protocol stack associated with this inpcbinfo.
 188  */
 189
 190 void
 191 in_pcbinfo_init(struct inpcbinfo *pcbinfo)
 192 {
 193         LIST_INIT(&pcbinfo->pcblisthead);
 194         pcbinfo->cpu = -1;
 195         pcbinfo->portsave = kmalloc(sizeof(*pcbinfo->portsave), M_PCB,
 196                                     M_WAITOK | M_ZERO);
 197 }
 198
 199 struct baddynamicports baddynamicports;
 200
 201 /*
 202  * Check if the specified port is invalid for dynamic allocation.
 203  */
 204 int
 205 in_baddynamic(u_int16_t port, u_int16_t proto)
 206 {
 207         switch (proto) {
 208         case IPPROTO_TCP:
 209                 return (DP_ISSET(baddynamicports.tcp, port));
 210         case IPPROTO_UDP:
 211 #ifdef IPSEC
 212                 /* Cannot preset this as it is a sysctl */
 213                 if (port == udpencap_port)
 214                         return (1);
 215 #endif
 216                 return (DP_ISSET(baddynamicports.udp, port));
 217         default:
 218                 return (0);
 219         }
 220 }
 221
 222
 223 /*
 224  * Allocate a PCB and associate it with the socket.
 225  */
 226 int
 227 in_pcballoc(struct socket *so, struct inpcbinfo *pcbinfo)
 228 {
 229         struct inpcb *inp;
 230 #ifdef IPSEC
 231         int error;
 232 #endif
 233
 234         inp = kmalloc(pcbinfo->ipi_size, M_PCB, M_WAITOK|M_ZERO|M_NULLOK);
 235         if (inp == NULL)
 236                 return (ENOMEM);
 237         inp->inp_gencnt = ++pcbinfo->ipi_gencnt;
 238         inp->inp_pcbinfo = inp->inp_cpcbinfo = pcbinfo;
 239         inp->inp_socket = so;
 240 #ifdef IPSEC
 241         error = ipsec_init_policy(so, &inp->inp_sp);
 242         if (error != 0) {
 243                 kfree(inp, M_PCB);
 244                 return (error);
 245         }
 246 #endif
 247 #ifdef INET6
 248         if (INP_SOCKAF(so) == AF_INET6 && ip6_v6only)
 249                 inp->inp_flags |= IN6P_IPV6_V6ONLY;
 250         if (ip6_auto_flowlabel)
 251                 inp->inp_flags |= IN6P_AUTOFLOWLABEL;
 252 #endif
 253         soreference(so);
 254         so->so_pcb = inp;
 255         LIST_INSERT_HEAD(&pcbinfo->pcblisthead, inp, inp_list);
 256         pcbinfo->ipi_count++;
 257         return (0);
 258 }
 259
 260 /*
 261  * Unlink a pcb with the intention of moving it to another cpu with a
 262  * different pcbinfo.  While unlinked nothing should attempt to dereference
 263  * inp_pcbinfo, NULL it out so we assert if it does.
 264  */
 265 void
 266 in_pcbunlink(struct inpcb *inp, struct inpcbinfo *pcbinfo)
 267 {
 268         KASSERT(inp->inp_pcbinfo == pcbinfo, ("pcbinfo mismatch"));
 269         KASSERT(inp->inp_cpcbinfo == pcbinfo, ("cpcbinfo mismatch"));
 270         KASSERT((inp->inp_flags & (INP_WILDCARD | INP_CONNECTED)) == 0,
 271             ("already linked"));
 272
 273         LIST_REMOVE(inp, inp_list);
 274         pcbinfo->ipi_count--;
 275         inp->inp_pcbinfo = NULL;
 276         inp->inp_cpcbinfo = NULL;
 277 }
 278
 279 /*
 280  * Relink a pcb into a new pcbinfo.
 281  */
 282 void
 283 in_pcblink(struct inpcb *inp, struct inpcbinfo *pcbinfo)
 284 {
 285         KASSERT(inp->inp_pcbinfo == NULL, ("has pcbinfo"));
 286         KASSERT(inp->inp_cpcbinfo == NULL, ("has cpcbinfo"));
 287         KASSERT((inp->inp_flags & (INP_WILDCARD | INP_CONNECTED)) == 0,
 288             ("already linked"));
 289
 290         inp->inp_cpcbinfo = pcbinfo;
 291         inp->inp_pcbinfo = pcbinfo;
 292         LIST_INSERT_HEAD(&pcbinfo->pcblisthead, inp, inp_list);
 293         pcbinfo->ipi_count++;
 294 }
 295
 296 static int
 297 in_pcbsetlport(struct inpcb *inp, int wild, struct ucred *cred)
 298 {
 299         struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
 300         struct inpcbportinfo *portinfo;
 301         u_short first, last, lport, step;
 302         u_short *lastport;
 303         int count, error;
 304         int portinfo_first, portinfo_idx;
 305
 306         inp->inp_flags |= INP_ANONPORT;
 307
 308         step = pcbinfo->portinfo_mask + 1;
 309         portinfo_first = mycpuid & pcbinfo->portinfo_mask;
 310         portinfo_idx = portinfo_first;
 311 loop:
 312         portinfo = &pcbinfo->portinfo[portinfo_idx];
 313
 314         if (inp->inp_flags & INP_HIGHPORT) {
 315                 first = ipport_hifirstauto;     /* sysctl */
 316                 last  = ipport_hilastauto;
 317                 lastport = &portinfo->lasthi;
 318         } else if (inp->inp_flags & INP_LOWPORT) {
 319                 if (cred &&
 320                     (error =
 321                      priv_check_cred(cred, PRIV_NETINET_RESERVEDPORT, 0))) {
 322                         inp->inp_laddr.s_addr = INADDR_ANY;
 323                         return error;
 324                 }
 325                 first = ipport_lowfirstauto;    /* 1023 */
 326                 last  = ipport_lowlastauto;     /* 600 */
 327                 lastport = &portinfo->lastlow;
 328         } else {
 329                 first = ipport_firstauto;       /* sysctl */
 330                 last  = ipport_lastauto;
 331                 lastport = &portinfo->lastport;
 332         }
 333
 334         /*
 335          * This has to be atomic.  If the porthash is shared across multiple
 336          * protocol threads (aka tcp) then the token must be held.
 337          */
 338         GET_PORT_TOKEN(portinfo);
 339
 340         /*
 341          * Simple check to ensure all ports are not used up causing
 342          * a deadlock here.
 343          *
 344          * We split the two cases (up and down) so that the direction
 345          * is not being tested on each round of the loop.
 346          */
 347         if (first > last) {
 348                 /*
 349                  * counting down
 350                  */
 351                 in_pcbportrange(&first, &last, portinfo->offset, step);
 352                 count = (first - last) / step;
 353
 354                 do {
 355                         if (count-- < 0) {      /* completely used? */
 356                                 error = EADDRNOTAVAIL;
 357                                 goto done;
 358                         }
 359                         *lastport -= step;
 360                         if (*lastport > first || *lastport < last)
 361                                 *lastport = first;
 362                         KKASSERT((*lastport & pcbinfo->portinfo_mask) ==
 363                             portinfo->offset);
 364                         lport = htons(*lastport);
 365                 } while (in_pcblookup_local(portinfo, inp->inp_laddr, lport,
 366                     wild, cred));
 367         } else {
 368                 /*
 369                  * counting up
 370                  */
 371                 in_pcbportrange(&last, &first, portinfo->offset, step);
 372                 count = (last - first) / step;
 373
 374                 do {
 375                         if (count-- < 0) {      /* completely used? */
 376                                 error = EADDRNOTAVAIL;
 377                                 goto done;
 378                         }
 379                         *lastport += step;
 380                         if (*lastport < first || *lastport > last)
 381                                 *lastport = first;
 382                         KKASSERT((*lastport & pcbinfo->portinfo_mask) ==
 383                             portinfo->offset);
 384                         lport = htons(*lastport);
 385                 } while (in_pcblookup_local(portinfo, inp->inp_laddr, lport,
 386                     wild, cred));
 387         }
 388         inp->inp_lport = lport;
 389         in_pcbinsporthash(portinfo, inp);
 390         error = 0;
 391 done:
 392         REL_PORT_TOKEN(portinfo);
 393
 394         if (error) {
 395                 /* Try next portinfo */
 396                 portinfo_idx++;
 397                 portinfo_idx &= pcbinfo->portinfo_mask;
 398                 if (portinfo_idx != portinfo_first)
 399                         goto loop;
 400                 inp->inp_laddr.s_addr = INADDR_ANY;
 401         }
 402         return error;
 403 }
 404
 405 int
 406 in_pcbbind(struct inpcb *inp, struct sockaddr *nam, struct thread *td)
 407 {
 408         struct socket *so = inp->inp_socket;
 409         struct sockaddr_in jsin;
 410         struct ucred *cred = NULL;
 411         int wild = 0;
 412
 413         if (TAILQ_EMPTY(&in_ifaddrheads[mycpuid])) /* XXX broken! */
 414                 return (EADDRNOTAVAIL);
 415         if (inp->inp_lport != 0 || inp->inp_laddr.s_addr != INADDR_ANY)
 416                 return (EINVAL);        /* already bound */
 417
 418         if (!(so->so_options & (SO_REUSEADDR|SO_REUSEPORT)))
 419                 wild = 1;    /* neither SO_REUSEADDR nor SO_REUSEPORT is set */
 420         if (td->td_proc)
 421                 cred = td->td_proc->p_ucred;
 422
 423         if (nam != NULL) {
 424                 struct sockaddr_in *sin = (struct sockaddr_in *)nam;
 425                 struct inpcbinfo *pcbinfo;
 426                 struct inpcbportinfo *portinfo;
 427                 struct inpcb *t;
 428                 u_short lport, lport_ho;
 429                 int reuseport = (so->so_options & SO_REUSEPORT);
 430                 int error;
 431
 432                 if (nam->sa_len != sizeof *sin)
 433                         return (EINVAL);
 434 #ifdef notdef
 435                 /*
 436                  * We should check the family, but old programs
 437                  * incorrectly fail to initialize it.
 438                  */
 439                 if (sin->sin_family != AF_INET)
 440                         return (EAFNOSUPPORT);
 441 #endif
 442                 if (!prison_replace_wildcards(td, nam))
 443                         return (EINVAL);
 444
 445                 lport = sin->sin_port;
 446                 if (IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
 447                         /*
 448                          * Treat SO_REUSEADDR as SO_REUSEPORT for multicast;
 449                          * allow complete duplication of binding if
 450                          * SO_REUSEPORT is set, or if SO_REUSEADDR is set
 451                          * and a multicast address is bound on both
 452                          * new and duplicated sockets.
 453                          */
 454                         if (so->so_options & SO_REUSEADDR)
 455                                 reuseport = SO_REUSEADDR | SO_REUSEPORT;
 456                 } else if (sin->sin_addr.s_addr != INADDR_ANY) {
 457                         sin->sin_port = 0;              /* yech... */
 458                         bzero(&sin->sin_zero, sizeof sin->sin_zero);
 459                         if (ifa_ifwithaddr((struct sockaddr *)sin) == NULL)
 460                                 return (EADDRNOTAVAIL);
 461                 }
 462
 463                 inp->inp_laddr = sin->sin_addr;
 464
 465                 jsin.sin_family = AF_INET;
 466                 jsin.sin_addr.s_addr = inp->inp_laddr.s_addr;
 467                 if (!prison_replace_wildcards(td, (struct sockaddr *)&jsin)) {
 468                         inp->inp_laddr.s_addr = INADDR_ANY;
 469                         return (EINVAL);
 470                 }
 471                 inp->inp_laddr.s_addr = jsin.sin_addr.s_addr;
 472
 473                 if (lport == 0) {
 474                         /* Auto-select local port */
 475                         return in_pcbsetlport(inp, wild, cred);
 476                 }
 477                 lport_ho = ntohs(lport);
 478
 479                 /* GROSS */
 480                 if (lport_ho < IPPORT_RESERVED && cred &&
 481                     (error =
 482                      priv_check_cred(cred, PRIV_NETINET_RESERVEDPORT, 0))) {
 483                         inp->inp_laddr.s_addr = INADDR_ANY;
 484                         return (error);
 485                 }
 486
 487                 /*
 488                  * Locate the proper portinfo based on lport
 489                  */
 490                 pcbinfo = inp->inp_pcbinfo;
 491                 portinfo =
 492                     &pcbinfo->portinfo[lport_ho & pcbinfo->portinfo_mask];
 493                 KKASSERT((lport_ho & pcbinfo->portinfo_mask) ==
 494                     portinfo->offset);
 495
 496                 /*
 497                  * This has to be atomic.  If the porthash is shared across
 498                  * multiple protocol threads (aka tcp) then the token must
 499                  * be held.
 500                  */
 501                 GET_PORT_TOKEN(portinfo);
 502
 503                 if (so->so_cred->cr_uid != 0 &&
 504                     !IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
 505                         t = in_pcblookup_local(portinfo, sin->sin_addr, lport,
 506                             INPLOOKUP_WILDCARD, cred);
 507                         if (t &&
 508                             (!in_nullhost(sin->sin_addr) ||
 509                              !in_nullhost(t->inp_laddr) ||
 510                              (t->inp_socket->so_options & SO_REUSEPORT) == 0) &&
 511                             (so->so_cred->cr_uid !=
 512                              t->inp_socket->so_cred->cr_uid)) {
 513 #ifdef INET6
 514                                 if (!in_nullhost(sin->sin_addr) ||
 515                                     !in_nullhost(t->inp_laddr) ||
 516                                     INP_SOCKAF(so) == INP_SOCKAF(t->inp_socket))
 517 #endif
 518                                 {
 519                                         inp->inp_laddr.s_addr = INADDR_ANY;
 520                                         error = EADDRINUSE;
 521                                         goto done;
 522                                 }
 523                         }
 524                 }
 525                 if (cred && !prison_replace_wildcards(td, nam)) {
 526                         inp->inp_laddr.s_addr = INADDR_ANY;
 527                         error = EADDRNOTAVAIL;
 528                         goto done;
 529                 }
 530                 t = in_pcblookup_local(portinfo, sin->sin_addr, lport,
 531                     wild, cred);
 532                 if (t && !(reuseport & t->inp_socket->so_options)) {
 533 #ifdef INET6
 534                         if (!in_nullhost(sin->sin_addr) ||
 535                             !in_nullhost(t->inp_laddr) ||
 536                             INP_SOCKAF(so) == INP_SOCKAF(t->inp_socket))
 537 #endif
 538                         {
 539                                 inp->inp_laddr.s_addr = INADDR_ANY;
 540                                 error = EADDRINUSE;
 541                                 goto done;
 542                         }
 543                 }
 544                 inp->inp_lport = lport;
 545                 in_pcbinsporthash(portinfo, inp);
 546                 error = 0;
 547 done:
 548                 REL_PORT_TOKEN(portinfo);
 549                 return (error);
 550         } else {
 551                 jsin.sin_family = AF_INET;
 552                 jsin.sin_addr.s_addr = inp->inp_laddr.s_addr;
 553                 if (!prison_replace_wildcards(td, (struct sockaddr *)&jsin)) {
 554                         inp->inp_laddr.s_addr = INADDR_ANY;
 555                         return (EINVAL);
 556                 }
 557                 inp->inp_laddr.s_addr = jsin.sin_addr.s_addr;
 558
 559                 return in_pcbsetlport(inp, wild, cred);
 560         }
 561 }
 562
 563 static struct inpcb *
 564 in_pcblookup_localremote(struct inpcbportinfo *portinfo, struct in_addr laddr,
 565     u_short lport, struct in_addr faddr, u_short fport, struct ucred *cred)
 566 {
 567         struct inpcb *inp;
 568         struct inpcbporthead *porthash;
 569         struct inpcbport *phd;
 570         struct inpcb *match = NULL;
 571
 572         /*
 573          * If the porthashbase is shared across several cpus, it must
 574          * have been locked.
 575          */
 576         ASSERT_PORT_TOKEN_HELD(portinfo);
 577
 578         /*
 579          * Best fit PCB lookup.
 580          *
 581          * First see if this local port is in use by looking on the
 582          * port hash list.
 583          */
 584         porthash = &portinfo->porthashbase[
 585                         INP_PCBPORTHASH(lport, portinfo->porthashmask)];
 586         LIST_FOREACH(phd, porthash, phd_hash) {
 587                 if (phd->phd_port == lport)
 588                         break;
 589         }
 590         if (phd != NULL) {
 591                 LIST_FOREACH(inp, &phd->phd_pcblist, inp_portlist) {
 592 #ifdef INET6
 593                         if ((inp->inp_vflag & INP_IPV4) == 0)
 594                                 continue;
 595 #endif
 596                         if (inp->inp_laddr.s_addr != INADDR_ANY &&
 597                             inp->inp_laddr.s_addr != laddr.s_addr)
 598                                 continue;
 599
 600                         if (inp->inp_faddr.s_addr != INADDR_ANY &&
 601                             inp->inp_faddr.s_addr != faddr.s_addr)
 602                                 continue;
 603
 604                         if (inp->inp_fport != 0 && inp->inp_fport != fport)
 605                                 continue;
 606
 607                         if (cred == NULL ||
 608                             cred->cr_prison ==
 609                             inp->inp_socket->so_cred->cr_prison) {
 610                                 match = inp;
 611                                 break;
 612                         }
 613                 }
 614         }
 615         return (match);
 616 }
 617
 618 int
 619 in_pcbsetlport_remote(struct inpcb *inp, const struct sockaddr *remote,
 620     struct thread *td)
 621 {
 622         struct proc *p = td->td_proc;
 623         unsigned short *lastport;
 624         const struct sockaddr_in *sin = (const struct sockaddr_in *)remote;
 625         struct sockaddr_in jsin;
 626         struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
 627         struct inpcbportinfo *portinfo;
 628         struct ucred *cred = NULL;
 629         u_short first, last, lport, step;
 630         int count, error, dup;
 631         int portinfo_first, portinfo_idx;
 632
 633         if (TAILQ_EMPTY(&in_ifaddrheads[mycpuid])) /* XXX broken! */
 634                 return (EADDRNOTAVAIL);
 635
 636         KKASSERT(inp->inp_laddr.s_addr != INADDR_ANY);
 637         if (inp->inp_lport != 0)
 638                 return (EINVAL);        /* already bound */
 639
 640         KKASSERT(p);
 641         cred = p->p_ucred;
 642
 643         jsin.sin_family = AF_INET;
 644         jsin.sin_addr.s_addr = inp->inp_laddr.s_addr;
 645         if (!prison_replace_wildcards(td, (struct sockaddr *)&jsin)) {
 646                 inp->inp_laddr.s_addr = INADDR_ANY;
 647                 return (EINVAL);
 648         }
 649         inp->inp_laddr.s_addr = jsin.sin_addr.s_addr;
 650
 651         inp->inp_flags |= INP_ANONPORT;
 652
 653         step = pcbinfo->portinfo_mask + 1;
 654         portinfo_first = mycpuid & pcbinfo->portinfo_mask;
 655         portinfo_idx = portinfo_first;
 656 loop:
 657         portinfo = &pcbinfo->portinfo[portinfo_idx];
 658         dup = 0;
 659
 660         if (inp->inp_flags & INP_HIGHPORT) {
 661                 first = ipport_hifirstauto;     /* sysctl */
 662                 last  = ipport_hilastauto;
 663                 lastport = &portinfo->lasthi;
 664         } else if (inp->inp_flags & INP_LOWPORT) {
 665                 if (cred &&
 666                     (error =
 667                      priv_check_cred(cred, PRIV_NETINET_RESERVEDPORT, 0))) {
 668                         inp->inp_laddr.s_addr = INADDR_ANY;
 669                         return (error);
 670                 }
 671                 first = ipport_lowfirstauto;    /* 1023 */
 672                 last  = ipport_lowlastauto;     /* 600 */
 673                 lastport = &portinfo->lastlow;
 674         } else {
 675                 first = ipport_firstauto;       /* sysctl */
 676                 last  = ipport_lastauto;
 677                 lastport = &portinfo->lastport;
 678         }
 679
 680         /*
 681          * This has to be atomic.  If the porthash is shared across multiple
 682          * protocol threads (aka tcp) then the token must be held.
 683          */
 684         GET_PORT_TOKEN(portinfo);
 685
 686 again:
 687         /*
 688          * Simple check to ensure all ports are not used up causing
 689          * a deadlock here.
 690          *
 691          * We split the two cases (up and down) so that the direction
 692          * is not being tested on each round of the loop.
 693          */
 694         if (first > last) {
 695                 /*
 696                  * counting down
 697                  */
 698                 in_pcbportrange(&first, &last, portinfo->offset, step);
 699                 count = (first - last) / step;
 700
 701                 do {
 702                         if (count-- < 0) {      /* completely used? */
 703                                 error = EADDRNOTAVAIL;
 704                                 goto done;
 705                         }
 706                         *lastport -= step;
 707                         if (*lastport > first || *lastport < last)
 708                                 *lastport = first;
 709                         KKASSERT((*lastport & pcbinfo->portinfo_mask) ==
 710                             portinfo->offset);
 711                         lport = htons(*lastport);
 712                 } while (in_pcblookup_localremote(portinfo, inp->inp_laddr,
 713                     lport, sin->sin_addr, sin->sin_port, cred));
 714         } else {
 715                 /*
 716                  * counting up
 717                  */
 718                 in_pcbportrange(&last, &first, portinfo->offset, step);
 719                 count = (last - first) / step;
 720
 721                 do {
 722                         if (count-- < 0) {      /* completely used? */
 723                                 error = EADDRNOTAVAIL;
 724                                 goto done;
 725                         }
 726                         *lastport += step;
 727                         if (*lastport < first || *lastport > last)
 728                                 *lastport = first;
 729                         KKASSERT((*lastport & pcbinfo->portinfo_mask) ==
 730                             portinfo->offset);
 731                         lport = htons(*lastport);
 732                 } while (in_pcblookup_localremote(portinfo, inp->inp_laddr,
 733                     lport, sin->sin_addr, sin->sin_port, cred));
 734         }
 735
 736         /* This could happen on loopback interface */
 737         if (sin->sin_port == lport &&
 738             sin->sin_addr.s_addr == inp->inp_laddr.s_addr) {
 739                 if (dup) {
 740                         /*
 741                          * Duplicate again; give up
 742                          */
 743                         error = EADDRNOTAVAIL;
 744                         goto done;
 745                 }
 746                 dup = 1;
 747                 goto again;
 748         }
 749         inp->inp_lport = lport;
 750         in_pcbinsporthash(portinfo, inp);
 751         error = 0;
 752 done:
 753         REL_PORT_TOKEN(portinfo);
 754
 755         if (error) {
 756                 /* Try next portinfo */
 757                 portinfo_idx++;
 758                 portinfo_idx &= pcbinfo->portinfo_mask;
 759                 if (portinfo_idx != portinfo_first)
 760                         goto loop;
 761                 inp->inp_laddr.s_addr = INADDR_ANY;
 762         }
 763         return error;
 764 }
 765
 766 /*
 767  *   Transform old in_pcbconnect() into an inner subroutine for new
 768  *   in_pcbconnect(): Do some validity-checking on the remote
 769  *   address (in mbuf 'nam') and then determine local host address
 770  *   (i.e., which interface) to use to access that remote host.
 771  *
 772  *   This preserves definition of in_pcbconnect(), while supporting a
 773  *   slightly different version for T/TCP.  (This is more than
 774  *   a bit of a kludge, but cleaning up the internal interfaces would
 775  *   have forced minor changes in every protocol).
 776  */
 777 int
 778 in_pcbladdr_find(struct inpcb *inp, struct sockaddr *nam,
 779     struct sockaddr_in **plocal_sin, struct thread *td, int find)
 780 {
 781         struct in_ifaddr *ia;
 782         struct ucred *cred = NULL;
 783         struct sockaddr_in *sin = (struct sockaddr_in *)nam;
 784         struct sockaddr *jsin;
 785         int jailed = 0, alloc_route = 0;
 786
 787         if (nam->sa_len != sizeof *sin)
 788                 return (EINVAL);
 789         if (sin->sin_family != AF_INET)
 790                 return (EAFNOSUPPORT);
 791         if (sin->sin_port == 0)
 792                 return (EADDRNOTAVAIL);
 793         if (td && td->td_proc && td->td_proc->p_ucred)
 794                 cred = td->td_proc->p_ucred;
 795         if (cred && cred->cr_prison)
 796                 jailed = 1;
 797         if (!TAILQ_EMPTY(&in_ifaddrheads[mycpuid])) {
 798                 ia = TAILQ_FIRST(&in_ifaddrheads[mycpuid])->ia;
 799                 /*
 800                  * If the destination address is INADDR_ANY,
 801                  * use the primary local address.
 802                  * If the supplied address is INADDR_BROADCAST,
 803                  * and the primary interface supports broadcast,
 804                  * choose the broadcast address for that interface.
 805                  */
 806                 if (sin->sin_addr.s_addr == INADDR_ANY)
 807                         sin->sin_addr = IA_SIN(ia)->sin_addr;
 808                 else if (sin->sin_addr.s_addr == (u_long)INADDR_BROADCAST &&
 809                     (ia->ia_ifp->if_flags & IFF_BROADCAST))
 810                         sin->sin_addr = satosin(&ia->ia_broadaddr)->sin_addr;
 811         }
 812         if (find) {
 813                 struct route *ro;
 814
 815                 ia = NULL;
 816                 /*
 817                  * If route is known or can be allocated now,
 818                  * our src addr is taken from the i/f, else punt.
 819                  * Note that we should check the address family of the cached
 820                  * destination, in case of sharing the cache with IPv6.
 821                  */
 822                 ro = &inp->inp_route;
 823                 if (ro->ro_rt &&
 824                     (!(ro->ro_rt->rt_flags & RTF_UP) ||
 825                      ro->ro_dst.sa_family != AF_INET ||
 826                      satosin(&ro->ro_dst)->sin_addr.s_addr !=
 827                                       sin->sin_addr.s_addr ||
 828                      inp->inp_socket->so_options & SO_DONTROUTE)) {
 829                         RTFREE(ro->ro_rt);
 830                         ro->ro_rt = NULL;
 831                 }
 832                 if (!(inp->inp_socket->so_options & SO_DONTROUTE) && /*XXX*/
 833                     (ro->ro_rt == NULL ||
 834                     ro->ro_rt->rt_ifp == NULL)) {
 835                         /* No route yet, so try to acquire one */
 836                         bzero(&ro->ro_dst, sizeof(struct sockaddr_in));
 837                         ro->ro_dst.sa_family = AF_INET;
 838                         ro->ro_dst.sa_len = sizeof(struct sockaddr_in);
 839                         ((struct sockaddr_in *) &ro->ro_dst)->sin_addr =
 840                                 sin->sin_addr;
 841                         rtalloc(ro);
 842                         alloc_route = 1;
 843                 }
 844                 /*
 845                  * If we found a route, use the address
 846                  * corresponding to the outgoing interface
 847                  * unless it is the loopback (in case a route
 848                  * to our address on another net goes to loopback).
 849                  */
 850                 if (ro->ro_rt &&
 851                     !(ro->ro_rt->rt_ifp->if_flags & IFF_LOOPBACK)) {
 852                         if (jailed) {
 853                                 if (jailed_ip(cred->cr_prison,
 854                                     ro->ro_rt->rt_ifa->ifa_addr)) {
 855                                         ia = ifatoia(ro->ro_rt->rt_ifa);
 856                                 }
 857                         } else {
 858                                 ia = ifatoia(ro->ro_rt->rt_ifa);
 859                         }
 860                 }
 861                 if (ia == NULL) {
 862                         u_short fport = sin->sin_port;
 863
 864                         sin->sin_port = 0;
 865                         ia = ifatoia(ifa_ifwithdstaddr(sintosa(sin)));
 866                         if (ia && jailed && !jailed_ip(cred->cr_prison,
 867                             sintosa(&ia->ia_addr)))
 868                                 ia = NULL;
 869                         if (ia == NULL)
 870                                 ia = ifatoia(ifa_ifwithnet(sintosa(sin)));
 871                         if (ia && jailed && !jailed_ip(cred->cr_prison,
 872                             sintosa(&ia->ia_addr)))
 873                                 ia = NULL;
 874                         sin->sin_port = fport;
 875                         if (ia == NULL &&
 876                             !TAILQ_EMPTY(&in_ifaddrheads[mycpuid]))
 877                                 ia = TAILQ_FIRST(&in_ifaddrheads[mycpuid])->ia;
 878                         if (ia && jailed && !jailed_ip(cred->cr_prison,
 879                             sintosa(&ia->ia_addr)))
 880                                 ia = NULL;
 881
 882                         if (!jailed && ia == NULL)
 883                                 goto fail;
 884                 }
 885                 /*
 886                  * If the destination address is multicast and an outgoing
 887                  * interface has been set as a multicast option, use the
 888                  * address of that interface as our source address.
 889                  */
 890                 if (!jailed && IN_MULTICAST(ntohl(sin->sin_addr.s_addr)) &&
 891                     inp->inp_moptions != NULL) {
 892                         struct ip_moptions *imo;
 893                         struct ifnet *ifp;
 894
 895                         imo = inp->inp_moptions;
 896                         if (imo->imo_multicast_ifp != NULL) {
 897                                 struct in_ifaddr_container *iac;
 898
 899                                 ifp = imo->imo_multicast_ifp;
 900                                 ia = NULL;
 901                                 TAILQ_FOREACH(iac,
 902                                 &in_ifaddrheads[mycpuid], ia_link) {
 903                                         if (iac->ia->ia_ifp == ifp) {
 904                                                 ia = iac->ia;
 905                                                 break;
 906                                         }
 907                                 }
 908                                 if (ia == NULL)
 909                                         goto fail;
 910                         }
 911                 }
 912                 /*
 913                  * Don't do pcblookup call here; return interface in plocal_sin
 914                  * and exit to caller, that will do the lookup.
 915                  */
 916                 if (ia == NULL && jailed) {
 917                         if ((jsin = prison_get_nonlocal(
 918                                 cred->cr_prison, AF_INET, NULL)) != NULL ||
 919                             (jsin = prison_get_local(
 920                                 cred->cr_prison, AF_INET, NULL)) != NULL) {
 921                                 *plocal_sin = satosin(jsin);
 922                         } else {
 923                                 /* IPv6 only Jail */
 924                                 goto fail;
 925                         }
 926                 } else {
 927                         *plocal_sin = &ia->ia_addr;
 928                 }
 929         }
 930         return (0);
 931 fail:
 932         if (alloc_route) {
 933                 struct route *ro = &inp->inp_route;
 934
 935                 if (ro->ro_rt != NULL)
 936                         RTFREE(ro->ro_rt);
 937                 bzero(ro, sizeof(*ro));
 938         }
 939         return (EADDRNOTAVAIL);
 940 }
 941
 942 int
 943 in_pcbladdr(struct inpcb *inp, struct sockaddr *nam,
 944     struct sockaddr_in **plocal_sin, struct thread *td)
 945 {
 946         return in_pcbladdr_find(inp, nam, plocal_sin, td,
 947             (inp->inp_laddr.s_addr == INADDR_ANY));
 948 }
 949
 950 /*
 951  * Outer subroutine:
 952  * Connect from a socket to a specified address.
 953  * Both address and port must be specified in argument sin.
 954  * If don't have a local address for this socket yet,
 955  * then pick one.
 956  */
 957 int
 958 in_pcbconnect(struct inpcb *inp, struct sockaddr *nam, struct thread *td)
 959 {
 960         struct sockaddr_in *if_sin;
 961         struct sockaddr_in *sin = (struct sockaddr_in *)nam;
 962         int error;
 963
 964         /* Call inner routine to assign local interface address. */
 965         if ((error = in_pcbladdr(inp, nam, &if_sin, td)) != 0)
 966                 return (error);
 967
 968         if (in_pcblookup_hash(inp->inp_cpcbinfo, sin->sin_addr, sin->sin_port,
 969                               inp->inp_laddr.s_addr ?
 970                                 inp->inp_laddr : if_sin->sin_addr,
 971                               inp->inp_lport, FALSE, NULL) != NULL) {
 972                 return (EADDRINUSE);
 973         }
 974         if (inp->inp_laddr.s_addr == INADDR_ANY) {
 975                 if (inp->inp_lport == 0) {
 976                         error = in_pcbbind(inp, NULL, td);
 977                         if (error)
 978                                 return (error);
 979                 }
 980                 inp->inp_laddr = if_sin->sin_addr;
 981         }
 982         inp->inp_faddr = sin->sin_addr;
 983         inp->inp_fport = sin->sin_port;
 984         in_pcbinsconnhash(inp);
 985         return (0);
 986 }
 987
 988 void
 989 in_pcbdisconnect(struct inpcb *inp)
 990 {
 991
 992         inp->inp_faddr.s_addr = INADDR_ANY;
 993         inp->inp_fport = 0;
 994         in_pcbremconnhash(inp);
 995         if (inp->inp_socket->so_state & SS_NOFDREF)
 996                 in_pcbdetach(inp);
 997 }
 998
 999 void
1000 in_pcbdetach(struct inpcb *inp)
1001 {
1002         struct socket *so = inp->inp_socket;
1003         struct inpcbinfo *ipi = inp->inp_pcbinfo;
1004
1005 #ifdef IPSEC
1006         ipsec4_delete_pcbpolicy(inp);
1007 #endif /*IPSEC*/
1008         inp->inp_gencnt = ++ipi->ipi_gencnt;
1009         KKASSERT((so->so_state & SS_ASSERTINPROG) == 0);
1010         in_pcbremlists(inp);
1011         so->so_pcb = NULL;
1012         sofree(so);                     /* remove pcb ref */
1013         if (inp->inp_options)
1014                 m_free(inp->inp_options);
1015         if (inp->inp_route.ro_rt)
1016                 rtfree(inp->inp_route.ro_rt);
1017         ip_freemoptions(inp->inp_moptions);
1018         inp->inp_vflag = 0;
1019         kfree(inp, M_PCB);
1020 }
1021
1022 /*
1023  * The calling convention of in_setsockaddr() and in_setpeeraddr() was
1024  * modified to match the pru_sockaddr() and pru_peeraddr() entry points
1025  * in struct pr_usrreqs, so that protocols can just reference then directly
1026  * without the need for a wrapper function.  The socket must have a valid
1027  * (i.e., non-nil) PCB, but it should be impossible to get an invalid one
1028  * except through a kernel programming error, so it is acceptable to panic
1029  * (or in this case trap) if the PCB is invalid.  (Actually, we don't trap
1030  * because there actually /is/ a programming error somewhere... XXX)
1031  */
1032 int
1033 in_setsockaddr(struct socket *so, struct sockaddr **nam)
1034 {
1035         struct inpcb *inp;
1036         struct sockaddr_in *sin;
1037
1038         /*
1039          * Do the malloc first in case it blocks.
1040          */
1041         sin = kmalloc(sizeof *sin, M_SONAME, M_WAITOK | M_ZERO);
1042         sin->sin_family = AF_INET;
1043         sin->sin_len = sizeof *sin;
1044
1045         crit_enter();
1046         inp = so->so_pcb;
1047         if (!inp) {
1048                 crit_exit();
1049                 kfree(sin, M_SONAME);
1050                 return (ECONNRESET);
1051         }
1052         sin->sin_port = inp->inp_lport;
1053         sin->sin_addr = inp->inp_laddr;
1054         crit_exit();
1055
1056         *nam = (struct sockaddr *)sin;
1057         return (0);
1058 }
1059
1060 void
1061 in_setsockaddr_dispatch(netmsg_t msg)
1062 {
1063         int error;
1064
1065         error = in_setsockaddr(msg->base.nm_so, msg->peeraddr.nm_nam);
1066         lwkt_replymsg(&msg->lmsg, error);
1067 }
1068
1069 int
1070 in_setpeeraddr(struct socket *so, struct sockaddr **nam)
1071 {
1072         struct inpcb *inp;
1073         struct sockaddr_in *sin;
1074
1075         /*
1076          * Do the malloc first in case it blocks.
1077          */
1078         sin = kmalloc(sizeof *sin, M_SONAME, M_WAITOK | M_ZERO);
1079         sin->sin_family = AF_INET;
1080         sin->sin_len = sizeof *sin;
1081
1082         crit_enter();
1083         inp = so->so_pcb;
1084         if (!inp) {
1085                 crit_exit();
1086                 kfree(sin, M_SONAME);
1087                 return (ECONNRESET);
1088         }
1089         sin->sin_port = inp->inp_fport;
1090         sin->sin_addr = inp->inp_faddr;
1091         crit_exit();
1092
1093         *nam = (struct sockaddr *)sin;
1094         return (0);
1095 }
1096
1097 void
1098 in_setpeeraddr_dispatch(netmsg_t msg)
1099 {
1100         int error;
1101
1102         error = in_setpeeraddr(msg->base.nm_so, msg->peeraddr.nm_nam);
1103         lwkt_replymsg(&msg->lmsg, error);
1104 }
1105
1106 void
1107 in_pcbnotifyall(struct inpcbhead *head, struct in_addr faddr, int err,
1108                 void (*notify)(struct inpcb *, int))
1109 {
1110         struct inpcb *inp, *ninp;
1111
1112         /*
1113          * note: if INP_PLACEMARKER is set we must ignore the rest of
1114          * the structure and skip it.
1115          */
1116         crit_enter();
1117         LIST_FOREACH_MUTABLE(inp, head, inp_list, ninp) {
1118                 if (inp->inp_flags & INP_PLACEMARKER)
1119                         continue;
1120 #ifdef INET6
1121                 if (!(inp->inp_vflag & INP_IPV4))
1122                         continue;
1123 #endif
1124                 if (inp->inp_faddr.s_addr != faddr.s_addr ||
1125                     inp->inp_socket == NULL)
1126                         continue;
1127                 (*notify)(inp, err);            /* can remove inp from list! */
1128         }
1129         crit_exit();
1130 }
1131
1132 void
1133 in_pcbpurgeif0(struct inpcb *head, struct ifnet *ifp)
1134 {
1135         struct inpcb *inp;
1136         struct ip_moptions *imo;
1137         int i, gap;
1138
1139         for (inp = head; inp != NULL; inp = LIST_NEXT(inp, inp_list)) {
1140                 if (inp->inp_flags & INP_PLACEMARKER)
1141                         continue;
1142                 imo = inp->inp_moptions;
1143                 if ((inp->inp_vflag & INP_IPV4) && imo != NULL) {
1144                         /*
1145                          * Unselect the outgoing interface if it is being
1146                          * detached.
1147                          */
1148                         if (imo->imo_multicast_ifp == ifp)
1149                                 imo->imo_multicast_ifp = NULL;
1150
1151                         /*
1152                          * Drop multicast group membership if we joined
1153                          * through the interface being detached.
1154                          */
1155                         for (i = 0, gap = 0; i < imo->imo_num_memberships;
1156                             i++) {
1157                                 if (imo->imo_membership[i]->inm_ifp == ifp) {
1158                                         in_delmulti(imo->imo_membership[i]);
1159                                         gap++;
1160                                 } else if (gap != 0)
1161                                         imo->imo_membership[i - gap] =
1162                                             imo->imo_membership[i];
1163                         }
1164                         imo->imo_num_memberships -= gap;
1165                 }
1166         }
1167 }
1168
1169 /*
1170  * Check for alternatives when higher level complains
1171  * about service problems.  For now, invalidate cached
1172  * routing information.  If the route was created dynamically
1173  * (by a redirect), time to try a default gateway again.
1174  */
1175 void
1176 in_losing(struct inpcb *inp)
1177 {
1178         struct rtentry *rt;
1179         struct rt_addrinfo rtinfo;
1180
1181         if ((rt = inp->inp_route.ro_rt)) {
1182                 bzero(&rtinfo, sizeof(struct rt_addrinfo));
1183                 rtinfo.rti_info[RTAX_DST] = rt_key(rt);
1184                 rtinfo.rti_info[RTAX_GATEWAY] = rt->rt_gateway;
1185                 rtinfo.rti_info[RTAX_NETMASK] = rt_mask(rt);
1186                 rtinfo.rti_flags = rt->rt_flags;
1187                 rt_missmsg(RTM_LOSING, &rtinfo, rt->rt_flags, 0);
1188                 if (rt->rt_flags & RTF_DYNAMIC) {
1189                         rtrequest(RTM_DELETE, rt_key(rt), rt->rt_gateway,
1190                             rt_mask(rt), rt->rt_flags, NULL);
1191                 }
1192                 inp->inp_route.ro_rt = NULL;
1193                 rtfree(rt);
1194                 /*
1195                  * A new route can be allocated
1196                  * the next time output is attempted.
1197                  */
1198         }
1199 }
1200
1201 /*
1202  * After a routing change, flush old routing
1203  * and allocate a (hopefully) better one.
1204  */
1205 void
1206 in_rtchange(struct inpcb *inp, int err)
1207 {
1208         if (inp->inp_route.ro_rt) {
1209                 rtfree(inp->inp_route.ro_rt);
1210                 inp->inp_route.ro_rt = NULL;
1211                 /*
1212                  * A new route can be allocated the next time
1213                  * output is attempted.
1214                  */
1215         }
1216 }
1217
1218 /*
1219  * Lookup a PCB based on the local address and port.
1220  */
1221 struct inpcb *
1222 in_pcblookup_local(struct inpcbportinfo *portinfo, struct in_addr laddr,
1223                    u_int lport_arg, int wild_okay, struct ucred *cred)
1224 {
1225         struct inpcb *inp;
1226         int matchwild = 3, wildcard;
1227         u_short lport = lport_arg;
1228         struct inpcbporthead *porthash;
1229         struct inpcbport *phd;
1230         struct inpcb *match = NULL;
1231
1232         /*
1233          * If the porthashbase is shared across several cpus, it must
1234          * have been locked.
1235          */
1236         ASSERT_PORT_TOKEN_HELD(portinfo);
1237
1238         /*
1239          * Best fit PCB lookup.
1240          *
1241          * First see if this local port is in use by looking on the
1242          * port hash list.
1243          */
1244         porthash = &portinfo->porthashbase[
1245                         INP_PCBPORTHASH(lport, portinfo->porthashmask)];
1246         LIST_FOREACH(phd, porthash, phd_hash) {
1247                 if (phd->phd_port == lport)
1248                         break;
1249         }
1250         if (phd != NULL) {
1251                 /*
1252                  * Port is in use by one or more PCBs. Look for best
1253                  * fit.
1254                  */
1255                 LIST_FOREACH(inp, &phd->phd_pcblist, inp_portlist) {
1256                         wildcard = 0;
1257 #ifdef INET6
1258                         if ((inp->inp_vflag & INP_IPV4) == 0)
1259                                 continue;
1260 #endif
1261                         if (inp->inp_faddr.s_addr != INADDR_ANY)
1262                                 wildcard++;
1263                         if (inp->inp_laddr.s_addr != INADDR_ANY) {
1264                                 if (laddr.s_addr == INADDR_ANY)
1265                                         wildcard++;
1266                                 else if (inp->inp_laddr.s_addr != laddr.s_addr)
1267                                         continue;
1268                         } else {
1269                                 if (laddr.s_addr != INADDR_ANY)
1270                                         wildcard++;
1271                         }
1272                         if (wildcard && !wild_okay)
1273                                 continue;
1274                         if (wildcard < matchwild &&
1275                             (cred == NULL ||
1276                              cred->cr_prison ==
1277                                         inp->inp_socket->so_cred->cr_prison)) {
1278                                 match = inp;
1279                                 matchwild = wildcard;
1280                                 if (matchwild == 0) {
1281                                         break;
1282                                 }
1283                         }
1284                 }
1285         }
1286         return (match);
1287 }
1288
1289 struct inpcb *
1290 in_pcblocalgroup_last(const struct inpcbinfo *pcbinfo,
1291     const struct inpcb *inp)
1292 {
1293         const struct inp_localgrphead *hdr;
1294         const struct inp_localgroup *grp;
1295         int i;
1296
1297         if (pcbinfo->localgrphashbase == NULL)
1298                 return NULL;
1299
1300         hdr = &pcbinfo->localgrphashbase[
1301             INP_PCBLOCALGRPHASH(inp->inp_lport, pcbinfo->localgrphashmask)];
1302
1303         LIST_FOREACH(grp, hdr, il_list) {
1304                 if (grp->il_vflag == inp->inp_vflag &&
1305                     grp->il_lport == inp->inp_lport &&
1306                     memcmp(&grp->il_dependladdr,
1307                         &inp->inp_inc.inc_ie.ie_dependladdr,
1308                         sizeof(grp->il_dependladdr)) == 0) {
1309                         break;
1310                 }
1311         }
1312         if (grp == NULL || grp->il_inpcnt == 1)
1313                 return NULL;
1314
1315         KASSERT(grp->il_inpcnt >= 2,
1316             ("invalid localgroup inp count %d", grp->il_inpcnt));
1317         for (i = 0; i < grp->il_inpcnt; ++i) {
1318                 if (grp->il_inp[i] == inp) {
1319                         int last = grp->il_inpcnt - 1;
1320
1321                         if (i == last)
1322                                 last = grp->il_inpcnt - 2;
1323                         return grp->il_inp[last];
1324                 }
1325         }
1326         return NULL;
1327 }
1328
1329 static struct inpcb *
1330 inp_localgroup_lookup(const struct inpcbinfo *pcbinfo,
1331     struct in_addr laddr, uint16_t lport, uint32_t pkt_hash)
1332 {
1333         struct inpcb *local_wild = NULL;
1334         const struct inp_localgrphead *hdr;
1335         const struct inp_localgroup *grp;
1336
1337         hdr = &pcbinfo->localgrphashbase[
1338             INP_PCBLOCALGRPHASH(lport, pcbinfo->localgrphashmask)];
1339 #ifdef INP_LOCALGROUP_HASHTHR
1340         pkt_hash >>= ncpus2_shift;
1341 #endif
1342
1343         /*
1344          * Order of socket selection:
1345          * 1. non-wild.
1346          * 2. wild.
1347          *
1348          * NOTE:
1349          * - Local group does not contain jailed sockets
1350          * - Local group does not contain IPv4 mapped INET6 wild sockets
1351          */
1352         LIST_FOREACH(grp, hdr, il_list) {
1353 #ifdef INET6
1354                 if (!(grp->il_vflag & INP_IPV4))
1355                         continue;
1356 #endif
1357                 if (grp->il_lport == lport) {
1358                         int idx;
1359
1360 #ifdef INP_LOCALGROUP_HASHTHR
1361                         idx = pkt_hash / grp->il_factor;
1362                         KASSERT(idx < grp->il_inpcnt && idx >= 0,
1363                             ("invalid hash %04x, cnt %d or fact %d",
1364                              pkt_hash, grp->il_inpcnt, grp->il_factor));
1365 #else
1366                         /*
1367                          * Modulo-N is used here, which greatly reduces
1368                          * completion queue token contention, thus more
1369                          * cpu time is saved.
1370                          */
1371                         idx = pkt_hash % grp->il_inpcnt;
1372 #endif
1373
1374                         if (grp->il_laddr.s_addr == laddr.s_addr)
1375                                 return grp->il_inp[idx];
1376                         else if (grp->il_laddr.s_addr == INADDR_ANY)
1377                                 local_wild = grp->il_inp[idx];
1378                 }
1379         }
1380         if (local_wild != NULL)
1381                 return local_wild;
1382         return NULL;
1383 }
1384
1385 /*
1386  * Lookup PCB in hash list.
1387  */
1388 struct inpcb *
1389 in_pcblookup_pkthash(struct inpcbinfo *pcbinfo, struct in_addr faddr,
1390     u_int fport_arg, struct in_addr laddr, u_int lport_arg,
1391     boolean_t wildcard, struct ifnet *ifp, const struct mbuf *m)
1392 {
1393         struct inpcbhead *head;
1394         struct inpcb *inp, *jinp=NULL;
1395         u_short fport = fport_arg, lport = lport_arg;
1396
1397         /*
1398          * First look for an exact match.
1399          */
1400         head = &pcbinfo->hashbase[INP_PCBCONNHASH(faddr.s_addr, fport,
1401             laddr.s_addr, lport, pcbinfo->hashmask)];
1402         LIST_FOREACH(inp, head, inp_hash) {
1403 #ifdef INET6
1404                 if (!(inp->inp_vflag & INP_IPV4))
1405                         continue;
1406 #endif
1407                 if (in_hosteq(inp->inp_faddr, faddr) &&
1408                     in_hosteq(inp->inp_laddr, laddr) &&
1409                     inp->inp_fport == fport && inp->inp_lport == lport) {
1410                         /* found */
1411                         if (inp->inp_socket == NULL ||
1412                             inp->inp_socket->so_cred->cr_prison == NULL) {
1413                                 return (inp);
1414                         } else {
1415                                 if  (jinp == NULL)
1416                                         jinp = inp;
1417                         }
1418                 }
1419         }
1420         if (jinp != NULL)
1421                 return (jinp);
1422         if (wildcard) {
1423                 struct inpcb *local_wild = NULL;
1424                 struct inpcb *jinp_wild = NULL;
1425 #ifdef INET6
1426                 struct inpcb *local_wild_mapped = NULL;
1427 #endif
1428                 struct inpcontainer *ic;
1429                 struct inpcontainerhead *chead;
1430                 struct sockaddr_in jsin;
1431                 struct ucred *cred;
1432
1433                 /*
1434                  * Check local group first
1435                  */
1436                 if (pcbinfo->localgrphashbase != NULL &&
1437                     m != NULL && (m->m_flags & M_HASH) &&
1438                     !(ifp && ifp->if_type == IFT_FAITH)) {
1439                         inp = inp_localgroup_lookup(pcbinfo,
1440                             laddr, lport, m->m_pkthdr.hash);
1441                         if (inp != NULL)
1442                                 return inp;
1443                 }
1444
1445                 /*
1446                  * Order of socket selection:
1447                  * 1. non-jailed, non-wild.
1448                  * 2. non-jailed, wild.
1449                  * 3. jailed, non-wild.
1450                  * 4. jailed, wild.
1451                  */
1452                 jsin.sin_family = AF_INET;
1453                 chead = &pcbinfo->wildcardhashbase[
1454                     INP_PCBWILDCARDHASH(lport, pcbinfo->wildcardhashmask)];
1455                 LIST_FOREACH(ic, chead, ic_list) {
1456                         inp = ic->ic_inp;
1457                         jsin.sin_addr.s_addr = laddr.s_addr;
1458 #ifdef INET6
1459                         if (!(inp->inp_vflag & INP_IPV4))
1460                                 continue;
1461 #endif
1462                         if (inp->inp_socket != NULL)
1463                                 cred = inp->inp_socket->so_cred;
1464                         else
1465                                 cred = NULL;
1466                         if (cred != NULL && jailed(cred)) {
1467                                 if (jinp != NULL)
1468                                         continue;
1469                                 else
1470                                         if (!jailed_ip(cred->cr_prison,
1471                                             (struct sockaddr *)&jsin))
1472                                                 continue;
1473                         }
1474                         if (inp->inp_lport == lport) {
1475                                 if (ifp && ifp->if_type == IFT_FAITH &&
1476                                     !(inp->inp_flags & INP_FAITH))
1477                                         continue;
1478                                 if (inp->inp_laddr.s_addr == laddr.s_addr) {
1479                                         if (cred != NULL && jailed(cred))
1480                                                 jinp = inp;
1481                                         else
1482                                                 return (inp);
1483                                 }
1484                                 if (inp->inp_laddr.s_addr == INADDR_ANY) {
1485 #ifdef INET6
1486                                         if (INP_CHECK_SOCKAF(inp->inp_socket,
1487                                                              AF_INET6))
1488                                                 local_wild_mapped = inp;
1489                                         else
1490 #endif
1491                                                 if (cred != NULL &&
1492                                                     jailed(cred))
1493                                                         jinp_wild = inp;
1494                                                 else
1495                                                         local_wild = inp;
1496                                 }
1497                         }
1498                 }
1499                 if (local_wild != NULL)
1500                         return (local_wild);
1501 #ifdef INET6
1502                 if (local_wild_mapped != NULL)
1503                         return (local_wild_mapped);
1504 #endif
1505                 if (jinp != NULL)
1506                         return (jinp);
1507                 return (jinp_wild);
1508         }
1509
1510         /*
1511          * Not found.
1512          */
1513         return (NULL);
1514 }
1515
1516 struct inpcb *
1517 in_pcblookup_hash(struct inpcbinfo *pcbinfo, struct in_addr faddr,
1518     u_int fport_arg, struct in_addr laddr, u_int lport_arg,
1519     boolean_t wildcard, struct ifnet *ifp)
1520 {
1521         return in_pcblookup_pkthash(pcbinfo, faddr, fport_arg,
1522             laddr, lport_arg, wildcard, ifp, NULL);
1523 }
1524
1525 /*
1526  * Insert PCB into connection hash table.
1527  */
1528 void
1529 in_pcbinsconnhash(struct inpcb *inp)
1530 {
1531         struct inpcbinfo *pcbinfo = inp->inp_cpcbinfo;
1532         struct inpcbhead *bucket;
1533         u_int32_t hashkey_faddr, hashkey_laddr;
1534
1535 #ifdef INET6
1536         if (inp->inp_vflag & INP_IPV6) {
1537                 hashkey_faddr = inp->in6p_faddr.s6_addr32[3] /* XXX JH */;
1538                 hashkey_laddr = inp->in6p_laddr.s6_addr32[3] /* XXX JH */;
1539         } else {
1540 #endif
1541                 hashkey_faddr = inp->inp_faddr.s_addr;
1542                 hashkey_laddr = inp->inp_laddr.s_addr;
1543 #ifdef INET6
1544         }
1545 #endif
1546
1547         KASSERT(!(inp->inp_flags & INP_WILDCARD),
1548                 ("already on wildcardhash"));
1549         KASSERT(!(inp->inp_flags & INP_CONNECTED),
1550                 ("already on connhash"));
1551         inp->inp_flags |= INP_CONNECTED;
1552
1553         /*
1554          * Insert into the connection hash table.
1555          */
1556         bucket = &pcbinfo->hashbase[INP_PCBCONNHASH(hashkey_faddr,
1557             inp->inp_fport, hashkey_laddr, inp->inp_lport, pcbinfo->hashmask)];
1558         LIST_INSERT_HEAD(bucket, inp, inp_hash);
1559 }
1560
1561 /*
1562  * Remove PCB from connection hash table.
1563  */
1564 void
1565 in_pcbremconnhash(struct inpcb *inp)
1566 {
1567         KASSERT(inp->inp_flags & INP_CONNECTED, ("inp not connected"));
1568         LIST_REMOVE(inp, inp_hash);
1569         inp->inp_flags &= ~INP_CONNECTED;
1570 }
1571
1572 /*
1573  * Insert PCB into port hash table.
1574  */
1575 void
1576 in_pcbinsporthash(struct inpcbportinfo *portinfo, struct inpcb *inp)
1577 {
1578         struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
1579         struct inpcbporthead *pcbporthash;
1580         struct inpcbport *phd;
1581
1582         /*
1583          * If the porthashbase is shared across several cpus, it must
1584          * have been locked.
1585          */
1586         ASSERT_PORT_TOKEN_HELD(portinfo);
1587
1588         /*
1589          * Insert into the port hash table.
1590          */
1591         pcbporthash = &portinfo->porthashbase[
1592             INP_PCBPORTHASH(inp->inp_lport, portinfo->porthashmask)];
1593
1594         /* Go through port list and look for a head for this lport. */
1595         LIST_FOREACH(phd, pcbporthash, phd_hash) {
1596                 if (phd->phd_port == inp->inp_lport)
1597                         break;
1598         }
1599
1600         /* If none exists, use saved one and tack it on. */
1601         if (phd == NULL) {
1602                 KKASSERT(pcbinfo->portsave != NULL);
1603                 phd = pcbinfo->portsave;
1604                 pcbinfo->portsave = NULL;
1605                 phd->phd_port = inp->inp_lport;
1606                 LIST_INIT(&phd->phd_pcblist);
1607                 LIST_INSERT_HEAD(pcbporthash, phd, phd_hash);
1608         }
1609
1610         inp->inp_portinfo = portinfo;
1611         inp->inp_phd = phd;
1612         LIST_INSERT_HEAD(&phd->phd_pcblist, inp, inp_portlist);
1613
1614         /*
1615          * Malloc one inpcbport for later use.  It is safe to use
1616          * "wait" malloc here (port token would be released, if
1617          * malloc ever blocked), since all changes to the porthash
1618          * are done.
1619          */
1620         if (pcbinfo->portsave == NULL) {
1621                 pcbinfo->portsave = kmalloc(sizeof(*pcbinfo->portsave),
1622                                             M_PCB, M_INTWAIT | M_ZERO);
1623         }
1624 }
1625
1626 void
1627 in_pcbinsporthash_lport(struct inpcb *inp)
1628 {
1629         struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
1630         struct inpcbportinfo *portinfo;
1631         u_short lport_ho;
1632
1633         /* Locate the proper portinfo based on lport */
1634         lport_ho = ntohs(inp->inp_lport);
1635         portinfo = &pcbinfo->portinfo[lport_ho & pcbinfo->portinfo_mask];
1636         KKASSERT((lport_ho & pcbinfo->portinfo_mask) == portinfo->offset);
1637
1638         GET_PORT_TOKEN(portinfo);
1639         in_pcbinsporthash(portinfo, inp);
1640         REL_PORT_TOKEN(portinfo);
1641 }
1642
1643 static struct inp_localgroup *
1644 inp_localgroup_alloc(struct inp_localgrphead *hdr, u_char vflag,
1645     uint16_t port, const union in_dependaddr *addr, int size)
1646 {
1647         struct inp_localgroup *grp;
1648
1649         grp = kmalloc(__offsetof(struct inp_localgroup, il_inp[size]),
1650             M_TEMP, M_INTWAIT | M_ZERO);
1651         grp->il_vflag = vflag;
1652         grp->il_lport = port;
1653         grp->il_dependladdr = *addr;
1654         grp->il_inpsiz = size;
1655
1656         LIST_INSERT_HEAD(hdr, grp, il_list);
1657
1658         return grp;
1659 }
1660
1661 static void
1662 inp_localgroup_free(struct inp_localgroup *grp)
1663 {
1664         LIST_REMOVE(grp, il_list);
1665         kfree(grp, M_TEMP);
1666 }
1667
1668 static struct inp_localgroup *
1669 inp_localgroup_resize(struct inp_localgrphead *hdr,
1670     struct inp_localgroup *old_grp, int size)
1671 {
1672         struct inp_localgroup *grp;
1673         int i;
1674
1675         grp = inp_localgroup_alloc(hdr, old_grp->il_vflag,
1676             old_grp->il_lport, &old_grp->il_dependladdr, size);
1677
1678         KASSERT(old_grp->il_inpcnt < grp->il_inpsiz,
1679             ("invalid new local group size %d and old local group count %d",
1680              grp->il_inpsiz, old_grp->il_inpcnt));
1681         for (i = 0; i < old_grp->il_inpcnt; ++i)
1682                 grp->il_inp[i] = old_grp->il_inp[i];
1683         grp->il_inpcnt = old_grp->il_inpcnt;
1684         grp->il_factor = old_grp->il_factor;
1685
1686         inp_localgroup_free(old_grp);
1687
1688         return grp;
1689 }
1690
1691 static void
1692 inp_localgroup_factor(struct inp_localgroup *grp)
1693 {
1694         grp->il_factor =
1695             ((uint32_t)(0xffff >> ncpus2_shift) / grp->il_inpcnt) + 1;
1696         KASSERT(grp->il_factor != 0, ("invalid local group factor, "
1697             "ncpus2_shift %d, inpcnt %d", ncpus2_shift, grp->il_inpcnt));
1698 }
1699
1700 static void
1701 in_pcbinslocalgrphash_oncpu(struct inpcb *inp, struct inpcbinfo *pcbinfo)
1702 {
1703         struct inp_localgrphead *hdr;
1704         struct inp_localgroup *grp;
1705         struct ucred *cred;
1706
1707         if (pcbinfo->localgrphashbase == NULL)
1708                 return;
1709
1710         /*
1711          * XXX don't allow jailed socket to join local group
1712          */
1713         if (inp->inp_socket != NULL)
1714                 cred = inp->inp_socket->so_cred;
1715         else
1716                 cred = NULL;
1717         if (cred != NULL && jailed(cred))
1718                 return;
1719
1720 #ifdef INET6
1721         /*
1722          * XXX don't allow IPv4 mapped INET6 wild socket
1723          */
1724         if ((inp->inp_vflag & INP_IPV4) &&
1725             inp->inp_laddr.s_addr == INADDR_ANY &&
1726             INP_CHECK_SOCKAF(inp->inp_socket, AF_INET6))
1727                 return;
1728 #endif
1729
1730         hdr = &pcbinfo->localgrphashbase[
1731             INP_PCBLOCALGRPHASH(inp->inp_lport, pcbinfo->localgrphashmask)];
1732
1733         LIST_FOREACH(grp, hdr, il_list) {
1734                 if (grp->il_vflag == inp->inp_vflag &&
1735                     grp->il_lport == inp->inp_lport &&
1736                     memcmp(&grp->il_dependladdr,
1737                         &inp->inp_inc.inc_ie.ie_dependladdr,
1738                         sizeof(grp->il_dependladdr)) == 0) {
1739                         break;
1740                 }
1741         }
1742         if (grp == NULL) {
1743                 /* Create new local group */
1744                 grp = inp_localgroup_alloc(hdr, inp->inp_vflag,
1745                     inp->inp_lport, &inp->inp_inc.inc_ie.ie_dependladdr,
1746                     INP_LOCALGROUP_SIZMIN);
1747         } else if (grp->il_inpcnt == grp->il_inpsiz) {
1748                 if (grp->il_inpsiz >= INP_LOCALGROUP_SIZMAX) {
1749                         static int limit_logged = 0;
1750
1751                         if (!limit_logged) {
1752                                 limit_logged = 1;
1753                                 kprintf("local group port %d, "
1754                                     "limit reached\n", ntohs(grp->il_lport));
1755                         }
1756                         return;
1757                 }
1758
1759                 /* Expand this local group */
1760                 grp = inp_localgroup_resize(hdr, grp, grp->il_inpsiz * 2);
1761         }
1762
1763         KASSERT(grp->il_inpcnt < grp->il_inpsiz,
1764             ("invalid local group size %d and count %d",
1765              grp->il_inpsiz, grp->il_inpcnt));
1766         grp->il_inp[grp->il_inpcnt] = inp;
1767         grp->il_inpcnt++;
1768         inp_localgroup_factor(grp);
1769 }
1770
1771 void
1772 in_pcbinswildcardhash_oncpu(struct inpcb *inp, struct inpcbinfo *pcbinfo)
1773 {
1774         struct inpcontainer *ic;
1775         struct inpcontainerhead *bucket;
1776
1777         in_pcbinslocalgrphash_oncpu(inp, pcbinfo);
1778
1779         bucket = &pcbinfo->wildcardhashbase[
1780             INP_PCBWILDCARDHASH(inp->inp_lport, pcbinfo->wildcardhashmask)];
1781
1782         ic = kmalloc(sizeof(struct inpcontainer), M_TEMP, M_INTWAIT);
1783         ic->ic_inp = inp;
1784         LIST_INSERT_HEAD(bucket, ic, ic_list);
1785 }
1786
1787 /*
1788  * Insert PCB into wildcard hash table.
1789  */
1790 void
1791 in_pcbinswildcardhash(struct inpcb *inp)
1792 {
1793         struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
1794
1795         KASSERT(!(inp->inp_flags & INP_CONNECTED),
1796                 ("already on connhash"));
1797         KASSERT(!(inp->inp_flags & INP_WILDCARD),
1798                 ("already on wildcardhash"));
1799         inp->inp_flags |= INP_WILDCARD;
1800
1801         in_pcbinswildcardhash_oncpu(inp, pcbinfo);
1802 }
1803
1804 static void
1805 in_pcbremlocalgrphash_oncpu(struct inpcb *inp, struct inpcbinfo *pcbinfo)
1806 {
1807         struct inp_localgrphead *hdr;
1808         struct inp_localgroup *grp;
1809
1810         if (pcbinfo->localgrphashbase == NULL)
1811                 return;
1812
1813         hdr = &pcbinfo->localgrphashbase[
1814             INP_PCBLOCALGRPHASH(inp->inp_lport, pcbinfo->localgrphashmask)];
1815
1816         LIST_FOREACH(grp, hdr, il_list) {
1817                 int i;
1818
1819                 for (i = 0; i < grp->il_inpcnt; ++i) {
1820                         if (grp->il_inp[i] != inp)
1821                                 continue;
1822
1823                         if (grp->il_inpcnt == 1) {
1824                                 /* Free this local group */
1825                                 inp_localgroup_free(grp);
1826                         } else {
1827                                 /* Pull up inpcbs */
1828                                 for (; i + 1 < grp->il_inpcnt; ++i)
1829                                         grp->il_inp[i] = grp->il_inp[i + 1];
1830                                 grp->il_inpcnt--;
1831                                 inp_localgroup_factor(grp);
1832
1833                                 if (grp->il_inpsiz > INP_LOCALGROUP_SIZMIN &&
1834                                     grp->il_inpcnt <= (grp->il_inpsiz / 4)) {
1835                                         /* Shrink this local group */
1836                                         grp = inp_localgroup_resize(hdr, grp,
1837                                             grp->il_inpsiz / 2);
1838                                 }
1839                         }
1840                         return;
1841                 }
1842         }
1843 }
1844
1845 void
1846 in_pcbremwildcardhash_oncpu(struct inpcb *inp, struct inpcbinfo *pcbinfo)
1847 {
1848         struct inpcontainer *ic;
1849         struct inpcontainerhead *head;
1850
1851         in_pcbremlocalgrphash_oncpu(inp, pcbinfo);
1852
1853         /* find bucket */
1854         head = &pcbinfo->wildcardhashbase[
1855             INP_PCBWILDCARDHASH(inp->inp_lport, pcbinfo->wildcardhashmask)];
1856
1857         LIST_FOREACH(ic, head, ic_list) {
1858                 if (ic->ic_inp == inp)
1859                         goto found;
1860         }
1861         return;                 /* not found! */
1862
1863 found:
1864         LIST_REMOVE(ic, ic_list);       /* remove container from bucket chain */
1865         kfree(ic, M_TEMP);              /* deallocate container */
1866 }
1867
1868 /*
1869  * Remove PCB from wildcard hash table.
1870  */
1871 void
1872 in_pcbremwildcardhash(struct inpcb *inp)
1873 {
1874         struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
1875
1876         KASSERT(inp->inp_flags & INP_WILDCARD, ("inp not wildcard"));
1877         in_pcbremwildcardhash_oncpu(inp, pcbinfo);
1878         inp->inp_flags &= ~INP_WILDCARD;
1879 }
1880
1881 /*
1882  * Remove PCB from various lists.
1883  */
1884 void
1885 in_pcbremlists(struct inpcb *inp)
1886 {
1887         if (inp->inp_lport) {
1888                 struct inpcbportinfo *portinfo;
1889                 struct inpcbport *phd;
1890
1891                 /*
1892                  * NOTE:
1893                  * inp->inp_portinfo is _not_ necessary same as
1894                  * inp->inp_pcbinfo->portinfo.
1895                  */
1896                 portinfo = inp->inp_portinfo;
1897                 GET_PORT_TOKEN(portinfo);
1898
1899                 phd = inp->inp_phd;
1900                 LIST_REMOVE(inp, inp_portlist);
1901                 if (LIST_FIRST(&phd->phd_pcblist) == NULL) {
1902                         LIST_REMOVE(phd, phd_hash);
1903                         kfree(phd, M_PCB);
1904                 }
1905
1906                 REL_PORT_TOKEN(portinfo);
1907         }
1908         if (inp->inp_flags & INP_WILDCARD) {
1909                 in_pcbremwildcardhash(inp);
1910         } else if (inp->inp_flags & INP_CONNECTED) {
1911                 in_pcbremconnhash(inp);
1912         }
1913         LIST_REMOVE(inp, inp_list);
1914         inp->inp_pcbinfo->ipi_count--;
1915 }
1916
1917 int
1918 prison_xinpcb(struct thread *td, struct inpcb *inp)
1919 {
1920         struct ucred *cr;
1921
1922         if (td->td_proc == NULL)
1923                 return (0);
1924         cr = td->td_proc->p_ucred;
1925         if (cr->cr_prison == NULL)
1926                 return (0);
1927         if (inp->inp_socket && inp->inp_socket->so_cred &&
1928             inp->inp_socket->so_cred->cr_prison &&
1929             cr->cr_prison == inp->inp_socket->so_cred->cr_prison)
1930                 return (0);
1931         return (1);
1932 }
1933
1934 int
1935 in_pcblist_global(SYSCTL_HANDLER_ARGS)
1936 {
1937         struct inpcbinfo *pcbinfo = arg1;
1938         struct inpcb *inp, *marker;
1939         struct xinpcb xi;
1940         int error, i, n;
1941
1942         /*
1943          * The process of preparing the TCB list is too time-consuming and
1944          * resource-intensive to repeat twice on every request.
1945          */
1946         if (req->oldptr == NULL) {
1947                 n = pcbinfo->ipi_count;
1948                 req->oldidx = (n + n/8 + 10) * sizeof(struct xinpcb);
1949                 return 0;
1950         }
1951
1952         if (req->newptr != NULL)
1953                 return EPERM;
1954
1955         /*
1956          * OK, now we're committed to doing something.  Re-fetch ipi_count
1957          * after obtaining the generation count.
1958          */
1959         n = pcbinfo->ipi_count;
1960
1961         marker = kmalloc(sizeof(struct inpcb), M_TEMP, M_WAITOK|M_ZERO);
1962         marker->inp_flags |= INP_PLACEMARKER;
1963         LIST_INSERT_HEAD(&pcbinfo->pcblisthead, marker, inp_list);
1964
1965         i = 0;
1966         error = 0;
1967
1968         while ((inp = LIST_NEXT(marker, inp_list)) != NULL && i < n) {
1969                 LIST_REMOVE(marker, inp_list);
1970                 LIST_INSERT_AFTER(inp, marker, inp_list);
1971
1972                 if (inp->inp_flags & INP_PLACEMARKER)
1973                         continue;
1974                 if (prison_xinpcb(req->td, inp))
1975                         continue;
1976                 bzero(&xi, sizeof xi);
1977                 xi.xi_len = sizeof xi;
1978                 bcopy(inp, &xi.xi_inp, sizeof *inp);
1979                 if (inp->inp_socket)
1980                         sotoxsocket(inp->inp_socket, &xi.xi_socket);
1981                 if ((error = SYSCTL_OUT(req, &xi, sizeof xi)) != 0)
1982                         break;
1983                 ++i;
1984         }
1985         LIST_REMOVE(marker, inp_list);
1986         if (error == 0 && i < n) {
1987                 bzero(&xi, sizeof xi);
1988                 xi.xi_len = sizeof xi;
1989                 while (i < n) {
1990                         error = SYSCTL_OUT(req, &xi, sizeof xi);
1991                         ++i;
1992                 }
1993         }
1994         kfree(marker, M_TEMP);
1995         return(error);
1996 }
1997
1998 int
1999 in_pcblist_global_nomarker(SYSCTL_HANDLER_ARGS, struct xinpcb **xi0, int *nxi0)
2000 {
2001         struct inpcbinfo *pcbinfo = arg1;
2002         struct inpcb *inp;
2003         struct xinpcb *xi;
2004         int nxi;
2005
2006         *nxi0 = 0;
2007         *xi0 = NULL;
2008
2009         /*
2010          * The process of preparing the PCB list is too time-consuming and
2011          * resource-intensive to repeat twice on every request.
2012          */
2013         if (req->oldptr == NULL) {
2014                 int n = pcbinfo->ipi_count;
2015
2016                 req->oldidx = (n + n/8 + 10) * sizeof(struct xinpcb);
2017                 return 0;
2018         }
2019
2020         if (req->newptr != NULL)
2021                 return EPERM;
2022
2023         if (pcbinfo->ipi_count == 0)
2024                 return 0;
2025
2026         nxi = 0;
2027         xi = kmalloc(pcbinfo->ipi_count * sizeof(*xi), M_TEMP,
2028                      M_WAITOK | M_ZERO | M_NULLOK);
2029         if (xi == NULL)
2030                 return ENOMEM;
2031
2032         LIST_FOREACH(inp, &pcbinfo->pcblisthead, inp_list) {
2033                 struct xinpcb *xi_ptr = &xi[nxi];
2034
2035                 if (prison_xinpcb(req->td, inp))
2036                         continue;
2037
2038                 xi_ptr->xi_len = sizeof(*xi_ptr);
2039                 bcopy(inp, &xi_ptr->xi_inp, sizeof(*inp));
2040                 if (inp->inp_socket)
2041                         sotoxsocket(inp->inp_socket, &xi_ptr->xi_socket);
2042                 ++nxi;
2043         }
2044
2045         if (nxi == 0) {
2046                 kfree(xi, M_TEMP);
2047                 return 0;
2048         }
2049
2050         *nxi0 = nxi;
2051         *xi0 = xi;
2052
2053         return 0;
2054 }
2055
2056 void
2057 in_savefaddr(struct socket *so, const struct sockaddr *faddr)
2058 {
2059         struct sockaddr_in *sin;
2060
2061         KASSERT(faddr->sa_family == AF_INET,
2062             ("not AF_INET faddr %d", faddr->sa_family));
2063
2064         sin = kmalloc(sizeof(*sin), M_SONAME, M_WAITOK | M_ZERO);
2065         sin->sin_family = AF_INET;
2066         sin->sin_len = sizeof(*sin);
2067         sin->sin_port = ((const struct sockaddr_in *)faddr)->sin_port;
2068         sin->sin_addr = ((const struct sockaddr_in *)faddr)->sin_addr;
2069
2070         so->so_faddr = (struct sockaddr *)sin;
2071 }
2072
2073 void
2074 in_pcbportinfo_init(struct inpcbportinfo *portinfo, int hashsize,
2075     boolean_t shared, u_short offset)
2076 {
2077         memset(portinfo, 0, sizeof(*portinfo));
2078
2079         portinfo->offset = offset;
2080         portinfo->lastport = offset;
2081         portinfo->lastlow = offset;
2082         portinfo->lasthi = offset;
2083
2084         portinfo->porthashbase = hashinit(hashsize, M_PCB,
2085             &portinfo->porthashmask);
2086
2087         if (shared) {
2088                 portinfo->porttoken = kmalloc(sizeof(struct lwkt_token),
2089                     M_PCB, M_WAITOK);
2090                 lwkt_token_init(portinfo->porttoken, "porttoken");
2091         }
2092 }
2093
2094 void
2095 in_pcbportrange(u_short *hi0, u_short *lo0, u_short ofs, u_short step)
2096 {
2097         int hi, lo;
2098
2099         if (step == 1)
2100                 return;
2101
2102         hi = *hi0;
2103         lo = *lo0;
2104
2105         hi = rounddown2(hi, step);
2106         hi += ofs;
2107         if (hi > (int)*hi0)
2108                 hi -= step;
2109
2110         lo = roundup2(lo, step);
2111         lo -= (step - ofs);
2112         if (lo < (int)*lo0)
2113                 lo += step;
2114
2115         *hi0 = hi;
2116         *lo0 = lo;
2117 }