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 #include <sys/msgport2.h>
  91
  92 #include <machine/limits.h>
  93
  94 #include <net/if.h>
  95 #include <net/if_types.h>
  96 #include <net/route.h>
  97
  98 #include <netinet/in.h>
  99 #include <netinet/in_pcb.h>
 100 #include <netinet/in_var.h>
 101 #include <netinet/ip_var.h>
 102 #ifdef INET6
 103 #include <netinet/ip6.h>
 104 #include <netinet6/ip6_var.h>
 105 #endif /* INET6 */
 106
 107 #ifdef IPSEC
 108 #include <netinet6/ipsec.h>
 109 #include <netproto/key/key.h>
 110 #include <netproto/ipsec/esp_var.h>
 111 #endif
 112
 113 #ifdef FAST_IPSEC
 114 #if defined(IPSEC) || defined(IPSEC_ESP)
 115 #error "Bad idea: don't compile with both IPSEC and FAST_IPSEC!"
 116 #endif
 117
 118 #include <netproto/ipsec/ipsec.h>
 119 #include <netproto/ipsec/key.h>
 120 #define IPSEC
 121 #endif /* FAST_IPSEC */
 122
 123 struct in_addr zeroin_addr;
 124
 125 /*
 126  * These configure the range of local port addresses assigned to
 127  * "unspecified" outgoing connections/packets/whatever.
 128  */
 129 int ipport_lowfirstauto = IPPORT_RESERVED - 1;  /* 1023 */
 130 int ipport_lowlastauto = IPPORT_RESERVEDSTART;  /* 600 */
 131
 132 int ipport_firstauto = IPPORT_RESERVED;         /* 1024 */
 133 int ipport_lastauto = IPPORT_USERRESERVED;      /* 5000 */
 134
 135 int ipport_hifirstauto = IPPORT_HIFIRSTAUTO;    /* 49152 */
 136 int ipport_hilastauto = IPPORT_HILASTAUTO;      /* 65535 */
 137
 138 #define RANGECHK(var, min, max) \
 139         if ((var) < (min)) { (var) = (min); } \
 140         else if ((var) > (max)) { (var) = (max); }
 141
 142 int udpencap_enable = 1;        /* enabled by default */
 143 int udpencap_port = 4500;       /* triggers decapsulation */
 144
 145 static int
 146 sysctl_net_ipport_check(SYSCTL_HANDLER_ARGS)
 147 {
 148         int error;
 149
 150         error = sysctl_handle_int(oidp, oidp->oid_arg1, oidp->oid_arg2, req);
 151         if (!error) {
 152                 RANGECHK(ipport_lowfirstauto, 1, IPPORT_RESERVED - 1);
 153                 RANGECHK(ipport_lowlastauto, 1, IPPORT_RESERVED - 1);
 154
 155                 RANGECHK(ipport_firstauto, IPPORT_RESERVED, USHRT_MAX);
 156                 RANGECHK(ipport_lastauto, IPPORT_RESERVED, USHRT_MAX);
 157
 158                 RANGECHK(ipport_hifirstauto, IPPORT_RESERVED, USHRT_MAX);
 159                 RANGECHK(ipport_hilastauto, IPPORT_RESERVED, USHRT_MAX);
 160         }
 161         return (error);
 162 }
 163
 164 #undef RANGECHK
 165
 166 SYSCTL_NODE(_net_inet_ip, IPPROTO_IP, portrange, CTLFLAG_RW, 0, "IP Ports");
 167
 168 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, lowfirst, CTLTYPE_INT|CTLFLAG_RW,
 169            &ipport_lowfirstauto, 0, &sysctl_net_ipport_check, "I", "");
 170 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, lowlast, CTLTYPE_INT|CTLFLAG_RW,
 171            &ipport_lowlastauto, 0, &sysctl_net_ipport_check, "I", "");
 172 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, first, CTLTYPE_INT|CTLFLAG_RW,
 173            &ipport_firstauto, 0, &sysctl_net_ipport_check, "I", "");
 174 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, last, CTLTYPE_INT|CTLFLAG_RW,
 175            &ipport_lastauto, 0, &sysctl_net_ipport_check, "I", "");
 176 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, hifirst, CTLTYPE_INT|CTLFLAG_RW,
 177            &ipport_hifirstauto, 0, &sysctl_net_ipport_check, "I", "");
 178 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, hilast, CTLTYPE_INT|CTLFLAG_RW,
 179            &ipport_hilastauto, 0, &sysctl_net_ipport_check, "I", "");
 180
 181 /*
 182  * in_pcb.c: manage the Protocol Control Blocks.
 183  *
 184  * NOTE: It is assumed that most of these functions will be called from
 185  * a critical section.  XXX - There are, unfortunately, a few exceptions
 186  * to this rule that should be fixed.
 187  *
 188  * NOTE: The caller should initialize the cpu field to the cpu running the
 189  * protocol stack associated with this inpcbinfo.
 190  */
 191
 192 void
 193 in_pcbinfo_init(struct inpcbinfo *pcbinfo)
 194 {
 195         LIST_INIT(&pcbinfo->pcblisthead);
 196         pcbinfo->cpu = -1;
 197         pcbinfo->portsave = kmalloc(sizeof(*pcbinfo->portsave), M_PCB,
 198                                     M_WAITOK | M_ZERO);
 199 }
 200
 201 struct baddynamicports baddynamicports;
 202
 203 /*
 204  * Check if the specified port is invalid for dynamic allocation.
 205  */
 206 int
 207 in_baddynamic(u_int16_t port, u_int16_t proto)
 208 {
 209         switch (proto) {
 210         case IPPROTO_TCP:
 211                 return (DP_ISSET(baddynamicports.tcp, port));
 212         case IPPROTO_UDP:
 213 #ifdef IPSEC
 214                 /* Cannot preset this as it is a sysctl */
 215                 if (port == udpencap_port)
 216                         return (1);
 217 #endif
 218                 return (DP_ISSET(baddynamicports.udp, port));
 219         default:
 220                 return (0);
 221         }
 222 }
 223
 224
 225 /*
 226  * Allocate a PCB and associate it with the socket.
 227  */
 228 int
 229 in_pcballoc(struct socket *so, struct inpcbinfo *pcbinfo)
 230 {
 231         struct inpcb *inp;
 232 #ifdef IPSEC
 233         int error;
 234 #endif
 235
 236         inp = kmalloc(pcbinfo->ipi_size, M_PCB, M_WAITOK|M_ZERO);
 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         KKASSERT(inp->inp_pcbinfo == pcbinfo);
 269
 270         LIST_REMOVE(inp, inp_list);
 271         pcbinfo->ipi_count--;
 272         inp->inp_pcbinfo = NULL;
 273 }
 274
 275 /*
 276  * Relink a pcb into a new pcbinfo.
 277  */
 278 void
 279 in_pcblink(struct inpcb *inp, struct inpcbinfo *pcbinfo)
 280 {
 281         KKASSERT(inp->inp_pcbinfo == NULL);
 282         inp->inp_pcbinfo = pcbinfo;
 283         LIST_INSERT_HEAD(&pcbinfo->pcblisthead, inp, inp_list);
 284         pcbinfo->ipi_count++;
 285 }
 286
 287 int
 288 in_pcbbind(struct inpcb *inp, struct sockaddr *nam, struct thread *td)
 289 {
 290         struct socket *so = inp->inp_socket;
 291         struct proc *p = td->td_proc;
 292         unsigned short *lastport;
 293         struct sockaddr_in *sin;
 294         struct sockaddr_in jsin;
 295         struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
 296         struct ucred *cred = NULL;
 297         u_short lport = 0;
 298         int wild = 0, reuseport = (so->so_options & SO_REUSEPORT);
 299         int error;
 300
 301         KKASSERT(p);
 302
 303         if (TAILQ_EMPTY(&in_ifaddrheads[mycpuid])) /* XXX broken! */
 304                 return (EADDRNOTAVAIL);
 305         if (inp->inp_lport != 0 || inp->inp_laddr.s_addr != INADDR_ANY)
 306                 return (EINVAL);        /* already bound */
 307
 308         if (!(so->so_options & (SO_REUSEADDR|SO_REUSEPORT)))
 309                 wild = 1;    /* neither SO_REUSEADDR nor SO_REUSEPORT is set */
 310         if (p)
 311                 cred = p->p_ucred;
 312
 313         /*
 314          * This has to be atomic.  If the porthash is shared across multiple
 315          * protocol threads (aka tcp) then the token will be non-NULL.
 316          */
 317         if (pcbinfo->porttoken)
 318                 lwkt_gettoken(pcbinfo->porttoken);
 319
 320         if (nam != NULL) {
 321                 sin = (struct sockaddr_in *)nam;
 322                 if (nam->sa_len != sizeof *sin) {
 323                         error = EINVAL;
 324                         goto done;
 325                 }
 326 #ifdef notdef
 327                 /*
 328                  * We should check the family, but old programs
 329                  * incorrectly fail to initialize it.
 330                  */
 331                 if (sin->sin_family != AF_INET) {
 332                         error = EAFNOSUPPORT;
 333                         goto done;
 334                 }
 335 #endif
 336                 if (!prison_replace_wildcards(td, nam)) {
 337                         error = EINVAL;
 338                         goto done;
 339                 }
 340                 lport = sin->sin_port;
 341                 if (IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
 342                         /*
 343                          * Treat SO_REUSEADDR as SO_REUSEPORT for multicast;
 344                          * allow complete duplication of binding if
 345                          * SO_REUSEPORT is set, or if SO_REUSEADDR is set
 346                          * and a multicast address is bound on both
 347                          * new and duplicated sockets.
 348                          */
 349                         if (so->so_options & SO_REUSEADDR)
 350                                 reuseport = SO_REUSEADDR | SO_REUSEPORT;
 351                 } else if (sin->sin_addr.s_addr != INADDR_ANY) {
 352                         sin->sin_port = 0;              /* yech... */
 353                         bzero(&sin->sin_zero, sizeof sin->sin_zero);
 354                         if (ifa_ifwithaddr((struct sockaddr *)sin) == NULL) {
 355                                 error = EADDRNOTAVAIL;
 356                                 goto done;
 357                         }
 358                 }
 359                 if (lport != 0) {
 360                         struct inpcb *t;
 361
 362                         /* GROSS */
 363                         if (ntohs(lport) < IPPORT_RESERVED &&
 364                             cred &&
 365                             priv_check_cred(cred, PRIV_NETINET_RESERVEDPORT, 0)) {
 366                                 error = EACCES;
 367                                 goto done;
 368                         }
 369                         if (so->so_cred->cr_uid != 0 &&
 370                             !IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
 371                                 t = in_pcblookup_local(pcbinfo,
 372                                                        sin->sin_addr,
 373                                                        lport,
 374                                                        INPLOOKUP_WILDCARD,
 375                                                        cred);
 376                                 if (t &&
 377                                     (!in_nullhost(sin->sin_addr) ||
 378                                      !in_nullhost(t->inp_laddr) ||
 379                                      (t->inp_socket->so_options &
 380                                          SO_REUSEPORT) == 0) &&
 381                                     (so->so_cred->cr_uid !=
 382                                      t->inp_socket->so_cred->cr_uid)) {
 383 #ifdef INET6
 384                                         if (!in_nullhost(sin->sin_addr) ||
 385                                             !in_nullhost(t->inp_laddr) ||
 386                                             INP_SOCKAF(so) ==
 387                                             INP_SOCKAF(t->inp_socket))
 388 #endif
 389                                         {
 390                                                 error = EADDRINUSE;
 391                                                 goto done;
 392                                         }
 393                                 }
 394                         }
 395                         if (cred && !prison_replace_wildcards(td, nam)) {
 396                                 error = EADDRNOTAVAIL;
 397                                 goto done;
 398                         }
 399                         t = in_pcblookup_local(pcbinfo, sin->sin_addr, lport,
 400                                                wild, cred);
 401                         if (t && !(reuseport & t->inp_socket->so_options)) {
 402 #ifdef INET6
 403                                 if (!in_nullhost(sin->sin_addr) ||
 404                                     !in_nullhost(t->inp_laddr) ||
 405                                     INP_SOCKAF(so) == INP_SOCKAF(t->inp_socket))
 406 #endif
 407                                 {
 408                                         error = EADDRINUSE;
 409                                         goto done;
 410                                 }
 411                         }
 412                 }
 413                 inp->inp_laddr = sin->sin_addr;
 414         }
 415         if (lport == 0) {
 416                 ushort first, last;
 417                 int count;
 418
 419                 jsin.sin_family = AF_INET;
 420                 jsin.sin_addr.s_addr = inp->inp_laddr.s_addr;
 421                 if (!prison_replace_wildcards(td, (struct sockaddr *)&jsin)) {
 422                         inp->inp_laddr.s_addr = INADDR_ANY;
 423                         error = EINVAL;
 424                         goto done;
 425                 }
 426                 inp->inp_laddr.s_addr = jsin.sin_addr.s_addr;
 427
 428                 inp->inp_flags |= INP_ANONPORT;
 429
 430                 if (inp->inp_flags & INP_HIGHPORT) {
 431                         first = ipport_hifirstauto;     /* sysctl */
 432                         last  = ipport_hilastauto;
 433                         lastport = &pcbinfo->lasthi;
 434                 } else if (inp->inp_flags & INP_LOWPORT) {
 435                         if (cred &&
 436                             (error = priv_check_cred(cred, PRIV_NETINET_RESERVEDPORT, 0))) {
 437                                 inp->inp_laddr.s_addr = INADDR_ANY;
 438                                 goto done;
 439                         }
 440                         first = ipport_lowfirstauto;    /* 1023 */
 441                         last  = ipport_lowlastauto;     /* 600 */
 442                         lastport = &pcbinfo->lastlow;
 443                 } else {
 444                         first = ipport_firstauto;       /* sysctl */
 445                         last  = ipport_lastauto;
 446                         lastport = &pcbinfo->lastport;
 447                 }
 448                 /*
 449                  * Simple check to ensure all ports are not used up causing
 450                  * a deadlock here.
 451                  *
 452                  * We split the two cases (up and down) so that the direction
 453                  * is not being tested on each round of the loop.
 454                  */
 455                 if (first > last) {
 456                         /*
 457                          * counting down
 458                          */
 459                         count = first - last;
 460
 461                         do {
 462                                 if (count-- < 0) {      /* completely used? */
 463                                         inp->inp_laddr.s_addr = INADDR_ANY;
 464                                         error = EADDRNOTAVAIL;
 465                                         goto done;
 466                                 }
 467                                 --*lastport;
 468                                 if (*lastport > first || *lastport < last)
 469                                         *lastport = first;
 470                                 lport = htons(*lastport);
 471                         } while (in_pcblookup_local(pcbinfo, inp->inp_laddr,
 472                                                     lport, wild, cred));
 473                 } else {
 474                         /*
 475                          * counting up
 476                          */
 477                         count = last - first;
 478
 479                         do {
 480                                 if (count-- < 0) {      /* completely used? */
 481                                         inp->inp_laddr.s_addr = INADDR_ANY;
 482                                         error = EADDRNOTAVAIL;
 483                                         goto done;
 484                                 }
 485                                 ++*lastport;
 486                                 if (*lastport < first || *lastport > last)
 487                                         *lastport = first;
 488                                 lport = htons(*lastport);
 489                         } while (in_pcblookup_local(pcbinfo, inp->inp_laddr,
 490                                                     lport, wild, cred));
 491                 }
 492         }
 493         inp->inp_lport = lport;
 494
 495         jsin.sin_family = AF_INET;
 496         jsin.sin_addr.s_addr = inp->inp_laddr.s_addr;
 497         if (!prison_replace_wildcards(td, (struct sockaddr*)&jsin)) {
 498                 inp->inp_laddr.s_addr = INADDR_ANY;
 499                 inp->inp_lport = 0;
 500                 error = EINVAL;
 501                 goto done;
 502         }
 503         inp->inp_laddr.s_addr = jsin.sin_addr.s_addr;
 504
 505         if (in_pcbinsporthash(inp) != 0) {
 506                 inp->inp_laddr.s_addr = INADDR_ANY;
 507                 inp->inp_lport = 0;
 508                 error = EAGAIN;
 509                 goto done;
 510         }
 511         error = 0;
 512 done:
 513         if (pcbinfo->porttoken)
 514                 lwkt_reltoken(pcbinfo->porttoken);
 515         return error;
 516 }
 517
 518 /*
 519  *   Transform old in_pcbconnect() into an inner subroutine for new
 520  *   in_pcbconnect(): Do some validity-checking on the remote
 521  *   address (in mbuf 'nam') and then determine local host address
 522  *   (i.e., which interface) to use to access that remote host.
 523  *
 524  *   This preserves definition of in_pcbconnect(), while supporting a
 525  *   slightly different version for T/TCP.  (This is more than
 526  *   a bit of a kludge, but cleaning up the internal interfaces would
 527  *   have forced minor changes in every protocol).
 528  */
 529 int
 530 in_pcbladdr(struct inpcb *inp, struct sockaddr *nam,
 531         struct sockaddr_in **plocal_sin, struct thread *td)
 532 {
 533         struct in_ifaddr *ia;
 534         struct ucred *cred = NULL;
 535         struct sockaddr_in *sin = (struct sockaddr_in *)nam;
 536         struct sockaddr *jsin;
 537         int jailed = 0, alloc_route = 0;
 538
 539         if (nam->sa_len != sizeof *sin)
 540                 return (EINVAL);
 541         if (sin->sin_family != AF_INET)
 542                 return (EAFNOSUPPORT);
 543         if (sin->sin_port == 0)
 544                 return (EADDRNOTAVAIL);
 545         if (td && td->td_proc && td->td_proc->p_ucred)
 546                 cred = td->td_proc->p_ucred;
 547         if (cred && cred->cr_prison)
 548                 jailed = 1;
 549         if (!TAILQ_EMPTY(&in_ifaddrheads[mycpuid])) {
 550                 ia = TAILQ_FIRST(&in_ifaddrheads[mycpuid])->ia;
 551                 /*
 552                  * If the destination address is INADDR_ANY,
 553                  * use the primary local address.
 554                  * If the supplied address is INADDR_BROADCAST,
 555                  * and the primary interface supports broadcast,
 556                  * choose the broadcast address for that interface.
 557                  */
 558                 if (sin->sin_addr.s_addr == INADDR_ANY)
 559                         sin->sin_addr = IA_SIN(ia)->sin_addr;
 560                 else if (sin->sin_addr.s_addr == (u_long)INADDR_BROADCAST &&
 561                     (ia->ia_ifp->if_flags & IFF_BROADCAST))
 562                         sin->sin_addr = satosin(&ia->ia_broadaddr)->sin_addr;
 563         }
 564         if (inp->inp_laddr.s_addr == INADDR_ANY) {
 565                 struct route *ro;
 566
 567                 ia = NULL;
 568                 /*
 569                  * If route is known or can be allocated now,
 570                  * our src addr is taken from the i/f, else punt.
 571                  * Note that we should check the address family of the cached
 572                  * destination, in case of sharing the cache with IPv6.
 573                  */
 574                 ro = &inp->inp_route;
 575                 if (ro->ro_rt &&
 576                     (!(ro->ro_rt->rt_flags & RTF_UP) ||
 577                      ro->ro_dst.sa_family != AF_INET ||
 578                      satosin(&ro->ro_dst)->sin_addr.s_addr !=
 579                                       sin->sin_addr.s_addr ||
 580                      inp->inp_socket->so_options & SO_DONTROUTE)) {
 581                         RTFREE(ro->ro_rt);
 582                         ro->ro_rt = NULL;
 583                 }
 584                 if (!(inp->inp_socket->so_options & SO_DONTROUTE) && /*XXX*/
 585                     (ro->ro_rt == NULL ||
 586                     ro->ro_rt->rt_ifp == NULL)) {
 587                         /* No route yet, so try to acquire one */
 588                         bzero(&ro->ro_dst, sizeof(struct sockaddr_in));
 589                         ro->ro_dst.sa_family = AF_INET;
 590                         ro->ro_dst.sa_len = sizeof(struct sockaddr_in);
 591                         ((struct sockaddr_in *) &ro->ro_dst)->sin_addr =
 592                                 sin->sin_addr;
 593                         rtalloc(ro);
 594                         alloc_route = 1;
 595                 }
 596                 /*
 597                  * If we found a route, use the address
 598                  * corresponding to the outgoing interface
 599                  * unless it is the loopback (in case a route
 600                  * to our address on another net goes to loopback).
 601                  */
 602                 if (ro->ro_rt && !(ro->ro_rt->rt_ifp->if_flags & IFF_LOOPBACK)) {
 603                         if (jailed) {
 604                                 if (jailed_ip(cred->cr_prison,
 605                                     ro->ro_rt->rt_ifa->ifa_addr)) {
 606                                         ia = ifatoia(ro->ro_rt->rt_ifa);
 607                                 }
 608                         } else {
 609                                 ia = ifatoia(ro->ro_rt->rt_ifa);
 610                         }
 611                 }
 612                 if (ia == NULL) {
 613                         u_short fport = sin->sin_port;
 614
 615                         sin->sin_port = 0;
 616                         ia = ifatoia(ifa_ifwithdstaddr(sintosa(sin)));
 617                         if (ia && jailed && !jailed_ip(cred->cr_prison,
 618                             sintosa(&ia->ia_addr)))
 619                                 ia = NULL;
 620                         if (ia == NULL)
 621                                 ia = ifatoia(ifa_ifwithnet(sintosa(sin)));
 622                         if (ia && jailed && !jailed_ip(cred->cr_prison,
 623                             sintosa(&ia->ia_addr)))
 624                                 ia = NULL;
 625                         sin->sin_port = fport;
 626                         if (ia == NULL &&
 627                             !TAILQ_EMPTY(&in_ifaddrheads[mycpuid]))
 628                                 ia = TAILQ_FIRST(&in_ifaddrheads[mycpuid])->ia;
 629                         if (ia && jailed && !jailed_ip(cred->cr_prison,
 630                             sintosa(&ia->ia_addr)))
 631                                 ia = NULL;
 632
 633                         if (!jailed && ia == NULL)
 634                                 goto fail;
 635                 }
 636                 /*
 637                  * If the destination address is multicast and an outgoing
 638                  * interface has been set as a multicast option, use the
 639                  * address of that interface as our source address.
 640                  */
 641                 if (!jailed && IN_MULTICAST(ntohl(sin->sin_addr.s_addr)) &&
 642                     inp->inp_moptions != NULL) {
 643                         struct ip_moptions *imo;
 644                         struct ifnet *ifp;
 645
 646                         imo = inp->inp_moptions;
 647                         if (imo->imo_multicast_ifp != NULL) {
 648                                 struct in_ifaddr_container *iac;
 649
 650                                 ifp = imo->imo_multicast_ifp;
 651                                 ia = NULL;
 652                                 TAILQ_FOREACH(iac,
 653                                 &in_ifaddrheads[mycpuid], ia_link) {
 654                                         if (iac->ia->ia_ifp == ifp) {
 655                                                 ia = iac->ia;
 656                                                 break;
 657                                         }
 658                                 }
 659                                 if (ia == NULL)
 660                                         goto fail;
 661                         }
 662                 }
 663                 /*
 664                  * Don't do pcblookup call here; return interface in plocal_sin
 665                  * and exit to caller, that will do the lookup.
 666                  */
 667                 if (ia == NULL && jailed) {
 668                         if ((jsin = prison_get_nonlocal(cred->cr_prison, AF_INET, NULL)) != NULL ||
 669                             (jsin = prison_get_local(cred->cr_prison, AF_INET, NULL)) != NULL) {
 670                                 *plocal_sin = satosin(jsin);
 671                         } else {
 672                                 /* IPv6 only Jail */
 673                                 goto fail;
 674                         }
 675                 } else {
 676                         *plocal_sin = &ia->ia_addr;
 677                 }
 678         }
 679         return (0);
 680 fail:
 681         if (alloc_route) {
 682                 struct route *ro = &inp->inp_route;
 683
 684                 if (ro->ro_rt != NULL)
 685                         RTFREE(ro->ro_rt);
 686                 bzero(ro, sizeof(*ro));
 687         }
 688         return (EADDRNOTAVAIL);
 689 }
 690
 691 /*
 692  * Outer subroutine:
 693  * Connect from a socket to a specified address.
 694  * Both address and port must be specified in argument sin.
 695  * If don't have a local address for this socket yet,
 696  * then pick one.
 697  */
 698 int
 699 in_pcbconnect(struct inpcb *inp, struct sockaddr *nam, struct thread *td)
 700 {
 701         struct sockaddr_in *if_sin;
 702         struct sockaddr_in *sin = (struct sockaddr_in *)nam;
 703         int error;
 704
 705         /* Call inner routine to assign local interface address. */
 706         if ((error = in_pcbladdr(inp, nam, &if_sin, td)) != 0)
 707                 return (error);
 708
 709         if (in_pcblookup_hash(inp->inp_cpcbinfo, sin->sin_addr, sin->sin_port,
 710                               inp->inp_laddr.s_addr ?
 711                                 inp->inp_laddr : if_sin->sin_addr,
 712                               inp->inp_lport, FALSE, NULL) != NULL) {
 713                 return (EADDRINUSE);
 714         }
 715         if (inp->inp_laddr.s_addr == INADDR_ANY) {
 716                 if (inp->inp_lport == 0) {
 717                         error = in_pcbbind(inp, NULL, td);
 718                         if (error)
 719                                 return (error);
 720                 }
 721                 inp->inp_laddr = if_sin->sin_addr;
 722         }
 723         inp->inp_faddr = sin->sin_addr;
 724         inp->inp_fport = sin->sin_port;
 725         in_pcbinsconnhash(inp);
 726         return (0);
 727 }
 728
 729 void
 730 in_pcbdisconnect(struct inpcb *inp)
 731 {
 732
 733         inp->inp_faddr.s_addr = INADDR_ANY;
 734         inp->inp_fport = 0;
 735         in_pcbremconnhash(inp);
 736         if (inp->inp_socket->so_state & SS_NOFDREF)
 737                 in_pcbdetach(inp);
 738 }
 739
 740 void
 741 in_pcbdetach(struct inpcb *inp)
 742 {
 743         struct socket *so = inp->inp_socket;
 744         struct inpcbinfo *ipi = inp->inp_pcbinfo;
 745
 746 #ifdef IPSEC
 747         ipsec4_delete_pcbpolicy(inp);
 748 #endif /*IPSEC*/
 749         inp->inp_gencnt = ++ipi->ipi_gencnt;
 750         KKASSERT((so->so_state & SS_ASSERTINPROG) == 0);
 751         in_pcbremlists(inp);
 752         so->so_pcb = NULL;
 753         sofree(so);                     /* remove pcb ref */
 754         if (inp->inp_options)
 755                 m_free(inp->inp_options);
 756         if (inp->inp_route.ro_rt)
 757                 rtfree(inp->inp_route.ro_rt);
 758         ip_freemoptions(inp->inp_moptions);
 759         inp->inp_vflag = 0;
 760         kfree(inp, M_PCB);
 761 }
 762
 763 /*
 764  * The calling convention of in_setsockaddr() and in_setpeeraddr() was
 765  * modified to match the pru_sockaddr() and pru_peeraddr() entry points
 766  * in struct pr_usrreqs, so that protocols can just reference then directly
 767  * without the need for a wrapper function.  The socket must have a valid
 768  * (i.e., non-nil) PCB, but it should be impossible to get an invalid one
 769  * except through a kernel programming error, so it is acceptable to panic
 770  * (or in this case trap) if the PCB is invalid.  (Actually, we don't trap
 771  * because there actually /is/ a programming error somewhere... XXX)
 772  */
 773 int
 774 in_setsockaddr(struct socket *so, struct sockaddr **nam)
 775 {
 776         struct inpcb *inp;
 777         struct sockaddr_in *sin;
 778
 779         /*
 780          * Do the malloc first in case it blocks.
 781          */
 782         MALLOC(sin, struct sockaddr_in *, sizeof *sin, M_SONAME,
 783                 M_WAITOK | M_ZERO);
 784         sin->sin_family = AF_INET;
 785         sin->sin_len = sizeof *sin;
 786
 787         crit_enter();
 788         inp = so->so_pcb;
 789         if (!inp) {
 790                 crit_exit();
 791                 kfree(sin, M_SONAME);
 792                 return (ECONNRESET);
 793         }
 794         sin->sin_port = inp->inp_lport;
 795         sin->sin_addr = inp->inp_laddr;
 796         crit_exit();
 797
 798         *nam = (struct sockaddr *)sin;
 799         return (0);
 800 }
 801
 802 void
 803 in_setsockaddr_dispatch(netmsg_t msg)
 804 {
 805         int error;
 806
 807         error = in_setsockaddr(msg->base.nm_so, msg->peeraddr.nm_nam);
 808         lwkt_replymsg(&msg->lmsg, error);
 809 }
 810
 811 int
 812 in_setpeeraddr(struct socket *so, struct sockaddr **nam)
 813 {
 814         struct inpcb *inp;
 815         struct sockaddr_in *sin;
 816
 817         /*
 818          * Do the malloc first in case it blocks.
 819          */
 820         MALLOC(sin, struct sockaddr_in *, sizeof *sin, M_SONAME,
 821                 M_WAITOK | M_ZERO);
 822         sin->sin_family = AF_INET;
 823         sin->sin_len = sizeof *sin;
 824
 825         crit_enter();
 826         inp = so->so_pcb;
 827         if (!inp) {
 828                 crit_exit();
 829                 kfree(sin, M_SONAME);
 830                 return (ECONNRESET);
 831         }
 832         sin->sin_port = inp->inp_fport;
 833         sin->sin_addr = inp->inp_faddr;
 834         crit_exit();
 835
 836         *nam = (struct sockaddr *)sin;
 837         return (0);
 838 }
 839
 840 void
 841 in_setpeeraddr_dispatch(netmsg_t msg)
 842 {
 843         int error;
 844
 845         error = in_setpeeraddr(msg->base.nm_so, msg->peeraddr.nm_nam);
 846         lwkt_replymsg(&msg->lmsg, error);
 847 }
 848
 849 void
 850 in_pcbnotifyall(struct inpcbhead *head, struct in_addr faddr, int err,
 851                 void (*notify)(struct inpcb *, int))
 852 {
 853         struct inpcb *inp, *ninp;
 854
 855         /*
 856          * note: if INP_PLACEMARKER is set we must ignore the rest of
 857          * the structure and skip it.
 858          */
 859         crit_enter();
 860         LIST_FOREACH_MUTABLE(inp, head, inp_list, ninp) {
 861                 if (inp->inp_flags & INP_PLACEMARKER)
 862                         continue;
 863 #ifdef INET6
 864                 if (!(inp->inp_vflag & INP_IPV4))
 865                         continue;
 866 #endif
 867                 if (inp->inp_faddr.s_addr != faddr.s_addr ||
 868                     inp->inp_socket == NULL)
 869                         continue;
 870                 (*notify)(inp, err);            /* can remove inp from list! */
 871         }
 872         crit_exit();
 873 }
 874
 875 void
 876 in_pcbpurgeif0(struct inpcb *head, struct ifnet *ifp)
 877 {
 878         struct inpcb *inp;
 879         struct ip_moptions *imo;
 880         int i, gap;
 881
 882         for (inp = head; inp != NULL; inp = LIST_NEXT(inp, inp_list)) {
 883                 if (inp->inp_flags & INP_PLACEMARKER)
 884                         continue;
 885                 imo = inp->inp_moptions;
 886                 if ((inp->inp_vflag & INP_IPV4) && imo != NULL) {
 887                         /*
 888                          * Unselect the outgoing interface if it is being
 889                          * detached.
 890                          */
 891                         if (imo->imo_multicast_ifp == ifp)
 892                                 imo->imo_multicast_ifp = NULL;
 893
 894                         /*
 895                          * Drop multicast group membership if we joined
 896                          * through the interface being detached.
 897                          */
 898                         for (i = 0, gap = 0; i < imo->imo_num_memberships;
 899                             i++) {
 900                                 if (imo->imo_membership[i]->inm_ifp == ifp) {
 901                                         in_delmulti(imo->imo_membership[i]);
 902                                         gap++;
 903                                 } else if (gap != 0)
 904                                         imo->imo_membership[i - gap] =
 905                                             imo->imo_membership[i];
 906                         }
 907                         imo->imo_num_memberships -= gap;
 908                 }
 909         }
 910 }
 911
 912 /*
 913  * Check for alternatives when higher level complains
 914  * about service problems.  For now, invalidate cached
 915  * routing information.  If the route was created dynamically
 916  * (by a redirect), time to try a default gateway again.
 917  */
 918 void
 919 in_losing(struct inpcb *inp)
 920 {
 921         struct rtentry *rt;
 922         struct rt_addrinfo rtinfo;
 923
 924         if ((rt = inp->inp_route.ro_rt)) {
 925                 bzero(&rtinfo, sizeof(struct rt_addrinfo));
 926                 rtinfo.rti_info[RTAX_DST] = rt_key(rt);
 927                 rtinfo.rti_info[RTAX_GATEWAY] = rt->rt_gateway;
 928                 rtinfo.rti_info[RTAX_NETMASK] = rt_mask(rt);
 929                 rtinfo.rti_flags = rt->rt_flags;
 930                 rt_missmsg(RTM_LOSING, &rtinfo, rt->rt_flags, 0);
 931                 if (rt->rt_flags & RTF_DYNAMIC)
 932                         rtrequest1_global(RTM_DELETE, &rtinfo, NULL, NULL);
 933                 inp->inp_route.ro_rt = NULL;
 934                 rtfree(rt);
 935                 /*
 936                  * A new route can be allocated
 937                  * the next time output is attempted.
 938                  */
 939         }
 940 }
 941
 942 /*
 943  * After a routing change, flush old routing
 944  * and allocate a (hopefully) better one.
 945  */
 946 void
 947 in_rtchange(struct inpcb *inp, int err)
 948 {
 949         if (inp->inp_route.ro_rt) {
 950                 rtfree(inp->inp_route.ro_rt);
 951                 inp->inp_route.ro_rt = NULL;
 952                 /*
 953                  * A new route can be allocated the next time
 954                  * output is attempted.
 955                  */
 956         }
 957 }
 958
 959 /*
 960  * Lookup a PCB based on the local address and port.
 961  */
 962 struct inpcb *
 963 in_pcblookup_local(struct inpcbinfo *pcbinfo, struct in_addr laddr,
 964                    u_int lport_arg, int wild_okay, struct ucred *cred)
 965 {
 966         struct inpcb *inp;
 967         int matchwild = 3, wildcard;
 968         u_short lport = lport_arg;
 969         struct inpcbporthead *porthash;
 970         struct inpcbport *phd;
 971         struct inpcb *match = NULL;
 972
 973         /*
 974          * If the porthashbase is shared across several cpus we need
 975          * to lock.
 976          */
 977         if (pcbinfo->porttoken)
 978                 lwkt_gettoken(pcbinfo->porttoken);
 979
 980         /*
 981          * Best fit PCB lookup.
 982          *
 983          * First see if this local port is in use by looking on the
 984          * port hash list.
 985          */
 986         porthash = &pcbinfo->porthashbase[
 987                         INP_PCBPORTHASH(lport, pcbinfo->porthashmask)];
 988         LIST_FOREACH(phd, porthash, phd_hash) {
 989                 if (phd->phd_port == lport)
 990                         break;
 991         }
 992         if (phd != NULL) {
 993                 /*
 994                  * Port is in use by one or more PCBs. Look for best
 995                  * fit.
 996                  */
 997                 LIST_FOREACH(inp, &phd->phd_pcblist, inp_portlist) {
 998                         wildcard = 0;
 999 #ifdef INET6
1000                         if ((inp->inp_vflag & INP_IPV4) == 0)
1001                                 continue;
1002 #endif
1003                         if (inp->inp_faddr.s_addr != INADDR_ANY)
1004                                 wildcard++;
1005                         if (inp->inp_laddr.s_addr != INADDR_ANY) {
1006                                 if (laddr.s_addr == INADDR_ANY)
1007                                         wildcard++;
1008                                 else if (inp->inp_laddr.s_addr != laddr.s_addr)
1009                                         continue;
1010                         } else {
1011                                 if (laddr.s_addr != INADDR_ANY)
1012                                         wildcard++;
1013                         }
1014                         if (wildcard && !wild_okay)
1015                                 continue;
1016                         if (wildcard < matchwild &&
1017                             (cred == NULL ||
1018                              cred->cr_prison ==
1019                                         inp->inp_socket->so_cred->cr_prison)) {
1020                                 match = inp;
1021                                 matchwild = wildcard;
1022                                 if (matchwild == 0) {
1023                                         break;
1024                                 }
1025                         }
1026                 }
1027         }
1028         if (pcbinfo->porttoken)
1029                 lwkt_reltoken(pcbinfo->porttoken);
1030         return (match);
1031 }
1032
1033 /*
1034  * Lookup PCB in hash list.
1035  */
1036 struct inpcb *
1037 in_pcblookup_hash(struct inpcbinfo *pcbinfo, struct in_addr faddr,
1038                   u_int fport_arg, struct in_addr laddr, u_int lport_arg,
1039                   boolean_t wildcard, struct ifnet *ifp)
1040 {
1041         struct inpcbhead *head;
1042         struct inpcb *inp, *jinp=NULL;
1043         u_short fport = fport_arg, lport = lport_arg;
1044
1045         /*
1046          * First look for an exact match.
1047          */
1048         head = &pcbinfo->hashbase[INP_PCBCONNHASH(faddr.s_addr, fport,
1049             laddr.s_addr, lport, pcbinfo->hashmask)];
1050         LIST_FOREACH(inp, head, inp_hash) {
1051 #ifdef INET6
1052                 if (!(inp->inp_vflag & INP_IPV4))
1053                         continue;
1054 #endif
1055                 if (in_hosteq(inp->inp_faddr, faddr) &&
1056                     in_hosteq(inp->inp_laddr, laddr) &&
1057                     inp->inp_fport == fport && inp->inp_lport == lport) {
1058                         /* found */
1059                         if (inp->inp_socket == NULL ||
1060                             inp->inp_socket->so_cred->cr_prison == NULL) {
1061                                 return (inp);
1062                         } else {
1063                                 if  (jinp == NULL)
1064                                         jinp = inp;
1065                         }
1066                 }
1067         }
1068         if (jinp != NULL)
1069                 return (jinp);
1070         if (wildcard) {
1071                 struct inpcb *local_wild = NULL;
1072                 struct inpcb *jinp_wild = NULL;
1073 #ifdef INET6
1074                 struct inpcb *local_wild_mapped = NULL;
1075 #endif
1076                 struct inpcontainer *ic;
1077                 struct inpcontainerhead *chead;
1078                 struct sockaddr_in jsin;
1079                 struct ucred *cred;
1080
1081                 /*
1082                  * Order of socket selection:
1083                  * 1. non-jailed, non-wild.
1084                  * 2. non-jailed, wild.
1085                  * 3. jailed, non-wild.
1086                  * 4. jailed, wild.
1087                  */
1088                 jsin.sin_family = AF_INET;
1089                 chead = &pcbinfo->wildcardhashbase[
1090                     INP_PCBWILDCARDHASH(lport, pcbinfo->wildcardhashmask)];
1091                 LIST_FOREACH(ic, chead, ic_list) {
1092                         inp = ic->ic_inp;
1093                         jsin.sin_addr.s_addr = laddr.s_addr;
1094 #ifdef INET6
1095                         if (!(inp->inp_vflag & INP_IPV4))
1096                                 continue;
1097 #endif
1098                         if (inp->inp_socket != NULL)
1099                                 cred = inp->inp_socket->so_cred;
1100                         else
1101                                 cred = NULL;
1102                         if (cred != NULL && jailed(cred)) {
1103                                 if (jinp != NULL)
1104                                         continue;
1105                                 else
1106                                         if (!jailed_ip(cred->cr_prison,
1107                                             (struct sockaddr *)&jsin))
1108                                                 continue;
1109                         }
1110                         if (inp->inp_lport == lport) {
1111                                 if (ifp && ifp->if_type == IFT_FAITH &&
1112                                     !(inp->inp_flags & INP_FAITH))
1113                                         continue;
1114                                 if (inp->inp_laddr.s_addr == laddr.s_addr) {
1115                                         if (cred != NULL && jailed(cred))
1116                                                 jinp = inp;
1117                                         else
1118                                                 return (inp);
1119                                 }
1120                                 if (inp->inp_laddr.s_addr == INADDR_ANY) {
1121 #ifdef INET6
1122                                         if (INP_CHECK_SOCKAF(inp->inp_socket,
1123                                                              AF_INET6))
1124                                                 local_wild_mapped = inp;
1125                                         else
1126 #endif
1127                                                 if (cred != NULL &&
1128                                                     jailed(cred))
1129                                                         jinp_wild = inp;
1130                                                 else
1131                                                         local_wild = inp;
1132                                 }
1133                         }
1134                 }
1135                 if (local_wild != NULL)
1136                         return (local_wild);
1137 #ifdef INET6
1138                 if (local_wild_mapped != NULL)
1139                         return (local_wild_mapped);
1140 #endif
1141                 if (jinp != NULL)
1142                         return (jinp);
1143                 return (jinp_wild);
1144         }
1145
1146         /*
1147          * Not found.
1148          */
1149         return (NULL);
1150 }
1151
1152 /*
1153  * Insert PCB into connection hash table.
1154  */
1155 void
1156 in_pcbinsconnhash(struct inpcb *inp)
1157 {
1158         struct inpcbinfo *pcbinfo = inp->inp_cpcbinfo;
1159         struct inpcbhead *bucket;
1160         u_int32_t hashkey_faddr, hashkey_laddr;
1161
1162 #ifdef INET6
1163         if (inp->inp_vflag & INP_IPV6) {
1164                 hashkey_faddr = inp->in6p_faddr.s6_addr32[3] /* XXX JH */;
1165                 hashkey_laddr = inp->in6p_laddr.s6_addr32[3] /* XXX JH */;
1166         } else {
1167 #endif
1168                 hashkey_faddr = inp->inp_faddr.s_addr;
1169                 hashkey_laddr = inp->inp_laddr.s_addr;
1170 #ifdef INET6
1171         }
1172 #endif
1173
1174         KASSERT(!(inp->inp_flags & INP_CONNECTED), ("already on hash list"));
1175         inp->inp_flags |= INP_CONNECTED;
1176
1177         /*
1178          * Insert into the connection hash table.
1179          */
1180         bucket = &pcbinfo->hashbase[INP_PCBCONNHASH(hashkey_faddr,
1181             inp->inp_fport, hashkey_laddr, inp->inp_lport, pcbinfo->hashmask)];
1182         LIST_INSERT_HEAD(bucket, inp, inp_hash);
1183 }
1184
1185 /*
1186  * Remove PCB from connection hash table.
1187  */
1188 void
1189 in_pcbremconnhash(struct inpcb *inp)
1190 {
1191         KASSERT(inp->inp_flags & INP_CONNECTED, ("inp not connected"));
1192         LIST_REMOVE(inp, inp_hash);
1193         inp->inp_flags &= ~INP_CONNECTED;
1194 }
1195
1196 /*
1197  * Insert PCB into port hash table.
1198  */
1199 int
1200 in_pcbinsporthash(struct inpcb *inp)
1201 {
1202         struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
1203         struct inpcbporthead *pcbporthash;
1204         struct inpcbport *phd;
1205
1206         /*
1207          * If the porthashbase is shared across several cpus we need
1208          * to lock.
1209          */
1210         if (pcbinfo->porttoken)
1211                 lwkt_gettoken(pcbinfo->porttoken);
1212
1213         /*
1214          * Insert into the port hash table.
1215          */
1216         pcbporthash = &pcbinfo->porthashbase[
1217             INP_PCBPORTHASH(inp->inp_lport, pcbinfo->porthashmask)];
1218
1219         /* Go through port list and look for a head for this lport. */
1220         LIST_FOREACH(phd, pcbporthash, phd_hash) {
1221                 if (phd->phd_port == inp->inp_lport)
1222                         break;
1223         }
1224
1225         /* If none exists, malloc one and tack it on. */
1226         if (phd == NULL) {
1227                 KKASSERT(pcbinfo->portsave != NULL);
1228                 phd = pcbinfo->portsave;
1229                 pcbinfo->portsave = NULL;
1230                 phd->phd_port = inp->inp_lport;
1231                 LIST_INIT(&phd->phd_pcblist);
1232                 LIST_INSERT_HEAD(pcbporthash, phd, phd_hash);
1233         }
1234
1235         inp->inp_phd = phd;
1236         LIST_INSERT_HEAD(&phd->phd_pcblist, inp, inp_portlist);
1237
1238         if (pcbinfo->porttoken)
1239                 lwkt_reltoken(pcbinfo->porttoken);
1240         if (pcbinfo->portsave == NULL) {
1241                 pcbinfo->portsave = kmalloc(sizeof(*pcbinfo->portsave),
1242                                             M_PCB, M_INTWAIT | M_ZERO);
1243         }
1244         return (0);
1245 }
1246
1247 void
1248 in_pcbinswildcardhash_oncpu(struct inpcb *inp, struct inpcbinfo *pcbinfo)
1249 {
1250         struct inpcontainer *ic;
1251         struct inpcontainerhead *bucket;
1252
1253         bucket = &pcbinfo->wildcardhashbase[
1254             INP_PCBWILDCARDHASH(inp->inp_lport, pcbinfo->wildcardhashmask)];
1255
1256         ic = kmalloc(sizeof(struct inpcontainer), M_TEMP, M_INTWAIT);
1257         ic->ic_inp = inp;
1258         LIST_INSERT_HEAD(bucket, ic, ic_list);
1259 }
1260
1261 /*
1262  * Insert PCB into wildcard hash table.
1263  */
1264 void
1265 in_pcbinswildcardhash(struct inpcb *inp)
1266 {
1267         struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
1268
1269         KKASSERT(pcbinfo != NULL);
1270
1271         in_pcbinswildcardhash_oncpu(inp, pcbinfo);
1272         inp->inp_flags |= INP_WILDCARD;
1273 }
1274
1275 void
1276 in_pcbremwildcardhash_oncpu(struct inpcb *inp, struct inpcbinfo *pcbinfo)
1277 {
1278         struct inpcontainer *ic;
1279         struct inpcontainerhead *head;
1280
1281         /* find bucket */
1282         head = &pcbinfo->wildcardhashbase[
1283             INP_PCBWILDCARDHASH(inp->inp_lport, pcbinfo->wildcardhashmask)];
1284
1285         LIST_FOREACH(ic, head, ic_list) {
1286                 if (ic->ic_inp == inp)
1287                         goto found;
1288         }
1289         return;                 /* not found! */
1290
1291 found:
1292         LIST_REMOVE(ic, ic_list);       /* remove container from bucket chain */
1293         kfree(ic, M_TEMP);              /* deallocate container */
1294 }
1295
1296 /*
1297  * Remove PCB from wildcard hash table.
1298  */
1299 void
1300 in_pcbremwildcardhash(struct inpcb *inp)
1301 {
1302         struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
1303
1304         KASSERT(inp->inp_flags & INP_WILDCARD, ("inp not wildcard"));
1305         in_pcbremwildcardhash_oncpu(inp, pcbinfo);
1306         inp->inp_flags &= ~INP_WILDCARD;
1307 }
1308
1309 /*
1310  * Remove PCB from various lists.
1311  */
1312 void
1313 in_pcbremlists(struct inpcb *inp)
1314 {
1315         struct inpcbinfo *pcbinfo;
1316
1317         if (inp->inp_lport) {
1318                 struct inpcbport *phd;
1319
1320                 pcbinfo = inp->inp_pcbinfo;
1321                 if (pcbinfo->porttoken)
1322                         lwkt_gettoken(pcbinfo->porttoken);
1323
1324                 phd = inp->inp_phd;
1325                 LIST_REMOVE(inp, inp_portlist);
1326                 if (LIST_FIRST(&phd->phd_pcblist) == NULL) {
1327                         LIST_REMOVE(phd, phd_hash);
1328                         kfree(phd, M_PCB);
1329                 }
1330                 if (pcbinfo->porttoken)
1331                         lwkt_reltoken(pcbinfo->porttoken);
1332         }
1333         if (inp->inp_flags & INP_WILDCARD) {
1334                 in_pcbremwildcardhash(inp);
1335         } else if (inp->inp_flags & INP_CONNECTED) {
1336                 in_pcbremconnhash(inp);
1337         }
1338         LIST_REMOVE(inp, inp_list);
1339         inp->inp_pcbinfo->ipi_count--;
1340 }
1341
1342 int
1343 prison_xinpcb(struct thread *td, struct inpcb *inp)
1344 {
1345         struct ucred *cr;
1346
1347         if (td->td_proc == NULL)
1348                 return (0);
1349         cr = td->td_proc->p_ucred;
1350         if (cr->cr_prison == NULL)
1351                 return (0);
1352         if (inp->inp_socket && inp->inp_socket->so_cred &&
1353             inp->inp_socket->so_cred->cr_prison &&
1354             cr->cr_prison == inp->inp_socket->so_cred->cr_prison)
1355                 return (0);
1356         return (1);
1357 }
1358
1359 int
1360 in_pcblist_global(SYSCTL_HANDLER_ARGS)
1361 {
1362         struct inpcbinfo *pcbinfo = arg1;
1363         struct inpcb *inp, *marker;
1364         struct xinpcb xi;
1365         int error, i, n;
1366
1367         /*
1368          * The process of preparing the TCB list is too time-consuming and
1369          * resource-intensive to repeat twice on every request.
1370          */
1371         if (req->oldptr == NULL) {
1372                 n = pcbinfo->ipi_count;
1373                 req->oldidx = (n + n/8 + 10) * sizeof(struct xinpcb);
1374                 return 0;
1375         }
1376
1377         if (req->newptr != NULL)
1378                 return EPERM;
1379
1380         /*
1381          * OK, now we're committed to doing something.  Re-fetch ipi_count
1382          * after obtaining the generation count.
1383          */
1384         n = pcbinfo->ipi_count;
1385
1386         marker = kmalloc(sizeof(struct inpcb), M_TEMP, M_WAITOK|M_ZERO);
1387         marker->inp_flags |= INP_PLACEMARKER;
1388         LIST_INSERT_HEAD(&pcbinfo->pcblisthead, marker, inp_list);
1389
1390         i = 0;
1391         error = 0;
1392
1393         while ((inp = LIST_NEXT(marker, inp_list)) != NULL && i < n) {
1394                 LIST_REMOVE(marker, inp_list);
1395                 LIST_INSERT_AFTER(inp, marker, inp_list);
1396
1397                 if (inp->inp_flags & INP_PLACEMARKER)
1398                         continue;
1399                 if (prison_xinpcb(req->td, inp))
1400                         continue;
1401                 bzero(&xi, sizeof xi);
1402                 xi.xi_len = sizeof xi;
1403                 bcopy(inp, &xi.xi_inp, sizeof *inp);
1404                 if (inp->inp_socket)
1405                         sotoxsocket(inp->inp_socket, &xi.xi_socket);
1406                 if ((error = SYSCTL_OUT(req, &xi, sizeof xi)) != 0)
1407                         break;
1408                 ++i;
1409         }
1410         LIST_REMOVE(marker, inp_list);
1411         if (error == 0 && i < n) {
1412                 bzero(&xi, sizeof xi);
1413                 xi.xi_len = sizeof xi;
1414                 while (i < n) {
1415                         error = SYSCTL_OUT(req, &xi, sizeof xi);
1416                         ++i;
1417                 }
1418         }
1419         kfree(marker, M_TEMP);
1420         return(error);
1421 }
1422
1423 int
1424 in_pcblist_global_nomarker(SYSCTL_HANDLER_ARGS, struct xinpcb **xi0, int *nxi0)
1425 {
1426         struct inpcbinfo *pcbinfo = arg1;
1427         struct inpcb *inp;
1428         struct xinpcb *xi;
1429         int nxi;
1430
1431         *nxi0 = 0;
1432         *xi0 = NULL;
1433
1434         /*
1435          * The process of preparing the PCB list is too time-consuming and
1436          * resource-intensive to repeat twice on every request.
1437          */
1438         if (req->oldptr == NULL) {
1439                 int n = pcbinfo->ipi_count;
1440
1441                 req->oldidx = (n + n/8 + 10) * sizeof(struct xinpcb);
1442                 return 0;
1443         }
1444
1445         if (req->newptr != NULL)
1446                 return EPERM;
1447
1448         if (pcbinfo->ipi_count == 0)
1449                 return 0;
1450
1451         nxi = 0;
1452         xi = kmalloc(pcbinfo->ipi_count * sizeof(*xi), M_TEMP,
1453                      M_WAITOK | M_ZERO | M_NULLOK);
1454         if (xi == NULL)
1455                 return ENOMEM;
1456
1457         LIST_FOREACH(inp, &pcbinfo->pcblisthead, inp_list) {
1458                 struct xinpcb *xi_ptr = &xi[nxi];
1459
1460                 if (prison_xinpcb(req->td, inp))
1461                         continue;
1462
1463                 xi_ptr->xi_len = sizeof(*xi_ptr);
1464                 bcopy(inp, &xi_ptr->xi_inp, sizeof(*inp));
1465                 if (inp->inp_socket)
1466                         sotoxsocket(inp->inp_socket, &xi_ptr->xi_socket);
1467                 ++nxi;
1468         }
1469
1470         if (nxi == 0) {
1471                 kfree(xi, M_TEMP);
1472                 return 0;
1473         }
1474
1475         *nxi0 = nxi;
1476         *xi0 = xi;
1477
1478         return 0;
1479 }