sys/netinet/in_pcb.c

   1 /*-
   2  * Copyright (c) 1982, 1986, 1991, 1993, 1995
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 4. Neither the name of the University nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  *      @(#)in_pcb.c    8.4 (Berkeley) 5/24/95
  30  * $FreeBSD$
  31  */
  32
  33 #include "opt_ipsec.h"
  34 #include "opt_inet6.h"
  35 #include "opt_mac.h"
  36
  37 #include <sys/param.h>
  38 #include <sys/systm.h>
  39 #include <sys/malloc.h>
  40 #include <sys/mbuf.h>
  41 #include <sys/domain.h>
  42 #include <sys/protosw.h>
  43 #include <sys/socket.h>
  44 #include <sys/socketvar.h>
  45 #include <sys/priv.h>
  46 #include <sys/proc.h>
  47 #include <sys/jail.h>
  48 #include <sys/kernel.h>
  49 #include <sys/sysctl.h>
  50
  51 #include <vm/uma.h>
  52
  53 #include <net/if.h>
  54 #include <net/if_types.h>
  55 #include <net/route.h>
  56
  57 #include <netinet/in.h>
  58 #include <netinet/in_pcb.h>
  59 #include <netinet/in_var.h>
  60 #include <netinet/ip_var.h>
  61 #include <netinet/tcp_var.h>
  62 #include <netinet/udp.h>
  63 #include <netinet/udp_var.h>
  64 #ifdef INET6
  65 #include <netinet/ip6.h>
  66 #include <netinet6/ip6_var.h>
  67 #endif /* INET6 */
  68
  69 #ifdef IPSEC
  70 #include <netinet6/ipsec.h>
  71 #include <netkey/key.h>
  72 #endif /* IPSEC */
  73
  74 #ifdef FAST_IPSEC
  75 #if defined(IPSEC) || defined(IPSEC_ESP)
  76 #error "Bad idea: don't compile with both IPSEC and FAST_IPSEC!"
  77 #endif
  78
  79 #include <netipsec/ipsec.h>
  80 #include <netipsec/key.h>
  81 #endif /* FAST_IPSEC */
  82
  83 #include <security/mac/mac_framework.h>
  84
  85 /*
  86  * These configure the range of local port addresses assigned to
  87  * "unspecified" outgoing connections/packets/whatever.
  88  */
  89 int     ipport_lowfirstauto  = IPPORT_RESERVED - 1;     /* 1023 */
  90 int     ipport_lowlastauto = IPPORT_RESERVEDSTART;      /* 600 */
  91 int     ipport_firstauto = IPPORT_HIFIRSTAUTO;          /* 49152 */
  92 int     ipport_lastauto  = IPPORT_HILASTAUTO;           /* 65535 */
  93 int     ipport_hifirstauto = IPPORT_HIFIRSTAUTO;        /* 49152 */
  94 int     ipport_hilastauto  = IPPORT_HILASTAUTO;         /* 65535 */
  95
  96 /*
  97  * Reserved ports accessible only to root. There are significant
  98  * security considerations that must be accounted for when changing these,
  99  * but the security benefits can be great. Please be careful.
 100  */
 101 int     ipport_reservedhigh = IPPORT_RESERVED - 1;      /* 1023 */
 102 int     ipport_reservedlow = 0;
 103
 104 /* Variables dealing with random ephemeral port allocation. */
 105 int     ipport_randomized = 1;  /* user controlled via sysctl */
 106 int     ipport_randomcps = 10;  /* user controlled via sysctl */
 107 int     ipport_randomtime = 45; /* user controlled via sysctl */
 108 int     ipport_stoprandom = 0;  /* toggled by ipport_tick */
 109 int     ipport_tcpallocs;
 110 int     ipport_tcplastcount;
 111
 112 #define RANGECHK(var, min, max) \
 113         if ((var) < (min)) { (var) = (min); } \
 114         else if ((var) > (max)) { (var) = (max); }
 115
 116 static int
 117 sysctl_net_ipport_check(SYSCTL_HANDLER_ARGS)
 118 {
 119         int error;
 120
 121         error = sysctl_handle_int(oidp, oidp->oid_arg1, oidp->oid_arg2, req);
 122         if (error == 0) {
 123                 RANGECHK(ipport_lowfirstauto, 1, IPPORT_RESERVED - 1);
 124                 RANGECHK(ipport_lowlastauto, 1, IPPORT_RESERVED - 1);
 125                 RANGECHK(ipport_firstauto, IPPORT_RESERVED, IPPORT_MAX);
 126                 RANGECHK(ipport_lastauto, IPPORT_RESERVED, IPPORT_MAX);
 127                 RANGECHK(ipport_hifirstauto, IPPORT_RESERVED, IPPORT_MAX);
 128                 RANGECHK(ipport_hilastauto, IPPORT_RESERVED, IPPORT_MAX);
 129         }
 130         return (error);
 131 }
 132
 133 #undef RANGECHK
 134
 135 SYSCTL_NODE(_net_inet_ip, IPPROTO_IP, portrange, CTLFLAG_RW, 0, "IP Ports");
 136
 137 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, lowfirst, CTLTYPE_INT|CTLFLAG_RW,
 138            &ipport_lowfirstauto, 0, &sysctl_net_ipport_check, "I", "");
 139 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, lowlast, CTLTYPE_INT|CTLFLAG_RW,
 140            &ipport_lowlastauto, 0, &sysctl_net_ipport_check, "I", "");
 141 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, first, CTLTYPE_INT|CTLFLAG_RW,
 142            &ipport_firstauto, 0, &sysctl_net_ipport_check, "I", "");
 143 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, last, CTLTYPE_INT|CTLFLAG_RW,
 144            &ipport_lastauto, 0, &sysctl_net_ipport_check, "I", "");
 145 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, hifirst, CTLTYPE_INT|CTLFLAG_RW,
 146            &ipport_hifirstauto, 0, &sysctl_net_ipport_check, "I", "");
 147 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, hilast, CTLTYPE_INT|CTLFLAG_RW,
 148            &ipport_hilastauto, 0, &sysctl_net_ipport_check, "I", "");
 149 SYSCTL_INT(_net_inet_ip_portrange, OID_AUTO, reservedhigh,
 150            CTLFLAG_RW|CTLFLAG_SECURE, &ipport_reservedhigh, 0, "");
 151 SYSCTL_INT(_net_inet_ip_portrange, OID_AUTO, reservedlow,
 152            CTLFLAG_RW|CTLFLAG_SECURE, &ipport_reservedlow, 0, "");
 153 SYSCTL_INT(_net_inet_ip_portrange, OID_AUTO, randomized, CTLFLAG_RW,
 154            &ipport_randomized, 0, "Enable random port allocation");
 155 SYSCTL_INT(_net_inet_ip_portrange, OID_AUTO, randomcps, CTLFLAG_RW,
 156            &ipport_randomcps, 0, "Maximum number of random port "
 157            "allocations before switching to a sequental one");
 158 SYSCTL_INT(_net_inet_ip_portrange, OID_AUTO, randomtime, CTLFLAG_RW,
 159            &ipport_randomtime, 0, "Minimum time to keep sequental port "
 160            "allocation before switching to a random one");
 161
 162 /*
 163  * in_pcb.c: manage the Protocol Control Blocks.
 164  *
 165  * NOTE: It is assumed that most of these functions will be called with
 166  * the pcbinfo lock held, and often, the inpcb lock held, as these utility
 167  * functions often modify hash chains or addresses in pcbs.
 168  */
 169
 170 /*
 171  * Allocate a PCB and associate it with the socket.
 172  * On success return with the PCB locked.
 173  */
 174 int
 175 in_pcballoc(struct socket *so, struct inpcbinfo *pcbinfo)
 176 {
 177         struct inpcb *inp;
 178         int error;
 179
 180         INP_INFO_WLOCK_ASSERT(pcbinfo);
 181         error = 0;
 182         inp = uma_zalloc(pcbinfo->ipi_zone, M_NOWAIT);
 183         if (inp == NULL)
 184                 return (ENOBUFS);
 185         bzero(inp, inp_zero_size);
 186         inp->inp_pcbinfo = pcbinfo;
 187         inp->inp_socket = so;
 188 #ifdef MAC
 189         error = mac_init_inpcb(inp, M_NOWAIT);
 190         if (error != 0)
 191                 goto out;
 192         SOCK_LOCK(so);
 193         mac_create_inpcb_from_socket(so, inp);
 194         SOCK_UNLOCK(so);
 195 #endif
 196 #if defined(IPSEC) || defined(FAST_IPSEC)
 197 #ifdef FAST_IPSEC
 198         error = ipsec_init_policy(so, &inp->inp_sp);
 199 #else
 200         error = ipsec_init_pcbpolicy(so, &inp->inp_sp);
 201 #endif
 202         if (error != 0)
 203                 goto out;
 204 #endif /*IPSEC*/
 205 #ifdef INET6
 206         if (INP_SOCKAF(so) == AF_INET6) {
 207                 inp->inp_vflag |= INP_IPV6PROTO;
 208                 if (ip6_v6only)
 209                         inp->inp_flags |= IN6P_IPV6_V6ONLY;
 210         }
 211 #endif
 212         LIST_INSERT_HEAD(pcbinfo->listhead, inp, inp_list);
 213         pcbinfo->ipi_count++;
 214         so->so_pcb = (caddr_t)inp;
 215 #ifdef INET6
 216         if (ip6_auto_flowlabel)
 217                 inp->inp_flags |= IN6P_AUTOFLOWLABEL;
 218 #endif
 219         INP_LOCK(inp);
 220         inp->inp_gencnt = ++pcbinfo->ipi_gencnt;
 221
 222 #if defined(IPSEC) || defined(FAST_IPSEC) || defined(MAC)
 223 out:
 224         if (error != 0)
 225                 uma_zfree(pcbinfo->ipi_zone, inp);
 226 #endif
 227         return (error);
 228 }
 229
 230 int
 231 in_pcbbind(struct inpcb *inp, struct sockaddr *nam, struct ucred *cred)
 232 {
 233         int anonport, error;
 234
 235         INP_INFO_WLOCK_ASSERT(inp->inp_pcbinfo);
 236         INP_LOCK_ASSERT(inp);
 237
 238         if (inp->inp_lport != 0 || inp->inp_laddr.s_addr != INADDR_ANY)
 239                 return (EINVAL);
 240         anonport = inp->inp_lport == 0 && (nam == NULL ||
 241             ((struct sockaddr_in *)nam)->sin_port == 0);
 242         error = in_pcbbind_setup(inp, nam, &inp->inp_laddr.s_addr,
 243             &inp->inp_lport, cred);
 244         if (error)
 245                 return (error);
 246         if (in_pcbinshash(inp) != 0) {
 247                 inp->inp_laddr.s_addr = INADDR_ANY;
 248                 inp->inp_lport = 0;
 249                 return (EAGAIN);
 250         }
 251         if (anonport)
 252                 inp->inp_flags |= INP_ANONPORT;
 253         return (0);
 254 }
 255
 256 /*
 257  * Set up a bind operation on a PCB, performing port allocation
 258  * as required, but do not actually modify the PCB. Callers can
 259  * either complete the bind by setting inp_laddr/inp_lport and
 260  * calling in_pcbinshash(), or they can just use the resulting
 261  * port and address to authorise the sending of a once-off packet.
 262  *
 263  * On error, the values of *laddrp and *lportp are not changed.
 264  */
 265 int
 266 in_pcbbind_setup(struct inpcb *inp, struct sockaddr *nam, in_addr_t *laddrp,
 267     u_short *lportp, struct ucred *cred)
 268 {
 269         struct socket *so = inp->inp_socket;
 270         unsigned short *lastport;
 271         struct sockaddr_in *sin;
 272         struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
 273         struct in_addr laddr;
 274         u_short lport = 0;
 275         int wild = 0, reuseport = (so->so_options & SO_REUSEPORT);
 276         int error, prison = 0;
 277         int dorandom;
 278
 279         INP_INFO_WLOCK_ASSERT(pcbinfo);
 280         INP_LOCK_ASSERT(inp);
 281
 282         if (TAILQ_EMPTY(&in_ifaddrhead)) /* XXX broken! */
 283                 return (EADDRNOTAVAIL);
 284         laddr.s_addr = *laddrp;
 285         if (nam != NULL && laddr.s_addr != INADDR_ANY)
 286                 return (EINVAL);
 287         if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) == 0)
 288                 wild = INPLOOKUP_WILDCARD;
 289         if (nam) {
 290                 sin = (struct sockaddr_in *)nam;
 291                 if (nam->sa_len != sizeof (*sin))
 292                         return (EINVAL);
 293 #ifdef notdef
 294                 /*
 295                  * We should check the family, but old programs
 296                  * incorrectly fail to initialize it.
 297                  */
 298                 if (sin->sin_family != AF_INET)
 299                         return (EAFNOSUPPORT);
 300 #endif
 301                 if (sin->sin_addr.s_addr != INADDR_ANY)
 302                         if (prison_ip(cred, 0, &sin->sin_addr.s_addr))
 303                                 return(EINVAL);
 304                 if (sin->sin_port != *lportp) {
 305                         /* Don't allow the port to change. */
 306                         if (*lportp != 0)
 307                                 return (EINVAL);
 308                         lport = sin->sin_port;
 309                 }
 310                 /* NB: lport is left as 0 if the port isn't being changed. */
 311                 if (IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
 312                         /*
 313                          * Treat SO_REUSEADDR as SO_REUSEPORT for multicast;
 314                          * allow complete duplication of binding if
 315                          * SO_REUSEPORT is set, or if SO_REUSEADDR is set
 316                          * and a multicast address is bound on both
 317                          * new and duplicated sockets.
 318                          */
 319                         if (so->so_options & SO_REUSEADDR)
 320                                 reuseport = SO_REUSEADDR|SO_REUSEPORT;
 321                 } else if (sin->sin_addr.s_addr != INADDR_ANY) {
 322                         sin->sin_port = 0;              /* yech... */
 323                         bzero(&sin->sin_zero, sizeof(sin->sin_zero));
 324                         if (ifa_ifwithaddr((struct sockaddr *)sin) == 0)
 325                                 return (EADDRNOTAVAIL);
 326                 }
 327                 laddr = sin->sin_addr;
 328                 if (lport) {
 329                         struct inpcb *t;
 330                         struct tcptw *tw;
 331
 332                         /* GROSS */
 333                         if (ntohs(lport) <= ipport_reservedhigh &&
 334                             ntohs(lport) >= ipport_reservedlow &&
 335                             priv_check_cred(cred, PRIV_NETINET_RESERVEDPORT,
 336                             SUSER_ALLOWJAIL))
 337                                 return (EACCES);
 338                         if (jailed(cred))
 339                                 prison = 1;
 340                         if (!IN_MULTICAST(ntohl(sin->sin_addr.s_addr)) &&
 341                             suser_cred(so->so_cred, SUSER_ALLOWJAIL) != 0) {
 342                                 t = in_pcblookup_local(inp->inp_pcbinfo,
 343                                     sin->sin_addr, lport,
 344                                     prison ? 0 :  INPLOOKUP_WILDCARD);
 345         /*
 346          * XXX
 347          * This entire block sorely needs a rewrite.
 348          */
 349                                 if (t &&
 350                                     ((t->inp_vflag & INP_TIMEWAIT) == 0) &&
 351                                     (so->so_type != SOCK_STREAM ||
 352                                      ntohl(t->inp_faddr.s_addr) == INADDR_ANY) &&
 353                                     (ntohl(sin->sin_addr.s_addr) != INADDR_ANY ||
 354                                      ntohl(t->inp_laddr.s_addr) != INADDR_ANY ||
 355                                      (t->inp_socket->so_options &
 356                                          SO_REUSEPORT) == 0) &&
 357                                     (so->so_cred->cr_uid !=
 358                                      t->inp_socket->so_cred->cr_uid))
 359                                         return (EADDRINUSE);
 360                         }
 361                         if (prison && prison_ip(cred, 0, &sin->sin_addr.s_addr))
 362                                 return (EADDRNOTAVAIL);
 363                         t = in_pcblookup_local(pcbinfo, sin->sin_addr,
 364                             lport, prison ? 0 : wild);
 365                         if (t && (t->inp_vflag & INP_TIMEWAIT)) {
 366                                 /*
 367                                  * XXXRW: If an incpb has had its timewait
 368                                  * state recycled, we treat the address as
 369                                  * being in use (for now).  This is better
 370                                  * than a panic, but not desirable.
 371                                  */
 372                                 tw = intotw(inp);
 373                                 if (tw == NULL ||
 374                                     (reuseport & tw->tw_so_options) == 0)
 375                                         return (EADDRINUSE);
 376                         } else if (t &&
 377                             (reuseport & t->inp_socket->so_options) == 0) {
 378 #ifdef INET6
 379                                 if (ntohl(sin->sin_addr.s_addr) !=
 380                                     INADDR_ANY ||
 381                                     ntohl(t->inp_laddr.s_addr) !=
 382                                     INADDR_ANY ||
 383                                     INP_SOCKAF(so) ==
 384                                     INP_SOCKAF(t->inp_socket))
 385 #endif
 386                                 return (EADDRINUSE);
 387                         }
 388                 }
 389         }
 390         if (*lportp != 0)
 391                 lport = *lportp;
 392         if (lport == 0) {
 393                 u_short first, last;
 394                 int count;
 395
 396                 if (laddr.s_addr != INADDR_ANY)
 397                         if (prison_ip(cred, 0, &laddr.s_addr))
 398                                 return (EINVAL);
 399
 400                 if (inp->inp_flags & INP_HIGHPORT) {
 401                         first = ipport_hifirstauto;     /* sysctl */
 402                         last  = ipport_hilastauto;
 403                         lastport = &pcbinfo->lasthi;
 404                 } else if (inp->inp_flags & INP_LOWPORT) {
 405                         error = priv_check_cred(cred,
 406                             PRIV_NETINET_RESERVEDPORT, SUSER_ALLOWJAIL);
 407                         if (error)
 408                                 return error;
 409                         first = ipport_lowfirstauto;    /* 1023 */
 410                         last  = ipport_lowlastauto;     /* 600 */
 411                         lastport = &pcbinfo->lastlow;
 412                 } else {
 413                         first = ipport_firstauto;       /* sysctl */
 414                         last  = ipport_lastauto;
 415                         lastport = &pcbinfo->lastport;
 416                 }
 417                 /*
 418                  * For UDP, use random port allocation as long as the user
 419                  * allows it.  For TCP (and as of yet unknown) connections,
 420                  * use random port allocation only if the user allows it AND
 421                  * ipport_tick() allows it.
 422                  */
 423                 if (ipport_randomized &&
 424                         (!ipport_stoprandom || pcbinfo == &udbinfo))
 425                         dorandom = 1;
 426                 else
 427                         dorandom = 0;
 428                 /*
 429                  * It makes no sense to do random port allocation if
 430                  * we have the only port available.
 431                  */
 432                 if (first == last)
 433                         dorandom = 0;
 434                 /* Make sure to not include UDP packets in the count. */
 435                 if (pcbinfo != &udbinfo)
 436                         ipport_tcpallocs++;
 437                 /*
 438                  * Simple check to ensure all ports are not used up causing
 439                  * a deadlock here.
 440                  *
 441                  * We split the two cases (up and down) so that the direction
 442                  * is not being tested on each round of the loop.
 443                  */
 444                 if (first > last) {
 445                         /*
 446                          * counting down
 447                          */
 448                         if (dorandom)
 449                                 *lastport = first -
 450                                             (arc4random() % (first - last));
 451                         count = first - last;
 452
 453                         do {
 454                                 if (count-- < 0)        /* completely used? */
 455                                         return (EADDRNOTAVAIL);
 456                                 --*lastport;
 457                                 if (*lastport > first || *lastport < last)
 458                                         *lastport = first;
 459                                 lport = htons(*lastport);
 460                         } while (in_pcblookup_local(pcbinfo, laddr, lport,
 461                             wild));
 462                 } else {
 463                         /*
 464                          * counting up
 465                          */
 466                         if (dorandom)
 467                                 *lastport = first +
 468                                             (arc4random() % (last - first));
 469                         count = last - first;
 470
 471                         do {
 472                                 if (count-- < 0)        /* completely used? */
 473                                         return (EADDRNOTAVAIL);
 474                                 ++*lastport;
 475                                 if (*lastport < first || *lastport > last)
 476                                         *lastport = first;
 477                                 lport = htons(*lastport);
 478                         } while (in_pcblookup_local(pcbinfo, laddr, lport,
 479                             wild));
 480                 }
 481         }
 482         if (prison_ip(cred, 0, &laddr.s_addr))
 483                 return (EINVAL);
 484         *laddrp = laddr.s_addr;
 485         *lportp = lport;
 486         return (0);
 487 }
 488
 489 /*
 490  * Connect from a socket to a specified address.
 491  * Both address and port must be specified in argument sin.
 492  * If don't have a local address for this socket yet,
 493  * then pick one.
 494  */
 495 int
 496 in_pcbconnect(struct inpcb *inp, struct sockaddr *nam, struct ucred *cred)
 497 {
 498         u_short lport, fport;
 499         in_addr_t laddr, faddr;
 500         int anonport, error;
 501
 502         INP_INFO_WLOCK_ASSERT(inp->inp_pcbinfo);
 503         INP_LOCK_ASSERT(inp);
 504
 505         lport = inp->inp_lport;
 506         laddr = inp->inp_laddr.s_addr;
 507         anonport = (lport == 0);
 508         error = in_pcbconnect_setup(inp, nam, &laddr, &lport, &faddr, &fport,
 509             NULL, cred);
 510         if (error)
 511                 return (error);
 512
 513         /* Do the initial binding of the local address if required. */
 514         if (inp->inp_laddr.s_addr == INADDR_ANY && inp->inp_lport == 0) {
 515                 inp->inp_lport = lport;
 516                 inp->inp_laddr.s_addr = laddr;
 517                 if (in_pcbinshash(inp) != 0) {
 518                         inp->inp_laddr.s_addr = INADDR_ANY;
 519                         inp->inp_lport = 0;
 520                         return (EAGAIN);
 521                 }
 522         }
 523
 524         /* Commit the remaining changes. */
 525         inp->inp_lport = lport;
 526         inp->inp_laddr.s_addr = laddr;
 527         inp->inp_faddr.s_addr = faddr;
 528         inp->inp_fport = fport;
 529         in_pcbrehash(inp);
 530 #ifdef IPSEC
 531         if (inp->inp_socket->so_type == SOCK_STREAM)
 532                 ipsec_pcbconn(inp->inp_sp);
 533 #endif
 534         if (anonport)
 535                 inp->inp_flags |= INP_ANONPORT;
 536         return (0);
 537 }
 538
 539 /*
 540  * Set up for a connect from a socket to the specified address.
 541  * On entry, *laddrp and *lportp should contain the current local
 542  * address and port for the PCB; these are updated to the values
 543  * that should be placed in inp_laddr and inp_lport to complete
 544  * the connect.
 545  *
 546  * On success, *faddrp and *fportp will be set to the remote address
 547  * and port. These are not updated in the error case.
 548  *
 549  * If the operation fails because the connection already exists,
 550  * *oinpp will be set to the PCB of that connection so that the
 551  * caller can decide to override it. In all other cases, *oinpp
 552  * is set to NULL.
 553  */
 554 int
 555 in_pcbconnect_setup(struct inpcb *inp, struct sockaddr *nam,
 556     in_addr_t *laddrp, u_short *lportp, in_addr_t *faddrp, u_short *fportp,
 557     struct inpcb **oinpp, struct ucred *cred)
 558 {
 559         struct sockaddr_in *sin = (struct sockaddr_in *)nam;
 560         struct in_ifaddr *ia;
 561         struct sockaddr_in sa;
 562         struct ucred *socred;
 563         struct inpcb *oinp;
 564         struct in_addr laddr, faddr;
 565         u_short lport, fport;
 566         int error;
 567
 568         INP_INFO_WLOCK_ASSERT(inp->inp_pcbinfo);
 569         INP_LOCK_ASSERT(inp);
 570
 571         if (oinpp != NULL)
 572                 *oinpp = NULL;
 573         if (nam->sa_len != sizeof (*sin))
 574                 return (EINVAL);
 575         if (sin->sin_family != AF_INET)
 576                 return (EAFNOSUPPORT);
 577         if (sin->sin_port == 0)
 578                 return (EADDRNOTAVAIL);
 579         laddr.s_addr = *laddrp;
 580         lport = *lportp;
 581         faddr = sin->sin_addr;
 582         fport = sin->sin_port;
 583         socred = inp->inp_socket->so_cred;
 584         if (laddr.s_addr == INADDR_ANY && jailed(socred)) {
 585                 bzero(&sa, sizeof(sa));
 586                 sa.sin_addr.s_addr = htonl(prison_getip(socred));
 587                 sa.sin_len = sizeof(sa);
 588                 sa.sin_family = AF_INET;
 589                 error = in_pcbbind_setup(inp, (struct sockaddr *)&sa,
 590                     &laddr.s_addr, &lport, cred);
 591                 if (error)
 592                         return (error);
 593         }
 594         if (!TAILQ_EMPTY(&in_ifaddrhead)) {
 595                 /*
 596                  * If the destination address is INADDR_ANY,
 597                  * use the primary local address.
 598                  * If the supplied address is INADDR_BROADCAST,
 599                  * and the primary interface supports broadcast,
 600                  * choose the broadcast address for that interface.
 601                  */
 602                 if (faddr.s_addr == INADDR_ANY)
 603                         faddr = IA_SIN(TAILQ_FIRST(&in_ifaddrhead))->sin_addr;
 604                 else if (faddr.s_addr == (u_long)INADDR_BROADCAST &&
 605                     (TAILQ_FIRST(&in_ifaddrhead)->ia_ifp->if_flags &
 606                     IFF_BROADCAST))
 607                         faddr = satosin(&TAILQ_FIRST(
 608                             &in_ifaddrhead)->ia_broadaddr)->sin_addr;
 609         }
 610         if (laddr.s_addr == INADDR_ANY) {
 611                 ia = (struct in_ifaddr *)0;
 612                 /*
 613                  * If route is known our src addr is taken from the i/f,
 614                  * else punt.
 615                  *
 616                  * Find out route to destination
 617                  */
 618                 if ((inp->inp_socket->so_options & SO_DONTROUTE) == 0)
 619                         ia = ip_rtaddr(faddr);
 620                 /*
 621                  * If we found a route, use the address corresponding to
 622                  * the outgoing interface.
 623                  *
 624                  * Otherwise assume faddr is reachable on a directly connected
 625                  * network and try to find a corresponding interface to take
 626                  * the source address from.
 627                  */
 628                 if (ia == 0) {
 629                         bzero(&sa, sizeof(sa));
 630                         sa.sin_addr = faddr;
 631                         sa.sin_len = sizeof(sa);
 632                         sa.sin_family = AF_INET;
 633
 634                         ia = ifatoia(ifa_ifwithdstaddr(sintosa(&sa)));
 635                         if (ia == 0)
 636                                 ia = ifatoia(ifa_ifwithnet(sintosa(&sa)));
 637                         if (ia == 0)
 638                                 return (ENETUNREACH);
 639                 }
 640                 /*
 641                  * If the destination address is multicast and an outgoing
 642                  * interface has been set as a multicast option, use the
 643                  * address of that interface as our source address.
 644                  */
 645                 if (IN_MULTICAST(ntohl(faddr.s_addr)) &&
 646                     inp->inp_moptions != NULL) {
 647                         struct ip_moptions *imo;
 648                         struct ifnet *ifp;
 649
 650                         imo = inp->inp_moptions;
 651                         if (imo->imo_multicast_ifp != NULL) {
 652                                 ifp = imo->imo_multicast_ifp;
 653                                 TAILQ_FOREACH(ia, &in_ifaddrhead, ia_link)
 654                                         if (ia->ia_ifp == ifp)
 655                                                 break;
 656                                 if (ia == 0)
 657                                         return (EADDRNOTAVAIL);
 658                         }
 659                 }
 660                 laddr = ia->ia_addr.sin_addr;
 661         }
 662
 663         oinp = in_pcblookup_hash(inp->inp_pcbinfo, faddr, fport, laddr, lport,
 664             0, NULL);
 665         if (oinp != NULL) {
 666                 if (oinpp != NULL)
 667                         *oinpp = oinp;
 668                 return (EADDRINUSE);
 669         }
 670         if (lport == 0) {
 671                 error = in_pcbbind_setup(inp, NULL, &laddr.s_addr, &lport,
 672                     cred);
 673                 if (error)
 674                         return (error);
 675         }
 676         *laddrp = laddr.s_addr;
 677         *lportp = lport;
 678         *faddrp = faddr.s_addr;
 679         *fportp = fport;
 680         return (0);
 681 }
 682
 683 void
 684 in_pcbdisconnect(struct inpcb *inp)
 685 {
 686
 687         INP_INFO_WLOCK_ASSERT(inp->inp_pcbinfo);
 688         INP_LOCK_ASSERT(inp);
 689
 690         inp->inp_faddr.s_addr = INADDR_ANY;
 691         inp->inp_fport = 0;
 692         in_pcbrehash(inp);
 693 #ifdef IPSEC
 694         ipsec_pcbdisconn(inp->inp_sp);
 695 #endif
 696 }
 697
 698 /*
 699  * In the old world order, in_pcbdetach() served two functions: to detach the
 700  * pcb from the socket/potentially free the socket, and to free the pcb
 701  * itself.  In the new world order, the protocol code is responsible for
 702  * managing the relationship with the socket, and this code simply frees the
 703  * pcb.
 704  */
 705 void
 706 in_pcbdetach(struct inpcb *inp)
 707 {
 708
 709         KASSERT(inp->inp_socket != NULL, ("in_pcbdetach: inp_socket == NULL"));
 710         inp->inp_socket->so_pcb = NULL;
 711         inp->inp_socket = NULL;
 712 }
 713
 714 void
 715 in_pcbfree(struct inpcb *inp)
 716 {
 717         struct inpcbinfo *ipi = inp->inp_pcbinfo;
 718
 719         KASSERT(inp->inp_socket == NULL, ("in_pcbfree: inp_socket != NULL"));
 720         INP_INFO_WLOCK_ASSERT(ipi);
 721         INP_LOCK_ASSERT(inp);
 722
 723 #if defined(IPSEC) || defined(FAST_IPSEC)
 724         ipsec4_delete_pcbpolicy(inp);
 725 #endif /*IPSEC*/
 726         inp->inp_gencnt = ++ipi->ipi_gencnt;
 727         in_pcbremlists(inp);
 728         if (inp->inp_options)
 729                 (void)m_free(inp->inp_options);
 730         ip_freemoptions(inp->inp_moptions);
 731         inp->inp_vflag = 0;
 732
 733 #ifdef MAC
 734         mac_destroy_inpcb(inp);
 735 #endif
 736         INP_UNLOCK(inp);
 737         uma_zfree(ipi->ipi_zone, inp);
 738 }
 739
 740 /*
 741  * TCP needs to maintain its inpcb structure after the TCP connection has
 742  * been torn down.  However, it must be disconnected from the inpcb hashes as
 743  * it must not prevent binding of future connections to the same port/ip
 744  * combination by other inpcbs.
 745  */
 746 void
 747 in_pcbdrop(struct inpcb *inp)
 748 {
 749
 750         INP_INFO_WLOCK_ASSERT(inp->inp_pcbinfo);
 751         INP_LOCK_ASSERT(inp);
 752
 753         inp->inp_vflag |= INP_DROPPED;
 754         if (inp->inp_lport) {
 755                 struct inpcbport *phd = inp->inp_phd;
 756
 757                 LIST_REMOVE(inp, inp_hash);
 758                 LIST_REMOVE(inp, inp_portlist);
 759                 if (LIST_FIRST(&phd->phd_pcblist) == NULL) {
 760                         LIST_REMOVE(phd, phd_hash);
 761                         free(phd, M_PCB);
 762                 }
 763                 inp->inp_lport = 0;
 764         }
 765 }
 766
 767 struct sockaddr *
 768 in_sockaddr(in_port_t port, struct in_addr *addr_p)
 769 {
 770         struct sockaddr_in *sin;
 771
 772         MALLOC(sin, struct sockaddr_in *, sizeof *sin, M_SONAME,
 773                 M_WAITOK | M_ZERO);
 774         sin->sin_family = AF_INET;
 775         sin->sin_len = sizeof(*sin);
 776         sin->sin_addr = *addr_p;
 777         sin->sin_port = port;
 778
 779         return (struct sockaddr *)sin;
 780 }
 781
 782 /*
 783  * The wrapper function will pass down the pcbinfo for this function to lock.
 784  * The socket must have a valid
 785  * (i.e., non-nil) PCB, but it should be impossible to get an invalid one
 786  * except through a kernel programming error, so it is acceptable to panic
 787  * (or in this case trap) if the PCB is invalid.  (Actually, we don't trap
 788  * because there actually /is/ a programming error somewhere... XXX)
 789  */
 790 int
 791 in_setsockaddr(struct socket *so, struct sockaddr **nam,
 792     struct inpcbinfo *pcbinfo)
 793 {
 794         struct inpcb *inp;
 795         struct in_addr addr;
 796         in_port_t port;
 797
 798         inp = sotoinpcb(so);
 799         KASSERT(inp != NULL, ("in_setsockaddr: inp == NULL"));
 800
 801         INP_LOCK(inp);
 802         port = inp->inp_lport;
 803         addr = inp->inp_laddr;
 804         INP_UNLOCK(inp);
 805
 806         *nam = in_sockaddr(port, &addr);
 807         return 0;
 808 }
 809
 810 /*
 811  * The wrapper function will pass down the pcbinfo for this function to lock.
 812  */
 813 int
 814 in_setpeeraddr(struct socket *so, struct sockaddr **nam,
 815     struct inpcbinfo *pcbinfo)
 816 {
 817         struct inpcb *inp;
 818         struct in_addr addr;
 819         in_port_t port;
 820
 821         inp = sotoinpcb(so);
 822         KASSERT(inp != NULL, ("in_setpeeraddr: inp == NULL"));
 823
 824         INP_LOCK(inp);
 825         port = inp->inp_fport;
 826         addr = inp->inp_faddr;
 827         INP_UNLOCK(inp);
 828
 829         *nam = in_sockaddr(port, &addr);
 830         return 0;
 831 }
 832
 833 void
 834 in_pcbnotifyall(struct inpcbinfo *pcbinfo, struct in_addr faddr, int errno,
 835     struct inpcb *(*notify)(struct inpcb *, int))
 836 {
 837         struct inpcb *inp, *ninp;
 838         struct inpcbhead *head;
 839
 840         INP_INFO_WLOCK(pcbinfo);
 841         head = pcbinfo->listhead;
 842         for (inp = LIST_FIRST(head); inp != NULL; inp = ninp) {
 843                 INP_LOCK(inp);
 844                 ninp = LIST_NEXT(inp, inp_list);
 845 #ifdef INET6
 846                 if ((inp->inp_vflag & INP_IPV4) == 0) {
 847                         INP_UNLOCK(inp);
 848                         continue;
 849                 }
 850 #endif
 851                 if (inp->inp_faddr.s_addr != faddr.s_addr ||
 852                     inp->inp_socket == NULL) {
 853                         INP_UNLOCK(inp);
 854                         continue;
 855                 }
 856                 if ((*notify)(inp, errno))
 857                         INP_UNLOCK(inp);
 858         }
 859         INP_INFO_WUNLOCK(pcbinfo);
 860 }
 861
 862 void
 863 in_pcbpurgeif0(struct inpcbinfo *pcbinfo, struct ifnet *ifp)
 864 {
 865         struct inpcb *inp;
 866         struct ip_moptions *imo;
 867         int i, gap;
 868
 869         INP_INFO_RLOCK(pcbinfo);
 870         LIST_FOREACH(inp, pcbinfo->listhead, inp_list) {
 871                 INP_LOCK(inp);
 872                 imo = inp->inp_moptions;
 873                 if ((inp->inp_vflag & INP_IPV4) &&
 874                     imo != NULL) {
 875                         /*
 876                          * Unselect the outgoing interface if it is being
 877                          * detached.
 878                          */
 879                         if (imo->imo_multicast_ifp == ifp)
 880                                 imo->imo_multicast_ifp = NULL;
 881
 882                         /*
 883                          * Drop multicast group membership if we joined
 884                          * through the interface being detached.
 885                          */
 886                         for (i = 0, gap = 0; i < imo->imo_num_memberships;
 887                             i++) {
 888                                 if (imo->imo_membership[i]->inm_ifp == ifp) {
 889                                         in_delmulti(imo->imo_membership[i]);
 890                                         gap++;
 891                                 } else if (gap != 0)
 892                                         imo->imo_membership[i - gap] =
 893                                             imo->imo_membership[i];
 894                         }
 895                         imo->imo_num_memberships -= gap;
 896                 }
 897                 INP_UNLOCK(inp);
 898         }
 899         INP_INFO_RUNLOCK(pcbinfo);
 900 }
 901
 902 /*
 903  * Lookup a PCB based on the local address and port.
 904  */
 905 #define INP_LOOKUP_MAPPED_PCB_COST      3
 906 struct inpcb *
 907 in_pcblookup_local(struct inpcbinfo *pcbinfo, struct in_addr laddr,
 908     u_int lport_arg, int wild_okay)
 909 {
 910         struct inpcb *inp;
 911 #ifdef INET6
 912         int matchwild = 3 + INP_LOOKUP_MAPPED_PCB_COST;
 913 #else
 914         int matchwild = 3;
 915 #endif
 916         int wildcard;
 917         u_short lport = lport_arg;
 918
 919         INP_INFO_WLOCK_ASSERT(pcbinfo);
 920
 921         if (!wild_okay) {
 922                 struct inpcbhead *head;
 923                 /*
 924                  * Look for an unconnected (wildcard foreign addr) PCB that
 925                  * matches the local address and port we're looking for.
 926                  */
 927                 head = &pcbinfo->hashbase[INP_PCBHASH(INADDR_ANY, lport, 0, pcbinfo->hashmask)];
 928                 LIST_FOREACH(inp, head, inp_hash) {
 929 #ifdef INET6
 930                         if ((inp->inp_vflag & INP_IPV4) == 0)
 931                                 continue;
 932 #endif
 933                         if (inp->inp_faddr.s_addr == INADDR_ANY &&
 934                             inp->inp_laddr.s_addr == laddr.s_addr &&
 935                             inp->inp_lport == lport) {
 936                                 /*
 937                                  * Found.
 938                                  */
 939                                 return (inp);
 940                         }
 941                 }
 942                 /*
 943                  * Not found.
 944                  */
 945                 return (NULL);
 946         } else {
 947                 struct inpcbporthead *porthash;
 948                 struct inpcbport *phd;
 949                 struct inpcb *match = NULL;
 950                 /*
 951                  * Best fit PCB lookup.
 952                  *
 953                  * First see if this local port is in use by looking on the
 954                  * port hash list.
 955                  */
 956                 porthash = &pcbinfo->porthashbase[INP_PCBPORTHASH(lport,
 957                     pcbinfo->porthashmask)];
 958                 LIST_FOREACH(phd, porthash, phd_hash) {
 959                         if (phd->phd_port == lport)
 960                                 break;
 961                 }
 962                 if (phd != NULL) {
 963                         /*
 964                          * Port is in use by one or more PCBs. Look for best
 965                          * fit.
 966                          */
 967                         LIST_FOREACH(inp, &phd->phd_pcblist, inp_portlist) {
 968                                 wildcard = 0;
 969 #ifdef INET6
 970                                 if ((inp->inp_vflag & INP_IPV4) == 0)
 971                                         continue;
 972                                 /*
 973                                  * We never select the PCB that has
 974                                  * INP_IPV6 flag and is bound to :: if
 975                                  * we have another PCB which is bound
 976                                  * to 0.0.0.0.  If a PCB has the
 977                                  * INP_IPV6 flag, then we set its cost
 978                                  * higher than IPv4 only PCBs.
 979                                  *
 980                                  * Note that the case only happens
 981                                  * when a socket is bound to ::, under
 982                                  * the condition that the use of the
 983                                  * mapped address is allowed.
 984                                  */
 985                                 if ((inp->inp_vflag & INP_IPV6) != 0)
 986                                         wildcard += INP_LOOKUP_MAPPED_PCB_COST;
 987 #endif
 988                                 if (inp->inp_faddr.s_addr != INADDR_ANY)
 989                                         wildcard++;
 990                                 if (inp->inp_laddr.s_addr != INADDR_ANY) {
 991                                         if (laddr.s_addr == INADDR_ANY)
 992                                                 wildcard++;
 993                                         else if (inp->inp_laddr.s_addr != laddr.s_addr)
 994                                                 continue;
 995                                 } else {
 996                                         if (laddr.s_addr != INADDR_ANY)
 997                                                 wildcard++;
 998                                 }
 999                                 if (wildcard < matchwild) {
1000                                         match = inp;
1001                                         matchwild = wildcard;
1002                                         if (matchwild == 0) {
1003                                                 break;
1004                                         }
1005                                 }
1006                         }
1007                 }
1008                 return (match);
1009         }
1010 }
1011 #undef INP_LOOKUP_MAPPED_PCB_COST
1012
1013 /*
1014  * Lookup PCB in hash list.
1015  */
1016 struct inpcb *
1017 in_pcblookup_hash(struct inpcbinfo *pcbinfo, struct in_addr faddr,
1018     u_int fport_arg, struct in_addr laddr, u_int lport_arg, int wildcard,
1019     struct ifnet *ifp)
1020 {
1021         struct inpcbhead *head;
1022         struct inpcb *inp;
1023         u_short fport = fport_arg, lport = lport_arg;
1024
1025         INP_INFO_RLOCK_ASSERT(pcbinfo);
1026
1027         /*
1028          * First look for an exact match.
1029          */
1030         head = &pcbinfo->hashbase[INP_PCBHASH(faddr.s_addr, lport, fport,
1031             pcbinfo->hashmask)];
1032         LIST_FOREACH(inp, head, inp_hash) {
1033 #ifdef INET6
1034                 if ((inp->inp_vflag & INP_IPV4) == 0)
1035                         continue;
1036 #endif
1037                 if (inp->inp_faddr.s_addr == faddr.s_addr &&
1038                     inp->inp_laddr.s_addr == laddr.s_addr &&
1039                     inp->inp_fport == fport &&
1040                     inp->inp_lport == lport)
1041                         return (inp);
1042         }
1043
1044         /*
1045          * Then look for a wildcard match, if requested.
1046          */
1047         if (wildcard) {
1048                 struct inpcb *local_wild = NULL;
1049 #ifdef INET6
1050                 struct inpcb *local_wild_mapped = NULL;
1051 #endif
1052
1053                 head = &pcbinfo->hashbase[INP_PCBHASH(INADDR_ANY, lport, 0,
1054                     pcbinfo->hashmask)];
1055                 LIST_FOREACH(inp, head, inp_hash) {
1056 #ifdef INET6
1057                         if ((inp->inp_vflag & INP_IPV4) == 0)
1058                                 continue;
1059 #endif
1060                         if (inp->inp_faddr.s_addr == INADDR_ANY &&
1061                             inp->inp_lport == lport) {
1062                                 if (ifp && ifp->if_type == IFT_FAITH &&
1063                                     (inp->inp_flags & INP_FAITH) == 0)
1064                                         continue;
1065                                 if (inp->inp_laddr.s_addr == laddr.s_addr)
1066                                         return (inp);
1067                                 else if (inp->inp_laddr.s_addr == INADDR_ANY) {
1068 #ifdef INET6
1069                                         if (INP_CHECK_SOCKAF(inp->inp_socket,
1070                                                              AF_INET6))
1071                                                 local_wild_mapped = inp;
1072                                         else
1073 #endif
1074                                                 local_wild = inp;
1075                                 }
1076                         }
1077                 }
1078 #ifdef INET6
1079                 if (local_wild == NULL)
1080                         return (local_wild_mapped);
1081 #endif
1082                 return (local_wild);
1083         }
1084         return (NULL);
1085 }
1086
1087 /*
1088  * Insert PCB onto various hash lists.
1089  */
1090 int
1091 in_pcbinshash(struct inpcb *inp)
1092 {
1093         struct inpcbhead *pcbhash;
1094         struct inpcbporthead *pcbporthash;
1095         struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
1096         struct inpcbport *phd;
1097         u_int32_t hashkey_faddr;
1098
1099         INP_INFO_WLOCK_ASSERT(pcbinfo);
1100         INP_LOCK_ASSERT(inp);
1101
1102 #ifdef INET6
1103         if (inp->inp_vflag & INP_IPV6)
1104                 hashkey_faddr = inp->in6p_faddr.s6_addr32[3] /* XXX */;
1105         else
1106 #endif /* INET6 */
1107         hashkey_faddr = inp->inp_faddr.s_addr;
1108
1109         pcbhash = &pcbinfo->hashbase[INP_PCBHASH(hashkey_faddr,
1110                  inp->inp_lport, inp->inp_fport, pcbinfo->hashmask)];
1111
1112         pcbporthash = &pcbinfo->porthashbase[INP_PCBPORTHASH(inp->inp_lport,
1113             pcbinfo->porthashmask)];
1114
1115         /*
1116          * Go through port list and look for a head for this lport.
1117          */
1118         LIST_FOREACH(phd, pcbporthash, phd_hash) {
1119                 if (phd->phd_port == inp->inp_lport)
1120                         break;
1121         }
1122         /*
1123          * If none exists, malloc one and tack it on.
1124          */
1125         if (phd == NULL) {
1126                 MALLOC(phd, struct inpcbport *, sizeof(struct inpcbport), M_PCB, M_NOWAIT);
1127                 if (phd == NULL) {
1128                         return (ENOBUFS); /* XXX */
1129                 }
1130                 phd->phd_port = inp->inp_lport;
1131                 LIST_INIT(&phd->phd_pcblist);
1132                 LIST_INSERT_HEAD(pcbporthash, phd, phd_hash);
1133         }
1134         inp->inp_phd = phd;
1135         LIST_INSERT_HEAD(&phd->phd_pcblist, inp, inp_portlist);
1136         LIST_INSERT_HEAD(pcbhash, inp, inp_hash);
1137         return (0);
1138 }
1139
1140 /*
1141  * Move PCB to the proper hash bucket when { faddr, fport } have  been
1142  * changed. NOTE: This does not handle the case of the lport changing (the
1143  * hashed port list would have to be updated as well), so the lport must
1144  * not change after in_pcbinshash() has been called.
1145  */
1146 void
1147 in_pcbrehash(struct inpcb *inp)
1148 {
1149         struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
1150         struct inpcbhead *head;
1151         u_int32_t hashkey_faddr;
1152
1153         INP_INFO_WLOCK_ASSERT(pcbinfo);
1154         INP_LOCK_ASSERT(inp);
1155
1156 #ifdef INET6
1157         if (inp->inp_vflag & INP_IPV6)
1158                 hashkey_faddr = inp->in6p_faddr.s6_addr32[3] /* XXX */;
1159         else
1160 #endif /* INET6 */
1161         hashkey_faddr = inp->inp_faddr.s_addr;
1162
1163         head = &pcbinfo->hashbase[INP_PCBHASH(hashkey_faddr,
1164                 inp->inp_lport, inp->inp_fport, pcbinfo->hashmask)];
1165
1166         LIST_REMOVE(inp, inp_hash);
1167         LIST_INSERT_HEAD(head, inp, inp_hash);
1168 }
1169
1170 /*
1171  * Remove PCB from various lists.
1172  */
1173 void
1174 in_pcbremlists(struct inpcb *inp)
1175 {
1176         struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
1177
1178         INP_INFO_WLOCK_ASSERT(pcbinfo);
1179         INP_LOCK_ASSERT(inp);
1180
1181         inp->inp_gencnt = ++pcbinfo->ipi_gencnt;
1182         if (inp->inp_lport) {
1183                 struct inpcbport *phd = inp->inp_phd;
1184
1185                 LIST_REMOVE(inp, inp_hash);
1186                 LIST_REMOVE(inp, inp_portlist);
1187                 if (LIST_FIRST(&phd->phd_pcblist) == NULL) {
1188                         LIST_REMOVE(phd, phd_hash);
1189                         free(phd, M_PCB);
1190                 }
1191         }
1192         LIST_REMOVE(inp, inp_list);
1193         pcbinfo->ipi_count--;
1194 }
1195
1196 /*
1197  * A set label operation has occurred at the socket layer, propagate the
1198  * label change into the in_pcb for the socket.
1199  */
1200 void
1201 in_pcbsosetlabel(struct socket *so)
1202 {
1203 #ifdef MAC
1204         struct inpcb *inp;
1205
1206         inp = sotoinpcb(so);
1207         KASSERT(inp != NULL, ("in_pcbsosetlabel: so->so_pcb == NULL"));
1208
1209         INP_LOCK(inp);
1210         SOCK_LOCK(so);
1211         mac_inpcb_sosetlabel(so, inp);
1212         SOCK_UNLOCK(so);
1213         INP_UNLOCK(inp);
1214 #endif
1215 }
1216
1217 /*
1218  * ipport_tick runs once per second, determining if random port allocation
1219  * should be continued.  If more than ipport_randomcps ports have been
1220  * allocated in the last second, then we return to sequential port
1221  * allocation. We return to random allocation only once we drop below
1222  * ipport_randomcps for at least ipport_randomtime seconds.
1223  */
1224 void
1225 ipport_tick(void *xtp)
1226 {
1227
1228         if (ipport_tcpallocs <= ipport_tcplastcount + ipport_randomcps) {
1229                 if (ipport_stoprandom > 0)
1230                         ipport_stoprandom--;
1231         } else
1232                 ipport_stoprandom = ipport_randomtime;
1233         ipport_tcplastcount = ipport_tcpallocs;
1234         callout_reset(&ipport_tick_callout, hz, ipport_tick, NULL);
1235 }