lib/sockunion.c

   1 /* Socket union related function.
   2  * Copyright (c) 1997, 98 Kunihiro Ishiguro
   3  *
   4  * This file is part of GNU Zebra.
   5  *
   6  * GNU Zebra is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License as published by the
   8  * Free Software Foundation; either version 2, or (at your option) any
   9  * later version.
  10  *
  11  * GNU Zebra is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with GNU Zebra; see the file COPYING.  If not, write to the Free
  18  * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
  19  * 02111-1307, USA.
  20  */
  21
  22 #include <zebra.h>
  23
  24 #include "prefix.h"
  25 #include "vty.h"
  26 #include "sockunion.h"
  27 #include "memory.h"
  28 #include "str.h"
  29 #include "log.h"
  30
  31 #ifndef HAVE_INET_ATON
  32 int
  33 inet_aton (const char *cp, struct in_addr *inaddr)
  34 {
  35   int dots = 0;
  36   register u_long addr = 0;
  37   register u_long val = 0, base = 10;
  38
  39   do
  40     {
  41       register char c = *cp;
  42
  43       switch (c)
  44         {
  45         case '0': case '1': case '2': case '3': case '4': case '5':
  46         case '6': case '7': case '8': case '9':
  47           val = (val * base) + (c - '0');
  48           break;
  49         case '.':
  50           if (++dots > 3)
  51             return 0;
  52         case '\0':
  53           if (val > 255)
  54             return 0;
  55           addr = addr << 8 | val;
  56           val = 0;
  57           break;
  58         default:
  59           return 0;
  60         }
  61     } while (*cp++) ;
  62
  63   if (dots < 3)
  64     addr <<= 8 * (3 - dots);
  65   if (inaddr)
  66     inaddr->s_addr = htonl (addr);
  67   return 1;
  68 }
  69 #endif /* ! HAVE_INET_ATON */
  70
  71
  72 #ifndef HAVE_INET_PTON
  73 int
  74 inet_pton (int family, const char *strptr, void *addrptr)
  75 {
  76   if (family == AF_INET)
  77     {
  78       struct in_addr in_val;
  79
  80       if (inet_aton (strptr, &in_val))
  81         {
  82           memcpy (addrptr, &in_val, sizeof (struct in_addr));
  83           return 1;
  84         }
  85       return 0;
  86     }
  87   errno = EAFNOSUPPORT;
  88   return -1;
  89 }
  90 #endif /* ! HAVE_INET_PTON */
  91
  92 #ifndef HAVE_INET_NTOP
  93 const char *
  94 inet_ntop (int family, const void *addrptr, char *strptr, size_t len)
  95 {
  96   unsigned char *p = (unsigned char *) addrptr;
  97
  98   if (family == AF_INET)
  99     {
 100       char temp[INET_ADDRSTRLEN];
 101
 102       snprintf(temp, sizeof(temp), "%d.%d.%d.%d", p[0], p[1], p[2], p[3]);
 103
 104       if (strlen(temp) >= len)
 105         {
 106           errno = ENOSPC;
 107           return NULL;
 108         }
 109       strcpy(strptr, temp);
 110       return strptr;
 111     }
 112
 113   errno = EAFNOSUPPORT;
 114   return NULL;
 115 }
 116 #endif /* ! HAVE_INET_NTOP */
 117
 118 const char *
 119 inet_sutop (union sockunion *su, char *str)
 120 {
 121   switch (su->sa.sa_family)
 122     {
 123     case AF_INET:
 124       inet_ntop (AF_INET, &su->sin.sin_addr, str, INET_ADDRSTRLEN);
 125       break;
 126 #ifdef HAVE_IPV6
 127     case AF_INET6:
 128       inet_ntop (AF_INET6, &su->sin6.sin6_addr, str, INET6_ADDRSTRLEN);
 129       break;
 130 #endif /* HAVE_IPV6 */
 131     }
 132   return str;
 133 }
 134
 135 int
 136 str2sockunion (const char *str, union sockunion *su)
 137 {
 138   int ret;
 139
 140   memset (su, 0, sizeof (union sockunion));
 141
 142   ret = inet_pton (AF_INET, str, &su->sin.sin_addr);
 143   if (ret > 0)                  /* Valid IPv4 address format. */
 144     {
 145       su->sin.sin_family = AF_INET;
 146 #ifdef HAVE_STRUCT_SOCKADDR_IN_SIN_LEN
 147       su->sin.sin_len = sizeof(struct sockaddr_in);
 148 #endif /* HAVE_STRUCT_SOCKADDR_IN_SIN_LEN */
 149       return 0;
 150     }
 151 #ifdef HAVE_IPV6
 152   ret = inet_pton (AF_INET6, str, &su->sin6.sin6_addr);
 153   if (ret > 0)                  /* Valid IPv6 address format. */
 154     {
 155       su->sin6.sin6_family = AF_INET6;
 156 #ifdef SIN6_LEN
 157       su->sin6.sin6_len = sizeof(struct sockaddr_in6);
 158 #endif /* SIN6_LEN */
 159       return 0;
 160     }
 161 #endif /* HAVE_IPV6 */
 162   return -1;
 163 }
 164
 165 const char *
 166 sockunion2str (union sockunion *su, char *buf, size_t len)
 167 {
 168   if  (su->sa.sa_family == AF_INET)
 169     return inet_ntop (AF_INET, &su->sin.sin_addr, buf, len);
 170 #ifdef HAVE_IPV6
 171   else if (su->sa.sa_family == AF_INET6)
 172     return inet_ntop (AF_INET6, &su->sin6.sin6_addr, buf, len);
 173 #endif /* HAVE_IPV6 */
 174   return NULL;
 175 }
 176
 177 union sockunion *
 178 sockunion_str2su (const char *str)
 179 {
 180   int ret;
 181   union sockunion *su;
 182
 183   su = XCALLOC (MTYPE_SOCKUNION, sizeof (union sockunion));
 184
 185   ret = inet_pton (AF_INET, str, &su->sin.sin_addr);
 186   if (ret > 0)                  /* Valid IPv4 address format. */
 187     {
 188       su->sin.sin_family = AF_INET;
 189 #ifdef HAVE_STRUCT_SOCKADDR_IN_SIN_LEN
 190       su->sin.sin_len = sizeof(struct sockaddr_in);
 191 #endif /* HAVE_STRUCT_SOCKADDR_IN_SIN_LEN */
 192       return su;
 193     }
 194 #ifdef HAVE_IPV6
 195   ret = inet_pton (AF_INET6, str, &su->sin6.sin6_addr);
 196   if (ret > 0)                  /* Valid IPv6 address format. */
 197     {
 198       su->sin6.sin6_family = AF_INET6;
 199 #ifdef SIN6_LEN
 200       su->sin6.sin6_len = sizeof(struct sockaddr_in6);
 201 #endif /* SIN6_LEN */
 202       return su;
 203     }
 204 #endif /* HAVE_IPV6 */
 205
 206   XFREE (MTYPE_SOCKUNION, su);
 207   return NULL;
 208 }
 209
 210 char *
 211 sockunion_su2str (union sockunion *su)
 212 {
 213   char str[SU_ADDRSTRLEN];
 214
 215   switch (su->sa.sa_family)
 216     {
 217     case AF_INET:
 218       inet_ntop (AF_INET, &su->sin.sin_addr, str, sizeof (str));
 219       break;
 220 #ifdef HAVE_IPV6
 221     case AF_INET6:
 222       inet_ntop (AF_INET6, &su->sin6.sin6_addr, str, sizeof (str));
 223       break;
 224 #endif /* HAVE_IPV6 */
 225     }
 226   return XSTRDUP (MTYPE_TMP, str);
 227 }
 228
 229 /* Convert IPv4 compatible IPv6 address to IPv4 address. */
 230 static void
 231 sockunion_normalise_mapped (union sockunion *su)
 232 {
 233   struct sockaddr_in sin;
 234
 235 #ifdef HAVE_IPV6
 236   if (su->sa.sa_family == AF_INET6
 237       && IN6_IS_ADDR_V4MAPPED (&su->sin6.sin6_addr))
 238     {
 239       memset (&sin, 0, sizeof (struct sockaddr_in));
 240       sin.sin_family = AF_INET;
 241       memcpy (&sin.sin_addr, ((char *)&su->sin6.sin6_addr) + 12, 4);
 242       memcpy (su, &sin, sizeof (struct sockaddr_in));
 243     }
 244 #endif /* HAVE_IPV6 */
 245 }
 246
 247 /* Return socket of sockunion. */
 248 int
 249 sockunion_socket (union sockunion *su)
 250 {
 251   int sock;
 252
 253   sock = socket (su->sa.sa_family, SOCK_STREAM, 0);
 254   if (sock < 0)
 255     {
 256       zlog (NULL, LOG_WARNING, "Can't make socket : %s", safe_strerror (errno));
 257       return -1;
 258     }
 259
 260   return sock;
 261 }
 262
 263 /* Return accepted new socket file descriptor. */
 264 int
 265 sockunion_accept (int sock, union sockunion *su)
 266 {
 267   socklen_t len;
 268   int client_sock;
 269
 270   len = sizeof (union sockunion);
 271   client_sock = accept (sock, (struct sockaddr *) su, &len);
 272
 273   sockunion_normalise_mapped (su);
 274   return client_sock;
 275 }
 276
 277 /* Return sizeof union sockunion.  */
 278 static int
 279 sockunion_sizeof (union sockunion *su)
 280 {
 281   int ret;
 282
 283   ret = 0;
 284   switch (su->sa.sa_family)
 285     {
 286     case AF_INET:
 287       ret = sizeof (struct sockaddr_in);
 288       break;
 289 #ifdef HAVE_IPV6
 290     case AF_INET6:
 291       ret = sizeof (struct sockaddr_in6);
 292       break;
 293 #endif /* AF_INET6 */
 294     }
 295   return ret;
 296 }
 297
 298 /* return sockunion structure : this function should be revised. */
 299 static char *
 300 sockunion_log (union sockunion *su)
 301 {
 302   static char buf[SU_ADDRSTRLEN];
 303
 304   switch (su->sa.sa_family)
 305     {
 306     case AF_INET:
 307       snprintf (buf, SU_ADDRSTRLEN, "%s", inet_ntoa (su->sin.sin_addr));
 308       break;
 309 #ifdef HAVE_IPV6
 310     case AF_INET6:
 311       snprintf (buf, SU_ADDRSTRLEN, "%s",
 312                 inet_ntop (AF_INET6, &(su->sin6.sin6_addr), buf, SU_ADDRSTRLEN));
 313       break;
 314 #endif /* HAVE_IPV6 */
 315     default:
 316       snprintf (buf, SU_ADDRSTRLEN, "af_unknown %d ", su->sa.sa_family);
 317       break;
 318     }
 319   return (XSTRDUP (MTYPE_TMP, buf));
 320 }
 321
 322 /* sockunion_connect returns
 323    -1 : error occured
 324    0 : connect success
 325    1 : connect is in progress */
 326 enum connect_result
 327 sockunion_connect (int fd, union sockunion *peersu, unsigned short port,
 328                    unsigned int ifindex)
 329 {
 330   int ret;
 331   int val;
 332   union sockunion su;
 333
 334   memcpy (&su, peersu, sizeof (union sockunion));
 335
 336   switch (su.sa.sa_family)
 337     {
 338     case AF_INET:
 339       su.sin.sin_port = port;
 340       break;
 341 #ifdef HAVE_IPV6
 342     case AF_INET6:
 343       su.sin6.sin6_port  = port;
 344 #ifdef KAME
 345       if (IN6_IS_ADDR_LINKLOCAL(&su.sin6.sin6_addr) && ifindex)
 346         {
 347 #ifdef HAVE_STRUCT_SOCKADDR_IN6_SIN6_SCOPE_ID
 348           /* su.sin6.sin6_scope_id = ifindex; */
 349 #ifdef MUSICA
 350           su.sin6.sin6_scope_id = ifindex;
 351 #endif
 352 #endif /* HAVE_STRUCT_SOCKADDR_IN6_SIN6_SCOPE_ID */
 353 #ifndef MUSICA
 354           SET_IN6_LINKLOCAL_IFINDEX (su.sin6.sin6_addr, ifindex);
 355 #endif
 356         }
 357 #endif /* KAME */
 358       break;
 359 #endif /* HAVE_IPV6 */
 360     }
 361
 362   /* Make socket non-block. */
 363   val = fcntl (fd, F_GETFL, 0);
 364   fcntl (fd, F_SETFL, val|O_NONBLOCK);
 365
 366   /* Call connect function. */
 367   ret = connect (fd, (struct sockaddr *) &su, sockunion_sizeof (&su));
 368
 369   /* Immediate success */
 370   if (ret == 0)
 371     {
 372       fcntl (fd, F_SETFL, val);
 373       return connect_success;
 374     }
 375
 376   /* If connect is in progress then return 1 else it's real error. */
 377   if (ret < 0)
 378     {
 379       if (errno != EINPROGRESS)
 380         {
 381           zlog_info ("can't connect to %s fd %d : %s",
 382                      sockunion_log (&su), fd, safe_strerror (errno));
 383           return connect_error;
 384         }
 385     }
 386
 387   fcntl (fd, F_SETFL, val);
 388
 389   return connect_in_progress;
 390 }
 391
 392 /* Make socket from sockunion union. */
 393 int
 394 sockunion_stream_socket (union sockunion *su)
 395 {
 396   int sock;
 397
 398   if (su->sa.sa_family == 0)
 399     su->sa.sa_family = AF_INET_UNION;
 400
 401   sock = socket (su->sa.sa_family, SOCK_STREAM, 0);
 402
 403   if (sock < 0)
 404     zlog (NULL, LOG_WARNING, "can't make socket sockunion_stream_socket");
 405
 406   return sock;
 407 }
 408
 409 /* Bind socket to specified address. */
 410 int
 411 sockunion_bind (int sock, union sockunion *su, unsigned short port,
 412                 union sockunion *su_addr)
 413 {
 414   int size = 0;
 415   int ret;
 416
 417   if (su->sa.sa_family == AF_INET)
 418     {
 419       size = sizeof (struct sockaddr_in);
 420       su->sin.sin_port = htons (port);
 421 #ifdef HAVE_STRUCT_SOCKADDR_IN_SIN_LEN
 422       su->sin.sin_len = size;
 423 #endif /* HAVE_STRUCT_SOCKADDR_IN_SIN_LEN */
 424       if (su_addr == NULL)
 425         su->sin.sin_addr.s_addr = htonl (INADDR_ANY);
 426     }
 427 #ifdef HAVE_IPV6
 428   else if (su->sa.sa_family == AF_INET6)
 429     {
 430       size = sizeof (struct sockaddr_in6);
 431       su->sin6.sin6_port = htons (port);
 432 #ifdef SIN6_LEN
 433       su->sin6.sin6_len = size;
 434 #endif /* SIN6_LEN */
 435       if (su_addr == NULL)
 436         {
 437 #if defined(LINUX_IPV6) || defined(NRL)
 438           memset (&su->sin6.sin6_addr, 0, sizeof (struct in6_addr));
 439 #else
 440           su->sin6.sin6_addr = in6addr_any;
 441 #endif /* LINUX_IPV6 */
 442         }
 443     }
 444 #endif /* HAVE_IPV6 */
 445
 446
 447   ret = bind (sock, (struct sockaddr *)su, size);
 448   if (ret < 0)
 449     zlog (NULL, LOG_WARNING, "can't bind socket : %s", safe_strerror (errno));
 450
 451   return ret;
 452 }
 453
 454 int
 455 sockopt_reuseaddr (int sock)
 456 {
 457   int ret;
 458   int on = 1;
 459
 460   ret = setsockopt (sock, SOL_SOCKET, SO_REUSEADDR,
 461                     (void *) &on, sizeof (on));
 462   if (ret < 0)
 463     {
 464       zlog (NULL, LOG_WARNING, "can't set sockopt SO_REUSEADDR to socket %d", sock);
 465       return -1;
 466     }
 467   return 0;
 468 }
 469
 470 #ifdef SO_REUSEPORT
 471 int
 472 sockopt_reuseport (int sock)
 473 {
 474   int ret;
 475   int on = 1;
 476
 477   ret = setsockopt (sock, SOL_SOCKET, SO_REUSEPORT,
 478                     (void *) &on, sizeof (on));
 479   if (ret < 0)
 480     {
 481       zlog (NULL, LOG_WARNING, "can't set sockopt SO_REUSEPORT to socket %d", sock);
 482       return -1;
 483     }
 484   return 0;
 485 }
 486 #else
 487 int
 488 sockopt_reuseport (int sock)
 489 {
 490   return 0;
 491 }
 492 #endif /* 0 */
 493
 494 int
 495 sockopt_ttl (int family, int sock, int ttl)
 496 {
 497   int ret;
 498
 499 #ifdef IP_TTL
 500   if (family == AF_INET)
 501     {
 502       ret = setsockopt (sock, IPPROTO_IP, IP_TTL,
 503                         (void *) &ttl, sizeof (int));
 504       if (ret < 0)
 505         {
 506           zlog (NULL, LOG_WARNING, "can't set sockopt IP_TTL %d to socket %d", ttl, sock);
 507           return -1;
 508         }
 509       return 0;
 510     }
 511 #endif /* IP_TTL */
 512 #ifdef HAVE_IPV6
 513   if (family == AF_INET6)
 514     {
 515       ret = setsockopt (sock, IPPROTO_IPV6, IPV6_UNICAST_HOPS,
 516                         (void *) &ttl, sizeof (int));
 517       if (ret < 0)
 518         {
 519           zlog (NULL, LOG_WARNING, "can't set sockopt IPV6_UNICAST_HOPS %d to socket %d",
 520                     ttl, sock);
 521           return -1;
 522         }
 523       return 0;
 524     }
 525 #endif /* HAVE_IPV6 */
 526   return 0;
 527 }
 528
 529 /* If same family and same prefix return 1. */
 530 int
 531 sockunion_same (union sockunion *su1, union sockunion *su2)
 532 {
 533   int ret = 0;
 534
 535   if (su1->sa.sa_family != su2->sa.sa_family)
 536     return 0;
 537
 538   switch (su1->sa.sa_family)
 539     {
 540     case AF_INET:
 541       ret = memcmp (&su1->sin.sin_addr, &su2->sin.sin_addr,
 542                     sizeof (struct in_addr));
 543       break;
 544 #ifdef HAVE_IPV6
 545     case AF_INET6:
 546       ret = memcmp (&su1->sin6.sin6_addr, &su2->sin6.sin6_addr,
 547                     sizeof (struct in6_addr));
 548       break;
 549 #endif /* HAVE_IPV6 */
 550     }
 551   if (ret == 0)
 552     return 1;
 553   else
 554     return 0;
 555 }
 556
 557 /* After TCP connection is established.  Get local address and port. */
 558 union sockunion *
 559 sockunion_getsockname (int fd)
 560 {
 561   int ret;
 562   socklen_t len;
 563   union
 564   {
 565     struct sockaddr sa;
 566     struct sockaddr_in sin;
 567 #ifdef HAVE_IPV6
 568     struct sockaddr_in6 sin6;
 569 #endif /* HAVE_IPV6 */
 570     char tmp_buffer[128];
 571   } name;
 572   union sockunion *su;
 573
 574   memset (&name, 0, sizeof name);
 575   len = sizeof name;
 576
 577   ret = getsockname (fd, (struct sockaddr *)&name, &len);
 578   if (ret < 0)
 579     {
 580       zlog_warn ("Can't get local address and port by getsockname: %s",
 581                  safe_strerror (errno));
 582       return NULL;
 583     }
 584
 585   if (name.sa.sa_family == AF_INET)
 586     {
 587       su = XCALLOC (MTYPE_SOCKUNION, sizeof (union sockunion));
 588       memcpy (su, &name, sizeof (struct sockaddr_in));
 589       return su;
 590     }
 591 #ifdef HAVE_IPV6
 592   if (name.sa.sa_family == AF_INET6)
 593     {
 594       su = XCALLOC (MTYPE_SOCKUNION, sizeof (union sockunion));
 595       memcpy (su, &name, sizeof (struct sockaddr_in6));
 596       sockunion_normalise_mapped (su);
 597       return su;
 598     }
 599 #endif /* HAVE_IPV6 */
 600   return NULL;
 601 }
 602
 603 /* After TCP connection is established.  Get remote address and port. */
 604 union sockunion *
 605 sockunion_getpeername (int fd)
 606 {
 607   int ret;
 608   socklen_t len;
 609   union
 610   {
 611     struct sockaddr sa;
 612     struct sockaddr_in sin;
 613 #ifdef HAVE_IPV6
 614     struct sockaddr_in6 sin6;
 615 #endif /* HAVE_IPV6 */
 616     char tmp_buffer[128];
 617   } name;
 618   union sockunion *su;
 619
 620   memset (&name, 0, sizeof name);
 621   len = sizeof name;
 622   ret = getpeername (fd, (struct sockaddr *)&name, &len);
 623   if (ret < 0)
 624     {
 625       zlog (NULL, LOG_WARNING, "Can't get remote address and port: %s",
 626             safe_strerror (errno));
 627       return NULL;
 628     }
 629
 630   if (name.sa.sa_family == AF_INET)
 631     {
 632       su = XCALLOC (MTYPE_SOCKUNION, sizeof (union sockunion));
 633       memcpy (su, &name, sizeof (struct sockaddr_in));
 634       return su;
 635     }
 636 #ifdef HAVE_IPV6
 637   if (name.sa.sa_family == AF_INET6)
 638     {
 639       su = XCALLOC (MTYPE_SOCKUNION, sizeof (union sockunion));
 640       memcpy (su, &name, sizeof (struct sockaddr_in6));
 641       sockunion_normalise_mapped (su);
 642       return su;
 643     }
 644 #endif /* HAVE_IPV6 */
 645   return NULL;
 646 }
 647
 648 /* Print sockunion structure */
 649 static void __attribute__ ((unused))
 650 sockunion_print (union sockunion *su)
 651 {
 652   if (su == NULL)
 653     return;
 654
 655   switch (su->sa.sa_family)
 656     {
 657     case AF_INET:
 658       printf ("%s\n", inet_ntoa (su->sin.sin_addr));
 659       break;
 660 #ifdef HAVE_IPV6
 661     case AF_INET6:
 662       {
 663         char buf [SU_ADDRSTRLEN];
 664
 665         printf ("%s\n", inet_ntop (AF_INET6, &(su->sin6.sin6_addr),
 666                                  buf, sizeof (buf)));
 667       }
 668       break;
 669 #endif /* HAVE_IPV6 */
 670
 671 #ifdef AF_LINK
 672     case AF_LINK:
 673       {
 674         struct sockaddr_dl *sdl;
 675
 676         sdl = (struct sockaddr_dl *)&(su->sa);
 677         printf ("link#%d\n", sdl->sdl_index);
 678       }
 679       break;
 680 #endif /* AF_LINK */
 681     default:
 682       printf ("af_unknown %d\n", su->sa.sa_family);
 683       break;
 684     }
 685 }
 686
 687 #ifdef HAVE_IPV6
 688 static int
 689 in6addr_cmp (struct in6_addr *addr1, struct in6_addr *addr2)
 690 {
 691   unsigned int i;
 692   u_char *p1, *p2;
 693
 694   p1 = (u_char *)addr1;
 695   p2 = (u_char *)addr2;
 696
 697   for (i = 0; i < sizeof (struct in6_addr); i++)
 698     {
 699       if (p1[i] > p2[i])
 700         return 1;
 701       else if (p1[i] < p2[i])
 702         return -1;
 703     }
 704   return 0;
 705 }
 706 #endif /* HAVE_IPV6 */
 707
 708 int
 709 sockunion_cmp (union sockunion *su1, union sockunion *su2)
 710 {
 711   if (su1->sa.sa_family > su2->sa.sa_family)
 712     return 1;
 713   if (su1->sa.sa_family < su2->sa.sa_family)
 714     return -1;
 715
 716   if (su1->sa.sa_family == AF_INET)
 717     {
 718       if (ntohl (su1->sin.sin_addr.s_addr) == ntohl (su2->sin.sin_addr.s_addr))
 719         return 0;
 720       if (ntohl (su1->sin.sin_addr.s_addr) > ntohl (su2->sin.sin_addr.s_addr))
 721         return 1;
 722       else
 723         return -1;
 724     }
 725 #ifdef HAVE_IPV6
 726   if (su1->sa.sa_family == AF_INET6)
 727     return in6addr_cmp (&su1->sin6.sin6_addr, &su2->sin6.sin6_addr);
 728 #endif /* HAVE_IPV6 */
 729   return 0;
 730 }
 731
 732 /* Duplicate sockunion. */
 733 union sockunion *
 734 sockunion_dup (union sockunion *su)
 735 {
 736   union sockunion *dup = XCALLOC (MTYPE_SOCKUNION, sizeof (union sockunion));
 737   memcpy (dup, su, sizeof (union sockunion));
 738   return dup;
 739 }
 740
 741 void
 742 sockunion_free (union sockunion *su)
 743 {
 744   XFREE (MTYPE_SOCKUNION, su);
 745 }