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 along
  17  * with this program; see the file COPYING; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  19  */
  20
  21 #include <zebra.h>
  22
  23 #include "prefix.h"
  24 #include "vty.h"
  25 #include "sockunion.h"
  26 #include "memory.h"
  27 #include "log.h"
  28 #include "jhash.h"
  29 #include "lib_errors.h"
  30 #include "printfrr.h"
  31
  32 DEFINE_MTYPE_STATIC(LIB, SOCKUNION, "Socket union");
  33
  34 const char *inet_sutop(const union sockunion *su, char *str)
  35 {
  36         switch (su->sa.sa_family) {
  37         case AF_INET:
  38                 inet_ntop(AF_INET, &su->sin.sin_addr, str, INET_ADDRSTRLEN);
  39                 break;
  40         case AF_INET6:
  41                 inet_ntop(AF_INET6, &su->sin6.sin6_addr, str, INET6_ADDRSTRLEN);
  42                 break;
  43         }
  44         return str;
  45 }
  46
  47 int str2sockunion(const char *str, union sockunion *su)
  48 {
  49         int ret;
  50
  51         if (str == NULL)
  52                 return -1;
  53
  54         memset(su, 0, sizeof(union sockunion));
  55
  56         ret = inet_pton(AF_INET, str, &su->sin.sin_addr);
  57         if (ret > 0) /* Valid IPv4 address format. */
  58         {
  59                 su->sin.sin_family = AF_INET;
  60 #ifdef HAVE_STRUCT_SOCKADDR_IN_SIN_LEN
  61                 su->sin.sin_len = sizeof(struct sockaddr_in);
  62 #endif /* HAVE_STRUCT_SOCKADDR_IN_SIN_LEN */
  63                 return 0;
  64         }
  65         ret = inet_pton(AF_INET6, str, &su->sin6.sin6_addr);
  66         if (ret > 0) /* Valid IPv6 address format. */
  67         {
  68                 su->sin6.sin6_family = AF_INET6;
  69 #ifdef SIN6_LEN
  70                 su->sin6.sin6_len = sizeof(struct sockaddr_in6);
  71 #endif /* SIN6_LEN */
  72                 return 0;
  73         }
  74         return -1;
  75 }
  76
  77 const char *sockunion2str(const union sockunion *su, char *buf, size_t len)
  78 {
  79         switch (sockunion_family(su)) {
  80         case AF_UNSPEC:
  81                 snprintf(buf, len, "(unspec)");
  82                 return buf;
  83         case AF_INET:
  84                 return inet_ntop(AF_INET, &su->sin.sin_addr, buf, len);
  85         case AF_INET6:
  86                 return inet_ntop(AF_INET6, &su->sin6.sin6_addr, buf, len);
  87         }
  88         snprintf(buf, len, "(af %d)", sockunion_family(su));
  89         return buf;
  90 }
  91
  92 union sockunion *sockunion_str2su(const char *str)
  93 {
  94         union sockunion *su = XCALLOC(MTYPE_SOCKUNION, sizeof(union sockunion));
  95
  96         if (!str2sockunion(str, su))
  97                 return su;
  98
  99         XFREE(MTYPE_SOCKUNION, su);
 100         return NULL;
 101 }
 102
 103 /* Convert IPv4 compatible IPv6 address to IPv4 address. */
 104 static void sockunion_normalise_mapped(union sockunion *su)
 105 {
 106         struct sockaddr_in sin;
 107
 108         if (su->sa.sa_family == AF_INET6
 109             && IN6_IS_ADDR_V4MAPPED(&su->sin6.sin6_addr)) {
 110                 memset(&sin, 0, sizeof(struct sockaddr_in));
 111                 sin.sin_family = AF_INET;
 112                 sin.sin_port = su->sin6.sin6_port;
 113                 memcpy(&sin.sin_addr, ((char *)&su->sin6.sin6_addr) + 12, 4);
 114                 memcpy(su, &sin, sizeof(struct sockaddr_in));
 115         }
 116 }
 117
 118 /* return sockunion structure : this function should be revised. */
 119 static const char *sockunion_log(const union sockunion *su, char *buf,
 120                                  size_t len)
 121 {
 122         switch (su->sa.sa_family) {
 123         case AF_INET:
 124                 return inet_ntop(AF_INET, &su->sin.sin_addr, buf, len);
 125
 126         case AF_INET6:
 127                 return inet_ntop(AF_INET6, &(su->sin6.sin6_addr), buf, len);
 128
 129         default:
 130                 snprintf(buf, len, "af_unknown %d ", su->sa.sa_family);
 131                 return buf;
 132         }
 133 }
 134
 135 /* Return socket of sockunion. */
 136 int sockunion_socket(const union sockunion *su)
 137 {
 138         int sock;
 139
 140         sock = socket(su->sa.sa_family, SOCK_STREAM, 0);
 141         if (sock < 0) {
 142                 char buf[SU_ADDRSTRLEN];
 143                 flog_err(EC_LIB_SOCKET, "Can't make socket for %s : %s",
 144                          sockunion_log(su, buf, SU_ADDRSTRLEN),
 145                          safe_strerror(errno));
 146                 return -1;
 147         }
 148
 149         return sock;
 150 }
 151
 152 /* Return accepted new socket file descriptor. */
 153 int sockunion_accept(int sock, union sockunion *su)
 154 {
 155         socklen_t len;
 156         int client_sock;
 157
 158         len = sizeof(union sockunion);
 159         client_sock = accept(sock, (struct sockaddr *)su, &len);
 160
 161         sockunion_normalise_mapped(su);
 162         return client_sock;
 163 }
 164
 165 /* Return sizeof union sockunion.  */
 166 int sockunion_sizeof(const union sockunion *su)
 167 {
 168         int ret;
 169
 170         ret = 0;
 171         switch (su->sa.sa_family) {
 172         case AF_INET:
 173                 ret = sizeof(struct sockaddr_in);
 174                 break;
 175         case AF_INET6:
 176                 ret = sizeof(struct sockaddr_in6);
 177                 break;
 178         }
 179         return ret;
 180 }
 181
 182 /* Performs a non-blocking connect().  */
 183 enum connect_result sockunion_connect(int fd, const union sockunion *peersu,
 184                                       unsigned short port, ifindex_t ifindex)
 185 {
 186         int ret;
 187         union sockunion su;
 188
 189         memcpy(&su, peersu, sizeof(union sockunion));
 190
 191         switch (su.sa.sa_family) {
 192         case AF_INET:
 193                 su.sin.sin_port = port;
 194                 break;
 195         case AF_INET6:
 196                 su.sin6.sin6_port = port;
 197 #ifdef KAME
 198                 if (IN6_IS_ADDR_LINKLOCAL(&su.sin6.sin6_addr) && ifindex) {
 199                         su.sin6.sin6_scope_id = ifindex;
 200                         SET_IN6_LINKLOCAL_IFINDEX(su.sin6.sin6_addr, ifindex);
 201                 }
 202 #endif /* KAME */
 203                 break;
 204         }
 205
 206         /* Call connect function. */
 207         ret = connect(fd, (struct sockaddr *)&su, sockunion_sizeof(&su));
 208
 209         /* Immediate success */
 210         if (ret == 0)
 211                 return connect_success;
 212
 213         /* If connect is in progress then return 1 else it's real error. */
 214         if (ret < 0) {
 215                 if (errno != EINPROGRESS) {
 216                         char str[SU_ADDRSTRLEN];
 217                         zlog_info("can't connect to %s fd %d : %s",
 218                                   sockunion_log(&su, str, sizeof(str)), fd,
 219                                   safe_strerror(errno));
 220                         return connect_error;
 221                 }
 222         }
 223
 224         return connect_in_progress;
 225 }
 226
 227 /* Make socket from sockunion union. */
 228 int sockunion_stream_socket(union sockunion *su)
 229 {
 230         int sock;
 231
 232         if (su->sa.sa_family == 0)
 233                 su->sa.sa_family = AF_INET_UNION;
 234
 235         sock = socket(su->sa.sa_family, SOCK_STREAM, 0);
 236
 237         if (sock < 0)
 238                 flog_err(EC_LIB_SOCKET,
 239                          "can't make socket sockunion_stream_socket");
 240
 241         return sock;
 242 }
 243
 244 /* Bind socket to specified address. */
 245 int sockunion_bind(int sock, union sockunion *su, unsigned short port,
 246                    union sockunion *su_addr)
 247 {
 248         int size = 0;
 249         int ret;
 250
 251         if (su->sa.sa_family == AF_INET) {
 252                 size = sizeof(struct sockaddr_in);
 253                 su->sin.sin_port = htons(port);
 254 #ifdef HAVE_STRUCT_SOCKADDR_IN_SIN_LEN
 255                 su->sin.sin_len = size;
 256 #endif /* HAVE_STRUCT_SOCKADDR_IN_SIN_LEN */
 257                 if (su_addr == NULL)
 258                         sockunion2ip(su) = htonl(INADDR_ANY);
 259         } else if (su->sa.sa_family == AF_INET6) {
 260                 size = sizeof(struct sockaddr_in6);
 261                 su->sin6.sin6_port = htons(port);
 262 #ifdef SIN6_LEN
 263                 su->sin6.sin6_len = size;
 264 #endif /* SIN6_LEN */
 265                 if (su_addr == NULL) {
 266 #ifdef LINUX_IPV6
 267                         memset(&su->sin6.sin6_addr, 0, sizeof(struct in6_addr));
 268 #else
 269                         su->sin6.sin6_addr = in6addr_any;
 270 #endif /* LINUX_IPV6 */
 271                 }
 272         }
 273
 274         ret = bind(sock, (struct sockaddr *)su, size);
 275         if (ret < 0) {
 276                 char buf[SU_ADDRSTRLEN];
 277                 flog_err(EC_LIB_SOCKET, "can't bind socket for %s : %s",
 278                          sockunion_log(su, buf, SU_ADDRSTRLEN),
 279                          safe_strerror(errno));
 280         }
 281
 282         return ret;
 283 }
 284
 285 int sockopt_reuseaddr(int sock)
 286 {
 287         int ret;
 288         int on = 1;
 289
 290         ret = setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (void *)&on,
 291                          sizeof(on));
 292         if (ret < 0) {
 293                 flog_err(EC_LIB_SOCKET,
 294                          "can't set sockopt SO_REUSEADDR to socket %d", sock);
 295                 return -1;
 296         }
 297         return 0;
 298 }
 299
 300 #ifdef SO_REUSEPORT
 301 int sockopt_reuseport(int sock)
 302 {
 303         int ret;
 304         int on = 1;
 305
 306         ret = setsockopt(sock, SOL_SOCKET, SO_REUSEPORT, (void *)&on,
 307                          sizeof(on));
 308         if (ret < 0) {
 309                 flog_err(EC_LIB_SOCKET,
 310                          "can't set sockopt SO_REUSEPORT to socket %d", sock);
 311                 return -1;
 312         }
 313         return 0;
 314 }
 315 #else
 316 int sockopt_reuseport(int sock)
 317 {
 318         return 0;
 319 }
 320 #endif /* 0 */
 321
 322 int sockopt_ttl(int family, int sock, int ttl)
 323 {
 324         int ret;
 325
 326 #ifdef IP_TTL
 327         if (family == AF_INET) {
 328                 ret = setsockopt(sock, IPPROTO_IP, IP_TTL, (void *)&ttl,
 329                                  sizeof(int));
 330                 if (ret < 0) {
 331                         flog_err(EC_LIB_SOCKET,
 332                                  "can't set sockopt IP_TTL %d to socket %d",
 333                                  ttl, sock);
 334                         return -1;
 335                 }
 336                 return 0;
 337         }
 338 #endif /* IP_TTL */
 339         if (family == AF_INET6) {
 340                 ret = setsockopt(sock, IPPROTO_IPV6, IPV6_UNICAST_HOPS,
 341                                  (void *)&ttl, sizeof(int));
 342                 if (ret < 0) {
 343                         flog_err(
 344                                 EC_LIB_SOCKET,
 345                                 "can't set sockopt IPV6_UNICAST_HOPS %d to socket %d",
 346                                 ttl, sock);
 347                         return -1;
 348                 }
 349                 return 0;
 350         }
 351         return 0;
 352 }
 353
 354 int sockopt_minttl(int family, int sock, int minttl)
 355 {
 356 #ifdef IP_MINTTL
 357         if (family == AF_INET) {
 358                 int ret = setsockopt(sock, IPPROTO_IP, IP_MINTTL, &minttl,
 359                                      sizeof(minttl));
 360                 if (ret < 0)
 361                         flog_err(
 362                                 EC_LIB_SOCKET,
 363                                 "can't set sockopt IP_MINTTL to %d on socket %d: %s",
 364                                 minttl, sock, safe_strerror(errno));
 365                 return ret;
 366         }
 367 #endif /* IP_MINTTL */
 368 #ifdef IPV6_MINHOPCOUNT
 369         if (family == AF_INET6) {
 370                 int ret = setsockopt(sock, IPPROTO_IPV6, IPV6_MINHOPCOUNT,
 371                                      &minttl, sizeof(minttl));
 372                 if (ret < 0)
 373                         flog_err(
 374                                 EC_LIB_SOCKET,
 375                                 "can't set sockopt IPV6_MINHOPCOUNT to %d on socket %d: %s",
 376                                 minttl, sock, safe_strerror(errno));
 377                 return ret;
 378         }
 379 #endif
 380
 381         errno = EOPNOTSUPP;
 382         return -1;
 383 }
 384
 385 int sockopt_v6only(int family, int sock)
 386 {
 387         int ret, on = 1;
 388
 389 #ifdef IPV6_V6ONLY
 390         if (family == AF_INET6) {
 391                 ret = setsockopt(sock, IPPROTO_IPV6, IPV6_V6ONLY, (void *)&on,
 392                                  sizeof(int));
 393                 if (ret < 0) {
 394                         flog_err(EC_LIB_SOCKET,
 395                                  "can't set sockopt IPV6_V6ONLY to socket %d",
 396                                  sock);
 397                         return -1;
 398                 }
 399                 return 0;
 400         }
 401 #endif /* IPV6_V6ONLY */
 402         return 0;
 403 }
 404
 405 /* If same family and same prefix return 1. */
 406 int sockunion_same(const union sockunion *su1, const union sockunion *su2)
 407 {
 408         int ret = 0;
 409
 410         if (su1->sa.sa_family != su2->sa.sa_family)
 411                 return 0;
 412
 413         switch (su1->sa.sa_family) {
 414         case AF_INET:
 415                 ret = memcmp(&su1->sin.sin_addr, &su2->sin.sin_addr,
 416                              sizeof(struct in_addr));
 417                 break;
 418         case AF_INET6:
 419                 ret = memcmp(&su1->sin6.sin6_addr, &su2->sin6.sin6_addr,
 420                              sizeof(struct in6_addr));
 421                 if ((ret == 0) && IN6_IS_ADDR_LINKLOCAL(&su1->sin6.sin6_addr)) {
 422                         /* compare interface indices */
 423                         if (su1->sin6.sin6_scope_id && su2->sin6.sin6_scope_id)
 424                                 ret = (su1->sin6.sin6_scope_id
 425                                        == su2->sin6.sin6_scope_id)
 426                                               ? 0
 427                                               : 1;
 428                 }
 429                 break;
 430         }
 431         if (ret == 0)
 432                 return 1;
 433         else
 434                 return 0;
 435 }
 436
 437 unsigned int sockunion_hash(const union sockunion *su)
 438 {
 439         switch (sockunion_family(su)) {
 440         case AF_INET:
 441                 return jhash_1word(su->sin.sin_addr.s_addr, 0);
 442         case AF_INET6:
 443                 return jhash2(su->sin6.sin6_addr.s6_addr32,
 444                               array_size(su->sin6.sin6_addr.s6_addr32), 0);
 445         }
 446         return 0;
 447 }
 448
 449 size_t family2addrsize(int family)
 450 {
 451         switch (family) {
 452         case AF_INET:
 453                 return sizeof(struct in_addr);
 454         case AF_INET6:
 455                 return sizeof(struct in6_addr);
 456         }
 457         return 0;
 458 }
 459
 460 size_t sockunion_get_addrlen(const union sockunion *su)
 461 {
 462         return family2addrsize(sockunion_family(su));
 463 }
 464
 465 const uint8_t *sockunion_get_addr(const union sockunion *su)
 466 {
 467         switch (sockunion_family(su)) {
 468         case AF_INET:
 469                 return (const uint8_t *)&su->sin.sin_addr.s_addr;
 470         case AF_INET6:
 471                 return (const uint8_t *)&su->sin6.sin6_addr;
 472         }
 473         return NULL;
 474 }
 475
 476 void sockunion_set(union sockunion *su, int family, const uint8_t *addr,
 477                    size_t bytes)
 478 {
 479         if (family2addrsize(family) != bytes)
 480                 return;
 481
 482         sockunion_family(su) = family;
 483         switch (family) {
 484         case AF_INET:
 485                 memcpy(&su->sin.sin_addr.s_addr, addr, bytes);
 486                 break;
 487         case AF_INET6:
 488                 memcpy(&su->sin6.sin6_addr, addr, bytes);
 489                 break;
 490         }
 491 }
 492
 493 /* After TCP connection is established.  Get local address and port. */
 494 union sockunion *sockunion_getsockname(int fd)
 495 {
 496         int ret;
 497         socklen_t len;
 498         union {
 499                 struct sockaddr sa;
 500                 struct sockaddr_in sin;
 501                 struct sockaddr_in6 sin6;
 502                 char tmp_buffer[128];
 503         } name;
 504         union sockunion *su;
 505
 506         memset(&name, 0, sizeof(name));
 507         len = sizeof(name);
 508
 509         ret = getsockname(fd, (struct sockaddr *)&name, &len);
 510         if (ret < 0) {
 511                 flog_err(EC_LIB_SOCKET,
 512                          "Can't get local address and port by getsockname: %s",
 513                          safe_strerror(errno));
 514                 return NULL;
 515         }
 516
 517         if (name.sa.sa_family == AF_INET) {
 518                 su = XCALLOC(MTYPE_SOCKUNION, sizeof(union sockunion));
 519                 memcpy(su, &name, sizeof(struct sockaddr_in));
 520                 return su;
 521         }
 522         if (name.sa.sa_family == AF_INET6) {
 523                 su = XCALLOC(MTYPE_SOCKUNION, sizeof(union sockunion));
 524                 memcpy(su, &name, sizeof(struct sockaddr_in6));
 525                 sockunion_normalise_mapped(su);
 526                 return su;
 527         }
 528         return NULL;
 529 }
 530
 531 /* After TCP connection is established.  Get remote address and port. */
 532 union sockunion *sockunion_getpeername(int fd)
 533 {
 534         int ret;
 535         socklen_t len;
 536         union {
 537                 struct sockaddr sa;
 538                 struct sockaddr_in sin;
 539                 struct sockaddr_in6 sin6;
 540                 char tmp_buffer[128];
 541         } name;
 542         union sockunion *su;
 543
 544         memset(&name, 0, sizeof(name));
 545         len = sizeof(name);
 546         ret = getpeername(fd, (struct sockaddr *)&name, &len);
 547         if (ret < 0) {
 548                 flog_err(EC_LIB_SOCKET, "Can't get remote address and port: %s",
 549                          safe_strerror(errno));
 550                 return NULL;
 551         }
 552
 553         if (name.sa.sa_family == AF_INET) {
 554                 su = XCALLOC(MTYPE_SOCKUNION, sizeof(union sockunion));
 555                 memcpy(su, &name, sizeof(struct sockaddr_in));
 556                 return su;
 557         }
 558         if (name.sa.sa_family == AF_INET6) {
 559                 su = XCALLOC(MTYPE_SOCKUNION, sizeof(union sockunion));
 560                 memcpy(su, &name, sizeof(struct sockaddr_in6));
 561                 sockunion_normalise_mapped(su);
 562                 return su;
 563         }
 564         return NULL;
 565 }
 566
 567 /* Print sockunion structure */
 568 static void __attribute__((unused)) sockunion_print(const union sockunion *su)
 569 {
 570         if (su == NULL)
 571                 return;
 572
 573         switch (su->sa.sa_family) {
 574         case AF_INET:
 575                 printf("%pI4\n", &su->sin.sin_addr);
 576                 break;
 577         case AF_INET6:
 578                 printf("%pI6\n", &su->sin6.sin6_addr);
 579                 break;
 580 #ifdef AF_LINK
 581         case AF_LINK: {
 582                 struct sockaddr_dl *sdl;
 583
 584                 sdl = (struct sockaddr_dl *)&(su->sa);
 585                 printf("link#%d\n", sdl->sdl_index);
 586         } break;
 587 #endif /* AF_LINK */
 588         default:
 589                 printf("af_unknown %d\n", su->sa.sa_family);
 590                 break;
 591         }
 592 }
 593
 594 int in6addr_cmp(const struct in6_addr *addr1, const struct in6_addr *addr2)
 595 {
 596         unsigned int i;
 597         const uint8_t *p1, *p2;
 598
 599         p1 = (const uint8_t *)addr1;
 600         p2 = (const uint8_t *)addr2;
 601
 602         for (i = 0; i < sizeof(struct in6_addr); i++) {
 603                 if (p1[i] > p2[i])
 604                         return 1;
 605                 else if (p1[i] < p2[i])
 606                         return -1;
 607         }
 608         return 0;
 609 }
 610
 611 int sockunion_cmp(const union sockunion *su1, const union sockunion *su2)
 612 {
 613         if (su1->sa.sa_family > su2->sa.sa_family)
 614                 return 1;
 615         if (su1->sa.sa_family < su2->sa.sa_family)
 616                 return -1;
 617
 618         if (su1->sa.sa_family == AF_INET) {
 619                 if (ntohl(sockunion2ip(su1)) == ntohl(sockunion2ip(su2)))
 620                         return 0;
 621                 if (ntohl(sockunion2ip(su1)) > ntohl(sockunion2ip(su2)))
 622                         return 1;
 623                 else
 624                         return -1;
 625         }
 626         if (su1->sa.sa_family == AF_INET6)
 627                 return in6addr_cmp(&su1->sin6.sin6_addr, &su2->sin6.sin6_addr);
 628         return 0;
 629 }
 630
 631 /* Duplicate sockunion. */
 632 union sockunion *sockunion_dup(const union sockunion *su)
 633 {
 634         union sockunion *dup =
 635                 XCALLOC(MTYPE_SOCKUNION, sizeof(union sockunion));
 636         memcpy(dup, su, sizeof(union sockunion));
 637         return dup;
 638 }
 639
 640 void sockunion_free(union sockunion *su)
 641 {
 642         XFREE(MTYPE_SOCKUNION, su);
 643 }
 644
 645 void sockunion_init(union sockunion *su)
 646 {
 647         memset(su, 0, sizeof(union sockunion));
 648 }
 649
 650 printfrr_ext_autoreg_p("SU", printfrr_psu);
 651 static ssize_t printfrr_psu(struct fbuf *buf, struct printfrr_eargs *ea,
 652                             const void *ptr)
 653 {
 654         const union sockunion *su = ptr;
 655         bool include_port = false, include_scope = false;
 656         bool endflags = false;
 657         ssize_t ret = 0;
 658         char cbuf[INET6_ADDRSTRLEN];
 659
 660         if (!su)
 661                 return bputs(buf, "(null)");
 662
 663         while (!endflags) {
 664                 switch (*ea->fmt) {
 665                 case 'p':
 666                         ea->fmt++;
 667                         include_port = true;
 668                         break;
 669                 case 's':
 670                         ea->fmt++;
 671                         include_scope = true;
 672                         break;
 673                 default:
 674                         endflags = true;
 675                         break;
 676                 }
 677         }
 678
 679         switch (sockunion_family(su)) {
 680         case AF_UNSPEC:
 681                 ret += bputs(buf, "(unspec)");
 682                 break;
 683         case AF_INET:
 684                 inet_ntop(AF_INET, &su->sin.sin_addr, cbuf, sizeof(cbuf));
 685                 ret += bputs(buf, cbuf);
 686                 if (include_port)
 687                         ret += bprintfrr(buf, ":%d", ntohs(su->sin.sin_port));
 688                 break;
 689         case AF_INET6:
 690                 if (include_port)
 691                         ret += bputch(buf, '[');
 692                 inet_ntop(AF_INET6, &su->sin6.sin6_addr, cbuf, sizeof(cbuf));
 693                 ret += bputs(buf, cbuf);
 694                 if (include_scope && su->sin6.sin6_scope_id)
 695                         ret += bprintfrr(buf, "%%%u",
 696                                          (unsigned int)su->sin6.sin6_scope_id);
 697                 if (include_port)
 698                         ret += bprintfrr(buf, "]:%d",
 699                                          ntohs(su->sin6.sin6_port));
 700                 break;
 701         case AF_UNIX: {
 702                 int len;
 703 #ifdef __linux__
 704                 if (su->sun.sun_path[0] == '\0' && su->sun.sun_path[1]) {
 705                         len = strnlen(su->sun.sun_path + 1,
 706                                       sizeof(su->sun.sun_path) - 1);
 707                         ret += bprintfrr(buf, "@%*pSE", len,
 708                                          su->sun.sun_path + 1);
 709                         break;
 710                 }
 711 #endif
 712                 len = strnlen(su->sun.sun_path, sizeof(su->sun.sun_path));
 713                 ret += bprintfrr(buf, "%*pSE", len, su->sun.sun_path);
 714                 break;
 715         }
 716         default:
 717                 ret += bprintfrr(buf, "(af %d)", sockunion_family(su));
 718         }
 719
 720         return ret;
 721 }
 722
 723 int sockunion_is_null(const union sockunion *su)
 724 {
 725         unsigned char null_s6_addr[16] = {0};
 726
 727         switch (sockunion_family(su)) {
 728         case AF_UNSPEC:
 729                 return 1;
 730         case AF_INET:
 731                 return (su->sin.sin_addr.s_addr == 0);
 732         case AF_INET6:
 733                 return !memcmp(su->sin6.sin6_addr.s6_addr, null_s6_addr,
 734                                sizeof(null_s6_addr));
 735         default:
 736                 return 0;
 737         }
 738 }
 739
 740 printfrr_ext_autoreg_i("PF", printfrr_pf);
 741 static ssize_t printfrr_pf(struct fbuf *buf, struct printfrr_eargs *ea,
 742                            uintmax_t val)
 743 {
 744         switch (val) {
 745         case AF_INET:
 746                 return bputs(buf, "AF_INET");
 747         case AF_INET6:
 748                 return bputs(buf, "AF_INET6");
 749         case AF_UNIX:
 750                 return bputs(buf, "AF_UNIX");
 751 #ifdef AF_PACKET
 752         case AF_PACKET:
 753                 return bputs(buf, "AF_PACKET");
 754 #endif
 755 #ifdef AF_NETLINK
 756         case AF_NETLINK:
 757                 return bputs(buf, "AF_NETLINK");
 758 #endif
 759         }
 760         return bprintfrr(buf, "AF_(%ju)", val);
 761 }
 762
 763 printfrr_ext_autoreg_i("SO", printfrr_so);
 764 static ssize_t printfrr_so(struct fbuf *buf, struct printfrr_eargs *ea,
 765                            uintmax_t val)
 766 {
 767         switch (val) {
 768         case SOCK_STREAM:
 769                 return bputs(buf, "SOCK_STREAM");
 770         case SOCK_DGRAM:
 771                 return bputs(buf, "SOCK_DGRAM");
 772         case SOCK_SEQPACKET:
 773                 return bputs(buf, "SOCK_SEQPACKET");
 774 #ifdef SOCK_RAW
 775         case SOCK_RAW:
 776                 return bputs(buf, "SOCK_RAW");
 777 #endif
 778 #ifdef SOCK_PACKET
 779         case SOCK_PACKET:
 780                 return bputs(buf, "SOCK_PACKET");
 781 #endif
 782         }
 783         return bprintfrr(buf, "SOCK_(%ju)", val);
 784 }