| 718e3744 |
1 | /* Zebra's client library. |
| 2 | * Copyright (C) 1999 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 |
| 7 | * it under the terms of the GNU General Public License as published |
| 8 | * by the Free Software Foundation; either version 2, or (at your |
| 9 | * option) any 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 |
| 18 | * Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, |
| 19 | * MA 02111-1307, USA. |
| 20 | */ |
| 21 | |
| 22 | #include <zebra.h> |
| 23 | |
| 24 | #include "prefix.h" |
| 25 | #include "stream.h" |
| 26 | #include "network.h" |
| 27 | #include "if.h" |
| 28 | #include "log.h" |
| 29 | #include "thread.h" |
| 30 | #include "zclient.h" |
| 31 | #include "memory.h" |
| 32 | #include "table.h" |
| 33 | |
| 34 | #include "zebra/rib.h" |
| 35 | #include "zebra/zserv.h" |
| 36 | \f |
| 37 | /* Zebra client events. */ |
| 38 | enum event {ZCLIENT_SCHEDULE, ZCLIENT_READ, ZCLIENT_CONNECT}; |
| 39 | |
| 40 | /* Prototype for event manager. */ |
| 41 | static void zclient_event (enum event, struct zclient *); |
| 42 | |
| 43 | /* This file local debug flag. */ |
| 44 | int zclient_debug = 0; |
| 45 | \f |
| 46 | /* Allocate zclient structure. */ |
| 47 | struct zclient * |
| 48 | zclient_new () |
| 49 | { |
| 50 | struct zclient *zclient; |
| 51 | zclient = XMALLOC (MTYPE_ZCLIENT, sizeof (struct zclient)); |
| 52 | memset (zclient, 0, sizeof (struct zclient)); |
| 53 | |
| 54 | zclient->ibuf = stream_new (ZEBRA_MAX_PACKET_SIZ); |
| 55 | zclient->obuf = stream_new (ZEBRA_MAX_PACKET_SIZ); |
| 56 | |
| 57 | return zclient; |
| 58 | } |
| 59 | |
| 60 | /* Free zclient structure. */ |
| 61 | void |
| 62 | zclient_free (struct zclient *zclient) |
| 63 | { |
| 64 | XFREE (MTYPE_ZCLIENT, zclient); |
| 65 | } |
| 66 | |
| 67 | /* Initialize zebra client. Argument redist_default is unwanted |
| 68 | redistribute route type. */ |
| 69 | void |
| 70 | zclient_init (struct zclient *zclient, int redist_default) |
| 71 | { |
| 72 | int i; |
| 73 | |
| 74 | /* Enable zebra client connection by default. */ |
| 75 | zclient->enable = 1; |
| 76 | |
| 77 | /* Set -1 to the default socket value. */ |
| 78 | zclient->sock = -1; |
| 79 | |
| 80 | /* Clear redistribution flags. */ |
| 81 | for (i = 0; i < ZEBRA_ROUTE_MAX; i++) |
| 82 | zclient->redist[i] = 0; |
| 83 | |
| 84 | /* Set unwanted redistribute route. bgpd does not need BGP route |
| 85 | redistribution. */ |
| 86 | zclient->redist_default = redist_default; |
| 87 | zclient->redist[redist_default] = 1; |
| 88 | |
| 89 | /* Set default-information redistribute to zero. */ |
| 90 | zclient->default_information = 0; |
| 91 | |
| 92 | /* Schedule first zclient connection. */ |
| 93 | if (zclient_debug) |
| 94 | zlog_info ("zclient start scheduled"); |
| 95 | |
| 96 | zclient_event (ZCLIENT_SCHEDULE, zclient); |
| 97 | } |
| 98 | |
| 99 | /* Stop zebra client services. */ |
| 100 | void |
| 101 | zclient_stop (struct zclient *zclient) |
| 102 | { |
| 103 | if (zclient_debug) |
| 104 | zlog_info ("zclient stopped"); |
| 105 | |
| 106 | /* Stop threads. */ |
| 107 | if (zclient->t_read) |
| 108 | { |
| 109 | thread_cancel (zclient->t_read); |
| 110 | zclient->t_read = NULL; |
| 111 | } |
| 112 | if (zclient->t_connect) |
| 113 | { |
| 114 | thread_cancel (zclient->t_connect); |
| 115 | zclient->t_connect = NULL; |
| 116 | } |
| 117 | |
| 118 | /* Close socket. */ |
| 119 | if (zclient->sock >= 0) |
| 120 | { |
| 121 | close (zclient->sock); |
| 122 | zclient->sock = -1; |
| 123 | } |
| 124 | zclient->fail = 0; |
| 125 | } |
| 126 | |
| 127 | void |
| 128 | zclient_reset (struct zclient *zclient) |
| 129 | { |
| 130 | zclient_stop (zclient); |
| 131 | zclient_init (zclient, zclient->redist_default); |
| 132 | } |
| 133 | |
| 134 | /* Make socket to zebra daemon. Return zebra socket. */ |
| 135 | int |
| 136 | zclient_socket () |
| 137 | { |
| 138 | int sock; |
| 139 | int ret; |
| 140 | struct sockaddr_in serv; |
| 141 | |
| 142 | /* We should think about IPv6 connection. */ |
| 143 | sock = socket (AF_INET, SOCK_STREAM, 0); |
| 144 | if (sock < 0) |
| 145 | return -1; |
| 146 | |
| 147 | /* Make server socket. */ |
| 148 | memset (&serv, 0, sizeof (struct sockaddr_in)); |
| 149 | serv.sin_family = AF_INET; |
| 150 | serv.sin_port = htons (ZEBRA_PORT); |
| 151 | #ifdef HAVE_SIN_LEN |
| 152 | serv.sin_len = sizeof (struct sockaddr_in); |
| 153 | #endif /* HAVE_SIN_LEN */ |
| 154 | serv.sin_addr.s_addr = htonl (INADDR_LOOPBACK); |
| 155 | |
| 156 | /* Connect to zebra. */ |
| 157 | ret = connect (sock, (struct sockaddr *) &serv, sizeof (serv)); |
| 158 | if (ret < 0) |
| 159 | { |
| 160 | close (sock); |
| 161 | return -1; |
| 162 | } |
| 163 | return sock; |
| 164 | } |
| 165 | |
| 166 | /* For sockaddr_un. */ |
| 167 | #include <sys/un.h> |
| 168 | |
| 169 | int |
| 170 | zclient_socket_un (char *path) |
| 171 | { |
| 172 | int ret; |
| 173 | int sock, len; |
| 174 | struct sockaddr_un addr; |
| 175 | |
| 176 | sock = socket (AF_UNIX, SOCK_STREAM, 0); |
| 177 | if (sock < 0) |
| 178 | return -1; |
| 179 | |
| 180 | /* Make server socket. */ |
| 181 | memset (&addr, 0, sizeof (struct sockaddr_un)); |
| 182 | addr.sun_family = AF_UNIX; |
| 183 | strncpy (addr.sun_path, path, strlen (path)); |
| 184 | #ifdef HAVE_SUN_LEN |
| 185 | len = addr.sun_len = SUN_LEN(&addr); |
| 186 | #else |
| 187 | len = sizeof (addr.sun_family) + strlen (addr.sun_path); |
| 188 | #endif /* HAVE_SUN_LEN */ |
| 189 | |
| 190 | ret = connect (sock, (struct sockaddr *) &addr, len); |
| 191 | if (ret < 0) |
| 192 | { |
| 193 | close (sock); |
| 194 | return -1; |
| 195 | } |
| 196 | return sock; |
| 197 | } |
| 198 | |
| 199 | /* Send simple Zebra message. */ |
| 200 | int |
| 201 | zebra_message_send (struct zclient *zclient, int command) |
| 202 | { |
| 203 | struct stream *s; |
| 204 | |
| 205 | /* Get zclient output buffer. */ |
| 206 | s = zclient->obuf; |
| 207 | stream_reset (s); |
| 208 | |
| 209 | /* Send very simple command only Zebra message. */ |
| 210 | stream_putw (s, 3); |
| 211 | stream_putc (s, command); |
| 212 | |
| 213 | return writen (zclient->sock, s->data, 3); |
| 214 | } |
| 215 | |
| 216 | /* Make connection to zebra daemon. */ |
| 217 | int |
| 218 | zclient_start (struct zclient *zclient) |
| 219 | { |
| 220 | int i; |
| 221 | |
| 222 | if (zclient_debug) |
| 223 | zlog_info ("zclient_start is called"); |
| 224 | |
| 225 | /* zclient is disabled. */ |
| 226 | if (! zclient->enable) |
| 227 | return 0; |
| 228 | |
| 229 | /* If already connected to the zebra. */ |
| 230 | if (zclient->sock >= 0) |
| 231 | return 0; |
| 232 | |
| 233 | /* Check connect thread. */ |
| 234 | if (zclient->t_connect) |
| 235 | return 0; |
| 236 | |
| 237 | /* Make socket. */ |
| 238 | #ifdef HAVE_TCP_ZEBRA |
| 239 | zclient->sock = zclient_socket (); |
| 240 | #else |
| 241 | zclient->sock = zclient_socket_un (ZEBRA_SERV_PATH); |
| 242 | #endif /* HAVE_TCP_ZEBRA */ |
| 243 | if (zclient->sock < 0) |
| 244 | { |
| 245 | if (zclient_debug) |
| 246 | zlog_info ("zclient connection fail"); |
| 247 | zclient->fail++; |
| 248 | zclient_event (ZCLIENT_CONNECT, zclient); |
| 249 | return -1; |
| 250 | } |
| 251 | |
| 252 | /* Clear fail count. */ |
| 253 | zclient->fail = 0; |
| 254 | if (zclient_debug) |
| 255 | zlog_info ("zclient connect success with socket [%d]", zclient->sock); |
| 256 | |
| 257 | /* Create read thread. */ |
| 258 | zclient_event (ZCLIENT_READ, zclient); |
| 259 | |
| 260 | /* We need interface information. */ |
| 261 | zebra_message_send (zclient, ZEBRA_INTERFACE_ADD); |
| 262 | |
| 263 | /* Flush all redistribute request. */ |
| 264 | for (i = 0; i < ZEBRA_ROUTE_MAX; i++) |
| 265 | if (i != zclient->redist_default && zclient->redist[i]) |
| 266 | zebra_redistribute_send (ZEBRA_REDISTRIBUTE_ADD, zclient->sock, i); |
| 267 | |
| 268 | /* If default information is needed. */ |
| 269 | if (zclient->default_information) |
| 270 | zebra_message_send (zclient, ZEBRA_REDISTRIBUTE_DEFAULT_ADD); |
| 271 | |
| 272 | return 0; |
| 273 | } |
| 274 | |
| 275 | /* This function is a wrapper function for calling zclient_start from |
| 276 | timer or event thread. */ |
| 277 | int |
| 278 | zclient_connect (struct thread *t) |
| 279 | { |
| 280 | struct zclient *zclient; |
| 281 | |
| 282 | zclient = THREAD_ARG (t); |
| 283 | zclient->t_connect = NULL; |
| 284 | |
| 285 | if (zclient_debug) |
| 286 | zlog_info ("zclient_connect is called"); |
| 287 | |
| 288 | return zclient_start (zclient); |
| 289 | } |
| 290 | \f |
| 291 | int |
| 292 | zapi_ipv4_add (struct zclient *zclient, struct prefix_ipv4 *p, |
| 293 | struct zapi_ipv4 *api) |
| 294 | { |
| 295 | int i; |
| 296 | int psize; |
| 297 | struct stream *s; |
| 298 | |
| 299 | /* Reset stream. */ |
| 300 | s = zclient->obuf; |
| 301 | stream_reset (s); |
| 302 | |
| 303 | /* Length place holder. */ |
| 304 | stream_putw (s, 0); |
| 305 | |
| 306 | /* Put command, type and nexthop. */ |
| 307 | stream_putc (s, ZEBRA_IPV4_ROUTE_ADD); |
| 308 | stream_putc (s, api->type); |
| 309 | stream_putc (s, api->flags); |
| 310 | stream_putc (s, api->message); |
| 311 | |
| 312 | /* Put prefix information. */ |
| 313 | psize = PSIZE (p->prefixlen); |
| 314 | stream_putc (s, p->prefixlen); |
| 315 | stream_write (s, (u_char *)&p->prefix, psize); |
| 316 | |
| 317 | /* Nexthop, ifindex, distance and metric information. */ |
| 318 | if (CHECK_FLAG (api->message, ZAPI_MESSAGE_NEXTHOP)) |
| 319 | { |
| 320 | if (CHECK_FLAG (api->flags, ZEBRA_FLAG_BLACKHOLE)) |
| 321 | { |
| 322 | stream_putc (s, 1); |
| 323 | stream_putc (s, ZEBRA_NEXTHOP_BLACKHOLE); |
| 324 | } |
| 325 | else |
| 326 | stream_putc (s, api->nexthop_num + api->ifindex_num); |
| 327 | |
| 328 | for (i = 0; i < api->nexthop_num; i++) |
| 329 | { |
| 330 | stream_putc (s, ZEBRA_NEXTHOP_IPV4); |
| 331 | stream_put_in_addr (s, api->nexthop[i]); |
| 332 | } |
| 333 | for (i = 0; i < api->ifindex_num; i++) |
| 334 | { |
| 335 | stream_putc (s, ZEBRA_NEXTHOP_IFINDEX); |
| 336 | stream_putl (s, api->ifindex[i]); |
| 337 | } |
| 338 | } |
| 339 | |
| 340 | if (CHECK_FLAG (api->message, ZAPI_MESSAGE_DISTANCE)) |
| 341 | stream_putc (s, api->distance); |
| 342 | if (CHECK_FLAG (api->message, ZAPI_MESSAGE_METRIC)) |
| 343 | stream_putl (s, api->metric); |
| 344 | |
| 345 | /* Put length at the first point of the stream. */ |
| 346 | stream_putw_at (s, 0, stream_get_endp (s)); |
| 347 | |
| 348 | return writen (zclient->sock, s->data, stream_get_endp (s)); |
| 349 | } |
| 350 | |
| 351 | int |
| 352 | zapi_ipv4_delete (struct zclient *zclient, struct prefix_ipv4 *p, |
| 353 | struct zapi_ipv4 *api) |
| 354 | { |
| 355 | int i; |
| 356 | int psize; |
| 357 | struct stream *s; |
| 358 | |
| 359 | /* Reset stream. */ |
| 360 | s = zclient->obuf; |
| 361 | stream_reset (s); |
| 362 | |
| 363 | /* Length place holder. */ |
| 364 | stream_putw (s, 0); |
| 365 | |
| 366 | /* Put command, type and nexthop. */ |
| 367 | stream_putc (s, ZEBRA_IPV4_ROUTE_DELETE); |
| 368 | stream_putc (s, api->type); |
| 369 | stream_putc (s, api->flags); |
| 370 | stream_putc (s, api->message); |
| 371 | |
| 372 | /* Put prefix information. */ |
| 373 | psize = PSIZE (p->prefixlen); |
| 374 | stream_putc (s, p->prefixlen); |
| 375 | stream_write (s, (u_char *)&p->prefix, psize); |
| 376 | |
| 377 | /* Nexthop, ifindex, distance and metric information. */ |
| 378 | if (CHECK_FLAG (api->message, ZAPI_MESSAGE_NEXTHOP)) |
| 379 | { |
| 380 | if (CHECK_FLAG (api->flags, ZEBRA_FLAG_BLACKHOLE)) |
| 381 | { |
| 382 | stream_putc (s, 1); |
| 383 | stream_putc (s, ZEBRA_NEXTHOP_BLACKHOLE); |
| 384 | } |
| 385 | else |
| 386 | stream_putc (s, api->nexthop_num + api->ifindex_num); |
| 387 | |
| 388 | for (i = 0; i < api->nexthop_num; i++) |
| 389 | { |
| 390 | stream_putc (s, ZEBRA_NEXTHOP_IPV4); |
| 391 | stream_put_in_addr (s, api->nexthop[i]); |
| 392 | } |
| 393 | for (i = 0; i < api->ifindex_num; i++) |
| 394 | { |
| 395 | stream_putc (s, ZEBRA_NEXTHOP_IFINDEX); |
| 396 | stream_putl (s, api->ifindex[i]); |
| 397 | } |
| 398 | } |
| 399 | |
| 400 | if (CHECK_FLAG (api->message, ZAPI_MESSAGE_DISTANCE)) |
| 401 | stream_putc (s, api->distance); |
| 402 | if (CHECK_FLAG (api->message, ZAPI_MESSAGE_METRIC)) |
| 403 | stream_putl (s, api->metric); |
| 404 | |
| 405 | /* Put length at the first point of the stream. */ |
| 406 | stream_putw_at (s, 0, stream_get_endp (s)); |
| 407 | |
| 408 | return writen (zclient->sock, s->data, stream_get_endp (s)); |
| 409 | } |
| 410 | |
| 411 | #ifdef HAVE_IPV6 |
| 412 | int |
| 413 | zapi_ipv6_add (struct zclient *zclient, struct prefix_ipv6 *p, |
| 414 | struct zapi_ipv6 *api) |
| 415 | { |
| 416 | int i; |
| 417 | int psize; |
| 418 | struct stream *s; |
| 419 | |
| 420 | /* Reset stream. */ |
| 421 | s = zclient->obuf; |
| 422 | stream_reset (s); |
| 423 | |
| 424 | /* Length place holder. */ |
| 425 | stream_putw (s, 0); |
| 426 | |
| 427 | /* Put command, type and nexthop. */ |
| 428 | stream_putc (s, ZEBRA_IPV6_ROUTE_ADD); |
| 429 | stream_putc (s, api->type); |
| 430 | stream_putc (s, api->flags); |
| 431 | stream_putc (s, api->message); |
| 432 | |
| 433 | /* Put prefix information. */ |
| 434 | psize = PSIZE (p->prefixlen); |
| 435 | stream_putc (s, p->prefixlen); |
| 436 | stream_write (s, (u_char *)&p->prefix, psize); |
| 437 | |
| 438 | /* Nexthop, ifindex, distance and metric information. */ |
| 439 | if (CHECK_FLAG (api->message, ZAPI_MESSAGE_NEXTHOP)) |
| 440 | { |
| 441 | stream_putc (s, api->nexthop_num + api->ifindex_num); |
| 442 | |
| 443 | for (i = 0; i < api->nexthop_num; i++) |
| 444 | { |
| 445 | stream_putc (s, ZEBRA_NEXTHOP_IPV6); |
| 446 | stream_write (s, (u_char *)api->nexthop[i], 16); |
| 447 | } |
| 448 | for (i = 0; i < api->ifindex_num; i++) |
| 449 | { |
| 450 | stream_putc (s, ZEBRA_NEXTHOP_IFINDEX); |
| 451 | stream_putl (s, api->ifindex[i]); |
| 452 | } |
| 453 | } |
| 454 | |
| 455 | if (CHECK_FLAG (api->message, ZAPI_MESSAGE_DISTANCE)) |
| 456 | stream_putc (s, api->distance); |
| 457 | if (CHECK_FLAG (api->message, ZAPI_MESSAGE_METRIC)) |
| 458 | stream_putl (s, api->metric); |
| 459 | |
| 460 | /* Put length at the first point of the stream. */ |
| 461 | stream_putw_at (s, 0, stream_get_endp (s)); |
| 462 | |
| 463 | return writen (zclient->sock, s->data, stream_get_endp (s)); |
| 464 | } |
| 465 | |
| 466 | int |
| 467 | zapi_ipv6_delete (struct zclient *zclient, struct prefix_ipv6 *p, |
| 468 | struct zapi_ipv6 *api) |
| 469 | { |
| 470 | int i; |
| 471 | int psize; |
| 472 | struct stream *s; |
| 473 | |
| 474 | /* Reset stream. */ |
| 475 | s = zclient->obuf; |
| 476 | stream_reset (s); |
| 477 | |
| 478 | /* Length place holder. */ |
| 479 | stream_putw (s, 0); |
| 480 | |
| 481 | /* Put command, type and nexthop. */ |
| 482 | stream_putc (s, ZEBRA_IPV6_ROUTE_DELETE); |
| 483 | stream_putc (s, api->type); |
| 484 | stream_putc (s, api->flags); |
| 485 | stream_putc (s, api->message); |
| 486 | |
| 487 | /* Put prefix information. */ |
| 488 | psize = PSIZE (p->prefixlen); |
| 489 | stream_putc (s, p->prefixlen); |
| 490 | stream_write (s, (u_char *)&p->prefix, psize); |
| 491 | |
| 492 | /* Nexthop, ifindex, distance and metric information. */ |
| 493 | if (CHECK_FLAG (api->message, ZAPI_MESSAGE_NEXTHOP)) |
| 494 | { |
| 495 | stream_putc (s, api->nexthop_num + api->ifindex_num); |
| 496 | |
| 497 | for (i = 0; i < api->nexthop_num; i++) |
| 498 | { |
| 499 | stream_putc (s, ZEBRA_NEXTHOP_IPV6); |
| 500 | stream_write (s, (u_char *)api->nexthop[i], 16); |
| 501 | } |
| 502 | for (i = 0; i < api->ifindex_num; i++) |
| 503 | { |
| 504 | stream_putc (s, ZEBRA_NEXTHOP_IFINDEX); |
| 505 | stream_putl (s, api->ifindex[i]); |
| 506 | } |
| 507 | } |
| 508 | |
| 509 | if (CHECK_FLAG (api->message, ZAPI_MESSAGE_DISTANCE)) |
| 510 | stream_putc (s, api->distance); |
| 511 | if (CHECK_FLAG (api->message, ZAPI_MESSAGE_METRIC)) |
| 512 | stream_putl (s, api->metric); |
| 513 | |
| 514 | /* Put length at the first point of the stream. */ |
| 515 | stream_putw_at (s, 0, stream_get_endp (s)); |
| 516 | |
| 517 | return writen (zclient->sock, s->data, stream_get_endp (s)); |
| 518 | } |
| 519 | |
| 520 | #endif /* HAVE_IPV6 */ |
| 521 | |
| 522 | int |
| 523 | zebra_redistribute_send (int command, int sock, int type) |
| 524 | { |
| 525 | int ret; |
| 526 | struct stream *s; |
| 527 | |
| 528 | s = stream_new (ZEBRA_MAX_PACKET_SIZ); |
| 529 | |
| 530 | /* Total length of the messages. */ |
| 531 | stream_putw (s, 4); |
| 532 | |
| 533 | stream_putc (s, command); |
| 534 | stream_putc (s, type); |
| 535 | |
| 536 | ret = writen (sock, s->data, 4); |
| 537 | |
| 538 | stream_free (s); |
| 539 | |
| 540 | return ret; |
| 541 | } |
| 542 | |
| 543 | /* Interface addition from zebra daemon. */ |
| 544 | struct interface * |
| 545 | zebra_interface_add_read (struct stream *s) |
| 546 | { |
| 547 | struct interface *ifp; |
| 548 | u_char ifname_tmp[INTERFACE_NAMSIZ]; |
| 549 | |
| 550 | /* Read interface name. */ |
| 551 | stream_get (ifname_tmp, s, INTERFACE_NAMSIZ); |
| 552 | |
| 553 | /* Lookup this by interface name. */ |
| 554 | ifp = if_lookup_by_name (ifname_tmp); |
| 555 | |
| 556 | /* If such interface does not exist, make new one. */ |
| 557 | if (! ifp) |
| 558 | { |
| 559 | ifp = if_create (); |
| 560 | strncpy (ifp->name, ifname_tmp, IFNAMSIZ); |
| 561 | } |
| 562 | |
| 563 | /* Read interface's index. */ |
| 564 | ifp->ifindex = stream_getl (s); |
| 565 | |
| 566 | /* Read interface's value. */ |
| 567 | ifp->flags = stream_getl (s); |
| 568 | ifp->metric = stream_getl (s); |
| 569 | ifp->mtu = stream_getl (s); |
| 570 | ifp->bandwidth = stream_getl (s); |
| 571 | #ifdef HAVE_SOCKADDR_DL |
| 572 | stream_get (&ifp->sdl, s, sizeof (ifp->sdl)); |
| 573 | #else |
| 574 | ifp->hw_addr_len = stream_getl (s); |
| 575 | if (ifp->hw_addr_len) |
| 576 | stream_get (ifp->hw_addr, s, ifp->hw_addr_len); |
| 577 | #endif /* HAVE_SOCKADDR_DL */ |
| 578 | |
| 579 | return ifp; |
| 580 | } |
| 581 | |
| 582 | /* Read interface up/down msg from zebra daemon. */ |
| 583 | struct interface * |
| 584 | zebra_interface_state_read (struct stream *s) |
| 585 | { |
| 586 | struct interface *ifp; |
| 587 | u_char ifname_tmp[INTERFACE_NAMSIZ]; |
| 588 | |
| 589 | /* Read interface name. */ |
| 590 | stream_get (ifname_tmp, s, INTERFACE_NAMSIZ); |
| 591 | |
| 592 | /* Lookup this by interface index. */ |
| 593 | ifp = if_lookup_by_name (ifname_tmp); |
| 594 | |
| 595 | /* If such interface does not exist, indicate an error */ |
| 596 | if (! ifp) |
| 597 | return NULL; |
| 598 | |
| 599 | /* Read interface's index. */ |
| 600 | ifp->ifindex = stream_getl (s); |
| 601 | |
| 602 | /* Read interface's value. */ |
| 603 | ifp->flags = stream_getl (s); |
| 604 | ifp->metric = stream_getl (s); |
| 605 | ifp->mtu = stream_getl (s); |
| 606 | ifp->bandwidth = stream_getl (s); |
| 607 | |
| 608 | return ifp; |
| 609 | } |
| 610 | |
| 611 | struct connected * |
| 612 | zebra_interface_address_add_read (struct stream *s) |
| 613 | { |
| 614 | unsigned int ifindex; |
| 615 | struct interface *ifp; |
| 616 | struct connected *ifc; |
| 617 | struct prefix *p; |
| 618 | int family; |
| 619 | int plen; |
| 620 | |
| 621 | /* Get interface index. */ |
| 622 | ifindex = stream_getl (s); |
| 623 | |
| 624 | /* Lookup index. */ |
| 625 | ifp = if_lookup_by_index (ifindex); |
| 626 | if (ifp == NULL) |
| 627 | { |
| 628 | zlog_warn ("zebra_interface_address_add_read: Can't find interface by ifindex: %d ", ifindex); |
| 629 | return NULL; |
| 630 | } |
| 631 | |
| 632 | /* Allocate new connected address. */ |
| 633 | ifc = connected_new (); |
| 634 | ifc->ifp = ifp; |
| 635 | |
| 636 | /* Fetch flag. */ |
| 637 | ifc->flags = stream_getc (s); |
| 638 | |
| 639 | /* Fetch interface address. */ |
| 640 | p = prefix_new (); |
| 641 | family = p->family = stream_getc (s); |
| 642 | |
| 643 | plen = prefix_blen (p); |
| 644 | stream_get (&p->u.prefix, s, plen); |
| 645 | p->prefixlen = stream_getc (s); |
| 646 | ifc->address = p; |
| 647 | |
| 648 | /* Fetch destination address. */ |
| 649 | p = prefix_new (); |
| 650 | stream_get (&p->u.prefix, s, plen); |
| 651 | p->family = family; |
| 652 | |
| 653 | ifc->destination = p; |
| 654 | |
| 655 | p = ifc->address; |
| 656 | |
| 657 | /* Add connected address to the interface. */ |
| 658 | listnode_add (ifp->connected, ifc); |
| 659 | |
| 660 | return ifc; |
| 661 | } |
| 662 | |
| 663 | struct connected * |
| 664 | zebra_interface_address_delete_read (struct stream *s) |
| 665 | { |
| 666 | unsigned int ifindex; |
| 667 | struct interface *ifp; |
| 668 | struct connected *ifc; |
| 669 | struct prefix p; |
| 670 | struct prefix d; |
| 671 | int family; |
| 672 | int len; |
| 673 | u_char flags; |
| 674 | |
| 675 | /* Get interface index. */ |
| 676 | ifindex = stream_getl (s); |
| 677 | |
| 678 | /* Lookup index. */ |
| 679 | ifp = if_lookup_by_index (ifindex); |
| 680 | if (ifp == NULL) |
| 681 | { |
| 682 | zlog_warn ("zebra_interface_address_delete_read: Can't find interface by ifindex: %d ", ifindex); |
| 683 | return NULL; |
| 684 | } |
| 685 | |
| 686 | /* Fetch flag. */ |
| 687 | flags = stream_getc (s); |
| 688 | |
| 689 | /* Fetch interface address. */ |
| 690 | family = p.family = stream_getc (s); |
| 691 | |
| 692 | len = prefix_blen (&p); |
| 693 | stream_get (&p.u.prefix, s, len); |
| 694 | p.prefixlen = stream_getc (s); |
| 695 | |
| 696 | /* Fetch destination address. */ |
| 697 | stream_get (&d.u.prefix, s, len); |
| 698 | d.family = family; |
| 699 | |
| 700 | ifc = connected_delete_by_prefix (ifp, &p); |
| 701 | |
| 702 | return ifc; |
| 703 | } |
| 704 | \f |
| 705 | /* Zebra client message read function. */ |
| 706 | int |
| 707 | zclient_read (struct thread *thread) |
| 708 | { |
| 709 | int ret; |
| 710 | int nbytes; |
| 711 | int sock; |
| 712 | zebra_size_t length; |
| 713 | zebra_command_t command; |
| 714 | struct zclient *zclient; |
| 715 | |
| 716 | /* Get socket to zebra. */ |
| 717 | sock = THREAD_FD (thread); |
| 718 | zclient = THREAD_ARG (thread); |
| 719 | zclient->t_read = NULL; |
| 720 | |
| 721 | /* Clear input buffer. */ |
| 722 | stream_reset (zclient->ibuf); |
| 723 | |
| 724 | /* Read zebra header. */ |
| 725 | nbytes = stream_read (zclient->ibuf, sock, ZEBRA_HEADER_SIZE); |
| 726 | |
| 727 | /* zebra socket is closed. */ |
| 728 | if (nbytes == 0) |
| 729 | { |
| 730 | if (zclient_debug) |
| 731 | zlog_info ("zclient connection closed socket [%d].", sock); |
| 732 | zclient->fail++; |
| 733 | zclient_stop (zclient); |
| 734 | zclient_event (ZCLIENT_CONNECT, zclient); |
| 735 | return -1; |
| 736 | } |
| 737 | |
| 738 | /* zebra read error. */ |
| 739 | if (nbytes < 0 || nbytes != ZEBRA_HEADER_SIZE) |
| 740 | { |
| 741 | if (zclient_debug) |
| 742 | zlog_info ("Can't read all packet (length %d).", nbytes); |
| 743 | zclient->fail++; |
| 744 | zclient_stop (zclient); |
| 745 | zclient_event (ZCLIENT_CONNECT, zclient); |
| 746 | return -1; |
| 747 | } |
| 748 | |
| 749 | /* Fetch length and command. */ |
| 750 | length = stream_getw (zclient->ibuf); |
| 751 | command = stream_getc (zclient->ibuf); |
| 752 | |
| 753 | /* Length check. */ |
| 754 | if (length >= zclient->ibuf->size) |
| 755 | { |
| 756 | stream_free (zclient->ibuf); |
| 757 | zclient->ibuf = stream_new (length + 1); |
| 758 | } |
| 759 | length -= ZEBRA_HEADER_SIZE; |
| 760 | |
| 761 | /* Read rest of zebra packet. */ |
| 762 | nbytes = stream_read (zclient->ibuf, sock, length); |
| 763 | if (nbytes != length) |
| 764 | { |
| 765 | if (zclient_debug) |
| 766 | zlog_info ("zclient connection closed socket [%d].", sock); |
| 767 | zclient->fail++; |
| 768 | zclient_stop (zclient); |
| 769 | zclient_event (ZCLIENT_CONNECT, zclient); |
| 770 | return -1; |
| 771 | } |
| 772 | |
| 773 | switch (command) |
| 774 | { |
| 775 | case ZEBRA_INTERFACE_ADD: |
| 776 | if (zclient->interface_add) |
| 777 | ret = (*zclient->interface_add) (command, zclient, length); |
| 778 | break; |
| 779 | case ZEBRA_INTERFACE_DELETE: |
| 780 | if (zclient->interface_delete) |
| 781 | ret = (*zclient->interface_delete) (command, zclient, length); |
| 782 | break; |
| 783 | case ZEBRA_INTERFACE_ADDRESS_ADD: |
| 784 | if (zclient->interface_address_add) |
| 785 | ret = (*zclient->interface_address_add) (command, zclient, length); |
| 786 | break; |
| 787 | case ZEBRA_INTERFACE_ADDRESS_DELETE: |
| 788 | if (zclient->interface_address_delete) |
| 789 | ret = (*zclient->interface_address_delete) (command, zclient, length); |
| 790 | break; |
| 791 | case ZEBRA_INTERFACE_UP: |
| 792 | if (zclient->interface_up) |
| 793 | ret = (*zclient->interface_up) (command, zclient, length); |
| 794 | break; |
| 795 | case ZEBRA_INTERFACE_DOWN: |
| 796 | if (zclient->interface_down) |
| 797 | ret = (*zclient->interface_down) (command, zclient, length); |
| 798 | break; |
| 799 | case ZEBRA_IPV4_ROUTE_ADD: |
| 800 | if (zclient->ipv4_route_add) |
| 801 | ret = (*zclient->ipv4_route_add) (command, zclient, length); |
| 802 | break; |
| 803 | case ZEBRA_IPV4_ROUTE_DELETE: |
| 804 | if (zclient->ipv4_route_delete) |
| 805 | ret = (*zclient->ipv4_route_delete) (command, zclient, length); |
| 806 | break; |
| 807 | case ZEBRA_IPV6_ROUTE_ADD: |
| 808 | if (zclient->ipv6_route_add) |
| 809 | ret = (*zclient->ipv6_route_add) (command, zclient, length); |
| 810 | break; |
| 811 | case ZEBRA_IPV6_ROUTE_DELETE: |
| 812 | if (zclient->ipv6_route_delete) |
| 813 | ret = (*zclient->ipv6_route_delete) (command, zclient, length); |
| 814 | break; |
| 815 | default: |
| 816 | break; |
| 817 | } |
| 818 | |
| 819 | /* Register read thread. */ |
| 820 | zclient_event (ZCLIENT_READ, zclient); |
| 821 | |
| 822 | return 0; |
| 823 | } |
| 824 | |
| 825 | void |
| 826 | zclient_redistribute_set (struct zclient *zclient, int type) |
| 827 | { |
| 828 | if (zclient->redist[type]) |
| 829 | return; |
| 830 | |
| 831 | zclient->redist[type] = 1; |
| 832 | |
| 833 | if (zclient->sock > 0) |
| 834 | zebra_redistribute_send (ZEBRA_REDISTRIBUTE_ADD, zclient->sock, type); |
| 835 | } |
| 836 | |
| 837 | void |
| 838 | zclient_redistribute_unset (struct zclient *zclient, int type) |
| 839 | { |
| 840 | if (! zclient->redist[type]) |
| 841 | return; |
| 842 | |
| 843 | zclient->redist[type] = 0; |
| 844 | |
| 845 | if (zclient->sock > 0) |
| 846 | zebra_redistribute_send (ZEBRA_REDISTRIBUTE_DELETE, zclient->sock, type); |
| 847 | } |
| 848 | |
| 849 | void |
| 850 | zclient_redistribute_default_set (struct zclient *zclient) |
| 851 | { |
| 852 | if (zclient->default_information) |
| 853 | return; |
| 854 | |
| 855 | zclient->default_information = 1; |
| 856 | |
| 857 | if (zclient->sock > 0) |
| 858 | zebra_message_send (zclient, ZEBRA_REDISTRIBUTE_DEFAULT_ADD); |
| 859 | } |
| 860 | |
| 861 | void |
| 862 | zclient_redistribute_default_unset (struct zclient *zclient) |
| 863 | { |
| 864 | if (! zclient->default_information) |
| 865 | return; |
| 866 | |
| 867 | zclient->default_information = 0; |
| 868 | |
| 869 | if (zclient->sock > 0) |
| 870 | zebra_message_send (zclient, ZEBRA_REDISTRIBUTE_DEFAULT_DELETE); |
| 871 | } |
| 872 | \f |
| 873 | extern struct thread_master *master; |
| 874 | |
| 875 | static void |
| 876 | zclient_event (enum event event, struct zclient *zclient) |
| 877 | { |
| 878 | switch (event) |
| 879 | { |
| 880 | case ZCLIENT_SCHEDULE: |
| 881 | if (! zclient->t_connect) |
| 882 | zclient->t_connect = |
| 883 | thread_add_event (master, zclient_connect, zclient, 0); |
| 884 | break; |
| 885 | case ZCLIENT_CONNECT: |
| 886 | if (zclient->fail >= 10) |
| 887 | return; |
| 888 | if (zclient_debug) |
| 889 | zlog_info ("zclient connect schedule interval is %d", |
| 890 | zclient->fail < 3 ? 10 : 60); |
| 891 | if (! zclient->t_connect) |
| 892 | zclient->t_connect = |
| 893 | thread_add_timer (master, zclient_connect, zclient, |
| 894 | zclient->fail < 3 ? 10 : 60); |
| 895 | break; |
| 896 | case ZCLIENT_READ: |
| 897 | zclient->t_read = |
| 898 | thread_add_read (master, zclient_read, zclient, zclient->sock); |
| 899 | break; |
| 900 | } |
| 901 | } |
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