1 /*- 2 * Copyright 2001 Wasabi Systems, Inc. 3 * All rights reserved. 4 * 5 * Written by Jason R. Thorpe for Wasabi Systems, Inc. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed for the NetBSD Project by 18 * Wasabi Systems, Inc. 19 * 4. The name of Wasabi Systems, Inc. may not be used to endorse 20 * or promote products derived from this software without specific prior 21 * written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 25 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 26 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC 27 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 30 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 31 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 32 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 33 * POSSIBILITY OF SUCH DAMAGE. 34 * 35 * $FreeBSD: src/sbin/ifconfig/ifbridge.c,v 1.1.2.2 2005/12/28 04:12:58 thompsa Exp $ 36 */ 37 38 #include <sys/param.h> 39 #include <sys/ioctl.h> 40 #include <sys/socket.h> 41 #include <sys/sockio.h> 42 43 #include <stdlib.h> 44 #include <unistd.h> 45 46 #include <net/ethernet.h> 47 #include <net/if.h> 48 #include <net/bridge/if_bridgevar.h> 49 #include <net/route.h> 50 51 #include <ctype.h> 52 #include <stdio.h> 53 #include <string.h> 54 #include <stdlib.h> 55 #include <unistd.h> 56 #include <err.h> 57 #include <errno.h> 58 59 #include "ifconfig.h" 60 61 static int 62 get_val(const char *cp, u_long *valp) 63 { 64 char *endptr; 65 u_long val; 66 67 errno = 0; 68 val = strtoul(cp, &endptr, 0); 69 if (cp[0] == '\0' || endptr[0] != '\0' || errno == ERANGE) 70 return (-1); 71 72 *valp = val; 73 return (0); 74 } 75 76 static int 77 do_cmd(int sock, u_long op, void *arg, size_t argsize, int set) 78 { 79 struct ifdrv ifd; 80 81 memset(&ifd, 0, sizeof(ifd)); 82 83 strlcpy(ifd.ifd_name, ifr.ifr_name, sizeof(ifd.ifd_name)); 84 ifd.ifd_cmd = op; 85 ifd.ifd_len = argsize; 86 ifd.ifd_data = arg; 87 88 return (ioctl(sock, set ? SIOCSDRVSPEC : SIOCGDRVSPEC, &ifd)); 89 } 90 91 static void 92 do_bridgeflag(int sock, const char *ifs, int flag, int set) 93 { 94 struct ifbreq req; 95 96 strlcpy(req.ifbr_ifsname, ifs, sizeof(req.ifbr_ifsname)); 97 98 if (do_cmd(sock, BRDGGIFFLGS, &req, sizeof(req), 0) < 0) 99 err(1, "unable to get bridge flags"); 100 101 if (set) 102 req.ifbr_ifsflags |= flag; 103 else 104 req.ifbr_ifsflags &= ~flag; 105 106 if (do_cmd(sock, BRDGSIFFLGS, &req, sizeof(req), 1) < 0) 107 err(1, "unable to set bridge flags"); 108 } 109 110 static void 111 bridge_interfaces(int s, const char *prefix) 112 { 113 static const char *stpstates[] = { 114 "disabled", 115 "listening", 116 "learning", 117 "forwarding", 118 "blocking", 119 }; 120 struct ifbifconf bifc; 121 struct ifbreq *req; 122 char *inbuf = NULL, *ninbuf; 123 char *p, *pad; 124 int i, len = 8192; 125 126 pad = strdup(prefix); 127 if (pad == NULL) 128 err(1, "strdup"); 129 /* replace the prefix with whitespace */ 130 for (p = pad; *p != '\0'; p++) { 131 if(isprint(*p)) 132 *p = ' '; 133 } 134 135 for (;;) { 136 ninbuf = realloc(inbuf, len); 137 if (ninbuf == NULL) 138 err(1, "unable to allocate interface buffer"); 139 bifc.ifbic_len = len; 140 bifc.ifbic_buf = inbuf = ninbuf; 141 if (do_cmd(s, BRDGGIFS, &bifc, sizeof(bifc), 0) < 0) 142 err(1, "unable to get interface list"); 143 if ((bifc.ifbic_len + sizeof(*req)) < len) 144 break; 145 len *= 2; 146 } 147 148 for (i = 0; i < bifc.ifbic_len / sizeof(*req); i++) { 149 req = bifc.ifbic_req + i; 150 printf("%s%s ", prefix, req->ifbr_ifsname); 151 printb("flags", req->ifbr_ifsflags, IFBIFBITS); 152 printf("\n"); 153 154 if (req->ifbr_ifsflags & IFBIF_STP) { 155 printf("%s", pad); 156 printf("port %u priority %u", 157 req->ifbr_portno, req->ifbr_priority); 158 printf(" path cost %u", req->ifbr_path_cost); 159 if (req->ifbr_state < 160 sizeof(stpstates) / sizeof(stpstates[0])) 161 printf(" %s", stpstates[req->ifbr_state]); 162 else 163 printf(" <unknown state %d>", 164 req->ifbr_state); 165 printf("\n"); 166 } 167 } 168 169 free(inbuf); 170 } 171 172 static void 173 bridge_addresses(int s, const char *prefix) 174 { 175 struct ifbaconf ifbac; 176 struct ifbareq *ifba; 177 char *inbuf = NULL, *ninbuf; 178 int i, len = 8192; 179 struct ether_addr ea; 180 181 for (;;) { 182 ninbuf = realloc(inbuf, len); 183 if (ninbuf == NULL) 184 err(1, "unable to allocate address buffer"); 185 ifbac.ifbac_len = len; 186 ifbac.ifbac_buf = inbuf = ninbuf; 187 if (do_cmd(s, BRDGRTS, &ifbac, sizeof(ifbac), 0) < 0) 188 err(1, "unable to get address cache"); 189 if ((ifbac.ifbac_len + sizeof(*ifba)) < len) 190 break; 191 len *= 2; 192 } 193 194 for (i = 0; i < ifbac.ifbac_len / sizeof(*ifba); i++) { 195 ifba = ifbac.ifbac_req + i; 196 memcpy(ea.octet, ifba->ifba_dst, 197 sizeof(ea.octet)); 198 printf("%s%s %s %lu ", prefix, ether_ntoa(&ea), 199 ifba->ifba_ifsname, ifba->ifba_expire); 200 printb("flags", ifba->ifba_flags, IFBAFBITS); 201 printf("\n"); 202 } 203 204 free(inbuf); 205 } 206 207 static void 208 bridge_status(int s) 209 { 210 struct ifbrparam param; 211 u_int16_t pri; 212 u_int8_t ht, fd, ma; 213 214 if (do_cmd(s, BRDGGPRI, ¶m, sizeof(param), 0) < 0) 215 return; 216 pri = param.ifbrp_prio; 217 218 if (do_cmd(s, BRDGGHT, ¶m, sizeof(param), 0) < 0) 219 return; 220 ht = param.ifbrp_hellotime; 221 222 if (do_cmd(s, BRDGGFD, ¶m, sizeof(param), 0) < 0) 223 return; 224 fd = param.ifbrp_fwddelay; 225 226 if (do_cmd(s, BRDGGMA, ¶m, sizeof(param), 0) < 0) 227 return; 228 ma = param.ifbrp_maxage; 229 230 printf("\tpriority %u hellotime %u fwddelay %u maxage %u\n", 231 pri, ht, fd, ma); 232 233 bridge_interfaces(s, "\tmember: "); 234 235 return; 236 237 } 238 239 static void 240 setbridge_add(const char *val, int d, int s, const struct afswtch *afp) 241 { 242 struct ifbreq req; 243 244 memset(&req, 0, sizeof(req)); 245 strlcpy(req.ifbr_ifsname, val, sizeof(req.ifbr_ifsname)); 246 if (do_cmd(s, BRDGADD, &req, sizeof(req), 1) < 0) 247 err(1, "BRDGADD %s", val); 248 } 249 250 static void 251 setbridge_delete(const char *val, int d, int s, const struct afswtch *afp) 252 { 253 struct ifbreq req; 254 255 memset(&req, 0, sizeof(req)); 256 strlcpy(req.ifbr_ifsname, val, sizeof(req.ifbr_ifsname)); 257 if (do_cmd(s, BRDGDEL, &req, sizeof(req), 1) < 0) 258 err(1, "BRDGDEL %s", val); 259 } 260 261 static void 262 setbridge_discover(const char *val, int d, int s, const struct afswtch *afp) 263 { 264 265 do_bridgeflag(s, val, IFBIF_DISCOVER, 1); 266 } 267 268 static void 269 unsetbridge_discover(const char *val, int d, int s, const struct afswtch *afp) 270 { 271 272 do_bridgeflag(s, val, IFBIF_DISCOVER, 0); 273 } 274 275 static void 276 setbridge_learn(const char *val, int d, int s, const struct afswtch *afp) 277 { 278 279 do_bridgeflag(s, val, IFBIF_LEARNING, 1); 280 } 281 282 static void 283 unsetbridge_learn(const char *val, int d, int s, const struct afswtch *afp) 284 { 285 286 do_bridgeflag(s, val, IFBIF_LEARNING, 0); 287 } 288 289 static void 290 setbridge_span(const char *val, int d, int s, const struct afswtch *afp) 291 { 292 struct ifbreq req; 293 294 memset(&req, 0, sizeof(req)); 295 strlcpy(req.ifbr_ifsname, val, sizeof(req.ifbr_ifsname)); 296 if (do_cmd(s, BRDGADDS, &req, sizeof(req), 1) < 0) 297 err(1, "BRDGADDS %s", val); 298 } 299 300 static void 301 unsetbridge_span(const char *val, int d, int s, const struct afswtch *afp) 302 { 303 struct ifbreq req; 304 305 memset(&req, 0, sizeof(req)); 306 strlcpy(req.ifbr_ifsname, val, sizeof(req.ifbr_ifsname)); 307 if (do_cmd(s, BRDGDELS, &req, sizeof(req), 1) < 0) 308 err(1, "BRDGDELS %s", val); 309 } 310 311 static void 312 setbridge_stp(const char *val, int d, int s, const struct afswtch *afp) 313 { 314 315 do_bridgeflag(s, val, IFBIF_STP, 1); 316 } 317 318 static void 319 unsetbridge_stp(const char *val, int d, int s, const struct afswtch *afp) 320 { 321 322 do_bridgeflag(s, val, IFBIF_STP, 0); 323 } 324 325 static void 326 setbridge_flush(const char *val, int d, int s, const struct afswtch *afp) 327 { 328 struct ifbreq req; 329 330 memset(&req, 0, sizeof(req)); 331 req.ifbr_ifsflags = IFBF_FLUSHDYN; 332 if (do_cmd(s, BRDGFLUSH, &req, sizeof(req), 1) < 0) 333 err(1, "BRDGFLUSH"); 334 } 335 336 static void 337 setbridge_flushall(const char *val, int d, int s, const struct afswtch *afp) 338 { 339 struct ifbreq req; 340 341 memset(&req, 0, sizeof(req)); 342 req.ifbr_ifsflags = IFBF_FLUSHALL; 343 if (do_cmd(s, BRDGFLUSH, &req, sizeof(req), 1) < 0) 344 err(1, "BRDGFLUSH"); 345 } 346 347 static void 348 setbridge_static(const char *val, const char *mac, int s, 349 const struct afswtch *afp) 350 { 351 struct ifbareq req; 352 struct ether_addr *ea; 353 354 memset(&req, 0, sizeof(req)); 355 strlcpy(req.ifba_ifsname, val, sizeof(req.ifba_ifsname)); 356 357 ea = ether_aton(mac); 358 if (ea == NULL) 359 errx(1, "%s: invalid address: %s", val, mac); 360 361 memcpy(req.ifba_dst, ea->octet, sizeof(req.ifba_dst)); 362 req.ifba_flags = IFBAF_STATIC; 363 364 if (do_cmd(s, BRDGSADDR, &req, sizeof(req), 1) < 0) 365 err(1, "BRDGSADDR %s", val); 366 } 367 368 static void 369 setbridge_deladdr(const char *val, int d, int s, const struct afswtch *afp) 370 { 371 struct ifbareq req; 372 struct ether_addr *ea; 373 374 memset(&req, 0, sizeof(req)); 375 376 ea = ether_aton(val); 377 if (ea == NULL) 378 errx(1, "invalid address: %s", val); 379 380 memcpy(req.ifba_dst, ea->octet, sizeof(req.ifba_dst)); 381 382 if (do_cmd(s, BRDGDADDR, &req, sizeof(req), 1) < 0) 383 err(1, "BRDGDADDR %s", val); 384 } 385 386 static void 387 getbridge_addr(const char *val, int d, int s, const struct afswtch *afp) 388 { 389 bridge_addresses(s, ""); 390 } 391 392 static void 393 setbridge_maxaddr(const char *arg, int d, int s, const struct afswtch *afp) 394 { 395 struct ifbrparam param; 396 u_long val; 397 398 if (get_val(arg, &val) < 0 || (val & ~0xffffffff) != 0) 399 errx(1, "invalid value: %s", arg); 400 401 param.ifbrp_csize = val & 0xffffffff; 402 403 if (do_cmd(s, BRDGSCACHE, ¶m, sizeof(param), 1) < 0) 404 err(1, "BRDGSCACHE %s", arg); 405 } 406 407 static void 408 setbridge_hellotime(const char *arg, int d, int s, const struct afswtch *afp) 409 { 410 struct ifbrparam param; 411 u_long val; 412 413 if (get_val(arg, &val) < 0 || (val & ~0xff) != 0) 414 errx(1, "invalid value: %s", arg); 415 416 param.ifbrp_hellotime = val & 0xff; 417 418 if (do_cmd(s, BRDGSHT, ¶m, sizeof(param), 1) < 0) 419 err(1, "BRDGSHT %s", arg); 420 } 421 422 static void 423 setbridge_fwddelay(const char *arg, int d, int s, const struct afswtch *afp) 424 { 425 struct ifbrparam param; 426 u_long val; 427 428 if (get_val(arg, &val) < 0 || (val & ~0xff) != 0) 429 errx(1, "invalid value: %s", arg); 430 431 param.ifbrp_fwddelay = val & 0xff; 432 433 if (do_cmd(s, BRDGSFD, ¶m, sizeof(param), 1) < 0) 434 err(1, "BRDGSFD %s", arg); 435 } 436 437 static void 438 setbridge_maxage(const char *arg, int d, int s, const struct afswtch *afp) 439 { 440 struct ifbrparam param; 441 u_long val; 442 443 if (get_val(arg, &val) < 0 || (val & ~0xff) != 0) 444 errx(1, "invalid value: %s", arg); 445 446 param.ifbrp_maxage = val & 0xff; 447 448 if (do_cmd(s, BRDGSMA, ¶m, sizeof(param), 1) < 0) 449 err(1, "BRDGSMA %s", arg); 450 } 451 452 static void 453 setbridge_priority(const char *arg, int d, int s, const struct afswtch *afp) 454 { 455 struct ifbrparam param; 456 u_long val; 457 458 if (get_val(arg, &val) < 0 || (val & ~0xffff) != 0) 459 errx(1, "invalid value: %s", arg); 460 461 param.ifbrp_prio = val & 0xffff; 462 463 if (do_cmd(s, BRDGSPRI, ¶m, sizeof(param), 1) < 0) 464 err(1, "BRDGSPRI %s", arg); 465 } 466 467 static void 468 setbridge_ifpriority(const char *ifn, const char *pri, int s, 469 const struct afswtch *afp) 470 { 471 struct ifbreq req; 472 u_long val; 473 474 memset(&req, 0, sizeof(req)); 475 476 if (get_val(pri, &val) < 0 || (val & ~0xff) != 0) 477 errx(1, "invalid value: %s", pri); 478 479 strlcpy(req.ifbr_ifsname, ifn, sizeof(req.ifbr_ifsname)); 480 req.ifbr_priority = val & 0xff; 481 482 if (do_cmd(s, BRDGSIFPRIO, &req, sizeof(req), 1) < 0) 483 err(1, "BRDGSIFPRIO %s", pri); 484 } 485 486 static void 487 setbridge_ifpathcost(const char *ifn, const char *cost, int s, 488 const struct afswtch *afp) 489 { 490 struct ifbreq req; 491 u_long val; 492 493 memset(&req, 0, sizeof(req)); 494 495 if (get_val(cost, &val) < 0 || (val & ~0xff) != 0) 496 errx(1, "invalid value: %s", cost); 497 498 strlcpy(req.ifbr_ifsname, ifn, sizeof(req.ifbr_ifsname)); 499 req.ifbr_path_cost = val & 0xffff; 500 501 if (do_cmd(s, BRDGSIFCOST, &req, sizeof(req), 1) < 0) 502 err(1, "BRDGSIFCOST %s", cost); 503 } 504 505 static void 506 setbridge_timeout(const char *arg, int d, int s, const struct afswtch *afp) 507 { 508 struct ifbrparam param; 509 u_long val; 510 511 if (get_val(arg, &val) < 0 || (val & ~0xffffffff) != 0) 512 errx(1, "invalid value: %s", arg); 513 514 param.ifbrp_ctime = val & 0xffffffff; 515 516 if (do_cmd(s, BRDGSTO, ¶m, sizeof(param), 1) < 0) 517 err(1, "BRDGSTO %s", arg); 518 } 519 520 static struct cmd bridge_cmds[] = { 521 DEF_CMD_ARG("addm", setbridge_add), 522 DEF_CMD_ARG("deletem", setbridge_delete), 523 DEF_CMD_ARG("discover", setbridge_discover), 524 DEF_CMD_ARG("-discover", unsetbridge_discover), 525 DEF_CMD_ARG("learn", setbridge_learn), 526 DEF_CMD_ARG("-learn", unsetbridge_learn), 527 DEF_CMD_ARG("span", setbridge_span), 528 DEF_CMD_ARG("-span", unsetbridge_span), 529 DEF_CMD_ARG("stp", setbridge_stp), 530 DEF_CMD_ARG("-stp", unsetbridge_stp), 531 DEF_CMD("flush", 0, setbridge_flush), 532 DEF_CMD("flushall", 0, setbridge_flushall), 533 DEF_CMD_ARG2("static", setbridge_static), 534 DEF_CMD_ARG("deladdr", setbridge_deladdr), 535 DEF_CMD("addr", 1, getbridge_addr), 536 DEF_CMD_ARG("maxaddr", setbridge_maxaddr), 537 DEF_CMD_ARG("hellotime", setbridge_hellotime), 538 DEF_CMD_ARG("fwddelay", setbridge_fwddelay), 539 DEF_CMD_ARG("maxage", setbridge_maxage), 540 DEF_CMD_ARG("priority", setbridge_priority), 541 DEF_CMD_ARG2("ifpriority", setbridge_ifpriority), 542 DEF_CMD_ARG2("ifpathcost", setbridge_ifpathcost), 543 DEF_CMD_ARG("timeout", setbridge_timeout), 544 }; 545 static struct afswtch af_bridge = { 546 .af_name = "af_bridge", 547 .af_af = AF_UNSPEC, 548 .af_other_status = bridge_status, 549 }; 550 551 static __constructor(100) void 552 bridge_ctor(void) 553 { 554 #define N(a) (sizeof(a) / sizeof(a[0])) 555 int i; 556 557 for (i = 0; i < N(bridge_cmds); i++) 558 cmd_register(&bridge_cmds[i]); 559 af_register(&af_bridge); 560 #undef N 561 } 562