ifbridge.c revision 146985
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 36#ifndef lint 37static const char rcsid[] = 38 "$FreeBSD: head/sbin/ifconfig/ifbridge.c 146985 2005-06-05 02:59:26Z thompsa $"; 39#endif /* not lint */ 40 41#include <sys/param.h> 42#include <sys/ioctl.h> 43#include <sys/socket.h> 44#include <sys/sockio.h> 45 46#include <stdlib.h> 47#include <unistd.h> 48 49#include <net/ethernet.h> 50#include <net/if.h> 51#include <net/if_bridgevar.h> 52#include <net/route.h> 53 54#include <ctype.h> 55#include <stdio.h> 56#include <string.h> 57#include <stdlib.h> 58#include <unistd.h> 59#include <err.h> 60#include <errno.h> 61 62#include "ifconfig.h" 63 64static int 65get_val(const char *cp, u_long *valp) 66{ 67 char *endptr; 68 u_long val; 69 70 errno = 0; 71 val = strtoul(cp, &endptr, 0); 72 if (cp[0] == '\0' || endptr[0] != '\0' || errno == ERANGE) 73 return (-1); 74 75 *valp = val; 76 return (0); 77} 78 79static int 80do_cmd(int sock, u_long op, void *arg, size_t argsize, int set) 81{ 82 struct ifdrv ifd; 83 84 memset(&ifd, 0, sizeof(ifd)); 85 86 strlcpy(ifd.ifd_name, ifr.ifr_name, sizeof(ifd.ifd_name)); 87 ifd.ifd_cmd = op; 88 ifd.ifd_len = argsize; 89 ifd.ifd_data = arg; 90 91 return (ioctl(sock, set ? SIOCSDRVSPEC : SIOCGDRVSPEC, &ifd)); 92} 93 94static void 95do_bridgeflag(int sock, const char *ifs, int flag, int set) 96{ 97 struct ifbreq req; 98 99 strlcpy(req.ifbr_ifsname, ifs, sizeof(req.ifbr_ifsname)); 100 101 if (do_cmd(sock, BRDGGIFFLGS, &req, sizeof(req), 0) < 0) 102 err(1, "unable to get bridge flags"); 103 104 if (set) 105 req.ifbr_ifsflags |= flag; 106 else 107 req.ifbr_ifsflags &= ~flag; 108 109 if (do_cmd(sock, BRDGSIFFLGS, &req, sizeof(req), 1) < 0) 110 err(1, "unable to set bridge flags"); 111} 112 113static void 114bridge_interfaces(int s, const char *prefix, int flags) 115{ 116 static const char *stpstates[] = { 117 "disabled", 118 "listening", 119 "learning", 120 "forwarding", 121 "blocking", 122 }; 123 struct ifbifconf bifc; 124 struct ifbreq *req; 125 char *inbuf = NULL, *ninbuf; 126 int i, len = 8192; 127 128 for (;;) { 129 ninbuf = realloc(inbuf, len); 130 if (ninbuf == NULL) 131 err(1, "unable to allocate interface buffer"); 132 bifc.ifbic_len = len; 133 bifc.ifbic_buf = inbuf = ninbuf; 134 if (do_cmd(s, BRDGGIFS, &bifc, sizeof(bifc), 0) < 0) 135 err(1, "unable to get interface list"); 136 if ((bifc.ifbic_len + sizeof(*req)) < len) 137 break; 138 len *= 2; 139 } 140 141 for (i = 0; i < bifc.ifbic_len / sizeof(*req); i++) { 142 req = bifc.ifbic_req + i; 143 printf("%s%s ", prefix, req->ifbr_ifsname); 144 printb("flags", req->ifbr_ifsflags, IFBIFBITS); 145 printf("\n"); 146 147 if (!flags) continue; 148 149 printf("%s\t", prefix); 150 printf("port %u priority %u", 151 req->ifbr_portno, req->ifbr_priority); 152 if (req->ifbr_ifsflags & IFBIF_STP) { 153 printf(" path cost %u", req->ifbr_path_cost); 154 if (req->ifbr_state < 155 sizeof(stpstates) / sizeof(stpstates[0])) 156 printf(" %s", stpstates[req->ifbr_state]); 157 else 158 printf(" <unknown state %d>", 159 req->ifbr_state); 160 } 161 printf("\n"); 162 } 163 164 free(inbuf); 165} 166 167static void 168bridge_addresses(int s, const char *prefix) 169{ 170 struct ifbaconf ifbac; 171 struct ifbareq *ifba; 172 char *inbuf = NULL, *ninbuf; 173 int i, len = 8192; 174 struct ether_addr ea; 175 176 for (;;) { 177 ninbuf = realloc(inbuf, len); 178 if (ninbuf == NULL) 179 err(1, "unable to allocate address buffer"); 180 ifbac.ifbac_len = len; 181 ifbac.ifbac_buf = inbuf = ninbuf; 182 if (do_cmd(s, BRDGRTS, &ifbac, sizeof(ifbac), 0) < 0) 183 err(1, "unable to get address cache"); 184 if ((ifbac.ifbac_len + sizeof(*ifba)) < len) 185 break; 186 len *= 2; 187 } 188 189 for (i = 0; i < ifbac.ifbac_len / sizeof(*ifba); i++) { 190 ifba = ifbac.ifbac_req + i; 191 memcpy(ea.octet, ifba->ifba_dst, 192 sizeof(ea.octet)); 193 printf("%s%s %s %lu ", prefix, ether_ntoa(&ea), 194 ifba->ifba_ifsname, ifba->ifba_expire); 195 printb("flags", ifba->ifba_flags, IFBAFBITS); 196 printf("\n"); 197 } 198 199 free(inbuf); 200} 201 202static void 203bridge_status(int s) 204{ 205 struct ifbrparam param; 206 u_int16_t pri; 207 u_int8_t ht, fd, ma; 208 209 if (do_cmd(s, BRDGGPRI, ¶m, sizeof(param), 0) < 0) 210 return; 211 pri = param.ifbrp_prio; 212 213 if (do_cmd(s, BRDGGHT, ¶m, sizeof(param), 0) < 0) 214 return; 215 ht = param.ifbrp_hellotime; 216 217 if (do_cmd(s, BRDGGFD, ¶m, sizeof(param), 0) < 0) 218 return; 219 fd = param.ifbrp_fwddelay; 220 221 if (do_cmd(s, BRDGGMA, ¶m, sizeof(param), 0) < 0) 222 return; 223 ma = param.ifbrp_maxage; 224 225 printf("\tpriority %u hellotime %u fwddelay %u maxage %u\n", 226 pri, ht, fd, ma); 227 228 bridge_interfaces(s, "\tmember: ", 0); 229 230 return; 231 232} 233 234static void 235setbridge_add(const char *val, int d, int s, const struct afswtch *afp) 236{ 237 struct ifbreq req; 238 239 memset(&req, 0, sizeof(req)); 240 strlcpy(req.ifbr_ifsname, val, sizeof(req.ifbr_ifsname)); 241 if (do_cmd(s, BRDGADD, &req, sizeof(req), 1) < 0) 242 err(1, "BRDGADD %s", val); 243} 244 245static void 246setbridge_delete(const char *val, int d, int s, const struct afswtch *afp) 247{ 248 struct ifbreq req; 249 250 memset(&req, 0, sizeof(req)); 251 strlcpy(req.ifbr_ifsname, val, sizeof(req.ifbr_ifsname)); 252 if (do_cmd(s, BRDGDEL, &req, sizeof(req), 1) < 0) 253 err(1, "BRDGDEL %s", val); 254} 255 256static void 257setbridge_discover(const char *val, int d, int s, const struct afswtch *afp) 258{ 259 260 do_bridgeflag(s, val, IFBIF_DISCOVER, 1); 261} 262 263static void 264unsetbridge_discover(const char *val, int d, int s, const struct afswtch *afp) 265{ 266 267 do_bridgeflag(s, val, IFBIF_DISCOVER, 0); 268} 269 270static void 271setbridge_learn(const char *val, int d, int s, const struct afswtch *afp) 272{ 273 274 do_bridgeflag(s, val, IFBIF_LEARNING, 1); 275} 276 277static void 278unsetbridge_learn(const char *val, int d, int s, const struct afswtch *afp) 279{ 280 281 do_bridgeflag(s, val, IFBIF_LEARNING, 0); 282} 283 284static void 285setbridge_stp(const char *val, int d, int s, const struct afswtch *afp) 286{ 287 288 do_bridgeflag(s, val, IFBIF_STP, 1); 289} 290 291static void 292unsetbridge_stp(const char *val, int d, int s, const struct afswtch *afp) 293{ 294 295 do_bridgeflag(s, val, IFBIF_STP, 0); 296} 297 298static void 299setbridge_flush(const char *val, int d, int s, const struct afswtch *afp) 300{ 301 struct ifbreq req; 302 303 memset(&req, 0, sizeof(req)); 304 req.ifbr_ifsflags = IFBF_FLUSHDYN; 305 if (do_cmd(s, BRDGFLUSH, &req, sizeof(req), 1) < 0) 306 err(1, "BRDGFLUSH"); 307} 308 309static void 310setbridge_flushall(const char *val, int d, int s, const struct afswtch *afp) 311{ 312 struct ifbreq req; 313 314 memset(&req, 0, sizeof(req)); 315 req.ifbr_ifsflags = IFBF_FLUSHALL; 316 if (do_cmd(s, BRDGFLUSH, &req, sizeof(req), 1) < 0) 317 err(1, "BRDGFLUSH"); 318} 319 320static void 321setbridge_static(const char *val, const char *mac, int s, 322 const struct afswtch *afp) 323{ 324 struct ifbareq req; 325 struct ether_addr *ea; 326 327 memset(&req, 0, sizeof(req)); 328 strlcpy(req.ifba_ifsname, val, sizeof(req.ifba_ifsname)); 329 330 ea = ether_aton(mac); 331 if (ea == NULL) 332 errx(1, "%s: invalid address: %s", val, mac); 333 334 memcpy(req.ifba_dst, ea->octet, sizeof(req.ifba_dst)); 335 req.ifba_flags = IFBAF_STATIC; 336 337 if (do_cmd(s, BRDGSADDR, &req, sizeof(req), 1) < 0) 338 err(1, "BRDGSADDR %s", val); 339} 340 341static void 342setbridge_deladdr(const char *val, int d, int s, const struct afswtch *afp) 343{ 344 struct ifbareq req; 345 struct ether_addr *ea; 346 347 memset(&req, 0, sizeof(req)); 348 349 ea = ether_aton(val); 350 if (ea == NULL) 351 errx(1, "invalid address: %s", val); 352 353 memcpy(req.ifba_dst, ea->octet, sizeof(req.ifba_dst)); 354 355 if (do_cmd(s, BRDGDADDR, &req, sizeof(req), 1) < 0) 356 err(1, "BRDGDADDR %s", val); 357} 358 359static void 360setbridge_addr(const char *val, int d, int s, const struct afswtch *afp) 361{ 362 363 bridge_addresses(s, ""); 364} 365 366static void 367setbridge_maxaddr(const char *arg, int d, int s, const struct afswtch *afp) 368{ 369 struct ifbrparam param; 370 u_long val; 371 372 if (get_val(arg, &val) < 0 || (val & ~0xffffffff) != 0) 373 errx(1, "invalid value: %s", arg); 374 375 param.ifbrp_csize = val & 0xffffffff; 376 377 if (do_cmd(s, BRDGSCACHE, ¶m, sizeof(param), 1) < 0) 378 err(1, "BRDGSCACHE %s", arg); 379} 380 381static void 382setbridge_hellotime(const char *arg, int d, int s, const struct afswtch *afp) 383{ 384 struct ifbrparam param; 385 u_long val; 386 387 if (get_val(arg, &val) < 0 || (val & ~0xff) != 0) 388 errx(1, "invalid value: %s", arg); 389 390 param.ifbrp_hellotime = val & 0xff; 391 392 if (do_cmd(s, BRDGSHT, ¶m, sizeof(param), 1) < 0) 393 err(1, "BRDGSHT %s", arg); 394} 395 396static void 397setbridge_fwddelay(const char *arg, int d, int s, const struct afswtch *afp) 398{ 399 struct ifbrparam param; 400 u_long val; 401 402 if (get_val(arg, &val) < 0 || (val & ~0xff) != 0) 403 errx(1, "invalid value: %s", arg); 404 405 param.ifbrp_fwddelay = val & 0xff; 406 407 if (do_cmd(s, BRDGSFD, ¶m, sizeof(param), 1) < 0) 408 err(1, "BRDGSFD %s", arg); 409} 410 411static void 412setbridge_maxage(const char *arg, int d, int s, const struct afswtch *afp) 413{ 414 struct ifbrparam param; 415 u_long val; 416 417 if (get_val(arg, &val) < 0 || (val & ~0xff) != 0) 418 errx(1, "invalid value: %s", arg); 419 420 param.ifbrp_maxage = val & 0xff; 421 422 if (do_cmd(s, BRDGSMA, ¶m, sizeof(param), 1) < 0) 423 err(1, "BRDGSMA %s", arg); 424} 425 426static void 427setbridge_priority(const char *arg, int d, int s, const struct afswtch *afp) 428{ 429 struct ifbrparam param; 430 u_long val; 431 432 if (get_val(arg, &val) < 0 || (val & ~0xffff) != 0) 433 errx(1, "invalid value: %s", arg); 434 435 param.ifbrp_prio = val & 0xffff; 436 437 if (do_cmd(s, BRDGSPRI, ¶m, sizeof(param), 1) < 0) 438 err(1, "BRDGSPRI %s", arg); 439} 440 441static void 442setbridge_ifpriority(const char *ifn, const char *pri, int s, 443 const struct afswtch *afp) 444{ 445 struct ifbreq req; 446 u_long val; 447 448 memset(&req, 0, sizeof(req)); 449 450 if (get_val(pri, &val) < 0 || (val & ~0xff) != 0) 451 errx(1, "invalid value: %s", pri); 452 453 strlcpy(req.ifbr_ifsname, ifn, sizeof(req.ifbr_ifsname)); 454 req.ifbr_priority = val & 0xff; 455 456 if (do_cmd(s, BRDGSIFPRIO, &req, sizeof(req), 1) < 0) 457 err(1, "BRDGSIFPRIO %s", pri); 458} 459 460static void 461setbridge_ifpathcost(const char *ifn, const char *cost, int s, 462 const struct afswtch *afp) 463{ 464 struct ifbreq req; 465 u_long val; 466 467 memset(&req, 0, sizeof(req)); 468 469 if (get_val(cost, &val) < 0 || (val & ~0xff) != 0) 470 errx(1, "invalid value: %s", cost); 471 472 strlcpy(req.ifbr_ifsname, ifn, sizeof(req.ifbr_ifsname)); 473 req.ifbr_path_cost = val & 0xffff; 474 475 if (do_cmd(s, BRDGSIFCOST, &req, sizeof(req), 1) < 0) 476 err(1, "BRDGSIFCOST %s", cost); 477} 478 479static void 480setbridge_timeout(const char *arg, int d, int s, const struct afswtch *afp) 481{ 482 struct ifbrparam param; 483 u_long val; 484 485 if (get_val(arg, &val) < 0 || (val & ~0xffffffff) != 0) 486 errx(1, "invalid value: %s", arg); 487 488 param.ifbrp_ctime = val & 0xffffffff; 489 490 if (do_cmd(s, BRDGSTO, ¶m, sizeof(param), 1) < 0) 491 err(1, "BRDGSTO %s", arg); 492} 493 494static struct cmd bridge_cmds[] = { 495 DEF_CMD_ARG("addm", setbridge_add), 496 DEF_CMD_ARG("deletem", setbridge_delete), 497 DEF_CMD_ARG("discover", setbridge_discover), 498 DEF_CMD_ARG("-discover", unsetbridge_discover), 499 DEF_CMD_ARG("learn", setbridge_learn), 500 DEF_CMD_ARG("-learn", unsetbridge_learn), 501 DEF_CMD_ARG("stp", setbridge_stp), 502 DEF_CMD_ARG("-stp", unsetbridge_stp), 503 DEF_CMD("flush", 0, setbridge_flush), 504 DEF_CMD("flushall", 0, setbridge_flushall), 505 DEF_CMD_ARG2("static", setbridge_static), 506 DEF_CMD_ARG("deladdr", setbridge_deladdr), 507 DEF_CMD("addr", 1, setbridge_addr), 508 DEF_CMD_ARG("maxaddr", setbridge_maxaddr), 509 DEF_CMD_ARG("hellotime", setbridge_hellotime), 510 DEF_CMD_ARG("fwddelay", setbridge_fwddelay), 511 DEF_CMD_ARG("maxage", setbridge_maxage), 512 DEF_CMD_ARG("priority", setbridge_priority), 513 DEF_CMD_ARG2("ifpriority", setbridge_ifpriority), 514 DEF_CMD_ARG2("ifpathcost", setbridge_ifpathcost), 515 DEF_CMD_ARG("timeout", setbridge_timeout), 516}; 517static struct afswtch af_bridge = { 518 .af_name = "af_bridge", 519 .af_af = AF_UNSPEC, 520 .af_other_status = bridge_status, 521}; 522 523static __constructor void 524bridge_ctor(void) 525{ 526#define N(a) (sizeof(a) / sizeof(a[0])) 527 int i; 528 529 for (i = 0; i < N(bridge_cmds); i++) 530 cmd_register(&bridge_cmds[i]); 531 af_register(&af_bridge); 532#undef N 533} 534