ifbridge.c revision 151040
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 151040 2005-10-07 00:32:16Z 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) 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 char *p, *pad; 127 int i, len = 8192; 128 129 pad = strdup(prefix); 130 if (pad == NULL) 131 err(1, "strdup"); 132 /* replace the prefix with whitespace */ 133 for (p = pad; *p != '\0'; p++) { 134 if(isprint(*p)) 135 *p = ' '; 136 } 137 138 for (;;) { 139 ninbuf = realloc(inbuf, len); 140 if (ninbuf == NULL) 141 err(1, "unable to allocate interface buffer"); 142 bifc.ifbic_len = len; 143 bifc.ifbic_buf = inbuf = ninbuf; 144 if (do_cmd(s, BRDGGIFS, &bifc, sizeof(bifc), 0) < 0) 145 err(1, "unable to get interface list"); 146 if ((bifc.ifbic_len + sizeof(*req)) < len) 147 break; 148 len *= 2; 149 } 150 151 for (i = 0; i < bifc.ifbic_len / sizeof(*req); i++) { 152 req = bifc.ifbic_req + i; 153 printf("%s%s ", prefix, req->ifbr_ifsname); 154 printb("flags", req->ifbr_ifsflags, IFBIFBITS); 155 printf("\n"); 156 157 if (req->ifbr_ifsflags & IFBIF_STP) { 158 printf("%s", pad); 159 printf("port %u priority %u", 160 req->ifbr_portno, req->ifbr_priority); 161 printf(" path cost %u", req->ifbr_path_cost); 162 if (req->ifbr_state < 163 sizeof(stpstates) / sizeof(stpstates[0])) 164 printf(" %s", stpstates[req->ifbr_state]); 165 else 166 printf(" <unknown state %d>", 167 req->ifbr_state); 168 printf("\n"); 169 } 170 } 171 172 free(inbuf); 173} 174 175static void 176bridge_addresses(int s, const char *prefix) 177{ 178 struct ifbaconf ifbac; 179 struct ifbareq *ifba; 180 char *inbuf = NULL, *ninbuf; 181 int i, len = 8192; 182 struct ether_addr ea; 183 184 for (;;) { 185 ninbuf = realloc(inbuf, len); 186 if (ninbuf == NULL) 187 err(1, "unable to allocate address buffer"); 188 ifbac.ifbac_len = len; 189 ifbac.ifbac_buf = inbuf = ninbuf; 190 if (do_cmd(s, BRDGRTS, &ifbac, sizeof(ifbac), 0) < 0) 191 err(1, "unable to get address cache"); 192 if ((ifbac.ifbac_len + sizeof(*ifba)) < len) 193 break; 194 len *= 2; 195 } 196 197 for (i = 0; i < ifbac.ifbac_len / sizeof(*ifba); i++) { 198 ifba = ifbac.ifbac_req + i; 199 memcpy(ea.octet, ifba->ifba_dst, 200 sizeof(ea.octet)); 201 printf("%s%s %s %lu ", prefix, ether_ntoa(&ea), 202 ifba->ifba_ifsname, ifba->ifba_expire); 203 printb("flags", ifba->ifba_flags, IFBAFBITS); 204 printf("\n"); 205 } 206 207 free(inbuf); 208} 209 210static void 211bridge_status(int s) 212{ 213 struct ifbrparam param; 214 u_int16_t pri; 215 u_int8_t ht, fd, ma; 216 217 if (do_cmd(s, BRDGGPRI, ¶m, sizeof(param), 0) < 0) 218 return; 219 pri = param.ifbrp_prio; 220 221 if (do_cmd(s, BRDGGHT, ¶m, sizeof(param), 0) < 0) 222 return; 223 ht = param.ifbrp_hellotime; 224 225 if (do_cmd(s, BRDGGFD, ¶m, sizeof(param), 0) < 0) 226 return; 227 fd = param.ifbrp_fwddelay; 228 229 if (do_cmd(s, BRDGGMA, ¶m, sizeof(param), 0) < 0) 230 return; 231 ma = param.ifbrp_maxage; 232 233 printf("\tpriority %u hellotime %u fwddelay %u maxage %u\n", 234 pri, ht, fd, ma); 235 236 bridge_interfaces(s, "\tmember: "); 237 238 return; 239 240} 241 242static void 243setbridge_add(const char *val, int d, int s, const struct afswtch *afp) 244{ 245 struct ifbreq req; 246 247 memset(&req, 0, sizeof(req)); 248 strlcpy(req.ifbr_ifsname, val, sizeof(req.ifbr_ifsname)); 249 if (do_cmd(s, BRDGADD, &req, sizeof(req), 1) < 0) 250 err(1, "BRDGADD %s", val); 251} 252 253static void 254setbridge_delete(const char *val, int d, int s, const struct afswtch *afp) 255{ 256 struct ifbreq req; 257 258 memset(&req, 0, sizeof(req)); 259 strlcpy(req.ifbr_ifsname, val, sizeof(req.ifbr_ifsname)); 260 if (do_cmd(s, BRDGDEL, &req, sizeof(req), 1) < 0) 261 err(1, "BRDGDEL %s", val); 262} 263 264static void 265setbridge_discover(const char *val, int d, int s, const struct afswtch *afp) 266{ 267 268 do_bridgeflag(s, val, IFBIF_DISCOVER, 1); 269} 270 271static void 272unsetbridge_discover(const char *val, int d, int s, const struct afswtch *afp) 273{ 274 275 do_bridgeflag(s, val, IFBIF_DISCOVER, 0); 276} 277 278static void 279setbridge_learn(const char *val, int d, int s, const struct afswtch *afp) 280{ 281 282 do_bridgeflag(s, val, IFBIF_LEARNING, 1); 283} 284 285static void 286unsetbridge_learn(const char *val, int d, int s, const struct afswtch *afp) 287{ 288 289 do_bridgeflag(s, val, IFBIF_LEARNING, 0); 290} 291 292static void 293setbridge_stp(const char *val, int d, int s, const struct afswtch *afp) 294{ 295 296 do_bridgeflag(s, val, IFBIF_STP, 1); 297} 298 299static void 300unsetbridge_stp(const char *val, int d, int s, const struct afswtch *afp) 301{ 302 303 do_bridgeflag(s, val, IFBIF_STP, 0); 304} 305 306static void 307setbridge_flush(const char *val, int d, int s, const struct afswtch *afp) 308{ 309 struct ifbreq req; 310 311 memset(&req, 0, sizeof(req)); 312 req.ifbr_ifsflags = IFBF_FLUSHDYN; 313 if (do_cmd(s, BRDGFLUSH, &req, sizeof(req), 1) < 0) 314 err(1, "BRDGFLUSH"); 315} 316 317static void 318setbridge_flushall(const char *val, int d, int s, const struct afswtch *afp) 319{ 320 struct ifbreq req; 321 322 memset(&req, 0, sizeof(req)); 323 req.ifbr_ifsflags = IFBF_FLUSHALL; 324 if (do_cmd(s, BRDGFLUSH, &req, sizeof(req), 1) < 0) 325 err(1, "BRDGFLUSH"); 326} 327 328static void 329setbridge_static(const char *val, const char *mac, int s, 330 const struct afswtch *afp) 331{ 332 struct ifbareq req; 333 struct ether_addr *ea; 334 335 memset(&req, 0, sizeof(req)); 336 strlcpy(req.ifba_ifsname, val, sizeof(req.ifba_ifsname)); 337 338 ea = ether_aton(mac); 339 if (ea == NULL) 340 errx(1, "%s: invalid address: %s", val, mac); 341 342 memcpy(req.ifba_dst, ea->octet, sizeof(req.ifba_dst)); 343 req.ifba_flags = IFBAF_STATIC; 344 345 if (do_cmd(s, BRDGSADDR, &req, sizeof(req), 1) < 0) 346 err(1, "BRDGSADDR %s", val); 347} 348 349static void 350setbridge_deladdr(const char *val, int d, int s, const struct afswtch *afp) 351{ 352 struct ifbareq req; 353 struct ether_addr *ea; 354 355 memset(&req, 0, sizeof(req)); 356 357 ea = ether_aton(val); 358 if (ea == NULL) 359 errx(1, "invalid address: %s", val); 360 361 memcpy(req.ifba_dst, ea->octet, sizeof(req.ifba_dst)); 362 363 if (do_cmd(s, BRDGDADDR, &req, sizeof(req), 1) < 0) 364 err(1, "BRDGDADDR %s", val); 365} 366 367static void 368setbridge_addr(const char *val, int d, int s, const struct afswtch *afp) 369{ 370 371 bridge_addresses(s, ""); 372} 373 374static void 375setbridge_maxaddr(const char *arg, int d, int s, const struct afswtch *afp) 376{ 377 struct ifbrparam param; 378 u_long val; 379 380 if (get_val(arg, &val) < 0 || (val & ~0xffffffff) != 0) 381 errx(1, "invalid value: %s", arg); 382 383 param.ifbrp_csize = val & 0xffffffff; 384 385 if (do_cmd(s, BRDGSCACHE, ¶m, sizeof(param), 1) < 0) 386 err(1, "BRDGSCACHE %s", arg); 387} 388 389static void 390setbridge_hellotime(const char *arg, int d, int s, const struct afswtch *afp) 391{ 392 struct ifbrparam param; 393 u_long val; 394 395 if (get_val(arg, &val) < 0 || (val & ~0xff) != 0) 396 errx(1, "invalid value: %s", arg); 397 398 param.ifbrp_hellotime = val & 0xff; 399 400 if (do_cmd(s, BRDGSHT, ¶m, sizeof(param), 1) < 0) 401 err(1, "BRDGSHT %s", arg); 402} 403 404static void 405setbridge_fwddelay(const char *arg, int d, int s, const struct afswtch *afp) 406{ 407 struct ifbrparam param; 408 u_long val; 409 410 if (get_val(arg, &val) < 0 || (val & ~0xff) != 0) 411 errx(1, "invalid value: %s", arg); 412 413 param.ifbrp_fwddelay = val & 0xff; 414 415 if (do_cmd(s, BRDGSFD, ¶m, sizeof(param), 1) < 0) 416 err(1, "BRDGSFD %s", arg); 417} 418 419static void 420setbridge_maxage(const char *arg, int d, int s, const struct afswtch *afp) 421{ 422 struct ifbrparam param; 423 u_long val; 424 425 if (get_val(arg, &val) < 0 || (val & ~0xff) != 0) 426 errx(1, "invalid value: %s", arg); 427 428 param.ifbrp_maxage = val & 0xff; 429 430 if (do_cmd(s, BRDGSMA, ¶m, sizeof(param), 1) < 0) 431 err(1, "BRDGSMA %s", arg); 432} 433 434static void 435setbridge_priority(const char *arg, int d, int s, const struct afswtch *afp) 436{ 437 struct ifbrparam param; 438 u_long val; 439 440 if (get_val(arg, &val) < 0 || (val & ~0xffff) != 0) 441 errx(1, "invalid value: %s", arg); 442 443 param.ifbrp_prio = val & 0xffff; 444 445 if (do_cmd(s, BRDGSPRI, ¶m, sizeof(param), 1) < 0) 446 err(1, "BRDGSPRI %s", arg); 447} 448 449static void 450setbridge_ifpriority(const char *ifn, const char *pri, int s, 451 const struct afswtch *afp) 452{ 453 struct ifbreq req; 454 u_long val; 455 456 memset(&req, 0, sizeof(req)); 457 458 if (get_val(pri, &val) < 0 || (val & ~0xff) != 0) 459 errx(1, "invalid value: %s", pri); 460 461 strlcpy(req.ifbr_ifsname, ifn, sizeof(req.ifbr_ifsname)); 462 req.ifbr_priority = val & 0xff; 463 464 if (do_cmd(s, BRDGSIFPRIO, &req, sizeof(req), 1) < 0) 465 err(1, "BRDGSIFPRIO %s", pri); 466} 467 468static void 469setbridge_ifpathcost(const char *ifn, const char *cost, int s, 470 const struct afswtch *afp) 471{ 472 struct ifbreq req; 473 u_long val; 474 475 memset(&req, 0, sizeof(req)); 476 477 if (get_val(cost, &val) < 0 || (val & ~0xff) != 0) 478 errx(1, "invalid value: %s", cost); 479 480 strlcpy(req.ifbr_ifsname, ifn, sizeof(req.ifbr_ifsname)); 481 req.ifbr_path_cost = val & 0xffff; 482 483 if (do_cmd(s, BRDGSIFCOST, &req, sizeof(req), 1) < 0) 484 err(1, "BRDGSIFCOST %s", cost); 485} 486 487static void 488setbridge_timeout(const char *arg, int d, int s, const struct afswtch *afp) 489{ 490 struct ifbrparam param; 491 u_long val; 492 493 if (get_val(arg, &val) < 0 || (val & ~0xffffffff) != 0) 494 errx(1, "invalid value: %s", arg); 495 496 param.ifbrp_ctime = val & 0xffffffff; 497 498 if (do_cmd(s, BRDGSTO, ¶m, sizeof(param), 1) < 0) 499 err(1, "BRDGSTO %s", arg); 500} 501 502static struct cmd bridge_cmds[] = { 503 DEF_CMD_ARG("addm", setbridge_add), 504 DEF_CMD_ARG("deletem", setbridge_delete), 505 DEF_CMD_ARG("discover", setbridge_discover), 506 DEF_CMD_ARG("-discover", unsetbridge_discover), 507 DEF_CMD_ARG("learn", setbridge_learn), 508 DEF_CMD_ARG("-learn", unsetbridge_learn), 509 DEF_CMD_ARG("stp", setbridge_stp), 510 DEF_CMD_ARG("-stp", unsetbridge_stp), 511 DEF_CMD("flush", 0, setbridge_flush), 512 DEF_CMD("flushall", 0, setbridge_flushall), 513 DEF_CMD_ARG2("static", setbridge_static), 514 DEF_CMD_ARG("deladdr", setbridge_deladdr), 515 DEF_CMD("addr", 1, setbridge_addr), 516 DEF_CMD_ARG("maxaddr", setbridge_maxaddr), 517 DEF_CMD_ARG("hellotime", setbridge_hellotime), 518 DEF_CMD_ARG("fwddelay", setbridge_fwddelay), 519 DEF_CMD_ARG("maxage", setbridge_maxage), 520 DEF_CMD_ARG("priority", setbridge_priority), 521 DEF_CMD_ARG2("ifpriority", setbridge_ifpriority), 522 DEF_CMD_ARG2("ifpathcost", setbridge_ifpathcost), 523 DEF_CMD_ARG("timeout", setbridge_timeout), 524}; 525static struct afswtch af_bridge = { 526 .af_name = "af_bridge", 527 .af_af = AF_UNSPEC, 528 .af_other_status = bridge_status, 529}; 530 531static __constructor void 532bridge_ctor(void) 533{ 534#define N(a) (sizeof(a) / sizeof(a[0])) 535 int i; 536 537 for (i = 0; i < N(bridge_cmds); i++) 538 cmd_register(&bridge_cmds[i]); 539 af_register(&af_bridge); 540#undef N 541} 542