sbin/ifconfig/ifbridge.c

   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 <err.h>
  55 #include <errno.h>
  56
  57 #include "ifconfig.h"
  58
  59 static int
  60 get_val(const char *cp, u_long *valp)
  61 {
  62         char *endptr;
  63         u_long val;
  64
  65         errno = 0;
  66         val = strtoul(cp, &endptr, 0);
  67         if (cp[0] == '\0' || endptr[0] != '\0' || errno == ERANGE)
  68                 return (-1);
  69
  70         *valp = val;
  71         return (0);
  72 }
  73
  74 static int
  75 do_cmd(int sock, u_long op, void *arg, size_t argsize, int set)
  76 {
  77         struct ifdrv ifd;
  78
  79         memset(&ifd, 0, sizeof(ifd));
  80
  81         strlcpy(ifd.ifd_name, ifr.ifr_name, sizeof(ifd.ifd_name));
  82         ifd.ifd_cmd = op;
  83         ifd.ifd_len = argsize;
  84         ifd.ifd_data = arg;
  85
  86         return (ioctl(sock, set ? SIOCSDRVSPEC : SIOCGDRVSPEC, &ifd));
  87 }
  88
  89 static void
  90 do_bridgeflag(int sock, const char *ifs, int flag, int set)
  91 {
  92         struct ifbreq req;
  93
  94         strlcpy(req.ifbr_ifsname, ifs, sizeof(req.ifbr_ifsname));
  95
  96         if (do_cmd(sock, BRDGGIFFLGS, &req, sizeof(req), 0) < 0)
  97                 err(1, "unable to get bridge flags");
  98
  99         if (set)
 100                 req.ifbr_ifsflags |= flag;
 101         else
 102                 req.ifbr_ifsflags &= ~flag;
 103
 104         if (do_cmd(sock, BRDGSIFFLGS, &req, sizeof(req), 1) < 0)
 105                 err(1, "unable to set bridge flags");
 106 }
 107
 108 static void
 109 bridge_interfaces(int s, const char *prefix)
 110 {
 111         static const char *stpstates[] = {
 112                 "disabled",
 113                 "listening",
 114                 "learning",
 115                 "forwarding",
 116                 "blocking",
 117                 "bonded",
 118                 "blocking (link1)"
 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(" pathcost %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                         printf("%sbondweight %u\n",
 167                                 pad, req->ifbr_bond_weight);
 168                         printf("%sdesignated root:   %016jx\n",
 169                                 pad, (intmax_t)req->ifbr_designated_root);
 170                         printf("%sdesignated bridge: %016jx\n",
 171                                 pad, (intmax_t)req->ifbr_designated_bridge);
 172                         printf("%sdesignated cost:   %u\n",
 173                                 pad, req->ifbr_designated_cost);
 174                         printf("%sdesignated port:   %u\n",
 175                                 pad, req->ifbr_designated_port);
 176                         if (verbose) {
 177                                 printf("%speer root:   %016jx\n",
 178                                         pad, (intmax_t)req->ifbr_peer_root);
 179                                 printf("%speer bridge: %016jx\n",
 180                                         pad, (intmax_t)req->ifbr_peer_bridge);
 181                                 printf("%speer cost:   %u\n",
 182                                         pad, req->ifbr_peer_cost);
 183                                 printf("%speer port:   %u\n",
 184                                         pad, req->ifbr_peer_port);
 185                         }
 186                 }
 187         }
 188
 189         free(inbuf);
 190 }
 191
 192 static void
 193 bridge_addresses(int s, const char *prefix)
 194 {
 195         struct ifbaconf ifbac;
 196         struct ifbareq *ifba;
 197         char *inbuf = NULL, *ninbuf;
 198         int i, len = 8192;
 199         struct ether_addr ea;
 200
 201         for (;;) {
 202                 ninbuf = realloc(inbuf, len);
 203                 if (ninbuf == NULL)
 204                         err(1, "unable to allocate address buffer");
 205                 ifbac.ifbac_len = len;
 206                 ifbac.ifbac_buf = inbuf = ninbuf;
 207                 if (do_cmd(s, BRDGRTS, &ifbac, sizeof(ifbac), 0) < 0)
 208                         err(1, "unable to get address cache");
 209                 if ((ifbac.ifbac_len + sizeof(*ifba)) < len)
 210                         break;
 211                 len *= 2;
 212         }
 213
 214         for (i = 0; i < ifbac.ifbac_len / sizeof(*ifba); i++) {
 215                 ifba = ifbac.ifbac_req + i;
 216                 memcpy(ea.octet, ifba->ifba_dst,
 217                     sizeof(ea.octet));
 218                 printf("%s%s %s %lu ", prefix, ether_ntoa(&ea),
 219                     ifba->ifba_ifsname, ifba->ifba_expire);
 220                 printb("flags", ifba->ifba_flags, IFBAFBITS);
 221                 printf("\n");
 222         }
 223
 224         free(inbuf);
 225 }
 226
 227 static void
 228 bridge_status(int s)
 229 {
 230         struct ifbrparam param;
 231         u_int16_t pri;
 232         u_int8_t ht, fd, ma;
 233
 234         if (do_cmd(s, BRDGGPRI, &param, sizeof(param), 0) < 0)
 235                 return;
 236         pri = param.ifbrp_prio;
 237
 238         if (do_cmd(s, BRDGGHT, &param, sizeof(param), 0) < 0)
 239                 return;
 240         ht = param.ifbrp_hellotime;
 241
 242         if (do_cmd(s, BRDGGFD, &param, sizeof(param), 0) < 0)
 243                 return;
 244         fd = param.ifbrp_fwddelay;
 245
 246         if (do_cmd(s, BRDGGMA, &param, sizeof(param), 0) < 0)
 247                 return;
 248         ma = param.ifbrp_maxage;
 249
 250         printf("\tpriority %u hellotime %u fwddelay %u maxage %u\n",
 251             pri, ht, fd, ma);
 252
 253         bridge_interfaces(s, "\tmember: ");
 254
 255         return;
 256
 257 }
 258
 259 static void
 260 setbridge_add(const char *val, int d, int s, const struct afswtch *afp)
 261 {
 262         struct ifbreq req;
 263
 264         memset(&req, 0, sizeof(req));
 265         strlcpy(req.ifbr_ifsname, val, sizeof(req.ifbr_ifsname));
 266         if (do_cmd(s, BRDGADD, &req, sizeof(req), 1) < 0)
 267                 err(1, "BRDGADD %s",  val);
 268 }
 269
 270 static void
 271 setbridge_delete(const char *val, int d, int s, const struct afswtch *afp)
 272 {
 273         struct ifbreq req;
 274
 275         memset(&req, 0, sizeof(req));
 276         strlcpy(req.ifbr_ifsname, val, sizeof(req.ifbr_ifsname));
 277         if (do_cmd(s, BRDGDEL, &req, sizeof(req), 1) < 0)
 278                 err(1, "BRDGDEL %s",  val);
 279 }
 280
 281 static void
 282 setbridge_discover(const char *val, int d, int s, const struct afswtch *afp)
 283 {
 284
 285         do_bridgeflag(s, val, IFBIF_DISCOVER, 1);
 286 }
 287
 288 static void
 289 unsetbridge_discover(const char *val, int d, int s, const struct afswtch *afp)
 290 {
 291
 292         do_bridgeflag(s, val, IFBIF_DISCOVER, 0);
 293 }
 294
 295 static void
 296 setbridge_learn(const char *val, int d, int s, const struct afswtch *afp)
 297 {
 298
 299         do_bridgeflag(s, val, IFBIF_LEARNING,  1);
 300 }
 301
 302 static void
 303 unsetbridge_learn(const char *val, int d, int s, const struct afswtch *afp)
 304 {
 305
 306         do_bridgeflag(s, val, IFBIF_LEARNING,  0);
 307 }
 308
 309 static void
 310 setbridge_span(const char *val, int d, int s, const struct afswtch *afp)
 311 {
 312         struct ifbreq req;
 313
 314         memset(&req, 0, sizeof(req));
 315         strlcpy(req.ifbr_ifsname, val, sizeof(req.ifbr_ifsname));
 316         if (do_cmd(s, BRDGADDS, &req, sizeof(req), 1) < 0)
 317                 err(1, "BRDGADDS %s",  val);
 318 }
 319
 320 static void
 321 unsetbridge_span(const char *val, int d, int s, const struct afswtch *afp)
 322 {
 323         struct ifbreq req;
 324
 325         memset(&req, 0, sizeof(req));
 326         strlcpy(req.ifbr_ifsname, val, sizeof(req.ifbr_ifsname));
 327         if (do_cmd(s, BRDGDELS, &req, sizeof(req), 1) < 0)
 328                 err(1, "BRDGDELS %s",  val);
 329 }
 330
 331 static void
 332 setbridge_stp(const char *val, int d, int s, const struct afswtch *afp)
 333 {
 334
 335         do_bridgeflag(s, val, IFBIF_STP, 1);
 336 }
 337
 338 static void
 339 unsetbridge_stp(const char *val, int d, int s, const struct afswtch *afp)
 340 {
 341
 342         do_bridgeflag(s, val, IFBIF_STP, 0);
 343 }
 344
 345 static void
 346 setbridge_flush(const char *val, int d, int s, const struct afswtch *afp)
 347 {
 348         struct ifbreq req;
 349
 350         memset(&req, 0, sizeof(req));
 351         req.ifbr_ifsflags = IFBF_FLUSHDYN;
 352         if (do_cmd(s, BRDGFLUSH, &req, sizeof(req), 1) < 0)
 353                 err(1, "BRDGFLUSH");
 354 }
 355
 356 static void
 357 setbridge_flushall(const char *val, int d, int s, const struct afswtch *afp)
 358 {
 359         struct ifbreq req;
 360
 361         memset(&req, 0, sizeof(req));
 362         req.ifbr_ifsflags = IFBF_FLUSHALL;
 363         if (do_cmd(s, BRDGFLUSH, &req, sizeof(req), 1) < 0)
 364                 err(1, "BRDGFLUSH");
 365 }
 366
 367 static void
 368 setbridge_static(const char *val, const char *mac, int s,
 369     const struct afswtch *afp)
 370 {
 371         struct ifbareq req;
 372         struct ether_addr *ea;
 373
 374         memset(&req, 0, sizeof(req));
 375         strlcpy(req.ifba_ifsname, val, sizeof(req.ifba_ifsname));
 376
 377         ea = ether_aton(mac);
 378         if (ea == NULL)
 379                 errx(1, "%s: invalid address: %s", val, mac);
 380
 381         memcpy(req.ifba_dst, ea->octet, sizeof(req.ifba_dst));
 382         req.ifba_flags = IFBAF_STATIC;
 383
 384         if (do_cmd(s, BRDGSADDR, &req, sizeof(req), 1) < 0)
 385                 err(1, "BRDGSADDR %s",  val);
 386 }
 387
 388 static void
 389 setbridge_deladdr(const char *val, int d, int s, const struct afswtch *afp)
 390 {
 391         struct ifbareq req;
 392         struct ether_addr *ea;
 393
 394         memset(&req, 0, sizeof(req));
 395
 396         ea = ether_aton(val);
 397         if (ea == NULL)
 398                 errx(1, "invalid address: %s",  val);
 399
 400         memcpy(req.ifba_dst, ea->octet, sizeof(req.ifba_dst));
 401
 402         if (do_cmd(s, BRDGDADDR, &req, sizeof(req), 1) < 0)
 403                 err(1, "BRDGDADDR %s",  val);
 404 }
 405
 406 static void
 407 getbridge_addr(const char *val, int d, int s, const struct afswtch *afp)
 408 {
 409         bridge_addresses(s, "");
 410 }
 411
 412 static void
 413 setbridge_maxaddr(const char *arg, int d, int s, const struct afswtch *afp)
 414 {
 415         struct ifbrparam param;
 416         u_long val;
 417
 418         if (get_val(arg, &val) < 0 || (val & ~0xffffffff) != 0)
 419                 errx(1, "invalid value: %s",  arg);
 420
 421         param.ifbrp_csize = val & 0xffffffff;
 422
 423         if (do_cmd(s, BRDGSCACHE, &param, sizeof(param), 1) < 0)
 424                 err(1, "BRDGSCACHE %s",  arg);
 425 }
 426
 427 static void
 428 setbridge_hellotime(const char *arg, int d, int s, const struct afswtch *afp)
 429 {
 430         struct ifbrparam param;
 431         u_long val;
 432
 433         if (get_val(arg, &val) < 0 || (val & ~0xff) != 0)
 434                 errx(1, "invalid value: %s",  arg);
 435
 436         param.ifbrp_hellotime = val & 0xff;
 437
 438         if (do_cmd(s, BRDGSHT, &param, sizeof(param), 1) < 0)
 439                 err(1, "BRDGSHT %s",  arg);
 440 }
 441
 442 static void
 443 setbridge_fwddelay(const char *arg, int d, int s, const struct afswtch *afp)
 444 {
 445         struct ifbrparam param;
 446         u_long val;
 447
 448         if (get_val(arg, &val) < 0 || (val & ~0xff) != 0)
 449                 errx(1, "invalid value: %s",  arg);
 450
 451         param.ifbrp_fwddelay = val & 0xff;
 452
 453         if (do_cmd(s, BRDGSFD, &param, sizeof(param), 1) < 0)
 454                 err(1, "BRDGSFD %s",  arg);
 455 }
 456
 457 static void
 458 setbridge_maxage(const char *arg, int d, int s, const struct afswtch *afp)
 459 {
 460         struct ifbrparam param;
 461         u_long val;
 462
 463         if (get_val(arg, &val) < 0 || (val & ~0xff) != 0)
 464                 errx(1, "invalid value: %s",  arg);
 465
 466         param.ifbrp_maxage = val & 0xff;
 467
 468         if (do_cmd(s, BRDGSMA, &param, sizeof(param), 1) < 0)
 469                 err(1, "BRDGSMA %s",  arg);
 470 }
 471
 472 static void
 473 setbridge_priority(const char *arg, int d, int s, const struct afswtch *afp)
 474 {
 475         struct ifbrparam param;
 476         u_long val;
 477
 478         if (get_val(arg, &val) < 0 || (val & ~0xffff) != 0)
 479                 errx(1, "invalid value: %s",  arg);
 480
 481         param.ifbrp_prio = val & 0xffff;
 482
 483         if (do_cmd(s, BRDGSPRI, &param, sizeof(param), 1) < 0)
 484                 err(1, "BRDGSPRI %s",  arg);
 485 }
 486
 487 static void
 488 setbridge_ifpriority(const char *ifn, const char *pri, int s,
 489     const struct afswtch *afp)
 490 {
 491         struct ifbreq req;
 492         u_long val;
 493
 494         memset(&req, 0, sizeof(req));
 495
 496         if (get_val(pri, &val) < 0 || (val & ~0xff) != 0)
 497                 errx(1, "invalid value: %s",  pri);
 498
 499         strlcpy(req.ifbr_ifsname, ifn, sizeof(req.ifbr_ifsname));
 500         req.ifbr_priority = val & 0xff;
 501
 502         if (do_cmd(s, BRDGSIFPRIO, &req, sizeof(req), 1) < 0)
 503                 err(1, "BRDGSIFPRIO %s",  pri);
 504 }
 505
 506 static void
 507 setbridge_ifpathcost(const char *ifn, const char *cost, int s,
 508     const struct afswtch *afp)
 509 {
 510         struct ifbreq req;
 511         u_long val;
 512
 513         memset(&req, 0, sizeof(req));
 514
 515         if (get_val(cost, &val) < 0 || (val & ~0xff) != 0)
 516                 errx(1, "invalid value: %s",  cost);
 517
 518         strlcpy(req.ifbr_ifsname, ifn, sizeof(req.ifbr_ifsname));
 519         req.ifbr_path_cost = val & 0xffff;
 520
 521         if (do_cmd(s, BRDGSIFCOST, &req, sizeof(req), 1) < 0)
 522                 err(1, "BRDGSIFCOST %s",  cost);
 523 }
 524
 525 static void
 526 setbridge_ifbondweight(const char *ifn, const char *cost, int s,
 527     const struct afswtch *afp)
 528 {
 529         struct ifbreq req;
 530         u_long val;
 531
 532         memset(&req, 0, sizeof(req));
 533
 534         if (get_val(cost, &val) < 0 || (val & ~0xff) != 0)
 535                 errx(1, "invalid value: %s",  cost);
 536
 537         strlcpy(req.ifbr_ifsname, ifn, sizeof(req.ifbr_ifsname));
 538         if (val > 65535)
 539                 val = 65535;
 540         req.ifbr_bond_weight = (uint16_t)val;
 541
 542         if (do_cmd(s, BRDGSBONDWGHT, &req, sizeof(req), 1) < 0)
 543                 err(1, "BRDGSBONDWGHT %s",  cost);
 544 }
 545
 546 static void
 547 setbridge_timeout(const char *arg, int d, int s, const struct afswtch *afp)
 548 {
 549         struct ifbrparam param;
 550         u_long val;
 551
 552         if (get_val(arg, &val) < 0 || (val & ~0xffffffff) != 0)
 553                 errx(1, "invalid value: %s",  arg);
 554
 555         param.ifbrp_ctime = val & 0xffffffff;
 556
 557         if (do_cmd(s, BRDGSTO, &param, sizeof(param), 1) < 0)
 558                 err(1, "BRDGSTO %s",  arg);
 559 }
 560
 561 static struct cmd bridge_cmds[] = {
 562         DEF_CMD_ARG("addm",             setbridge_add),
 563         DEF_CMD_ARG("deletem",          setbridge_delete),
 564         DEF_CMD_ARG("discover",         setbridge_discover),
 565         DEF_CMD_ARG("-discover",        unsetbridge_discover),
 566         DEF_CMD_ARG("learn",            setbridge_learn),
 567         DEF_CMD_ARG("-learn",           unsetbridge_learn),
 568         DEF_CMD_ARG("span",             setbridge_span),
 569         DEF_CMD_ARG("-span",            unsetbridge_span),
 570         DEF_CMD_ARG("stp",              setbridge_stp),
 571         DEF_CMD_ARG("-stp",             unsetbridge_stp),
 572         DEF_CMD("flush", 0,             setbridge_flush),
 573         DEF_CMD("flushall", 0,          setbridge_flushall),
 574         DEF_CMD_ARG2("static",          setbridge_static),
 575         DEF_CMD_ARG("deladdr",          setbridge_deladdr),
 576         DEF_CMD("addr",  1,             getbridge_addr),
 577         DEF_CMD_ARG("maxaddr",          setbridge_maxaddr),
 578         DEF_CMD_ARG("hellotime",        setbridge_hellotime),
 579         DEF_CMD_ARG("fwddelay",         setbridge_fwddelay),
 580         DEF_CMD_ARG("maxage",           setbridge_maxage),
 581         DEF_CMD_ARG("priority",         setbridge_priority),
 582         DEF_CMD_ARG2("ifpriority",      setbridge_ifpriority),
 583         DEF_CMD_ARG2("ifpathcost",      setbridge_ifpathcost),
 584         DEF_CMD_ARG2("ifbondweight",    setbridge_ifbondweight),
 585         DEF_CMD_ARG("timeout",          setbridge_timeout),
 586 };
 587 static struct afswtch af_bridge = {
 588         .af_name        = "af_bridge",
 589         .af_af          = AF_UNSPEC,
 590         .af_other_status = bridge_status,
 591 };
 592
 593 static __constructor(101) void
 594 bridge_ctor(void)
 595 {
 596 #define N(a)    (sizeof(a) / sizeof(a[0]))
 597         int i;
 598
 599         for (i = 0; i < N(bridge_cmds);  i++)
 600                 cmd_register(&bridge_cmds[i]);
 601         af_register(&af_bridge);
 602 #undef N
 603 }