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