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  * $DragonFly: src/sbin/ifconfig/ifbridge.c,v 1.2 2006/06/30 16:50:01 geekgod Exp $
  37  */
  38
  39 #include <sys/param.h>
  40 #include <sys/ioctl.h>
  41 #include <sys/socket.h>
  42 #include <sys/sockio.h>
  43
  44 #include <stdlib.h>
  45 #include <unistd.h>
  46
  47 #include <net/ethernet.h>
  48 #include <net/if.h>
  49 #include <net/bridge/if_bridgevar.h>
  50 #include <net/route.h>
  51
  52 #include <ctype.h>
  53 #include <stdio.h>
  54 #include <string.h>
  55 #include <stdlib.h>
  56 #include <unistd.h>
  57 #include <err.h>
  58 #include <errno.h>
  59
  60 #include "ifconfig.h"
  61
  62 static int
  63 get_val(const char *cp, u_long *valp)
  64 {
  65         char *endptr;
  66         u_long val;
  67
  68         errno = 0;
  69         val = strtoul(cp, &endptr, 0);
  70         if (cp[0] == '\0' || endptr[0] != '\0' || errno == ERANGE)
  71                 return (-1);
  72
  73         *valp = val;
  74         return (0);
  75 }
  76
  77 static int
  78 do_cmd(int sock, u_long op, void *arg, size_t argsize, int set)
  79 {
  80         struct ifdrv ifd;
  81
  82         memset(&ifd, 0, sizeof(ifd));
  83
  84         strlcpy(ifd.ifd_name, ifr.ifr_name, sizeof(ifd.ifd_name));
  85         ifd.ifd_cmd = op;
  86         ifd.ifd_len = argsize;
  87         ifd.ifd_data = arg;
  88
  89         return (ioctl(sock, set ? SIOCSDRVSPEC : SIOCGDRVSPEC, &ifd));
  90 }
  91
  92 static void
  93 do_bridgeflag(int sock, const char *ifs, int flag, int set)
  94 {
  95         struct ifbreq req;
  96
  97         strlcpy(req.ifbr_ifsname, ifs, sizeof(req.ifbr_ifsname));
  98
  99         if (do_cmd(sock, BRDGGIFFLGS, &req, sizeof(req), 0) < 0)
 100                 err(1, "unable to get bridge flags");
 101
 102         if (set)
 103                 req.ifbr_ifsflags |= flag;
 104         else
 105                 req.ifbr_ifsflags &= ~flag;
 106
 107         if (do_cmd(sock, BRDGSIFFLGS, &req, sizeof(req), 1) < 0)
 108                 err(1, "unable to set bridge flags");
 109 }
 110
 111 static void
 112 bridge_interfaces(int s, const char *prefix)
 113 {
 114         static const char *stpstates[] = {
 115                 "disabled",
 116                 "listening",
 117                 "learning",
 118                 "forwarding",
 119                 "blocking",
 120         };
 121         struct ifbifconf bifc;
 122         struct ifbreq *req;
 123         char *inbuf = NULL, *ninbuf;
 124         char *p, *pad;
 125         int i, len = 8192;
 126
 127         pad = strdup(prefix);
 128         if (pad == NULL)
 129                 err(1, "strdup");
 130         /* replace the prefix with whitespace */
 131         for (p = pad; *p != '\0'; p++) {
 132                 if(isprint(*p))
 133                         *p = ' ';
 134         }
 135
 136         for (;;) {
 137                 ninbuf = realloc(inbuf, len);
 138                 if (ninbuf == NULL)
 139                         err(1, "unable to allocate interface buffer");
 140                 bifc.ifbic_len = len;
 141                 bifc.ifbic_buf = inbuf = ninbuf;
 142                 if (do_cmd(s, BRDGGIFS, &bifc, sizeof(bifc), 0) < 0)
 143                         err(1, "unable to get interface list");
 144                 if ((bifc.ifbic_len + sizeof(*req)) < len)
 145                         break;
 146                 len *= 2;
 147         }
 148
 149         for (i = 0; i < bifc.ifbic_len / sizeof(*req); i++) {
 150                 req = bifc.ifbic_req + i;
 151                 printf("%s%s ", prefix, req->ifbr_ifsname);
 152                 printb("flags", req->ifbr_ifsflags, IFBIFBITS);
 153                 printf("\n");
 154
 155                 if (req->ifbr_ifsflags & IFBIF_STP) {
 156                         printf("%s", pad);
 157                         printf("port %u priority %u",
 158                             req->ifbr_portno, req->ifbr_priority);
 159                         printf(" path cost %u", req->ifbr_path_cost);
 160                         if (req->ifbr_state <
 161                             sizeof(stpstates) / sizeof(stpstates[0]))
 162                                 printf(" %s", stpstates[req->ifbr_state]);
 163                         else
 164                                 printf(" <unknown state %d>",
 165                                     req->ifbr_state);
 166                         printf("\n");
 167                 }
 168         }
 169
 170         free(inbuf);
 171 }
 172
 173 static void
 174 bridge_addresses(int s, const char *prefix)
 175 {
 176         struct ifbaconf ifbac;
 177         struct ifbareq *ifba;
 178         char *inbuf = NULL, *ninbuf;
 179         int i, len = 8192;
 180         struct ether_addr ea;
 181
 182         for (;;) {
 183                 ninbuf = realloc(inbuf, len);
 184                 if (ninbuf == NULL)
 185                         err(1, "unable to allocate address buffer");
 186                 ifbac.ifbac_len = len;
 187                 ifbac.ifbac_buf = inbuf = ninbuf;
 188                 if (do_cmd(s, BRDGRTS, &ifbac, sizeof(ifbac), 0) < 0)
 189                         err(1, "unable to get address cache");
 190                 if ((ifbac.ifbac_len + sizeof(*ifba)) < len)
 191                         break;
 192                 len *= 2;
 193         }
 194
 195         for (i = 0; i < ifbac.ifbac_len / sizeof(*ifba); i++) {
 196                 ifba = ifbac.ifbac_req + i;
 197                 memcpy(ea.octet, ifba->ifba_dst,
 198                     sizeof(ea.octet));
 199                 printf("%s%s %s %lu ", prefix, ether_ntoa(&ea),
 200                     ifba->ifba_ifsname, ifba->ifba_expire);
 201                 printb("flags", ifba->ifba_flags, IFBAFBITS);
 202                 printf("\n");
 203         }
 204
 205         free(inbuf);
 206 }
 207
 208 static void
 209 bridge_status(int s)
 210 {
 211         struct ifbrparam param;
 212         u_int16_t pri;
 213         u_int8_t ht, fd, ma;
 214
 215         if (do_cmd(s, BRDGGPRI, &param, sizeof(param), 0) < 0)
 216                 return;
 217         pri = param.ifbrp_prio;
 218
 219         if (do_cmd(s, BRDGGHT, &param, sizeof(param), 0) < 0)
 220                 return;
 221         ht = param.ifbrp_hellotime;
 222
 223         if (do_cmd(s, BRDGGFD, &param, sizeof(param), 0) < 0)
 224                 return;
 225         fd = param.ifbrp_fwddelay;
 226
 227         if (do_cmd(s, BRDGGMA, &param, sizeof(param), 0) < 0)
 228                 return;
 229         ma = param.ifbrp_maxage;
 230
 231         printf("\tpriority %u hellotime %u fwddelay %u maxage %u\n",
 232             pri, ht, fd, ma);
 233
 234         bridge_interfaces(s, "\tmember: ");
 235
 236         return;
 237
 238 }
 239
 240 static void
 241 setbridge_add(const char *val, int d, int s, const struct afswtch *afp)
 242 {
 243         struct ifbreq req;
 244
 245         memset(&req, 0, sizeof(req));
 246         strlcpy(req.ifbr_ifsname, val, sizeof(req.ifbr_ifsname));
 247         if (do_cmd(s, BRDGADD, &req, sizeof(req), 1) < 0)
 248                 err(1, "BRDGADD %s",  val);
 249 }
 250
 251 static void
 252 setbridge_delete(const char *val, int d, int s, const struct afswtch *afp)
 253 {
 254         struct ifbreq req;
 255
 256         memset(&req, 0, sizeof(req));
 257         strlcpy(req.ifbr_ifsname, val, sizeof(req.ifbr_ifsname));
 258         if (do_cmd(s, BRDGDEL, &req, sizeof(req), 1) < 0)
 259                 err(1, "BRDGDEL %s",  val);
 260 }
 261
 262 static void
 263 setbridge_discover(const char *val, int d, int s, const struct afswtch *afp)
 264 {
 265
 266         do_bridgeflag(s, val, IFBIF_DISCOVER, 1);
 267 }
 268
 269 static void
 270 unsetbridge_discover(const char *val, int d, int s, const struct afswtch *afp)
 271 {
 272
 273         do_bridgeflag(s, val, IFBIF_DISCOVER, 0);
 274 }
 275
 276 static void
 277 setbridge_learn(const char *val, int d, int s, const struct afswtch *afp)
 278 {
 279
 280         do_bridgeflag(s, val, IFBIF_LEARNING,  1);
 281 }
 282
 283 static void
 284 unsetbridge_learn(const char *val, int d, int s, const struct afswtch *afp)
 285 {
 286
 287         do_bridgeflag(s, val, IFBIF_LEARNING,  0);
 288 }
 289
 290 static void
 291 setbridge_span(const char *val, int d, int s, const struct afswtch *afp)
 292 {
 293         struct ifbreq req;
 294
 295         memset(&req, 0, sizeof(req));
 296         strlcpy(req.ifbr_ifsname, val, sizeof(req.ifbr_ifsname));
 297         if (do_cmd(s, BRDGADDS, &req, sizeof(req), 1) < 0)
 298                 err(1, "BRDGADDS %s",  val);
 299 }
 300
 301 static void
 302 unsetbridge_span(const char *val, int d, int s, const struct afswtch *afp)
 303 {
 304         struct ifbreq req;
 305
 306         memset(&req, 0, sizeof(req));
 307         strlcpy(req.ifbr_ifsname, val, sizeof(req.ifbr_ifsname));
 308         if (do_cmd(s, BRDGDELS, &req, sizeof(req), 1) < 0)
 309                 err(1, "BRDGDELS %s",  val);
 310 }
 311
 312 static void
 313 setbridge_stp(const char *val, int d, int s, const struct afswtch *afp)
 314 {
 315
 316         do_bridgeflag(s, val, IFBIF_STP, 1);
 317 }
 318
 319 static void
 320 unsetbridge_stp(const char *val, int d, int s, const struct afswtch *afp)
 321 {
 322
 323         do_bridgeflag(s, val, IFBIF_STP, 0);
 324 }
 325
 326 static void
 327 setbridge_flush(const char *val, int d, int s, const struct afswtch *afp)
 328 {
 329         struct ifbreq req;
 330
 331         memset(&req, 0, sizeof(req));
 332         req.ifbr_ifsflags = IFBF_FLUSHDYN;
 333         if (do_cmd(s, BRDGFLUSH, &req, sizeof(req), 1) < 0)
 334                 err(1, "BRDGFLUSH");
 335 }
 336
 337 static void
 338 setbridge_flushall(const char *val, int d, int s, const struct afswtch *afp)
 339 {
 340         struct ifbreq req;
 341
 342         memset(&req, 0, sizeof(req));
 343         req.ifbr_ifsflags = IFBF_FLUSHALL;
 344         if (do_cmd(s, BRDGFLUSH, &req, sizeof(req), 1) < 0)
 345                 err(1, "BRDGFLUSH");
 346 }
 347
 348 static void
 349 setbridge_static(const char *val, const char *mac, int s,
 350     const struct afswtch *afp)
 351 {
 352         struct ifbareq req;
 353         struct ether_addr *ea;
 354
 355         memset(&req, 0, sizeof(req));
 356         strlcpy(req.ifba_ifsname, val, sizeof(req.ifba_ifsname));
 357
 358         ea = ether_aton(mac);
 359         if (ea == NULL)
 360                 errx(1, "%s: invalid address: %s", val, mac);
 361
 362         memcpy(req.ifba_dst, ea->octet, sizeof(req.ifba_dst));
 363         req.ifba_flags = IFBAF_STATIC;
 364
 365         if (do_cmd(s, BRDGSADDR, &req, sizeof(req), 1) < 0)
 366                 err(1, "BRDGSADDR %s",  val);
 367 }
 368
 369 static void
 370 setbridge_deladdr(const char *val, int d, int s, const struct afswtch *afp)
 371 {
 372         struct ifbareq req;
 373         struct ether_addr *ea;
 374
 375         memset(&req, 0, sizeof(req));
 376
 377         ea = ether_aton(val);
 378         if (ea == NULL)
 379                 errx(1, "invalid address: %s",  val);
 380
 381         memcpy(req.ifba_dst, ea->octet, sizeof(req.ifba_dst));
 382
 383         if (do_cmd(s, BRDGDADDR, &req, sizeof(req), 1) < 0)
 384                 err(1, "BRDGDADDR %s",  val);
 385 }
 386
 387 static void
 388 getbridge_addr(const char *val, int d, int s, const struct afswtch *afp)
 389 {
 390         bridge_addresses(s, "");
 391 }
 392
 393 static void
 394 setbridge_maxaddr(const char *arg, int d, int s, const struct afswtch *afp)
 395 {
 396         struct ifbrparam param;
 397         u_long val;
 398
 399         if (get_val(arg, &val) < 0 || (val & ~0xffffffff) != 0)
 400                 errx(1, "invalid value: %s",  arg);
 401
 402         param.ifbrp_csize = val & 0xffffffff;
 403
 404         if (do_cmd(s, BRDGSCACHE, &param, sizeof(param), 1) < 0)
 405                 err(1, "BRDGSCACHE %s",  arg);
 406 }
 407
 408 static void
 409 setbridge_hellotime(const char *arg, int d, int s, const struct afswtch *afp)
 410 {
 411         struct ifbrparam param;
 412         u_long val;
 413
 414         if (get_val(arg, &val) < 0 || (val & ~0xff) != 0)
 415                 errx(1, "invalid value: %s",  arg);
 416
 417         param.ifbrp_hellotime = val & 0xff;
 418
 419         if (do_cmd(s, BRDGSHT, &param, sizeof(param), 1) < 0)
 420                 err(1, "BRDGSHT %s",  arg);
 421 }
 422
 423 static void
 424 setbridge_fwddelay(const char *arg, int d, int s, const struct afswtch *afp)
 425 {
 426         struct ifbrparam param;
 427         u_long val;
 428
 429         if (get_val(arg, &val) < 0 || (val & ~0xff) != 0)
 430                 errx(1, "invalid value: %s",  arg);
 431
 432         param.ifbrp_fwddelay = val & 0xff;
 433
 434         if (do_cmd(s, BRDGSFD, &param, sizeof(param), 1) < 0)
 435                 err(1, "BRDGSFD %s",  arg);
 436 }
 437
 438 static void
 439 setbridge_maxage(const char *arg, int d, int s, const struct afswtch *afp)
 440 {
 441         struct ifbrparam param;
 442         u_long val;
 443
 444         if (get_val(arg, &val) < 0 || (val & ~0xff) != 0)
 445                 errx(1, "invalid value: %s",  arg);
 446
 447         param.ifbrp_maxage = val & 0xff;
 448
 449         if (do_cmd(s, BRDGSMA, &param, sizeof(param), 1) < 0)
 450                 err(1, "BRDGSMA %s",  arg);
 451 }
 452
 453 static void
 454 setbridge_priority(const char *arg, int d, int s, const struct afswtch *afp)
 455 {
 456         struct ifbrparam param;
 457         u_long val;
 458
 459         if (get_val(arg, &val) < 0 || (val & ~0xffff) != 0)
 460                 errx(1, "invalid value: %s",  arg);
 461
 462         param.ifbrp_prio = val & 0xffff;
 463
 464         if (do_cmd(s, BRDGSPRI, &param, sizeof(param), 1) < 0)
 465                 err(1, "BRDGSPRI %s",  arg);
 466 }
 467
 468 static void
 469 setbridge_ifpriority(const char *ifn, const char *pri, 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(pri, &val) < 0 || (val & ~0xff) != 0)
 478                 errx(1, "invalid value: %s",  pri);
 479
 480         strlcpy(req.ifbr_ifsname, ifn, sizeof(req.ifbr_ifsname));
 481         req.ifbr_priority = val & 0xff;
 482
 483         if (do_cmd(s, BRDGSIFPRIO, &req, sizeof(req), 1) < 0)
 484                 err(1, "BRDGSIFPRIO %s",  pri);
 485 }
 486
 487 static void
 488 setbridge_ifpathcost(const char *ifn, const char *cost, 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(cost, &val) < 0 || (val & ~0xff) != 0)
 497                 errx(1, "invalid value: %s",  cost);
 498
 499         strlcpy(req.ifbr_ifsname, ifn, sizeof(req.ifbr_ifsname));
 500         req.ifbr_path_cost = val & 0xffff;
 501
 502         if (do_cmd(s, BRDGSIFCOST, &req, sizeof(req), 1) < 0)
 503                 err(1, "BRDGSIFCOST %s",  cost);
 504 }
 505
 506 static void
 507 setbridge_timeout(const char *arg, int d, int s, const struct afswtch *afp)
 508 {
 509         struct ifbrparam param;
 510         u_long val;
 511
 512         if (get_val(arg, &val) < 0 || (val & ~0xffffffff) != 0)
 513                 errx(1, "invalid value: %s",  arg);
 514
 515         param.ifbrp_ctime = val & 0xffffffff;
 516
 517         if (do_cmd(s, BRDGSTO, &param, sizeof(param), 1) < 0)
 518                 err(1, "BRDGSTO %s",  arg);
 519 }
 520
 521 static struct cmd bridge_cmds[] = {
 522         DEF_CMD_ARG("addm",             setbridge_add),
 523         DEF_CMD_ARG("deletem",          setbridge_delete),
 524         DEF_CMD_ARG("discover",         setbridge_discover),
 525         DEF_CMD_ARG("-discover",        unsetbridge_discover),
 526         DEF_CMD_ARG("learn",            setbridge_learn),
 527         DEF_CMD_ARG("-learn",           unsetbridge_learn),
 528         DEF_CMD_ARG("span",             setbridge_span),
 529         DEF_CMD_ARG("-span",            unsetbridge_span),
 530         DEF_CMD_ARG("stp",              setbridge_stp),
 531         DEF_CMD_ARG("-stp",             unsetbridge_stp),
 532         DEF_CMD("flush", 0,             setbridge_flush),
 533         DEF_CMD("flushall", 0,          setbridge_flushall),
 534         DEF_CMD_ARG2("static",          setbridge_static),
 535         DEF_CMD_ARG("deladdr",          setbridge_deladdr),
 536         DEF_CMD("addr",  1,             getbridge_addr),
 537         DEF_CMD_ARG("maxaddr",          setbridge_maxaddr),
 538         DEF_CMD_ARG("hellotime",        setbridge_hellotime),
 539         DEF_CMD_ARG("fwddelay",         setbridge_fwddelay),
 540         DEF_CMD_ARG("maxage",           setbridge_maxage),
 541         DEF_CMD_ARG("priority",         setbridge_priority),
 542         DEF_CMD_ARG2("ifpriority",      setbridge_ifpriority),
 543         DEF_CMD_ARG2("ifpathcost",      setbridge_ifpathcost),
 544         DEF_CMD_ARG("timeout",          setbridge_timeout),
 545 };
 546 static struct afswtch af_bridge = {
 547         .af_name        = "af_bridge",
 548         .af_af          = AF_UNSPEC,
 549         .af_other_status = bridge_status,
 550 };
 551
 552 static __constructor void
 553 bridge_ctor(void)
 554 {
 555 #define N(a)    (sizeof(a) / sizeof(a[0]))
 556         int i;
 557
 558         for (i = 0; i < N(bridge_cmds);  i++)
 559                 cmd_register(&bridge_cmds[i]);
 560         af_register(&af_bridge);
 561 #undef N
 562 }