ip/iplink_bridge.c

   1 /*
   2  * iplink_bridge.c      Bridge device support
   3  *
   4  *              This program is free software; you can redistribute it and/or
   5  *              modify it under the terms of the GNU General Public License
   6  *              as published by the Free Software Foundation; either version
   7  *              2 of the License, or (at your option) any later version.
   8  *
   9  * Authors:     Jiri Pirko <jiri@resnulli.us>
  10  */
  11
  12 #include <stdio.h>
  13 #include <stdlib.h>
  14 #include <string.h>
  15 #include <linux/if_link.h>
  16 #include <netinet/ether.h>
  17
  18 #include "rt_names.h"
  19 #include "utils.h"
  20 #include "ip_common.h"
  21
  22 static void print_explain(FILE *f)
  23 {
  24         fprintf(f,
  25                 "Usage: ... bridge [ forward_delay FORWARD_DELAY ]\n"
  26                 "                  [ hello_time HELLO_TIME ]\n"
  27                 "                  [ max_age MAX_AGE ]\n"
  28                 "                  [ ageing_time AGEING_TIME ]\n"
  29                 "                  [ stp_state STP_STATE ]\n"
  30                 "                  [ priority PRIORITY ]\n"
  31                 "                  [ group_fwd_mask MASK ]\n"
  32                 "                  [ group_address ADDRESS ]\n"
  33                 "                  [ vlan_filtering VLAN_FILTERING ]\n"
  34                 "                  [ vlan_protocol VLAN_PROTOCOL ]\n"
  35                 "                  [ vlan_default_pvid VLAN_DEFAULT_PVID ]\n"
  36                 "                  [ mcast_snooping MULTICAST_SNOOPING ]\n"
  37                 "                  [ mcast_router MULTICAST_ROUTER ]\n"
  38                 "                  [ mcast_query_use_ifaddr MCAST_QUERY_USE_IFADDR ]\n"
  39                 "                  [ mcast_querier MULTICAST_QUERIER ]\n"
  40                 "                  [ mcast_hash_elasticity HASH_ELASTICITY ]\n"
  41                 "                  [ mcast_hash_max HASH_MAX ]\n"
  42                 "                  [ mcast_last_member_count LAST_MEMBER_COUNT ]\n"
  43                 "                  [ mcast_startup_query_count STARTUP_QUERY_COUNT ]\n"
  44                 "                  [ mcast_last_member_interval LAST_MEMBER_INTERVAL ]\n"
  45                 "                  [ mcast_membership_interval MEMBERSHIP_INTERVAL ]\n"
  46                 "                  [ mcast_querier_interval QUERIER_INTERVAL ]\n"
  47                 "\n"
  48                 "Where: VLAN_PROTOCOL := { 802.1Q | 802.1ad }\n"
  49         );
  50 }
  51
  52 static void explain(void)
  53 {
  54         print_explain(stderr);
  55 }
  56
  57 static void br_dump_bridge_id(const struct ifla_bridge_id *id, char *buf,
  58                               size_t len)
  59 {
  60         char eaddr[32];
  61
  62         ether_ntoa_r((const struct ether_addr *)id->addr, eaddr);
  63         snprintf(buf, len, "%.2x%.2x.%s", id->prio[0], id->prio[1], eaddr);
  64 }
  65
  66 static int bridge_parse_opt(struct link_util *lu, int argc, char **argv,
  67                             struct nlmsghdr *n)
  68 {
  69         __u32 val;
  70
  71         while (argc > 0) {
  72                 if (matches(*argv, "forward_delay") == 0) {
  73                         NEXT_ARG();
  74                         if (get_u32(&val, *argv, 0))
  75                                 invarg("invalid forward_delay", *argv);
  76
  77                         addattr32(n, 1024, IFLA_BR_FORWARD_DELAY, val);
  78                 } else if (matches(*argv, "hello_time") == 0) {
  79                         NEXT_ARG();
  80                         if (get_u32(&val, *argv, 0))
  81                                 invarg("invalid hello_time", *argv);
  82
  83                         addattr32(n, 1024, IFLA_BR_HELLO_TIME, val);
  84                 } else if (matches(*argv, "max_age") == 0) {
  85                         NEXT_ARG();
  86                         if (get_u32(&val, *argv, 0))
  87                                 invarg("invalid max_age", *argv);
  88
  89                         addattr32(n, 1024, IFLA_BR_MAX_AGE, val);
  90                 } else if (matches(*argv, "ageing_time") == 0) {
  91                         NEXT_ARG();
  92                         if (get_u32(&val, *argv, 0))
  93                                 invarg("invalid ageing_time", *argv);
  94
  95                         addattr32(n, 1024, IFLA_BR_AGEING_TIME, val);
  96                 } else if (matches(*argv, "stp_state") == 0) {
  97                         NEXT_ARG();
  98                         if (get_u32(&val, *argv, 0))
  99                                 invarg("invalid stp_state", *argv);
 100
 101                         addattr32(n, 1024, IFLA_BR_STP_STATE, val);
 102                 } else if (matches(*argv, "priority") == 0) {
 103                         __u16 prio;
 104
 105                         NEXT_ARG();
 106                         if (get_u16(&prio, *argv, 0))
 107                                 invarg("invalid priority", *argv);
 108
 109                         addattr16(n, 1024, IFLA_BR_PRIORITY, prio);
 110                 } else if (matches(*argv, "vlan_filtering") == 0) {
 111                         __u8 vlan_filter;
 112
 113                         NEXT_ARG();
 114                         if (get_u8(&vlan_filter, *argv, 0)) {
 115                                 invarg("invalid vlan_filtering", *argv);
 116                                 return -1;
 117                         }
 118                         addattr8(n, 1024, IFLA_BR_VLAN_FILTERING, vlan_filter);
 119                 } else if (matches(*argv, "vlan_protocol") == 0) {
 120                         __u16 vlan_proto;
 121
 122                         NEXT_ARG();
 123                         if (ll_proto_a2n(&vlan_proto, *argv)) {
 124                                 invarg("invalid vlan_protocol", *argv);
 125                                 return -1;
 126                         }
 127                         addattr16(n, 1024, IFLA_BR_VLAN_PROTOCOL, vlan_proto);
 128                 } else if (matches(*argv, "group_fwd_mask") == 0) {
 129                         __u16 fwd_mask;
 130
 131                         NEXT_ARG();
 132                         if (get_u16(&fwd_mask, *argv, 0))
 133                                 invarg("invalid group_fwd_mask", *argv);
 134
 135                         addattr16(n, 1024, IFLA_BR_GROUP_FWD_MASK, fwd_mask);
 136                 } else if (matches(*argv, "group_address") == 0) {
 137                         char llabuf[32];
 138                         int len;
 139
 140                         NEXT_ARG();
 141                         len = ll_addr_a2n(llabuf, sizeof(llabuf), *argv);
 142                         if (len < 0)
 143                                 return -1;
 144                         addattr_l(n, 1024, IFLA_BR_GROUP_ADDR, llabuf, len);
 145                 } else if (matches(*argv, "vlan_default_pvid") == 0) {
 146                         __u16 default_pvid;
 147
 148                         NEXT_ARG();
 149                         if (get_u16(&default_pvid, *argv, 0))
 150                                 invarg("invalid vlan_default_pvid", *argv);
 151
 152                         addattr16(n, 1024, IFLA_BR_VLAN_DEFAULT_PVID,
 153                                   default_pvid);
 154                 } else if (matches(*argv, "mcast_router") == 0) {
 155                         __u8 mcast_router;
 156
 157                         NEXT_ARG();
 158                         if (get_u8(&mcast_router, *argv, 0))
 159                                 invarg("invalid mcast_router", *argv);
 160
 161                         addattr8(n, 1024, IFLA_BR_MCAST_ROUTER, mcast_router);
 162                 } else if (matches(*argv, "mcast_snooping") == 0) {
 163                         __u8 mcast_snoop;
 164
 165                         NEXT_ARG();
 166                         if (get_u8(&mcast_snoop, *argv, 0))
 167                                 invarg("invalid mcast_snooping", *argv);
 168
 169                         addattr8(n, 1024, IFLA_BR_MCAST_SNOOPING, mcast_snoop);
 170                 } else if (matches(*argv, "mcast_query_use_ifaddr") == 0) {
 171                         __u8 mcast_qui;
 172
 173                         NEXT_ARG();
 174                         if (get_u8(&mcast_qui, *argv, 0))
 175                                 invarg("invalid mcast_query_use_ifaddr",
 176                                        *argv);
 177
 178                         addattr8(n, 1024, IFLA_BR_MCAST_QUERY_USE_IFADDR,
 179                                  mcast_qui);
 180                 } else if (matches(*argv, "mcast_querier") == 0) {
 181                         __u8 mcast_querier;
 182
 183                         NEXT_ARG();
 184                         if (get_u8(&mcast_querier, *argv, 0))
 185                                 invarg("invalid mcast_querier", *argv);
 186
 187                         addattr8(n, 1024, IFLA_BR_MCAST_QUERIER, mcast_querier);
 188                 } else if (matches(*argv, "mcast_hash_elasticity") == 0) {
 189                         __u32 mcast_hash_el;
 190
 191                         NEXT_ARG();
 192                         if (get_u32(&mcast_hash_el, *argv, 0))
 193                                 invarg("invalid mcast_hash_elasticity",
 194                                        *argv);
 195
 196                         addattr32(n, 1024, IFLA_BR_MCAST_HASH_ELASTICITY,
 197                                   mcast_hash_el);
 198                 } else if (matches(*argv, "mcast_hash_max") == 0) {
 199                         __u32 mcast_hash_max;
 200
 201                         NEXT_ARG();
 202                         if (get_u32(&mcast_hash_max, *argv, 0))
 203                                 invarg("invalid mcast_hash_max", *argv);
 204
 205                         addattr32(n, 1024, IFLA_BR_MCAST_HASH_MAX,
 206                                   mcast_hash_max);
 207                 } else if (matches(*argv, "mcast_last_member_count") == 0) {
 208                         __u32 mcast_lmc;
 209
 210                         NEXT_ARG();
 211                         if (get_u32(&mcast_lmc, *argv, 0))
 212                                 invarg("invalid mcast_last_member_count",
 213                                        *argv);
 214
 215                         addattr32(n, 1024, IFLA_BR_MCAST_LAST_MEMBER_CNT,
 216                                   mcast_lmc);
 217                 } else if (matches(*argv, "mcast_startup_query_count") == 0) {
 218                         __u32 mcast_sqc;
 219
 220                         NEXT_ARG();
 221                         if (get_u32(&mcast_sqc, *argv, 0))
 222                                 invarg("invalid mcast_startup_query_count",
 223                                        *argv);
 224
 225                         addattr32(n, 1024, IFLA_BR_MCAST_STARTUP_QUERY_CNT,
 226                                   mcast_sqc);
 227                 } else if (matches(*argv, "mcast_last_member_interval") == 0) {
 228                         __u64 mcast_last_member_intvl;
 229
 230                         NEXT_ARG();
 231                         if (get_u64(&mcast_last_member_intvl, *argv, 0))
 232                                 invarg("invalid mcast_last_member_interval",
 233                                        *argv);
 234
 235                         addattr64(n, 1024, IFLA_BR_MCAST_LAST_MEMBER_INTVL,
 236                                   mcast_last_member_intvl);
 237                 } else if (matches(*argv, "mcast_membership_interval") == 0) {
 238                         __u64 mcast_membership_intvl;
 239
 240                         NEXT_ARG();
 241                         if (get_u64(&mcast_membership_intvl, *argv, 0)) {
 242                                 invarg("invalid mcast_membership_interval",
 243                                        *argv);
 244                                 return -1;
 245                         }
 246                         addattr64(n, 1024, IFLA_BR_MCAST_MEMBERSHIP_INTVL,
 247                                   mcast_membership_intvl);
 248                 } else if (matches(*argv, "mcast_querier_interval") == 0) {
 249                         __u64 mcast_querier_intvl;
 250
 251                         NEXT_ARG();
 252                         if (get_u64(&mcast_querier_intvl, *argv, 0)) {
 253                                 invarg("invalid mcast_querier_interval",
 254                                        *argv);
 255                                 return -1;
 256                         }
 257                         addattr64(n, 1024, IFLA_BR_MCAST_QUERIER_INTVL,
 258                                   mcast_querier_intvl);
 259                 } else if (matches(*argv, "help") == 0) {
 260                         explain();
 261                         return -1;
 262                 } else {
 263                         fprintf(stderr, "bridge: unknown command \"%s\"?\n", *argv);
 264                         explain();
 265                         return -1;
 266                 }
 267                 argc--, argv++;
 268         }
 269
 270         return 0;
 271 }
 272
 273 static void bridge_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[])
 274 {
 275         if (!tb)
 276                 return;
 277
 278         if (tb[IFLA_BR_FORWARD_DELAY])
 279                 fprintf(f, "forward_delay %u ",
 280                         rta_getattr_u32(tb[IFLA_BR_FORWARD_DELAY]));
 281
 282         if (tb[IFLA_BR_HELLO_TIME])
 283                 fprintf(f, "hello_time %u ",
 284                         rta_getattr_u32(tb[IFLA_BR_HELLO_TIME]));
 285
 286         if (tb[IFLA_BR_MAX_AGE])
 287                 fprintf(f, "max_age %u ",
 288                         rta_getattr_u32(tb[IFLA_BR_MAX_AGE]));
 289
 290         if (tb[IFLA_BR_AGEING_TIME])
 291                 fprintf(f, "ageing_time %u ",
 292                         rta_getattr_u32(tb[IFLA_BR_AGEING_TIME]));
 293
 294         if (tb[IFLA_BR_STP_STATE])
 295                 fprintf(f, "stp_state %u ",
 296                         rta_getattr_u32(tb[IFLA_BR_STP_STATE]));
 297
 298         if (tb[IFLA_BR_PRIORITY])
 299                 fprintf(f, "priority %u ",
 300                         rta_getattr_u16(tb[IFLA_BR_PRIORITY]));
 301
 302         if (tb[IFLA_BR_VLAN_FILTERING])
 303                 fprintf(f, "vlan_filtering %u ",
 304                         rta_getattr_u8(tb[IFLA_BR_VLAN_FILTERING]));
 305
 306         if (tb[IFLA_BR_VLAN_PROTOCOL]) {
 307                 SPRINT_BUF(b1);
 308
 309                 fprintf(f, "vlan_protocol %s ",
 310                         ll_proto_n2a(rta_getattr_u16(tb[IFLA_BR_VLAN_PROTOCOL]),
 311                                      b1, sizeof(b1)));
 312         }
 313
 314         if (tb[IFLA_BR_BRIDGE_ID]) {
 315                 char bridge_id[32];
 316
 317                 br_dump_bridge_id(RTA_DATA(tb[IFLA_BR_BRIDGE_ID]), bridge_id,
 318                                   sizeof(bridge_id));
 319                 fprintf(f, "bridge_id %s ", bridge_id);
 320         }
 321
 322         if (tb[IFLA_BR_ROOT_ID]) {
 323                 char root_id[32];
 324
 325                 br_dump_bridge_id(RTA_DATA(tb[IFLA_BR_BRIDGE_ID]), root_id,
 326                                   sizeof(root_id));
 327                 fprintf(f, "designated_root %s ", root_id);
 328         }
 329
 330         if (tb[IFLA_BR_ROOT_PORT])
 331                 fprintf(f, "root_port %u ",
 332                         rta_getattr_u16(tb[IFLA_BR_ROOT_PORT]));
 333
 334         if (tb[IFLA_BR_ROOT_PATH_COST])
 335                 fprintf(f, "root_path_cost %u ",
 336                         rta_getattr_u32(tb[IFLA_BR_ROOT_PATH_COST]));
 337
 338         if (tb[IFLA_BR_TOPOLOGY_CHANGE])
 339                 fprintf(f, "topology_change %u ",
 340                         rta_getattr_u8(tb[IFLA_BR_TOPOLOGY_CHANGE]));
 341
 342         if (tb[IFLA_BR_TOPOLOGY_CHANGE_DETECTED])
 343                 fprintf(f, "topology_change_detected %u ",
 344                         rta_getattr_u8(tb[IFLA_BR_TOPOLOGY_CHANGE_DETECTED]));
 345
 346         if (tb[IFLA_BR_HELLO_TIMER]) {
 347                 struct timeval tv;
 348
 349                 __jiffies_to_tv(&tv, rta_getattr_u64(tb[IFLA_BR_HELLO_TIMER]));
 350                 fprintf(f, "hello_timer %4i.%.2i ", (int)tv.tv_sec,
 351                         (int)tv.tv_usec/10000);
 352         }
 353
 354         if (tb[IFLA_BR_TCN_TIMER]) {
 355                 struct timeval tv;
 356
 357                 __jiffies_to_tv(&tv, rta_getattr_u64(tb[IFLA_BR_TCN_TIMER]));
 358                 fprintf(f, "tcn_timer %4i.%.2i ", (int)tv.tv_sec,
 359                         (int)tv.tv_usec/10000);
 360         }
 361
 362         if (tb[IFLA_BR_TOPOLOGY_CHANGE_TIMER]) {
 363                 unsigned long jiffies;
 364                 struct timeval tv;
 365
 366                 jiffies = rta_getattr_u64(tb[IFLA_BR_TOPOLOGY_CHANGE_TIMER]);
 367                 __jiffies_to_tv(&tv, jiffies);
 368                 fprintf(f, "topology_change_timer %4i.%.2i ", (int)tv.tv_sec,
 369                         (int)tv.tv_usec/10000);
 370         }
 371
 372         if (tb[IFLA_BR_GC_TIMER]) {
 373                 struct timeval tv;
 374
 375                 __jiffies_to_tv(&tv, rta_getattr_u64(tb[IFLA_BR_GC_TIMER]));
 376                 fprintf(f, "gc_timer %4i.%.2i ", (int)tv.tv_sec,
 377                         (int)tv.tv_usec/10000);
 378         }
 379
 380         if (tb[IFLA_BR_VLAN_DEFAULT_PVID])
 381                 fprintf(f, "vlan_default_pvid %u ",
 382                         rta_getattr_u16(tb[IFLA_BR_VLAN_DEFAULT_PVID]));
 383
 384         if (tb[IFLA_BR_GROUP_FWD_MASK])
 385                 fprintf(f, "group_fwd_mask %#x ",
 386                         rta_getattr_u16(tb[IFLA_BR_GROUP_FWD_MASK]));
 387
 388         if (tb[IFLA_BR_GROUP_ADDR]) {
 389                 SPRINT_BUF(mac);
 390
 391                 fprintf(f, "group_address %s ",
 392                         ll_addr_n2a(RTA_DATA(tb[IFLA_BR_GROUP_ADDR]),
 393                                     RTA_PAYLOAD(tb[IFLA_BR_GROUP_ADDR]),
 394                                     1 /*ARPHDR_ETHER*/, mac, sizeof(mac)));
 395         }
 396
 397         if (tb[IFLA_BR_MCAST_SNOOPING])
 398                 fprintf(f, "mcast_snooping %u ",
 399                         rta_getattr_u8(tb[IFLA_BR_MCAST_SNOOPING]));
 400
 401         if (tb[IFLA_BR_MCAST_ROUTER])
 402                 fprintf(f, "mcast_router %u ",
 403                         rta_getattr_u8(tb[IFLA_BR_MCAST_ROUTER]));
 404
 405         if (tb[IFLA_BR_MCAST_QUERY_USE_IFADDR])
 406                 fprintf(f, "mcast_query_use_ifaddr %u ",
 407                         rta_getattr_u8(tb[IFLA_BR_MCAST_QUERY_USE_IFADDR]));
 408
 409         if (tb[IFLA_BR_MCAST_QUERIER])
 410                 fprintf(f, "mcast_querier %u ",
 411                         rta_getattr_u8(tb[IFLA_BR_MCAST_QUERIER]));
 412
 413         if (tb[IFLA_BR_MCAST_HASH_ELASTICITY])
 414                 fprintf(f, "mcast_hash_elasticity %u ",
 415                         rta_getattr_u32(tb[IFLA_BR_MCAST_HASH_ELASTICITY]));
 416
 417         if (tb[IFLA_BR_MCAST_HASH_MAX])
 418                 fprintf(f, "mcast_hash_max %u ",
 419                         rta_getattr_u32(tb[IFLA_BR_MCAST_HASH_MAX]));
 420
 421         if (tb[IFLA_BR_MCAST_LAST_MEMBER_CNT])
 422                 fprintf(f, "mcast_last_member_count %u ",
 423                         rta_getattr_u32(tb[IFLA_BR_MCAST_LAST_MEMBER_CNT]));
 424
 425         if (tb[IFLA_BR_MCAST_STARTUP_QUERY_CNT])
 426                 fprintf(f, "mcast_startup_query_count %u ",
 427                         rta_getattr_u32(tb[IFLA_BR_MCAST_STARTUP_QUERY_CNT]));
 428
 429         if (tb[IFLA_BR_MCAST_LAST_MEMBER_INTVL])
 430                 fprintf(f, "mcast_last_member_interval %llu ",
 431                         rta_getattr_u64(tb[IFLA_BR_MCAST_LAST_MEMBER_INTVL]));
 432
 433         if (tb[IFLA_BR_MCAST_MEMBERSHIP_INTVL])
 434                 fprintf(f, "mcast_membership_interval %llu ",
 435                         rta_getattr_u64(tb[IFLA_BR_MCAST_MEMBERSHIP_INTVL]));
 436
 437         if (tb[IFLA_BR_MCAST_QUERIER_INTVL])
 438                 fprintf(f, "mcast_querier_interval %llu ",
 439                         rta_getattr_u64(tb[IFLA_BR_MCAST_QUERIER_INTVL]));
 440 }
 441
 442 static void bridge_print_help(struct link_util *lu, int argc, char **argv,
 443                 FILE *f)
 444 {
 445         print_explain(f);
 446 }
 447
 448 struct link_util bridge_link_util = {
 449         .id             = "bridge",
 450         .maxattr        = IFLA_BR_MAX,
 451         .parse_opt      = bridge_parse_opt,
 452         .print_opt      = bridge_print_opt,
 453         .print_help     = bridge_print_help,
 454 };