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
  17 #include "utils.h"
  18 #include "ip_common.h"
  19
  20 static void explain(void)
  21 {
  22         fprintf(stderr,
  23                 "Usage: ... bridge [ forward_delay FORWARD_DELAY ]\n"
  24                 "                  [ hello_time HELLO_TIME ]\n"
  25                 "                  [ max_age MAX_AGE ]\n"
  26                 "                  [ ageing_time AGEING_TIME ]\n"
  27                 "                  [ stp_state STP_STATE ]\n"
  28                 "                  [ priority PRIORITY ]\n"
  29         );
  30 }
  31
  32 static int bridge_parse_opt(struct link_util *lu, int argc, char **argv,
  33                             struct nlmsghdr *n)
  34 {
  35         __u32 val;
  36
  37         while (argc > 0) {
  38                 if (matches(*argv, "forward_delay") == 0) {
  39                         NEXT_ARG();
  40                         if (get_u32(&val, *argv, 0)) {
  41                                 invarg("invalid forward_delay", *argv);
  42                                 return -1;
  43                         }
  44                         addattr32(n, 1024, IFLA_BR_FORWARD_DELAY, val);
  45                 } else if (matches(*argv, "hello_time") == 0) {
  46                         NEXT_ARG();
  47                         if (get_u32(&val, *argv, 0)) {
  48                                 invarg("invalid hello_time", *argv);
  49                                 return -1;
  50                         }
  51                         addattr32(n, 1024, IFLA_BR_HELLO_TIME, val);
  52                 } else if (matches(*argv, "max_age") == 0) {
  53                         NEXT_ARG();
  54                         if (get_u32(&val, *argv, 0)) {
  55                                 invarg("invalid max_age", *argv);
  56                                 return -1;
  57                         }
  58                         addattr32(n, 1024, IFLA_BR_MAX_AGE, val);
  59                 } else if (matches(*argv, "ageing_time") == 0) {
  60                         NEXT_ARG();
  61                         if (get_u32(&val, *argv, 0)) {
  62                                 invarg("invalid ageing_time", *argv);
  63                                 return -1;
  64                         }
  65                         addattr32(n, 1024, IFLA_BR_AGEING_TIME, val);
  66                 } else if (matches(*argv, "stp_state") == 0) {
  67                         NEXT_ARG();
  68                         if (get_u32(&val, *argv, 0)) {
  69                                 invarg("invalid stp_state", *argv);
  70                                 return -1;
  71                         }
  72                         addattr32(n, 1024, IFLA_BR_STP_STATE, val);
  73                 } else if (matches(*argv, "priority") == 0) {
  74                         __u16 prio;
  75
  76                         NEXT_ARG();
  77                         if (get_u16(&prio, *argv, 0)) {
  78                                 invarg("invalid priority", *argv);
  79                                 return -1;
  80                         }
  81                         addattr16(n, 1024, IFLA_BR_PRIORITY, prio);
  82                 } else if (matches(*argv, "help") == 0) {
  83                         explain();
  84                         return -1;
  85                 } else {
  86                         fprintf(stderr, "bridge: unknown command \"%s\"?\n", *argv);
  87                         explain();
  88                         return -1;
  89                 }
  90                 argc--, argv++;
  91         }
  92
  93         return 0;
  94 }
  95
  96 static void bridge_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[])
  97 {
  98         if (!tb)
  99                 return;
 100
 101         if (tb[IFLA_BR_FORWARD_DELAY])
 102                 fprintf(f, "forward_delay %u ",
 103                         rta_getattr_u32(tb[IFLA_BR_FORWARD_DELAY]));
 104
 105         if (tb[IFLA_BR_HELLO_TIME])
 106                 fprintf(f, "hello_time %u ",
 107                         rta_getattr_u32(tb[IFLA_BR_HELLO_TIME]));
 108
 109         if (tb[IFLA_BR_MAX_AGE])
 110                 fprintf(f, "max_age %u ",
 111                         rta_getattr_u32(tb[IFLA_BR_MAX_AGE]));
 112 }
 113
 114 struct link_util bridge_link_util = {
 115         .id             = "bridge",
 116         .maxattr        = IFLA_BR_MAX,
 117         .parse_opt      = bridge_parse_opt,
 118         .print_opt      = bridge_print_opt,
 119 };