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         );
  27 }
  28
  29 static int bridge_parse_opt(struct link_util *lu, int argc, char **argv,
  30                             struct nlmsghdr *n)
  31 {
  32         __u32 val;
  33
  34         while (argc > 0) {
  35                 if (matches(*argv, "forward_delay") == 0) {
  36                         NEXT_ARG();
  37                         if (get_u32(&val, *argv, 0)) {
  38                                 invarg("invalid forward_delay", *argv);
  39                                 return -1;
  40                         }
  41                         addattr32(n, 1024, IFLA_BR_FORWARD_DELAY, val);
  42                 } else if (matches(*argv, "hello_time") == 0) {
  43                         NEXT_ARG();
  44                         if (get_u32(&val, *argv, 0)) {
  45                                 invarg("invalid hello_time", *argv);
  46                                 return -1;
  47                         }
  48                         addattr32(n, 1024, IFLA_BR_HELLO_TIME, val);
  49                 } else if (matches(*argv, "max_age") == 0) {
  50                         NEXT_ARG();
  51                         if (get_u32(&val, *argv, 0)) {
  52                                 invarg("invalid max_age", *argv);
  53                                 return -1;
  54                         }
  55                         addattr32(n, 1024, IFLA_BR_MAX_AGE, val);
  56                 } else if (matches(*argv, "help") == 0) {
  57                         explain();
  58                         return -1;
  59                 } else {
  60                         fprintf(stderr, "bridge: unknown command \"%s\"?\n", *argv);
  61                         explain();
  62                         return -1;
  63                 }
  64                 argc--, argv++;
  65         }
  66
  67         return 0;
  68 }
  69
  70 static void bridge_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[])
  71 {
  72         if (!tb)
  73                 return;
  74
  75         if (tb[IFLA_BR_FORWARD_DELAY])
  76                 fprintf(f, "forward_delay %u ",
  77                         rta_getattr_u32(tb[IFLA_BR_FORWARD_DELAY]));
  78
  79         if (tb[IFLA_BR_HELLO_TIME])
  80                 fprintf(f, "hello_time %u ",
  81                         rta_getattr_u32(tb[IFLA_BR_HELLO_TIME]));
  82
  83         if (tb[IFLA_BR_MAX_AGE])
  84                 fprintf(f, "max_age %u ",
  85                         rta_getattr_u32(tb[IFLA_BR_MAX_AGE]));
  86 }
  87
  88 struct link_util bridge_link_util = {
  89         .id             = "bridge",
  90         .maxattr        = IFLA_BR_MAX,
  91         .parse_opt      = bridge_parse_opt,
  92         .print_opt      = bridge_print_opt,
  93 };