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 print_explain(FILE *f)
  21 {
  22         fprintf(f,
  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 void explain(void)
  33 {
  34         print_explain(stderr);
  35 }
  36
  37 static int bridge_parse_opt(struct link_util *lu, int argc, char **argv,
  38                             struct nlmsghdr *n)
  39 {
  40         __u32 val;
  41
  42         while (argc > 0) {
  43                 if (matches(*argv, "forward_delay") == 0) {
  44                         NEXT_ARG();
  45                         if (get_u32(&val, *argv, 0)) {
  46                                 invarg("invalid forward_delay", *argv);
  47                                 return -1;
  48                         }
  49                         addattr32(n, 1024, IFLA_BR_FORWARD_DELAY, val);
  50                 } else if (matches(*argv, "hello_time") == 0) {
  51                         NEXT_ARG();
  52                         if (get_u32(&val, *argv, 0)) {
  53                                 invarg("invalid hello_time", *argv);
  54                                 return -1;
  55                         }
  56                         addattr32(n, 1024, IFLA_BR_HELLO_TIME, val);
  57                 } else if (matches(*argv, "max_age") == 0) {
  58                         NEXT_ARG();
  59                         if (get_u32(&val, *argv, 0)) {
  60                                 invarg("invalid max_age", *argv);
  61                                 return -1;
  62                         }
  63                         addattr32(n, 1024, IFLA_BR_MAX_AGE, val);
  64                 } else if (matches(*argv, "ageing_time") == 0) {
  65                         NEXT_ARG();
  66                         if (get_u32(&val, *argv, 0)) {
  67                                 invarg("invalid ageing_time", *argv);
  68                                 return -1;
  69                         }
  70                         addattr32(n, 1024, IFLA_BR_AGEING_TIME, val);
  71                 } else if (matches(*argv, "stp_state") == 0) {
  72                         NEXT_ARG();
  73                         if (get_u32(&val, *argv, 0)) {
  74                                 invarg("invalid stp_state", *argv);
  75                                 return -1;
  76                         }
  77                         addattr32(n, 1024, IFLA_BR_STP_STATE, val);
  78                 } else if (matches(*argv, "priority") == 0) {
  79                         __u16 prio;
  80
  81                         NEXT_ARG();
  82                         if (get_u16(&prio, *argv, 0)) {
  83                                 invarg("invalid priority", *argv);
  84                                 return -1;
  85                         }
  86                         addattr16(n, 1024, IFLA_BR_PRIORITY, prio);
  87                 } else if (matches(*argv, "help") == 0) {
  88                         explain();
  89                         return -1;
  90                 } else {
  91                         fprintf(stderr, "bridge: unknown command \"%s\"?\n", *argv);
  92                         explain();
  93                         return -1;
  94                 }
  95                 argc--, argv++;
  96         }
  97
  98         return 0;
  99 }
 100
 101 static void bridge_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[])
 102 {
 103         if (!tb)
 104                 return;
 105
 106         if (tb[IFLA_BR_FORWARD_DELAY])
 107                 fprintf(f, "forward_delay %u ",
 108                         rta_getattr_u32(tb[IFLA_BR_FORWARD_DELAY]));
 109
 110         if (tb[IFLA_BR_HELLO_TIME])
 111                 fprintf(f, "hello_time %u ",
 112                         rta_getattr_u32(tb[IFLA_BR_HELLO_TIME]));
 113
 114         if (tb[IFLA_BR_MAX_AGE])
 115                 fprintf(f, "max_age %u ",
 116                         rta_getattr_u32(tb[IFLA_BR_MAX_AGE]));
 117 }
 118
 119 static void bridge_print_help(struct link_util *lu, int argc, char **argv,
 120                 FILE *f)
 121 {
 122         print_explain(f);
 123 }
 124
 125 struct link_util bridge_link_util = {
 126         .id             = "bridge",
 127         .maxattr        = IFLA_BR_MAX,
 128         .parse_opt      = bridge_parse_opt,
 129         .print_opt      = bridge_print_opt,
 130         .print_help     = bridge_print_help,
 131 };