bridge/bridge.c

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * Get/set/delete bridge with netlink
   4  *
   5  * Authors:     Stephen Hemminger <shemminger@vyatta.com>
   6  */
   7
   8 #include <stdio.h>
   9 #include <stdlib.h>
  10 #include <unistd.h>
  11 #include <sys/socket.h>
  12 #include <string.h>
  13 #include <errno.h>
  14
  15 #include "version.h"
  16 #include "utils.h"
  17 #include "br_common.h"
  18 #include "namespace.h"
  19 #include "color.h"
  20
  21 struct rtnl_handle rth = { .fd = -1 };
  22 int preferred_family = AF_UNSPEC;
  23 int oneline;
  24 int show_stats;
  25 int show_details;
  26 static int color;
  27 int compress_vlans;
  28 int json;
  29 int timestamp;
  30 static const char *batch_file;
  31 int force;
  32
  33 static void usage(void) __attribute__((noreturn));
  34
  35 static void usage(void)
  36 {
  37         fprintf(stderr,
  38 "Usage: bridge [ OPTIONS ] OBJECT { COMMAND | help }\n"
  39 "       bridge [ -force ] -batch filename\n"
  40 "where  OBJECT := { link | fdb | mdb | vlan | monitor }\n"
  41 "       OPTIONS := { -V[ersion] | -s[tatistics] | -d[etails] |\n"
  42 "                    -o[neline] | -t[imestamp] | -n[etns] name |\n"
  43 "                    -c[ompressvlans] -color -p[retty] -j[son] }\n");
  44         exit(-1);
  45 }
  46
  47 static int do_help(int argc, char **argv)
  48 {
  49         usage();
  50 }
  51
  52
  53 static const struct cmd {
  54         const char *cmd;
  55         int (*func)(int argc, char **argv);
  56 } cmds[] = {
  57         { "link",       do_link },
  58         { "fdb",        do_fdb },
  59         { "mdb",        do_mdb },
  60         { "vlan",       do_vlan },
  61         { "monitor",    do_monitor },
  62         { "help",       do_help },
  63         { 0 }
  64 };
  65
  66 static int do_cmd(const char *argv0, int argc, char **argv)
  67 {
  68         const struct cmd *c;
  69
  70         for (c = cmds; c->cmd; ++c) {
  71                 if (matches(argv0, c->cmd) == 0)
  72                         return c->func(argc-1, argv+1);
  73         }
  74
  75         fprintf(stderr,
  76                 "Object \"%s\" is unknown, try \"bridge help\".\n", argv0);
  77         return -1;
  78 }
  79
  80 static int br_batch_cmd(int argc, char *argv[], void *data)
  81 {
  82         return do_cmd(argv[0], argc, argv);
  83 }
  84
  85 static int batch(const char *name)
  86 {
  87         int ret;
  88
  89         if (rtnl_open(&rth, 0) < 0) {
  90                 fprintf(stderr, "Cannot open rtnetlink\n");
  91                 return EXIT_FAILURE;
  92         }
  93
  94         rtnl_set_strict_dump(&rth);
  95
  96         ret = do_batch(name, force, br_batch_cmd, NULL);
  97
  98         rtnl_close(&rth);
  99         return ret;
 100 }
 101
 102 int
 103 main(int argc, char **argv)
 104 {
 105         while (argc > 1) {
 106                 const char *opt = argv[1];
 107
 108                 if (strcmp(opt, "--") == 0) {
 109                         argc--; argv++;
 110                         break;
 111                 }
 112                 if (opt[0] != '-')
 113                         break;
 114                 if (opt[1] == '-')
 115                         opt++;
 116
 117                 if (matches(opt, "-help") == 0) {
 118                         usage();
 119                 } else if (matches(opt, "-Version") == 0) {
 120                         printf("bridge utility, %s\n", version);
 121                         exit(0);
 122                 } else if (matches(opt, "-stats") == 0 ||
 123                            matches(opt, "-statistics") == 0) {
 124                         ++show_stats;
 125                 } else if (matches(opt, "-details") == 0) {
 126                         ++show_details;
 127                 } else if (matches(opt, "-oneline") == 0) {
 128                         ++oneline;
 129                 } else if (matches(opt, "-timestamp") == 0) {
 130                         ++timestamp;
 131                 } else if (matches(opt, "-family") == 0) {
 132                         argc--;
 133                         argv++;
 134                         if (argc <= 1)
 135                                 usage();
 136                         if (strcmp(argv[1], "inet") == 0)
 137                                 preferred_family = AF_INET;
 138                         else if (strcmp(argv[1], "inet6") == 0)
 139                                 preferred_family = AF_INET6;
 140                         else if (strcmp(argv[1], "help") == 0)
 141                                 usage();
 142                         else
 143                                 invarg("invalid protocol family", argv[1]);
 144                 } else if (strcmp(opt, "-4") == 0) {
 145                         preferred_family = AF_INET;
 146                 } else if (strcmp(opt, "-6") == 0) {
 147                         preferred_family = AF_INET6;
 148                 } else if (matches(opt, "-netns") == 0) {
 149                         NEXT_ARG();
 150                         if (netns_switch(argv[1]))
 151                                 exit(-1);
 152                 } else if (matches(opt, "-compressvlans") == 0) {
 153                         ++compress_vlans;
 154                 } else if (matches_color(opt, &color)) {
 155                 } else if (matches(opt, "-force") == 0) {
 156                         ++force;
 157                 } else if (matches(opt, "-json") == 0) {
 158                         ++json;
 159                 } else if (matches(opt, "-pretty") == 0) {
 160                         ++pretty;
 161                 } else if (matches(opt, "-batch") == 0) {
 162                         argc--;
 163                         argv++;
 164                         if (argc <= 1)
 165                                 usage();
 166                         batch_file = argv[1];
 167                 } else {
 168                         fprintf(stderr,
 169                                 "Option \"%s\" is unknown, try \"bridge help\".\n",
 170                                 opt);
 171                         exit(-1);
 172                 }
 173                 argc--; argv++;
 174         }
 175
 176         _SL_ = oneline ? "\\" : "\n";
 177
 178         check_enable_color(color, json);
 179
 180         if (batch_file)
 181                 return batch(batch_file);
 182
 183         if (rtnl_open(&rth, 0) < 0)
 184                 exit(1);
 185
 186         rtnl_set_strict_dump(&rth);
 187
 188         if (argc > 1)
 189                 return do_cmd(argv[1], argc-1, argv+1);
 190
 191         rtnl_close(&rth);
 192         usage();
 193 }