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 "SNAPSHOT.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 int show_pretty;
  27 int color;
  28 int compress_vlans;
  29 int json;
  30 int timestamp;
  31 char *batch_file;
  32 int force;
  33
  34 static void usage(void) __attribute__((noreturn));
  35
  36 static void usage(void)
  37 {
  38         fprintf(stderr,
  39 "Usage: bridge [ OPTIONS ] OBJECT { COMMAND | help }\n"
  40 "       bridge [ -force ] -batch filename\n"
  41 "where  OBJECT := { link | fdb | mdb | vlan | monitor }\n"
  42 "       OPTIONS := { -V[ersion] | -s[tatistics] | -d[etails] |\n"
  43 "                    -o[neline] | -t[imestamp] | -n[etns] name |\n"
  44 "                    -c[ompressvlans] -color -p[retty] -j[son] }\n");
  45         exit(-1);
  46 }
  47
  48 static int do_help(int argc, char **argv)
  49 {
  50         usage();
  51 }
  52
  53
  54 static const struct cmd {
  55         const char *cmd;
  56         int (*func)(int argc, char **argv);
  57 } cmds[] = {
  58         { "link",       do_link },
  59         { "fdb",        do_fdb },
  60         { "mdb",        do_mdb },
  61         { "vlan",       do_vlan },
  62         { "monitor",    do_monitor },
  63         { "help",       do_help },
  64         { 0 }
  65 };
  66
  67 static int do_cmd(const char *argv0, int argc, char **argv)
  68 {
  69         const struct cmd *c;
  70
  71         for (c = cmds; c->cmd; ++c) {
  72                 if (matches(argv0, c->cmd) == 0)
  73                         return c->func(argc-1, argv+1);
  74         }
  75
  76         fprintf(stderr,
  77                 "Object \"%s\" is unknown, try \"bridge help\".\n", argv0);
  78         return -1;
  79 }
  80
  81 static int batch(const char *name)
  82 {
  83         char *line = NULL;
  84         size_t len = 0;
  85         int ret = EXIT_SUCCESS;
  86
  87         if (name && strcmp(name, "-") != 0) {
  88                 if (freopen(name, "r", stdin) == NULL) {
  89                         fprintf(stderr,
  90                                 "Cannot open file \"%s\" for reading: %s\n",
  91                                 name, strerror(errno));
  92                         return EXIT_FAILURE;
  93                 }
  94         }
  95
  96         if (rtnl_open(&rth, 0) < 0) {
  97                 fprintf(stderr, "Cannot open rtnetlink\n");
  98                 return EXIT_FAILURE;
  99         }
 100
 101         cmdlineno = 0;
 102         while (getcmdline(&line, &len, stdin) != -1) {
 103                 char *largv[100];
 104                 int largc;
 105
 106                 largc = makeargs(line, largv, 100);
 107                 if (largc == 0)
 108                         continue;       /* blank line */
 109
 110                 if (do_cmd(largv[0], largc, largv)) {
 111                         fprintf(stderr, "Command failed %s:%d\n",
 112                                 name, cmdlineno);
 113                         ret = EXIT_FAILURE;
 114                         if (!force)
 115                                 break;
 116                 }
 117         }
 118         if (line)
 119                 free(line);
 120
 121         rtnl_close(&rth);
 122         return ret;
 123 }
 124
 125 int
 126 main(int argc, char **argv)
 127 {
 128         while (argc > 1) {
 129                 const char *opt = argv[1];
 130
 131                 if (strcmp(opt, "--") == 0) {
 132                         argc--; argv++;
 133                         break;
 134                 }
 135                 if (opt[0] != '-')
 136                         break;
 137                 if (opt[1] == '-')
 138                         opt++;
 139
 140                 if (matches(opt, "-help") == 0) {
 141                         usage();
 142                 } else if (matches(opt, "-Version") == 0) {
 143                         printf("bridge utility, 0.0\n");
 144                         exit(0);
 145                 } else if (matches(opt, "-stats") == 0 ||
 146                            matches(opt, "-statistics") == 0) {
 147                         ++show_stats;
 148                 } else if (matches(opt, "-details") == 0) {
 149                         ++show_details;
 150                 } else if (matches(opt, "-oneline") == 0) {
 151                         ++oneline;
 152                 } else if (matches(opt, "-timestamp") == 0) {
 153                         ++timestamp;
 154                 } else if (matches(opt, "-family") == 0) {
 155                         argc--;
 156                         argv++;
 157                         if (argc <= 1)
 158                                 usage();
 159                         if (strcmp(argv[1], "inet") == 0)
 160                                 preferred_family = AF_INET;
 161                         else if (strcmp(argv[1], "inet6") == 0)
 162                                 preferred_family = AF_INET6;
 163                         else if (strcmp(argv[1], "help") == 0)
 164                                 usage();
 165                         else
 166                                 invarg("invalid protocol family", argv[1]);
 167                 } else if (strcmp(opt, "-4") == 0) {
 168                         preferred_family = AF_INET;
 169                 } else if (strcmp(opt, "-6") == 0) {
 170                         preferred_family = AF_INET6;
 171                 } else if (matches(opt, "-netns") == 0) {
 172                         NEXT_ARG();
 173                         if (netns_switch(argv[1]))
 174                                 exit(-1);
 175                 } else if (matches_color(opt, &color)) {
 176                 } else if (matches(opt, "-compressvlans") == 0) {
 177                         ++compress_vlans;
 178                 } else if (matches(opt, "-force") == 0) {
 179                         ++force;
 180                 } else if (matches(opt, "-json") == 0) {
 181                         ++json;
 182                 } else if (matches(opt, "-pretty") == 0) {
 183                         ++pretty;
 184                 } else if (matches(opt, "-batch") == 0) {
 185                         argc--;
 186                         argv++;
 187                         if (argc <= 1)
 188                                 usage();
 189                         batch_file = argv[1];
 190                 } else {
 191                         fprintf(stderr,
 192                                 "Option \"%s\" is unknown, try \"bridge help\".\n",
 193                                 opt);
 194                         exit(-1);
 195                 }
 196                 argc--; argv++;
 197         }
 198
 199         _SL_ = oneline ? "\\" : "\n";
 200
 201         check_enable_color(color, json);
 202
 203         if (batch_file)
 204                 return batch(batch_file);
 205
 206         if (rtnl_open(&rth, 0) < 0)
 207                 exit(1);
 208
 209         if (argc > 1)
 210                 return do_cmd(argv[1], argc-1, argv+1);
 211
 212         rtnl_close(&rth);
 213         usage();
 214 }