bridge/bridge.c

   1 /*
   2  * Get/set/delete bridge with netlink
   3  *
   4  * Authors:     Stephen Hemminger <shemminger@vyatta.com>
   5  */
   6
   7 #include <stdio.h>
   8 #include <stdlib.h>
   9 #include <unistd.h>
  10 #include <sys/socket.h>
  11 #include <string.h>
  12 #include <errno.h>
  13
  14 #include "SNAPSHOT.h"
  15 #include "utils.h"
  16 #include "br_common.h"
  17 #include "namespace.h"
  18
  19 struct rtnl_handle rth = { .fd = -1 };
  20 int preferred_family = AF_UNSPEC;
  21 int resolve_hosts;
  22 int oneline;
  23 int show_stats;
  24 int show_details;
  25 int compress_vlans;
  26 int timestamp;
  27 char *batch_file;
  28 int force;
  29 const char *_SL_;
  30
  31 static void usage(void) __attribute__((noreturn));
  32
  33 static void usage(void)
  34 {
  35         fprintf(stderr,
  36 "Usage: bridge [ OPTIONS ] OBJECT { COMMAND | help }\n"
  37 "       bridge [ -force ] -batch filename\n"
  38 "where  OBJECT := { link | fdb | mdb | vlan | monitor }\n"
  39 "       OPTIONS := { -V[ersion] | -s[tatistics] | -d[etails] |\n"
  40 "                    -o[neline] | -t[imestamp] | -n[etns] name |\n"
  41 "                    -c[ompressvlans] }\n");
  42         exit(-1);
  43 }
  44
  45 static int do_help(int argc, char **argv)
  46 {
  47         usage();
  48 }
  49
  50
  51 static const struct cmd {
  52         const char *cmd;
  53         int (*func)(int argc, char **argv);
  54 } cmds[] = {
  55         { "link",       do_link },
  56         { "fdb",        do_fdb },
  57         { "mdb",        do_mdb },
  58         { "vlan",       do_vlan },
  59         { "monitor",    do_monitor },
  60         { "help",       do_help },
  61         { 0 }
  62 };
  63
  64 static int do_cmd(const char *argv0, int argc, char **argv)
  65 {
  66         const struct cmd *c;
  67
  68         for (c = cmds; c->cmd; ++c) {
  69                 if (matches(argv0, c->cmd) == 0)
  70                         return c->func(argc-1, argv+1);
  71         }
  72
  73         fprintf(stderr,
  74                 "Object \"%s\" is unknown, try \"bridge help\".\n", argv0);
  75         return -1;
  76 }
  77
  78 static int batch(const char *name)
  79 {
  80         char *line = NULL;
  81         size_t len = 0;
  82         int ret = EXIT_SUCCESS;
  83
  84         if (name && strcmp(name, "-") != 0) {
  85                 if (freopen(name, "r", stdin) == NULL) {
  86                         fprintf(stderr,
  87                                 "Cannot open file \"%s\" for reading: %s\n",
  88                                 name, strerror(errno));
  89                         return EXIT_FAILURE;
  90                 }
  91         }
  92
  93         if (rtnl_open(&rth, 0) < 0) {
  94                 fprintf(stderr, "Cannot open rtnetlink\n");
  95                 return EXIT_FAILURE;
  96         }
  97
  98         cmdlineno = 0;
  99         while (getcmdline(&line, &len, stdin) != -1) {
 100                 char *largv[100];
 101                 int largc;
 102
 103                 largc = makeargs(line, largv, 100);
 104                 if (largc == 0)
 105                         continue;       /* blank line */
 106
 107                 if (do_cmd(largv[0], largc, largv)) {
 108                         fprintf(stderr, "Command failed %s:%d\n",
 109                                 name, cmdlineno);
 110                         ret = EXIT_FAILURE;
 111                         if (!force)
 112                                 break;
 113                 }
 114         }
 115         if (line)
 116                 free(line);
 117
 118         rtnl_close(&rth);
 119         return ret;
 120 }
 121
 122 int
 123 main(int argc, char **argv)
 124 {
 125         while (argc > 1) {
 126                 const char *opt = argv[1];
 127
 128                 if (strcmp(opt, "--") == 0) {
 129                         argc--; argv++;
 130                         break;
 131                 }
 132                 if (opt[0] != '-')
 133                         break;
 134                 if (opt[1] == '-')
 135                         opt++;
 136
 137                 if (matches(opt, "-help") == 0) {
 138                         usage();
 139                 } else if (matches(opt, "-Version") == 0) {
 140                         printf("bridge utility, 0.0\n");
 141                         exit(0);
 142                 } else if (matches(opt, "-stats") == 0 ||
 143                            matches(opt, "-statistics") == 0) {
 144                         ++show_stats;
 145                 } else if (matches(opt, "-details") == 0) {
 146                         ++show_details;
 147                 } else if (matches(opt, "-oneline") == 0) {
 148                         ++oneline;
 149                 } else if (matches(opt, "-timestamp") == 0) {
 150                         ++timestamp;
 151                 } else if (matches(opt, "-family") == 0) {
 152                         argc--;
 153                         argv++;
 154                         if (argc <= 1)
 155                                 usage();
 156                         if (strcmp(argv[1], "inet") == 0)
 157                                 preferred_family = AF_INET;
 158                         else if (strcmp(argv[1], "inet6") == 0)
 159                                 preferred_family = AF_INET6;
 160                         else if (strcmp(argv[1], "help") == 0)
 161                                 usage();
 162                         else
 163                                 invarg("invalid protocol family", argv[1]);
 164                 } else if (strcmp(opt, "-4") == 0) {
 165                         preferred_family = AF_INET;
 166                 } else if (strcmp(opt, "-6") == 0) {
 167                         preferred_family = AF_INET6;
 168                 } else if (matches(opt, "-netns") == 0) {
 169                         NEXT_ARG();
 170                         if (netns_switch(argv[1]))
 171                                 exit(-1);
 172                 } else if (matches(opt, "-compressvlans") == 0) {
 173                         ++compress_vlans;
 174                 } else if (matches(opt, "-force") == 0) {
 175                         ++force;
 176                 } else if (matches(opt, "-batch") == 0) {
 177                         argc--;
 178                         argv++;
 179                         if (argc <= 1)
 180                                 usage();
 181                         batch_file = argv[1];
 182                 } else {
 183                         fprintf(stderr,
 184                                 "Option \"%s\" is unknown, try \"bridge help\".\n",
 185                                 opt);
 186                         exit(-1);
 187                 }
 188                 argc--; argv++;
 189         }
 190
 191         _SL_ = oneline ? "\\" : "\n";
 192
 193         if (batch_file)
 194                 return batch(batch_file);
 195
 196         if (rtnl_open(&rth, 0) < 0)
 197                 exit(1);
 198
 199         if (argc > 1)
 200                 return do_cmd(argv[1], argc-1, argv+1);
 201
 202         rtnl_close(&rth);
 203         usage();
 204 }