ip/ip.c

   1 /*
   2  * ip.c         "ip" utility frontend.
   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:     Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
  10  *
  11  *
  12  * Changes:
  13  *
  14  * Rani Assaf <rani@magic.metawire.com> 980929: resolve addresses
  15  */
  16
  17 #include <stdio.h>
  18 #include <stdlib.h>
  19 #include <unistd.h>
  20 #include <syslog.h>
  21 #include <fcntl.h>
  22 #include <sys/socket.h>
  23 #include <netinet/in.h>
  24 #include <string.h>
  25 #include <errno.h>
  26
  27 #include "SNAPSHOT.h"
  28 #include "utils.h"
  29 #include "ip_common.h"
  30
  31 int preferred_family = AF_UNSPEC;
  32 int show_stats = 0;
  33 int resolve_hosts = 0;
  34 int oneline = 0;
  35 int timestamp = 0;
  36 char * _SL_ = NULL;
  37 char *batch_file = NULL;
  38 int force = 0;
  39 struct rtnl_handle rth;
  40
  41 static void usage(void) __attribute__((noreturn));
  42
  43 static void usage(void)
  44 {
  45         fprintf(stderr,
  46 "Usage: ip [ OPTIONS ] OBJECT { COMMAND | help }\n"
  47 "       ip [ -force ] [-batch filename\n"
  48 "where  OBJECT := { link | addr | route | rule | neigh | tunnel |\n"
  49 "                   maddr | mroute | monitor | xfrm }\n"
  50 "       OPTIONS := { -V[ersion] | -s[tatistics] | -r[esolve] |\n"
  51 "                    -f[amily] { inet | inet6 | ipx | dnet | link } |\n"
  52 "                    -o[neline] | -t[imestamp] }\n");
  53         exit(-1);
  54 }
  55
  56 static const struct cmd {
  57         const char *cmd;
  58         int (*func)(int argc, char **argv);
  59 } cmds[] = {
  60         { "addr",       do_ipaddr },
  61         { "maddr",      do_multiaddr },
  62         { "route",      do_iproute },
  63         { "rule",       do_iprule },
  64         { "neigh",      do_ipneigh },
  65         { "link",       do_iplink },
  66         { "tunnel",     do_iptunnel },
  67         { "monitor",    do_ipmonitor },
  68         { "xfrm",       do_xfrm },
  69         { 0 }
  70 };
  71
  72 static int do_cmd(const char *argv0, int argc, char **argv)
  73 {
  74         const struct cmd *c;
  75
  76         for (c = cmds; c->cmd; ++c)
  77                 if (strcmp(c->cmd, argv0) == 0)
  78                         return c->func(argc-1, argv+1);
  79
  80         fprintf(stderr, "Object \"%s\" is unknown, try \"ip help\".\n", argv0);
  81         exit(-1);
  82 }
  83
  84 static int batch(const char *name)
  85 {
  86         char *line = NULL;
  87         size_t len = 0;
  88         int ret = 0;
  89         int lineno = 0;
  90
  91         if (name && strcmp(name, "-") != 0) {
  92                 if (freopen(name, "r", stdin) == NULL) {
  93                         fprintf(stderr, "Cannot open file \"%s\" for reading: %s=n",
  94                                 name, strerror(errno));
  95                         return -1;
  96                 }
  97         }
  98
  99         if (rtnl_open(&rth, 0) < 0) {
 100                 fprintf(stderr, "Cannot open rtnetlink\n");
 101                 return -1;
 102         }
 103
 104         while (getcmdline(&line, &len, stdin) != -1) {
 105                 char *largv[100];
 106                 int largc;
 107
 108                 largc = makeargs(line, largv, 100);
 109                 if (largc == 0)
 110                         continue;       /* blank line */
 111
 112                 if (do_cmd(largv[0], largc, largv)) {
 113                         fprintf(stderr, "Command failed %s:%d\n", name, lineno);
 114                         ret = 1;
 115                         if (!force)
 116                                 break;
 117                 }
 118         }
 119
 120         rtnl_close(&rth);
 121         return ret;
 122 }
 123
 124
 125 int main(int argc, char **argv)
 126 {
 127         char *basename;
 128
 129         basename = strrchr(argv[0], '/');
 130         if (basename == NULL)
 131                 basename = argv[0];
 132         else
 133                 basename++;
 134
 135         while (argc > 1) {
 136                 char *opt = argv[1];
 137                 if (strcmp(opt,"--") == 0) {
 138                         argc--; argv++;
 139                         break;
 140                 }
 141                 if (opt[0] != '-')
 142                         break;
 143                 if (opt[1] == '-')
 144                         opt++;
 145                 if (matches(opt, "-family") == 0) {
 146                         argc--;
 147                         argv++;
 148                         if (argc <= 1)
 149                                 usage();
 150                         if (strcmp(argv[1], "inet") == 0)
 151                                 preferred_family = AF_INET;
 152                         else if (strcmp(argv[1], "inet6") == 0)
 153                                 preferred_family = AF_INET6;
 154                         else if (strcmp(argv[1], "dnet") == 0)
 155                                 preferred_family = AF_DECnet;
 156                         else if (strcmp(argv[1], "link") == 0)
 157                                 preferred_family = AF_PACKET;
 158                         else if (strcmp(argv[1], "ipx") == 0)
 159                                 preferred_family = AF_IPX;
 160                         else if (strcmp(argv[1], "help") == 0)
 161                                 usage();
 162                         else
 163                                 invarg(argv[1], "invalid protocol family");
 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 (strcmp(opt, "-0") == 0) {
 169                         preferred_family = AF_PACKET;
 170                 } else if (strcmp(opt, "-I") == 0) {
 171                         preferred_family = AF_IPX;
 172                 } else if (strcmp(opt, "-D") == 0) {
 173                         preferred_family = AF_DECnet;
 174                 } else if (matches(opt, "-stats") == 0 ||
 175                            matches(opt, "-statistics") == 0) {
 176                         ++show_stats;
 177                 } else if (matches(opt, "-resolve") == 0) {
 178                         ++resolve_hosts;
 179                 } else if (matches(opt, "-oneline") == 0) {
 180                         ++oneline;
 181                 } else if (matches(opt, "-timestamp") == 0) {
 182                         ++timestamp;
 183 #if 0
 184                 } else if (matches(opt, "-numeric") == 0) {
 185                         rtnl_names_numeric++;
 186 #endif
 187                 } else if (matches(opt, "-Version") == 0) {
 188                         printf("ip utility, iproute2-ss%s\n", SNAPSHOT);
 189                         exit(0);
 190                 } else if (matches(opt, "-force") == 0) {
 191                         ++force;
 192                 } else if (matches(opt, "-batch") == 0) {
 193                         argc--;
 194                         argv++;
 195                         if (argc <= 1)
 196                                 usage();
 197                         batch_file = argv[1];
 198                 } else if (matches(opt, "-help") == 0) {
 199                         usage();
 200                 } else {
 201                         fprintf(stderr, "Option \"%s\" is unknown, try \"ip -help\".\n", opt);
 202                         exit(-1);
 203                 }
 204                 argc--; argv++;
 205         }
 206
 207         _SL_ = oneline ? "\\" : "\n" ;
 208
 209         if (batch_file)
 210                 return batch(batch_file);
 211
 212         if (rtnl_open(&rth, 0) < 0)
 213                 exit(1);
 214
 215         if (strlen(basename) > 2)
 216                 return do_cmd(basename+2, argc, argv);
 217
 218         if (argc > 1)
 219                 return do_cmd(argv[1], argc-1, argv+1);
 220
 221         rtnl_close(&rth);
 222         usage();
 223 }