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 #include <stdio.h>
  13 #include <stdlib.h>
  14 #include <unistd.h>
  15 #include <syslog.h>
  16 #include <fcntl.h>
  17 #include <sys/socket.h>
  18 #include <netinet/in.h>
  19 #include <string.h>
  20 #include <errno.h>
  21
  22 #include "SNAPSHOT.h"
  23 #include "utils.h"
  24 #include "ip_common.h"
  25
  26 int preferred_family = AF_UNSPEC;
  27 int show_stats = 0;
  28 int show_details = 0;
  29 int resolve_hosts = 0;
  30 int oneline = 0;
  31 int timestamp = 0;
  32 char * _SL_ = NULL;
  33 char *batch_file = NULL;
  34 int force = 0;
  35 struct rtnl_handle rth = { .fd = -1 };
  36
  37 static void usage(void) __attribute__((noreturn));
  38
  39 static void usage(void)
  40 {
  41         fprintf(stderr,
  42 "Usage: ip [ OPTIONS ] OBJECT { COMMAND | help }\n"
  43 "       ip [ -force ] -batch filename\n"
  44 "where  OBJECT := { link | addr | addrlabel | route | rule | neigh | ntable |\n"
  45 "                   tunnel | tuntap | maddr | mroute | monitor | xfrm }\n"
  46 "       OPTIONS := { -V[ersion] | -s[tatistics] | -d[etails] | -r[esolve] |\n"
  47 "                    -f[amily] { inet | inet6 | ipx | dnet | link } |\n"
  48 "                    -o[neline] | -t[imestamp] | -b[atch] [filename] |\n"
  49 "                    -rc[vbuf] [size]}\n");
  50         exit(-1);
  51 }
  52
  53 static int do_help(int argc, char **argv)
  54 {
  55         usage();
  56 }
  57
  58 static const struct cmd {
  59         const char *cmd;
  60         int (*func)(int argc, char **argv);
  61 } cmds[] = {
  62         { "address",    do_ipaddr },
  63         { "addrlabel",  do_ipaddrlabel },
  64         { "maddress",   do_multiaddr },
  65         { "route",      do_iproute },
  66         { "rule",       do_iprule },
  67         { "neighbor",   do_ipneigh },
  68         { "neighbour",  do_ipneigh },
  69         { "ntable",     do_ipntable },
  70         { "ntbl",       do_ipntable },
  71         { "link",       do_iplink },
  72         { "tunnel",     do_iptunnel },
  73         { "tunl",       do_iptunnel },
  74         { "tuntap",     do_iptuntap },
  75         { "tap",        do_iptuntap },
  76         { "monitor",    do_ipmonitor },
  77         { "xfrm",       do_xfrm },
  78         { "mroute",     do_multiroute },
  79         { "help",       do_help },
  80         { 0 }
  81 };
  82
  83 static int do_cmd(const char *argv0, int argc, char **argv)
  84 {
  85         const struct cmd *c;
  86
  87         for (c = cmds; c->cmd; ++c) {
  88                 if (matches(argv0, c->cmd) == 0)
  89                         return c->func(argc-1, argv+1);
  90         }
  91
  92         fprintf(stderr, "Object \"%s\" is unknown, try \"ip help\".\n", argv0);
  93         return -1;
  94 }
  95
  96 static int batch(const char *name)
  97 {
  98         char *line = NULL;
  99         size_t len = 0;
 100         int ret = 0;
 101
 102         if (name && strcmp(name, "-") != 0) {
 103                 if (freopen(name, "r", stdin) == NULL) {
 104                         fprintf(stderr, "Cannot open file \"%s\" for reading: %s\n",
 105                                 name, strerror(errno));
 106                         return -1;
 107                 }
 108         }
 109
 110         if (rtnl_open(&rth, 0) < 0) {
 111                 fprintf(stderr, "Cannot open rtnetlink\n");
 112                 return -1;
 113         }
 114
 115         cmdlineno = 0;
 116         while (getcmdline(&line, &len, stdin) != -1) {
 117                 char *largv[100];
 118                 int largc;
 119
 120                 largc = makeargs(line, largv, 100);
 121                 if (largc == 0)
 122                         continue;       /* blank line */
 123
 124                 if (do_cmd(largv[0], largc, largv)) {
 125                         fprintf(stderr, "Command failed %s:%d\n", name, cmdlineno);
 126                         ret = 1;
 127                         if (!force)
 128                                 break;
 129                 }
 130         }
 131         if (line)
 132                 free(line);
 133
 134         rtnl_close(&rth);
 135         return ret;
 136 }
 137
 138
 139 int main(int argc, char **argv)
 140 {
 141         char *basename;
 142
 143         basename = strrchr(argv[0], '/');
 144         if (basename == NULL)
 145                 basename = argv[0];
 146         else
 147                 basename++;
 148
 149         while (argc > 1) {
 150                 char *opt = argv[1];
 151                 if (strcmp(opt,"--") == 0) {
 152                         argc--; argv++;
 153                         break;
 154                 }
 155                 if (opt[0] != '-')
 156                         break;
 157                 if (opt[1] == '-')
 158                         opt++;
 159                 if (matches(opt, "-family") == 0) {
 160                         argc--;
 161                         argv++;
 162                         if (argc <= 1)
 163                                 usage();
 164                         if (strcmp(argv[1], "inet") == 0)
 165                                 preferred_family = AF_INET;
 166                         else if (strcmp(argv[1], "inet6") == 0)
 167                                 preferred_family = AF_INET6;
 168                         else if (strcmp(argv[1], "dnet") == 0)
 169                                 preferred_family = AF_DECnet;
 170                         else if (strcmp(argv[1], "link") == 0)
 171                                 preferred_family = AF_PACKET;
 172                         else if (strcmp(argv[1], "ipx") == 0)
 173                                 preferred_family = AF_IPX;
 174                         else if (strcmp(argv[1], "help") == 0)
 175                                 usage();
 176                         else
 177                                 invarg(argv[1], "invalid protocol family");
 178                 } else if (strcmp(opt, "-4") == 0) {
 179                         preferred_family = AF_INET;
 180                 } else if (strcmp(opt, "-6") == 0) {
 181                         preferred_family = AF_INET6;
 182                 } else if (strcmp(opt, "-0") == 0) {
 183                         preferred_family = AF_PACKET;
 184                 } else if (strcmp(opt, "-I") == 0) {
 185                         preferred_family = AF_IPX;
 186                 } else if (strcmp(opt, "-D") == 0) {
 187                         preferred_family = AF_DECnet;
 188                 } else if (matches(opt, "-stats") == 0 ||
 189                            matches(opt, "-statistics") == 0) {
 190                         ++show_stats;
 191                 } else if (matches(opt, "-details") == 0) {
 192                         ++show_details;
 193                 } else if (matches(opt, "-resolve") == 0) {
 194                         ++resolve_hosts;
 195                 } else if (matches(opt, "-oneline") == 0) {
 196                         ++oneline;
 197                 } else if (matches(opt, "-timestamp") == 0) {
 198                         ++timestamp;
 199 #if 0
 200                 } else if (matches(opt, "-numeric") == 0) {
 201                         rtnl_names_numeric++;
 202 #endif
 203                 } else if (matches(opt, "-Version") == 0) {
 204                         printf("ip utility, iproute2-ss%s\n", SNAPSHOT);
 205                         exit(0);
 206                 } else if (matches(opt, "-force") == 0) {
 207                         ++force;
 208                 } else if (matches(opt, "-batch") == 0) {
 209                         argc--;
 210                         argv++;
 211                         if (argc <= 1)
 212                                 usage();
 213                         batch_file = argv[1];
 214                 } else if (matches(opt, "-rcvbuf") == 0) {
 215                         unsigned int size;
 216
 217                         argc--;
 218                         argv++;
 219                         if (argc <= 1)
 220                                 usage();
 221                         if (get_unsigned(&size, argv[1], 0)) {
 222                                 fprintf(stderr, "Invalid rcvbuf size '%s'\n",
 223                                         argv[1]);
 224                                 exit(-1);
 225                         }
 226                         rcvbuf = size;
 227                 } else if (matches(opt, "-help") == 0) {
 228                         usage();
 229                 } else {
 230                         fprintf(stderr, "Option \"%s\" is unknown, try \"ip -help\".\n", opt);
 231                         exit(-1);
 232                 }
 233                 argc--; argv++;
 234         }
 235
 236         _SL_ = oneline ? "\\" : "\n" ;
 237
 238         if (batch_file)
 239                 return batch(batch_file);
 240
 241         if (rtnl_open(&rth, 0) < 0)
 242                 exit(1);
 243
 244         if (strlen(basename) > 2)
 245                 return do_cmd(basename+2, argc, argv);
 246
 247         if (argc > 1)
 248                 return do_cmd(argv[1], argc-1, argv+1);
 249
 250         rtnl_close(&rth);
 251         usage();
 252 }