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 show_details = 0;
  34 int resolve_hosts = 0;
  35 int oneline = 0;
  36 int timestamp = 0;
  37 char * _SL_ = NULL;
  38 char *batch_file = NULL;
  39 int force = 0;
  40 struct rtnl_handle rth = { .fd = -1 };
  41
  42 static void usage(void) __attribute__((noreturn));
  43
  44 static void usage(void)
  45 {
  46         fprintf(stderr,
  47 "Usage: ip [ OPTIONS ] OBJECT { COMMAND | help }\n"
  48 "       ip [ -force ] -batch filename\n"
  49 "where  OBJECT := { link | addr | addrlabel | route | rule | neigh | ntable |\n"
  50 "                   tunnel | maddr | mroute | monitor | xfrm }\n"
  51 "       OPTIONS := { -V[ersion] | -s[tatistics] | -d[etails] | -r[esolve] |\n"
  52 "                    -f[amily] { inet | inet6 | ipx | dnet | link } |\n"
  53 "                    -o[neline] | -t[imestamp] | -b[atch] [filename] |\n"
  54 "                    -rc[vbuf] [size]}\n");
  55         exit(-1);
  56 }
  57
  58 static int do_help(int argc, char **argv)
  59 {
  60         usage();
  61 }
  62
  63 static const struct cmd {
  64         const char *cmd;
  65         int (*func)(int argc, char **argv);
  66 } cmds[] = {
  67         { "address",    do_ipaddr },
  68         { "addrlabel",  do_ipaddrlabel },
  69         { "maddress",   do_multiaddr },
  70         { "route",      do_iproute },
  71         { "rule",       do_iprule },
  72         { "neighbor",   do_ipneigh },
  73         { "neighbour",  do_ipneigh },
  74         { "ntable",     do_ipntable },
  75         { "ntbl",       do_ipntable },
  76         { "link",       do_iplink },
  77         { "tunnel",     do_iptunnel },
  78         { "tunl",       do_iptunnel },
  79         { "monitor",    do_ipmonitor },
  80         { "xfrm",       do_xfrm },
  81         { "mroute",     do_multiroute },
  82         { "help",       do_help },
  83         { 0 }
  84 };
  85
  86 static int do_cmd(const char *argv0, int argc, char **argv)
  87 {
  88         const struct cmd *c;
  89
  90         for (c = cmds; c->cmd; ++c) {
  91                 if (matches(argv0, c->cmd) == 0)
  92                         return c->func(argc-1, argv+1);
  93         }
  94
  95         fprintf(stderr, "Object \"%s\" is unknown, try \"ip help\".\n", argv0);
  96         return -1;
  97 }
  98
  99 static int batch(const char *name)
 100 {
 101         char *line = NULL;
 102         size_t len = 0;
 103         int ret = 0;
 104         int lineno = 0;
 105
 106         if (name && strcmp(name, "-") != 0) {
 107                 if (freopen(name, "r", stdin) == NULL) {
 108                         fprintf(stderr, "Cannot open file \"%s\" for reading: %s\n",
 109                                 name, strerror(errno));
 110                         return -1;
 111                 }
 112         }
 113
 114         if (rtnl_open(&rth, 0) < 0) {
 115                 fprintf(stderr, "Cannot open rtnetlink\n");
 116                 return -1;
 117         }
 118
 119         while (getcmdline(&line, &len, stdin) != -1) {
 120                 char *largv[100];
 121                 int largc;
 122
 123                 largc = makeargs(line, largv, 100);
 124                 if (largc == 0)
 125                         continue;       /* blank line */
 126
 127                 if (do_cmd(largv[0], largc, largv)) {
 128                         fprintf(stderr, "Command failed %s:%d\n", name, lineno);
 129                         ret = 1;
 130                         if (!force)
 131                                 break;
 132                 }
 133         }
 134         if (line)
 135                 free(line);
 136
 137         rtnl_close(&rth);
 138         return ret;
 139 }
 140
 141
 142 int main(int argc, char **argv)
 143 {
 144         char *basename;
 145
 146         basename = strrchr(argv[0], '/');
 147         if (basename == NULL)
 148                 basename = argv[0];
 149         else
 150                 basename++;
 151
 152         while (argc > 1) {
 153                 char *opt = argv[1];
 154                 if (strcmp(opt,"--") == 0) {
 155                         argc--; argv++;
 156                         break;
 157                 }
 158                 if (opt[0] != '-')
 159                         break;
 160                 if (opt[1] == '-')
 161                         opt++;
 162                 if (matches(opt, "-family") == 0) {
 163                         argc--;
 164                         argv++;
 165                         if (argc <= 1)
 166                                 usage();
 167                         if (strcmp(argv[1], "inet") == 0)
 168                                 preferred_family = AF_INET;
 169                         else if (strcmp(argv[1], "inet6") == 0)
 170                                 preferred_family = AF_INET6;
 171                         else if (strcmp(argv[1], "dnet") == 0)
 172                                 preferred_family = AF_DECnet;
 173                         else if (strcmp(argv[1], "link") == 0)
 174                                 preferred_family = AF_PACKET;
 175                         else if (strcmp(argv[1], "ipx") == 0)
 176                                 preferred_family = AF_IPX;
 177                         else if (strcmp(argv[1], "help") == 0)
 178                                 usage();
 179                         else
 180                                 invarg(argv[1], "invalid protocol family");
 181                 } else if (strcmp(opt, "-4") == 0) {
 182                         preferred_family = AF_INET;
 183                 } else if (strcmp(opt, "-6") == 0) {
 184                         preferred_family = AF_INET6;
 185                 } else if (strcmp(opt, "-0") == 0) {
 186                         preferred_family = AF_PACKET;
 187                 } else if (strcmp(opt, "-I") == 0) {
 188                         preferred_family = AF_IPX;
 189                 } else if (strcmp(opt, "-D") == 0) {
 190                         preferred_family = AF_DECnet;
 191                 } else if (matches(opt, "-stats") == 0 ||
 192                            matches(opt, "-statistics") == 0) {
 193                         ++show_stats;
 194                 } else if (matches(opt, "-details") == 0) {
 195                         ++show_details;
 196                 } else if (matches(opt, "-resolve") == 0) {
 197                         ++resolve_hosts;
 198                 } else if (matches(opt, "-oneline") == 0) {
 199                         ++oneline;
 200                 } else if (matches(opt, "-timestamp") == 0) {
 201                         ++timestamp;
 202 #if 0
 203                 } else if (matches(opt, "-numeric") == 0) {
 204                         rtnl_names_numeric++;
 205 #endif
 206                 } else if (matches(opt, "-Version") == 0) {
 207                         printf("ip utility, iproute2-ss%s\n", SNAPSHOT);
 208                         exit(0);
 209                 } else if (matches(opt, "-force") == 0) {
 210                         ++force;
 211                 } else if (matches(opt, "-batch") == 0) {
 212                         argc--;
 213                         argv++;
 214                         if (argc <= 1)
 215                                 usage();
 216                         batch_file = argv[1];
 217                 } else if (matches(opt, "-rcvbuf") == 0) {
 218                         unsigned int size;
 219
 220                         argc--;
 221                         argv++;
 222                         if (argc <= 1)
 223                                 usage();
 224                         if (get_unsigned(&size, argv[1], 0)) {
 225                                 fprintf(stderr, "Invalid rcvbuf size '%s'\n",
 226                                         argv[1]);
 227                                 exit(-1);
 228                         }
 229                         rcvbuf = size;
 230                 } else if (matches(opt, "-help") == 0) {
 231                         usage();
 232                 } else {
 233                         fprintf(stderr, "Option \"%s\" is unknown, try \"ip -help\".\n", opt);
 234                         exit(-1);
 235                 }
 236                 argc--; argv++;
 237         }
 238
 239         _SL_ = oneline ? "\\" : "\n" ;
 240
 241         if (batch_file)
 242                 return batch(batch_file);
 243
 244         if (rtnl_open(&rth, 0) < 0)
 245                 exit(1);
 246
 247         if (strlen(basename) > 2)
 248                 return do_cmd(basename+2, argc, argv);
 249
 250         if (argc > 1)
 251                 return do_cmd(argv[1], argc-1, argv+1);
 252
 253         rtnl_close(&rth);
 254         usage();
 255 }