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 #include "namespace.h"
  26 #include "color.h"
  27
  28 int preferred_family = AF_UNSPEC;
  29 int human_readable;
  30 int use_iec;
  31 int show_stats;
  32 int show_details;
  33 int resolve_hosts;
  34 int oneline;
  35 int brief;
  36 int timestamp;
  37 const char *_SL_;
  38 int force;
  39 int max_flush_loops = 10;
  40 int batch_mode;
  41 bool do_all;
  42
  43 struct rtnl_handle rth = { .fd = -1 };
  44
  45 static void usage(void) __attribute__((noreturn));
  46
  47 static void usage(void)
  48 {
  49         fprintf(stderr,
  50 "Usage: ip [ OPTIONS ] OBJECT { COMMAND | help }\n"
  51 "       ip [ -force ] -batch filename\n"
  52 "where  OBJECT := { link | address | addrlabel | route | rule | neigh | ntable |\n"
  53 "                   tunnel | tuntap | maddress | mroute | mrule | monitor | xfrm |\n"
  54 "                   netns | l2tp | fou | tcp_metrics | token | netconf }\n"
  55 "       OPTIONS := { -V[ersion] | -s[tatistics] | -d[etails] | -r[esolve] |\n"
  56 "                    -h[uman-readable] | -iec |\n"
  57 "                    -f[amily] { inet | inet6 | ipx | dnet | mpls | bridge | link } |\n"
  58 "                    -4 | -6 | -I | -D | -B | -0 |\n"
  59 "                    -l[oops] { maximum-addr-flush-attempts } | -br[ief] |\n"
  60 "                    -o[neline] | -t[imestamp] | -ts[hort] | -b[atch] [filename] |\n"
  61 "                    -rc[vbuf] [size] | -n[etns] name | -a[ll] | -c[olor]}\n");
  62         exit(-1);
  63 }
  64
  65 static int do_help(int argc, char **argv)
  66 {
  67         usage();
  68         return 0;
  69 }
  70
  71 static const struct cmd {
  72         const char *cmd;
  73         int (*func)(int argc, char **argv);
  74 } cmds[] = {
  75         { "address",    do_ipaddr },
  76         { "addrlabel",  do_ipaddrlabel },
  77         { "maddress",   do_multiaddr },
  78         { "route",      do_iproute },
  79         { "rule",       do_iprule },
  80         { "neighbor",   do_ipneigh },
  81         { "neighbour",  do_ipneigh },
  82         { "ntable",     do_ipntable },
  83         { "ntbl",       do_ipntable },
  84         { "link",       do_iplink },
  85         { "l2tp",       do_ipl2tp },
  86         { "fou",        do_ipfou },
  87         { "tunnel",     do_iptunnel },
  88         { "tunl",       do_iptunnel },
  89         { "tuntap",     do_iptuntap },
  90         { "tap",        do_iptuntap },
  91         { "token",      do_iptoken },
  92         { "tcpmetrics", do_tcp_metrics },
  93         { "tcp_metrics", do_tcp_metrics },
  94         { "monitor",    do_ipmonitor },
  95         { "xfrm",       do_xfrm },
  96         { "mroute",     do_multiroute },
  97         { "mrule",      do_multirule },
  98         { "netns",      do_netns },
  99         { "netconf",    do_ipnetconf },
 100         { "help",       do_help },
 101         { 0 }
 102 };
 103
 104 static int do_cmd(const char *argv0, int argc, char **argv)
 105 {
 106         const struct cmd *c;
 107
 108         for (c = cmds; c->cmd; ++c) {
 109                 if (matches(argv0, c->cmd) == 0)
 110                         return -(c->func(argc-1, argv+1));
 111         }
 112
 113         fprintf(stderr, "Object \"%s\" is unknown, try \"ip help\".\n", argv0);
 114         return EXIT_FAILURE;
 115 }
 116
 117 static int batch(const char *name)
 118 {
 119         char *line = NULL;
 120         size_t len = 0;
 121         int ret = EXIT_SUCCESS;
 122         int orig_family = preferred_family;
 123
 124         batch_mode = 1;
 125
 126         if (name && strcmp(name, "-") != 0) {
 127                 if (freopen(name, "r", stdin) == NULL) {
 128                         fprintf(stderr,
 129                                 "Cannot open file \"%s\" for reading: %s\n",
 130                                 name, strerror(errno));
 131                         return EXIT_FAILURE;
 132                 }
 133         }
 134
 135         if (rtnl_open(&rth, 0) < 0) {
 136                 fprintf(stderr, "Cannot open rtnetlink\n");
 137                 return EXIT_FAILURE;
 138         }
 139
 140         cmdlineno = 0;
 141         while (getcmdline(&line, &len, stdin) != -1) {
 142                 char *largv[100];
 143                 int largc;
 144
 145                 preferred_family = orig_family;
 146
 147                 largc = makeargs(line, largv, 100);
 148                 if (largc == 0)
 149                         continue;       /* blank line */
 150
 151                 if (do_cmd(largv[0], largc, largv)) {
 152                         fprintf(stderr, "Command failed %s:%d\n",
 153                                 name, cmdlineno);
 154                         ret = EXIT_FAILURE;
 155                         if (!force)
 156                                 break;
 157                 }
 158         }
 159         if (line)
 160                 free(line);
 161
 162         rtnl_close(&rth);
 163         return ret;
 164 }
 165
 166
 167 int main(int argc, char **argv)
 168 {
 169         char *basename;
 170         char *batch_file = NULL;
 171
 172         basename = strrchr(argv[0], '/');
 173         if (basename == NULL)
 174                 basename = argv[0];
 175         else
 176                 basename++;
 177
 178         while (argc > 1) {
 179                 char *opt = argv[1];
 180
 181                 if (strcmp(opt, "--") == 0) {
 182                         argc--; argv++;
 183                         break;
 184                 }
 185                 if (opt[0] != '-')
 186                         break;
 187                 if (opt[1] == '-')
 188                         opt++;
 189                 if (matches(opt, "-loops") == 0) {
 190                         argc--;
 191                         argv++;
 192                         if (argc <= 1)
 193                                 usage();
 194                         max_flush_loops = atoi(argv[1]);
 195                 } else if (matches(opt, "-family") == 0) {
 196                         argc--;
 197                         argv++;
 198                         if (argc <= 1)
 199                                 usage();
 200                         if (strcmp(argv[1], "help") == 0)
 201                                 usage();
 202                         else
 203                                 preferred_family = read_family(argv[1]);
 204                         if (preferred_family == AF_UNSPEC)
 205                                 invarg("invalid protocol family", argv[1]);
 206                 } else if (strcmp(opt, "-4") == 0) {
 207                         preferred_family = AF_INET;
 208                 } else if (strcmp(opt, "-6") == 0) {
 209                         preferred_family = AF_INET6;
 210                 } else if (strcmp(opt, "-0") == 0) {
 211                         preferred_family = AF_PACKET;
 212                 } else if (strcmp(opt, "-I") == 0) {
 213                         preferred_family = AF_IPX;
 214                 } else if (strcmp(opt, "-D") == 0) {
 215                         preferred_family = AF_DECnet;
 216                 } else if (strcmp(opt, "-M") == 0) {
 217                         preferred_family = AF_MPLS;
 218                 } else if (strcmp(opt, "-B") == 0) {
 219                         preferred_family = AF_BRIDGE;
 220                 } else if (matches(opt, "-human") == 0 ||
 221                            matches(opt, "-human-readable") == 0) {
 222                         ++human_readable;
 223                 } else if (matches(opt, "-iec") == 0) {
 224                         ++use_iec;
 225                 } else if (matches(opt, "-stats") == 0 ||
 226                            matches(opt, "-statistics") == 0) {
 227                         ++show_stats;
 228                 } else if (matches(opt, "-details") == 0) {
 229                         ++show_details;
 230                 } else if (matches(opt, "-resolve") == 0) {
 231                         ++resolve_hosts;
 232                 } else if (matches(opt, "-oneline") == 0) {
 233                         ++oneline;
 234                 } else if (matches(opt, "-timestamp") == 0) {
 235                         ++timestamp;
 236                 } else if (matches(opt, "-tshort") == 0) {
 237                         ++timestamp;
 238                         ++timestamp_short;
 239 #if 0
 240                 } else if (matches(opt, "-numeric") == 0) {
 241                         rtnl_names_numeric++;
 242 #endif
 243                 } else if (matches(opt, "-Version") == 0) {
 244                         printf("ip utility, iproute2-ss%s\n", SNAPSHOT);
 245                         exit(0);
 246                 } else if (matches(opt, "-force") == 0) {
 247                         ++force;
 248                 } else if (matches(opt, "-batch") == 0) {
 249                         argc--;
 250                         argv++;
 251                         if (argc <= 1)
 252                                 usage();
 253                         batch_file = argv[1];
 254                 } else if (matches(opt, "-brief") == 0) {
 255                         ++brief;
 256                 } else if (matches(opt, "-rcvbuf") == 0) {
 257                         unsigned int size;
 258
 259                         argc--;
 260                         argv++;
 261                         if (argc <= 1)
 262                                 usage();
 263                         if (get_unsigned(&size, argv[1], 0)) {
 264                                 fprintf(stderr, "Invalid rcvbuf size '%s'\n",
 265                                         argv[1]);
 266                                 exit(-1);
 267                         }
 268                         rcvbuf = size;
 269                 } else if (matches(opt, "-color") == 0) {
 270                         enable_color();
 271                 } else if (matches(opt, "-help") == 0) {
 272                         usage();
 273                 } else if (matches(opt, "-netns") == 0) {
 274                         NEXT_ARG();
 275                         if (netns_switch(argv[1]))
 276                                 exit(-1);
 277                 } else if (matches(opt, "-all") == 0) {
 278                         do_all = true;
 279                 } else {
 280                         fprintf(stderr,
 281                                 "Option \"%s\" is unknown, try \"ip -help\".\n",
 282                                 opt);
 283                         exit(-1);
 284                 }
 285                 argc--; argv++;
 286         }
 287
 288         _SL_ = oneline ? "\\" : "\n";
 289
 290         if (batch_file)
 291                 return batch(batch_file);
 292
 293         if (rtnl_open(&rth, 0) < 0)
 294                 exit(1);
 295
 296         if (strlen(basename) > 2)
 297                 return do_cmd(basename+2, argc, argv);
 298
 299         if (argc > 1)
 300                 return do_cmd(argv[1], argc-1, argv+1);
 301
 302         rtnl_close(&rth);
 303         usage();
 304 }