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