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 json;
  37 int timestamp;
  38 const char *_SL_;
  39 int force;
  40 int max_flush_loops = 10;
  41 int batch_mode;
  42 bool do_all;
  43
  44 struct rtnl_handle rth = { .fd = -1 };
  45
  46 static void usage(void) __attribute__((noreturn));
  47
  48 static void usage(void)
  49 {
  50         fprintf(stderr,
  51 "Usage: ip [ OPTIONS ] OBJECT { COMMAND | help }\n"
  52 "       ip [ -force ] -batch filename\n"
  53 "where  OBJECT := { link | address | addrlabel | route | rule | neigh | ntable |\n"
  54 "                   tunnel | tuntap | maddress | mroute | mrule | monitor | xfrm |\n"
  55 "                   netns | l2tp | fou | macsec | tcp_metrics | token | netconf | ila |\n"
  56 "                   vrf | sr }\n"
  57 "       OPTIONS := { -V[ersion] | -s[tatistics] | -d[etails] | -r[esolve] |\n"
  58 "                    -h[uman-readable] | -iec |\n"
  59 "                    -f[amily] { inet | inet6 | ipx | dnet | mpls | bridge | link } |\n"
  60 "                    -4 | -6 | -I | -D | -B | -0 |\n"
  61 "                    -l[oops] { maximum-addr-flush-attempts } | -br[ief] |\n"
  62 "                    -o[neline] | -t[imestamp] | -ts[hort] | -b[atch] [filename] |\n"
  63 "                    -rc[vbuf] [size] | -n[etns] name | -a[ll] | -c[olor]}\n");
  64         exit(-1);
  65 }
  66
  67 static int do_help(int argc, char **argv)
  68 {
  69         usage();
  70         return 0;
  71 }
  72
  73 static const struct cmd {
  74         const char *cmd;
  75         int (*func)(int argc, char **argv);
  76 } cmds[] = {
  77         { "address",    do_ipaddr },
  78         { "addrlabel",  do_ipaddrlabel },
  79         { "maddress",   do_multiaddr },
  80         { "route",      do_iproute },
  81         { "rule",       do_iprule },
  82         { "neighbor",   do_ipneigh },
  83         { "neighbour",  do_ipneigh },
  84         { "ntable",     do_ipntable },
  85         { "ntbl",       do_ipntable },
  86         { "link",       do_iplink },
  87         { "l2tp",       do_ipl2tp },
  88         { "fou",        do_ipfou },
  89         { "ila",        do_ipila },
  90         { "macsec",     do_ipmacsec },
  91         { "tunnel",     do_iptunnel },
  92         { "tunl",       do_iptunnel },
  93         { "tuntap",     do_iptuntap },
  94         { "tap",        do_iptuntap },
  95         { "token",      do_iptoken },
  96         { "tcpmetrics", do_tcp_metrics },
  97         { "tcp_metrics", do_tcp_metrics },
  98         { "monitor",    do_ipmonitor },
  99         { "xfrm",       do_xfrm },
 100         { "mroute",     do_multiroute },
 101         { "mrule",      do_multirule },
 102         { "netns",      do_netns },
 103         { "netconf",    do_ipnetconf },
 104         { "vrf",        do_ipvrf},
 105         { "sr",         do_seg6 },
 106         { "help",       do_help },
 107         { 0 }
 108 };
 109
 110 static int do_cmd(const char *argv0, int argc, char **argv)
 111 {
 112         const struct cmd *c;
 113
 114         for (c = cmds; c->cmd; ++c) {
 115                 if (matches(argv0, c->cmd) == 0)
 116                         return -(c->func(argc-1, argv+1));
 117         }
 118
 119         fprintf(stderr, "Object \"%s\" is unknown, try \"ip help\".\n", argv0);
 120         return EXIT_FAILURE;
 121 }
 122
 123 static int batch(const char *name)
 124 {
 125         char *line = NULL;
 126         size_t len = 0;
 127         int ret = EXIT_SUCCESS;
 128         int orig_family = preferred_family;
 129
 130         batch_mode = 1;
 131
 132         if (name && strcmp(name, "-") != 0) {
 133                 if (freopen(name, "r", stdin) == NULL) {
 134                         fprintf(stderr,
 135                                 "Cannot open file \"%s\" for reading: %s\n",
 136                                 name, strerror(errno));
 137                         return EXIT_FAILURE;
 138                 }
 139         }
 140
 141         if (rtnl_open(&rth, 0) < 0) {
 142                 fprintf(stderr, "Cannot open rtnetlink\n");
 143                 return EXIT_FAILURE;
 144         }
 145
 146         cmdlineno = 0;
 147         while (getcmdline(&line, &len, stdin) != -1) {
 148                 char *largv[100];
 149                 int largc;
 150
 151                 preferred_family = orig_family;
 152
 153                 largc = makeargs(line, largv, 100);
 154                 if (largc == 0)
 155                         continue;       /* blank line */
 156
 157                 if (do_cmd(largv[0], largc, largv)) {
 158                         fprintf(stderr, "Command failed %s:%d\n",
 159                                 name, cmdlineno);
 160                         ret = EXIT_FAILURE;
 161                         if (!force)
 162                                 break;
 163                 }
 164         }
 165         if (line)
 166                 free(line);
 167
 168         rtnl_close(&rth);
 169         return ret;
 170 }
 171
 172
 173 int main(int argc, char **argv)
 174 {
 175         char *basename;
 176         char *batch_file = NULL;
 177
 178         basename = strrchr(argv[0], '/');
 179         if (basename == NULL)
 180                 basename = argv[0];
 181         else
 182                 basename++;
 183
 184         while (argc > 1) {
 185                 char *opt = argv[1];
 186
 187                 if (strcmp(opt, "--") == 0) {
 188                         argc--; argv++;
 189                         break;
 190                 }
 191                 if (opt[0] != '-')
 192                         break;
 193                 if (opt[1] == '-')
 194                         opt++;
 195                 if (matches(opt, "-loops") == 0) {
 196                         argc--;
 197                         argv++;
 198                         if (argc <= 1)
 199                                 usage();
 200                         max_flush_loops = atoi(argv[1]);
 201                 } else if (matches(opt, "-family") == 0) {
 202                         argc--;
 203                         argv++;
 204                         if (argc <= 1)
 205                                 usage();
 206                         if (strcmp(argv[1], "help") == 0)
 207                                 usage();
 208                         else
 209                                 preferred_family = read_family(argv[1]);
 210                         if (preferred_family == AF_UNSPEC)
 211                                 invarg("invalid protocol family", argv[1]);
 212                 } else if (strcmp(opt, "-4") == 0) {
 213                         preferred_family = AF_INET;
 214                 } else if (strcmp(opt, "-6") == 0) {
 215                         preferred_family = AF_INET6;
 216                 } else if (strcmp(opt, "-0") == 0) {
 217                         preferred_family = AF_PACKET;
 218                 } else if (strcmp(opt, "-I") == 0) {
 219                         preferred_family = AF_IPX;
 220                 } else if (strcmp(opt, "-D") == 0) {
 221                         preferred_family = AF_DECnet;
 222                 } else if (strcmp(opt, "-M") == 0) {
 223                         preferred_family = AF_MPLS;
 224                 } else if (strcmp(opt, "-B") == 0) {
 225                         preferred_family = AF_BRIDGE;
 226                 } else if (matches(opt, "-human") == 0 ||
 227                            matches(opt, "-human-readable") == 0) {
 228                         ++human_readable;
 229                 } else if (matches(opt, "-iec") == 0) {
 230                         ++use_iec;
 231                 } else if (matches(opt, "-stats") == 0 ||
 232                            matches(opt, "-statistics") == 0) {
 233                         ++show_stats;
 234                 } else if (matches(opt, "-details") == 0) {
 235                         ++show_details;
 236                 } else if (matches(opt, "-resolve") == 0) {
 237                         ++resolve_hosts;
 238                 } else if (matches(opt, "-oneline") == 0) {
 239                         ++oneline;
 240                 } else if (matches(opt, "-timestamp") == 0) {
 241                         ++timestamp;
 242                 } else if (matches(opt, "-tshort") == 0) {
 243                         ++timestamp;
 244                         ++timestamp_short;
 245 #if 0
 246                 } else if (matches(opt, "-numeric") == 0) {
 247                         rtnl_names_numeric++;
 248 #endif
 249                 } else if (matches(opt, "-Version") == 0) {
 250                         printf("ip utility, iproute2-ss%s\n", SNAPSHOT);
 251                         exit(0);
 252                 } else if (matches(opt, "-force") == 0) {
 253                         ++force;
 254                 } else if (matches(opt, "-batch") == 0) {
 255                         argc--;
 256                         argv++;
 257                         if (argc <= 1)
 258                                 usage();
 259                         batch_file = argv[1];
 260                 } else if (matches(opt, "-brief") == 0) {
 261                         ++brief;
 262                 } else if (matches(opt, "-json") == 0) {
 263                         ++json;
 264                 } else if (matches(opt, "-rcvbuf") == 0) {
 265                         unsigned int size;
 266
 267                         argc--;
 268                         argv++;
 269                         if (argc <= 1)
 270                                 usage();
 271                         if (get_unsigned(&size, argv[1], 0)) {
 272                                 fprintf(stderr, "Invalid rcvbuf size '%s'\n",
 273                                         argv[1]);
 274                                 exit(-1);
 275                         }
 276                         rcvbuf = size;
 277                 } else if (matches(opt, "-color") == 0) {
 278                         enable_color();
 279                 } else if (matches(opt, "-help") == 0) {
 280                         usage();
 281                 } else if (matches(opt, "-netns") == 0) {
 282                         NEXT_ARG();
 283                         if (netns_switch(argv[1]))
 284                                 exit(-1);
 285                 } else if (matches(opt, "-all") == 0) {
 286                         do_all = true;
 287                 } else {
 288                         fprintf(stderr,
 289                                 "Option \"%s\" is unknown, try \"ip -help\".\n",
 290                                 opt);
 291                         exit(-1);
 292                 }
 293                 argc--; argv++;
 294         }
 295
 296         _SL_ = oneline ? "\\" : "\n";
 297
 298         if (json)
 299                 check_if_color_enabled();
 300
 301         if (batch_file)
 302                 return batch(batch_file);
 303
 304         if (rtnl_open(&rth, 0) < 0)
 305                 exit(1);
 306
 307         if (strlen(basename) > 2)
 308                 return do_cmd(basename+2, argc, argv);
 309
 310         if (argc > 1)
 311                 return do_cmd(argv[1], argc-1, argv+1);
 312
 313         rtnl_close(&rth);
 314         usage();
 315 }