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