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