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