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