ip.c revision ae665a522bd46bea44c5ea84c89c8b1731954170
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 * Changes: 13 * 14 * Rani Assaf <rani@magic.metawire.com> 980929: resolve addresses 15 */ 16 17#include <stdio.h> 18#include <stdlib.h> 19#include <unistd.h> 20#include <syslog.h> 21#include <fcntl.h> 22#include <sys/socket.h> 23#include <netinet/in.h> 24#include <string.h> 25#include <errno.h> 26 27#include "SNAPSHOT.h" 28#include "utils.h" 29#include "ip_common.h" 30 31int preferred_family = AF_UNSPEC; 32int show_stats = 0; 33int resolve_hosts = 0; 34int oneline = 0; 35int timestamp = 0; 36char * _SL_ = NULL; 37char *batch_file = NULL; 38int force = 0; 39struct rtnl_handle rth = { .fd = -1 }; 40 41static void usage(void) __attribute__((noreturn)); 42 43static 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 | route | rule | neigh | ntable | tunnel |\n" 49" maddr | mroute | monitor | xfrm }\n" 50" OPTIONS := { -V[ersion] | -s[tatistics] | -r[esolve] |\n" 51" -f[amily] { inet | inet6 | ipx | dnet | link } |\n" 52" -o[neline] | -t[imestamp] }\n"); 53 exit(-1); 54} 55 56static int do_help(int argc, char **argv) 57{ 58 usage(); 59} 60 61static const struct cmd { 62 const char *cmd; 63 int (*func)(int argc, char **argv); 64} cmds[] = { 65 { "address", do_ipaddr }, 66 { "maddress", do_multiaddr }, 67 { "route", do_iproute }, 68 { "rule", do_iprule }, 69 { "neighbor", do_ipneigh }, 70 { "neighbour", do_ipneigh }, 71 { "ntable", do_ipntable }, 72 { "ntbl", do_ipntable }, 73 { "link", do_iplink }, 74 { "tunnel", do_iptunnel }, 75 { "tunl", do_iptunnel }, 76 { "monitor", do_ipmonitor }, 77 { "xfrm", do_xfrm }, 78 { "mroute", do_multiroute }, 79 { "help", do_help }, 80 { 0 } 81}; 82 83static int do_cmd(const char *argv0, int argc, char **argv) 84{ 85 const struct cmd *c; 86 87 for (c = cmds; c->cmd; ++c) { 88 if (matches(argv0, c->cmd) == 0) 89 return c->func(argc-1, argv+1); 90 } 91 92 fprintf(stderr, "Object \"%s\" is unknown, try \"ip help\".\n", argv0); 93 return -1; 94} 95 96static int batch(const char *name) 97{ 98 char *line = NULL; 99 size_t len = 0; 100 int ret = 0; 101 int lineno = 0; 102 103 if (name && strcmp(name, "-") != 0) { 104 if (freopen(name, "r", stdin) == NULL) { 105 fprintf(stderr, "Cannot open file \"%s\" for reading: %s=n", 106 name, strerror(errno)); 107 return -1; 108 } 109 } 110 111 if (rtnl_open(&rth, 0) < 0) { 112 fprintf(stderr, "Cannot open rtnetlink\n"); 113 return -1; 114 } 115 116 while (getcmdline(&line, &len, stdin) != -1) { 117 char *largv[100]; 118 int largc; 119 120 largc = makeargs(line, largv, 100); 121 if (largc == 0) 122 continue; /* blank line */ 123 124 if (do_cmd(largv[0], largc, largv)) { 125 fprintf(stderr, "Command failed %s:%d\n", name, lineno); 126 ret = 1; 127 if (!force) 128 break; 129 } 130 } 131 if (line) 132 free(line); 133 134 rtnl_close(&rth); 135 return ret; 136} 137 138 139int main(int argc, char **argv) 140{ 141 char *basename; 142 143 basename = strrchr(argv[0], '/'); 144 if (basename == NULL) 145 basename = argv[0]; 146 else 147 basename++; 148 149 while (argc > 1) { 150 char *opt = argv[1]; 151 if (strcmp(opt,"--") == 0) { 152 argc--; argv++; 153 break; 154 } 155 if (opt[0] != '-') 156 break; 157 if (opt[1] == '-') 158 opt++; 159 if (matches(opt, "-family") == 0) { 160 argc--; 161 argv++; 162 if (argc <= 1) 163 usage(); 164 if (strcmp(argv[1], "inet") == 0) 165 preferred_family = AF_INET; 166 else if (strcmp(argv[1], "inet6") == 0) 167 preferred_family = AF_INET6; 168 else if (strcmp(argv[1], "dnet") == 0) 169 preferred_family = AF_DECnet; 170 else if (strcmp(argv[1], "link") == 0) 171 preferred_family = AF_PACKET; 172 else if (strcmp(argv[1], "ipx") == 0) 173 preferred_family = AF_IPX; 174 else if (strcmp(argv[1], "help") == 0) 175 usage(); 176 else 177 invarg(argv[1], "invalid protocol family"); 178 } else if (strcmp(opt, "-4") == 0) { 179 preferred_family = AF_INET; 180 } else if (strcmp(opt, "-6") == 0) { 181 preferred_family = AF_INET6; 182 } else if (strcmp(opt, "-0") == 0) { 183 preferred_family = AF_PACKET; 184 } else if (strcmp(opt, "-I") == 0) { 185 preferred_family = AF_IPX; 186 } else if (strcmp(opt, "-D") == 0) { 187 preferred_family = AF_DECnet; 188 } else if (matches(opt, "-stats") == 0 || 189 matches(opt, "-statistics") == 0) { 190 ++show_stats; 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, "-help") == 0) { 213 usage(); 214 } else { 215 fprintf(stderr, "Option \"%s\" is unknown, try \"ip -help\".\n", opt); 216 exit(-1); 217 } 218 argc--; argv++; 219 } 220 221 _SL_ = oneline ? "\\" : "\n" ; 222 223 if (batch_file) 224 return batch(batch_file); 225 226 if (rtnl_open(&rth, 0) < 0) 227 exit(1); 228 229 if (strlen(basename) > 2) 230 return do_cmd(basename+2, argc, argv); 231 232 if (argc > 1) 233 return do_cmd(argv[1], argc-1, argv+1); 234 235 rtnl_close(&rth); 236 usage(); 237} 238