ip.c revision 84616f8317554be7542b2e89b69f4129995cb03b
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; 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 | 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 { "addr", do_ipaddr }, 66 { "maddr", do_multiaddr }, 67 { "route", do_iproute }, 68 { "rule", do_iprule }, 69 { "neigh", do_ipneigh }, 70 { "link", do_iplink }, 71 { "tunnel", do_iptunnel }, 72 { "monitor", do_ipmonitor }, 73 { "xfrm", do_xfrm }, 74 { "mroute", do_multiroute }, 75 { "help", do_help }, 76 { 0 } 77}; 78 79static int do_cmd(const char *argv0, int argc, char **argv) 80{ 81 const struct cmd *c; 82 83 for (c = cmds; c->cmd; ++c) 84 if (strcmp(c->cmd, argv0) == 0) 85 return c->func(argc-1, argv+1); 86 87 fprintf(stderr, "Object \"%s\" is unknown, try \"ip help\".\n", argv0); 88 exit(-1); 89} 90 91static int batch(const char *name) 92{ 93 char *line = NULL; 94 size_t len = 0; 95 int ret = 0; 96 int lineno = 0; 97 98 if (name && strcmp(name, "-") != 0) { 99 if (freopen(name, "r", stdin) == NULL) { 100 fprintf(stderr, "Cannot open file \"%s\" for reading: %s=n", 101 name, strerror(errno)); 102 return -1; 103 } 104 } 105 106 if (rtnl_open(&rth, 0) < 0) { 107 fprintf(stderr, "Cannot open rtnetlink\n"); 108 return -1; 109 } 110 111 while (getcmdline(&line, &len, stdin) != -1) { 112 char *largv[100]; 113 int largc; 114 115 largc = makeargs(line, largv, 100); 116 if (largc == 0) 117 continue; /* blank line */ 118 119 if (do_cmd(largv[0], largc, largv)) { 120 fprintf(stderr, "Command failed %s:%d\n", name, lineno); 121 ret = 1; 122 if (!force) 123 break; 124 } 125 } 126 if (line) 127 free(line); 128 129 rtnl_close(&rth); 130 return ret; 131} 132 133 134int main(int argc, char **argv) 135{ 136 char *basename; 137 138 basename = strrchr(argv[0], '/'); 139 if (basename == NULL) 140 basename = argv[0]; 141 else 142 basename++; 143 144 while (argc > 1) { 145 char *opt = argv[1]; 146 if (strcmp(opt,"--") == 0) { 147 argc--; argv++; 148 break; 149 } 150 if (opt[0] != '-') 151 break; 152 if (opt[1] == '-') 153 opt++; 154 if (matches(opt, "-family") == 0) { 155 argc--; 156 argv++; 157 if (argc <= 1) 158 usage(); 159 if (strcmp(argv[1], "inet") == 0) 160 preferred_family = AF_INET; 161 else if (strcmp(argv[1], "inet6") == 0) 162 preferred_family = AF_INET6; 163 else if (strcmp(argv[1], "dnet") == 0) 164 preferred_family = AF_DECnet; 165 else if (strcmp(argv[1], "link") == 0) 166 preferred_family = AF_PACKET; 167 else if (strcmp(argv[1], "ipx") == 0) 168 preferred_family = AF_IPX; 169 else if (strcmp(argv[1], "help") == 0) 170 usage(); 171 else 172 invarg(argv[1], "invalid protocol family"); 173 } else if (strcmp(opt, "-4") == 0) { 174 preferred_family = AF_INET; 175 } else if (strcmp(opt, "-6") == 0) { 176 preferred_family = AF_INET6; 177 } else if (strcmp(opt, "-0") == 0) { 178 preferred_family = AF_PACKET; 179 } else if (strcmp(opt, "-I") == 0) { 180 preferred_family = AF_IPX; 181 } else if (strcmp(opt, "-D") == 0) { 182 preferred_family = AF_DECnet; 183 } else if (matches(opt, "-stats") == 0 || 184 matches(opt, "-statistics") == 0) { 185 ++show_stats; 186 } else if (matches(opt, "-resolve") == 0) { 187 ++resolve_hosts; 188 } else if (matches(opt, "-oneline") == 0) { 189 ++oneline; 190 } else if (matches(opt, "-timestamp") == 0) { 191 ++timestamp; 192#if 0 193 } else if (matches(opt, "-numeric") == 0) { 194 rtnl_names_numeric++; 195#endif 196 } else if (matches(opt, "-Version") == 0) { 197 printf("ip utility, iproute2-ss%s\n", SNAPSHOT); 198 exit(0); 199 } else if (matches(opt, "-force") == 0) { 200 ++force; 201 } else if (matches(opt, "-batch") == 0) { 202 argc--; 203 argv++; 204 if (argc <= 1) 205 usage(); 206 batch_file = argv[1]; 207 } else if (matches(opt, "-help") == 0) { 208 usage(); 209 } else { 210 fprintf(stderr, "Option \"%s\" is unknown, try \"ip -help\".\n", opt); 211 exit(-1); 212 } 213 argc--; argv++; 214 } 215 216 _SL_ = oneline ? "\\" : "\n" ; 217 218 if (batch_file) 219 return batch(batch_file); 220 221 if (rtnl_open(&rth, 0) < 0) 222 exit(1); 223 224 if (strlen(basename) > 2) 225 return do_cmd(basename+2, argc, argv); 226 227 if (argc > 1) 228 return do_cmd(argv[1], argc-1, argv+1); 229 230 rtnl_close(&rth); 231 usage(); 232} 233