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 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
usage(void)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 | tuntap | maddr | mroute | mrule | 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
do_help(int argc,char ** argv)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 { "tuntap", do_iptuntap },
75 { "tap", do_iptuntap },
76 { "monitor", do_ipmonitor },
77 { "xfrm", do_xfrm },
78 { "mroute", do_multiroute },
79 { "mrule", do_multirule },
80 { "help", do_help },
81 { 0, 0 }
82 };
83
do_cmd(const char * argv0,int argc,char ** argv)84 static int do_cmd(const char *argv0, int argc, char **argv)
85 {
86 const struct cmd *c;
87
88 for (c = cmds; c->cmd; ++c) {
89 if (matches(argv0, c->cmd) == 0)
90 return c->func(argc-1, argv+1);
91 }
92
93 fprintf(stderr, "Object \"%s\" is unknown, try \"ip help\".\n", argv0);
94 return -1;
95 }
96
97 #ifndef ANDROID
batch(const char * name)98 static int batch(const char *name)
99 {
100 char *line = NULL;
101 size_t len = 0;
102 int ret = 0;
103
104 if (name && strcmp(name, "-") != 0) {
105 if (freopen(name, "r", stdin) == NULL) {
106 fprintf(stderr, "Cannot open file \"%s\" for reading: %s\n",
107 name, strerror(errno));
108 return -1;
109 }
110 }
111
112 if (rtnl_open(&rth, 0) < 0) {
113 fprintf(stderr, "Cannot open rtnetlink\n");
114 return -1;
115 }
116
117 cmdlineno = 0;
118 while (getcmdline(&line, &len, stdin) != -1) {
119 char *largv[100];
120 int largc;
121
122 largc = makeargs(line, largv, 100);
123 if (largc == 0)
124 continue; /* blank line */
125
126 if (do_cmd(largv[0], largc, largv)) {
127 fprintf(stderr, "Command failed %s:%d\n", name, cmdlineno);
128 ret = 1;
129 if (!force)
130 break;
131 }
132 }
133 if (line)
134 free(line);
135
136 rtnl_close(&rth);
137 return ret;
138 }
139 #endif
140
main(int argc,char ** argv)141 int main(int argc, char **argv)
142 {
143 char *basename;
144
145 basename = strrchr(argv[0], '/');
146 if (basename == NULL)
147 basename = argv[0];
148 else
149 basename++;
150
151 while (argc > 1) {
152 char *opt = argv[1];
153 if (strcmp(opt,"--") == 0) {
154 argc--; argv++;
155 break;
156 }
157 if (opt[0] != '-')
158 break;
159 if (opt[1] == '-')
160 opt++;
161 if (matches(opt, "-family") == 0) {
162 argc--;
163 argv++;
164 if (argc <= 1)
165 usage();
166 if (strcmp(argv[1], "inet") == 0)
167 preferred_family = AF_INET;
168 else if (strcmp(argv[1], "inet6") == 0)
169 preferred_family = AF_INET6;
170 else if (strcmp(argv[1], "dnet") == 0)
171 preferred_family = AF_DECnet;
172 else if (strcmp(argv[1], "link") == 0)
173 preferred_family = AF_PACKET;
174 else if (strcmp(argv[1], "ipx") == 0)
175 preferred_family = AF_IPX;
176 else if (strcmp(argv[1], "help") == 0)
177 usage();
178 else
179 invarg(argv[1], "invalid protocol family");
180 } else if (strcmp(opt, "-4") == 0) {
181 preferred_family = AF_INET;
182 } else if (strcmp(opt, "-6") == 0) {
183 preferred_family = AF_INET6;
184 } else if (strcmp(opt, "-0") == 0) {
185 preferred_family = AF_PACKET;
186 } else if (strcmp(opt, "-I") == 0) {
187 preferred_family = AF_IPX;
188 } else if (strcmp(opt, "-D") == 0) {
189 preferred_family = AF_DECnet;
190 } else if (matches(opt, "-stats") == 0 ||
191 matches(opt, "-statistics") == 0) {
192 ++show_stats;
193 } else if (matches(opt, "-details") == 0) {
194 ++show_details;
195 } else if (matches(opt, "-resolve") == 0) {
196 ++resolve_hosts;
197 } else if (matches(opt, "-oneline") == 0) {
198 ++oneline;
199 } else if (matches(opt, "-timestamp") == 0) {
200 ++timestamp;
201 #if 0
202 } else if (matches(opt, "-numeric") == 0) {
203 rtnl_names_numeric++;
204 #endif
205 } else if (matches(opt, "-Version") == 0) {
206 printf("ip utility, iproute2-ss%s\n", SNAPSHOT);
207 exit(0);
208 } else if (matches(opt, "-force") == 0) {
209 ++force;
210 #ifndef ANDROID
211 } else if (matches(opt, "-batch") == 0) {
212 argc--;
213 argv++;
214 if (argc <= 1)
215 usage();
216 batch_file = argv[1];
217 #endif
218 } else if (matches(opt, "-rcvbuf") == 0) {
219 unsigned int size;
220
221 argc--;
222 argv++;
223 if (argc <= 1)
224 usage();
225 if (get_unsigned(&size, argv[1], 0)) {
226 fprintf(stderr, "Invalid rcvbuf size '%s'\n",
227 argv[1]);
228 exit(-1);
229 }
230 rcvbuf = size;
231 } else if (matches(opt, "-help") == 0) {
232 usage();
233 } else {
234 fprintf(stderr, "Option \"%s\" is unknown, try \"ip -help\".\n", opt);
235 exit(-1);
236 }
237 argc--; argv++;
238 }
239
240 _SL_ = oneline ? "\\" : "\n" ;
241
242 #ifndef ANDROID
243 if (batch_file)
244 return batch(batch_file);
245 #endif
246
247 if (rtnl_open(&rth, 0) < 0)
248 exit(1);
249
250 if (strlen(basename) > 2)
251 return do_cmd(basename+2, argc, argv);
252
253 if (argc > 1)
254 return do_cmd(argv[1], argc-1, argv+1);
255
256 rtnl_close(&rth);
257 usage();
258 }
259