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 int max_flush_loops = 10;
36
37 struct rtnl_handle rth = { .fd = -1 };
38
39 static void usage(void) __attribute__((noreturn));
40
usage(void)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
do_help(int argc,char ** argv)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
do_cmd(const char * argv0,int argc,char ** argv)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
batch(const char * name)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
main(int argc,char ** argv)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