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 #include "namespace.h"
26 #include "color.h"
27
28 int preferred_family = AF_UNSPEC;
29 int human_readable;
30 int use_iec;
31 int show_stats;
32 int show_details;
33 int oneline;
34 int brief;
35 int json;
36 int timestamp;
37 const char *_SL_;
38 int force;
39 int max_flush_loops = 10;
40 int batch_mode;
41 bool do_all;
42
43 struct rtnl_handle rth = { .fd = -1 };
44
45 static void usage(void) __attribute__((noreturn));
46
usage(void)47 static void usage(void)
48 {
49 fprintf(stderr,
50 "Usage: ip [ OPTIONS ] OBJECT { COMMAND | help }\n"
51 " ip [ -force ] -batch filename\n"
52 "where OBJECT := { link | address | addrlabel | route | rule | neigh | ntable |\n"
53 " tunnel | tuntap | maddress | mroute | mrule | monitor | xfrm |\n"
54 " netns | l2tp | fou | macsec | tcp_metrics | token | netconf | ila |\n"
55 " vrf | sr }\n"
56 " OPTIONS := { -V[ersion] | -s[tatistics] | -d[etails] | -r[esolve] |\n"
57 " -h[uman-readable] | -iec |\n"
58 " -f[amily] { inet | inet6 | ipx | dnet | mpls | bridge | link } |\n"
59 " -4 | -6 | -I | -D | -B | -0 |\n"
60 " -l[oops] { maximum-addr-flush-attempts } | -br[ief] |\n"
61 " -o[neline] | -t[imestamp] | -ts[hort] | -b[atch] [filename] |\n"
62 " -rc[vbuf] [size] | -n[etns] name | -a[ll] | -c[olor]}\n");
63 exit(-1);
64 }
65
do_help(int argc,char ** argv)66 static int do_help(int argc, char **argv)
67 {
68 usage();
69 return 0;
70 }
71
72 static const struct cmd {
73 const char *cmd;
74 int (*func)(int argc, char **argv);
75 } cmds[] = {
76 { "address", do_ipaddr },
77 { "addrlabel", do_ipaddrlabel },
78 { "maddress", do_multiaddr },
79 { "route", do_iproute },
80 { "rule", do_iprule },
81 { "neighbor", do_ipneigh },
82 { "neighbour", do_ipneigh },
83 { "ntable", do_ipntable },
84 { "ntbl", do_ipntable },
85 { "link", do_iplink },
86 { "l2tp", do_ipl2tp },
87 { "fou", do_ipfou },
88 { "ila", do_ipila },
89 { "macsec", do_ipmacsec },
90 { "tunnel", do_iptunnel },
91 { "tunl", do_iptunnel },
92 { "tuntap", do_iptuntap },
93 { "tap", do_iptuntap },
94 { "token", do_iptoken },
95 { "tcpmetrics", do_tcp_metrics },
96 { "tcp_metrics", do_tcp_metrics },
97 { "monitor", do_ipmonitor },
98 { "xfrm", do_xfrm },
99 { "mroute", do_multiroute },
100 { "mrule", do_multirule },
101 { "netns", do_netns },
102 { "netconf", do_ipnetconf },
103 { "vrf", do_ipvrf},
104 { "sr", do_seg6 },
105 { "help", do_help },
106 { 0 }
107 };
108
do_cmd(const char * argv0,int argc,char ** argv)109 static int do_cmd(const char *argv0, int argc, char **argv)
110 {
111 const struct cmd *c;
112
113 for (c = cmds; c->cmd; ++c) {
114 if (matches(argv0, c->cmd) == 0)
115 return -(c->func(argc-1, argv+1));
116 }
117
118 fprintf(stderr, "Object \"%s\" is unknown, try \"ip help\".\n", argv0);
119 return EXIT_FAILURE;
120 }
121
batch(const char * name)122 static int batch(const char *name)
123 {
124 char *line = NULL;
125 size_t len = 0;
126 int ret = EXIT_SUCCESS;
127 int orig_family = preferred_family;
128
129 batch_mode = 1;
130
131 if (name && strcmp(name, "-") != 0) {
132 if (freopen(name, "r", stdin) == NULL) {
133 fprintf(stderr,
134 "Cannot open file \"%s\" for reading: %s\n",
135 name, strerror(errno));
136 return EXIT_FAILURE;
137 }
138 }
139
140 if (rtnl_open(&rth, 0) < 0) {
141 fprintf(stderr, "Cannot open rtnetlink\n");
142 return EXIT_FAILURE;
143 }
144
145 cmdlineno = 0;
146 while (getcmdline(&line, &len, stdin) != -1) {
147 char *largv[100];
148 int largc;
149
150 preferred_family = orig_family;
151
152 largc = makeargs(line, largv, 100);
153 if (largc == 0)
154 continue; /* blank line */
155
156 if (do_cmd(largv[0], largc, largv)) {
157 fprintf(stderr, "Command failed %s:%d\n",
158 name, cmdlineno);
159 ret = EXIT_FAILURE;
160 if (!force)
161 break;
162 }
163 }
164 if (line)
165 free(line);
166
167 rtnl_close(&rth);
168 return ret;
169 }
170
171
main(int argc,char ** argv)172 int main(int argc, char **argv)
173 {
174 char *basename;
175 char *batch_file = NULL;
176
177 basename = strrchr(argv[0], '/');
178 if (basename == NULL)
179 basename = argv[0];
180 else
181 basename++;
182
183 while (argc > 1) {
184 char *opt = argv[1];
185
186 if (strcmp(opt, "--") == 0) {
187 argc--; argv++;
188 break;
189 }
190 if (opt[0] != '-')
191 break;
192 if (opt[1] == '-')
193 opt++;
194 if (matches(opt, "-loops") == 0) {
195 argc--;
196 argv++;
197 if (argc <= 1)
198 usage();
199 max_flush_loops = atoi(argv[1]);
200 } else if (matches(opt, "-family") == 0) {
201 argc--;
202 argv++;
203 if (argc <= 1)
204 usage();
205 if (strcmp(argv[1], "help") == 0)
206 usage();
207 else
208 preferred_family = read_family(argv[1]);
209 if (preferred_family == AF_UNSPEC)
210 invarg("invalid protocol family", argv[1]);
211 } else if (strcmp(opt, "-4") == 0) {
212 preferred_family = AF_INET;
213 } else if (strcmp(opt, "-6") == 0) {
214 preferred_family = AF_INET6;
215 } else if (strcmp(opt, "-0") == 0) {
216 preferred_family = AF_PACKET;
217 } else if (strcmp(opt, "-I") == 0) {
218 preferred_family = AF_IPX;
219 } else if (strcmp(opt, "-D") == 0) {
220 preferred_family = AF_DECnet;
221 } else if (strcmp(opt, "-M") == 0) {
222 preferred_family = AF_MPLS;
223 } else if (strcmp(opt, "-B") == 0) {
224 preferred_family = AF_BRIDGE;
225 } else if (matches(opt, "-human") == 0 ||
226 matches(opt, "-human-readable") == 0) {
227 ++human_readable;
228 } else if (matches(opt, "-iec") == 0) {
229 ++use_iec;
230 } else if (matches(opt, "-stats") == 0 ||
231 matches(opt, "-statistics") == 0) {
232 ++show_stats;
233 } else if (matches(opt, "-details") == 0) {
234 ++show_details;
235 } else if (matches(opt, "-resolve") == 0) {
236 ++resolve_hosts;
237 } else if (matches(opt, "-oneline") == 0) {
238 ++oneline;
239 } else if (matches(opt, "-timestamp") == 0) {
240 ++timestamp;
241 } else if (matches(opt, "-tshort") == 0) {
242 ++timestamp;
243 ++timestamp_short;
244 #if 0
245 } else if (matches(opt, "-numeric") == 0) {
246 rtnl_names_numeric++;
247 #endif
248 } else if (matches(opt, "-Version") == 0) {
249 printf("ip utility, iproute2-ss%s\n", SNAPSHOT);
250 exit(0);
251 } else if (matches(opt, "-force") == 0) {
252 ++force;
253 } else if (matches(opt, "-batch") == 0) {
254 argc--;
255 argv++;
256 if (argc <= 1)
257 usage();
258 batch_file = argv[1];
259 } else if (matches(opt, "-brief") == 0) {
260 ++brief;
261 } else if (matches(opt, "-json") == 0) {
262 ++json;
263 } else if (matches(opt, "-rcvbuf") == 0) {
264 unsigned int size;
265
266 argc--;
267 argv++;
268 if (argc <= 1)
269 usage();
270 if (get_unsigned(&size, argv[1], 0)) {
271 fprintf(stderr, "Invalid rcvbuf size '%s'\n",
272 argv[1]);
273 exit(-1);
274 }
275 rcvbuf = size;
276 } else if (matches(opt, "-color") == 0) {
277 enable_color();
278 } else if (matches(opt, "-help") == 0) {
279 usage();
280 } else if (matches(opt, "-netns") == 0) {
281 NEXT_ARG();
282 if (netns_switch(argv[1]))
283 exit(-1);
284 } else if (matches(opt, "-all") == 0) {
285 do_all = true;
286 } else {
287 fprintf(stderr,
288 "Option \"%s\" is unknown, try \"ip -help\".\n",
289 opt);
290 exit(-1);
291 }
292 argc--; argv++;
293 }
294
295 _SL_ = oneline ? "\\" : "\n";
296
297 if (json)
298 check_if_color_enabled();
299
300 if (batch_file)
301 return batch(batch_file);
302
303 if (rtnl_open(&rth, 0) < 0)
304 exit(1);
305
306 if (strlen(basename) > 2)
307 return do_cmd(basename+2, argc, argv);
308
309 if (argc > 1)
310 return do_cmd(argv[1], argc-1, argv+1);
311
312 rtnl_close(&rth);
313 usage();
314 }
315