]>
Commit | Line | Data |
---|---|---|
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 <fcntl.h> | |
16 | #include <sys/socket.h> | |
17 | #include <netinet/in.h> | |
18 | #include <string.h> | |
19 | #include <errno.h> | |
20 | ||
21 | #include "SNAPSHOT.h" | |
22 | #include "utils.h" | |
23 | #include "ip_common.h" | |
24 | #include "namespace.h" | |
25 | #include "color.h" | |
26 | ||
27 | int preferred_family = AF_UNSPEC; | |
28 | int human_readable; | |
29 | int use_iec; | |
30 | int show_stats; | |
31 | int show_details; | |
32 | int oneline; | |
33 | int brief; | |
34 | int json; | |
35 | int timestamp; | |
36 | int force; | |
37 | int max_flush_loops = 10; | |
38 | int batch_mode; | |
39 | bool do_all; | |
40 | ||
41 | struct rtnl_handle rth = { .fd = -1 }; | |
42 | ||
43 | static void usage(void) __attribute__((noreturn)); | |
44 | ||
45 | static void usage(void) | |
46 | { | |
47 | fprintf(stderr, | |
48 | "Usage: ip [ OPTIONS ] OBJECT { COMMAND | help }\n" | |
49 | " ip [ -force ] -batch filename\n" | |
50 | "where OBJECT := { link | address | addrlabel | route | rule | neigh | ntable |\n" | |
51 | " tunnel | tuntap | maddress | mroute | mrule | monitor | xfrm |\n" | |
52 | " netns | l2tp | fou | macsec | tcp_metrics | token | netconf | ila |\n" | |
53 | " vrf | sr }\n" | |
54 | " OPTIONS := { -V[ersion] | -s[tatistics] | -d[etails] | -r[esolve] |\n" | |
55 | " -h[uman-readable] | -iec | -j[son] | -p[retty] |\n" | |
56 | " -f[amily] { inet | inet6 | mpls | bridge | link } |\n" | |
57 | " -4 | -6 | -I | -D | -M | -B | -0 |\n" | |
58 | " -l[oops] { maximum-addr-flush-attempts } | -br[ief] |\n" | |
59 | " -o[neline] | -t[imestamp] | -ts[hort] | -b[atch] [filename] |\n" | |
60 | " -rc[vbuf] [size] | -n[etns] name | -a[ll] | -c[olor]}\n"); | |
61 | exit(-1); | |
62 | } | |
63 | ||
64 | static int do_help(int argc, char **argv) | |
65 | { | |
66 | usage(); | |
67 | return 0; | |
68 | } | |
69 | ||
70 | static const struct cmd { | |
71 | const char *cmd; | |
72 | int (*func)(int argc, char **argv); | |
73 | } cmds[] = { | |
74 | { "address", do_ipaddr }, | |
75 | { "addrlabel", do_ipaddrlabel }, | |
76 | { "maddress", do_multiaddr }, | |
77 | { "route", do_iproute }, | |
78 | { "rule", do_iprule }, | |
79 | { "neighbor", do_ipneigh }, | |
80 | { "neighbour", do_ipneigh }, | |
81 | { "ntable", do_ipntable }, | |
82 | { "ntbl", do_ipntable }, | |
83 | { "link", do_iplink }, | |
84 | { "l2tp", do_ipl2tp }, | |
85 | { "fou", do_ipfou }, | |
86 | { "ila", do_ipila }, | |
87 | { "macsec", do_ipmacsec }, | |
88 | { "tunnel", do_iptunnel }, | |
89 | { "tunl", do_iptunnel }, | |
90 | { "tuntap", do_iptuntap }, | |
91 | { "tap", do_iptuntap }, | |
92 | { "token", do_iptoken }, | |
93 | { "tcpmetrics", do_tcp_metrics }, | |
94 | { "tcp_metrics", do_tcp_metrics }, | |
95 | { "monitor", do_ipmonitor }, | |
96 | { "xfrm", do_xfrm }, | |
97 | { "mroute", do_multiroute }, | |
98 | { "mrule", do_multirule }, | |
99 | { "netns", do_netns }, | |
100 | { "netconf", do_ipnetconf }, | |
101 | { "vrf", do_ipvrf}, | |
102 | { "sr", do_seg6 }, | |
103 | { "help", do_help }, | |
104 | { 0 } | |
105 | }; | |
106 | ||
107 | static int do_cmd(const char *argv0, int argc, char **argv) | |
108 | { | |
109 | const struct cmd *c; | |
110 | ||
111 | for (c = cmds; c->cmd; ++c) { | |
112 | if (matches(argv0, c->cmd) == 0) | |
113 | return -(c->func(argc-1, argv+1)); | |
114 | } | |
115 | ||
116 | fprintf(stderr, "Object \"%s\" is unknown, try \"ip help\".\n", argv0); | |
117 | return EXIT_FAILURE; | |
118 | } | |
119 | ||
120 | static int batch(const char *name) | |
121 | { | |
122 | char *line = NULL; | |
123 | size_t len = 0; | |
124 | int ret = EXIT_SUCCESS; | |
125 | int orig_family = preferred_family; | |
126 | ||
127 | batch_mode = 1; | |
128 | ||
129 | if (name && strcmp(name, "-") != 0) { | |
130 | if (freopen(name, "r", stdin) == NULL) { | |
131 | fprintf(stderr, | |
132 | "Cannot open file \"%s\" for reading: %s\n", | |
133 | name, strerror(errno)); | |
134 | return EXIT_FAILURE; | |
135 | } | |
136 | } | |
137 | ||
138 | if (rtnl_open(&rth, 0) < 0) { | |
139 | fprintf(stderr, "Cannot open rtnetlink\n"); | |
140 | return EXIT_FAILURE; | |
141 | } | |
142 | ||
143 | cmdlineno = 0; | |
144 | while (getcmdline(&line, &len, stdin) != -1) { | |
145 | char *largv[100]; | |
146 | int largc; | |
147 | ||
148 | preferred_family = orig_family; | |
149 | ||
150 | largc = makeargs(line, largv, 100); | |
151 | if (largc == 0) | |
152 | continue; /* blank line */ | |
153 | ||
154 | if (do_cmd(largv[0], largc, largv)) { | |
155 | fprintf(stderr, "Command failed %s:%d\n", | |
156 | name, cmdlineno); | |
157 | ret = EXIT_FAILURE; | |
158 | if (!force) | |
159 | break; | |
160 | } | |
161 | } | |
162 | if (line) | |
163 | free(line); | |
164 | ||
165 | rtnl_close(&rth); | |
166 | return ret; | |
167 | } | |
168 | ||
169 | ||
170 | int main(int argc, char **argv) | |
171 | { | |
172 | char *basename; | |
173 | char *batch_file = NULL; | |
174 | int color = 0; | |
175 | ||
176 | /* to run vrf exec without root, capabilities might be set, drop them | |
177 | * if not needed as the first thing. | |
178 | * execv will drop them for the child command. | |
179 | * vrf exec requires: | |
180 | * - cap_dac_override to create the cgroup subdir in /sys | |
181 | * - cap_sys_admin to load the BPF program | |
182 | * - cap_net_admin to set the socket into the cgroup | |
183 | */ | |
184 | if (argc < 3 || strcmp(argv[1], "vrf") != 0 || | |
185 | strcmp(argv[2], "exec") != 0) | |
186 | drop_cap(); | |
187 | ||
188 | basename = strrchr(argv[0], '/'); | |
189 | if (basename == NULL) | |
190 | basename = argv[0]; | |
191 | else | |
192 | basename++; | |
193 | ||
194 | while (argc > 1) { | |
195 | char *opt = argv[1]; | |
196 | ||
197 | if (strcmp(opt, "--") == 0) { | |
198 | argc--; argv++; | |
199 | break; | |
200 | } | |
201 | if (opt[0] != '-') | |
202 | break; | |
203 | if (opt[1] == '-') | |
204 | opt++; | |
205 | if (matches(opt, "-loops") == 0) { | |
206 | argc--; | |
207 | argv++; | |
208 | if (argc <= 1) | |
209 | usage(); | |
210 | max_flush_loops = atoi(argv[1]); | |
211 | } else if (matches(opt, "-family") == 0) { | |
212 | argc--; | |
213 | argv++; | |
214 | if (argc <= 1) | |
215 | usage(); | |
216 | if (strcmp(argv[1], "help") == 0) | |
217 | usage(); | |
218 | else | |
219 | preferred_family = read_family(argv[1]); | |
220 | if (preferred_family == AF_UNSPEC) | |
221 | invarg("invalid protocol family", argv[1]); | |
222 | } else if (strcmp(opt, "-4") == 0) { | |
223 | preferred_family = AF_INET; | |
224 | } else if (strcmp(opt, "-6") == 0) { | |
225 | preferred_family = AF_INET6; | |
226 | } else if (strcmp(opt, "-0") == 0) { | |
227 | preferred_family = AF_PACKET; | |
228 | } else if (strcmp(opt, "-D") == 0) { | |
229 | preferred_family = AF_DECnet; | |
230 | } else if (strcmp(opt, "-M") == 0) { | |
231 | preferred_family = AF_MPLS; | |
232 | } else if (strcmp(opt, "-B") == 0) { | |
233 | preferred_family = AF_BRIDGE; | |
234 | } else if (matches(opt, "-human") == 0 || | |
235 | matches(opt, "-human-readable") == 0) { | |
236 | ++human_readable; | |
237 | } else if (matches(opt, "-iec") == 0) { | |
238 | ++use_iec; | |
239 | } else if (matches(opt, "-stats") == 0 || | |
240 | matches(opt, "-statistics") == 0) { | |
241 | ++show_stats; | |
242 | } else if (matches(opt, "-details") == 0) { | |
243 | ++show_details; | |
244 | } else if (matches(opt, "-resolve") == 0) { | |
245 | ++resolve_hosts; | |
246 | } else if (matches(opt, "-oneline") == 0) { | |
247 | ++oneline; | |
248 | } else if (matches(opt, "-timestamp") == 0) { | |
249 | ++timestamp; | |
250 | } else if (matches(opt, "-tshort") == 0) { | |
251 | ++timestamp; | |
252 | ++timestamp_short; | |
253 | } else if (matches(opt, "-Version") == 0) { | |
254 | printf("ip utility, iproute2-ss%s\n", SNAPSHOT); | |
255 | exit(0); | |
256 | } else if (matches(opt, "-force") == 0) { | |
257 | ++force; | |
258 | } else if (matches(opt, "-batch") == 0) { | |
259 | argc--; | |
260 | argv++; | |
261 | if (argc <= 1) | |
262 | usage(); | |
263 | batch_file = argv[1]; | |
264 | } else if (matches(opt, "-brief") == 0) { | |
265 | ++brief; | |
266 | } else if (matches(opt, "-json") == 0) { | |
267 | ++json; | |
268 | } else if (matches(opt, "-pretty") == 0) { | |
269 | ++pretty; | |
270 | } else if (matches(opt, "-rcvbuf") == 0) { | |
271 | unsigned int size; | |
272 | ||
273 | argc--; | |
274 | argv++; | |
275 | if (argc <= 1) | |
276 | usage(); | |
277 | if (get_unsigned(&size, argv[1], 0)) { | |
278 | fprintf(stderr, "Invalid rcvbuf size '%s'\n", | |
279 | argv[1]); | |
280 | exit(-1); | |
281 | } | |
282 | rcvbuf = size; | |
283 | } else if (matches_color(opt, &color)) { | |
284 | } else if (matches(opt, "-help") == 0) { | |
285 | usage(); | |
286 | } else if (matches(opt, "-netns") == 0) { | |
287 | NEXT_ARG(); | |
288 | if (netns_switch(argv[1])) | |
289 | exit(-1); | |
290 | } else if (matches(opt, "-all") == 0) { | |
291 | do_all = true; | |
292 | } else { | |
293 | fprintf(stderr, | |
294 | "Option \"%s\" is unknown, try \"ip -help\".\n", | |
295 | opt); | |
296 | exit(-1); | |
297 | } | |
298 | argc--; argv++; | |
299 | } | |
300 | ||
301 | _SL_ = oneline ? "\\" : "\n"; | |
302 | ||
303 | check_enable_color(color, json); | |
304 | ||
305 | if (batch_file) | |
306 | return batch(batch_file); | |
307 | ||
308 | if (rtnl_open(&rth, 0) < 0) | |
309 | exit(1); | |
310 | ||
311 | rtnl_set_strict_dump(&rth); | |
312 | ||
313 | if (strlen(basename) > 2) | |
314 | return do_cmd(basename+2, argc, argv); | |
315 | ||
316 | if (argc > 1) | |
317 | return do_cmd(argv[1], argc-1, argv+1); | |
318 | ||
319 | rtnl_close(&rth); | |
320 | usage(); | |
321 | } |