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Commit | Line | Data |
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aba5acdf SH |
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> | |
aba5acdf SH |
10 | */ |
11 | ||
12 | #include <stdio.h> | |
13 | #include <stdlib.h> | |
14 | #include <unistd.h> | |
aba5acdf SH |
15 | #include <fcntl.h> |
16 | #include <sys/socket.h> | |
17 | #include <netinet/in.h> | |
18 | #include <string.h> | |
351efcde | 19 | #include <errno.h> |
aba5acdf | 20 | |
fbef6555 | 21 | #include "version.h" |
aba5acdf SH |
22 | #include "utils.h" |
23 | #include "ip_common.h" | |
52700d40 | 24 | #include "namespace.h" |
d7bd2db5 | 25 | #include "color.h" |
31f45088 | 26 | #include "rt_names.h" |
503e9229 | 27 | #include "bpf_util.h" |
aba5acdf | 28 | |
d7190d4c SR |
29 | #ifndef LIBDIR |
30 | #define LIBDIR "/usr/lib" | |
31 | #endif | |
32 | ||
aba5acdf | 33 | int preferred_family = AF_UNSPEC; |
ec7aff5c SH |
34 | int human_readable; |
35 | int use_iec; | |
36 | int show_stats; | |
37 | int show_details; | |
ec7aff5c | 38 | int oneline; |
5d295bb8 | 39 | int brief; |
5df60772 | 40 | int json; |
ec7aff5c | 41 | int timestamp; |
ec7aff5c | 42 | int force; |
64c79560 | 43 | int max_flush_loops = 10; |
ec7aff5c SH |
44 | int batch_mode; |
45 | bool do_all; | |
64c79560 | 46 | |
3bfa73ff | 47 | struct rtnl_handle rth = { .fd = -1 }; |
aba5acdf | 48 | |
d7190d4c SR |
49 | const char *get_ip_lib_dir(void) |
50 | { | |
51 | const char *lib_dir; | |
52 | ||
53 | lib_dir = getenv("IP_LIB_DIR"); | |
54 | if (!lib_dir) | |
55 | lib_dir = LIBDIR "/ip"; | |
56 | ||
57 | return lib_dir; | |
58 | } | |
59 | ||
aba5acdf SH |
60 | static void usage(void) __attribute__((noreturn)); |
61 | ||
62 | static void usage(void) | |
63 | { | |
64 | fprintf(stderr, | |
8589eb4e MC |
65 | "Usage: ip [ OPTIONS ] OBJECT { COMMAND | help }\n" |
66 | " ip [ -force ] -batch filename\n" | |
67 | "where OBJECT := { link | address | addrlabel | route | rule | neigh | ntable |\n" | |
68 | " tunnel | tuntap | maddress | mroute | mrule | monitor | xfrm |\n" | |
69 | " netns | l2tp | fou | macsec | tcp_metrics | token | netconf | ila |\n" | |
7e0767cd | 70 | " vrf | sr | nexthop | mptcp }\n" |
8589eb4e MC |
71 | " OPTIONS := { -V[ersion] | -s[tatistics] | -d[etails] | -r[esolve] |\n" |
72 | " -h[uman-readable] | -iec | -j[son] | -p[retty] |\n" | |
73 | " -f[amily] { inet | inet6 | mpls | bridge | link } |\n" | |
74 | " -4 | -6 | -I | -D | -M | -B | -0 |\n" | |
75 | " -l[oops] { maximum-addr-flush-attempts } | -br[ief] |\n" | |
76 | " -o[neline] | -t[imestamp] | -ts[hort] | -b[atch] [filename] |\n" | |
ca697cee HL |
77 | " -rc[vbuf] [size] | -n[etns] name | -N[umeric] | -a[ll] |\n" |
78 | " -c[olor]}\n"); | |
aba5acdf SH |
79 | exit(-1); |
80 | } | |
81 | ||
fc57a9df SH |
82 | static int do_help(int argc, char **argv) |
83 | { | |
84 | usage(); | |
ec7aff5c | 85 | return 0; |
fc57a9df SH |
86 | } |
87 | ||
351efcde SH |
88 | static const struct cmd { |
89 | const char *cmd; | |
90 | int (*func)(int argc, char **argv); | |
91 | } cmds[] = { | |
4806867a | 92 | { "address", do_ipaddr }, |
4759758c | 93 | { "addrlabel", do_ipaddrlabel }, |
ede72396 | 94 | { "maddress", do_multiaddr }, |
351efcde SH |
95 | { "route", do_iproute }, |
96 | { "rule", do_iprule }, | |
ede72396 SH |
97 | { "neighbor", do_ipneigh }, |
98 | { "neighbour", do_ipneigh }, | |
09954dc6 SH |
99 | { "ntable", do_ipntable }, |
100 | { "ntbl", do_ipntable }, | |
351efcde | 101 | { "link", do_iplink }, |
5aa08f6b | 102 | { "l2tp", do_ipl2tp }, |
6928747b | 103 | { "fou", do_ipfou }, |
ec71cae0 | 104 | { "ila", do_ipila }, |
b26fc590 | 105 | { "macsec", do_ipmacsec }, |
351efcde | 106 | { "tunnel", do_iptunnel }, |
ede72396 | 107 | { "tunl", do_iptunnel }, |
580fbd88 DW |
108 | { "tuntap", do_iptuntap }, |
109 | { "tap", do_iptuntap }, | |
191b60bd | 110 | { "token", do_iptoken }, |
ea63a69b | 111 | { "tcpmetrics", do_tcp_metrics }, |
ec7aff5c | 112 | { "tcp_metrics", do_tcp_metrics }, |
351efcde SH |
113 | { "monitor", do_ipmonitor }, |
114 | { "xfrm", do_xfrm }, | |
84616f83 | 115 | { "mroute", do_multiroute }, |
b6c8e808 | 116 | { "mrule", do_multirule }, |
0dc34c77 | 117 | { "netns", do_netns }, |
9d0efc10 | 118 | { "netconf", do_ipnetconf }, |
1949f82c | 119 | { "vrf", do_ipvrf}, |
93863328 | 120 | { "sr", do_seg6 }, |
63df8e85 | 121 | { "nexthop", do_ipnh }, |
7e0767cd | 122 | { "mptcp", do_mptcp }, |
fc57a9df | 123 | { "help", do_help }, |
351efcde SH |
124 | { 0 } |
125 | }; | |
126 | ||
127 | static int do_cmd(const char *argv0, int argc, char **argv) | |
128 | { | |
e25d6970 | 129 | const struct cmd *c; |
351efcde | 130 | |
ede72396 | 131 | for (c = cmds; c->cmd; ++c) { |
ec7aff5c | 132 | if (matches(argv0, c->cmd) == 0) |
7397944d | 133 | return -(c->func(argc-1, argv+1)); |
ede72396 SH |
134 | } |
135 | ||
351efcde | 136 | fprintf(stderr, "Object \"%s\" is unknown, try \"ip help\".\n", argv0); |
7397944d | 137 | return EXIT_FAILURE; |
351efcde SH |
138 | } |
139 | ||
1d9a81b8 | 140 | static int ip_batch_cmd(int argc, char *argv[], void *data) |
351efcde | 141 | { |
1d9a81b8 | 142 | const int *orig_family = data; |
351efcde | 143 | |
1d9a81b8 PM |
144 | preferred_family = *orig_family; |
145 | return do_cmd(argv[0], argc, argv); | |
146 | } | |
a3aa47a5 | 147 | |
1d9a81b8 PM |
148 | static int batch(const char *name) |
149 | { | |
150 | int orig_family = preferred_family; | |
151 | int ret; | |
351efcde SH |
152 | |
153 | if (rtnl_open(&rth, 0) < 0) { | |
154 | fprintf(stderr, "Cannot open rtnetlink\n"); | |
7397944d | 155 | return EXIT_FAILURE; |
351efcde SH |
156 | } |
157 | ||
1d9a81b8 | 158 | ret = do_batch(name, force, ip_batch_cmd, &orig_family); |
351efcde SH |
159 | |
160 | rtnl_close(&rth); | |
161 | return ret; | |
162 | } | |
163 | ||
aba5acdf SH |
164 | int main(int argc, char **argv) |
165 | { | |
503e9229 | 166 | const char *libbpf_version; |
a3aa47a5 | 167 | char *batch_file = NULL; |
503e9229 | 168 | char *basename; |
1ca4341d | 169 | int color = 0; |
aba5acdf | 170 | |
ba2fc55b LB |
171 | /* to run vrf exec without root, capabilities might be set, drop them |
172 | * if not needed as the first thing. | |
173 | * execv will drop them for the child command. | |
174 | * vrf exec requires: | |
175 | * - cap_dac_override to create the cgroup subdir in /sys | |
176 | * - cap_sys_admin to load the BPF program | |
177 | * - cap_net_admin to set the socket into the cgroup | |
178 | */ | |
179 | if (argc < 3 || strcmp(argv[1], "vrf") != 0 || | |
180 | strcmp(argv[2], "exec") != 0) | |
181 | drop_cap(); | |
182 | ||
aba5acdf SH |
183 | basename = strrchr(argv[0], '/'); |
184 | if (basename == NULL) | |
185 | basename = argv[0]; | |
186 | else | |
187 | basename++; | |
ae665a52 | 188 | |
aba5acdf SH |
189 | while (argc > 1) { |
190 | char *opt = argv[1]; | |
ec7aff5c SH |
191 | |
192 | if (strcmp(opt, "--") == 0) { | |
aba5acdf SH |
193 | argc--; argv++; |
194 | break; | |
195 | } | |
196 | if (opt[0] != '-') | |
197 | break; | |
198 | if (opt[1] == '-') | |
199 | opt++; | |
64c79560 BG |
200 | if (matches(opt, "-loops") == 0) { |
201 | argc--; | |
202 | argv++; | |
203 | if (argc <= 1) | |
204 | usage(); | |
ec7aff5c SH |
205 | max_flush_loops = atoi(argv[1]); |
206 | } else if (matches(opt, "-family") == 0) { | |
aba5acdf SH |
207 | argc--; |
208 | argv++; | |
209 | if (argc <= 1) | |
210 | usage(); | |
45c90d19 | 211 | if (strcmp(argv[1], "help") == 0) |
aba5acdf SH |
212 | usage(); |
213 | else | |
45c90d19 EB |
214 | preferred_family = read_family(argv[1]); |
215 | if (preferred_family == AF_UNSPEC) | |
f1675d61 | 216 | invarg("invalid protocol family", argv[1]); |
aba5acdf SH |
217 | } else if (strcmp(opt, "-4") == 0) { |
218 | preferred_family = AF_INET; | |
219 | } else if (strcmp(opt, "-6") == 0) { | |
220 | preferred_family = AF_INET6; | |
221 | } else if (strcmp(opt, "-0") == 0) { | |
222 | preferred_family = AF_PACKET; | |
aba5acdf SH |
223 | } else if (strcmp(opt, "-D") == 0) { |
224 | preferred_family = AF_DECnet; | |
dacc5d41 EB |
225 | } else if (strcmp(opt, "-M") == 0) { |
226 | preferred_family = AF_MPLS; | |
27bca615 SH |
227 | } else if (strcmp(opt, "-B") == 0) { |
228 | preferred_family = AF_BRIDGE; | |
b68d9837 CH |
229 | } else if (matches(opt, "-human") == 0 || |
230 | matches(opt, "-human-readable") == 0) { | |
231 | ++human_readable; | |
1e264abc SH |
232 | } else if (matches(opt, "-iec") == 0) { |
233 | ++use_iec; | |
aba5acdf SH |
234 | } else if (matches(opt, "-stats") == 0 || |
235 | matches(opt, "-statistics") == 0) { | |
236 | ++show_stats; | |
1d934839 PM |
237 | } else if (matches(opt, "-details") == 0) { |
238 | ++show_details; | |
aba5acdf SH |
239 | } else if (matches(opt, "-resolve") == 0) { |
240 | ++resolve_hosts; | |
241 | } else if (matches(opt, "-oneline") == 0) { | |
242 | ++oneline; | |
90f93024 SH |
243 | } else if (matches(opt, "-timestamp") == 0) { |
244 | ++timestamp; | |
79aa79d0 VK |
245 | } else if (matches(opt, "-tshort") == 0) { |
246 | ++timestamp; | |
247 | ++timestamp_short; | |
aba5acdf | 248 | } else if (matches(opt, "-Version") == 0) { |
503e9229 HL |
249 | printf("ip utility, iproute2-%s", version); |
250 | libbpf_version = get_libbpf_version(); | |
251 | if (libbpf_version) | |
252 | printf(", libbpf %s", libbpf_version); | |
253 | printf("\n"); | |
aba5acdf | 254 | exit(0); |
351efcde SH |
255 | } else if (matches(opt, "-force") == 0) { |
256 | ++force; | |
257 | } else if (matches(opt, "-batch") == 0) { | |
258 | argc--; | |
259 | argv++; | |
260 | if (argc <= 1) | |
261 | usage(); | |
262 | batch_file = argv[1]; | |
5d295bb8 AG |
263 | } else if (matches(opt, "-brief") == 0) { |
264 | ++brief; | |
5df60772 JF |
265 | } else if (matches(opt, "-json") == 0) { |
266 | ++json; | |
a233caa0 | 267 | } else if (matches(opt, "-pretty") == 0) { |
54336567 | 268 | ++pretty; |
7f03191f PM |
269 | } else if (matches(opt, "-rcvbuf") == 0) { |
270 | unsigned int size; | |
271 | ||
272 | argc--; | |
273 | argv++; | |
274 | if (argc <= 1) | |
275 | usage(); | |
276 | if (get_unsigned(&size, argv[1], 0)) { | |
277 | fprintf(stderr, "Invalid rcvbuf size '%s'\n", | |
278 | argv[1]); | |
279 | exit(-1); | |
280 | } | |
281 | rcvbuf = size; | |
ff1ab8ed | 282 | } else if (matches_color(opt, &color)) { |
aba5acdf SH |
283 | } else if (matches(opt, "-help") == 0) { |
284 | usage(); | |
52700d40 VK |
285 | } else if (matches(opt, "-netns") == 0) { |
286 | NEXT_ARG(); | |
287 | if (netns_switch(argv[1])) | |
288 | exit(-1); | |
ca697cee HL |
289 | } else if (matches(opt, "-Numeric") == 0) { |
290 | ++numeric; | |
b13ba03f VK |
291 | } else if (matches(opt, "-all") == 0) { |
292 | do_all = true; | |
aba5acdf | 293 | } else { |
ec7aff5c SH |
294 | fprintf(stderr, |
295 | "Option \"%s\" is unknown, try \"ip -help\".\n", | |
296 | opt); | |
aba5acdf SH |
297 | exit(-1); |
298 | } | |
299 | argc--; argv++; | |
300 | } | |
301 | ||
ec7aff5c | 302 | _SL_ = oneline ? "\\" : "\n"; |
aba5acdf | 303 | |
4d82962c | 304 | check_enable_color(color, json); |
5df60772 | 305 | |
ae665a52 | 306 | if (batch_file) |
351efcde | 307 | return batch(batch_file); |
ae665a52 | 308 | |
351efcde SH |
309 | if (rtnl_open(&rth, 0) < 0) |
310 | exit(1); | |
311 | ||
aea41afc DA |
312 | rtnl_set_strict_dump(&rth); |
313 | ||
ae665a52 | 314 | if (strlen(basename) > 2) |
351efcde SH |
315 | return do_cmd(basename+2, argc, argv); |
316 | ||
ae665a52 | 317 | if (argc > 1) |
351efcde SH |
318 | return do_cmd(argv[1], argc-1, argv+1); |
319 | ||
320 | rtnl_close(&rth); | |
aba5acdf SH |
321 | usage(); |
322 | } |