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aba5acdf SH |
1 | /* |
2 | * ipmonitor.c "ip monitor". | |
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 | ||
13 | #include <stdio.h> | |
14 | #include <stdlib.h> | |
15 | #include <unistd.h> | |
aba5acdf SH |
16 | #include <fcntl.h> |
17 | #include <sys/socket.h> | |
18 | #include <netinet/in.h> | |
19 | #include <arpa/inet.h> | |
20 | #include <string.h> | |
21 | #include <time.h> | |
22 | ||
23 | #include "utils.h" | |
24 | #include "ip_common.h" | |
25 | ||
26 | static void usage(void) __attribute__((noreturn)); | |
4b6e07d8 | 27 | int prefix_banner; |
449b824a | 28 | int listen_all_nsid; |
aba5acdf SH |
29 | |
30 | static void usage(void) | |
31 | { | |
56f5daac | 32 | fprintf(stderr, "Usage: ip monitor [ all | LISTofOBJECTS ] [ FILE ] [ label ] [all-nsid] [dev DEVICE]\n"); |
cbe195dc | 33 | fprintf(stderr, "LISTofOBJECTS := link | address | route | mroute | prefix |\n"); |
d652ccbf | 34 | fprintf(stderr, " neigh | netconf | rule | nsid\n"); |
cbe195dc | 35 | fprintf(stderr, "FILE := file FILENAME\n"); |
aba5acdf SH |
36 | exit(-1); |
37 | } | |
38 | ||
449b824a | 39 | static void print_headers(FILE *fp, char *label, struct rtnl_ctrl_data *ctrl) |
3b0006f8 ND |
40 | { |
41 | if (timestamp) | |
42 | print_timestamp(fp); | |
43 | ||
449b824a ND |
44 | if (listen_all_nsid) { |
45 | if (ctrl == NULL || ctrl->nsid < 0) | |
46 | fprintf(fp, "[nsid current]"); | |
47 | else | |
48 | fprintf(fp, "[nsid %d]", ctrl->nsid); | |
49 | } | |
50 | ||
3b0006f8 ND |
51 | if (prefix_banner) |
52 | fprintf(fp, "%s", label); | |
53 | } | |
54 | ||
cd554f2c | 55 | static int accept_msg(struct rtnl_ctrl_data *ctrl, |
d1f28cf1 | 56 | struct nlmsghdr *n, void *arg) |
aba5acdf | 57 | { |
56f5daac | 58 | FILE *fp = (FILE *)arg; |
aba5acdf | 59 | |
40443f49 SH |
60 | switch (n->nlmsg_type) { |
61 | case RTM_NEWROUTE: | |
62 | case RTM_DELROUTE: { | |
e34d3dcc ND |
63 | struct rtmsg *r = NLMSG_DATA(n); |
64 | int len = n->nlmsg_len - NLMSG_LENGTH(sizeof(*r)); | |
65 | ||
66 | if (len < 0) { | |
67 | fprintf(stderr, "BUG: wrong nlmsg len %d\n", len); | |
68 | return -1; | |
69 | } | |
70 | ||
2271779d | 71 | if (r->rtm_flags & RTM_F_CLONED) |
72 | return 0; | |
73 | ||
e34d3dcc ND |
74 | if (r->rtm_family == RTNL_FAMILY_IPMR || |
75 | r->rtm_family == RTNL_FAMILY_IP6MR) { | |
449b824a | 76 | print_headers(fp, "[MROUTE]", ctrl); |
cd554f2c | 77 | print_mroute(n, arg); |
e34d3dcc ND |
78 | return 0; |
79 | } else { | |
449b824a | 80 | print_headers(fp, "[ROUTE]", ctrl); |
cd554f2c | 81 | print_route(n, arg); |
e34d3dcc ND |
82 | return 0; |
83 | } | |
aba5acdf | 84 | } |
2271779d | 85 | |
40443f49 SH |
86 | case RTM_NEWLINK: |
87 | case RTM_DELLINK: | |
cd554f2c | 88 | ll_remember_index(n, NULL); |
449b824a | 89 | print_headers(fp, "[LINK]", ctrl); |
cd554f2c | 90 | print_linkinfo(n, arg); |
aba5acdf | 91 | return 0; |
40443f49 SH |
92 | |
93 | case RTM_NEWADDR: | |
94 | case RTM_DELADDR: | |
449b824a | 95 | print_headers(fp, "[ADDR]", ctrl); |
cd554f2c | 96 | print_addrinfo(n, arg); |
aba5acdf | 97 | return 0; |
40443f49 SH |
98 | |
99 | case RTM_NEWADDRLABEL: | |
100 | case RTM_DELADDRLABEL: | |
449b824a | 101 | print_headers(fp, "[ADDRLABEL]", ctrl); |
cd554f2c | 102 | print_addrlabel(n, arg); |
4759758c | 103 | return 0; |
40443f49 SH |
104 | |
105 | case RTM_NEWNEIGH: | |
106 | case RTM_DELNEIGH: | |
107 | case RTM_GETNEIGH: | |
00185653 SH |
108 | if (preferred_family) { |
109 | struct ndmsg *r = NLMSG_DATA(n); | |
110 | ||
111 | if (r->ndm_family != preferred_family) | |
112 | return 0; | |
113 | } | |
114 | ||
449b824a | 115 | print_headers(fp, "[NEIGH]", ctrl); |
cd554f2c | 116 | print_neigh(n, arg); |
aba5acdf | 117 | return 0; |
40443f49 SH |
118 | |
119 | case RTM_NEWPREFIX: | |
449b824a | 120 | print_headers(fp, "[PREFIX]", ctrl); |
cd554f2c | 121 | print_prefix(n, arg); |
1cb54e58 | 122 | return 0; |
40443f49 SH |
123 | |
124 | case RTM_NEWRULE: | |
125 | case RTM_DELRULE: | |
449b824a | 126 | print_headers(fp, "[RULE]", ctrl); |
cd554f2c | 127 | print_rule(n, arg); |
98bde989 | 128 | return 0; |
40443f49 SH |
129 | |
130 | case NLMSG_TSTAMP: | |
131 | print_nlmsg_timestamp(fp, n); | |
132 | return 0; | |
133 | ||
134 | case RTM_NEWNETCONF: | |
e09d21f6 | 135 | case RTM_DELNETCONF: |
449b824a | 136 | print_headers(fp, "[NETCONF]", ctrl); |
cd554f2c | 137 | print_netconf(ctrl, n, arg); |
9d0efc10 | 138 | return 0; |
40443f49 SH |
139 | |
140 | case RTM_DELNSID: | |
141 | case RTM_NEWNSID: | |
449b824a | 142 | print_headers(fp, "[NSID]", ctrl); |
cd554f2c | 143 | print_nsid(n, arg); |
d652ccbf | 144 | return 0; |
40443f49 SH |
145 | |
146 | case NLMSG_ERROR: | |
147 | case NLMSG_NOOP: | |
148 | case NLMSG_DONE: | |
149 | break; /* ignore */ | |
150 | ||
151 | default: | |
152 | fprintf(stderr, | |
153 | "Unknown message: type=0x%08x(%d) flags=0x%08x(%d) len=0x%08x(%d)\n", | |
56f5daac | 154 | n->nlmsg_type, n->nlmsg_type, |
40aadf8b | 155 | n->nlmsg_flags, n->nlmsg_flags, n->nlmsg_len, |
156 | n->nlmsg_len); | |
aba5acdf SH |
157 | } |
158 | return 0; | |
159 | } | |
160 | ||
161 | int do_ipmonitor(int argc, char **argv) | |
162 | { | |
aba5acdf | 163 | char *file = NULL; |
56f5daac SH |
164 | unsigned int groups = 0; |
165 | int llink = 0; | |
166 | int laddr = 0; | |
167 | int lroute = 0; | |
168 | int lmroute = 0; | |
169 | int lprefix = 0; | |
170 | int lneigh = 0; | |
171 | int lnetconf = 0; | |
172 | int lrule = 0; | |
173 | int lnsid = 0; | |
174 | int ifindex = 0; | |
aba5acdf | 175 | |
6fcabac5 | 176 | groups |= nl_mgrp(RTNLGRP_LINK); |
177 | groups |= nl_mgrp(RTNLGRP_IPV4_IFADDR); | |
178 | groups |= nl_mgrp(RTNLGRP_IPV6_IFADDR); | |
179 | groups |= nl_mgrp(RTNLGRP_IPV4_ROUTE); | |
180 | groups |= nl_mgrp(RTNLGRP_IPV6_ROUTE); | |
dacc5d41 | 181 | groups |= nl_mgrp(RTNLGRP_MPLS_ROUTE); |
6fcabac5 | 182 | groups |= nl_mgrp(RTNLGRP_IPV4_MROUTE); |
183 | groups |= nl_mgrp(RTNLGRP_IPV6_MROUTE); | |
184 | groups |= nl_mgrp(RTNLGRP_IPV6_PREFIX); | |
185 | groups |= nl_mgrp(RTNLGRP_NEIGH); | |
186 | groups |= nl_mgrp(RTNLGRP_IPV4_NETCONF); | |
187 | groups |= nl_mgrp(RTNLGRP_IPV6_NETCONF); | |
2dd5909d ND |
188 | groups |= nl_mgrp(RTNLGRP_IPV4_RULE); |
189 | groups |= nl_mgrp(RTNLGRP_IPV6_RULE); | |
d652ccbf | 190 | groups |= nl_mgrp(RTNLGRP_NSID); |
76f7d89d | 191 | groups |= nl_mgrp(RTNLGRP_MPLS_NETCONF); |
6fcabac5 | 192 | |
fc57a9df | 193 | rtnl_close(&rth); |
aba5acdf SH |
194 | |
195 | while (argc > 0) { | |
196 | if (matches(*argv, "file") == 0) { | |
197 | NEXT_ARG(); | |
198 | file = *argv; | |
488c41d2 MS |
199 | } else if (matches(*argv, "label") == 0) { |
200 | prefix_banner = 1; | |
aba5acdf | 201 | } else if (matches(*argv, "link") == 0) { |
56f5daac | 202 | llink = 1; |
aba5acdf SH |
203 | groups = 0; |
204 | } else if (matches(*argv, "address") == 0) { | |
56f5daac | 205 | laddr = 1; |
aba5acdf SH |
206 | groups = 0; |
207 | } else if (matches(*argv, "route") == 0) { | |
56f5daac | 208 | lroute = 1; |
aba5acdf | 209 | groups = 0; |
e34d3dcc | 210 | } else if (matches(*argv, "mroute") == 0) { |
56f5daac | 211 | lmroute = 1; |
e34d3dcc | 212 | groups = 0; |
1cb54e58 | 213 | } else if (matches(*argv, "prefix") == 0) { |
56f5daac | 214 | lprefix = 1; |
1cb54e58 | 215 | groups = 0; |
fb063322 | 216 | } else if (matches(*argv, "neigh") == 0) { |
6cdbf370 AH |
217 | lneigh = 1; |
218 | groups = 0; | |
9d0efc10 ND |
219 | } else if (matches(*argv, "netconf") == 0) { |
220 | lnetconf = 1; | |
221 | groups = 0; | |
2dd5909d ND |
222 | } else if (matches(*argv, "rule") == 0) { |
223 | lrule = 1; | |
224 | groups = 0; | |
d652ccbf ND |
225 | } else if (matches(*argv, "nsid") == 0) { |
226 | lnsid = 1; | |
227 | groups = 0; | |
aba5acdf | 228 | } else if (strcmp(*argv, "all") == 0) { |
56f5daac | 229 | prefix_banner = 1; |
a9390c92 RP |
230 | } else if (matches(*argv, "all-nsid") == 0) { |
231 | listen_all_nsid = 1; | |
aba5acdf SH |
232 | } else if (matches(*argv, "help") == 0) { |
233 | usage(); | |
093b7646 | 234 | } else if (strcmp(*argv, "dev") == 0) { |
235 | NEXT_ARG(); | |
236 | ||
237 | ifindex = ll_name_to_index(*argv); | |
238 | if (!ifindex) | |
239 | invarg("Device does not exist\n", *argv); | |
aba5acdf SH |
240 | } else { |
241 | fprintf(stderr, "Argument \"%s\" is unknown, try \"ip monitor help\".\n", *argv); | |
242 | exit(-1); | |
243 | } | |
244 | argc--; argv++; | |
245 | } | |
246 | ||
093b7646 | 247 | ipaddr_reset_filter(1, ifindex); |
248 | iproute_reset_filter(ifindex); | |
249 | ipmroute_reset_filter(ifindex); | |
250 | ipneigh_reset_filter(ifindex); | |
251 | ipnetconf_reset_filter(ifindex); | |
252 | ||
aba5acdf | 253 | if (llink) |
b64f58b0 | 254 | groups |= nl_mgrp(RTNLGRP_LINK); |
aba5acdf SH |
255 | if (laddr) { |
256 | if (!preferred_family || preferred_family == AF_INET) | |
b64f58b0 | 257 | groups |= nl_mgrp(RTNLGRP_IPV4_IFADDR); |
aba5acdf | 258 | if (!preferred_family || preferred_family == AF_INET6) |
b64f58b0 | 259 | groups |= nl_mgrp(RTNLGRP_IPV6_IFADDR); |
aba5acdf SH |
260 | } |
261 | if (lroute) { | |
262 | if (!preferred_family || preferred_family == AF_INET) | |
b64f58b0 | 263 | groups |= nl_mgrp(RTNLGRP_IPV4_ROUTE); |
aba5acdf | 264 | if (!preferred_family || preferred_family == AF_INET6) |
b64f58b0 | 265 | groups |= nl_mgrp(RTNLGRP_IPV6_ROUTE); |
dacc5d41 EB |
266 | if (!preferred_family || preferred_family == AF_MPLS) |
267 | groups |= nl_mgrp(RTNLGRP_MPLS_ROUTE); | |
aba5acdf | 268 | } |
e34d3dcc ND |
269 | if (lmroute) { |
270 | if (!preferred_family || preferred_family == AF_INET) | |
271 | groups |= nl_mgrp(RTNLGRP_IPV4_MROUTE); | |
272 | if (!preferred_family || preferred_family == AF_INET6) | |
273 | groups |= nl_mgrp(RTNLGRP_IPV6_MROUTE); | |
274 | } | |
1cb54e58 | 275 | if (lprefix) { |
276 | if (!preferred_family || preferred_family == AF_INET6) | |
b64f58b0 | 277 | groups |= nl_mgrp(RTNLGRP_IPV6_PREFIX); |
1cb54e58 | 278 | } |
fb063322 VC |
279 | if (lneigh) { |
280 | groups |= nl_mgrp(RTNLGRP_NEIGH); | |
281 | } | |
9d0efc10 ND |
282 | if (lnetconf) { |
283 | if (!preferred_family || preferred_family == AF_INET) | |
284 | groups |= nl_mgrp(RTNLGRP_IPV4_NETCONF); | |
285 | if (!preferred_family || preferred_family == AF_INET6) | |
286 | groups |= nl_mgrp(RTNLGRP_IPV6_NETCONF); | |
76f7d89d DA |
287 | if (!preferred_family || preferred_family == AF_MPLS) |
288 | groups |= nl_mgrp(RTNLGRP_MPLS_NETCONF); | |
9d0efc10 | 289 | } |
2dd5909d ND |
290 | if (lrule) { |
291 | if (!preferred_family || preferred_family == AF_INET) | |
292 | groups |= nl_mgrp(RTNLGRP_IPV4_RULE); | |
293 | if (!preferred_family || preferred_family == AF_INET6) | |
294 | groups |= nl_mgrp(RTNLGRP_IPV6_RULE); | |
295 | } | |
d652ccbf ND |
296 | if (lnsid) { |
297 | groups |= nl_mgrp(RTNLGRP_NSID); | |
298 | } | |
aba5acdf SH |
299 | if (file) { |
300 | FILE *fp; | |
e49b51d6 SH |
301 | int err; |
302 | ||
aba5acdf SH |
303 | fp = fopen(file, "r"); |
304 | if (fp == NULL) { | |
305 | perror("Cannot fopen"); | |
306 | exit(-1); | |
307 | } | |
e49b51d6 SH |
308 | err = rtnl_from_file(fp, accept_msg, stdout); |
309 | fclose(fp); | |
310 | return err; | |
aba5acdf SH |
311 | } |
312 | ||
fc57a9df SH |
313 | if (rtnl_open(&rth, groups) < 0) |
314 | exit(1); | |
449b824a ND |
315 | if (listen_all_nsid && rtnl_listen_all_nsid(&rth) < 0) |
316 | exit(1); | |
317 | ||
aba5acdf | 318 | ll_init_map(&rth); |
e29a8e05 | 319 | netns_nsid_socket_init(); |
d652ccbf | 320 | netns_map_init(); |
aba5acdf | 321 | |
fc57a9df | 322 | if (rtnl_listen(&rth, accept_msg, stdout) < 0) |
aba5acdf SH |
323 | exit(2); |
324 | ||
351efcde | 325 | return 0; |
aba5acdf | 326 | } |