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aba5acdf SH |
1 | /* |
2 | * rtmon.c RTnetlink listener. | |
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 <sys/time.h> | |
aba5acdf SH |
19 | #include <netinet/in.h> |
20 | #include <string.h> | |
21 | ||
22 | #include "SNAPSHOT.h" | |
23 | ||
24 | #include "utils.h" | |
25 | #include "libnetlink.h" | |
26 | ||
aba5acdf SH |
27 | static int init_phase = 1; |
28 | ||
29 | static void write_stamp(FILE *fp) | |
30 | { | |
31 | char buf[128]; | |
56f5daac | 32 | struct nlmsghdr *n1 = (void *)buf; |
aba5acdf SH |
33 | struct timeval tv; |
34 | ||
27b14f2e | 35 | n1->nlmsg_type = NLMSG_TSTAMP; |
aba5acdf SH |
36 | n1->nlmsg_flags = 0; |
37 | n1->nlmsg_seq = 0; | |
38 | n1->nlmsg_pid = 0; | |
39 | n1->nlmsg_len = NLMSG_LENGTH(4*2); | |
40 | gettimeofday(&tv, NULL); | |
56f5daac SH |
41 | ((__u32 *)NLMSG_DATA(n1))[0] = tv.tv_sec; |
42 | ((__u32 *)NLMSG_DATA(n1))[1] = tv.tv_usec; | |
43 | fwrite((void *)n1, 1, NLMSG_ALIGN(n1->nlmsg_len), fp); | |
aba5acdf SH |
44 | } |
45 | ||
cd554f2c | 46 | static int dump_msg(struct rtnl_ctrl_data *ctrl, |
0628cddd | 47 | struct nlmsghdr *n, void *arg) |
aba5acdf | 48 | { |
56f5daac SH |
49 | FILE *fp = (FILE *)arg; |
50 | ||
aba5acdf SH |
51 | if (!init_phase) |
52 | write_stamp(fp); | |
56f5daac | 53 | fwrite((void *)n, 1, NLMSG_ALIGN(n->nlmsg_len), fp); |
aba5acdf SH |
54 | fflush(fp); |
55 | return 0; | |
56 | } | |
57 | ||
cd554f2c | 58 | static int dump_msg2(struct nlmsghdr *n, void *arg) |
0628cddd | 59 | { |
cd554f2c | 60 | return dump_msg(NULL, n, arg); |
0628cddd ND |
61 | } |
62 | ||
d1f28cf1 | 63 | static void usage(void) |
aba5acdf | 64 | { |
8589eb4e MC |
65 | fprintf(stderr, |
66 | "Usage: rtmon [ OPTIONS ] file FILE [ all | LISTofOBJECTS ]\n" | |
67 | "OPTIONS := { -f[amily] { inet | inet6 | link | help } |\n" | |
68 | " -4 | -6 | -0 | -V[ersion] }\n" | |
69 | "LISTofOBJECTS := [ link ] [ address ] [ route ]\n"); | |
aba5acdf SH |
70 | exit(-1); |
71 | } | |
72 | ||
73 | int | |
74 | main(int argc, char **argv) | |
75 | { | |
76 | FILE *fp; | |
77 | struct rtnl_handle rth; | |
78 | int family = AF_UNSPEC; | |
56f5daac | 79 | unsigned int groups = ~0U; |
aba5acdf SH |
80 | int llink = 0; |
81 | int laddr = 0; | |
82 | int lroute = 0; | |
83 | char *file = NULL; | |
84 | ||
85 | while (argc > 1) { | |
86 | if (matches(argv[1], "-family") == 0) { | |
87 | argc--; | |
88 | argv++; | |
89 | if (argc <= 1) | |
90 | usage(); | |
91 | if (strcmp(argv[1], "inet") == 0) | |
92 | family = AF_INET; | |
93 | else if (strcmp(argv[1], "inet6") == 0) | |
94 | family = AF_INET6; | |
95 | else if (strcmp(argv[1], "link") == 0) | |
96 | family = AF_INET6; | |
97 | else if (strcmp(argv[1], "help") == 0) | |
98 | usage(); | |
99 | else { | |
100 | fprintf(stderr, "Protocol ID \"%s\" is unknown, try \"rtmon help\".\n", argv[1]); | |
101 | exit(-1); | |
102 | } | |
103 | } else if (strcmp(argv[1], "-4") == 0) { | |
104 | family = AF_INET; | |
105 | } else if (strcmp(argv[1], "-6") == 0) { | |
106 | family = AF_INET6; | |
107 | } else if (strcmp(argv[1], "-0") == 0) { | |
108 | family = AF_PACKET; | |
109 | } else if (matches(argv[1], "-Version") == 0) { | |
110 | printf("rtmon utility, iproute2-ss%s\n", SNAPSHOT); | |
111 | exit(0); | |
112 | } else if (matches(argv[1], "file") == 0) { | |
113 | argc--; | |
114 | argv++; | |
115 | if (argc <= 1) | |
116 | usage(); | |
117 | file = argv[1]; | |
118 | } else if (matches(argv[1], "link") == 0) { | |
56f5daac | 119 | llink = 1; |
aba5acdf SH |
120 | groups = 0; |
121 | } else if (matches(argv[1], "address") == 0) { | |
56f5daac | 122 | laddr = 1; |
aba5acdf SH |
123 | groups = 0; |
124 | } else if (matches(argv[1], "route") == 0) { | |
56f5daac | 125 | lroute = 1; |
aba5acdf SH |
126 | groups = 0; |
127 | } else if (strcmp(argv[1], "all") == 0) { | |
128 | groups = ~0U; | |
129 | } else if (matches(argv[1], "help") == 0) { | |
130 | usage(); | |
131 | } else { | |
132 | fprintf(stderr, "Argument \"%s\" is unknown, try \"rtmon help\".\n", argv[1]); | |
133 | exit(-1); | |
134 | } | |
135 | argc--; argv++; | |
136 | } | |
137 | ||
138 | if (file == NULL) { | |
139 | fprintf(stderr, "Not enough information: argument \"file\" is required\n"); | |
140 | exit(-1); | |
141 | } | |
142 | if (llink) | |
b64f58b0 | 143 | groups |= nl_mgrp(RTNLGRP_LINK); |
aba5acdf SH |
144 | if (laddr) { |
145 | if (!family || family == AF_INET) | |
b64f58b0 | 146 | groups |= nl_mgrp(RTNLGRP_IPV4_IFADDR); |
aba5acdf | 147 | if (!family || family == AF_INET6) |
b64f58b0 | 148 | groups |= nl_mgrp(RTNLGRP_IPV6_IFADDR); |
aba5acdf SH |
149 | } |
150 | if (lroute) { | |
151 | if (!family || family == AF_INET) | |
b64f58b0 | 152 | groups |= nl_mgrp(RTNLGRP_IPV4_ROUTE); |
aba5acdf | 153 | if (!family || family == AF_INET6) |
b64f58b0 | 154 | groups |= nl_mgrp(RTNLGRP_IPV6_ROUTE); |
aba5acdf SH |
155 | } |
156 | ||
157 | fp = fopen(file, "w"); | |
158 | if (fp == NULL) { | |
159 | perror("Cannot fopen"); | |
160 | exit(-1); | |
161 | } | |
162 | ||
163 | if (rtnl_open(&rth, groups) < 0) | |
164 | exit(1); | |
165 | ||
31ae2912 | 166 | if (rtnl_linkdump_req(&rth, AF_UNSPEC) < 0) { |
aba5acdf SH |
167 | perror("Cannot send dump request"); |
168 | exit(1); | |
169 | } | |
170 | ||
171 | write_stamp(fp); | |
172 | ||
0628cddd | 173 | if (rtnl_dump_filter(&rth, dump_msg2, fp) < 0) { |
aba5acdf SH |
174 | fprintf(stderr, "Dump terminated\n"); |
175 | return 1; | |
176 | } | |
177 | ||
178 | init_phase = 0; | |
179 | ||
56f5daac | 180 | if (rtnl_listen(&rth, dump_msg, (void *)fp) < 0) |
aba5acdf SH |
181 | exit(2); |
182 | ||
183 | exit(0); | |
184 | } |