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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> | |
16 | #include <syslog.h> | |
17 | #include <fcntl.h> | |
18 | #include <sys/socket.h> | |
19 | #include <sys/time.h> | |
20 | #include <net/if.h> | |
21 | #include <netinet/in.h> | |
22 | #include <string.h> | |
23 | ||
24 | #include "SNAPSHOT.h" | |
25 | ||
26 | #include "utils.h" | |
27 | #include "libnetlink.h" | |
28 | ||
29 | int resolve_hosts = 0; | |
30 | static int init_phase = 1; | |
31 | ||
32 | static void write_stamp(FILE *fp) | |
33 | { | |
34 | char buf[128]; | |
35 | struct nlmsghdr *n1 = (void*)buf; | |
36 | struct timeval tv; | |
37 | ||
38 | n1->nlmsg_type = 15; | |
39 | n1->nlmsg_flags = 0; | |
40 | n1->nlmsg_seq = 0; | |
41 | n1->nlmsg_pid = 0; | |
42 | n1->nlmsg_len = NLMSG_LENGTH(4*2); | |
43 | gettimeofday(&tv, NULL); | |
44 | ((__u32*)NLMSG_DATA(n1))[0] = tv.tv_sec; | |
45 | ((__u32*)NLMSG_DATA(n1))[1] = tv.tv_usec; | |
46 | fwrite((void*)n1, 1, NLMSG_ALIGN(n1->nlmsg_len), fp); | |
47 | } | |
48 | ||
ae665a52 | 49 | static int dump_msg(const struct sockaddr_nl *who, struct nlmsghdr *n, |
6dc9f016 | 50 | void *arg) |
aba5acdf SH |
51 | { |
52 | FILE *fp = (FILE*)arg; | |
53 | if (!init_phase) | |
54 | write_stamp(fp); | |
55 | fwrite((void*)n, 1, NLMSG_ALIGN(n->nlmsg_len), fp); | |
56 | fflush(fp); | |
57 | return 0; | |
58 | } | |
59 | ||
60 | void usage(void) | |
61 | { | |
62 | fprintf(stderr, "Usage: rtmon file FILE [ all | LISTofOBJECTS]\n"); | |
63 | fprintf(stderr, "LISTofOBJECTS := [ link ] [ address ] [ route ]\n"); | |
64 | exit(-1); | |
65 | } | |
66 | ||
67 | int | |
68 | main(int argc, char **argv) | |
69 | { | |
70 | FILE *fp; | |
71 | struct rtnl_handle rth; | |
72 | int family = AF_UNSPEC; | |
73 | unsigned groups = ~0U; | |
74 | int llink = 0; | |
75 | int laddr = 0; | |
76 | int lroute = 0; | |
77 | char *file = NULL; | |
78 | ||
79 | while (argc > 1) { | |
80 | if (matches(argv[1], "-family") == 0) { | |
81 | argc--; | |
82 | argv++; | |
83 | if (argc <= 1) | |
84 | usage(); | |
85 | if (strcmp(argv[1], "inet") == 0) | |
86 | family = AF_INET; | |
87 | else if (strcmp(argv[1], "inet6") == 0) | |
88 | family = AF_INET6; | |
89 | else if (strcmp(argv[1], "link") == 0) | |
90 | family = AF_INET6; | |
91 | else if (strcmp(argv[1], "help") == 0) | |
92 | usage(); | |
93 | else { | |
94 | fprintf(stderr, "Protocol ID \"%s\" is unknown, try \"rtmon help\".\n", argv[1]); | |
95 | exit(-1); | |
96 | } | |
97 | } else if (strcmp(argv[1], "-4") == 0) { | |
98 | family = AF_INET; | |
99 | } else if (strcmp(argv[1], "-6") == 0) { | |
100 | family = AF_INET6; | |
101 | } else if (strcmp(argv[1], "-0") == 0) { | |
102 | family = AF_PACKET; | |
103 | } else if (matches(argv[1], "-Version") == 0) { | |
104 | printf("rtmon utility, iproute2-ss%s\n", SNAPSHOT); | |
105 | exit(0); | |
106 | } else if (matches(argv[1], "file") == 0) { | |
107 | argc--; | |
108 | argv++; | |
109 | if (argc <= 1) | |
110 | usage(); | |
111 | file = argv[1]; | |
112 | } else if (matches(argv[1], "link") == 0) { | |
113 | llink=1; | |
114 | groups = 0; | |
115 | } else if (matches(argv[1], "address") == 0) { | |
116 | laddr=1; | |
117 | groups = 0; | |
118 | } else if (matches(argv[1], "route") == 0) { | |
119 | lroute=1; | |
120 | groups = 0; | |
121 | } else if (strcmp(argv[1], "all") == 0) { | |
122 | groups = ~0U; | |
123 | } else if (matches(argv[1], "help") == 0) { | |
124 | usage(); | |
125 | } else { | |
126 | fprintf(stderr, "Argument \"%s\" is unknown, try \"rtmon help\".\n", argv[1]); | |
127 | exit(-1); | |
128 | } | |
129 | argc--; argv++; | |
130 | } | |
131 | ||
132 | if (file == NULL) { | |
133 | fprintf(stderr, "Not enough information: argument \"file\" is required\n"); | |
134 | exit(-1); | |
135 | } | |
136 | if (llink) | |
137 | groups |= RTMGRP_LINK; | |
138 | if (laddr) { | |
139 | if (!family || family == AF_INET) | |
140 | groups |= RTMGRP_IPV4_IFADDR; | |
141 | if (!family || family == AF_INET6) | |
142 | groups |= RTMGRP_IPV6_IFADDR; | |
143 | } | |
144 | if (lroute) { | |
145 | if (!family || family == AF_INET) | |
146 | groups |= RTMGRP_IPV4_ROUTE; | |
147 | if (!family || family == AF_INET6) | |
148 | groups |= RTMGRP_IPV6_ROUTE; | |
149 | } | |
150 | ||
151 | fp = fopen(file, "w"); | |
152 | if (fp == NULL) { | |
153 | perror("Cannot fopen"); | |
154 | exit(-1); | |
155 | } | |
156 | ||
157 | if (rtnl_open(&rth, groups) < 0) | |
158 | exit(1); | |
159 | ||
160 | if (rtnl_wilddump_request(&rth, AF_UNSPEC, RTM_GETLINK) < 0) { | |
161 | perror("Cannot send dump request"); | |
162 | exit(1); | |
163 | } | |
164 | ||
165 | write_stamp(fp); | |
166 | ||
167 | if (rtnl_dump_filter(&rth, dump_msg, fp, NULL, NULL) < 0) { | |
168 | fprintf(stderr, "Dump terminated\n"); | |
169 | return 1; | |
170 | } | |
171 | ||
172 | init_phase = 0; | |
173 | ||
174 | if (rtnl_listen(&rth, dump_msg, (void*)fp) < 0) | |
175 | exit(2); | |
176 | ||
177 | exit(0); | |
178 | } |