2 * rtmon.c RTnetlink listener.
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.
9 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
18 #include <sys/socket.h>
20 #include <netinet/in.h>
26 #include "libnetlink.h"
28 int resolve_hosts = 0;
29 static int init_phase = 1;
31 static void write_stamp(FILE *fp)
34 struct nlmsghdr *n1 = (void*)buf;
41 n1->nlmsg_len = NLMSG_LENGTH(4*2);
42 gettimeofday(&tv, NULL);
43 ((__u32*)NLMSG_DATA(n1))[0] = tv.tv_sec;
44 ((__u32*)NLMSG_DATA(n1))[1] = tv.tv_usec;
45 fwrite((void*)n1, 1, NLMSG_ALIGN(n1->nlmsg_len), fp);
48 static int dump_msg(const struct sockaddr_nl *who, struct nlmsghdr *n,
51 FILE *fp = (FILE*)arg;
54 fwrite((void*)n, 1, NLMSG_ALIGN(n->nlmsg_len), fp);
61 fprintf(stderr, "Usage: rtmon file FILE [ all | LISTofOBJECTS]\n");
62 fprintf(stderr, "LISTofOBJECTS := [ link ] [ address ] [ route ]\n");
67 main(int argc, char **argv)
70 struct rtnl_handle rth;
71 int family = AF_UNSPEC;
72 unsigned groups = ~0U;
79 if (matches(argv[1], "-family") == 0) {
84 if (strcmp(argv[1], "inet") == 0)
86 else if (strcmp(argv[1], "inet6") == 0)
88 else if (strcmp(argv[1], "link") == 0)
90 else if (strcmp(argv[1], "help") == 0)
93 fprintf(stderr, "Protocol ID \"%s\" is unknown, try \"rtmon help\".\n", argv[1]);
96 } else if (strcmp(argv[1], "-4") == 0) {
98 } else if (strcmp(argv[1], "-6") == 0) {
100 } else if (strcmp(argv[1], "-0") == 0) {
102 } else if (matches(argv[1], "-Version") == 0) {
103 printf("rtmon utility, iproute2-ss%s\n", SNAPSHOT);
105 } else if (matches(argv[1], "file") == 0) {
111 } else if (matches(argv[1], "link") == 0) {
114 } else if (matches(argv[1], "address") == 0) {
117 } else if (matches(argv[1], "route") == 0) {
120 } else if (strcmp(argv[1], "all") == 0) {
122 } else if (matches(argv[1], "help") == 0) {
125 fprintf(stderr, "Argument \"%s\" is unknown, try \"rtmon help\".\n", argv[1]);
132 fprintf(stderr, "Not enough information: argument \"file\" is required\n");
136 groups |= nl_mgrp(RTNLGRP_LINK);
138 if (!family || family == AF_INET)
139 groups |= nl_mgrp(RTNLGRP_IPV4_IFADDR);
140 if (!family || family == AF_INET6)
141 groups |= nl_mgrp(RTNLGRP_IPV6_IFADDR);
144 if (!family || family == AF_INET)
145 groups |= nl_mgrp(RTNLGRP_IPV4_ROUTE);
146 if (!family || family == AF_INET6)
147 groups |= nl_mgrp(RTNLGRP_IPV6_ROUTE);
150 fp = fopen(file, "w");
152 perror("Cannot fopen");
156 if (rtnl_open(&rth, groups) < 0)
159 if (rtnl_wilddump_request(&rth, AF_UNSPEC, RTM_GETLINK) < 0) {
160 perror("Cannot send dump request");
166 if (rtnl_dump_filter(&rth, dump_msg, fp) < 0) {
167 fprintf(stderr, "Dump terminated\n");
173 if (rtnl_listen(&rth, dump_msg, (void*)fp) < 0)