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/*
* brmonitor.c "bridge monitor"
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*
* Authors: Stephen Hemminger <shemminger@vyatta.com>
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <time.h>
#include <sys/socket.h>
#include <sys/time.h>
#include <net/if.h>
#include <netinet/in.h>
#include <linux/if_bridge.h>
#include <linux/neighbour.h>
#include <string.h>
#include "utils.h"
#include "br_common.h"
static void usage(void) __attribute__((noreturn));
int prefix_banner;
static void usage(void)
{
fprintf(stderr, "Usage: bridge monitor [file | link | fdb | mdb | all]\n");
exit(-1);
}
static int show_mark(FILE *fp, const struct nlmsghdr *n)
{
char *tstr;
time_t secs = ((__u32*)NLMSG_DATA(n))[0];
long usecs = ((__u32*)NLMSG_DATA(n))[1];
tstr = asctime(localtime(&secs));
tstr[strlen(tstr)-1] = 0;
fprintf(fp, "Timestamp: %s %lu us\n", tstr, usecs);
return 0;
}
static int accept_msg(const struct sockaddr_nl *who,
struct nlmsghdr *n, void *arg)
{
FILE *fp = arg;
if (timestamp)
print_timestamp(fp);
switch (n->nlmsg_type) {
case RTM_NEWLINK:
case RTM_DELLINK:
if (prefix_banner)
fprintf(fp, "[LINK]");
return print_linkinfo(who, n, arg);
case RTM_NEWNEIGH:
case RTM_DELNEIGH:
if (prefix_banner)
fprintf(fp, "[NEIGH]");
return print_fdb(who, n, arg);
case RTM_NEWMDB:
case RTM_DELMDB:
if (prefix_banner)
fprintf(fp, "[MDB]");
return print_mdb(who, n, arg);
case 15:
return show_mark(fp, n);
default:
return 0;
}
}
int do_monitor(int argc, char **argv)
{
char *file = NULL;
unsigned groups = ~RTMGRP_TC;
int llink=0;
int lneigh=0;
int lmdb=0;
rtnl_close(&rth);
while (argc > 0) {
if (matches(*argv, "file") == 0) {
NEXT_ARG();
file = *argv;
} else if (matches(*argv, "link") == 0) {
llink=1;
groups = 0;
} else if (matches(*argv, "fdb") == 0) {
lneigh = 1;
groups = 0;
} else if (matches(*argv, "mdb") == 0) {
lmdb = 1;
groups = 0;
} else if (strcmp(*argv, "all") == 0) {
groups = ~RTMGRP_TC;
prefix_banner=1;
} else if (matches(*argv, "help") == 0) {
usage();
} else {
fprintf(stderr, "Argument \"%s\" is unknown, try \"bridge monitor help\".\n", *argv);
exit(-1);
}
argc--; argv++;
}
if (llink)
groups |= nl_mgrp(RTNLGRP_LINK);
if (lneigh) {
groups |= nl_mgrp(RTNLGRP_NEIGH);
}
if (lmdb) {
groups |= nl_mgrp(RTNLGRP_MDB);
}
if (file) {
FILE *fp;
fp = fopen(file, "r");
if (fp == NULL) {
perror("Cannot fopen");
exit(-1);
}
return rtnl_from_file(fp, accept_msg, stdout);
}
if (rtnl_open(&rth, groups) < 0)
exit(1);
ll_init_map(&rth);
if (rtnl_listen(&rth, accept_msg, stdout) < 0)
exit(2);
return 0;
}
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