| /* |
| * 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 accept_msg(const struct sockaddr_nl *who, |
| struct rtnl_ctrl_data *ctrl, |
| 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 NLMSG_TSTAMP: |
| print_nlmsg_timestamp(fp, n); |
| return 0; |
| |
| 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; |
| int err; |
| fp = fopen(file, "r"); |
| if (fp == NULL) { |
| perror("Cannot fopen"); |
| exit(-1); |
| } |
| err = rtnl_from_file(fp, accept_msg, stdout); |
| fclose(fp); |
| return err; |
| } |
| |
| if (rtnl_open(&rth, groups) < 0) |
| exit(1); |
| ll_init_map(&rth); |
| |
| if (rtnl_listen(&rth, accept_msg, stdout) < 0) |
| exit(2); |
| |
| return 0; |
| } |
| |