Stephen Hemminger | d04bc30 | 2012-08-01 15:23:49 -0700 | [diff] [blame] | 1 | /* |
Chris Webb | 9069817 | 2012-08-16 21:42:37 +0100 | [diff] [blame^] | 2 | * brmonitor.c "bridge monitor" |
Stephen Hemminger | d04bc30 | 2012-08-01 15:23:49 -0700 | [diff] [blame] | 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: Stephen Hemminger <shemminger@vyatta.com> |
| 10 | * |
| 11 | */ |
| 12 | |
| 13 | #include <stdio.h> |
| 14 | #include <stdlib.h> |
| 15 | #include <unistd.h> |
| 16 | #include <time.h> |
| 17 | #include <sys/socket.h> |
| 18 | #include <sys/time.h> |
| 19 | #include <net/if.h> |
| 20 | #include <netinet/in.h> |
| 21 | #include <linux/if_bridge.h> |
| 22 | #include <linux/neighbour.h> |
| 23 | #include <string.h> |
| 24 | |
| 25 | #include "utils.h" |
| 26 | #include "br_common.h" |
| 27 | |
| 28 | |
| 29 | static void usage(void) __attribute__((noreturn)); |
| 30 | int prefix_banner; |
| 31 | |
| 32 | static void usage(void) |
| 33 | { |
Chris Webb | 9069817 | 2012-08-16 21:42:37 +0100 | [diff] [blame^] | 34 | fprintf(stderr, "Usage: bridge monitor\n"); |
Stephen Hemminger | d04bc30 | 2012-08-01 15:23:49 -0700 | [diff] [blame] | 35 | exit(-1); |
| 36 | } |
| 37 | |
| 38 | static int show_mark(FILE *fp, const struct nlmsghdr *n) |
| 39 | { |
| 40 | char *tstr; |
| 41 | time_t secs = ((__u32*)NLMSG_DATA(n))[0]; |
| 42 | long usecs = ((__u32*)NLMSG_DATA(n))[1]; |
| 43 | tstr = asctime(localtime(&secs)); |
| 44 | tstr[strlen(tstr)-1] = 0; |
| 45 | fprintf(fp, "Timestamp: %s %lu us\n", tstr, usecs); |
| 46 | return 0; |
| 47 | } |
| 48 | |
| 49 | int accept_msg(const struct sockaddr_nl *who, |
| 50 | struct nlmsghdr *n, void *arg) |
| 51 | { |
| 52 | FILE *fp = arg; |
| 53 | |
| 54 | if (timestamp) |
| 55 | print_timestamp(fp); |
| 56 | |
| 57 | switch (n->nlmsg_type) { |
| 58 | case RTM_NEWLINK: |
| 59 | case RTM_DELLINK: |
| 60 | if (prefix_banner) |
| 61 | fprintf(fp, "[LINK]"); |
| 62 | |
| 63 | return print_linkinfo(who, n, arg); |
| 64 | |
| 65 | case RTM_NEWNEIGH: |
| 66 | case RTM_DELNEIGH: |
| 67 | if (prefix_banner) |
| 68 | fprintf(fp, "[NEIGH]"); |
| 69 | return print_fdb(who, n, arg); |
| 70 | |
| 71 | case 15: |
| 72 | return show_mark(fp, n); |
| 73 | |
| 74 | default: |
| 75 | return 0; |
| 76 | } |
| 77 | |
| 78 | |
| 79 | } |
| 80 | |
| 81 | int do_monitor(int argc, char **argv) |
| 82 | { |
| 83 | char *file = NULL; |
| 84 | unsigned groups = ~RTMGRP_TC; |
| 85 | int llink=0; |
| 86 | int lneigh=0; |
| 87 | |
| 88 | rtnl_close(&rth); |
| 89 | |
| 90 | while (argc > 0) { |
| 91 | if (matches(*argv, "file") == 0) { |
| 92 | NEXT_ARG(); |
| 93 | file = *argv; |
| 94 | } else if (matches(*argv, "link") == 0) { |
| 95 | llink=1; |
| 96 | groups = 0; |
| 97 | } else if (matches(*argv, "fdb") == 0) { |
| 98 | lneigh = 1; |
| 99 | groups = 0; |
| 100 | } else if (strcmp(*argv, "all") == 0) { |
| 101 | groups = ~RTMGRP_TC; |
| 102 | prefix_banner=1; |
| 103 | } else if (matches(*argv, "help") == 0) { |
| 104 | usage(); |
| 105 | } else { |
Chris Webb | 9069817 | 2012-08-16 21:42:37 +0100 | [diff] [blame^] | 106 | fprintf(stderr, "Argument \"%s\" is unknown, try \"bridge monitor help\".\n", *argv); |
Stephen Hemminger | d04bc30 | 2012-08-01 15:23:49 -0700 | [diff] [blame] | 107 | exit(-1); |
| 108 | } |
| 109 | argc--; argv++; |
| 110 | } |
| 111 | |
| 112 | if (llink) |
| 113 | groups |= nl_mgrp(RTNLGRP_LINK); |
| 114 | |
| 115 | if (lneigh) { |
| 116 | groups |= nl_mgrp(RTNLGRP_NEIGH); |
| 117 | } |
| 118 | |
| 119 | if (file) { |
| 120 | FILE *fp; |
| 121 | fp = fopen(file, "r"); |
| 122 | if (fp == NULL) { |
| 123 | perror("Cannot fopen"); |
| 124 | exit(-1); |
| 125 | } |
| 126 | return rtnl_from_file(fp, accept_msg, stdout); |
| 127 | } |
| 128 | |
| 129 | if (rtnl_open(&rth, groups) < 0) |
| 130 | exit(1); |
| 131 | ll_init_map(&rth); |
| 132 | |
| 133 | if (rtnl_listen(&rth, accept_msg, stdout) < 0) |
| 134 | exit(2); |
| 135 | |
| 136 | return 0; |
| 137 | } |
| 138 | |