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8#include <stdio.h>
9#include <stdlib.h>
10#include <unistd.h>
11#include <time.h>
12#include <sys/socket.h>
13#include <sys/time.h>
14#include <net/if.h>
15#include <netinet/in.h>
16#include <linux/if_bridge.h>
17#include <linux/neighbour.h>
18#include <string.h>
19
20#include "utils.h"
21#include "br_common.h"
22
23
24static void usage(void) __attribute__((noreturn));
25static int prefix_banner;
26
27static void usage(void)
28{
29 fprintf(stderr, "Usage: bridge monitor [file | link | fdb | mdb | vlan | vni | all]\n");
30 exit(-1);
31}
32
33static int accept_msg(struct rtnl_ctrl_data *ctrl,
34 struct nlmsghdr *n, void *arg)
35{
36 FILE *fp = arg;
37
38 switch (n->nlmsg_type) {
39 case RTM_NEWLINK:
40 case RTM_DELLINK:
41 return print_linkinfo(n, arg);
42
43 case RTM_NEWNEIGH:
44 case RTM_DELNEIGH:
45 return print_fdb(n, arg);
46
47 case RTM_NEWMDB:
48 case RTM_DELMDB:
49 return print_mdb_mon(n, arg);
50
51 case NLMSG_TSTAMP:
52 print_nlmsg_timestamp(fp, n);
53 return 0;
54
55 case RTM_NEWVLAN:
56 case RTM_DELVLAN:
57 return print_vlan_rtm(n, arg, true, false);
58
59 case RTM_NEWTUNNEL:
60 case RTM_DELTUNNEL:
61 return print_vnifilter_rtm(n, arg);
62
63 default:
64 return 0;
65 }
66}
67
68void print_headers(FILE *fp, const char *label)
69{
70 if (timestamp)
71 print_timestamp(fp);
72
73 if (prefix_banner)
74 fprintf(fp, "%s", label);
75}
76
77int do_monitor(int argc, char **argv)
78{
79 char *file = NULL;
80 unsigned int groups = ~RTMGRP_TC;
81 int llink = 0;
82 int lneigh = 0;
83 int lmdb = 0;
84 int lvlan = 0;
85 int lvni = 0;
86
87 rtnl_close(&rth);
88
89 while (argc > 0) {
90 if (matches(*argv, "file") == 0) {
91 NEXT_ARG();
92 file = *argv;
93 } else if (matches(*argv, "link") == 0) {
94 llink = 1;
95 groups = 0;
96 } else if (matches(*argv, "fdb") == 0) {
97 lneigh = 1;
98 groups = 0;
99 } else if (matches(*argv, "mdb") == 0) {
100 lmdb = 1;
101 groups = 0;
102 } else if (matches(*argv, "vlan") == 0) {
103 lvlan = 1;
104 groups = 0;
105 } else if (strcmp(*argv, "vni") == 0) {
106 lvni = 1;
107 groups = 0;
108 } else if (strcmp(*argv, "all") == 0) {
109 groups = ~RTMGRP_TC;
110 lvlan = 1;
111 lvni = 1;
112 prefix_banner = 1;
113 } else if (matches(*argv, "help") == 0) {
114 usage();
115 } else {
116 fprintf(stderr, "Argument \"%s\" is unknown, try \"bridge monitor help\".\n", *argv);
117 exit(-1);
118 }
119 argc--; argv++;
120 }
121
122 if (llink)
123 groups |= nl_mgrp(RTNLGRP_LINK);
124
125 if (lneigh) {
126 groups |= nl_mgrp(RTNLGRP_NEIGH);
127 }
128
129 if (lmdb) {
130 groups |= nl_mgrp(RTNLGRP_MDB);
131 }
132
133 if (file) {
134 FILE *fp;
135 int err;
136
137 fp = fopen(file, "r");
138 if (fp == NULL) {
139 perror("Cannot fopen");
140 exit(-1);
141 }
142 err = rtnl_from_file(fp, accept_msg, stdout);
143 fclose(fp);
144 return err;
145 }
146
147 if (rtnl_open(&rth, groups) < 0)
148 exit(1);
149
150 if (lvlan && rtnl_add_nl_group(&rth, RTNLGRP_BRVLAN) < 0) {
151 fprintf(stderr, "Failed to add bridge vlan group to list\n");
152 exit(1);
153 }
154
155 if (lvni && rtnl_add_nl_group(&rth, RTNLGRP_TUNNEL) < 0) {
156 fprintf(stderr, "Failed to add bridge vni group to list\n");
157 exit(1);
158 }
159
160 ll_init_map(&rth);
161
162 if (rtnl_listen(&rth, accept_msg, stdout) < 0)
163 exit(2);
164
165 return 0;
166}
167
