1 /*
2 * tc_monitor.c "tc monitor".
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: Jamal Hadi Salim
10 *
11 */
12
13 #include <stdio.h>
14 #include <stdlib.h>
15 #include <unistd.h>
16 #include <syslog.h>
17 #include <fcntl.h>
18 #include <sys/socket.h>
19 #include <netinet/in.h>
20 #include <arpa/inet.h>
21 #include <string.h>
22 #include <time.h>
23 #include "rt_names.h"
24 #include "utils.h"
25 #include "tc_util.h"
26 #include "tc_common.h"
27
28
29 static void usage(void) __attribute__((noreturn));
30
usage(void)31 static void usage(void)
32 {
33 fprintf(stderr, "Usage: tc monitor\n");
34 exit(-1);
35 }
36
37
accept_tcmsg(const struct sockaddr_nl * who,struct nlmsghdr * n,void * arg)38 int accept_tcmsg(const struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
39 {
40 FILE *fp = (FILE*)arg;
41
42 if (n->nlmsg_type == RTM_NEWTFILTER || n->nlmsg_type == RTM_DELTFILTER) {
43 print_filter(who, n, arg);
44 return 0;
45 }
46 if (n->nlmsg_type == RTM_NEWTCLASS || n->nlmsg_type == RTM_DELTCLASS) {
47 print_class(who, n, arg);
48 return 0;
49 }
50 if (n->nlmsg_type == RTM_NEWQDISC || n->nlmsg_type == RTM_DELQDISC) {
51 print_qdisc(who, n, arg);
52 return 0;
53 }
54 if (n->nlmsg_type == RTM_GETACTION || n->nlmsg_type == RTM_NEWACTION ||
55 n->nlmsg_type == RTM_DELACTION) {
56 print_action(who, n, arg);
57 return 0;
58 }
59 if (n->nlmsg_type != NLMSG_ERROR && n->nlmsg_type != NLMSG_NOOP &&
60 n->nlmsg_type != NLMSG_DONE) {
61 fprintf(fp, "Unknown message: length %08d type %08x flags %08x\n",
62 n->nlmsg_len, n->nlmsg_type, n->nlmsg_flags);
63 }
64 return 0;
65 }
66
do_tcmonitor(int argc,char ** argv)67 int do_tcmonitor(int argc, char **argv)
68 {
69 struct rtnl_handle rth;
70 char *file = NULL;
71 unsigned groups = nl_mgrp(RTNLGRP_TC);
72
73 while (argc > 0) {
74 if (matches(*argv, "file") == 0) {
75 NEXT_ARG();
76 file = *argv;
77 } else {
78 if (matches(*argv, "help") == 0) {
79 usage();
80 } else {
81 fprintf(stderr, "Argument \"%s\" is unknown, try \"tc monitor help\".\n", *argv);
82 exit(-1);
83 }
84 }
85 argc--; argv++;
86 }
87
88 if (file) {
89 FILE *fp;
90 fp = fopen(file, "r");
91 if (fp == NULL) {
92 perror("Cannot fopen");
93 exit(-1);
94 }
95 return rtnl_from_file(fp, accept_tcmsg, (void*)stdout);
96 }
97
98 if (rtnl_open(&rth, groups) < 0)
99 exit(1);
100
101 ll_init_map(&rth);
102
103 if (rtnl_listen(&rth, accept_tcmsg, (void*)stdout) < 0) {
104 rtnl_close(&rth);
105 exit(2);
106 }
107
108 rtnl_close(&rth);
109 exit(0);
110 }
111