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User runs "tc monitor" (without quotes) and watches events of addition, deletion and updates from qdiscs, classes, filters and actions as they happen. Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
111 lines
2.3 KiB
C
111 lines
2.3 KiB
C
/*
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* tc_monitor.c "tc monitor".
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*
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* Authors: Jamal Hadi Salim
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*
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <syslog.h>
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#include <fcntl.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <string.h>
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#include <time.h>
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#include "rt_names.h"
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#include "utils.h"
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#include "tc_util.h"
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#include "tc_common.h"
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static void usage(void) __attribute__((noreturn));
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static void usage(void)
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{
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fprintf(stderr, "Usage: tc monitor\n");
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exit(-1);
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}
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int accept_tcmsg(const struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
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{
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FILE *fp = (FILE*)arg;
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if (n->nlmsg_type == RTM_NEWTFILTER || n->nlmsg_type == RTM_DELTFILTER) {
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print_filter(who, n, arg);
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return 0;
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}
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if (n->nlmsg_type == RTM_NEWTCLASS || n->nlmsg_type == RTM_DELTCLASS) {
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print_class(who, n, arg);
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return 0;
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}
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if (n->nlmsg_type == RTM_NEWQDISC || n->nlmsg_type == RTM_DELQDISC) {
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print_qdisc(who, n, arg);
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return 0;
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}
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if (n->nlmsg_type == RTM_GETACTION || n->nlmsg_type == RTM_NEWACTION ||
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n->nlmsg_type == RTM_DELACTION) {
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print_action(who, n, arg);
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return 0;
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}
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if (n->nlmsg_type != NLMSG_ERROR && n->nlmsg_type != NLMSG_NOOP &&
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n->nlmsg_type != NLMSG_DONE) {
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fprintf(fp, "Unknown message: length %08d type %08x flags %08x\n",
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n->nlmsg_len, n->nlmsg_type, n->nlmsg_flags);
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}
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return 0;
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}
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int do_tcmonitor(int argc, char **argv)
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{
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struct rtnl_handle rth;
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char *file = NULL;
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unsigned groups = RTMGRP_TC;
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while (argc > 0) {
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if (matches(*argv, "file") == 0) {
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NEXT_ARG();
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file = *argv;
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} else {
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if (matches(*argv, "help") == 0) {
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usage();
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} else {
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fprintf(stderr, "Argument \"%s\" is unknown, try \"tc monitor help\".\n", *argv);
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exit(-1);
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}
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}
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argc--; argv++;
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}
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if (file) {
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FILE *fp;
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fp = fopen(file, "r");
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if (fp == NULL) {
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perror("Cannot fopen");
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exit(-1);
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}
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return rtnl_from_file(fp, accept_tcmsg, (void*)stdout);
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}
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if (rtnl_open(&rth, groups) < 0)
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exit(1);
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ll_init_map(&rth);
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if (rtnl_listen(&rth, accept_tcmsg, (void*)stdout) < 0) {
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rtnl_close(&rth);
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exit(2);
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}
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rtnl_close(&rth);
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exit(0);
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}
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