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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* tc_monitor.c "tc monitor".
*
* Authors: Jamal Hadi Salim
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <string.h>
#include <time.h>
#include "rt_names.h"
#include "utils.h"
#include "tc_util.h"
#include "tc_common.h"
static void usage(void) __attribute__((noreturn));
static void usage(void)
{
fprintf(stderr, "Usage: tc [-timestamp [-tshort] monitor\n");
exit(-1);
}
static int accept_tcmsg(struct rtnl_ctrl_data *ctrl,
struct nlmsghdr *n, void *arg)
{
FILE *fp = (FILE *)arg;
if (timestamp)
print_timestamp(fp);
if (n->nlmsg_type == RTM_NEWTFILTER ||
n->nlmsg_type == RTM_DELTFILTER ||
n->nlmsg_type == RTM_NEWCHAIN ||
n->nlmsg_type == RTM_DELCHAIN) {
print_filter(n, arg);
return 0;
}
if (n->nlmsg_type == RTM_NEWTCLASS || n->nlmsg_type == RTM_DELTCLASS) {
print_class(n, arg);
return 0;
}
if (n->nlmsg_type == RTM_NEWQDISC || n->nlmsg_type == RTM_DELQDISC) {
print_qdisc(n, arg);
return 0;
}
if (n->nlmsg_type == RTM_GETACTION || n->nlmsg_type == RTM_NEWACTION ||
n->nlmsg_type == RTM_DELACTION) {
print_action(n, arg);
return 0;
}
if (n->nlmsg_type != NLMSG_ERROR && n->nlmsg_type != NLMSG_NOOP &&
n->nlmsg_type != NLMSG_DONE) {
fprintf(stderr, "Unknown message: length %08d type %08x flags %08x\n",
n->nlmsg_len, n->nlmsg_type, n->nlmsg_flags);
}
return 0;
}
int do_tcmonitor(int argc, char **argv)
{
struct rtnl_handle rth;
char *file = NULL;
unsigned int groups = nl_mgrp(RTNLGRP_TC);
while (argc > 0) {
if (matches(*argv, "file") == 0) {
NEXT_ARG();
file = *argv;
} else {
if (matches(*argv, "help") == 0) {
usage();
} else {
fprintf(stderr, "Argument \"%s\" is unknown, try \"tc monitor help\".\n", *argv);
exit(-1);
}
}
argc--; argv++;
}
if (file) {
FILE *fp = fopen(file, "r");
int ret;
if (fp == NULL) {
perror("Cannot fopen");
exit(-1);
}
ret = rtnl_from_file(fp, accept_tcmsg, stdout);
fclose(fp);
return ret;
}
if (rtnl_open(&rth, groups) < 0)
exit(1);
ll_init_map(&rth);
if (rtnl_listen(&rth, accept_tcmsg, (void *)stdout) < 0) {
rtnl_close(&rth);
exit(2);
}
rtnl_close(&rth);
exit(0);
}
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