| /* |
| * tc_monitor.c "tc monitor". |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License |
| * as published by the Free Software Foundation; either version |
| * 2 of the License, or (at your option) any later version. |
| * |
| * Authors: Jamal Hadi Salim |
| * |
| */ |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <unistd.h> |
| #include <syslog.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(const struct sockaddr_nl *who, |
| 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) { |
| print_filter(who, n, arg); |
| return 0; |
| } |
| if (n->nlmsg_type == RTM_NEWTCLASS || n->nlmsg_type == RTM_DELTCLASS) { |
| print_class(who, n, arg); |
| return 0; |
| } |
| if (n->nlmsg_type == RTM_NEWQDISC || n->nlmsg_type == RTM_DELQDISC) { |
| print_qdisc(who, n, arg); |
| return 0; |
| } |
| if (n->nlmsg_type == RTM_GETACTION || n->nlmsg_type == RTM_NEWACTION || |
| n->nlmsg_type == RTM_DELACTION) { |
| print_action(who, n, arg); |
| return 0; |
| } |
| if (n->nlmsg_type != NLMSG_ERROR && n->nlmsg_type != NLMSG_NOOP && |
| n->nlmsg_type != NLMSG_DONE) { |
| fprintf(fp, "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 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); |
| } |