LXR iproute2/tc/tc

   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 <fcntl.h>
  17#include <sys/socket.h>
  18#include <netinet/in.h>
  19#include <arpa/inet.h>
  20#include <string.h>
  21#include <time.h>
  22#include "rt_names.h"
  23#include "utils.h"
  24#include "tc_util.h"
  25#include "tc_common.h"
  26
  27
  28static void usage(void) __attribute__((noreturn));
  29
  30static void usage(void)
  31{
  32        fprintf(stderr, "Usage: tc [-timestamp [-tshort] monitor\n");
  33        exit(-1);
  34}
  35
  36
  37static int accept_tcmsg(struct rtnl_ctrl_data *ctrl,
  38                        struct nlmsghdr *n, void *arg)
  39{
  40        FILE *fp = (FILE *)arg;
  41
  42        if (timestamp)
  43                print_timestamp(fp);
  44
  45        if (n->nlmsg_type == RTM_NEWTFILTER ||
  46            n->nlmsg_type == RTM_DELTFILTER ||
  47            n->nlmsg_type == RTM_NEWCHAIN ||
  48            n->nlmsg_type == RTM_DELCHAIN) {
  49                print_filter(n, arg);
  50                return 0;
  51        }
  52        if (n->nlmsg_type == RTM_NEWTCLASS || n->nlmsg_type == RTM_DELTCLASS) {
  53                print_class(n, arg);
  54                return 0;
  55        }
  56        if (n->nlmsg_type == RTM_NEWQDISC || n->nlmsg_type == RTM_DELQDISC) {
  57                print_qdisc(n, arg);
  58                return 0;
  59        }
  60        if (n->nlmsg_type == RTM_GETACTION || n->nlmsg_type == RTM_NEWACTION ||
  61            n->nlmsg_type == RTM_DELACTION) {
  62                print_action(n, arg);
  63                return 0;
  64        }
  65        if (n->nlmsg_type != NLMSG_ERROR && n->nlmsg_type != NLMSG_NOOP &&
  66            n->nlmsg_type != NLMSG_DONE) {
  67                fprintf(fp, "Unknown message: length %08d type %08x flags %08x\n",
  68                        n->nlmsg_len, n->nlmsg_type, n->nlmsg_flags);
  69        }
  70        return 0;
  71}
  72
  73int do_tcmonitor(int argc, char **argv)
  74{
  75        struct rtnl_handle rth;
  76        char *file = NULL;
  77        unsigned int groups = nl_mgrp(RTNLGRP_TC);
  78
  79        while (argc > 0) {
  80                if (matches(*argv, "file") == 0) {
  81                        NEXT_ARG();
  82                        file = *argv;
  83                } else {
  84                        if (matches(*argv, "help") == 0) {
  85                                usage();
  86                        } else {
  87                                fprintf(stderr, "Argument \"%s\" is unknown, try \"tc monitor help\".\n", *argv);
  88                                exit(-1);
  89                        }
  90                }
  91                argc--; argv++;
  92        }
  93
  94        if (file) {
  95                FILE *fp = fopen(file, "r");
  96                int ret;
  97
  98                if (fp == NULL) {
  99                        perror("Cannot fopen");
 100                        exit(-1);
 101                }
 102
 103                ret = rtnl_from_file(fp, accept_tcmsg, stdout);
 104                fclose(fp);
 105                return ret;
 106        }
 107
 108        if (rtnl_open(&rth, groups) < 0)
 109                exit(1);
 110
 111        ll_init_map(&rth);
 112
 113        if (rtnl_listen(&rth, accept_tcmsg, (void *)stdout) < 0) {
 114                rtnl_close(&rth);
 115                exit(2);
 116        }
 117
 118        rtnl_close(&rth);
 119        exit(0);
 120}
 121