main.c

   1 /*
   2  * Copyright (C) 2014 John Crispin <blogic@openwrt.org>
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU Lesser General Public License version 2.1
   6  * as published by the Free Software Foundation
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  */
  13
  14 #include <sys/stat.h>
  15 #include <sys/types.h>
  16
  17 #include <time.h>
  18 #include <stdio.h>
  19 #include <fcntl.h>
  20 #include <getopt.h>
  21 #include <resolv.h>
  22 #include <unistd.h>
  23 #include <sys/types.h>
  24 #include <arpa/inet.h>
  25 #include <sys/socket.h>
  26 #include <netinet/in.h>
  27 #include <arpa/nameser.h>
  28 #include <asm/byteorder.h>
  29
  30 #include <libubus.h>
  31 #include <libubox/uloop.h>
  32
  33 #include "dns.h"
  34 #include "ubus.h"
  35 #include "util.h"
  36 #include "cache.h"
  37 #include "service.h"
  38 #include "announce.h"
  39 #include "interface.h"
  40
  41 static char *iface_name = "eth0";
  42
  43 static void
  44 signal_shutdown(int signal)
  45 {
  46         uloop_end();
  47 }
  48
  49 int
  50 main(int argc, char **argv)
  51 {
  52         int ch, ttl;
  53
  54         while ((ch = getopt(argc, argv, "t:i:d")) != -1) {
  55                 switch (ch) {
  56                 case 't':
  57                         ttl = atoi(optarg);
  58                         if (ttl > 0)
  59                                 announce_ttl = ttl;
  60                         else
  61                                 fprintf(stderr, "invalid ttl\n");
  62                         break;
  63                 case 'd':
  64                         debug++;
  65                         break;
  66                 case 'i':
  67                         iface_name = optarg;
  68                         break;
  69                 }
  70         }
  71
  72         if (!iface_name)
  73                 return -1;
  74
  75         uloop_init();
  76
  77         if (interface_add(iface_name)) {
  78                 fprintf(stderr, "Failed to add interface %s\n", iface_name);
  79                 return -1;
  80         }
  81
  82         signal(SIGPIPE, SIG_IGN);
  83         signal(SIGTERM, signal_shutdown);
  84         signal(SIGKILL, signal_shutdown);
  85
  86         if (cache_init())
  87                 return -1;
  88
  89         service_init();
  90
  91         ubus_startup();
  92         uloop_run();
  93         uloop_done();
  94
  95         cache_cleanup();
  96         service_cleanup();
  97         vlist_flush(&interfaces);
  98
  99         return 0;
 100 }