release/src-rt-6.x.4708/router/rc/redial.c

   1 /*
   2
   3         Copyright 2003, CyberTAN  Inc.  All Rights Reserved
   4
   5         THIS SOFTWARE IS OFFERED "AS IS", AND CYBERTAN GRANTS NO WARRANTIES OF ANY
   6         KIND, EXPRESS OR IMPLIED, BY STATUTE, COMMUNICATION OR OTHERWISE.  CYBERTAN
   7         SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS
   8         FOR A SPECIFIC PURPOSE OR NONINFRINGEMENT CONCERNING THIS SOFTWARE
   9
  10 */
  11 /*
  12
  13         Copyright 2005, Broadcom Corporation
  14         All Rights Reserved.
  15
  16         THIS SOFTWARE IS OFFERED "AS IS", AND BROADCOM GRANTS NO WARRANTIES OF ANY
  17         KIND, EXPRESS OR IMPLIED, BY STATUTE, COMMUNICATION OR OTHERWISE. BROADCOM
  18         SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS
  19         FOR A SPECIFIC PURPOSE OR NONINFRINGEMENT CONCERNING THIS SOFTWARE.
  20
  21 */
  22
  23 #include "rc.h"
  24
  25 #include <sys/ioctl.h>
  26 #include <wait.h>
  27
  28
  29 // used in keepalive mode (ppp_demand=0)
  30
  31
  32 int start_redial(void)
  33 {
  34         stop_redial();
  35
  36         xstart("redial");
  37         return 0;
  38 }
  39
  40 int stop_redial(void)
  41 {
  42         while (killall("redial", SIGKILL) == 0) {
  43                 sleep(1);
  44         }
  45         return 0;
  46 }
  47
  48 int redial_main(int argc, char **argv)
  49 {
  50         int tm;
  51         int count;
  52         int proto;
  53
  54         proto = get_wan_proto();
  55         if (proto == WP_PPPOE || proto == WP_PPP3G || proto == WP_PPTP || proto == WP_L2TP) {
  56                 if (nvram_get_int("ppp_demand") != 0) return 0;
  57         }
  58
  59         tm = nvram_get_int("ppp_redialperiod") ? : 30;
  60         if (tm < 5) tm = 5;
  61
  62         syslog(LOG_INFO, "Started. Time: %d", tm);
  63
  64         count = 0;
  65         sleep(10);
  66
  67         while (1) {
  68                 while (1) {
  69                         sleep(tm);
  70                         if (!check_wanup()) break;
  71                         count = 0;
  72                 }
  73
  74 #if 0
  75                 long ut;
  76                 if ((count < 3) && (get_wan_proto() == WP_PPPOE) || (get_wan_proto() == WP_PPP3G)) {
  77                         if (f_read("/var/lib/misc/pppoe-disc", &ut, sizeof(ut)) == sizeof(ut)) {
  78                                 ut = (get_uptime() - ut);
  79                                 if (ut <= 15) {
  80                                         syslog(LOG_INFO, "PPPoE reconnect in progress (%ld)", ut);
  81                                         ++count;
  82                                         continue;
  83                                 }
  84                         }
  85                 }
  86 #endif
  87
  88                 if ((!wait_action_idle(10)) || (check_wanup())) continue;
  89
  90                 if (!nvram_match("action_service", "wan-restart")) {
  91                         syslog(LOG_INFO, "WAN down. Reconnecting...");
  92                         xstart("service", "wan", "restart");
  93                         break;
  94                 }
  95                 else {
  96                         syslog(LOG_INFO, "WAN down. Reconnect is already in progress...");
  97                 }
  98         }
  99
 100         return 0;
 101 }