====== Set fake default route dynamically based on SSID ====== This script checks every 5 seconds which interface should be used as default gateway. As the default gateway is managed by the link-manager, a fake default gateway is configured by this script. \\ Conditions could be any, here it depend on which WLAN SSID the router is connected. /* DESC: set route to server depending on active WWAN / WLAN network * Copyright (C) 2014 NetModule AG * */ nb_syslog("starting"); void restartIPsec(){ nb_config_set("ipsec.status=0"); sleep(6); // lower valus result in disabled ipsec admin status nb_config_set("ipsec.status=1"); } void addRoute(int id, string interface, string destination, string netmask, string gateway){ route = strcat("route." ,id, ".metric=", 0); route = strcat(route, " route." ,id, ".interface=", interface); route = strcat(route, " route." ,id, ".target=", destination); route = strcat(route, " route." ,id, ".netmask=", netmask); route = strcat(route, " route." ,id, ".gateway=", gateway); nb_config_set(route); } lastWanInterface = ""; while (1) { wanInterface = ""; status = nb_status("wan"); wwan_status = status.WANLINK1_STATE; wlan_status = status.WANLINK2_STATE; wlan_network = status.WANLINK2_NETWORK; SERVER = nb_config_get("ipsec.0.remote.serverIp"); nb_syslog("WLAN is %s with %s", wlan_status, wlan_network); nb_syslog("WWAN is %s", wwan_status); nb_syslog("routing traffic over %s", lastWanInterface); if (wlan_status == "up" && wlan_network == "kis") { // take wlan link for IPsec wanInterface = "wlan0"; } else if (wwan_status == "up" || wlan_status == "up" && wlan_network == "video") { // take mobile link for IPsec wanInterface = "wwan0"; } if (wanInterface != "" && wanInterface != lastWanInterface) { if (wanInterface == "wlan0") { addRoute(0, wanInterface, SERVER, "255.255.255.255", struct_get(status, "WANLINK2_GATEWAY")); addRoute(1, wanInterface, "0.0.0.0", "128.0.0.0", struct_get(status, "WANLINK2_GATEWAY")); addRoute(2, wanInterface, "128.0.0.0", "128.0.0.0", struct_get(status, "WANLINK2_GATEWAY")); nb_syslog("routing traffic over wlan"); } else if (wanInterface == "wwan0") { addRoute(0, wanInterface, SERVER, "255.255.255.255", struct_get(status, "WANLINK1_GATEWAY")); addRoute(1, wanInterface, "0.0.0.0", "128.0.0.0", struct_get(status, "WANLINK1_GATEWAY")); addRoute(2, wanInterface, "128.0.0.0", "128.0.0.0", struct_get(status, "WANLINK1_GATEWAY")); nb_syslog("routing traffic over mobile"); } restartIPsec(); lastWanInterface = wanInterface; } sleep(5); } nb_syslog("exit"); exit(0);