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74 lines
2.7 KiB
74 lines
2.7 KiB
#!/bin/sh
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# vpn handler called by travelmate
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# Copyright (c) 2020-2022 Dirk Brenken (dev@brenken.org)
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# This is free software, licensed under the GNU General Public License v3.
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# set (s)hellcheck exceptions
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# shellcheck disable=1091,3040,3043
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# Please note: you have to setup the package 'wireguard' or 'openvpn' before using this script
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. "/lib/functions.sh"
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export LC_ALL=C
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export PATH="/usr/sbin:/usr/bin:/sbin:/bin"
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set -o pipefail
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vpn="${1}"
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vpn_action="${2}"
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vpn_service="${3}"
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vpn_iface="${4}"
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trm_maxwait="$(uci_get travelmate global trm_maxwait "30")"
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trm_captiveurl="$(uci_get travelmate global trm_captiveurl "http://detectportal.firefox.com")"
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trm_useragent="$(uci_get travelmate global trm_useragent "Mozilla/5.0 (Linux x86_64; rv:90.0) Gecko/20100101 Firefox/90.0")"
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trm_logger="$(command -v logger)"
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trm_fetch="$(command -v curl)"
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trm_vpnfile="/var/state/travelmate.vpn"
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f_net() {
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local json_rc result="net nok"
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json_rc="$(${trm_fetch} --user-agent "${trm_useragent}" --referer "http://www.example.com" --header "Cache-Control: no-cache, no-store, must-revalidate, max-age=0" --write-out "%{response_code}" --silent --output /dev/null --max-time $((trm_maxwait / 6)) "${trm_captiveurl}")"
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if [ "${json_rc}" = "200" ] || [ "${json_rc}" = "204" ]; then
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result="net ok"
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fi
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printf "%s" "${result}"
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}
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vpn_status="$(ubus -S call network.interface."${vpn_iface}" status 2>/dev/null | jsonfilter -q -l1 -e '@.up')"
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if [ "${vpn}" = "1" ] && [ "${vpn_action}" = "enable" ] && [ "${vpn_status}" != "true" ]; then
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if [ "${vpn_service}" = "openvpn" ] && [ -x "/etc/init.d/openvpn" ]; then
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/etc/init.d/openvpn start
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fi
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ifup "${vpn_iface}"
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cnt=0
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while true; do
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vpn_status="$(ubus -S call network.interface."${vpn_iface}" status 2>/dev/null | jsonfilter -q -l1 -e '@.up')"
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if [ "${vpn_status}" = "true" ]; then
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net_status="$(f_net)"
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if [ "${net_status}" = "net ok" ]; then
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: >"${trm_vpnfile}"
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"${trm_logger}" -p "info" -t "trm-vpn [${$}]" "${vpn_service} client connection enabled" 2>/dev/null
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break
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fi
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fi
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if [ "${cnt}" -ge "$((trm_maxwait / 3))" ]; then
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ifdown "${vpn_iface}"
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if [ "${vpn_service}" = "openvpn" ] && [ -x "/etc/init.d/openvpn" ]; then
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/etc/init.d/openvpn stop
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fi
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rm -f "${trm_vpnfile}"
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"${trm_logger}" -p "info" -t "trm-vpn [${$}]" "${vpn_service} client connection can't be established" 2>/dev/null
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exit 1
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fi
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sleep 1
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cnt="$((cnt + 1))"
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done
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elif { [ "${vpn}" != "1" ] && [ "${vpn_action}" = "enable" ]; } || [ "${vpn_action}" = "disable" ]; then
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ifdown "${vpn_iface}"
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if [ "${vpn_service}" = "openvpn" ] && [ -x "/etc/init.d/openvpn" ]; then
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/etc/init.d/openvpn stop
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fi
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rm -f "${trm_vpnfile}"
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"${trm_logger}" -p "info" -t "trm-vpn [${$}]" "${vpn_service} client connection disabled" 2>/dev/null
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fi
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