pptpd: backport from trunk

Signed-off-by: Luka Perkov <luka@openwrt.org>

net/pptpd/files/options.pptpd

@@ -0,0 +1,22 @@
+#debug
+#logfile /tmp/pptp-server.log
+auth
+name "pptp-server"
+lcp-echo-failure 3
+lcp-echo-interval 60
+default-asyncmap
+mtu 1482
+mru 1482
+nobsdcomp
+nodeflate
+#noproxyarp
+#nomppc
+mppe required,no40,no56,stateless
+require-mschap-v2
+refuse-chap
+refuse-mschap
+refuse-eap
+refuse-pap
+#ms-dns 172.16.1.1
+#plugin radius.so
+#radius-config-file /etc/radius.conf

net/pptpd/files/pptpd.conf

@@ -0,0 +1,5 @@
+#debug
+option /etc/ppp/options.pptpd
+speed 115200
+stimeout 10
+#localip & remoteip are not needed, ip management is done by pppd

net/pptpd/files/pptpd.config

@@ -0,0 +1,8 @@
+config service 'pptpd'
+	option 'enabled' '0'
+	option 'localip' '192.168.0.1'
+	option 'remoteip' '192.168.0.20-30'
+
+config 'login'
+	option 'username' 'youruser'
+	option 'password' 'yourpass'

net/pptpd/files/pptpd.init

@@ -0,0 +1,63 @@
+#!/bin/sh /etc/rc.common
+# Copyright (C) 2015 OpenWrt.org
+
+START=60
+USE_PROCD=1
+
+BIN=/usr/sbin/pptpd
+CONFIG=/var/etc/pptpd.conf
+CHAP_SECRETS=/var/etc/chap-secrets
+
+validate_login_section() {
+	uci_validate_section pptpd login "${1}" \
+		'username:string' \
+		'password:string'
+}
+
+validate_pptpd_section() {
+	uci_validate_section pptpd service "${1}" \
+		'enabled:uinteger' \
+		'localip:string' \
+		'remoteip:string'
+}
+
+setup_login() {
+	validate_login_section "${1}" || {
+		echo "validation failed"
+		return 1
+	}
+
+	[ -n "${username}" ] || return 0
+	[ -n "${password}" ] || return 0
+
+	echo "${username} pptp-server ${password} *" >> $CHAP_SECRETS
+}
+
+setup_config() {
+	validate_pptpd_section "${1}" || {
+		echo "validation failed"
+		return 1
+	}
+
+	[ "$enabled" -eq 0 ] && return 1
+
+	mkdir -p /var/etc
+	cp /etc/pptpd.conf $CONFIG
+
+	[ -n "$localip" ] && echo "localip  $localip" >> $CONFIG
+	[ -n "$remoteip" ] && echo "remoteip  $remoteip" >> $CONFIG
+
+	return 0
+}
+
+start_service() {
+	config_load pptpd
+	setup_config pptpd || return
+	config_foreach setup_login login
+
+	ln -sfn $CHAP_SECRETS /etc/ppp/chap-secrets
+
+	procd_open_instance
+	procd_set_param command $BIN -c $CONFIG
+	procd_close_instance
+}