openconnect: allow specify --protocol from config

openconnect v8.10 supports 4 VPN protocols

  --protocol=anyconnect  Compatible with Cisco AnyConnect SSL VPN, as well as ocserv (default)
  --protocol=nc          Compatible with Juniper Network Connect
  --protocol=gp          Compatible with Palo Alto Networks (PAN) GlobalProtect SSL VPN
  --protocol=pulse       Compatible with Pulse Connect Secure SSL VPN

This patch allows user to specify protocol use the new "vpn_protocol"
option and deprecate the old option "juniper" which seems to be missing in
the current openconnect client.

Signed-off-by: Mengyang Li <mayli.he@gmail.com>

net/openconnect/Makefile

@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=openconnect
 PKG_VERSION:=8.10
-PKG_RELEASE:=1
+PKG_RELEASE:=2
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
 PKG_SOURCE_URL:=ftp://ftp.infradead.org/pub/openconnect/

net/openconnect/README

@@ -32,8 +32,15 @@ config interface 'MYVPN'
 	#option token_mode 'script'
 	#option token_script '/lib/custom/getocpass.sh'
 
-	# Juniper vpn support
-	#option juniper '1'
+	# For non-anyconnect vpn protocols
+	# Cisco AnyConnect (default)
+	#option vpn_protocol 'anyconnect'
+	# Juniper Network Connect
+	#option vpn_protocol 'nc'
+	# Palo Alto Networks GlobalProtect
+	#option vpn_protocol 'gp'
+	# Pulse Connect Secure
+	#option vpn_protocol 'pulse'
 
 	# Authentication form responses
 	#list form_entry FORM:OPT=VAL

net/openconnect/files/openconnect.sh

@@ -15,6 +15,7 @@ proto_openconnect_init_config() {
 	proto_config_add_int "port"
 	proto_config_add_int "mtu"
 	proto_config_add_int "juniper"
+	proto_config_add_string "vpn_protocol"
 	proto_config_add_boolean "no_dtls"
 	proto_config_add_string "interface"
 	proto_config_add_string "username"
@@ -46,6 +47,7 @@ proto_openconnect_setup() {
 		form_entry \
 		interface \
 		juniper \
+		vpn_protocol \
 		mtu \
 		no_dtls \
 		os \
@@ -93,6 +95,10 @@ proto_openconnect_setup() {
 		append_args --juniper
 	fi
 
+	[ -n "$vpn_protocol" ] && {
+		append_args --protocol "$vpn_protocol"
+	}
+
 	[ -n "$serverhash" ] && {
 		append_args "--servercert=$serverhash"
 		append_args --no-system-trust