From 0e540ec90d9a689ed6417334bb9ec4882da06cfd Mon Sep 17 00:00:00 2001
From: Jo-Philipp Wich <jow@openwrt.org>
Date: Sat, 19 May 2012 20:17:56 +0000
Subject: [PATCH] dnsmasq: allow forcing options

The option 'force' when set to '1' will transform a dhcp-option to dhcp-option-force instead in the config.

This is useful for forcing options to be sent back to a client (even options it didn't ask for).

Signed-off-by: Philip Prindeville <philipp@redfish-solutions.com>

SVN-Revision: 31816
---
 package/dnsmasq/files/dnsmasq.init | 33 ++++++++++++++++++++++--------
 1 file changed, 25 insertions(+), 8 deletions(-)

diff --git a/package/dnsmasq/files/dnsmasq.init b/package/dnsmasq/files/dnsmasq.init
index f3d438e209..92e10ee494 100644
--- a/package/dnsmasq/files/dnsmasq.init
+++ b/package/dnsmasq/files/dnsmasq.init
@@ -157,7 +157,9 @@ dhcp_subscrid_add() {
 
 	xappend "--dhcp-subscrid=$networkid,$subscriberid"
 
-	dhcp_option_add "$cfg" "$networkid"
+	config_get_bool force "$cfg" force 0
+
+	dhcp_option_add "$cfg" "$networkid" "$force"
 }
 
 dhcp_remoteid_add() {
@@ -171,7 +173,9 @@ dhcp_remoteid_add() {
 
 	xappend "--dhcp-remoteid=$networkid,$remoteid"
 
-	dhcp_option_add "$cfg" "$networkid"
+	config_get_bool force "$cfg" force 0
+
+	dhcp_option_add "$cfg" "$networkid" "$force"
 }
 
 dhcp_circuitid_add() {
@@ -185,7 +189,9 @@ dhcp_circuitid_add() {
 
 	xappend "--dhcp-circuitid=$networkid,$circuitid"
 
-	dhcp_option_add "$cfg" "$networkid"
+	config_get_bool force "$cfg" force 0
+
+	dhcp_option_add "$cfg" "$networkid" "$force"
 }
 
 dhcp_userclass_add() {
@@ -199,7 +205,9 @@ dhcp_userclass_add() {
 
 	xappend "--dhcp-userclass=$networkid,$userclass"
 
-	dhcp_option_add "$cfg" "$networkid"
+	config_get_bool force "$cfg" force 0
+
+	dhcp_option_add "$cfg" "$networkid" "$force"
 }
 
 dhcp_vendorclass_add() {
@@ -213,14 +221,18 @@ dhcp_vendorclass_add() {
 
 	xappend "--dhcp-vendorclass=$networkid,$vendorclass"
 
-	dhcp_option_add "$cfg" "$networkid"
+	config_get_bool force "$cfg" force 0
+
+	dhcp_option_add "$cfg" "$networkid" "$force"
 }
 
 dhcp_host_add() {
 	local cfg="$1"
 
+	config_get_bool force "$cfg" force 0
+
 	config_get networkid "$cfg" networkid
-	[ -n "$networkid" ] && dhcp_option_add "$cfg" "$networkid"
+	[ -n "$networkid" ] && dhcp_option_add "$cfg" "$networkid" "$force"
 
 	config_get name "$cfg" name
 	config_get ip "$cfg" ip
@@ -282,7 +294,9 @@ dhcp_boot_add() {
 
 	xappend "--dhcp-boot=${networkid:+net:$networkid,}$filename,$servername,$serveraddress"
 
-	dhcp_option_add "$cfg" "$networkid"
+	config_get_bool force "$cfg" force 0
+
+	dhcp_option_add "$cfg" "$networkid" "$force"
 }
 
 
@@ -342,10 +356,13 @@ dhcp_add() {
 dhcp_option_add() {
 	local cfg="$1"
 	local networkid="$2"
+	local force="$3"
+
+	[ "$force" = "0" ] && force=
 
 	config_get dhcp_option "$cfg" dhcp_option
 	for o in $dhcp_option; do
-		xappend "--dhcp-option=$networkid","$o"
+		xappend "--dhcp-option${force:+-force}=$networkid","$o"
 	done
 
 }