upgrade dnsmasq to latest version, rewrite dnsmasq init script for uci, rename /bin/ipcalc to /bin/ipcalc.sh (fixes #1452)

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@6595 3c298f89-4303-0410-b956-a3cf2f4a3e73

package/dnsmasq/Makefile

@@ -9,12 +9,12 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=dnsmasq
-PKG_VERSION:=2.35
+PKG_VERSION:=2.38
 PKG_RELEASE:=1
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
 PKG_SOURCE_URL:=http://thekelleys.org.uk/dnsmasq
-PKG_MD5SUM:=57b8643dc394cf2fbd1bced64536c6df
+PKG_MD5SUM:=ab066a97c226066485ad20e5ad5ce424
 
 include $(INCLUDE_DIR)/package.mk
 
@@ -42,7 +42,8 @@ endef
 define Package/dnsmasq/install
 	$(INSTALL_DIR) $(1)/usr/sbin
 	$(INSTALL_BIN) $(PKG_BUILD_DIR)/src/dnsmasq $(1)/usr/sbin/
-	$(INSTALL_DIR) $(1)/etc
+	$(INSTALL_DIR) $(1)/etc/config
+	$(INSTALL_DATA) ./files/dhcp.conf $(1)/etc/config/dhcp
 	$(INSTALL_DATA) ./files/dnsmasq.conf $(1)/etc/dnsmasq.conf
 	$(INSTALL_DIR) $(1)/etc/init.d
 	$(INSTALL_BIN) ./files/dnsmasq.init $(1)/etc/init.d/dnsmasq

package/dnsmasq/files/dhcp.conf

@@ -0,0 +1,9 @@
+config dhcp
+	option interface	lan
+	option start 	100
+	option limit	150
+	option leasetime	12h
+
+config dhcp
+	option interface	wan
+	option ignore	1

package/dnsmasq/files/dnsmasq.conf

@@ -10,14 +10,8 @@ domain=lan
 expand-hosts
 resolv-file=/tmp/resolv.conf.auto
 
-@ifdef dhcp_enable
-dhcp-range=@@start@@,@@end@@,@@netmask@@,@@lease@@
 dhcp-authoritative
 dhcp-leasefile=/tmp/dhcp.leases
-@endif
-@ifdef wan_ifname
-except-interface=@@wan_ifname@@
-@endif
 
 # use /etc/ethers for static hosts; same format as --dhcp-host
 # <hwaddr> <ipaddr>

package/dnsmasq/files/dnsmasq.init

@@ -2,55 +2,67 @@
 # Copyright (C) 2006 OpenWrt.org
 
 START=60
+
+dhcp_calc() {
+	local ip="$1"
+	local res=0
+	
+	while [ -n "$ip" ]; do
+		part="${ip%%.*}"
+		res="$(($res * 256))"
+		res="$(($res + $part))"
+		[ "${ip%.*}" != "$ip" ] && ip="${ip#*.}" || ip=
+	done
+	echo "$res"
+}
+
+dhcp_add() {
+	local cfg="$1"
+
+	config_get net "$cfg" interface
+	[ -n "$net" ] || return 0
+	
+	config_get ifname "$net" ifname
+	[ -n "$ifname" ] || return 0
+	
+	config_get_bool ignore "$cfg" ignore
+	[ "$ignore" -gt 0 ] && {
+		append args "-I $ifname"
+		return 0
+	}
+	
+	config_get proto "$net" proto
+	[ static = "$proto" ] || return 0
+	
+	config_get ipaddr "$net" ipaddr
+	config_get netmask "$net" netmask
+
+	# check for an already active dhcp server on the interface, unless 'force' is set
+	config_get_bool force "$cfg" force 0
+	[ "$force" -gt 0 ] || {
+		udhcpc -n -q -R -s /bin/true -i $ifname >&- && return 0
+	}
+	
+	config_get start "$cfg" start
+	config_get end "$cfg" end
+	config_get leasetime "$cfg" leasetime
+
+	leasetime="${leasetime:-12h}"
+	start="$(dhcp_calc "${start:-100}")"
+	end="$((${end:-150} + 1))"
+	eval "$(ipcalc.sh $ipaddr $netmask $start $end)"
+	append args "-F $START,$END,$NETMASK,$leasetime"	
+}
+
 start() {
 	include /lib/network
 	scan_interfaces
-	
+	config_load dhcp
-	# The following is to automatically configure the DHCP settings
+
-	# based on config settings. Feel free to replace all this crap
-	# with a simple "dnsmasq" and manage everything via the
-	# /etc/dnsmasq.conf config file
-	
-	[ -f /etc/dnsmasq.conf ] || exit
-	
 	args=""
-	iface=lan
+	config_foreach dhcp_add dhcp
-	config_get ifname "$iface" ifname
-	config_get proto "$iface" proto
 	
-	[ "$proto" = static ] && dhcp_enable="${dhcp_enable:-1}"
+	dnsmasq $args && {
-	dhcp_start="${dhcp_start:-100}"
-	dhcp_num="${dhcp_num:-50}"
-	dhcp_lease="${dhcp_lease:-12h}"
-	
-	# if dhcp_enable is unset and there is a dhcp server on the network already, default to dhcp_enable=0
-	[ -z "$dhcp_enable" ] && udhcpc -n -q -R -s /bin/true -i $ifname >&- && dhcp_enable="${dhcp_enable:-0}"
-	
-	# dhcp_enable=0 disables the dhcp server
-	(
-		[ -z "$dhcp_enable" -o "$dhcp_enable" -eq 1 ] && {
-			# no existing DHCP server?
-	
-			# calculate settings
-			config_get ipaddr "$iface" ipaddr
-			config_get netmask "$iface" netmask
-			eval $(ipcalc $ipaddr $netmask ${dhcp_start:-100} ${dhcp_num:-150})
-			
-			# and pass the args via config parser defines
-			echo "${dhcp_enable:+@define dhcp_enable 1}"
-			echo "@define netmask $NETMASK"
-			echo "@define start $START"
-			echo "@define end $END"
-			echo "@define lease ${dhcp_lease:-12h}"
-		}
-	
-		# ignore requests from wan interface
-		config_get wan_proto wan proto
-		config_get wan_ifname wan ifname
-		[ -z "$wan_proto" -o "$wan_proto" = "none" ] || echo "@define wan_ifname $wan_ifname"
-	
-		cat /etc/dnsmasq.conf
-	) | awk -f /lib/config/template.awk | dnsmasq -C /proc/self/fd/0 && {
 		rm -f /tmp/resolv.conf
 		cat > /tmp/resolv.conf <<EOF
 nameserver 127.0.0.1