large init script cleanup and merge of whiterussian changes, new dnsmasq config handling

git-svn-id: svn://svn.openwrt.org/openwrt/trunk/openwrt@3588 3c298f89-4303-0410-b956-a3cf2f4a3e73

package/base-files/default/usr/lib/common.awk

@@ -0,0 +1,66 @@
+function portstr(type, str) {
+	gsub(/-/, ":", str)
+	if (insmod_mport != 1) {
+		print "insmod ipt_multiport >&- 2>&-"
+		insmod_mport = 1
+	}
+	if (type == "src") return " -m multiport --sports " str
+	else return " -m multiport --dports " str
+}
+
+function str2ipt(str) {
+	str2data(str)
+	_cmd = ""
+	if (_l["src"] != "") _cmd = _cmd " -s " _l["src"]
+	if (_l["dest"] != "") _cmd = _cmd " -d " _l["dest"]
+	if (_l["proto"] != "") {
+		_cmd = _cmd " -p " _l["proto"]
+	}
+	# scripts need to check for proto="" and emit two rules in that case
+	if ((_l["proto"] == "") || (_l["proto"] == "tcp") || (_l["proto"] == "udp")) {
+		if (_l["sport"] != "") _cmd = _cmd portstr("src", _l["sport"])
+		if (_l["dport"] != "") _cmd = _cmd portstr("dest", _l["dport"])
+	}
+	if (_l["layer7"] != "") {
+		if (insmod_l7 != 1) {
+			print "insmod ipt_layer7 >&- 2>&-"
+			insmod_l7 = 1
+		}
+		_cmd = _cmd " -m layer7 --l7proto " _l["layer7"]
+	}
+	return _cmd
+}
+
+function str2data(str) {
+	delete _l
+	_n = split(str, _o, "[\t ]")
+	for (_i = 1; _i <= _n; _i++) {
+		_n2 = split(_o[_i], _c, "=")
+		if (_n2 == 2) _l[_c[1]] = _c[2]
+	}
+}
+
+function bitcount(c) {
+	c=and(rshift(c, 1),0x55555555)+and(c,0x55555555)
+	c=and(rshift(c, 2),0x33333333)+and(c,0x33333333)
+	c=and(rshift(c, 4),0x0f0f0f0f)+and(c,0x0f0f0f0f)
+	c=and(rshift(c, 8),0x00ff00ff)+and(c,0x00ff00ff)
+	c=and(rshift(c,16),0x0000ffff)+and(c,0x0000ffff)
+	return c
+}
+
+function validate_netmask(nm) {
+	return and(-nm,compl(nm))
+}
+
+function ip2int(ip) {
+	for (ret=0,n=split(ip,a,"\."),x=1;x<=n;x++) ret=or(lshift(ret,8),a[x]) 
+	return ret
+}
+
+function int2ip(ip,ret,x) {
+	ret=and(ip,255)
+	ip=rshift(ip,8)
+	for(;x<3;ret=and(ip,255)"."ret,ip=rshift(ip,8),x++);
+	return ret
+}

package/base-files/default/usr/lib/parse-config.awk

@@ -0,0 +1,40 @@
+{
+	line=$0
+	gsub(/^[ \t]*/, "")
+	gsub(/[ \t]*$/, "")
+}
+
+$1 == "@define" {
+	v[$2] = $3
+}
+
+$1 == "@ifdef" {
+	if_open = 1
+	if (v[$2] != "") noprint = 0
+	else noprint = 1
+}
+
+$1 == "@ifndef" {
+	if_open = 1
+	if (v[$2] != "") noprint = 1
+	else noprint = 0
+}
+
+$1 == "@else" {
+	if (noprint == 1) noprint = 0
+	else noprint = 1
+}
+
+($1 !~ /^@/) && (noprint != 1) {
+	n=split(line "@@", a, /@@/)
+	for (i=1; i<=n; i++) {
+		if ((i % 2) == 1) printf a[i]
+		else printf v[a[i]]
+	}
+	print ""
+}
+
+$1 == "@endif" {
+	if_open = 0
+	noprint = 0
+}

package/base-files/default/usr/share/udhcpc/default.script

@@ -1,18 +1,17 @@
 #!/bin/sh
 [ -z "$1" ] && echo "Error: should be run by udhcpc" && exit 1
+. /etc/config/network
 
 RESOLV_CONF="/tmp/resolv.conf"
 
 hotplug_event() {
-	nvram show 2>&- | grep _proto=dhcp | {
-		while :; do
-			read FOO
-			[ -z "$FOO" ] && break
-			FOO="${FOO%%_*}"
-			[ "$(nvram get ${FOO}_ifname)" = "${interface}" ] || continue
-			env -i ACTION="$1" INTERFACE="${FOO}" PROTO=dhcp /sbin/hotplug iface
-		done
-	}
+	for ifname in lan wan wifi ${ifnames}; do
+		eval "proto=\"\${${ifname}_proto}\""
+		eval "if=\"\${${ifname}_ifname}\""
+		[ "$proto" = "dhcp" ] || continue
+		[ "$if" = "$interface" ] || continue
+		env -i ACTION="$1" INTERFACE="$ifname" PROTO=dhcp /sbin/hotplug iface
+	done
 }
 
 case "$1" in
@@ -26,22 +25,20 @@ case "$1" in
 		broadcast ${broadcast:-+}
 
 		if [ -n "$router" ] ; then
-
-			if [ "$router" != "$(route -n | grep '^0.0.0.0' | grep $interface | awk '{ print $2 }')" ] ; then
-				while route del default gw 0.0.0.0 dev $interface 2>&- ; do
-					echo "removing old default route"
-				done				
-				for i in $router ; do
-					route add default gw $i dev $interface
-				done
-			fi
+			echo "deleting routers"
+			while route del default gw 0.0.0.0 dev $interface >&- 2>&- ; do :; done
+					
+			for i in $router ; do
+				echo "adding router $i"
+				route add default gw $i dev $interface
+			done
 		fi
 
 		echo -n > $RESOLV_CONF
 		${domain:+echo search $domain} >> $RESOLV_CONF
 		for i in $dns ; do
-			echo adding dns $i
-			echo nameserver $i >> $RESOLV_CONF
+			echo "adding dns $i"
+			echo "nameserver $i" >> $RESOLV_CONF
 		done
 		
 		hotplug_event ifup