firewall: make invalid redirects and duplicate zones non-fatal, print a notice and discard them

SVN-Revision: 23080

package/firewall/Makefile

@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 PKG_NAME:=firewall
 
 PKG_VERSION:=2
-PKG_RELEASE:=15
+PKG_RELEASE:=16
 
 include $(INCLUDE_DIR)/package.mk
 

package/firewall/files/lib/core.sh

@@ -107,10 +107,8 @@ fw_die() {
 
 fw_log() {
 	local level="$1"
-	[ -n "$2" ] || {
-		shift
-		level=notice
-	}
+	[ -n "$2" ] && shift || level=notice
+	[ "$level" != error ] || echo "Error: $@" >&2
 	logger -t firewall -p user.$level "$@"
 }
 

package/firewall/files/lib/core_init.sh

@@ -42,7 +42,7 @@ fw_load_defaults() {
 		boolean disable_ipv6 0 \
 	} || return
 	[ -n "$FW_DEFAULTS_APPLIED" ] && {
-		echo "Error: multiple defaults sections detected"
+		fw_log error "duplicate defaults section detected, skipping"
 		return 1
 	}
 	FW_DEFAULTS_APPLIED=1
@@ -159,7 +159,8 @@ fw_load_zone() {
 	fw_config_get_zone "$1"
 
 	list_contains FW_ZONES $zone_name && {
-		fw_die "zone ${zone_name}: duplicated zone"
+		fw_log error "zone ${zone_name}: duplicated zone, skipping"
+		return 0
 	}
 	append FW_ZONES $zone_name
 

package/firewall/files/lib/core_redirect.sh

@@ -30,7 +30,8 @@ fw_load_redirect() {
 	local fwdchain natchain natopt nataddr natports srcdaddr srcdports
 	if [ "$redirect_target" == "DNAT" ]; then
 		[ -n "$redirect_src" -a -n "$redirect_dest_ip$redirect_dest_port" ] || {
-			fw_die "DNAT redirect ${redirect_name}: needs src and dest_ip or dest_port"
+			fw_log error "DNAT redirect ${redirect_name}: needs src and dest_ip or dest_port, skipping"
+			return 0
 		}
 
 		fwdchain="zone_${redirect_src}_forward"
@@ -48,7 +49,8 @@ fw_load_redirect() {
 
 	elif [ "$redirect_target" == "SNAT" ]; then
 		[ -n "$redirect_dest" -a -n "$redirect_src_dip" ] || {
-			fw_die "SNAT redirect ${redirect_name}: needs dest and src_dip"
+			fw_log error "SNAT redirect ${redirect_name}: needs dest and src_dip, skipping"
+			return 0
 		}
 
 		fwdchain="${redirect_src:+zone_${redirect_src}_forward}"
@@ -65,7 +67,8 @@ fw_load_redirect() {
 			append FW_CONNTRACK_ZONES $redirect_dest
 
 	else
-		fw_die "redirect ${redirect_name}: target must be either DNAT or SNAT"
+		fw_log error "redirect ${redirect_name}: target must be either DNAT or SNAT, skipping"
+		return 0
 	fi
 
 	local mode