From f90328f26ef73fc5a0c2d9a751936e9af060ccba Mon Sep 17 00:00:00 2001
From: Jo-Philipp Wich <jow@openwrt.org>
Date: Thu, 16 Sep 2010 11:47:35 +0000
Subject: [PATCH] firewall: make invalid redirects and duplicate zones
 non-fatal, print a notice and discard them

SVN-Revision: 23080
---
 package/firewall/Makefile                   | 2 +-
 package/firewall/files/lib/core.sh          | 6 ++----
 package/firewall/files/lib/core_init.sh     | 5 +++--
 package/firewall/files/lib/core_redirect.sh | 9 ++++++---
 4 files changed, 12 insertions(+), 10 deletions(-)

diff --git a/package/firewall/Makefile b/package/firewall/Makefile
index 8cf22e83489..93e41bf58f1 100644
--- a/package/firewall/Makefile
+++ b/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
 
diff --git a/package/firewall/files/lib/core.sh b/package/firewall/files/lib/core.sh
index c350e8f0f61..c383597810e 100644
--- a/package/firewall/files/lib/core.sh
+++ b/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 "$@"
 }
 
diff --git a/package/firewall/files/lib/core_init.sh b/package/firewall/files/lib/core_init.sh
index e1f80ba3fca..56e19b7b86e 100644
--- a/package/firewall/files/lib/core_init.sh
+++ b/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
 
diff --git a/package/firewall/files/lib/core_redirect.sh b/package/firewall/files/lib/core_redirect.sh
index 72364a99e95..3a37bb7ee6f 100644
--- a/package/firewall/files/lib/core_redirect.sh
+++ b/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
-- 
2.30.2