disable the MSS fixup hack by default (most ISPs don't require this as a workaround...

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@13788 3c298f89-4303-0410-b956-a3cf2f4a3e73

diff --git a/package/firewall/files/firewall.config b/package/firewall/files/firewall.config
index e903519..16d688e 100755 (executable)
--- a/package/firewall/files/firewall.config
+++ b/package/firewall/files/firewall.config
@@ -21,6 +21,11 @@ config forwarding
        option src      lan
        option dest     wan
 
+## Enable this option if you encounter any MTU problems
+## e.g. some websites work, others do not, submitting
+## forms causes problems, ...
+#      option mtu_fix  1
+
 
 ### EXAMPLE CONFIG SECTIONS
 # do not allow a specific ip to access wan

diff --git a/package/firewall/files/uci_firewall.sh b/package/firewall/files/uci_firewall.sh
index f46a533..41b2b5f 100755 (executable)
--- a/package/firewall/files/uci_firewall.sh
+++ b/package/firewall/files/uci_firewall.sh
@@ -41,6 +41,7 @@ create_zone() {
        config_set $ZONE_LIST $1 1 
 
        $IPTABLES -N zone_$1
+       $IPTABLES -N zone_$1_MSSFIX
        $IPTABLES -N zone_$1_ACCEPT
        $IPTABLES -N zone_$1_DROP
        $IPTABLES -N zone_$1_REJECT
@@ -60,6 +61,7 @@ addif() {
        [ -n "$dev" -a "$dev" == "$1" ] && return
        logger "adding $1 to firewall zone $2"
        $IPTABLES -A input -i $1 -j zone_$2
+       $IPTABLES -I zone_$2_MSSFIX 1 -o $1 -p tcp --tcp-flags SYN,RST SYN -j TCPMSS --clamp-mss-to-pmtu
        $IPTABLES -I zone_$2_ACCEPT 1 -o $1 -j ACCEPT
        $IPTABLES -I zone_$2_DROP 1 -o $1 -j DROP
        $IPTABLES -I zone_$2_REJECT 1 -o $1 -j reject
@@ -147,7 +149,6 @@ fw_defaults() {
        $IPTABLES -A OUTPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
        
        $IPTABLES -A FORWARD -m state --state INVALID -j DROP
-       $IPTABLES -A FORWARD -p tcp --tcp-flags SYN,RST SYN -j TCPMSS --clamp-mss-to-pmtu
        $IPTABLES -A FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT
        
        $IPTABLES -A INPUT -i lo -j ACCEPT
@@ -250,9 +251,11 @@ fw_forwarding() {
 
        config_get src $1 src
        config_get dest $1 dest
+       config_get_bool mtu_fix $1 mtu_fix 0
        [ -n "$src" ] && z_src=zone_${src}_forward || z_src=forward
        [ -n "$dest" ] && z_dest=zone_${dest}_ACCEPT || z_dest=ACCEPT
        $IPTABLES -I $z_src 1 -j $z_dest
+       [ "$mtu_fix" -gt 0 -a -n "$dest" ] && $IPTABLES -I $z_src 1 -j zone_${dest}_MSSFIX
 }
 
 fw_redirect() {