[package] firewall:

[openwrt.git] / package / firewall / files / lib / core_interface.sh

diff --git a/package/firewall/files/lib/core_interface.sh b/package/firewall/files/lib/core_interface.sh
new file mode 100644 (file)
index 0000000..9da6739
--- /dev/null
+++ b/package/firewall/files/lib/core_interface.sh
@@ -0,0 +1,86 @@
+# Copyright (C) 2009-2010 OpenWrt.org
+
+fw_configure_interface() {
+       local iface=$1
+       local action=$2
+       local ifname=$3
+
+       local status;
+       config_get_bool status "$iface" up "0"
+       [ "$status" == 1 ] || return 0
+
+       [ -n "$ifname" ] || {
+               config_get ifname "$iface" ifname
+               ifname=${ifname:-$iface}
+       }
+       [ "$ifname" == "lo" ] && return 0
+
+       fw_callback pre interface
+
+       fw__do_rules() {
+               local action=$1
+               local chain=$2
+               local ifname=$3
+
+               fw $action i f ${chain}_ACCEPT ACCEPT ^ { -o "$ifname" }
+               fw $action i f ${chain}_ACCEPT ACCEPT ^ { -i "$ifname" }
+               fw $action i f ${chain}_DROP   DROP   ^ { -o "$ifname" }
+               fw $action i f ${chain}_DROP   DROP   ^ { -i "$ifname" }
+               fw $action i f ${chain}_REJECT reject ^ { -o "$ifname" }
+               fw $action i f ${chain}_REJECT reject ^ { -i "$ifname" }
+
+               fw $action i n ${chain}_nat MASQUERADE ^ { -o "$ifname" }
+               fw $action i f ${chain}_MSSFIX TCPMSS  ^ { -o "$ifname" -p tcp --tcp-flags SYN,RST SYN --clamp-mss-to-pmtu }
+
+               fw $action i f input   ${chain}         $ { -i "$ifname" }
+               fw $action i f forward ${chain}_forward $ { -i "$ifname" }
+               fw $action i n PREROUTING ${chain}_prerouting ^ { -i "$ifname" }
+               fw $action i r PREROUTING ${chain}_notrack    ^ { -i "$ifname" }
+       }
+
+       local old_zones old_ifname
+       config_get old_zones core "${iface}_zone"
+       [ -n "$old_zones" ] && {
+               config_get old_ifname core "${iface}_ifname"
+               for z in $old_zones; do
+                       fw_log info "removing $iface ($old_ifname) from zone $z"
+                       fw__do_rules del zone_$z $old_ifname
+
+                       ACTION=remove ZONE="$z" INTERFACE="$iface" DEVICE="$ifname" /sbin/hotplug-call firewall
+               done
+               uci_revert_state firewall core "${iface}_zone"
+               uci_revert_state firewall core "${iface}_ifname"
+       }
+       [ "$action" == del ] && return
+
+       local new_zones
+       load_zone() {
+               fw_config_get_zone "$1"
+               list_contains zone_network "$iface" || return
+
+               fw_log info "adding $iface ($ifname) to zone $zone_name"
+               fw__do_rules add zone_${zone_name} "$ifname"
+               append new_zones $zone_name
+
+               ACTION=add ZONE="$zone_name" INTERFACE="$iface" DEVICE="$ifname" /sbin/hotplug-call firewall
+       }
+       config_foreach load_zone zone
+
+       uci_set_state firewall core "${iface}_zone" "$new_zones"
+       uci_set_state firewall core "${iface}_ifname" "$ifname"
+
+       fw_sysctl_interface $ifname
+
+       fw_callback post interface
+}
+
+fw_sysctl_interface() {
+       local ifname=$1
+       {
+               sysctl -w net.ipv4.conf.${ifname}.accept_redirects=$FW_ACCEPT_REDIRECTS
+               sysctl -w net.ipv6.conf.${ifname}.accept_redirects=$FW_ACCEPT_REDIRECTS
+               sysctl -w net.ipv4.conf.${ifname}.accept_source_route=$FW_ACCEPT_SRC_ROUTE
+               sysctl -w net.ipv6.conf.${ifname}.accept_source_route=$FW_ACCEPT_SRC_ROUTE
+       } >/dev/null 2>/dev/null
+}
+