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# 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
}
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