# Copyright (C) 2009-2010 OpenWrt.org fw_configure_interface() { local iface=$1 local action=$2 local ifname=$3 local aliasnet=$4 [ "$action" == "add" ] && { local status=$(uci_get_state network "$iface" up 0) [ "$status" == 1 ] || [ -n "$aliasnet" ] || return 0 } [ -n "$ifname" ] || { ifname=$(uci_get_state network "$iface" ifname "$iface") ifname="${ifname%%:*}" } [ "$ifname" == "lo" ] && return 0 fw_callback pre interface fw__do_rules() { local action=$1 local zone=$2 local chain=zone_${zone} local ifname=$3 local subnet=$4 local inet onet local mode=$(fw_get_family_mode x $zone i) case "$mode/$subnet" in # Zone supports v6 only or dual, need v6 6/*:*|i/*:*) inet="{ -s $subnet -d ::/0 }" onet="{ -s ::/0 -d $subnet }" mode=6 ;; # Zone supports v4 only or dual, need v4 4/*.*.*.*|i/*.*.*.*) inet="{ -s $subnet -d 0.0.0.0/0 }" onet="{ -s 0.0.0.0/0 -d $subnet }" mode=4 ;; # Need v6 while zone is v4 */*:*) fw_log info "zone $zone does not support IPv6 address family, skipping"; return ;; # Need v4 while zone is v6 */*.*) fw_log info "zone $zone does not support IPv4 address family, skipping"; return ;; esac fw $action $mode f ${chain}_ACCEPT ACCEPT ^ $onet { -o "$ifname" } fw $action $mode f ${chain}_ACCEPT ACCEPT ^ $inet { -i "$ifname" } fw $action $mode f ${chain}_DROP DROP ^ $onet { -o "$ifname" } fw $action $mode f ${chain}_DROP DROP ^ $inet { -i "$ifname" } fw $action $mode f ${chain}_REJECT reject ^ $onet { -o "$ifname" } fw $action $mode f ${chain}_REJECT reject ^ $inet { -i "$ifname" } fw $action $mode n ${chain}_nat MASQUERADE ^ $onet { -o "$ifname" } fw $action $mode f ${chain}_MSSFIX TCPMSS ^ $onet { -o "$ifname" -p tcp --tcp-flags SYN,RST SYN --clamp-mss-to-pmtu } fw $action $mode f input ${chain} $ $inet { -i "$ifname" } fw $action $mode f forward ${chain}_forward $ $inet { -i "$ifname" } fw $action $mode n PREROUTING ${chain}_prerouting ^ $inet { -i "$ifname" } fw $action $mode r PREROUTING ${chain}_notrack ^ $inet { -i "$ifname" } } local old_zones old_ifname old_subnets config_get old_zones core "${iface}_zone" [ -n "$old_zones" ] && { config_get old_ifname core "${iface}_ifname" config_get old_subnets core "${iface}_subnets" local z for z in $old_zones; do local n for n in ${old_subnets:-""}; do fw_log info "removing $iface ($old_ifname${n:+ alias $n}) from zone $z" fw__do_rules del $z $old_ifname $n done [ -n "$old_subnets" ] || ACTION=remove ZONE="$z" INTERFACE="$iface" DEVICE="$ifname" /sbin/hotplug-call firewall done local old_aliases config_get old_aliases core "${iface}_aliases" local a for a in $old_aliases; do fw_configure_interface "$a" del "$old_ifname" done uci_revert_state firewall core "${iface}_zone" uci_revert_state firewall core "${iface}_ifname" uci_revert_state firewall core "${iface}_subnets" uci_revert_state firewall core "${iface}_aliases" } [ "$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${aliasnet:+ alias $aliasnet}) to zone $zone_name" fw__do_rules add ${zone_name} "$ifname" $aliasnet append new_zones $zone_name [ -n "$aliasnet" ] || ACTION=add ZONE="$zone_name" INTERFACE="$iface" DEVICE="$ifname" /sbin/hotplug-call firewall } config_foreach load_zone zone [ -z "$aliasnet" ] && { local aliases config_get aliases "$iface" aliases local a for a in $aliases; do local ipaddr netmask ip6addr config_get ipaddr "$a" ipaddr config_get netmask "$a" netmask config_get ip6addr "$a" ip6addr [ -n "$ipaddr" ] && fw_configure_interface "$a" add "" "$ipaddr${netmask:+/$netmask}" [ -n "$ip6addr" ] && fw_configure_interface "$a" add "" "$ip6addr" done fw_sysctl_interface $ifname fw_callback post interface uci_set_state firewall core "${iface}_aliases" "$aliases" } || { local subnets= config_get subnets core "${iface}_subnets" append subnets "$aliasnet" config_set core "${iface}_subnets" "$subnets" uci_set_state firewall core "${iface}_subnets" "$subnets" } uci_set_state firewall core "${iface}_zone" "$new_zones" uci_set_state firewall core "${iface}_ifname" "$ifname" } 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 }