mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-12-11 22:05:20 +02:00
41db87f4cc
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@28669 3c298f89-4303-0410-b956-a3cf2f4a3e73
206 lines
5.6 KiB
Bash
206 lines
5.6 KiB
Bash
# Copyright (C) 2009-2011 OpenWrt.org
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fw__uci_state_add() {
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local var="$1"
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local item="$2"
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local val="$(uci_get_state firewall core $var)"
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local e1; for e1 in $item; do
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local e2; for e2 in $val; do
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[ "$e1" = "$e2" ] && e1=""
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done
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val="${val:+$val${e1:+ }}$e1"
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done
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uci_toggle_state firewall core $var "$val"
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}
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fw__uci_state_del() {
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local var="$1"
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local item="$2"
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local rest=""
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local val="$(uci_get_state firewall core $var)"
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local e1; for e1 in $val; do
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local e2; for e2 in $item; do
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[ "$e1" = "$e2" ] && e1=""
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done
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rest="${rest:+$rest${e1:+ }}$e1"
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done
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uci_toggle_state firewall core $var "$val"
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}
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fw_configure_interface() {
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local iface=$1
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local action=$2
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local ifname=$3
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local aliasnet=$4
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[ "$action" == "add" ] && {
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local status=$(uci_get_state network "$iface" up 0)
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[ "$status" == 1 ] || [ -n "$aliasnet" ] || return 0
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}
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[ -n "$ifname" ] || {
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ifname=$(uci_get_state network "$iface" ifname)
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ifname="${ifname%%:*}"
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[ -z "$ifname" ] && return 0
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}
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[ "$ifname" == "lo" ] && return 0
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fw_callback pre interface
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fw__do_rules() {
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local action=$1
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local zone=$2
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local chain=zone_${zone}
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local ifname=$3
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local subnet=$4
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local inet onet mode
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fw_get_family_mode mode x $zone i
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case "$mode/$subnet" in
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# Zone supports v6 only or dual, need v6
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G6/*:*|i/*:*)
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inet="-s $subnet -d ::/0"
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onet="-s ::/0 -d $subnet"
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mode=6
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;;
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# Zone supports v4 only or dual, need v4
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G4/*.*.*.*|i/*.*.*.*)
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inet="-s $subnet -d 0.0.0.0/0"
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onet="-s 0.0.0.0/0 -d $subnet"
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mode=4
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;;
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# Need v6 while zone is v4
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*/*:*) fw_log info "zone $zone does not support IPv6 address family, skipping"; return ;;
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# Need v4 while zone is v6
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*/*.*) fw_log info "zone $zone does not support IPv4 address family, skipping"; return ;;
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# Strip prefix
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*) mode="${mode#G}" ;;
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esac
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lock /var/run/firewall-interface.lock
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fw $action $mode f ${chain}_ACCEPT ACCEPT $ { -o "$ifname" $onet }
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fw $action $mode f ${chain}_ACCEPT ACCEPT $ { -i "$ifname" $inet }
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fw $action $mode f ${chain}_DROP DROP $ { -o "$ifname" $onet }
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fw $action $mode f ${chain}_DROP DROP $ { -i "$ifname" $inet }
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fw $action $mode f ${chain}_REJECT reject $ { -o "$ifname" $onet }
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fw $action $mode f ${chain}_REJECT reject $ { -i "$ifname" $inet }
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[ "$(uci_get_state firewall core "${zone}_tcpmss")" == 1 ] && \
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fw $action $mode m ${chain}_MSSFIX TCPMSS $ \
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{ -o "$ifname" -p tcp --tcp-flags SYN,RST SYN --clamp-mss-to-pmtu $onet }
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fw $action $mode f input ${chain} $ { -i "$ifname" $inet }
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fw $action $mode f forward ${chain}_forward $ { -i "$ifname" $inet }
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fw $action $mode n PREROUTING ${chain}_prerouting $ { -i "$ifname" $inet }
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fw $action $mode r PREROUTING ${chain}_notrack $ { -i "$ifname" $inet }
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fw $action $mode n POSTROUTING ${chain}_nat $ { -o "$ifname" $onet }
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lock -u /var/run/firewall-interface.lock
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}
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local old_zones old_ifname old_subnets
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config_get old_zones core "${iface}_zone"
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[ -n "$old_zones" ] && {
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config_get old_ifname core "${iface}_ifname"
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config_get old_subnets core "${iface}_subnets"
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local z
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for z in $old_zones; do
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local n
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for n in ${old_subnets:-""}; do
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fw_log info "removing $iface ($old_ifname${n:+ alias $n}) from zone $z"
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fw__do_rules del $z $old_ifname $n
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done
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[ -n "$old_subnets" ] || {
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fw__uci_state_del "${z}_networks" "$iface"
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env -i ACTION=remove ZONE="$z" INTERFACE="$iface" DEVICE="$ifname" /sbin/hotplug-call firewall
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}
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done
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local old_aliases
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config_get old_aliases core "${iface}_aliases"
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local a
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for a in $old_aliases; do
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fw_configure_interface "$a" del "$old_ifname"
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done
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uci_revert_state firewall core "${iface}_zone"
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uci_revert_state firewall core "${iface}_ifname"
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uci_revert_state firewall core "${iface}_subnets"
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uci_revert_state firewall core "${iface}_aliases"
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}
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[ "$action" == del ] && return
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[ -z "$aliasnet" ] && {
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local aliases
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config_get aliases "$iface" aliases
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local a
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for a in $aliases; do
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local ipaddr netmask ip6addr
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config_get ipaddr "$a" ipaddr
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config_get netmask "$a" netmask
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config_get ip6addr "$a" ip6addr
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[ -n "$ipaddr" ] && fw_configure_interface "$a" add "" "$ipaddr${netmask:+/$netmask}"
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[ -n "$ip6addr" ] && fw_configure_interface "$a" add "" "$ip6addr"
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done
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fw_sysctl_interface $ifname
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fw_callback post interface
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uci_toggle_state firewall core "${iface}_aliases" "$aliases"
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} || {
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local subnets=
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config_get subnets core "${iface}_subnets"
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append subnets "$aliasnet"
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config_set core "${iface}_subnets" "$subnets"
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uci_toggle_state firewall core "${iface}_subnets" "$subnets"
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}
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local new_zones=
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load_zone() {
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fw_config_get_zone "$1"
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list_contains zone_network "$iface" || return
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fw_log info "adding $iface ($ifname${aliasnet:+ alias $aliasnet}) to zone $zone_name"
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fw__do_rules add ${zone_name} "$ifname" "$aliasnet"
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append new_zones $zone_name
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[ -n "$aliasnet" ] || {
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fw__uci_state_add "${zone_name}_networks" "${zone_network}"
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env -i ACTION=add ZONE="$zone_name" INTERFACE="$iface" DEVICE="$ifname" /sbin/hotplug-call firewall
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}
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}
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config_foreach load_zone zone
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uci_toggle_state firewall core "${iface}_zone" "$new_zones"
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uci_toggle_state firewall core "${iface}_ifname" "$ifname"
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}
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fw_sysctl_interface() {
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local ifname=$1
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{
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sysctl -w net.ipv4.conf.${ifname}.accept_redirects=$FW_ACCEPT_REDIRECTS
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sysctl -w net.ipv6.conf.${ifname}.accept_redirects=$FW_ACCEPT_REDIRECTS
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sysctl -w net.ipv4.conf.${ifname}.accept_source_route=$FW_ACCEPT_SRC_ROUTE
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sysctl -w net.ipv6.conf.${ifname}.accept_source_route=$FW_ACCEPT_SRC_ROUTE
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} >/dev/null 2>/dev/null
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}
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