146 lines
4.4 KiB
Bash
146 lines
4.4 KiB
Bash
# Copyright (C) 2009-2010 OpenWrt.org
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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 "$ifname" ] || ifname=$(uci_get_state network "$iface" ifname "$iface")
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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=$4
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local inet onet
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local mode=$(fw_get_family_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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6/*:*|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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4/*.*.*.*|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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esac
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fw $action $mode f ${chain}_ACCEPT ACCEPT ^ $onet { -o "$ifname" }
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fw $action $mode f ${chain}_ACCEPT ACCEPT ^ $inet { -i "$ifname" }
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fw $action $mode f ${chain}_DROP DROP ^ $onet { -o "$ifname" }
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fw $action $mode f ${chain}_DROP DROP ^ $inet { -i "$ifname" }
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fw $action $mode f ${chain}_REJECT reject ^ $onet { -o "$ifname" }
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fw $action $mode f ${chain}_REJECT reject ^ $inet { -i "$ifname" }
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fw $action $mode n ${chain}_nat MASQUERADE ^ $onet { -o "$ifname" }
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fw $action $mode f ${chain}_MSSFIX TCPMSS ^ $onet { -o "$ifname" -p tcp --tcp-flags SYN,RST SYN --clamp-mss-to-pmtu }
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fw $action $mode f input ${chain} $ $inet { -i "$ifname" }
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fw $action $mode f forward ${chain}_forward $ $inet { -i "$ifname" }
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fw $action $mode n PREROUTING ${chain}_prerouting ^ $inet { -i "$ifname" }
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fw $action $mode r PREROUTING ${chain}_notrack ^ $inet { -i "$ifname" }
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}
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local old_zones old_ifname old_subnet
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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 "${iface}_ifname"
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config_get old_subnet core "${iface}_subnet"
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local z
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for z in $old_zones; do
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fw_log info "removing $iface ($old_ifname${old_subnet:+ alias $old_subnet}) from zone $z"
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fw__do_rules del $z $old_ifname $old_subnet
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[ -n "$old_subnet" ] || ACTION=remove ZONE="$z" INTERFACE="$iface" DEVICE="$ifname" /sbin/hotplug-call firewall
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done
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local old_aliases
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config_get old_aliases core "${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}_subnet"
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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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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" ] || ACTION=add ZONE="$zone_name" INTERFACE="$iface" DEVICE="$ifname" /sbin/hotplug-call firewall
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}
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config_foreach load_zone zone
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[ -z "$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 "$ifname" "$ipaddr${netmask:+/$netmask}"
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[ -n "$ip6addr" ] && fw_configure_interface "$a" add "$ifname" "$ip6addr"
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done
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fw_sysctl_interface $ifname
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fw_callback post interface
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uci_set_state firewall core "${iface}_aliases" "$aliases"
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}
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uci_set_state firewall core "${iface}_zone" "$new_zones"
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uci_set_state firewall core "${iface}_ifname" "$ifname"
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uci_set_state firewall core "${iface}_subnet" "$aliasnet"
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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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