firewall: - fix processing of rules with an ip family option - append interface rules at the end of internal zone chains, simplifies injecting user or addon rules - support simple file logging (option log + option log_limit per zone)
SVN-Revision: 22847
This commit is contained in:
Jo-Philipp Wich
parent
867ac59ff9
commit
ee4dd61b10
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@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
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PKG_NAME:=firewall
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PKG_VERSION:=2
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PKG_RELEASE:=9
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PKG_RELEASE:=10
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include $(INCLUDE_DIR)/package.mk
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@ -84,13 +84,16 @@ fw_load_defaults() {
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[ $defaults_syn_flood == 1 ] && \
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defaults_synflood_protect=1
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[ "${defaults_synflood_rate%/*}" == "$defaults_synflood_rate" ] && \
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defaults_synflood_rate="$defaults_synflood_rate/second"
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[ $defaults_synflood_protect == 1 ] && {
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echo "Loading synflood protection"
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fw_callback pre synflood
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fw add i f syn_flood
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fw add i f syn_flood RETURN { \
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-p tcp --syn \
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-m limit --limit "${defaults_synflood_rate}/second" --limit-burst "${defaults_synflood_burst}" \
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-m limit --limit "${defaults_synflood_rate}" --limit-burst "${defaults_synflood_burst}" \
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}
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fw add i f syn_flood DROP
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fw add i f INPUT syn_flood { -p tcp --syn }
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@ -142,6 +145,8 @@ fw_config_get_zone() {
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boolean conntrack 0 \
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boolean mtu_fix 0 \
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boolean custom_chains "$FW_ADD_CUSTOM_CHAINS" \
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boolean log 0 \
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string log_limit 10 \
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string family "" \
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} || return
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[ -n "$zone_name" ] || zone_name=$zone_NAME
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@ -204,6 +209,7 @@ fw_load_zone() {
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fw add $mode n ${chain}_prerouting
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fw add $mode r ${chain}_notrack
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[ $zone_masq == 1 ] && \
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fw add $mode n POSTROUTING ${chain}_nat $
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@ -224,6 +230,17 @@ fw_load_zone() {
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fw add $mode n ${chain}_prerouting prerouting_${zone_name} ^
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}
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[ "$zone_log" == 1 ] && {
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[ "${zone_log_limit%/*}" == "$zone_log_limit" ] && \
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zone_log_limit="$zone_log_limit/minute"
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local t
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for t in REJECT DROP MSSFIX; do
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fw add $mode f ${chain}_${t} LOG ^ \
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{ -m limit --limit $zone_log_limit --log-prefix "$t($zone_name): " }
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done
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}
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fw_callback post zone
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}
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@ -32,16 +32,16 @@ fw_configure_interface() {
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case "$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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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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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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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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@ -52,20 +52,20 @@ fw_configure_interface() {
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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 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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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 n ${chain}_nat MASQUERADE $ { -o "$ifname" $onet }
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fw $action $mode f ${chain}_MSSFIX TCPMSS $ { -o "$ifname" -p tcp --tcp-flags SYN,RST SYN --clamp-mss-to-pmtu $onet }
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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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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" $inet }
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}
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local old_zones old_ifname old_subnets
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@ -101,19 +101,6 @@ fw_configure_interface() {
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[ "$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 "$iface" aliases
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@ -142,6 +129,19 @@ fw_configure_interface() {
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uci_set_state firewall core "${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" ] || ACTION=add ZONE="$zone_name" INTERFACE="$iface" DEVICE="$ifname" /sbin/hotplug-call firewall
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}
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config_foreach load_zone zone
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uci_set_state firewall core "${iface}_zone" "$new_zones"
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uci_set_state firewall core "${iface}_ifname" "$ifname"
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}
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@ -36,7 +36,7 @@ fw__exec() { # <action> <family> <table> <chain> <target> <position> { <rules> }
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done
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fw__rc() {
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export FW_${fam}_ERROR=$1
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export FW_${fam#G}_ERROR=$1
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return $1
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}
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@ -75,14 +75,14 @@ fw__exec() { # <action> <family> <table> <chain> <target> <position> { <rules> }
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return
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fi
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local mod
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eval "mod=\$FW_${fam}_${tab}"
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eval "mod=\$FW_${fam#G}_${tab}"
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if [ "$mod" ]; then
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fw__rc $mod
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return
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fi
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case "$fam" in
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4) mod=iptable_${tab} ;;
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6) mod=ip6table_${tab} ;;
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*4) mod=iptable_${tab} ;;
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*6) mod=ip6table_${tab} ;;
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*) mod=. ;;
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esac
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grep -q "^${mod} " /proc/modules
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@ -100,8 +100,8 @@ fw__exec() { # <action> <family> <table> <chain> <target> <position> { <rules> }
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local app=
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local pol=
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case "$fam" in
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4) [ $FW_DISABLE_IPV4 == 0 ] && app=iptables || return ;;
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6) [ $FW_DISABLE_IPV6 == 0 ] && app=ip6tables || return ;;
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*4) [ $FW_DISABLE_IPV4 == 0 ] && app=iptables || return ;;
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*6) [ $FW_DISABLE_IPV6 == 0 ] && app=ip6tables || return ;;
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i) fw__dualip "$@"; return ;;
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I) fw__autoip "$@"; return ;;
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e) app=ebtables ;;
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@ -148,19 +148,23 @@ fw__exec() { # <action> <family> <table> <chain> <target> <position> { <rules> }
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return 0
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fi
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case "$fam" in
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G*) shift; while [ "$1" != "{" ]; do shift; done ;;
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esac
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if [ $# -gt 0 ]; then
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shift
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if [ $cmd == delete ]; then
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pos=
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fi
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fi
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while [ $# -gt 1 ]; do
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case "$app:$1" in
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ip6tables:--icmp-type) echo -n "--icmpv6-type" ;;
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ip6tables:icmp|ip6tables:ICMP) echo -n "icmpv6" ;;
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iptables:--icmpv6-type) echo -n "--icmp-type" ;;
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iptables:icmpv6) echo -n "icmp" ;;
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*:}|*:{) shift; continue ;;
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*) echo -n "$1" ;;
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esac
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echo -ne "\0"
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@ -202,8 +206,8 @@ fw_get_family_mode() {
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}
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case "$hint:$ipv4:$ipv6" in
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*4:1:*|*:1:0) echo 4 ;;
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*6:*:1|*:0:1) echo 6 ;;
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*4:1:*|*:1:0) echo G4 ;;
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*6:*:1|*:0:1) echo G6 ;;
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*) echo $mode ;;
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esac
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}
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