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[package] 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)


git-svn-id: svn://svn.openwrt.org/openwrt/trunk@22847 3c298f89-4303-0410-b956-a3cf2f4a3e73
master
Jo-Philipp Wich 2010-08-31 01:54:08 +00:00
parent 229d390a6c
commit 2ef5ba1813
4 changed files with 63 additions and 42 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
package/firewall/Makefile
View File

@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
PKG_NAME:=firewall
PKG_VERSION:=2
PKG_RELEASE:=9
PKG_RELEASE:=10
include $(INCLUDE_DIR)/package.mk

19
package/firewall/files/lib/core_init.sh
View File

@ -84,13 +84,16 @@ fw_load_defaults() {
[ $defaults_syn_flood == 1 ] && \
defaults_synflood_protect=1
[ "${defaults_synflood_rate%/*}" == "$defaults_synflood_rate" ] && \
defaults_synflood_rate="$defaults_synflood_rate/second"
[ $defaults_synflood_protect == 1 ] && {
echo "Loading synflood protection"
fw_callback pre synflood
fw add i f syn_flood
fw add i f syn_flood RETURN { \
-p tcp --syn \
-m limit --limit "${defaults_synflood_rate}/second" --limit-burst "${defaults_synflood_burst}" \
-m limit --limit "${defaults_synflood_rate}" --limit-burst "${defaults_synflood_burst}" \
}
fw add i f syn_flood DROP
fw add i f INPUT syn_flood { -p tcp --syn }
@ -142,6 +145,8 @@ fw_config_get_zone() {
boolean conntrack 0 \
boolean mtu_fix 0 \
boolean custom_chains "$FW_ADD_CUSTOM_CHAINS" \
boolean log 0 \
string log_limit 10 \
string family "" \
} || return
[ -n "$zone_name" ] || zone_name=$zone_NAME
@ -204,6 +209,7 @@ fw_load_zone() {
fw add $mode n ${chain}_prerouting
fw add $mode r ${chain}_notrack
[ $zone_masq == 1 ] && \
fw add $mode n POSTROUTING ${chain}_nat $
@ -224,6 +230,17 @@ fw_load_zone() {
fw add $mode n ${chain}_prerouting prerouting_${zone_name} ^
}
[ "$zone_log" == 1 ] && {
[ "${zone_log_limit%/*}" == "$zone_log_limit" ] && \
zone_log_limit="$zone_log_limit/minute"
local t
for t in REJECT DROP MSSFIX; do
fw add $mode f ${chain}_${t} LOG ^ \
{ -m limit --limit $zone_log_limit --log-prefix "$t($zone_name): " }
done
}
fw_callback post zone
}

62
package/firewall/files/lib/core_interface.sh
View File

@ -32,16 +32,16 @@ fw_configure_interface() {
case "$mode/$subnet" in
# Zone supports v6 only or dual, need v6
6/*:*|i/*:*)
inet="{ -s $subnet -d ::/0 }"
onet="{ -s ::/0 -d $subnet }"
G6/*:*|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 }"
G4/*.*.*.*|i/*.*.*.*)
inet="-s $subnet -d 0.0.0.0/0"
onet="-s 0.0.0.0/0 -d $subnet"
mode=4
;;
@ -52,20 +52,20 @@ fw_configure_interface() {
*/*.*) 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 f ${chain}_ACCEPT ACCEPT $ { -o "$ifname" $onet }
fw $action $mode f ${chain}_ACCEPT ACCEPT $ { -i "$ifname" $inet }
fw $action $mode f ${chain}_DROP DROP $ { -o "$ifname" $onet }
fw $action $mode f ${chain}_DROP DROP $ { -i "$ifname" $inet }
fw $action $mode f ${chain}_REJECT reject $ { -o "$ifname" $onet }
fw $action $mode f ${chain}_REJECT reject $ { -i "$ifname" $inet }
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 n ${chain}_nat MASQUERADE $ { -o "$ifname" $onet }
fw $action $mode f ${chain}_MSSFIX TCPMSS $ { -o "$ifname" -p tcp --tcp-flags SYN,RST SYN --clamp-mss-to-pmtu $onet }
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" }
fw $action $mode f input ${chain} $ { -i "$ifname" $inet }
fw $action $mode f forward ${chain}_forward $ { -i "$ifname" $inet }
fw $action $mode n PREROUTING ${chain}_prerouting $ { -i "$ifname" $inet }
fw $action $mode r PREROUTING ${chain}_notrack $ { -i "$ifname" $inet }
}
local old_zones old_ifname old_subnets
@ -101,19 +101,6 @@ fw_configure_interface() {
[ "$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 "$iface" aliases
@ -142,6 +129,19 @@ fw_configure_interface() {
uci_set_state firewall core "${iface}_subnets" "$subnets"
}
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="$ifname" /sbin/hotplug-call firewall
}
config_foreach load_zone zone
uci_set_state firewall core "${iface}_zone" "$new_zones"
uci_set_state firewall core "${iface}_ifname" "$ifname"
}

22
package/firewall/files/lib/fw.sh
View File

@ -36,7 +36,7 @@ fw__exec() { # <action> <family> <table> <chain> <target> <position> { <rules> }
done
fw__rc() {
export FW_${fam}_ERROR=$1
export FW_${fam#G}_ERROR=$1
return $1
}
@ -75,14 +75,14 @@ fw__exec() { # <action> <family> <table> <chain> <target> <position> { <rules> }
return
fi
local mod
eval "mod=\$FW_${fam}_${tab}"
eval "mod=\$FW_${fam#G}_${tab}"
if [ "$mod" ]; then
fw__rc $mod
return
fi
case "$fam" in
4) mod=iptable_${tab} ;;
6) mod=ip6table_${tab} ;;
*4) mod=iptable_${tab} ;;
*6) mod=ip6table_${tab} ;;
*) mod=. ;;
esac
grep -q "^${mod} " /proc/modules
@ -100,8 +100,8 @@ fw__exec() { # <action> <family> <table> <chain> <target> <position> { <rules> }
local app=
local pol=
case "$fam" in
4) [ $FW_DISABLE_IPV4 == 0 ] && app=iptables || return ;;
6) [ $FW_DISABLE_IPV6 == 0 ] && app=ip6tables || return ;;
*4) [ $FW_DISABLE_IPV4 == 0 ] && app=iptables || return ;;
*6) [ $FW_DISABLE_IPV6 == 0 ] && app=ip6tables || return ;;
i) fw__dualip "$@"; return ;;
I) fw__autoip "$@"; return ;;
e) app=ebtables ;;
@ -148,19 +148,23 @@ fw__exec() { # <action> <family> <table> <chain> <target> <position> { <rules> }
return 0
fi
case "$fam" in
G*) shift; while [ "$1" != "{" ]; do shift; done ;;
esac
if [ $# -gt 0 ]; then
shift
if [ $cmd == delete ]; then
pos=
fi
fi
while [ $# -gt 1 ]; do
case "$app:$1" in
ip6tables:--icmp-type) echo -n "--icmpv6-type" ;;
ip6tables:icmp|ip6tables:ICMP) echo -n "icmpv6" ;;
iptables:--icmpv6-type) echo -n "--icmp-type" ;;
iptables:icmpv6) echo -n "icmp" ;;
*:}|*:{) shift; continue ;;
*) echo -n "$1" ;;
esac
echo -ne "\0"
@ -202,8 +206,8 @@ fw_get_family_mode() {
}
case "$hint:$ipv4:$ipv6" in
*4:1:*|*:1:0) echo 4 ;;
*6:*:1|*:0:1) echo 6 ;;
*4:1:*|*:1:0) echo G4 ;;
*6:*:1|*:0:1) echo G6 ;;
*) echo $mode ;;
esac
}