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[package] firewall: Initial alias interface support. This allows to define zones covering alias interfaces and associated entries like rules and forwardings.

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git-svn-id: svn://svn.openwrt.org/openwrt/trunk@21653 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
jow 2010-06-01 21:58:48 +00:00
parent 85773b84be
commit 2c25f7e70c
3 changed files with 85 additions and 28 deletions
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2
package/firewall/Makefile
View File

@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
PKG_NAME:=firewall PKG_NAME:=firewall
PKG_VERSION:=2 PKG_VERSION:=2
PKG_RELEASE:=5 PKG_RELEASE:=6
include $(INCLUDE_DIR)/package.mk include $(INCLUDE_DIR)/package.mk

110
package/firewall/files/lib/core_interface.sh
View File

@ -4,10 +4,11 @@ fw_configure_interface() {
local iface=$1 local iface=$1
local action=$2 local action=$2
local ifname=$3 local ifname=$3
local aliasnet=$4
[ "$action" == "add" ] && { [ "$action" == "add" ] && {
local status=$(uci_get_state network "$iface" up 0) local status=$(uci_get_state network "$iface" up 0)
[ "$status" == 1 ] || return 0 [ "$status" == 1 ] || [ -n "$aliasnet" ] || return 0
} }
[ -n "$ifname" ] || ifname=$(uci_get_state network "$iface" ifname "$iface") [ -n "$ifname" ] || ifname=$(uci_get_state network "$iface" ifname "$iface")
@ -20,59 +21,116 @@ fw_configure_interface() {
local zone=$2 local zone=$2
local chain=zone_${zone} local chain=zone_${zone}
local ifname=$3 local ifname=$3
local subnet=$4
local inet onet
local mode=$(fw_get_family_mode x $zone i) local mode=$(fw_get_family_mode x $zone i)
fw $action $mode f ${chain}_ACCEPT ACCEPT ^ { -o "$ifname" } case "$mode/$subnet" in
fw $action $mode f ${chain}_ACCEPT ACCEPT ^ { -i "$ifname" } # Zone supports v6 only or dual, need v6
fw $action $mode f ${chain}_DROP DROP ^ { -o "$ifname" } 6/*:*|i/*:*)
fw $action $mode f ${chain}_DROP DROP ^ { -i "$ifname" } inet="{ -s $subnet -d ::/0 }"
fw $action $mode f ${chain}_REJECT reject ^ { -o "$ifname" } onet="{ -s ::/0 -d $subnet }"
fw $action $mode f ${chain}_REJECT reject ^ { -i "$ifname" } mode=6
;;
fw $action $mode n ${chain}_nat MASQUERADE ^ { -o "$ifname" } # Zone supports v4 only or dual, need v4
fw $action $mode f ${chain}_MSSFIX TCPMSS ^ { -o "$ifname" -p tcp --tcp-flags SYN,RST SYN --clamp-mss-to-pmtu } 4/*.*.*.*|i/*.*.*.*)
inet="{ -s $subnet -d 0.0.0.0/0 }"
onet="{ -s 0.0.0.0/0 -d $subnet }"
mode=4
;;
fw $action $mode f input ${chain} $ { -i "$ifname" } # Need v6 while zone is v4
fw $action $mode f forward ${chain}_forward $ { -i "$ifname" } */*:*) fw_log info "zone $zone does not support IPv6 address family, skipping"; return ;;
fw $action $mode n PREROUTING ${chain}_prerouting ^ { -i "$ifname" }
fw $action $mode r PREROUTING ${chain}_notrack ^ { -i "$ifname" } # 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 local old_zones old_ifname old_subnet
config_get old_zones core "${iface}_zone" config_get old_zones core "${iface}_zone"
[ -n "$old_zones" ] && { [ -n "$old_zones" ] && {
config_get old_ifname core "${iface}_ifname" config_get old_ifname core "${iface}_ifname"
for z in $old_zones; do config_get old_subnet core "${iface}_subnet"
fw_log info "removing $iface ($old_ifname) from zone $z"
fw__do_rules del $z $old_ifname
ACTION=remove ZONE="$z" INTERFACE="$iface" DEVICE="$ifname" /sbin/hotplug-call firewall local z
for z in $old_zones; do
fw_log info "removing $iface ($old_ifname${old_subnet:+ alias $old_subnet}) from zone $z"
fw__do_rules del $z $old_ifname $old_subnet
[ -n "$old_subnet" ] || ACTION=remove ZONE="$z" INTERFACE="$iface" DEVICE="$ifname" /sbin/hotplug-call firewall
done done
local old_aliases
config_get old_aliases core "${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 "${iface}_zone"
uci_revert_state firewall core "${iface}_ifname" uci_revert_state firewall core "${iface}_ifname"
uci_revert_state firewall core "${iface}_subnet"
uci_revert_state firewall core "${iface}_aliases"
} }
[ "$action" == del ] && return [ "$action" == del ] && return
local new_zones local new_zones=
load_zone() { load_zone() {
fw_config_get_zone "$1" fw_config_get_zone "$1"
list_contains zone_network "$iface" || return list_contains zone_network "$iface" || return
fw_log info "adding $iface ($ifname) to zone $zone_name" fw_log info "adding $iface ($ifname${aliasnet:+ alias $aliasnet}) to zone $zone_name"
fw__do_rules add ${zone_name} "$ifname" fw__do_rules add ${zone_name} "$ifname" $aliasnet
append new_zones $zone_name append new_zones $zone_name
ACTION=add ZONE="$zone_name" INTERFACE="$iface" DEVICE="$ifname" /sbin/hotplug-call firewall [ -n "$aliasnet" ] || ACTION=add ZONE="$zone_name" INTERFACE="$iface" DEVICE="$ifname" /sbin/hotplug-call firewall
} }
config_foreach load_zone zone 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 "$ifname" "$ipaddr${netmask:+/$netmask}"
[ -n "$ip6addr" ] && fw_configure_interface "$a" add "$ifname" "$ip6addr"
done
fw_sysctl_interface $ifname
fw_callback post interface
uci_set_state firewall core "${iface}_aliases" "$aliases"
}
uci_set_state firewall core "${iface}_zone" "$new_zones" uci_set_state firewall core "${iface}_zone" "$new_zones"
uci_set_state firewall core "${iface}_ifname" "$ifname" uci_set_state firewall core "${iface}_ifname" "$ifname"
uci_set_state firewall core "${iface}_subnet" "$aliasnet"
fw_sysctl_interface $ifname
fw_callback post interface
} }
fw_sysctl_interface() { fw_sysctl_interface() {

1
package/firewall/files/lib/core_rule.sh
View File

@ -11,7 +11,6 @@ fw_config_get_rule() {
string src_port "" \ string src_port "" \
string dest "" \ string dest "" \
ipaddr dest_ip "" \ ipaddr dest_ip "" \
string dest_mac "" \
string dest_port "" \ string dest_port "" \
string icmp_type "" \ string icmp_type "" \
string proto "tcpudp" \ string proto "tcpudp" \