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diff --git a/heartbeat/portblock b/heartbeat/portblock
index f30d52f68..7c21d0c3b 100644
--- a/heartbeat/portblock
+++ b/heartbeat/portblock
@@ -1,351 +1,366 @@
#!/bin/sh
#
# portblock: iptables temporary portblocking control
#
-# Author: Sun Jiang Dong
+# Author: Sun Jiang Dong (initial version)
+# Philipp Reisner (per-IP filtering)
#
# License: GNU General Public License (GPL)
#
# Copyright: (C) 2005 International Business Machines
#
# OCF parameters are as below:
# OCF_RESKEY_protocol
# OCF_RESKEY_portno
# OCF_RESKEY_action
+# OCF_RESKEY_ip
#######################################################################
# Initialization:
. ${OCF_ROOT}/resource.d/heartbeat/.ocf-shellfuncs
+# Defaults
+OCF_RESKEY_ip_default="0.0.0.0/0"
+
+: ${OCF_RESKEY_ip=${OCF_RESKEY_ip_default}}
#######################################################################
CMD=`basename $0`
usage()
{
cat <<END >&2
usage: $CMD {start|stop|status|monitor|meta-data|validate-all}
$CMD is used to temporarily block ports using iptables.
It can be used to turn off a port before bringing
up an IP address, and enable it after a service is started.
To do that for samba, the following resource line can be used:
$CMD::tcp::137,138::block \\
10.10.10.20 \\
nmbd smbd \\
$CMD::tcp::137,138::unblock
This will do the follwing things:
- DROP all incoming packets for TCP ports 137 and 138
- Bring up the IP alias 10.10.10.20
- start the nmbd and smbd services
- Re-enable TCP ports 137 and 138
(enable normal firewall rules on those ports)
This prevents clients from getting ICMP port unreachable
if they try to reconnect to the service after the alias is
enabled but before nmbd and smbd are running. These packets
will cause some clients to give up attempting to reconnect to
the server.
NOTE: iptables is linux-specific...
END
}
meta_data() {
cat <<END
<?xml version="1.0"?>
<!DOCTYPE resource-agent SYSTEM "ra-api-1.dtd">
<resource-agent name="portblock">
<version>1.0</version>
<longdesc lang="en">
Resource script for portblock. It is used to temporarily block ports
using iptables.
</longdesc>
<shortdesc lang="en">portblock resource agent</shortdesc>
<parameters>
<parameter name="protocol" unique="0" required="1">
<longdesc lang="en">
The protocol used to be blocked/unblocked.
</longdesc>
<shortdesc lang="en">protocol</shortdesc>
<content type="string" default="" />
</parameter>
<parameter name="portno" unique="0" required="1">
<longdesc lang="en">
The port number used to be blocked/unblocked.
</longdesc>
<shortdesc lang="en">portno</shortdesc>
<content type="integer" default="" />
</parameter>
+<parameter name="ip" unique="0" required="0">
+<longdesc lang="en">
+The IP address used to be blocked/unblocked.
+</longdesc>
+<shortdesc lang="en">ip</shortdesc>
+<content type="string" default="${OCF_RESKEY_ip_default}" />
+</parameter>
+
<parameter name="action" unique="0" required="1">
<longdesc lang="en">
The action (block/unblock) to be done on the protocol::portno.
</longdesc>
<shortdesc lang="en">action</shortdesc>
<content type="string" default="" />
</parameter>
</parameters>
<actions>
<action name="start" timeout="20" />
<action name="stop" timeout="20" />
<action name="status" depth="0" timeout="10" interval="10" start-delay="0" />
<action name="monitor" depth="0" timeout="10" interval="10" start-delay="0" />
<action name="meta-data" timeout="5" />
<action name="validate-all" timeout="5" />
</actions>
</resource-agent>
END
}
#
# Because this is the normal usage, we consider "block"
# resources to be pseudo-resources -- that is, their status can't
# be reliably determined through external means.
# This is because we expect an "unblock" resource to come along
# and disable us -- but we're still in some sense active...
#
#iptables_spec {udp|tcp} portno,portno
iptables_spec()
{
echo -D INPUT -p $1 -m multiport --dports $2 -j DROP
}
#active_grep_pat {udp|tcp} portno,portno
active_grep_pat()
{
w="[ ][ ]*"
any="0\\.0\\.0\\.0/0"
- echo "^DROP${w}${1}${w}--${w}${any}${w}${any}${w}multiport${w}dports${w}${2} "
+ echo "^DROP${w}${1}${w}--${w}${any}${w}${3}${w}multiport${w}dports${w}${2} "
}
-#chain_isactive {udp|tcp} portno,portno
+#chain_isactive {udp|tcp} portno,portno ip
chain_isactive()
{
- PAT=`active_grep_pat "$1" "$2"`
+ PAT=`active_grep_pat "$1" "$2" "$3"`
$IPTABLES -n -L INPUT | grep "$PAT" >/dev/null
}
SayActive()
{
echo "$CMD DROP rule for INPUT chain [$*] is running (OK)"
}
SayConsideredActive()
{
echo "$CMD DROP rule for INPUT chain [$*] considered to be running (OK)"
}
SayInactive()
{
echo "$CMD DROP rule for INPUT chain [$*] is inactive"
}
-#IptablesStatus {udp|tcp} portno,portno {block|unblock}
+#IptablesStatus {udp|tcp} portno,portno ip {block|unblock}
IptablesStatus() {
local rc
rc=$OCF_ERR_GENERIC
activewords="$CMD $1 $2 is running (OK)"
- if chain_isactive "$1" "$2"; then
- case $3 in
+ if chain_isactive "$1" "$2" "$3"; then
+ case $4 in
block)
SayActive $*
rc=$OCF_SUCCESS
;;
*)
SayInactive $*
rc=$OCF_NOT_RUNNING
;;
esac
else
- case $3 in
+ case $4 in
block)
if ha_pseudo_resource "${OCF_RESOURCE_INSTANCE}" status; then
SayConsideredActive $*
rc=$OCF_SUCCESS
else
SayInactive $*
rc=$OCF_NOT_RUNNING
fi
;;
*)
SayActive $*
rc=$OCF_SUCCESS
;;
esac
fi
return $rc
}
-#IptablesBLOCK {udp|tcp} portno,portno
+#IptablesBLOCK {udp|tcp} portno,portno ip
IptablesBLOCK()
{
if
- chain_isactive "$1" "$2"
+ chain_isactive "$1" "$2" "$3"
then
: OK -- chain already active
else
- $IPTABLES -I INPUT -p "$1" -m multiport --dports "$2" -j DROP
+ $IPTABLES -I INPUT -p "$1" -d "$3" -m multiport --dports "$2" -j DROP
fi
return $?
}
-#IptablesUNBLOCK {udp|tcp} portno,portno
+#IptablesUNBLOCK {udp|tcp} portno,portno ip
IptablesUNBLOCK()
{
if
- chain_isactive "$1" "$2"
+ chain_isactive "$1" "$2" "$3"
then
- $IPTABLES -D INPUT -p "$1" -m multiport --dports "$2" -j DROP
+ $IPTABLES -D INPUT -p "$1" -d "$3" -m multiport --dports "$2" -j DROP
else
: Chain Not active
fi
return $?
}
-#IptablesStart {udp|tcp} portno,portno {block|unblock}
+#IptablesStart {udp|tcp} portno,portno ip {block|unblock}
IptablesStart()
{
ha_pseudo_resource "${OCF_RESOURCE_INSTANCE}" start
- case $3 in
+ case $4 in
block) IptablesBLOCK "$@";;
unblock) IptablesUNBLOCK "$@";;
*) usage; return 1;
esac
return $?
}
-#IptablesStop {udp|tcp} portno,portno {block|unblock}
+#IptablesStop {udp|tcp} portno,portno ip {block|unblock}
IptablesStop()
{
ha_pseudo_resource "${OCF_RESOURCE_INSTANCE}" stop
- case $3 in
+ case $4 in
block) IptablesUNBLOCK "$@";;
unblock) IptablesBLOCK "$@";;
*) usage; return 1;;
esac
return $?
}
#
# Check if the port is valid, this function code is not decent, but works
#
CheckPort() {
# Examples of valid port: "1080", "1", "0080"
# Examples of invalid port: "1080bad", "0", "0000", ""
case "$1" in
*[!0-9]*) #got invalid char
false;;
*[1-9]*) #no invalid char, and has non-zero digit, so is a good port
true;;
*) #empty string, or string of 0's
false;;
esac
}
IptablesValidateAll()
{
check_binary $IPTABLES
case $protocol in
tcp|udp)
;;
*)
ocf_log err "Invalid protocol $protocol!"
exit $OCF_ERR_ARGS
;;
esac
if CheckPort "$portno"; then
:
else
ocf_log err "Invalid port number $portno!"
exit $OCF_ERR_ARGS
fi
case $action in
block|unblock)
;;
*)
ocf_log err "Invalid action $action!"
exit $OCF_ERR_ARGS
;;
esac
return $OCF_SUCCESS
}
if
( [ $# -ne 1 ] )
then
usage
exit $OCF_ERR_ARGS
fi
case $1 in
meta-data) meta_data
exit $OCF_SUCCESS
;;
usage) usage
exit $OCF_SUCCESS
;;
*) ;;
esac
if [ -z "$OCF_RESKEY_protocol" ]; then
ocf_log err "Please set OCF_RESKEY_protocol"
exit $OCF_ERR_ARGS
fi
if [ -z "$OCF_RESKEY_portno" ]; then
ocf_log err "Please set OCF_RESKEY_portno"
exit $OCF_ERR_ARGS
fi
if [ -z "$OCF_RESKEY_action" ]; then
ocf_log err "Please set OCF_RESKEY_action"
exit $OCF_ERR_ARGS
fi
protocol=$OCF_RESKEY_protocol
portno=$OCF_RESKEY_portno
action=$OCF_RESKEY_action
+ip=$OCF_RESKEY_ip
case $1 in
start)
- IptablesStart $protocol $portno $action
+ IptablesStart $protocol $portno $ip $action
;;
stop)
- IptablesStop $protocol $portno $action
+ IptablesStop $protocol $portno $ip $action
;;
status|monitor)
- IptablesStatus $protocol $portno $action
+ IptablesStatus $protocol $portno $ip $action
;;
validate-all)
IptablesValidateAll
;;
*) usage
exit $OCF_ERR_UNIMPLEMENTED
;;
esac
exit $?

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