Implement support for ipsets

git-svn-id: https://shorewall.svn.sourceforge.net/svnroot/shorewall/trunk@2085 fbd18981-670d-0410-9b5c-8dc0c1a9a2bb

Shorewall2/action.template

@@ -72,6 +72,16 @@
 #						kernel and iptables must have
 #						iprange match support.
 #
+#			+remote                 The name of an ipset prefaced
+#					        by "+". Your kernel and
+#						iptables must have set match
+#						support
+#
+#			+remote[4]              The name of the ipset may
+#                                               followed by a number of
+#                                               levels of ipset bindings
+#                                               enclosed in square brackets.
+#
 #			192.168.1.1,192.168.1.2
 #						Hosts 192.168.1.1 and
 #						192.168.1.2.
@@ -85,8 +95,9 @@
 #			another colon (":") and an IP/MAC/subnet address
 #			as described above (e.g., eth1:192.168.1.5).
 #
-#	DEST		Location of Server. Same as above with the exception that
+#	DEST		Location of destination host. Same as above with the exception that
-#			MAC addresses are not allowed.
+#			MAC addresses are not allowed and that you cannot specify
+#                       an ipset name in both the SOURCE and DEST columns.
 #
 #	PROTO		Protocol - Must be "tcp", "udp", "icmp", a number, or
 #			"all".

Shorewall2/blacklist

@@ -7,9 +7,10 @@
 #
 # Columns are:
 #
-#	ADDRESS/SUBNET 	- Host address, subnetwork, MAC address or IP address
+#	ADDRESS/SUBNET 	- Host address, subnetwork, MAC address, IP address
 #			  range (if your kernel and iptables contain iprange
-#			  match support).
+#			  match support) or ipset name prefaced by "+" (if 
+#			  your kernel supports ipset match).
 #
 # 			  MAC addresses must be prefixed with "~" and use "-"
 #			  as a separator.
@@ -38,6 +39,13 @@
 # ADDRESS/SUBNET	PROTOCOL	PORT
 # 192.0.2.126		udp		53
 #
+# Example:
+#
+# To block DNS queries from addresses in the ipset 'dnsblack':
+#
+# ADDRESS/SUBNET	PROTOCOL	PORT
+# +dnsblack		udp		53
+#
 # Please see http://shorewall.net/blacklisting_support.htm for additional 
 # information.
 #

Shorewall2/changelog.txt

@@ -1,3 +1,5 @@
 Changes in 2.3.0
 
 1) Implement support for --cmd-owner
+
+2) Implement support for ipsets.

Shorewall2/firewall

@@ -218,6 +218,19 @@ run_tc() {
     fi
 }
 
+#
+# Run ipset and if an error occurs, stop the firewall and quit
+#
+run_ipset() {
+    if ! ipset $@ ; then
+	if [ -z "$stopping" ]; then
+	    error_message "ERROR: Command \"ipset $@\" Failed"
+	    stop_firewall
+	    exit 2
+	fi
+    fi
+}
+
 #
 # Create a filter chain
 #
@@ -541,6 +554,29 @@ iprange_echo()
     fi
 }
 
+#
+# Get set flags
+#
+get_set_flags() # $1 = set name and optional [levels], $2 = src or dst
+{
+    local temp setname options=$2
+
+    case $1 in
+	*\[*[1-6]\])
+            temp=${1#*\[}
+	    temp=${temp%\]}
+	    setname=${1%\[*}
+	    while [ $temp -gt 1 ]; do
+	       options="$options,$2"
+	       temp=$(($temp - 1))
+	    done	
+	    echo "--set ${setname#+} $options"
+	    ;;
+	*)
+	    echo "--set ${1#+} $2"
+	    ;;
+    esac
+}	               
 
 #
 # Source IP range
@@ -558,6 +594,12 @@ source_ip_range() # $1 = Address or Address Range
 		    ;;
 	    esac
 	    ;;
+	!+*)
+	    echo "-m set ! $(get_set_flags ${1#!} src)"
+	    ;;
+	+*)
+	    echo "-m set $(get_set_flags $1 src)"
+	    ;;
 	*)
 	    echo "-s $1"
 	    ;;
@@ -580,6 +622,12 @@ dest_ip_range() # $1 = Address or Address Range
 		    ;;
 	    esac
 	    ;;
+	!+*)
+	    echo "-m set ! $(get_set_flags ${1#!} dst)"
+	    ;;
+	+*)
+	    ipset_echo "-m set $(get_set_flags ${1#+} dst)"
+	    ;;
 	*)
 	    echo "-d $1"
 	    ;;
@@ -595,6 +643,10 @@ both_ip_ranges() # $1 = Source address or range, $2 = dest address or range
 	    prefix="-m iprange"
 	    match="--src-range $1"
 	    ;;
+	+*)
+	    prefix="-m set"
+	    match="--set ${1#+} src"
+	    ;;
 	*)
 	    match="-s $1"
 	    ;;
@@ -605,6 +657,18 @@ both_ip_ranges() # $1 = Source address or range, $2 = dest address or range
 	    prefix="-m iprange"
 	    match="$match --dst-range $2"
 	    ;;
+	+*)
+	    case $1 in
+		*.*.*.*-*.*.*.*)
+		    prefix="$iprange -m set"
+		    ;;
+		*)
+		    prefix="-m set"
+		    ;;
+	    esac
+
+	    match="--set ${1#+} dst"
+	    ;;
 	*)
 	    match="$match -d $2"
 	    ;;
@@ -749,6 +813,22 @@ match_ipsec_out() # $1 = zone, $2 = host
     fi
 }
 
+#
+# Generate a match for packets whose source matches the passed IPSET
+#
+match_ipset_source() 
+{
+    echo "-m set --set ${1#+} src"
+}
+
+#
+# Generate a match for packets whose destination matches the passed IPSET
+#
+match_ipset_dest() 
+{
+    echo "-m set --set ${1#+} dst"
+}
+
 #
 # Jacket for ip_range() that takes care of iprange match
 #
@@ -1002,7 +1082,7 @@ validate_hosts_file() {
 			   startup_error "Bridged interfaces may not be defined in /etc/shorewall/interfaces: $host"
 		       check_bridge_port ${host%%:*}
 		       ;;
-		   *.*.*.*)
+		   *.*.*.*|+*)
 		       ;;
 		   *)
 		       known_interface $host && \
@@ -2380,7 +2460,7 @@ process_tc_rule()
 
 	if [ "x$source" != "x-"	 ]; then
 	    case $source in
-		*.*.*)
+		*.*.*|+*|!+*)
 		    r="$(source_ip_range $source) "
 		    ;;
 		~*)
@@ -2431,7 +2511,7 @@ process_tc_rule()
 
 	if [ "x$dest" != "x-"  ]; then
 	    case $dest in
-		*.*.*)
+		*.*.*|+*|!+*)
 		    r="${r}$(dest_ip_range $dest) "
 		    ;;
 		*)
@@ -2685,8 +2765,8 @@ process_accounting_rule() {
 	    accounting_interface_verify ${source%:*}
 	    rule="-s ${source#*:} $(match_source_dev ${source%:*})"
 	    ;;
-	*.*.*.*)
+	*.*.*.*|+*|!+*)
-	    rule="-s $source"
+	    rule="$(source_ip_range)"
 	    ;;
 	-|all|any)
 	    ;;
@@ -2703,7 +2783,7 @@ process_accounting_rule() {
 	    accounting_interface_verify ${dest%:*}
 	    rule="$rule $(dest_ip_range ${dest#*:}) $(match_dest_dev ${dest%:*})"
 	    ;;
-	*.*.*.*)
+	*.*.*.*|+*|!*)
 	    rule="$rule $(dest_ip_range $dest)"
 	    ;;
 	-|all|any)
@@ -3036,8 +3116,8 @@ add_an_action()
 	action_interface_verify ${client%:*}
 	cli="$(match_source_dev ${client%:*}) $(source_ip_range ${client#*:})"
 	;;
-    *.*.*)
+    *.*.*|+*|!+*)
-	cli="-s $client"
+	cli="$(source_ip_range $client)"
 	;;
     ~*)
 	cli=$(mac_match $client)
@@ -3058,7 +3138,7 @@ add_an_action()
     case "$server" in
     -)
 	;;
-    *.*.*)
+    *.*.*|+*|!+*)
 	serv=$server
 	;;
     ~*)
@@ -3116,7 +3196,7 @@ add_an_action()
 		for srv in $(firewall_ip_range $serv1); do
 		    if [ -n "$loglevel" ]; then
 			log_rule_limit $loglevel $chain $action $logtarget "$ratelimit" "$logtag" -A $userandgroup \
-			    $(fix_bang $proto $sports $multiport $cli $(source_ip_range $srv) $dports)
+			    $(fix_bang $proto $sports $multiport $cli $(dest_ip_range $srv) $dports)
 		    fi
 		    
 		    run_iptables2 -A $chain $proto $multiport $cli $sports \
@@ -4082,7 +4162,7 @@ add_a_rule()
 	rule_interface_verify ${client%:*}
 	cli="$(match_source_dev ${client%:*}) $(source_ip_range ${client#*:})"
 	;;
-    *.*.*)
+    *.*.*|+*)
 	cli="$(source_ip_range $client)"
 	;;
     ~*)
@@ -4104,7 +4184,7 @@ add_a_rule()
     case "$server" in
     -)
 	;;
-    *.*.*)
+    *.*.*|+*)
 	serv=$server
 	;;
     ~*)
@@ -4763,7 +4843,7 @@ process_tos_rule() {
     fi
 
     [ -n "$src" ] && case "$src" in
-	*.*.*)
+	*.*.*|+*|!+*)
 	    #
 	    # IP Address or networks
 	    #
@@ -4811,7 +4891,7 @@ process_tos_rule() {
     fi
 
     [ -n "$dst" ] && case "$dst" in
-	*.*.*)
+	*.*.*|+*|!+*)
 	    #
 	    # IP Address or networks
 	    #
@@ -5245,7 +5325,7 @@ setup_masq()
 	source="$networks"
 
 	case $source in
-	*.*.*)
+	*.*.*|+*|!+*)
 	    ;;
 	*)
 	    networks=$(get_routed_networks $networks)
@@ -5256,8 +5336,6 @@ setup_masq()
 
 	[ "x$addresses" = x- ] && addresses=	
 
-	
-
 	if [ -n "$addresses" -a -n "$add_snat_aliases" ]; then
 	    for address in $(separate_list $addresses); do
 		address=${address%:)}
@@ -5502,6 +5580,8 @@ process_blacklist_rec() {
     local addr
     local proto
     local dport
+    local temp
+    local setname
 
     for addr in $(separate_list $networks); do
 	case $addr in
@@ -5825,6 +5905,16 @@ report_capabilities() {
     report_capability "Owner Match" $OWNER_MATCH
 }
 
+#
+# Restore ipsets
+#
+restore_ipsets() 
+{
+    local restore_sets=/var/lib/shorewall/${RESTOREFILE:-restore}-ipsets
+    
+    [ -x $restore_sets ] && $restore_sets 
+}
+
 #
 # Perform Initialization
 #	- Delete all old rules
@@ -5918,6 +6008,7 @@ initialize_netfilter () {
 
     deleteallchains
 
+
     setcontinue FORWARD
     setcontinue INPUT
     setcontinue OUTPUT
@@ -7469,6 +7560,7 @@ do_initialize() {
     DROPINVALID=
     RFC1918_STRICT=
     MACLIST_TTL=
+    RESTOREFILE=
 
     RESTOREBASE=
     TMP_DIR=

Shorewall2/help

@@ -55,7 +55,10 @@ address|host)
     May be either a host IP address such as 192.168.1.4 or a network address in
     CIDR format like 192.168.1.0/24. If your kernel and iptables contain iprange
     match support then IP address ranges of the form <low address>-<high address>
-    are also permitted."
+    are also permitted. If your kernel and iptables contain ipset match support 
+    then you may specify the name of an ipset prefaced by "+". The name of the
+    ipsec may be optionally followed by a number of levels of ipset bindings
+    (1 - 6) that are to be followed"
 	;;
 
 allow)

Shorewall2/releasenotes.txt

@@ -36,4 +36,30 @@ New Features in version 2.3.0
    symbolic links, it's easy to alias command names to be anything you
    want.
 
+2) Support has been added for ipsets
+   (see http://people.netfilter.org/kadlec/ipset/).
+
+   In most places where an host or network address may be used, you may
+   also use the name of an ipset prefaced by "+". The name of the set
+   may optionally followed by a number from 1 to 6 enclosed in square
+   brackets ([]) -- this number indicates the maximum number of ipset
+   binding levels that are to be matched. Depending on the context
+   where the ipset name is used, either all "src" or all "dst" matches
+   will be used.
+ 
+   Example 1: Blacklist all hosts in an ipset named "blacklist"
+
+	   /etc/shorewall/blacklist
+
+	   #ADDRESS/SUBNET         PROTOCOL        PORT
+	   +blacklist
+
+   Example 2: Allow SSH from all hosts in an ipset named "sshok:
+
+	   /etc/shorewall/rules
+
+	   #ACTION      SOURCE      DEST     PROTO    DEST PORT(S)
+           ACCEPT	+sshok      fw	     tcp      22
+
+
 

Shorewall2/rules

@@ -134,6 +134,11 @@
 #			Hosts may be specified as an IP address range using the
 #			syntax <low address>-<high address>. This requires that
 #			your kernel and iptables contain iprange match support.
+#                       If you kernel and iptables have ipset match support then
+#                       you may give the name of an ipset prefaced by "+". The
+#                       ipset name may be optionally followed by a number from
+#                       1 to 6 enclosed in square brackets ([]) to indicate the
+#                       number of levels of source bindings to be matched.
 #
 #			dmz:192.168.2.2		Host 192.168.2.2 in the DMZ
 #
@@ -189,6 +194,14 @@
 #			the connections will be assigned to addresses in the
 #			range in a round-robin fashion.
 #
+#                       If you kernel and iptables have ipset match support then
+#                       you may give the name of an ipset prefaced by "+". The
+#                       ipset name may be optionally followed by a number from
+#                       1 to 6 enclosed in square brackets ([]) to indicate the
+#                       number of levels of destination bindings to be matched.
+#                       Only one of the SOURCE and DEST columns may specify an
+#                       ipset name.
+#
 #			The port that the server is listening on may be
 #			included and separated from the server's IP address by
 #			":". If omitted, the firewall will not modifiy the