static executor: Add support for IPv4 'pointopoint' addresses.

Closes #96

Signed-off-by: Maximilian Wilhelm <max@sdn.clinic>

doc/interfaces.scd

@@ -70,6 +70,11 @@ the system will only respond to certain keywords by default:
 	is for backwards compatibility and should not be used in new
 	deployments.
 
+*pointopoint*
+	Sets the given IPv4 address as the peer address on the interface.
+	This setting only takes effect for the IPv4 address familiy and
+	only makes sense in combination with as /32 netmask.
+
 *link-type* _link-type_
 	Denotes the link-type of the interface. When set to _dummy_,
 	the interface is created as a virtual dummy interfaces.

executor-scripts/linux/static

@@ -2,6 +2,8 @@
 
 set -e
 
+[ -z "$VERBOSE" ] || set -x
+
 [ -z "$IF_METRIC" ] && IF_METRIC="1"
 [ -n "$IF_VRF_TABLE" ] && VRF_TABLE="table $IF_VRF_TABLE"
 [ -n "$IF_VRF_MEMBER" ] && VRF_TABLE="vrf $IF_VRF_MEMBER"
@@ -20,7 +22,13 @@ addr_family() {
 configure_addresses() {
 	for i in $(ifquery -p address -i $INTERFACES_FILE $IFACE); do
 		addrfam=$(addr_family $i)
-		${MOCK} ip $addrfam addr $1 $i dev $IFACE
+		if [ "${IF_POINTOPOINT}" -a "${addrfam}" = "-4" ]; then
+			PEER="peer ${IF_POINTOPOINT}"
+		else
+			PEER=""
+		fi
+
+		${MOCK} ip $addrfam addr $1 $i $PEER dev $IFACE
 	done
 }
 
@@ -31,8 +39,6 @@ configure_gateways() {
 	done
 }
 
-[ -z "$VERBOSE" ] || set -x
-
 case "$PHASE" in
 up)
 	configure_addresses add

tests/fixtures/static-eth0-ptp.interfaces

@@ -0,0 +1,7 @@
+auto eth0
+iface eth0
+	address 203.0.113.2/32
+	pointopoint 192.0.2.1
+	gateway 192.0.2.1
+	address 2001:db8:1000:2::2/64
+        gateway 2001:db8:1000:2::1

tests/linux/static_test

@@ -4,7 +4,14 @@
 EXECUTOR="$(atf_get_srcdir)/../../executor-scripts/linux/static"
 FIXTURES="$(atf_get_srcdir)/../fixtures"
 
-tests_init up down vrf_up vrf_down metric_up metric_down
+tests_init \
+	up \
+	up_ptp \
+	down \
+	vrf_up \
+	vrf_down \
+	metric_up \
+	metric_down
 
 up_body() {
 	export IFACE=eth0 PHASE=up MOCK=echo INTERFACES_FILE="$FIXTURES/static-eth0.interfaces"
@@ -16,6 +23,17 @@ up_body() {
 		${EXECUTOR}
 }
 
+up_ptp_body() {
+	export IFACE=eth0 PHASE=up MOCK=echo INTERFACES_FILE="$FIXTURES/static-eth0-ptp.interfaces" \
+		IF_POINTOPOINT="192.0.2.1"
+	atf_check -s exit:0 \
+		-o match:'addr add 203.0.113.2/32 peer 192.0.2.1 dev eth0' \
+		-o match:'route add default via 192.0.2.1 metric 1 dev eth0' \
+		-o match:'addr add 2001:db8:1000:2::2/64 dev eth0' \
+		-o match:'route add default via 2001:db8:1000:2::1 metric 1 dev eth0' \
+		${EXECUTOR}
+}
+
 down_body() {
 	export IFACE=eth0 PHASE=down MOCK=echo INTERFACES_FILE="$FIXTURES/static-eth0.interfaces"
 	atf_check -s exit:0 \