OVN: add unit test for ICMPv6 TTL exceeded

Add unit test for the ICMPv6 TTL exceeded packet sent by OVN
logical router when it receives an IPv6 packet whose TTL has
expired (ip.ttl == {0, 1})

Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi@redhat.com>
Signed-off-by: Ben Pfaff <blp@ovn.org>

1 files changed, 23 insertions, 3 deletions

diff --git a/tests/ovn.at b/tests/ovn.at
index 6ebf101c8..f90d0c82f 100644
--- a/tests/ovn.at
+++ b/tests/ovn.at
@@ -10330,6 +10330,25 @@ test_ip_packet() {
     as hv$hv ovs-appctl netdev-dummy/receive vif$inport $packet
 }
 
+# test_ip6_packet INPORT HV ETH_SRC ETH_DST IPV6_SRC IPV6_DST IPV6_ROUTER EXP_ICMP_CHKSUM
+#
+# Causes a packet to be received on INPORT of the hypervisor HV. The packet is an IPv6
+# packet with ETH_SRC, ETH_DST, IPV6_SRC and IPV6_DST as specified.
+# IPV6_ROUTER and EXP_ICMP_CHKSUM are the source IP and checksum of the icmpv6 ttl exceeded
+# packet sent by OVN logical router
+test_ip6_packet() {
+    local inport=$1 hv=$2 eth_src=$3 eth_dst=$4 ipv6_src=$5 ipv6_dst=$6 ipv6_router=$7 exp_icmp_chksum=$8
+    shift 8
+
+    local ip6_hdr=6000000000151101${ipv6_src}${ipv6_dst}
+    local packet=${eth_dst}${eth_src}86dd${ip6_hdr}dbb8303900155bac6b646f65206676676e6d66720a
+
+    local reply=${eth_src}${eth_dst}86dd6000000000303afe${ipv6_router}${ipv6_src}0300${exp_icmp_chksum}00000000${ip6_hdr}
+    echo $reply >> vif$inport.expected
+
+    as hv$hv ovs-appctl netdev-dummy/receive vif$inport $packet
+}
+
 ip_to_hex() {
     printf "%02x%02x%02x%02x" "$@"
 }
@@ -10344,7 +10363,7 @@ for i in 1 2; do
     ovn_attach n$i br-phys 192.168.$i.1
 
     ovn-nbctl lsp-add sw$i sw$i-p${i}0 -- \
-        lsp-set-addresses sw$i-p${i}0 "00:00:00:00:00:0$i 192.168.$i.1"
+        lsp-set-addresses sw$i-p${i}0 "00:00:00:00:00:0$i 192.168.$i.1 2001:db8:$i::11"
 
     ovs-vsctl -- add-port br-int vif$i -- \
         set interface vif$i \
@@ -10356,10 +10375,10 @@ done
 
 ovn-nbctl lr-add lr0
 for i in 1 2; do
-    ovn-nbctl lrp-add lr0 lrp$i 00:00:00:00:ff:0$i 192.168.$i.254/24
+    ovn-nbctl lrp-add lr0 lrp$i 00:00:00:00:ff:0$i 192.168.$i.254/24 2001:db8:$i::1/64
     ovn-nbctl -- lsp-add sw$i lrp$i-attachment \
               -- set Logical_Switch_Port lrp$i-attachment type=router \
-                options:router-port=lrp$i addresses='"00:00:00:00:ff:'0$i'"'
+                options:router-port=lrp$i addresses='"00:00:00:00:ff:0'$i' 192.168.'$i'.254 2001:db8:'$i'::1"'
 done
 
 OVN_POPULATE_ARP
@@ -10367,6 +10386,7 @@ OVN_POPULATE_ARP
 ovn-nbctl --wait=hv sync
 
 test_ip_packet 1 1 000000000001 00000000ff01 $(ip_to_hex 192 168 1 1) $(ip_to_hex 192 168 2 1) $(ip_to_hex 192 168 1 254) 0000 7dae f4ff
+test_ip6_packet 1 1 000000000001 00000000ff01 20010db8000100000000000000000011 20010db8000200000000000000000011 20010db8000100000000000000000001 d461
 OVN_CHECK_PACKETS([hv1/vif1-tx.pcap], [vif1.expected])
 
 OVN_CLEANUP([hv1], [hv2])