[ovs-dev] [PATCHv2] tunnel-tests: Add test to match tunnel traffic.

[William Tu]

This test highlights a bug that was affecting master up until the
previous patch.  Put simply, we have two bridges: an integration bridge
which contains a tunnel, and a physical bridge for underlay network
connectivity.  This test simulates putting UDP traffic through the
integration bridge, with the intention to apply GRE tunnel headers and
send the packet through the underlay bridge.  The underlay bridge should
observe GRE traffic.

Signed-off-by: William Tu <u9012063 at gmail.com>
Signed-off-by: Joe Stringer <joe at ovn.org>
Acked-by: Greg Rose <gvrose8192 at gmail.com>
---
 tests/tunnel-push-pop.at | 55 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 55 insertions(+)

diff --git a/tests/tunnel-push-pop.at b/tests/tunnel-push-pop.at
index 294d28a2416d..d7936ddc7c1f 100644
--- a/tests/tunnel-push-pop.at
+++ b/tests/tunnel-push-pop.at
@@ -225,3 +225,58 @@ OVS_WAIT_UNTIL([test `ovs-pcap p0.pcap | grep 50540000000a5054000000091235 | wc
 
 OVS_VSWITCHD_STOP
 AT_CLEANUP
+
+AT_SETUP([tunnel_push_pop - matching on physical bridge])
+
+OVS_VSWITCHD_START([add-port br0 p0 -- set Interface p0 type=dummy ofport_request=1 other-config:hwaddr=aa:55:aa:55:00:00])
+AT_CHECK([ovs-vsctl add-br int-br -- set bridge int-br datapath_type=dummy], [0])
+AT_CHECK([ovs-vsctl add-port int-br t1 -- set Interface t1 type=gre \
+                       options:remote_ip=1.1.2.92 options:key=456 ofport_request=3], [0])
+
+AT_CHECK([ovs-appctl dpif/show], [0], [dnl
+dummy at ovs-dummy: hit:0 missed:0
+	br0:
+		br0 65534/100: (dummy-internal)
+		p0 1/1: (dummy)
+	int-br:
+		int-br 65534/2: (dummy-internal)
+		t1 3/3: (gre: key=456, remote_ip=1.1.2.92)
+])
+
+AT_CHECK([ovs-appctl netdev-dummy/ip4addr br0 1.1.2.88/24], [0], [OK
+])
+AT_CHECK([ovs-appctl ovs/route/add 1.1.2.92/24 br0], [0], [OK
+])
+AT_CHECK([ovs-ofctl add-flow br0 'priority=1,action=normal'])
+
+dnl Use ARP reply to achieve tunnel next hop mac binding
+AT_CHECK([ovs-appctl netdev-dummy/receive br0 'recirc_id(0),in_port(100),eth(src=f8:bc:12:44:34:b6,dst=ff:ff:ff:ff:ff:ff),eth_type(0x0806),arp(sip=1.1.2.92,tip=1.1.2.88,op=2,sha=f8:bc:12:44:34:b6,tha=00:00:00:00:00:00)'])
+
+AT_CHECK([ovs-appctl tnl/neigh/show | tail -n+3 | sort], [0], [dnl
+1.1.2.92                                      f8:bc:12:44:34:b6   br0
+])
+
+AT_CHECK([ovs-appctl tnl/ports/show |sort], [0], [dnl
+Listening ports:
+gre_sys (3)
+])
+
+AT_CHECK([ovs-ofctl add-flow br0 'priority=99,udp,action=normal'])
+
+dnl Check GRE tunnel push
+AT_CHECK([ovs-ofctl add-flow int-br action=3])
+
+AT_CHECK([ovs-appctl ofproto/trace ovs-dummy 'in_port(2),eth_type(0x0800),ipv4(src=1.1.3.88,dst=1.1.3.112,proto=17,tos=0,ttl=64,frag=no),udp(src=51283,dst=4789)'], [0], [stdout])
+AT_CHECK([tail -1 stdout], [0],
+  [Datapath actions: tnl_push(tnl_port(3),header(size=42,type=3,eth(dst=f8:bc:12:44:34:b6,src=aa:55:aa:55:00:00,dl_type=0x0800),ipv4(src=1.1.2.88,dst=1.1.2.92,proto=47,tos=0,ttl=64,frag=0x4000),gre((flags=0x2000,proto=0x6558),key=0x1c8)),out_port(100))
+])
+
+AT_CHECK([ovs-appctl netdev-dummy/receive int-br '50540000000a5054000000091234'])
+AT_CHECK([ovs-ofctl dump-flows br0 | ofctl_strip | sort], [0], [dnl)
+ n_packets=2, n_bytes=98, priority=1 actions=NORMAL
+ priority=99,udp actions=NORMAL
+NXST_FLOW reply:
+])
+
+OVS_VSWITCHD_STOP
+AT_CLEANUP
-- 
2.7.4