[PATCH] tests: add a test for mesh gate forwarding

[Bob Copeland]

This test checks that mesh nodes forward frames for unknown
destinations to the mesh gates.

Signed-off-by: Bob Copeland <me at bobcopeland.com>
---
 tests/hwsim/test_wpas_mesh.py | 55 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 55 insertions(+)

diff --git a/tests/hwsim/test_wpas_mesh.py b/tests/hwsim/test_wpas_mesh.py
index a05f686e2dfe..00b140cca9cd 100644
--- a/tests/hwsim/test_wpas_mesh.py
+++ b/tests/hwsim/test_wpas_mesh.py
@@ -13,6 +13,9 @@ import subprocess
 import hwsim_utils
 from wpasupplicant import WpaSupplicant
 from utils import HwsimSkip, alloc_fail
+from tshark import run_tshark
+import time
+import os
 
 def check_mesh_support(dev, secure=False):
     if "MESH" not in dev.get_capability("modes"):
@@ -699,3 +702,55 @@ def _test_wpas_mesh_reconnect(dev):
         check_mesh_peer_connected(dev[1])
         dev[0].dump_monitor()
         dev[1].dump_monitor()
+
+def check_frame_at_gate(capfile, da, sa, mesh_da):
+    filt = "wlan.da==%s && wlan.sa==%s && wlan_mgt.fixed.mesh_addr5==%s" % (
+           da, sa, mesh_da)
+
+    out = run_tshark(capfile, filt)
+    if not out:
+        raise Exception("frame to gate %s not observed" % da)
+    pass
+
+
+def test_wpas_mesh_gate_forwarding(dev, apdev, p):
+    """Mesh forwards traffic to unknown sta to mesh gates"""
+    addr0 = dev[0].p2p_interface_addr()
+    addr1 = dev[1].p2p_interface_addr()
+    addr2 = dev[2].p2p_interface_addr()
+    external_sta = '02:11:22:33:44:55'
+
+    # start 3 node connected mesh
+    check_mesh_support(dev[0])
+
+    add_open_mesh_network(dev[0])
+    add_open_mesh_network(dev[1])
+    add_open_mesh_network(dev[2])
+
+    check_mesh_group_added(dev[0])
+    check_mesh_group_added(dev[1])
+    check_mesh_group_added(dev[2])
+
+    check_mesh_peer_connected(dev[0])
+    check_mesh_peer_connected(dev[1])
+    check_mesh_peer_connected(dev[2])
+
+    hwsim_utils.test_connectivity(dev[0], dev[1])
+    hwsim_utils.test_connectivity(dev[1], dev[2])
+    hwsim_utils.test_connectivity(dev[0], dev[2])
+
+    # dev0 and dev1 are mesh gates
+    subprocess.call(['iw', 'dev', dev[0].ifname, 'set', 'mesh_param', 'mesh_gate_announcements=1'])
+    subprocess.call(['iw', 'dev', dev[1].ifname, 'set', 'mesh_param', 'mesh_gate_announcements=1'])
+
+    # wait for gate announcement frames
+    time.sleep(1)
+
+    # data frame from dev2 -> external sta should be sent to both gates
+    dev[2].request("DATA_TEST_CONFIG 1")
+    dev[2].request("DATA_TEST_TX {} {} 0".format(external_sta, addr2))
+    dev[2].request("DATA_TEST_CONFIG 0")
+
+    capfile = os.path.join(p['logdir'], "hwsim0.pcapng")
+    check_frame_at_gate(capfile, addr0, addr2, external_sta)
+    check_frame_at_gate(capfile, addr1, addr2, external_sta)
-- 
2.6.1