tests: Add a test for mesh forwarding

Add a new test that tests connectivity between two stations that
can't reach each other directly in the mesh, but need forwarding
on another station to talk to each other.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>

tests/hwsim/hwsim_utils.py

@@ -187,3 +187,11 @@ def set_powersave(dev, val):
     (res, data) = dev.cmd_execute(["echo", data, ">", fname], shell=True)
     if res != 0:
         raise Exception("Failed to set power save for device")
+
+def set_group_map(dev, val):
+    phy = dev.get_driver_status_field("phyname")
+    fname = '/sys/kernel/debug/ieee80211/%s/hwsim/group' % phy
+    data = '%d' % val
+    (res, data) = dev.cmd_execute(["echo", data, ">", fname], shell=True)
+    if res != 0:
+        raise Exception("Failed to set group map for %s" % phy)

tests/hwsim/test_wpas_mesh.py

@@ -17,6 +17,7 @@ from wpasupplicant import WpaSupplicant
 from utils import HwsimSkip, alloc_fail, fail_test, wait_fail_trigger
 from tshark import run_tshark
 from test_ap_ht import set_world_reg
+from hwsim_utils import set_group_map
 
 def check_mesh_support(dev, secure=False):
     if "MESH" not in dev.get_capability("modes"):
@@ -2034,3 +2035,25 @@ def test_mesh_select_network(dev):
     check_mesh_peer_connected(dev[0])
     check_mesh_peer_connected(dev[1])
     hwsim_utils.test_connectivity(dev[0], dev[1])
+
+def test_mesh_forwarding(dev):
+    """Mesh with two stations that can't reach each other directly"""
+    try:
+        set_group_map(dev[0], 1)
+        set_group_map(dev[1], 3)
+        set_group_map(dev[2], 2)
+        check_mesh_support(dev[0])
+        for i in range(3):
+            add_open_mesh_network(dev[i])
+            check_mesh_group_added(dev[i])
+        for i in range(3):
+            check_mesh_peer_connected(dev[i])
+
+        hwsim_utils.test_connectivity(dev[0], dev[1])
+        hwsim_utils.test_connectivity(dev[1], dev[2])
+        hwsim_utils.test_connectivity(dev[0], dev[2])
+    finally:
+        # reset groups
+        set_group_map(dev[0], 1)
+        set_group_map(dev[1], 1)
+        set_group_map(dev[2], 1)