Disable PAN Reverse Tethering when connection originated by the Remote
* Check for valid interactions between the three PAN profile roles per
Table 1 in PAN Profile v1.0 spec.
* Explicitly disable connections to the local PANU if the remote is
not PANU.
Bug: 63145701
Test: External script
Change-Id: I29a7e404ba7e4453b6a7c59148a2b3eb7395303a
Merged-In: I29a7e404ba7e4453b6a7c59148a2b3eb7395303a
(cherry picked from commit 9aea2c2f92dd5245f6b35d564ce8e471fec2b4ec)
diff --git a/stack/pan/pan_main.cc b/stack/pan/pan_main.cc
index d89096b..01e1ea4 100644
--- a/stack/pan/pan_main.cc
+++ b/stack/pan/pan_main.cc
@@ -214,6 +214,39 @@
return;
}
+ /* Check for valid interactions between the three PAN profile roles */
+ /*
+ * For reference, see Table 1 in PAN Profile v1.0 spec.
+ * Note: the remote is the initiator.
+ */
+ bool is_valid_interaction = false;
+ switch (remote_uuid->uu.uuid16) {
+ case UUID_SERVCLASS_NAP:
+ case UUID_SERVCLASS_GN:
+ if (local_uuid->uu.uuid16 == UUID_SERVCLASS_PANU)
+ is_valid_interaction = true;
+ break;
+ case UUID_SERVCLASS_PANU:
+ is_valid_interaction = true;
+ break;
+ }
+ /*
+ * Explicitly disable connections to the local PANU if the remote is
+ * not PANU.
+ */
+ if ((local_uuid->uu.uuid16 == UUID_SERVCLASS_PANU) &&
+ (remote_uuid->uu.uuid16 != UUID_SERVCLASS_PANU)) {
+ is_valid_interaction = false;
+ }
+ if (!is_valid_interaction) {
+ PAN_TRACE_ERROR(
+ "PAN Connection failed because of invalid PAN profile roles "
+ "interaction: Remote UUID 0x%x Local UUID 0x%x",
+ remote_uuid->uu.uuid16, local_uuid->uu.uuid16);
+ BNEP_ConnectResp(handle, BNEP_CONN_FAILED_SRC_UUID);
+ return;
+ }
+
/* Requested destination role is */
if (local_uuid->uu.uuid16 == UUID_SERVCLASS_PANU)
req_role = PAN_ROLE_CLIENT;
