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Commit 56e7ad8f authored by Pavlin Radoslavov's avatar Pavlin Radoslavov
Browse files

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 3a7e3cb9)
(cherry picked from commit 3f2ee5b546b65b5b021779588316249276ed3827)
(cherry picked from commit 40c7cefb12ac1a70bf7b1c770c1ab21a5b3f229e)
(cherry picked from commit f7a7f7a948e38195e8ca897785ac5d489082f0cc)
parent cc9b5ed5

system/stack/pan/pan_main.c

+33 −0
Original line number Original line Diff line number Diff line
@@ -222,6 +222,39 @@ void pan_conn_ind_cb (UINT16 handle, 
        return;

        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.

     */

    BOOLEAN 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 */

    /* Requested destination role is */

    if (local_uuid->uu.uuid16 == UUID_SERVCLASS_PANU)

    if (local_uuid->uu.uuid16 == UUID_SERVCLASS_PANU)

        req_role = PAN_ROLE_CLIENT;

        req_role = PAN_ROLE_CLIENT;