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Commit c9f93cdf authored by Liang Li's avatar Liang Li
Browse files

Add helper functions to get RFCOMM channel and L2CAP local mtu information 

Flag: com.android.bluetooth.flags.socket_settings_api
Bug: 342012881
Bug: 374358112
Test: m -j
Change-Id: Id94712de7fb1ebdd88dd850db16e176092c10185
parent cfae36f8

system/stack/include/l2cap_interface.h

+17 −0
Original line number Diff line number Diff line
@@ -933,6 +933,23 @@ public: 
   **

   ******************************************************************************/

  virtual bool L2CA_GetAclHandle(uint16_t lcid, uint16_t* acl_handle) = 0;



  /*******************************************************************************

   **

   ** Function         L2CA_GetLocalMtu

   **

   ** Description      Given a local channel identifier, |lcid|, this function

   **                  returns the L2CAP local mtu, |local_mtu|. If

   **                  |lcid| is not known or is invalid, this function returns false and does not

   **                  modify the value pointed at by |local_mtu|.

   **

   ** Parameters:      lcid: Local CID

   **                  local_mtu: Pointer to L2CAP local mtu must NOT be nullptr

   **

   ** Returns          true if local_mtu lookup was successful

   **

   ******************************************************************************/

  virtual bool L2CA_GetLocalMtu(uint16_t lcid, uint16_t* local_mtu) = 0;

};



Interface& get_interface();

system/stack/include/port_api.h

+26 −0
Original line number Diff line number Diff line
@@ -483,4 +483,30 @@ void RFCOMM_Init(void); 
 ******************************************************************************/

[[nodiscard]] int PORT_GetSecurityMask(uint16_t handle, uint16_t* sec_mask);



/*******************************************************************************

 *

 * Function         PORT_GetChannelInfo

 *

 * Description      This function is called to get RFCOMM channel information

 *                  by the handle of the port. All OUT parameters must NOT be nullptr.

 *

 * Parameters:      handle        - Handle of the port returned in the Open

 *                  local_mtu     - OUT local L2CAP MTU

 *                  remote_mtu    - OUT remote L2CAP MTU

 *                  local_credit  - OUT local RFCOMM credit

 *                  remote_credit - OUT remote RFCOMM credit

 *                  local_cid     - OUT local L2CAP CID

 *                  remote_cid    - OUT remote L2CAP CID

 *                  dlci          - OUT dlci

 *                  max_frame_size- OUT max frame size for RFCOMM

 *                  acl_handle    - OUT ACL handle

 *                  mux_initiator - OUT is initiator of the RFCOMM multiplexer control channel

 *

 ******************************************************************************/

[[nodiscard]] int PORT_GetChannelInfo(uint16_t handle, uint16_t* local_mtu, uint16_t* remote_mtu,

                                      uint16_t* local_credit, uint16_t* remote_credit,

                                      uint16_t* local_cid, uint16_t* remote_cid, uint16_t* dlci,

                                      uint16_t* max_frame_size, uint16_t* acl_handle,

                                      bool* mux_initiator);



#endif /* PORT_API_H */

system/stack/l2cap/internal/l2c_api.h

+17 −0
Original line number Diff line number Diff line
@@ -794,3 +794,20 @@ void L2CA_SetMediaStreamChannel(uint16_t local_media_cid, bool status); 
**

******************************************************************************/

[[nodiscard]] bool L2CA_GetAclHandle(uint16_t lcid, uint16_t* acl_handle);



/*******************************************************************************

 **

 ** Function         L2CA_GetLocalMtu

 **

 ** Description      Given a local channel identifier, |lcid|, this function

 **                  returns the L2CAP local mtu, |local_mtu|. If

 **                  |lcid| is not known or is invalid, this function returns false and does not

 **                  modify the value pointed at by |local_mtu|.

 **

 ** Parameters:      lcid: Local CID

 **                  local_mtu: Pointer to L2CAP local mtu must NOT be nullptr

 **

 ** Returns          true if local_mtu lookup was successful

 **

 ******************************************************************************/

[[nodiscard]] bool L2CA_GetLocalMtu(uint16_t lcid, uint16_t* local_mtu);

system/stack/l2cap/l2c_api.cc

+27 −0
Original line number Diff line number Diff line
@@ -1763,6 +1763,33 @@ bool L2CA_GetAclHandle(uint16_t lcid, uint16_t* acl_handle) { 
  return true;

}



/*******************************************************************************

 **

 ** Function         L2CA_GetLocalMtu

 **

 ** Description      Given a local channel identifier, |lcid|, this function

 **                  returns the L2CAP local mtu, |local_mtu|. If

 **                  |lcid| is not known or is invalid, this function returns false and does not

 **                  modify the value pointed at by |local_mtu|.

 **

 ** Parameters:      lcid: Local CID

 **                  local_mtu: Pointer to L2CAP local mtu must NOT be nullptr

 **

 ** Returns          true if local_mtu lookup was successful

 **

 ******************************************************************************/

bool L2CA_GetLocalMtu(uint16_t lcid, uint16_t* local_mtu) {

  log::assert_that(local_mtu != nullptr, "assert failed: local_mtu != nullptr");



  tL2C_CCB* p_ccb = l2cu_find_ccb_by_cid(nullptr, lcid);

  if (p_ccb == nullptr) {

    log::error("No CCB for CID:0x{:04x}", lcid);

    return false;

  }

  *local_mtu = p_ccb->p_rcb->my_mtu;

  return true;

}



using namespace bluetooth;



#define DUMPSYS_TAG "shim::legacy::l2cap"

system/stack/l2cap/l2c_api.h

+2 −0
Original line number Diff line number Diff line
@@ -135,6 +135,8 @@ public: 
                                         bool is_local_cid) override;



  [[nodiscard]] bool L2CA_GetAclHandle(uint16_t lcid, uint16_t* acl_handle) override;



  [[nodiscard]] bool L2CA_GetLocalMtu(uint16_t lcid, uint16_t* local_mtu) override;

};



}  // namespace l2cap