476 lines
15 KiB
C
Executable file
476 lines
15 KiB
C
Executable file
/******************************************************************************
|
|
*
|
|
* Copyright (C) 2003-2012 Broadcom Corporation
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at:
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*
|
|
******************************************************************************/
|
|
|
|
/******************************************************************************
|
|
*
|
|
* This module contains API of the audio/video control transport protocol.
|
|
*
|
|
******************************************************************************/
|
|
|
|
#include <string.h>
|
|
#include "bt_types.h"
|
|
#include "bt_target.h"
|
|
#include "bt_utils.h"
|
|
#include "gki.h"
|
|
#include "l2c_api.h"
|
|
#include "l2cdefs.h"
|
|
#include "btm_api.h"
|
|
#include "avct_api.h"
|
|
#include "avct_int.h"
|
|
|
|
#if (defined(AVCT_INCLUDED) && AVCT_INCLUDED == TRUE)
|
|
|
|
/* Control block for AVCT */
|
|
#if AVCT_DYNAMIC_MEMORY == FALSE
|
|
tAVCT_CB avct_cb;
|
|
#endif
|
|
|
|
/*******************************************************************************
|
|
**
|
|
** Function AVCT_Register
|
|
**
|
|
** Description This is the system level registration function for the
|
|
** AVCTP protocol. This function initializes AVCTP and
|
|
** prepares the protocol stack for its use. This function
|
|
** must be called once by the system or platform using AVCTP
|
|
** before the other functions of the API an be used.
|
|
**
|
|
**
|
|
** Returns void
|
|
**
|
|
*******************************************************************************/
|
|
void AVCT_Register(UINT16 mtu, UINT16 mtu_br, UINT8 sec_mask)
|
|
{
|
|
UNUSED(mtu_br);
|
|
|
|
AVCT_TRACE_API("AVCT_Register");
|
|
|
|
/* register PSM with L2CAP */
|
|
L2CA_Register(AVCT_PSM, (tL2CAP_APPL_INFO *) &avct_l2c_appl);
|
|
|
|
/* set security level */
|
|
BTM_SetSecurityLevel(TRUE, "", BTM_SEC_SERVICE_AVCTP, sec_mask, AVCT_PSM, 0, 0);
|
|
BTM_SetSecurityLevel(FALSE, "", BTM_SEC_SERVICE_AVCTP, sec_mask, AVCT_PSM, 0, 0);
|
|
|
|
/* initialize AVCTP data structures */
|
|
memset(&avct_cb, 0, sizeof(tAVCT_CB));
|
|
|
|
#if (AVCT_BROWSE_INCLUDED == TRUE)
|
|
/* Include the browsing channel which uses eFCR */
|
|
L2CA_Register(AVCT_BR_PSM, (tL2CAP_APPL_INFO *) &avct_l2c_br_appl);
|
|
|
|
BTM_SetSecurityLevel(TRUE, "", BTM_SEC_SERVICE_AVCTP_BROWSE, sec_mask, AVCT_BR_PSM, 0, 0);
|
|
BTM_SetSecurityLevel(FALSE, "", BTM_SEC_SERVICE_AVCTP_BROWSE, sec_mask, AVCT_BR_PSM, 0, 0);
|
|
|
|
if (mtu_br < AVCT_MIN_BROWSE_MTU)
|
|
mtu_br = AVCT_MIN_BROWSE_MTU;
|
|
avct_cb.mtu_br = mtu_br;
|
|
#endif
|
|
|
|
#if defined(AVCT_INITIAL_TRACE_LEVEL)
|
|
avct_cb.trace_level = AVCT_INITIAL_TRACE_LEVEL;
|
|
#else
|
|
avct_cb.trace_level = BT_TRACE_LEVEL_NONE;
|
|
#endif
|
|
|
|
if (mtu < AVCT_MIN_CONTROL_MTU)
|
|
mtu = AVCT_MIN_CONTROL_MTU;
|
|
/* store mtu */
|
|
avct_cb.mtu = mtu;
|
|
}
|
|
|
|
/*******************************************************************************
|
|
**
|
|
** Function AVCT_Deregister
|
|
**
|
|
** Description This function is called to deregister use AVCTP protocol.
|
|
** It is called when AVCTP is no longer being used by any
|
|
** application in the system. Before this function can be
|
|
** called, all connections must be removed with
|
|
** AVCT_RemoveConn().
|
|
**
|
|
**
|
|
** Returns void
|
|
**
|
|
*******************************************************************************/
|
|
void AVCT_Deregister(void)
|
|
{
|
|
AVCT_TRACE_API("AVCT_Deregister");
|
|
|
|
/* deregister PSM with L2CAP */
|
|
L2CA_Deregister(AVCT_PSM);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
**
|
|
** Function AVCT_CreateConn
|
|
**
|
|
** Description Create an AVCTP connection. There are two types of
|
|
** connections, initiator and acceptor, as determined by
|
|
** the p_cc->role parameter. When this function is called to
|
|
** create an initiator connection, an AVCTP connection to
|
|
** the peer device is initiated if one does not already exist.
|
|
** If an acceptor connection is created, the connection waits
|
|
** passively for an incoming AVCTP connection from a peer device.
|
|
**
|
|
**
|
|
** Returns AVCT_SUCCESS if successful, otherwise error.
|
|
**
|
|
*******************************************************************************/
|
|
UINT16 AVCT_CreateConn(UINT8 *p_handle, tAVCT_CC *p_cc, BD_ADDR peer_addr)
|
|
{
|
|
UINT16 result = AVCT_SUCCESS;
|
|
tAVCT_CCB *p_ccb;
|
|
tAVCT_LCB *p_lcb;
|
|
|
|
AVCT_TRACE_API("AVCT_CreateConn: %d, control:%d", p_cc->role, p_cc->control);
|
|
|
|
/* Allocate ccb; if no ccbs, return failure */
|
|
if ((p_ccb = avct_ccb_alloc(p_cc)) == NULL)
|
|
{
|
|
result = AVCT_NO_RESOURCES;
|
|
}
|
|
else
|
|
{
|
|
/* get handle */
|
|
*p_handle = avct_ccb_to_idx(p_ccb);
|
|
|
|
/* if initiator connection */
|
|
if (p_cc->role == AVCT_INT)
|
|
{
|
|
/* find link; if none allocate a new one */
|
|
if ((p_lcb = avct_lcb_by_bd(peer_addr)) == NULL)
|
|
{
|
|
if ((p_lcb = avct_lcb_alloc(peer_addr)) == NULL)
|
|
{
|
|
/* no link resources; free ccb as well */
|
|
avct_ccb_dealloc(p_ccb, AVCT_NO_EVT, 0, NULL);
|
|
result = AVCT_NO_RESOURCES;
|
|
}
|
|
}
|
|
/* check if PID already in use */
|
|
else if (avct_lcb_has_pid(p_lcb, p_cc->pid))
|
|
{
|
|
avct_ccb_dealloc(p_ccb, AVCT_NO_EVT, 0, NULL);
|
|
result = AVCT_PID_IN_USE;
|
|
}
|
|
|
|
if (result == AVCT_SUCCESS)
|
|
{
|
|
/* bind lcb to ccb */
|
|
p_ccb->p_lcb = p_lcb;
|
|
AVCT_TRACE_DEBUG("ch_state: %d", p_lcb->ch_state);
|
|
avct_lcb_event(p_lcb, AVCT_LCB_UL_BIND_EVT, (tAVCT_LCB_EVT *) &p_ccb);
|
|
}
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/*******************************************************************************
|
|
**
|
|
** Function AVCT_RemoveConn
|
|
**
|
|
** Description Remove an AVCTP connection. This function is called when
|
|
** the application is no longer using a connection. If this
|
|
** is the last connection to a peer the L2CAP channel for AVCTP
|
|
** will be closed.
|
|
**
|
|
**
|
|
** Returns AVCT_SUCCESS if successful, otherwise error.
|
|
**
|
|
*******************************************************************************/
|
|
UINT16 AVCT_RemoveConn(UINT8 handle)
|
|
{
|
|
UINT16 result = AVCT_SUCCESS;
|
|
tAVCT_CCB *p_ccb;
|
|
|
|
AVCT_TRACE_API("AVCT_RemoveConn");
|
|
|
|
/* map handle to ccb */
|
|
if ((p_ccb = avct_ccb_by_idx(handle)) == NULL)
|
|
{
|
|
result = AVCT_BAD_HANDLE;
|
|
}
|
|
/* if connection not bound to lcb, dealloc */
|
|
else if (p_ccb->p_lcb == NULL)
|
|
{
|
|
avct_ccb_dealloc(p_ccb, AVCT_NO_EVT, 0, NULL);
|
|
}
|
|
/* send unbind event to lcb */
|
|
else
|
|
{
|
|
avct_lcb_event(p_ccb->p_lcb, AVCT_LCB_UL_UNBIND_EVT, (tAVCT_LCB_EVT *) &p_ccb);
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/*******************************************************************************
|
|
**
|
|
** Function AVCT_CreateBrowse
|
|
**
|
|
** Description Create an AVCTP Browse channel. There are two types of
|
|
** connections, initiator and acceptor, as determined by
|
|
** the role parameter. When this function is called to
|
|
** create an initiator connection, the Browse channel to
|
|
** the peer device is initiated if one does not already exist.
|
|
** If an acceptor connection is created, the connection waits
|
|
** passively for an incoming AVCTP connection from a peer device.
|
|
**
|
|
**
|
|
** Returns AVCT_SUCCESS if successful, otherwise error.
|
|
**
|
|
*******************************************************************************/
|
|
UINT16 AVCT_CreateBrowse (UINT8 handle, UINT8 role)
|
|
{
|
|
#if (AVCT_BROWSE_INCLUDED == TRUE)
|
|
UINT16 result = AVCT_SUCCESS;
|
|
tAVCT_CCB *p_ccb;
|
|
tAVCT_BCB *p_bcb;
|
|
int index;
|
|
|
|
AVCT_TRACE_API("AVCT_CreateBrowse: %d", role);
|
|
|
|
/* map handle to ccb */
|
|
if ((p_ccb = avct_ccb_by_idx(handle)) == NULL)
|
|
{
|
|
return AVCT_BAD_HANDLE;
|
|
}
|
|
else
|
|
{
|
|
/* mark this CCB as supporting browsing channel */
|
|
if ((p_ccb->allocated & AVCT_ALOC_BCB) == 0)
|
|
{
|
|
p_ccb->allocated |= AVCT_ALOC_BCB;
|
|
}
|
|
}
|
|
|
|
/* if initiator connection */
|
|
if (role == AVCT_INT)
|
|
{
|
|
/* the link control block must exist before this function is called as INT. */
|
|
if ((p_ccb->p_lcb == NULL) || (p_ccb->p_lcb->allocated == 0))
|
|
{
|
|
result = AVCT_NOT_OPEN;
|
|
}
|
|
else
|
|
{
|
|
/* find link; if none allocate a new one */
|
|
index = p_ccb->p_lcb->allocated;
|
|
if (index > AVCT_NUM_LINKS)
|
|
{
|
|
result = AVCT_BAD_HANDLE;
|
|
}
|
|
else
|
|
{
|
|
p_bcb = &avct_cb.bcb[index - 1];
|
|
p_bcb->allocated = index;
|
|
}
|
|
}
|
|
|
|
if (result == AVCT_SUCCESS)
|
|
{
|
|
/* bind bcb to ccb */
|
|
p_ccb->p_bcb = p_bcb;
|
|
AVCT_TRACE_DEBUG("ch_state: %d", p_bcb->ch_state);
|
|
avct_bcb_event(p_bcb, AVCT_LCB_UL_BIND_EVT, (tAVCT_LCB_EVT *) &p_ccb);
|
|
}
|
|
}
|
|
|
|
return result;
|
|
#else
|
|
UNUSED(handle);
|
|
UNUSED(role);
|
|
return AVCT_NO_RESOURCES;
|
|
#endif
|
|
}
|
|
|
|
/*******************************************************************************
|
|
**
|
|
** Function AVCT_RemoveBrowse
|
|
**
|
|
** Description Remove an AVCTP Browse channel. This function is called when
|
|
** the application is no longer using a connection. If this
|
|
** is the last connection to a peer the L2CAP channel for AVCTP
|
|
** will be closed.
|
|
**
|
|
**
|
|
** Returns AVCT_SUCCESS if successful, otherwise error.
|
|
**
|
|
*******************************************************************************/
|
|
UINT16 AVCT_RemoveBrowse (UINT8 handle)
|
|
{
|
|
#if (AVCT_BROWSE_INCLUDED == TRUE)
|
|
UINT16 result = AVCT_SUCCESS;
|
|
tAVCT_CCB *p_ccb;
|
|
|
|
AVCT_TRACE_API("AVCT_RemoveBrowse");
|
|
|
|
/* map handle to ccb */
|
|
if ((p_ccb = avct_ccb_by_idx(handle)) == NULL)
|
|
{
|
|
result = AVCT_BAD_HANDLE;
|
|
}
|
|
else if (p_ccb->p_bcb != NULL)
|
|
/* send unbind event to bcb */
|
|
{
|
|
avct_bcb_event(p_ccb->p_bcb, AVCT_LCB_UL_UNBIND_EVT, (tAVCT_LCB_EVT *) &p_ccb);
|
|
}
|
|
return result;
|
|
#else
|
|
UNUSED(handle);
|
|
return AVCT_NO_RESOURCES;
|
|
#endif
|
|
}
|
|
|
|
/*******************************************************************************
|
|
**
|
|
** Function AVCT_GetBrowseMtu
|
|
**
|
|
** Description Get the peer_mtu for the AVCTP Browse channel of the given
|
|
** connection.
|
|
**
|
|
** Returns the peer browsing channel MTU.
|
|
**
|
|
*******************************************************************************/
|
|
UINT16 AVCT_GetBrowseMtu (UINT8 handle)
|
|
{
|
|
UINT16 peer_mtu = AVCT_MIN_BROWSE_MTU;
|
|
#if (AVCT_BROWSE_INCLUDED == TRUE)
|
|
tAVCT_CCB *p_ccb;
|
|
|
|
if ((p_ccb = avct_ccb_by_idx(handle)) != NULL && p_ccb->p_bcb != NULL)
|
|
{
|
|
peer_mtu = p_ccb->p_bcb->peer_mtu;
|
|
}
|
|
#else
|
|
UNUSED(handle);
|
|
#endif
|
|
return peer_mtu;
|
|
}
|
|
|
|
/*******************************************************************************
|
|
**
|
|
** Function AVCT_GetPeerMtu
|
|
**
|
|
** Description Get the peer_mtu for the AVCTP channel of the given
|
|
** connection.
|
|
**
|
|
** Returns the peer MTU size.
|
|
**
|
|
*******************************************************************************/
|
|
UINT16 AVCT_GetPeerMtu (UINT8 handle)
|
|
{
|
|
UINT16 peer_mtu = L2CAP_DEFAULT_MTU;
|
|
tAVCT_CCB *p_ccb;
|
|
|
|
/* map handle to ccb */
|
|
if ((p_ccb = avct_ccb_by_idx(handle)) != NULL)
|
|
{
|
|
if (p_ccb->p_lcb)
|
|
{
|
|
peer_mtu = p_ccb->p_lcb->peer_mtu;
|
|
}
|
|
}
|
|
|
|
return peer_mtu;
|
|
}
|
|
|
|
/*******************************************************************************
|
|
**
|
|
** Function AVCT_MsgReq
|
|
**
|
|
** Description Send an AVCTP message to a peer device. In calling
|
|
** AVCT_MsgReq(), the application should keep track of the
|
|
** congestion state of AVCTP as communicated with events
|
|
** AVCT_CONG_IND_EVT and AVCT_UNCONG_IND_EVT. If the
|
|
** application calls AVCT_MsgReq() when AVCTP is congested
|
|
** the message may be discarded. The application may make its
|
|
** first call to AVCT_MsgReq() after it receives an
|
|
** AVCT_CONNECT_CFM_EVT or AVCT_CONNECT_IND_EVT on control channel or
|
|
** AVCT_BROWSE_CONN_CFM_EVT or AVCT_BROWSE_CONN_IND_EVT on browsing channel.
|
|
**
|
|
** p_msg->layer_specific must be set to
|
|
** AVCT_DATA_CTRL for control channel traffic;
|
|
** AVCT_DATA_BROWSE for for browse channel traffic.
|
|
**
|
|
** Returns AVCT_SUCCESS if successful, otherwise error.
|
|
**
|
|
*******************************************************************************/
|
|
UINT16 AVCT_MsgReq(UINT8 handle, UINT8 label, UINT8 cr, BT_HDR *p_msg)
|
|
{
|
|
UINT16 result = AVCT_SUCCESS;
|
|
tAVCT_CCB *p_ccb;
|
|
tAVCT_UL_MSG ul_msg;
|
|
|
|
AVCT_TRACE_API("AVCT_MsgReq");
|
|
|
|
/* verify p_msg parameter */
|
|
if (p_msg == NULL)
|
|
{
|
|
return AVCT_NO_RESOURCES;
|
|
}
|
|
AVCT_TRACE_API("len: %d", p_msg->len);
|
|
|
|
/* map handle to ccb */
|
|
if ((p_ccb = avct_ccb_by_idx(handle)) == NULL)
|
|
{
|
|
result = AVCT_BAD_HANDLE;
|
|
GKI_freebuf(p_msg);
|
|
}
|
|
/* verify channel is bound to link */
|
|
else if (p_ccb->p_lcb == NULL)
|
|
{
|
|
result = AVCT_NOT_OPEN;
|
|
GKI_freebuf(p_msg);
|
|
}
|
|
|
|
if (result == AVCT_SUCCESS)
|
|
{
|
|
ul_msg.p_buf = p_msg;
|
|
ul_msg.p_ccb = p_ccb;
|
|
ul_msg.label = label;
|
|
ul_msg.cr = cr;
|
|
|
|
#if (AVCT_BROWSE_INCLUDED == TRUE)
|
|
/* send msg event to bcb */
|
|
if (p_msg->layer_specific == AVCT_DATA_BROWSE)
|
|
{
|
|
if (p_ccb->p_bcb == NULL && (p_ccb->allocated & AVCT_ALOC_BCB) == 0)
|
|
{
|
|
/* BCB channel is not open and not allocated */
|
|
result = AVCT_BAD_HANDLE;
|
|
GKI_freebuf(p_msg);
|
|
}
|
|
else
|
|
{
|
|
p_ccb->p_bcb = avct_bcb_by_lcb(p_ccb->p_lcb);
|
|
avct_bcb_event(p_ccb->p_bcb, AVCT_LCB_UL_MSG_EVT, (tAVCT_LCB_EVT *) &ul_msg);
|
|
}
|
|
}
|
|
/* send msg event to lcb */
|
|
else
|
|
#endif
|
|
{
|
|
avct_lcb_event(p_ccb->p_lcb, AVCT_LCB_UL_MSG_EVT, (tAVCT_LCB_EVT *) &ul_msg);
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
|
|
#endif /* #if (defined(AVCT_INCLUDED) && AVCT_INCLUDED == TRUE) */
|