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esp-idf/components/bt/host/bluedroid/stack/l2cap/l2c_api.c
“YangZhao” 12ec4866b8 Fix the high-impact issues from the code analysis report from customer. 
For the CID10564,10384,10280,10098,10038,The memory was released in other place.
For the CID10365,it release the memory in the function when sent successfully.
For the CID10268,10011, we need not change the code.
2021-11-22 17:38:02 +08:00

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/******************************************************************************
*
* Copyright (C) 1999-2012 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 file contains the L2CAP API code
*
******************************************************************************/
//#define LOG_TAG "bt_l2cap"
//#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include "common/bt_trace.h"
#include "stack/bt_types.h"
#include "stack/hcidefs.h"
#include "stack/hcimsgs.h"
#include "stack/l2cdefs.h"
#include "l2c_int.h"
#include "stack/btu.h"
#include "stack/btm_api.h"
#include "osi/allocator.h"
#include "gatt_int.h"
#if (CLASSIC_BT_INCLUDED == TRUE)
/*******************************************************************************
**
** Function L2CA_Register
**
** Description Other layers call this function to register for L2CAP
** services.
**
** Returns PSM to use or zero if error. Typically, the PSM returned
** is the same as was passed in, but for an outgoing-only
** connection to a dynamic PSM, a "virtual" PSM is returned
** and should be used in the calls to L2CA_ConnectReq(),
** L2CA_ErtmConnectReq() and L2CA_Deregister()
**
*******************************************************************************/
UINT16 L2CA_Register (UINT16 psm, tL2CAP_APPL_INFO *p_cb_info)
{
tL2C_RCB *p_rcb;
UINT16 vpsm = psm;
/* Verify that the required callback info has been filled in
** Note: Connection callbacks are required but not checked
** for here because it is possible to be only a client
** or only a server.
*/
if ((!p_cb_info->pL2CA_ConfigCfm_Cb)
|| (!p_cb_info->pL2CA_ConfigInd_Cb)
|| (!p_cb_info->pL2CA_DataInd_Cb)
|| (!p_cb_info->pL2CA_DisconnectInd_Cb)) {
L2CAP_TRACE_ERROR ("L2CAP - no cb registering PSM: 0x%04x", psm);
return (0);
}
/* Verify PSM is valid */
if (L2C_INVALID_PSM(psm)) {
L2CAP_TRACE_ERROR ("L2CAP - invalid PSM value, PSM: 0x%04x", psm);
return (0);
}
/* Check if this is a registration for an outgoing-only connection to */
/* a dynamic PSM. If so, allocate a "virtual" PSM for the app to use. */
if ( (psm >= 0x1001) && (p_cb_info->pL2CA_ConnectInd_Cb == NULL) ) {
for (vpsm = 0x1002; vpsm < 0x8000; vpsm += 2) {
if ((p_rcb = l2cu_find_rcb_by_psm (vpsm)) == NULL) {
break;
}
}
//L2CAP_TRACE_API ("L2CA_Register - Real PSM: 0x%04x Virtual PSM: 0x%04x", psm, vpsm);
}
/* If registration block already there, just overwrite it */
if ((p_rcb = l2cu_find_rcb_by_psm (vpsm)) == NULL) {
if ((p_rcb = l2cu_allocate_rcb (vpsm)) == NULL) {
L2CAP_TRACE_WARNING ("L2CAP - no RCB available, PSM: 0x%04x vPSM: 0x%04x", psm, vpsm);
return (0);
}
}
p_rcb->api = *p_cb_info;
p_rcb->real_psm = psm;
return (vpsm);
}
/*******************************************************************************
**
** Function L2CA_Deregister
**
** Description Other layers call this function to de-register for L2CAP
** services.
**
** Returns void
**
*******************************************************************************/
void L2CA_Deregister (UINT16 psm)
{
tL2C_RCB *p_rcb;
tL2C_CCB *p_ccb;
tL2C_LCB *p_lcb;
list_node_t *p_node = NULL;
if ((p_rcb = l2cu_find_rcb_by_psm (psm)) != NULL) {
for (p_node = list_begin(l2cb.p_lcb_pool); p_node; p_node = list_next(p_node)) {
p_lcb = list_node(p_node);
if (p_lcb->in_use) {
if (((p_ccb = p_lcb->ccb_queue.p_first_ccb) == NULL)
|| (p_lcb->link_state == LST_DISCONNECTING)) {
continue;
}
if ((p_ccb->in_use) &&
((p_ccb->chnl_state == CST_W4_L2CAP_DISCONNECT_RSP) ||
(p_ccb->chnl_state == CST_W4_L2CA_DISCONNECT_RSP))) {
continue;
}
if (p_ccb->p_rcb == p_rcb) {
l2c_csm_execute (p_ccb, L2CEVT_L2CA_DISCONNECT_REQ, NULL);
}
}
}
l2cu_release_rcb (p_rcb);
} else {
L2CAP_TRACE_WARNING ("L2CAP - PSM: 0x%04x not found for deregistration", psm);
}
}
/*******************************************************************************
**
** Function L2CA_AllocatePSM
**
** Description Other layers call this function to find an unused PSM for L2CAP
** services.
**
** Returns PSM to use.
**
*******************************************************************************/
UINT16 L2CA_AllocatePSM(void)
{
BOOLEAN done = FALSE;
UINT16 psm = l2cb.dyn_psm;
while (!done) {
psm += 2;
if (psm > 0xfeff) {
psm = 0x1001;
} else if (psm & 0x0100) {
/* the upper byte must be even */
psm += 0x0100;
}
/* if psm is in range of reserved BRCM Aware features */
if ((BRCM_RESERVED_PSM_START <= psm) && (psm <= BRCM_RESERVED_PSM_END)) {
continue;
}
/* make sure the newlly allocated psm is not used right now */
if ((l2cu_find_rcb_by_psm (psm)) == NULL) {
done = TRUE;
}
}
l2cb.dyn_psm = psm;
return (psm);
}
/*******************************************************************************
**
** Function L2CA_ConnectReq
**
** Description Higher layers call this function to create an L2CAP connection.
** Note that the connection is not established at this time, but
** connection establishment gets started. The callback function
** will be invoked when connection establishes or fails.
**
** Returns the CID of the connection, or 0 if it failed to start
**
*******************************************************************************/
UINT16 L2CA_ConnectReq (UINT16 psm, BD_ADDR p_bd_addr)
{
return L2CA_ErtmConnectReq (psm, p_bd_addr, NULL);
}
/*******************************************************************************
**
** Function L2CA_ErtmConnectReq
**
** Description Higher layers call this function to create an L2CAP connection.
** Note that the connection is not established at this time, but
** connection establishment gets started. The callback function
** will be invoked when connection establishes or fails.
**
** Parameters: PSM: L2CAP PSM for the connection
** BD address of the peer
** Enhaced retransmission mode configurations
** Returns the CID of the connection, or 0 if it failed to start
**
*******************************************************************************/
UINT16 L2CA_ErtmConnectReq (UINT16 psm, BD_ADDR p_bd_addr, tL2CAP_ERTM_INFO *p_ertm_info)
{
tL2C_LCB *p_lcb;
tL2C_CCB *p_ccb;
tL2C_RCB *p_rcb;
//counter_add("l2cap.conn.req", 1);
L2CAP_TRACE_API ("L2CA_ErtmConnectReq() PSM: 0x%04x BDA: %08x%04x p_ertm_info: %p allowed:0x%x preferred:%d", psm,
(p_bd_addr[0] << 24) + (p_bd_addr[1] << 16) + (p_bd_addr[2] << 8) + p_bd_addr[3],
(p_bd_addr[4] << 8) + p_bd_addr[5], p_ertm_info,
(p_ertm_info) ? p_ertm_info->allowed_modes : 0,
(p_ertm_info) ? p_ertm_info->preferred_mode : 0);
/* Fail if we have not established communications with the controller */
if (!BTM_IsDeviceUp()) {
L2CAP_TRACE_WARNING ("L2CAP connect req - BTU not ready");
return (0);
}
/* Fail if the PSM is not registered */
if ((p_rcb = l2cu_find_rcb_by_psm (psm)) == NULL) {
L2CAP_TRACE_WARNING ("L2CAP - no RCB for L2CA_conn_req, PSM: 0x%04x", psm);
return (0);
}
/* First, see if we already have a link to the remote */
/* assume all ERTM l2cap connection is going over BR/EDR for now */
if ((p_lcb = l2cu_find_lcb_by_bd_addr (p_bd_addr, BT_TRANSPORT_BR_EDR)) == NULL) {
/* No link. Get an LCB and start link establishment */
if ( ((p_lcb = l2cu_allocate_lcb (p_bd_addr, FALSE, BT_TRANSPORT_BR_EDR)) == NULL)
/* currently use BR/EDR for ERTM mode l2cap connection */
|| (l2cu_create_conn(p_lcb, BT_TRANSPORT_BR_EDR) == FALSE) ) {
L2CAP_TRACE_WARNING ("L2CAP - conn not started for PSM: 0x%04x p_lcb: %p", psm, p_lcb);
return (0);
}
}
/* Allocate a channel control block */
if ((p_ccb = l2cu_allocate_ccb (p_lcb, 0)) == NULL) {
L2CAP_TRACE_WARNING ("L2CAP - no CCB for L2CA_conn_req, PSM: 0x%04x", psm);
return (0);
}
/* Save registration info */
p_ccb->p_rcb = p_rcb;
if (p_ertm_info) {
p_ccb->ertm_info = *p_ertm_info;
/* Replace default indicators with the actual default pool */
if (p_ccb->ertm_info.fcr_rx_buf_size == L2CAP_INVALID_ERM_BUF_SIZE) {
p_ccb->ertm_info.fcr_rx_buf_size = L2CAP_FCR_RX_BUF_SIZE;
}
if (p_ccb->ertm_info.fcr_tx_buf_size == L2CAP_INVALID_ERM_BUF_SIZE) {
p_ccb->ertm_info.fcr_tx_buf_size = L2CAP_FCR_TX_BUF_SIZE;
}
if (p_ccb->ertm_info.user_rx_buf_size == L2CAP_INVALID_ERM_BUF_SIZE) {
p_ccb->ertm_info.user_rx_buf_size = L2CAP_USER_RX_BUF_SIZE;
}
if (p_ccb->ertm_info.user_tx_buf_size == L2CAP_INVALID_ERM_BUF_SIZE) {
p_ccb->ertm_info.user_tx_buf_size = L2CAP_USER_TX_BUF_SIZE;
}
p_ccb->max_rx_mtu = p_ertm_info->user_rx_buf_size -
(L2CAP_MIN_OFFSET + L2CAP_SDU_LEN_OFFSET + L2CAP_FCS_LEN);
}
/* If link is up, start the L2CAP connection */
if (p_lcb->link_state == LST_CONNECTED) {
l2c_csm_execute (p_ccb, L2CEVT_L2CA_CONNECT_REQ, NULL);
}
/* If link is disconnecting, save link info to retry after disconnect
* Possible Race condition when a reconnect occurs
* on the channel during a disconnect of link. This
* ccb will be automatically retried after link disconnect
* arrives
*/
else if (p_lcb->link_state == LST_DISCONNECTING) {
L2CAP_TRACE_DEBUG ("L2CAP API - link disconnecting: RETRY LATER");
/* Save ccb so it can be started after disconnect is finished */
p_lcb->p_pending_ccb = p_ccb;
}
L2CAP_TRACE_API ("L2CAP - L2CA_conn_req(psm: 0x%04x) returned CID: 0x%04x", psm, p_ccb->local_cid);
/* Return the local CID as our handle */
return (p_ccb->local_cid);
}
bool L2CA_SetConnectionCallbacks(uint16_t local_cid, const tL2CAP_APPL_INFO *callbacks)
{
assert(callbacks != NULL);
assert(callbacks->pL2CA_ConnectInd_Cb == NULL);
assert(callbacks->pL2CA_ConnectCfm_Cb != NULL);
assert(callbacks->pL2CA_ConfigInd_Cb != NULL);
assert(callbacks->pL2CA_ConfigCfm_Cb != NULL);
assert(callbacks->pL2CA_DisconnectInd_Cb != NULL);
assert(callbacks->pL2CA_DisconnectCfm_Cb != NULL);
assert(callbacks->pL2CA_CongestionStatus_Cb != NULL);
assert(callbacks->pL2CA_DataInd_Cb != NULL);
assert(callbacks->pL2CA_TxComplete_Cb != NULL);
tL2C_CCB *channel_control_block = l2cu_find_ccb_by_cid(NULL, local_cid);
if (!channel_control_block) {
L2CAP_TRACE_ERROR("%s no channel control block found for L2CAP LCID=0x%04x.", __func__, local_cid);
return false;
}
// We're making a connection-specific registration control block so we check if
// we already have a private one allocated to us on the heap. If not, we make a
// new allocation, mark it as heap-allocated, and inherit the fields from the old
// control block.
tL2C_RCB *registration_control_block = channel_control_block->p_rcb;
if (!channel_control_block->should_free_rcb) {
registration_control_block = (tL2C_RCB *)osi_calloc(sizeof(tL2C_RCB));
if (!registration_control_block) {
L2CAP_TRACE_ERROR("%s unable to allocate registration control block.", __func__);
return false;
}
*registration_control_block = *channel_control_block->p_rcb;
channel_control_block->p_rcb = registration_control_block;
channel_control_block->should_free_rcb = true;
}
registration_control_block->api = *callbacks;
return true;
}
/*******************************************************************************
**
** Function L2CA_ConnectRsp
**
** Description Higher layers call this function to accept an incoming
** L2CAP connection, for which they had gotten an connect
** indication callback.
**
** Returns TRUE for success, FALSE for failure
**
*******************************************************************************/
BOOLEAN L2CA_ConnectRsp (BD_ADDR p_bd_addr, UINT8 id, UINT16 lcid,
UINT16 result, UINT16 status)
{
return L2CA_ErtmConnectRsp (p_bd_addr, id, lcid, result, status, NULL);
}
/*******************************************************************************
**
** Function L2CA_ErtmConnectRsp
**
** Description Higher layers call this function to accept an incoming
** L2CAP connection, for which they had gotten an connect
** indication callback.
**
** Returns TRUE for success, FALSE for failure
**
*******************************************************************************/
BOOLEAN L2CA_ErtmConnectRsp (BD_ADDR p_bd_addr, UINT8 id, UINT16 lcid, UINT16 result,
UINT16 status, tL2CAP_ERTM_INFO *p_ertm_info)
{
tL2C_LCB *p_lcb;
tL2C_CCB *p_ccb;
//counter_add("l2cap.conn.rsp", 1);
L2CAP_TRACE_API ("L2CA_ErtmConnectRsp() CID: 0x%04x Result: %d Status: %d BDA: %08x%04x p_ertm_info:%p",
lcid, result, status,
(p_bd_addr[0] << 24) + (p_bd_addr[1] << 16) + (p_bd_addr[2] << 8) + p_bd_addr[3],
(p_bd_addr[4] << 8) + p_bd_addr[5], p_ertm_info);
/* First, find the link control block */
if ((p_lcb = l2cu_find_lcb_by_bd_addr (p_bd_addr, BT_TRANSPORT_BR_EDR)) == NULL) {
/* No link. Get an LCB and start link establishment */
L2CAP_TRACE_WARNING ("L2CAP - no LCB for L2CA_conn_rsp");
return (FALSE);
}
/* Now, find the channel control block */
if ((p_ccb = l2cu_find_ccb_by_cid (p_lcb, lcid)) == NULL) {
L2CAP_TRACE_WARNING ("L2CAP - no CCB for L2CA_conn_rsp");
return (FALSE);
}
/* The IDs must match */
if (p_ccb->remote_id != id) {
L2CAP_TRACE_WARNING ("L2CAP - bad id in L2CA_conn_rsp. Exp: %d Got: %d", p_ccb->remote_id, id);
return (FALSE);
}
if (p_ertm_info) {
p_ccb->ertm_info = *p_ertm_info;
/* Replace default indicators with the actual default pool */
if (p_ccb->ertm_info.fcr_rx_buf_size == L2CAP_INVALID_ERM_BUF_SIZE) {
p_ccb->ertm_info.fcr_rx_buf_size = L2CAP_FCR_RX_BUF_SIZE;
}
if (p_ccb->ertm_info.fcr_tx_buf_size == L2CAP_INVALID_ERM_BUF_SIZE) {
p_ccb->ertm_info.fcr_tx_buf_size = L2CAP_FCR_TX_BUF_SIZE;
}
if (p_ccb->ertm_info.user_rx_buf_size == L2CAP_INVALID_ERM_BUF_SIZE) {
p_ccb->ertm_info.user_rx_buf_size = L2CAP_USER_RX_BUF_SIZE;
}
if (p_ccb->ertm_info.user_tx_buf_size == L2CAP_INVALID_ERM_BUF_SIZE) {
p_ccb->ertm_info.user_tx_buf_size = L2CAP_USER_TX_BUF_SIZE;
}
p_ccb->max_rx_mtu = p_ertm_info->user_rx_buf_size -
(L2CAP_MIN_OFFSET + L2CAP_SDU_LEN_OFFSET + L2CAP_FCS_LEN);
}
if (result == L2CAP_CONN_OK) {
l2c_csm_execute (p_ccb, L2CEVT_L2CA_CONNECT_RSP, NULL);
} else {
tL2C_CONN_INFO conn_info;
conn_info.l2cap_result = result;
conn_info.l2cap_status = status;
if (result == L2CAP_CONN_PENDING) {
l2c_csm_execute (p_ccb, L2CEVT_L2CA_CONNECT_RSP, &conn_info);
} else {
l2c_csm_execute (p_ccb, L2CEVT_L2CA_CONNECT_RSP_NEG, &conn_info);
}
}
return (TRUE);
}
/*******************************************************************************
**
** Function L2CA_ConfigReq
**
** Description Higher layers call this function to send configuration.
**
** Note: The FCR options of p_cfg are not used.
**
** Returns TRUE if configuration sent, else FALSE
**
*******************************************************************************/
BOOLEAN L2CA_ConfigReq (UINT16 cid, tL2CAP_CFG_INFO *p_cfg)
{
tL2C_CCB *p_ccb;
//counter_add("l2cap.cfg.req", 1);
L2CAP_TRACE_API ("L2CA_ConfigReq() CID 0x%04x: fcr_present:%d (mode %d) mtu_present:%d (%d)",
cid, p_cfg->fcr_present, p_cfg->fcr.mode, p_cfg->mtu_present, p_cfg->mtu);
/* Find the channel control block. We don't know the link it is on. */
if ((p_ccb = l2cu_find_ccb_by_cid (NULL, cid)) == NULL) {
L2CAP_TRACE_WARNING ("L2CAP - no CCB for L2CA_cfg_req, CID: %d", cid);
return (FALSE);
}
/* We need to have at least one mode type common with the peer */
if (!l2c_fcr_adj_our_req_options(p_ccb, p_cfg)) {
return (FALSE);
}
/* Don't adjust FCR options if not used */
if ((!p_cfg->fcr_present) || (p_cfg->fcr.mode == L2CAP_FCR_BASIC_MODE)) {
/* FCR and FCS options are not used in basic mode */
p_cfg->fcs_present = FALSE;
p_cfg->ext_flow_spec_present = FALSE;
if ( (p_cfg->mtu_present) && (p_cfg->mtu > L2CAP_MTU_SIZE) ) {
L2CAP_TRACE_WARNING ("L2CAP - adjust MTU: %u too large", p_cfg->mtu);
p_cfg->mtu = L2CAP_MTU_SIZE;
}
}
/* Save the adjusted configuration in case it needs to be used for renegotiation */
p_ccb->our_cfg = *p_cfg;
l2c_csm_execute (p_ccb, L2CEVT_L2CA_CONFIG_REQ, p_cfg);
return (TRUE);
}
/*******************************************************************************
**
** Function L2CA_ConfigRsp
**
** Description Higher layers call this function to send a configuration
** response.
**
** Returns TRUE if configuration response sent, else FALSE
**
*******************************************************************************/
BOOLEAN L2CA_ConfigRsp (UINT16 cid, tL2CAP_CFG_INFO *p_cfg)
{
tL2C_CCB *p_ccb;
//counter_add("l2cap.cfg.rsp", 1);
L2CAP_TRACE_API ("L2CA_ConfigRsp() CID: 0x%04x Result: %d MTU present:%d Flush TO:%d FCR:%d FCS:%d",
cid, p_cfg->result, p_cfg->mtu_present, p_cfg->flush_to_present, p_cfg->fcr_present, p_cfg->fcs_present);
/* Find the channel control block. We don't know the link it is on. */
if ((p_ccb = l2cu_find_ccb_by_cid (NULL, cid)) == NULL) {
L2CAP_TRACE_WARNING ("L2CAP - no CCB for L2CA_cfg_rsp, CID: %d", cid);
return (FALSE);
}
if ( (p_cfg->result == L2CAP_CFG_OK) || (p_cfg->result == L2CAP_CFG_PENDING) ) {
l2c_csm_execute (p_ccb, L2CEVT_L2CA_CONFIG_RSP, p_cfg);
} else {
p_cfg->fcr_present = FALSE; /* FCR options already negotiated before this point */
/* Clear out any cached options that are being returned as an error (excluding FCR) */
if (p_cfg->mtu_present) {
p_ccb->peer_cfg.mtu_present = FALSE;
}
if (p_cfg->flush_to_present) {
p_ccb->peer_cfg.flush_to_present = FALSE;
}
if (p_cfg->qos_present) {
p_ccb->peer_cfg.qos_present = FALSE;
}
l2c_csm_execute (p_ccb, L2CEVT_L2CA_CONFIG_RSP_NEG, p_cfg);
}
return (TRUE);
}
/*******************************************************************************
**
** Function L2CA_DisconnectReq
**
** Description Higher layers call this function to disconnect a channel.
**
** Returns TRUE if disconnect sent, else FALSE
**
*******************************************************************************/
BOOLEAN L2CA_DisconnectReq (UINT16 cid)
{
tL2C_CCB *p_ccb;
//counter_add("l2cap.disconn.req", 1);
L2CAP_TRACE_API ("L2CA_DisconnectReq() CID: 0x%04x", cid);
/* Find the channel control block. We don't know the link it is on. */
if ((p_ccb = l2cu_find_ccb_by_cid (NULL, cid)) == NULL) {
L2CAP_TRACE_WARNING ("L2CAP - no CCB for L2CA_disc_req, CID: %d", cid);
return (FALSE);
}
l2c_csm_execute (p_ccb, L2CEVT_L2CA_DISCONNECT_REQ, NULL);
return (TRUE);
}
/*******************************************************************************
**
** Function L2CA_DisconnectRsp
**
** Description Higher layers call this function to acknowledge the
** disconnection of a channel.
**
** Returns void
**
*******************************************************************************/
BOOLEAN L2CA_DisconnectRsp (UINT16 cid)
{
tL2C_CCB *p_ccb;
//counter_add("l2cap.disconn.rsp", 1);
L2CAP_TRACE_API ("L2CA_DisconnectRsp() CID: 0x%04x", cid);
/* Find the channel control block. We don't know the link it is on. */
if ((p_ccb = l2cu_find_ccb_by_cid (NULL, cid)) == NULL) {
L2CAP_TRACE_WARNING ("L2CAP - no CCB for L2CA_disc_rsp, CID: %d", cid);
return (FALSE);
}
l2c_csm_execute (p_ccb, L2CEVT_L2CA_DISCONNECT_RSP, NULL);
return (TRUE);
}
/*******************************************************************************
**
** Function L2CA_Ping
**
** Description Higher layers call this function to send an echo request.
**
** Returns TRUE if echo request sent, else FALSE.
**
*******************************************************************************/
BOOLEAN L2CA_Ping (BD_ADDR p_bd_addr, tL2CA_ECHO_RSP_CB *p_callback)
{
tL2C_LCB *p_lcb;
L2CAP_TRACE_API ("L2CA_Ping() BDA: %02x-%02x-%02x-%02x-%02x-%02x",
p_bd_addr[0], p_bd_addr[1], p_bd_addr[2], p_bd_addr[3], p_bd_addr[4], p_bd_addr[5]);
/* Fail if we have not established communications with the controller */
if (!BTM_IsDeviceUp()) {
return (FALSE);
}
/* First, see if we already have a link to the remote */
if ((p_lcb = l2cu_find_lcb_by_bd_addr (p_bd_addr, BT_TRANSPORT_BR_EDR)) == NULL) {
/* No link. Get an LCB and start link establishment */
if ((p_lcb = l2cu_allocate_lcb (p_bd_addr, FALSE, BT_TRANSPORT_BR_EDR)) == NULL) {
L2CAP_TRACE_WARNING ("L2CAP - no LCB for L2CA_ping");
return (FALSE);
}
if (l2cu_create_conn(p_lcb, BT_TRANSPORT_BR_EDR) == FALSE) {
return (FALSE);
}
p_lcb->p_echo_rsp_cb = p_callback;
return (TRUE);
}
/* We only allow 1 ping outstanding at a time */
if (p_lcb->p_echo_rsp_cb != NULL) {
L2CAP_TRACE_WARNING ("L2CAP - rejected second L2CA_ping");
return (FALSE);
}
/* Have a link control block. If link is disconnecting, tell user to retry later */
if (p_lcb->link_state == LST_DISCONNECTING) {
L2CAP_TRACE_WARNING ("L2CAP - L2CA_ping rejected - link disconnecting");
return (FALSE);
}
/* Save address of callback */
p_lcb->p_echo_rsp_cb = p_callback;
if (p_lcb->link_state == LST_CONNECTED) {
l2cu_adj_id(p_lcb, L2CAP_ADJ_BRCM_ID); /* Make sure not using Broadcom ID */
l2cu_send_peer_echo_req (p_lcb, NULL, 0);
btu_start_timer (&p_lcb->timer_entry, BTU_TTYPE_L2CAP_LINK, L2CAP_ECHO_RSP_TOUT);
}
return (TRUE);
}
/*******************************************************************************
**
** Function L2CA_Echo
**
** Description Higher layers call this function to send an echo request
** with application-specific data.
**
** Returns TRUE if echo request sent, else FALSE.
**
*******************************************************************************/
BOOLEAN L2CA_Echo (BD_ADDR p_bd_addr, BT_HDR *p_data, tL2CA_ECHO_DATA_CB *p_callback)
{
tL2C_LCB *p_lcb;
UINT8 *pp;
L2CAP_TRACE_API ("L2CA_Echo() BDA: %08X%04X",
((p_bd_addr[0] << 24) + (p_bd_addr[1] << 16) + (p_bd_addr[2] << 8) + (p_bd_addr[3])),
((p_bd_addr[4] << 8) + (p_bd_addr[5])));
/* Fail if we have not established communications with the controller */
if (!BTM_IsDeviceUp()) {
return (FALSE);
}
if ((memcmp(BT_BD_ANY, p_bd_addr, BD_ADDR_LEN) == 0) && (p_data == NULL)) {
/* Only register callback without sending message. */
l2cb.p_echo_data_cb = p_callback;
return TRUE;
}
/* We assume the upper layer will call this function only when the link is established. */
if ((p_lcb = l2cu_find_lcb_by_bd_addr (p_bd_addr, BT_TRANSPORT_BR_EDR)) == NULL) {
L2CAP_TRACE_ERROR ("L2CA_Echo ERROR : link not established");
return FALSE;
}
if (p_lcb->link_state != LST_CONNECTED) {
L2CAP_TRACE_ERROR ("L2CA_Echo ERROR : link is not connected");
return FALSE;
}
/* Save address of callback */
l2cb.p_echo_data_cb = p_callback;
/* Set the pointer to the beginning of the data */
pp = (UINT8 *)(p_data + 1) + p_data->offset;
l2cu_adj_id(p_lcb, L2CAP_ADJ_BRCM_ID); /* Make sure not using Broadcom ID */
l2cu_send_peer_echo_req (p_lcb, pp, p_data->len);
return (TRUE);
}
#endif ///CLASSIC_BT_INCLUDED == TRUE
bool L2CA_GetIdentifiers(uint16_t lcid, uint16_t *rcid, uint16_t *handle)
{
tL2C_CCB *control_block = l2cu_find_ccb_by_cid(NULL, lcid);
if (!control_block) {
return false;
}
if (rcid) {
*rcid = control_block->remote_cid;
}
if (handle) {
*handle = control_block->p_lcb->handle;
}
return true;
}
/*******************************************************************************
**
** Function L2CA_SetIdleTimeout
**
** Description Higher layers call this function to set the idle timeout for
** a connection, or for all future connections. The "idle timeout"
** is the amount of time that a connection can remain up with
** no L2CAP channels on it. A timeout of zero means that the
** connection will be torn down immediately when the last channel
** is removed. A timeout of 0xFFFF means no timeout. Values are
** in seconds.
**
** Returns TRUE if command succeeded, FALSE if failed
**
** NOTE This timeout takes effect after at least 1 channel has been
** established and removed. L2CAP maintains its own timer from
** whan a connection is established till the first channel is
** set up.
*******************************************************************************/
BOOLEAN L2CA_SetIdleTimeout (UINT16 cid, UINT16 timeout, BOOLEAN is_global)
{
tL2C_CCB *p_ccb;
tL2C_LCB *p_lcb;
if (is_global) {
l2cb.idle_timeout = timeout;
} else {
/* Find the channel control block. We don't know the link it is on. */
if ((p_ccb = l2cu_find_ccb_by_cid (NULL, cid)) == NULL) {
L2CAP_TRACE_WARNING ("L2CAP - no CCB for L2CA_SetIdleTimeout, CID: %d", cid);
return (FALSE);
}
p_lcb = p_ccb->p_lcb;
if ((p_lcb) && (p_lcb->in_use) && (p_lcb->link_state == LST_CONNECTED)) {
p_lcb->idle_timeout = timeout;
} else {
return (FALSE);
}
}
return (TRUE);
}
/*******************************************************************************
**
** Function L2CA_SetIdleTimeoutByBdAddr
**
** Description Higher layers call this function to set the idle timeout for
** a connection. The "idle timeout" is the amount of time that
** a connection can remain up with no L2CAP channels on it.
** A timeout of zero means that the connection will be torn
** down immediately when the last channel is removed.
** A timeout of 0xFFFF means no timeout. Values are in seconds.
** A bd_addr is the remote BD address. If bd_addr = BT_BD_ANY,
** then the idle timeouts for all active l2cap links will be
** changed.
**
** Returns TRUE if command succeeded, FALSE if failed
**
** NOTE This timeout applies to all logical channels active on the
** ACL link.
*******************************************************************************/
BOOLEAN L2CA_SetIdleTimeoutByBdAddr(BD_ADDR bd_addr, UINT16 timeout, tBT_TRANSPORT transport)
{
tL2C_LCB *p_lcb;
list_node_t *p_node = NULL;
if (memcmp (BT_BD_ANY, bd_addr, BD_ADDR_LEN)) {
p_lcb = l2cu_find_lcb_by_bd_addr( bd_addr, transport);
if ((p_lcb) && (p_lcb->in_use) && (p_lcb->link_state == LST_CONNECTED)) {
p_lcb->idle_timeout = timeout;
if (!p_lcb->ccb_queue.p_first_ccb) {
l2cu_no_dynamic_ccbs (p_lcb);
}
} else {
return FALSE;
}
} else {
for (p_node = list_begin(l2cb.p_lcb_pool); p_node; p_node = list_next(p_node)) {
p_lcb = list_node(p_node);
if ((p_lcb->in_use) && (p_lcb->link_state == LST_CONNECTED)) {
p_lcb->idle_timeout = timeout;
if (!p_lcb->ccb_queue.p_first_ccb) {
l2cu_no_dynamic_ccbs (p_lcb);
}
}
}
}
return TRUE;
}
/*******************************************************************************
**
** Function L2CA_SetTraceLevel
**
** Description This function sets the trace level for L2CAP. If called with
** a value of 0xFF, it simply reads the current trace level.
**
** Returns the new (current) trace level
**
*******************************************************************************/
UINT8 L2CA_SetTraceLevel (UINT8 new_level)
{
if (new_level != 0xFF) {
l2cb.l2cap_trace_level = new_level;
}
return (l2cb.l2cap_trace_level);
}
/*******************************************************************************
**
** Function L2CA_SetDesireRole
**
** Description This function sets the desire role for L2CAP.
** If the new role is L2CAP_ROLE_ALLOW_SWITCH, allow switch on
** HciCreateConnection.
** If the new role is L2CAP_ROLE_DISALLOW_SWITCH, do not allow switch on
** HciCreateConnection.
**
** If the new role is a valid role (HCI_ROLE_MASTER or HCI_ROLE_SLAVE),
** the desire role is set to the new value. Otherwise, it is not changed.
**
** Returns the new (current) role
**
*******************************************************************************/
UINT8 L2CA_SetDesireRole (UINT8 new_role)
{
L2CAP_TRACE_API ("L2CA_SetDesireRole() new:x%x, disallow_switch:%d",
new_role, l2cb.disallow_switch);
if (L2CAP_ROLE_CHECK_SWITCH != (L2CAP_ROLE_CHECK_SWITCH & new_role)) {
/* do not process the allow_switch when both bits are set */
if (new_role & L2CAP_ROLE_ALLOW_SWITCH) {
l2cb.disallow_switch = FALSE;
}
if (new_role & L2CAP_ROLE_DISALLOW_SWITCH) {
l2cb.disallow_switch = TRUE;
}
}
if (new_role == HCI_ROLE_MASTER || new_role == HCI_ROLE_SLAVE) {
l2cb.desire_role = new_role;
}
return (l2cb.desire_role);
}
#if (CLASSIC_BT_INCLUDED == TRUE)
/*******************************************************************************
**
** Function L2CA_LocalLoopbackReq
**
** Description This function sets up a CID for local loopback
**
** Returns CID of 0 if none.
**
*******************************************************************************/
UINT16 L2CA_LocalLoopbackReq (UINT16 psm, UINT16 handle, BD_ADDR p_bd_addr)
{
tL2C_LCB *p_lcb;
tL2C_CCB *p_ccb;
tL2C_RCB *p_rcb;
L2CAP_TRACE_API ("L2CA_LocalLoopbackReq() PSM: %d Handle: 0x%04x", psm, handle);
/* Fail if we have not established communications with the controller */
if (!BTM_IsDeviceUp()) {
L2CAP_TRACE_WARNING ("L2CAP loop req - BTU not ready");
return (0);
}
/* Fail if the PSM is not registered */
if ((p_rcb = l2cu_find_rcb_by_psm (psm)) == NULL) {
L2CAP_TRACE_WARNING ("L2CAP - no RCB for L2CA_conn_req, PSM: %d", psm);
return (0);
}
if ((p_lcb = l2cu_allocate_lcb (p_bd_addr, FALSE, BT_TRANSPORT_BR_EDR)) == NULL) {
L2CAP_TRACE_WARNING ("L2CAP - no LCB for L2CA_conn_req");
return (0);
}
p_lcb->link_state = LST_CONNECTED;
p_lcb->handle = handle;
/* Allocate a channel control block */
if ((p_ccb = l2cu_allocate_ccb (p_lcb, 0)) == NULL) {
L2CAP_TRACE_WARNING ("L2CAP - no CCB for L2CA_conn_req");
return (0);
}
/* Save registration info */
p_ccb->p_rcb = p_rcb;
p_ccb->chnl_state = CST_OPEN;
p_ccb->remote_cid = p_ccb->local_cid;
p_ccb->config_done = CFG_DONE_MASK;
/* Return the local CID as our handle */
return (p_ccb->local_cid);
}
/*******************************************************************************
**
** Function L2CA_SetAclPriority
**
** Description Sets the transmission priority for a channel.
** (For initial implementation only two values are valid.
** L2CAP_PRIORITY_NORMAL and L2CAP_PRIORITY_HIGH).
**
** Returns TRUE if a valid channel, else FALSE
**
*******************************************************************************/
BOOLEAN L2CA_SetAclPriority (BD_ADDR bd_addr, UINT8 priority)
{
L2CAP_TRACE_API ("L2CA_SetAclPriority() bdaddr: %02x%02x%02x%02x%04x, priority:%d",
bd_addr[0], bd_addr[1], bd_addr[2],
bd_addr[3], (bd_addr[4] << 8) + bd_addr[5], priority);
return (l2cu_set_acl_priority(bd_addr, priority, FALSE));
}
/*******************************************************************************
**
** Function L2CA_FlowControl
**
** Description Higher layers call this function to flow control a channel.
**
** data_enabled - TRUE data flows, FALSE data is stopped
**
** Returns TRUE if valid channel, else FALSE
**
*******************************************************************************/
BOOLEAN L2CA_FlowControl (UINT16 cid, BOOLEAN data_enabled)
{
tL2C_CCB *p_ccb;
BOOLEAN on_off = !data_enabled;
L2CAP_TRACE_API ("L2CA_FlowControl(%d) CID: 0x%04x", on_off, cid);
/* Find the channel control block. We don't know the link it is on. */
if ((p_ccb = l2cu_find_ccb_by_cid (NULL, cid)) == NULL) {
L2CAP_TRACE_WARNING ("L2CAP - no CCB for L2CA_FlowControl, CID: 0x%04x data_enabled: %d", cid, data_enabled);
return (FALSE);
}
if (p_ccb->peer_cfg.fcr.mode != L2CAP_FCR_ERTM_MODE) {
L2CAP_TRACE_EVENT ("L2CA_FlowControl() invalid mode:%d", p_ccb->peer_cfg.fcr.mode);
return (FALSE);
}
if (p_ccb->fcrb.local_busy != on_off) {
p_ccb->fcrb.local_busy = on_off;
if ( (p_ccb->chnl_state == CST_OPEN) && (!p_ccb->fcrb.wait_ack) ) {
if (on_off) {
l2c_fcr_send_S_frame (p_ccb, L2CAP_FCR_SUP_RNR, 0);
} else {
l2c_fcr_send_S_frame (p_ccb, L2CAP_FCR_SUP_RR, L2CAP_FCR_P_BIT);
}
}
}
return (TRUE);
}
/*******************************************************************************
**
** Function L2CA_SendTestSFrame
**
** Description Higher layers call this function to send a test S-frame.
**
** Returns TRUE if valid Channel, else FALSE
**
*******************************************************************************/
BOOLEAN L2CA_SendTestSFrame (UINT16 cid, UINT8 sup_type, UINT8 back_track)
{
tL2C_CCB *p_ccb;
L2CAP_TRACE_API ("L2CA_SendTestSFrame() CID: 0x%04x Type: 0x%02x back_track: %u", cid, sup_type, back_track);
/* Find the channel control block. We don't know the link it is on. */
if ((p_ccb = l2cu_find_ccb_by_cid (NULL, cid)) == NULL) {
L2CAP_TRACE_WARNING ("L2CAP - no CCB for L2CA_SendTestSFrame, CID: %d", cid);
return (FALSE);
}
if ( (p_ccb->chnl_state != CST_OPEN) || (p_ccb->peer_cfg.fcr.mode != L2CAP_FCR_ERTM_MODE) ) {
return (FALSE);
}
p_ccb->fcrb.next_seq_expected -= back_track;
l2c_fcr_send_S_frame (p_ccb, (UINT16)(sup_type & 3), (UINT16)(sup_type & (L2CAP_FCR_P_BIT | L2CAP_FCR_F_BIT)));
return (TRUE);
}
/*******************************************************************************
**
** Function L2CA_SetTxPriority
**
** Description Sets the transmission priority for a channel.
**
** Returns TRUE if a valid channel, else FALSE
**
*******************************************************************************/
BOOLEAN L2CA_SetTxPriority (UINT16 cid, tL2CAP_CHNL_PRIORITY priority)
{
tL2C_CCB *p_ccb;
L2CAP_TRACE_API ("L2CA_SetTxPriority() CID: 0x%04x, priority:%d", cid, priority);
/* Find the channel control block. We don't know the link it is on. */
if ((p_ccb = l2cu_find_ccb_by_cid (NULL, cid)) == NULL) {
L2CAP_TRACE_WARNING ("L2CAP - no CCB for L2CA_SetTxPriority, CID: %d", cid);
return (FALSE);
}
/* it will update the order of CCB in LCB by priority and update round robin service variables */
l2cu_change_pri_ccb (p_ccb, priority);
return (TRUE);
}
/*******************************************************************************
**
** Function L2CA_SetChnlDataRate
**
** Description Sets the tx/rx data rate for a channel.
**
** Returns TRUE if a valid channel, else FALSE
**
*******************************************************************************/
BOOLEAN L2CA_SetChnlDataRate (UINT16 cid, tL2CAP_CHNL_DATA_RATE tx, tL2CAP_CHNL_DATA_RATE rx)
{
tL2C_CCB *p_ccb;
L2CAP_TRACE_API ("L2CA_SetChnlDataRate() CID: 0x%04x, tx:%d, rx:%d", cid, tx, rx);
/* Find the channel control block. We don't know the link it is on. */
if ((p_ccb = l2cu_find_ccb_by_cid (NULL, cid)) == NULL) {
L2CAP_TRACE_WARNING ("L2CAP - no CCB for L2CA_SetChnlDataRate, CID: %d", cid);
return (FALSE);
}
p_ccb->tx_data_rate = tx;
p_ccb->rx_data_rate = rx;
/* Adjust channel buffer allocation */
l2c_link_adjust_chnl_allocation ();
return (TRUE);
}
/*******************************************************************************
**
** Function L2CA_SetFlushTimeout
**
** Description This function set the automatic flush time out in Baseband
** for ACL-U packets.
** BdAddr : the remote BD address of ACL link. If it is BT_DB_ANY
** then the flush time out will be applied to all ACL link.
** FlushTimeout: flush time out in ms
** 0x0000 : No automatic flush
** L2CAP_NO_RETRANSMISSION : No retransmission
** 0x0002 - 0xFFFE : flush time out, if (flush_tout*8)+3/5)
** <= HCI_MAX_AUTO_FLUSH_TOUT (in 625us slot).
** Otherwise, return FALSE.
** L2CAP_NO_AUTOMATIC_FLUSH : No automatic flush
**
** Returns TRUE if command succeeded, FALSE if failed
**
** NOTE This flush timeout applies to all logical channels active on the
** ACL link.
*******************************************************************************/
BOOLEAN L2CA_SetFlushTimeout (BD_ADDR bd_addr, UINT16 flush_tout)
{
tL2C_LCB *p_lcb;
UINT16 hci_flush_to;
UINT32 temp;
/* no automatic flush (infinite timeout) */
if (flush_tout == 0x0000) {
hci_flush_to = flush_tout;
flush_tout = L2CAP_NO_AUTOMATIC_FLUSH;
}
/* no retransmission */
else if (flush_tout == L2CAP_NO_RETRANSMISSION) {
/* not mandatory range for controller */
/* Packet is flushed before getting any ACK/NACK */
/* To do this, flush timeout should be 1 baseband slot */
hci_flush_to = flush_tout;
}
/* no automatic flush (infinite timeout) */
else if (flush_tout == L2CAP_NO_AUTOMATIC_FLUSH) {
hci_flush_to = 0x0000;
} else {
/* convert L2CAP flush_to to 0.625 ms units, with round */
temp = (((UINT32)flush_tout * 8) + 3) / 5;
/* if L2CAP flush_to within range of HCI, set HCI flush timeout */
if (temp > HCI_MAX_AUTO_FLUSH_TOUT) {
L2CAP_TRACE_WARNING("WARNING L2CA_SetFlushTimeout timeout(0x%x) is out of range", flush_tout);
return FALSE;
} else {
hci_flush_to = (UINT16)temp;
}
}
if (memcmp (BT_BD_ANY, bd_addr, BD_ADDR_LEN)) {
p_lcb = l2cu_find_lcb_by_bd_addr (bd_addr, BT_TRANSPORT_BR_EDR);
if ((p_lcb) && (p_lcb->in_use) && (p_lcb->link_state == LST_CONNECTED)) {
if (p_lcb->link_flush_tout != flush_tout) {
p_lcb->link_flush_tout = flush_tout;
L2CAP_TRACE_API ("L2CA_SetFlushTimeout 0x%04x ms for bd_addr [...;%02x%02x%02x]",
flush_tout, bd_addr[3], bd_addr[4], bd_addr[5]);
if (!btsnd_hcic_write_auto_flush_tout (p_lcb->handle, hci_flush_to)) {
return (FALSE);
}
}
} else {
L2CAP_TRACE_WARNING ("WARNING L2CA_SetFlushTimeout No lcb for bd_addr [...;%02x%02x%02x]",
bd_addr[3], bd_addr[4], bd_addr[5]);
return (FALSE);
}
} else {
list_node_t *p_node = NULL;
for (p_node = list_begin(l2cb.p_lcb_pool); p_node; p_node = list_next(p_node)) {
p_lcb = list_node(p_node);
if ((p_lcb->in_use) && (p_lcb->link_state == LST_CONNECTED)) {
if (p_lcb->link_flush_tout != flush_tout) {
p_lcb->link_flush_tout = flush_tout;
L2CAP_TRACE_API ("L2CA_SetFlushTimeout 0x%04x ms for bd_addr [...;%02x%02x%02x]",
flush_tout, p_lcb->remote_bd_addr[3],
p_lcb->remote_bd_addr[4], p_lcb->remote_bd_addr[5]);
if (!btsnd_hcic_write_auto_flush_tout(p_lcb->handle, hci_flush_to)) {
return (FALSE);
}
}
}
}
}
return (TRUE);
}
#endif ///CLASSIC_BT_INCLUDED == TRUE
/*******************************************************************************
**
** Function L2CA_GetPeerFeatures
**
** Description Get a peers features and fixed channel map
**
** Parameters: BD address of the peer
** Pointers to features and channel mask storage area
**
** Return value: TRUE if peer is connected
**
*******************************************************************************/
BOOLEAN L2CA_GetPeerFeatures (BD_ADDR bd_addr, UINT32 *p_ext_feat, UINT8 *p_chnl_mask)
{
tL2C_LCB *p_lcb;
/* We must already have a link to the remote */
if ((p_lcb = l2cu_find_lcb_by_bd_addr (bd_addr, BT_TRANSPORT_BR_EDR)) == NULL) {
L2CAP_TRACE_WARNING ("L2CA_GetPeerFeatures() No BDA: %08x%04x",
(bd_addr[0] << 24) + (bd_addr[1] << 16) + (bd_addr[2] << 8) + bd_addr[3],
(bd_addr[4] << 8) + bd_addr[5]);
return (FALSE);
}
L2CAP_TRACE_API ("L2CA_GetPeerFeatures() BDA: %08x%04x ExtFea: 0x%08x Chnl_Mask[0]: 0x%02x",
(bd_addr[0] << 24) + (bd_addr[1] << 16) + (bd_addr[2] << 8) + bd_addr[3],
(bd_addr[4] << 8) + bd_addr[5], p_lcb->peer_ext_fea, p_lcb->peer_chnl_mask[0]);
*p_ext_feat = p_lcb->peer_ext_fea;
memcpy (p_chnl_mask, p_lcb->peer_chnl_mask, L2CAP_FIXED_CHNL_ARRAY_SIZE);
return (TRUE);
}
/*******************************************************************************
**
** Function L2CA_GetBDAddrbyHandle
**
** Description Get BD address for the given HCI handle
**
** Parameters: HCI handle
** BD address of the peer
**
** Return value: TRUE if found lcb for the given handle, FALSE otherwise
**
*******************************************************************************/
BOOLEAN L2CA_GetBDAddrbyHandle (UINT16 handle, BD_ADDR bd_addr)
{
tL2C_LCB *p_lcb = NULL;
BOOLEAN found_dev = FALSE;
p_lcb = l2cu_find_lcb_by_handle (handle);
if (p_lcb) {
found_dev = TRUE;
memcpy (bd_addr, p_lcb->remote_bd_addr, BD_ADDR_LEN);
}
return found_dev;
}
#if (CLASSIC_BT_INCLUDED == TRUE)
/*******************************************************************************
**
** Function L2CA_GetChnlFcrMode
**
** Description Get the channel FCR mode
**
** Parameters: Local CID
**
** Return value: Channel mode
**
*******************************************************************************/
UINT8 L2CA_GetChnlFcrMode (UINT16 lcid)
{
tL2C_CCB *p_ccb = l2cu_find_ccb_by_cid (NULL, lcid);
if (p_ccb) {
L2CAP_TRACE_API ("L2CA_GetChnlFcrMode() returns mode %d", p_ccb->peer_cfg.fcr.mode);
return (p_ccb->peer_cfg.fcr.mode);
}
L2CAP_TRACE_API ("L2CA_GetChnlFcrMode() returns mode L2CAP_FCR_BASIC_MODE");
return (L2CAP_FCR_BASIC_MODE);
}
#endif ///CLASSIC_BT_INCLUDED == TRUE
#if (BLE_INCLUDED == TRUE)
/*******************************************************************************
**
** Function L2CA_RegisterLECoc
**
** Description Other layers call this function to register for L2CAP
** Connection Oriented Channel.
**
** Returns PSM to use or zero if error. Typically, the PSM returned
** is the same as was passed in, but for an outgoing-only
** connection to a dynamic PSM, a "virtual" PSM is returned
** and should be used in the calls to L2CA_ConnectLECocReq()
** and L2CA_DeregisterLECoc()
**
*******************************************************************************/
UINT16 L2CA_RegisterLECoc(UINT16 psm, tL2CAP_APPL_INFO *p_cb_info)
{
L2CAP_TRACE_API("%s called for LE PSM: 0x%04x", __func__, psm);
/* Verify that the required callback info has been filled in
** Note: Connection callbacks are required but not checked
** for here because it is possible to be only a client
** or only a server.
*/
if ((!p_cb_info->pL2CA_DataInd_Cb)
|| (!p_cb_info->pL2CA_DisconnectInd_Cb))
{
L2CAP_TRACE_ERROR("%s No cb registering BLE PSM: 0x%04x", __func__, psm);
return 0;
}
/* Verify PSM is valid */
if (!L2C_IS_VALID_LE_PSM(psm))
{
L2CAP_TRACE_ERROR("%s Invalid BLE PSM value, PSM: 0x%04x", __func__, psm);
return 0;
}
tL2C_RCB *p_rcb;
UINT16 vpsm = psm;
/* Check if this is a registration for an outgoing-only connection to */
/* a dynamic PSM. If so, allocate a "virtual" PSM for the app to use. */
if ((psm >= 0x0080) && (p_cb_info->pL2CA_ConnectInd_Cb == NULL))
{
for (vpsm = 0x0080; vpsm < 0x0100; vpsm++)
{
p_rcb = l2cu_find_ble_rcb_by_psm(vpsm);
if (p_rcb == NULL) {
break;
}
}
L2CAP_TRACE_API("%s Real PSM: 0x%04x Virtual PSM: 0x%04x", __func__, psm, vpsm);
}
/* If registration block already there, just overwrite it */
p_rcb = l2cu_find_ble_rcb_by_psm(vpsm);
if (p_rcb == NULL)
{
p_rcb = l2cu_allocate_ble_rcb(vpsm);
if (p_rcb == NULL)
{
L2CAP_TRACE_WARNING("%s No BLE RCB available, PSM: 0x%04x vPSM: 0x%04x",
__func__, psm, vpsm);
return 0;
}
}
p_rcb->api = *p_cb_info;
p_rcb->real_psm = psm;
return vpsm;
}
/*******************************************************************************
**
** Function L2CA_DeregisterLECoc
**
** Description Other layers call this function to de-register for L2CAP
** Connection Oriented Channel.
**
** Returns void
**
*******************************************************************************/
void L2CA_DeregisterLECoc(UINT16 psm)
{
L2CAP_TRACE_API("%s called for PSM: 0x%04x", __func__, psm);
tL2C_RCB *p_rcb = l2cu_find_ble_rcb_by_psm(psm);
if (p_rcb == NULL)
{
L2CAP_TRACE_WARNING("%s PSM: 0x%04x not found for deregistration", __func__, psm);
return;
}
tL2C_LCB *p_lcb = NULL;
list_node_t *p_node = NULL;
for (p_node = list_begin(l2cb.p_lcb_pool); p_node; p_node = list_next(p_node)) {
p_lcb = list_node(p_node);
if (!p_lcb->in_use || p_lcb->transport != BT_TRANSPORT_LE) {
continue;
}
tL2C_CCB *p_ccb = p_lcb->ccb_queue.p_first_ccb;
if ((p_ccb == NULL) || (p_lcb->link_state == LST_DISCONNECTING)) {
continue;
}
if (p_ccb->in_use &&
(p_ccb->chnl_state == CST_W4_L2CAP_DISCONNECT_RSP ||
p_ccb->chnl_state == CST_W4_L2CA_DISCONNECT_RSP)) {
continue;
}
if (p_ccb->p_rcb == p_rcb) {
l2c_csm_execute(p_ccb, L2CEVT_L2CA_DISCONNECT_REQ, NULL);
}
}
l2cu_release_rcb (p_rcb);
}
/*******************************************************************************
**
** Function L2CA_ConnectLECocReq
**
** Description Higher layers call this function to create an L2CAP connection.
** Note that the connection is not established at this time, but
** connection establishment gets started. The callback function
** will be invoked when connection establishes or fails.
**
** Parameters: PSM: L2CAP PSM for the connection
** BD address of the peer
** Local Coc configurations
** Returns the CID of the connection, or 0 if it failed to start
**
*******************************************************************************/
UINT16 L2CA_ConnectLECocReq(UINT16 psm, BD_ADDR p_bd_addr, tL2CAP_LE_CFG_INFO *p_cfg)
{
L2CAP_TRACE_API("%s PSM: 0x%04x BDA: %02x:%02x:%02x:%02x:%02x:%02x", __func__, psm,
p_bd_addr[0], p_bd_addr[1], p_bd_addr[2], p_bd_addr[3], p_bd_addr[4], p_bd_addr[5]);
/* Fail if we have not established communications with the controller */
if (!BTM_IsDeviceUp())
{
L2CAP_TRACE_WARNING("%s BTU not ready", __func__);
return 0;
}
/* Fail if the PSM is not registered */
tL2C_RCB *p_rcb = l2cu_find_ble_rcb_by_psm(psm);
if (p_rcb == NULL)
{
L2CAP_TRACE_WARNING("%s No BLE RCB, PSM: 0x%04x", __func__, psm);
return 0;
}
/* First, see if we already have a le link to the remote */
tL2C_LCB *p_lcb = l2cu_find_lcb_by_bd_addr(p_bd_addr, BT_TRANSPORT_LE);
if (p_lcb == NULL)
{
/* No link. Get an LCB and start link establishment */
p_lcb = l2cu_allocate_lcb(p_bd_addr, FALSE, BT_TRANSPORT_LE);
if ((p_lcb == NULL)
/* currently use BR/EDR for ERTM mode l2cap connection */
|| (l2cu_create_conn(p_lcb, BT_TRANSPORT_LE) == FALSE) )
{
L2CAP_TRACE_WARNING("%s conn not started for PSM: 0x%04x p_lcb: 0x%p",
__func__, psm, p_lcb);
return 0;
}
}
/* Allocate a channel control block */
tL2C_CCB *p_ccb = l2cu_allocate_ccb(p_lcb, 0);
if (p_ccb == NULL)
{
L2CAP_TRACE_WARNING("%s no CCB, PSM: 0x%04x", __func__, psm);
return 0;
}
/* Save registration info */
p_ccb->p_rcb = p_rcb;
/* Save the configuration */
if (p_cfg) {
memcpy(&p_ccb->local_conn_cfg, p_cfg, sizeof(tL2CAP_LE_CFG_INFO));
}
/* If link is up, start the L2CAP connection */
if (p_lcb->link_state == LST_CONNECTED)
{
if (p_ccb->p_lcb->transport == BT_TRANSPORT_LE)
{
L2CAP_TRACE_DEBUG("%s LE Link is up", __func__);
l2c_csm_execute(p_ccb, L2CEVT_L2CA_CONNECT_REQ, NULL);
}
}
/* If link is disconnecting, save link info to retry after disconnect
* Possible Race condition when a reconnect occurs
* on the channel during a disconnect of link. This
* ccb will be automatically retried after link disconnect
* arrives
*/
else if (p_lcb->link_state == LST_DISCONNECTING)
{
L2CAP_TRACE_DEBUG("%s link disconnecting: RETRY LATER", __func__);
/* Save ccb so it can be started after disconnect is finished */
p_lcb->p_pending_ccb = p_ccb;
}
L2CAP_TRACE_API("%s(psm: 0x%04x) returned CID: 0x%04x", __func__, psm, p_ccb->local_cid);
/* Return the local CID as our handle */
return p_ccb->local_cid;
}
/*******************************************************************************
**
** Function L2CA_ConnectLECocRsp
**
** Description Higher layers call this function to accept an incoming
** L2CAP COC connection, for which they had gotten an connect
** indication callback.
**
** Returns TRUE for success, FALSE for failure
**
*******************************************************************************/
BOOLEAN L2CA_ConnectLECocRsp (BD_ADDR p_bd_addr, UINT8 id, UINT16 lcid, UINT16 result,
UINT16 status, tL2CAP_LE_CFG_INFO *p_cfg)
{
L2CAP_TRACE_API("%s CID: 0x%04x Result: %d Status: %d BDA: %02x:%02x:%02x:%02x:%02x:%02x",
__func__, lcid, result, status,
p_bd_addr[0], p_bd_addr[1], p_bd_addr[2], p_bd_addr[3], p_bd_addr[4], p_bd_addr[5]);
/* First, find the link control block */
tL2C_LCB *p_lcb = l2cu_find_lcb_by_bd_addr(p_bd_addr, BT_TRANSPORT_LE);
if (p_lcb == NULL)
{
/* No link. Get an LCB and start link establishment */
L2CAP_TRACE_WARNING("%s no LCB", __func__);
return FALSE;
}
/* Now, find the channel control block */
tL2C_CCB *p_ccb = l2cu_find_ccb_by_cid(p_lcb, lcid);
if (p_ccb == NULL)
{
L2CAP_TRACE_WARNING("%s no CCB", __func__);
return FALSE;
}
/* The IDs must match */
if (p_ccb->remote_id != id)
{
L2CAP_TRACE_WARNING("%s bad id. Expected: %d Got: %d", __func__, p_ccb->remote_id, id);
return FALSE;
}
if (p_cfg) {
memcpy(&p_ccb->local_conn_cfg, p_cfg, sizeof(tL2CAP_LE_CFG_INFO));
}
if (result == L2CAP_CONN_OK)
l2c_csm_execute (p_ccb, L2CEVT_L2CA_CONNECT_RSP, NULL);
else
{
tL2C_CONN_INFO conn_info;
memcpy(conn_info.bd_addr, p_bd_addr, BD_ADDR_LEN);
conn_info.l2cap_result = result;
conn_info.l2cap_status = status;
l2c_csm_execute(p_ccb, L2CEVT_L2CA_CONNECT_RSP_NEG, &conn_info);
}
return TRUE;
}
/*******************************************************************************
**
** Function L2CA_GetPeerLECocConfig
**
** Description Get a peers configuration for LE Connection Oriented Channel.
**
** Parameters: local channel id
** Pointers to peers configuration storage area
**
** Return value: TRUE if peer is connected
**
*******************************************************************************/
BOOLEAN L2CA_GetPeerLECocConfig (UINT16 lcid, tL2CAP_LE_CFG_INFO* peer_cfg)
{
L2CAP_TRACE_API ("%s CID: 0x%04x", __func__, lcid);
tL2C_CCB *p_ccb = l2cu_find_ccb_by_cid(NULL, lcid);
if (p_ccb == NULL)
{
L2CAP_TRACE_ERROR("%s No CCB for CID:0x%04x", __func__, lcid);
return FALSE;
}
if (peer_cfg != NULL) {
memcpy(peer_cfg, &p_ccb->peer_conn_cfg, sizeof(tL2CAP_LE_CFG_INFO));
}
return TRUE;
}
#endif ///BLE_INCLUDED == TRUE
#if (L2CAP_NUM_FIXED_CHNLS > 0)
/*******************************************************************************
**
** Function L2CA_RegisterFixedChannel
**
** Description Register a fixed channel.
**
** Parameters: Fixed Channel #
** Channel Callbacks and config
**
** Return value: -
**
*******************************************************************************/
BOOLEAN L2CA_RegisterFixedChannel (UINT16 fixed_cid, tL2CAP_FIXED_CHNL_REG *p_freg)
{
L2CAP_TRACE_DEBUG ("L2CA_RegisterFixedChannel() CID: 0x%04x, %p", fixed_cid,p_freg);
if ( (fixed_cid < L2CAP_FIRST_FIXED_CHNL) || (fixed_cid > L2CAP_LAST_FIXED_CHNL) ) {
L2CAP_TRACE_ERROR ("L2CA_RegisterFixedChannel() Invalid CID: 0x%04x", fixed_cid);
return (FALSE);
}
l2cb.fixed_reg[fixed_cid - L2CAP_FIRST_FIXED_CHNL] = *p_freg;
return (TRUE);
}
/*******************************************************************************
**
** Function L2CA_ConnectFixedChnl
**
** Description Connect an fixed signalling channel to a remote device.
**
** Parameters: Fixed CID
** BD Address of remote
** BD Address type
**
** Return value: TRUE if connection started
**
*******************************************************************************/
BOOLEAN L2CA_ConnectFixedChnl (UINT16 fixed_cid, BD_ADDR rem_bda, tBLE_ADDR_TYPE bd_addr_type, BOOLEAN is_aux)
{
tL2C_LCB *p_lcb;
tBT_TRANSPORT transport = BT_TRANSPORT_BR_EDR;
L2CAP_TRACE_API ("%s() CID: 0x%04x BDA: %08x%04x", __func__, fixed_cid,
(rem_bda[0] << 24) + (rem_bda[1] << 16) + (rem_bda[2] << 8) + rem_bda[3], (rem_bda[4] << 8) + rem_bda[5]);
// Check CID is valid and registered
if ( (fixed_cid < L2CAP_FIRST_FIXED_CHNL) || (fixed_cid > L2CAP_LAST_FIXED_CHNL)
|| (l2cb.fixed_reg[fixed_cid - L2CAP_FIRST_FIXED_CHNL].pL2CA_FixedData_Cb == NULL) ) {
L2CAP_TRACE_ERROR ("%s() Invalid CID: 0x%04x", __func__, fixed_cid);
return (FALSE);
}
// Fail if BT is not yet up
if (!BTM_IsDeviceUp()) {
L2CAP_TRACE_WARNING ("%s(0x%04x) - BTU not ready", __func__, fixed_cid);
return (FALSE);
}
#if BLE_INCLUDED == TRUE
if (fixed_cid >= L2CAP_ATT_CID && fixed_cid <= L2CAP_SMP_CID) {
transport = BT_TRANSPORT_LE;
}
#endif
tL2C_BLE_FIXED_CHNLS_MASK peer_channel_mask;
// If we already have a link to the remote, check if it supports that CID
if ((p_lcb = l2cu_find_lcb_by_bd_addr (rem_bda, transport)) != NULL) {
// Fixed channels are mandatory on LE transports so ignore the received
// channel mask and use the locally cached LE channel mask.
#if BLE_INCLUDED == TRUE
if (transport == BT_TRANSPORT_LE) {
peer_channel_mask = l2cb.l2c_ble_fixed_chnls_mask;
} else
#endif
{
peer_channel_mask = p_lcb->peer_chnl_mask[0];
}
// Check for supported channel
if (!(peer_channel_mask & (1 << fixed_cid))) {
L2CAP_TRACE_EVENT ("%s() CID:0x%04x BDA: %08x%04x not supported", __func__,
fixed_cid, (rem_bda[0] << 24) + (rem_bda[1] << 16) + (rem_bda[2] << 8) + rem_bda[3],
(rem_bda[4] << 8) + rem_bda[5]);
return FALSE;
}
// Get a CCB and link the lcb to it
if (!l2cu_initialize_fixed_ccb (p_lcb, fixed_cid,
&l2cb.fixed_reg[fixed_cid - L2CAP_FIRST_FIXED_CHNL].fixed_chnl_opts)) {
L2CAP_TRACE_WARNING ("%s(0x%04x) - LCB but no CCB", __func__, fixed_cid);
return FALSE;
}
// racing with disconnecting, queue the connection request
if (p_lcb->link_state == LST_DISCONNECTING) {
L2CAP_TRACE_DEBUG ("%s() - link disconnecting: RETRY LATER", __func__);
/* Save ccb so it can be started after disconnect is finished */
p_lcb->p_pending_ccb = p_lcb->p_fixed_ccbs[fixed_cid - L2CAP_FIRST_FIXED_CHNL];
return TRUE;
}
(*l2cb.fixed_reg[fixed_cid - L2CAP_FIRST_FIXED_CHNL].pL2CA_FixedConn_Cb)
(fixed_cid, p_lcb->remote_bd_addr, TRUE, 0, transport);
return TRUE;
}
// No link. Get an LCB and start link establishment
if ((p_lcb = l2cu_allocate_lcb (rem_bda, FALSE, transport)) == NULL) {
L2CAP_TRACE_WARNING ("%s(0x%04x) - no LCB", __func__, fixed_cid);
return FALSE;
}
// Get a CCB and link the lcb to it
if (!l2cu_initialize_fixed_ccb (p_lcb, fixed_cid,
&l2cb.fixed_reg[fixed_cid - L2CAP_FIRST_FIXED_CHNL].fixed_chnl_opts)) {
p_lcb->disc_reason = L2CAP_CONN_NO_RESOURCES;
L2CAP_TRACE_WARNING ("%s(0x%04x) - no CCB", __func__, fixed_cid);
l2cu_release_lcb (p_lcb);
return FALSE;
}
#if (BLE_INCLUDED == TRUE)
p_lcb->is_aux = is_aux;
p_lcb->open_addr_type = bd_addr_type;
#endif
if (!l2cu_create_conn(p_lcb, transport)) {
L2CAP_TRACE_WARNING ("%s() - create_conn failed", __func__);
l2cu_release_lcb (p_lcb);
return FALSE;
}
return TRUE;
}
/*******************************************************************************
**
** Function L2CA_SendFixedChnlData
**
** Description Write data on a fixed channel.
**
** Parameters: Fixed CID
** BD Address of remote
** Pointer to buffer of type BT_HDR
**
** Return value L2CAP_DW_SUCCESS, if data accepted
** L2CAP_DW_FAILED, if error
**
*******************************************************************************/
UINT16 L2CA_SendFixedChnlData (UINT16 fixed_cid, BD_ADDR rem_bda, BT_HDR *p_buf)
{
tL2C_LCB *p_lcb;
tBT_TRANSPORT transport = BT_TRANSPORT_BR_EDR;
L2CAP_TRACE_API ("L2CA_SendFixedChnlData() CID: 0x%04x BDA: %08x%04x", fixed_cid,
(rem_bda[0] << 24) + (rem_bda[1] << 16) + (rem_bda[2] << 8) + rem_bda[3], (rem_bda[4] << 8) + rem_bda[5]);
#if BLE_INCLUDED == TRUE
if (fixed_cid >= L2CAP_ATT_CID && fixed_cid <= L2CAP_SMP_CID) {
transport = BT_TRANSPORT_LE;
}
#endif
// Check CID is valid and registered
if ( (fixed_cid < L2CAP_FIRST_FIXED_CHNL) || (fixed_cid > L2CAP_LAST_FIXED_CHNL)
|| (l2cb.fixed_reg[fixed_cid - L2CAP_FIRST_FIXED_CHNL].pL2CA_FixedData_Cb == NULL) ) {
L2CAP_TRACE_ERROR ("L2CA_SendFixedChnlData() Invalid CID: 0x%04x", fixed_cid);
osi_free (p_buf);
return (L2CAP_DW_FAILED);
}
// Fail if BT is not yet up
if (!BTM_IsDeviceUp()) {
L2CAP_TRACE_WARNING ("L2CA_SendFixedChnlData(0x%04x) - BTU not ready", fixed_cid);
osi_free (p_buf);
return (L2CAP_DW_FAILED);
}
// We need to have a link up
if ((p_lcb = l2cu_find_lcb_by_bd_addr (rem_bda, transport)) == NULL ||
/* if link is disconnecting, also report data sending failure */
p_lcb->link_state == LST_DISCONNECTING) {
L2CAP_TRACE_WARNING ("L2CA_SendFixedChnlData(0x%04x) - no LCB", fixed_cid);
osi_free (p_buf);
return (L2CAP_DW_FAILED);
}
tL2C_BLE_FIXED_CHNLS_MASK peer_channel_mask;
// Select peer channels mask to use depending on transport
#if BLE_INCLUDED == TRUE
if (transport == BT_TRANSPORT_LE) {
peer_channel_mask = l2cb.l2c_ble_fixed_chnls_mask;
} else
#endif
{
peer_channel_mask = p_lcb->peer_chnl_mask[0];
}
if ((peer_channel_mask & (1 << fixed_cid)) == 0) {
L2CAP_TRACE_WARNING ("L2CA_SendFixedChnlData() - peer does not support fixed chnl: 0x%04x", fixed_cid);
osi_free (p_buf);
return (L2CAP_DW_FAILED);
}
p_buf->event = 0;
p_buf->layer_specific = L2CAP_FLUSHABLE_CH_BASED;
if (!p_lcb->p_fixed_ccbs[fixed_cid - L2CAP_FIRST_FIXED_CHNL]) {
if (!l2cu_initialize_fixed_ccb (p_lcb, fixed_cid, &l2cb.fixed_reg[fixed_cid - L2CAP_FIRST_FIXED_CHNL].fixed_chnl_opts)) {
L2CAP_TRACE_WARNING ("L2CA_SendFixedChnlData() - no CCB for chnl: 0x%4x", fixed_cid);
osi_free (p_buf);
return (L2CAP_DW_FAILED);
}
}
// If already congested, do not accept any more packets
if (p_lcb->p_fixed_ccbs[fixed_cid - L2CAP_FIRST_FIXED_CHNL]->cong_sent && fixed_cid != L2CAP_SMP_CID) {
L2CAP_TRACE_DEBUG ("L2CAP - CID: 0x%04x cannot send, already congested\
xmit_hold_q.count: %u buff_quota: %u", fixed_cid,
fixed_queue_length(p_lcb->p_fixed_ccbs[fixed_cid - L2CAP_FIRST_FIXED_CHNL]->xmit_hold_q),
p_lcb->p_fixed_ccbs[fixed_cid - L2CAP_FIRST_FIXED_CHNL]->buff_quota);
osi_free(p_buf);
return (L2CAP_DW_CONGESTED);
}
l2c_enqueue_peer_data (p_lcb->p_fixed_ccbs[fixed_cid - L2CAP_FIRST_FIXED_CHNL], p_buf);
l2c_link_check_send_pkts (p_lcb, NULL, NULL);
// If there is no dynamic CCB on the link, restart the idle timer each time something is sent
if (p_lcb->in_use && p_lcb->link_state == LST_CONNECTED && !p_lcb->ccb_queue.p_first_ccb) {
l2cu_no_dynamic_ccbs (p_lcb);
}
if (p_lcb->p_fixed_ccbs[fixed_cid - L2CAP_FIRST_FIXED_CHNL]->cong_sent) {
return (L2CAP_DW_CONGESTED);
}
return (L2CAP_DW_SUCCESS);
}
BOOLEAN L2CA_CheckIsCongest(UINT16 fixed_cid, BD_ADDR addr)
{
tL2C_LCB *p_lcb;
p_lcb = l2cu_find_lcb_by_bd_addr(addr, BT_TRANSPORT_LE);
if (p_lcb != NULL && p_lcb->p_fixed_ccbs[fixed_cid - L2CAP_FIRST_FIXED_CHNL] != NULL) {
return p_lcb->p_fixed_ccbs[fixed_cid - L2CAP_FIRST_FIXED_CHNL]->cong_sent;
}
return TRUE;
}
#if (BLE_INCLUDED == TRUE)
UINT16 L2CA_GetFreePktBufferNum_LE(void)
{
return l2cb.controller_le_xmit_window;
}
UINT16 L2CA_GetCurFreePktBufferNum_LE(UINT16 conn_id)
{
uint16_t num = 0;
tl2c_buff_param_t param;
param.conn_id = conn_id;
param.get_num = &num;
l2ble_update_att_acl_pkt_num(L2CA_GET_ATT_NUM, &param);
return num;
}
#endif
/*******************************************************************************
**
** Function L2CA_RemoveFixedChnl
**
** Description Remove a fixed channel to a remote device.
**
** Parameters: Fixed CID
** BD Address of remote
** Idle timeout to use (or 0xFFFF if don't care)
**
** Return value: TRUE if channel removed
**
*******************************************************************************/
BOOLEAN L2CA_RemoveFixedChnl (UINT16 fixed_cid, BD_ADDR rem_bda)
{
tL2C_LCB *p_lcb;
tL2C_CCB *p_ccb;
tBT_TRANSPORT transport = BT_TRANSPORT_BR_EDR;
/* Check CID is valid and registered */
if ( (fixed_cid < L2CAP_FIRST_FIXED_CHNL) || (fixed_cid > L2CAP_LAST_FIXED_CHNL)
|| (l2cb.fixed_reg[fixed_cid - L2CAP_FIRST_FIXED_CHNL].pL2CA_FixedData_Cb == NULL) ) {
L2CAP_TRACE_ERROR ("L2CA_RemoveFixedChnl() Invalid CID: 0x%04x", fixed_cid);
return (FALSE);
}
#if BLE_INCLUDED == TRUE
if (fixed_cid >= L2CAP_ATT_CID && fixed_cid <= L2CAP_SMP_CID) {
transport = BT_TRANSPORT_LE;
}
#endif
/* Is a fixed channel connected to the remote BDA ?*/
p_lcb = l2cu_find_lcb_by_bd_addr (rem_bda, transport);
if ( ((p_lcb) == NULL) || (!p_lcb->p_fixed_ccbs[fixed_cid - L2CAP_FIRST_FIXED_CHNL]) ) {
L2CAP_TRACE_DEBUG ("L2CA_RemoveFixedChnl() CID: 0x%04x BDA: %08x%04x not connected", fixed_cid,
(rem_bda[0] << 24) + (rem_bda[1] << 16) + (rem_bda[2] << 8) + rem_bda[3], (rem_bda[4] << 8) + rem_bda[5]);
return (FALSE);
}
L2CAP_TRACE_API ("L2CA_RemoveFixedChnl() CID: 0x%04x BDA: %08x%04x", fixed_cid,
(rem_bda[0] << 24) + (rem_bda[1] << 16) + (rem_bda[2] << 8) + rem_bda[3], (rem_bda[4] << 8) + rem_bda[5]);
/* Release the CCB, starting an inactivity timeout on the LCB if no other CCBs exist */
p_ccb = p_lcb->p_fixed_ccbs[fixed_cid - L2CAP_FIRST_FIXED_CHNL];
p_lcb->p_fixed_ccbs[fixed_cid - L2CAP_FIRST_FIXED_CHNL] = NULL;
p_lcb->disc_reason = HCI_ERR_CONN_CAUSE_LOCAL_HOST;
#if BLE_INCLUDED == TRUE
// Retain the link for a few more seconds after SMP pairing is done, since the Android
// platform always does service discovery after pairing is complete. This will avoid
// the link down (pairing is complete) and an immediate re-connection for service
// discovery.
// Some devices do not do auto advertising when link is dropped, thus fail the second
// connection and service discovery.
if ((fixed_cid == L2CAP_ATT_CID ) && !p_lcb->ccb_queue.p_first_ccb) {
p_lcb->idle_timeout = 0;
}
#endif
l2cu_release_ccb (p_ccb);
return (TRUE);
}
/*******************************************************************************
**
** Function L2CA_SetFixedChannelTout
**
** Description Higher layers call this function to set the idle timeout for
** a fixed channel. The "idle timeout" is the amount of time that
** a connection can remain up with no L2CAP channels on it.
** A timeout of zero means that the connection will be torn
** down immediately when the last channel is removed.
** A timeout of 0xFFFF means no timeout. Values are in seconds.
** A bd_addr is the remote BD address. If bd_addr = BT_BD_ANY,
** then the idle timeouts for all active l2cap links will be
** changed.
**
** Returns TRUE if command succeeded, FALSE if failed
**
*******************************************************************************/
BOOLEAN L2CA_SetFixedChannelTout (BD_ADDR rem_bda, UINT16 fixed_cid, UINT16 idle_tout)
{
tL2C_LCB *p_lcb;
tBT_TRANSPORT transport = BT_TRANSPORT_BR_EDR;
#if BLE_INCLUDED == TRUE
if (fixed_cid >= L2CAP_ATT_CID && fixed_cid <= L2CAP_SMP_CID) {
transport = BT_TRANSPORT_LE;
}
#endif
if (fixed_cid<L2CAP_FIRST_FIXED_CHNL) {
return (FALSE);
}
/* Is a fixed channel connected to the remote BDA ?*/
p_lcb = l2cu_find_lcb_by_bd_addr (rem_bda, transport);
if ( ((p_lcb) == NULL) || (!p_lcb->p_fixed_ccbs[fixed_cid - L2CAP_FIRST_FIXED_CHNL]) ) {
L2CAP_TRACE_WARNING ("L2CA_SetFixedChannelTout() CID: 0x%04x BDA: %08x%04x not connected", fixed_cid,
(rem_bda[0] << 24) + (rem_bda[1] << 16) + (rem_bda[2] << 8) + rem_bda[3], (rem_bda[4] << 8) + rem_bda[5]);
return (FALSE);
}
p_lcb->p_fixed_ccbs[fixed_cid - L2CAP_FIRST_FIXED_CHNL]->fixed_chnl_idle_tout = idle_tout;
if (p_lcb->in_use && p_lcb->link_state == LST_CONNECTED && !p_lcb->ccb_queue.p_first_ccb) {
/* If there are no dynamic CCBs, (re)start the idle timer in case we changed it */
l2cu_no_dynamic_ccbs (p_lcb);
}
return TRUE;
}
#endif /* #if (L2CAP_NUM_FIXED_CHNLS > 0) */
#if (CLASSIC_BT_INCLUDED == TRUE)
/*******************************************************************************
**
** Function L2CA_GetCurrentConfig
**
** Description This function returns configurations of L2CAP channel
** pp_our_cfg : pointer of our saved configuration options
** p_our_cfg_bits : valid config in bitmap
** pp_peer_cfg: pointer of peer's saved configuration options
** p_peer_cfg_bits : valid config in bitmap
**
** Returns TRUE if successful
**
*******************************************************************************/
BOOLEAN L2CA_GetCurrentConfig (UINT16 lcid,
tL2CAP_CFG_INFO **pp_our_cfg, tL2CAP_CH_CFG_BITS *p_our_cfg_bits,
tL2CAP_CFG_INFO **pp_peer_cfg, tL2CAP_CH_CFG_BITS *p_peer_cfg_bits)
{
tL2C_CCB *p_ccb;
L2CAP_TRACE_API ("L2CA_GetCurrentConfig() CID: 0x%04x", lcid);
p_ccb = l2cu_find_ccb_by_cid(NULL, lcid);
if (p_ccb) {
*pp_our_cfg = &(p_ccb->our_cfg);
/* convert valid config items into bitmap */
*p_our_cfg_bits = 0;
if (p_ccb->our_cfg.mtu_present) {
*p_our_cfg_bits |= L2CAP_CH_CFG_MASK_MTU;
}
if (p_ccb->our_cfg.qos_present) {
*p_our_cfg_bits |= L2CAP_CH_CFG_MASK_QOS;
}
if (p_ccb->our_cfg.flush_to_present) {
*p_our_cfg_bits |= L2CAP_CH_CFG_MASK_FLUSH_TO;
}
if (p_ccb->our_cfg.fcr_present) {
*p_our_cfg_bits |= L2CAP_CH_CFG_MASK_FCR;
}
if (p_ccb->our_cfg.fcs_present) {
*p_our_cfg_bits |= L2CAP_CH_CFG_MASK_FCS;
}
if (p_ccb->our_cfg.ext_flow_spec_present) {
*p_our_cfg_bits |= L2CAP_CH_CFG_MASK_EXT_FLOW_SPEC;
}
*pp_peer_cfg = &(p_ccb->peer_cfg);
*p_peer_cfg_bits = p_ccb->peer_cfg_bits;
return TRUE;
} else {
L2CAP_TRACE_ERROR ("No CCB for CID:0x%04x", lcid);
return FALSE;
}
}
/*******************************************************************************
**
** Function L2CA_RegForNoCPEvt
**
** Description Register callback for Number of Completed Packets event.
**
** Input Param p_cb - callback for Number of completed packets event
** p_bda - BT address of remote device
**
** Returns TRUE if registered OK, else FALSE
**
*******************************************************************************/
BOOLEAN L2CA_RegForNoCPEvt(tL2CA_NOCP_CB *p_cb, BD_ADDR p_bda)
{
tL2C_LCB *p_lcb;
/* Find the link that is associated with this remote bdaddr */
p_lcb = l2cu_find_lcb_by_bd_addr (p_bda, BT_TRANSPORT_BR_EDR);
/* If no link for this handle, nothing to do. */
if (!p_lcb) {
return FALSE;
}
p_lcb->p_nocp_cb = p_cb;
return TRUE;
}
#endif ///CLASSIC_BT_INCLUDED == TRUE
/*******************************************************************************
**
** Function L2CA_DataWrite
**
** Description Higher layers call this function to write data.
**
** Returns L2CAP_DW_SUCCESS, if data accepted, else FALSE
** L2CAP_DW_CONGESTED, if data accepted and the channel is congested
** L2CAP_DW_FAILED, if error
**
*******************************************************************************/
#if (CLASSIC_BT_INCLUDED == TRUE)
UINT8 L2CA_DataWrite (UINT16 cid, BT_HDR *p_data)
{
L2CAP_TRACE_API ("L2CA_DataWrite() CID: 0x%04x Len: %d", cid, p_data->len);
return l2c_data_write (cid, p_data, L2CAP_FLUSHABLE_CH_BASED);
}
#endif ///CLASSIC_BT_INCLUDED == TRUE
/*******************************************************************************
**
** Function L2CA_SetChnlFlushability
**
** Description Higher layers call this function to set a channels
** flushability flags
**
** Returns TRUE if CID found, else FALSE
**
*******************************************************************************/
BOOLEAN L2CA_SetChnlFlushability (UINT16 cid, BOOLEAN is_flushable)
{
#if (L2CAP_NON_FLUSHABLE_PB_INCLUDED == TRUE)
tL2C_CCB *p_ccb;
/* Find the channel control block. We don't know the link it is on. */
if ((p_ccb = l2cu_find_ccb_by_cid (NULL, cid)) == NULL) {
L2CAP_TRACE_WARNING ("L2CAP - no CCB for L2CA_SetChnlFlushability, CID: %d", cid);
return (FALSE);
}
p_ccb->is_flushable = is_flushable;
L2CAP_TRACE_API ("L2CA_SetChnlFlushability() CID: 0x%04x is_flushable: %d", cid, is_flushable);
#endif
return (TRUE);
}
/*******************************************************************************
**
** Function L2CA_DataWriteEx
**
** Description Higher layers call this function to write data with extended
** flags.
** flags : L2CAP_FLUSHABLE_CH_BASED
** L2CAP_FLUSHABLE_PKT
** L2CAP_NON_FLUSHABLE_PKT
**
** Returns L2CAP_DW_SUCCESS, if data accepted, else FALSE
** L2CAP_DW_CONGESTED, if data accepted and the channel is congested
** L2CAP_DW_FAILED, if error
**
*******************************************************************************/
#if (CLASSIC_BT_INCLUDED == TRUE)
UINT8 L2CA_DataWriteEx (UINT16 cid, BT_HDR *p_data, UINT16 flags)
{
L2CAP_TRACE_API ("L2CA_DataWriteEx() CID: 0x%04x Len: %d Flags:0x%04X",
cid, p_data->len, flags);
return l2c_data_write (cid, p_data, flags);
}
#endif ///CLASSIC_BT_INCLUDED == TRUE
/*******************************************************************************
**
** Function L2CA_FlushChannel
**
** Description This function flushes none, some or all buffers queued up
** for xmission for a particular CID. If called with
** L2CAP_FLUSH_CHANS_GET (0), it simply returns the number
** of buffers queued for that CID L2CAP_FLUSH_CHANS_ALL (0xffff)
** flushes all buffers. All other values specifies the maximum
** buffers to flush.
**
** Returns Number of buffers left queued for that CID
**
*******************************************************************************/
UINT16 L2CA_FlushChannel (UINT16 lcid, UINT16 num_to_flush)
{
tL2C_CCB *p_ccb;
tL2C_LCB *p_lcb;
UINT16 num_left = 0,
num_flushed1 = 0,
num_flushed2 = 0;
p_ccb = l2cu_find_ccb_by_cid(NULL, lcid);
if ( !p_ccb || ((p_lcb = p_ccb->p_lcb) == NULL) ) {
L2CAP_TRACE_WARNING ("L2CA_FlushChannel() abnormally returning 0 CID: 0x%04x", lcid);
return (0);
}
if (num_to_flush != L2CAP_FLUSH_CHANS_GET) {
L2CAP_TRACE_API ("L2CA_FlushChannel (FLUSH) CID: 0x%04x NumToFlush: %d QC: %u pFirst: %p",
lcid, num_to_flush,
fixed_queue_length(p_ccb->xmit_hold_q),
fixed_queue_try_peek_first(p_ccb->xmit_hold_q));
} else {
L2CAP_TRACE_API ("L2CA_FlushChannel (QUERY) CID: 0x%04x", lcid);
}
/* Cannot flush eRTM buffers once they have a sequence number */
if (p_ccb->peer_cfg.fcr.mode != L2CAP_FCR_ERTM_MODE) {
#if L2CAP_NON_FLUSHABLE_PB_INCLUDED == TRUE
if (num_to_flush != L2CAP_FLUSH_CHANS_GET) {
/* If the controller supports enhanced flush, flush the data queued at the controller */
if ( (HCI_NON_FLUSHABLE_PB_SUPPORTED(BTM_ReadLocalFeatures ()))
&& (BTM_GetNumScoLinks() == 0) ) {
if ( l2cb.is_flush_active == FALSE ) {
l2cb.is_flush_active = TRUE;
/* The only packet type defined - 0 - Automatically-Flushable Only */
btsnd_hcic_enhanced_flush (p_lcb->handle, 0);
}
}
}
#endif
// Iterate though list and flush the amount requested from
// the transmit data queue that satisfy the layer and event conditions.
for (const list_node_t *node = list_begin(p_lcb->link_xmit_data_q);
(num_to_flush > 0) && node != list_end(p_lcb->link_xmit_data_q);) {
BT_HDR *p_buf = (BT_HDR *)list_node(node);
node = list_next(node);
if ((p_buf->layer_specific == 0) && (p_buf->event == lcid)) {
num_to_flush--;
num_flushed1++;
list_remove(p_lcb->link_xmit_data_q, p_buf);
osi_free(p_buf);
}
}
}
/* If needed, flush buffers in the CCB xmit hold queue */
while ( (num_to_flush != 0) && (!fixed_queue_is_empty(p_ccb->xmit_hold_q))) {
BT_HDR *p_buf = (BT_HDR *)fixed_queue_dequeue(p_ccb->xmit_hold_q, 0);
if (p_buf) {
osi_free (p_buf);
}
num_to_flush--;
num_flushed2++;
}
/* If app needs to track all packets, call him */
if ( (p_ccb->p_rcb) && (p_ccb->p_rcb->api.pL2CA_TxComplete_Cb) && (num_flushed2) ) {
(*p_ccb->p_rcb->api.pL2CA_TxComplete_Cb)(p_ccb->local_cid, num_flushed2);
}
/* Now count how many are left */
for (const list_node_t *node = list_begin(p_lcb->link_xmit_data_q);
node != list_end(p_lcb->link_xmit_data_q);
node = list_next(node)) {
BT_HDR *p_buf = (BT_HDR *)list_node(node);
if (p_buf->event == lcid) {
num_left++;
}
}
/* Add in the number in the CCB xmit queue */
num_left += fixed_queue_length(p_ccb->xmit_hold_q);
/* Return the local number of buffers left for the CID */
L2CAP_TRACE_DEBUG ("L2CA_FlushChannel() flushed: %u + %u, num_left: %u", num_flushed1, num_flushed2, num_left);
/* If we were congested, and now we are not, tell the app */
l2cu_check_channel_congestion (p_ccb);
return (num_left);
}
/******************************************************************************
**
** Function update_acl_pkt_num
**
** Description Update the number of att acl packets to be sent in xmit_hold_q.
**
** Returns None
**
*******************************************************************************/
#if BLE_INCLUDED == TRUE
void l2ble_update_att_acl_pkt_num(UINT8 type, tl2c_buff_param_t *param)
{
static SemaphoreHandle_t buff_semaphore = NULL ;
static INT16 btc_buf;
static INT16 btu_buf;
if(buff_semaphore == NULL && type != L2CA_BUFF_INI){
L2CAP_TRACE_ERROR("%s buff_semaphore not init", __func__);
return;
}
switch (type)
{
case L2CA_ADD_BTC_NUM:{
xSemaphoreTake(buff_semaphore, portMAX_DELAY);
btc_buf ++;
xSemaphoreGive(buff_semaphore);
break;
}
case L2CA_DECREASE_BTC_NUM:{
xSemaphoreTake(buff_semaphore, portMAX_DELAY);
btc_buf --;
xSemaphoreGive(buff_semaphore);
break;
}
case L2CA_ADD_BTU_NUM:{
xSemaphoreTake(buff_semaphore, portMAX_DELAY);
btu_buf ++;
xSemaphoreGive(buff_semaphore);
break;
}
case L2CA_DECREASE_BTU_NUM:{
xSemaphoreTake(buff_semaphore, portMAX_DELAY);
btu_buf --;
xSemaphoreGive(buff_semaphore);
break;
}
case L2CA_GET_ATT_NUM:{
xSemaphoreTake(buff_semaphore, portMAX_DELAY);
INT16 att_acl_pkt_num = 0;
INT16 att_max_num = 0;
*(param->get_num) = 0;
UINT8 tcb_idx = param->conn_id;
tGATT_TCB * p_tcb = gatt_get_tcb_by_idx(tcb_idx);
if (p_tcb == NULL){
L2CAP_TRACE_ERROR("%s not found p_tcb", __func__);
xSemaphoreGive(buff_semaphore);
break;
}
tL2C_LCB * p_lcb = l2cu_find_lcb_by_bd_addr (p_tcb->peer_bda, BT_TRANSPORT_LE);
if (p_lcb == NULL){
L2CAP_TRACE_ERROR("%s not found p_lcb", __func__);
xSemaphoreGive(buff_semaphore);
break;
}
fixed_queue_t * queue = p_lcb->p_fixed_ccbs[L2CAP_ATT_CID - L2CAP_FIRST_FIXED_CHNL]->xmit_hold_q;
att_max_num = MIN(p_lcb->link_xmit_quota, L2CAP_CACHE_ATT_ACL_NUM);
if (queue == NULL){
L2CAP_TRACE_ERROR("%s not found queue", __func__);
xSemaphoreGive(buff_semaphore);
break;
}
att_acl_pkt_num = fixed_queue_length(queue);
if(att_acl_pkt_num < att_max_num){
if(btc_buf + btu_buf < att_max_num - att_acl_pkt_num){
*(param->get_num) = att_max_num - att_acl_pkt_num - (btc_buf + btu_buf);
}
}
xSemaphoreGive(buff_semaphore);
break;
}
case L2CA_BUFF_INI:{
btc_buf = 0;
btu_buf = 0;
buff_semaphore = xSemaphoreCreateBinary();
if (buff_semaphore == NULL) {
L2CAP_TRACE_ERROR("%s NO MEMORY", __func__);
break;
}
xSemaphoreGive(buff_semaphore);
break;
}
case L2CA_BUFF_DEINIT:{
xSemaphoreTake(buff_semaphore, portMAX_DELAY);
btc_buf = 0;
btu_buf = 0;
xSemaphoreGive(buff_semaphore);
vSemaphoreDelete(buff_semaphore);
buff_semaphore = NULL;
break;
}
default:
break;
}
}
#endif
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