You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
92 lines
2.7 KiB
92 lines
2.7 KiB
/*
|
|
* Copyright 2020 The Android Open Source Project
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
#define LOG_TAG "btm"
|
|
|
|
#include <cstdint>
|
|
#include "stack/btm/btm_int_types.h" // tBTM_CB
|
|
#include "stack/include/rfcdefs.h" // PORT_MAX_RFC_PORTS
|
|
|
|
extern tBTM_CB btm_cb;
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* Function BTM_AllocateSCN
|
|
*
|
|
* Description Look through the Server Channel Numbers for a free one.
|
|
*
|
|
* Returns Allocated SCN number or 0 if none.
|
|
*
|
|
******************************************************************************/
|
|
uint8_t BTM_AllocateSCN(void) {
|
|
uint8_t x;
|
|
BTM_TRACE_DEBUG("BTM_AllocateSCN");
|
|
|
|
// stack reserves scn 1 for HFP, HSP we still do the correct way
|
|
for (x = 1; x < PORT_MAX_RFC_PORTS; x++) {
|
|
if (!btm_cb.btm_scn[x]) {
|
|
btm_cb.btm_scn[x] = true;
|
|
return (x + 1);
|
|
}
|
|
}
|
|
|
|
return (0); /* No free ports */
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* Function BTM_TryAllocateSCN
|
|
*
|
|
* Description Try to allocate a fixed server channel
|
|
*
|
|
* Returns Returns true if server channel was available
|
|
*
|
|
******************************************************************************/
|
|
|
|
bool BTM_TryAllocateSCN(uint8_t scn) {
|
|
/* Make sure we don't exceed max port range.
|
|
* Stack reserves scn 1 for HFP, HSP we still do the correct way.
|
|
*/
|
|
if ((scn >= PORT_MAX_RFC_PORTS) || (scn == 1) || (scn == 0)) return false;
|
|
|
|
/* check if this port is available */
|
|
if (!btm_cb.btm_scn[scn - 1]) {
|
|
btm_cb.btm_scn[scn - 1] = true;
|
|
return true;
|
|
}
|
|
|
|
return (false); /* Port was busy */
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* Function BTM_FreeSCN
|
|
*
|
|
* Description Free the specified SCN.
|
|
*
|
|
* Returns true or false
|
|
*
|
|
******************************************************************************/
|
|
bool BTM_FreeSCN(uint8_t scn) {
|
|
BTM_TRACE_DEBUG("BTM_FreeSCN ");
|
|
if (scn <= PORT_MAX_RFC_PORTS && scn > 0) {
|
|
btm_cb.btm_scn[scn - 1] = false;
|
|
return (true);
|
|
} else {
|
|
return (false); /* Illegal SCN passed in */
|
|
}
|
|
}
|