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/******************************************************************************
*
* Copyright 2018 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.
*
******************************************************************************/
#include "stack_test_packet_utils.h"
#include "hci/include/hci_layer.h"
#include "osi/include/allocator.h"
#include "stack/include/bt_hdr.h"
#include "stack/include/l2c_api.h"
#include "stack/include/l2cdefs.h"
namespace bluetooth {
std::vector<uint8_t> CreateL2capDataPacket(uint16_t lcid,
const std::vector<uint8_t>& data) {
// Data in little endian order
std::vector<uint8_t> result;
auto data_size = static_cast<uint16_t>(data.size());
result.push_back(static_cast<uint8_t>(data_size));
result.push_back(static_cast<uint8_t>(data_size >> 8));
result.push_back(static_cast<uint8_t>(lcid));
result.push_back(static_cast<uint8_t>(lcid >> 8));
result.insert(result.end(), data.begin(), data.end());
return result;
}
std::vector<uint8_t> CreateAclPacket(uint16_t handle, uint8_t pb, uint8_t bc,
const std::vector<uint8_t>& data) {
// Data in little endian order
std::vector<uint8_t> result;
result.push_back(static_cast<uint8_t>(handle & 0x0F));
uint8_t second_byte = 0;
second_byte |= (bc << 6) & 0b11000000;
second_byte |= (pb << 4) & 0b00110000;
second_byte |= (handle >> 8) & 0b00001111;
result.push_back(second_byte);
auto data_size = static_cast<uint16_t>(data.size());
result.push_back(static_cast<uint8_t>(data_size));
result.push_back(static_cast<uint8_t>(data_size >> 8));
result.insert(result.end(), data.begin(), data.end());
return result;
}
BT_HDR* AllocateWrappedIncomingL2capAclPacket(const uint8_t* acl_packet_bytes,
size_t buffer_length) {
size_t packet_size = buffer_length + BT_HDR_SIZE;
auto packet = reinterpret_cast<BT_HDR*>(osi_malloc(packet_size));
// Add ACL packet overhead + L2CAP packet overhead
packet->offset = 4 + L2CAP_PKT_OVERHEAD;
packet->len = static_cast<uint16_t>(buffer_length - 4 - L2CAP_PKT_OVERHEAD);
packet->layer_specific = 0;
packet->event = MSG_HC_TO_STACK_HCI_ACL;
memcpy(packet->data, acl_packet_bytes, buffer_length);
return packet;
}
BT_HDR* AllocateWrappedIncomingL2capAclPacket(
const std::vector<uint8_t>& buffer) {
return AllocateWrappedIncomingL2capAclPacket(buffer.data(), buffer.size());
}
BT_HDR* AllocateWrappedOutgoingL2capAclPacket(const uint8_t* acl_packet_bytes,
size_t buffer_length) {
size_t acl_l2cap_header_size = 4 + L2CAP_PKT_OVERHEAD;
CHECK_GE(L2CAP_MIN_OFFSET, static_cast<int>(acl_l2cap_header_size));
size_t packet_size =
BT_HDR_SIZE + L2CAP_MIN_OFFSET + buffer_length - acl_l2cap_header_size;
auto packet = reinterpret_cast<BT_HDR*>(osi_malloc(packet_size));
packet->offset = L2CAP_MIN_OFFSET;
packet->len = static_cast<uint16_t>(buffer_length - acl_l2cap_header_size);
packet->layer_specific = 0;
packet->event = 0;
memcpy(packet->data + packet->offset - acl_l2cap_header_size,
acl_packet_bytes, buffer_length);
return packet;
}
BT_HDR* AllocateWrappedOutgoingL2capAclPacket(
const std::vector<uint8_t>& buffer) {
return AllocateWrappedOutgoingL2capAclPacket(buffer.data(), buffer.size());
}
} // namespace bluetooth
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