96 lines
3.8 KiB
C++
96 lines
3.8 KiB
C++
/******************************************************************************
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*
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* Copyright 2018 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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******************************************************************************/
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#include "hci_layer.h"
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#include "l2c_api.h"
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#include "osi/include/allocator.h"
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#include "stack_test_packet_utils.h"
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namespace bluetooth {
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std::vector<uint8_t> CreateL2capDataPacket(uint16_t lcid,
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const std::vector<uint8_t>& data) {
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// Data in little endian order
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std::vector<uint8_t> result;
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auto data_size = static_cast<uint16_t>(data.size());
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result.push_back(static_cast<uint8_t>(data_size));
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result.push_back(static_cast<uint8_t>(data_size >> 8));
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result.push_back(static_cast<uint8_t>(lcid));
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result.push_back(static_cast<uint8_t>(lcid >> 8));
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result.insert(result.end(), data.begin(), data.end());
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return result;
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}
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std::vector<uint8_t> CreateAclPacket(uint16_t handle, uint8_t pb, uint8_t bc,
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const std::vector<uint8_t>& data) {
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// Data in little endian order
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std::vector<uint8_t> result;
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result.push_back(static_cast<uint8_t>(handle & 0x0F));
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uint8_t second_byte = 0;
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second_byte |= (bc << 6) & 0b11000000;
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second_byte |= (pb << 4) & 0b00110000;
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second_byte |= (handle >> 8) & 0b00001111;
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result.push_back(second_byte);
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auto data_size = static_cast<uint16_t>(data.size());
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result.push_back(static_cast<uint8_t>(data_size));
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result.push_back(static_cast<uint8_t>(data_size >> 8));
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result.insert(result.end(), data.begin(), data.end());
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return result;
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}
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BT_HDR* AllocateWrappedIncomingL2capAclPacket(const uint8_t* acl_packet_bytes,
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size_t buffer_length) {
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size_t packet_size = buffer_length + BT_HDR_SIZE;
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auto packet = reinterpret_cast<BT_HDR*>(osi_malloc(packet_size));
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// Add ACL packet overhead + L2CAP packet overhead
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packet->offset = 4 + L2CAP_PKT_OVERHEAD;
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packet->len = static_cast<uint16_t>(buffer_length - 4 - L2CAP_PKT_OVERHEAD);
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packet->layer_specific = 0;
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packet->event = MSG_HC_TO_STACK_HCI_ACL;
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memcpy(packet->data, acl_packet_bytes, buffer_length);
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return packet;
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}
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BT_HDR* AllocateWrappedIncomingL2capAclPacket(
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const std::vector<uint8_t>& buffer) {
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return AllocateWrappedIncomingL2capAclPacket(buffer.data(), buffer.size());
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}
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BT_HDR* AllocateWrappedOutgoingL2capAclPacket(const uint8_t* acl_packet_bytes,
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size_t buffer_length) {
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size_t acl_l2cap_header_size = 4 + L2CAP_PKT_OVERHEAD;
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CHECK_GE(L2CAP_MIN_OFFSET, static_cast<int>(acl_l2cap_header_size));
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size_t packet_size =
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BT_HDR_SIZE + L2CAP_MIN_OFFSET + buffer_length - acl_l2cap_header_size;
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auto packet = reinterpret_cast<BT_HDR*>(osi_malloc(packet_size));
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packet->offset = L2CAP_MIN_OFFSET;
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packet->len = static_cast<uint16_t>(buffer_length - acl_l2cap_header_size);
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packet->layer_specific = 0;
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packet->event = 0;
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memcpy(packet->data + packet->offset - acl_l2cap_header_size,
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acl_packet_bytes, buffer_length);
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return packet;
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}
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BT_HDR* AllocateWrappedOutgoingL2capAclPacket(
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const std::vector<uint8_t>& buffer) {
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return AllocateWrappedOutgoingL2capAclPacket(buffer.data(), buffer.size());
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}
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} // namespace bluetooth
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