1 /******************************************************************
3 * Copyright 2016 Samsung Electronics All Rights Reserved.
7 * Licensed under the Apache License, Version 2.0 (the "License");
8 * you may not use this file except in compliance with the License.
9 * You may obtain a copy of the License at
11 * http://www.apache.org/licenses/LICENSE-2.0
13 * Unless required by applicable law or agreed to in writing, software
14 * distributed under the License is distributed on an "AS IS" BASIS,
15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 * See the License for the specific language governing permissions and
17 * limitations under the License.
19 ******************************************************************/
25 #include "caadapterutils.h"
26 #include "cafragmentation.h"
27 #include "caleinterface.h"
30 * Debugging tag for fragmentation module.
32 #define TAG "OIC_CA_FRAG"
34 //packet format define value
35 #define CA_BLE_START_POS 7
36 #define CA_BLE_START_LEN 1
37 #define CA_BLE_SOURCE_PORT_POS 6
38 #define CA_BLE_SOURCE_PORT_LEN 7
39 #define CA_BLE_SECURE_POS 7
40 #define CA_BLE_SECURE_LEN 1
41 #define CA_BLE_DESTINATION_PORT_POS 6
42 #define CA_BLE_DESTINATION_PORT_LEN 7
45 * This function is used to set value in specific bit position.
47 * @param[out] x Pointer to the octet variable that will contain
48 * value in specific bit position.
49 * @param[in] p Position which need to embed specific bits(0~7).
50 * @param[in] n Length to fill several bits from the position.
51 * @param[in] v Value to contain in specific bit position.
53 static void CASetBits(uint8_t *x, unsigned p, unsigned n, unsigned v)
57 OIC_LOG(ERROR, TAG, "set bits - lower err");
60 else if(~(unsigned)(~0u<<n) < v)
62 OIC_LOG(ERROR, TAG, "set bits - upper err");
65 *x = (*x & (~(~0u << (p-n+1)))) | (*x & (~0u << (p+1))) | ((v & ~(~0u << n)) << (p-n+1));
69 * This function is used to get value in specific bit position.
71 * @param[in] x Pointer to the octet variable that have infomation
73 * @param[in] p Position which need to get specific bits(0~7).
74 * @param[in] n Length to get several bits from the position.
76 * @return @c Extracted value from specific position.
78 static uint8_t CAGetBits(uint8_t x, unsigned p, unsigned n)
80 return (x >> (p + 1 - n)) & ~(~0u << n);
83 CAResult_t CAGenerateVariableForFragmentation(size_t dataLength,
84 uint32_t *midPacketCount,
89 OIC_LOG_V(DEBUG, TAG, "IN, dataLength = %zu, mtu = %zu", dataLength, mtuSize);
91 size_t remainDataSize = 0;
93 mtuSize - (CA_BLE_HEADER_SIZE + CA_BLE_LENGTH_HEADER_SIZE);
94 //total data size is smaller than 14 byte case.
95 if (dataLength < dataOnlyLen)
101 remainDataSize = dataLength - dataOnlyLen;
104 if (mtuSize - CA_BLE_HEADER_SIZE <= 0)
106 OIC_LOG_V(ERROR, TAG, "BLE header size shouldn't be bigger than BLE MTU size.");
107 return CA_STATUS_FAILED;
110 *midPacketCount = (uint32_t)remainDataSize / (mtuSize - CA_BLE_HEADER_SIZE);
111 *remainingLen = (uint32_t)remainDataSize % (mtuSize - CA_BLE_HEADER_SIZE);
112 uint32_t remainHeaderSize = CA_BLE_HEADER_SIZE * (*midPacketCount + (*remainingLen == 0 ? 0:1));
113 *totalLength = dataLength + (CA_BLE_HEADER_SIZE + CA_BLE_LENGTH_HEADER_SIZE) + remainHeaderSize;
115 OIC_LOG(DEBUG, TAG, "OUT");
120 CAResult_t CAGenerateHeader(uint8_t *header,
121 CABLEPacketStart_t type,
122 const uint8_t sourcePort,
123 CABLEPacketSecure_t secure,
124 const uint8_t destPort)
126 OIC_LOG(DEBUG, TAG, "IN");
128 VERIFY_NON_NULL(header, TAG, "header is NULL");
130 if (sourcePort > CA_SUPPORTED_BLE_MAX_PORT ||
131 sourcePort < CA_SUPPORTED_BLE_MIN_PORT ||
132 destPort > CA_SUPPORTED_BLE_MAX_PORT)
134 OIC_LOG_V(ERROR, TAG, "source port(%d) or destination port(%d) is invalid number!!",
135 sourcePort, destPort);
136 return CA_STATUS_FAILED;
139 CASetBits(&header[0], CA_BLE_START_POS, CA_BLE_START_LEN, type);
140 CASetBits(&header[0], CA_BLE_SOURCE_PORT_POS, CA_BLE_SOURCE_PORT_LEN, sourcePort);
141 CASetBits(&header[1], CA_BLE_SECURE_POS, CA_BLE_SECURE_LEN, secure);
142 CASetBits(&header[1], CA_BLE_DESTINATION_PORT_POS, CA_BLE_DESTINATION_PORT_LEN, destPort);
147 CAResult_t CAGenerateHeaderPayloadLength(uint8_t *header,
151 VERIFY_NON_NULL(header, TAG, "header is NULL");
153 if (headerLength != CA_BLE_LENGTH_HEADER_SIZE)
155 return CA_STATUS_FAILED;
158 for(size_t idx = 1; idx < CA_BLE_LENGTH_HEADER_SIZE; idx++)
160 header[CA_BLE_LENGTH_HEADER_SIZE - idx] = dataLength & 0xFF;
163 header[0] = dataLength & 0xFF;
168 CAResult_t CAMakeFirstDataSegment(uint8_t *dataSegment,
170 const uint32_t dataLength,
171 const uint8_t *dataHeader,
172 const uint8_t *lengthHeader)
174 OIC_LOG(DEBUG, TAG, "IN");
176 VERIFY_NON_NULL(dataSegment, TAG, "dataSegment is NULL");
177 VERIFY_NON_NULL(dataHeader, TAG, "dataHeader is NULL");
178 VERIFY_NON_NULL(lengthHeader, TAG, "lengthHeader is NULL");
180 memcpy(dataSegment, dataHeader, CA_BLE_HEADER_SIZE);
181 memcpy(dataSegment + CA_BLE_HEADER_SIZE, lengthHeader, CA_BLE_LENGTH_HEADER_SIZE);
182 memcpy(dataSegment + CA_BLE_HEADER_SIZE + CA_BLE_LENGTH_HEADER_SIZE, data, dataLength);
184 OIC_LOG(DEBUG, TAG, "OUT");
189 CAResult_t CAMakeRemainDataSegment(uint8_t *dataSegment,
190 const uint32_t segmentPayloadLength,
191 const uint8_t *sourceData,
192 const uint32_t sourceDataLength,
193 const uint32_t segmentNum,
194 const uint8_t *dataHeader,
197 OIC_LOG(DEBUG, TAG, "IN");
199 VERIFY_NON_NULL(dataSegment, TAG, "dataSegment is NULL");
200 VERIFY_NON_NULL(dataHeader, TAG, "dataHeader is NULL");
202 uint32_t index = (mtuSize - CA_BLE_HEADER_SIZE - CA_BLE_LENGTH_HEADER_SIZE) +
203 (segmentNum * (mtuSize - CA_BLE_HEADER_SIZE));
204 if (sourceDataLength < index + segmentPayloadLength)
206 OIC_LOG(DEBUG, TAG, "dataSegment will exceed");
207 return CA_STATUS_FAILED;
210 memcpy(dataSegment, dataHeader, CA_BLE_HEADER_SIZE);
211 memcpy(dataSegment + CA_BLE_HEADER_SIZE, sourceData + index, segmentPayloadLength);
213 OIC_LOG(DEBUG, TAG, "OUT");
218 CAResult_t CAParseHeader(const uint8_t *header,
219 CABLEPacketStart_t *startFlag,
220 uint16_t *sourcePort,
221 CABLEPacketSecure_t *secureFlag,
224 OIC_LOG(DEBUG, TAG, "IN");
226 VERIFY_NON_NULL(header, TAG, "header is NULL");
228 *startFlag = CAGetBits(header[0], CA_BLE_START_POS, CA_BLE_START_LEN);
229 *sourcePort = CAGetBits(header[0], CA_BLE_SOURCE_PORT_POS, CA_BLE_SOURCE_PORT_LEN);
230 *secureFlag = CAGetBits(header[1], CA_BLE_SECURE_POS, CA_BLE_SECURE_LEN);
231 *destPort = CAGetBits(header[1], CA_BLE_DESTINATION_PORT_POS, CA_BLE_DESTINATION_PORT_LEN);
233 OIC_LOG(DEBUG, TAG, "OUT");
238 CAResult_t CAParseHeaderPayloadLength(uint8_t *header,
240 uint32_t *dataLength)
242 OIC_LOG(DEBUG, TAG, "IN");
243 VERIFY_NON_NULL(header, TAG, "header is NULL");
245 if (headerLength != CA_BLE_LENGTH_HEADER_SIZE)
247 return CA_STATUS_FAILED;
250 for(size_t idx = 0; idx < headerLength; idx++)
253 *dataLength |= header[CA_BLE_HEADER_SIZE+idx];
256 OIC_LOG(DEBUG, TAG, "OUT");