117 lines
5.1 KiB
C
117 lines
5.1 KiB
C
/*
|
|
* Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
|
|
* contributor license agreements. See the NOTICE file distributed with
|
|
* this work for additional information regarding copyright ownership.
|
|
* The OpenAirInterface Software Alliance licenses this file to You under
|
|
* the OAI Public License, Version 1.1 (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.openairinterface.org/?page_id=698
|
|
*
|
|
* 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.
|
|
*-------------------------------------------------------------------------------
|
|
* For more information about the OpenAirInterface (OAI) Software Alliance:
|
|
* contact@openairinterface.org
|
|
*/
|
|
|
|
#ifndef TLV_ENCODER_H_
|
|
#define TLV_ENCODER_H_
|
|
|
|
#include <arpa/inet.h> // htonl, htons
|
|
#include <string.h> // memcpy
|
|
|
|
#define ENCODE_U8(buffer, value, size) \
|
|
do { \
|
|
*(uint8_t*)(buffer) = value; \
|
|
size += sizeof(uint8_t); \
|
|
} while (0)
|
|
|
|
/* Safely encodes a 16-bit value into a buffer, handling
|
|
misalignment by memcpy 2 bytes to buffer in network
|
|
byte order (big-endian). */
|
|
#define ENCODE_U16(buffer, value, size) \
|
|
do { \
|
|
uint16_t _val = htons(value); \
|
|
memcpy((buffer), &_val, sizeof(uint16_t)); \
|
|
size += sizeof(uint16_t); \
|
|
} while (0)
|
|
|
|
/* Safely encodes a 24-bit value into a buffer, handling
|
|
misalignment by using htonl and memcpy to copy 3 bytes
|
|
in network byte order (big-endian). */
|
|
#define ENCODE_U24(buffer, value, size) \
|
|
do { \
|
|
uint32_t _val = htonl(value); \
|
|
memcpy((buffer), ((uint8_t*)&_val) + 1, 3); \
|
|
size += sizeof(uint8_t) + sizeof(uint16_t); \
|
|
} while (0)
|
|
|
|
#define ENCODE_U32(buffer, value, size) \
|
|
do { \
|
|
uint32_t tmp = htonl(value); \
|
|
memcpy(buffer, &tmp, sizeof(tmp)); \
|
|
size += sizeof(uint32_t); \
|
|
} while (0)
|
|
|
|
#define IES_ENCODE_U8(buffer, encoded, value) \
|
|
ENCODE_U8(buffer + encoded, value, encoded)
|
|
|
|
#define IES_ENCODE_U16(buffer, encoded, value) \
|
|
ENCODE_U16(buffer + encoded, value, encoded)
|
|
|
|
#define IES_ENCODE_U24(buffer, encoded, value) \
|
|
ENCODE_U24(buffer + encoded, value, encoded)
|
|
|
|
#define IES_ENCODE_U32(buffer, encoded, value) \
|
|
ENCODE_U32(buffer + encoded, value, encoded)
|
|
|
|
typedef enum {
|
|
TLV_ENCODE_ERROR_OK = 0,
|
|
TLV_ENCODE_VALUE_DOESNT_MATCH = -1,
|
|
/* Fatal errors - message should not be sent */
|
|
TLV_ENCODE_OCTET_STRING_TOO_LONG_FOR_IEI = -10,
|
|
TLV_ENCODE_WRONG_MESSAGE_TYPE = -11,
|
|
TLV_ENCODE_PROTOCOL_NOT_SUPPORTED = -12,
|
|
TLV_ENCODE_BUFFER_TOO_SHORT = -13,
|
|
TLV_ENCODE_BUFFER_NULL = -14,
|
|
} tlv_encoder_error_code;
|
|
|
|
/* Defines error code limit below which message should be sent because
|
|
* it cannot be further processed */
|
|
#define TLV_ENCODE_FATAL_ERROR (TLV_ENCODE_VALUE_DOESNT_MATCH)
|
|
|
|
#ifdef ENABLE_TESTS
|
|
#define TLV_ENC_ERROR(...) fprintf(stderr, "TLV Encoder: " __VA_ARGS__)
|
|
#else
|
|
#define TLV_ENC_ERROR(...) // Do nothing
|
|
#endif
|
|
|
|
#define CHECK_PDU_POINTER_AND_LENGTH_ENCODER(bUFFER, mINIMUMlENGTH, lENGTH) \
|
|
do { \
|
|
if ((bUFFER) == NULL) { \
|
|
TLV_ENC_ERROR("Got NULL pointer for the payload\n"); \
|
|
return TLV_ENCODE_BUFFER_NULL; \
|
|
} \
|
|
if ((lENGTH) < (mINIMUMlENGTH)) { \
|
|
TLV_ENC_ERROR("(%s:%d) Expecting at least %d bytes, got %u\n", __FILE__, __LINE__, (mINIMUMlENGTH), (lENGTH)); \
|
|
return TLV_ENCODE_BUFFER_TOO_SHORT; \
|
|
} \
|
|
} while (0)
|
|
|
|
#define CHECK_PDU_POINTER_ENCODER(bUFFER) \
|
|
do { \
|
|
if ((bUFFER) == NULL) { \
|
|
TLV_ENC_ERROR("Got NULL pointer for the payload\n"); \
|
|
errorCodeEncoder = TLV_ENCODE_BUFFER_NULL; \
|
|
return TLV_ENCODE_BUFFER_NULL; \
|
|
} \
|
|
} while (0)
|
|
|
|
#endif /* define (TLV_ENCODER_H_) */
|
|
|