mirror of https://github.com/pvnis/srsRAN_4G.git
You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
97 lines
2.6 KiB
C++
97 lines
2.6 KiB
C++
/**
|
|
*
|
|
* \section COPYRIGHT
|
|
*
|
|
* Copyright 2013-2017 Software Radio Systems Limited
|
|
*
|
|
* \section LICENSE
|
|
*
|
|
* This file is part of the srsLTE library.
|
|
*
|
|
* srsUE is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU Affero General Public License as
|
|
* published by the Free Software Foundation, either version 3 of
|
|
* the License, or (at your option) any later version.
|
|
*
|
|
* srsUE is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU Affero General Public License for more details.
|
|
*
|
|
* A copy of the GNU Affero General Public License can be found in
|
|
* the LICENSE file in the top-level directory of this distribution
|
|
* and at http://www.gnu.org/licenses/.
|
|
*
|
|
*/
|
|
|
|
#ifndef SRSLTE_GTPU_H
|
|
#define SRSLTE_GTPU_H
|
|
|
|
#include <stdint.h>
|
|
#include "srslte/common/common.h"
|
|
#include "srslte/common/log.h"
|
|
|
|
namespace srslte {
|
|
|
|
/****************************************************************************
|
|
* GTPU Header
|
|
* Ref: 3GPP TS 29.281 v10.1.0 Section 5
|
|
*
|
|
* | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 |
|
|
*
|
|
* 1 | Version |PT | * | E | S |PN |
|
|
* 2 | Message Type |
|
|
* 3 | Length (1st Octet) |
|
|
* 4 | Length (2nd Octet) |
|
|
* 5 | TEID (1st Octet) |
|
|
* 6 | TEID (2nd Octet) |
|
|
* 7 | TEID (3rd Octet) |
|
|
* 8 | TEID (4th Octet) |
|
|
***************************************************************************/
|
|
|
|
#define GTPU_HEADER_LEN 8
|
|
|
|
typedef struct{
|
|
uint8_t flags; // Only support 0x30 - v1, PT1 (GTP), no other flags
|
|
uint8_t message_type; // Only support 0xFF - T-PDU type
|
|
uint16_t length;
|
|
uint32_t teid;
|
|
}gtpu_header_t;
|
|
|
|
|
|
bool gtpu_read_header(srslte::byte_buffer_t *pdu, gtpu_header_t *header, srslte::log *gtpu_log);
|
|
bool gtpu_write_header(gtpu_header_t *header, srslte::byte_buffer_t *pdu, srslte::log *gtpu_log);
|
|
|
|
inline void uint8_to_uint32(uint8_t *buf, uint32_t *i)
|
|
{
|
|
*i = (uint32_t)buf[0] << 24 |
|
|
(uint32_t)buf[1] << 16 |
|
|
(uint32_t)buf[2] << 8 |
|
|
(uint32_t)buf[3];
|
|
}
|
|
|
|
inline void uint32_to_uint8(uint32_t i, uint8_t *buf)
|
|
{
|
|
buf[0] = (i >> 24) & 0xFF;
|
|
buf[1] = (i >> 16) & 0xFF;
|
|
buf[2] = (i >> 8) & 0xFF;
|
|
buf[3] = i & 0xFF;
|
|
}
|
|
|
|
inline void uint8_to_uint16(uint8_t *buf, uint16_t *i)
|
|
{
|
|
*i = (uint32_t)buf[0] << 8 |
|
|
(uint32_t)buf[1];
|
|
}
|
|
|
|
inline void uint16_to_uint8(uint16_t i, uint8_t *buf)
|
|
{
|
|
buf[0] = (i >> 8) & 0xFF;
|
|
buf[1] = i & 0xFF;
|
|
}
|
|
|
|
|
|
}//namespace
|
|
|
|
#endif
|