mirror of https://github.com/PentHertz/srsLTE.git
96 lines
2.5 KiB
C++
96 lines
2.5 KiB
C++
/**
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*
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* \section COPYRIGHT
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*
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* Copyright 2013-2017 Software Radio Systems Limited
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*
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* \section LICENSE
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*
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* This file is part of the srsLTE library.
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*
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* srsUE is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as
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* published by the Free Software Foundation, either version 3 of
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* the License, or (at your option) any later version.
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*
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* srsUE is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* A copy of the GNU Affero General Public License can be found in
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* the LICENSE file in the top-level directory of this distribution
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* and at http://www.gnu.org/licenses/.
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*
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*/
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#ifndef SRSLTE_GTPU_H
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#define SRSLTE_GTPU_H
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#include <stdint.h>
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#include "srslte/common/common.h"
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namespace srslte {
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/****************************************************************************
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* GTPU Header
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* Ref: 3GPP TS 29.281 v10.1.0 Section 5
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*
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* | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 |
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*
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* 1 | Version |PT | * | E | S |PN |
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* 2 | Message Type |
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* 3 | Length (1st Octet) |
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* 4 | Length (2nd Octet) |
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* 5 | TEID (1st Octet) |
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* 6 | TEID (2nd Octet) |
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* 7 | TEID (3rd Octet) |
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* 8 | TEID (4th Octet) |
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***************************************************************************/
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#define GTPU_HEADER_LEN 8
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typedef struct{
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uint8_t flags; // Only support 0x30 - v1, PT1 (GTP), no other flags
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uint8_t message_type; // Only support 0xFF - T-PDU type
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uint16_t length;
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uint32_t teid;
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}gtpu_header_t;
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bool gtpu_read_header(srslte::byte_buffer_t *pdu, gtpu_header_t *header);
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bool gtpu_write_header(gtpu_header_t *header, srslte::byte_buffer_t *pdu);
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inline void uint8_to_uint32(uint8_t *buf, uint32_t *i)
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{
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*i = (uint32_t)buf[0] << 24 |
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(uint32_t)buf[1] << 16 |
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(uint32_t)buf[2] << 8 |
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(uint32_t)buf[3];
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}
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inline void uint32_to_uint8(uint32_t i, uint8_t *buf)
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{
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buf[0] = (i >> 24) & 0xFF;
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buf[1] = (i >> 16) & 0xFF;
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buf[2] = (i >> 8) & 0xFF;
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buf[3] = i & 0xFF;
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}
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inline void uint8_to_uint16(uint8_t *buf, uint16_t *i)
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{
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*i = (uint32_t)buf[0] << 8 |
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(uint32_t)buf[1];
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}
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inline void uint16_to_uint8(uint16_t i, uint8_t *buf)
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{
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buf[0] = (i >> 8) & 0xFF;
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buf[1] = i & 0xFF;
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}
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}//namespace
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#endif
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