rte_gtp.h

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/* SPDX-License-Identifier: BSD-3-Clause
 * Copyright(c) 1982, 1986, 1990, 1993
 *      The Regents of the University of California.
 * Copyright(c) 2010-2014 Intel Corporation.
 * All rights reserved.
 */

#ifndef _RTE_GTP_H_
#define _RTE_GTP_H_

#include <stdint.h>
#include <rte_byteorder.h>

__extension__
struct rte_gtp_hdr {
    union {
        uint8_t gtp_hdr_info; 
        struct {
#if RTE_BYTE_ORDER == RTE_LITTLE_ENDIAN
            uint8_t pn:1;   
            uint8_t s:1;    
            uint8_t e:1;    
            uint8_t res1:1; 
            uint8_t pt:1;   
            uint8_t ver:3;  
#elif RTE_BYTE_ORDER == RTE_BIG_ENDIAN
            uint8_t ver:3;  
            uint8_t pt:1;   
            uint8_t res1:1; 
            uint8_t e:1;    
            uint8_t s:1;    
            uint8_t pn:1;   
#endif
        };
    };
    uint8_t msg_type;     
    rte_be16_t plen;      
    rte_be32_t teid;      
} __rte_packed;

/* Optional word of GTP header, present if any of E, S, PN is set. */
struct rte_gtp_hdr_ext_word {
    rte_be16_t sqn;       
    uint8_t npdu;         
    uint8_t next_ext;     
}  __rte_packed;

__extension__
struct rte_gtp_psc_generic_hdr {
    uint8_t ext_hdr_len;    
#if RTE_BYTE_ORDER == RTE_BIG_ENDIAN
    uint8_t type:4;     
    uint8_t qmp:1;      
    uint8_t pad:3;      
    uint8_t spare:2;    
    uint8_t qfi:6;      
#else
    uint8_t pad:3;      
    uint8_t qmp:1;      
    uint8_t type:4;     
    uint8_t qfi:6;      
    uint8_t spare:2;    
#endif
    uint8_t data[0];    
} __rte_packed;

__extension__
struct rte_gtp_psc_type0_hdr {
    uint8_t ext_hdr_len;    
#if RTE_BYTE_ORDER == RTE_BIG_ENDIAN
    uint8_t type:4;     
    uint8_t qmp:1;      
    uint8_t snp:1;      
    uint8_t spare_dl1:2;    
    uint8_t ppp:1;      
    uint8_t rqi:1;      
    uint8_t qfi:6;      
#else
    uint8_t spare_dl1:2;    
    uint8_t snp:1;      
    uint8_t qmp:1;      
    uint8_t type:4;     
    uint8_t qfi:6;      
    uint8_t rqi:1;      
    uint8_t ppp:1;      
#endif
    uint8_t data[0];    
} __rte_packed;

__extension__
struct rte_gtp_psc_type1_hdr {
    uint8_t ext_hdr_len;    
#if RTE_BYTE_ORDER == RTE_BIG_ENDIAN
    uint8_t type:4;     
    uint8_t qmp:1;      
    uint8_t dl_delay_ind:1; 
    uint8_t ul_delay_ind:1; 
    uint8_t snp:1;      
    uint8_t n_delay_ind:1;  
    uint8_t spare_ul2:1;    
    uint8_t qfi:6;      
#else
    uint8_t snp:1;      
    uint8_t ul_delay_ind:1; 
    uint8_t dl_delay_ind:1; 
    uint8_t qmp:1;      
    uint8_t type:4;     
    uint8_t qfi:6;      
    uint8_t spare_ul2:1;    
    uint8_t n_delay_ind:1;  
#endif
    uint8_t data[0];    
} __rte_packed;

#define RTE_ETHER_GTP_HLEN \
    (sizeof(struct rte_udp_hdr) + sizeof(struct rte_gtp_hdr))
/* GTP next protocol type */
#define RTE_GTP_TYPE_IPV4 0x40 
#define RTE_GTP_TYPE_IPV6 0x60 
/* GTP destination port number */
#define RTE_GTPC_UDP_PORT 2123 
#define RTE_GTPU_UDP_PORT 2152 
#endif /* RTE_GTP_H_ */