1 /* SPDX-License-Identifier: BSD-3-Clause 2 * Copyright(c) 1982, 1986, 1990, 1993 3 * The Regents of the University of California. 4 * Copyright(c) 2010-2014 Intel Corporation. 5 * All rights reserved. 6 */ 7 8 #ifndef _RTE_GTP_H_ 9 #define _RTE_GTP_H_ 10 11 /** 12 * @file 13 * 14 * GTP-related defines 15 */ 16 17 #include <stdint.h> 18 #include <rte_byteorder.h> 19 20 #ifdef __cplusplus 21 extern "C" { 22 #endif 23 24 /** 25 * Simplified GTP protocol header. 26 * Contains 8-bit header info, 8-bit message type, 27 * 16-bit payload length after mandatory header, 32-bit TEID. 28 * No optional fields and next extension header. 29 */ 30 __extension__ 31 struct rte_gtp_hdr { 32 union { 33 uint8_t gtp_hdr_info; /**< GTP header info */ 34 struct { 35 #if RTE_BYTE_ORDER == RTE_LITTLE_ENDIAN 36 uint8_t pn:1; /**< N-PDU Number present bit */ 37 uint8_t s:1; /**< Sequence Number Present bit */ 38 uint8_t e:1; /**< Extension Present bit */ 39 uint8_t res1:1; /**< Reserved */ 40 uint8_t pt:1; /**< Protocol Type bit */ 41 uint8_t ver:3; /**< Version Number */ 42 #elif RTE_BYTE_ORDER == RTE_BIG_ENDIAN 43 uint8_t ver:3; /**< Version Number */ 44 uint8_t pt:1; /**< Protocol Type bit */ 45 uint8_t res1:1; /**< Reserved */ 46 uint8_t e:1; /**< Extension Present bit */ 47 uint8_t s:1; /**< Sequence Number Present bit */ 48 uint8_t pn:1; /**< N-PDU Number present bit */ 49 #endif 50 }; 51 }; 52 uint8_t msg_type; /**< GTP message type */ 53 rte_be16_t plen; /**< Total payload length */ 54 rte_be32_t teid; /**< Tunnel endpoint ID */ 55 } __rte_packed; 56 57 /* Optional word of GTP header, present if any of E, S, PN is set. */ 58 struct rte_gtp_hdr_ext_word { 59 rte_be16_t sqn; /**< Sequence Number. */ 60 uint8_t npdu; /**< N-PDU number. */ 61 uint8_t next_ext; /**< Next Extension Header Type. */ 62 } __rte_packed; 63 64 /** 65 * Optional extension for GTP with next_ext set to 0x85 66 * defined based on RFC 38415-g30. 67 */ 68 __extension__ 69 struct rte_gtp_psc_generic_hdr { 70 uint8_t ext_hdr_len; /**< PDU ext hdr len in multiples of 4 bytes */ 71 #if RTE_BYTE_ORDER == RTE_BIG_ENDIAN 72 uint8_t type:4; /**< PDU type */ 73 uint8_t qmp:1; /**< Qos Monitoring Packet */ 74 uint8_t pad:3; /**< type specific pad bits */ 75 uint8_t spare:2; /**< type specific spare bits */ 76 uint8_t qfi:6; /**< Qos Flow Identifier */ 77 #else 78 uint8_t qfi:6; /**< Qos Flow Identifier */ 79 uint8_t spare:2; /**< type specific spare bits */ 80 uint8_t pad:3; /**< type specific pad bits */ 81 uint8_t qmp:1; /**< Qos Monitoring Packet */ 82 uint8_t type:4; /**< PDU type */ 83 #endif 84 uint8_t data[0]; /**< variable length data fields */ 85 } __rte_packed; 86 87 /** 88 * Optional extension for GTP with next_ext set to 0x85 89 * type0 defined based on RFC 38415-g30 90 */ 91 __extension__ 92 struct rte_gtp_psc_type0_hdr { 93 uint8_t ext_hdr_len; /**< PDU ext hdr len in multiples of 4 bytes */ 94 #if RTE_BYTE_ORDER == RTE_BIG_ENDIAN 95 uint8_t type:4; /**< PDU type */ 96 uint8_t qmp:1; /**< Qos Monitoring Packet */ 97 uint8_t snp:1; /**< Sequence number presence */ 98 uint8_t spare_dl1:2; /**< spare down link bits */ 99 uint8_t ppp:1; /**< Paging policy presence */ 100 uint8_t rqi:1; /**< Reflective Qos Indicator */ 101 uint8_t qfi:6; /**< Qos Flow Identifier */ 102 #else 103 uint8_t qfi:6; /**< Qos Flow Identifier */ 104 uint8_t rqi:1; /**< Reflective Qos Indicator */ 105 uint8_t ppp:1; /**< Paging policy presence */ 106 uint8_t spare_dl1:2; /**< spare down link bits */ 107 uint8_t snp:1; /**< Sequence number presence */ 108 uint8_t type:4; /**< PDU type */ 109 #endif 110 uint8_t data[0]; /**< variable length data fields */ 111 } __rte_packed; 112 113 /** 114 * Optional extension for GTP with next_ext set to 0x85 115 * type1 defined based on RFC 38415-g30 116 */ 117 __extension__ 118 struct rte_gtp_psc_type1_hdr { 119 uint8_t ext_hdr_len; /**< PDU ext hdr len in multiples of 4 bytes */ 120 #if RTE_BYTE_ORDER == RTE_BIG_ENDIAN 121 uint8_t type:4; /**< PDU type */ 122 uint8_t qmp:1; /**< Qos Monitoring Packet */ 123 uint8_t dl_delay_ind:1; /**< dl delay result presence */ 124 uint8_t ul_delay_ind:1; /**< ul delay result presence */ 125 uint8_t snp:1; /**< Sequence number presence ul */ 126 uint8_t n_delay_ind:1; /**< N3/N9 delay result presence */ 127 uint8_t spare_ul2:1; /**< spare up link bits */ 128 uint8_t qfi:6; /**< Qos Flow Identifier */ 129 #else 130 uint8_t qfi:6; /**< Qos Flow Identifier */ 131 uint8_t spare_ul2:1; /**< spare up link bits */ 132 uint8_t n_delay_ind:1; /**< N3/N9 delay result presence */ 133 uint8_t snp:1; /**< Sequence number presence ul */ 134 uint8_t ul_delay_ind:1; /**< ul delay result presence */ 135 uint8_t dl_delay_ind:1; /**< dl delay result presence */ 136 uint8_t qmp:1; /**< Qos Monitoring Packet */ 137 uint8_t type:4; /**< PDU type */ 138 #endif 139 uint8_t data[0]; /**< variable length data fields */ 140 } __rte_packed; 141 142 /** GTP header length */ 143 #define RTE_ETHER_GTP_HLEN \ 144 (sizeof(struct rte_udp_hdr) + sizeof(struct rte_gtp_hdr)) 145 /* GTP next protocal type */ 146 #define RTE_GTP_TYPE_IPV4 0x40 /**< GTP next protocal type IPv4 */ 147 #define RTE_GTP_TYPE_IPV6 0x60 /**< GTP next protocal type IPv6 */ 148 /* GTP destination port number */ 149 #define RTE_GTPC_UDP_PORT 2123 /**< GTP-C UDP destination port */ 150 #define RTE_GTPU_UDP_PORT 2152 /**< GTP-U UDP destination port */ 151 152 #ifdef __cplusplus 153 } 154 #endif 155 156 #endif /* RTE_GTP_H_ */ 157