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/*
* srv6_end.h
*
* Copyright (c) 2019 Arrcus Inc and/or its affiliates.
* Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
*
* 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.
*/
#ifndef __included_srv6_end_h__
#define __included_srv6_end_h__
#include <vnet/vnet.h>
#include <vnet/ip/ip.h>
#include <vnet/srv6/sr.h>
#include <vnet/srv6/sr_packet.h>
#include <vppinfra/error.h>
#include <vppinfra/elog.h>
#define SRV6_GTP_UDP_DST_PORT 2152
#define SRV6_NHTYPE_NONE 0
#define SRV6_NHTYPE_IPV4 1
#define SRV6_NHTYPE_IPV6 2
#define SRV6_NHTYPE_NON_IP 3
#ifndef IP_PROTOCOL_NONE
#define IP_PROTOCOL_NONE 59
#endif
#if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
#define BITALIGN2(A,B) A; B
#define BITALIGN3(A,B,C) A; B; C
#else
#define BITALIGN2(A,B) B; A
#define BITALIGN3(A,B,C) C; B; A
#endif
#define GTPU_EXTHDR_FLAG 0x04
#define GTPU_EXTHDR_PDU_SESSION 0x85
#define SRH_TAG_ECHO_REPLY 0x0008
#define SRH_TAG_ECHO_REQUEST 0x0004
#define SRH_TAG_ERROR_INDICATION 0x0002
#define SRH_TAG_END_MARKER 0x0001
/* *INDENT-OFF* */
typedef struct
{
u16 seq;
u8 npdu_num;
u8 nextexthdr;
} __attribute__ ((packed)) gtpu_exthdr_t;
/* *INDENT-ON* */
/* *INDENT-OFF* */
typedef struct
{
u8 ver_flags;
u8 type;
u16 length; /* length in octets of the payload */
u32 teid;
gtpu_exthdr_t ext[0];
} __attribute__ ((packed)) gtpu_header_t;
/* *INDENT-ON* */
#define GTPU_TYPE_ECHO_REQUEST 1
#define GTPU_TYPE_ECHO_REPLY 2
#define GTPU_TYPE_ERROR_INDICATION 26
#define GTPU_TYPE_END_MARKER 254
#define GTPU_TYPE_GTPU 255
/* *INDENT-OFF* */
typedef struct
{
BITALIGN2 (u8 ppi:3,
u8 spare:5);
u8 padding[3];
} __attribute__ ((packed)) gtpu_paging_policy_t;
/* *INDENT-ON* */
/* *INDENT-OFF* */
typedef struct
{
u8 exthdrlen;
BITALIGN2(u8 type:4,
u8 spare:4);
union {
struct gtpu_qfi_bits {BITALIGN3(u8 p:1,
u8 r:1,
u8 qfi:6);
} bits;
u8 val;
} u;
gtpu_paging_policy_t paging[0];
u8 nextexthdr;
} __attribute__ ((packed)) gtpu_pdu_session_t;
/* *INDENT-ON* */
#define GTPU_PDU_SESSION_P_BIT_MASK 0x80
#define GTPU_PDU_SESSION_R_BIT_MASK 0x40
#define GTPU_PDU_SESSION_QFI_MASK 0x3f
#define SRV6_PDU_SESSION_U_BIT_MASK 0x01
#define SRV6_PDU_SESSION_R_BIT_MASK 0x02
#define SRV6_PDU_SESSION_QFI_MASK 0xfC
/* *INDENT-OFF* */
typedef struct
{
ip4_header_t ip4; /* 20 bytes */
udp_header_t udp; /* 8 bytes */
gtpu_header_t gtpu; /* 8 bytes */
} __attribute__ ((packed)) ip4_gtpu_header_t;
/* *INDENT-ON* */
/* *INDENT-OFF* */
typedef struct
{
ip6_header_t ip6; /* 40 bytes */
udp_header_t udp; /* 8 bytes */
gtpu_header_t gtpu; /* 8 bytes */
} __attribute__ ((packed)) ip6_gtpu_header_t;
/* *INDENT-ON* */
#define GTPU_V1_VER (1<<5)
#define GTPU_PT_GTP (1<<4)
typedef struct srv6_end_gtp6_param_s
{
u8 nhtype;
ip6_address_t sr_prefix;
u32 sr_prefixlen;
} srv6_end_gtp6_param_t;
typedef struct srv6_end_gtp4_param_s
{
u8 nhtype;
ip6_address_t sr_prefix;
u32 sr_prefixlen;
ip6_address_t v6src_prefix;
u32 v6src_prefixlen;
u32 v4src_position;
} srv6_end_gtp4_param_t;
typedef struct srv6_end_main_v4_s
{
vlib_main_t *vlib_main;
vnet_main_t *vnet_main;
u32 end_m_gtp4_e_node_index;
u32 error_node_index;
u32 dst_p_len; // dst prefix len
u32 src_p_len; // src prefix len
ip4_gtpu_header_t cache_hdr;
} srv6_end_main_v4_t;
typedef struct srv6_end_main_v4_decap_s
{
vlib_main_t *vlib_main;
vnet_main_t *vnet_main;
u32 end_m_gtp4_d_node_index;
u32 error_node_index;
ip6_header_t cache_hdr;
} srv6_end_main_v4_decap_t;
extern srv6_end_main_v4_t srv6_end_main_v4;
extern srv6_end_main_v4_decap_t srv6_end_main_v4_decap;
extern vlib_node_registration_t srv6_end_m_gtp4_e;
typedef struct srv6_end_main_v6_s
{
vlib_main_t *vlib_main;
vnet_main_t *vnet_main;
u32 end_m_gtp6_e_node_index;
u32 error_node_index;
ip6_gtpu_header_t cache_hdr;
} srv6_end_main_v6_t;
extern srv6_end_main_v6_t srv6_end_main_v6;
extern vlib_node_registration_t srv6_end_m_gtp6_e;
typedef struct srv6_end_main_v6_decap_s
{
vlib_main_t *vlib_main;
vnet_main_t *vnet_main;
u32 end_m_gtp6_d_node_index;
u32 error_node_index;
ip6_header_t cache_hdr;
} srv6_end_main_v6_decap_t;
extern srv6_end_main_v6_decap_t srv6_end_main_v6_decap;
extern vlib_node_registration_t srv6_end_m_gtp6_d;
typedef struct srv6_end_main_v6_decap_di_s
{
vlib_main_t *vlib_main;
vnet_main_t *vnet_main;
u32 end_m_gtp6_d_di_node_index;
u32 error_node_index;
ip6srv_combo_header_t cache_hdr;
} srv6_end_main_v6_decap_di_t;
extern srv6_end_main_v6_decap_di_t srv6_end_main_v6_decap_di;
extern vlib_node_registration_t srv6_end_m_gtp6_d_di;
#endif /* __included_srv6_end_h__ */
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
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