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/*
*------------------------------------------------------------------
* Copyright (c) 2017 Intel 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_vnet_gtpu_h
#define included_vnet_gtpu_h
#include <vppinfra/lock.h>
#include <vppinfra/error.h>
#include <vppinfra/hash.h>
#include <vnet/vnet.h>
#include <vnet/ip/ip.h>
#include <vnet/l2/l2_input.h>
#include <vnet/l2/l2_output.h>
#include <vnet/l2/l2_bd.h>
#include <vnet/ethernet/ethernet.h>
#include <vnet/ip/ip4_packet.h>
#include <vnet/ip/ip6_packet.h>
#include <vnet/udp/udp.h>
#include <vnet/dpo/dpo.h>
#include <vnet/adj/adj_types.h>
#include <vnet/fib/fib_table.h>
/**
* Bits
* Octets 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 Tunnel Endpoint Identifier (1st Octet)
* 6 Tunnel Endpoint Identifier (2nd Octet)
* 7 Tunnel Endpoint Identifier (3rd Octet)
* 8 Tunnel Endpoint Identifier (4th Octet)
* 9 Sequence Number (1st Octet)1) 4)
* 10 Sequence Number (2nd Octet)1) 4)
* 11 N-PDU Number2) 4)
* 12 Next Extension Header Type3) 4)
**/
typedef struct
{
u8 ver_flags;
u8 type;
u16 length; /* length in octets of the data following the fixed part of the header */
u32 teid;
u16 sequence;
u8 pdu_number;
u8 next_ext_type;
} gtpu_header_t;
#define GTPU_V1_HDR_LEN 8
#define GTPU_VER_MASK (7<<5)
#define GTPU_PT_BIT (1<<4)
#define GTPU_E_BIT (1<<2)
#define GTPU_S_BIT (1<<1)
#define GTPU_PN_BIT (1<<0)
#define GTPU_E_S_PN_BIT (7<<0)
#define GTPU_V1_VER (1<<5)
#define GTPU_PT_GTP (1<<4)
#define GTPU_TYPE_GTPU 255
/* *INDENT-OFF* */
typedef CLIB_PACKED(struct
{
ip4_header_t ip4; /* 20 bytes */
udp_header_t udp; /* 8 bytes */
gtpu_header_t gtpu; /* 12 bytes */
}) ip4_gtpu_header_t;
/* *INDENT-ON* */
/* *INDENT-OFF* */
typedef CLIB_PACKED(struct
{
ip6_header_t ip6; /* 40 bytes */
udp_header_t udp; /* 8 bytes */
gtpu_header_t gtpu; /* 8 bytes */
}) ip6_gtpu_header_t;
/* *INDENT-ON* */
/* *INDENT-OFF* */
typedef CLIB_PACKED
(struct {
/*
* Key fields: ip src and gtpu teid on incoming gtpu packet
* all fields in NET byte order
*/
union {
struct {
u32 src;
u32 teid;
};
u64 as_u64;
};
}) gtpu4_tunnel_key_t;
/* *INDENT-ON* */
/* *INDENT-OFF* */
typedef CLIB_PACKED
(struct {
/*
* Key fields: ip src and gtpu teid on incoming gtpu packet
* all fields in NET byte order
*/
ip6_address_t src;
u32 teid;
}) gtpu6_tunnel_key_t;
/* *INDENT-ON* */
typedef struct
{
/* Required for pool_get_aligned */
CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);
/* Rewrite string */
u8 *rewrite;
/* FIB DPO for IP forwarding of gtpu encap packet */
dpo_id_t next_dpo;
/* gtpu teid in HOST byte order */
u32 teid;
/* tunnel src and dst addresses */
ip46_address_t src;
ip46_address_t dst;
/* mcast packet output intf index (used only if dst is mcast) */
u32 mcast_sw_if_index;
/* decap next index */
u32 decap_next_index;
/* The FIB index for src/dst addresses */
u32 encap_fib_index;
/* vnet intfc index */
u32 sw_if_index;
u32 hw_if_index;
/**
* Linkage into the FIB object graph
*/
fib_node_t node;
/*
* The FIB entry for (depending on gtpu tunnel is unicast or mcast)
* sending unicast gtpu encap packets or receiving mcast gtpu packets
*/
fib_node_index_t fib_entry_index;
adj_index_t mcast_adj_index;
/**
* The tunnel is a child of the FIB entry for its destination. This is
* so it receives updates when the forwarding information for that entry
* changes.
* The tunnels sibling index on the FIB entry's dependency list.
*/
u32 sibling_index;
u32 flow_index; /* infra flow index */
} gtpu_tunnel_t;
#define foreach_gtpu_input_next \
_(DROP, "error-drop") \
_(L2_INPUT, "l2-input") \
_(IP4_INPUT, "ip4-input") \
_(IP6_INPUT, "ip6-input" )
typedef enum
{
#define _(s,n) GTPU_INPUT_NEXT_##s,
foreach_gtpu_input_next
#undef _
GTPU_INPUT_N_NEXT,
} gtpu_input_next_t;
typedef enum
{
#define gtpu_error(n,s) GTPU_ERROR_##n,
#include <gtpu/gtpu_error.def>
#undef gtpu_error
GTPU_N_ERROR,
} gtpu_input_error_t;
typedef struct
{
/* vector of encap tunnel instances */
gtpu_tunnel_t *tunnels;
/* lookup tunnel by key */
uword *gtpu4_tunnel_by_key; /* keyed on ipv4.dst + teid */
uword *gtpu6_tunnel_by_key; /* keyed on ipv6.dst + teid */
/* local VTEP IPs ref count used by gtpu-bypass node to check if
received gtpu packet DIP matches any local VTEP address */
uword *vtep4; /* local ip4 VTEPs keyed on their ip4 addr */
uword *vtep6; /* local ip6 VTEPs keyed on their ip6 addr */
/* mcast shared info */
uword *mcast_shared; /* keyed on mcast ip46 addr */
/* Free vlib hw_if_indices */
u32 *free_gtpu_tunnel_hw_if_indices;
/* Mapping from sw_if_index to tunnel index */
u32 *tunnel_index_by_sw_if_index;
/**
* Node type for registering to fib changes.
*/
fib_node_type_t fib_node_type;
/* API message ID base */
u16 msg_id_base;
/* convenience */
vlib_main_t *vlib_main;
vnet_main_t *vnet_main;
u32 flow_id_start;
} gtpu_main_t;
extern gtpu_main_t gtpu_main;
extern vlib_node_registration_t gtpu4_input_node;
extern vlib_node_registration_t gtpu6_input_node;
extern vlib_node_registration_t gtpu4_encap_node;
extern vlib_node_registration_t gtpu6_encap_node;
extern vlib_node_registration_t gtpu4_flow_input_node;
u8 *format_gtpu_encap_trace (u8 * s, va_list * args);
typedef struct
{
u8 is_add;
ip46_address_t src, dst;
u32 mcast_sw_if_index;
u32 encap_fib_index;
u32 decap_next_index;
u32 teid;
} vnet_gtpu_add_del_tunnel_args_t;
int vnet_gtpu_add_del_tunnel
(vnet_gtpu_add_del_tunnel_args_t * a, u32 * sw_if_indexp);
typedef struct
{
u32 tunnel_index;
u32 teid;
} gtpu_encap_trace_t;
void vnet_int_gtpu_bypass_mode (u32 sw_if_index, u8 is_ip6, u8 is_enable);
u32 vnet_gtpu_get_tunnel_index (u32 sw_if_index);
int vnet_gtpu_add_del_rx_flow (u32 hw_if_index, u32 t_imdex, int is_add);
#endif /* included_vnet_gtpu_h */
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
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