d6dfd00232
The length in the GTPU header does not specify the length of the payload. It does specify the number of bytes following the fixed part (the first 8 bytes) of the GTPU header (see 3GPP TS 29.060, Sect. 9.3.1). Change-Id: I8ce73df015e1cf1f38d306666962c0058756111c Signed-off-by: Andreas Schultz <andreas.schultz@travelping.com>
270 lines
6.5 KiB
C
270 lines
6.5 KiB
C
/*
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*------------------------------------------------------------------
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* Copyright (c) 2017 Intel and/or its affiliates.
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*------------------------------------------------------------------
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*/
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#ifndef included_vnet_gtpu_h
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#define included_vnet_gtpu_h
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#include <vppinfra/lock.h>
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#include <vppinfra/error.h>
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#include <vppinfra/hash.h>
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#include <vnet/vnet.h>
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#include <vnet/ip/ip.h>
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#include <vnet/l2/l2_input.h>
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#include <vnet/l2/l2_output.h>
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#include <vnet/l2/l2_bd.h>
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#include <vnet/ethernet/ethernet.h>
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#include <vnet/ip/ip4_packet.h>
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#include <vnet/ip/ip6_packet.h>
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#include <vnet/udp/udp.h>
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#include <vnet/dpo/dpo.h>
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#include <vnet/adj/adj_types.h>
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#include <vnet/fib/fib_table.h>
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/**
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* Bits
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* Octets 8 7 6 5 4 3 2 1
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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 Tunnel Endpoint Identifier (1st Octet)
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* 6 Tunnel Endpoint Identifier (2nd Octet)
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* 7 Tunnel Endpoint Identifier (3rd Octet)
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* 8 Tunnel Endpoint Identifier (4th Octet)
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* 9 Sequence Number (1st Octet)1) 4)
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* 10 Sequence Number (2nd Octet)1) 4)
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* 11 N-PDU Number2) 4)
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* 12 Next Extension Header Type3) 4)
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**/
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typedef struct
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{
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u8 ver_flags;
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u8 type;
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u16 length; /* length in octets of the data following the fixed part of the header */
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u32 teid;
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u16 sequence;
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u8 pdu_number;
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u8 next_ext_type;
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} gtpu_header_t;
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#define GTPU_V1_HDR_LEN 8
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#define GTPU_VER_MASK (7<<5)
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#define GTPU_PT_BIT (1<<4)
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#define GTPU_E_BIT (1<<2)
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#define GTPU_S_BIT (1<<1)
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#define GTPU_PN_BIT (1<<0)
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#define GTPU_E_S_PN_BIT (7<<0)
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#define GTPU_V1_VER (1<<5)
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#define GTPU_PT_GTP (1<<4)
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#define GTPU_TYPE_GTPU 255
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/* *INDENT-OFF* */
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typedef CLIB_PACKED(struct
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{
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ip4_header_t ip4; /* 20 bytes */
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udp_header_t udp; /* 8 bytes */
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gtpu_header_t gtpu; /* 8 bytes */
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}) ip4_gtpu_header_t;
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/* *INDENT-ON* */
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/* *INDENT-OFF* */
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typedef CLIB_PACKED(struct
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{
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ip6_header_t ip6; /* 40 bytes */
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udp_header_t udp; /* 8 bytes */
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gtpu_header_t gtpu; /* 8 bytes */
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}) ip6_gtpu_header_t;
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/* *INDENT-ON* */
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/* *INDENT-OFF* */
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typedef CLIB_PACKED
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(struct {
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/*
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* Key fields: ip src and gtpu teid on incoming gtpu packet
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* all fields in NET byte order
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*/
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union {
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struct {
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u32 src;
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u32 teid;
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};
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u64 as_u64;
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};
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}) gtpu4_tunnel_key_t;
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/* *INDENT-ON* */
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/* *INDENT-OFF* */
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typedef CLIB_PACKED
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(struct {
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/*
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* Key fields: ip src and gtpu teid on incoming gtpu packet
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* all fields in NET byte order
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*/
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ip6_address_t src;
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u32 teid;
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}) gtpu6_tunnel_key_t;
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/* *INDENT-ON* */
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typedef struct
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{
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/* Required for pool_get_aligned */
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CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);
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/* Rewrite string */
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u8 *rewrite;
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/* FIB DPO for IP forwarding of gtpu encap packet */
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dpo_id_t next_dpo;
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/* gtpu teid in HOST byte order */
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u32 teid;
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/* tunnel src and dst addresses */
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ip46_address_t src;
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ip46_address_t dst;
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/* mcast packet output intf index (used only if dst is mcast) */
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u32 mcast_sw_if_index;
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/* decap next index */
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u32 decap_next_index;
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/* The FIB index for src/dst addresses */
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u32 encap_fib_index;
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/* vnet intfc index */
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u32 sw_if_index;
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u32 hw_if_index;
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/**
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* Linkage into the FIB object graph
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*/
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fib_node_t node;
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/*
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* The FIB entry for (depending on gtpu tunnel is unicast or mcast)
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* sending unicast gtpu encap packets or receiving mcast gtpu packets
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*/
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fib_node_index_t fib_entry_index;
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adj_index_t mcast_adj_index;
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/**
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* The tunnel is a child of the FIB entry for its destination. This is
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* so it receives updates when the forwarding information for that entry
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* changes.
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* The tunnels sibling index on the FIB entry's dependency list.
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*/
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u32 sibling_index;
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} gtpu_tunnel_t;
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#define foreach_gtpu_input_next \
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_(DROP, "error-drop") \
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_(L2_INPUT, "l2-input") \
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_(IP4_INPUT, "ip4-input") \
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_(IP6_INPUT, "ip6-input" )
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typedef enum
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{
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#define _(s,n) GTPU_INPUT_NEXT_##s,
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foreach_gtpu_input_next
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#undef _
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GTPU_INPUT_N_NEXT,
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} gtpu_input_next_t;
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typedef enum
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{
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#define gtpu_error(n,s) GTPU_ERROR_##n,
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#include <gtpu/gtpu_error.def>
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#undef gtpu_error
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GTPU_N_ERROR,
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} gtpu_input_error_t;
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typedef struct
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{
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/* vector of encap tunnel instances */
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gtpu_tunnel_t *tunnels;
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/* lookup tunnel by key */
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uword *gtpu4_tunnel_by_key; /* keyed on ipv4.dst + teid */
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uword *gtpu6_tunnel_by_key; /* keyed on ipv6.dst + teid */
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/* local VTEP IPs ref count used by gtpu-bypass node to check if
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received gtpu packet DIP matches any local VTEP address */
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uword *vtep4; /* local ip4 VTEPs keyed on their ip4 addr */
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uword *vtep6; /* local ip6 VTEPs keyed on their ip6 addr */
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/* mcast shared info */
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uword *mcast_shared; /* keyed on mcast ip46 addr */
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/* Free vlib hw_if_indices */
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u32 *free_gtpu_tunnel_hw_if_indices;
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/* Mapping from sw_if_index to tunnel index */
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u32 *tunnel_index_by_sw_if_index;
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/**
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* Node type for registering to fib changes.
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*/
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fib_node_type_t fib_node_type;
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/* API message ID base */
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u16 msg_id_base;
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/* convenience */
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vlib_main_t *vlib_main;
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vnet_main_t *vnet_main;
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} gtpu_main_t;
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extern gtpu_main_t gtpu_main;
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extern vlib_node_registration_t gtpu4_input_node;
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extern vlib_node_registration_t gtpu6_input_node;
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extern vlib_node_registration_t gtpu4_encap_node;
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extern vlib_node_registration_t gtpu6_encap_node;
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u8 *format_gtpu_encap_trace (u8 * s, va_list * args);
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typedef struct
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{
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u8 is_add;
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u8 is_ip6;
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ip46_address_t src, dst;
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u32 mcast_sw_if_index;
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u32 encap_fib_index;
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u32 decap_next_index;
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u32 teid;
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} vnet_gtpu_add_del_tunnel_args_t;
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int vnet_gtpu_add_del_tunnel
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(vnet_gtpu_add_del_tunnel_args_t * a, u32 * sw_if_indexp);
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void vnet_int_gtpu_bypass_mode (u32 sw_if_index, u8 is_ip6, u8 is_enable);
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#endif /* included_vnet_gtpu_h */
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/*
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* fd.io coding-style-patch-verification: ON
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*
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* Local Variables:
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* eval: (c-set-style "gnu")
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* End:
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*/
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