--- /dev/null
+/*
+ *------------------------------------------------------------------
+ * Copyright (c) 2016 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 payload */
+ u32 teid;
+ u16 sequence;
+ u8 pdu_number;
+ u8 next_ext_type;
+} gtpu_header_t;
+
+#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; /* 8 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
+{
+ /* 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;
+} gtpu_tunnel_t;
+
+#define foreach_gtpu_input_next \
+_(DROP, "error-drop") \
+_(L2_INPUT, "l2-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;
+} gtpu_main_t;
+
+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;
+
+u8 *format_gtpu_encap_trace (u8 * s, va_list * args);
+
+typedef struct
+{
+ u8 is_add;
+ u8 is_ip6;
+ 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);
+
+void vnet_int_gtpu_bypass_mode (u32 sw_if_index, u8 is_ip6, u8 is_enable);
+#endif /* included_vnet_gtpu_h */
+
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
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