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/*
* Copyright (c) 2015 Cisco 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.
*/
/**
* @file
* @brief VXLAN GPE packet header structure
*
*/
#ifndef included_vxlan_gpe_packet_h
#define included_vxlan_gpe_packet_h
/**
* From draft-quinn-vxlan-gpe-03.txt
*
* 0 1 2 3
* 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* |R|R|R|R|I|P|R|O|Ver| Reserved |Next Protocol |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | VXLAN Network Identifier (VNI) | Reserved |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
*
* I Bit: Flag bit 4 indicates that the VNI is valid.
*
* P Bit: Flag bit 5 is defined as the Next Protocol bit. The P bit
* MUST be set to 1 to indicate the presence of the 8 bit next
* protocol field.
*
* O Bit: Flag bit 7 is defined as the O bit. When the O bit is set to 1,
*
* the packet is an OAM packet and OAM processing MUST occur. The OAM
* protocol details are out of scope for this document. As with the
* P-bit, bit 7 is currently a reserved flag in VXLAN.
*
* VXLAN-gpe bits 8 and 9 are defined as version bits. These bits are
* reserved in VXLAN. The version field is used to ensure backward
* compatibility going forward with future VXLAN-gpe updates.
*
* The initial version for VXLAN-gpe is 0.
*
* This draft defines the following Next Protocol values:
*
* 0x1 : IPv4
* 0x2 : IPv6
* 0x3 : Ethernet
* 0x4 : Network Service Header [NSH]
*/
/**
* @brief VXLAN GPE support inner protocol definition.
* 1 - IP4
* 2 - IP6
* 3 - ETHERNET
* 4 - NSH
*/
#define foreach_vxlan_gpe_protocol \
_ (0x01, IP4) \
_ (0x02, IP6) \
_ (0x03, ETHERNET) \
_ (0x04, NSH) \
_ (0x05, IOAM)
/**
* @brief Struct for VXLAN GPE support inner protocol definition.
* 1 - IP4
* 2 - IP6
* 3 - ETHERNET
* 4 - NSH
* 5 - IOAM
*/
typedef enum {
#define _(n,f) VXLAN_GPE_PROTOCOL_##f = n,
foreach_vxlan_gpe_protocol
#undef _
VXLAN_GPE_PROTOCOL_MAX,
} vxlan_gpe_protocol_t;
/**
* @brief VXLAN GPE Header definition
*/
typedef struct {
u8 flags;
/** Version and Reserved */
u8 ver_res;
/** Reserved */
u8 res;
/** see vxlan_gpe_protocol_t */
u8 protocol;
/** VNI and Reserved */
u32 vni_res;
} vxlan_gpe_header_t;
#define VXLAN_GPE_FLAGS_I 0x08
#define VXLAN_GPE_FLAGS_P 0x04
#define VXLAN_GPE_FLAGS_O 0x01
#define VXLAN_GPE_VERSION 0x0
#endif /* included_vxlan_gpe_packet_h */
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