/*
* 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.
*/
#ifndef __included_vxlan_packet_h__
#define __included_vxlan_packet_h__ 1
/*
* From RFC-7384
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* |R|R|R|R|I|R|R|R| Reserved |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | VXLAN Network Identifier (VNI) | Reserved |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
*
* VXLAN Header: This is an 8-byte field that has:
*
* - Flags (8 bits): where the I flag MUST be set to 1 for a valid
* VXLAN Network ID (VNI). The other 7 bits (designated "R") are
* reserved fields and MUST be set to zero on transmission and
* ignored on receipt.
*
* - VXLAN Segment ID/VXLAN Network Identifier (VNI): this is a
* 24-bit value used to designate the individual VXLAN overlay
* network on which the communicating VMs are situated. VMs in
* different VXLAN overlay networks cannot communicate with each
* other.
*
* - Reserved fields (24 bits and 8 bits): MUST be set to zero on
* transmission and ignored on receipt.
*
*/
typedef struct {
u8 flags;
u8 res1;
u8 res2;
u8 res3;
u32 vni_reserved;
} vxlan_header_t;
#define VXLAN_FLAGS_I 0x08
static inline u32 vnet_get_vni (vxlan_header_t * h)
{
u32 vni_reserved_host_byte_order;
vni_reserved_host_byte_order = clib_net_to_host_u32 (h->vni_reserved);
return vni_reserved_host_byte_order >> 8;
}
static inline void vnet_set_vni_and_flags (vxlan_header_t * h, u32 vni)
{
h->vni_reserved = clib_host_to_net_u32 (vni<<8);
* (u32 *) h = 0;
h->flags = VXLAN_FLAGS_I;
}
#endif /* __included_vxlan_packet_h__ */
