Steven Luong
8bd4db5996
per https://jira.fd.io/browse/VPP-2058 Type: improvement Signed-off-by: Steven Luong <sluong@cisco.com> Change-Id: Ica0828de218d25ada2d0d1491e373c3b78179ac1
81 lines
2.3 KiB
C
81 lines
2.3 KiB
C
/*
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* Copyright (c) 2015 Cisco 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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#ifndef __included_vxlan_packet_h__
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#define __included_vxlan_packet_h__ 1
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/*
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* From RFC-7348
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* |R|R|R|R|I|R|R|R| Reserved |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | VXLAN Network Identifier (VNI) | Reserved |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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*
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* VXLAN Header: This is an 8-byte field that has:
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*
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* - Flags (8 bits): where the I flag MUST be set to 1 for a valid
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* VXLAN Network ID (VNI). The other 7 bits (designated "R") are
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* reserved fields and MUST be set to zero on transmission and
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* ignored on receipt.
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*
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* - VXLAN Segment ID/VXLAN Network Identifier (VNI): this is a
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* 24-bit value used to designate the individual VXLAN overlay
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* network on which the communicating VMs are situated. VMs in
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* different VXLAN overlay networks cannot communicate with each
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* other.
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*
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* - Reserved fields (24 bits and 8 bits): MUST be set to zero on
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* transmission and ignored on receipt.
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*
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*/
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typedef struct
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{
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u8 flags;
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u8 res1;
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u8 res2;
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u8 res3;
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u32 vni_reserved;
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} vxlan_header_t;
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#define VXLAN_FLAGS_I 0x08
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static inline u32
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vnet_get_vni (vxlan_header_t * h)
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{
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u32 vni_reserved_host_byte_order;
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vni_reserved_host_byte_order = clib_net_to_host_u32 (h->vni_reserved);
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return vni_reserved_host_byte_order >> 8;
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}
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static inline void
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vnet_set_vni_and_flags (vxlan_header_t * h, u32 vni)
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{
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h->vni_reserved = clib_host_to_net_u32 (vni << 8);
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*(u32 *) h = 0;
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h->flags = VXLAN_FLAGS_I;
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}
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#endif /* __included_vxlan_packet_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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