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freebsd
GitHub Repository: freebsd/freebsd-src
 Path: blob/main/sys/net/if_geneve.h
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/*-

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 * SPDX-License-Identifier: BSD-2-Clause

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 *

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 * Copyright (c) 2025-2026 Pouria Mousavizadeh Tehrani <[email protected]>

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 * All rights reserved.

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 *

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 * Redistribution and use in source and binary forms, with or without

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 * modification, are permitted provided that the following conditions

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 * are met:

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 * 1. Redistributions of source code must retain the above copyright

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 *    notice, this list of conditions and the following disclaimer.

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 * 2. Redistributions in binary form must reproduce the above copyright

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 *    notice, this list of conditions and the following disclaimer in the

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 *    documentation and/or other materials provided with the distribution.

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 *

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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND

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 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

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 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE

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 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

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 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

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 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

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 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

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 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

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 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

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 * SUCH DAMAGE.

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 */

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#ifndef _NET_IF_GENEVE_H_

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#define _NET_IF_GENEVE_H_

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#include <sys/types.h>

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#ifdef _KERNEL

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struct genevehdr {

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#if BYTE_ORDER == LITTLE_ENDIAN

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	uint8_t		geneve_optlen:6,	/* Opt Len */

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			geneve_ver:2;		/* version */

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	uint8_t		geneve_flags:6,		/* GENEVE Flags */

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			geneve_critical:1,	/* critical options present */

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			geneve_control:1;	/* control packets */

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#endif

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#if BYTE_ORDER == BIG_ENDIAN

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	uint8_t		geneve_ver:2,		/* version */

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			geneve_optlen:6;	/* Opt Len */

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	uint8_t		geneve_control:1,	/* control packets */

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			geneve_critical:1,	/* critical options present */

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			geneve_flags:6;		/* GENEVE Flags */

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#endif

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	uint16_t	geneve_proto;	/* protocol type (follows Ethertypes) */

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	uint32_t	geneve_vni;	/* virtual network identifier */

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} __packed;

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struct geneveudphdr {

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	struct udphdr		geneve_udp;

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	struct genevehdr	geneve_hdr;

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} __packed;

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#endif /* _KERNEL */

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struct geneve_params {

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	uint16_t	ifla_proto;

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};

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#define GENEVE_VNI_MAX		(1 << 24)

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#define GENEVE_PROTO_ETHER	0x6558	/* Ethernet */

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#define GENEVE_PROTO_INHERIT	0x0	/* inherit inner layer 3 headers */

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#define GENEVE_UDPPORT		6081

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#endif /* _NET_IF_GENEVE_H_ */

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