39e9428b90
Type: feature Add a new plugin to support HA using VRRPv3 (RFC 5798). Change-Id: Iaa2c37e6172f8f41e9165f178f44d481f6e247b9 Signed-off-by: Matthew Smith <mgsmith@netgate.com>
59 lines
1.5 KiB
C
59 lines
1.5 KiB
C
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/*
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* vrrp_packet.h - vrrp protocol/packet definitions
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*
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* Copyright 2019-2020 Rubicon Communications, LLC (Netgate)
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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*/
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#ifndef __included_vrrp_packet_h__
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#define __included_vrrp_packet_h__
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#include <vnet/vnet.h>
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typedef CLIB_PACKED (struct
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{
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/* 4 bits for version (always 2 or 3), 4 bits for type (always 1) */
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u8 vrrp_version_and_type;
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/* VR ID */
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u8 vr_id;
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/* priority of sender on this VR. value of 0 means a master is abdicating */
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u8 priority;
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/* count of addresses being backed up by the VR */
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u8 n_addrs;
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/* max advertisement interval - first 4 bits are reserved and must be 0 */
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u16 rsvd_and_max_adv_int;
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/* checksum */
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u16 checksum;
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}) vrrp_header_t;
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typedef CLIB_PACKED (struct
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{
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ip4_header_t ip4; vrrp_header_t vrrp;
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}) ip4_and_vrrp_header_t;
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typedef CLIB_PACKED (struct
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{
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ip6_header_t ip6; vrrp_header_t vrrp;
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}) ip6_and_vrrp_header_t;
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/* the high 4 bits of the advertisement interval are "reserved" and
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* should be ignored on reception. swap byte order and mask out those bits.
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*/
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always_inline u16
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vrrp_adv_int_from_packet (vrrp_header_t * pkt)
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{
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return clib_net_to_host_u16 (pkt->rsvd_and_max_adv_int) & ((u16) 0x0fff);
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}
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#endif /* __included_vrrp_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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