4b1bacffe3
See https://tools.ietf.org/html/rfc8926 3.4. second paragraph Opt Len Change-Id: I191d835651b2fa64eeb4ec4271497cf3342554be Signed-off-by: Mohammed Hawari <mohammed@hawari.fr> Type: fix
246 lines
7.2 KiB
C
246 lines
7.2 KiB
C
/*
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* Copyright (c) 2017 SUSE LLC.
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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_vnet_geneve_packet_h
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#define included_vnet_geneve_packet_h
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/*
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*
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* As per draft https://tools.ietf.org/html/draft-ietf-nvo3-geneve-05
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*
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* Section 3.5
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*
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | Option Class | Type |R|R|R| Length |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | Variable Option Data |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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*/
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#define GENEVE_MAX_OPT_LENGTH 128
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/*
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*
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* As per draft https://tools.ietf.org/html/draft-ietf-nvo3-geneve-05
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*
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* Section 7
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*
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* +----------------+--------------------------------------+
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* | Option Class | Description |
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* +----------------+--------------------------------------+
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* | 0x0000..0x00FF | Unassigned - IETF Review |
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* | 0x0100 | Linux |
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* | 0x0101 | Open vSwitch |
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* | 0x0102 | Open Virtual Networking (OVN) |
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* | 0x0103 | In-band Network Telemetry (INT) |
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* | 0x0104 | VMware |
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* | 0x0105..0xFFEF | Unassigned - First Come First Served |
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* | 0xFFF0..FFFF | Experimental |
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* +----------------+--------------------------------------+
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*/
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#define LINUX_OPT_CLASS 0x0100
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#define OVS_OPT_CLASS 0x0101
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#define OVN_OPT_CLASS 0x0102
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#define INT_OPT_CLASS 0x0103
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#define VMWARE_OPT_CLASS 0x0104
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/*
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* 0 1 2 3
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* 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
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | Option Class | Type |R|R|R| Length |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | Variable Option Data |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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*/
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typedef struct
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{
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u16 opt_class;
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u8 type;
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/* The 3 reserved bits are for future use;
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* Need to be 0 on sending and ignored on receipt.
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*/
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u8 res;
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/* Length is expressed in 4-bytes multiples excluding the options header. */
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u8 length;
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u32 opt_data[];
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} geneve_options_t;
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/*
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*
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* As per draft https://tools.ietf.org/html/draft-ietf-nvo3-geneve-05
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*
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* Section 3/3.4
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*
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* |Ver| Opt Len |O|C| Rsvd. | Protocol Type |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | Virtual Network Identifier (VNI) | Reserved |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | Variable Length Options |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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*
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*/
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#define GENEVE_BASE_HEADER_LENGTH 8 // GENEVE BASE HEADER in bytes
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#define GENEVE_MAX_TOTAL_HDR_LENGTH 260
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#define GENEVE_VERSION 0
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#define GENEVE_ETH_PROTOCOL 0x6558
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typedef struct
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{
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/*
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* |Ver| Opt Len |O|C| Rsvd. | Protocol Type |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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*/
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u32 first_word;
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/*
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | Virtual Network Identifier (VNI) | Reserved |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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*/
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u32 vni_rsvd;
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geneve_options_t opts[];
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} geneve_header_t;
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#define GENEVE_VERSION_SHIFT 30
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#define GENEVE_OPTLEN_SHIFT 24
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#define GENEVE_O_BIT_SHIFT 23
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#define GENEVE_C_BIT_SHIFT 22
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#define GENEVE_6_RESERVED_SHIFT 16
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#define GENEVE_VNI_SHIFT 8
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#define GENEVE_VERSION_MASK 0xC0000000
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#define GENEVE_OPTLEN_MASK 0x3F000000
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#define GENEVE_O_BIT_MASK 0x00800000
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#define GENEVE_C_BIT_MASK 0x00400000
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#define GENEVE_6_RESERVED_MASK 0x003F0000
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#define GENEVE_PROTOCOL_MASK 0x0000FFFF
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#define GENEVE_VNI_MASK 0xFFFFFF00
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/*
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* Return the VNI in host-byte order
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*/
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static inline u32
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vnet_get_geneve_vni (geneve_header_t * h)
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{
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return ((clib_net_to_host_u32 (h->vni_rsvd) & GENEVE_VNI_MASK) >>
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GENEVE_VNI_SHIFT);
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}
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static inline u32
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vnet_get_geneve_vni_network_order (geneve_header_t * h)
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{
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return (h->vni_rsvd & clib_net_to_host_u32 (GENEVE_VNI_MASK));
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}
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static inline void
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vnet_set_geneve_vni (geneve_header_t * h, u32 vni)
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{
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h->vni_rsvd &= ~(GENEVE_VNI_MASK);
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h->vni_rsvd |=
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clib_host_to_net_u32 ((vni << GENEVE_VNI_SHIFT) & GENEVE_VNI_MASK);
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}
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static inline u8
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vnet_get_geneve_version (geneve_header_t * h)
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{
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return ((h->first_word & GENEVE_VERSION_MASK) >> GENEVE_VERSION_SHIFT);
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}
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static inline void
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vnet_set_geneve_version (geneve_header_t * h, u8 version)
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{
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h->first_word &= ~(GENEVE_VERSION_MASK);
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h->first_word |= ((version << GENEVE_VERSION_SHIFT) & GENEVE_VERSION_MASK);
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}
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static inline u8
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vnet_get_geneve_options_len (geneve_header_t * h)
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{
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return ((h->first_word & GENEVE_OPTLEN_MASK) >> GENEVE_OPTLEN_SHIFT) << 2;
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}
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static inline void
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vnet_set_geneve_options_len (geneve_header_t * h, u8 len)
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{
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ASSERT ((len & 0x3) == 0);
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h->first_word &= ~(GENEVE_OPTLEN_MASK);
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h->first_word |= ((len << (GENEVE_OPTLEN_SHIFT - 2)) & GENEVE_OPTLEN_MASK);
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}
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static inline u8
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vnet_get_geneve_oamframe_bit (geneve_header_t * h)
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{
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return ((h->first_word & GENEVE_O_BIT_MASK) >> GENEVE_O_BIT_SHIFT);
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}
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static inline void
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vnet_set_geneve_oamframe_bit (geneve_header_t * h, u8 oam)
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{
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h->first_word &= ~(GENEVE_O_BIT_MASK);
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h->first_word |= ((oam << GENEVE_O_BIT_SHIFT) & GENEVE_O_BIT_MASK);
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}
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static inline u8
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vnet_get_geneve_critical_bit (geneve_header_t * h)
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{
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return ((h->first_word & GENEVE_C_BIT_MASK) >> GENEVE_C_BIT_SHIFT);
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}
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static inline void
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vnet_set_geneve_critical_bit (geneve_header_t * h, u8 critical_opts)
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{
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h->first_word &= ~(GENEVE_C_BIT_MASK);
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h->first_word |=
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((critical_opts << GENEVE_C_BIT_SHIFT) & GENEVE_C_BIT_MASK);
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}
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static inline u16
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vnet_get_geneve_protocol (geneve_header_t * h)
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{
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return (h->first_word & GENEVE_PROTOCOL_MASK);
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}
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static inline void
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vnet_set_geneve_protocol (geneve_header_t * h, u16 protocol)
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{
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h->first_word &= ~(GENEVE_PROTOCOL_MASK);
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h->first_word |= (protocol & GENEVE_PROTOCOL_MASK);
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}
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static inline void
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vnet_geneve_hdr_1word_ntoh (geneve_header_t * h)
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{
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h->first_word = clib_net_to_host_u32 (h->first_word);
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}
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static inline void
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vnet_geneve_hdr_1word_hton (geneve_header_t * h)
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{
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h->first_word = clib_host_to_net_u32 (h->first_word);
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}
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#endif
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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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