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