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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
typedef struct
{
u16 opt_class;
u8 type;
u8 res:3;
u8 length:5;
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
{
u8 ver:2;
u8 opt_len:6;
u8 oam_frame:1;
u8 critical_options:1;
u8 res1:6;
u16 protocol;
u32 vni:24;
u8 res2;
geneve_options_t opts[];
} geneve_header_t;
static inline u32
vnet_get_geneve_vni (geneve_header_t * h)
{
return (clib_net_to_host_u32 (h->vni) >> 8);
}
static inline void
vnet_set_geneve_vni (geneve_header_t * h, u32 vni)
{
h->vni = clib_host_to_net_u32 (vni << 8);
}
static inline u8
vnet_get_geneve_version (geneve_header_t * h)
{
return (clib_net_to_host_u32 (h->ver) >> 30);
}
static inline void
vnet_set_geneve_version (geneve_header_t * h, u8 version)
{
h->ver = clib_host_to_net_u32 (version << 30);
}
static inline u8
vnet_get_geneve_options_len (geneve_header_t * h)
{
return (clib_net_to_host_u32 (h->opt_len) >> 24);
}
static inline void
vnet_set_geneve_options_len (geneve_header_t * h, u8 len)
{
h->opt_len = clib_host_to_net_u32 (len << 24);
}
static inline u8
vnet_get_geneve_oamframe_bit (geneve_header_t * h)
{
return (clib_net_to_host_u32 (h->oam_frame) >> 23);
}
static inline void
vnet_set_geneve_oamframe_bit (geneve_header_t * h, u8 oam)
{
h->oam_frame = clib_host_to_net_u32 (oam << 23);
}
static inline u8
vnet_get_geneve_critical_bit (geneve_header_t * h)
{
return (clib_net_to_host_u32 (h->critical_options) >> 22);
}
static inline void
vnet_set_geneve_critical_bit (geneve_header_t * h, u8 critical_opts)
{
h->critical_options = clib_host_to_net_u32 (critical_opts << 22);
}
static inline u16
vnet_get_geneve_protocol (geneve_header_t * h)
{
return clib_net_to_host_u32 (h->protocol);
}
static inline void
vnet_set_geneve_protocol (geneve_header_t * h, u16 protocol)
{
h->protocol = clib_host_to_net_u32 (protocol);
}
#endif
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
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