diff options
Diffstat (limited to 'src/plugins/geneve/geneve_packet.h')
| -rw-r--r-- | src/plugins/geneve/geneve_packet.h | 244 |
1 files changed, 244 insertions, 0 deletions
diff --git a/src/plugins/geneve/geneve_packet.h b/src/plugins/geneve/geneve_packet.h new file mode 100644 index 00000000000..a0d0687434c --- /dev/null +++ b/src/plugins/geneve/geneve_packet.h @@ -0,0 +1,244 @@ +/* + * 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); +} + +static inline void +vnet_set_geneve_options_len (geneve_header_t * h, u8 len) +{ + h->first_word &= ~(GENEVE_OPTLEN_MASK); + h->first_word |= ((len << GENEVE_OPTLEN_SHIFT) & 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: + */ |