| /* |
| * 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: |
| */ |