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Marco Varleseb598f1d2017-09-19 14:25:28 +02001/*
2 * Copyright (c) 2017 SUSE LLC.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16#ifndef included_vnet_geneve_packet_h
17#define included_vnet_geneve_packet_h
18
19/*
20 *
21 * As per draft https://tools.ietf.org/html/draft-ietf-nvo3-geneve-05
22 *
23 * Section 3.5
24 *
25 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
26 * | Option Class | Type |R|R|R| Length |
27 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
28 * | Variable Option Data |
29 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
30 */
31#define GENEVE_MAX_OPT_LENGTH 128
32
33/*
34 *
35 * As per draft https://tools.ietf.org/html/draft-ietf-nvo3-geneve-05
36 *
37 * Section 7
38 *
39 * +----------------+--------------------------------------+
40 * | Option Class | Description |
41 * +----------------+--------------------------------------+
42 * | 0x0000..0x00FF | Unassigned - IETF Review |
43 * | 0x0100 | Linux |
44 * | 0x0101 | Open vSwitch |
45 * | 0x0102 | Open Virtual Networking (OVN) |
46 * | 0x0103 | In-band Network Telemetry (INT) |
47 * | 0x0104 | VMware |
48 * | 0x0105..0xFFEF | Unassigned - First Come First Served |
49 * | 0xFFF0..FFFF | Experimental |
50 * +----------------+--------------------------------------+
51*/
52#define LINUX_OPT_CLASS 0x0100
53#define OVS_OPT_CLASS 0x0101
54#define OVN_OPT_CLASS 0x0102
55#define INT_OPT_CLASS 0x0103
56#define VMWARE_OPT_CLASS 0x0104
57
Marco Varlese60d48bb2017-11-20 09:20:38 +010058/*
59 * 0 1 2 3
60 * 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
61 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
62 * | Option Class | Type |R|R|R| Length |
63 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
64 * | Variable Option Data |
65 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
66 */
Marco Varleseb598f1d2017-09-19 14:25:28 +020067typedef struct
68{
69 u16 opt_class;
70 u8 type;
Marco Varlese60d48bb2017-11-20 09:20:38 +010071 /* The 3 reserved bits are for future use;
72 * Need to be 0 on sending and ignored on receipt.
73 */
74 u8 res;
75 /* Length is expressed in 4-bytes multiples excluding the options header. */
76 u8 length;
Marco Varleseb598f1d2017-09-19 14:25:28 +020077 u32 opt_data[];
78} geneve_options_t;
79
80/*
81 *
82 * As per draft https://tools.ietf.org/html/draft-ietf-nvo3-geneve-05
83 *
84 * Section 3/3.4
85 *
86 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
87 * |Ver| Opt Len |O|C| Rsvd. | Protocol Type |
88 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
89 * | Virtual Network Identifier (VNI) | Reserved |
90 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
91 * | Variable Length Options |
92 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
93 *
94 */
95#define GENEVE_BASE_HEADER_LENGTH 8 // GENEVE BASE HEADER in bytes
96#define GENEVE_MAX_TOTAL_HDR_LENGTH 260
97
98#define GENEVE_VERSION 0
99#define GENEVE_ETH_PROTOCOL 0x6558
100
101typedef struct
102{
Marco Varlese60d48bb2017-11-20 09:20:38 +0100103 /*
104 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
105 * |Ver| Opt Len |O|C| Rsvd. | Protocol Type |
106 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
107 */
108 u32 first_word;
109
110 /*
111 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
112 * | Virtual Network Identifier (VNI) | Reserved |
113 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
114 */
115 u32 vni_rsvd;
Marco Varleseb598f1d2017-09-19 14:25:28 +0200116 geneve_options_t opts[];
117} geneve_header_t;
118
Marco Varlese60d48bb2017-11-20 09:20:38 +0100119#define GENEVE_VERSION_SHIFT 30
120#define GENEVE_OPTLEN_SHIFT 24
121#define GENEVE_O_BIT_SHIFT 23
122#define GENEVE_C_BIT_SHIFT 22
123#define GENEVE_6_RESERVED_SHIFT 16
124#define GENEVE_VNI_SHIFT 8
125
126#define GENEVE_VERSION_MASK 0xC0000000
127#define GENEVE_OPTLEN_MASK 0x3F000000
128#define GENEVE_O_BIT_MASK 0x00800000
129#define GENEVE_C_BIT_MASK 0x00400000
130#define GENEVE_6_RESERVED_MASK 0x003F0000
131#define GENEVE_PROTOCOL_MASK 0x0000FFFF
132#define GENEVE_VNI_MASK 0xFFFFFF00
133
134/*
135 * Return the VNI in host-byte order
136 */
Marco Varleseb598f1d2017-09-19 14:25:28 +0200137static inline u32
138vnet_get_geneve_vni (geneve_header_t * h)
139{
Neale Ranns91fd9102020-04-03 07:46:28 +0000140 return ((clib_net_to_host_u32 (h->vni_rsvd) & GENEVE_VNI_MASK) >>
Marco Varlese60d48bb2017-11-20 09:20:38 +0100141 GENEVE_VNI_SHIFT);
142}
143
Marco Varlese60d48bb2017-11-20 09:20:38 +0100144static inline u32
Neale Ranns91fd9102020-04-03 07:46:28 +0000145vnet_get_geneve_vni_network_order (geneve_header_t * h)
Marco Varlese60d48bb2017-11-20 09:20:38 +0100146{
Neale Ranns91fd9102020-04-03 07:46:28 +0000147 return (h->vni_rsvd & clib_net_to_host_u32 (GENEVE_VNI_MASK));
Marco Varleseb598f1d2017-09-19 14:25:28 +0200148}
149
150static inline void
151vnet_set_geneve_vni (geneve_header_t * h, u32 vni)
152{
Marco Varlese60d48bb2017-11-20 09:20:38 +0100153 h->vni_rsvd &= ~(GENEVE_VNI_MASK);
154 h->vni_rsvd |=
155 clib_host_to_net_u32 ((vni << GENEVE_VNI_SHIFT) & GENEVE_VNI_MASK);
Marco Varleseb598f1d2017-09-19 14:25:28 +0200156}
157
158static inline u8
159vnet_get_geneve_version (geneve_header_t * h)
160{
Marco Varlese60d48bb2017-11-20 09:20:38 +0100161 return ((h->first_word & GENEVE_VERSION_MASK) >> GENEVE_VERSION_SHIFT);
Marco Varleseb598f1d2017-09-19 14:25:28 +0200162}
163
164static inline void
165vnet_set_geneve_version (geneve_header_t * h, u8 version)
166{
Marco Varlese60d48bb2017-11-20 09:20:38 +0100167 h->first_word &= ~(GENEVE_VERSION_MASK);
168 h->first_word |= ((version << GENEVE_VERSION_SHIFT) & GENEVE_VERSION_MASK);
Marco Varleseb598f1d2017-09-19 14:25:28 +0200169}
170
171static inline u8
172vnet_get_geneve_options_len (geneve_header_t * h)
173{
Marco Varlese60d48bb2017-11-20 09:20:38 +0100174 return ((h->first_word & GENEVE_OPTLEN_MASK) >> GENEVE_OPTLEN_SHIFT);
Marco Varleseb598f1d2017-09-19 14:25:28 +0200175}
176
177static inline void
178vnet_set_geneve_options_len (geneve_header_t * h, u8 len)
179{
Marco Varlese60d48bb2017-11-20 09:20:38 +0100180 h->first_word &= ~(GENEVE_OPTLEN_MASK);
181 h->first_word |= ((len << GENEVE_OPTLEN_SHIFT) & GENEVE_OPTLEN_MASK);
Marco Varleseb598f1d2017-09-19 14:25:28 +0200182}
183
184static inline u8
185vnet_get_geneve_oamframe_bit (geneve_header_t * h)
186{
Marco Varlese60d48bb2017-11-20 09:20:38 +0100187 return ((h->first_word & GENEVE_O_BIT_MASK) >> GENEVE_O_BIT_SHIFT);
Marco Varleseb598f1d2017-09-19 14:25:28 +0200188}
189
190static inline void
191vnet_set_geneve_oamframe_bit (geneve_header_t * h, u8 oam)
192{
Marco Varlese60d48bb2017-11-20 09:20:38 +0100193 h->first_word &= ~(GENEVE_O_BIT_MASK);
194 h->first_word |= ((oam << GENEVE_O_BIT_SHIFT) & GENEVE_O_BIT_MASK);
Marco Varleseb598f1d2017-09-19 14:25:28 +0200195}
196
197static inline u8
198vnet_get_geneve_critical_bit (geneve_header_t * h)
199{
Marco Varlese60d48bb2017-11-20 09:20:38 +0100200 return ((h->first_word & GENEVE_C_BIT_MASK) >> GENEVE_C_BIT_SHIFT);
Marco Varleseb598f1d2017-09-19 14:25:28 +0200201}
202
203static inline void
204vnet_set_geneve_critical_bit (geneve_header_t * h, u8 critical_opts)
205{
Marco Varlese60d48bb2017-11-20 09:20:38 +0100206 h->first_word &= ~(GENEVE_C_BIT_MASK);
207 h->first_word |=
208 ((critical_opts << GENEVE_C_BIT_SHIFT) & GENEVE_C_BIT_MASK);
Marco Varleseb598f1d2017-09-19 14:25:28 +0200209}
210
211static inline u16
212vnet_get_geneve_protocol (geneve_header_t * h)
213{
Marco Varlese60d48bb2017-11-20 09:20:38 +0100214 return (h->first_word & GENEVE_PROTOCOL_MASK);
Marco Varleseb598f1d2017-09-19 14:25:28 +0200215}
216
217static inline void
218vnet_set_geneve_protocol (geneve_header_t * h, u16 protocol)
219{
Marco Varlese60d48bb2017-11-20 09:20:38 +0100220 h->first_word &= ~(GENEVE_PROTOCOL_MASK);
221 h->first_word |= (protocol & GENEVE_PROTOCOL_MASK);
Marco Varleseb598f1d2017-09-19 14:25:28 +0200222}
Marco Varlese60d48bb2017-11-20 09:20:38 +0100223
224static inline void
225vnet_geneve_hdr_1word_ntoh (geneve_header_t * h)
226{
227 h->first_word = clib_net_to_host_u32 (h->first_word);
228}
229
230static inline void
231vnet_geneve_hdr_1word_hton (geneve_header_t * h)
232{
233 h->first_word = clib_host_to_net_u32 (h->first_word);
234}
235
Marco Varleseb598f1d2017-09-19 14:25:28 +0200236#endif
237
238/*
239 * fd.io coding-style-patch-verification: ON
240 *
241 * Local Variables:
242 * eval: (c-set-style "gnu")
243 * End:
244 */