forked from contiv/libOpenflow
-
Notifications
You must be signed in to change notification settings - Fork 17
/
nx_match.go
377 lines (308 loc) · 8.52 KB
/
nx_match.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
package openflow15
import (
"encoding/binary"
"errors"
"fmt"
"net"
)
type Uint16Message struct {
Data uint16
}
func newUint16Message(data uint16) *Uint16Message {
return &Uint16Message{Data: data}
}
func (m *Uint16Message) Len() uint16 {
return 2
}
func (m *Uint16Message) MarshalBinary() (data []byte, err error) {
data = make([]byte, m.Len())
binary.BigEndian.PutUint16(data, m.Data)
return
}
func (m *Uint16Message) UnmarshalBinary(data []byte) error {
if len(data) < 2 {
return errors.New("the []byte is too short to unmarshal a full Uint16Message")
}
m.Data = binary.BigEndian.Uint16(data[:2])
return nil
}
type Uint32Message struct {
Data uint32
}
func newUint32Message(data uint32) *Uint32Message {
return &Uint32Message{Data: data}
}
func (m *Uint32Message) Len() uint16 {
return 4
}
func (m *Uint32Message) MarshalBinary() (data []byte, err error) {
data = make([]byte, m.Len())
binary.BigEndian.PutUint32(data, m.Data)
return
}
func (m *Uint32Message) UnmarshalBinary(data []byte) error {
if len(data) < 4 {
return errors.New("the []byte is too short to unmarshal a full Uint32Message")
}
m.Data = binary.BigEndian.Uint32(data[:4])
return nil
}
type ByteArrayField struct {
Data []byte
Length uint8
}
// Len returns the length of ByteArrayField. The length of ByteArrayField should be multiple of 8 byte.
func (m *ByteArrayField) Len() uint16 {
return uint16(m.Length)
}
func (m *ByteArrayField) MarshalBinary() (data []byte, err error) {
data = make([]byte, m.Len())
copy(data, m.Data)
return
}
func (m *ByteArrayField) UnmarshalBinary(data []byte) error {
expectLength := m.Len()
if len(data) < int(expectLength) {
return errors.New("The byte array has wrong size to unmarshal ByteArrayField message")
}
m.Data = data[:expectLength]
return nil
}
type CTStates struct {
data uint32
mask uint32
}
func NewCTStates() *CTStates {
return new(CTStates)
}
// SetNew sets ct_state as "+new".
func (s *CTStates) SetNew() {
s.data |= 1 << 0
s.mask |= 1 << 0
}
// UnsetNew sets ct_state as "-new".
func (s *CTStates) UnsetNew() {
s.data &^= 1 << NX_CT_STATE_NEW_OFS
s.mask |= 1 << NX_CT_STATE_NEW_OFS
}
// SetEst sets ct_state as "+est".
func (s *CTStates) SetEst() {
s.data |= 1 << NX_CT_STATE_EST_OFS
s.mask |= 1 << NX_CT_STATE_EST_OFS
}
// UnsetEst sets ct_state as "-est".
func (s *CTStates) UnsetEst() {
s.data &^= 1 << NX_CT_STATE_EST_OFS
s.mask |= 1 << NX_CT_STATE_EST_OFS
}
// SetRel sets ct_state as "+rel".
func (s *CTStates) SetRel() {
s.data |= 1 << NX_CT_STATE_REL_OFS
s.mask |= 1 << NX_CT_STATE_REL_OFS
}
// UnsetRel sets ct_state as "-rel".
func (s *CTStates) UnsetRel() {
s.data &^= 1 << NX_CT_STATE_REL_OFS
s.mask |= 1 << NX_CT_STATE_REL_OFS
}
// SetRpl sets ct_state as "+rpl".
func (s *CTStates) SetRpl() {
s.data |= 1 << NX_CT_STATE_RPL_OFS
s.mask |= 1 << NX_CT_STATE_RPL_OFS
}
// UnsetRpl sets ct_state as "-rpl".
func (s *CTStates) UnsetRpl() {
s.data &^= 1 << NX_CT_STATE_RPL_OFS
s.mask |= 1 << NX_CT_STATE_RPL_OFS
}
// SetInv sets ct_state as "+inv".
func (s *CTStates) SetInv() {
s.data |= 1 << NX_CT_STATE_INV_OFS
s.mask |= 1 << NX_CT_STATE_INV_OFS
}
// UnsetInv sets ct_state as "-inv".
func (s *CTStates) UnsetInv() {
s.data &^= 1 << NX_CT_STATE_INV_OFS
s.mask |= 1 << NX_CT_STATE_INV_OFS
}
// SetTrk sets ct_state as "+trk".
func (s *CTStates) SetTrk() {
s.data |= 1 << NX_CT_STATE_TRK_OFS
s.mask |= 1 << NX_CT_STATE_TRK_OFS
}
// UnsetTrk sets ct_state as "-trk".
func (s *CTStates) UnsetTrk() {
s.data &^= 1 << NX_CT_STATE_TRK_OFS
s.mask |= 1 << NX_CT_STATE_TRK_OFS
}
// SetSNAT sets ct_state as "+snat".
func (s *CTStates) SetSNAT() {
s.data |= 1 << NX_CT_STATE_SNAT_OFS
s.mask |= 1 << NX_CT_STATE_SNAT_OFS
}
// UnsetSNAT sets ct_state as "-snat".
func (s *CTStates) UnsetSNAT() {
s.data &^= 1 << NX_CT_STATE_SNAT_OFS
s.mask |= 1 << NX_CT_STATE_SNAT_OFS
}
// SetDNAT sets ct_state as "+dnat".
func (s *CTStates) SetDNAT() {
s.data |= 1 << NX_CT_STATE_DNAT_OFS
s.mask |= 1 << NX_CT_STATE_DNAT_OFS
}
// UnsetDNAT sets ct_state as "-dnat".
func (s *CTStates) UnsetDNAT() {
s.data &^= 1 << NX_CT_STATE_DNAT_OFS
s.mask |= 1 << NX_CT_STATE_DNAT_OFS
}
type NXRange struct {
start int
end int
}
func newNXRegHeader(idx int, hasMask bool) *MatchField {
idKey := fmt.Sprintf("NXM_NX_REG%d", idx)
header, _ := FindFieldHeaderByName(idKey, hasMask)
return header
}
// This function will generate a MatchField with continuous reg mask according
// to dataRng. We may need to use NewRegMatchFieldWithMask if we want a discontinuous
// reg mask, such as, 0x5.
func NewRegMatchField(idx int, data uint32, dataRng *NXRange) *MatchField {
var field *MatchField
field = newNXRegHeader(idx, dataRng != nil)
field.Value = newUint32Message(data)
if dataRng != nil {
field.Mask = newUint32Message(dataRng.ToUint32Mask())
}
return field
}
// This function will generate a MatchField with data/mask for Reg[idx]. The mask can
// be arbitrary bitwise, including continuous mask, such as, 0x7 and discontinous
// mask, such as, 0x5.
func NewRegMatchFieldWithMask(idx int, data uint32, mask uint32) *MatchField {
var field *MatchField
field = newNXRegHeader(idx, mask != 0)
field.Value = newUint32Message(data)
if mask != 0 {
field.Mask = newUint32Message(mask)
}
return field
}
func newNXTunMetadataHeader(idx int, hasMask bool) *MatchField {
idKey := fmt.Sprintf("NXM_NX_TUN_METADATA%d", idx)
header, _ := FindFieldHeaderByName(idKey, hasMask)
return header
}
func NewTunMetadataField(idx int, data []byte, mask []byte) *MatchField {
var field *MatchField
field = newNXTunMetadataHeader(idx, len(mask) > 0)
field.Value = &ByteArrayField{
Data: data,
Length: uint8(len(data)),
}
field.Length = uint8(len(data))
if len(mask) > 0 {
field.Mask = &ByteArrayField{
Data: mask,
Length: uint8(len(mask)),
}
field.Length += uint8(len(mask))
}
return field
}
func NewCTStateMatchField(states *CTStates) *MatchField {
field, _ := FindFieldHeaderByName("NXM_NX_CT_STATE", true)
field.Value = newUint32Message(states.data)
field.Mask = newUint32Message(states.mask)
return field
}
func NewCTZoneMatchField(zone uint16) *MatchField {
field, _ := FindFieldHeaderByName("NXM_NX_CT_ZONE", false)
field.Value = newUint16Message(zone)
return field
}
func NewCTMarkMatchField(mark uint32, mask *uint32) *MatchField {
var field *MatchField
field, _ = FindFieldHeaderByName("NXM_NX_CT_MARK", mask != nil)
field.Value = newUint32Message(mark)
if mask != nil {
field.Mask = newUint32Message(*mask)
}
return field
}
type CTLabel struct {
data [16]byte
}
func (m *CTLabel) Len() uint16 {
return uint16(len(m.data))
}
func (m *CTLabel) MarshalBinary() (data []byte, err error) {
data = make([]byte, m.Len())
copy(data, m.data[:])
err = nil
return
}
func (m *CTLabel) UnmarshalBinary(data []byte) error {
m.data = [16]byte{}
if len(data) < len(m.data) {
copy(m.data[:], data)
} else {
copy(m.data[:], data[:16])
}
return nil
}
func newCTLabel(data [16]byte) *CTLabel {
label := new(CTLabel)
_ = label.UnmarshalBinary(data[:16])
return label
}
func NewCTLabelMatchField(label [16]byte, mask *[16]byte) *MatchField {
var field *MatchField
field, _ = FindFieldHeaderByName("NXM_NX_CT_LABEL", mask != nil)
field.Value = newCTLabel(label)
if mask != nil {
field.Mask = newCTLabel(*mask)
}
return field
}
func NewConjIDMatchField(conjID uint32) *MatchField {
field, _ := FindFieldHeaderByName("NXM_NX_CONJ_ID", false)
field.Value = newUint32Message(conjID)
return field
}
func NewNxARPShaMatchField(addr net.HardwareAddr, mask net.HardwareAddr) *MatchField {
var field *MatchField
field, _ = FindFieldHeaderByName("NXM_NX_ARP_SHA", mask != nil)
field.Value = &ArpXHaField{ArpHa: addr}
if mask != nil {
field.Mask = &ArpXHaField{ArpHa: mask}
}
return field
}
func NewNxARPThaMatchField(addr net.HardwareAddr, mask net.HardwareAddr) *MatchField {
var field *MatchField
field, _ = FindFieldHeaderByName("NXM_NX_ARP_THA", mask != nil)
field.Value = &ArpXHaField{ArpHa: addr}
if mask != nil {
field.Mask = &ArpXHaField{ArpHa: mask}
}
return field
}
func NewNxARPSpaMatchField(addr net.IP, mask net.IP) *MatchField {
var field *MatchField
field, _ = FindFieldHeaderByName("NXM_OF_ARP_SPA", mask != nil)
field.Value = &ArpXPaField{ArpPa: addr}
if mask != nil {
field.Mask = &ArpXPaField{ArpPa: mask}
}
return field
}
func NewNxARPTpaMatchField(addr net.IP, mask net.IP) *MatchField {
var field *MatchField
field, _ = FindFieldHeaderByName("NXM_OF_ARP_TPA", mask != nil)
field.Value = &ArpXPaField{ArpPa: addr}
if mask != nil {
field.Mask = &ArpXPaField{ArpPa: mask}
}
return field
}