This repository has been archived by the owner on Apr 27, 2020. It is now read-only.
-
Notifications
You must be signed in to change notification settings - Fork 3
/
handler.go
368 lines (309 loc) · 13.4 KB
/
handler.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
package pfcp_handler
import (
"context"
"fmt"
"free5gc/lib/http_wrapper"
"free5gc/lib/openapi/models"
"free5gc/lib/pfcp"
"free5gc/lib/pfcp/pfcpType"
"free5gc/lib/pfcp/pfcpUdp"
"free5gc/src/smf/logger"
"free5gc/src/smf/smf_context"
"free5gc/src/smf/smf_handler/smf_message"
"free5gc/src/smf/smf_pfcp/pfcp_message"
"free5gc/src/smf/smf_producer"
"net/http"
)
func HandlePfcpHeartbeatRequest(msg *pfcpUdp.Message) {
logger.PfcpLog.Warnf("PFCP Heartbeat Request handling is not implemented")
}
func HandlePfcpHeartbeatResponse(msg *pfcpUdp.Message) {
logger.PfcpLog.Warnf("PFCP Heartbeat Response handling is not implemented")
}
func HandlePfcpPfdManagementRequest(msg *pfcpUdp.Message) {
logger.PfcpLog.Warnf("PFCP PFD Management Request handling is not implemented")
}
func HandlePfcpPfdManagementResponse(msg *pfcpUdp.Message) {
logger.PfcpLog.Warnf("PFCP PFD Management Response handling is not implemented")
}
func HandlePfcpAssociationSetupRequest(msg *pfcpUdp.Message) {
req := msg.PfcpMessage.Body.(pfcp.PFCPAssociationSetupRequest)
nodeID := req.NodeID
if nodeID == nil {
logger.PfcpLog.Errorln("pfcp association needs NodeID")
return
}
logger.PfcpLog.Info("Handle PFCP Association Setup Request with NodeID[%s]", nodeID.ResolveNodeIdToIp().String())
upf := smf_context.RetrieveUPFNodeByNodeID(*nodeID)
if upf == nil {
logger.PfcpLog.Errorf("can't find UPF[%s]", nodeID.ResolveNodeIdToIp().String())
return
}
upf.UPIPInfo = *req.UserPlaneIPResourceInformation
// Response with PFCP Association Setup Response
cause := pfcpType.Cause{
CauseValue: pfcpType.CauseRequestAccepted,
}
pfcp_message.SendPfcpAssociationSetupResponse(msg.RemoteAddr, cause)
}
func HandlePfcpAssociationSetupResponse(msg *pfcpUdp.Message) {
req := msg.PfcpMessage.Body.(pfcp.PFCPAssociationSetupResponse)
nodeID := req.NodeID
if req.Cause.CauseValue == pfcpType.CauseRequestAccepted {
if nodeID == nil {
logger.PfcpLog.Errorln("pfcp association needs NodeID")
return
}
upf := smf_context.RetrieveUPFNodeByNodeID(*req.NodeID)
upf.UPFStatus = smf_context.AssociatedSetUpSuccess
if req.UserPlaneIPResourceInformation != nil {
upf.UPIPInfo = *req.UserPlaneIPResourceInformation
logger.PfcpLog.Infof("UPF(%s)[%s] setup association", upf.NodeID.ResolveNodeIdToIp().String(), upf.UPIPInfo.NetworkInstance)
} else {
logger.PfcpLog.Errorln("pfcp association setup response has no UserPlane IP Resource Information")
}
}
}
func HandlePfcpAssociationUpdateRequest(msg *pfcpUdp.Message) {
logger.PfcpLog.Warnf("PFCP Association Update Request handling is not implemented")
}
func HandlePfcpAssociationUpdateResponse(msg *pfcpUdp.Message) {
logger.PfcpLog.Warnf("PFCP Association Update Response handling is not implemented")
}
// Deprecated: PFCP Association Release Request should be initiated by the CP function
func HandlePfcpAssociationReleaseRequest(msg *pfcpUdp.Message) {
pfcpMsg := msg.PfcpMessage.Body.(pfcp.PFCPAssociationReleaseRequest)
var cause pfcpType.Cause
upfNode := smf_context.RetrieveUPFNodeByNodeID(*pfcpMsg.NodeID)
if upfNode != nil {
smf_context.RemoveUPFNodeByNodeId(*pfcpMsg.NodeID)
cause.CauseValue = pfcpType.CauseRequestAccepted
} else {
cause.CauseValue = pfcpType.CauseNoEstablishedPfcpAssociation
}
pfcp_message.SendPfcpAssociationReleaseResponse(msg.RemoteAddr, cause)
}
func HandlePfcpAssociationReleaseResponse(msg *pfcpUdp.Message) {
pfcpMsg := msg.PfcpMessage.Body.(pfcp.PFCPAssociationReleaseResponse)
if pfcpMsg.Cause.CauseValue == pfcpType.CauseRequestAccepted {
smf_context.RemoveUPFNodeByNodeId(*pfcpMsg.NodeID)
}
}
func HandlePfcpVersionNotSupportedResponse(msg *pfcpUdp.Message) {
logger.PfcpLog.Warnf("PFCP Version Not Support Response handling is not implemented")
}
func HandlePfcpNodeReportRequest(msg *pfcpUdp.Message) {
logger.PfcpLog.Warnf("PFCP Node Report Request handling is not implemented")
}
func HandlePfcpNodeReportResponse(msg *pfcpUdp.Message) {
logger.PfcpLog.Warnf("PFCP Node Report Response handling is not implemented")
}
func HandlePfcpSessionSetDeletionRequest(msg *pfcpUdp.Message) {
logger.PfcpLog.Warnf("PFCP Session Set Deletion Request handling is not implemented")
}
func HandlePfcpSessionSetDeletionResponse(msg *pfcpUdp.Message) {
logger.PfcpLog.Warnf("PFCP Session Set Deletion Response handling is not implemented")
}
func HandlePfcpSessionEstablishmentResponse(msg *pfcpUdp.Message) {
rsp := msg.PfcpMessage.Body.(pfcp.PFCPSessionEstablishmentResponse)
SEID := msg.PfcpMessage.Header.SEID
smContext := smf_context.GetSMContextBySEID(SEID)
if rsp.UPFSEID != nil {
UPFSEID := rsp.UPFSEID
smContext.RemoteSEID = UPFSEID.Seid
}
if rsp.Cause.CauseValue == pfcpType.CauseRequestAccepted && smContext.Tunnel.UpfRoot.UPF.NodeID.ResolveNodeIdToIp().Equal(rsp.NodeID.ResolveNodeIdToIp()) {
smNasBuf, _ := smf_context.BuildGSMPDUSessionEstablishmentAccept(smContext)
n2Pdu, _ := smf_context.BuildPDUSessionResourceSetupRequestTransfer(smContext)
n1n2Request := models.N1N2MessageTransferRequest{}
n1n2Request.JsonData = &models.N1N2MessageTransferReqData{
PduSessionId: smContext.PDUSessionID,
N1MessageContainer: &models.N1MessageContainer{
N1MessageClass: "SM",
N1MessageContent: &models.RefToBinaryData{ContentId: "GSM_NAS"},
},
N2InfoContainer: &models.N2InfoContainer{
N2InformationClass: models.N2InformationClass_SM,
SmInfo: &models.N2SmInformation{
PduSessionId: smContext.PDUSessionID,
N2InfoContent: &models.N2InfoContent{
NgapIeType: models.NgapIeType_PDU_RES_SETUP_REQ,
NgapData: &models.RefToBinaryData{
ContentId: "N2SmInformation",
},
},
SNssai: smContext.Snssai,
},
},
}
n1n2Request.BinaryDataN1Message = smNasBuf
n1n2Request.BinaryDataN2Information = n2Pdu
rspData, _, err := smContext.CommunicationClient.N1N2MessageCollectionDocumentApi.N1N2MessageTransfer(context.Background(), smContext.Supi, n1n2Request)
if err != nil {
logger.PfcpLog.Warnf("Send N1N2Transfer failed")
}
if rspData.Cause == models.N1N2MessageTransferCause_N1_MSG_NOT_TRANSFERRED {
logger.PfcpLog.Warnf("%v", rspData.Cause)
}
}
}
func HandlePfcpSessionModificationResponse(msg *pfcpUdp.Message) {
pfcpRsp := msg.PfcpMessage.Body.(pfcp.PFCPSessionModificationResponse)
SEID := msg.PfcpMessage.Header.SEID
seqNum := msg.PfcpMessage.Header.SequenceNumber
HttpResponseQueue := smf_message.RspQueue
if HttpResponseQueue.CheckItemExist(seqNum) {
if pfcpRsp.Cause.CauseValue == pfcpType.CauseRequestAccepted {
resQueueItem := HttpResponseQueue.GetItem(seqNum)
resQueueItem.RspChan <- smf_message.HandlerResponseMessage{HTTPResponse: &resQueueItem.Response}
smContext := smf_context.GetSMContextBySEID(SEID)
if smf_context.SMF_Self().ULCLSupport && smContext.BPManager != nil {
logger.PfcpLog.Infoln("smContext.BPManager")
if smContext.BPManager.BPStatus == smf_context.UnInitialized {
logger.PfcpLog.Infoln("AddPDUSessionAnchorAndULCL")
smf_producer.AddPDUSessionAnchorAndULCL(smContext)
smContext.BPManager.BPStatus = smf_context.HasSendPFCPMsg
}
}
HttpResponseQueue.DeleteItem(seqNum)
//if smContext.SMState == smf_context.PDUSessionInactive {
// smNasBuf, _ := smf_context.BuildGSMPDUSessionEstablishmentAccept(smContext)
// n1n2Request := models.N1N2MessageTransferRequest{}
// n1n2Request.JsonData = &models.N1N2MessageTransferReqData{
// N1MessageContainer: &models.N1MessageContainer{
// N1MessageClass: "SM",
// N1MessageContent: &models.RefToBinaryData{ContentId: "GSM_NAS"},
// },
// }
// n1n2Request.BinaryDataN1Message = smNasBuf
// logger.PfcpLog.Warnf("N1N2 Transfer")
//rspData, _, err := smContext.CommunicationClient.N1N2MessageCollectionDocumentApi.N1N2MessageTransfer(context.Background(), smContext.Supi, n1n2Request)
//if err != nil {
// logger.PfcpLog.Warnf("Send N1N2Transfer failed")
// }
// if rspData.Cause == models.N1N2MessageTransferCause_N1_MSG_NOT_TRANSFERRED {
// logger.PfcpLog.Warnf("%v", rspData.Cause)
// }
// smContext.SMState = smf_context.PDUSessionActive
// }
logger.PfcpLog.Infof("PFCP Session Modification Success[%d]\n", SEID)
} else {
logger.PfcpLog.Infof("PFCP Session Modification Failed[%d]\n", SEID)
}
} else {
logger.PfcpLog.Infof("[PFCP Modification RSP] Can't find corresponding seq num[%d]\n", seqNum)
}
}
func HandlePfcpSessionDeletionResponse(msg *pfcpUdp.Message) {
logger.PfcpLog.Infof("Handle PFCP Session Deletion Response")
pfcpRsp := msg.PfcpMessage.Body.(pfcp.PFCPSessionDeletionResponse)
SEID := msg.PfcpMessage.Header.SEID
seqNum := msg.PfcpMessage.Header.SequenceNumber
HttpResponseQueue := smf_message.RspQueue
smContext := smf_context.GetSMContextBySEID(SEID)
if HttpResponseQueue.CheckItemExist(seqNum) {
resQueueItem := HttpResponseQueue.GetItem(seqNum)
if pfcpRsp.Cause.CauseValue == pfcpType.CauseRequestAccepted {
if smContext == nil {
logger.PfcpLog.Warnf("PFCP Session Deletion Response Found SM Context NULL, Request Rejected")
// TODO fix: SEID should be the value sent by UPF but now the SEID value is from sm context
} else {
resQueueItem.RspChan <- smf_message.HandlerResponseMessage{HTTPResponse: &resQueueItem.Response}
HttpResponseQueue.DeleteItem(seqNum)
logger.PfcpLog.Infof("PFCP Session Deletion Success[%d]\n", SEID)
return
}
}
problemDetail := models.ProblemDetails{
Status: http.StatusInternalServerError,
Cause: "SYSTEM_FAILULE",
}
response := http_wrapper.Response{
Status: int(problemDetail.Status),
}
if resQueueItem.Response.Status == http.StatusOK {
// Update SmContext Request(N1 PDU Session Release Request)
// Send PDU Session Release Reject
errResponse := models.UpdateSmContextErrorResponse{
JsonData: &models.SmContextUpdateError{
Error: &problemDetail,
},
}
buf, _ := smf_context.BuildGSMPDUSessionReleaseReject(smContext)
errResponse.BinaryDataN1SmMessage = buf
errResponse.JsonData.N1SmMsg = &models.RefToBinaryData{ContentId: "PDUSessionReleaseReject"}
response.Body = errResponse
} else {
// Release SmContext Request
response.Body = problemDetail
}
resQueueItem.RspChan <- smf_message.HandlerResponseMessage{HTTPResponse: &response}
logger.PfcpLog.Infof("PFCP Session Deletion Failed[%d]\n", SEID)
} else {
logger.PfcpLog.Infof("[PFCP Deletion RSP] Can't find corresponding seq num[%d]\n", seqNum)
}
}
func HandlePfcpSessionReportRequest(msg *pfcpUdp.Message) {
req := msg.PfcpMessage.Body.(pfcp.PFCPSessionReportRequest)
SEID := msg.PfcpMessage.Header.SEID
smContext := smf_context.GetSMContextBySEID(SEID)
seqFromUPF := msg.PfcpMessage.Header.SequenceNumber
var cause pfcpType.Cause
if smContext == nil {
logger.PfcpLog.Warnf("PFCP Session Report Request Found SM Context NULL, Request Rejected")
cause.CauseValue = pfcpType.CauseRequestRejected
// TODO fix: SEID should be the value sent by UPF but now the SEID value is from sm context
pfcp_message.SendPfcpSessionReportResponse(msg.RemoteAddr, cause, seqFromUPF, SEID)
return
}
if req.ReportType.Dldr {
downlinkDataReport := req.DownlinkDataReport
pdrID := downlinkDataReport.PDRID.RuleId
if downlinkDataReport.DownlinkDataServiceInformation != nil {
logger.PfcpLog.Warnf("PFCP Session Report Request DownlinkDataServiceInformation handling is not implemented")
}
DLPDR := smContext.Tunnel.UpfRoot.DownLinkTunnel.MatchedPDR
if DLPDR.PDRID == pdrID {
// TS 23.502 4.2.3.3 2b. Send Data Notification Ack, SMF->UPF
cause.CauseValue = pfcpType.CauseRequestAccepted
// TODO fix: SEID should be the value sent by UPF but now the SEID value is from sm context
pfcp_message.SendPfcpSessionReportResponse(msg.RemoteAddr, cause, seqFromUPF, SEID)
// TS 23.502 4.2.3.3 3a. Send Namf_Communication_N1N2MessageTransfer Request, SMF->AMF
n2SmBuf, _ := smf_context.BuildPDUSessionResourceSetupRequestTransfer(smContext)
n1n2Request := models.N1N2MessageTransferRequest{}
n1n2Request.JsonData = &models.N1N2MessageTransferReqData{
PduSessionId: smContext.PDUSessionID,
// Temporarily assign SMF itself, TODO: TS 23.502 4.2.3.3 5. Namf_Communication_N1N2TransferFailureNotification
N1n2FailureTxfNotifURI: fmt.Sprintf("%s://%s:%d", smf_context.SMF_Self().URIScheme, smf_context.SMF_Self().HTTPAddress, smf_context.SMF_Self().HTTPPort),
N2InfoContainer: &models.N2InfoContainer{
N2InformationClass: models.N2InformationClass_SM,
SmInfo: &models.N2SmInformation{
PduSessionId: smContext.PDUSessionID,
N2InfoContent: &models.N2InfoContent{
NgapIeType: models.NgapIeType_PDU_RES_SETUP_REQ,
NgapData: &models.RefToBinaryData{
ContentId: "N2SmInformation",
},
},
SNssai: smContext.Snssai,
},
},
}
n1n2Request.BinaryDataN2Information = n2SmBuf
rspData, _, err := smContext.CommunicationClient.N1N2MessageCollectionDocumentApi.N1N2MessageTransfer(context.Background(), smContext.Supi, n1n2Request)
if err != nil {
logger.PfcpLog.Warnf("Send N1N2Transfer failed")
}
if rspData.Cause == models.N1N2MessageTransferCause_ATTEMPTING_TO_REACH_UE {
logger.PfcpLog.Infof("Receive %v, AMF is able to page the UE", rspData.Cause)
}
if rspData.Cause == models.N1N2MessageTransferCause_UE_NOT_RESPONDING {
logger.PfcpLog.Warnf("%v", rspData.Cause)
// TODO: TS 23.502 4.2.3.3 3c. Failure indication
}
}
}
}
func HandlePfcpSessionReportResponse(msg *pfcpUdp.Message) {
logger.PfcpLog.Warnf("PFCP Session Report Response handling is not implemented")
}