HandleKnockRequest Server will respond with success or error with NHP_ACK message
(ppd *core.PacketParserData)
| 12 | // HandleKnockRequest |
| 13 | // Server will respond with success or error with NHP_ACK message |
| 14 | func (s *UdpServer) HandleKnockRequest(ppd *core.PacketParserData) (err error) { |
| 15 | defer s.wg.Done() |
| 16 | s.wg.Add(1) |
| 17 | |
| 18 | transactionId := ppd.SenderTrxId |
| 19 | // For relay-forwarded connections, use the real client address |
| 20 | // (the browser behind the relay) for auth and logging. |
| 21 | clientAddr := ppd.ConnData.RemoteAddr |
| 22 | if ppd.ConnData.RealRemoteAddr != nil { |
| 23 | clientAddr = ppd.ConnData.RealRemoteAddr |
| 24 | } |
| 25 | addrStr := clientAddr.String() |
| 26 | knkMsg := &common.AgentKnockMsg{} |
| 27 | dhpKnkMsg := &common.DHPKnockMsg{} |
| 28 | ackMsg := &common.ServerKnockAckMsg{ |
| 29 | AgentAddr: addrStr, // optional, to tell agent its own outwards ip address |
| 30 | } |
| 31 | dhpAckMsg := &common.ServerDHPKnockAckMsg{ |
| 32 | OpenTime: 30, // currently, use fixed value, unit is seconds. |
| 33 | } |
| 34 | |
| 35 | func() { |
| 36 | // parse knockMsg |
| 37 | if ppd.HeaderType == core.DHP_KNK { // dhp knock |
| 38 | err = json.Unmarshal(ppd.BodyMessage, dhpKnkMsg) |
| 39 | } else { |
| 40 | err = json.Unmarshal(ppd.BodyMessage, knkMsg) |
| 41 | } |
| 42 | |
| 43 | if err != nil { |
| 44 | log.Error("server-agent(#%d@%s)[HandleKnockRequest] failed to parse %s message: %v", transactionId, addrStr, core.HeaderTypeToString(ppd.HeaderType), err) |
| 45 | ackMsg.ErrCode = common.ErrJsonParseFailed.ErrorCode() |
| 46 | ackMsg.ErrMsg = err.Error() |
| 47 | return |
| 48 | } |
| 49 | |
| 50 | // dhp knock |
| 51 | if ppd.HeaderType == core.DHP_KNK { |
| 52 | log.Info("server-agent(%s#%d@%s)[HandleKnockRequest] start to verify evidence for dhp knock", knkMsg.UserId, transactionId, addrStr) |
| 53 | if s.AppraiseEvidence(dhpKnkMsg.Evidence) { |
| 54 | dhpAckMsg.ErrCode = common.ErrSuccess.ErrorCode() |
| 55 | } else { |
| 56 | dhpAckMsg.ErrCode = common.ErrEvidenceAppraisalFailed.ErrorCode() |
| 57 | } |
| 58 | return |
| 59 | } |
| 60 | |
| 61 | // determine knock type |
| 62 | knkMsg.HeaderType = ppd.HeaderType |
| 63 | |
| 64 | // find out auth service provider |
| 65 | aspData := s.FindAuthSvcProvider(knkMsg.AuthServiceId) |
| 66 | if aspData == nil { |
| 67 | err = common.ErrAuthServiceProviderNotFound |
| 68 | ackMsg.ErrCode = common.ErrAuthServiceProviderNotFound.ErrorCode() |
| 69 | ackMsg.ErrMsg = err.Error() |
| 70 | return |
| 71 | } |
no test coverage detected