Can anyone help me perform dynamic unmarshalling depending on the type of messages received from a diameter client. In the code below, I have to two structures which represent two different messages received by a diameter server. I would like to modify the current code which unmarshals the request to the struct `var req HandleDERRequest` such that the unmarshalling is done dynamically either to the `var req HandleDERRequest` or `var challreq HandleChallRequest`, depending on the received message that matches a particular structure. I have tried to implement with the code below but it not working as it should. All the answers are being return at the same time and this is not what am expecting.
func HandleDER(settings sm.Settings) diam.HandlerFunc { // If received AVP messages are of this struct format, Unmarshal message to this structure type HandleDERRequest struct { SessionID datatype.UTF8String `avp:"Session-Id"` OriginHost datatype.DiameterIdentity `avp:"Origin-Host"` OriginRealm datatype.DiameterIdentity `avp:"Origin-Realm"` DestinationHost datatype.DiameterIdentity `avp:"Destination-Host"` DestinationRealm datatype.DiameterIdentity `avp:"Destination-Realm"` UserName datatype.UTF8String `avp:"User-Name"` AuthSessionState datatype.Enumerated `avp:"Auth-Session-State"` AuthApplicationID datatype.Unsigned32 `avp:"Auth-Application-Id"` AuthRequestType datatype.Enumerated `avp:"Auth-Request-Type"` EAPPayload datatype.OctetString `avp:"EAP-Payload"` RATType datatype.Enumerated `avp:"RAT-Type"` ANID datatype.UTF8String `avp:"ANID"` } // If received AVP messages are of this struct format, Unmarshal message to this structure type HandleChallRequest struct { SessionID datatype.UTF8String `avp:"Session-Id"` OriginHost datatype.DiameterIdentity `avp:"Origin-Host"` OriginRealm datatype.DiameterIdentity `avp:"Origin-Realm"` DestinationHost datatype.DiameterIdentity `avp:"Destination-Host"` DestinationRealm datatype.DiameterIdentity `avp:"Destination-Realm"` EAPPayload datatype.OctetString `avp:"EAP-Payload"` } return func(c diam.Conn, m *diam.Message) { var err error = nil var req HandleDERRequest var code uint32 = diam.Success err = m.Unmarshal(&req) if err != nil { err = fmt.Errorf("Unmarshal failed: %s", err) code = diam.UnableToComply log.Printf("Invalid DER(%d): %s\n", code, err.Error()) } a := m.Answer(code) a.NewAVP(avp.SessionID, avp.Mbit, 0, req.SessionID) a.NewAVP(avp.OriginHost, avp.Mbit, 0, req.DestinationHost) a.NewAVP(avp.OriginRealm, avp.Mbit, 0, req.DestinationRealm) a.NewAVP(avp.OriginStateID, avp.Mbit, 0, settings.OriginStateID) _, err = AKA_Challenge_Request(settings, c, a) if err != nil { log.Printf("Failed to send AAA challenge request: %s", err.Error()) } var challreq HandleChallageRequest err = m.Unmarshal(&challreq) if err != nil { err = fmt.Errorf("Unmarshal failed: %s", err) code = diam.UnableToComply log.Printf("Invalid DER(%d): %s\n", code, err.Error()) } a = m.Answer(code) a.NewAVP(avp.SessionID, avp.Mbit, 0, req.SessionID) a.NewAVP(avp.OriginHost, avp.Mbit, 0, req.DestinationHost) a.NewAVP(avp.OriginRealm, avp.Mbit, 0, req.DestinationRealm) a.NewAVP(avp.OriginStateID, avp.Mbit, 0, settings.OriginStateID) _, err = AKA_Success_Notification(settings, c, a) if err != nil { log.Printf("Failed to send Success Notification: %s", err.Error()) } } } I know there should be an if condition of the return function but I don't know how to start. Please any idea about how to go about it. -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/golang-nuts/ec15b55e-a927-4bc7-a8ea-cc9f172df506%40googlegroups.com.