session_id_mapping.go

// sessionID   - ASPX sessionID returned in this payload
// reqID       - Identifies membership of the same request triple, so
//               so any original response or replayed response responding 
//               to the same request will have the same reqID
// payloadType - One of {request, originalResponse, replayedResponse}, 
//               though requests shouldn't reach this function.
func sessionIDMapping(sessionID, reqID string, payloadType byte) {
    // If this request has already logged an opposite session ID
    if otherSessionID, ok := asyncRequestIDQueue[reqID]; ok {
        switch payloadType { // map original -> replayed
        case payloadOriginalResponse: // if it's the original response
            Debug(fmt.Sprintf("Mapping %s to %s", sessionID, otherSessionID))
            sessionIDToReplaySessionID[sessionID] = otherSessionID
        case payloadReplayedResponse: // if it's the replayed response
            Debug(fmt.Sprintf("Mapping %s to %s", otherSessionID, sessionID))
            sessionIDToReplaySessionID[otherSessionID] = sessionID
        }
        delete(asyncRequestIDQueue, reqID) // delete entry from the async map for clarity
    } else { // if this request ID hasn't been logged
        Debug(fmt.Sprintf("Mapping request ID %s to %s", reqID, sessionID))
        asyncRequestIDQueue[reqID] = sessionID
    }
}