def sendErrorResponseForRequest(self, receivedConnectedSIPMessage, statusCodeInteger=500, reasonPhraseString='Server Error', descriptionString='An unknown server error occurred.'):
# TODO: I believe we need to reliably send this response, including retransmission, etc. For now, just send the damn thing.
# Response header fields to include in a response are documented in RFC3261 8.2.6
sipRequestReplyingTo = receivedConnectedSIPMessage.sipMessage
connection = receivedConnectedSIPMessage.connection
sipResponse = SIPResponse.newForAttributes(statusCode=statusCodeInteger, reasonPhrase=reasonPhraseString)
if sipRequestReplyingTo.header.toTag:
sipResponse.header.addHeaderField(sipRequestReplyingTo.header.toHeaderField)
else:
hf = sipRequestReplyingTo.header.toHeaderField.deepCopy
# TODO: See RFC3261 section 8.2.7 last point - tag must be invariant for identical To headers. So need to write a method to generate an invariant tag.
hf.generateTag()
sipResponse.header.addHeaderField(hf)
sipResponse.header.addHeaderField(sipRequestReplyingTo.header.fromHeaderField)
sipResponse.header.addHeaderField(sipRequestReplyingTo.header.callIDHeaderField)
sipResponse.header.addHeaderField(sipRequestReplyingTo.header.cSeqHeaderField)
sipResponse.header.addHeaderFields(sipRequestReplyingTo.viaHeaderFields)
sipResponse.header.addHeaderField(ContentLengthSIPHeaderField.newForIntegerValue(0))
sipResponse.clearRawString()
connection.sendMessage(sipResponse)
def newContentLengthHeaderFieldForSIPMessage(self, aSIPMessage):
return ContentLengthSIPHeaderField.newForIntegerValue(len(aSIPMessage.body))