def generate_outgoing_response(outgoing_message: Message,
incoming_packet: IncomingPacketBundle = None) -> OutgoingPacketBundle:
"""
generate the outgoing packet and check the RelayServerMessage around it.
:param outgoing_message: The reply message
:param incoming_packet: The original received packet, only used to sanity-check the reply
:return: The parsed message
"""
# Verify that the outer relay message makes sense
if not isinstance(outgoing_message, RelayReplyMessage):
raise ValueError("The reply has to be wrapped in a RelayReplyMessage")
if incoming_packet is not None:
# Verify the contents of the outgoing message
if outgoing_message.link_address != incoming_packet.link_address:
raise ValueError("The relay-reply link-address does not match the relay-forward link-address")
interface_id_option = outgoing_message.get_option_of_type(InterfaceIdOption)
if interface_id_option and interface_id_option.interface_id != incoming_packet.interface_id:
# If there is an interface-id option its contents have to match
raise ValueError("The interface-id in the reply does not match the interface-id of the request")
reply = outgoing_message.relayed_message
if not reply:
raise ValueError("The RelayReplyMessage does not contain a message")
# Down to network addresses and bytes
port = isinstance(reply, RelayReplyMessage) and SERVER_PORT or CLIENT_PORT
destination = outgoing_message.peer_address
data = reply.save()
return OutgoingPacketBundle(message_id=incoming_packet.message_id, data=data, destination=destination, port=port)
def generate_outgoing_response(
outgoing_message: Message,
incoming_packet: IncomingPacketBundle = None) -> OutgoingPacketBundle:
"""
generate the outgoing packet and check the RelayServerMessage around it.
:param outgoing_message: The reply message
:param incoming_packet: The original received packet, only used to sanity-check the reply
:return: The parsed message
"""
# Verify that the outer relay message makes sense
if not isinstance(outgoing_message, RelayReplyMessage):
raise ValueError("The reply has to be wrapped in a RelayReplyMessage")
if incoming_packet is not None:
# Verify the contents of the outgoing message
if outgoing_message.link_address != incoming_packet.link_address:
raise ValueError(
"The relay-reply link-address does not match the relay-forward link-address"
)
interface_id_option = outgoing_message.get_option_of_type(
InterfaceIdOption)
if interface_id_option and interface_id_option.interface_id != incoming_packet.interface_name.encode(
'utf-8'):
# If there is an interface-id option its contents have to match
raise ValueError(
"The interface-id in the reply does not match the interface-id of the request"
)
reply = outgoing_message.relayed_message
if not reply:
raise ValueError("The RelayReplyMessage does not contain a message")
# Down to network addresses and bytes
port = isinstance(reply, RelayReplyMessage) and SERVER_PORT or CLIENT_PORT
destination = outgoing_message.peer_address
data = reply.save()
return OutgoingPacketBundle(message_id=incoming_packet.message_id,
data=data,
destination=destination,
port=port)
