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Implemented delivery as single packets over links.

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This commit is contained in:
Mark Qvist 2021-08-28 15:30:47 +02:00
parent ad541b3db9
commit 1e8ef437b9
2 changed files with 26 additions and 10 deletions
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22
LXMF/LXMF.py
View File

@ -228,7 +228,7 @@ class LXMessage:
if self.desired_method == LXMessage.OPPORTUNISTIC:
if self.__destination.type == RNS.Destination.SINGLE:
single_packet_content_limit = LXMessage.RSA_PACKET_MAX_CONTENT
single_packet_content_limit = LXMessage.ENCRYPTED_PACKET_MAX_CONTENT
elif self.__destination.type == RNS.Destination.PLAIN:
single_packet_content_limit = LXMessage.PLAIN_PACKET_MAX_CONTENT
@ -256,9 +256,18 @@ class LXMessage:
if self.method == LXMessage.OPPORTUNISTIC:
self.__as_packet().send().set_delivery_callback(self.__mark_delivered)
self.state = LXMessage.SENT
elif self.method == LXMessage.DIRECT:
self.state = LXMessage.SENDING
if self.representation == LXMessage.PACKET:
receipt = self.__as_packet().send()
receipt.set_delivery_callback(self.__mark_delivered)
receipt.set_timeout_callback(self.__link_packet_timed_out)
elif self.representation == LXMessage.RESOURCE:
self.resource_representation = self.__as_resource()
elif self.method == LXMessage.PROPAGATED:
# TODO: Implement propagation
pass
@ -309,6 +318,10 @@ class LXMessage:
resource.link.teardown()
self.state = LXMessage.OUTBOUND
def __link_packet_timed_out(self, packet_receipt):
packet_receipt.destination.teardown()
self.state = LXMessage.OUTBOUND
def __update_transfer_progress(self, resource):
self.progress = resource.progress()
@ -543,14 +556,14 @@ class LXMRouter:
def delivery_packet(self, data, packet):
try:
if packet.destination.type != RNS.Destination.LINK:
if packet.destination_type != RNS.Destination.LINK:
lxmf_data = b""
lxmf_data += packet.destination.hash
lxmf_data += data
else:
lxmf_data = data
if self.lxmf_delivery(lxmf_data, packet.destination.type):
if self.lxmf_delivery(lxmf_data, packet.destination_type):
packet.prove()
except Exception as e:
@ -647,7 +660,10 @@ class LXMRouter:
lxmessage.set_delivery_destination(direct_link)
lxmessage.send()
else:
if lxmessage.representation == LXMessage.RESOURCE:
RNS.log("The transfer of "+str(lxmessage)+" is in progress ("+str(round(lxmessage.progress*100, 1))+"%)", RNS.LOG_DEBUG)
else:
RNS.log("Waiting for proof for "+str(lxmessage)+" sent as link packet", RNS.LOG_DEBUG)
elif direct_link.status == RNS.Link.CLOSED:
RNS.log("The link to "+RNS.prettyhexrep(lxmessage.get_destination().hash)+" was closed", RNS.LOG_DEBUG)
lxmessage.set_delivery_destination(None)

8
README.md
View File

@ -20,14 +20,14 @@ LXMF messages are stored in a simple and efficient format, that's easy to parse
##### And these rules:
1. A LXMF message is identified by it's __message-id__, which is a SHA-256 hash of the __Destination__, __Source__ and __Payload__. The message-id is never included directly in the message, since it can always be inferred from the message itself.
1. A LXMF message is identified by its __message-id__, which is a SHA-256 hash of the __Destination__, __Source__ and __Payload__. The message-id is never included directly in the message, since it can always be inferred from the message itself.
In some cases the actual message-id cannot be inferred, for example when a Propagation Node is storing an encrypted message for an offline user. In theses cases a _transient-id_ is used to identify the message while in storage or transit.
2. __Destination__, __Source__, __Signature__ and __Payload__ parts are mandatory, as is the __Timestamp__ part of the payload.
- The __Destination__ and __Source__ fields are Reticulum destination hashes
- The __Signature__ field is a Ed25519 signature of the __Destination__, __Source__, __Payload__ and __message-id__
- The __Payload__ part is a list containing four items:
- The __Destination__ and __Source__ fields are 10-byte Reticulum destination hashes
- The __Signature__ field is a 64-byte Ed25519 signature of the __Destination__, __Source__, __Payload__ and __message-id__
- The __Payload__ part is a [msgpacked](https://msgpack.org) list containing four items:
1. The __Timestamp__ is a double-precision floating point number representing the number of seconds since the UNIX epoch.
2. The __Content__ is the optional content or body of the message
3. The __Title__ is an optional title for the message