jlpoole/LMXF-specification
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Merge branch 'master' of github.com:markqvist/LXMF

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This commit is contained in:
Mark Qvist 2023-01-27 16:37:15 +01:00
commit 2bb34176b7
2 changed files with 8 additions and 8 deletions
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LXMF/LXMessage.py
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@ -33,9 +33,9 @@ class LXMessage:
DESTINATION_LENGTH = RNS.Identity.TRUNCATED_HASHLENGTH//8
SIGNATURE_LENGTH = RNS.Identity.SIGLENGTH//8
# LXMF overhead is 99 bytes per message:
# 10 bytes for destination hash
# 10 bytes for source hash
# LXMF overhead is 111 bytes per message:
# 16 bytes for destination hash
# 16 bytes for source hash
# 64 bytes for Ed25519 signature
# 8 bytes for timestamp
# 7 bytes for msgpack structure
@ -53,7 +53,7 @@ class LXMessage:
# field of the packet, therefore we also add the length
# of a destination hash to the calculation. With default
# RNS and LXMF parameters, the largest single-packet
# LXMF message we can send is 294 bytes. If a message
# LXMF message we can send is 288 bytes. If a message
# is larger than that, a Reticulum link will be used.
ENCRYPTED_PACKET_MAX_CONTENT = ENCRYPTED_PACKET_MDU - LXMF_OVERHEAD + DESTINATION_LENGTH
@ -63,13 +63,13 @@ class LXMessage:
LINK_PACKET_MDU = RNS.Link.MDU
# Which means that we can deliver single-packet LXMF
# messages with content of up to 332 bytes over a link.
# messages with content of up to 320 bytes over a link.
# If a message is larger than that, LXMF will sequence
# and transfer it as a RNS resource over the link instead.
LINK_PACKET_MAX_CONTENT = LINK_PACKET_MDU - LXMF_OVERHEAD
# For plain packets without encryption, we can
# fit up to 388 bytes of content.
# fit up to 369 bytes of content.
PLAIN_PACKET_MDU = RNS.Packet.PLAIN_MDU
PLAIN_PACKET_MAX_CONTENT = PLAIN_PACKET_MDU - LXMF_OVERHEAD + DESTINATION_LENGTH