jlpoole/LMXF-specification
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Added compression support signalling

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This commit is contained in:
Mark Qvist 2026-04-19 13:27:32 +02:00
commit 72932eea28
3 changed files with 49 additions and 26 deletions
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19
LXMF/LXMF.py
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@ -103,6 +103,10 @@ PN_META_AUTH_BAND = 0x04
PN_META_UTIL_PRESSURE = 0x05
PN_META_CUSTOM = 0xFF
# Supported functionality codes for signalling
# feature and capability support.
SF_COMPRESSION = 0x00
##########################################################
# The following helper functions makes it easier to #
# handle and operate on LXMF data in client programs #
@ -147,6 +151,21 @@ def stamp_cost_from_app_data(app_data=None):
# Original announce format
else: return None
def compression_support_from_app_data(app_data=None):
if app_data == None or app_data == b"": return None
else:
# Version 0.5.0+ announce format
if (app_data[0] >= 0x90 and app_data[0] <= 0x9f) or app_data[0] == 0xdc:
peer_data = msgpack.unpackb(app_data)
if type(peer_data) == list:
if len(peer_data) < 3: return True
else:
if not type(peer_data[2]) == list: return True
else: return SF_COMPRESSION in peer_data[2]
# Original announce format
else: return True
def pn_name_from_app_data(app_data=None):
if app_data == None: return None
else: