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LXMF announce: advertise no SF_COMPRESSION (don't trigger Python bz2)

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encodeAnnounceName now emits msgpack fixarray(3):
  [display_name(bin), stamp_cost=0, supported_functionality=[]]

Empty supported_functionality list = SF_COMPRESSION (=0x00) absent,
so Python LXMF disables auto_compress for our destinations and stops
shipping bz2-compressed Resources we can't decode. Always emit the
3-element form even when the name is empty — Python defaults to
auto_compress=True for legacy <3-element app_data.

Pairs with microReticulum 290a133 which removed bz2 entirely.
This commit is contained in:
DeFiDude
2026-04-23 21:41:59 -06:00
parent 401107995a
commit b54ac52666
1 changed files with 16 additions and 9 deletions
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src/main.cpp
+16 -9
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@@ -150,16 +150,23 @@ static const char* currentPosixTZ() {
// Announce with display name (MessagePack-encoded app_data)
// =============================================================================
// LXMF announce app_data, current upstream format:
// [display_name(bin), stamp_cost(uint), supported_functionality(array)]
// Always emit fixarray(3) so Python LXMF doesn't default auto_compress=True for
// our destinations. Empty supported_functionality list = we do NOT support
// SF_COMPRESSION (bz2) — see microReticulum/src/Compression/BZ2.cpp.
RNS::Bytes encodeAnnounceName(const String& name) {
if (name.isEmpty()) return {};
size_t len = name.length();
if (len > 31) len = 31;
uint8_t buf[3 + 31];
buf[0] = 0x91; // msgpack fixarray(1)
buf[1] = 0xC4; // msgpack bin 8
buf[2] = (uint8_t)len; // bin len
memcpy(buf + 3, name.c_str(), len);
return RNS::Bytes(buf, 3 + len);
size_t nameLen = name.length();
if (nameLen > 31) nameLen = 31;
uint8_t buf[5 + 31];
size_t i = 0;
buf[i++] = 0x93; // fixarray(3)
buf[i++] = 0xC4; // bin 8
buf[i++] = (uint8_t)nameLen;
if (nameLen) { memcpy(buf + i, name.c_str(), nameLen); i += nameLen; }
buf[i++] = 0x00; // stamp_cost = 0
buf[i++] = 0x90; // empty fixarray (no SF_* supported)
return RNS::Bytes(buf, i);
}
static void announceWithName(bool silent = false) {