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v1.0.12: Fix link MTU clamping, echo-back prevention, oversized frame detection

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MTU Clamping (Bug 8a): Clamp link MTU signalling in LINKREQUEST packets
when forwarding through transport node, matching Python reference impl.
Without this, TCP endpoints negotiate 8192-byte segments that exceed the
V3's 1064-byte HDLC buffer, causing silent truncation and permanent
resource transfer stalls at ~70%.

Fixed MTU declaration (Bug 8b): Set FIXED_MTU=true on TcpInterface so
Transport uses HW_MTU for clamping decisions.

Oversized frame detection (Bug 8c): Track truncated HDLC frames and
drop them with a diagnostic log instead of silently delivering corrupt
data to Transport.

Echo-back prevention (v1.0.10): Track which TCP client originated each
inbound frame and skip that client in send_outgoing() to prevent
flooding TCP buffers.

Register local client interface: Enable Transport forwarding of
announces, link packets, and proofs to TCP clients.

Document all discovered microReticulum bugs in MICRORETICULUM_BUGS.md.
This commit is contained in:
James L
2026-02-28 12:49:30 -05:00
parent 4e5d4ee8ad
commit 1122e9a0ee
5 changed files with 259 additions and 5 deletions
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lib/microReticulum/src/Transport.h
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@@ -312,6 +312,7 @@ namespace RNS {
static void handle_tunnel(const Bytes& tunnel_id, const Interface& interface);
static void register_interface(Interface& interface);
static void deregister_interface(const Interface& interface);
static void register_local_client_interface(const Interface& interface) { _local_client_interfaces.insert(std::cref(interface)); }
inline static const std::map<Bytes, Interface&> get_interfaces() { return _interfaces; }
static void register_destination(Destination& destination);
static void deregister_destination(const Destination& destination);