Three bugs fixed:
1. TCP stream fragmentation — guacd→browser data pipe treated each TCP
chunk as a complete instruction. TCP is a stream protocol; instructions
WILL be split across chunks (especially display/image data). Added
instruction buffer that accumulates data and only forwards complete
instructions (terminated by ';').
2. Missing client.onerror — when guacd fails the RDP connection (NLA,
auth, TLS), it sends a Guacamole error instruction. No handler was
registered, so errors were silently swallowed. User saw blank canvas
with no feedback. Now surfaces errors via console and gateway callback.
3. Missing client.onstatechange — no connection state tracking. Added
state transition logging for diagnostics.
Also improved CONNECT handshake logging to surface connection parameters
(host, port, user, domain, security mode) without exposing passwords.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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