Subj : src/sbbs3/mqtt.cpp
To   : Git commit to main/sbbs/master
From : Deucе
Date : Thu Aug 06 2026 11:27:43

https://gitlab.synchro.net/main/sbbs/-/commit/b073feab243a6e9136962c24
Modified Files:
	src/sbbs3/mqtt.cpp
Log Message:
mqtt: recognize OS hostname for internal broker

Internal broker selection preferred startup->host_name whenever it was
configured and used gethostname() only as a fallback. When Synchronet's
global hostname differed from the machine hostname, a broker address
matching the machine was classified as remote. No process started the
internal listener, and every server attempted a failing TCP connection
instead.

Compare the broker address independently against both the OS hostname
and the configured service hostname. Also initialize and explicitly
terminate the gethostname() buffer so a lookup failure or maximum-length
result cannot affect the comparison. Remote broker addresses continue to
take the TCP client path.

Verified by compiling:
  clang.freebsd.amd64.obj.debug-mt/mqtt.o
and running git diff --check.

Co-Authored-By: OpenAI Codex <noreply@openai.com>
--- SBBSecho 3.37-Linux
 * Origin: Vertrauen - [vert/cvs/bbs].synchro.net (1:103/705)

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