The HTTP/1.1 stack sits directly on these two classes and each of these
bit it:
- gethostbyname() returning null on an unresolvable host was dereferenced
straight into a crash, and it is not thread safe; use getaddrinfo.
- A failed socket()/connect() only printed to stderr and handed back an
unusable ClientTCP, so the real error surfaced much later as an
unrelated errno from send().
- send() was assumed to accept everything it was offered. It does not
once a buffer outgrows the socket's send buffer, which silently
truncated multi-megabyte bodies. Loop, and pass MSG_NOSIGNAL so a
vanished peer raises EPIPE instead of killing the process.
- ClientTCP's move constructor closed the socket it had just taken
ownership of, and both it and the destructor tested `socketid != 1`
where they meant `!= -1`.
- ListenerTCP ignored bind()'s result, leaving a listener that accepted
nothing with no explanation, and did not set SO_REUSEADDR, so a
restart hit EADDRINUSE for the length of TIME_WAIT.
accept() failing during Stop() is expected and no longer logged.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
