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From: steve@mimsy.UUCP (Steve D. Miller)
Newsgroups: comp.unix.wizards,comp.bugs.4bsd
Subject: Re: What mode should `whois' be?
Message-ID: <4657@mimsy.UUCP>
Date: Fri, 5-Dec-86 10:07:44 EST
Article-I.D.: mimsy.4657
Posted: Fri Dec  5 10:07:44 1986
Date-Received: Fri, 5-Dec-86 22:30:52 EST
References: <782@smeagol.UUCP>
Reply-To: steve@mimsy.UUCP (Steve D. Miller)
Organization: Computer Sci. Dept, U of Maryland, College Park, MD
Lines: 29
Keywords: BSD  whois
Summary: garbage args
Xref: mnetor comp.unix.wizards:257 comp.bugs.4bsd:58

AHA!  I looked at the source, and here's the *real* problem:

	struct sockaddr sin;

	sin.sin_family = AF_INET;
	if (bind(&sin, sizeof(sin)) < 0) ...

   It's not trying to bind to any particular port on the local machine;
it just wants the kernel to pick one for it.  Unfortunately, the
kernel does so only if no address is specified (all-zeroes), and this
is specifying a garbage address.

   There are two fixes:

	(1)  Remove the bind() call entirely; the connect() will
	pick a local socket automagically, as Phil Budne (budd@bu-cs)
	stated.

	(2)  stick a "bzero((char *)&sin, sizeof(sin))" just before
	the "sin.sin_family = AF_INET".  It will then bind a proper
	address, and everything will work as advertised.

   Time to send another bug report to Sun...

	-Steve
-- 
Spoken: Steve Miller 	ARPA:	steve@mimsy.umd.edu	Phone: +1-301-454-4251
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