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Date: Fri, 29 Mar 2002 15:36:23 -0500 (EST)
From: David E Euresti <davie AT MIT DOT EDU>
To: <cygwin AT cygwin DOT com>
Subject: Re: sendto bug
Message-ID: <Pine.GSO.4.30L.0203291509340.24339-100000@magic-pi-ball.mit.edu>
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII


Actually the Single UNIX Specification says:

	If the socket is connectionless-mode, the message will be sent to
	the address specified by dest_addr. If the socket is
	connection-mode, dest_addr is ignored.

And since sendto calls either WSASendTo or winsock 1 sendTo that state:

	Even if the connectionless socket has been previously connected
	using the connect function to a specific address, lpTo overrides
	the destination address for that particular datagram only. On a
	connection-oriented socket, the lpTo and iToLen parameters are
	ignored; in this case, the WSASendTo is equivalent to WSASend.

Therefore there should be no harm in passing in the NULL value to sendto.

David

Quoting cgf:

I don't see anything in the linux man page or the Single UNIX
Specification which indicates that the "to" address can be NULL.

cgf



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