On Fri, Mar 29, 2002 at 03:36:23PM -0500, David E Euresti wrote: > >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.
I admit that I did miss that part (obviously) but I don't think that it follows that dest_addr can always be NULL. It looks like the value can be NULL only if the socket is not connection-less. Otherwise, it should be checked for validity. Also, if the argument is ignored then it apparently shouldn't be checked at all, even to see if the non-NULL address is valid. cgf -- Please do not send me personal email with cygwin questions. Use the resources at http://cygwin.com/ . -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Bug reporting: http://cygwin.com/bugs.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/
