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Date: Thu, 17 Aug 2006 08:45:01 -0500
From: Brian Ford <Brian DOT Ford AT FlightSafety DOT com>
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To: cygwin AT cygwin DOT com
Subject: Re: Cygwin 1.5.18: Problem using setsockopt() for multicast
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On Thu, 17 Aug 2006, Alessandro Saffiotti wrote:

> I ran into the following problem when using setsockopt to create a
> multicast receiver in my own application.  Here is the relevant part
> of the code:
>
>   tcp_broadcast_receiver = socket(PF_INET,SOCK_DGRAM,IPPROTO_IP);
>
>   memset(&imreq, 0, sizeof(struct ip_mreq));
>   imreq.imr_multiaddr.s_addr = inet_addr("227.1.3.5");
>   imreq.imr_interface.s_addr = INADDR_ANY;

INADDR_ANY is in host byte order, but you need network order for this
call.

-- 
Brian Ford
Lead Realtime Software Engineer
VITAL - Visual Simulation Systems
FlightSafety International
the best safety device in any aircraft is a well-trained crew...

.


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