getaddrinfo vs gethostbyname

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From: Pierre Goyette (pierre_at_montreal.hcl.com)
Date: 06/30/04 

Date: Wed, 30 Jun 2004 19:43:28 -0400

I am adding support to my application for IP V6 and have followed the
programming guidelines from Microsoft.

I replaced the call to 'gethostbyname' to 'getaddrinfo'.

The problem is that getaddrinfo doesn't seem to do what gethostbyname does.

When I call gethostbyname with the a NULL parameter, I get back a list of
all IP V4 address on my machine.

Example:

    192.168.1.101
    192.168.127.1
    192.168.236.1

However, whenever I call getaddrinfo with the parms below (and I tried other
parms), I only seem to get a loopback address.

  Hints.ai_family = PF_INET6;
  Hints.ai_socktype = SOCK_STREAM;
  Hints.ai_flags = AI_NUMERICHOST | AI_PASSIVE;

 rc = getaddrinfo( NULL, szListenPort6, &Hints, &AddrInfo);

I want to listen on specific addresses for my service and I don't seem to be
able to enumerate addresses for IP V6 to do this. I used
GetAdaptersAddresses to get the real addresses but never seem to be able to
connect using those addresses.

All help is greatly appreciated.

Pierre

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