[5/6] wsdapi: Add support for sending messages via UDP multicast.

[Owen Rudge]

On 27/07/2017 21:22, Vincent Povirk wrote:

 > Using rand() for this doesn't seem very random, and it could interfere
 > with an application's use of rand().

I've altered this to use BCryptGenRandom instead.

 > Sending messages to every adapter in sequence, with a delay for each,
 > doesn't seem right.

The spec doesn't explicitly state how multiple adapters should be 
handled. The SOAP over UDP spec just suggests how multicast messages 
should be sent (including delays and repeats as appropriate). However, 
I've changed this now so that a new thread is spawned for each adapter's 
transmission, which should reduce the overall time taken, and will also 
allow the Publish/UnPublish etc method to return immediately (or near 
enough), which appears to be the behaviour on Windows, as you've pointed 
out.

 > It seems like this will call WSACleanup even when freeing an object
 > that was never used.

Thanks, I've amended this too.

-- 
Owen Rudge
http://www.owenrudge.net/