UDP, lNet and ipv6
lazarus / 38-Networking and Web Programming

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JohnvdWaeter · 2016-06-30 12:20

Hi All,

I have succesfully used the lNet TUDPComponent in a freepascal written
linux webservice to exchange data with an iOS app.

But now Apple is testing newly submitted iOS apps and updates to those
apps on a ipv6-only network.

My server needs to speak ipv6 now.

I have setup another lNet UDP component, on a different port.
The server also serves webpages and has a dedicated name that is
connected in DNS to an ipv6-ipnnr.
The server responds well to http-requests done via this dedicated ipv6
name.

But how do I tell this lNetUDPComponent to listen and respond to ipv6
packets?
I don't see any setting, except in the Socket, where there is a
property SocketNet that should be (?) set to laf_inet6.
But it seems to be read-only.

Any thoughts?

tia!
John

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Remy Lebeau · 2016-07-19 19:08

In the latest Inet library (https://lnet.wordpress.com), the SocketNet
property is read/write, not read-only.  So you should be able to set
SocketNet to LAF_INET6, and then call Listen() with its Intf parameter
set to an IPv6 address to listen on.