Hi,

Just want to point that I did some work late 2017 on UDP sockets including multicast and broadcast. 
The package named 'NetworkExtras' is part of the ReusableBricks repo of my team.
http://smalltalkhub.com/#!/~CAR/ReusableBricks
It has some dependencies on other packages.

I tested it in Pharo 6, but not 7.

Noury
PS. Since I can't keep up with the mailing-list traffic, don't forget to keep me in CC so I can react

On 08 May 2018, at 15:36, Norbert Hartl <norbert@hartl.name> wrote:



Am 08.05.2018 um 15:05 schrieb Ben Coman <btc@openinworld.com>:

Le 8 mai 2018 �� 08:28, Henrik Sperre Johansen <henrik.s.johansen@veloxit.no> a ��crit :

HilaireFernandes wrote
Computer should be on a same network, however not sure about swtich in 
between.

Does UDP broadcast required particular privilege on the host?

Thanks

Hilaire

Le 06/05/2018 �� 13:31, Norbert Hartl a ��crit :
If it is on a single network this should be doable by using UDP broadcast
announcements. The share server can announce some information and its IP
in a UDP packet being broadcasted. Every client receives that and then
knows the address of the server to connect to

-- 
Dr. Geo
http://drgeo.eu

No, but it does involve setting certain options on the socket, etc.
You could check if http://smalltalkhub.com/#!/~henriksp/SSDP is
appropriate/works for you.

Cheers,
Henry



--
Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html



On 8 May 2018 at 15:32, C��drick B��ler <cdrick65@gmail.com> wrote:
Hi, FYI, Noury did this package (Network-Extra). I will test for my lecture. It has UDP Multicast/broadcast and may help for the discovery phase (I���m interested in that either).

He said that about it:

- UDP support : mutlicast + broadcast
- fragment a (large) data et assemble it over UDP
-la possibilit�� de fragmenter une donn��e trop grande et la reconstruire au-dessus d'UDP

Gofer it
smalltalkhubUser: 'CAR' project: 'ReusableBricks';
configurationOf: 'ReusableBricks';
loadBleedingEdge

Hope this help,

See you,

C��drick

Ps: tell me if you use it. 


If we've got multicast support for Pharo, perhaps its not a long jump to implementing mDNS.
Then the teacher could share out their machine as "teacher.local"
to let student machines connect to it.

If they all have Macs that would work. For the rest I doubt it will be that easy. 

Norbert

https://www.trustwave.com/Resources/SpiderLabs-Blog/mDNS---Telling-the-world-about-you-(and-your-device)/

https://tools.ietf.org/html/rfc6762
The most basic kind of Multicast DNS client may simply send standard
   DNS queries blindly to 224.0.0.251:5353, without necessarily even
   being aware of what a multicast address is.  This change can
   typically be implemented with just a few lines of code in an existing
   DNS resolver library.


@Udo, did you ever find that mDNS package you lost?
http://forum.world.st/Issue-with-UDP-Sockets-tp4827014p4827245.html


mDNS would be an interesting facility to include in the main Pharo release image,
perhaps making it very easy for our "live" systems to locate each other on a local network without external infrastructure.


cheers -ben