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UDP sockets? [message #23742]

Wed, 18 November 2009 18:26

Mindtraveller
Messages: 917
Registered: August 2007
Location: Russia, Moscow rgn.

Experienced Contributor

As it is stated in U++ help topics, it doesn't currently support UDP sockets. But I'd like to ask if it needs big effort to add UDP support into U++?

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Re: UDP sockets? [message #23749 is a reply to message #23742]

Thu, 19 November 2009 10:35

bonami
Messages: 186
Registered: June 2007
Location: Beijing

Experienced Member

i donno what "udp socket" you refer to. but i am using it.
socket() i suppose. do U need a more powerful class?

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Re: UDP sockets? [message #23757 is a reply to message #23749]

Thu, 19 November 2009 17:55

Mindtraveller
Messages: 917
Registered: August 2007
Location: Russia, Moscow rgn.

Experienced Contributor

Please show how you create UDP socket in U++. It is more likely TCP/IP socket.

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Re: UDP sockets? [message #23761 is a reply to message #23757]

Fri, 20 November 2009 02:41

bonami
Messages: 186
Registered: June 2007
Location: Beijing

Experienced Member

socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);

my whole project is EZ Comm on http://ezproject.sourceforge.net
It supports both TCP & UDP.

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Re: UDP sockets? [message #23767 is a reply to message #23761]

Fri, 20 November 2009 10:42

Mindtraveller
Messages: 917
Registered: August 2007
Location: Russia, Moscow rgn.

Experienced Contributor

Mindtraveller wrote on Thu, 19 November 2009 19:55

Please show how you create UDP socket in U++.

bonami wrote on Fri, 20 November 2009 04:41

socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);

There is no such socket constructor in U++. We have only

	Socket() {}
	Socket(One<Data> data) : data(data) {}

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Re: UDP sockets? [message #23770 is a reply to message #23767]

Fri, 20 November 2009 13:37

mirek
Messages: 14257
Registered: November 2005

Ultimate Member

Mindtraveller wrote on Fri, 20 November 2009 04:42

Mindtraveller wrote on Thu, 19 November 2009 19:55

Please show how you create UDP socket in U++.

bonami wrote on Fri, 20 November 2009 04:41

socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);

There is no such socket constructor in U++. We have only

	Socket() {}
	Socket(One<Data> data) : data(data) {}

That is true. But it appears that encapsulating UDP sockets really has little sense. But I might be wrong.

BTW, I have a nice thing called "Urr", which stands for "UDP request-response", which is package that implements UDP based request-response (both Strings) proprietary protocol (adding realiability and allowing messages of any size to pass).

Maybe it could be useful for you? I was considering adding this public sources for a while...

Maybe I will put it into bazaar.

Mirek

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Re: UDP sockets? [message #23771 is a reply to message #23770]

Fri, 20 November 2009 13:42

cbpporter
Messages: 1427
Registered: September 2007

Ultimate Contributor

luzr wrote on Fri, 20 November 2009 14:37

adding realiability

While I love reliability, UDP is by definition not reliable. I think any steps taken beyond a simple timeout would negate the benefits of it. Even the timeout is for some practical purposes overkill Smile

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Re: UDP sockets? [message #23773 is a reply to message #23771]

Fri, 20 November 2009 14:13

mirek
Messages: 14257
Registered: November 2005

Ultimate Member

cbpporter wrote on Fri, 20 November 2009 07:42

luzr wrote on Fri, 20 November 2009 14:37

adding realiability

I guess it is more sophisticated than that.

For both requests and response <8KB, if there is no lost packet, there are only 2 datagrams going through with Urr (one to server, one from it). So no efficiency is lost.

Anyway, it happily handles all possible issues like lost or duplicated or long packets.

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