Communication - TCP UDP

[dodil]

I am currently trying to port some code to symbian and would like to do some P2P stuff over symbian phones. Can you please point me to some sample code that works on symbian. I am using the latest SDK and we plan to use UDP protocol for communication. Also we have an idea of having a registration server that will initially communicate the list of users in the vicinity - Is there any support for webservice calling from symbian code...the webservice will be simple and return somethng like <node1>:<ip address>,<node2>:<ipaddress>..and so on.

-JP

[amitkankani]

i guess you will need to develop this web service yourself.

as far as connection goes:
1. you could use http over tcp - http engines are available, so you only need to worry on the data part.

2. Sockets and tcp is another option.

3. sockets with UDP is another, here you sould be ready for packet loss...

also p2p stuff will also work via internet? in that case, i prefer it to be socket and tcp.

[wizard_hu_]

Some open source P2P projects are available from our department:
- Symella (Gnutella implementation for S60): symella.aut.bme.hu
- SymTorrent (guess what): symtorrent.aut.bme.hu

[dodil]

Hi Guys,

Thanks for your input. In terms of the current code we are using sockets provided by SDL_net in the PC world. The protocol in use is UDP. Can someone provide me with a simple client server model using UDP protocol in symbian? Also another doubt is will the program work on the emulator?

Thank you and regards,
JP

i guess you will need to develop this web service yourself.

as far as connection goes:
1. you could use http over tcp - http engines are available, so you only need to worry on the data part.

2. Sockets and tcp is another option.

3. sockets with UDP is another, here you sould be ready for packet loss...

also p2p stuff will also work via internet? in that case, i prefer it to be socket and tcp.

[amitkankani]

Also another doubt is will the program work on the emulator?

it should, all internet based programs work on emulator... unless you are using some sms/call related apis

[dodil]

Can someone provide me with a simple client server model using UDP protocol in symbian?

Thanks in advance for your help.

[wizard_hu_]

I have no complete code which would fit here, but the tasks are pretty simple:

Server
-RSocketServ Connect
-RConnection Open,Start
-RSocket Open(server,afinet,datagram,udp,connection)
-RSocket Bind
-RSocket RecvFrom

Client
-RSocketServ Connect
-RConnection Open,Start
-RSocket Open(server,afinet,datagram,udp,connection)
-RSocket SendTo

I have not tried without RConnection, the client should probably work that way too.

[dodil]

Still stuck..

Can you please post some basic example ? How P2P can be implemented.

[wizard_hu_]

What have you tried so far? Where does it fail? How have you tested (UDP - or at least some aspects of it like broadcasting - might not work in the emulator)?

[dodil]

I have converted all IPAddress types to TInetAddress types. Is the TInetAddress type equivalent to the IPAddress type of SDL_net.

Thx

[sriky27]

Hi,

A wiki article on networking a good starting point if you have not referred it http://wiki.forum.nokia.com/index.ph...he_sockets_API