[edit] Push Mail

Currently push mail supports the following methods in funambol:

• WAP-PUSH (SMS)
• Server TCP/IP Push(STP)
• Client TCP/IP Push (CTP)
• Light polling

[edit] Wap-Push

Server sends a wap-push notification message in the form of a chain of sms with the push PKG#0. When the client receives it, starts the syncro (if the user ack's to it)

[edit] Server tcp/ip Push

Device starts a service listening on a defined tcp port. Server just sends the PKG#0 to the client, for doing so it need to meet two conditions:

• The server must know the client ip. (so it's needed the client to send its ip to the server)
• The device ip must be accesible from the server network (network-operator dependant)

Having a service in the client can be a security problem

[edit] Client TCP/IP Push

The client stabilishes a connection to the server, then starts a blocking read on the connection waiting for the PKG#0, the server keeps all connections alive. It needs a considerable amount of resources on the server when the number of devices grow

[edit] Light polling

Client waits for PKG#0 for a while and then disconnects, reconnecting later.

• Connects to the server
• Blocking read with timeout
• If PKG#0 the timeout is reset
• If not PKG#0 within the timeout client drops conn and waits.

[edit] Sources

Funambol's funambol_ds_server_push_design.odt from cvs. No link found.