Chapter 1

Function Description
MGsdpPacketHandler is declared as,
class MGsdpPacketHandler
{
public:
and game protocol ID.
virtual void GsdpHandleL(const TDesC8& aData) = 0;
};
with the following function:
Function Description
GsdpHandleL() Handles a received packet. The server guarantees that the packet
matches the game protocol and port numbers required by the
protocol.
Server-side Symbian OS Implementation
The server is described elsewhere. It implements the requirements of the GSDP protocol's
external behavior and that of the client interface.
GSDP Chat
GSDP chat is the test code for GSDP. You can find the C++ source in \scmp\gsdpchat\. In
the GUI, the caption in English is Chat.
GSDP chat uses GSDP to set up and continue a conversation. All GSDP chat packets use
the distinguishing game protocol ID 0x10005405.
Partners to a chat session may be in one of four states:
State Meaning
Blank Nothing happening, not even connected to GSDP.
Bound A session is bound and active.
Initiating The initiating partner has opened a session with the GSDP server, selected a
GDP implementation, had a port ID allocated by the GSDP server, set the
GSDP chat protocol ID to 0x10005405, and has sent a GSDP packet to a
GDP address specifying a zero port ID. The initiating partner is now waiting for
a reply from that GDP address: the reply will cause the session to bind.
Listening A listening partner has opened a session with the GSDP server, selected a
GDP implementation, is using a zero port ID, and has issued Listen(). The
listening partner is expecting an incoming packet from any GDP
address(using the same protocol), any GSDP port, and the GSDP chat
protocol ID 0x10005405. When the packet comes in, the listening partner will
accept it and bind the session.