In Game Message System

[AndMetal]

Not sure what client this is for, but here's some old, commented out code referring to the chat system:

	// @bp This is the chat server
	/*
	char packetData[] = "64.37.148.34.9876,MyServer,Testchar,23cd2c95";
	outapp = new EQApplicationPacket(OP_0x0282, sizeof(packetData));
	strcpy((char*)outapp->pBuffer, packetData);
	QueuePacket(outapp);
	delete outapp;
	*/

It appears 64.37.148.34 is Sony's chat server:

C:\>nslookup 64.37.148.34

Name:    eqchannel1.station.sony.com
Address:  64.37.148.34

A little bit more random info in the source:

common/EQStream.cpp

void EQStream::SetStreamType(EQStreamType type)
{
	_log(NET__NET_TRACE, _L "Changing stream type from %s to %s" __L, StreamTypeString(StreamType), StreamTypeString(type));
	StreamType=type;
	switch (StreamType) {
		case LoginStream:
			app_opcode_size=1;
			compressed=false;
			encoded=false;
			_log(NET__NET_TRACE, _L "Login stream has app opcode size %d, is not compressed or encoded." __L, app_opcode_size);
			break;
		case ChatOrMailStream:
		case ChatStream:
		case MailStream:
			app_opcode_size=1;
			compressed=false;
			encoded=true;
			_log(NET__NET_TRACE, _L "Chat/Mail stream has app opcode size %d, is not compressed, and is encoded." __L, app_opcode_size);
			break;
		case ZoneStream:
		case WorldStream:
		default:
			app_opcode_size=2;
			compressed=true;
			encoded=false;
			_log(NET__NET_TRACE, _L "World/Zone stream has app opcode size %d, is compressed, and is not encoded." __L, app_opcode_size);
			break;
	}
}

We also have Message Types for chat channels 1-10, so at the very least, we could patch together a secondary chat system using # commands:

#define MT_Chat1Echo			315
#define MT_Chat2Echo			316
#define MT_Chat3Echo			317
#define MT_Chat4Echo			318
#define MT_Chat5Echo			319
#define MT_Chat6Echo			320
#define MT_Chat7Echo			321
#define MT_Chat8Echo			322
#define MT_Chat9Echo			323
#define MT_Chat10Echo			324