PSOM

Message type:

    1. Record message(message type+message body);

• Close (message type=0x00)
• SetChannel (0x04)
• Break(0x06)
• RpcMessage(0x16)
• RPCOpen(0x37): The record body MUST include the PSOM channel identifier, which is an unsigned 32-bit integer(channel 0), and a special ConnMgr distributed object.

     2. PSOM operation channel message;

      PSOM channel messages represent a PSOM operation, which is an action to take or method to call that involves

      a particular distributed object.

      When a distributed object is first connected, it MUST be assigned a unique proxy identifier that is understood by the server (2)

      and client. (Proxy identifier 用来区分DO). 一方为自己定义一个ProxyId, 为一个大于0的整数，发送连接请求给另一方，另一方

      接收后为自己设定的ProxyId为接收的ProxyId的负数。

• OpenClose(0x86)
• Connect/Disconnect Child(0x84): 父DO可以连接或者断开子DO对象。ConnMgr和Meeting的连接是隐式建立的，其它DO的连接需要显式建立。
• RPC message: The RPC message type indicates the message is meant to call a given interface method with a pre-defined set of parameters.