Openrtmfp/Cumulus performance optimization (6) rtmfp protocol (3)

The preceding two articles describe the handshake process of the rtmfp protocol. This article describes the connection process of the rtmfp protocol, as follows:

1. Receive packet processing as follows:

(1) read the marker value. uint8 marker = packet. read8 () | 0xf0; the marker value is marker = 0xfd.

(2). Read the values of timesent and lasttimerecv, _ timesent = packet. read16 ();

Uint16 timeecho = packet. read16 ();

(3). Read the typeid value. uint8 type = packet. Available ()> 0? Packet. read8 (): 0xff;

Note: The value of type is 0x10 or 0x11. type = 0x10 indicates a normal request, and type = 0x11 indicates a special request. For example

Is a stage request.

(4) read the flag, IdFlow, stage, and ACK in sequence, as follows:

Flags = message. read8 ();

Uint64 IdFlow = message. read7bitlongvalue ();

Stage = message. read7bitlongvalue ()-1;

Deltanack = message. read7bitlongvalue ()-1;

(5) read the digital signature as follows:

String signature;

Message. readstring8 (signature );

Note: The server will use this digital signature to create a flow for the client with the IdFlow read above,

Flow * pflow = createflow (IdFlow, signature );

(6) parse the Method Name field. The value of method name is "Connect", which is used to establish a connection.

(7) parse the AMF object, which contains some client-related information, as follows:

Amfsimpleobject OBJ;

Message. readsimpleobject (OBJ); // start Parsing

Message. startreferencing ();

(Uri&#peer.swf URL) = obj. getstring ("swfurl", ""); // SWF path

(URI &) Peer. pageurl) = obj. getstring ("pageurl", ""); // page path

(String &) Peer. flashversion) = obj. getstring ("flashver", ""); // version

(8) Respond to the client, meet the connection conditions, and establish a connection, as shown below:

Amfobjectwriter response (writer. writesuccessresponse ("Connect. Success", "connection succeeded "));

Response. Write ("objectencoding", 3.0 );

Accept = peer. onconnection (message, response );

2. The structure of the response packet package is as follows:

1. AMF object is the content written above, for example,

Response (writer. writesuccessresponse ("Connect. Success", "connection succeeded "));

Response. Write ("objectencoding", 3.0 );

("Objectencoding", "3"), ("code", "netconnection. Connect. Success") in JSON format "))

2. For other types like typeid, IdFlow is sent by the CONNECT request, which is not described here.

 

Not complete to be continued ~~

 

Reprinted please indicate the source: zhujian blog, http://blog.csdn.net/linyanwen99/article/details/8668952