Introduce my study of socket in this work,which has major use of websocket and netty and the computer language is used by java.

Reference
https://blog.csdn.net/weixin_44268792/article/details/106243014

https://github.com/shushushv/webrtc-p2p

In this project,I make many tests about websocket,socket,netty,negix and webRTC, which let me feel complex.

• webrtc.html file is used by javascript and webrtc to achieve a simple solution about video streaming communication between different client.

  There has need advancedly know some information and knowledge about socket protocols.

  • SDP :Session description protocol

    • The type of media (audio, video), media format (codec) that will be used in the browser-to-browser session

    • The IP address and port number used by both communicating parties.

    • P2P data transfer protocol, known as Secure RTP in WebRTC.

    • The bandwidth used for communication.

      .......

  • ICE :Protocol for NAT traversal ( somewhat similar to intranet traversal )

    • Use P2P for direct communication.

    • Use STUN (port mapping to traverse NAT) to achieve P2P communication that breaks through NAT gateways.

    • Use the TURN relay server for trunk communication that breaks through the firewall.

      .......

  • RTCIceCandidate

    • The RTCIceCandidate() constructor creates and returns a new RTCIceCandidate object, which can be configured to represent a single ICE candidate.