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webrtc TCP转发

MorrisMao 2024-06-17 10:29:46

简介webrtc TCP转发

一、背景

配置webrtc relay udp经常会被被丢包。所以希望改成tcp看来转发

二、如何转发

peerconnection iceTransportPlicy 为 relay实现转发, 默认为all,是会优先P2P,不成功则走转发。默认是UDP

this.pc = new RTCPeerConnection({
      iceServers: [
      {'urls':'stun:xx.xx.xx.xx:3478'},
      {
        'urls':'turn:xx.xx.xx.xx:3478',
        'username':'xxx',
        'credential':'xxxx'
      }
      ],
      iceTransportPolicy: 'relay'
    });

这里配置的iceServers是给当前端用的。配置relay时,对端候选地址是没有当前ip,只会把iceserver发给对端是不知道当前的真时ip
此时只会有一条candidate数据, 不会把当前本地ip，外网ip等发出去

candidate:3566907199 1 udp 16785407 220.231.216.119 40269 typ relay raddr 0.0.0.0 rport 0 generation 0 ufrag nOr3 network-cost 999

二、配置TCP转发

tcp转发只要在turn加上transport=tcp参数即可

this.pc = new RTCPeerConnection({
      iceServers: [
      {'urls':'stun:xx.xx.xx.xx:3478'},
      {
        'urls':'turn:xx.xx.xx.xx:3478?transport=tcp',
        'username':'xxx','credential':'xxxx'}
      ],
      iceTransportPolicy: 'relay'
    });