A guide to P2P network penetration (stun) for metartc5.0 programming

summary

In order to save server bandwidth during audio and video communication , The best communication efficiency is p2p, But in real application scenarios , Our clients are all inside the large LAN ,stun The protocol is to solve how to penetrate these LAN implementations p2p.

metaRTC5.0 Latest version support stun, send p2p Use network penetration technology to realize communication on the Internet .

Download the source code

https://github.com/metartc/metaRTC/releases/tag/5.0.022https://github.com/metartc/metaRTC/releases/tag/5.0.022https://gitee.com/metartc/metaRTC/releases/5.0.022https://gitee.com/metartc/metaRTC/releases/5.0.022

 metaRTC5.0 Programming

metaRTC5.0 p2p stun There are two modes of programming ：

1. websockt+stun
2. http+frpc(ngrok)+stun

Configuration parameters

Code configuration parameters

 strcpy(m_context->avinfo.rtc.iceServerIP,"182.92.163.143"); //stun Server address 
 m_context->avinfo.rtc.iceStunPort=3478; //stun Server port 
 m_context->avinfo.rtc.hasIceServer=1; //1: Enable stun 0: close stun

Or in the configuration file yang_config.ini Middle configuration

[rtc]
hasIceServer=1
usingDatachannel=1
iceStunPort=3478
iceServerIP=182.92.163.143
audioQueueCount=5
vidoeQueueCount=5

Model a (websockt+stun)

Code in libmetartc5/src/yangp2p/YangP2pRtcIce.cpp in

// Initiate a connection to the opposite end 
int32_t YangP2pRtcIce::connectPeer(int32_t nettype, string server,int32_t localPort,int32_t pport,string app,string stream) {
	int32_t ret = 0;
	YangPeerConnection* sh=(YangPeerConnection*)calloc(sizeof(YangPeerConnection),1);
    .... Configuration parameters .....
    // initialization YangPeerConnection
	yang_create_peerConnection(sh);
    sh->init(&sh->peer);

	char* localSdp; // Local sdp
	char* remoteSdp=(char*)calloc(12*1000,1); // Opposite end sdp
	// towards stun Server send stun request Get the Internet address and port 
	if(m_context->avinfo.rtc.hasIceServer){
		if(sh->requestStunServer(&sh->peer)!=Yang_Ok) yang_error("request stun server fail!");
	}
    // Get local end sdp
	sh->createOffer(&sh->peer, &localSdp);
	
     take sdp It is transmitted to the opposite end through signaling service 
	

	// Get the opposite end sdp after , start-up metartc
	ret=sh->setRemoteDescription(&sh->peer,remoteSdp);
}

// Get the opposite end sdp after ,  call sh->createAnswer(&sh->peer,answer);
// obtain answer after , It is transmitted to the opposite end through signaling service 
int32_t YangP2pRtcIce::addPeer(char* remotesdp,char* answer,char* remoteIp,int32_t localPort,int* phasplay) {
    Configuration parameters ...
   // initialization YangPeerConnection
	yang_create_peerConnection(sh);
    sh->init(&sh->peer);

	// towards stun Server send stun request Get the Internet address and port 
	if(m_context->avinfo.rtc.hasIceServer){
		if(sh->requestStunServer(&sh->peer)!=Yang_Ok) yang_error("request stun server fail!");
	}
   // obtain answer Sdp
	ret = sh->createAnswer(&sh->peer,answer);
    .... obtain answer after , It is transmitted to the opposite end through signaling service 

	// Get the opposite end sdp after , start-up metartc
	ret = sh->setRemoteDescription(&sh->peer,remotesdp);

	.....
}

Model 2 (http+frpc(ngrok)+stun)

In the original metap2p5 Of demo Modify... In code , Modify file libmetartc5/src/yangp2p/YangP2pRtc.cpp

adopt frpc(ngrok) Isomorphism http, Use the browser or client to directly access the Internet mapping address , The operating mode remains the same as the original mode .