BitTorrent does not need to connect to any particular member in a swarm, it’s not a p2p chat protocol where two specific end points want to talk to each other. All it cares about is that the connection graph of the swarm has a sufficiently high connectivity degree. In other words, getting clients behind a … Read more
The STUN server is NOT the signalling server. The purpose of the signalling server is to pass information between the peers at the start up of the session(how can they send an offer without knowing who to send to?). This information includes the SDPs that are created on the offers and the answers and also … Read more
TURN it’s an extension of STUN, so TURN server has also STUN features. https://code.google.com/p/rfc5766-turn-server/ works also as a STUN, so you can try to write something like this: var pc_config = { “iceServers”: [{ “url”:”turn:my_username@<turn_server_ip_address>”, “credential”:”my_password” }] }; pc_new = new webkitRTCPeerConnection(pc_config);
A STUN server is used to get an external network address. TURN servers are used to relay traffic if direct (peer to peer) connection fails. URLs for STUN and/or TURN servers are (optionally) specified by a WebRTC app in the iceServers configuration object that is the first argument to the RTCPeerConnection constructor. example of using … Read more
This example is in C#, not in Java, but the concepts of NAT traversal are language-agnostic. See Michael Lidgren’s network library which has NAT traversal built in. Link: http://code.google.com/p/lidgren-network-gen3/ Specific C# File Dealing with NAT Traversal: http://code.google.com/p/lidgren-network-gen3/source/browse/trunk/Lidgren.Network/NetNatIntroduction.cs The process you’ve posted is correct. It will work, for only 3 out of 4 general types of … Read more
STUN servers are used by both clients to determine their IP address as visible by the global Internet.If both the peers are behind the same NAT , STUN settings are not needed since they are anyways reachable form each other . STUN effectively comes into play when the peers are on different networks. As we … Read more
Edit: A nice implementation in github.io taken from comment to another answer( choose “relay” in IceTransports value): Test TURN Server following Benjamin Trent’s advice, I wrote the below code to test TURN server’s connectivity, works on both firefox n chrome: function checkTURNServer(turnConfig, timeout){ return new Promise(function(resolve, reject){ setTimeout(function(){ if(promiseResolved) return; resolve(false); promiseResolved = true; }, … Read more
WebRTC gives SDP Offer to the client JS app to send (however the JS app wants) to the other device, which uses that to generate an SDP Answer. The trick is that the SDP includes ICE candidates (effectively “try to talk to me at this IP address and this port”). ICE works to punch open … Read more