working out an example with 2 clients trying to connect

• There has to be some sort of server outside of the ICE server that handles the signaling
• The clients need some way to identify themselves on the signaling server so there is typically a login process. This is not required though.
• The signaling server is typically accessed through websockets
• Part of the point is to agree on an ICE server?
• Signaling follows a protocol called SDP (Session Description Protocol). Looks something like:

Caller                      Signaling Server                      Target Peer
"type": "offer",
"offer": {
  "sdp": "v=0\r\n...",
  "type": "offer"
},
"name": "userB"
--------------------->
  
                            "type": "offer",
                            "offer": {
                              "sdp": "v=0\r\n...",
                              "type": "offer"
                            },
                            "name": "userA"
                            --------------------->
                                                                "type": "answer",
                                                                "answer": {
                                                                  "sdp": "v=0\r\n...",
                                                                  "type": "answer"
                                                                },
                                                                "name": "userA"
                                                                <---------------------
                            "type": "answer",
                            "answer": {
                              "sdp": "v=0\r\n...",
                              "type": "answer"
                            }
                            <---------------------

  "type": "candidate",
  "candidate": {
    "candidate": "candidate:842163049 1 udp 1677729535 192.168.1.2 56143 typ host",
    "sdpMid": "0",
    "sdpMLineIndex": 0
  },
  "name": "userB"
  --------------------->
                             "type": "candidate",
                              "candidate": {
                                "candidate": "candidate:842163049 1 udp 1677729535 192.168.1.2 56143 typ host",
                                "sdpMid": "0",
                                "sdpMLineIndex": 0
                              },
                              "name": "userA"
                              --------------------->
  

candidate exchange goes back and forth between the caller and the target until they agree