+const conf = {"iceServers": [{ "urls": "stun:stun.1.google.com:19302" }] }
+const clients = new Map([])
+const iceCandidates = []
+let dataChannel
+
+
+/* TODO: duplicate in both client.js and host.jhs */
+function getPublicKey() {
+ return new Promise( (resolve, reject) => {
+ /* Check local storage for public key */
+ if (!window.localStorage.getItem('public-key')) {
+ console.log('public key is undefined')
+ /* If doesn't exist, generate public and private key pair, store in
+ local storage */
+ crypto.subtle.generateKey(
+ { name:'RSA-OAEP',
+ modulusLength: 2048,
+ publicExponent: new Uint8Array([0x01, 0x00, 0x01]),
+ hash: {name: "SHA-256"}
+ },
+ true,
+ ['encrypt', 'decrypt']
+ ).then((keyPair) => {
+ /* TODO: Do we need to store the private key as well? */
+ crypto.subtle.exportKey('jwk', keyPair.publicKey)
+ .then((exportedKey) => {
+ window.localStorage.setItem('publicKey', exportedKey)
+ console.log('public key is' + window.localStorage.getItem('publicKey'))
+ resolve(exportedKey)
+ })
+
+ })
+ }
+ else {
+ resolve(window.localStorage.getItem('publicKey'))
+ }
+ })
+}
+
+function handleNewClientConnection(offer) {
+ /* New Client Connection*/
+ hpc = new RTCPeerConnection(conf)
+ //console.log(offer)
+ clients.set(offer.pubKey, hpc)
+ hpc.setRemoteDescription(offer.sdp)
+ .then(() => {
+ hpc.createAnswer().then((answer) => {
+ return hpc.setLocalDescription(answer)
+ })
+ .then(() => {
+ getPublicKey().then((hpk) => {
+ hpc.onicecandidate = (event) => {
+ if (event.candidate) {
+ console.log('Host: Allocating ice candidate for client')
+ iceCandidates.push(JSON.stringify({
+ cmd: "< ice pubKey",
+ ice: event.candidate,
+ hostPubKey: hpk.n, /* TODO: do we need to send this? */
+ clientPubKey: offer.pubKey,
+ iceCandidateAvailable: true
+ }))
+ }
+ else {
+ console.log('Host: Finished sending ICE candidates')
+ }
+ }
+ console.log('Host: Sending answer to Client')
+ wsock.send(JSON.stringify({
+ cmd: '< sdp pubKey',
+ sdp: hpc.localDescription,
+ hostPubKey: hpk.n,
+ clientPubKey: offer.pubKey
+ }))
+ hpc.ondatachannel = (evt) => {
+ dataChannel = evt.channel
+ console.log(evt)
+ dataChannel.onmessage = (msg) => {
+ console.log(msg.data)
+ }
+ dataChannel.onopen = () => {
+ dataChannel.send(`Hi ${offer.pubKey} -host`)
+ }
+ }
+ hpc.oniceconnectionstatechange = () => {
+ console.log('iceConnectionState = ' + hpc.iceConnectionState)
+ }
+ })
+ }).catch((err) => {
+ console.log(`error in host answer ${err}`)
+ })
+ })
+
+
+
+}
+
+function handleNewIceSubmission(msg) {
+ console.log('Host: Adding new ice candidate')
+ const hpc = clients.get(msg.pubKey)
+ let candidate = new RTCIceCandidate(msg.ice)
+ hpc.addIceCandidate(candidate)
+}
+
+function handleIceRequest(msg) {
+ console.log('Host: Handling ice candidate request')
+ console.log(iceCandidates)
+ const hpc = clients.get(msg)
+ const iceCandidate = iceCandidates.pop()
+ if (iceCandidate !== undefined) {
+ wsock.send(iceCandidate)
+ } else {
+ wsock.send(`{"cmd" : "< ice pubKey", "clientPubKey":"${msg.pubKey}", "iceCandidateAvailable": false}`)
+ }
+
+}