feat: WebRTC-Direct support for Node.js

Supports listening and dialing WebRTC Direct multiaddrs in Node.js.

Depends on:

- [ ] libp2p/go-libp2p#2827
- [ ] paullouisageneau/libdatachannel#1201
- [ ] paullouisageneau/libdatachannel#1204
- [ ] murat-dogan/node-datachannel#257
- [ ] murat-dogan/node-datachannel#256

Closes:

- #2581

packages/integration-tests/test/interop.ts

@@ -15,6 +15,7 @@ import { mplex } from '@libp2p/mplex'
 import { peerIdFromKeys } from '@libp2p/peer-id'
 import { tcp } from '@libp2p/tcp'
 import { tls } from '@libp2p/tls'
+import { webRTCDirect } from '@libp2p/webrtc'
 import { multiaddr } from '@multiformats/multiaddr'
 import { execa } from 'execa'
 import { path as p2pd } from 'go-libp2p'
@@ -45,6 +46,12 @@ async function createGoPeer (options: SpawnOptions): Promise<Daemon> {
 
   if (options.noListen === true) {
     opts.push('-noListenAddrs')
+
+    if (options.transport === 'webrtc-direct') {
+      // dialing webrtc-direct is broken in go-libp2p at the moment
+      // https://github.com/libp2p/go-libp2p/issues/2827
+      throw new UnsupportedError()
+    }
   } else {
     if (options.transport == null || options.transport === 'tcp') {
       opts.push('-hostAddrs=/ip4/127.0.0.1/tcp/0')
@@ -132,7 +139,11 @@ async function createJsPeer (options: SpawnOptions): Promise<Daemon> {
     addresses: {
       listen: []
     },
-    transports: [tcp(), circuitRelayTransport()],
+    transports: [
+      tcp(),
+      circuitRelayTransport(),
+      webRTCDirect()
+    ],
     streamMuxers: [],
     connectionEncryption: [noise()],
     connectionManager: {
@@ -143,12 +154,14 @@ async function createJsPeer (options: SpawnOptions): Promise<Daemon> {
   if (options.noListen !== true) {
     if (options.transport == null || options.transport === 'tcp') {
       opts.addresses?.listen?.push('/ip4/127.0.0.1/tcp/0')
+    } else if (options.transport === 'webrtc-direct') {
+      opts.addresses?.listen?.push('/ip4/127.0.0.1/udp/0/webrtc-direct')
     } else {
       throw new UnsupportedError()
     }
   }
 
-  if (options.transport === 'webtransport' || options.transport === 'webrtc-direct') {
+  if (options.transport === 'webtransport') {
     throw new UnsupportedError()
   }
 

packages/transport-webrtc/package.json

@@ -50,6 +50,7 @@
     "doc-check": "aegir doc-check"
   },
   "dependencies": {
+    "@chainsafe/is-ip": "^2.0.2",
     "@chainsafe/libp2p-noise": "^15.0.0",
     "@libp2p/interface": "^1.4.0",
     "@libp2p/interface-internal": "^1.2.2",
@@ -58,6 +59,7 @@
     "@multiformats/mafmt": "^12.1.6",
     "@multiformats/multiaddr": "^12.2.3",
     "@multiformats/multiaddr-matcher": "^1.2.1",
+    "@peculiar/x509": "^1.11.0",
     "detect-browser": "^5.3.0",
     "it-length-prefixed": "^9.0.4",
     "it-protobuf-stream": "^1.1.3",
@@ -72,6 +74,7 @@
     "protons-runtime": "^5.4.0",
     "race-signal": "^1.0.2",
     "react-native-webrtc": "^118.0.7",
+    "stun": "^2.1.0",
     "uint8arraylist": "^2.4.8",
     "uint8arrays": "^5.1.0"
   },
@@ -98,7 +101,9 @@
     "sinon-ts": "^2.0.0"
   },
   "browser": {
-    "./dist/src/webrtc/index.js": "./dist/src/webrtc/index.browser.js"
+    "./dist/src/webrtc/index.js": "./dist/src/webrtc/index.browser.js",
+    "./dist/src/private-to-public/listener.js": "./dist/src/private-to-public/listener.browser.js",
+    "./dist/src/private-to-public/utils/get-dialer-rtcpeerconnection.js": "./dist/src/private-to-public/utils/get-dialer-rtcpeerconnection.browser.js"
   },
   "react-native": {
     "./dist/src/webrtc/index.js": "./dist/src/webrtc/index.react-native.js"

packages/transport-webrtc/src/private-to-public/constants.ts

@@ -0,0 +1,2 @@
+
+export const UFRAG_PREFIX = 'libp2p+webrtc+v1/'

packages/transport-webrtc/src/private-to-public/listener.browser.ts

@@ -0,0 +1,28 @@
+import { TypedEventEmitter } from '@libp2p/interface'
+import { unimplemented } from '../error.js'
+import type { PeerId, ListenerEvents, Listener } from '@libp2p/interface'
+import type { TransportManager } from '@libp2p/interface-internal'
+import type { Multiaddr } from '@multiformats/multiaddr'
+
+export interface WebRTCDirectListenerComponents {
+  peerId: PeerId
+  transportManager: TransportManager
+}
+
+export interface WebRTCDirectListenerInit {
+  shutdownController: AbortController
+}
+
+export class WebRTCDirectListener extends TypedEventEmitter<ListenerEvents> implements Listener {
+  async listen (): Promise<void> {
+    throw unimplemented('WebRTCTransport.createListener')
+  }
+
+  getAddrs (): Multiaddr[] {
+    return []
+  }
+
+  async close (): Promise<void> {
+
+  }
+}