fix: constrain ip6 listener to ip6 addresses (#3010)

achingbrain · web-flow · commit 22e62d00f508 · 2025-02-26T12:39:43.000Z
Solves a port conflict if both ip4 and ip6 wildcard ports are
listened on.

Only seems to affect some Linuxes.
diff --git a/packages/transport-tcp/src/utils.ts b/packages/transport-tcp/src/utils.ts
@@ -21,8 +21,14 @@ export function multiaddrToNetConfig (addr: Multiaddr, config: NetConfig = {}):
     }
   }
 
+  const options = addr.toOptions()
+
   // tcp listening
-  return { ...config, ...addr.toOptions() }
+  return {
+    ...config,
+    ...options,
+    ipv6Only: options.family === 6
+  }
 }
 
 export function getMultiaddrs (proto: 'ip4' | 'ip6', ip: string, port: number): Multiaddr[] {

Original file line number	Diff line number	Diff line change
`@@ -21,8 +21,14 @@ export function multiaddrToNetConfig (addr: Multiaddr, config: NetConfig = {}):`
`21`	`21`	`}`
`22`	`22`	`}`
`23`	`23`
	`24`	`+ const options = addr.toOptions()`
	`25`	`+`
`24`	`26`	`// tcp listening`
`25`		`- return { ...config, ...addr.toOptions() }`
	`27`	`+ return {`
	`28`	`+ ...config,`
	`29`	`+ ...options,`
	`30`	`+ ipv6Only: options.family === 6`
	`31`	`+ }`
`26`	`32`	`}`
`27`	`33`
`28`	`34`	`export function getMultiaddrs (proto: 'ip4' \| 'ip6', ip: string, port: number): Multiaddr[] {`