From 70eae619abf7f317a64c51cdb483e23463effdd9 Mon Sep 17 00:00:00 2001
From: achingbrain <alex@achingbrain.net>
Date: Mon, 7 Jul 2025 08:47:55 +0200
Subject: [PATCH 1/2] chore: run IPv6 compliance tests in CI

Other IPv6 tests in the suite run so we should be able to run the
compliance tests.
---
 test/compliance.spec.ts | 55 +++++++++++++++++++----------------------
 1 file changed, 26 insertions(+), 29 deletions(-)

diff --git a/test/compliance.spec.ts b/test/compliance.spec.ts
index e07793d..faf50cf 100644
--- a/test/compliance.spec.ts
+++ b/test/compliance.spec.ts
@@ -33,36 +33,33 @@ describe('Interface compliance tests (IPv4)', () => {
   })
 })
 
-// IPv6 isn't always available in CI
-if (!process.env.CI) {
-  describe('Interface compliance tests (IPv6)', function () {
-    transportCompliance({
-      async setup () {
-        const dialer = {
-          transports: [
-            quic()
-          ],
-          connectionMonitor: {
-            enabled: false
-          }
+describe('Interface compliance tests (IPv6)', function () {
+  transportCompliance({
+    async setup () {
+      const dialer = {
+        transports: [
+          quic()
+        ],
+        connectionMonitor: {
+          enabled: false
         }
+      }
 
-        return {
-          dialer,
-          listener: {
-            addresses: {
-              listen: [
-                '/ip6/::/udp/0/quic-v1',
-                '/ip6/::/udp/0/quic-v1'
-              ]
-            },
-            ...dialer
+      return {
+        dialer,
+        listener: {
+          addresses: {
+            listen: [
+              '/ip6/::/udp/0/quic-v1',
+              '/ip6/::/udp/0/quic-v1'
+            ]
           },
-          dialMultiaddrMatcher: QUICV1,
-          listenMultiaddrMatcher: QUICV1
-        }
-      },
-      async teardown () {}
-    })
+          ...dialer
+        },
+        dialMultiaddrMatcher: QUICV1,
+        listenMultiaddrMatcher: QUICV1
+      }
+    },
+    async teardown () {}
   })
-}
+})

From 498b8ee6ba0db3614f25046f9bf940d5fd93db63 Mon Sep 17 00:00:00 2001
From: achingbrain <alex@achingbrain.net>
Date: Mon, 7 Jul 2025 15:05:35 +0200
Subject: [PATCH 2/2] chore: detect ipv6

---
 test/compliance.spec.ts |  6 ++++++
 test/util.ts            | 18 ++++++++++++++++++
 2 files changed, 24 insertions(+)

diff --git a/test/compliance.spec.ts b/test/compliance.spec.ts
index faf50cf..a0fb25d 100644
--- a/test/compliance.spec.ts
+++ b/test/compliance.spec.ts
@@ -1,6 +1,7 @@
 import transportCompliance from '@libp2p/interface-compliance-tests/transport'
 import { QUICV1 } from '@multiformats/multiaddr-matcher'
 import { quic } from '../src/index.js'
+import { hostSupportsIpv6 } from './util.ts'
 
 describe('Interface compliance tests (IPv4)', () => {
   transportCompliance({
@@ -34,6 +35,11 @@ describe('Interface compliance tests (IPv4)', () => {
 })
 
 describe('Interface compliance tests (IPv6)', function () {
+  if (!hostSupportsIpv6()) {
+    it.skip('Host does not support IPv6', () => {})
+    return
+  }
+
   transportCompliance({
     async setup () {
       const dialer = {
diff --git a/test/util.ts b/test/util.ts
index 0afdf85..cc2817b 100644
--- a/test/util.ts
+++ b/test/util.ts
@@ -1,6 +1,8 @@
 import { generateKeyPair } from '@libp2p/crypto/keys'
 import { defaultLogger } from '@libp2p/logger'
 import type { QuicComponents } from '../src/index.js'
+import { isIPv6 } from '@chainsafe/is-ip'
+import os from 'node:os'
 
 export async function createComponents (): Promise<QuicComponents> {
   return {
@@ -8,3 +10,19 @@ export async function createComponents (): Promise<QuicComponents> {
     logger: defaultLogger()
   }
 }
+
+export function hostSupportsIpv6 (): boolean {
+  for (const interfaces of Object.values(os.networkInterfaces())) {
+    if (interfaces == null) {
+      continue
+    }
+
+    for (const info of interfaces) {
+      if (isIPv6(info.address)) {
+        return true
+      }
+    }
+  }
+
+  return false
+}