generate a random mac address if none are available on the system

webmeshproj · Jul 8, 2023 · da292fe · da292fe
1 parent 6763bea
commit da292fe
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Showing 2 changed files with 11 additions and 3 deletions.
diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
@@ -16,6 +16,7 @@ jobs:
   tests:
     name: Unit Tests
     strategy:
+      fail-fast: false
       matrix:
         os: [ubuntu-latest, windows-latest, macos-latest]
     runs-on: ${{ matrix.os }}

diff --git a/pkg/util/netutil.go b/pkg/util/netutil.go
@@ -146,11 +146,18 @@ func RandomLocalMAC() (net.HardwareAddr, error) {
 		}
 	}
 
-	if len(addrs) < 1 {
-		return nil, fmt.Errorf("no valid MAC addresses found")
+	r := rand.New(rand.NewSource(time.Now().UnixNano()))
+
+	if len(addrs) == 0 {
+		// Generate a random MAC
+		mac := make([]byte, 6)
+		_, err := r.Read(mac)
+		if err != nil {
+			return nil, fmt.Errorf("failed to generate random MAC address: %w", err)
+		}
+		return mac, nil
 	}
 
-	r := rand.New(rand.NewSource(time.Now().UnixNano()))
 	ri := r.Intn(len(addrs))
 	return addrs[ri], nil
 }