golang.org/x/net@v0.25.1-0.20240516223405-c87a5b62e243/ipv6/helper_unix_test.go (about)

     1  // Copyright 2015 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  //go:build aix || darwin || dragonfly || freebsd || linux || netbsd || openbsd || solaris || zos
     6  
     7  package ipv6_test
     8  
     9  import (
    10  	"fmt"
    11  	"runtime"
    12  )
    13  
    14  func supportsIPv6MulticastDeliveryOnLoopback() (string, bool) {
    15  	switch runtime.GOOS {
    16  	case "freebsd":
    17  		// See http://www.freebsd.org/cgi/query-pr.cgi?pr=180065.
    18  		// Even after the fix, it looks like the latest
    19  		// kernels don't deliver link-local scoped multicast
    20  		// packets correctly.
    21  		return fmt.Sprintf("not supported on %s/%s", runtime.GOOS, runtime.GOARCH), false
    22  	case "openbsd":
    23  		// Multicast packets don't seem to be delivered locally.
    24  		// Issue 42064.
    25  		return fmt.Sprintf("not supported on %s/%s", runtime.GOOS, runtime.GOARCH), false
    26  	default:
    27  		return "", true
    28  	}
    29  }