summaryrefslogtreecommitdiff
path: root/vendor/golang.org/x/net/internal/nettest/interface.go
diff options
context:
space:
mode:
Diffstat (limited to 'vendor/golang.org/x/net/internal/nettest/interface.go')
-rw-r--r--vendor/golang.org/x/net/internal/nettest/interface.go94
1 files changed, 0 insertions, 94 deletions
diff --git a/vendor/golang.org/x/net/internal/nettest/interface.go b/vendor/golang.org/x/net/internal/nettest/interface.go
deleted file mode 100644
index 8e6333a..0000000
--- a/vendor/golang.org/x/net/internal/nettest/interface.go
+++ /dev/null
@@ -1,94 +0,0 @@
-// Copyright 2012 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package nettest
-
-import "net"
-
-// IsMulticastCapable reports whether ifi is an IP multicast-capable
-// network interface. Network must be "ip", "ip4" or "ip6".
-func IsMulticastCapable(network string, ifi *net.Interface) (net.IP, bool) {
- switch network {
- case "ip", "ip4", "ip6":
- default:
- return nil, false
- }
- if ifi == nil || ifi.Flags&net.FlagUp == 0 || ifi.Flags&net.FlagMulticast == 0 {
- return nil, false
- }
- return hasRoutableIP(network, ifi)
-}
-
-// RoutedInterface returns a network interface that can route IP
-// traffic and satisfies flags. It returns nil when an appropriate
-// network interface is not found. Network must be "ip", "ip4" or
-// "ip6".
-func RoutedInterface(network string, flags net.Flags) *net.Interface {
- switch network {
- case "ip", "ip4", "ip6":
- default:
- return nil
- }
- ift, err := net.Interfaces()
- if err != nil {
- return nil
- }
- for _, ifi := range ift {
- if ifi.Flags&flags != flags {
- continue
- }
- if _, ok := hasRoutableIP(network, &ifi); !ok {
- continue
- }
- return &ifi
- }
- return nil
-}
-
-func hasRoutableIP(network string, ifi *net.Interface) (net.IP, bool) {
- ifat, err := ifi.Addrs()
- if err != nil {
- return nil, false
- }
- for _, ifa := range ifat {
- switch ifa := ifa.(type) {
- case *net.IPAddr:
- if ip := routableIP(network, ifa.IP); ip != nil {
- return ip, true
- }
- case *net.IPNet:
- if ip := routableIP(network, ifa.IP); ip != nil {
- return ip, true
- }
- }
- }
- return nil, false
-}
-
-func routableIP(network string, ip net.IP) net.IP {
- if !ip.IsLoopback() && !ip.IsLinkLocalUnicast() && !ip.IsGlobalUnicast() {
- return nil
- }
- switch network {
- case "ip4":
- if ip := ip.To4(); ip != nil {
- return ip
- }
- case "ip6":
- if ip.IsLoopback() { // addressing scope of the loopback address depends on each implementation
- return nil
- }
- if ip := ip.To16(); ip != nil && ip.To4() == nil {
- return ip
- }
- default:
- if ip := ip.To4(); ip != nil {
- return ip
- }
- if ip := ip.To16(); ip != nil {
- return ip
- }
- }
- return nil
-}