libgo/go/net/iprawsock.go

   1 // Copyright 2010 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 package net
   6
   7 // IPAddr represents the address of an IP end point.
   8 type IPAddr struct {
   9         IP   IP
  10         Zone string // IPv6 scoped addressing zone
  11 }
  12
  13 // Network returns the address's network name, "ip".
  14 func (a *IPAddr) Network() string { return "ip" }
  15
  16 func (a *IPAddr) String() string {
  17         if a == nil {
  18                 return "<nil>"
  19         }
  20         if a.Zone != "" {
  21                 return a.IP.String() + "%" + a.Zone
  22         }
  23         return a.IP.String()
  24 }
  25
  26 func (a *IPAddr) toAddr() Addr {
  27         if a == nil {
  28                 return nil
  29         }
  30         return a
  31 }
  32
  33 // ResolveIPAddr parses addr as an IP address of the form "host" or
  34 // "ipv6-host%zone" and resolves the domain name on the network net,
  35 // which must be "ip", "ip4" or "ip6".
  36 func ResolveIPAddr(net, addr string) (*IPAddr, error) {
  37         if net == "" { // a hint wildcard for Go 1.0 undocumented behavior
  38                 net = "ip"
  39         }
  40         afnet, _, err := parseNetwork(net)
  41         if err != nil {
  42                 return nil, err
  43         }
  44         switch afnet {
  45         case "ip", "ip4", "ip6":
  46         default:
  47                 return nil, UnknownNetworkError(net)
  48         }
  49         a, err := resolveInternetAddr(afnet, addr, noDeadline)
  50         if err != nil {
  51                 return nil, err
  52         }
  53         return a.toAddr().(*IPAddr), nil
  54 }