libgo/go/net/port.go

   1 // Copyright 2012 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 // Network service port manipulations
   6
   7 package net
   8
   9 // parsePort parses port as a network service port number for both
  10 // TCP and UDP.
  11 func parsePort(net, port string) (int, error) {
  12         p, i, ok := dtoi(port, 0)
  13         if !ok || i != len(port) {
  14                 var err error
  15                 p, err = LookupPort(net, port)
  16                 if err != nil {
  17                         return 0, err
  18                 }
  19         }
  20         if p < 0 || p > 0xFFFF {
  21                 return 0, &AddrError{"invalid port", port}
  22         }
  23         return p, nil
  24 }