gtsocial-umbx

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helper.go (1088B)

      1 // Copyright 2013 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 ipv6
      6 
      7 import (
      8 	"errors"
      9 	"net"
     10 	"runtime"
     11 )
     12 
     13 var (
     14 	errInvalidConn     = errors.New("invalid connection")
     15 	errMissingAddress  = errors.New("missing address")
     16 	errHeaderTooShort  = errors.New("header too short")
     17 	errInvalidConnType = errors.New("invalid conn type")
     18 	errNotImplemented  = errors.New("not implemented on " + runtime.GOOS + "/" + runtime.GOARCH)
     19 )
     20 
     21 func boolint(b bool) int {
     22 	if b {
     23 		return 1
     24 	}
     25 	return 0
     26 }
     27 
     28 func netAddrToIP16(a net.Addr) net.IP {
     29 	switch v := a.(type) {
     30 	case *net.UDPAddr:
     31 		if ip := v.IP.To16(); ip != nil && ip.To4() == nil {
     32 			return ip
     33 		}
     34 	case *net.IPAddr:
     35 		if ip := v.IP.To16(); ip != nil && ip.To4() == nil {
     36 			return ip
     37 		}
     38 	}
     39 	return nil
     40 }
     41 
     42 func opAddr(a net.Addr) net.Addr {
     43 	switch a.(type) {
     44 	case *net.TCPAddr:
     45 		if a == nil {
     46 			return nil
     47 		}
     48 	case *net.UDPAddr:
     49 		if a == nil {
     50 			return nil
     51 		}
     52 	case *net.IPAddr:
     53 		if a == nil {
     54 			return nil
     55 		}
     56 	}
     57 	return a
     58 }