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 // +build !nacl,!plan9,!windows 6 7 package net 8 9 // forceGoDNS forces the resolver configuration to use the pure Go resolver 10 // and returns a fixup function to restore the old settings. 11 func forceGoDNS() func() { 12 c := systemConf() 13 oldGo := c.netGo 14 oldCgo := c.netCgo 15 fixup := func() { 16 c.netGo = oldGo 17 c.netCgo = oldCgo 18 } 19 c.netGo = true 20 c.netCgo = false 21 return fixup 22 } 23 24 // forceCgoDNS forces the resolver configuration to use the cgo resolver 25 // and returns a fixup function to restore the old settings. 26 // (On non-Unix systems forceCgoDNS returns nil.) 27 func forceCgoDNS() func() { 28 c := systemConf() 29 oldGo := c.netGo 30 oldCgo := c.netCgo 31 fixup := func() { 32 c.netGo = oldGo 33 c.netCgo = oldCgo 34 } 35 c.netGo = false 36 c.netCgo = true 37 return fixup 38 } 39
