not used yet

Makefile

@@ -7,7 +7,6 @@ include $(GOROOT)/src/Make.inc
 TARG=dns
 GOFILES=\
 	parse.go\
-	dns.go\
 	msg.go\
 	resolver.go \
 	types.go\

README

@@ -0,0 +1,7 @@
+Alternate aproach to DNS
+
+
+
+
+Net::DNS
+ldns

dns.go

@@ -1,37 +0,0 @@
-// Copyright 2009 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.
-
-// DNS client: see RFC 1035.
-// Has to be linked into package net for Dial.
-
-// TODO(rsc):
-//	Check periodically whether /etc/resolv.conf has changed.
-//	Could potentially handle many outstanding lookups faster.
-//	Could have a small cache.
-//	Random UDP source port (net.Dial should do that for us).
-//	Random request IDs.
-
-package dns
-
-// DnsError represents a DNS lookup error.
-type DnsError struct {
-	Error     string // description of the error
-	Name      string // name looked for
-	Server    string // server used
-	IsTimeout bool
-}
-
-func (e *DnsError) String() string {
-	s := "lookup " + e.Name
-	if e.Server != "" {
-		s += " on " + e.Server
-	}
-	s += ": " + e.Error
-	return s
-}
-
-func (e *DnsError) Timeout() bool   { return e.IsTimeout }
-func (e *DnsError) Temporary() bool { return e.IsTimeout }
-
-const noSuchHost = "no such host"

resolver.go

@@ -16,9 +16,9 @@ import (
 	"net"
 )
 
-type MsgErr struct {
-	M *Msg
-	E os.Error
+type DnsMsg struct {
+	Dns *Msg
+	Error os.Error
 }
 
 type Resolver struct {
@@ -35,22 +35,22 @@ type Resolver struct {
 
 // Start a new querier as a goroutine, return
 // the communication channel
-func NewQuerier(res *Resolver) (ch chan MsgErr) {
-	ch = make(chan MsgErr)
+func NewQuerier(res *Resolver) (ch chan DnsMsg) {
+	ch = make(chan DnsMsg)
 	go query(res, ch)
 	return
 }
 
 
 // do it
-func query(res *Resolver, msg chan MsgErr) {
+func query(res *Resolver, msg chan DnsMsg) {
 	var c net.Conn
 	var err os.Error
 	var in *Msg
 	for {
 		select {
 		case out := <-msg: //msg received
-			if out.M == nil {
+			if out.Dns == nil {
 				// nil message, quit the goroutine
 				return
 			}
@@ -58,10 +58,10 @@ func query(res *Resolver, msg chan MsgErr) {
 			var cerr os.Error
 			// Set an id
 			//if len(name) >= 256 {
-			out.M.Id = uint16(rand.Int()) ^ uint16(time.Nanoseconds())
-			sending, ok := out.M.Pack()
+			out.Dns.Id = uint16(rand.Int()) ^ uint16(time.Nanoseconds())
+			sending, ok := out.Dns.Pack()
 			if !ok {
-				msg <- MsgErr{nil, nil} // todo error
+				msg <- DnsMsg{nil, nil} // todo error
 			}
 
 			for i := 0; i < len(res.Servers); i++ {
@@ -81,9 +81,9 @@ func query(res *Resolver, msg chan MsgErr) {
 				}
 			}
 			if err != nil {
-				msg <- MsgErr{nil, err}
+				msg <- DnsMsg{nil, err}
 			} else {
-				msg <- MsgErr{in, nil}
+				msg <- DnsMsg{in, nil}
 			}
 		}
 	}

restest.go

@@ -28,23 +28,23 @@ func main() {
 	for i:=0; i< NLOOP; i++ {
 		// ask something
 		m.Question[0] = dns.Question{"miek.nl", dns.TypeSOA, dns.ClassINET}
-		ch <- dns.MsgErr{m, nil}
+		ch <- dns.DnsMsg{m, nil}
 
 		// wait for an reply
 		in := <-ch
-		fmt.Printf("%v\n", in.M)
+		fmt.Printf("%v\n", in.Dns)
 
 		m.Question[0] = dns.Question{"a.miek.nl", dns.TypeTXT, dns.ClassINET}
-		ch <- dns.MsgErr{m, nil}
+		ch <- dns.DnsMsg{m, nil}
 		in = <-ch
-		fmt.Printf("%v\n", in.M)
+		fmt.Printf("%v\n", in.Dns)
 
 		m.Question[0] = dns.Question{"miek.nl", dns.TypeTXT, dns.ClassINET}
-		ch <- dns.MsgErr{m, nil}
+		ch <- dns.DnsMsg{m, nil}
 		in = <-ch
-		fmt.Printf("%v\n", in.M)
+		fmt.Printf("%v\n", in.Dns)
 	}
-	ch <- dns.MsgErr{nil, nil}
+	ch <- dns.DnsMsg{nil, nil}
 
 	time.Sleep(2.0e9) // wait for Go routine to do something
 }