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net: rearrange source files so we could run more tests on windows

Browse Source 
R=rsc
CC=golang-dev
https://golang.org/cl/4603043
This commit is contained in:
Alex Brainman 2011-06-13 10:22:31 +10:00
parent 95b8137a16
commit 9ded954a3b
9 changed files with 443 additions and 478 deletions
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15
src/pkg/net/Makefile
View File

@ -7,6 +7,7 @@ include ../../Make.inc
TARG=net TARG=net
GOFILES=\ GOFILES=\
dial.go\ dial.go\
dnsclient.go\
dnsmsg.go\ dnsmsg.go\
fd_$(GOOS).go\ fd_$(GOOS).go\
hosts.go\ hosts.go\
@ -14,7 +15,6 @@ GOFILES=\
ip.go\ ip.go\
ipsock.go\ ipsock.go\
iprawsock.go\ iprawsock.go\
lookup.go\
net.go\ net.go\
parse.go\ parse.go\
pipe.go\ pipe.go\
@ -24,11 +24,12 @@ GOFILES=\
unixsock.go\ unixsock.go\
GOFILES_freebsd=\ GOFILES_freebsd=\
dnsclient.go\ dnsclient_unix.go\
dnsconfig.go\ dnsconfig.go\
fd.go\ fd.go\
file.go\ file.go\
interface_bsd.go\ interface_bsd.go\
lookup_unix.go\
newpollserver.go\ newpollserver.go\
port.go\ port.go\
sendfile_stub.go\ sendfile_stub.go\
@ -39,11 +40,12 @@ CGOFILES_freebsd=\
cgo_unix.go\ cgo_unix.go\
GOFILES_darwin=\ GOFILES_darwin=\
dnsclient.go\ dnsclient_unix.go\
dnsconfig.go\ dnsconfig.go\
fd.go\ fd.go\
file.go\ file.go\
interface_bsd.go\ interface_bsd.go\
lookup_unix.go\
newpollserver.go\ newpollserver.go\
port.go\ port.go\
sendfile_stub.go\ sendfile_stub.go\
@ -54,11 +56,12 @@ CGOFILES_darwin=\
cgo_unix.go\ cgo_unix.go\
GOFILES_linux=\ GOFILES_linux=\
dnsclient.go\ dnsclient_unix.go\
dnsconfig.go\ dnsconfig.go\
fd.go\ fd.go\
file.go\ file.go\
interface_linux.go\ interface_linux.go\
lookup_unix.go\
newpollserver.go\ newpollserver.go\
port.go\ port.go\
sendfile_linux.go\ sendfile_linux.go\
@ -66,6 +69,7 @@ GOFILES_linux=\
GOFILES_plan9=\ GOFILES_plan9=\
interface_stub.go\ interface_stub.go\
lookup_unix.go\
sendfile_stub.go\ sendfile_stub.go\
ifeq ($(GOARCH),arm) ifeq ($(GOARCH),arm)
@ -78,10 +82,9 @@ CGOFILES_linux=\
endif endif
GOFILES_windows=\ GOFILES_windows=\
cgo_stub.go\
file_windows.go\ file_windows.go\
interface_stub.go\ interface_stub.go\
resolv_windows.go\ lookup_windows.go\
sendfile_windows.go\ sendfile_windows.go\
sock_windows.go\ sock_windows.go\

367
src/pkg/net/dnsclient.go
View File

@ -2,16 +2,6 @@
// Use of this source code is governed by a BSD-style // Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file. // 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 net package net
import ( import (
@ -19,9 +9,6 @@ import (
"fmt" "fmt"
"os" "os"
"rand" "rand"
"sync"
"time"
"sort"
) )
// DNSError represents a DNS lookup error. // DNSError represents a DNS lookup error.
@ -49,54 +36,31 @@ func (e *DNSError) Temporary() bool { return e.IsTimeout }
const noSuchHost = "no such host" const noSuchHost = "no such host"
// Send a request on the connection and hope for a reply. // reverseaddr returns the in-addr.arpa. or ip6.arpa. hostname of the IP
// Up to cfg.attempts attempts. // address addr suitable for rDNS (PTR) record lookup or an error if it fails
func exchange(cfg *dnsConfig, c Conn, name string, qtype uint16) (*dnsMsg, os.Error) { // to parse the IP address.
if len(name) >= 256 { func reverseaddr(addr string) (arpa string, err os.Error) {
return nil, &DNSError{Error: "name too long", Name: name} ip := ParseIP(addr)
if ip == nil {
return "", &DNSError{Error: "unrecognized address", Name: addr}
} }
out := new(dnsMsg) if ip.To4() != nil {
out.id = uint16(rand.Int()) ^ uint16(time.Nanoseconds()) return fmt.Sprintf("%d.%d.%d.%d.in-addr.arpa.", ip[15], ip[14], ip[13], ip[12]), nil
out.question = []dnsQuestion{
{name, qtype, dnsClassINET},
} }
out.recursion_desired = true // Must be IPv6
msg, ok := out.Pack() var buf bytes.Buffer
if !ok { // Add it, in reverse, to the buffer
return nil, &DNSError{Error: "internal error - cannot pack message", Name: name} for i := len(ip) - 1; i >= 0; i-- {
s := fmt.Sprintf("%02x", ip[i])
buf.WriteByte(s[1])
buf.WriteByte('.')
buf.WriteByte(s[0])
buf.WriteByte('.')
} }
// Append "ip6.arpa." and return (buf already has the final .)
for attempt := 0; attempt < cfg.attempts; attempt++ { return buf.String() + "ip6.arpa.", nil
n, err := c.Write(msg)
if err != nil {
return nil, err
} }
c.SetReadTimeout(int64(cfg.timeout) * 1e9) // nanoseconds
buf := make([]byte, 2000) // More than enough.
n, err = c.Read(buf)
if err != nil {
if e, ok := err.(Error); ok && e.Timeout() {
continue
}
return nil, err
}
buf = buf[0:n]
in := new(dnsMsg)
if !in.Unpack(buf) || in.id != out.id {
continue
}
return in, nil
}
var server string
if a := c.RemoteAddr(); a != nil {
server = a.String()
}
return nil, &DNSError{Error: "no answer from server", Name: name, Server: server, IsTimeout: true}
}
// Find answer for name in dns message. // Find answer for name in dns message.
// On return, if err == nil, addrs != nil. // On return, if err == nil, addrs != nil.
func answer(name, server string, dns *dnsMsg, qtype uint16) (cname string, addrs []dnsRR, err os.Error) { func answer(name, server string, dns *dnsMsg, qtype uint16) (cname string, addrs []dnsRR, err os.Error) {
@ -150,63 +114,6 @@ Cname:
return "", nil, &DNSError{Error: "too many redirects", Name: name, Server: server} return "", nil, &DNSError{Error: "too many redirects", Name: name, Server: server}
} }
// Do a lookup for a single name, which must be rooted
// (otherwise answer will not find the answers).
func tryOneName(cfg *dnsConfig, name string, qtype uint16) (cname string, addrs []dnsRR, err os.Error) {
if len(cfg.servers) == 0 {
return "", nil, &DNSError{Error: "no DNS servers", Name: name}
}
for i := 0; i < len(cfg.servers); i++ {
// Calling Dial here is scary -- we have to be sure
// not to dial a name that will require a DNS lookup,
// or Dial will call back here to translate it.
// The DNS config parser has already checked that
// all the cfg.servers[i] are IP addresses, which
// Dial will use without a DNS lookup.
server := cfg.servers[i] + ":53"
c, cerr := Dial("udp", server)
if cerr != nil {
err = cerr
continue
}
msg, merr := exchange(cfg, c, name, qtype)
c.Close()
if merr != nil {
err = merr
continue
}
cname, addrs, err = answer(name, server, msg, qtype)
if err == nil || err.(*DNSError).Error == noSuchHost {
break
}
}
return
}
func convertRR_A(records []dnsRR) []IP {
addrs := make([]IP, len(records))
for i, rr := range records {
a := rr.(*dnsRR_A).A
addrs[i] = IPv4(byte(a>>24), byte(a>>16), byte(a>>8), byte(a))
}
return addrs
}
func convertRR_AAAA(records []dnsRR) []IP {
addrs := make([]IP, len(records))
for i, rr := range records {
a := make(IP, 16)
copy(a, rr.(*dnsRR_AAAA).AAAA[:])
addrs[i] = a
}
return addrs
}
var cfg *dnsConfig
var dnserr os.Error
func loadConfig() { cfg, dnserr = dnsReadConfig() }
func isDomainName(s string) bool { func isDomainName(s string) bool {
// See RFC 1035, RFC 3696. // See RFC 1035, RFC 3696.
if len(s) == 0 { if len(s) == 0 {
@ -255,141 +162,6 @@ func isDomainName(s string) bool {
return ok return ok
} }
var onceLoadConfig sync.Once
func lookup(name string, qtype uint16) (cname string, addrs []dnsRR, err os.Error) {
if !isDomainName(name) {
return name, nil, &DNSError{Error: "invalid domain name", Name: name}
}
onceLoadConfig.Do(loadConfig)
if dnserr != nil || cfg == nil {
err = dnserr
return
}
// If name is rooted (trailing dot) or has enough dots,
// try it by itself first.
rooted := len(name) > 0 && name[len(name)-1] == '.'
if rooted || count(name, '.') >= cfg.ndots {
rname := name
if !rooted {
rname += "."
}
// Can try as ordinary name.
cname, addrs, err = tryOneName(cfg, rname, qtype)
if err == nil {
return
}
}
if rooted {
return
}
// Otherwise, try suffixes.
for i := 0; i < len(cfg.search); i++ {
rname := name + "." + cfg.search[i]
if rname[len(rname)-1] != '.' {
rname += "."
}
cname, addrs, err = tryOneName(cfg, rname, qtype)
if err == nil {
return
}
}
// Last ditch effort: try unsuffixed.
rname := name
if !rooted {
rname += "."
}
cname, addrs, err = tryOneName(cfg, rname, qtype)
if err == nil {
return
}
return
}
// goLookupHost is the native Go implementation of LookupHost.
// Used only if cgoLookupHost refuses to handle the request
// (that is, only if cgoLookupHost is the stub in cgo_stub.go).
// Normally we let cgo use the C library resolver instead of
// depending on our lookup code, so that Go and C get the same
// answers.
func goLookupHost(name string) (addrs []string, err os.Error) {
// Use entries from /etc/hosts if they match.
addrs = lookupStaticHost(name)
if len(addrs) > 0 {
return
}
onceLoadConfig.Do(loadConfig)
if dnserr != nil || cfg == nil {
err = dnserr
return
}
ips, err := goLookupIP(name)
if err != nil {
return
}
addrs = make([]string, 0, len(ips))
for _, ip := range ips {
addrs = append(addrs, ip.String())
}
return
}
// goLookupIP is the native Go implementation of LookupIP.
// Used only if cgoLookupIP refuses to handle the request
// (that is, only if cgoLookupIP is the stub in cgo_stub.go).
// Normally we let cgo use the C library resolver instead of
// depending on our lookup code, so that Go and C get the same
// answers.
func goLookupIP(name string) (addrs []IP, err os.Error) {
onceLoadConfig.Do(loadConfig)
if dnserr != nil || cfg == nil {
err = dnserr
return
}
var records []dnsRR
var cname string
cname, records, err = lookup(name, dnsTypeA)
if err != nil {
return
}
addrs = convertRR_A(records)
if cname != "" {
name = cname
}
_, records, err = lookup(name, dnsTypeAAAA)
if err != nil && len(addrs) > 0 {
// Ignore error because A lookup succeeded.
err = nil
}
if err != nil {
return
}
addrs = append(addrs, convertRR_AAAA(records)...)
return
}
// goLookupCNAME is the native Go implementation of LookupCNAME.
// Used only if cgoLookupCNAME refuses to handle the request
// (that is, only if cgoLookupCNAME is the stub in cgo_stub.go).
// Normally we let cgo use the C library resolver instead of
// depending on our lookup code, so that Go and C get the same
// answers.
func goLookupCNAME(name string) (cname string, err os.Error) {
onceLoadConfig.Do(loadConfig)
if dnserr != nil || cfg == nil {
err = dnserr
return
}
_, rr, err := lookup(name, dnsTypeCNAME)
if err != nil {
return
}
cname = rr[0].(*dnsRR_CNAME).Cname
return
}
// An SRV represents a single DNS SRV record. // An SRV represents a single DNS SRV record.
type SRV struct { type SRV struct {
Target string Target string
@ -436,35 +208,6 @@ func shuffleSRVByWeight(addrs []*SRV) {
} }
} }
// LookupSRV tries to resolve an SRV query of the given service,
// protocol, and domain name, as specified in RFC 2782. In most cases
// the proto argument can be the same as the corresponding
// Addr.Network(). The returned records are sorted by priority
// and randomized by weight within a priority.
func LookupSRV(service, proto, name string) (cname string, addrs []*SRV, err os.Error) {
target := "_" + service + "._" + proto + "." + name
var records []dnsRR
cname, records, err = lookup(target, dnsTypeSRV)
if err != nil {
return
}
addrs = make([]*SRV, len(records))
for i, rr := range records {
r := rr.(*dnsRR_SRV)
addrs[i] = &SRV{r.Target, r.Port, r.Priority, r.Weight}
}
sort.Sort(byPriorityWeight(addrs))
i := 0
for j := 1; j < len(addrs); j++ {
if addrs[i].Priority != addrs[j].Priority {
shuffleSRVByWeight(addrs[i:j])
i = j
}
}
shuffleSRVByWeight(addrs[i:len(addrs)])
return
}
// An MX represents a single DNS MX record. // An MX represents a single DNS MX record.
type MX struct { type MX struct {
Host string Host string
@ -479,73 +222,3 @@ func (s byPref) Len() int { return len(s) }
func (s byPref) Less(i, j int) bool { return s[i].Pref < s[j].Pref } func (s byPref) Less(i, j int) bool { return s[i].Pref < s[j].Pref }
func (s byPref) Swap(i, j int) { s[i], s[j] = s[j], s[i] } func (s byPref) Swap(i, j int) { s[i], s[j] = s[j], s[i] }
// LookupMX returns the DNS MX records for the given domain name sorted by preference.
func LookupMX(name string) (mx []*MX, err os.Error) {
_, rr, err := lookup(name, dnsTypeMX)
if err != nil {
return
}
mx = make([]*MX, len(rr))
for i := range rr {
r := rr[i].(*dnsRR_MX)
mx[i] = &MX{r.Mx, r.Pref}
}
// Shuffle the records to match RFC 5321 when sorted
for i := range mx {
j := rand.Intn(i + 1)
mx[i], mx[j] = mx[j], mx[i]
}
sort.Sort(byPref(mx))
return
}
// reverseaddr returns the in-addr.arpa. or ip6.arpa. hostname of the IP
// address addr suitable for rDNS (PTR) record lookup or an error if it fails
// to parse the IP address.
func reverseaddr(addr string) (arpa string, err os.Error) {
ip := ParseIP(addr)
if ip == nil {
return "", &DNSError{Error: "unrecognized address", Name: addr}
}
if ip.To4() != nil {
return fmt.Sprintf("%d.%d.%d.%d.in-addr.arpa.", ip[15], ip[14], ip[13], ip[12]), nil
}
// Must be IPv6
var buf bytes.Buffer
// Add it, in reverse, to the buffer
for i := len(ip) - 1; i >= 0; i-- {
s := fmt.Sprintf("%02x", ip[i])
buf.WriteByte(s[1])
buf.WriteByte('.')
buf.WriteByte(s[0])
buf.WriteByte('.')
}
// Append "ip6.arpa." and return (buf already has the final .)
return buf.String() + "ip6.arpa.", nil
}
// LookupAddr performs a reverse lookup for the given address, returning a list
// of names mapping to that address.
func LookupAddr(addr string) (name []string, err os.Error) {
name = lookupStaticAddr(addr)
if len(name) > 0 {
return
}
var arpa string
arpa, err = reverseaddr(addr)
if err != nil {
return
}
var records []dnsRR
_, records, err = lookup(arpa, dnsTypePTR)
if err != nil {
return
}
name = make([]string, len(records))
for i := range records {
r := records[i].(*dnsRR_PTR)
name[i] = r.Ptr
}
return
}

262
src/pkg/net/dnsclient_unix.go Normal file
View File

@ -0,0 +1,262 @@
// 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 net
import (
"os"
"rand"
"sync"
"time"
)
// Send a request on the connection and hope for a reply.
// Up to cfg.attempts attempts.
func exchange(cfg *dnsConfig, c Conn, name string, qtype uint16) (*dnsMsg, os.Error) {
if len(name) >= 256 {
return nil, &DNSError{Error: "name too long", Name: name}
}
out := new(dnsMsg)
out.id = uint16(rand.Int()) ^ uint16(time.Nanoseconds())
out.question = []dnsQuestion{
{name, qtype, dnsClassINET},
}
out.recursion_desired = true
msg, ok := out.Pack()
if !ok {
return nil, &DNSError{Error: "internal error - cannot pack message", Name: name}
}
for attempt := 0; attempt < cfg.attempts; attempt++ {
n, err := c.Write(msg)
if err != nil {
return nil, err
}
c.SetReadTimeout(int64(cfg.timeout) * 1e9) // nanoseconds
buf := make([]byte, 2000) // More than enough.
n, err = c.Read(buf)
if err != nil {
if e, ok := err.(Error); ok && e.Timeout() {
continue
}
return nil, err
}
buf = buf[0:n]
in := new(dnsMsg)
if !in.Unpack(buf) || in.id != out.id {
continue
}
return in, nil
}
var server string
if a := c.RemoteAddr(); a != nil {
server = a.String()
}
return nil, &DNSError{Error: "no answer from server", Name: name, Server: server, IsTimeout: true}
}
// Do a lookup for a single name, which must be rooted
// (otherwise answer will not find the answers).
func tryOneName(cfg *dnsConfig, name string, qtype uint16) (cname string, addrs []dnsRR, err os.Error) {
if len(cfg.servers) == 0 {
return "", nil, &DNSError{Error: "no DNS servers", Name: name}
}
for i := 0; i < len(cfg.servers); i++ {
// Calling Dial here is scary -- we have to be sure
// not to dial a name that will require a DNS lookup,
// or Dial will call back here to translate it.
// The DNS config parser has already checked that
// all the cfg.servers[i] are IP addresses, which
// Dial will use without a DNS lookup.
server := cfg.servers[i] + ":53"
c, cerr := Dial("udp", server)
if cerr != nil {
err = cerr
continue
}
msg, merr := exchange(cfg, c, name, qtype)
c.Close()
if merr != nil {
err = merr
continue
}
cname, addrs, err = answer(name, server, msg, qtype)
if err == nil || err.(*DNSError).Error == noSuchHost {
break
}
}
return
}
func convertRR_A(records []dnsRR) []IP {
addrs := make([]IP, len(records))
for i, rr := range records {
a := rr.(*dnsRR_A).A
addrs[i] = IPv4(byte(a>>24), byte(a>>16), byte(a>>8), byte(a))
}
return addrs
}
func convertRR_AAAA(records []dnsRR) []IP {
addrs := make([]IP, len(records))
for i, rr := range records {
a := make(IP, 16)
copy(a, rr.(*dnsRR_AAAA).AAAA[:])
addrs[i] = a
}
return addrs
}
var cfg *dnsConfig
var dnserr os.Error
func loadConfig() { cfg, dnserr = dnsReadConfig() }
var onceLoadConfig sync.Once
func lookup(name string, qtype uint16) (cname string, addrs []dnsRR, err os.Error) {
if !isDomainName(name) {
return name, nil, &DNSError{Error: "invalid domain name", Name: name}
}
onceLoadConfig.Do(loadConfig)
if dnserr != nil || cfg == nil {
err = dnserr
return
}
// If name is rooted (trailing dot) or has enough dots,
// try it by itself first.
rooted := len(name) > 0 && name[len(name)-1] == '.'
if rooted || count(name, '.') >= cfg.ndots {
rname := name
if !rooted {
rname += "."
}
// Can try as ordinary name.
cname, addrs, err = tryOneName(cfg, rname, qtype)
if err == nil {
return
}
}
if rooted {
return
}
// Otherwise, try suffixes.
for i := 0; i < len(cfg.search); i++ {
rname := name + "." + cfg.search[i]
if rname[len(rname)-1] != '.' {
rname += "."
}
cname, addrs, err = tryOneName(cfg, rname, qtype)
if err == nil {
return
}
}
// Last ditch effort: try unsuffixed.
rname := name
if !rooted {
rname += "."
}
cname, addrs, err = tryOneName(cfg, rname, qtype)
if err == nil {
return
}
return
}
// goLookupHost is the native Go implementation of LookupHost.
// Used only if cgoLookupHost refuses to handle the request
// (that is, only if cgoLookupHost is the stub in cgo_stub.go).
// Normally we let cgo use the C library resolver instead of
// depending on our lookup code, so that Go and C get the same
// answers.
func goLookupHost(name string) (addrs []string, err os.Error) {
// Use entries from /etc/hosts if they match.
addrs = lookupStaticHost(name)
if len(addrs) > 0 {
return
}
onceLoadConfig.Do(loadConfig)
if dnserr != nil || cfg == nil {
err = dnserr
return
}
ips, err := goLookupIP(name)
if err != nil {
return
}
addrs = make([]string, 0, len(ips))
for _, ip := range ips {
addrs = append(addrs, ip.String())
}
return
}
// goLookupIP is the native Go implementation of LookupIP.
// Used only if cgoLookupIP refuses to handle the request
// (that is, only if cgoLookupIP is the stub in cgo_stub.go).
// Normally we let cgo use the C library resolver instead of
// depending on our lookup code, so that Go and C get the same
// answers.
func goLookupIP(name string) (addrs []IP, err os.Error) {
onceLoadConfig.Do(loadConfig)
if dnserr != nil || cfg == nil {
err = dnserr
return
}
var records []dnsRR
var cname string
cname, records, err = lookup(name, dnsTypeA)
if err != nil {
return
}
addrs = convertRR_A(records)
if cname != "" {
name = cname
}
_, records, err = lookup(name, dnsTypeAAAA)
if err != nil && len(addrs) > 0 {
// Ignore error because A lookup succeeded.
err = nil
}
if err != nil {
return
}
addrs = append(addrs, convertRR_AAAA(records)...)
return
}
// goLookupCNAME is the native Go implementation of LookupCNAME.
// Used only if cgoLookupCNAME refuses to handle the request
// (that is, only if cgoLookupCNAME is the stub in cgo_stub.go).
// Normally we let cgo use the C library resolver instead of
// depending on our lookup code, so that Go and C get the same
// answers.
func goLookupCNAME(name string) (cname string, err os.Error) {
onceLoadConfig.Do(loadConfig)
if dnserr != nil || cfg == nil {
err = dnserr
return
}
_, rr, err := lookup(name, dnsTypeCNAME)
if err != nil {
return
}
cname = rr[0].(*dnsRR_CNAME).Cname
return
}

7
src/pkg/net/dnsmsg_test.go
View File

@ -6,14 +6,10 @@ package net
import ( import (
"encoding/hex" "encoding/hex"
"runtime"
"testing" "testing"
) )
func TestDNSParseSRVReply(t *testing.T) { func TestDNSParseSRVReply(t *testing.T) {
if runtime.GOOS == "windows" {
return
}
data, err := hex.DecodeString(dnsSRVReply) data, err := hex.DecodeString(dnsSRVReply)
if err != nil { if err != nil {
t.Fatal(err) t.Fatal(err)
@ -45,9 +41,6 @@ func TestDNSParseSRVReply(t *testing.T) {
} }
func TestDNSParseCorruptSRVReply(t *testing.T) { func TestDNSParseCorruptSRVReply(t *testing.T) {
if runtime.GOOS == "windows" {
return
}
data, err := hex.DecodeString(dnsSRVCorruptReply) data, err := hex.DecodeString(dnsSRVCorruptReply)
if err != nil { if err != nil {
t.Fatal(err) t.Fatal(err)

4
src/pkg/net/dnsname_test.go
View File

@ -6,7 +6,6 @@ package net
import ( import (
"testing" "testing"
"runtime"
) )
type testCase struct { type testCase struct {
@ -55,9 +54,6 @@ func getTestCases(ch chan<- testCase) {
} }
func TestDNSNames(t *testing.T) { func TestDNSNames(t *testing.T) {
if runtime.GOOS == "windows" {
return
}
ch := make(chan testCase) ch := make(chan testCase)
go getTestCases(ch) go getTestCases(ch)
for tc := range ch { for tc := range ch {

50
src/pkg/net/lookup.go
View File

@ -1,50 +0,0 @@
// Copyright 2011 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.
package net
import (
"os"
)
// LookupHost looks up the given host using the local resolver.
// It returns an array of that host's addresses.
func LookupHost(host string) (addrs []string, err os.Error) {
addrs, err, ok := cgoLookupHost(host)
if !ok {
addrs, err = goLookupHost(host)
}
return
}
// LookupIP looks up host using the local resolver.
// It returns an array of that host's IPv4 and IPv6 addresses.
func LookupIP(host string) (addrs []IP, err os.Error) {
addrs, err, ok := cgoLookupIP(host)
if !ok {
addrs, err = goLookupIP(host)
}
return
}
// LookupPort looks up the port for the given network and service.
func LookupPort(network, service string) (port int, err os.Error) {
port, err, ok := cgoLookupPort(network, service)
if !ok {
port, err = goLookupPort(network, service)
}
return
}
// LookupCNAME returns the canonical DNS host for the given name.
// Callers that do not care about the canonical name can call
// LookupHost or LookupIP directly; both take care of resolving
// the canonical name as part of the lookup.
func LookupCNAME(name string) (cname string, err os.Error) {
cname, err, ok := cgoLookupCNAME(name)
if !ok {
cname, err = goLookupCNAME(name)
}
return
}

126
src/pkg/net/lookup_unix.go Normal file
View File

@ -0,0 +1,126 @@
// Copyright 2011 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.
package net
import (
"os"
"rand"
"sort"
)
// LookupHost looks up the given host using the local resolver.
// It returns an array of that host's addresses.
func LookupHost(host string) (addrs []string, err os.Error) {
addrs, err, ok := cgoLookupHost(host)
if !ok {
addrs, err = goLookupHost(host)
}
return
}
// LookupIP looks up host using the local resolver.
// It returns an array of that host's IPv4 and IPv6 addresses.
func LookupIP(host string) (addrs []IP, err os.Error) {
addrs, err, ok := cgoLookupIP(host)
if !ok {
addrs, err = goLookupIP(host)
}
return
}
// LookupPort looks up the port for the given network and service.
func LookupPort(network, service string) (port int, err os.Error) {
port, err, ok := cgoLookupPort(network, service)
if !ok {
port, err = goLookupPort(network, service)
}
return
}
// LookupCNAME returns the canonical DNS host for the given name.
// Callers that do not care about the canonical name can call
// LookupHost or LookupIP directly; both take care of resolving
// the canonical name as part of the lookup.
func LookupCNAME(name string) (cname string, err os.Error) {
cname, err, ok := cgoLookupCNAME(name)
if !ok {
cname, err = goLookupCNAME(name)
}
return
}
// LookupSRV tries to resolve an SRV query of the given service,
// protocol, and domain name, as specified in RFC 2782. In most cases
// the proto argument can be the same as the corresponding
// Addr.Network(). The returned records are sorted by priority
// and randomized by weight within a priority.
func LookupSRV(service, proto, name string) (cname string, addrs []*SRV, err os.Error) {
target := "_" + service + "._" + proto + "." + name
var records []dnsRR
cname, records, err = lookup(target, dnsTypeSRV)
if err != nil {
return
}
addrs = make([]*SRV, len(records))
for i, rr := range records {
r := rr.(*dnsRR_SRV)
addrs[i] = &SRV{r.Target, r.Port, r.Priority, r.Weight}
}
sort.Sort(byPriorityWeight(addrs))
i := 0
for j := 1; j < len(addrs); j++ {
if addrs[i].Priority != addrs[j].Priority {
shuffleSRVByWeight(addrs[i:j])
i = j
}
}
shuffleSRVByWeight(addrs[i:len(addrs)])
return
}
// LookupMX returns the DNS MX records for the given domain name sorted by preference.
func LookupMX(name string) (mx []*MX, err os.Error) {
_, rr, err := lookup(name, dnsTypeMX)
if err != nil {
return
}
mx = make([]*MX, len(rr))
for i := range rr {
r := rr[i].(*dnsRR_MX)
mx[i] = &MX{r.Mx, r.Pref}
}
// Shuffle the records to match RFC 5321 when sorted
for i := range mx {
j := rand.Intn(i + 1)
mx[i], mx[j] = mx[j], mx[i]
}
sort.Sort(byPref(mx))
return
}
// LookupAddr performs a reverse lookup for the given address, returning a list
// of names mapping to that address.
func LookupAddr(addr string) (name []string, err os.Error) {
name = lookupStaticAddr(addr)
if len(name) > 0 {
return
}
var arpa string
arpa, err = reverseaddr(addr)
if err != nil {
return
}
var records []dnsRR
_, records, err = lookup(arpa, dnsTypePTR)
if err != nil {
return
}
name = make([]string, len(records))
for i := range records {
r := records[i].(*dnsRR_PTR)
name[i] = r.Ptr
}
return
}

86
src/pkg/net/resolv_windows.go → src/pkg/net/lookup_windows.go
View File

@ -14,8 +14,8 @@ import (
var hostentLock sync.Mutex var hostentLock sync.Mutex
var serventLock sync.Mutex var serventLock sync.Mutex
func goLookupHost(name string) (addrs []string, err os.Error) { func LookupHost(name string) (addrs []string, err os.Error) {
ips, err := goLookupIP(name) ips, err := LookupIP(name)
if err != nil { if err != nil {
return return
} }
@ -26,7 +26,7 @@ func goLookupHost(name string) (addrs []string, err os.Error) {
return return
} }
func goLookupIP(name string) (addrs []IP, err os.Error) { func LookupIP(name string) (addrs []IP, err os.Error) {
hostentLock.Lock() hostentLock.Lock()
defer hostentLock.Unlock() defer hostentLock.Unlock()
h, e := syscall.GetHostByName(name) h, e := syscall.GetHostByName(name)
@ -47,7 +47,23 @@ func goLookupIP(name string) (addrs []IP, err os.Error) {
return addrs, nil return addrs, nil
} }
func goLookupCNAME(name string) (cname string, err os.Error) { func LookupPort(network, service string) (port int, err os.Error) {
switch network {
case "tcp4", "tcp6":
network = "tcp"
case "udp4", "udp6":
network = "udp"
}
serventLock.Lock()
defer serventLock.Unlock()
s, e := syscall.GetServByName(service, network)
if e != 0 {
return 0, os.NewSyscallError("GetServByName", e)
}
return int(syscall.Ntohs(s.Port)), nil
}
func LookupCNAME(name string) (cname string, err os.Error) {
var r *syscall.DNSRecord var r *syscall.DNSRecord
e := syscall.DnsQuery(name, syscall.DNS_TYPE_CNAME, 0, nil, &r, nil) e := syscall.DnsQuery(name, syscall.DNS_TYPE_CNAME, 0, nil, &r, nil)
if int(e) != 0 { if int(e) != 0 {
@ -61,13 +77,6 @@ func goLookupCNAME(name string) (cname string, err os.Error) {
return return
} }
type SRV struct {
Target string
Port uint16
Priority uint16
Weight uint16
}
func LookupSRV(service, proto, name string) (cname string, addrs []*SRV, err os.Error) { func LookupSRV(service, proto, name string) (cname string, addrs []*SRV, err os.Error) {
var r *syscall.DNSRecord var r *syscall.DNSRecord
target := "_" + service + "._" + proto + "." + name target := "_" + service + "._" + proto + "." + name
@ -87,55 +96,12 @@ func LookupSRV(service, proto, name string) (cname string, addrs []*SRV, err os.
return name, addrs, nil return name, addrs, nil
} }
func goLookupPort(network, service string) (port int, err os.Error) { // TODO(brainman): implement LookupMX and LookupAddr.
switch network {
case "tcp4", "tcp6": func LookupMX(name string) (mx []*MX, err os.Error) {
network = "tcp" return nil, os.NewSyscallError("LookupMX", syscall.EWINDOWS)
case "udp4", "udp6":
network = "udp"
}
serventLock.Lock()
defer serventLock.Unlock()
s, e := syscall.GetServByName(service, network)
if e != 0 {
return 0, os.NewSyscallError("GetServByName", e)
}
return int(syscall.Ntohs(s.Port)), nil
} }
// TODO(brainman): Following code is only to get tests running. func LookupAddr(addr string) (name []string, err os.Error) {
return nil, os.NewSyscallError("LookupAddr", syscall.EWINDOWS)
func isDomainName(s string) bool {
panic("unimplemented")
} }
func reverseaddr(addr string) (arpa string, err os.Error) {
panic("unimplemented")
}
func answer(name, server string, dns *dnsMsg, qtype uint16) (cname string, addrs []dnsRR, err os.Error) {
panic("unimplemented")
}
// 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 {
if e == nil {
return "<nil>"
}
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 }

4
src/pkg/net/net_test.go
View File

@ -7,7 +7,6 @@ package net
import ( import (
"flag" "flag"
"regexp" "regexp"
"runtime"
"testing" "testing"
) )
@ -103,9 +102,6 @@ var revAddrTests = []struct {
} }
func TestReverseAddress(t *testing.T) { func TestReverseAddress(t *testing.T) {
if runtime.GOOS == "windows" {
return
}
for i, tt := range revAddrTests { for i, tt := range revAddrTests {
a, e := reverseaddr(tt.Addr) a, e := reverseaddr(tt.Addr)
if len(tt.ErrPrefix) > 0 && e == nil { if len(tt.ErrPrefix) > 0 && e == nil {