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deps: revendor

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Signed-off-by: Stephan Renatus <srenatus@chef.io>
This commit is contained in:
Stephan Renatus
2018-11-12 19:39:20 +01:00
parent 1723e13fed
commit 3295084236
18 changed files with 694 additions and 334 deletions
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210
vendor/gopkg.in/ldap.v2/conn.go generated vendored
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@@ -11,24 +11,34 @@ import (
"log"
"net"
"sync"
"sync/atomic"
"time"
"gopkg.in/asn1-ber.v1"
)
const (
MessageQuit = 0
MessageRequest = 1
// MessageQuit causes the processMessages loop to exit
MessageQuit = 0
// MessageRequest sends a request to the server
MessageRequest = 1
// MessageResponse receives a response from the server
MessageResponse = 2
MessageFinish = 3
MessageTimeout = 4
// MessageFinish indicates the client considers a particular message ID to be finished
MessageFinish = 3
// MessageTimeout indicates the client-specified timeout for a particular message ID has been reached
MessageTimeout = 4
)
// PacketResponse contains the packet or error encountered reading a response
type PacketResponse struct {
// Packet is the packet read from the server
Packet *ber.Packet
Error error
// Error is an error encountered while reading
Error error
}
// ReadPacket returns the packet or an error
func (pr *PacketResponse) ReadPacket() (*ber.Packet, error) {
if (pr == nil) || (pr.Packet == nil && pr.Error == nil) {
return nil, NewError(ErrorNetwork, errors.New("ldap: could not retrieve response"))
@@ -36,11 +46,31 @@ func (pr *PacketResponse) ReadPacket() (*ber.Packet, error) {
return pr.Packet, pr.Error
}
type messageContext struct {
id int64
// close(done) should only be called from finishMessage()
done chan struct{}
// close(responses) should only be called from processMessages(), and only sent to from sendResponse()
responses chan *PacketResponse
}
// sendResponse should only be called within the processMessages() loop which
// is also responsible for closing the responses channel.
func (msgCtx *messageContext) sendResponse(packet *PacketResponse) {
select {
case msgCtx.responses <- packet:
// Successfully sent packet to message handler.
case <-msgCtx.done:
// The request handler is done and will not receive more
// packets.
}
}
type messagePacket struct {
Op int
MessageID int64
Packet *ber.Packet
Channel chan *PacketResponse
Context *messageContext
}
type sendMessageFlags uint
@@ -53,19 +83,18 @@ const (
type Conn struct {
conn net.Conn
isTLS bool
isClosing bool
closing uint32
closeErr atomicValue
isStartingTLS bool
Debug debugging
chanConfirm chan bool
chanResults map[int64]chan *PacketResponse
chanConfirm chan struct{}
messageContexts map[int64]*messageContext
chanMessage chan *messagePacket
chanMessageID chan int64
wgSender sync.WaitGroup
wgClose sync.WaitGroup
once sync.Once
outstandingRequests uint
messageMutex sync.Mutex
requestTimeout time.Duration
requestTimeout int64
}
var _ Client = &Conn{}
@@ -111,28 +140,39 @@ func DialTLS(network, addr string, config *tls.Config) (*Conn, error) {
// NewConn returns a new Conn using conn for network I/O.
func NewConn(conn net.Conn, isTLS bool) *Conn {
return &Conn{
conn: conn,
chanConfirm: make(chan bool),
chanMessageID: make(chan int64),
chanMessage: make(chan *messagePacket, 10),
chanResults: map[int64]chan *PacketResponse{},
requestTimeout: 0,
isTLS: isTLS,
conn: conn,
chanConfirm: make(chan struct{}),
chanMessageID: make(chan int64),
chanMessage: make(chan *messagePacket, 10),
messageContexts: map[int64]*messageContext{},
requestTimeout: 0,
isTLS: isTLS,
}
}
// Start initializes goroutines to read responses and process messages
func (l *Conn) Start() {
go l.reader()
go l.processMessages()
l.wgClose.Add(1)
}
// isClosing returns whether or not we're currently closing.
func (l *Conn) isClosing() bool {
return atomic.LoadUint32(&l.closing) == 1
}
// setClosing sets the closing value to true
func (l *Conn) setClosing() bool {
return atomic.CompareAndSwapUint32(&l.closing, 0, 1)
}
// Close closes the connection.
func (l *Conn) Close() {
l.once.Do(func() {
l.isClosing = true
l.wgSender.Wait()
l.messageMutex.Lock()
defer l.messageMutex.Unlock()
if l.setClosing() {
l.Debug.Printf("Sending quit message and waiting for confirmation")
l.chanMessage <- &messagePacket{Op: MessageQuit}
<-l.chanConfirm
@@ -140,62 +180,56 @@ func (l *Conn) Close() {
l.Debug.Printf("Closing network connection")
if err := l.conn.Close(); err != nil {
log.Print(err)
log.Println(err)
}
l.wgClose.Done()
})
}
l.wgClose.Wait()
}
// Sets the time after a request is sent that a MessageTimeout triggers
// SetTimeout sets the time after a request is sent that a MessageTimeout triggers
func (l *Conn) SetTimeout(timeout time.Duration) {
if timeout > 0 {
l.requestTimeout = timeout
atomic.StoreInt64(&l.requestTimeout, int64(timeout))
}
}
// Returns the next available messageID
func (l *Conn) nextMessageID() int64 {
if l.chanMessageID != nil {
if messageID, ok := <-l.chanMessageID; ok {
return messageID
}
if messageID, ok := <-l.chanMessageID; ok {
return messageID
}
return 0
}
// StartTLS sends the command to start a TLS session and then creates a new TLS Client
func (l *Conn) StartTLS(config *tls.Config) error {
messageID := l.nextMessageID()
if l.isTLS {
return NewError(ErrorNetwork, errors.New("ldap: already encrypted"))
}
packet := ber.Encode(ber.ClassUniversal, ber.TypeConstructed, ber.TagSequence, nil, "LDAP Request")
packet.AppendChild(ber.NewInteger(ber.ClassUniversal, ber.TypePrimitive, ber.TagInteger, messageID, "MessageID"))
packet.AppendChild(ber.NewInteger(ber.ClassUniversal, ber.TypePrimitive, ber.TagInteger, l.nextMessageID(), "MessageID"))
request := ber.Encode(ber.ClassApplication, ber.TypeConstructed, ApplicationExtendedRequest, nil, "Start TLS")
request.AppendChild(ber.NewString(ber.ClassContext, ber.TypePrimitive, 0, "1.3.6.1.4.1.1466.20037", "TLS Extended Command"))
packet.AppendChild(request)
l.Debug.PrintPacket(packet)
channel, err := l.sendMessageWithFlags(packet, startTLS)
msgCtx, err := l.sendMessageWithFlags(packet, startTLS)
if err != nil {
return err
}
if channel == nil {
return NewError(ErrorNetwork, errors.New("ldap: could not send message"))
}
defer l.finishMessage(msgCtx)
l.Debug.Printf("%d: waiting for response", messageID)
defer l.finishMessage(messageID)
packetResponse, ok := <-channel
l.Debug.Printf("%d: waiting for response", msgCtx.id)
packetResponse, ok := <-msgCtx.responses
if !ok {
return NewError(ErrorNetwork, errors.New("ldap: channel closed"))
return NewError(ErrorNetwork, errors.New("ldap: response channel closed"))
}
packet, err = packetResponse.ReadPacket()
l.Debug.Printf("%d: got response %p", messageID, packet)
l.Debug.Printf("%d: got response %p", msgCtx.id, packet)
if err != nil {
return err
}
@@ -226,45 +260,51 @@ func (l *Conn) StartTLS(config *tls.Config) error {
return nil
}
func (l *Conn) sendMessage(packet *ber.Packet) (chan *PacketResponse, error) {
func (l *Conn) sendMessage(packet *ber.Packet) (*messageContext, error) {
return l.sendMessageWithFlags(packet, 0)
}
func (l *Conn) sendMessageWithFlags(packet *ber.Packet, flags sendMessageFlags) (chan *PacketResponse, error) {
if l.isClosing {
func (l *Conn) sendMessageWithFlags(packet *ber.Packet, flags sendMessageFlags) (*messageContext, error) {
if l.isClosing() {
return nil, NewError(ErrorNetwork, errors.New("ldap: connection closed"))
}
l.messageMutex.Lock()
l.Debug.Printf("flags&startTLS = %d", flags&startTLS)
if l.isStartingTLS {
l.messageMutex.Unlock()
return nil, NewError(ErrorNetwork, errors.New("ldap: connection is in startls phase."))
return nil, NewError(ErrorNetwork, errors.New("ldap: connection is in startls phase"))
}
if flags&startTLS != 0 {
if l.outstandingRequests != 0 {
l.messageMutex.Unlock()
return nil, NewError(ErrorNetwork, errors.New("ldap: cannot StartTLS with outstanding requests"))
} else {
l.isStartingTLS = true
}
l.isStartingTLS = true
}
l.outstandingRequests++
l.messageMutex.Unlock()
out := make(chan *PacketResponse)
responses := make(chan *PacketResponse)
messageID := packet.Children[0].Value.(int64)
message := &messagePacket{
Op: MessageRequest,
MessageID: packet.Children[0].Value.(int64),
MessageID: messageID,
Packet: packet,
Channel: out,
Context: &messageContext{
id: messageID,
done: make(chan struct{}),
responses: responses,
},
}
l.sendProcessMessage(message)
return out, nil
return message.Context, nil
}
func (l *Conn) finishMessage(messageID int64) {
if l.isClosing {
func (l *Conn) finishMessage(msgCtx *messageContext) {
close(msgCtx.done)
if l.isClosing() {
return
}
@@ -277,18 +317,18 @@ func (l *Conn) finishMessage(messageID int64) {
message := &messagePacket{
Op: MessageFinish,
MessageID: messageID,
MessageID: msgCtx.id,
}
l.sendProcessMessage(message)
}
func (l *Conn) sendProcessMessage(message *messagePacket) bool {
if l.isClosing {
l.messageMutex.Lock()
defer l.messageMutex.Unlock()
if l.isClosing() {
return false
}
l.wgSender.Add(1)
l.chanMessage <- message
l.wgSender.Done()
return true
}
@@ -297,13 +337,17 @@ func (l *Conn) processMessages() {
if err := recover(); err != nil {
log.Printf("ldap: recovered panic in processMessages: %v", err)
}
for messageID, channel := range l.chanResults {
for messageID, msgCtx := range l.messageContexts {
// If we are closing due to an error, inform anyone who
// is waiting about the error.
if l.isClosing() && l.closeErr.Load() != nil {
msgCtx.sendResponse(&PacketResponse{Error: l.closeErr.Load().(error)})
}
l.Debug.Printf("Closing channel for MessageID %d", messageID)
close(channel)
delete(l.chanResults, messageID)
close(msgCtx.responses)
delete(l.messageContexts, messageID)
}
close(l.chanMessageID)
l.chanConfirm <- true
close(l.chanConfirm)
}()
@@ -312,11 +356,7 @@ func (l *Conn) processMessages() {
select {
case l.chanMessageID <- messageID:
messageID++
case message, ok := <-l.chanMessage:
if !ok {
l.Debug.Printf("Shutting down - message channel is closed")
return
}
case message := <-l.chanMessage:
switch message.Op {
case MessageQuit:
l.Debug.Printf("Shutting down - quit message received")
@@ -324,24 +364,30 @@ func (l *Conn) processMessages() {
case MessageRequest:
// Add to message list and write to network
l.Debug.Printf("Sending message %d", message.MessageID)
l.chanResults[message.MessageID] = message.Channel
buf := message.Packet.Bytes()
_, err := l.conn.Write(buf)
if err != nil {
l.Debug.Printf("Error Sending Message: %s", err.Error())
message.Context.sendResponse(&PacketResponse{Error: fmt.Errorf("unable to send request: %s", err)})
close(message.Context.responses)
break
}
// Only add to messageContexts if we were able to
// successfully write the message.
l.messageContexts[message.MessageID] = message.Context
// Add timeout if defined
if l.requestTimeout > 0 {
requestTimeout := time.Duration(atomic.LoadInt64(&l.requestTimeout))
if requestTimeout > 0 {
go func() {
defer func() {
if err := recover(); err != nil {
log.Printf("ldap: recovered panic in RequestTimeout: %v", err)
}
}()
time.Sleep(l.requestTimeout)
time.Sleep(requestTimeout)
timeoutMessage := &messagePacket{
Op: MessageTimeout,
MessageID: message.MessageID,
@@ -351,26 +397,26 @@ func (l *Conn) processMessages() {
}
case MessageResponse:
l.Debug.Printf("Receiving message %d", message.MessageID)
if chanResult, ok := l.chanResults[message.MessageID]; ok {
chanResult <- &PacketResponse{message.Packet, nil}
if msgCtx, ok := l.messageContexts[message.MessageID]; ok {
msgCtx.sendResponse(&PacketResponse{message.Packet, nil})
} else {
log.Printf("Received unexpected message %d, %v", message.MessageID, l.isClosing)
log.Printf("Received unexpected message %d, %v", message.MessageID, l.isClosing())
ber.PrintPacket(message.Packet)
}
case MessageTimeout:
// Handle the timeout by closing the channel
// All reads will return immediately
if chanResult, ok := l.chanResults[message.MessageID]; ok {
chanResult <- &PacketResponse{message.Packet, errors.New("ldap: connection timed out")}
if msgCtx, ok := l.messageContexts[message.MessageID]; ok {
l.Debug.Printf("Receiving message timeout for %d", message.MessageID)
delete(l.chanResults, message.MessageID)
close(chanResult)
msgCtx.sendResponse(&PacketResponse{message.Packet, errors.New("ldap: connection timed out")})
delete(l.messageContexts, message.MessageID)
close(msgCtx.responses)
}
case MessageFinish:
l.Debug.Printf("Finished message %d", message.MessageID)
if chanResult, ok := l.chanResults[message.MessageID]; ok {
close(chanResult)
delete(l.chanResults, message.MessageID)
if msgCtx, ok := l.messageContexts[message.MessageID]; ok {
delete(l.messageContexts, message.MessageID)
close(msgCtx.responses)
}
}
}
@@ -396,7 +442,8 @@ func (l *Conn) reader() {
packet, err := ber.ReadPacket(l.conn)
if err != nil {
// A read error is expected here if we are closing the connection...
if !l.isClosing {
if !l.isClosing() {
l.closeErr.Store(fmt.Errorf("unable to read LDAP response packet: %s", err))
l.Debug.Printf("reader error: %s", err.Error())
}
return
@@ -419,6 +466,5 @@ func (l *Conn) reader() {
if !l.sendProcessMessage(message) {
return
}
}
}