Bump version to 5.11.0

vendor/github.com/go-ldap/ldap/v3/response.go

@@ -0,0 +1,207 @@
+package ldap
+
+import (
+	"context"
+	"errors"
+	"fmt"
+
+	ber "github.com/go-asn1-ber/asn1-ber"
+)
+
+// Response defines an interface to get data from an LDAP server
+type Response interface {
+	Entry() *Entry
+	Referral() string
+	Controls() []Control
+	Err() error
+	Next() bool
+}
+
+type searchResponse struct {
+	conn *Conn
+	ch   chan *SearchSingleResult
+
+	entry    *Entry
+	referral string
+	controls []Control
+	err      error
+}
+
+// Entry returns an entry from the given search request
+func (r *searchResponse) Entry() *Entry {
+	return r.entry
+}
+
+// Referral returns a referral from the given search request
+func (r *searchResponse) Referral() string {
+	return r.referral
+}
+
+// Controls returns controls from the given search request
+func (r *searchResponse) Controls() []Control {
+	return r.controls
+}
+
+// Err returns an error when the given search request was failed
+func (r *searchResponse) Err() error {
+	return r.err
+}
+
+// Next returns whether next data exist or not
+func (r *searchResponse) Next() bool {
+	res, ok := <-r.ch
+	if !ok {
+		return false
+	}
+	if res == nil {
+		return false
+	}
+	r.err = res.Error
+	if r.err != nil {
+		return false
+	}
+	r.entry = res.Entry
+	r.referral = res.Referral
+	r.controls = res.Controls
+	return true
+}
+
+func (r *searchResponse) start(ctx context.Context, searchRequest *SearchRequest) {
+	go func() {
+		defer func() {
+			close(r.ch)
+			if err := recover(); err != nil {
+				r.conn.err = fmt.Errorf("ldap: recovered panic in searchResponse: %v", err)
+			}
+		}()
+
+		if r.conn.IsClosing() {
+			return
+		}
+
+		packet := ber.Encode(ber.ClassUniversal, ber.TypeConstructed, ber.TagSequence, nil, "LDAP Request")
+		packet.AppendChild(ber.NewInteger(ber.ClassUniversal, ber.TypePrimitive, ber.TagInteger, r.conn.nextMessageID(), "MessageID"))
+		// encode search request
+		err := searchRequest.appendTo(packet)
+		if err != nil {
+			r.ch <- &SearchSingleResult{Error: err}
+			return
+		}
+		r.conn.Debug.PrintPacket(packet)
+
+		msgCtx, err := r.conn.sendMessage(packet)
+		if err != nil {
+			r.ch <- &SearchSingleResult{Error: err}
+			return
+		}
+		defer r.conn.finishMessage(msgCtx)
+
+		foundSearchSingleResultDone := false
+		for !foundSearchSingleResultDone {
+			select {
+			case <-ctx.Done():
+				r.conn.Debug.Printf("%d: %s", msgCtx.id, ctx.Err().Error())
+				return
+			default:
+				r.conn.Debug.Printf("%d: waiting for response", msgCtx.id)
+				packetResponse, ok := <-msgCtx.responses
+				if !ok {
+					err := NewError(ErrorNetwork, errors.New("ldap: response channel closed"))
+					r.ch <- &SearchSingleResult{Error: err}
+					return
+				}
+				packet, err = packetResponse.ReadPacket()
+				r.conn.Debug.Printf("%d: got response %p", msgCtx.id, packet)
+				if err != nil {
+					r.ch <- &SearchSingleResult{Error: err}
+					return
+				}
+
+				if r.conn.Debug {
+					if err := addLDAPDescriptions(packet); err != nil {
+						r.ch <- &SearchSingleResult{Error: err}
+						return
+					}
+					ber.PrintPacket(packet)
+				}
+
+				switch packet.Children[1].Tag {
+				case ApplicationSearchResultEntry:
+					result := &SearchSingleResult{
+						Entry: &Entry{
+							DN:         packet.Children[1].Children[0].Value.(string),
+							Attributes: unpackAttributes(packet.Children[1].Children[1].Children),
+						},
+					}
+					if len(packet.Children) != 3 {
+						r.ch <- result
+						continue
+					}
+					decoded, err := DecodeControl(packet.Children[2].Children[0])
+					if err != nil {
+						werr := fmt.Errorf("failed to decode search result entry: %w", err)
+						result.Error = werr
+						r.ch <- result
+						return
+					}
+					result.Controls = append(result.Controls, decoded)
+					r.ch <- result
+
+				case ApplicationSearchResultDone:
+					if err := GetLDAPError(packet); err != nil {
+						r.ch <- &SearchSingleResult{Error: err}
+						return
+					}
+					if len(packet.Children) == 3 {
+						result := &SearchSingleResult{}
+						for _, child := range packet.Children[2].Children {
+							decodedChild, err := DecodeControl(child)
+							if err != nil {
+								werr := fmt.Errorf("failed to decode child control: %w", err)
+								r.ch <- &SearchSingleResult{Error: werr}
+								return
+							}
+							result.Controls = append(result.Controls, decodedChild)
+						}
+						r.ch <- result
+					}
+					foundSearchSingleResultDone = true
+
+				case ApplicationSearchResultReference:
+					ref := packet.Children[1].Children[0].Value.(string)
+					r.ch <- &SearchSingleResult{Referral: ref}
+
+				case ApplicationIntermediateResponse:
+					decoded, err := DecodeControl(packet.Children[1])
+					if err != nil {
+						werr := fmt.Errorf("failed to decode intermediate response: %w", err)
+						r.ch <- &SearchSingleResult{Error: werr}
+						return
+					}
+					result := &SearchSingleResult{}
+					result.Controls = append(result.Controls, decoded)
+					r.ch <- result
+
+				default:
+					err := fmt.Errorf("unknown tag: %d", packet.Children[1].Tag)
+					r.ch <- &SearchSingleResult{Error: err}
+					return
+				}
+			}
+		}
+		r.conn.Debug.Printf("%d: returning", msgCtx.id)
+	}()
+}
+
+func newSearchResponse(conn *Conn, bufferSize int) *searchResponse {
+	var ch chan *SearchSingleResult
+	if bufferSize > 0 {
+		ch = make(chan *SearchSingleResult, bufferSize)
+	} else {
+		ch = make(chan *SearchSingleResult)
+	}
+	return &searchResponse{
+		conn: conn,
+		ch:   ch,
+	}
+}