1 files changed, 94 insertions, 0 deletions
diff --git a/goldap/control.go b/goldap/control.go
new file mode 100644
index 0000000..3f94b67
--- /dev/null
+++ b/goldap/control.go
@@ -0,0 +1,94 @@
+package message
+
+import (
+	"errors"
+	"fmt"
+)
+
+//
+//        Control ::= SEQUENCE {
+//             controlType             LDAPOID,
+//             criticality             BOOLEAN DEFAULT FALSE,
+//             controlValue            OCTET STRING OPTIONAL }
+
+func (control *Control) ControlType() LDAPOID {
+	return control.controlType
+}
+
+func (control *Control) Criticality() BOOLEAN {
+	return control.criticality
+}
+
+func (control *Control) ControlValue() *OCTETSTRING {
+	return control.controlValue
+}
+
+func readControl(bytes *Bytes) (control Control, err error) {
+	err = bytes.ReadSubBytes(classUniversal, tagSequence, control.readComponents)
+	if err != nil {
+		err = LdapError{fmt.Sprintf("readControl:\n%s", err.Error())}
+		return
+	}
+	return
+}
+
+func (control *Control) readComponents(bytes *Bytes) (err error) {
+	control.controlType, err = readLDAPOID(bytes)
+	if err != nil {
+		err = LdapError{fmt.Sprintf("readComponents:\n%s", err.Error())}
+		return
+	}
+	if bytes.HasMoreData() {
+		var tag TagAndLength
+		tag, err = bytes.PreviewTagAndLength()
+		if err != nil {
+			err = LdapError{fmt.Sprintf("readComponents:\n%s", err.Error())}
+			return
+		}
+		if tag.Tag == tagBoolean {
+			control.criticality, err = readBOOLEAN(bytes)
+			if err != nil {
+				err = LdapError{fmt.Sprintf("readComponents:\n%s", err.Error())}
+				return
+			}
+			if control.criticality == false {
+				err = errors.New(fmt.Sprintf("readComponents: criticality default value FALSE should not be specified"))
+				return
+			}
+		}
+	}
+	if bytes.HasMoreData() {
+		var octetstring OCTETSTRING
+		octetstring, err = readOCTETSTRING(bytes)
+		if err != nil {
+			err = LdapError{fmt.Sprintf("readComponents:\n%s", err.Error())}
+			return
+		}
+		control.controlValue = octetstring.Pointer()
+	}
+	return
+}
+
+func (control Control) write(bytes *Bytes) (size int) {
+	if control.controlValue != nil {
+		size += control.controlValue.write(bytes)
+	}
+	if control.criticality != BOOLEAN(false) {
+		size += control.criticality.write(bytes)
+	}
+	size += control.controlType.write(bytes)
+	size += bytes.WriteTagAndLength(classUniversal, isCompound, tagSequence, size)
+	return
+}
+
+func (control Control) size() (size int) {
+	if control.controlValue != nil {
+		size += control.controlValue.size()
+	}
+	if control.criticality != BOOLEAN(false) {
+		size += control.criticality.size()
+	}
+	size += control.controlType.size()
+	size += sizeTagAndLength(tagSequence, size)
+	return
+}