feat: add vendor

vendor/github.com/dnstap/golang-dnstap/JsonFormat.go

@@ -0,0 +1,140 @@
+/*
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package dnstap
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"net"
+	"time"
+
+	"github.com/miekg/dns"
+)
+
+type jsonTime time.Time
+
+func (jt *jsonTime) MarshalJSON() ([]byte, error) {
+	stamp := time.Time(*jt).Format(time.RFC3339Nano)
+	return []byte(fmt.Sprintf("\"%s\"", stamp)), nil
+}
+
+type jsonDnstap struct {
+	Type     string      `json:"type"`
+	Identity string      `json:"identity,omitempty"`
+	Version  string      `json:"version,omitempty"`
+	Message  jsonMessage `json:"message"`
+}
+
+type jsonMessage struct {
+	Type            string    `json:"type"`
+	QueryTime       *jsonTime `json:"query_time,omitempty"`
+	ResponseTime    *jsonTime `json:"response_time,omitempty"`
+	SocketFamily    string    `json:"socket_family,omitempty"`
+	SocketProtocol  string    `json:"socket_protocol,omitempty"`
+	QueryAddress    *net.IP   `json:"query_address,omitempty"`
+	ResponseAddress *net.IP   `json:"response_address,omitempty"`
+	QueryPort       uint32    `json:"query_port,omitempty"`
+	ResponsePort    uint32    `json:"response_port,omitempty"`
+	QueryZone       string    `json:"query_zone,omitempty"`
+	QueryMessage    string    `json:"query_message,omitempty"`
+	ResponseMessage string    `json:"response_message,omitempty"`
+}
+
+func convertJSONMessage(m *Message) jsonMessage {
+	jMsg := jsonMessage{
+		Type:           fmt.Sprint(m.Type),
+		SocketFamily:   fmt.Sprint(m.SocketFamily),
+		SocketProtocol: fmt.Sprint(m.SocketProtocol),
+	}
+
+	if m.QueryTimeSec != nil && m.QueryTimeNsec != nil {
+		qt := jsonTime(time.Unix(int64(*m.QueryTimeSec), int64(*m.QueryTimeNsec)).UTC())
+		jMsg.QueryTime = &qt
+	}
+
+	if m.ResponseTimeSec != nil && m.ResponseTimeNsec != nil {
+		rt := jsonTime(time.Unix(int64(*m.ResponseTimeSec), int64(*m.ResponseTimeNsec)).UTC())
+		jMsg.ResponseTime = &rt
+	}
+
+	if m.QueryAddress != nil {
+		qa := net.IP(m.QueryAddress)
+		jMsg.QueryAddress = &qa
+	}
+
+	if m.ResponseAddress != nil {
+		ra := net.IP(m.ResponseAddress)
+		jMsg.ResponseAddress = &ra
+	}
+
+	if m.QueryPort != nil {
+		jMsg.QueryPort = *m.QueryPort
+	}
+
+	if m.ResponsePort != nil {
+		jMsg.ResponsePort = *m.ResponsePort
+	}
+
+	if m.QueryZone != nil {
+		name, _, err := dns.UnpackDomainName(m.QueryZone, 0)
+		if err != nil {
+			jMsg.QueryZone = fmt.Sprintf("parse failed: %v", err)
+		} else {
+			jMsg.QueryZone = string(name)
+		}
+	}
+
+	if m.QueryMessage != nil {
+		msg := new(dns.Msg)
+		err := msg.Unpack(m.QueryMessage)
+		if err != nil {
+			jMsg.QueryMessage = fmt.Sprintf("parse failed: %v", err)
+		} else {
+			jMsg.QueryMessage = msg.String()
+		}
+	}
+
+	if m.ResponseMessage != nil {
+		msg := new(dns.Msg)
+		err := msg.Unpack(m.ResponseMessage)
+		if err != nil {
+			jMsg.ResponseMessage = fmt.Sprintf("parse failed: %v", err)
+		} else {
+			jMsg.ResponseMessage = msg.String()
+		}
+	}
+	return jMsg
+}
+
+// JSONFormat renders a Dnstap message in JSON format. Any encapsulated
+// DNS messages are rendered as strings in a format similar to 'dig' output.
+func JSONFormat(dt *Dnstap) (out []byte, ok bool) {
+	var s bytes.Buffer
+
+	j, err := json.Marshal(jsonDnstap{
+		Type:     fmt.Sprint(dt.Type),
+		Identity: string(dt.Identity),
+		Version:  string(dt.Version),
+		Message:  convertJSONMessage(dt.Message),
+	})
+	if err != nil {
+		return nil, false
+	}
+
+	s.WriteString(string(j) + "\n")
+
+	return s.Bytes(), true
+}