mirror of
https://github.com/kubenetworks/kubevpn.git
synced 2025-10-12 10:40:29 +08:00
141 lines
3.7 KiB
Go
141 lines
3.7 KiB
Go
/*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package dnstap
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import (
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"bytes"
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"encoding/json"
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"fmt"
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"net"
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"time"
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"github.com/miekg/dns"
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)
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type jsonTime time.Time
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func (jt *jsonTime) MarshalJSON() ([]byte, error) {
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stamp := time.Time(*jt).Format(time.RFC3339Nano)
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return []byte(fmt.Sprintf("\"%s\"", stamp)), nil
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}
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type jsonDnstap struct {
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Type string `json:"type"`
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Identity string `json:"identity,omitempty"`
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Version string `json:"version,omitempty"`
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Message jsonMessage `json:"message"`
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}
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type jsonMessage struct {
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Type string `json:"type"`
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QueryTime *jsonTime `json:"query_time,omitempty"`
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ResponseTime *jsonTime `json:"response_time,omitempty"`
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SocketFamily string `json:"socket_family,omitempty"`
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SocketProtocol string `json:"socket_protocol,omitempty"`
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QueryAddress *net.IP `json:"query_address,omitempty"`
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ResponseAddress *net.IP `json:"response_address,omitempty"`
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QueryPort uint32 `json:"query_port,omitempty"`
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ResponsePort uint32 `json:"response_port,omitempty"`
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QueryZone string `json:"query_zone,omitempty"`
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QueryMessage string `json:"query_message,omitempty"`
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ResponseMessage string `json:"response_message,omitempty"`
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}
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func convertJSONMessage(m *Message) jsonMessage {
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jMsg := jsonMessage{
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Type: fmt.Sprint(m.Type),
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SocketFamily: fmt.Sprint(m.SocketFamily),
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SocketProtocol: fmt.Sprint(m.SocketProtocol),
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}
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if m.QueryTimeSec != nil && m.QueryTimeNsec != nil {
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qt := jsonTime(time.Unix(int64(*m.QueryTimeSec), int64(*m.QueryTimeNsec)).UTC())
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jMsg.QueryTime = &qt
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}
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if m.ResponseTimeSec != nil && m.ResponseTimeNsec != nil {
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rt := jsonTime(time.Unix(int64(*m.ResponseTimeSec), int64(*m.ResponseTimeNsec)).UTC())
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jMsg.ResponseTime = &rt
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}
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if m.QueryAddress != nil {
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qa := net.IP(m.QueryAddress)
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jMsg.QueryAddress = &qa
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}
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if m.ResponseAddress != nil {
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ra := net.IP(m.ResponseAddress)
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jMsg.ResponseAddress = &ra
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}
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if m.QueryPort != nil {
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jMsg.QueryPort = *m.QueryPort
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}
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if m.ResponsePort != nil {
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jMsg.ResponsePort = *m.ResponsePort
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}
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if m.QueryZone != nil {
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name, _, err := dns.UnpackDomainName(m.QueryZone, 0)
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if err != nil {
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jMsg.QueryZone = fmt.Sprintf("parse failed: %v", err)
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} else {
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jMsg.QueryZone = string(name)
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}
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}
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if m.QueryMessage != nil {
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msg := new(dns.Msg)
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err := msg.Unpack(m.QueryMessage)
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if err != nil {
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jMsg.QueryMessage = fmt.Sprintf("parse failed: %v", err)
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} else {
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jMsg.QueryMessage = msg.String()
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}
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}
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if m.ResponseMessage != nil {
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msg := new(dns.Msg)
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err := msg.Unpack(m.ResponseMessage)
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if err != nil {
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jMsg.ResponseMessage = fmt.Sprintf("parse failed: %v", err)
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} else {
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jMsg.ResponseMessage = msg.String()
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}
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}
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return jMsg
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}
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// JSONFormat renders a Dnstap message in JSON format. Any encapsulated
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// DNS messages are rendered as strings in a format similar to 'dig' output.
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func JSONFormat(dt *Dnstap) (out []byte, ok bool) {
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var s bytes.Buffer
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j, err := json.Marshal(jsonDnstap{
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Type: fmt.Sprint(dt.Type),
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Identity: string(dt.Identity),
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Version: string(dt.Version),
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Message: convertJSONMessage(dt.Message),
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})
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if err != nil {
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return nil, false
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}
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s.WriteString(string(j) + "\n")
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return s.Bytes(), true
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}
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