mirror of
https://github.com/kubenetworks/kubevpn.git
synced 2025-10-12 10:40:29 +08:00
119 lines
3.5 KiB
Go
119 lines
3.5 KiB
Go
/*
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* Copyright (c) 2013-2014 by Farsight Security, Inc.
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*
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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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"fmt"
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"net"
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"strconv"
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"strings"
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"time"
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"github.com/miekg/dns"
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)
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const yamlTimeFormat = "2006-01-02 15:04:05.999999999"
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func yamlConvertMessage(m *Message, s *bytes.Buffer) {
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s.WriteString(fmt.Sprint(" type: ", m.Type, "\n"))
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if m.QueryTimeSec != nil && m.QueryTimeNsec != nil {
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t := time.Unix(int64(*m.QueryTimeSec), int64(*m.QueryTimeNsec)).UTC()
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s.WriteString(fmt.Sprint(" query_time: !!timestamp ", t.Format(yamlTimeFormat), "\n"))
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}
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if m.ResponseTimeSec != nil && m.ResponseTimeNsec != nil {
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t := time.Unix(int64(*m.ResponseTimeSec), int64(*m.ResponseTimeNsec)).UTC()
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s.WriteString(fmt.Sprint(" response_time: !!timestamp ", t.Format(yamlTimeFormat), "\n"))
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}
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if m.SocketFamily != nil {
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s.WriteString(fmt.Sprint(" socket_family: ", m.SocketFamily, "\n"))
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}
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if m.SocketProtocol != nil {
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s.WriteString(fmt.Sprint(" socket_protocol: ", m.SocketProtocol, "\n"))
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}
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if m.QueryAddress != nil {
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s.WriteString(fmt.Sprint(" query_address: ", net.IP(m.QueryAddress), "\n"))
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}
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if m.ResponseAddress != nil {
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s.WriteString(fmt.Sprint(" response_address: ", net.IP(m.ResponseAddress), "\n"))
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}
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if m.QueryPort != nil {
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s.WriteString(fmt.Sprint(" query_port: ", *m.QueryPort, "\n"))
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}
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if m.ResponsePort != nil {
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s.WriteString(fmt.Sprint(" response_port: ", *m.ResponsePort, "\n"))
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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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fmt.Fprintf(s, " # query_zone: parse failed: %v\n", err)
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} else {
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s.WriteString(fmt.Sprint(" query_zone: ", strconv.Quote(name), "\n"))
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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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fmt.Fprintf(s, " # query_message: parse failed: %v\n", err)
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} else {
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s.WriteString(" query_message: |\n")
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s.WriteString(" " + strings.Replace(strings.TrimSpace(msg.String()), "\n", "\n ", -1) + "\n")
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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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fmt.Fprintf(s, " # response_message: parse failed: %v\n", err)
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} else {
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s.WriteString(" response_message: |\n")
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s.WriteString(" " + strings.Replace(strings.TrimSpace(msg.String()), "\n", "\n ", -1) + "\n")
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}
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}
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s.WriteString("---\n")
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}
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// YamlFormat renders a dnstap message in YAML format. Any encapsulated DNS
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// messages are rendered as strings in a format similar to 'dig' output.
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func YamlFormat(dt *Dnstap) (out []byte, ok bool) {
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var s bytes.Buffer
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s.WriteString(fmt.Sprint("type: ", dt.Type, "\n"))
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if dt.Identity != nil {
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s.WriteString(fmt.Sprint("identity: ", strconv.Quote(string(dt.Identity)), "\n"))
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}
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if dt.Version != nil {
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s.WriteString(fmt.Sprint("version: ", strconv.Quote(string(dt.Version)), "\n"))
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}
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if *dt.Type == Dnstap_MESSAGE {
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s.WriteString("message:\n")
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yamlConvertMessage(dt.Message, &s)
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}
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return s.Bytes(), true
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}
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