package querylog import ( "fmt" "net" "strconv" "time" "github.com/AdguardTeam/golibs/log" "github.com/miekg/dns" ) // Get Client IP address func (l *queryLog) getClientIP(clientIP string) string { if l.conf.AnonymizeClientIP { ip := net.ParseIP(clientIP) if ip != nil { ip4 := ip.To4() const AnonymizeClientIP4Mask = 24 const AnonymizeClientIP6Mask = 112 if ip4 != nil { clientIP = ip4.Mask(net.CIDRMask(AnonymizeClientIP4Mask, 32)).String() } else { clientIP = ip.Mask(net.CIDRMask(AnonymizeClientIP6Mask, 128)).String() } } } return clientIP } // entriesToJSON - converts log entries to JSON func (l *queryLog) entriesToJSON(entries []*logEntry, oldest time.Time) map[string]interface{} { // init the response object var data = []map[string]interface{}{} // the elements order is already reversed (from newer to older) for i := 0; i < len(entries); i++ { entry := entries[i] jsonEntry := l.logEntryToJSONEntry(entry) data = append(data, jsonEntry) } var result = map[string]interface{}{} result["oldest"] = "" if !oldest.IsZero() { result["oldest"] = oldest.Format(time.RFC3339Nano) } result["data"] = data return result } func (l *queryLog) logEntryToJSONEntry(entry *logEntry) map[string]interface{} { var msg *dns.Msg if len(entry.Answer) > 0 { msg = new(dns.Msg) if err := msg.Unpack(entry.Answer); err != nil { log.Debug("Failed to unpack dns message answer: %s: %s", err, string(entry.Answer)) msg = nil } } jsonEntry := map[string]interface{}{ "reason": entry.Result.Reason.String(), "elapsedMs": strconv.FormatFloat(entry.Elapsed.Seconds()*1000, 'f', -1, 64), "time": entry.Time.Format(time.RFC3339Nano), "client": l.getClientIP(entry.IP), } jsonEntry["question"] = map[string]interface{}{ "host": entry.QHost, "type": entry.QType, "class": entry.QClass, } if msg != nil { jsonEntry["status"] = dns.RcodeToString[msg.Rcode] opt := msg.IsEdns0() dnssecOk := false if opt != nil { dnssecOk = opt.Do() } jsonEntry["answer_dnssec"] = dnssecOk } if len(entry.Result.Rule) > 0 { jsonEntry["rule"] = entry.Result.Rule jsonEntry["filterId"] = entry.Result.FilterID } if len(entry.Result.ServiceName) != 0 { jsonEntry["service_name"] = entry.Result.ServiceName } answers := answerToMap(msg) if answers != nil { jsonEntry["answer"] = answers } if len(entry.OrigAnswer) != 0 { a := new(dns.Msg) err := a.Unpack(entry.OrigAnswer) if err == nil { answers = answerToMap(a) if answers != nil { jsonEntry["original_answer"] = answers } } else { log.Debug("Querylog: msg.Unpack(entry.OrigAnswer): %s: %s", err, string(entry.OrigAnswer)) } } return jsonEntry } func answerToMap(a *dns.Msg) []map[string]interface{} { if a == nil || len(a.Answer) == 0 { return nil } var answers = []map[string]interface{}{} for _, k := range a.Answer { header := k.Header() answer := map[string]interface{}{ "type": dns.TypeToString[header.Rrtype], "ttl": header.Ttl, } // try most common record types switch v := k.(type) { case *dns.A: answer["value"] = v.A.String() case *dns.AAAA: answer["value"] = v.AAAA.String() case *dns.MX: answer["value"] = fmt.Sprintf("%v %v", v.Preference, v.Mx) case *dns.CNAME: answer["value"] = v.Target case *dns.NS: answer["value"] = v.Ns case *dns.SPF: answer["value"] = v.Txt case *dns.TXT: answer["value"] = v.Txt case *dns.PTR: answer["value"] = v.Ptr case *dns.SOA: answer["value"] = fmt.Sprintf("%v %v %v %v %v %v %v", v.Ns, v.Mbox, v.Serial, v.Refresh, v.Retry, v.Expire, v.Minttl) case *dns.CAA: answer["value"] = fmt.Sprintf("%v %v \"%v\"", v.Flag, v.Tag, v.Value) case *dns.HINFO: answer["value"] = fmt.Sprintf("\"%v\" \"%v\"", v.Cpu, v.Os) case *dns.RRSIG: answer["value"] = fmt.Sprintf("%v %v %v %v %v %v %v %v %v", dns.TypeToString[v.TypeCovered], v.Algorithm, v.Labels, v.OrigTtl, v.Expiration, v.Inception, v.KeyTag, v.SignerName, v.Signature) default: // type unknown, marshall it as-is answer["value"] = v } answers = append(answers, answer) } return answers }