package querylog import ( "fmt" "net" "strconv" "strings" "time" "github.com/AdguardTeam/AdGuardHome/internal/dnsfilter" "github.com/AdguardTeam/golibs/log" "github.com/miekg/dns" ) // TODO(a.garipov): Use a proper structured approach here. // Get Client IP address func (l *queryLog) getClientIP(ip net.IP) (clientIP net.IP) { if l.conf.AnonymizeClientIP && ip != nil { const AnonymizeClientIPv4Mask = 16 const AnonymizeClientIPv6Mask = 112 if ip.To4() != nil { return ip.Mask(net.CIDRMask(AnonymizeClientIPv4Mask, 32)) } return ip.Mask(net.CIDRMask(AnonymizeClientIPv6Mask, 128)) } return ip } // jobject is a JSON object alias. type jobject = map[string]interface{} // entriesToJSON converts query log entries to JSON. func (l *queryLog) entriesToJSON(entries []*logEntry, oldest time.Time) (res jobject) { data := []jobject{} // 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) } res = jobject{ "data": data, "oldest": "", } if !oldest.IsZero() { res["oldest"] = oldest.Format(time.RFC3339Nano) } return res } func (l *queryLog) logEntryToJSONEntry(entry *logEntry) (jsonEntry jobject) { 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 = jobject{ "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), "client_info": entry.client, "client_proto": entry.ClientProto, "upstream": entry.Upstream, "question": jobject{ "host": entry.QHost, "type": entry.QType, "class": entry.QClass, }, } if entry.ClientID != "" { jsonEntry["client_id"] = entry.ClientID } if msg != nil { jsonEntry["status"] = dns.RcodeToString[msg.Rcode] opt := msg.IsEdns0() dnssecOk := false if opt != nil { dnssecOk = opt.Do() } jsonEntry["answer_dnssec"] = dnssecOk } jsonEntry["rules"] = resultRulesToJSONRules(entry.Result.Rules) if len(entry.Result.Rules) > 0 && len(entry.Result.Rules[0].Text) > 0 { jsonEntry["rule"] = entry.Result.Rules[0].Text jsonEntry["filterId"] = entry.Result.Rules[0].FilterListID } 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 resultRulesToJSONRules(rules []*dnsfilter.ResultRule) (jsonRules []jobject) { jsonRules = make([]jobject, len(rules)) for i, r := range rules { jsonRules[i] = jobject{ "filter_list_id": r.FilterListID, "text": r.Text, } } return jsonRules } type dnsAnswer struct { Type string `json:"type"` Value string `json:"value"` TTL uint32 `json:"ttl"` } func answerToMap(a *dns.Msg) (answers []*dnsAnswer) { if a == nil || len(a.Answer) == 0 { return nil } answers = make([]*dnsAnswer, 0, len(a.Answer)) for _, k := range a.Answer { header := k.Header() answer := &dnsAnswer{ Type: dns.TypeToString[header.Rrtype], TTL: header.Ttl, } // Some special treatment for some well-known types. // // TODO(a.garipov): Consider just calling String() for everyone // instead. switch v := k.(type) { case nil: // Probably unlikely, but go on. 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 = strings.Join(v.Txt, "\n") case *dns.TXT: answer.Value = strings.Join(v.Txt, "\n") 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: answer.Value = v.String() } answers = append(answers, answer) } return answers }