Added TTL values

go.mod

@@ -4,6 +4,7 @@ go 1.23.3
 
 require (
 	github.com/acidvegas/golcg v1.0.1
+	github.com/miekg/dns v1.1.62
 	github.com/rivo/tview v0.0.0-20241103174730-c76f7879f592
 )
 
@@ -13,7 +14,11 @@ require (
 	github.com/lucasb-eyer/go-colorful v1.2.0 // indirect
 	github.com/mattn/go-runewidth v0.0.15 // indirect
 	github.com/rivo/uniseg v0.4.7 // indirect
-	golang.org/x/sys v0.17.0 // indirect
+	golang.org/x/mod v0.18.0 // indirect
-	golang.org/x/term v0.17.0 // indirect
+	golang.org/x/net v0.27.0 // indirect
-	golang.org/x/text v0.14.0 // indirect
+	golang.org/x/sync v0.7.0 // indirect
+	golang.org/x/sys v0.22.0 // indirect
+	golang.org/x/term v0.22.0 // indirect
+	golang.org/x/text v0.16.0 // indirect
+	golang.org/x/tools v0.22.0 // indirect
 )

go.sum

@@ -8,6 +8,8 @@ github.com/lucasb-eyer/go-colorful v1.2.0 h1:1nnpGOrhyZZuNyfu1QjKiUICQ74+3FNCN69
 github.com/lucasb-eyer/go-colorful v1.2.0/go.mod h1:R4dSotOR9KMtayYi1e77YzuveK+i7ruzyGqttikkLy0=
 github.com/mattn/go-runewidth v0.0.15 h1:UNAjwbU9l54TA3KzvqLGxwWjHmMgBUVhBiTjelZgg3U=
 github.com/mattn/go-runewidth v0.0.15/go.mod h1:Jdepj2loyihRzMpdS35Xk/zdY8IAYHsh153qUoGf23w=
+github.com/miekg/dns v1.1.62 h1:cN8OuEF1/x5Rq6Np+h1epln8OiyPWV+lROx9LxcGgIQ=
+github.com/miekg/dns v1.1.62/go.mod h1:mvDlcItzm+br7MToIKqkglaGhlFMHJ9DTNNWONWXbNQ=
 github.com/rivo/tview v0.0.0-20241103174730-c76f7879f592 h1:YIJ+B1hePP6AgynC5TcqpO0H9k3SSoZa2BGyL6vDUzM=
 github.com/rivo/tview v0.0.0-20241103174730-c76f7879f592/go.mod h1:02iFIz7K/A9jGCvrizLPvoqr4cEIx7q54RH5Qudkrss=
 github.com/rivo/uniseg v0.2.0/go.mod h1:J6wj4VEh+S6ZtnVlnTBMWIodfgj8LQOQFoIToxlJtxc=
@@ -19,34 +21,45 @@ golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACk
 golang.org/x/crypto v0.0.0-20210921155107-089bfa567519/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
 golang.org/x/mod v0.6.0-dev.0.20220419223038-86c51ed26bb4/go.mod h1:jJ57K6gSWd91VN4djpZkiMVwK6gcyfeH4XE8wZrZaV4=
 golang.org/x/mod v0.8.0/go.mod h1:iBbtSCu2XBx23ZKBPSOrRkjjQPZFPuis4dIYUhu/chs=
+golang.org/x/mod v0.18.0 h1:5+9lSbEzPSdWkH32vYPBwEpX8KwDbM52Ud9xBUvNlb0=
+golang.org/x/mod v0.18.0/go.mod h1:hTbmBsO62+eylJbnUtE2MGJUyE7QWk4xUqPFrRgJ+7c=
 golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/net v0.0.0-20210226172049-e18ecbb05110/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
 golang.org/x/net v0.0.0-20220722155237-a158d28d115b/go.mod h1:XRhObCWvk6IyKnWLug+ECip1KBveYUHfp+8e9klMJ9c=
 golang.org/x/net v0.6.0/go.mod h1:2Tu9+aMcznHK/AK1HMvgo6xiTLG5rD5rZLDS+rp2Bjs=
+golang.org/x/net v0.27.0 h1:5K3Njcw06/l2y9vpGCSdcxWOYHOUk3dVNGDXN+FvAys=
+golang.org/x/net v0.27.0/go.mod h1:dDi0PyhWNoiUOrAS8uXv/vnScO4wnHQO4mj9fn/RytE=
 golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20220722155255-886fb9371eb4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.1.0/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.7.0 h1:YsImfSBoP9QPYL0xyKJPq0gcaJdG3rInoqxTWbfQu9M=
+golang.org/x/sync v0.7.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20220520151302-bc2c85ada10a/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20220722155257-8c9f86f7a55f/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.5.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.17.0 h1:25cE3gD+tdBA7lp7QfhuV+rJiE9YXTcS3VG1SqssI/Y=
 golang.org/x/sys v0.17.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+golang.org/x/sys v0.22.0 h1:RI27ohtqKCnwULzJLqkv897zojh5/DwS/ENaMzUOaWI=
+golang.org/x/sys v0.22.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
 golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
 golang.org/x/term v0.5.0/go.mod h1:jMB1sMXY+tzblOD4FWmEbocvup2/aLOaQEp7JmGp78k=
-golang.org/x/term v0.17.0 h1:mkTF7LCd6WGJNL3K1Ad7kwxNfYAW6a8a8QqtMblp/4U=
 golang.org/x/term v0.17.0/go.mod h1:lLRBjIVuehSbZlaOtGMbcMncT+aqLLLmKrsjNrUguwk=
+golang.org/x/term v0.22.0 h1:BbsgPEJULsl2fV/AT3v15Mjva5yXKQDyKf+TbDz7QJk=
+golang.org/x/term v0.22.0/go.mod h1:F3qCibpT5AMpCRfhfT53vVJwhLtIVHhB9XDjfFvnMI4=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
 golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=
 golang.org/x/text v0.7.0/go.mod h1:mrYo+phRRbMaCq/xk9113O4dZlRixOauAjOtrjsXDZ8=
-golang.org/x/text v0.14.0 h1:ScX5w1eTa3QqT8oi6+ziP7dTV1S2+ALU0bI+0zXKWiQ=
 golang.org/x/text v0.14.0/go.mod h1:18ZOQIKpY8NJVqYksKHtTdi31H5itFRjB5/qKTNYzSU=
+golang.org/x/text v0.16.0 h1:a94ExnEXNtEwYLGJSIUxnWoxoRz/ZcCsV63ROupILh4=
+golang.org/x/text v0.16.0/go.mod h1:GhwF1Be+LQoKShO3cGOHzqOgRrGaYc9AvblQOmPVHnI=
 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc=
 golang.org/x/tools v0.6.0/go.mod h1:Xwgl3UAJ/d3gWutnCtw505GrjyAbvKui8lOU390QaIU=
+golang.org/x/tools v0.22.0 h1:gqSGLZqv+AI9lIQzniJ0nZDRG5GBPsSi+DRNHWNz6yA=
+golang.org/x/tools v0.22.0/go.mod h1:aCwcsjqvq7Yqt6TNyX7QMU2enbQ/Gt0bo6krSeEri+c=
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=

ptrstream.go

@@ -2,7 +2,6 @@ package main
 
 import (
 	"bufio"
-	"context"
 	"encoding/json"
 	"flag"
 	"fmt"
@@ -17,6 +16,7 @@ import (
 	"time"
 
 	"github.com/acidvegas/golcg"
+	"github.com/miekg/dns"
 	"github.com/rivo/tview"
 )
 
@@ -146,6 +146,7 @@ type DNSResponse struct {
 	Server     string
 	RecordType string // "PTR" or "CNAME"
 	Target     string // For CNAME records, stores the target
+	TTL        uint32 // Add TTL field
 }
 
 func lookupWithRetry(ip string, cfg *Config) (DNSResponse, error) {
@@ -157,50 +158,76 @@ func lookupWithRetry(ip string, cfg *Config) (DNSResponse, error) {
 			return DNSResponse{}, fmt.Errorf("no DNS servers available")
 		}
 
-		r := &net.Resolver{
+		// Create DNS message
-			PreferGo: true,
+		m := new(dns.Msg)
-			Dial: func(ctx context.Context, network, address string) (net.Conn, error) {
+		arpa, err := dns.ReverseAddr(ip)
-				d := net.Dialer{
+		if err != nil {
-					Timeout: cfg.timeout,
+			return DNSResponse{}, err
 		}
-				return d.DialContext(ctx, "udp", server)
+		m.SetQuestion(arpa, dns.TypePTR)
-			},
+		m.RecursionDesired = true
+
+		// Create DNS client
+		c := new(dns.Client)
+		c.Timeout = cfg.timeout
+
+		// Make the query
+		r, _, err := c.Exchange(m, server)
+		if err != nil {
+			lastErr = err
+			continue
 		}
 
-		ctx, cancel := context.WithTimeout(context.Background(), cfg.timeout)
+		if r.Rcode != dns.RcodeSuccess {
-		names, err := r.LookupAddr(ctx, ip)
+			lastErr = fmt.Errorf("DNS query failed with code: %d", r.Rcode)
-		cancel()
+			continue
+		}
 
-		if err == nil {
 		logServer := server
 		if idx := strings.Index(server, ":"); idx != -1 {
 			logServer = server[:idx]
 		}
 
-			// Check if any of the names is a CNAME
+		// Process the response
-			for _, name := range names {
+		if len(r.Answer) > 0 {
-				ctx, cancel := context.WithTimeout(context.Background(), cfg.timeout)
+			var names []string
-				cname, err := r.LookupCNAME(ctx, strings.TrimSuffix(name, "."))
+			var ttl uint32
-				cancel()
+			var isCNAME bool
+			var target string
 
-				if err == nil && cname != name {
+			for _, ans := range r.Answer {
+				switch rr := ans.(type) {
+				case *dns.PTR:
+					names = append(names, rr.Ptr)
+					ttl = rr.Hdr.Ttl
+				case *dns.CNAME:
+					isCNAME = true
+					names = append(names, rr.Hdr.Name)
+					target = rr.Target
+					ttl = rr.Hdr.Ttl
+				}
+			}
+
+			if len(names) > 0 {
+				if isCNAME {
 					return DNSResponse{
 						Names:      names,
 						Server:     logServer,
 						RecordType: "CNAME",
-						Target:     strings.TrimSuffix(cname, "."),
+						Target:     strings.TrimSuffix(target, "."),
+						TTL:        ttl,
 					}, nil
 				}
-			}
-
 				return DNSResponse{
 					Names:      names,
 					Server:     logServer,
 					RecordType: "PTR",
+					TTL:        ttl,
 				}, nil
 			}
+		}
 
-		lastErr = err
+		lastErr = fmt.Errorf("no PTR records found")
 	}
 
 	return DNSResponse{}, lastErr
@@ -356,7 +383,7 @@ func worker(jobs <-chan string, wg *sync.WaitGroup, cfg *Config, stats *Stats, t
 			continue
 		}
 
-		writeNDJSON(cfg, timestamp, ip, response.Server, ptr, response.RecordType, response.Target)
+		writeNDJSON(cfg, timestamp, ip, response.Server, ptr, response.RecordType, response.Target, response.TTL)
 
 		timeStr := time.Now().Format("2006-01-02 15:04:05")
 		recordTypeColor := "[blue] PTR [-]"
@@ -368,17 +395,19 @@ func worker(jobs <-chan string, wg *sync.WaitGroup, cfg *Config, stats *Stats, t
 
 		var line string
 		if len(cfg.dnsServers) > 0 {
-			line = fmt.Sprintf("[gray]%s [gray]│[-] [purple]%15s[-] [gray]│[-] [yellow]%-15s[-] [gray]│[-] %-5s [gray]│[-] %s\n",
+			line = fmt.Sprintf("[gray]%s [gray]│[-] [purple]%15s[-] [gray]│[-] [yellow]%-15s[-] [gray]│[-] %-5s [gray]│[-] [white]%-6d[-] [gray]│[-] %s\n",
 				timeStr,
 				ip,
 				response.Server,
 				recordTypeColor,
+				response.TTL,
 				colorizeIPInPtr(ptr, ip))
 		} else {
-			line = fmt.Sprintf("[gray]%s [gray]│[-] [purple]%15s[-] [gray]│[-] %-5s [gray]│[-] %s\n",
+			line = fmt.Sprintf("[gray]%s [gray]│[-] [purple]%15s[-] [gray]│[-] %-5s [gray]│[-] [white]%-6d[-] [gray]│[-] %s\n",
 				timeStr,
 				ip,
 				recordTypeColor,
+				response.TTL,
 				colorizeIPInPtr(ptr, ip))
 		}
 
@@ -685,7 +714,7 @@ func visibleLength(s string) int {
 	return len(noColors)
 }
 
-func writeNDJSON(cfg *Config, timestamp time.Time, ip, server, ptr, recordType, target string) {
+func writeNDJSON(cfg *Config, timestamp time.Time, ip, server, ptr, recordType, target string, ttl uint32) {
 	if cfg.outputFile == nil {
 		return
 	}
@@ -697,6 +726,7 @@ func writeNDJSON(cfg *Config, timestamp time.Time, ip, server, ptr, recordType,
 		PTRRecord  string `json:"ptr_record"`
 		RecordType string `json:"record_type"`
 		Target     string `json:"target,omitempty"`
+		TTL        uint32 `json:"ttl"`
 	}{
 		Timestamp:  timestamp.Format(time.RFC3339),
 		IPAddr:     ip,
@@ -704,6 +734,7 @@ func writeNDJSON(cfg *Config, timestamp time.Time, ip, server, ptr, recordType,
 		PTRRecord:  ptr,
 		RecordType: recordType,
 		Target:     target,
+		TTL:        ttl,
 	}
 
 	if data, err := json.Marshal(record); err == nil {