added cool arrow like in tshark, added window size to tcp summary

Author: shadowy-pycoder

layers/ethernet.go

@@ -63,7 +63,7 @@ func (ef *EthernetFrame) String() string {
 }
 
 func (ef *EthernetFrame) Summary() string {
-	return fmt.Sprintf("Ethernet Frame: Src MAC: %s -> Dst MAC: %s", ef.SrcMAC, ef.DstMAC)
+	return fmt.Sprintf("Ethernet Frame: Src MAC: %s →  Dst MAC: %s", ef.SrcMAC, ef.DstMAC)
 }
 
 func (ef *EthernetFrame) MarshalBinary() ([]byte, error) {

layers/ipv4.go

@@ -22,7 +22,8 @@ func newIPv4Flags(flags uint8) *IPv4Flags {
 	return &IPv4Flags{
 		Reserved: (flags >> 2) & 1,
 		DF:       (flags >> 1) & 1,
-		MF:       flags & 1}
+		MF:       flags & 1,
+	}
 }
 
 // Internet Protocol version 4 is described in IETF publication RFC 791.
@@ -86,7 +87,7 @@ func (p *IPv4Packet) String() string {
 }
 
 func (p *IPv4Packet) Summary() string {
-	return fmt.Sprintf("IPv4 Packet: Src IP: %s -> Dst IP: %s", p.SrcIP, p.DstIP)
+	return fmt.Sprintf("IPv4 Packet: Src IP: %s →  Dst IP: %s", p.SrcIP, p.DstIP)
 }
 
 // Parse parses the given byte data into an IPv4 packet struct.

layers/ipv6.go

@@ -21,7 +21,8 @@ func newTrafficiClass(tc uint8) *TrafficClass {
 		Raw:      tc,
 		DSCP:     dscpbin,
 		DSCPDesc: dscpdesc(dscpbin),
-		ECN:      tc & 3}
+		ECN:      tc & 3,
+	}
 }
 
 func (p *TrafficClass) String() string {
@@ -71,7 +72,7 @@ func (p *IPv6Packet) String() string {
 }
 
 func (p *IPv6Packet) Summary() string {
-	return fmt.Sprintf("IPv6 Packet: Src IP: %s -> Dst IP: %s", p.SrcIP, p.DstIP)
+	return fmt.Sprintf("IPv6 Packet: Src IP: %s →  Dst IP: %s", p.SrcIP, p.DstIP)
 }
 
 // Parse parses the given byte data into an IPv6 packet struct.

layers/tcp.go

@@ -99,7 +99,14 @@ func (t *TCPSegment) String() string {
 }
 
 func (t *TCPSegment) Summary() string {
-	return fmt.Sprintf("TCP Segment: Src Port: %d -> Dst Port: %d %s Len: %d", t.SrcPort, t.DstPort, t.Flags, len(t.payload))
+	return fmt.Sprintf(
+		"TCP Segment: Src Port: %d →  Dst Port: %d [%s] Win: %d Len: %d",
+		t.SrcPort,
+		t.DstPort,
+		t.Flags,
+		t.WindowSize,
+		len(t.payload),
+	)
 }
 
 // Parse parses the given byte data into a TCPSegment struct.

layers/udp.go

@@ -34,7 +34,7 @@ func (u *UDPSegment) String() string {
 }
 
 func (u *UDPSegment) Summary() string {
-	return fmt.Sprintf("UDP Segment: Src Port: %d -> Dst Port: %d Len: %d", u.SrcPort, u.DstPort, len(u.payload))
+	return fmt.Sprintf("UDP Segment: Src Port: %d →  Dst Port: %d Len: %d", u.SrcPort, u.DstPort, len(u.payload))
 }
 
 // Parse parses the given byte data into a UDPSegment struct.