网络协议分析-http/https/tcp/udp

# 三次握手:SYN=1 Seq=0 No. Time Source Destination Protocol Length Info 50 7.055660280 127.0.0.1 127.0.0.1 TCP 74 44156 → 12345 [SYN] Seq=0 Win=65495 Len=0 MSS=65495 SACK_PERM TSval=2731439096 TSecr=0 WS=128 Frame 50: 74 bytes on wire (592 bits), 74 bytes captured (592 bits) on interface lo, id 0 Section number: 1 Interface id: 0 (lo) Encapsulation type: Ethernet (1) Arrival Time: Aug 29, 2023 08:26:32.312489778 EDT [Time shift for this packet: 0.000000000 seconds] Epoch Time: 1693311992.312489778 seconds [Time delta from previous captured frame: 0.004110298 seconds] [Time delta from previous displayed frame: 0.000000000 seconds] [Time since reference or first frame: 7.055660280 seconds] Frame Number: 50 Frame Length: 74 bytes (592 bits) Capture Length: 74 bytes (592 bits) [Frame is marked: False] [Frame is ignored: False] [Protocols in frame: eth:ethertype:ip:tcp] [Coloring Rule Name: TCP SYN/FIN] [Coloring Rule String: tcp.flags & 0x02 || tcp.flags.fin == 1] Ethernet II, Src: 00:00:00_00:00:00 (00:00:00:00:00:00), Dst: 00:00:00_00:00:00 (00:00:00:00:00:00) Internet Protocol Version 4, Src: 127.0.0.1, Dst: 127.0.0.1 Transmission Control Protocol, Src Port: 44156, Dst Port: 12345, Seq: 0, Len: 0 # 三次握手:SYN1 ACK=1 Seq=0 No. Time Source Destination Protocol Length Info 51 7.055692471 127.0.0.1 127.0.0.1 TCP 74 12345 → 44156 [SYN, ACK] Seq=0 Ack=1 Win=65483 Len=0 MSS=65495 SACK_PERM TSval=2731439096 TSecr=2731439096 WS=128 Frame 51: 74 bytes on wire (592 bits), 74 bytes captured (592 bits) on interface lo, id 0 Section number: 1 Interface id: 0 (lo) Encapsulation type: Ethernet (1) Arrival Time: Aug 29, 2023 08:26:32.312521969 EDT [Time shift for this packet: 0.000000000 seconds] Epoch Time: 1693311992.312521969 seconds [Time delta from previous captured frame: 0.000032191 seconds] [Time delta from previous displayed frame: 0.000032191 seconds] [Time since reference or first frame: 7.055692471 seconds] Frame Number: 51 Frame Length: 74 bytes (592 bits) Capture Length: 74 bytes (592 bits) [Frame is marked: False] [Frame is ignored: False] [Protocols in frame: eth:ethertype:ip:tcp] [Coloring Rule Name: TCP SYN/FIN] [Coloring Rule String: tcp.flags & 0x02 || tcp.flags.fin == 1] Ethernet II, Src: 00:00:00_00:00:00 (00:00:00:00:00:00), Dst: 00:00:00_00:00:00 (00:00:00:00:00:00) Internet Protocol Version 4, Src: 127.0.0.1, Dst: 127.0.0.1 Transmission Control Protocol, Src Port: 12345, Dst Port: 44156, Seq: 0, Ack: 1, Len: 0 # 三次握手:Ack=1 Seq=1 No. Time Source Destination Protocol Length Info 52 7.055725041 127.0.0.1 127.0.0.1 TCP 66 44156 → 12345 [ACK] Seq=1 Ack=1 Win=65536 Len=0 TSval=2731439096 TSecr=2731439096 Frame 52: 66 bytes on wire (528 bits), 66 bytes captured (528 bits) on interface lo, id 0 Section number: 1 Interface id: 0 (lo) Encapsulation type: Ethernet (1) Arrival Time: Aug 29, 2023 08:26:32.312554539 EDT [Time shift for this packet: 0.000000000 seconds] Epoch Time: 1693311992.312554539 seconds [Time delta from previous captured frame: 0.000032570 seconds] [Time delta from previous displayed frame: 0.000032570 seconds] [Time since reference or first frame: 7.055725041 seconds] Frame Number: 52 Frame Length: 66 bytes (528 bits) Capture Length: 66 bytes (528 bits) [Frame is marked: False] [Frame is ignored: False] [Protocols in frame: eth:ethertype:ip:tcp] [Coloring Rule Name: TCP] [Coloring Rule String: tcp] Ethernet II, Src: 00:00:00_00:00:00 (00:00:00:00:00:00), Dst: 00:00:00_00:00:00 (00:00:00:00:00:00) Internet Protocol Version 4, Src: 127.0.0.1, Dst: 127.0.0.1 Transmission Control Protocol, Src Port: 44156, Dst Port: 12345, Seq: 1, Ack: 1, Len: 0 # 客户端发送消息 Hello, server!. No. Time Source Destination Protocol Length Info 53 7.057834891 127.0.0.1 127.0.0.1 TCP 81 44156 → 12345 [PSH, ACK] Seq=1 Ack=1 Win=65536 Len=15 TSval=2731439098 TSecr=2731439096 Frame 53: 81 bytes on wire (648 bits), 81 bytes captured (648 bits) on interface lo, id 0 Section number: 1 Interface id: 0 (lo) Encapsulation type: Ethernet (1) Arrival Time: Aug 29, 2023 08:26:32.314664389 EDT [Time shift for this packet: 0.000000000 seconds] Epoch Time: 1693311992.314664389 seconds [Time delta from previous captured frame: 0.002109850 seconds] [Time delta from previous displayed frame: 0.002109850 seconds] [Time since reference or first frame: 7.057834891 seconds] Frame Number: 53 Frame Length: 81 bytes (648 bits) Capture Length: 81 bytes (648 bits) [Frame is marked: False] [Frame is ignored: False] [Protocols in frame: eth:ethertype:ip:tcp:data] [Coloring Rule Name: TCP] [Coloring Rule String: tcp] Ethernet II, Src: 00:00:00_00:00:00 (00:00:00:00:00:00), Dst: 00:00:00_00:00:00 (00:00:00:00:00:00) Internet Protocol Version 4, Src: 127.0.0.1, Dst: 127.0.0.1 Transmission Control Protocol, Src Port: 44156, Dst Port: 12345, Seq: 1, Ack: 1, Len: 15 Data (15 bytes) 0000 48 65 6c 6c 6f 2c 20 73 65 72 76 65 72 21 0a Hello, server!. # 服务端应答 No. Time Source Destination Protocol Length Info 54 7.057859991 127.0.0.1 127.0.0.1 TCP 66 12345 → 44156 [ACK] Seq=1 Ack=16 Win=65536 Len=0 TSval=2731439098 TSecr=2731439098 Frame 54: 66 bytes on wire (528 bits), 66 bytes captured (528 bits) on interface lo, id 0 Section number: 1 Interface id: 0 (lo) Encapsulation type: Ethernet (1) Arrival Time: Aug 29, 2023 08:26:32.314689489 EDT [Time shift for this packet: 0.000000000 seconds] Epoch Time: 1693311992.314689489 seconds [Time delta from previous captured frame: 0.000025100 seconds] [Time delta from previous displayed frame: 0.000025100 seconds] [Time since reference or first frame: 7.057859991 seconds] Frame Number: 54 Frame Length: 66 bytes (528 bits) Capture Length: 66 bytes (528 bits) [Frame is marked: False] [Frame is ignored: False] [Protocols in frame: eth:ethertype:ip:tcp] [Coloring Rule Name: TCP] [Coloring Rule String: tcp] Ethernet II, Src: 00:00:00_00:00:00 (00:00:00:00:00:00), Dst: 00:00:00_00:00:00 (00:00:00:00:00:00) Internet Protocol Version 4, Src: 127.0.0.1, Dst: 127.0.0.1 Transmission Control Protocol, Src Port: 12345, Dst Port: 44156, Seq: 1, Ack: 16, Len: 0 # 服务端发送消息 Server received: Hello, server!. No. Time Source Destination Protocol Length Info 55 7.059237157 127.0.0.1 127.0.0.1 TCP 98 12345 → 44156 [PSH, ACK] Seq=1 Ack=16 Win=65536 Len=32 TSval=2731439100 TSecr=2731439098 Frame 55: 98 bytes on wire (784 bits), 98 bytes captured (784 bits) on interface lo, id 0 Section number: 1 Interface id: 0 (lo) Encapsulation type: Ethernet (1) Arrival Time: Aug 29, 2023 08:26:32.316066655 EDT [Time shift for this packet: 0.000000000 seconds] Epoch Time: 1693311992.316066655 seconds [Time delta from previous captured frame: 0.001377166 seconds] [Time delta from previous displayed frame: 0.001377166 seconds] [Time since reference or first frame: 7.059237157 seconds] Frame Number: 55 Frame Length: 98 bytes (784 bits) Capture Length: 98 bytes (784 bits) [Frame is marked: False] [Frame is ignored: False] [Protocols in frame: eth:ethertype:ip:tcp:data] [Coloring Rule Name: TCP] [Coloring Rule String: tcp] Ethernet II, Src: 00:00:00_0