go-gopacket-example

command module
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Published: Dec 20, 2024 License: MIT Imports: 3 Imported by: 0

README

go-gopacket-example

Packet Capture with gopacket example by golang.

Go Version

The sources in this repository only work on Linux.

Environments

$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 22.04.2 LTS
Release:        22.04
Codename:       jammy


$ go version
go version go1.20.3 linux/amd64

Requirements

libpcap
$ sudo apt install libpcap-dev
nc (netcat) (optional)
$ sudo apt install netcat
tcpdump (optional)
$ sudo apt install tcpdump
arp-scan (optional)
$ sudo apt install arp-scan
nslookup or dig (optional)
$ sudo apt install dnsutils
go-task
$ go install github.com/go-task/task/v3/cmd/task@latest

How to run

$ task --list
task: Available tasks for this project:
* applayer-dhcp:            See DHCP info
* applayer-dns:             See DNS info
* applayer-dnssec:          See DNSSEC info
* applayer-http:            See HTTP info
* bpffilter:                Run pcap.OpenOffline() with BPF Filter
* default:                  default (print all ifs)
* fmtvet:                   go fmt and go vet
* layertype-app:            See gopacket.Packet.ApplicationLayer() info
* layertype-arp:            See *layers.ARP info
* layertype-ethernet:       See *layers.Ethernet info
* layertype-icmpv4:         See *layers.ICMPv4 info
* layertype-ipv4:           See *layers.IPv4 info
* layertype-tcp:            See *layers.TCP info
* layertype-udp:            See *layers.UDP info
* openlive:                 Run pcap.OpenLive() example
* openoffline:              Run pcap.OpenOffline() example
* packet:                   See *pcap.Packet structure info


$ task openlive
task: [openlive] go build
task: [openlive] sudo ./openlive


[Packet capture will be displayed.]


$ task openoffline
task: [openoffline] sudo timeout 3s tcpdump -i eth0 -w example.pcap 'tcp'
tcpdump: listening on eth0, link-type EN10MB (Ethernet), capture size 262144 bytes
61 packets captured
77 packets received by filter
0 packets dropped by kernel
task: [openoffline] go build
task: [openoffline] sudo ./openoffline

[Packet capture will be displayed.]



$ task bpffilter
task: [bpffilter] go build
task: [bpffilter] sudo bash ./tcpdump.sh
task: [bpffilter] bash ./ping.sh
PING localhost(localhost (::1)) 56 data bytes
64 bytes from localhost (::1): icmp_seq=1 ttl=64 time=0.018 ms
tcpdump: listening on lo, link-type EN10MB (Ethernet), snapshot length 262144 bytes
64 bytes from localhost (::1): icmp_seq=2 ttl=64 time=0.031 ms
64 bytes from localhost (::1): icmp_seq=3 ttl=64 time=0.046 ms
task: [bpffilter] sudo bash ./kill.sh
33 packets captured
82 packets received by filter
0 packets dropped by kernel
task: [bpffilter] sleep 1
task: [bpffilter] sudo ./bpffilter
START

[Packet capture will be displayed.]

DONE



$ task packet
task: [packet] go build
task: [packet] sudo bash ./app.sh
task: [packet] sleep 1
task: [packet] sudo bash ./server.sh
task: [packet] sudo bash ./client.sh
helloworldtask: [packet] sleep 3
------------------------------
[Capture Length] 74
[Src           ] 127.0.0.1
[Dst           ] 127.0.0.1
[Protocol      ] TCP
[SRC PORT      ] 45400
[DST PORT      ] 22222(easyengine)
[TCP FLAGS     ]
>>> SYN=true
>>> ACK=false
>>> PSH=false
>>> RST=false
>>> FIN=false
------------------------------
------------------------------
[Capture Length] 74
[Src           ] 127.0.0.1
[Dst           ] 127.0.0.1
[Protocol      ] TCP
[SRC PORT      ] 22222(easyengine)
[DST PORT      ] 45400
[TCP FLAGS     ]
>>> SYN=true
>>> ACK=true
>>> PSH=false
>>> RST=false
>>> FIN=false
------------------------------
------------------------------
[Capture Length] 66
[Src           ] 127.0.0.1
[Dst           ] 127.0.0.1
[Protocol      ] TCP
[SRC PORT      ] 45400
[DST PORT      ] 22222(easyengine)
[TCP FLAGS     ]
>>> SYN=false
>>> ACK=true
>>> PSH=false
>>> RST=false
>>> FIN=false
------------------------------
------------------------------
[Capture Length] 76
[Src           ] 127.0.0.1
[Dst           ] 127.0.0.1
[Protocol      ] TCP
[SRC PORT      ] 45400
[DST PORT      ] 22222(easyengine)
[TCP FLAGS     ]
>>> SYN=false
>>> ACK=true
>>> PSH=true
>>> RST=false
>>> FIN=false
[Payload       ] [104 101 108 108 111 119 111 114 108 100]
------------------------------
------------------------------
[Capture Length] 66
[Src           ] 127.0.0.1
[Dst           ] 127.0.0.1
[Protocol      ] TCP
[SRC PORT      ] 22222(easyengine)
[DST PORT      ] 45400
[TCP FLAGS     ]
>>> SYN=false
>>> ACK=true
>>> PSH=false
>>> RST=false
>>> FIN=false
------------------------------
------------------------------
[Capture Length] 66
[Src           ] 127.0.0.1
[Dst           ] 127.0.0.1
[Protocol      ] TCP
[SRC PORT      ] 45400
[DST PORT      ] 22222(easyengine)
[TCP FLAGS     ]
>>> SYN=false
>>> ACK=true
>>> PSH=false
>>> RST=false
>>> FIN=true
------------------------------
------------------------------
[Capture Length] 66
[Src           ] 127.0.0.1
[Dst           ] 127.0.0.1
[Protocol      ] TCP
[SRC PORT      ] 22222(easyengine)
[DST PORT      ] 45400
[TCP FLAGS     ]
>>> SYN=false
>>> ACK=true
>>> PSH=false
>>> RST=false
>>> FIN=true
------------------------------
------------------------------
[Capture Length] 66
[Src           ] 127.0.0.1
[Dst           ] 127.0.0.1
[Protocol      ] TCP
[SRC PORT      ] 45400
[DST PORT      ] 22222(easyengine)
[TCP FLAGS     ]
>>> SYN=false
>>> ACK=true
>>> PSH=false
>>> RST=false
>>> FIN=false
------------------------------
task: [packet] sudo bash ./kill.sh



$ task layertype-ethernet
task: [layertype-ethernet] go build
task: [layertype-ethernet] sudo ./ethernet
START
[Src MAC      ] 16:xx:42:44:xx:cd
[Dst MAC      ] 7e:bf:24:xx:3e:90
[Ethernet type] IPv4
[Src MAC      ] 7e:bf:24:xx:3e:90
[Dst MAC      ] 16:xx:42:44:2e:cd
[Ethernet type] IPv4
[Src MAC      ] 16:xx:42:44:2e:cd
[Dst MAC      ] 7e:bf:24:xx:3e:90
[Ethernet type] IPv4
[Src MAC      ] 7e:bf:24:xx:3e:90
[Dst MAC      ] 16:xx:42:44:2e:cd
[Ethernet type] IPv4
[Src MAC      ] 7e:bf:24:xx:3e:90
[Dst MAC      ] 16:xx:42:44:2e:cd
[Ethernet type] IPv4
[Src MAC      ] 7e:bf:24:xx:3e:90
[Dst MAC      ] 16:xx:42:44:2e:cd
[Ethernet type] IPv4
DONE


$ task layertype-arp
task: [layertype-arp] go build
task: [layertype-arp] sudo bash ./arp-scan.sh &
task: [layertype-arp] sudo ./arp
START
Interface: eth0, type: EN10MB, MAC: c2:88:65:43:bc:ed, IPv4: 10.0.5.2
Starting arp-scan 1.9.7 with 4 hosts (https://github.com/royhills/arp-scan)
10.0.5.1        42:6f:a6:72:06:80       (Unknown: locally administered)
[Operation    ] 1
[Src Hw Addr  ] [194 136 101 76 188 237]
[Src Prot Addr] [10 0 2 6]
[Dst Hw Addr  ] [0 0 0 0 0 0]
[Dst Prot Addr] [10 3 5 0]

1 packets received by filter, 0 packets dropped by kernel
Ending arp-scan 1.9.7: 4 hosts scanned in 1.443 seconds (2.77 hosts/sec). 1 responded
DONE


$ task layertype-ipv4
task: [layertype-ipv4] go build
task: [layertype-ipv4] sudo ./ipv4
START
[Version       ] 4
[IHL           ] 5 words -> 160 bits -> 20 bytes
[Length        ] 81
[Payload Length] 61
[TTL           ] 64
[Protocol      ] TCP
[Src IP        ] 10.0.5.2
[Dst IP        ] 192.168.39.75
DONE 


$ task layertype-icmpv4
task: [layertype-icmpv4] go build
task: [layertype-icmpv4] sudo bash ./ping.sh &
task: [layertype-icmpv4] sudo ./icmpv4
START
PING  (127.0.0.1) 56(84) bytes of data.
64 bytes from localhost (127.0.0.1): icmp_seq=1 ttl=64 time=0.018 ms
[Seq     ] 1
[Type    ] 8
[Code    ] 0
[Req/Rep ] ICMP Echo Request
[Checksum] 20183
[Seq     ] 1
[Type    ] 0
[Code    ] 0
[Req/Rep ] ICMP Echo Reply
[Checksum] 22231
64 bytes from localhost (127.0.0.1): icmp_seq=2 ttl=64 time=0.028 ms

---  ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 1020ms
rtt min/avg/max/mdev = 0.018/0.023/0.028/0.005 ms
DONE


$ task layertype-tcp
task: [layertype-tcp] go build
task: [layertype-tcp] sudo ./tcp
START
[Src Port       ] 51190
[Dst Port       ] 443(https)
[Seq Number     ] 771501779
[Ack Number     ] 1030112796
[Window Size    ] 331
[TCP Flags - SYN] false
[TCP Flags - ACK] true
[TCP Flags - PSH] true
[TCP Flags - RST] false
[TCP Flags - FIN] false
[Checksum       ] 4529
[Urgent Pointer ] 0
----------------
[Src Port       ] 51190
[Dst Port       ] 443(https)
[Seq Number     ] 771501819
[Ack Number     ] 1030112796
[Window Size    ] 331
[TCP Flags - SYN] false
[TCP Flags - ACK] true
[TCP Flags - PSH] true
[TCP Flags - RST] false
[TCP Flags - FIN] false
[Checksum       ] 4686
[Urgent Pointer ] 0
----------------
[Src Port       ] 443(https)
[Dst Port       ] 51190
[Seq Number     ] 1030112796
[Ack Number     ] 771501819
[Window Size    ] 1962
[TCP Flags - SYN] false
[TCP Flags - ACK] true
[TCP Flags - PSH] false
[TCP Flags - RST] false
[TCP Flags - FIN] false
[Checksum       ] 10449
[Urgent Pointer ] 0
----------------
DONE


$ task layertype-udp
task: [layertype-udp] go build
task: [layertype-udp] sudo bash ./app.sh
task: [layertype-udp] sleep 1
START
task: [layertype-udp] sudo bash ./server.sh
task: [layertype-udp] sudo bash ./client.sh
task: [layertype-udp] sleep 3
[Src Port       ] 38037
[Dst Port       ] 22222
[Length         ] 19
[Payload        ] [104 101 108 108 111 119 111 114 108 100 10]
[Payload(decode)] helloworld
[Checksum       ] 65062
----------------
task: [layertype-udp] sudo bash ./kill.sh



$ task layertype-app
task: [layertype-app] go build
task: [layertype-app] sudo bash ./tcpdump.sh
task: [layertype-app] sudo bash ./server.sh
task: [layertype-app] sleep 1
task: [layertype-app] sudo bash ./client.sh
task: [layertype-app] sleep 3
task: [layertype-app] sudo bash ./kill.sh
task: [layertype-app] sleep 1
task: [layertype-app] sudo ./app
START
[ApplicatonLayer][Payload ] 10 bytes
[ApplicatonLayer][Contents] helloworld
[TCP Layer      ][Payload ] 10 bytes
[TCP Layer      ][Contents] helloworld
----------------
[ApplicatonLayer][Payload ] 6 bytes
[ApplicatonLayer][Contents] golang
[TCP Layer      ][Payload ] 6 bytes
[TCP Layer      ][Contents] golang
----------------
[ApplicatonLayer][Payload ] 9 bytes
[ApplicatonLayer][Contents] goroutine
[TCP Layer      ][Payload ] 9 bytes
[TCP Layer      ][Contents] goroutine
----------------
DONE


$ task applayer-http
task: [applayer-http] go build -o webserver server/main.go
task: [applayer-http] go build -o http main.go
task: [applayer-http] ./webserver &
task: [applayer-http] sudo ./http &
task: [applayer-http] sleep 1
START
task: [applayer-http] curl --silent http://localhost:12345/ > /dev/null
task: [applayer-http] sleep 3
[Src Port       ] 38220
[Dst Port       ] 12345(italk)
[Seq Number     ] 3929104362
[Ack Number     ] 0
[Window Size    ] 43690
[TCP Flags - SYN] true
[TCP Flags - ACK] false
[TCP Flags - PSH] false
[TCP Flags - RST] false
[TCP Flags - FIN] false
[Checksum       ] 65072
[Urgent Pointer ] 0
------------------------------------
[Src Port       ] 12345(italk)
[Dst Port       ] 38220
[Seq Number     ] 3265036388
[Ack Number     ] 3929104363
[Window Size    ] 43690
[TCP Flags - SYN] true
[TCP Flags - ACK] true
[TCP Flags - PSH] false
[TCP Flags - RST] false
[TCP Flags - FIN] false
[Checksum       ] 65072
[Urgent Pointer ] 0
------------------------------------
[Src Port       ] 38220
[Dst Port       ] 12345(italk)
[Seq Number     ] 3929104363
[Ack Number     ] 3265036389
[Window Size    ] 342
[TCP Flags - SYN] false
[TCP Flags - ACK] true
[TCP Flags - PSH] false
[TCP Flags - RST] false
[TCP Flags - FIN] false
[Checksum       ] 65064
[Urgent Pointer ] 0
------------------------------------
HTTP Method: GET
HTTP URL: /
HTTP Protocol: HTTP/1.1
HTTP Headers:
  User-Agent: curl/7.81.0
  Accept: */*
------------------------------------
[Src Port       ] 12345(italk)
[Dst Port       ] 38220
[Seq Number     ] 3265036389
[Ack Number     ] 3929104442
[Window Size    ] 341
[TCP Flags - SYN] false
[TCP Flags - ACK] true
[TCP Flags - PSH] false
[TCP Flags - RST] false
[TCP Flags - FIN] false
[Checksum       ] 65064
[Urgent Pointer ] 0
------------------------------------
HTTP Status Code: 200
HTTP Protocol: HTTP/1.1
HTTP Headers:
  Date: Sun, 28 May 2023 16:33:50 GMT
  Content-Length: 11
  Content-Type: text/plain; charset=utf-8
BODY: helloworld

------------------------------------
[Src Port       ] 38220
[Dst Port       ] 12345(italk)
[Seq Number     ] 3929104442
[Ack Number     ] 3265036517
[Window Size    ] 341
[TCP Flags - SYN] false
[TCP Flags - ACK] true
[TCP Flags - PSH] false
[TCP Flags - RST] false
[TCP Flags - FIN] false
[Checksum       ] 65064
[Urgent Pointer ] 0
------------------------------------
[Src Port       ] 38220
[Dst Port       ] 12345(italk)
[Seq Number     ] 3929104442
[Ack Number     ] 3265036517
[Window Size    ] 342
[TCP Flags - SYN] false
[TCP Flags - ACK] true
[TCP Flags - PSH] false
[TCP Flags - RST] false
[TCP Flags - FIN] true
[Checksum       ] 65064
[Urgent Pointer ] 0
------------------------------------
[Src Port       ] 12345(italk)
[Dst Port       ] 38220
[Seq Number     ] 3265036517
[Ack Number     ] 3929104443
[Window Size    ] 342
[TCP Flags - SYN] false
[TCP Flags - ACK] true
[TCP Flags - PSH] false
[TCP Flags - RST] false
[TCP Flags - FIN] true
[Checksum       ] 65064
[Urgent Pointer ] 0
------------------------------------
[Src Port       ] 38220
[Dst Port       ] 12345(italk)
[Seq Number     ] 3929104443
[Ack Number     ] 3265036518
[Window Size    ] 342
[TCP Flags - SYN] false
[TCP Flags - ACK] true
[TCP Flags - PSH] false
[TCP Flags - RST] false
[TCP Flags - FIN] false
[Checksum       ] 65064
[Urgent Pointer ] 0
------------------------------------
task: [applayer-http] pkill webserver
task: [applayer-http] sudo pkill http



$ task applayer-dns
task: [applayer-dns] go build -o dns main.go
task: [applayer-dns] sudo ./dns &
START
task: [applayer-dns] dig +noall google.com
[Src Port       ] 45271
[Dst Port       ] 53(domain)
[Length         ] 59
[Checksum       ] 4432
[DNS Questions]
        ;google.com.    IN       A
------------------------------------
[Src Port       ] 53(domain)
[Dst Port       ] 45271
[Length         ] 63
[Checksum       ] 27399
[DNS Questions]
        ;google.com.    IN       A
[DNS Answers]
        google.com.     166     IN      A       142.250.69.206
------------------------------------
task: [applayer-dns] sudo pkill dns



$ task applayer-dnssec
task: [applayer-dnssec] go build -o dnssec main.go
task: [applayer-dnssec] sudo ./dnssec &
START
task: [applayer-dnssec] dig +noall +dnssec iij.ad.jp
[Src Port       ] 51846
[Dst Port       ] 53(domain)
[Length         ] 58
[Checksum       ] 4431
[DNS Questions]
        ;iij.ad.jp.     IN       A
------------------------------------
[Src Port       ] 53(domain)
[Dst Port       ] 51846
[Length         ] 231
[Checksum       ] 21922
[DNS Questions]
        ;iij.ad.jp.     IN       A
[DNS Answers]
        [A     ] iij.ad.jp.     300     IN      A       202.232.2.191
        [RRSIG ] iij.ad.jp.     300     IN      RRSIG   A 8 3 300 20230705151005 20230605151005 13308 iij.ad.jp. xxxxxxxxxxxxx
------------------------------------
task: [applayer-dnssec] dig +noall iij.ad.jp dnskey
[Src Port       ] 53908
[Dst Port       ] 53(domain)
[Length         ] 58
[Checksum       ] 4431
[DNS Questions]
        ;iij.ad.jp.     IN       DNSKEY
------------------------------------
[Src Port       ] 53(domain)
[Dst Port       ] 53908
[Length         ] 618
[Checksum       ] 53795
[DNS Questions]
        ;iij.ad.jp.     IN       DNSKEY
[DNS Answers]
        [DNSKEY] iij.ad.jp.     2763    IN      DNSKEY  256 3 8 xxxxxxxxxxxxx
        [DNSKEY] iij.ad.jp.     2763    IN      DNSKEY  256 3 8 xxxxxxxxxxxxx
        [DNSKEY] iij.ad.jp.     2763    IN      DNSKEY  257 3 8 xxxxxxxxxxxxx
------------------------------------
task: [applayer-dnssec] sudo pkill dnssec


$ sudo vsftpd /etc/vsftpd.conf &
$ task applayer-ftp
Please start the FTP server in advance.
task: [applayer-ftp] go build -o gopacket-ftp main.go
task: [applayer-ftp] sudo ./gopacket-ftp &
START

# ----------------------------------------------------
# Run ftp-command in another terminal.
#
# $ lftp -u anonymous, anonymous@localhost
# lftp anonymous@localhost:~> ls
# lftp anonymous@localhost:/> bye
# ----------------------------------------------------

[Src Port       ] 52584
[Dst Port       ] 21(ftp)
[Seq Number     ] 3285394225
[Ack Number     ] 0
[Window Size    ] 43690
[TCP Flags - SYN] true
[TCP Flags - ACK] false
[TCP Flags - PSH] false
[TCP Flags - RST] false
[TCP Flags - FIN] false
[Checksum       ] 65072
[Urgent Pointer ] 0
------------------------------------
[Src Port       ] 21(ftp)
[Dst Port       ] 52584
[Seq Number     ] 2228490639
[Ack Number     ] 3285394226
[Window Size    ] 43690
[TCP Flags - SYN] true
[TCP Flags - ACK] true
[TCP Flags - PSH] false
[TCP Flags - RST] false
[TCP Flags - FIN] false
[Checksum       ] 65072
[Urgent Pointer ] 0
------------------------------------
[Src Port       ] 52584
[Dst Port       ] 21(ftp)
[Seq Number     ] 3285394226
[Ack Number     ] 2228490640
[Window Size    ] 342
[TCP Flags - SYN] false
[TCP Flags - ACK] true
[TCP Flags - PSH] false
[TCP Flags - RST] false
[TCP Flags - FIN] false
[Checksum       ] 65064
[Urgent Pointer ] 0
------------------------------------
[FTP] 220 (vsFTPd 3.0.5)

------------------------------------
[Src Port       ] 52584
[Dst Port       ] 21(ftp)
[Seq Number     ] 3285394226
[Ack Number     ] 2228490660
[Window Size    ] 342
[TCP Flags - SYN] false
[TCP Flags - ACK] true
[TCP Flags - PSH] false
[TCP Flags - RST] false
[TCP Flags - FIN] false
[Checksum       ] 65064
[Urgent Pointer ] 0
------------------------------------
[FTP] FEAT

------------------------------------
[Src Port       ] 21(ftp)
[Dst Port       ] 52584
[Seq Number     ] 2228490660
[Ack Number     ] 3285394232
[Window Size    ] 342
[TCP Flags - SYN] false
[TCP Flags - ACK] true
[TCP Flags - PSH] false
[TCP Flags - RST] false
[TCP Flags - FIN] false
[Checksum       ] 65064
[Urgent Pointer ] 0
------------------------------------
[FTP] 211-Features:

------------------------------------
[FTP]  EPRT

------------------------------------
[FTP]  EPSV

------------------------------------
[Src Port       ] 52584
[Dst Port       ] 21(ftp)
[Seq Number     ] 3285394232
[Ack Number     ] 2228490682
[Window Size    ] 342
[TCP Flags - SYN] false
[TCP Flags - ACK] true
[TCP Flags - PSH] false
[TCP Flags - RST] false
[TCP Flags - FIN] false
[Checksum       ] 65064
[Urgent Pointer ] 0
------------------------------------
[FTP]  MDTM

------------------------------------
[FTP]  PASV

------------------------------------
[FTP]  REST STREAM

------------------------------------
[FTP]  SIZE

------------------------------------
[Src Port       ] 52584
[Dst Port       ] 21(ftp)
[Seq Number     ] 3285394232
[Ack Number     ] 2228490717
[Window Size    ] 342
[TCP Flags - SYN] false
[TCP Flags - ACK] true
[TCP Flags - PSH] false
[TCP Flags - RST] false
[TCP Flags - FIN] false
[Checksum       ] 65064
[Urgent Pointer ] 0
------------------------------------
[FTP]  TVFS

------------------------------------
[FTP] 211 End

------------------------------------
[Src Port       ] 52584
[Dst Port       ] 21(ftp)
[Seq Number     ] 3285394232
[Ack Number     ] 2228490731
[Window Size    ] 342
[TCP Flags - SYN] false
[TCP Flags - ACK] true
[TCP Flags - PSH] false
[TCP Flags - RST] false
[TCP Flags - FIN] false
[Checksum       ] 65064
[Urgent Pointer ] 0
------------------------------------
[FTP] AUTH TLS

------------------------------------
[FTP] 530 Please login with USER and PASS.

------------------------------------
[FTP] USER anonymous

------------------------------------
[FTP] 331 Please specify the password.

------------------------------------
[FTP] PASS 

------------------------------------
[FTP] 230 Login successful.

------------------------------------
[FTP] PWD

------------------------------------
[FTP] 257 "/" is the current directory

------------------------------------
[FTP] PASV

------------------------------------
[FTP] 227 Entering Passive Mode (127,0,0,1,209,75).

------------------------------------
[FTP] LIST

------------------------------------
[FTP] 150 Here comes the directory listing.

------------------------------------
[FTP] 226 Directory send OK.

------------------------------------
[Src Port       ] 52584
[Dst Port       ] 21(ftp)
[Seq Number     ] 3285394282
[Ack Number     ] 2228490979
[Window Size    ] 342
[TCP Flags - SYN] false
[TCP Flags - ACK] true
[TCP Flags - PSH] false
[TCP Flags - RST] false
[TCP Flags - FIN] false
[Checksum       ] 65064
[Urgent Pointer ] 0
------------------------------------
[FTP] QUIT

------------------------------------
[FTP] 221 Goodbye.

------------------------------------
[Src Port       ] 21(ftp)
[Dst Port       ] 52584
[Seq Number     ] 2228490993
[Ack Number     ] 3285394288
[Window Size    ] 342
[TCP Flags - SYN] false
[TCP Flags - ACK] true
[TCP Flags - PSH] false
[TCP Flags - RST] false
[TCP Flags - FIN] true
[Checksum       ] 65064
[Urgent Pointer ] 0
------------------------------------
[Src Port       ] 52584
[Dst Port       ] 21(ftp)
[Seq Number     ] 3285394288
[Ack Number     ] 2228490994
[Window Size    ] 342
[TCP Flags - SYN] false
[TCP Flags - ACK] true
[TCP Flags - PSH] false
[TCP Flags - RST] false
[TCP Flags - FIN] true
[Checksum       ] 65064
[Urgent Pointer ] 0
------------------------------------
[Src Port       ] 21(ftp)
[Dst Port       ] 52584
[Seq Number     ] 2228490994
[Ack Number     ] 3285394289
[Window Size    ] 342
[TCP Flags - SYN] false
[TCP Flags - ACK] true
[TCP Flags - PSH] false
[TCP Flags - RST] false
[TCP Flags - FIN] false
[Checksum       ] 65064
[Urgent Pointer ] 0
------------------------------------

task: [applayer-ftp] sudo pkill gopacket-ftp

REFERENCES

Documentation

Overview

Package main is the example of pcap.FindAllDevs()

Directories

Path Synopsis
cmd

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