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https://github.com/ddddddO/packemon

Packet monster (っ‘-’)╮=͟͟͞͞◒ ヽ( '-'ヽ) TUI tool for sending packets of arbitrary input and monitoring packets on any network interfaces (default: eth0).
https://github.com/ddddddO/packemon

ebpf linux network network-programming networking observability packet packet-analyzer packet-generator packet-monitoring pcap penetration-testing pentesting protocol routing-protocols security socket-programming sockets system-programming

Last synced: about 2 months ago
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Packet monster (っ‘-’)╮=͟͟͞͞◒ ヽ( '-'ヽ) TUI tool for sending packets of arbitrary input and monitoring packets on any network interfaces (default: eth0).

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README 

        
# Packémon



Packet monster, or `Packémon` for short! (っ‘-’)╮=͟͟͞͞◒ ヽ( '-'ヽ) 



https://github.com/user-attachments/assets/69dc501d-8ffd-484a-90e2-dffa0fab373e



TUI tool for generating packets of arbitrary input and monitoring packets on any network interfaces (default: `eth0`). **This tool is not available for Windows and macOS. I have confirmed that it works on Linux (Debian and Ubuntu on WSL2) .**



I intend to develop it patiently🌴



The images of Packemon on REDME should be used as reference only, as they may look different from the actual Packemon.



> [!WARNING]

> This tool is implemented with protocol stacks from scratch and utilizes raw socket.

> There may be many bugs. If you find a bug, I would be glad if you raise an issue or give me a pull request!



## Feature



This TUI tool has two major functions: packet generation and packet monitoring.



|Generated DNS query 
and Recieved response| Displayed DNS response detail|Filtered packets|

|--|--|--|

|![](./assets/packemon_dns.png)|![](./assets/packemon_dns_response.png)|![](./assets/packemon_filter.png)|



This image shows packemon running in Generator / Monitor mode.

DNS query packet generated by Generator on the left is shown in **56** line of the Monitor. DNS query response packet is shown as **57** line, and a more detailed view of it is shown in the middle image.

See **[here](https://github.com/ddddddO/packemon#sending-dns-query-and-monitoring-dns-response)** for detailed instructions.



Packemon's Monitor allows user to select each packet by pressing `Enter` key. Then, select any line and press `Enter` key to see the details of the desired packet. Pressing `Esc` key in the packet detail screen will return you to the original packet list screen.

The rightmost image shows how the packet list is filtered.



### Generator



- Send generated packets to any network interfaces.

  - You can specify network interface with `--interface` flag. Default is `eth0`.



- Packets of various protocols are supported.



  details



  - [x] Ethernet

  - [x] ARP (WIP)

  - [x] IPv4 (WIP)

  - [x] IPv6 (WIP)

  - [x] ICMPv4 (WIP)

  - [ ] ICMPv6

  - [x] TCP (WIP)

  - [x] UDP (WIP)

  - [x] TLSv1.2 (WIP)

    - This tool is not very useful because the number of cipher suites it supports is still small, but an environment where you can try it out can be found [here](./cmd/debugging/https-server/README.md).

      - TCP 3way handshake ~ TLS handshake ~ TLS Application data (encrypted HTTP)

    - Supported cipher suites include

      - `TLS_RSA_WITH_AES_128_GCM_SHA256`

    - You can check the server for available cipher suites with the following command

      - `nmap --script ssl-enum-ciphers -p 443 `

  - [x] TLSv1.3 (WIP)

    - This tool is not very useful because the number of cipher suites it supports is still small, but an environment where you can try it out can be found [here](./cmd/debugging/https-server/README.md).

      - TCP 3way handshake ~ TLS handshake ~ TLS Application data (encrypted HTTP)

    - Supported cipher suites include

      - `TLS_CHACHA20_POLY1305_SHA256`

  - [x] DNS (WIP)

  - [x] HTTP (WIP)

  - [ ] xxxxx....

  - [ ] Routing Protocols

    - IGP (Interior Gateway Protocol)

      - [ ] OSPF (Open Shortest Path First)

      - [ ] EIGRP (Enhanced Interior Gateway Routing Protocol)

      - [ ] RIP (Routing Information Protocol)

    - EGP (Exterior Gateway Protocol)

      - [ ] BGP (Border Gateway Protocol)

        - [Currently there is only debug mode](./cmd/debugging/bgp/README.md)

          - TCP 3way handshake ~ Open ~ Keepalive ~ Update ~ Notification



  



>[!WARNING]

> While using Generator mode, TCP RST packets automatically sent out by the kernel are dropped. When this mode is stopped, the original state is restored. Probably😅.

> Incidentally, dropping RST packets is done by running [the eBPF program](./egress_control/).

> The background note incorporating the eBPF is the POST of X around [here](https://x.com/ddddddOpppppp/status/1798715056513056881). 



### Monitor



- Monitor any network interfaces.

  - You can specify network interface with `--interface` flag. Default is `eth0`.



- Can filter packets to be displayed.

  - You can filter the values for each item (e.g. `Dst`, `Proto`, `SrcIP`...etc.) displayed in the listed packets.



- Specified packets can be saved to pcapng file.



- Packets of various protocols are supported.



  details



  - [x] Ethernet

  - [x] ARP

  - [x] IPv4 (WIP)

  - [x] IPv6 (WIP)

  - [x] ICMPv4 (WIP)

  - [ ] ICMPv6

  - [x] TCP (WIP)

  - [x] UDP

  - [x] TLSv1.2 (WIP)

  - [ ] TLSv1.3

  - [ ] DNS (WIP)

    - [x] DNS query

    - [x] DNS query response

    - [ ] xxxxx....

  - [ ] HTTP (WIP)

    - [x] HTTP GET request

    - [x] HTTP GET response

    - [ ] xxxxx....

  - [ ] xxxxx....

  - [ ] Routing Protocols

    - IGP (Interior Gateway Protocol)

      - [ ] OSPF (Open Shortest Path First)

      - [ ] EIGRP (Enhanced Interior Gateway Routing Protocol)

      - [ ] RIP (Routing Information Protocol)

    - EGP (Exterior Gateway Protocol)

      - [ ] BGP (Border Gateway Protocol)



  



>[!WARNING]

> If packet parsing fails, it is indicated by “Proto:ETHER” as shown in the following image. 

>

> ![](./assets/failed_parse_packet.png)

>

> If you want to check the details of the packet, you can select the line, save it to a pcapng file, and import it into Wireshark or other software🙏



## Installation






git clone & Go

# Recomended (Clone this repository and require 'Dependencies' section of https://ebpf-go.dev/guides/getting-started/#ebpf-c-program)

$ cd egress_control/ && go generate && cd -

$ go build -o packemon cmd/packemon/*.go

$ ls | grep packemon

$ mv packemon /usr/local/bin/



Go

# Deprecated (In some environments, RST packets may be sent during TCP 3-way handshake)

$ go install github.com/ddddddO/packemon/cmd/packemon@latest



deb

$ export PACKEMON_VERSION=X.X.X

$ curl -o packemon.deb -L https://github.com/ddddddO/packemon/releases/download/v$PACKEMON_VERSION/packemon_$PACKEMON_VERSION-1_amd64.deb

$ dpkg -i packemon.deb



rpm

$ export PACKEMON_VERSION=X.X.X

$ yum install https://github.com/ddddddO/packemon/releases/download/v$PACKEMON_VERSION/packemon_$PACKEMON_VERSION-1_amd64.rpm



apk

$ export PACKEMON_VERSION=X.X.X

$ curl -o packemon.apk -L https://github.com/ddddddO/packemon/releases/download/v$PACKEMON_VERSION/packemon_$PACKEMON_VERSION-1_amd64.apk

$ apk add --allow-untrusted packemon.apk






## Usage



- Generator

  ```console

  sudo packemon --send

  ```



- Monitor

  ```console

  sudo packemon

  ```



## Usecase

### Sending DNS query and Monitoring DNS response



1. setup

    ```sh

    # Generator

    $ sudo packemon --send

    ```



    ```sh

    # Monitor

    $ sudo packemon

    ```



    ← Generator | Monitor →



    ![](./assets/packemon_dns.png)



2. Generator

    - `Lα` > `Ethernet` > `Ether Type` > **IPv4**

    - `Lβ` > `IPv4` > `Protocol` > **UDP**

    - `Lβ` > `IPv4` > `Destination IP Addr` > **1.1.1.1**

      - Enter the address of DNS resolver here. Above is the address of Cloudflare resolver.

    - `Lγ` > `UDP` > `Destination Port` > **53**

    - `Lγ` > `UDP` > `Automatically calculate length ?` > **(Check!)**

    - `Lε` > `DNS` > `Queries Domain` > **go.dev**

      - Enter here the domain for which you want to name resolution.



    - `Lε` > `DNS` > Click on **Send!**

      - At this time, DNS query is sent with the contents set so far.



    ![](./assets/packemon_dns_response_2.png)



3. Monitor



    - Find records where `Proto`: **DNS** and `DstIP` or `SrcIP` is **1.1.1.1**. Select each record to see the packet structure of the DNS query and the packet structure of the DNS response.



      - List

        ![](./assets/sending_dns_query_and_monitoring_dns_response/3.png)



      - DNS query (`DstIP: 1.1.1.1`)

        ![](./assets/sending_dns_query_and_monitoring_dns_response/4.png)



      - DNS response (`SrcIP: 1.1.1.1`)

        ![](./assets/sending_dns_query_and_monitoring_dns_response/5.png)



## Another feature



⚠️ Might be repealed



The local node's browser can monitor packets from remote nodes or send arbitrary packets from remote nodes.



```

                                         +-------------------------------------+

+----------------------+                 | REMOTE NODE                         |

| LOCAL NODE (Browser) |                 | $ sudo packemon-api --interface xxx |

|  Monitor   <---------|-- WebSocket   --|--> HTTP GET  /ws  <-----+           |

|  Generator  ---------|-- POST packet --|--> HTTP POST /packet    |           |

+----------------------+                 |      -> parse packet    |           |                  +---------------+

                                         |           -> Network Interface -----|-- Send packet -->| TARGET NODE x |

                                         +-------------------------------------+                  |               |

                                                                                                  +---------------+

```



- Remote node

  ![](./assets/packemon_api_remote.png)



- Local node

  ![](./assets/packemon_api_local.png)



>[!WARNING]

> Please note that the following is dangerous.



The following procedure is an example of how you can expose packemon-api to the outside world and monitor and send remote node packets on your browser.



1. (REMOTE) Please install `packemon-api` and run.

    ```console

    $ go install github.com/ddddddO/packemon/cmd/packemon-api@latest

    $ sudo packemon-api --interface wlan0

    ```

1. (REMOTE) Run [`ngrok`](https://ngrok.com/) and note the URL to be paid out.

    ```console

    $ ngrok http 8082

    ```

1. (LOCAL) Enter the dispensed URL into your browser and you will be able to monitor and send packets to remote node.



## Related tools

- [Wireshark](https://www.wireshark.org/)

- [tcpdump](https://www.tcpdump.org/)

- netcat(nc)

- [Nmap](https://nmap.org/)

- [Scapy](https://github.com/secdev/scapy)

- [google/gopacket](https://github.com/google/gopacket) / [gopacket/gopacket](https://github.com/gopacket/gopacket) (maintained)



## Acknowledgment

- [rivo/tview](https://github.com/rivo/tview)

  - Packemon is using this TUI library.



- [Golangで作るソフトウェアルータ](https://booth.pm/ja/items/5290391)

  - The way Go handles syscalls, packet checksum logic, etc. was helpful. Packemon was inspired by this book and began its development. This is a book in Japanese.



## Document

- [ネットワークを知りたくて](https://zenn.dev/openlogi/articles/195d07bd9bc5b4)



```

⌒丶、＿ノ⌒丶、＿ノ⌒丶、＿ノ⌒丶、＿ノ⌒丶、＿ノ⌒丶、＿ノ

 　　　　　　　　　　　　　○

 　　　　　　　　　　　о

 　　　　　　　　　　｡

 

 　　　　　　　　　　,､-､_　　＿_

 　　　　,､-―､_,､'´　　　￣　　`ヽ,

 　　　/　　　　　　 ・　　　 ．　　　ｌ、

 　　　ｌ,　　　　　　 ヾニニつ　　　　`ヽ、

 　　　 |　　　　　　　　　　　　　　　　　 `ヽ,

 　　　 ﾉ　　　　　　　　　　　　　　　　　　ノ

 　　 /::::　　　　　　　　　　　　　　　　　/

 　／:::::::　　　　　　　　　　　　　　　　..::l、

 /::::::::::::::::::......:::::::.　　　　　　　............::::::::::`l,

 l::::::::::::::::::::::::::::::::::::......　　　....:::::::::::::::::::::::::::::`l,

 ヽ,:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::ﾉ

 　　￣￣``ヽ､_:::::::::::::::::::::::,､-―´￣`ヽ､,､-'

 　　　　　　　　 `ヽ―-―'´

 ```



## Stargazers over time

[![Stargazers over time](https://starchart.cc/ddddddO/packemon.svg?variant=adaptive)](https://starchart.cc/ddddddO/packemon)



## Log (japanese)



xxx



## Links

- 「Golangで作るソフトウェアルータ」

  - その実装コード: https://github.com/sat0ken/go-curo

- https://terassyi.net/posts/2020/03/29/ethernet.html

- 動作確認用コマンドの参考

  - https://zenn.dev/takai404/articles/76d47e944d8e18

- [Scrapboxメモ書き](https://scrapbox.io/ddddddo/%E3%83%8D%E3%83%83%E3%83%88%E3%83%AF%E3%83%BC%E3%82%AF%E7%B3%BB%E8%AA%AD%E3%81%BF%E7%89%A9)



- WSL2のDebianで動作した。



- 任意の Ethernet ヘッダ / IPv4 ヘッダ / ARP / ICMP を楽に作れてフレームを送信できる

- 以下はtmuxで3分割した画面に各種ヘッダのフォーム画面を表示している。そして ICMP echo request を送信し、 echo reply が返ってきていることを Wireshark で確認した様子

  ![](./assets/tui_ether_ip_icmp.png)

  ![](./assets/tui_send_icmp_result1.png)

  ![](./assets/tui_send_icmp_result2.png)



- フレームを受信して詳細表示（ARPとIPv4）

  ![](./assets/tui_send_recieve.png)



  少し前のUI（`5062561` のコミット）



  ![](./assets/tui_0428.png)

  ![](./assets/tui_cap_0428.png)



  



- TUIライブラリとして https://github.com/rivo/tview を使わせてもらってる🙇



### 動作確認



#### Raspberry Piで簡易http server

```console

pi@raspberrypi:~ $ sudo go run main.go

```



#### パケットキャプチャ

```console

$ sudo tcpdump -U -i eth0 -w - | /mnt/c/Program\ Files/Wireshark/Wireshark.exe -k -i -

```



- 受信画面



  ```console

  $ sudo go run cmd/packemon/main.go

  ```



- 送信画面



  ```console

  $ sudo go run cmd/packemon/main.go --send

  ```



- 単発フレーム送信コマンド（e.g. ARP request）



  ```console

  $ sudo go run cmd/packemon/main.go --debug --send --proto arp

  ```



#### TLS version 指定でリクエスト

```console

# TLS v1.2 でリクエスト

$ curl -k -s -v --tls-max 1.2 https://192.168.10.112:10443



# TLS v1.3 でリクエスト

$ curl -k -s -v --tls-max 1.3 https://192.168.10.112:10443



# TLS v1.3 で cipher suites を指定してリクエスト（ただし、Client Hello の Cipher Suites のリストが、その指定のみになるわけではなく、一番上（最優先）にくるというもの（パケットキャプチャで確認））

$ curl -k -s -v --tls-max 1.3 --tls13-ciphers "TLS_CHACHA20_POLY1305_SHA256" https://192.168.10.112:10443

```



#### 手軽にブロードキャスト

```console

$ arping -c 1 1.2.3.4

ARPING 1.2.3.4 from 172.23.242.78 eth0

Sent 1 probes (1 broadcast(s))

Received 0 response(s)

```



#### tcpでdns

```console

$ nslookup -vc github.com

```



#### ipv6でping

どうするか



```console

$ ip -6 route

$ ping -c 1 fe80::1

```



#### 自前実装の tcp 3way handshake

```console

$ sudo go run cmd/packemon/main.go --send --debug --proto tcp-3way-http

```



### 動作確認の様子



xxx



- Ethernetフレームのみ作って送信（`77c9149` でコミットしたファイルにて）



  ![](./assets/Frame.png)



- ARPリクエストを作って送信（`390f266` でコミットしたファイルにて。中身はめちゃくちゃと思うけど）



  ![](./assets/ARP.png)



- ARPリクエストを受信してパース（`b6a025a` でコミット）



  ![](./assets/ARP_request_console.png)

  ![](./assets/ARP_request.png)