tcp_tee

A network utility to forward and dump tcp port data.

Connection before:

client <-------> server

Connection with tcp_tee:

client  <--- tcp_tee ---> server
              |
              v
              ./request.log
              ./responce.log

Tcp_tee utility listens on some tcp port (8080 by default) and forwards all data to a server you want (127.0.0.1:80 by default). Tcp_tee saves all transmitted data to .log files.

It is usefull to quickly monitor http traffic or other tcp traffic. It is a simplified tcpdump alternative which is compatible with most OSes.

Usage:
tcp_tee [--listen_port 8080] [--forward_address 127.0.0.1] [--forward_port 80] [--request_log_file request.log ] [--responce_log_file responce.log]

Usage example:

$tcp_tee --listen_port 8080 --forward_address some-site.com --forward_port 80  &     #run tcp_tee in background
$curl http://127.0.0.1:8080/index.html                                               #get http://some-site.com/index.html 
$cat request.log                                                                     #show request
$cat responce.log                                                                    #show responce

Build from source

run build.sh or run the following commands:

mkdir build
cd build
conan install ..
#conan install --build missing .. 
cmake .. 
cmake --build . 

If you face strange linkage errors then check if conan package manager is configured to use c++11 ABI. You should see the following output in order to solve them:

$ grep compiler.libcxx ~/.conan/profiles/default
compiler.libcxx=libstdc++11

Compatibility

Checked on

• Ubuntu 22, gcc 11.3
• Windows 10, MSVS 2022

Licence

You are free to use or modify this code.