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py-lreproxy - Python Lre Proxy

Installation

You should downloaded the source package locally and run with command:

Extract project:

tar -xvf py-lreproxy-master.tar.gz -C /usr/src/
mv /usr/src/py-lreproxy-master /usr/src/py-lreproxy

Install psutil:

apt update
apt install python3-pip
pip3 install psutil

Install linux headers:

uname -r
apt install linux-headers-$(uname -r)

Run project with command:

python3 /usr/src/py-lreproxy/pylreproxy.py

Dependencies

Py-lreproxy supports Python3.6+ and test on "Debian GNU/Linux 10 (buster)"

Structure code

In this project, requests are sent to pylreproxy from Kamailio on the UDP socket and then sent to the kernel space via user space.

Each request contains the following commands:

  • P (PING):

    `` request_id P ``

    By sending this request from Kamailio, he sends pylreproxy in response to PONG to inform Kamailio that the was ready.

  • G (CONFIG):

    `` request_id G ``

    By sending this request from Kamailio, he sends pylreproxy in response to this information "start_port, end_port, current_port, internal_ip and external_ip" The config file is in the following path: "/etc/py_lre_proxy/py_lre_proxy.ini"

  • S (DATA):

    `` request_id S src_ip dst_ip s_nat_ip d_nat_ip src_port dst_port s_nat_port d_nat_port timeout call_id ``

    By sending this request from Kamailio to pylreproxy, the data is sent to the kernel space

Config files:

The config file is in /etc/py_lre_proxy/py_lre_proxy.ini path.

Default config:

[DEFAULT]
start_port : 20000
end_port : 30000
current_port : 20000
internal_ip : 192.168.10.226
external_ip : 192.168.10.226

config_file: /etc/py_lre_proxy/py_lre_proxy.ini

socket_udp_host : "127.0.0.1"
socket_udp_port : 8080

forward_to : "/root/sock"

og_level : logging.DEBUG
log_to_file : True
log_to_console : True
log_directory : "/var/log/pylreproxy/"
log_file_name : "pylreproxy.log"

Log files

Use the following command to check lreproxy_module logs:

dmesg -hs

Use the following command to check user_space and pylreproxy logs:

tail -n 1000 -f /var/log/pylreproxy/pylreproxy.log

tail -n 1000 -f /var/log/pylreproxy/user_space.log