chunk-nordic
============
[](https://travis-ci.org/Snawoot/chunk-nordic) [](https://travis-ci.org/Snawoot/chunk-nordic) [](https://pypistats.org/packages/chunk-nordic) [](https://pypi.org/project/chunk-nordic/) [](https://pypi.org/project/chunk-nordic/) [](https://pypi.org/project/chunk-nordic/) [](https://snapcraft.io/chunk-nordic)
Yet another TCP-over-HTTP(S) tunnel.
Client component accepts TCP connections and forwards them to server component via pair of HTTP(S) connections in streaming mode (`Content-Encoding: chunked`). Server component forwards connections to target host and port (e.g. to VPN daemon).
---
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---
## Features
* Multi-link full asynchronous operation.
* Client support operation via proxy server (via HTTP\_PROXY, HTTPS\_PROXY environment variables and .netrc file).
* Advanced TLS support:
* Supports custom CAs for client and server.
* Supports mutual TLS authentication between client and server with certificates.
For TLS reference see "TLS options" group in invokation synopsis.
## Requirements
* Python 3.5.3+
* aiohttp
## Installation
With basic Python event loop:
```
pip3 install chunk-nordic
```
With high performance uvloop event loop:
```
pip3 install chunk-nordic[uvloop]
```
If you prefer distribution via Docker image see Docker Example section below.
Also chunk-nordic is available on Snap Store:
[](https://snapcraft.io/chunk-nordic)
```
sudo snap install chunk-nordic
```
Note that binaries installed by snap are named `chunk-nordic.client` and `chunk-nordic.server`.
## Synopsis
Server:
```
$ chunk-server --help
usage: chunk-server [-h] [-u URI] [-v {debug,info,warn,error,fatal}]
[--disable-uvloop] [-a BIND_ADDRESS] [-p BIND_PORT]
[-w TIMEOUT] [-c CERT] [-k KEY] [-C CAFILE]
dst_host dst_port
Yet another TCP-over-HTTP(S) tunnel. Server-side component.
positional arguments:
dst_host target hostname
dst_port target port
optional arguments:
-h, --help show this help message and exit
-u URI, --uri URI path where connections served (default: /chunk-nordic)
-v {debug,info,warn,error,fatal}, --verbosity {debug,info,warn,error,fatal}
logging verbosity (default: info)
--disable-uvloop do not use uvloop even if it is available (default:
False)
listen options:
-a BIND_ADDRESS, --bind-address BIND_ADDRESS
bind address (default: 127.0.0.1)
-p BIND_PORT, --bind-port BIND_PORT
bind port (default: 8080)
timing options:
-w TIMEOUT, --timeout TIMEOUT
backend connect timeout (default: 4)
TLS options:
-c CERT, --cert CERT enable TLS and use certificate (default: None)
-k KEY, --key KEY key for TLS certificate (default: None)
-C CAFILE, --cafile CAFILE
require client TLS auth using specified CA certs
(default: None)
```
Client:
```
$ chunk-client --help
usage: chunk-client [-h] [-v {debug,info,warn,error,fatal}] [--disable-uvloop]
[-a BIND_ADDRESS] [-p BIND_PORT] [-w TIMEOUT] [-c CERT]
[-k KEY] [-C CAFILE] [--no-hostname-check]
server_url
Yet another TCP-over-HTTP(S) tunnel. Client-side component.
positional arguments:
server_url target hostname
optional arguments:
-h, --help show this help message and exit
-v {debug,info,warn,error,fatal}, --verbosity {debug,info,warn,error,fatal}
logging verbosity (default: info)
--disable-uvloop do not use uvloop even if it is available (default:
False)
listen options:
-a BIND_ADDRESS, --bind-address BIND_ADDRESS
bind address (default: 127.0.0.1)
-p BIND_PORT, --bind-port BIND_PORT
bind port (default: 1940)
timing options:
-w TIMEOUT, --timeout TIMEOUT
server connect timeout (default: 4)
TLS options:
-c CERT, --cert CERT use certificate for client TLS auth (default: None)
-k KEY, --key KEY key for TLS certificate (default: None)
-C CAFILE, --cafile CAFILE
override default CA certs by set specified in file
(default: None)
--no-hostname-check do not check hostname in cert subject. This option is
useful for private PKI and available only together
with "--cafile" (default: False)
```
## Example
Let's assume we have OpenVPN instance on TCP port 1194 at server gate.example.com.
Server command:
```
chunk-server 127.0.0.1 1194
```
Client command:
```
chunk-client http://gate.example.com:8080/chunk-nordic
```
Fragment of client's OpenVPN config:
```
<connection>
remote 127.0.0.1 1940 tcp
</connection>
```
## Docker Example
For environment same as in example above:
Server:
```bash
docker run -dit \
-p 8080:8080 \
--restart unless-stopped \
--name chunk-nordic-server yarmak/chunk-nordic \
server 127.0.0.1 1194
```
Client:
```bash
docker run -dit \
-p 1940:1940 \
--restart unless-stopped \
--name chunk-nordic-server yarmak/chunk-nordic \
client http://gate.example.com:8080/chunk-nordic
```