This is a Golang implementation of the OpenConnect VPN Protocol for client side development.

For desktop OS, similar to Cisco Secure Client's vpnagentd, it should be run as a separate background service with root privileges, so that the front-end UI does not require an administrator authorization every time it starts. The API is exposed through the WebSocket and JSON-RPC 2.0 protocols. Anyone can use any front-end tool to implement their own GUI.

Here is an example showing how to use this project.

Note: The implementation of the VPN protocol itself has nothing to do with the routing table settings of the operating system. This repository contains simple routing settings under Linux. It would be great if someone has a more elegant implementation of cross-platform routing table operations.

Currently the following servers are supported,

• ocserv
• anylink

The full VPN workflow test is currently only available under Linux, You can use any WebSocket tool to test the API.

ws://127.0.0.1:6210/rpc

{
  "jsonrpc": "2.0",
  "method": "status",
  "id": 0
}

{
  "jsonrpc": "2.0",
  "method": "config",
  "params": {
    "log_level": "Debug",
    "log_path": "/tmp/test.log"
  },
  "id": 1
}

{
  "jsonrpc": "2.0",
  "method": "connect",
  "params": {
    "host": "vpn.test.com",
    "username": "vpn",
    "password": "123456",
    "group": ""
  },
  "id": 2
}

{
  "jsonrpc": "2.0",
  "method": "disconnect",
  "id": 3
}

{
  "jsonrpc": "2.0",
  "method": "reconnect",
  "id": 4
}

{
  "jsonrpc": "2.0",
  "method": "stat",
  "id": 7
}