//go:build linux || darwin || freebsd
// +build linux darwin freebsd

package http

import (
	"net"
	"os"
	"syscall"

	"github.com/fasthttp/router"
	"github.com/valyala/fasthttp"

	"github.com/yunginnanet/HellPot/config"
)

func listenOnUnixSocket(addr string, r *router.Router) error {
	var err error
	var unixAddr *net.UnixAddr
	var unixListener *net.UnixListener
	unixAddr, err = net.ResolveUnixAddr("unix", addr)
	if err == nil {
		// Always unlink sockets before listening on them
		_ = syscall.Unlink(addr)
		// Before we set socket permissions, we want to make sure only the user HellPot is running under
		// has permission to the socket.
		oldmask := syscall.Umask(0o077)
		unixListener, err = net.ListenUnix("unix", unixAddr)
		syscall.Umask(oldmask)
		if err == nil {
			err = os.Chmod(unixAddr.Name, os.FileMode(config.UnixSocketPermissions))
			if err == nil {
				err = fasthttp.Serve(unixListener, r.Handler)
			}
		}
	}
	return err
}