github.com/mysteriumnetwork/node@v0.0.0-20240516044423-365054f76801/router/network/network_windows.go (about)

     1  //go:build windows
     2  
     3  /*
     4   * Copyright (C) 2020 The "MysteriumNetwork/node" Authors.
     5   *
     6   * This program is free software: you can redistribute it and/or modify
     7   * it under the terms of the GNU General Public License as published by
     8   * the Free Software Foundation, either version 3 of the License, or
     9   * (at your option) any later version.
    10   *
    11   * This program is distributed in the hope that it will be useful,
    12   * but WITHOUT ANY WARRANTY; without even the implied warranty of
    13   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    14   * GNU General Public License for more details.
    15   *
    16   * You should have received a copy of the GNU General Public License
    17   * along with this program.  If not, see <http://www.gnu.org/licenses/>.
    18   */
    19  
    20  package network
    21  
    22  import (
    23  	"fmt"
    24  	"net"
    25  	"os/exec"
    26  
    27  	"github.com/jackpal/gateway"
    28  )
    29  
    30  // RoutingTable implements a set of platform specific tool for creating, deleting
    31  // and observe routing tables rules for a different needs.
    32  type RoutingTable struct{}
    33  
    34  // DiscoverGateway returns system default gateway.
    35  func (t *RoutingTable) DiscoverGateway() (net.IP, error) {
    36  	return gateway.DiscoverGateway()
    37  }
    38  
    39  // ExcludeRule adds a single IP address to be excluded from the main tunnelled traffic.
    40  // Traffic sent to the IP address will be directed to the system default gaitway
    41  // instead of tunnel.
    42  func (t *RoutingTable) ExcludeRule(ip, gw net.IP) error {
    43  	out, err := exec.Command("powershell", "-Command", "route add "+ip.String()+"/32 "+gw.String()).CombinedOutput()
    44  	return fmt.Errorf("%s: %w", string(out), err)
    45  }
    46  
    47  // DeleteRule removes excluded routing table rule to return it back to routing
    48  // thought the tunnel.
    49  func (t *RoutingTable) DeleteRule(ip, gw net.IP) error {
    50  	out, err := exec.Command("powershell", "-Command", "route delete "+ip.String()+"/32").CombinedOutput()
    51  	if err != nil {
    52  		return fmt.Errorf("failed to delete route: %w, %s", err, string(out))
    53  	}
    54  
    55  	return nil
    56  }