github.com/mysteriumnetwork/node@v0.0.0-20240516044423-365054f76801/nat/rules.go (about)

     1  /*
     2   * Copyright (C) 2019 The "MysteriumNetwork/node" Authors.
     3   *
     4   * This program is free software: you can redistribute it and/or modify
     5   * it under the terms of the GNU General Public License as published by
     6   * the Free Software Foundation, either version 3 of the License, or
     7   * (at your option) any later version.
     8   *
     9   * This program is distributed in the hope that it will be useful,
    10   * but WITHOUT ANY WARRANTY; without even the implied warranty of
    11   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    12   * GNU General Public License for more details.
    13   *
    14   * You should have received a copy of the GNU General Public License
    15   * along with this program.  If not, see <http://www.gnu.org/licenses/>.
    16   */
    17  
    18  package nat
    19  
    20  import (
    21  	"net"
    22  	"strings"
    23  
    24  	"github.com/mysteriumnetwork/node/config"
    25  	"github.com/rs/zerolog/log"
    26  )
    27  
    28  func protectedNetworks() (nets []*net.IPNet) {
    29  	cfg := config.GetString(config.FlagFirewallProtectedNetworks)
    30  	if cfg == "" {
    31  		return nil
    32  	}
    33  	for _, s := range strings.Split(cfg, ",") {
    34  		_, ipNet, err := net.ParseCIDR(s)
    35  		if err != nil {
    36  			log.Error().Err(err).Msg("Could not parse protected network string")
    37  			continue
    38  		}
    39  		nets = append(nets, ipNet)
    40  	}
    41  	return nets
    42  }