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

     1  //go:build !windows && !android
     2  
     3  /*
     4   * Copyright (C) 2019 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 dns
    21  
    22  import (
    23  	"github.com/miekg/dns"
    24  	"github.com/pkg/errors"
    25  )
    26  
    27  // configuration returns the system DNS configuration.
    28  func configuration() (*dns.ClientConfig, error) {
    29  	config, err := dns.ClientConfigFromFile("/etc/resolv.conf")
    30  	return config, errors.Wrap(err, "error loading DNS config")
    31  }
    32  
    33  // ConfiguredServers returns DNS server IPs from the system DNS configuration.
    34  func ConfiguredServers() ([]string, error) {
    35  	config, err := configuration()
    36  	if err != nil {
    37  		return nil, err
    38  	}
    39  	return config.Servers, nil
    40  }