github.com/mysteriumnetwork/node@v0.0.0-20240516044423-365054f76801/core/ip/fallbacks.go (about)

     1  /*
     2   * Copyright (C) 2021 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 ip
    19  
    20  import (
    21  	"errors"
    22  	"io"
    23  	"net"
    24  	"strings"
    25  
    26  	"github.com/mysteriumnetwork/node/requests"
    27  	"github.com/mysteriumnetwork/node/utils/random"
    28  )
    29  
    30  // IPFallbackAddresses represents the various services we can use to fetch our public IP.
    31  var IPFallbackAddresses = []string{
    32  	"https://api.ipify.org",
    33  	"https://ip2location.io/ip",
    34  	"https://ipinfo.io/ip",
    35  	"https://api.ipify.org",
    36  	"https://ifconfig.me",
    37  	"https://www.trackip.net/ip",
    38  	"https://checkip.amazonaws.com/",
    39  	"https://icanhazip.com",
    40  	"https://ipecho.net/plain",
    41  	"https://ident.me/",
    42  	"http://whatismyip.akamai.com/",
    43  }
    44  
    45  var rng = random.NewTimeSeededRand()
    46  
    47  func shuffleStringSlice(slice []string) []string {
    48  	tmp := make([]string, len(slice))
    49  	copy(tmp, slice)
    50  	rng.Shuffle(len(tmp), func(i, j int) {
    51  		tmp[i], tmp[j] = tmp[j], tmp[i]
    52  	})
    53  	return tmp
    54  }
    55  
    56  // RequestAndParsePlainIPResponse requests and parses a plain IP response.
    57  func RequestAndParsePlainIPResponse(c *requests.HTTPClient, url string) (string, error) {
    58  	req, err := requests.NewGetRequest(url, "", nil)
    59  	if err != nil {
    60  		return "", err
    61  	}
    62  
    63  	res, err := c.Do(req)
    64  	if err != nil {
    65  		return "", err
    66  	}
    67  	defer res.Body.Close()
    68  
    69  	r, err := io.ReadAll(res.Body)
    70  	if err != nil {
    71  		return "", err
    72  	}
    73  
    74  	ipv4addr := net.ParseIP(strings.TrimSpace(string(r)))
    75  	if ipv4addr == nil {
    76  		return "", errors.New("could not parse ip response")
    77  	}
    78  	return ipv4addr.String(), err
    79  }