158 lines
5.0 KiB
Python
158 lines
5.0 KiB
Python
#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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#
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# Copyright 2016 Grégory Soutadé
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#
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# This file is part of iptogeo.
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#
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# iptogeo is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# iptogeo is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with iptogeo. If not, see <http://www.gnu.org/licenses/>.
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#
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import socket
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import struct
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class IPToGeoException(Exception):
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pass
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class IPToGeo(object):
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MAGIC = 0x179E08EF
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VERSION = 1
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REQ = 1
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RESP = 0
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IPV4 = 4
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IPV6 = 16
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IP_NOT_FOUND = 6
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PACKET_SIZE = 32
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ERRORS = {1 : 'Bad magic',
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2 : 'Bad version',
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3 : 'Bad request field' ,
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4 : 'Bad IP version',
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5 : 'Unsupported IP version',
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6 : 'IP not found'}
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MAX_REQUESTS = 50
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def __init__(self, remote_addr='127.0.0.1', remote_port=53333, timeout=None, family=socket.AF_INET):
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self._remote_addr = remote_addr
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self._remote_port = remote_port
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self._timeout = timeout
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self._family = family
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self._nb_requests_sent = self.MAX_REQUESTS # Force socket creation
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self._socket = None
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def _create_socket(self):
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if self._socket:
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self._socket.close()
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self._socket = socket.socket(self._family, socket.SOCK_STREAM)
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if not self._timeout is None:
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self._socket.settimeout(self._timeout)
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self._socket.connect((self._remote_addr, self._remote_port))
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def _extend_ipv6(self, ipv6):
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tmp = ''
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for s in ipv6.split(':'):
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if not s: break
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while len(s) != 4:
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s = '0' + s
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tmp += s
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while len(tmp) < 16*2:
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tmp += '0'
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res = ''
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for i in range(0, 15*2, 2):
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res += tmp[i] + tmp[i+1] + ':'
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res += tmp[30] + tmp[31]
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return res
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def _create_request(self, ip, ip_type):
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packet = b''
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packet += struct.pack('<IBBBBI', IPToGeo.MAGIC, IPToGeo.VERSION, IPToGeo.REQ,
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0, #err
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ip_type, # ip type
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0) # flags
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for i in ip:
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packet += struct.pack('<B', i) # ipv4
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packet += struct.pack('<III', 0, 0, 0) # ipv6
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packet += struct.pack('<I', 0) # country code
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return packet
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def _check_request(self, packet):
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(magic, version, req, err, ip_type, flags, ipv4, ipv6b, ipv6c, ipv6d) = struct.unpack_from('<IBBBBIIIII', packet, 0)
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if magic != IPToGeo.MAGIC:
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raise IPToGeoException('Invalid magic %08x' % (magic))
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ip_res = '%08x' % (ipv4)
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if ip_type == IPToGeo.IPV6:
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ip_res += '%08x' % (ipv6b)
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ip_res += '%08x' % (ipv6c)
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ip_res += '%08x' % (ipv6d)
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if err == IPToGeo.IP_NOT_FOUND: return (ip_res, None) # IP not found
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if err != 0:
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raise IPToGeoException(IPToGeo.ERRORS[err])
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(cc0, cc1, cc2, cc3) = struct.unpack_from('BBBB', packet, 7*4)
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return (ip_res, '%c%c%c%c' % (cc0, cc1, cc2, cc3))
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def _send_request(self, packet, second_chance=True):
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self._nb_requests_sent += 1
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if self._nb_requests_sent >= self.MAX_REQUESTS:
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self._create_socket()
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self._nb_requests_sent = 0
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try:
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self._socket.send(packet)
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packet = self._socket.recv(IPToGeo.PACKET_SIZE)
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if not packet:
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raise socket.timeout
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return packet
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except socket.timeout as e:
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if second_chance:
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self._nb_requests_sent = self.MAX_REQUESTS
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return self._send_request(packet, False)
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else:
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raise e
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def ip_to_geo(self, ip):
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ip_type = IPToGeo.IPV4
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if ip.find('.') >= 0:
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splitted_ip = [int(a) for a in ip.split('.')]
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if len(splitted_ip) != 4:
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raise Exception('Bad IP %s' % (ip))
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elif ip.find(':') >= 0:
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splitted_ip = [int(a, 16) for a in self._extend_ipv6(ip).split(':')]
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if len(splitted_ip) != 16:
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raise Exception('Bad IP %s' % (ip))
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ip_type = IPToGeo.IPV6
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else:
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raise Exception('Bad IP %s' % (ip))
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packet = self._create_request(splitted_ip, ip_type)
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packet = self._send_request(packet)
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(ip, country_code) = self._check_request(packet)
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if country_code:
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# convert to string
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country_code = '%c%c' % (country_code[0], country_code[1])
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return (ip, country_code)
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def close(self):
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self._socket.close()
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