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1. Connaître son adresse ip

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   -- Nécessite le programme links

   1 #!/bin/bash
   2 
   3 links -dump  http://www.whatismyip.com/automation/n09230945.asp | sed -e 's/ //g'
   

   Posted by raf to shell ip shell links ... saved by 4 persons ... 2 comments ... 1 year

2. dynamic dns daemon

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   This program allow to update a dns from a dynamic ip. It use nsupdate to add and delete any record from a dns zone. It update it securly thanks a key you set before. Currently it support only anames.

     1 #!/usr/local/bin/python2.4
     2 #
     3 # Copyright (c) 2007 Benoit Chesneau <benoit@bchesneau.info>
     4 #
     5 # Permission to use, copy, modify, and distribute this software for any
     6 # purpose with or without fee is hereby granted, provided that the above
     7 # copyright notice and this permission notice appear in all copies.
     8 #
     9 # THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
    10 # WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
    11 # MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
    12 # ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
    13 # WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
    14 # ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
    15 # OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
    16 #
    17 # Description :
    18 # This program allow to update a dns from a dynamic ip. It use nsupdate to add
    19 # and delete any record from a dns zone. It update it securly thanks a key you 
    20 # set before. Currently it support only anames.
    21 #
    22 # It require to create a configuration file /etc/ddns.conf or ~/.ddns.conf :
    23 # add a zone like this :
    24 # [domain1]
    25 # key=<path to your private key>
    26 # server = <name of dns>
    27 # zone = <zone name>
    28 # anames = <anames you want to add/update>
    29 #
    30 # Add as any zone you want by creating section [domainXX] in your 
    31 # configuration file.
    32 #
    33 #
    34 # For more information on setting your dns ypu can go here :
    35 # * nsupdate: Painless Dynamic DNS: http://linux.yyz.us/nsupdate/
    36 # * A DDNS Server Using BIND and Nsupdate : http://www.oceanwave.com/technical-resources/unix-admin/nsupdate.html
    37 # * DynDNS et Subzone ARPA : http://wiki.gcu.info/doku.php?id=unix:dyndns&s=bind
    38 
    39 
    40 import re
    41 import urllib
    42 import ConfigParser
    43 import os
    44 import time
    45 
    46 checkip_urls = (
    47         (r'Current IP Address:\s(?P<ip>[^<]*)', 'http://checkip.dyndns.org/'),
    48         (r'Current Address:\s(?P<ip>.*)$', 'http://ipdetect.dnspark.com/'),
    49 )
    50 
    51 rIP=re.compile("(\d{1,3}(\.\d{1,3}){3})(?!/\d+)")
    52 cmd = '/usr/sbin/nsupdate'
    53 
    54 def get_ip():
    55     """
    56     For now we get dynamic ip only from web.
    57     TODO: add detection from interface and router
    58     """
    59     f = None;
    60     ip=None
    61     for u in checkip_urls:
    62         pat = re.compile(u[0]);
    63         try:
    64             f = urllib.urlopen(u[1])
    65         except:
    66             continue
    67 
    68         if f:
    69             for line in f.readlines():
    70                 match = pat.search(line)
    71                 if match is not None:
    72                     ip=match.group('ip')
    73                     if rIP.search(ip):
    74                         return ip
    75         
    76     return ip
    77 
    78 def get_conffile():
    79     conffiles = ("~/.ddns.conf", "/etc/ddns.conf",)
    80     for c in conffiles:
    81         path = os.path.expanduser(c)
    82         if os.path.exists(path):
    83             return path 
    84     return None
    85 
    86 def get_conf():
    87     domains = [] 
    88     config = ConfigParser.ConfigParser()
    89     config.read(get_conffile())
    90     for section in config.sections():
    91         if section.startswith('domain'):
    92             anames = config.get(section, 'anames').split(',')
    93             domains.append({
    94                 'key_path': config.get(section, 'key'),
    95                 'anames': [aname.strip() for aname in anames],
    96                 'server': config.get(section, 'server').strip(),
    97                 'zone': config.get(section, 'zone').strip(),
    98             })
    99     return domains
   100 
   101 def nsupdate(domain, ip):
   102     tmp_path = '/var/tmp/.ddns_%s.txt' % domain['server']
   103     aname_str=""
   104     for aname in domain['anames']:
   105         if aname_str != "": aname_str="\n"
   106         aname_str+="""update delete %(aname)s A
   107 update add %(aname)s 60 A %(ip)s
   108 show
   109 send""" % {
   110                 'aname': aname,
   111                 'ip': ip,
   112         }
   113     tmp_str = """server %(server)s
   114 zone %(zone)s
   115 %(aname_str)s
   116 """ % {
   117             'server': domain['server'],
   118             'zone': domain['zone'],
   119             'aname_str': aname_str,
   120     
   121             
   122     }
   123 
   124     fdomain = open(tmp_path, 'w+')
   125     fdomain.write(tmp_str)
   126     fdomain.close()
   127     cmd_str = "%s -k %s -v %s" % (cmd,domain['key_path'],tmp_path)
   128     os.system(cmd_str)
   129 
   130 def update_dns():
   131     ip_path = "/var/tmp/.ddns_ip"
   132     while True:
   133         ip=get_ip()
   134         if os.path.exists(ip_path):
   135             f = open(ip_path, 'r')
   136             old_ip = f.readline()
   137             f.close()
   138         else:
   139             old_ip = ""
   140         
   141         if ip != old_ip:
   142             f=open(ip_path, 'w')
   143             f.write(ip)
   144             f.close()
   145             domains = get_conf()
   146             if not domains:
   147                 print 'no domain configured yet.'
   148                 os._exit(1)
   149             for domain in domains:
   150                 nsupdate(domain, ip)
   151 
   152         time.sleep(60)
   153 
   154 
   155 ip=get_ip()
   156 domains = get_conf()
   157 if not domains:
   158     print 'no domain configured yet.'
   159     os._exit(1)
   160 
   161 try:
   162     if os.fork() > 0: os._exit(0) # exit father...
   163 except OSError, error:
   164     print 'fork #1 failed: %d (%s)' % (error.errno, error.strerror)
   165     os._exit(1)
   166 
   167 os.chdir('/')
   168 os.setsid()
   169 os.umask(0)
   170 
   171 try:
   172     pid = os.fork()
   173     if pid > 0:
   174         f = open('/tmp/ddns.pid', 'w')
   175         f.write("%i" % pid)
   176         f.close()
   177         os._exit(0)
   178 except OSError, error:
   179     print 'fork #2 failed: %d (%s)' % (error.errno, error.strerror)
   180     os._exit(1)
   181 
   182 update_dns()
   

   Posted by benoitc to python dns daemon ip shell ... saved by 4 persons ... 1 comments ... 1 year

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