ネットワーク
**************
Contents:

.. contents::

.. toctree::
   :maxdepth: 1


DNS系のオペレーション
============================
http://sourceforge.net/projects/pydns/
から、
sudo easy_install pydns  

::

 >>> import DNS
 >>> Dns.defaults
 {'rd': 1, 'protocol': 'udp', 'timeout': 30, 'timing': 1, 'opcode': 0, 'server_rotate': 0, 'qtype': 1, 'port': 53, 'server': []}
 >>> Req = DNS.Request(qtype="A", server="8.8.8.8")
 >>> Res = req.req(name="www.google.com")
 >>> res.show()
 (digの出力)
 ;; ANSWERS:
 www.google.com          86399   CNAME   www.l.google.com
 www.l.google.com        299     A       74.125.235.81
 www.l.google.com        299     A       74.125.235.84
 www.l.google.com        299     A       74.125.235.80
 www.l.google.com        299     A       74.125.235.83
 www.l.google.com        299     A       74.125.235.82
 >>> res.header
 {'aa': 0, 'status': 'NOERROR', 'qr': 1, 'nscount': 0, 'opcodestr': 'QUERY', 'qdcount': 1, 'tc': 0, 'rd': 1, 'arcount': 0, 'opcode': 0, 'ra': 1, 'z': 0, 'rcode': 0, 'id': 62156, 'ancount': 6}
 >>> res.answers
 [{'name': 'www.google.com', 'data': 'www.l.google.com', 'typename': 'CNAME', 'classstr': 'IN', 'ttl': 86399, 'type': 5, 'class': 1, 'rdlength': 8}, {'name': 'www.l.google.com', 'data': '74.125.235.81', 'typename': 'A', 'classstr': 'IN', 'ttl': 299, 'type': 1, 'class': 1, 'rdlength': 4}, {'name': 'www.l.google.com', 'data': '74.125.235.84', 'typename': 'A', 'classstr': 'IN', 'ttl': 299, 'type': 1, 'class': 1, 'rdlength': 4}, {'name': 'www.l.google.com', 'data': '74.125.235.80', 'typename': 'A', 'classstr': 'IN', 'ttl': 299, 'type': 1, 'class': 1, 'rdlength': 4}, {'name': 'www.l.google.com', 'data': '74.125.235.83', 'typename': 'A', 'classstr': 'IN', 'ttl': 299, 'type': 1, 'class': 1, 'rdlength': 4}, {'name': 'www.l.google.com', 'data': '74.125.235.82', 'typename': 'A', 'classstr': 'IN', 'ttl': 299, 'type': 1, 'class': 1, 'rdlength': 4}]


GeoIP
===============
http://www.maxmind.com/app/python
より

::

 sudo easy_install pygeoip
 wget http://www.maxmind.com/download/geoip/database/GeoLiteCity.dat.gz
 wget http://www.maxmind.com/download/geoip/database/asnum/GeoIPASNum.dat.gz
 sudo easy_install pygeoip           
 >>> import pygeoip
 >>> gi = pygeoip.GeoIP('/Users/kanai/usr/GeoLiteCity.dat')
 >>> gi.country_code_by_addr('8.8.8.8')
 'US'
 >>> gi.country_name_by_addr('8.8.8.8')
 'United States'
 >>> gi = pygeoip.GeoIP('/Users/kanai/usr/GeoIPASNum.dat')
 >>> gi.org_by_addr('203.178.143.70')
 u'AS2500 WIDE Project'