In [1]:

    

import socket


    

In [2]:

    

infolist = socket.getaddrinfo('gatech.edu', 'www')


    

In [3]:

    

infolist


    

    
Out[3]:





[(<AddressFamily.AF_INET: 2>,
  <SocketKind.SOCK_STREAM: 1>,
  6,
  '',
  ('130.207.160.173', 80))]

In [4]:

    

info = infolist[0]


    

In [5]:

    

info


    

    
Out[5]:





(<AddressFamily.AF_INET: 2>,
 <SocketKind.SOCK_STREAM: 1>,
 6,
 '',
 ('130.207.160.173', 80))

In [6]:

    

info[0:3]


    

    
Out[6]:





(<AddressFamily.AF_INET: 2>, <SocketKind.SOCK_STREAM: 1>, 6)

In [7]:

    

s = socket.socket(*info[0:3])


    

In [10]:

    

info[4]


    

    
Out[10]:





('130.207.160.173', 80)

In [11]:

    

s.connect(info[4])


    

In [13]:

    

s.sendall(b'GET / HTTP/1.1\r\nHost:gatech.edu\r\n\r\n')


    

In [14]:

    

s.recv(4096)


    

    
Out[14]:





b'HTTP/1.1 301 http://www.gatech.edu/\r\nServer: Varnish\r\nLocation: http://www.gatech.edu/\r\nAccept-Ranges: bytes\r\nDate: Thu, 10 Aug 2017 13:05:10 GMT\r\nX-Varnish: 225129802\r\nAge: 0\r\nVia: 1.1 varnish\r\nConnection: close\r\nX-Cache: MISS\r\n\r\n'

In [15]:

    

infolist = socket.getaddrinfo('google.com', 'www')


    

In [17]:

    

infolist


    

    
Out[17]:





[(<AddressFamily.AF_INET: 2>,
  <SocketKind.SOCK_STREAM: 1>,
  6,
  '',
  ('216.58.203.206', 80)),
 (<AddressFamily.AF_INET6: 10>,
  <SocketKind.SOCK_STREAM: 1>,
  6,
  '',
  ('2404:6800:4009:802::200e', 80, 0, 0))]

In [18]:

    

sock_ipv6 = socket.socket(*infolist[1][0:3])


    

In [19]:

    

sock_ipv6


    

    
Out[19]:





<socket.socket fd=54, family=AddressFamily.AF_INET6, type=SocketKind.SOCK_STREAM, proto=6, laddr=('::', 0, 0, 0)>

In [20]:

    

# Using getaddrinfo() to Bind Your Server to a Port


    

In [21]:

    

from socket import getaddrinfo


    

In [23]:

    

getaddrinfo(None, 'smtp', 0, socket.SOCK_STREAM, 0, socket.AI_PASSIVE)


    

    
Out[23]:





[(<AddressFamily.AF_INET: 2>,
  <SocketKind.SOCK_STREAM: 1>,
  6,
  '',
  ('0.0.0.0', 25)),
 (<AddressFamily.AF_INET6: 10>,
  <SocketKind.SOCK_STREAM: 1>,
  6,
  '',
  ('::', 25, 0, 0))]

In [25]:

    

getaddrinfo(None, 53, 0, socket.SOCK_DGRAM, 0, socket.AI_PASSIVE)


    

    
Out[25]:





[(<AddressFamily.AF_INET: 2>,
  <SocketKind.SOCK_DGRAM: 2>,
  17,
  '',
  ('0.0.0.0', 53)),
 (<AddressFamily.AF_INET6: 10>,
  <SocketKind.SOCK_DGRAM: 2>,
  17,
  '',
  ('::', 53, 0, 0))]

In [26]:

    

#  binding to localhost


    

In [27]:

    

getaddrinfo('127.0.01', 'smtp', 0, socket.SOCK_STREAM,0)


    

    
Out[27]:





[(<AddressFamily.AF_INET: 2>,
  <SocketKind.SOCK_STREAM: 1>,
  6,
  '',
  ('127.0.0.1', 25))]

In [28]:

    

getaddrinfo('127.0.0.1', 53, 0, socket.SOCK_DGRAM, 0)


    

    
Out[28]:





[(<AddressFamily.AF_INET: 2>,
  <SocketKind.SOCK_DGRAM: 2>,
  17,
  '',
  ('127.0.0.1', 53))]

In [38]:

    

getaddrinfo('localhost', 443, 0, socket.SOCK_STREAM, 0)


    

    
Out[38]:





[(<AddressFamily.AF_INET: 2>,
  <SocketKind.SOCK_STREAM: 1>,
  6,
  '',
  ('127.0.0.1', 443))]

In [39]:

    

getaddrinfo('localhost', 8080, 0, socket.SOCK_STREAM, 0)


    

    
Out[39]:





[(<AddressFamily.AF_INET: 2>,
  <SocketKind.SOCK_STREAM: 1>,
  6,
  '',
  ('127.0.0.1', 8080))]

In [40]:

    

getaddrinfo('localhost', 'smtp', 0, socket.SOCK_STREAM,0)


    

    
Out[40]:





[(<AddressFamily.AF_INET: 2>,
  <SocketKind.SOCK_STREAM: 1>,
  6,
  '',
  ('127.0.0.1', 25))]

In [41]:

    

''' Using getaddrinfo() to Connect to a Service
AI_ADDRCONFIG flag filters out any addresses that are impossible for your computer to reach. 
AI_V4MAPPED return the IPv4 addresses reencoded as IPv6 addresses that you can actually use '''


    

    
Out[41]:





' Using getaddrinfo() to Connect to a Service\nAI_ADDRCONFIG flag filters out any addresses that are impossible for your computer to reach. \nAI_V4MAPPED return the IPv4 addresses reencoded as IPv6 addresses that you can actually use '

In [43]:

    

getaddrinfo('ftp.mozilla.org', 'ftp', 0, socket.SOCK_STREAM, 0, socket.AI_ADDRCONFIG | socket.AI_V4MAPPED)


    

    
Out[43]:





[(<AddressFamily.AF_INET: 2>,
  <SocketKind.SOCK_STREAM: 1>,
  6,
  '',
  ('54.230.78.219', 21))]

In [44]:

    

getaddrinfo('iana.org', 'www', 0, socket.SOCK_STREAM, 0, socket.AI_ADDRCONFIG | socket.AI_V4MAPPED)


    

    
Out[44]:





[(<AddressFamily.AF_INET: 2>,
  <SocketKind.SOCK_STREAM: 1>,
  6,
  '',
  ('192.0.43.8', 80)),
 (<AddressFamily.AF_INET6: 10>,
  <SocketKind.SOCK_STREAM: 1>,
  6,
  '',
  ('2001:500:88:200::8', 80, 0, 0))]

In [45]:

    

getaddrinfo('iana.org', 'www', 0, socket.SOCK_STREAM, 0)


    

    
Out[45]:





[(<AddressFamily.AF_INET: 2>,
  <SocketKind.SOCK_STREAM: 1>,
  6,
  '',
  ('192.0.43.8', 80)),
 (<AddressFamily.AF_INET6: 10>,
  <SocketKind.SOCK_STREAM: 1>,
  6,
  '',
  ('2001:500:88:200::8', 80, 0, 0))]

In [46]:

    

# Asking getaddrinfo() for a Canonical Hostname


    

In [50]:

    

getaddrinfo('iana.org', 'www', 0, socket.SOCK_STREAM, 0, socket.AI_ADDRCONFIG | socket.AI_V4MAPPED| socket.AI_CANONNAME)


    

    
Out[50]:





[(<AddressFamily.AF_INET: 2>,
  <SocketKind.SOCK_STREAM: 1>,
  6,
  'iana.org',
  ('192.0.43.8', 80)),
 (<AddressFamily.AF_INET6: 10>,
  <SocketKind.SOCK_STREAM: 1>,
  6,
  '',
  ('2001:500:88:200::8', 80, 0, 0))]

In [51]:

    

getaddrinfo('google.com', 'www', 0, socket.SOCK_STREAM, 0, socket.AI_CANONNAME)


    

    
Out[51]:





[(<AddressFamily.AF_INET: 2>,
  <SocketKind.SOCK_STREAM: 1>,
  6,
  'google.com',
  ('216.58.220.14', 80)),
 (<AddressFamily.AF_INET6: 10>,
  <SocketKind.SOCK_STREAM: 1>,
  6,
  '',
  ('2607:f8b0:4002:810::200e', 80, 0, 0))]

In [52]:

    

# to resolve those fancy new domain names that have Unicode characters in them.


    

In [57]:

    

getaddrinfo('中央大学.tw', 'www', 0, socket.SOCK_STREAM, 0,socket.AI_ADDRCONFIG | socket.AI_V4MAPPED)


    

    
Out[57]:





[(<AddressFamily.AF_INET: 2>,
  <SocketKind.SOCK_STREAM: 1>,
  6,
  '',
  ('140.115.17.82', 80)),
 (<AddressFamily.AF_INET6: 10>,
  <SocketKind.SOCK_STREAM: 1>,
  6,
  '',
  ('2001:288:3001:17::82', 80, 0, 0))]

In [58]:

    

'中央大学.tw'.encode('idna')


    

    
Out[58]:





b'xn--fiq80yua78t.tw'

In [59]:

    

socket.gethostbyname('xn--fiq80yua78t.tw')


    

    
Out[59]:





'140.115.17.82'

In [60]:

    

# Primitive Name Service Routines


    

In [61]:

    

socket.gethostname()


    

    
Out[61]:





'gaurav-HP-Notebook'

In [62]:

    

socket.getfqdn()


    

    
Out[62]:





'gaurav-HP-Notebook'

In [3]:

    

socket.gethostbyname('google.com')


    

    
Out[3]:





'216.58.220.14'

In [4]:

    

socket.gethostbyaddr('216.58.220.14')


    

    
Out[4]:





('bom05s05-in-f14.1e100.net', [], ['216.58.220.14'])

In [5]:

    

socket.gethostbyname('cern.ch')


    

    
Out[5]:





'188.184.9.234'

In [6]:

    

socket.gethostbyaddr('188.184.9.234')


    

    
Out[6]:





('webrlb01.cern.ch', [], ['188.184.9.234'])

In [7]:

    

socket.getprotobyname('UDP')


    

    
Out[7]:





17

In [11]:

    

socket.getprotobyname('tcp')


    

    
Out[11]:





6

In [13]:

    

socket.gethostbyname(socket.getfqdn())


    

    
Out[13]:





'127.0.1.1'

In [ ]: