getaddrinfo_basic_usage.notes

>>> from socket import getaddrinfo
>>> getaddrinfo(None, 'smtp', 0, socket.SOCK_STREAM, 0, socket.AI_PASSIVE)
Traceback (most recent call last):
  File "<input>", line 1, in <module>
NameError: name 'socket' is not defined
>>> import socket
>>> getaddrinfo(None, 'smtp', 0, socket.SOCK_STREAM, 0, socket.AI_PASSIVE)
[(2, 1, 6, '', ('0.0.0.0', 25)), (10, 1, 6, '', ('::', 25, 0, 0))]
>>> getaddrinfo(None, 53, 0, socket.SOCK_DGRAM, 0, socket.AI_PASSIVE)
[(2, 2, 17, '', ('0.0.0.0', 53)), (10, 2, 17, '', ('::', 53, 0, 0))]
>>>
>>> getaddrinfo('127.0.0.1', 'smtp', 0, socket.SOCK_STREAM, 0)
[(2, 1, 6, '', ('127.0.0.1', 25))]
>>> getaddrinfo('localhost', 'smtp', 0, socket.SOCK_STREAM, 0)
[(10, 1, 6, '', ('::1', 25, 0, 0)), (2, 1, 6, '', ('127.0.0.1', 25))]
>>>
#++++++++++++++++++++++++++++++++++++++++++++++++++++++
>>> getaddrinfo('ftp.kernel.org', 'ftp', 0, socket.SOCK_STREAM, 0, socket.AI_ADDRCONFIG | socket.AI_V4MAPPED)
[(2, 1, 6, '', ('198.145.20.140', 21)), (2, 1, 6, '', ('199.204.44.194', 21)), (2, 1, 6, '', ('149.20.4.69', 21))]
>>> getaddrinfo('iana.org', 'www', 0, socket.SOCK_STREAM, 0, socket.AI_ADDRCONFIG | socket.AI_V4MAPPED)
[(2, 1, 6, '', ('192.0.43.8', 80)), (10, 1, 6, '', ('2001:500:88:200::8', 80, 0, 0))]
>>> getaddrinfo('iana.org', 'www', 0, socket.SOCK_STREAM, 0)
[(2, 1, 6, '', ('192.0.43.8', 80)), (10, 1, 6, '', ('2001:500:88:200::8', 80, 0, 0))]
>>> getaddrinfo('iana.org', 'www', 0, socket.SOCK_STREAM, 0, socket.AI_ADDRCONFIG | socket.AI_V4MAPPED | socket.AI_CANONNAME)
[(2, 1, 6, 'iana.org', ('192.0.43.8', 80)), (10, 1, 6, '', ('2001:500:88:200::8', 80, 0, 0))]
>>> mysock = old_sock.accept()
Traceback (most recent call last):
  File "<input>", line 1, in <module>
NameError: name 'old_sock' is not defined
>>> socket.gethostname()
'nsa'
>>> socket.getfqdn()
'nsa.fuckyou.mil'
>>> socket.gethostbyname('cern.ch')
'137.138.144.169'
>>> socket.gethostbyaddr('137.138.144.169')
('webr8.cern.ch', [], ['137.138.144.169'])
>>> socket.getprotobyname('UDP')
17
>>> socket.getservbyname('www')
80
>>> socket.getservbyport(80)
'http'
>>> socket.gethostbyname(socket.getfqdn())
'137.138.144.169'
>>>