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Why does gethostbyaddr (gethostname ()) return IPv6 IP?

I am working on creating a simple server application using python and I am trying to connect an IP address for listening. The example I reviewed uses this:

HOST = gethostbyaddr(gethostname())

After a little processing after that, he should only give me the host IP address as a string. This should return the IPv4 address. But when I run this code, it returns my IPv6 address. Why is he doing this and how can I get my IPv4 address?

If relevant, I use windows vista and python 2.5

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3 answers

Getting your IP address is harder than you think.

, .

, :

netifaces. , netifaces , , , :

>>> import netifaces
>>> netifaces.interfaces()
['lo', 'eth0']
>>> netifaces.ifaddresses('eth0')
{17: [{'broadcast': 'ff:ff:ff:ff:ff:ff', 'addr': '00:11:2f:32:63:45'}], 2: [{'broadcast': '10.0.0.255', 'netmask': '255.255.255.0', 'addr': '10.0.0.2'}], 10: [{'netmask': 'ffff:ffff:ffff:ffff::', 'addr': 'fe80::211:2fff:fe32:6345%eth0'}]}
>>> for interface in netifaces.interfaces():
...   print netifaces.ifaddresses(interface)[netifaces.AF_INET]
...
[{'peer': '127.0.0.1', 'netmask': '255.0.0.0', 'addr': '127.0.0.1'}]
[{'broadcast': '10.0.0.255', 'netmask': '255.255.255.0', 'addr': '10.0.0.2'}]
>>> for interface in netifaces.interfaces():
...   for link in netifaces.ifaddresses(interface)[netifaces.AF_INET]:
...     print link['addr']
...
127.0.0.1
10.0.0.2

:

from netifaces import interfaces, ifaddresses, AF_INET

def ip4_addresses():
    ip_list = []
    for interface in interfaces():
        for link in ifaddresses(interface)[AF_INET]:
            ip_list.append(link['addr'])
    return ip_list

IPv6, AF_INET6 AF_INET. , netifaces , , , , .

+11

IPv6 IPv4, , , , . getaddrinfo , ,

import sys, socket;
host = socket.gethostname();
result = socket.getaddrinfo(host, None);
print "family:%i socktype:%i proto:%i canonname:%s sockaddr:%s"%result[0];
result = socket.getaddrinfo(host, None, socket.AF_INET);
print "family:%i socktype:%i proto:%i canonname:%s sockaddr:%s"%result[0];
result = socket.getaddrinfo(host, None, socket.AF_INET6);
print "family:%i socktype:%i proto:%i canonname:%s sockaddr:%s"%result[0];

,

family:10 socktype:1 proto:6 canonname: sockaddr:('2002:dce8:d28e::31', 0, 0, 0)
family:2 socktype:1 proto:6 canonname: sockaddr:('10.6.28.31', 0)
family:10 socktype:1 proto:6 canonname: sockaddr:('2002:dce8:d28e::31', 0, 0, 0)
+5

gethostbyaddr() IP- , , , , . gethostbyname(), , , IPv6. Harley , IP-.

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