IPv6 address representation in Python -


i converting ipv6 addresses textual representation , noticed behavior not explain:

in[38]: socket.inet_ntop(socket.af_inet6, '\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xff\xff\x7f\x00\x00\x01') out[38]: '::ffff:127.0.0.1' in[39]: socket.inet_ntop(socket.af_inet6, '\x00\x00\x00\x00\x00\x00\x00\x00\x00\xff\xff\xff\x7f\x00\x00\x00') out[39]: '::ff:ffff:7f00:0'

i surprised see ::ffff:127.0.0.1, i'd expect ::ffff:7f00:0. standard or @ least common? ipv6 addresses represented way? wikipedia article doesn't mention @ all. confused.

the posix page inet_ntop specifies format 1 of options (slightly paraphrased):

a third form more convenient when dealing mixed environment of ipv4 , ipv6 nodes x:x:x:x:x:x:d.d.d.d, x characters hexadecimal values of 6 high-order 16-bit pieces of address, , d characters decimal values of 4 low-order 8-bit pieces of address (standard ipv4 representation).


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