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IPv6的替代方案是什么套接字.getfqdn在Python中?

ipv6 dns sockets python

Tony Meyer · 技术社区 · 14 年前

socket.getfqdn() 可以很好地处理IPv4地址,例如:

>>> import socket
>>> socket.getfqdn("8.8.8.8")
'google-public-dns-a.google.com'

但是,它不适用于IPv6地址。

>>> socket.getfqdn("2404:6800:8004::68")
'2404:6800:8004::68'
>>> socket.has_ipv6
True

2 回复 | 直到 14 年前

habnabit dwc 14 年前

你确定ipv6地址有与之相关联的反向DNS吗? dig 报告它没有:

$ dig -x 2404:6800:8004::68

; <<>> DiG 9.4.3-P5 <<>> -x 2404:6800:8004::68
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 35573
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;8.6.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.4.0.0.8.0.0.8.6.4.0.4.2.ip6.arpa. IN PTR

;; Query time: 364 msec
;; SERVER: 12.165.58.2#53(12.165.58.2)
;; WHEN: Thu Sep  2 03:45:50 2010
;; MSG SIZE  rcvd: 90

编辑: 最后找到一个与反向DNS关联的ipv6地址。简言之,我工作。

>>> import socket
>>> socket.has_ipv6
True
>>> socket.getfqdn('2001:838:2:1::30:67')
'gatey.sixxs.net'

从dig:

$ dig -x 2001:838:2:1::30:67

; <<>> DiG 9.4.3-P5 <<>> -x 2001:838:2:1::30:67
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 934
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 13, ADDITIONAL: 1

;; QUESTION SECTION:
;7.6.0.0.0.3.0.0.0.0.0.0.0.0.0.0.1.0.0.0.2.0.0.0.8.3.8.0.1.0.0.2.ip6.arpa. IN PTR

;; ANSWER SECTION:
7.6.0.0.0.3.0.0.0.0.0.0.0.0.0.0.1.0.0.0.2.0.0.0.8.3.8.0.1.0.0.2.ip6.arpa. 43200 IN PTR gatey.sixxs.net.

;; AUTHORITY SECTION:
.                       517204  IN      NS      e.root-servers.net.
.                       517204  IN      NS      m.root-servers.net.
.                       517204  IN      NS      a.root-servers.net.
.                       517204  IN      NS      l.root-servers.net.
.                       517204  IN      NS      c.root-servers.net.
.                       517204  IN      NS      h.root-servers.net.
.                       517204  IN      NS      j.root-servers.net.
.                       517204  IN      NS      g.root-servers.net.
.                       517204  IN      NS      f.root-servers.net.
.                       517204  IN      NS      i.root-servers.net.
.                       517204  IN      NS      d.root-servers.net.
.                       517204  IN      NS      b.root-servers.net.
.                       517204  IN      NS      k.root-servers.net.

;; ADDITIONAL SECTION:
a.root-servers.net.     604222  IN      A       198.41.0.4

;; Query time: 383 msec
;; SERVER: 12.165.58.2#53(12.165.58.2)
;; WHEN: Thu Sep  2 03:55:03 2010
;; MSG SIZE  rcvd: 343

Jeremy Visser 14 年前

你猜怎么着:那个地址没有反向DNS。对于比挖掘更容易理解的输出:

$ host 2404:6800:8004::68
Host 8.6.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.4.0.0.8.0.0.8.6.4.0.4.2.ip6.arpa not found: 3(NXDOMAIN)

以下是具有反向DNS的地址的示例:

$ host 2001:470:0:64::2
2.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.4.6.0.0.0.0.0.0.0.7.4.0.1.0.0.2.ip6.arpa domain name pointer ipv6.he.net.

>>> import socket
>>> socket.getfqdn("2001:470:0:64::2")
'ipv6.he.net'