Est-ce que quelqu'un a déjà vu ça auparavant? Notez que cela se produit non seulement avec google.com, mais avec chaque domaine que j'essaie. C'est une connexion sans fil (WEP), mais je ne sais pas en quoi cela serait pertinent:
$ curl -v google.com
# This takes about 60s to return
* getaddrinfo(3) failed for google.com:80
* Couldn't resolve host 'google.com'
* Closing connection #0
curl: (6) Couldn't resolve host 'google.com'
$ wget google.com
--2011-11-28 14:44:08-- http://google.com/
Resolving google.com... failed: Name or service not known.
wget: unable to resolve host address `google.com'
$ ping google.com
PING google.com (209.85.148.147) 56(84) bytes of data.
64 bytes from fra07s07-in-f147.1e100.net (209.85.148.147): icmp_req=2 ttl=54 time=136 ms
64 bytes from fra07s07-in-f147.1e100.net (209.85.148.147): icmp_req=3 ttl=54 time=34.0 ms
64 bytes from fra07s07-in-f147.1e100.net (209.85.148.147): icmp_req=4 ttl=54 time=34.3 ms
64 bytes from fra07s07-in-f147.1e100.net (209.85.148.147): icmp_req=5 ttl=54 time=42.5 ms
64 bytes from fra07s07-in-f147.1e100.net (209.85.148.147): icmp_req=6 ttl=54 time=44.7 ms
64 bytes from fra07s07-in-f147.1e100.net (209.85.148.147): icmp_req=7 ttl=54 time=34.5 ms
^C
--- google.com ping statistics ---
8 packets transmitted, 6 received, 25% packet loss, time 7007ms
rtt min/avg/max/mdev = 34.063/54.376/136.026/36.758 ms
$ host google.com
google.com has address 209.85.148.106
google.com has address 209.85.148.147
google.com has address 209.85.148.99
google.com has address 209.85.148.103
google.com has address 209.85.148.104
google.com has address 209.85.148.105
google.com mail is handled by 30 alt2.aspmx.l.google.com.
google.com mail is handled by 40 alt3.aspmx.l.google.com.
google.com mail is handled by 50 alt4.aspmx.l.google.com.
google.com mail is handled by 10 aspmx.l.google.com.
google.com mail is handled by 20 alt1.aspmx.l.google.com.
$ host google.com 192.168.1.201
Using domain server:
Name: 192.168.1.201
Address: 192.168.1.201#53
Aliases:
google.com has address 209.85.148.103
google.com has address 209.85.148.104
google.com has address 209.85.148.105
google.com has address 209.85.148.106
google.com has address 209.85.148.147
google.com has address 209.85.148.99
google.com mail is handled by 40 alt3.aspmx.l.google.com.
google.com mail is handled by 50 alt4.aspmx.l.google.com.
google.com mail is handled by 10 aspmx.l.google.com.
google.com mail is handled by 20 alt1.aspmx.l.google.com.
google.com mail is handled by 30 alt2.aspmx.l.google.com.
$ cat /etc/resolv.conf
# Generated by NetworkManager
nameserver 192.168.1.201
$ cat /etc/hosts
127.0.0.1 localhost
::1 localhost
$ netstat -rn
Kernel IP routing table
Destination Gateway Genmask Flags MSS Window irtt Iface
0.0.0.0 192.168.1.254 0.0.0.0 UG 0 0 0 wlan0
127.0.0.0 127.0.0.1 255.0.0.0 UG 0 0 0 lo
192.168.1.0 0.0.0.0 255.255.255.0 U 0 0 0 wlan0
Fondamentalement, aucune application, y compris Firefox, ne peut fonctionner pour effectuer des recherches de nom. De plus, si je mets le wifi hors ligne et que je branche un câble Ethernet, tout va bien.
ping
appelle getaddrinfo avec des paramètres légèrement différents github.com/iputils/iputils/blob/master/ping/ping.c#L574 ai_protocol = IPPROTO_UDP
peut-être que cela confond getaddrinfo différemment d'une manière ou d'une autre? Il semble que la host
commande ne soit pas toujours utilisée non plus: unix.stackexchange.com/a/553438/8337