Re: [squid-users] Help - Squid 3.2.0.4 - IPV6 - Crashes

 On Sat, 19 Mar 2011 21:10:51 -0000, Steve wrote:
> Hi all,
>
> I wonder if anyone can help. I am using Squid 3.2.0.4 compiled with
> -disable-ipv6. Whenever I access hosts that have AAAA records as well
> as A
> records then an attempt is made to access them using IPv6. My network
> doesn't have IPv6 so it is no surprise the attempts to connect to
> IPv6
> destinations do not work. Given that I have compiled with
> -disable-ipv6
> option I would not expect Squid to even bother looking up the AAAA
> records.
> Squid also crashes and automatically restarts after the connect to an
> IPv6
> address fails.
>
> I have included a relevant log extract below showing the problem as
> well as
> output from squid -v.
>
> Is there any way to force Squid to fully ignore ipV6?
>
> Any assistance or pointers would be gratefully received.
>
> Thanks
> Steve
>
> Squid Cache: Version 3.2.0.4
> configure options: '--prefix=/usr/arcadia/Squid_0'
> '--enable-replacement-policies=heap,lru' '--enable-snmp'
> '--enable-delay-pools' '--enable-removal-policies=heap,lru'
> '--enable-useragent-log' '--enable-auth' '--enable-auth-basic=LDAP'
> '--enable-external-acl-helpers=LDAP_group' '--disable-ipv6'
> --enable-ltdl-convenience
>
>
> 2011/03/16 23:27:25.278 kid1| idnsALookup: buf is 39 bytes for
> secure.nominet.org.uk, id = 0x0
> 2011/03/16 23:27:25.296 kid1| idnsRead: starting with FD 8
> 2011/03/16 23:27:25.296 kid1| commSetSelect(FD
> 8,type=1,handler=1,client_data=0,timeout=0)
> 2011/03/16 23:27:25.296 kid1| comm_udp_recvfrom: FD 8 from [::]
> 2011/03/16 23:27:25.296 kid1| idnsRead: FD 8: received 91 bytes from
> 10.99.99.55:53
> 2011/03/16 23:27:25.296 kid1| idnsGrokReply: QID 0xb731, 2 answers
> 2011/03/16 23:27:25.296 kid1| idnsGrokReply: secure.nominet.org.uk
> AAAA
> query done. Configured to retrieve A now also.
> 2011/03/16 23:27:25.296 kid1| comm_udp_recvfrom: FD 8 from
> 10.99.99.55:53
> 2011/03/16 23:27:25.300 kid1| comm_select(): got FD 8 events=1
> monitoring=19
> F->read_handler=1 F->write_handler=0
> 2011/03/16 23:27:25.300 kid1| comm_select(): Calling read handler on
> FD 8
> 2011/03/16 23:27:25.300 kid1| idnsRead: starting with FD 8
> 2011/03/16 23:27:25.300 kid1| commSetSelect(FD
> 8,type=1,handler=1,client_data=0,timeout=0)
> 2011/03/16 23:27:25.300 kid1| comm_udp_recvfrom: FD 8 from [::]
> 2011/03/16 23:27:25.300 kid1| idnsRead: FD 8: received 79 bytes from
> 10.99.99.55:53
> 2011/03/16 23:27:25.300 kid1| idnsGrokReply: QID 0xb000, 2 answers
> 2011/03/16 23:27:25.300 kid1| dns_internal.cc(1197) idnsGrokReply:
> Merging
> DNS results secure.nominet.org.uk AAAA has 2 RR, A has 2 RR
> 2011/03/16 23:27:25.300 kid1| dns_internal.cc(1221) idnsGrokReply:
> Sending 4
> DNS results to caller.
> 2011/03/16 23:27:25.300 kid1| comm.cc(1033) connect: to
> [2a01:618:300:1:3a0:b555:5db7:f25d]:443
> 2011/03/16 23:27:25.300 kid1| comm.cc(1163) comm_connect_addr:
> connecting
> socket FD 15 to [2a01:618:300:1:3a0:b555:5db7:f25d]:443 (want family:
> 2)
> 2011/03/16 23:27:25.300 kid1| comm.cc(1049) connect: FD 15:
> COMM_ERR_PROTOCOL - try again
> 2011/03/16 23:27:25.300 kid1| commSetSelect(FD
> 15,type=0,handler=0,client_data=0,timeout=0)
> 2011/03/16 23:27:25.300 kid1| comm_udp_recvfrom: FD 8 from
> 10.99.99.55:53

 An *IPv4* DNS packet is received.

 ... then Squid crashes.

 This indicates either a crash handling DNS packets, or somewhere
 unrelated and not logged.

 The weird thing is that earlier successful packets were received from
 the wildcard UDP listening address [::]. Yet the first sign of an
 IPv4-only UDP receive dies.

 Please try todays 3.2 snapshot tarball, if it can be replicated there
 please get a full debug trace (level ALL,9).
 Giving that a brief look may show the crash somewhere else. Then please
 follow the usual bug reporting procedure (checking the crash is not
 already known and reported, then reporting along with the trace).

> 2011/03/16 23:27:28.313 kid1| fd_open() FD 5
> /nosave/Squid_0/logs/cache.log
> 2011/03/16 23:27:28.313 kid1| Starting Squid Cache version 3.2.0.4
> for
> x86_64-unknown-linux-gnu...
> 2011/03/16 23:27:28.313 kid1| idnsInit: attempt open DNS socket to:
> [::]
> 2011/03/16 23:27:28.313 kid1| comm_open: FD 7 is a new socket
> 2011/03/16 23:27:28.314 kid1| fd_open() FD 7 DNS Socket IPv6

 Amos
Received on Mon Mar 21 2011 - 02:28:37 MDT