Hiya
I’ve configured spamc to
use a host that resolves to 2 addresses, and I’m seeing something odd
when the spamd server at the first address isn’t
running.
I twiddled with libspamc.c and
defined DO_CONNECT_DEBUG_SYSLOGS, and have recorded the following:
Aug 20 18:24:16 horus2 spamc[3026]:
dbg: 2 [0 28220040: -62.70.94.7][4: -62.70.94.7] [1
28220048: -62.70.94.2][4: -62.70.94.2]
Aug 20 18:24:16 horus2 spamc[3026]:
dbg: host addr 0/2 =
75e46c2 at bfbfd600
Aug 20 18:24:16 horus2 spamc[3026]:
dbg: host addr 1/2 =
25e46c2 at bfbfd604
Aug 20 18:24:16 horus2 spamc[3026]:
dbg: socket
Aug 20 18:24:16 horus2 spamc[3026]:
dbg: connect() to spamd 0
Aug 20 18:24:16 horus2 spamc[3026]:
dbg: cpy addr 0/2 at bfbfd600
Aug 20 18:24:16 horus2 spamc[3026]:
dbg: conn addr 0/2 = 75e46c2
Aug 20 18:24:16 horus2 spamc[3026]:
dbg: connect() to spamd at
194.70.94.7
Aug 20 18:24:16 horus2 spamc[3026]:
dbg: connect() to spamd at
194.70.94.7 done
Aug 20 18:24:16 horus2 spamc[3026]:
connect() to spamd at 194.70.94.7 failed, retrying
(1/3): Connection refused
Aug 20 18:24:17 horus2 spamc[3026]:
dbg: connect() to spamd 1
Aug 20 18:24:17 horus2 spamc[3026]:
dbg: cpy addr 1/2 at bfbfd604
Aug 20 18:24:17 horus2 spamc[3026]:
dbg: conn addr 1/2 = 25e46c2
Aug 20 18:24:17 horus2 spamc[3026]:
dbg: connect() to spamd at
194.70.94.2
Aug 20 18:24:17 horus2 spamc[3026]:
dbg: connect() to spamd at
194.70.94.2 done
Aug 20 18:24:17 horus2 spamc[3026]:
connect() to spamd at 194.70.94.2 failed, retrying
(2/3): Invalid argument
Aug 20 18:24:18 horus2 spamc[3026]:
dbg: connect() to spamd 2
Aug 20 18:24:18 horus2 spamc[3026]:
dbg: cpy addr 0/2 at bfbfd600
Aug 20 18:24:18 horus2 spamc[3026]:
dbg: conn addr 0/2 = 75e46c2
Aug 20 18:24:18 horus2 spamc[3026]:
dbg: connect() to spamd at
194.70.94.7
Aug 20 18:24:18 horus2 spamc[3026]:
dbg: connect() to spamd at
194.70.94.7 done
Aug 20 18:24:18 horus2 spamc[3026]:
connect() to spamd at 194.70.94.7 failed, retrying
(3/3): Invalid argument
In this case, spamc attempts to
connect to the first address, is refused (as is expected) – but any subsequent
connect() attempts result in a complaint about an
invalid argument.
Additionally, (and I’m not sure why) – the first
debug line correctly lists the last 3 octets of the IP addresses that are in
the hostname, but the first octet reads -62 instead of 194. Could this be
indicative of some useless gunk being passed to connect(),
or is it harmless? I suspect it’s harmless, as spamc
is able to successfully connect to a spamd server if one
responds on the first connect() attempt.
Can anyone shed any light onto what might be happening?
Steven Fletcher
Internal Support Technician
dabs.com plc
www.dabs.com
Tel: +44 (0)870 429 3488
Fax: +44 (0)870 429 7488
Mobile: +44 (0)781 258 4132
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