[ net-snmp-Bugs-1801793 ] 5.4.1 Win32 agentx subagent fails with "localhost:705"

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Bugs item #1801793, was opened at 2007-09-25 08:11
Message generated for change (Comment added) made by magfr
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Category: library
>Group: None
>Status: Closed
Resolution: None
Priority: 5
Private: No
Submitted By: Nobody/Anonymous (nobody)
>Assigned to: Magnus Fromreide (magfr)
Summary: 5.4.1 Win32 agentx subagent fails with "localhost:705"

Initial Comment:
Agentx subagents built with 5.4.1-win32 release libraries fail on start with the following errors:

No support for any checked transport domain
Warning: failed to connect to the agentx master agent (localhost:705)

This happens also with the sample subagent code provided at http://net-snmp.sourceforge.net/wiki/index.php/TUT:Writing_a_Subagent

On versions 5.3.1 and before, agentx subagent works fine.

OS: WinXP Professional, SP2
Compiler: MS Visual Studio 2005
SNMP development libraries: 5.4.1-win32

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Comment By: Magnus Fromreide (magfr)
Date: 2007-09-30 23:01

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Thanks for the bug report!
We've fixed the problem in the 5.4.x code branch
and the main development tree, so it should be
fixed in future releases of the Net-SNMP package.

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Comment By: Magnus Fromreide (magfr)
Date: 2007-09-26 20:52

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The problem is that agentx uses unix as it's default transport domain, so
when we parses localhost:705 then that is interpreted as.

1. Try the localhost domain - fails, no such domain found
2. Try the default domain, in this case unix. There is no unix support so
it fails.

Now, what can be done about this is:

1. Change agentx_config.h to check if unix is a configured transport and
use tcp as default if it isn't.
2. Add some kind of fallback mechanism to the default handler selection?

Further, as a workaround geekindenial could add the line

defDomain agentx tcp

to some relevant config file, that would change the default domain for
agentx to tcp.

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Comment By: Vinh (geekindenial)
Date: 2007-09-26 02:22

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With master agent spec put back to "localhost:705" and those debug lines
added to
snmp.conf, this is what I got on the output
(note: also, as a side question, why do I have the
"netsnmp_assert x failed ..\..\agent\agent_registry.c:535" errors on
starting up the
subagent? This happens with 5.4.1 release, in both Windows and Linux, even
if the subagent does
nothing except for initialize agent, initialize snmp, and then shutdown.
Does it deserve a separate bug report?)

=============================================================
C:\Documents and
Settings\vnguy\Desktop\TEST-C\mysnmptest\debug>mytestsnmp.exe
netsnmp_assert x failed ..\..\agent\agent_registry.c:535
netsnmp_assert x failed ..\..\agent\agent_registry.c:535
netsnmp_assert x failed ..\..\agent\agent_registry.c:535
trace:  ..\..\snmplib\read_config.c, 795:
read_config: C:/Program Files/net-snmp/etc/snmp/snmp.conf:5 examining:
debugToke
ns tdomain
trace:  ..\..\snmplib\read_config.c, 498:
read_config: Found a parser.  Calling it: debugTokens / tdomain
registered debug token tdomain, 1
tdomain: tdomain_transport_full("agentx", "localhost:705", 0, "[NIL]",
"[NIL]")
tdomain: Found no domain from specifier "localhost"
tdomain: Use application default domain "unix"
tdomain: Found no domain from specifier "unix"
No support for any checked transport domain
Warning: Failed to connect to the agentx master agent (localhost:705):
tdomain: tdomain_transport_full("agentx", "localhost:705", 0, "[NIL]",
"[NIL]")
tdomain: Found no domain from specifier "localhost"
tdomain: Use application default domain "unix"
tdomain: Found no domain from specifier "unix"
No support for any checked transport domain
Warning: Failed to connect to the agentx master agent (localhost:705):
=============================================================

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Comment By: Thomas Anders (tanders)
Date: 2007-09-25 10:52

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Yes, please -- with the original "localhost:705" configuration.
Again, please also post the snmpd.conf content.

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Comment By: Nobody/Anonymous (nobody)
Date: 2007-09-25 10:35

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Yes "tcp:localhost:705" works
Would you still want me to add those lines to snmp.conf and get the debug
output?

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Comment By: Thomas Anders (tanders)
Date: 2007-09-25 09:54

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Moved to bugs.

What's the content of snmpd.conf for the master agent?
Can you please try specifying "tcp:localhost:705" instead?
Can you please add
  doDebugging 1
  debugTokens tdomain
to your snmp.conf (*not* snmpd.conf!) so that we can get debugging output
for the subagent?

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