Hi,
snmpd terminates on SIGHUP used to force reloading the
configuration in case of pass directives is used with non
default priorities (details see P.S.).
I'll seeking for pointers from you (the Net-SNMP community)
on how the intended way of a fix may look like before I
start implementing a patch. In favour of a hackish quick&dirty
fix I'll prefer doing it in a way which has reasonable chances
to be accepted by the Net-SNMP community.
Problem Overview:
The reason for the termination lies in the fact that the pass
module allows to specify the priority which is only taken into
account at registration time (in pass_parse_config) but not at
de-registration time (in pass_free_config) which will result
in a duplicate registration resulting in snmpd being terminated.
A quick test showed that passing a priority of 255 at
de-registration time (using unregister_mib_priority)
workarounds the termination.
What needs be fixed somehow:
I'm looking for a way to reach the priorities of all pass
directives from the ``pass_free_config`` hook. The ``passthrus``
(a global) currently does not contain the priority.
Some initial ideas:
a) extend the ``extensible`` struct with a priority: not
sure if this in line with initial intention of
``extensible``; feels bad, as possibly to intrusive
b) add new ``extensible_prio`` struct containing
``extensible`` by value plus a priority: local, not
affecting Net-SNMP internals and other modules
Grégoire Weber
P.S.: Additional Details:
Net-SNMP-Version:
5.7.1 (the asymmetriy exists since Fri Apr 29 15:56:13 2005 +0000
Rev 6f5fa7631f4f53b705d386f10926b5932f9e746a)
Log:
NET-SNMP version 5.7.1 restarted
register_mib: unregistering iso.3.6.1.4.1.6368.3.4.1.1.1
register_mib: unload(iso.3.6.1.4.1.6368.3.4.1.1.1, [NIL])
Turning on AgentX master support.
register_mib: registering "pass" at iso.3.6.1.4.1.6368.3.4.1.1.1 with context
""
duplicate registration: MIB modules pass and pass (oid
.1.3.6.1.4.1.6368.3.4.1.1.1).
Pass directive in /etc/snmp/snmpd.conf:
pass -p 255 .1.3.6.1.4.1.6368.3.4.1.1.1 /opt/sz/bin/snmp-maintenance-status
File:
agent/mibgroup/ucd-snmp/pass.c
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