Difference between revisions of "Template:FAQ:Coding 11"
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used by <CODE>snmptrapd</CODE> to log incoming traps.  | used by <CODE>snmptrapd</CODE> to log incoming traps.  | ||
| − | The basic iterator handler is used in   | + | The basic iterator handler is used in    | 
| − | + | the TCP and UDP table implementations (<CODE>mibII/tcpTable &  | |
mibII/udpTable</CODE>), VACM context handling (<CODE>mibII/vacm_context</CODE>) and  | mibII/udpTable</CODE>), VACM context handling (<CODE>mibII/vacm_context</CODE>) and  | ||
various tables relating to agent internals (<CODE>agent/*</CODE>).  | various tables relating to agent internals (<CODE>agent/*</CODE>).  | ||
| Line 29: | Line 29: | ||
contrast between the iterator and iterator_access helpers.  | contrast between the iterator and iterator_access helpers.  | ||
| − | There are   | + | There are several examples based on the  | 
MfD framework (see <CODE>{if,ip,tcp,udp}-mib/</CODE>).  Much of this  | MfD framework (see <CODE>{if,ip,tcp,udp}-mib/</CODE>).  Much of this  | ||
code is not intended to be viewed directly, but individual files  | code is not intended to be viewed directly, but individual files  | ||
Latest revision as of 19:45, 20 July 2009
Many of the MIB modules shipped with the Net-SNMP agent still
use the v4 "traditional" MIB module API, but an increasing number
use one of the newer v5 helper-based handlers.  All of these can
be found under agent/mibgroup
The tdata helper is used in the new DisMan Event,
Expression and Schedule MIB modules
(see disman/{event,expr,schedule}/*).
The similar dataset helper is used in the older DisMan Event
MIB implementation (see disman/mteEvent*)
and the Notification Log MIB (see notification-log-mib/*),
used by snmptrapd to log incoming traps.
The basic iterator handler is used in 
the TCP and UDP table implementations (mibII/tcpTable &
mibII/udpTable), VACM context handling (mibII/vacm_context) and
various tables relating to agent internals (agent/*).
These show
a number of different approaches to using the iterator helper, so
it's worth comparing them.
The two examples/netSnmpHostsTable* modules provide a
contrast between the iterator and iterator_access helpers.
There are several examples based on the
MfD framework (see {if,ip,tcp,udp}-mib/).  Much of this
code is not intended to be viewed directly, but individual files
are clearly commented to distinguish between internal implementation
and public code.
The Net-SNMP agent does not currently include any MIB modules
using the array-user container-based helper.  The best examples
of this are to be found in the net-policy project.
See http://net-policy.sourceforge.net/