Re: Legacy code. Can send V1 traps. V2 traps result in "Invalid

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Thanks Dave, that worked. Appreciate your help.

Kapil

Dave Shield <D.T.Shield@csc.liv.ac.uk> wrote: On 09/01/07, Kapil Sharma wrote:
> The only other way I can think of is using netsnmp_variable_list instead of
> netsnmp_pdu and calling snmp_varlist_add_var() instead of
> snmp_pdu_add_variable(). Do you think that would work?

No.
It's not *how* you're adding the varbinds that's wrong for SNMPv2.
It's *which* varbinds you're adding.

If you are constructing the PDU by hand, then the very first two varbinds
*must* be sysUpTime.0, followed by snmpTrapOID.0, followed by your
original SNMPv1 varbind list.
See RFC 3584 for how this compares to SNMPv1 traps.



> I am not sure if I can simply call the function send_v2trap() to send the
> notification, because how would the function know the target address?

send_v2trap() will use the snmpd.conf settings (trapsink, trap2sink, etc)
to determine where to direct notifications.


Dave



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Thanks Dave, that worked. Appreciate your help.<br><br>Kapil<br><br><b><i>Dave Shield &lt;D.T.Shield@csc.liv.ac.uk&gt;</i></b> wrote:<blockquote class="replbq" style="border-left: 2px solid rgb(16, 16, 255); margin-left: 5px; padding-left: 5px;"> On 09/01/07, Kapil Sharma <kapilsharmax@yahoo.com> wrote:<br>&gt; The only other way I can think of is using netsnmp_variable_list instead of<br>&gt; netsnmp_pdu and calling snmp_varlist_add_var() instead of<br>&gt; snmp_pdu_add_variable(). Do you think that would work?<br><br>No.<br>It's not *how* you're adding the varbinds that's wrong for SNMPv2.<br>It's *which* varbinds you're adding.<br><br>If you are constructing the PDU by hand, then the very first two varbinds<br>*must* be sysUpTime.0, followed by snmpTrapOID.0, followed by your<br>original SNMPv1 varbind list.<br> See RFC 3584 for how this compares to SNMPv1 traps.<br><br><br><br>&gt; I am not sure if I can simply call the function send_v2trap() to send the<br>&gt;
notification, because how would the function know the target address?<br><br>send_v2trap() will use the snmpd.conf settings (trapsink, trap2sink, etc)<br>to determine where to direct notifications.<br><br><br>Dave<br></kapilsharmax@yahoo.com></blockquote><br><p>

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