Hi,
How can I add auto linkUp trap in my code?
What I did is as following:
oid if_index_oid[] = {1,3,6,1,2,1,2,2,1,1,1};
oid link_up_oid[] = { 1,3,6,1,6,3,1,1,5, 4 };
oid snmptrap_oid[] = { 1,3,6,1,6,3,1,1,4, 1, 0 };
int i;
netsnmp_variable_list *linktrap_vars=NULL;
snmptrap_oid_len = ID_LENGTH(snmptrap_oid);
link_up_oid_len = ID_LENGTH(link_up_oid);
if_index_oid_len = ID_LENGTH(if_index_oid);
netsnmp_variable_list *linktrap_vars=NULL;
for (i=0; i<MAX; i++) { // MAX is the total number of interface
ret_linktrap_ifindex = i+1; // ret_linktrap_ifindex is
a global int
snmp_varlist_add_variable(&linktrap_vars,snmptrap_oid, snmptrap_oid_len,
ASNBJECT_ID, (u_char *) link_up_oid, link_up_oid_len * sizeof(oid));
snmp_varlist_add_variable(&linktrap_vars,if_index_oid, if_index_oid_len,
ASN_INTEGER,(u_char *)&ret_linktrap_ifindex, sizeof(ret_linktrap_ifindex));
send_v2trap(linktrap_vars);
snmp_free_varbind(linktrap_vars);
}
Am I right? unfortunately, it doesn't work, please help me , thanks!
Using Tomcat but need to do more? Need to support web services, security?
Get stuff done quickly with pre-integrated technology to make your job easier
Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo
Net-snmp-coders mailing list
Net-snmp-coders (AT) lists (DOT) sourceforge.net

22/08/06, Li Gan <li.gan (AT) mapleworks (DOT) comwrote:
How can I add auto linkUp trap in my code?

Which version of the agent are you using?
For recent releases, please see the snmpd.conf(5) man page, and the
description of the
"linkUpDownNotifications" directive.

What I did is as following:
[snip]
Am I right?

I haven't looked closely, but that looks pretty much right for sending
a linkUp trap.

unfortunately, it doesn't work, please help me , thanks!

The main thing that you haven't said is how you are triggering this code.
What decides when to send this trap?
What code have you written for monitoring the status of each interface?

Please note the FAQ entry:
How can I get the agent to generate a trap (or inform)?
(and particularly the second half of this entry).

Dave

Using Tomcat but need to do more? Need to support web services, security?
Get stuff done quickly with pre-integrated technology to make your job easier
Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo

Net-snmp-coders mailing list
Net-snmp-coders (AT) lists (DOT) sourceforge.net

22/08/06, Li Gan <li.gan (AT) mapleworks (DOT) comwrote:
But when the program running into the second interface,
by debugging, when arriving "snmp_varlist_add_variable", the program dumped.

Ah. I see a problem.
You're freeing the previous varbind list at the end of the loop, but
the linktrap_vars
variable is still pointing to this (now invalid) varbind structure.
So following this chain may well trigger a crash.

Try clearing the linktrap_vars variable immediately after freeing it.

Another question: for the second interface, the if_index_oid is
{1,3,6,1,2,1,2,2,1,1,1} or {1,3,6,1,2,1,2,2,1,1,2} ?
^^^ ^^^

It'll be 1.3.6.1.2.1.2.2.1.1.2 (assuming that the index is 2)

Dave

Using Tomcat but need to do more? Need to support web services, security?
Get stuff done quickly with pre-integrated technology to make your job easier
Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo

Net-snmp-coders mailing list
Net-snmp-coders (AT) lists (DOT) sourceforge.net

22/08/06, Li Gan <li.gan (AT) mapleworks (DOT) comwrote:
Another question about linkup trap, can I just use only 1 varbind list to
send all the interfaces generated linkup trap? I mean by using
"snmp_varlist_add_variable", bind all the interfaces into the same list one
by one.

Any trap *must* start with the varbinds listed in the MIB definition.
For linkUp, this means { ifIndex, ifAdminStatus, Status }

You can then append anything else you want to after this, but there's
no guarantee that the trap receiver will necessarily do anything with
them.

So yes - you *could* report several linkUp events in the same trap,
but you might find that the management system ignored everything bar
the first. It's probably safer to report them individually.

A lot depends on exactly what will be done with the traps when they arrive.

Dave

Using Tomcat but need to do more? Need to support web services, security?
Get stuff done quickly with pre-integrated technology to make your job easier
Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo

Net-snmp-coders mailing list
Net-snmp-coders (AT) lists (DOT) sourceforge.net

23/08/06, Li Gan <li.gan (AT) mapleworks (DOT) comwrote:
I am in root, snmpwalk and snmptrap
are all work fine, but if I type snmptrapd, the system told me "bash:
snmptrapd: command not found", how to deal with that?

What does
echo $PATH
display.

Are there something missed in my system?

The daemons (snmpd and snmptrapd) are often installed into 'sbin'
rather than 'bin'.
Now I'd expect this to be on a standard path for root (though not an
ordinary user).
How did you get to your root shell - logging in as root, or via 'su' ?

What /S is this? If Linux, then try "locate snmptrapd" to find
where the binary is.

Dave

Using Tomcat but need to do more? Need to support web services, security?
Get stuff done quickly with pre-integrated technology to make your job easier
Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo

Net-snmp-coders mailing list
Net-snmp-coders (AT) lists (DOT) sourceforge.net

23/08/06, Li Gan <li.gan (AT) mapleworks (DOT) comwrote:
For our embedded system, no .conf files are used, how can I set the ip
address of the trap receiver in the code? Thanks.

The easiest approach would probably be to hardcode a call to the
relevant config directive handler - passing in the appropriate text
string, as if it had been read from a config file.

Dave

Using Tomcat but need to do more? Need to support web services, security?
Get stuff done quickly with pre-integrated technology to make your job easier
Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo

Net-snmp-coders mailing list
Net-snmp-coders (AT) lists (DOT) sourceforge.net