FAQ:Coding 19

How can I get the agent to send an SNMPv3 trap (or inform)?

It doesn't matter which API call you use to specify the trap - 'send_easy_trap()', 'send_v2trap()' or one of the other calls mentioned above. Generating an SNMPv3 notification (rather than a community-based one) is controlled by the snmpd.conf file.

To send an SNMPv3 trap, this file should contain a 'snmpsess' directive, specifying the version, security level, user name and passphrases (if applicable), as well as the destination address. This is basically the same as the command line required for sending the trap manually, using 'snmptrap'.

Note that (unlike 'snmptrap') this directive does not read default settings from an 'snmp.conf' file, so these must be specified explicitly in the 'snmpsess' line.

   FAQ:Coding
   

1. How do I write C code to integrate with the agent?
2. How does the agent fetch the value of a MIB variable from the system?
3. Mib2c complains about a missing "mib reference" - what does this mean?
4. Mib2c complains about not having a "valid OID" - what does this mean?
5. Why doesn't mib2c like the MIB file I'm giving it?
6. Mib2c ignores my MIB and generates a pair of 'mib-2' code files. Why?
7. What's the difference between the various mib2c configuration files?
8. Which mib2c configuration file should I use?
9. How can I have mib2c generate code for both scalars and tables?
10. Are there any examples, or documentation for generating MIB modules?
11. Where should I put the files produced by 'mib2c'?
12. Why doesn't my new MIB module report anything?
13. Why does the iterator call my get_{first,next} routines so often?
14. How can I get the agent to generate a trap (or inform)?
15. How can I get an AgentX sub-agent to generate a trap (or inform)?
16. How can I get the agent to send an SNMPv1 (or SNMPv2c) trap?
17. How can I get the agent to include varbinds with an SNMPv1 trap?
18. How can I get the agent to send an SNMPv1 enterprise-specific trap?
19. How can I get the agent to send an SNMPv3 trap (or inform)?
20. Why does calling 'send_v2trap' generate an SNMPv1 trap (or vice versa)?
21. How can I register a MIB module in a different (SNMPv3) context?