FAQ:Coding 11

Where should I put the files produced by 'mib2c'?

If you're using the main source tree to compile your new module, then put these two files (mymib.[ch]) in the directory 'agent/mibgroup'. You should then re-run configure to add in your new module

              configure --with-mib-modules=mymib

and recompile.

If you've got a number of new modules to add, it might be sensible to put them all into a single subdirectory of 'mibgroup'. Then create a header file, listing the individual components. This might look something like:

               config_require(mymib/myObjects)
               config_require(mymib/myTable)
               config_require(mymib/myOtherTable)

If this was saved as the file 'mymib.h', then the same configure line given above, would pull in all three modules. See the current contents of 'agent/mibgroup' for examples of this. Note that the MfD framework will generate a similar grouping automatically.

   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?