Setting snmpd DSCP/DiffServ values via setsockopt()

[Bob O. <bo...@ci...>]

I need to set the DSCP (DiffServ) values for all traffic between snmpd and
an external SNMP manager to a particular DSCP value.

 

I am currently doing this in my own application using the setsockopt() API
using the IPROTO_IP argument.

 

Where would I add this code to the Net-SNMP code base so that for the UDP
traffic between SNMP manager and snmpd has the proper DiffServ markings?

 

This would be for UDP and IPv4.

 

Is there a build configuration option when building Net-SNMP from source to
do this?

 

Assuming I wanted the value of the DSCP marking to be a soft coded, so I
could provide it say as a command line argument or perhaps as a soft setting
in the etc/sysconfig file, 

how might this be accomplished?