Setting Type of Service/DSCP fields for SNMP Messages

I need to set the Type of Service or the Differentiated Services Code Point
(DSCP) values (Quality of Service (QoS)) value for all messages between the
net-snmp agent and a SNMP system manager.

 

I am able to accomplish this under Linux using the setsockopt() for my
custom application, but need to be able to customize DSCP for net-snmp.  

 

Does anyone have any ideas on how to most efficiently do this with net-snmp.
Assuming that the source code would need to be modified,  would it be a
simple one line change somewhere?

 

 

    // Returns 0 on success, -1 for errors

    int iRet = setsockopt(socketDescriptor,       // Socket descriptor

                          IPPROTO_IP,             // Socket level

                          IP_TOS,                 // Socket option (type of
service)

                          (char *)&DSCPValue,     // Option value buffer

                          sizeof(DSCPValue));     // Size of field

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