Three snmpd extensions in ucd-snmp (1)

The advantages of the Protocol SNMP protocol for network management allow many people to use it. Now let's explain the source code parsing of snmpd extensions in the ucd-snmp tool. This article involves three snmpd extension methods. Then we will explain them separately. First, let's give a brief introduction to the snmpd command. For those who often access this command, we all know that the snmpd command is a daemon process that responds to SNMP requests. The standard syntax format is:

snmpd [OPTIONS] [LISTENING ADDRESSES]

The syntax format is snmpd followed by an option or listening address.

Snmpd Extension Method 1: static link form

First, generate two files, ustScalarSet. h and ustScalarSet. c. Copy it to the agent/mibgroup subdirectory under the downloaded ucd-snmp source code directory. for example, on my machine, the source code of ucd-snmp 4.2.1 is in the/usr/local/src/ucd-snmp-4.2.1, the target directory of the corresponding copy is, /usr/local/src/ucd-snmp-4.2.1/agent/mibgroup.

In the home directory of ucd-snmp 4.2.1 (my machine is/usr/local/src/ucd-snmp-4.2.1), run the command in the following sequence

# ./configure -with-mib-modules="ustScalarSet"# make# make install

In this way, the new agent generates and installs. Runs the SNMP agent.

# /usr/local/sbin/snmpd

You can use any of the following commands to retrieve the newly added MIB variables using the corresponding tool program:

% /usr/local/bin/snmpget localhost public UCD-SNMP-TUTORIAL-MIB::ustSSSimpleString.0% /usr/local/bin/snmpwalk localhost public UCD-SNMP-TUTORIAL-MIB::ustScalarSet