windows下使用net-snmp实现agent扩展（一）
#include <net-snmp/net-snmp-config.h>
#include <net-snmp/net-snmp-includes.h>
#include <net-snmp/agent/net-snmp-agent-includes.h>
#include <signal.h>
#include "nstAgentSubagentObject.h"
static int keep_running;
RETSIGTYPE
stop_server(int a) {
keep_running = 0;
}
int main (int argc, char **argv) {
//int agentx_subagent=1; /* change this if you want to be a SNMP master agent */
int agentx_subagent=0;
int background = 0; /* change this if you want to run in the background */
int syslog = 0; /* change this if you want to use syslog */
/* print log errors to syslog or stderr */
if (syslog)
;
//snmp_enable_calllog();
else
snmp_enable_stderrlog();
/* we're an agentx subagent? */
if (agentx_subagent) {
/* make us a agentx client. */
netsnmp_ds_set_boolean(NETSNMP_DS_APPLICATION_ID, NETSNMP_DS_AGENT_ROLE, 1);
}
/* run in background, if requested */
if (background && netsnmp_daemonize(1, !syslog))
exit(1);
/* initialize tcpip, if necessary */
SOCK_STARTUP;
/* initialize the agent library */
init_agent("example-demon");
/* initialize mib code here */
/* mib code: init_nstAgentSubagentObject from nstAgentSubagentObject.C */
init_nstAgentSubagentObject();
/* initialize vacm/usm access control */
if (!agentx_subagent) {
init_vacm_vars();
init_usmUser();
}
/* example-demon will be used to read example-demon.conf files. */
/*在这里读取一个example-demon.conf的配置文件，这是关键*/
init_snmp("example-demon");
/* If we're going to be a snmp master agent, initial the ports */
if (!agentx_subagent)
init_master_agent(); /* open the port to listen on (defaults to udp:161) */
/* In case we recevie a request to stop (kill -TERM or kill -INT) */
keep_running = 1;
signal(SIGTERM, stop_server);
signal(SIGINT, stop_server);
snmp_log(LOG_INFO,"example-demon is up and running.\n");
/* your main loop here... */
while(keep_running) {
/* if you use select(), see snmp_select_info() in snmp_api(3) */
/* --- OR --- */
agent_check_and_process(1); /* 0 == don't block */
}
/* at shutdown time */
snmp_shutdown("example-demon");
SOCK_CLEANUP;
return 0;
}
nstAgentSubagentObject.h
/* * Note: this file originally auto-generated by mib2c using * : mib2c.int_watch.conf,v 5.0 2002/04/20 07:30:13 hardaker Exp $ */ #ifndef NSTAGENTSUBAGENTOBJECT_H #define NSTAGENTSUBAGENTOBJECT_H /* * function declarations */ void init_nstAgentSubagentObject(void); #endif /* NSTAGENTSUBAGENTOBJECT_H */
nstAgentSubagentObject.c
/*
* Note: this file originally auto-generated by mib2c using
* : mib2c.int_watch.conf,v 5.0 2002/04/20 07:30:13 hardaker Exp $
*/
#include <net-snmp/net-snmp-config.h>
#include <net-snmp/net-snmp-includes.h>
#include <net-snmp/agent/net-snmp-agent-includes.h>
#include "nstAgentSubagentObject.h"
/*
* the variable we want to tie an OID to. The agent will handle all
* * GET and SET requests to this variable changing it's value as needed.
*/
static int nstAgentSubagentObject = 6;
/*
* our initialization routine, automatically called by the agent
* (to get called, the function name must match init_FILENAME())
*/
void
init_nstAgentSubagentObject(void)
{
static oid nstAgentSubagentObject_oid[] =
{ 1, 3, 6, 1, 4, 1, 8072, 2, 4, 1, 1, 2, 0 };
/*
* a debugging statement. Run the agent with -DnstAgentSubagentObject to see
* the output of this debugging statement.
*/
DEBUGMSGTL(("nstAgentSubagentObject",
"Initializing the nstAgentSubagentObject module\n"));
/*
* the line below registers our variables defined above as
* accessible and makes it writable. A read only version of any
* of these registration would merely call
* register_read_only_int_instance() instead. The functions
* called below should be consistent with your MIB, however.
*
* If we wanted a callback when the value was retrieved or set
* (even though the details of doing this are handled for you),
* you could change the NULL pointer below to a valid handler
* function.
*/
DEBUGMSGTL(("nstAgentSubagentObject",
"Initalizing nstAgentSubagentObject scalar integer. Default value = %d\n",
nstAgentSubagentObject));
netsnmp_register_int_instance("nstAgentSubagentObject",
nstAgentSubagentObject_oid,
OID_LENGTH(nstAgentSubagentObject_oid),
&nstAgentSubagentObject, NULL);
DEBUGMSGTL(("nstAgentSubagentObject",
"Done initalizing nstAgentSubagentObject module\n"));
}