#include <net-snmp/net-snmp-config.h>
#include <net-snmp/net-snmp-includes.h>
#include <string.h>

int main(int argc, char ** argv)
{
	struct snmp_session session;
	struct snmp_session *sess_handle;
	struct snmp_pdu *pdu;
	struct snmp_pdu *response;
	struct variable_list *vars;

	oid id_oid[MAX_OID_LEN];
	oid serial_oid[MAX_OID_LEN];

	size_t id_len = MAX_OID_LEN;
	size_t serial_len = MAX_OID_LEN;

	int status;

	struct tree *mib_tree;



	init_snmp("APC Check");

	snmp_sess_init(&session);
	session.version = SNMP_VERSION_1;
	session.community = "public";
	session.community_len = strlen(session.community);
	session.peername = "127.0.0.1";
	sess_handle = snmp_open(&session);

	add_mibdir(".");
	mib_tree = read_mib("SNMPv2-MIB");

	pdu = snmp_pdu_create(SNMP_MSG_GET);

	read_objid("SNMPv2-MIB::sysDescr.0", id_oid, &id_len);
	snmp_add_null_var(pdu, id_oid, id_len);

	status = snmp_synch_response(sess_handle, pdu, &response);

	for(vars = response->variables; vars; vars = vars->next_variable)
	{
		print_value(vars->name, vars->name_length, vars);
	}

	snmp_free_pdu(response);
	snmp_close(sess_handle);

	return (0);
}



# root@supertank:~# gcc -o snmp_get snmp_get.c $(net-snmp-config --cflags) $(net-snmp-config --libs) $(net-snmp-config --external-libs)
root@supertank:~# ./snmp_get
STRING: Linux supertank 3.16.0-4-amd64 #1 SMP Debian 3.16.43-2 (2017-04-30) x86_64

# root@supertank:/etc/snmp# snmpget -mALL -v1 -cpublic 127.0.0.1 sysDescr.0
SNMPv2-MIB::sysDescr.0 = STRING: Linux supertank 3.16.0-4-amd64 #1 SMP Debian 3.16.43-2 (2017-04-30) x86_64