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// Compile : gcc `net-snmp-config --cflags` `net-snmp-config --libs` `net-snmp-config --external-libs` snmp_walk.c -o snmp_walk
#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 ifDescr_oid[MAX_OID_LEN];
oid ifInOctets_oid[MAX_OID_LEN];
size_t ifDescr_len = MAX_OID_LEN;
size_t ifInOctets_len = MAX_OID_LEN;
int status;
struct tree * mib_tree;
/*********************/
if(argv[1] == NULL){
printf("Please supply a hostname\n");
exit(1);
}
init_snmp("APC Check");
snmp_sess_init( &session );
session.version = SNMP_VERSION_1;
session.community = "public";
session.community_len = strlen(session.community);
session.peername = argv[1];
sess_handle = snmp_open(&session);
add_mibdir(".");
// mib_tree = read_mib("PowerNet-MIB.txt");
pdu = snmp_pdu_create(SNMP_MSG_GET);
read_objid("IF-MIB:ifDescr.3", ifDescr_oid, &ifDescr_len);
snmp_add_null_var(pdu, ifDescr_oid, ifDescr_len);
read_objid("IF-MIB:ifInOctets.3", ifInOctets_oid, &ifInOctets_len);
snmp_add_null_var(pdu, ifInOctets_oid, ifInOctets_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);
}