/*
* snmpstatus.c - retrieves a fixed set of management information from
* a network entity.
*
*/
/***********************************************************************
Copyright 1988, 1989, 1991, 1992 by Carnegie Mellon University
All Rights Reserved
Permission to use, copy, modify, and distribute this software and its
documentation for any purpose and without fee is hereby granted,
provided that the above copyright notice appear in all copies and that
both that copyright notice and this permission notice appear in
supporting documentation, and that the name of CMU not be
used in advertising or publicity pertaining to distribution of the
software without specific, written prior permission.
CMU DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
CMU BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
SOFTWARE.
******************************************************************/
#include <net-snmp/net-snmp-config.h>
#if HAVE_STDLIB_H
#include <stdlib.h>
#endif
#if HAVE_UNISTD_H
#include <unistd.h>
#endif
#if HAVE_STRING_H
#include <string.h>
#else
#include <strings.h>
#endif
#include <sys/types.h>
#if HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif
#include <stdio.h>
#include <ctype.h>
#if TIME_WITH_SYS_TIME
# include <sys/time.h>
# include <time.h>
#else
# if HAVE_SYS_TIME_H
# include <sys/time.h>
# else
# include <time.h>
# endif
#endif
#if HAVE_SYS_SELECT_H
#include <sys/select.h>
#endif
#if HAVE_NETDB_H
#include <netdb.h>
#endif
#if HAVE_ARPA_INET_H
#include <arpa/inet.h>
#endif
#include <net-snmp/utilities.h>
#include <net-snmp/net-snmp-includes.h>
oid objid_sysDescr[] = { 1, 3, 6, 1, 2, 1, 1, 1, 0 };
size_t length_sysDescr = sizeof(objid_sysDescr) / sizeof(oid);
oid objid_sysUpTime[] = { 1, 3, 6, 1, 2, 1, 1, 3, 0 };
size_t length_sysUpTime = sizeof(objid_sysUpTime) / sizeof(oid);
oid objid_ifOperStatus[] = { 1, 3, 6, 1, 2, 1, 2, 2, 1, 8 };
size_t length_ifOperStatus =
sizeof(objid_ifOperStatus) / sizeof(oid);
oid objid_ifInUCastPkts[] = { 1, 3, 6, 1, 2, 1, 2, 2, 1, 11 };
size_t length_ifInUCastPkts =
sizeof(objid_ifInUCastPkts) / sizeof(oid);
oid objid_ifInNUCastPkts[] = { 1, 3, 6, 1, 2, 1, 2, 2, 1, 12 };
size_t length_ifInNUCastPkts =
sizeof(objid_ifInNUCastPkts) / sizeof(oid);
oid objid_ifOutUCastPkts[] = { 1, 3, 6, 1, 2, 1, 2, 2, 1, 17 };
size_t length_ifOutUCastPkts =
sizeof(objid_ifOutUCastPkts) / sizeof(oid);
oid objid_ifOutNUCastPkts[] =
{ 1, 3, 6, 1, 2, 1, 2, 2, 1, 18 };
size_t length_ifOutNUCastPkts =
sizeof(objid_ifOutNUCastPkts) / sizeof(oid);
oid objid_ipInReceives[] = { 1, 3, 6, 1, 2, 1, 4, 3, 0 };
size_t length_ipInReceives =
sizeof(objid_ipInReceives) / sizeof(oid);
oid objid_ipOutRequests[] = { 1, 3, 6, 1, 2, 1, 4, 10, 0 };
size_t length_ipOutRequests =
sizeof(objid_ipOutRequests) / sizeof(oid);
#define NETSNMP_DS_APP_DONT_FIX_PDUS 0
static void
optProc(int argc, char *const *argv, int opt)
{
switch (opt) {
case 'C':
while (*optarg) {
switch (*optarg++) {
case 'f':
netsnmp_ds_toggle_boolean(NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_APP_DONT_FIX_PDUS);
break;
default:
fprintf(stderr, "Unknown flag passed to -C: %c\n",
optarg[-1]);
exit(1);
}
}
break;
}
}
void
usage(void)
{
fprintf(stderr, "USAGE: snmpstatus ");
snmp_parse_args_usage(stderr);
fprintf(stderr, "\n\n");
snmp_parse_args_descriptions(stderr);
fprintf(stderr,
" -C APPOPTS\t\tSet various application specific behaviours:\n");
fprintf(stderr,
"\t\t\t f: do not fix errors and retry the request\n");
}
int
main(int argc, char *argv[])
{
netsnmp_session session, *ss;
netsnmp_pdu *pdu, *response;
netsnmp_variable_list *vars;
netsnmp_transport *transport = NULL;
char *sysdescr = NULL;
u_long uptime = 0;
int status;
int ipin = 0, ipout = 0, ipackets = 0, opackets = 0;
int good_var;
int down_interfaces = 0;
char buf[40];
int interfaces;
int count;
int exitval = 1;
SOCK_STARTUP;
/*
* get the common command line arguments
*/
switch (snmp_parse_args(argc, argv, &session, "C:", &optProc)) {
case NETSNMP_PARSE_ARGS_ERROR:
goto out;
case NETSNMP_PARSE_ARGS_SUCCESS_EXIT:
exitval = 0;
goto out;
case NETSNMP_PARSE_ARGS_ERROR_USAGE:
usage();
goto out;
default:
break;
}
/*
* open an SNMP session
*/
ss = snmp_open(&session);
if (ss == NULL) {
/*
* diagnose snmp_open errors with the input netsnmp_session pointer
*/
snmp_sess_perror("snmpstatus", &session);
goto out;
}
/*
* create PDU for GET request and add object names to request
*/
pdu = snmp_pdu_create(SNMP_MSG_GET);
snmp_add_null_var(pdu, objid_sysDescr, length_sysDescr);
snmp_add_null_var(pdu, objid_sysUpTime, length_sysUpTime);
snmp_add_null_var(pdu, objid_ipInReceives, length_ipInReceives);
snmp_add_null_var(pdu, objid_ipOutRequests, length_ipOutRequests);
/*
* do the request
*/
retry:
status = snmp_synch_response(ss, pdu, &response);
if (status == STAT_SUCCESS) {
if (response->errstat == SNMP_ERR_NOERROR) {
for (vars = response->variables; vars;
vars = vars->next_variable) {
if (vars->name_length == length_sysDescr
&& !memcmp(objid_sysDescr, vars->name,
sizeof(objid_sysDescr))) {
sysdescr = (char *) malloc(vars->val_len + 1);
memcpy(sysdescr, vars->val.string, vars->val_len);
sysdescr[vars->val_len] = '\0';
}
if (vars->name_length == length_sysUpTime &&
!memcmp(objid_sysUpTime, vars->name,
sizeof(objid_sysUpTime)) &&
vars->val.integer) {
uptime = *vars->val.integer;
}
if (vars->name_length == length_ipInReceives &&
!memcmp(objid_ipInReceives, vars->name,
sizeof(objid_ipInReceives)) &&
vars->val.integer) {
ipin = *vars->val.integer;
}
if (vars->name_length == length_ipOutRequests &&
!memcmp(objid_ipOutRequests, vars->name,
sizeof(objid_ipOutRequests)) &&
vars->val.integer) {
ipout = *vars->val.integer;
}
}
} else {
fprintf(stderr, "Error in packet.\nReason: %s\n",
snmp_errstring(response->errstat));
if (response->errindex != 0) {
fprintf(stderr, "Failed object: ");
for (count = 1, vars = response->variables;
vars && count != response->errindex;
vars = vars->next_variable, count++);
if (vars)
fprint_objid(stderr, vars->name, vars->name_length);
fprintf(stderr, "\n");
}
/*
* retry if the errored variable was successfully removed
*/
if (!netsnmp_ds_get_boolean(NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_APP_DONT_FIX_PDUS)) {
pdu = snmp_fix_pdu(response, SNMP_MSG_GET);
snmp_free_pdu(response);
response = NULL;
if (pdu != NULL)
goto retry;
}
}
} else if (status == STAT_TIMEOUT) {
fprintf(stderr, "Timeout: No Response from %s\n",
session.peername);
goto out;
} else { /* status == STAT_ERROR */
snmp_sess_perror("snmpstatus", ss);
exitval = 2;
goto out;
}
exitval = 0;
transport = snmp_sess_transport(snmp_sess_pointer(ss));
if (transport != NULL && transport->f_fmtaddr != NULL) {
char *addr_string = transport->f_fmtaddr(transport,
response->transport_data,
response->
transport_data_length);
if (addr_string != NULL) {
printf("[%s]=>[%s] Up: %s\n", addr_string, sysdescr,
uptime_string(uptime, buf));
free(addr_string);
}
} else {
printf("[<UNKNOWN>]=>[%s] Up: %s\n", sysdescr,
uptime_string(uptime, buf));
}
if (response)
snmp_free_pdu(response);
/*
* create PDU for GET request and add object names to request
*/
pdu = snmp_pdu_create(SNMP_MSG_GETNEXT);
snmp_add_null_var(pdu, objid_ifOperStatus, length_ifOperStatus);
snmp_add_null_var(pdu, objid_ifInUCastPkts, length_ifInUCastPkts);
snmp_add_null_var(pdu, objid_ifInNUCastPkts, length_ifInNUCastPkts);
snmp_add_null_var(pdu, objid_ifOutUCastPkts, length_ifOutUCastPkts);
snmp_add_null_var(pdu, objid_ifOutNUCastPkts, length_ifOutNUCastPkts);
/*
* ?? note: this code is not quite complete
*/
good_var = 5;
interfaces = 0;
while (good_var == 5) {
good_var = 0;
status = snmp_synch_response(ss, pdu, &response);
if (status == STAT_SUCCESS) {
if (response->errstat == SNMP_ERR_NOERROR) {
pdu = snmp_pdu_create(SNMP_MSG_GETNEXT);
for (vars = response->variables; vars;
vars = vars->next_variable) {
if ((vars->type & 0xF0) == 0x80) {
print_variable(vars->name, vars->name_length, vars);
continue;
}
if (vars->name_length >= length_ifOperStatus
&& !memcmp(objid_ifOperStatus, vars->name,
sizeof(objid_ifOperStatus))
&& vars->type == ASN_INTEGER
&& vars->val.integer) {
if (*vars->val.integer != MIB_IFSTATUS_UP)
down_interfaces++;
snmp_add_null_var(pdu, vars->name,
vars->name_length);
good_var++;
} else if (vars->name_length >= length_ifInUCastPkts
&&!memcmp(objid_ifInUCastPkts, vars->name,
sizeof(objid_ifInUCastPkts))
&& vars->type == ASN_COUNTER
&& vars->val.integer) {
ipackets += *vars->val.integer;
snmp_add_null_var(pdu, vars->name,
vars->name_length);
good_var++;
} else if (vars->name_length >= length_ifInNUCastPkts
&& !memcmp(objid_ifInNUCastPkts, vars->name,
sizeof(objid_ifInNUCastPkts))
&& vars->type == ASN_COUNTER
&& vars->val.integer) {
ipackets += *vars->val.integer;
snmp_add_null_var(pdu, vars->name,
vars->name_length);
good_var++;
} else if (vars->name_length >= length_ifOutUCastPkts
&& !memcmp(objid_ifOutUCastPkts, vars->name,
sizeof(objid_ifOutUCastPkts))
&& vars->type == ASN_COUNTER
&& vars->val.integer) {
opackets += *vars->val.integer;
snmp_add_null_var(pdu, vars->name,
vars->name_length);
good_var++;
} else if (vars->name_length >= length_ifOutNUCastPkts
&& !memcmp(objid_ifOutNUCastPkts,
vars->name,
sizeof(objid_ifOutNUCastPkts))
&& vars->type == ASN_COUNTER
&& vars->val.integer) {
opackets += *vars->val.integer;
snmp_add_null_var(pdu, vars->name,
vars->name_length);
good_var++;
}
}
if (good_var == 5)
interfaces++;
} else {
fprintf(stderr, "Error in packet.\nReason: %s\n",
snmp_errstring(response->errstat));
if (response->errindex != 0) {
fprintf(stderr, "Failed object: ");
for (count = 1, vars = response->variables;
vars && count != response->errindex;
vars = vars->next_variable, count++);
if (vars)
fprint_objid(stderr, vars->name,
vars->name_length);
fprintf(stderr, "\n");
}
exitval = 2;
}
} else if (status == STAT_TIMEOUT) {
fprintf(stderr, "Timeout: No Response from %s\n",
session.peername);
exitval = 1;
} else { /* status == STAT_ERROR */
snmp_sess_perror("snmpstatus", ss);
exitval = 1;
}
if (response)
snmp_free_pdu(response);
}
printf("Interfaces: %d, Recv/Trans packets: %d/%d | IP: %d/%d\n",
interfaces, ipackets, opackets, ipin, ipout);
if (down_interfaces > 0) {
printf("%d interface%s down!\n",
down_interfaces, down_interfaces > 1 ? "s are" : " is");
}
snmp_close(ss);
out:
SOCK_CLEANUP;
return exitval;
}