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