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/*
* snmpget.c - send snmp GET requests to a network entity.
*
*/
/***********************************************************
Copyright 1988, 1989 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 <sys/types.h>
#include <netinet/in.h>
#include <stdio.h>
#ifdef linux
#include <stdlib.h>
#include <string.h>
#endif
#include "mib.h"
#include "snmp.h"
#include "snmp_impl.h"
#include "asn1.h"
#include "snmp_api.h"
#include "snmp_client.h"
#include "version.h"
extern int errno;
int snmp_dump_packet = 0;
static void
usage ()
{
fprintf (stderr, "usage: snmpget [opts] host community object-identifier [object-identifier ...]\n");
fprintf (stderr, "valid opts are:\n");
fprintf (stderr, " -p <port> - port to use; default port 161\n");
fprintf (stderr, " -T <timeout> - initial timeout in ms; default is %d ms\n",
(int) (SNMP_API_DEFAULT_TIMEOUT / 1000));
fprintf (stderr, " -R <retries> - # of retries; default is %d retries\n",
SNMP_API_DEFAULT_RETRIES);
exit (1);
}
int
main(argc, argv)
int argc;
char *argv[];
{
struct snmp_session session, *ss;
struct snmp_pdu *pdu, *response;
struct variable_list *vars;
int arg;
char *gateway = NULL;
char *community = NULL;
int count, current_name = 0;
char *names[128];
oid name[MAX_NAME_LEN];
int name_length;
int status;
int port_flag = 0;
int dest_port = 0;
int timo_flag = 0;
int timo_val = 0;
int retry_flag = 0;
int retry_val = 0;
init_mib();
/*
* usage: snmpget gateway-name community-name
*/
for(arg = 1; arg < argc; arg++){
if (argv[arg][0] == '-'){
switch(argv[arg][1]){
case 'V':
printf ("%s\n", CMU_VERSION);
exit (1);
break;
case 'd':
snmp_dump_packet++;
break;
case 'p':
port_flag = 1;
if (arg + 1 >= argc)
usage ();
dest_port = atoi(argv[++arg]);
break;
case 'T':
timo_flag = 1;
if (arg + 1 >= argc)
usage ();
timo_val = atoi(argv[++arg]);
break;
case 'R':
retry_flag = 1;
if (arg + 1 >= argc)
usage ();
retry_val = atoi(argv[++arg]);
break;
default:
printf("invalid option: -%c\n", argv[arg][1]);
usage ();
break;
}
continue;
}
if (gateway == NULL){
gateway = argv[arg];
} else if (community == NULL){
community = argv[arg];
} else {
names[current_name++] = argv[arg];
}
}
if (!(gateway && community && current_name > 0)){
usage ();
exit(1);
}
bzero((char *)&session, sizeof(struct snmp_session));
session.peername = gateway;
if (port_flag)
session.remote_port = dest_port;
session.community = (u_char *)community;
session.community_len = strlen((char *)community);
if (retry_flag) {
session.retries = retry_val;
} else {
session.retries = SNMP_DEFAULT_RETRIES;
}
if (timo_flag) {
session.timeout = timo_val * 1024;
} else {
session.timeout = SNMP_DEFAULT_TIMEOUT;
}
session.authenticator = NULL;
snmp_synch_setup(&session);
ss = snmp_open(&session);
if (ss == NULL){
printf("Couldn't open snmp\n");
exit(-1);
}
pdu = snmp_pdu_create(GET_REQ_MSG);
for(count = 0; count < current_name; count++){
name_length = MAX_NAME_LEN;
if (!read_objid(names[count], name, &name_length)){
printf("Invalid object identifier: %s\n", names[count]);
}
snmp_add_null_var(pdu, name, name_length);
}
retry:
status = snmp_synch_response(ss, pdu, &response);
if (status == STAT_SUCCESS){
if (response->errstat == SNMP_ERR_NOERROR){
if( response->command == REPORT_MSG )
printf( "This is an error report.\n" );
for(vars = response->variables; vars; vars = vars->next_variable)
print_variable(vars->name, vars->name_length, vars);
} else {
printf("Error in packet.\nReason: %s\n", snmp_errstring(response->errstat));
if (response->errstat == SNMP_ERR_NOSUCHNAME){
printf("This name doesn't exist: ");
for(count = 1, vars = response->variables; vars && count != response->errindex;
vars = vars->next_variable, count++)
;
if (vars)
print_objid(vars->name, vars->name_length);
printf("\n");
}
if ((pdu = snmp_fix_pdu(response, GET_REQ_MSG)) != NULL)
goto retry;
}
} else if (status == STAT_TIMEOUT){
printf("No Response from %s\n", gateway);
exit (1);
} else { /* status == STAT_ERROR */
printf("An error occurred, Quitting\n");
exit (1);
}
if (response)
snmp_free_pdu(response);
snmp_close(ss);
return 0;
}
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