/*
* Simple Network Management Protocol (RFC 1067).
*
*/
/**********************************************************************
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>
#include <ctype.h>
#ifdef KINETICS
#include "gw.h"
#include "ab.h"
#include "inet.h"
#include "fp4/cmdmacro.h"
#include "fp4/pbuf.h"
#include "glob.h"
#endif
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#ifdef HAVE_STRING_H
#include <string.h>
#else
#include <strings.h>
#endif
#if HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif
#ifdef HAVE_SYS_SELECT_H
#include <sys/select.h>
#endif
#ifndef NULL
#define NULL 0
#endif
#if HAVE_DMALLOC_H
#include <dmalloc.h>
#endif
#ifdef vms
#include <in.h>
#endif
#include <net-snmp/types.h>
#include <net-snmp/output_api.h>
#include <net-snmp/library/asn1.h>
#include <net-snmp/library/snmp.h> /* for "internal" definitions */
#include <net-snmp/library/snmp_api.h>
#include <net-snmp/library/mib.h>
/** @mainpage Net-SNMP Coding Documentation
* @section Introduction
This is the Net-SNMP coding and API reference documentation. It is
incomplete, but when combined with the manual page set and
tutorials forms a pretty comprehensive starting point.
@section Starting out
The best places to start learning are the @e Net-SNMP @e tutorial
(http://www.Net-SNMP.org/tutorial-5/) and the @e Modules and @e
Examples sections of this document.
*/
void
xdump(const void * data, size_t length, const char *prefix)
{
const u_char * const cp = (const u_char*)data;
int col, count;
char *buffer;
#ifndef NETSNMP_DISABLE_DYNAMIC_LOG_LEVEL
int debug_log_level = netsnmp_get_debug_log_level();
#else
#define debug_log_level LOG_DEBUG
#endif /* NETSNMP_DISABLE_DYNAMIC_LOG_LEVEL */
buffer = (char *) malloc(strlen(prefix) + 80);
if (!buffer) {
snmp_log(LOG_NOTICE,
"xdump: malloc failed. packet-dump skipped\n");
return;
}
count = 0;
while (count < (int) length) {
strcpy(buffer, prefix);
sprintf(buffer + strlen(buffer), "%.4d: ", count);
for (col = 0; ((count + col) < (int) length) && col < 16; col++) {
sprintf(buffer + strlen(buffer), "%02X ", cp[count + col]);
if (col % 4 == 3)
strcat(buffer, " ");
}
for (; col < 16; col++) { /* pad end of buffer with zeros */
strcat(buffer, " ");
if (col % 4 == 3)
strcat(buffer, " ");
}
strcat(buffer, " ");
for (col = 0; ((count + col) < (int) length) && col < 16; col++) {
buffer[col + 60] =
isprint(cp[count + col]) ? cp[count + col] : '.';
}
buffer[col + 60] = '\n';
buffer[col + 60 + 1] = 0;
snmp_log(debug_log_level, "%s", buffer);
count += col;
}
snmp_log(debug_log_level, "\n");
free(buffer);
} /* end xdump() */
/*
* u_char * snmp_parse_var_op(
* u_char *data IN - pointer to the start of object
* oid *var_name OUT - object id of variable
* int *var_name_len IN/OUT - length of variable name
* u_char *var_val_type OUT - type of variable (int or octet string) (one byte)
* int *var_val_len OUT - length of variable
* u_char **var_val OUT - pointer to ASN1 encoded value of variable
* int *listlength IN/OUT - number of valid bytes left in var_op_list
*/
u_char *
snmp_parse_var_op(u_char * data,
oid * var_name,
size_t * var_name_len,
u_char * var_val_type,
size_t * var_val_len,
u_char ** var_val, size_t * listlength)
{
u_char var_op_type;
size_t var_op_len = *listlength;
u_char *var_op_start = data;
data = asn_parse_sequence(data, &var_op_len, &var_op_type,
(ASN_SEQUENCE | ASN_CONSTRUCTOR), "var_op");
if (data == NULL) {
/*
* msg detail is set
*/
return NULL;
}
DEBUGDUMPHEADER("recv", "Name");
data =
asn_parse_objid(data, &var_op_len, &var_op_type, var_name,
var_name_len);
DEBUGINDENTLESS();
if (data == NULL) {
ERROR_MSG("No OID for variable");
return NULL;
}
if (var_op_type !=
(u_char) (ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_OBJECT_ID))
return NULL;
*var_val = data; /* save pointer to this object */
/*
* find out what type of object this is
*/
data = asn_parse_header(data, &var_op_len, var_val_type);
if (data == NULL) {
ERROR_MSG("No header for value");
return NULL;
}
/*
* XXX no check for type!
*/
*var_val_len = var_op_len;
data += var_op_len;
*listlength -= (int) (data - var_op_start);
return data;
}
/*
* u_char * snmp_build_var_op(
* u_char *data IN - pointer to the beginning of the output buffer
* oid *var_name IN - object id of variable
* int *var_name_len IN - length of object id
* u_char var_val_type IN - type of variable
* int var_val_len IN - length of variable
* u_char *var_val IN - value of variable
* int *listlength IN/OUT - number of valid bytes left in
* output buffer
*/
u_char *
snmp_build_var_op(u_char * data,
oid * var_name,
size_t * var_name_len,
u_char var_val_type,
size_t var_val_len,
u_char * var_val, size_t * listlength)
{
size_t dummyLen, headerLen;
u_char *dataPtr;
dummyLen = *listlength;
dataPtr = data;
#if 0
data = asn_build_sequence(data, &dummyLen,
(u_char) (ASN_SEQUENCE | ASN_CONSTRUCTOR),
0);
if (data == NULL) {
return NULL;
}
#endif
if (dummyLen < 4)
return NULL;
data += 4;
dummyLen -= 4;
headerLen = data - dataPtr;
*listlength -= headerLen;
DEBUGDUMPHEADER("send", "Name");
data = asn_build_objid(data, listlength,
(u_char) (ASN_UNIVERSAL | ASN_PRIMITIVE |
ASN_OBJECT_ID), var_name,
*var_name_len);
DEBUGINDENTLESS();
if (data == NULL) {
ERROR_MSG("Can't build OID for variable");
return NULL;
}
DEBUGDUMPHEADER("send", "Value");
switch (var_val_type) {
case ASN_INTEGER:
data = asn_build_int(data, listlength, var_val_type,
(long *) var_val, var_val_len);
break;
case ASN_GAUGE:
case ASN_COUNTER:
case ASN_TIMETICKS:
case ASN_UINTEGER:
data = asn_build_unsigned_int(data, listlength, var_val_type,
(u_long *) var_val, var_val_len);
break;
#ifdef NETSNMP_WITH_OPAQUE_SPECIAL_TYPES
case ASN_OPAQUE_COUNTER64:
case ASN_OPAQUE_U64:
#endif
case ASN_COUNTER64:
data = asn_build_unsigned_int64(data, listlength, var_val_type,
(struct counter64 *) var_val,
var_val_len);
break;
case ASN_OCTET_STR:
case ASN_IPADDRESS:
case ASN_OPAQUE:
case ASN_NSAP:
data = asn_build_string(data, listlength, var_val_type,
var_val, var_val_len);
break;
case ASN_OBJECT_ID:
data = asn_build_objid(data, listlength, var_val_type,
(oid *) var_val, var_val_len / sizeof(oid));
break;
case ASN_NULL:
data = asn_build_null(data, listlength, var_val_type);
break;
case ASN_BIT_STR:
data = asn_build_bitstring(data, listlength, var_val_type,
var_val, var_val_len);
break;
case SNMP_NOSUCHOBJECT:
case SNMP_NOSUCHINSTANCE:
case SNMP_ENDOFMIBVIEW:
data = asn_build_null(data, listlength, var_val_type);
break;
#ifdef NETSNMP_WITH_OPAQUE_SPECIAL_TYPES
case ASN_OPAQUE_FLOAT:
data = asn_build_float(data, listlength, var_val_type,
(float *) var_val, var_val_len);
break;
case ASN_OPAQUE_DOUBLE:
data = asn_build_double(data, listlength, var_val_type,
(double *) var_val, var_val_len);
break;
case ASN_OPAQUE_I64:
data = asn_build_signed_int64(data, listlength, var_val_type,
(struct counter64 *) var_val,
var_val_len);
break;
#endif /* NETSNMP_WITH_OPAQUE_SPECIAL_TYPES */
default:
{
char error_buf[64];
snprintf(error_buf, sizeof(error_buf),
"wrong type in snmp_build_var_op: %d", var_val_type);
ERROR_MSG(error_buf);
data = NULL;
}
}
DEBUGINDENTLESS();
if (data == NULL) {
return NULL;
}
dummyLen = (data - dataPtr) - headerLen;
asn_build_sequence(dataPtr, &dummyLen,
(u_char) (ASN_SEQUENCE | ASN_CONSTRUCTOR),
dummyLen);
return data;
}
#ifdef NETSNMP_USE_REVERSE_ASNENCODING
int
snmp_realloc_rbuild_var_op(u_char ** pkt, size_t * pkt_len,
size_t * offset, int allow_realloc,
const oid * var_name, size_t * var_name_len,
u_char var_val_type,
u_char * var_val, size_t var_val_len)
{
size_t start_offset = *offset;
int rc = 0;
/*
* Encode the value.
*/
DEBUGDUMPHEADER("send", "Value");
switch (var_val_type) {
case ASN_INTEGER:
rc = asn_realloc_rbuild_int(pkt, pkt_len, offset, allow_realloc,
var_val_type, (long *) var_val,
var_val_len);
break;
case ASN_GAUGE:
case ASN_COUNTER:
case ASN_TIMETICKS:
case ASN_UINTEGER:
rc = asn_realloc_rbuild_unsigned_int(pkt, pkt_len, offset,
allow_realloc, var_val_type,
(u_long *) var_val,
var_val_len);
break;
#ifdef NETSNMP_WITH_OPAQUE_SPECIAL_TYPES
case ASN_OPAQUE_COUNTER64:
case ASN_OPAQUE_U64:
#endif
case ASN_COUNTER64:
rc = asn_realloc_rbuild_unsigned_int64(pkt, pkt_len, offset,
allow_realloc, var_val_type,
(struct counter64 *)
var_val, var_val_len);
break;
case ASN_OCTET_STR:
case ASN_IPADDRESS:
case ASN_OPAQUE:
case ASN_NSAP:
rc = asn_realloc_rbuild_string(pkt, pkt_len, offset, allow_realloc,
var_val_type, var_val, var_val_len);
break;
case ASN_OBJECT_ID:
rc = asn_realloc_rbuild_objid(pkt, pkt_len, offset, allow_realloc,
var_val_type, (oid *) var_val,
var_val_len / sizeof(oid));
break;
case ASN_NULL:
rc = asn_realloc_rbuild_null(pkt, pkt_len, offset, allow_realloc,
var_val_type);
break;
case ASN_BIT_STR:
rc = asn_realloc_rbuild_bitstring(pkt, pkt_len, offset,
allow_realloc, var_val_type,
var_val, var_val_len);
break;
case SNMP_NOSUCHOBJECT:
case SNMP_NOSUCHINSTANCE:
case SNMP_ENDOFMIBVIEW:
rc = asn_realloc_rbuild_null(pkt, pkt_len, offset, allow_realloc,
var_val_type);
break;
#ifdef NETSNMP_WITH_OPAQUE_SPECIAL_TYPES
case ASN_OPAQUE_FLOAT:
rc = asn_realloc_rbuild_float(pkt, pkt_len, offset, allow_realloc,
var_val_type, (float *) var_val,
var_val_len);
break;
case ASN_OPAQUE_DOUBLE:
rc = asn_realloc_rbuild_double(pkt, pkt_len, offset, allow_realloc,
var_val_type, (double *) var_val,
var_val_len);
break;
case ASN_OPAQUE_I64:
rc = asn_realloc_rbuild_signed_int64(pkt, pkt_len, offset,
allow_realloc, var_val_type,
(struct counter64 *) var_val,
var_val_len);
break;
#endif /* NETSNMP_WITH_OPAQUE_SPECIAL_TYPES */
default:
{
char error_buf[64];
snprintf(error_buf, sizeof(error_buf),
"wrong type in snmp_realloc_rbuild_var_op: %d", var_val_type);
ERROR_MSG(error_buf);
rc = 0;
}
}
DEBUGINDENTLESS();
if (rc == 0) {
return 0;
}
/*
* Build the OID.
*/
DEBUGDUMPHEADER("send", "Name");
rc = asn_realloc_rbuild_objid(pkt, pkt_len, offset, allow_realloc,
(u_char) (ASN_UNIVERSAL | ASN_PRIMITIVE |
ASN_OBJECT_ID), var_name,
*var_name_len);
DEBUGINDENTLESS();
if (rc == 0) {
ERROR_MSG("Can't build OID for variable");
return 0;
}
/*
* Build the sequence header.
*/
rc = asn_realloc_rbuild_sequence(pkt, pkt_len, offset, allow_realloc,
(u_char) (ASN_SEQUENCE |
ASN_CONSTRUCTOR),
*offset - start_offset);
return rc;
}
#endif /* NETSNMP_USE_REVERSE_ASNENCODING */