* that work is preserved below, even though it may not rightly apply
* to this file.
*
+ * Support for SNMPv2c/SNMPv3 and the ability to link the module against
+ * the libsmi was added by J. Schoenwaelder, Copyright (c) 1999.
+ *
* This started out as a very simple program, but the incremental decoding
* (into the BE structure) complicated things.
*
#ifndef lint
static const char rcsid[] =
- "@(#) $Header: /tcpdump/master/tcpdump/print-snmp.c,v 1.37 1999-11-21 09:37:01 fenner Exp $ (LBL)";
+ "@(#) $Header: /tcpdump/master/tcpdump/print-snmp.c,v 1.40 2000-01-17 06:24:26 itojun Exp $ (LBL)";
#endif
#ifdef HAVE_CONFIG_H
#include <stdio.h>
#include <string.h>
+#ifdef HAVE_SMI_H
+#include <smi.h>
+#endif
+
#include "interface.h"
#include "addrtoname.h"
#define REPORT 8
};
+#define NOTIFY_CLASS(x) (x == TRAP || x == V2TRAP || x == INFORMREQ)
+#define READ_CLASS(x) (x == GETREQ || x == GETNEXTREQ || x == GETBULKREQ)
+#define WRITE_CLASS(x) (x == SETREQ)
+#define RESPONSE_CLASS(x) (x == GETRESP)
+#define INTERNAL_CLASS(x) (x == REPORT)
+
/*
* Context-specific ASN.1 types for the SNMP Exceptions and their tags
*/
};
#define DECODE_ErrorStatus(e) \
( e >= 0 && e < sizeof(ErrorStatus)/sizeof(ErrorStatus[0]) \
- ? ErrorStatus[e] : (sprintf(errbuf, "err=%u", e), errbuf))
+ ? ErrorStatus[e] \
+ : (snprintf(errbuf, sizeof(errbuf), "err=%u", e), errbuf))
/*
* generic-trap values in the SNMP Trap-PDU
};
#define DECODE_GenericTrap(t) \
( t >= 0 && t < sizeof(GenericTrap)/sizeof(GenericTrap[0]) \
- ? GenericTrap[t] : (sprintf(buf, "gt=%d", t), buf))
+ ? GenericTrap[t] \
+ : (snprintf(buf, sizeof(buf), "gt=%d", t), buf))
/*
* ASN.1 type class table
case BE_OID: {
int o = 0, first = -1, i = asnlen;
- if (!nflag && asnlen > 2) {
+ if (!sflag && !nflag && asnlen > 2) {
struct obj_abrev *a = &obj_abrev_list[0];
for (; a->node; a++) {
if (!memcmp(a->oid, (char *)p,
}
}
}
- for (; i-- > 0; p++) {
+
+ for (; !sflag && i-- > 0; p++) {
o = (o << ASN_SHIFT7) + (*p & ~ASN_BIT8);
if (*p & ASN_LONGLEN)
- continue;
-
+ continue;
+
/*
* first subitem encodes two items with 1st*OIDMUX+2nd
*/
break;
case BE_UNS:
- printf("%d", elem->data.uns);
+ printf("%u", elem->data.uns);
break;
case BE_UNS64: { /* idea borrowed from by Marshall Rose */
d = elem->data.uns64.high * 4294967296.0; /* 2^32 */
if (elem->data.uns64.high <= 0x1fffff) {
d += elem->data.uns64.low;
+#if 0 /*is looks illegal, but what is the intention???*/
printf("%.f", d);
+#else
+ printf("%f", d);
+#endif
break;
}
d += (elem->data.uns64.low & 0xfffff000);
- sprintf(first, "%.f", d);
- sprintf(last, "%5.5d", elem->data.uns64.low & 0xfff);
+#if 0 /*is looks illegal, but what is the intention???*/
+ snprintf(first, sizeof(first), "%.f", d);
+#else
+ snprintf(first, sizeof(first), "%f", d);
+#endif
+ snprintf(last, sizeof(last), "%5.5d",
+ elem->data.uns64.low & 0xfff);
for (carry = 0, cpf = first+strlen(first)-1, cpl = last+4;
cpl >= last;
cpf--, cpl--) {
printf("Seq(%u)", elem->asnlen);
break;
- case BE_INETADDR: {
- char sep;
+ case BE_INETADDR:
if (asnlen != ASNLEN_INETADDR)
printf("[inetaddr len!=%d]", ASNLEN_INETADDR);
- sep='[';
for (i = asnlen; i-- > 0; p++) {
- printf("%c%u", sep, *p);
- sep='.';
+ printf((i == asnlen-1) ? "%u" : ".%u", *p);
}
- putchar(']');
break;
- }
case BE_NOSUCHOBJECT:
case BE_NOSUCHINST:
}
#endif
+#ifdef LIBSMI
+
+struct smi2be {
+ SmiBasetype basetype;
+ int be;
+};
+
+struct smi2be smi2betab[] = {
+ { SMI_BASETYPE_INTEGER32, BE_INT },
+ { SMI_BASETYPE_OCTETSTRING, BE_STR },
+ { SMI_BASETYPE_OCTETSTRING, BE_INETADDR },
+ { SMI_BASETYPE_OBJECTIDENTIFIER, BE_OID },
+ { SMI_BASETYPE_UNSIGNED32, BE_UNS },
+ { SMI_BASETYPE_INTEGER64, BE_NONE },
+ { SMI_BASETYPE_UNSIGNED64, BE_UNS64 },
+ { SMI_BASETYPE_FLOAT32, BE_NONE },
+ { SMI_BASETYPE_FLOAT64, BE_NONE },
+ { SMI_BASETYPE_FLOAT128, BE_NONE },
+ { SMI_BASETYPE_ENUM, BE_INT },
+ { SMI_BASETYPE_BITS, BE_STR },
+ { SMI_BASETYPE_UNKNOWN, BE_NONE }
+};
+
+static void smi_decode_oid(struct be *elem, unsigned int *oid,
+ unsigned int *oidlen)
+{
+ u_char *p = (u_char *)elem->data.raw;
+ u_int32_t asnlen = elem->asnlen;
+ int o = 0, first = -1, i = asnlen;
+
+ for (*oidlen = 0; sflag && i-- > 0; p++) {
+ o = (o << ASN_SHIFT7) + (*p & ~ASN_BIT8);
+ if (*p & ASN_LONGLEN)
+ continue;
+
+ /*
+ * first subitem encodes two items with 1st*OIDMUX+2nd
+ */
+ if (first < 0) {
+ first = 0;
+ oid[(*oidlen)++] = o/OIDMUX;
+ o %= OIDMUX;
+ }
+ oid[(*oidlen)++] = o;
+ o = 0;
+ }
+}
+
+static int smi_check_type(SmiBasetype basetype, int be)
+{
+ int i;
+
+ for (i = 0; smi2betab[i].basetype != SMI_BASETYPE_UNKNOWN; i++) {
+ if (smi2betab[i].basetype == basetype && smi2betab[i].be == be) {
+ return 1;
+ }
+ }
+
+ return 0;
+}
+
+static int smi_check_a_range(SmiType *smiType, SmiRange *smiRange,
+ struct be *elem)
+{
+ int ok;
+
+ switch (smiType->basetype) {
+ case SMI_BASETYPE_OBJECTIDENTIFIER:
+ case SMI_BASETYPE_OCTETSTRING:
+ if (smiRange->minValue.value.unsigned32
+ == smiRange->maxValue.value.unsigned32) {
+ ok = (elem->asnlen == smiRange->minValue.value.unsigned32);
+ } else {
+ ok = (elem->asnlen >= smiRange->minValue.value.unsigned32
+ && elem->asnlen <= smiRange->maxValue.value.unsigned32);
+ }
+ break;
+
+ case SMI_BASETYPE_INTEGER32:
+ ok = (elem->data.integer >= smiRange->minValue.value.integer32
+ && elem->data.integer <= smiRange->maxValue.value.integer32);
+ break;
+
+ case SMI_BASETYPE_UNSIGNED32:
+ ok = (elem->data.uns >= smiRange->minValue.value.unsigned32
+ && elem->data.uns <= smiRange->maxValue.value.unsigned32);
+ break;
+
+ case SMI_BASETYPE_UNSIGNED64:
+ /* XXX */
+ break;
+
+ /* case SMI_BASETYPE_INTEGER64: SMIng */
+ /* case SMI_BASETYPE_FLOAT32: SMIng */
+ /* case SMI_BASETYPE_FLOAT64: SMIng */
+ /* case SMI_BASETYPE_FLOAT128: SMIng */
+
+ case SMI_BASETYPE_ENUM:
+ case SMI_BASETYPE_BITS:
+ case SMI_BASETYPE_UNKNOWN:
+ ok = 1;
+ break;
+ }
+
+ return ok;
+}
+
+static int smi_check_range(SmiType *smiType, struct be *elem)
+{
+ SmiRange *smiRange;
+ int ok = 1;
+
+ for (smiRange = smiGetFirstRange(smiType->module, smiType->name);
+ smiRange;
+ smiRange = smiGetNextRange(smiRange)) {
+
+ ok = smi_check_a_range(smiType, smiRange, elem);
+
+ if (ok) {
+ smiFreeRange(smiRange);
+ break;
+ }
+ }
+
+ if (ok && smiType->parentmodule && smiType->parentname) {
+ SmiType *parentType;
+ parentType = smiGetType(smiType->parentmodule,
+ smiType->parentname);
+ if (parentType) {
+ ok = smi_check_range(parentType, elem);
+ smiFreeType(parentType);
+ }
+ }
+
+ return ok;
+}
+
+static SmiNode *smi_print_variable(struct be *elem)
+{
+ unsigned int oid[128], oidlen;
+ SmiNode *smiNode = NULL;
+ int i;
+
+ smi_decode_oid(elem, oid, &oidlen);
+ smiNode = smiGetNodeByOID(oidlen, oid);
+ if (! smiNode) {
+ asn1_print(elem);
+ return NULL;
+ }
+ if (vflag) {
+ fputs(smiNode->module, stdout);
+ fputs("::", stdout);
+ }
+ fputs(smiNode->name, stdout);
+ if (smiNode->oidlen < oidlen) {
+ for (i = smiNode->oidlen; i < oidlen; i++) {
+ printf(".%u", oid[i]);
+ }
+ }
+ return smiNode;
+}
+
+static void smi_print_value(SmiNode *smiNode, u_char pduid, struct be *elem)
+{
+ unsigned int oid[128], oidlen;
+ SmiType *smiType;
+ SmiNamedNumber *nn;
+ int i, done = 0;
+
+ if (! smiNode || ! (smiNode->nodekind
+ & (SMI_NODEKIND_SCALAR | SMI_NODEKIND_COLUMN))) {
+ asn1_print(elem);
+ return;
+ }
+
+ if (NOTIFY_CLASS(pduid) && smiNode->access < SMI_ACCESS_NOTIFY) {
+ fputs("[notNotifyable]", stdout);
+ }
+
+ if (READ_CLASS(pduid) && smiNode->access < SMI_ACCESS_READ_ONLY) {
+ fputs("[notReadable]", stdout);
+ }
+
+ if (WRITE_CLASS(pduid) && smiNode->access < SMI_ACCESS_READ_WRITE) {
+ fputs("[notWritable]", stdout);
+ }
+
+ if (RESPONSE_CLASS(pduid)
+ && smiNode->access == SMI_ACCESS_NOT_ACCESSIBLE) {
+ fputs("[noAccess]", stdout);
+ }
+
+ if (! smi_check_type(smiNode->basetype, elem->type)) {
+ fputs("[wrongType]", stdout);
+ }
+
+ smiType = smiGetType(smiNode->typemodule, smiNode->typename);
+ if (! smiType) {
+ asn1_print(elem);
+ return;
+ }
+
+ if (! smi_check_range(smiType, elem)) {
+ fputs("[wrongLength]", stdout);
+ }
+
+ /* resolve bits to named bits */
+
+ /* check whether instance identifier is valid */
+
+ /* apply display hints (integer, octetstring) */
+
+ /* convert instance identifier to index type values */
+
+ switch (elem->type) {
+ case BE_OID:
+ if (smiNode->basetype == SMI_BASETYPE_BITS
+ && smiNode->typemodule && smiNode->typename) {
+ /* print bit labels */
+ } else {
+ smi_decode_oid(elem, oid, &oidlen);
+ smiNode = smiGetNodeByOID(oidlen, oid);
+ if (smiNode) {
+ if (vflag) {
+ fputs(smiNode->module, stdout);
+ fputs("::", stdout);
+ }
+ fputs(smiNode->name, stdout);
+ if (smiNode->oidlen < oidlen) {
+ for (i = smiNode->oidlen;
+ i < oidlen; i++) {
+ printf(".%u", oid[i]);
+ }
+ }
+ done++;
+ }
+ }
+ break;
+
+ case BE_INT:
+ if (smiNode->basetype == SMI_BASETYPE_ENUM
+ && smiNode->typemodule && smiNode->typename) {
+ for (nn = smiGetFirstNamedNumber(smiNode->typemodule,
+ smiNode->typename);
+ nn;
+ nn = smiGetNextNamedNumber(nn)) {
+ if (nn->value.value.integer32
+ == elem->data.integer) {
+ fputs(nn->name, stdout);
+ printf("(%d)", elem->data.integer);
+ done++;
+ break;
+ }
+ }
+ }
+ break;
+ }
+
+ if (! done) {
+ asn1_print(elem);
+ }
+
+ if (smiType) {
+ smiFreeType(smiType);
+ }
+}
+#endif
+
/*
* General SNMP header
* SEQUENCE {
* Decode SNMP varBind
*/
static void
-varbind_print(u_char pduid, const u_char *np, u_int length, int error)
+varbind_print(u_char pduid, const u_char *np, u_int length)
{
struct be elem;
int count = 0, ind;
+#ifdef LIBSMI
+ SmiNode *smiNode = NULL;
+#endif
/* Sequence of varBind */
if ((count = asn1_parse(np, length, &elem)) < 0)
const u_char *vbend;
u_int vblength;
- if (!error || ind == error)
- fputs(" ", stdout);
+ fputs(" ", stdout);
/* Sequence */
if ((count = asn1_parse(np, length, &elem)) < 0)
asn1_print(&elem);
return;
}
- if (!error || ind == error)
- asn1_print(&elem);
+#ifdef LIBSMI
+ smiNode = smi_print_variable(&elem);
+#else
+ asn1_print(&elem);
+#endif
length -= count;
np += count;
if (pduid != GETREQ && pduid != GETNEXTREQ
- && pduid != GETBULKREQ && !error)
+ && pduid != GETBULKREQ)
fputs("=", stdout);
/* objVal (ANY) */
fputs("[objVal!=NULL]", stdout);
asn1_print(&elem);
}
- } else
- if (error && ind == error && elem.type != BE_NULL)
- fputs("[err objVal!=NULL]", stdout);
- if (!error || ind == error)
+ } else {
+ if (elem.type != BE_NULL) {
+#ifdef LIBSMI
+ smi_print_value(smiNode, pduid, &elem);
+ smiFreeNode(smiNode);
+#else
asn1_print(&elem);
-
+#endif
+ }
+ }
length = vblength;
np = vbend;
}
length -= count;
np += count;
- varbind_print(pduid, np, length, error);
+ varbind_print(pduid, np, length);
return;
}
length -= count;
np += count;
- varbind_print (TRAP, np, length, 0);
+ varbind_print (TRAP, np, length);
return;
}
projects / tcpdump / blobdiff