X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/f555c163f90c9de17ebcef8313f86404c5174ca9..refs/heads/tcpdump-3.8:/print-snmp.c diff --git a/print-snmp.c b/print-snmp.c index 49b03f48..e6079f82 100644 --- a/print-snmp.c +++ b/print-snmp.c @@ -1,16 +1,29 @@ /* * Copyright (c) 1990, 1991, 1993, 1994, 1995, 1996, 1997 - * The Regents of the University of California. All rights reserved. + * John Robert LoVerso. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * - * Redistribution and use in source and binary forms are permitted - * provided that the above copyright notice and this paragraph are - * duplicated in all such forms and that any documentation, - * advertising materials, and other materials related to such - * distribution and use acknowledge that the software was developed - * by John Robert LoVerso. - * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR - * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED - * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. * * This implementation has been influenced by the CMU SNMP release, * by Steve Waldbusser. However, this shares no code with that system. @@ -21,6 +34,9 @@ * 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. * @@ -41,20 +57,23 @@ */ #ifndef lint -static const char rcsid[] = - "@(#) $Header: /tcpdump/master/tcpdump/print-snmp.c,v 1.33 1999-10-07 23:47:12 mcr Exp $ (LBL)"; +static const char rcsid[] _U_ = + "@(#) $Header: /tcpdump/master/tcpdump/print-snmp.c,v 1.56.2.3 2004-03-23 06:59:59 guy Exp $ (LBL)"; #endif -#include -#include - -#include -#ifdef HAVE_MEMORY_H -#include +#ifdef HAVE_CONFIG_H +#include "config.h" #endif + +#include + #include #include +#ifdef HAVE_SMI_H +#include +#endif + #include "interface.h" #include "addrtoname.h" @@ -62,7 +81,7 @@ static const char rcsid[] = * Universal ASN.1 types * (we only care about the tag values for those allowed in the Internet SMI) */ -char *Universal[] = { +const char *Universal[] = { "U-0", "Boolean", "Integer", @@ -85,7 +104,7 @@ char *Universal[] = { /* * Application-wide ASN.1 types from the Internet SMI and their tags */ -char *Application[] = { +const char *Application[] = { "IpAddress", #define IPADDR 0 "Counter", @@ -94,13 +113,17 @@ char *Application[] = { #define GAUGE 2 "TimeTicks", #define TIMETICKS 3 - "Opaque" + "Opaque", +#define OPAQUE 4 + "C-5", + "Counter64" +#define COUNTER64 6 }; /* * Context-specific ASN.1 types for the SNMP PDUs and their tags */ -char *Context[] = { +const char *Context[] = { "GetRequest", #define GETREQ 0 "GetNextRequest", @@ -109,37 +132,77 @@ char *Context[] = { #define GETRESP 2 "SetRequest", #define SETREQ 3 - "Trap" + "Trap", #define TRAP 4 + "GetBulk", +#define GETBULKREQ 5 + "Inform", +#define INFORMREQ 6 + "V2Trap", +#define V2TRAP 7 + "Report" +#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 + */ +const char *Exceptions[] = { + "noSuchObject", +#define NOSUCHOBJECT 0 + "noSuchInstance", +#define NOSUCHINSTANCE 1 + "endOfMibView", +#define ENDOFMIBVIEW 2 }; /* * Private ASN.1 types * The Internet SMI does not specify any */ -char *Private[] = { +const char *Private[] = { "P-0" }; /* * error-status values for any SNMP PDU */ -char *ErrorStatus[] = { +const char *ErrorStatus[] = { "noError", "tooBig", "noSuchName", "badValue", "readOnly", - "genErr" + "genErr", + "noAccess", + "wrongType", + "wrongLength", + "wrongEncoding", + "wrongValue", + "noCreation", + "inconsistentValue", + "resourceUnavailable", + "commitFailed", + "undoFailed", + "authorizationError", + "notWritable", + "inconsistentName" }; #define DECODE_ErrorStatus(e) \ - ( e >= 0 && e <= sizeof(ErrorStatus)/sizeof(ErrorStatus[0]) \ - ? ErrorStatus[e] : (sprintf(errbuf, "err=%u", e), errbuf)) + ( e >= 0 && (size_t)e < sizeof(ErrorStatus)/sizeof(ErrorStatus[0]) \ + ? ErrorStatus[e] \ + : (snprintf(errbuf, sizeof(errbuf), "err=%u", e), errbuf)) /* * generic-trap values in the SNMP Trap-PDU */ -char *GenericTrap[] = { +const char *GenericTrap[] = { "coldStart", "warmStart", "linkDown", @@ -147,11 +210,12 @@ char *GenericTrap[] = { "authenticationFailure", "egpNeighborLoss", "enterpriseSpecific" -#define GT_ENTERPRISE 7 +#define GT_ENTERPRISE 6 }; #define DECODE_GenericTrap(t) \ - ( t >= 0 && t <= sizeof(GenericTrap)/sizeof(GenericTrap[0]) \ - ? GenericTrap[t] : (sprintf(buf, "gt=%d", t), buf)) + ( t >= 0 && (size_t)t < sizeof(GenericTrap)/sizeof(GenericTrap[0]) \ + ? GenericTrap[t] \ + : (snprintf(buf, sizeof(buf), "gt=%d", t), buf)) /* * ASN.1 type class table @@ -160,8 +224,8 @@ char *GenericTrap[] = { */ #define defineCLASS(x) { "x", x, sizeof(x)/sizeof(x[0]) } /* not ANSI-C */ struct { - char *name; - char **Id; + const char *name; + const char **Id; int numIDs; } Class[] = { defineCLASS(Universal), @@ -172,12 +236,14 @@ struct { #define CONTEXT 2 defineCLASS(Private), #define PRIVATE 3 + defineCLASS(Exceptions), +#define EXCEPTIONS 4 }; /* * defined forms for ASN.1 types */ -char *Form[] = { +const char *Form[] = { "Primitive", #define PRIMITIVE 0 "Constructed", @@ -189,7 +255,7 @@ char *Form[] = { * This is stored as a general-order tree. */ struct obj { - char *desc; /* name of object */ + const char *desc; /* name of object */ u_char oid; /* sub-id following parent */ u_char type; /* object type (unused) */ struct obj *child, *next; /* child and next sibling pointers */ @@ -211,9 +277,9 @@ struct obj { * private enterprises tree, and the experimental tree. */ struct obj_abrev { - char *prefix; /* prefix for this abrev */ + const char *prefix; /* prefix for this abrev */ struct obj *node; /* pointer into object table */ - char *oid; /* ASN.1 encoded OID */ + const char *oid; /* ASN.1 encoded OID */ } obj_abrev_list[] = { #ifndef NO_ABREV_MIB /* .iso.org.dod.internet.mgmt.mib */ @@ -226,6 +292,10 @@ struct obj_abrev { #ifndef NO_ABREV_EXPERI /* .iso.org.dod.internet.experimental */ { "X:", &_experimental_obj, "\53\6\1\3" }, +#endif +#ifndef NO_ABBREV_SNMPMODS + /* .iso.org.dod.internet.snmpV2.snmpModules */ + { "S:", &_snmpModules_obj, "\53\6\1\6\3" }, #endif { 0,0,0 } }; @@ -260,6 +330,10 @@ struct be { int32_t integer; u_int32_t uns; const u_char *str; + struct { + u_int32_t high; + u_int32_t low; + } uns64; } data; u_short id; u_char form, class; /* tag info */ @@ -275,13 +349,30 @@ struct be { #define BE_SEQ 7 #define BE_INETADDR 8 #define BE_PDU 9 +#define BE_UNS64 10 +#define BE_NOSUCHOBJECT 128 +#define BE_NOSUCHINST 129 +#define BE_ENDOFMIBVIEW 130 +}; + +/* + * SNMP versions recognized by this module + */ +const char *SnmpVersion[] = { + "SNMPv1", +#define SNMP_VERSION_1 0 + "SNMPv2c", +#define SNMP_VERSION_2 1 + "SNMPv2u", +#define SNMP_VERSION_2U 2 + "SNMPv3" +#define SNMP_VERSION_3 3 }; /* * Defaults for SNMP PDU components */ #define DEF_COMMUNITY "public" -#define DEF_VERSION 0 /* * constants for ASN.1 decoding @@ -325,7 +416,7 @@ asn1_parse(register const u_char *p, u_int len, struct be *elem) elem->asnlen = 0; elem->type = BE_ANY; if (len < 1) { - ifNotTruncated puts("[nothing to parse], stdout"); + ifNotTruncated fputs("[nothing to parse]", stdout); return -1; } @@ -348,16 +439,11 @@ asn1_parse(register const u_char *p, u_int len, struct be *elem) elem->form = form; elem->class = class; elem->id = id; - if (vflag) - printf("|%.2x", *p); p++; len--; hdr = 1; /* extended tag field */ if (id == ASN_ID_EXT) { - for (id = 0; *p & ASN_BIT8 && len > 0; len--, hdr++, p++) { - if (vflag) - printf("|%.2x", *p); + for (id = 0; *p & ASN_BIT8 && len > 0; len--, hdr++, p++) id = (id << 7) | (*p & ~ASN_BIT8); - } if (len == 0 && *p & ASN_BIT8) { ifNotTruncated fputs("[Xtagfield?]", stdout); return -1; @@ -372,21 +458,16 @@ asn1_parse(register const u_char *p, u_int len, struct be *elem) return -1; } elem->asnlen = *p; - if (vflag) - printf("|%.2x", *p); p++; len--; hdr++; if (elem->asnlen & ASN_BIT8) { - int noct = elem->asnlen % ASN_BIT8; + u_int32_t noct = elem->asnlen % ASN_BIT8; elem->asnlen = 0; if (len < noct) { ifNotTruncated printf("[asnlen? %d<%d]", len, noct); return -1; } - for (; noct-- > 0; len--, hdr++) { - if (vflag) - printf("|%.2x", *p); + for (; noct-- > 0; len--, hdr++) elem->asnlen = (elem->asnlen << ASN_SHIFT8) | *p++; - } } if (len < elem->asnlen) { if (!truncated) { @@ -471,6 +552,20 @@ asn1_parse(register const u_char *p, u_int len, struct be *elem) break; } + case COUNTER64: { + register u_int32_t high, low; + elem->type = BE_UNS64; + high = 0, low = 0; + for (i = elem->asnlen; i-- > 0; p++) { + high = (high << 8) | + ((low & 0xFF000000) >> 24); + low = (low << 8) | *p; + } + elem->data.uns64.high = high; + elem->data.uns64.low = low; + break; + } + default: elem->type = BE_OCTET; elem->data.raw = (caddr_t)p; @@ -480,6 +575,25 @@ asn1_parse(register const u_char *p, u_int len, struct be *elem) } break; + case CONTEXT: + switch (id) { + case NOSUCHOBJECT: + elem->type = BE_NOSUCHOBJECT; + elem->data.raw = NULL; + break; + + case NOSUCHINSTANCE: + elem->type = BE_NOSUCHINST; + elem->data.raw = NULL; + break; + + case ENDOFMIBVIEW: + elem->type = BE_ENDOFMIBVIEW; + elem->data.raw = NULL; + break; + } + break; + default: elem->type = BE_OCTET; elem->data.raw = (caddr_t)p; @@ -535,12 +649,12 @@ asn1_print(struct be *elem) { u_char *p = (u_char *)elem->data.raw; u_int32_t asnlen = elem->asnlen; - int i; + u_int32_t i; switch (elem->type) { case BE_OCTET: - for (i = asnlen; i-- > 0; p++); + for (i = asnlen; i-- > 0; p++) printf("_%.2x", *p); break; @@ -550,7 +664,7 @@ asn1_print(struct be *elem) 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, @@ -564,20 +678,25 @@ asn1_print(struct be *elem) } } } - 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 + * (see X.690:1997 clause 8.19 for the details) */ if (first < 0) { + int s; if (!nflag) objp = mibroot; first = 0; - OBJ_PRINT(o/OIDMUX, first); - o %= OIDMUX; + s = o / OIDMUX; + if (s > 2) s = 2; + OBJ_PRINT(s, first); + o -= s * OIDMUX; } OBJ_PRINT(o, first); if (--first < 0) @@ -592,8 +711,50 @@ asn1_print(struct be *elem) break; case BE_UNS: - printf("%d", elem->data.uns); + printf("%u", elem->data.uns); + break; + + case BE_UNS64: { /* idea borrowed from by Marshall Rose */ + double d; + int j, carry; + char *cpf, *cpl, last[6], first[30]; + if (elem->data.uns64.high == 0) { + printf("%u", elem->data.uns64.low); + break; + } + 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); +#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--) { + j = carry + (*cpf - '0') + (*cpl - '0'); + if (j > 9) { + j -= 10; + carry = 1; + } else { + carry = 0; + } + *cpf = j + '0'; + } + fputs(first, stdout); break; + } case BE_STR: { register int printable = 1, first = 1; @@ -617,18 +778,19 @@ asn1_print(struct be *elem) 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='.'; + for (i = asnlen; i-- != 0; p++) { + printf((i == asnlen-1) ? "%u" : ".%u", *p); } - putchar(']'); break; - } + + case BE_NOSUCHOBJECT: + case BE_NOSUCHINST: + case BE_ENDOFMIBVIEW: + printf("[%s]", Class[EXCEPTIONS].Id[elem->id]); + break; case BE_PDU: printf("%s(%u)", @@ -678,6 +840,280 @@ asn1_decode(u_char *p, u_int length) } #endif +#ifdef LIBSMI + +struct smi2be { + SmiBasetype basetype; + int be; +}; + +static 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 oidsize, 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 + * (see X.690:1997 clause 8.19 for the details) + */ + if (first < 0) { + first = 0; + if (*oidlen < oidsize) { + oid[*oidlen] = o / OIDMUX; + if (oid[*oidlen] > 2) oid[*oidlen] = 2; + } + o -= oid[*oidlen] * OIDMUX; + if (*oidlen < oidsize) (*oidlen)++; + } + if (*oidlen < oidsize) { + 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 = 1; + + 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); + smiRange; + smiRange = smiGetNextRange(smiRange)) { + + ok = smi_check_a_range(smiType, smiRange, elem); + + if (ok) { + break; + } + } + + if (ok) { + SmiType *parentType; + parentType = smiGetParentType(smiType); + if (parentType) { + ok = smi_check_range(parentType, elem); + } + } + + 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, sizeof(oid)/sizeof(unsigned int), &oidlen); + smiNode = smiGetNodeByOID(oidlen, oid); + if (! smiNode) { + asn1_print(elem); + return NULL; + } + if (vflag) { + fputs(smiGetNodeModule(smiNode)->name, 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 (elem->type == BE_NOSUCHOBJECT + || elem->type == BE_NOSUCHINST + || elem->type == BE_ENDOFMIBVIEW) { + 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); + } + + smiType = smiGetNodeType(smiNode); + if (! smiType) { + asn1_print(elem); + return; + } + + if (! smi_check_type(smiType->basetype, elem->type)) { + fputs("[wrongType]", stdout); + } + + if (! smi_check_range(smiType, elem)) { + fputs("[outOfRange]", 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 (smiType->basetype == SMI_BASETYPE_BITS) { + /* print bit labels */ + } else { + smi_decode_oid(elem, oid, + sizeof(oid)/sizeof(unsigned int), + &oidlen); + smiNode = smiGetNodeByOID(oidlen, oid); + if (smiNode) { + if (vflag) { + fputs(smiGetNodeModule(smiNode)->name, 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 (smiType->basetype == SMI_BASETYPE_ENUM) { + for (nn = smiGetFirstNamedNumber(smiType); + 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); + } +} +#endif + /* * General SNMP header * SEQUENCE { @@ -715,10 +1151,13 @@ asn1_decode(u_char *p, u_int length) * 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) @@ -728,7 +1167,7 @@ varbind_print(u_char pduid, const u_char *np, u_int length, int error) asn1_print(&elem); return; } - if (count < length) + if ((u_int)count < length) printf("[%d extra after SEQ of varbind]", length - count); /* descend */ length = elem.asnlen; @@ -738,8 +1177,7 @@ varbind_print(u_char pduid, const u_char *np, u_int length, int error) const u_char *vbend; u_int vblength; - if (!error || ind == error) - fputs(" ", stdout); + fputs(" ", stdout); /* Sequence */ if ((count = asn1_parse(np, length, &elem)) < 0) @@ -763,35 +1201,44 @@ varbind_print(u_char pduid, const u_char *np, u_int length, int error) 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 && !error) + if (pduid != GETREQ && pduid != GETNEXTREQ + && pduid != GETBULKREQ) fputs("=", stdout); /* objVal (ANY) */ if ((count = asn1_parse(np, length, &elem)) < 0) return; - if (pduid == GETREQ || pduid == GETNEXTREQ) { + if (pduid == GETREQ || pduid == GETNEXTREQ + || pduid == GETBULKREQ) { if (elem.type != BE_NULL) { 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); +#else asn1_print(&elem); - +#endif + } + } length = vblength; np = vbend; } } /* - * Decode SNMP PDUs: GetRequest, GetNextRequest, GetResponse, and SetRequest + * Decode SNMP PDUs: GetRequest, GetNextRequest, GetResponse, SetRequest, + * GetBulk, Inform, V2Trap, and Report */ static void snmppdu_print(u_char pduid, const u_char *np, u_int length) @@ -807,7 +1254,8 @@ snmppdu_print(u_char pduid, const u_char *np, u_int length) asn1_print(&elem); return; } - /* ignore the reqId */ + if (vflag) + printf("R=%d ", elem.data.integer); length -= count; np += count; @@ -820,11 +1268,14 @@ snmppdu_print(u_char pduid, const u_char *np, u_int length) return; } error = 0; - if ((pduid == GETREQ || pduid == GETNEXTREQ) + if ((pduid == GETREQ || pduid == GETNEXTREQ || pduid == SETREQ + || pduid == INFORMREQ || pduid == V2TRAP || pduid == REPORT) && elem.data.integer != 0) { char errbuf[10]; printf("[errorStatus(%s)!=0]", DECODE_ErrorStatus(elem.data.integer)); + } else if (pduid == GETBULKREQ) { + printf(" N=%d", elem.data.integer); } else if (elem.data.integer != 0) { char errbuf[10]; printf(" %s", DECODE_ErrorStatus(elem.data.integer)); @@ -841,9 +1292,12 @@ snmppdu_print(u_char pduid, const u_char *np, u_int length) asn1_print(&elem); return; } - if ((pduid == GETREQ || pduid == GETNEXTREQ) + if ((pduid == GETREQ || pduid == GETNEXTREQ || pduid == SETREQ + || pduid == INFORMREQ || pduid == V2TRAP || pduid == REPORT) && elem.data.integer != 0) printf("[errorIndex(%d)!=0]", elem.data.integer); + else if (pduid == GETBULKREQ) + printf(" M=%d", elem.data.integer); else if (elem.data.integer != 0) { if (!error) printf("[errorIndex(%d) w/o errorStatus]", @@ -859,7 +1313,7 @@ snmppdu_print(u_char pduid, const u_char *np, u_int length) length -= count; np += count; - varbind_print(pduid, np, length, error); + varbind_print(pduid, np, length); return; } @@ -867,7 +1321,7 @@ snmppdu_print(u_char pduid, const u_char *np, u_int length) * Decode SNMP Trap PDU */ static void -trap_print(const u_char *np, u_int length) +trappdu_print(const u_char *np, u_int length) { struct be elem; int count = 0, generic; @@ -946,58 +1400,132 @@ trap_print(const u_char *np, u_int length) length -= count; np += count; - varbind_print (TRAP, np, length, 0); + varbind_print (TRAP, np, length); return; } /* - * Decode SNMP header and pass on to PDU printing routines + * Decode arbitrary SNMP PDUs. */ -void -snmp_print(const u_char *np, u_int length) +static void +pdu_print(const u_char *np, u_int length, int version) { - struct be elem, pdu; + struct be pdu; int count = 0; - truncated = 0; + /* PDU (Context) */ + if ((count = asn1_parse(np, length, &pdu)) < 0) + return; + if (pdu.type != BE_PDU) { + fputs("[no PDU]", stdout); + return; + } + if ((u_int)count < length) + printf("[%d extra after PDU]", length - count); + if (vflag) { + fputs("{ ", stdout); + } + asn1_print(&pdu); + fputs(" ", stdout); + /* descend into PDU */ + length = pdu.asnlen; + np = (u_char *)pdu.data.raw; - /* truncated packet? */ - if (np + length > snapend) { - truncated = 1; - length = snapend - np; + if (version == SNMP_VERSION_1 && + (pdu.id == GETBULKREQ || pdu.id == INFORMREQ || + pdu.id == V2TRAP || pdu.id == REPORT)) { + printf("[v2 PDU in v1 message]"); + return; } - putchar(' '); + if (version == SNMP_VERSION_2 && pdu.id == TRAP) { + printf("[v1 PDU in v2 message]"); + return; + } - /* initial Sequence */ + switch (pdu.id) { + case TRAP: + trappdu_print(np, length); + break; + case GETREQ: + case GETNEXTREQ: + case GETRESP: + case SETREQ: + case GETBULKREQ: + case INFORMREQ: + case V2TRAP: + case REPORT: + snmppdu_print(pdu.id, np, length); + break; + } + + if (vflag) { + fputs(" } ", stdout); + } +} + +/* + * Decode a scoped SNMP PDU. + */ +static void +scopedpdu_print(const u_char *np, u_int length, int version) +{ + struct be elem; + int i, count = 0; + + /* Sequence */ if ((count = asn1_parse(np, length, &elem)) < 0) return; if (elem.type != BE_SEQ) { - fputs("[!init SEQ]", stdout); + fputs("[!scoped PDU]", stdout); asn1_print(&elem); return; } - if (count < length) - printf("[%d extra after iSEQ]", length - count); - /* descend */ length = elem.asnlen; np = (u_char *)elem.data.raw; - /* Version (Integer) */ + + /* contextEngineID (OCTET STRING) */ if ((count = asn1_parse(np, length, &elem)) < 0) return; - if (elem.type != BE_INT) { - fputs("[version!=INT]", stdout); + if (elem.type != BE_STR) { + fputs("[contextEngineID!=STR]", stdout); asn1_print(&elem); return; } - /* only handle version==0 */ - if (elem.data.integer != DEF_VERSION) { - printf("[version(%d)!=0]", elem.data.integer); + length -= count; + np += count; + + fputs("E= ", stdout); + for (i = 0; i < (int)elem.asnlen; i++) { + printf("0x%02X", elem.data.str[i]); + } + fputs(" ", stdout); + + /* contextName (OCTET STRING) */ + if ((count = asn1_parse(np, length, &elem)) < 0) + return; + if (elem.type != BE_STR) { + fputs("[contextName!=STR]", stdout); + asn1_print(&elem); return; } length -= count; np += count; + printf("C=%.*s ", (int)elem.asnlen, elem.data.str); + + pdu_print(np, length, version); +} + +/* + * Decode SNMP Community Header (SNMPv1 and SNMPv2c) + */ +static void +community_print(const u_char *np, u_int length, int version) +{ + struct be elem; + int count = 0; + /* Community (String) */ if ((count = asn1_parse(np, length, &elem)) < 0) return; @@ -1007,37 +1535,322 @@ snmp_print(const u_char *np, u_int length) return; } /* default community */ - if (strncmp((char *)elem.data.str, DEF_COMMUNITY, - sizeof(DEF_COMMUNITY) - 1)) + if (!(elem.asnlen == sizeof(DEF_COMMUNITY) - 1 && + strncmp((char *)elem.data.str, DEF_COMMUNITY, + sizeof(DEF_COMMUNITY) - 1) == 0)) /* ! "public" */ printf("C=%.*s ", (int)elem.asnlen, elem.data.str); length -= count; np += count; - /* PDU (Context) */ - if ((count = asn1_parse(np, length, &pdu)) < 0) + pdu_print(np, length, version); +} + +/* + * Decode SNMPv3 User-based Security Message Header (SNMPv3) + */ +static void +usm_print(const u_char *np, u_int length) +{ + struct be elem; + int count = 0; + + /* Sequence */ + if ((count = asn1_parse(np, length, &elem)) < 0) return; - if (pdu.type != BE_PDU) { - fputs("[no PDU]", stdout); + if (elem.type != BE_SEQ) { + fputs("[!usm]", stdout); + asn1_print(&elem); return; } - if (count < length) - printf("[%d extra after PDU]", length - count); - asn1_print(&pdu); - /* descend into PDU */ - length = pdu.asnlen; - np = (u_char *)pdu.data.raw; + length = elem.asnlen; + np = (u_char *)elem.data.raw; - switch (pdu.id) { - case TRAP: - trap_print(np, length); + /* msgAuthoritativeEngineID (OCTET STRING) */ + if ((count = asn1_parse(np, length, &elem)) < 0) + return; + if (elem.type != BE_STR) { + fputs("[msgAuthoritativeEngineID!=STR]", stdout); + asn1_print(&elem); + return; + } + length -= count; + np += count; + + /* msgAuthoritativeEngineBoots (INTEGER) */ + if ((count = asn1_parse(np, length, &elem)) < 0) + return; + if (elem.type != BE_INT) { + fputs("[msgAuthoritativeEngineBoots!=INT]", stdout); + asn1_print(&elem); + return; + } + if (vflag) + printf("B=%d ", elem.data.integer); + length -= count; + np += count; + + /* msgAuthoritativeEngineTime (INTEGER) */ + if ((count = asn1_parse(np, length, &elem)) < 0) + return; + if (elem.type != BE_INT) { + fputs("[msgAuthoritativeEngineTime!=INT]", stdout); + asn1_print(&elem); + return; + } + if (vflag) + printf("T=%d ", elem.data.integer); + length -= count; + np += count; + + /* msgUserName (OCTET STRING) */ + if ((count = asn1_parse(np, length, &elem)) < 0) + return; + if (elem.type != BE_STR) { + fputs("[msgUserName!=STR]", stdout); + asn1_print(&elem); + return; + } + length -= count; + np += count; + + printf("U=%.*s ", (int)elem.asnlen, elem.data.str); + + /* msgAuthenticationParameters (OCTET STRING) */ + if ((count = asn1_parse(np, length, &elem)) < 0) + return; + if (elem.type != BE_STR) { + fputs("[msgAuthenticationParameters!=STR]", stdout); + asn1_print(&elem); + return; + } + length -= count; + np += count; + + /* msgPrivacyParameters (OCTET STRING) */ + if ((count = asn1_parse(np, length, &elem)) < 0) + return; + if (elem.type != BE_STR) { + fputs("[msgPrivacyParameters!=STR]", stdout); + asn1_print(&elem); + return; + } + length -= count; + np += count; + + if ((u_int)count < length) + printf("[%d extra after usm SEQ]", length - count); +} + +/* + * Decode SNMPv3 Message Header (SNMPv3) + */ +static void +v3msg_print(const u_char *np, u_int length) +{ + struct be elem; + int count = 0; + u_char flags; + int model; + const u_char *xnp = np; + int xlength = length; + + /* Sequence */ + if ((count = asn1_parse(np, length, &elem)) < 0) + return; + if (elem.type != BE_SEQ) { + fputs("[!message]", stdout); + asn1_print(&elem); + return; + } + length = elem.asnlen; + np = (u_char *)elem.data.raw; + + if (vflag) { + fputs("{ ", stdout); + } + + /* msgID (INTEGER) */ + if ((count = asn1_parse(np, length, &elem)) < 0) + return; + if (elem.type != BE_INT) { + fputs("[msgID!=INT]", stdout); + asn1_print(&elem); + return; + } + length -= count; + np += count; + + /* msgMaxSize (INTEGER) */ + if ((count = asn1_parse(np, length, &elem)) < 0) + return; + if (elem.type != BE_INT) { + fputs("[msgMaxSize!=INT]", stdout); + asn1_print(&elem); + return; + } + length -= count; + np += count; + + /* msgFlags (OCTET STRING) */ + if ((count = asn1_parse(np, length, &elem)) < 0) + return; + if (elem.type != BE_STR) { + fputs("[msgFlags!=STR]", stdout); + asn1_print(&elem); + return; + } + if (elem.asnlen != 1) { + printf("[msgFlags size %d]", elem.asnlen); + return; + } + flags = elem.data.str[0]; + if (flags != 0x00 && flags != 0x01 && flags != 0x03 + && flags != 0x04 && flags != 0x05 && flags != 0x07) { + printf("[msgFlags=0x%02X]", flags); + return; + } + length -= count; + np += count; + + fputs("F=", stdout); + if (flags & 0x01) fputs("a", stdout); + if (flags & 0x02) fputs("p", stdout); + if (flags & 0x04) fputs("r", stdout); + fputs(" ", stdout); + + /* msgSecurityModel (INTEGER) */ + if ((count = asn1_parse(np, length, &elem)) < 0) + return; + if (elem.type != BE_INT) { + fputs("[msgSecurityModel!=INT]", stdout); + asn1_print(&elem); + return; + } + model = elem.data.integer; + length -= count; + np += count; + + if ((u_int)count < length) + printf("[%d extra after message SEQ]", length - count); + + if (vflag) { + fputs("} ", stdout); + } + + if (model == 3) { + if (vflag) { + fputs("{ USM ", stdout); + } + } else { + printf("[security model %d]", model); + return; + } + + np = xnp + (np - xnp); + length = xlength - (np - xnp); + + /* msgSecurityParameters (OCTET STRING) */ + if ((count = asn1_parse(np, length, &elem)) < 0) + return; + if (elem.type != BE_STR) { + fputs("[msgSecurityParameters!=STR]", stdout); + asn1_print(&elem); + return; + } + length -= count; + np += count; + + if (model == 3) { + usm_print(elem.data.str, elem.asnlen); + if (vflag) { + fputs("} ", stdout); + } + } + + if (vflag) { + fputs("{ ScopedPDU ", stdout); + } + + scopedpdu_print(np, length, 3); + + if (vflag) { + fputs("} ", stdout); + } +} + +/* + * Decode SNMP header and pass on to PDU printing routines + */ +void +snmp_print(const u_char *np, u_int length) +{ + struct be elem; + int count = 0; + int version = 0; + + truncated = 0; + + /* truncated packet? */ + if (np + length > snapend) { + truncated = 1; + length = snapend - np; + } + + putchar(' '); + + /* initial Sequence */ + if ((count = asn1_parse(np, length, &elem)) < 0) + return; + if (elem.type != BE_SEQ) { + fputs("[!init SEQ]", stdout); + asn1_print(&elem); + return; + } + if ((u_int)count < length) + printf("[%d extra after iSEQ]", length - count); + /* descend */ + length = elem.asnlen; + np = (u_char *)elem.data.raw; + + /* Version (INTEGER) */ + if ((count = asn1_parse(np, length, &elem)) < 0) + return; + if (elem.type != BE_INT) { + fputs("[version!=INT]", stdout); + asn1_print(&elem); + return; + } + + switch (elem.data.integer) { + case SNMP_VERSION_1: + case SNMP_VERSION_2: + case SNMP_VERSION_3: + if (vflag) + printf("{ %s ", SnmpVersion[elem.data.integer]); break; - case GETREQ: - case GETNEXTREQ: - case GETRESP: - case SETREQ: - snmppdu_print(pdu.id, np, length); + default: + printf("[version = %d]", elem.data.integer); + return; + } + version = elem.data.integer; + length -= count; + np += count; + + switch (version) { + case SNMP_VERSION_1: + case SNMP_VERSION_2: + community_print(np, length, version); + break; + case SNMP_VERSION_3: + v3msg_print(np, length); + break; + default: + printf("[version = %d]", elem.data.integer); break; } - return; + + if (vflag) { + fputs("} ", stdout); + } }