diff options
Diffstat (limited to 'usr.sbin/tcpdump/tcpdump/print-snmp.c')
| -rw-r--r-- | usr.sbin/tcpdump/tcpdump/print-snmp.c | 1032 |
1 files changed, 0 insertions, 1032 deletions
diff --git a/usr.sbin/tcpdump/tcpdump/print-snmp.c b/usr.sbin/tcpdump/tcpdump/print-snmp.c deleted file mode 100644 index 0a6cb58..0000000 --- a/usr.sbin/tcpdump/tcpdump/print-snmp.c +++ /dev/null @@ -1,1032 +0,0 @@ -/* - * Copyright (c) 1990, 1991, 1993, 1994 - * John Robert LoVerso. All rights reserved. - * - * 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 MERCHANTIBILITY 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. - * Additional ASN.1 insight gained from Marshall T. Rose's _The_Open_Book_. - * Earlier forms of this implementation were derived and/or inspired by an - * awk script originally written by C. Philip Wood of LANL (but later - * heavily modified by John Robert LoVerso). The copyright notice for - * that work is preserved below, even though it may not rightly apply - * to this file. - * - * This started out as a very simple program, but the incremental decoding - * (into the BE structure) complicated things. - * - # Los Alamos National Laboratory - # - # Copyright, 1990. The Regents of the University of California. - # This software was produced under a U.S. Government contract - # (W-7405-ENG-36) by Los Alamos National Laboratory, which is - # operated by the University of California for the U.S. Department - # of Energy. The U.S. Government is licensed to use, reproduce, - # and distribute this software. Permission is granted to the - # public to copy and use this software without charge, provided - # that this Notice and any statement of authorship are reproduced - # on all copies. Neither the Government nor the University makes - # any warranty, express or implied, or assumes any liability or - # responsibility for the use of this software. - # @(#)snmp.awk.x 1.1 (LANL) 1/15/90 - */ -#ifndef lint -static char rcsid[] = - "@(#) $Id: print-snmp.c,v 3.10 91/01/17 01:18:13 loverso Exp Locker: loverso $ (jlv)"; -#endif - -#include <sys/param.h> -#include <sys/time.h> -#include <sys/types.h> - -#include <stdio.h> -#include <ctype.h> -#include <string.h> - -#include "interface.h" -#include "addrtoname.h" - -/* - * Universal ASN.1 types - * (we only care about the tag values for those allowed in the Internet SMI) - */ -char *Universal[] = { - "U-0", - "Boolean", - "Integer", -#define INTEGER 2 - "Bitstring", - "String", -#define STRING 4 - "Null", -#define ASN_NULL 5 - "ObjID", -#define OBJECTID 6 - "ObjectDes", - "U-8","U-9","U-10","U-11", /* 8-11 */ - "U-12","U-13","U-14","U-15", /* 12-15 */ - "Sequence", -#define SEQUENCE 16 - "Set" -}; - -/* - * Application-wide ASN.1 types from the Internet SMI and their tags - */ -char *Application[] = { - "IpAddress", -#define IPADDR 0 - "Counter", -#define COUNTER 1 - "Gauge", -#define GAUGE 2 - "TimeTicks", -#define TIMETICKS 3 - "Opaque" -}; - -/* - * Context-specific ASN.1 types for the SNMP PDUs and their tags - */ -char *Context[] = { - "GetRequest", -#define GETREQ 0 - "GetNextRequest", -#define GETNEXTREQ 1 - "GetResponse", -#define GETRESP 2 - "SetRequest", -#define SETREQ 3 - "Trap" -#define TRAP 4 -}; - -/* - * Private ASN.1 types - * The Internet SMI does not specify any - */ -char *Private[] = { - "P-0" -}; - -/* - * error-status values for any SNMP PDU - */ -char *ErrorStatus[] = { - "noError", - "tooBig", - "noSuchName", - "badValue", - "readOnly", - "genErr" -}; -#define DECODE_ErrorStatus(e) \ - ( e >= 0 && e <= sizeof(ErrorStatus)/sizeof(ErrorStatus[0]) \ - ? ErrorStatus[e] : (sprintf(errbuf, "err=%d", e), errbuf)) - -/* - * generic-trap values in the SNMP Trap-PDU - */ -char *GenericTrap[] = { - "coldStart", - "warmStart", - "linkDown", - "linkUp", - "authenticationFailure", - "egpNeighborLoss", - "enterpriseSpecific" -#define GT_ENTERPRISE 7 -}; -#define DECODE_GenericTrap(t) \ - ( t >= 0 && t <= sizeof(GenericTrap)/sizeof(GenericTrap[0]) \ - ? GenericTrap[t] : (sprintf(buf, "gt=%d", t), buf)) - -/* - * ASN.1 type class table - * Ties together the preceding Universal, Application, Context, and Private - * type definitions. - */ -#define defineCLASS(x) { "x", x, sizeof(x)/sizeof(x[0]) } /* not ANSI-C */ -struct { - char *name; - char **Id; - int numIDs; -} Class[] = { - defineCLASS(Universal), -#define UNIVERSAL 0 - defineCLASS(Application), -#define APPLICATION 1 - defineCLASS(Context), -#define CONTEXT 2 - defineCLASS(Private), -#define PRIVATE 3 -}; - -/* - * defined forms for ASN.1 types - */ -char *Form[] = { - "Primitive", -#define PRIMITIVE 0 - "Constructed", -#define CONSTRUCTED 1 -}; - -/* - * A structure for the OID tree for the compiled-in MIB. - * This is stored as a general-order tree. - */ -struct obj { - 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 */ -} *objp = NULL; - -/* - * Include the compiled in SNMP MIB. "mib.h" is produced by feeding - * RFC-1156 format files into "makemib". "mib.h" MUST define at least - * a value for `mibroot'. - * - * In particular, this is gross, as this is including initialized structures, - * and by right shouldn't be an "include" file. - */ -#include "mib.h" - -/* - * This defines a list of OIDs which will be abbreviated on output. - * Currently, this includes the prefixes for the Internet MIB, the - * private enterprises tree, and the experimental tree. - */ -struct obj_abrev { - char *prefix; /* prefix for this abrev */ - struct obj *node; /* pointer into object table */ - char *oid; /* ASN.1 encoded OID */ -} obj_abrev_list[] = { -#ifndef NO_ABREV_MIB - /* .iso.org.dod.internet.mgmt.mib */ - { "", &_mib_obj, "\53\6\1\2\1" }, -#endif -#ifndef NO_ABREV_ENTER - /* .iso.org.dod.internet.private.enterprises */ - { "E:", &_enterprises_obj, "\53\6\1\4\1" }, -#endif -#ifndef NO_ABREV_EXPERI - /* .iso.org.dod.internet.experimental */ - { "X:", &_experimental_obj, "\53\6\1\3" }, -#endif - { 0,0,0 } -}; - -/* - * This is used in the OID print routine to walk down the object tree - * rooted at `mibroot'. - */ -#define OBJ_PRINT(o, suppressdot) \ -{ \ - if (objp) { \ - do { \ - if ((o) == objp->oid) \ - break; \ - } while ((objp = objp->next) != NULL); \ - } \ - if (objp) { \ - printf(suppressdot?"%s":".%s", objp->desc); \ - objp = objp->child; \ - } else \ - printf(suppressdot?"%u":".%u", (o)); \ -} - -/* - * This is the definition for the Any-Data-Type storage used purely for - * temporary internal representation while decoding an ASN.1 data stream. - */ -struct be { - u_long asnlen; - union { - caddr_t raw; - long integer; - u_long uns; - const u_char *str; - } data; - u_char form, class, id; /* tag info */ - u_char type; -#define BE_ANY 255 -#define BE_NONE 0 -#define BE_NULL 1 -#define BE_OCTET 2 -#define BE_OID 3 -#define BE_INT 4 -#define BE_UNS 5 -#define BE_STR 6 -#define BE_SEQ 7 -#define BE_INETADDR 8 -#define BE_PDU 9 -}; - -/* - * Defaults for SNMP PDU components - */ -#define DEF_COMMUNITY "public" -#define DEF_VERSION 0 - -/* - * constants for ASN.1 decoding - */ -#define OIDMUX 40 -#define ASNLEN_INETADDR 4 -#define ASN_SHIFT7 7 -#define ASN_SHIFT8 8 -#define ASN_BIT8 0x80 -#define ASN_LONGLEN 0x80 - -#define ASN_ID_BITS 0x1f -#define ASN_FORM_BITS 0x20 -#define ASN_FORM_SHIFT 5 -#define ASN_CLASS_BITS 0xc0 -#define ASN_CLASS_SHIFT 6 - -#define ASN_ID_EXT 0x1f /* extension ID in tag field */ - -/* - * truncated==1 means the packet was complete, but we don't have all of - * it to decode. - */ -static int truncated; -#define ifNotTruncated if (truncated) fputs("[|snmp]", stdout); else - -/* - * This decodes the next ASN.1 object in the stream pointed to by "p" - * (and of real-length "len") and stores the intermediate data in the - * provided BE object. - * - * This returns -l if it fails (i.e., the ASN.1 stream is not valid). - * O/w, this returns the number of bytes parsed from "p". - */ -static int -asn1_parse(register const u_char *p, int len, struct be *elem) -{ - u_char form, class, id; - int i, hdr; - - elem->asnlen = 0; - elem->type = BE_ANY; - if (len < 1) { - ifNotTruncated puts("[nothing to parse], stdout"); - return -1; - } - - /* - * it would be nice to use a bit field, but you can't depend on them. - * +---+---+---+---+---+---+---+---+ - * + class |frm| id | - * +---+---+---+---+---+---+---+---+ - * 7 6 5 4 3 2 1 0 - */ - id = *p & ASN_ID_BITS; /* lower 5 bits, range 00-1f */ -#ifdef notdef - form = (*p & 0xe0) >> 5; /* move upper 3 bits to lower 3 */ - class = form >> 1; /* bits 7&6 -> bits 1&0, range 0-3 */ - form &= 0x1; /* bit 5 -> bit 0, range 0-1 */ -#else - form = (*p & ASN_FORM_BITS) >> ASN_FORM_SHIFT; - class = (*p & ASN_CLASS_BITS) >> ASN_CLASS_SHIFT; -#endif - 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); - id += *p & ~ASN_BIT8; - } - if (len == 0 && *p & ASN_BIT8) { - ifNotTruncated fputs("[Xtagfield?]", stdout); - return -1; - } - } - if (len < 1) { - ifNotTruncated fputs("[no asnlen]", stdout); - return -1; - } - elem->asnlen = *p; - if (vflag) - printf("|%.2x", *p); - p++; len--; hdr++; - if (elem->asnlen & ASN_BIT8) { - int 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); - elem->asnlen = (elem->asnlen << ASN_SHIFT8) | *p++; - } - } - if (len < elem->asnlen) { - if (!truncated) { - printf("[len%d<asnlen%u]", len, elem->asnlen); - return -1; - } - /* maybe should check at least 4? */ - elem->asnlen = len; - } - if (form >= sizeof(Form)/sizeof(Form[0])) { - ifNotTruncated printf("[form?%d]", form); - return -1; - } - if (class >= sizeof(Class)/sizeof(Class[0])) { - ifNotTruncated printf("[class?%c/%d]", *Form[form], class); - return -1; - } - if (id >= Class[class].numIDs) { - ifNotTruncated printf("[id?%c/%s/%d]", *Form[form], - Class[class].name, id); - return -1; - } - - switch (form) { - case PRIMITIVE: - switch (class) { - case UNIVERSAL: - switch (id) { - case STRING: - elem->type = BE_STR; - elem->data.str = p; - break; - - case INTEGER: { - register long data; - elem->type = BE_INT; - data = 0; - - if (*p & ASN_BIT8) /* negative */ - data = -1; - for (i = elem->asnlen; i-- > 0; p++) - data = (data << ASN_SHIFT8) | *p; - elem->data.integer = data; - break; - } - - case OBJECTID: - elem->type = BE_OID; - elem->data.raw = (caddr_t)p; - break; - - case ASN_NULL: - elem->type = BE_NULL; - elem->data.raw = NULL; - break; - - default: - elem->type = BE_OCTET; - elem->data.raw = (caddr_t)p; - printf("[P/U/%s]", - Class[class].Id[id]); - break; - } - break; - - case APPLICATION: - switch (id) { - case IPADDR: - elem->type = BE_INETADDR; - elem->data.raw = (caddr_t)p; - break; - - case COUNTER: - case GAUGE: - case TIMETICKS: { - register u_long data; - elem->type = BE_UNS; - data = 0; - for (i = elem->asnlen; i-- > 0; p++) - data = (data << 8) + *p; - elem->data.uns = data; - break; - } - - default: - elem->type = BE_OCTET; - elem->data.raw = (caddr_t)p; - printf("[P/A/%s]", - Class[class].Id[id]); - break; - } - break; - - default: - elem->type = BE_OCTET; - elem->data.raw = (caddr_t)p; - printf("[P/%s/%s]", - Class[class].name, Class[class].Id[id]); - break; - } - break; - - case CONSTRUCTED: - switch (class) { - case UNIVERSAL: - switch (id) { - case SEQUENCE: - elem->type = BE_SEQ; - elem->data.raw = (caddr_t)p; - break; - - default: - elem->type = BE_OCTET; - elem->data.raw = (caddr_t)p; - printf("C/U/%s", Class[class].Id[id]); - break; - } - break; - - case CONTEXT: - elem->type = BE_PDU; - elem->data.raw = (caddr_t)p; - break; - - default: - elem->type = BE_OCTET; - elem->data.raw = (caddr_t)p; - printf("C/%s/%s", - Class[class].name, Class[class].Id[id]); - break; - } - break; - } - p += elem->asnlen; - len -= elem->asnlen; - return elem->asnlen + hdr; -} - -/* - * Display the ASN.1 object represented by the BE object. - * This used to be an integral part of asn1_parse() before the intermediate - * BE form was added. - */ -static void -asn1_print(struct be *elem) -{ - u_char *p = (u_char *)elem->data.raw; - u_long asnlen = elem->asnlen; - int i; - - switch (elem->type) { - - case BE_OCTET: - for (i = asnlen; i-- > 0; p++); - printf("_%.2x", *p); - break; - - case BE_NULL: - break; - - case BE_OID: { - int o = 0, first = -1, i = asnlen; - - if (!nflag && asnlen > 2) { - struct obj_abrev *a = &obj_abrev_list[0]; - for (; a->node; a++) { - if (!bcmp(a->oid, (char *)p, strlen(a->oid))) { - objp = a->node->child; - i -= strlen(a->oid); - p += strlen(a->oid); - fputs(a->prefix, stdout); - first = 1; - break; - } - } - } - for (; 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) { - if (!nflag) - objp = mibroot; - first = 0; - OBJ_PRINT(o/OIDMUX, first); - o %= OIDMUX; - } - OBJ_PRINT(o, first); - if (--first < 0) - first = 0; - o = 0; - } - break; - } - - case BE_INT: - printf("%ld", elem->data.integer); - break; - - case BE_UNS: - printf("%ld", elem->data.uns); - break; - - case BE_STR: { - register int printable = 1, first = 1; - const u_char *p = elem->data.str; - for (i = asnlen; printable && i-- > 0; p++) - printable = isprint(*p) || isspace(*p); - p = elem->data.str; - if (printable) - (void)fn_print(p, p + asnlen); - else - for (i = asnlen; i-- > 0; p++) { - printf(first ? "%.2x" : "_%.2x", *p); - first = 0; - } - break; - } - - case BE_SEQ: - printf("Seq(%d)", elem->asnlen); - break; - - case BE_INETADDR: { - char sep; - if (asnlen != ASNLEN_INETADDR) - printf("[inetaddr len!=%d]", ASNLEN_INETADDR); - sep='['; - for (i = asnlen; i-- > 0; p++) { - printf("%c%u", sep, *p); - sep='.'; - } - putchar(']'); - break; - } - - case BE_PDU: - printf("%s(%d)", - Class[CONTEXT].Id[elem->id], elem->asnlen); - break; - - case BE_ANY: - fputs("[BE_ANY!?]", stdout); - break; - - default: - fputs("[be!?]", stdout); - break; - } -} - -#ifdef notdef -/* - * This is a brute force ASN.1 printer: recurses to dump an entire structure. - * This will work for any ASN.1 stream, not just an SNMP PDU. - * - * By adding newlines and spaces at the correct places, this would print in - * Rose-Normal-Form. - * - * This is not currently used. - */ -static void -asn1_decode(u_char *p, int length) -{ - struct be elem; - int i = 0; - - while (i >= 0 && length > 0) { - i = asn1_parse(p, length, &elem); - if (i >= 0) { - fputs(" ", stdout); - asn1_print(&elem); - if (elem.type == BE_SEQ || elem.type == BE_PDU) { - fputs(" {", stdout); - asn1_decode(elem.data.raw, elem.asnlen); - fputs(" }", stdout); - } - length -= i; - p += i; - } - } -} -#endif - -/* - * General SNMP header - * SEQUENCE { - * version INTEGER {version-1(0)}, - * community OCTET STRING, - * data ANY -- PDUs - * } - * PDUs for all but Trap: (see rfc1157 from page 15 on) - * SEQUENCE { - * request-id INTEGER, - * error-status INTEGER, - * error-index INTEGER, - * varbindlist SEQUENCE OF - * SEQUENCE { - * name ObjectName, - * value ObjectValue - * } - * } - * PDU for Trap: - * SEQUENCE { - * enterprise OBJECT IDENTIFIER, - * agent-addr NetworkAddress, - * generic-trap INTEGER, - * specific-trap INTEGER, - * time-stamp TimeTicks, - * varbindlist SEQUENCE OF - * SEQUENCE { - * name ObjectName, - * value ObjectValue - * } - * } - */ - -/* - * Decode SNMP varBind - */ -static void -varbind_print(u_char pduid, const u_char *np, int length, int error) -{ - struct be elem; - int count = 0, ind; - - /* Sequence of varBind */ - if ((count = asn1_parse(np, length, &elem)) < 0) - return; - if (elem.type != BE_SEQ) { - fputs("[!SEQ of varbind]", stdout); - asn1_print(&elem); - return; - } - if (count < length) - printf("[%d extra after SEQ of varbind]", length - count); - /* descend */ - length = elem.asnlen; - np = (u_char *)elem.data.raw; - - for (ind = 1; length > 0; ind++) { - const u_char *vbend; - int vblength; - - if (!error || ind == error) - fputs(" ", stdout); - - /* Sequence */ - if ((count = asn1_parse(np, length, &elem)) < 0) - return; - if (elem.type != BE_SEQ) { - fputs("[!varbind]", stdout); - asn1_print(&elem); - return; - } - vbend = np + count; - vblength = length - count; - /* descend */ - length = elem.asnlen; - np = (u_char *)elem.data.raw; - - /* objName (OID) */ - if ((count = asn1_parse(np, length, &elem)) < 0) - return; - if (elem.type != BE_OID) { - fputs("[objName!=OID]", stdout); - asn1_print(&elem); - return; - } - if (!error || ind == error) - asn1_print(&elem); - length -= count; - np += count; - - if (pduid != GETREQ && pduid != GETNEXTREQ && !error) - fputs("=", stdout); - - /* objVal (ANY) */ - if ((count = asn1_parse(np, length, &elem)) < 0) - return; - if (pduid == GETREQ || pduid == GETNEXTREQ) { - 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) - asn1_print(&elem); - - length = vblength; - np = vbend; - } -} - -/* - * Decode SNMP PDUs: GetRequest, GetNextRequest, GetResponse, and SetRequest - */ -static void -snmppdu_print(u_char pduid, const u_char *np, int length) -{ - struct be elem; - int count = 0, error; - - /* reqId (Integer) */ - if ((count = asn1_parse(np, length, &elem)) < 0) - return; - if (elem.type != BE_INT) { - fputs("[reqId!=INT]", stdout); - asn1_print(&elem); - return; - } - /* ignore the reqId */ - length -= count; - np += count; - - /* errorStatus (Integer) */ - if ((count = asn1_parse(np, length, &elem)) < 0) - return; - if (elem.type != BE_INT) { - fputs("[errorStatus!=INT]", stdout); - asn1_print(&elem); - return; - } - error = 0; - if ((pduid == GETREQ || pduid == GETNEXTREQ) - && elem.data.integer != 0) { - char errbuf[10]; - printf("[errorStatus(%s)!=0]", - DECODE_ErrorStatus(elem.data.integer)); - } else if (elem.data.integer != 0) { - char errbuf[10]; - printf(" %s", DECODE_ErrorStatus(elem.data.integer)); - error = elem.data.integer; - } - length -= count; - np += count; - - /* errorIndex (Integer) */ - if ((count = asn1_parse(np, length, &elem)) < 0) - return; - if (elem.type != BE_INT) { - fputs("[errorIndex!=INT]", stdout); - asn1_print(&elem); - return; - } - if ((pduid == GETREQ || pduid == GETNEXTREQ) - && elem.data.integer != 0) - printf("[errorIndex(%d)!=0]", elem.data.integer); - else if (elem.data.integer != 0) { - if (!error) - printf("[errorIndex(%d) w/o errorStatus]", - elem.data.integer); - else { - printf("@%d", elem.data.integer); - error = elem.data.integer; - } - } else if (error) { - fputs("[errorIndex==0]", stdout); - error = 0; - } - length -= count; - np += count; - - varbind_print(pduid, np, length, error); - return; -} - -/* - * Decode SNMP Trap PDU - */ -static void -trap_print(const u_char *np, int length) -{ - struct be elem; - int count = 0, generic; - - putchar(' '); - - /* enterprise (oid) */ - if ((count = asn1_parse(np, length, &elem)) < 0) - return; - if (elem.type != BE_OID) { - fputs("[enterprise!=OID]", stdout); - asn1_print(&elem); - return; - } - asn1_print(&elem); - length -= count; - np += count; - - putchar(' '); - - /* agent-addr (inetaddr) */ - if ((count = asn1_parse(np, length, &elem)) < 0) - return; - if (elem.type != BE_INETADDR) { - fputs("[agent-addr!=INETADDR]", stdout); - asn1_print(&elem); - return; - } - asn1_print(&elem); - length -= count; - np += count; - - /* generic-trap (Integer) */ - if ((count = asn1_parse(np, length, &elem)) < 0) - return; - if (elem.type != BE_INT) { - fputs("[generic-trap!=INT]", stdout); - asn1_print(&elem); - return; - } - generic = elem.data.integer; - { - char buf[10]; - printf(" %s", DECODE_GenericTrap(generic)); - } - length -= count; - np += count; - - /* specific-trap (Integer) */ - if ((count = asn1_parse(np, length, &elem)) < 0) - return; - if (elem.type != BE_INT) { - fputs("[specific-trap!=INT]", stdout); - asn1_print(&elem); - return; - } - if (generic != GT_ENTERPRISE) { - if (elem.data.integer != 0) - printf("[specific-trap(%d)!=0]", elem.data.integer); - } else - printf(" s=%d", elem.data.integer); - length -= count; - np += count; - - putchar(' '); - - /* time-stamp (TimeTicks) */ - if ((count = asn1_parse(np, length, &elem)) < 0) - return; - if (elem.type != BE_UNS) { /* XXX */ - fputs("[time-stamp!=TIMETICKS]", stdout); - asn1_print(&elem); - return; - } - asn1_print(&elem); - length -= count; - np += count; - - varbind_print (TRAP, np, length, 0); - return; -} - -/* - * Decode SNMP header and pass on to PDU printing routines - */ -void -snmp_print(const u_char *np, int length) -{ - struct be elem, pdu; - int count = 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 (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; - } - /* only handle version==0 */ - if (elem.data.integer != DEF_VERSION) { - printf("[version(%d)!=0]", elem.data.integer); - return; - } - length -= count; - np += count; - - /* Community (String) */ - if ((count = asn1_parse(np, length, &elem)) < 0) - return; - if (elem.type != BE_STR) { - fputs("[comm!=STR]", stdout); - asn1_print(&elem); - return; - } - /* default community */ - if (strncmp((char *)elem.data.str, DEF_COMMUNITY, - sizeof(DEF_COMMUNITY) - 1)) - /* ! "public" */ - printf("C=%.*s ", (int)elem.asnlen, elem.data.str); - length -= count; - np += count; - - /* PDU (Context) */ - if ((count = asn1_parse(np, length, &pdu)) < 0) - return; - if (pdu.type != BE_PDU) { - fputs("[no PDU]", stdout); - 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; - - switch (pdu.id) { - case TRAP: - trap_print(np, length); - break; - case GETREQ: - case GETNEXTREQ: - case GETRESP: - case SETREQ: - snmppdu_print(pdu.id, np, length); - break; - } - return; -} |
