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wireshark/plugins/asn1/packet-asn1.c

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/******************************************************************************************************/
/* packet-asn1.c
*
* Copyright (c) 2003 by Matthijs Melchior <matthijs.melchior@xs4all.nl>
*
* $Id$
*
* A plugin for:
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1999 Gerald Combs
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/**************************************************************************
* This plugin will dissect BER encoded ASN.1 messages in UDP packets or in
* a TCP stream. It relies on wireshark to do defragmentation and re-assembly
* to construct complete messages.
*
* To produce packet display with good annotations it needs to know about
* the ASN.1 definition of the messages it reads. To this end, it can read
* the 'type-table' output file of the ASN.1 to C compiler 'snacc'. The
* version I have used came from: http://packages.debian.org/testing/devel/snacc.html
*
* The type-table files produced by snacc are themselves ASN.1 BER encoded
* data structures. Knowledge of the structure of that table, as specified
* in the tbl.asn1 file in the snacc distribution, is hand coded in some
* functions in this plugin.
*
* This also means that this dissector can show its own specification.
* On a unix machine, do the following to see this in action:
* - cd /tmp
* - snacc -u /usr/include/snacc/asn1/asn-useful.asn1 -T tbl.tt /usr/include/snacc/asn1/tbl.asn1
* - od -Ax -tx1 tbl.tt | text2pcap -T 801,801 - tbl.tt.pcap
* - wireshark tbl.tt.pcap
* GUI: Edit->Preferences->Protocols->ASN1
* type table file: /tmp/tbl.tt
* PDU name: TBL
* [OK]
* you can now browse the tbl.tt definition.
*
*/
/* Include files */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <sys/types.h>
#include <sys/stat.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <time.h>
#include <string.h>
#include <glib.h>
#include <glib/gprintf.h>
#include <epan/packet.h>
#include <epan/addr_resolv.h>
#include <epan/prefs.h>
#include <epan/strutil.h>
#include <epan/filesystem.h>
#include <epan/report_err.h>
#include <epan/emem.h>
#include <epan/dissectors/packet-tcp.h>
#include <epan/oids.h>
#include <plugins/asn1/asn1.h>
#include <wsutil/file_util.h>
#ifdef DISSECTOR_WITH_GUI
#include <gtk/gtk.h>
#endif
#include <epan/ipproto.h>
/* buffer lengths */
#define BUFLS 32
#define BUFLM 64
#define BUFLL 128
/* Define default ports */
#define TCP_PORT_ASN1 0
#define UDP_PORT_ASN1 0
#define SCTP_PORT_ASN1 0
void proto_reg_handoff_asn1(void);
/* Define the asn1 proto */
static int proto_asn1 = -1;
/* Define the tree for asn1*/
static int ett_asn1 = -1;
#define MAXPDU 64 /* max # PDU's in one packet */
static int ett_pdu[MAXPDU];
#define MAX_NEST 32 /* max nesting level for ASN.1 elements */
static int ett_seq[MAX_NEST];
/*
* Global variables associated with the preferences for asn1
*/
#ifdef JUST_ONE_PORT
static guint global_tcp_port_asn1 = TCP_PORT_ASN1;
static guint global_udp_port_asn1 = UDP_PORT_ASN1;
static guint global_sctp_port_asn1 = SCTP_PORT_ASN1;
static guint tcp_port_asn1 = TCP_PORT_ASN1;
static guint udp_port_asn1 = UDP_PORT_ASN1;
static guint sctp_port_asn1 = SCTP_PORT_ASN1;
#else
static range_t *global_tcp_ports_asn1;
static range_t *global_udp_ports_asn1;
static range_t *global_sctp_ports_asn1;
static range_t *tcp_ports_asn1;
static range_t *udp_ports_asn1;
static range_t *sctp_ports_asn1;
#endif /* JUST_ONE_PORT */
static gboolean asn1_desegment = TRUE;
static const char *asn1_filename = NULL;
static char *old_default_asn1_filename = NULL;
#define OLD_DEFAULT_ASN1FILE "asn1" G_DIR_SEPARATOR_S "default.tt"
#ifdef _WIN32
#define BAD_SEPARATOR_OLD_DEFAULT_ASN1FILE "asn1/default.tt"
static char *bad_separator_old_default_asn1_filename = NULL;
#endif
static char *current_asn1 = NULL;
static const char *asn1_pduname = NULL;
static char *current_pduname = NULL;
static gboolean asn1_debug = FALSE;
static guint first_pdu_offset = 0;
static gboolean asn1_message_win = FALSE;
static gboolean asn1_verbose = FALSE; /* change to TRUE for logging the startup phase */
static gboolean asn1_full = FALSE; /* show full names */
static guint type_recursion_level = 1; /* eliminate 1 level of references */
static char *asn1_logfile = NULL;
#define ASN1LOGFILE "wireshark.log"
/* PDU counter, for correlation between GUI display and log file in debug mode */
static int pcount = 0;
static tvbuff_t *asn1_desc; /* the PDU description */
static GNode *asn1_nodes = NULL; /* GNode tree pointing to every asn1 data element */
static GNode *data_nodes = NULL; /* GNode tree describing the syntax data */
static GNode *PDUtree = NULL; /* GNode tree describing the expected PDU format */
static guint PDUerrcount = 0; /* count of parse errors in one ASN.1 message */
#define NEL(x) (sizeof(x)/sizeof(*x)) /* # elements in static array */
static char pabbrev[] = "asn1"; /* field prefix */
static char fieldname[512]; /* for constructing full names */
static guint pabbrev_pdu_len; /* length initial part of fieldname with 'abbrev.asn1pdu.' */
/*
* Text strings describing the standard, universal, ASN.1 names.
*/
#define ASN1_EOI 4 /* this is in the class number space... */
#define ASN1_BEG 2 /* to be merged with constructed flag, first entry in sequence */
static const char tag_class[] = "UACPX";
static const char *asn1_cls[] = { "Universal", "Application", "Context", "Private" };
static const char *asn1_con[] = { "Primitive", "Constructed" };
static const char *asn1_tag[] = {
/* 0 */ "EOC", "Boolean", "Integer", "BitString",
/* 4 */ "OctetString", "Null", "ObjectIdentifier", "ObjectDescriptor",
/* 8 */ "External", "Real", "Enumerated", "tag11",
/* 12 */ "UTF8String", "tag13", "tag14", "tag15",
/* 16 */ "Sequence", "Set", "NumericString", "PrintableString",
/* 20 */ "TeletexString", "VideotexString", "IA5String", "UTCTime",
/* 24 */ "GeneralTime", "GraphicString", "ISO646String", "GeneralString",
/* 28 */ "UniversalString", "tag29", "BMPString", "Long tag prefix"
/* TT61 == TELETEX */
/* ISO646 == VISIBLE*/
};
/* type names used in the output of the snacc ASN.1 compiler, the TBLTypeId enum */
static gboolean tbl_types_verified = FALSE;
typedef enum { /* copied from .../snacc/c-lib/boot/tbl.h */
TBL_BOOLEAN = 0,
TBL_INTEGER = 1,
TBL_BITSTRING = 2,
TBL_OCTETSTRING = 3,
TBL_NULL = 4,
TBL_OID = 5,
TBL_REAL = 6,
TBL_ENUMERATED = 7,
TBL__SIMPLE = 8, /* values smaller than this can have a value */
TBL_SEQUENCE = 8,
TBL_SET = 9,
TBL_SEQUENCEOF = 10,
TBL_SETOF = 11,
TBL_CHOICE = 12,
TBL_TYPEREF = 13,
TBL_SEQUENCEOF_start, /* to mark potential sequence-of repeat */
TBL_TYPEREF_nopop, /* typeref has been handled immediately */
TBL_CHOICE_done, /* choice is finished */
TBL_reserved, /* this sequence has been visited */
TBL_CHOICE_immediate, /* immediate choice, no next */
TBL_INVALID /* incorrect value for this enum */
} TBLTypeId;
/* Universal tags mapped to snacc ASN.1 table types */
static int asn1_uni_type[] = {
/* 0 */ TBL_INVALID, TBL_BOOLEAN, TBL_INTEGER, TBL_BITSTRING,
/* 4 */ TBL_OCTETSTRING, TBL_NULL, TBL_OID, TBL_INVALID,
/* 8 */ TBL_INVALID, TBL_REAL, TBL_ENUMERATED, TBL_INVALID,
/* 12 */ TBL_OCTETSTRING, TBL_INVALID, TBL_INVALID, TBL_INVALID,
/* 16 */ TBL_SEQUENCE, TBL_SET, TBL_OCTETSTRING, TBL_OCTETSTRING,
/* 20 */ TBL_OCTETSTRING, TBL_OCTETSTRING, TBL_OCTETSTRING, TBL_OCTETSTRING,
/* 24 */ TBL_OCTETSTRING, TBL_OCTETSTRING, TBL_OCTETSTRING, TBL_OCTETSTRING,
/* 28 */ TBL_OCTETSTRING, TBL_INVALID, TBL_OCTETSTRING, TBL_INVALID,
};
#define TBL_REPEAT 0x00010000 /* This type may be repeated, a flag in word TBLTypeId */
#define TBL_REPEAT_choice 0x00020000 /* repeating a choice */
#define TBL_CHOICE_made 0x00040000 /* This was a choice entry */
#define TBL_SEQUENCE_done 0x00080000 /* children have been processed */
#define TBL_CHOICE_repeat 0x00100000 /* a repeating choice */
#define TBL_REFERENCE 0x00200000 /* This entry is result of a typeref */
#define TBL_REFERENCE_pop 0x00400000 /* reference handled, do pop i.s.o. next */
#define TBL_SEQUENCE_choice 0x00800000 /* this sequence is a first of a repeating choice */
#define TBL_CONSTRUCTED 0x01000000 /* unexpectedly constructed entry */
#define TBL_TYPEmask 0x0000FFFF /* Mask just the type */
/* XXX - Should we use val_to_str here? */
#define TBLTYPE(x) (tbl_types[x&TBL_TYPEmask])
/* text tables for debugging and GUI */
static const char *tbl_types[] = {
/* 0 */ "tbl-boolean",
/* 1 */ "tbl-integer",
/* 2 */ "tbl-bitstring",
/* 2 */ "tbl-octetstring",
/* 4 */ "tbl-null",
/* 5 */ "tbl-oid",
/* 6 */ "tbl-real",
/* 7 */ "tbl-enumerated",
/* 8 */ "tbl-sequence",
/* 9 */ "tbl-set",
/* 10 */ "tbl-sequenceof",
/* 11 */ "tbl-setof",
/* 12 */ "tbl-choice",
/* 13 */ "tbl-typeref",
/* 14 */ "tbl-sequenceof-start",
/* 15 */ "tbl-typeref-nopop",
/* 16 */ "tbl-choice-done",
/* 17 */ "tbl-reserved",
/* 18 */ "tbl-choice-immediate",
/* 19 */ "tbl-invalid",
};
static const char *tbl_types_asn1[] = {
/* 0 */ "BOOLEAN",
/* 1 */ "INTEGER",
/* 2 */ "BITSTRING",
/* 2 */ "OCTET STRING",
/* 4 */ "NULL",
/* 5 */ "OBJECT IDENTIFIER",
/* 6 */ "REAL",
/* 7 */ "ENUMERATED",
/* 8 */ "SEQUENCE",
/* 9 */ "SET",
/* 10 */ "SEQUENCE OF",
/* 11 */ "SET OF",
/* 12 */ "CHOICE",
/* 13 */ "TYPEREF",
/* 14 */ "start-SEQUENCE OF",
/* 15 */ "TYPEREF nopop",
/* 16 */ "CHOICE done",
/* 17 */ "Reserved",
/* 18 */ "CHOICE immediate",
/* 19 */ "INVALID entry",
};
/* conversion from snacc type to appropriate wireshark type */
static guint tbl_types_wireshark[] = {
/* 0 */ FT_BOOLEAN, /* TBL_BOOLEAN */
/* 1 */ FT_UINT32, /* TBL_INTEGER */
/* 2 */ FT_UINT32, /* TBL_BITSTRING */
/* 2 */ FT_STRINGZ, /* TBL_OCTETSTRING */
/* 4 */ FT_NONE, /* TBL_NULL */
/* 5 */ FT_BYTES, /* TBL_OID */
/* 6 */ FT_DOUBLE, /* TBL_REAL */
/* 7 */ FT_UINT32, /* TBL_ENUMERATED */
/* 8 */ FT_NONE, /* TBL_SEQUENCE */
/* 9 */ FT_NONE, /* TBL_SET */
/* 10 */ FT_NONE, /* TBL_SEQUENCEOF */
/* 11 */ FT_NONE, /* TBL_SETOF */
/* 12 */ FT_NONE, /* TBL_CHOICE */
/* 13 */ FT_NONE, /* TBL_TYPEREF */
/* 14 */ FT_NONE, /* TBL_SEQUENCEOF_start */
/* 15 */ FT_NONE, /* TBL_TYPEREF_nopop */
/* 16 */ FT_NONE, /* TBL_CHOICE_done */
/* 17 */ FT_NONE, /* TBL_reserved */
/* 18 */ FT_NONE, /* TBL_CHOICE_immediate */
/* 19 */ FT_NONE, /* TBL_INVALID */
};
static const char *tbl_types_wireshark_txt[] = {
/* 0 */ "FT_BOOLEAN", /* TBL_BOOLEAN */
/* 1 */ "FT_UINT32", /* TBL_INTEGER */
/* 2 */ "FT_UINT32", /* TBL_BITSTRING */
/* 2 */ "FT_STRINGZ", /* TBL_OCTETSTRING */
/* 4 */ "FT_NONE", /* TBL_NULL */
/* 5 */ "FT_BYTES", /* TBL_OID */
/* 6 */ "FT_DOUBLE", /* TBL_REAL */
/* 7 */ "FT_UINT32", /* TBL_ENUMERATED */
/* 8 */ "FT_NONE", /* TBL_SEQUENCE */
/* 9 */ "FT_NONE", /* TBL_SET */
/* 10 */ "FT_NONE", /* TBL_SEQUENCEOF */
/* 11 */ "FT_NONE", /* TBL_SETOF */
/* 12 */ "FT_NONE", /* TBL_CHOICE */
/* 13 */ "FT_NONE", /* TBL_TYPEREF */
/* 14 */ "FT_NONE", /* TBL_SEQUENCEOF_start */
/* 15 */ "FT_NONE", /* TBL_TYPEREF_nopop */
/* 16 */ "FT_NONE", /* TBL_CHOICE_done */
/* 17 */ "FT_NONE", /* TBL_reserved */
/* 18 */ "FT_NONE", /* TBL_CHOICE_immediate */
/* 19 */ "FT_NONE", /* TBL_INVALID */
};
typedef struct _PDUinfo PDUinfo;
struct _PDUinfo {
guint type;
const char *name;
const char *typename;
const char *fullname;
guchar tclass;
guint tag;
guint flags;
GNode *reference;
gint typenum;
gint basetype; /* parent type */
gint mytype; /* original type number, typenum may have gone through a reference */
gint value_id; /* wireshark field id for the value in this PDU */
gint type_id; /* wireshark field id for the type of this PDU */
hf_register_info value_hf; /* wireshark field info for this value */
};
/* bits in the flags collection */
#define PDU_OPTIONAL 1
#define PDU_IMPLICIT 2
#define PDU_NAMEDNUM 4
#define PDU_REFERENCE 8
#define PDU_TYPEDEF 0x10
#define PDU_ANONYMOUS 0x20
#define PDU_TYPETREE 0x40
#define PDU_CHOICE 0x08000000 /* manipulated by the PDUname routine */
static guint PDUinfo_initflags = 0; /* default flags for newly allocated PDUinfo structs */
/* description of PDU properties as passed from the matching routine
* to the decoder and GUI.
*/
typedef struct _PDUprops PDUprops;
struct _PDUprops {
guint type; /* value from enum TBLTypeId */
const char *name;
const char *typename;
const char *fullname;
guint flags;
gpointer data;
gint value_id;
gint type_id;
};
/* flags defined in PDUprops.flags */
#define OUT_FLAG_type 1
#define OUT_FLAG_data 2
#define OUT_FLAG_typename 4
#define OUT_FLAG_dontshow 8
#define OUT_FLAG_noname 0x10
#define OUT_FLAG_constructed 0x20
static PDUprops *getPDUprops(PDUprops *out, guint offset, guint class, guint tag, guint cons);
static const char *getPDUenum(PDUprops *props, guint offset, guint cls, guint tag, guint value);
static const char empty[] = ""; /* address of the empt string, avoids many tests for NULL */
#define MAX_OTSLEN 256 /* max printed size for an octet string */
#undef NEST /* show nesting of asn.1 enties */
#ifdef NEST /* only for debugging */
/* show nesting, only for debugging... */
#define MAXTAGS MAX_NEST
static struct {
guchar cls;
guchar tag;
} taglist[MAXTAGS];
static char *showtaglist(guint level)
{
static char tagtxt[BUFLM];
char *p = tagtxt;
guint i;
#ifdef ALLTAGS
for(i=0; i<= level; i++) {
switch(taglist[i].cls) {
case BER_CLASS_UNI: *p++ = 'U'; break;
case BER_CLASS_APP: *p++ = 'A'; break;
case BER_CLASS_CON: *p++ = 'C'; break;
case BER_CLASS_PRI: *p++ = 'P'; break;
default: *p++ = 'x'; break;
}
p += g_sprintf(p, "%d.", taglist[i].tag);
}
#else /* only context tags */
*p++ = 'C';
for(i=0; i<= level; i++) {
if (taglist[i].cls == BER_CLASS_CON) {
p += g_sprintf(p, "%d.", taglist[i].tag);
}
}
#endif
*--p = 0; /* remove trailing '.' */
return tagtxt;
}
static guint
get_context(guint level)
{
guint ctx = 0;
guint i;
for(i=0; i<=level; i++) {
if (taglist[i].cls == BER_CLASS_CON)
ctx = (ctx << 8) | taglist[i].tag;
}
return ctx;
}
#endif /* NEST, only for debugging */
/* Convert a bit string to an ascii representation for printing
* -- not thread safe ...
*/
static const char *showbits(guchar *val, guint count)
{
static char str[BUFLM];
guint i;
char *p = str;
if (count > 32)
return "*too many bits*";
if (val != 0) {
for(i=0; i<count; i++) {
if (i && ((i & 7) == 0)) *p++ = ' ';
*p++ = (val[i>>3] & (0x80 >> (i & 7))) ? '1' : '0';
}
}
*p = 0;
return str;
}
/* get bitnames string for bits set */
static const char *
showbitnames(guchar *val, guint count, PDUprops *props, guint offset)
{
static char str[BUFLL];
guint i;
char *p = str;
if (props->flags & OUT_FLAG_noname)
return empty;
if (count > 32)
return "*too many bits, no names...*";
if (val != NULL) {
for(i=0; i<count; i++) {
if (val[i>>3] & (0x80 >> (i & 7))) { /* bit i is set */
p += g_sprintf(p,"%s,", getPDUenum(props, offset, 0, 0, i));
}
}
if (p > str)
--p; /* remove terminating , */
}
*p = 0;
return str;
}
/* Convert an oid to its conventional text representation
* -- not thread safe...
*/
static char *showoid(subid_t *oid, guint len)
{
static char str[BUFLM];
guint i;
char *p = str;
if (oid != NULL) {
for(i=0; i<len; i++) {
if (i) *p++ = '.';
p += g_sprintf(p, "%lu", (unsigned long)oid[i]);
}
}
*p = 0;
return str;
}
/* show octetstring, if all ascii, show that, else hex [returnrd string must be freed by caller] */
static char *
showoctets(guchar *octets, guint len, guint hexlen) /* if len <= hexlen, always show hex */
{
guint dohex = 0;
guint i;
char *str, *p;
const char *endstr = empty;
if (len == 0) {
str = g_malloc(1);
str[0] = 0;
} else {
for (i=0; i<len; i++) {
if (!isprint(octets[i])) /* maybe isblank() as well ... */
dohex++;
}
if (len > MAX_OTSLEN) { /* limit the maximum output.... */
len = MAX_OTSLEN;
endstr = "...."; /* this is 5 bytes !! */
}
if (dohex) {
str = p = g_malloc(len*2 + 5);
for (i=0; i<len; i++) {
p += g_sprintf(p, "%2.2X", octets[i]);
}
strncpy(p, endstr, len*2 + 5);
} else {
if (len <= hexlen) { /* show both hex and ascii, assume hexlen < MAX_OTSLEN */
str = p = g_malloc(len*3+2);
for (i=0; i<len; i++) {
p += g_sprintf(p, "%2.2X", octets[i]);
}
*p++ = ' '; /* insert space */
strncpy(p, octets, len);
p[len] = 0;
} else {
/* g_strdup_printf("%*s%s", len, octets, endstr) does not work ?? */
str = g_malloc(len+5);
strncpy(str, octets, len);
strncpy(&str[len], endstr, 5);
}
}
}
return str;
}
/* allow NULL pointers in strcmp, handle them as empty strings */
static int
g_strcmp(gconstpointer a, gconstpointer b)
{
if (a == 0) a = empty;
if (b == 0) b = empty;
return strcmp(a, b);
}
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/* WARNING WARNING WARNING WARNING WARNING WARNING */
/* */
/* Most of the following routine is guesswork in order to */
/* speed up resynchronisation if the dissector lost the */
/* encoding due to incomplete captures, or a capture that */
/* starts in the middle of a fragmented ip packet */
/* If this poses to many problems, these settings can be */
/* made part of the protocol settings in the user interface */
/*************************************************************/
/* check length for a reasonable value, return a corrected value */
static int
checklength(int len, int def, int cls, int tag, char *lenstr, int strmax)
{
int newlen = len;
if ( ! def) {
g_snprintf(lenstr, strmax, "indefinite");
return len;
}
if (len < 0) /* negative ..... */
newlen = 4;
if (cls != BER_CLASS_UNI) { /* don't know about the tags */
if (len > 131071)
newlen = 64;
} else {
switch (tag) {
case BER_UNI_TAG_EOC: /* End Of Contents */
case BER_UNI_TAG_NULL: /* Null */
newlen = 0;
break;
case BER_UNI_TAG_BOOLEAN: /* Boolean */
newlen = 1;
break;
case BER_UNI_TAG_INTEGER: /* Integer */
case BER_UNI_TAG_ENUMERATED: /* Enumerated */
if (len > 8)
newlen = 4;
break;
case BER_UNI_TAG_BITSTRING: /* Bit String */
if (len > 8)
newlen = 4;
break;
case BER_UNI_TAG_OCTETSTRING: /* Octet String */
case BER_UNI_TAG_NumericString: /* Numerical String */
case BER_UNI_TAG_PrintableString: /* Printable String */
case BER_UNI_TAG_TeletexString: /* Teletext String */
case BER_UNI_TAG_VideotexString: /* Video String */
case BER_UNI_TAG_IA5String: /* IA5 String */
case BER_UNI_TAG_GraphicString: /* Graphical String */
case BER_UNI_TAG_VisibleString: /* Visible String */
case BER_UNI_TAG_GeneralString: /* General String */
if (len > 65535)
newlen = 32;
break;
case BER_UNI_TAG_OID: /* Object Identifier */
case BER_UNI_TAG_ObjectDescriptor: /* Description */
case ASN1_EXT: /* External */
if (len > 64)
newlen = 16;
break;
case BER_UNI_TAG_REAL: /* Real */
if (len >16)
newlen = 8;
break;
case BER_UNI_TAG_SEQUENCE: /* Sequence */
case BER_UNI_TAG_SET: /* Set */
if (len > 65535)
newlen = 64;
break;
case BER_UNI_TAG_UTCTime: /* Universal Time */
case BER_UNI_TAG_GeneralizedTime: /* General Time */
if (len > 32)
newlen = 15;
break;
default:
if (len > 131071)
newlen = 64;
break;
}
}
if (newlen != len) {
/* a change was needed.... */
g_snprintf(lenstr, strmax, "%d(changed from %d)", newlen, len);
} else {
g_snprintf(lenstr, strmax, "%d", len);
}
return newlen;
}
static guint decode_asn1_sequence(tvbuff_t *tvb, guint offset, guint len, proto_tree *pt, int level);
static void PDUreset(int count, int counr2);
static void
dissect_asn1(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) {
ASN1_SCK asn1;
guint cls, con, tag, len, offset, reassembled;
gboolean def;
char lenstr[BUFLS];
char tagstr[BUFLS];
char headstr[BUFLL];
char offstr[BUFLS];
const char *name, *tname;
volatile guint boffset;
volatile int i = 0; /* PDU counter */
proto_tree * volatile ti = 0, * volatile ti2 = 0, *asn1_tree, *tree2;
proto_item *hidden_item;
PDUprops props;
static guint lastseq;
struct tcpinfo *info;
gint delta;
pcount++;
boffset = 0;
reassembled = 1; /* UDP is not a stream, and thus always reassembled .... */
if (pinfo->ipproto == IP_PROTO_TCP) { /* we have tcpinfo */
info = (struct tcpinfo *)pinfo->private_data;
delta = info->seq - lastseq;
reassembled = info->is_reassembled;
lastseq = info->seq;
if (asn1_verbose)
g_message("dissect_asn1: tcp - seq=%u, delta=%d, reassembled=%d",
info->seq, delta, reassembled);
} else {
if (asn1_verbose)
g_message("dissect_asn1: udp");
}
/* Set the protocol column */
if(check_col(pinfo->cinfo, COL_PROTOCOL)){
col_add_fstr(pinfo->cinfo, COL_PROTOCOL, "ASN.1 %s", current_pduname);
}
if(check_col(pinfo->cinfo, COL_INFO))
col_clear(pinfo->cinfo, COL_INFO);
offstr[0] = 0;
if ((first_pdu_offset > 0) && !reassembled) {
boffset = first_pdu_offset;
g_snprintf(offstr, sizeof(offstr), " at %d", boffset);
}
/* open BER decoding */
asn1_open(&asn1, tvb, boffset);
asn1_header_decode(&asn1, &cls, &con, &tag, &def, &len);
asn1_close(&asn1, &offset);
PDUreset(pcount, 0); /* arguments are just for debugging */
getPDUprops(&props, boffset, cls, tag, con);
name = props.name;
tname = props.typename;
len = checklength(len, def, cls, tag, lenstr, sizeof(lenstr));
if (asn1_debug) {
g_snprintf(tagstr, sizeof(tagstr), "%ctag%d", tag_class[cls], tag);
g_snprintf(headstr, sizeof(headstr), "first%s: (%s)%s %d %s, %s, %s, len=%s, off=%d, size=%d ",
offstr,
tname,
name,
pcount,
asn1_cls[cls],
asn1_con[con],
((cls == BER_CLASS_UNI) && (tag < 32)) ? asn1_tag[tag] : tagstr,
lenstr,
boffset,
tvb_length(tvb)
);
} else {
if (props.flags & OUT_FLAG_noname) {
g_snprintf(tagstr, sizeof(tagstr), "%ctag%d", tag_class[cls], tag);
name = ((cls == BER_CLASS_UNI) && (tag < 32)) ? asn1_tag[tag] : tagstr;
}
g_snprintf(headstr, sizeof(headstr), "first pdu%s: (%s)%s ", offstr, tname, name );
}
/* Set the info column */
if(check_col(pinfo->cinfo, COL_INFO)){
col_add_str(pinfo->cinfo, COL_INFO, headstr );
}
/*
* If we have a non-null tree (ie we are building the proto_tree
* instead of just filling out the columns ), then add a BER
* tree node
*/
/* ignore the tree here, must decode BER to know how to reassemble!! */
/* if(tree) { */
TRY { /* catch incomplete PDU's */
ti = proto_tree_add_protocol_format(tree, proto_asn1, tvb, boffset,
def? (int) (offset - boffset + len) : -1,
"ASN.1 %s", current_pduname);
tree2 = proto_item_add_subtree(ti, ett_asn1);
hidden_item = proto_tree_add_item(tree2, ((PDUinfo *)PDUtree->data)->value_id, tvb, boffset,
def? (int) (offset - boffset + len) : -1, TRUE);
PROTO_ITEM_SET_HIDDEN(hidden_item);
offset = boffset; /* the first packet */
while((i < MAXPDU) && (tvb_length_remaining(tvb, offset) > 0)) {
ti2 = 0;
boffset = offset;
/* open BER decoding */
asn1_open(&asn1, tvb, offset);
asn1_header_decode(&asn1, &cls, &con, &tag, &def, &len);
asn1_close(&asn1, &offset);
PDUreset(pcount, i+1);
getPDUprops(&props, boffset, cls, tag, con);
name = props.name;
tname = props.typename;
if (!def)
len = tvb_length_remaining(tvb, offset);
len = checklength(len, def, cls, tag, lenstr, sizeof(lenstr));
if (asn1_debug) {
g_snprintf(tagstr, sizeof(tagstr), "%ctag%d", tag_class[cls], tag);
g_snprintf(headstr, sizeof(headstr), "%s, %s, %s, len=%s, off=%d, remaining=%d",
asn1_cls[cls],
asn1_con[con],
((cls == BER_CLASS_UNI) && (tag < 32)) ? asn1_tag[tag] : tagstr,
lenstr,
boffset,
tvb_length_remaining(tvb, offset) );
if (props.value_id == -1)
ti2 = proto_tree_add_text(tree2, tvb, boffset,
def? (int) (offset - boffset + len) : -1,
"%s: (%s)%s %d-%d %s", current_pduname,
tname, name, pcount, i+1, headstr);
else {
ti2 = proto_tree_add_none_format(tree2, props.value_id, tvb, boffset,
def? (int) (offset - boffset + len) : -1,
"%s: (%s)%s %d-%d %s ~", current_pduname,
tname, name, pcount, i+1, headstr);
if (props.type_id != -1){
hidden_item = proto_tree_add_item(tree2, props.type_id, tvb, boffset,
def? (int) (offset - boffset + len) : -1, TRUE);
PROTO_ITEM_SET_HIDDEN(hidden_item);
}
}
} else {
if (props.flags & OUT_FLAG_noname) {
g_snprintf(tagstr, sizeof(tagstr), "%ctag%d", tag_class[cls], tag);
name = ((cls == BER_CLASS_UNI) && (tag < 32)) ? asn1_tag[tag] : tagstr;
}
if (props.value_id == -1)
ti2 = proto_tree_add_text(tree2, tvb, boffset,
def? (int) (offset - boffset + len) : -1,
"%s: (%s)%s", current_pduname, tname, name);
else {
ti2 = proto_tree_add_none_format(tree2, props.value_id, tvb, boffset,
def? (int) (offset - boffset + len) : -1,
"%s: (%s)%s ~", current_pduname, tname, name);
if (props.type_id != -1){
hidden_item = proto_tree_add_item(tree2, props.type_id, tvb, boffset,
def? (int) (offset - boffset + len) : -1, TRUE);
PROTO_ITEM_SET_HIDDEN(hidden_item);
}
}
}
asn1_tree = proto_item_add_subtree(ti2, ett_pdu[i]);
#ifdef NEST
taglist[0].cls = cls;
taglist[0].tag = tag;
#endif /* NEST */
if (!def) len++; /* make sure we get an exception if we run off the end! */
offset = decode_asn1_sequence(tvb, offset, len, asn1_tree, 1);
proto_item_set_len(ti2, offset - boffset); /* mark length for hex display */
i++; /* one more full message handled */
if (ti2 && PDUerrcount && asn1_debug) /* show error counts only when in debug mode.... */
proto_item_append_text(ti2," (%d error%s)", PDUerrcount, (PDUerrcount>1)?"s":empty);
}
if(check_col(pinfo->cinfo, COL_INFO))
col_append_fstr(pinfo->cinfo, COL_INFO, "[%d msg%s]", i, (i>1)?"s":empty);
if (ti)
proto_item_append_text(ti, ", %d msg%s", i, (i>1)?"s":empty);
}
CATCH(BoundsError) {
RETHROW;
}
CATCH(ReportedBoundsError) {
if(check_col(pinfo->cinfo, COL_INFO))
col_append_fstr(pinfo->cinfo, COL_INFO, "[%d+1 msg%s]", i, (i>0)?"s":empty);
if (ti)
proto_item_append_text(ti, ", %d+1 msg%s", i, (i>1)?"s":empty);
if (ti2)
proto_item_append_text(ti2, " (incomplete)");
if (asn1_desegment) {
pinfo->desegment_offset = boffset;
pinfo->desegment_len = 1;
if (asn1_verbose)
g_message("ReportedBoundsError: offset=%d len=%d can_desegment=%d",
boffset, 1, pinfo->can_desegment);
} else {
RETHROW;
}
}
ENDTRY;
/* } */
if (asn1_verbose)
g_message("dissect_asn1 finished: desegment_offset=%d desegment_len=%d can_desegment=%d",
pinfo->desegment_offset, pinfo->desegment_len, pinfo->can_desegment);
}
/* decode an ASN.1 sequence, until we have consumed the specified length */
static guint
decode_asn1_sequence(tvbuff_t *tvb, guint offset, guint tlen, proto_tree *pt, int level)
{
ASN1_SCK asn1;
guint ret, cls, con, tag, len, boffset, soffset, eos;
gboolean def;
guint value;
const char *clsstr, *constr, *tagstr;
char tagbuf[BUFLM];
char lenbuf[BUFLM];
char nnbuf[BUFLS];
proto_tree *ti, *pt2;
proto_item *hidden_item;
guchar *octets, *bits, unused;
subid_t *oid;
/* the debugging formats */
static char textfmt_d[] = "off=%d: [%s %s %s] (%s)%s: %d%s"; /* decimal */
static char textfmt_e[] = "off=%d: [%s %s %s] (%s)%s: %d:%s%s"; /* enum */
static char textfmt_s[] = "off=%d: [%s %s %s] (%s)%s: '%s'%s"; /* octet string */
static char textfmt_b[] = "off=%d: [%s %s %s] (%s)%s: %s:%s%s"; /* bit field */
static char textfmt_c[] = "off=%d: [%s %s %s] (%s)%s%s%s"; /* constructed */
static char matchind[] = " ~"; /* indication of possible match */
const char *name, *ename, *tname;
char *oname;
PDUprops props;
ti = 0; /* suppress gcc warning */
soffset = offset; /* where this sequence starts */
eos = offset + tlen;
while (offset < eos) { /* while this entity has not ended... */
boffset = offset;
asn1_open(&asn1, tvb, offset);
ret = asn1_header_decode(&asn1, &cls, &con, &tag, &def, &len);
asn1_close(&asn1, &offset); /* mark current position */
if (ret != ASN1_ERR_NOERROR) {
proto_tree_add_text(pt, tvb, offset, 1, "ASN1 ERROR: %s", asn1_err_to_str(ret) );
break;
}
getPDUprops(&props, boffset, cls, tag, con);
name = props.name;
tname = props.typename;
if (asn1_full)
name = &props.fullname[pabbrev_pdu_len]; /* no abbrev.pduname */
if (asn1_debug) { /* show both names */
g_sprintf(fieldname, "%s[%s]", props.name, props.fullname);
name = fieldname;
}
clsstr = asn1_cls[cls];
constr = asn1_con[con];
if ((cls == BER_CLASS_UNI) && ( tag < 32 )) {
tagstr = asn1_tag[tag];
} else {
g_snprintf(tagbuf, sizeof(tagbuf), "%ctag%d", tag_class[cls], tag);
tagstr = tagbuf;
}
len = checklength(len, def, cls, tag, lenbuf, sizeof(lenbuf));
if (def) {
g_snprintf(nnbuf, sizeof(nnbuf), "NN%d", len);
} else {
strncpy(nnbuf, "NN-", sizeof(nnbuf));
/* make sure we get an exception if we run off the end! */
len = tvb_length_remaining(tvb, offset) + 1;
}
if ( ( ! asn1_debug) && (props.flags & OUT_FLAG_noname) ) {
/* just give type name if we don't know any better */
tname = tagstr;
name = nnbuf; /* this is better than just empty.... */
}
#ifdef NEST
taglist[level].cls = cls;
taglist[level].tag = tag;
#endif /* NEST */
oname = 0;
if (level >= MAX_NEST) { /* nesting too deep..., handle as general octet string */
cls = BER_CLASS_UNI;
tag = BER_UNI_TAG_GeneralString;
oname = g_malloc(strlen(name) + 32);
g_sprintf(oname, "%s ** nesting cut off **", name);
name = oname;
}
switch(cls) {
case BER_CLASS_UNI: /* fprintf(stderr, "Universal\n"); */
switch(tag) {
case BER_UNI_TAG_INTEGER:
ret = asn1_int32_value_decode(&asn1, len, &value); /* read value */
asn1_close(&asn1, &offset); /* mark where we are now */
if (asn1_debug) {
if ( (props.value_id == -1) ||
(tbl_types_wireshark[props.type] != FT_UINT32) )
/* unknown or unexpected: just text */
proto_tree_add_text(pt, tvb, boffset,
offset - boffset, textfmt_d, boffset,
clsstr, constr, tagstr, tname, name, value,
empty);
else {
proto_tree_add_uint_format(pt, props.value_id, tvb, boffset,
offset - boffset, value, textfmt_d, boffset,
clsstr, constr, tagstr, tname, name, value,
matchind);
if (props.type_id != -1) {
hidden_item = proto_tree_add_uint(pt, props.type_id, tvb,
boffset, offset - boffset, value);
PROTO_ITEM_SET_HIDDEN(hidden_item);
}
}
} else {
if ( (props.value_id == -1) ||
(tbl_types_wireshark[props.type] != FT_UINT32) )
/* unknown or unexpected, just text */
proto_tree_add_text(pt, tvb, boffset,
offset - boffset,
"(%s)%s: %d", tname, name, value);
else {
proto_tree_add_uint_format(pt, props.value_id, tvb, boffset,
offset - boffset, value,
"(%s)%s: %d ~", tname, name, value);
if (props.type_id != -1){
hidden_item = proto_tree_add_uint(pt, props.type_id, tvb,
boffset, offset - boffset, value);
PROTO_ITEM_SET_HIDDEN(hidden_item);
}
}
}
break;
case BER_UNI_TAG_ENUMERATED:
ret = asn1_int32_value_decode(&asn1, len, &value); /* read value */
asn1_close(&asn1, &offset); /* mark where we are now */
ename = getPDUenum(&props, boffset, cls, tag, value);
if (asn1_debug) {
if ( (props.value_id == -1) ||
(tbl_types_wireshark[props.type] != FT_UINT32) )
/* unknown or unexpected, just text */
proto_tree_add_text(pt, tvb, boffset,
offset - boffset,
textfmt_e, boffset, clsstr, constr, tagstr,
tname, name, value, ename, empty);
else {
proto_tree_add_uint_format(pt, props.value_id, tvb, boffset,
offset - boffset, value,
textfmt_e, boffset, clsstr, constr, tagstr,
tname, name, value, ename, matchind);
if (props.type_id != -1){
hidden_item = proto_tree_add_uint(pt, props.type_id, tvb,
boffset, offset - boffset, value);
PROTO_ITEM_SET_HIDDEN(hidden_item);
}
}
} else {
if ( (props.value_id == -1) ||
(tbl_types_wireshark[props.type] != FT_UINT32) )
/* unknown or unexpected, just text */
proto_tree_add_text(pt, tvb, boffset,
offset - boffset,
"(%s)%s: %d:%s", tname, name, value, ename);
else {
proto_tree_add_uint_format(pt, props.value_id, tvb, boffset,
offset - boffset, value,
"(%s)%s: %d:%s ~", tname, name, value, ename);
if (props.type_id != -1){
hidden_item = proto_tree_add_uint(pt, props.type_id, tvb,
boffset, offset - boffset, value);
PROTO_ITEM_SET_HIDDEN(hidden_item);
}
}
}
break;
case BER_UNI_TAG_BOOLEAN:
ret = asn1_bool_decode(&asn1, len, (gboolean *)&value); /* read value */
asn1_close(&asn1, (gint *)&offset); /* mark where we are now */
if (asn1_debug) {
if ( (props.value_id == -1) ||
(tbl_types_wireshark[props.type] != FT_BOOLEAN) )
/* unknown or unexpected, just text */
proto_tree_add_text(pt, tvb, boffset,
offset - boffset,
textfmt_s, boffset, clsstr, constr, tagstr,
tname, name, value? "true" : "false", empty);
else {
proto_tree_add_boolean_format(pt, props.value_id, tvb, boffset,
offset - boffset, value != 0,
textfmt_s, boffset, clsstr, constr, tagstr,
tname, name, value? "true" : "false", matchind);
if (props.type_id != -1){
hidden_item = proto_tree_add_boolean(pt, props.type_id, tvb,
boffset, offset - boffset, value != 0);
PROTO_ITEM_SET_HIDDEN(hidden_item);
}
}
} else {
if ( (props.value_id == -1) ||
(tbl_types_wireshark[props.type] != FT_BOOLEAN) )
/* unknown or unexpected, just text */
proto_tree_add_text(pt, tvb, boffset,
offset - boffset,
"(%s)%s: %s", tname, name,
value? "true" : "false");
else {
proto_tree_add_boolean_format(pt, props.value_id, tvb, boffset,
offset - boffset, value != 0,
"(%s)%s: %s ~", tname, name,
value? "true" : "false");
if (props.type_id != -1){
hidden_item = proto_tree_add_boolean(pt, props.type_id, tvb,
boffset, offset - boffset, value != 0);
PROTO_ITEM_SET_HIDDEN(hidden_item);
}
}
}
break;
case BER_UNI_TAG_OCTETSTRING:
case BER_UNI_TAG_NumericString:
case BER_UNI_TAG_PrintableString:
case BER_UNI_TAG_TeletexString:
case BER_UNI_TAG_IA5String:
case BER_UNI_TAG_GeneralString:
case BER_UNI_TAG_UTCTime:
case BER_UNI_TAG_GeneralizedTime:
/* read value, \0 terminated */
ret = asn1_string_value_decode(&asn1, len, &octets);
asn1_close(&asn1, (gint *)&offset); /* mark where we are now */
ename = showoctets(octets, len, (tag == BER_UNI_TAG_OCTETSTRING) ? 4 : 0 );
if (asn1_debug) {
if ( (props.value_id == -1) ||
(tbl_types_wireshark[props.type] != FT_STRINGZ) )
/* unknown or unexpected, just text */
proto_tree_add_text(pt, tvb, boffset,
offset - boffset,
textfmt_s, boffset, clsstr, constr, tagstr,
tname, name, ename, empty);
else {
proto_tree_add_string_format(pt, props.value_id, tvb, boffset,
offset - boffset, octets, /* \0 termnated */
textfmt_s, boffset, clsstr, constr, tagstr,
tname, name, ename, matchind);
if (props.type_id != -1){
hidden_item = proto_tree_add_string(pt, props.type_id, tvb,
boffset, offset - boffset, octets);
PROTO_ITEM_SET_HIDDEN(hidden_item);
}
}
} else {
if ( (props.value_id == -1) ||
(tbl_types_wireshark[props.type] != FT_STRINGZ) )
/* unknown or unexpected, just text */
proto_tree_add_text(pt, tvb, boffset,
offset - boffset,
"(%s)%s: %s", tname, name, ename);
else {
proto_tree_add_string_format(pt, props.value_id, tvb, boffset,
offset - boffset, octets, /* \0 terminated */
"(%s)%s: %s ~", tname, name, ename);
if (props.type_id != -1){
hidden_item = proto_tree_add_string(pt, props.type_id, tvb,
boffset, offset - boffset, octets);
PROTO_ITEM_SET_HIDDEN(hidden_item);
}
}
}
g_free(octets);
g_free( (gpointer) ename);
break;
case BER_UNI_TAG_BITSTRING:
ret = asn1_bits_decode(&asn1, len, &bits, &con, &unused); /* read value */
asn1_close(&asn1, &offset); /* mark where we are now */
ename = showbitnames(bits, (con*8)-unused, &props, offset);
if (asn1_debug) {
if ( (props.value_id == -1) ||
(tbl_types_wireshark[props.type] != FT_UINT32) )
/* unknown or unexpected, just text */
proto_tree_add_text(pt, tvb, boffset,
offset - boffset,
textfmt_b, boffset, clsstr, constr, tagstr,
tname, name,
showbits(bits, (con*8)-unused), ename, empty);
else {
proto_tree_add_uint_format(pt, props.value_id, tvb, boffset,
offset - boffset, *bits, /* XXX length ? XXX */
textfmt_b, boffset, clsstr, constr, tagstr,
tname, name,
showbits(bits, (con*8)-unused),ename, matchind);
if (props.type_id != -1){
hidden_item = proto_tree_add_uint(pt, props.type_id, tvb,
boffset, offset - boffset, *bits);
PROTO_ITEM_SET_HIDDEN(hidden_item);
}
}
} else {
if ( (props.value_id == -1) ||
(tbl_types_wireshark[props.type] != FT_UINT32) )
/* unknown or unexpected, just text */
proto_tree_add_text(pt, tvb, boffset,
offset - boffset,
"(%s)%s: %s:%s", tname, name,
showbits(bits, (con*8)-unused), ename);
else {
proto_tree_add_uint_format(pt, props.value_id, tvb, boffset,
offset - boffset, *bits, /* XXX length ? XXX */
"(%s)%s: %s:%s ~", tname, name,
showbits(bits, (con*8)-unused), ename);
if (props.type_id != -1){
hidden_item = proto_tree_add_uint(pt, props.type_id, tvb,
boffset, offset - boffset, *bits);
PROTO_ITEM_SET_HIDDEN(hidden_item);
}
}
}
g_free(bits);
break;
case BER_UNI_TAG_SET:
case BER_UNI_TAG_SEQUENCE:
/* show full sequence length */
if (asn1_debug) {
ename = empty;
if ( (props.flags & OUT_FLAG_dontshow) || asn1_full)
ename = ", noshow";
if ( (props.flags & OUT_FLAG_constructed))
ename = ", unexpected constructed";
if (props.value_id == -1)
ti = proto_tree_add_text(pt, tvb, boffset, offset - boffset + len,
textfmt_c, boffset, clsstr, constr, tagstr,
tname, name, ename, empty);
else {
ti = proto_tree_add_item(pt, props.value_id, tvb,
boffset, 1, TRUE);
/* change te text to to what I really want */
proto_item_set_text(ti, textfmt_c, boffset, clsstr, constr,
tagstr, tname, name, ename, matchind);
if (props.type_id != -1){
hidden_item = proto_tree_add_item(pt, props.type_id, tvb,
boffset, 1, TRUE);
PROTO_ITEM_SET_HIDDEN(hidden_item);
}
}
} else {
if (props.value_id == -1) {
if ( (! asn1_full) && ((props.flags & OUT_FLAG_dontshow) == 0) )
ti = proto_tree_add_text(pt, tvb, boffset,
offset - boffset + len,
"(%s)%s", tname, name);
} else {
if ( (! asn1_full) && ((props.flags & OUT_FLAG_dontshow) == 0) )
ti = proto_tree_add_none_format(pt, props.value_id, tvb,
boffset, offset - boffset + len,
"(%s)%s ~", tname, name);
else {
/* don't care about the text */
ti = hidden_item = proto_tree_add_item(pt, props.value_id, tvb,
boffset, 1, TRUE);
PROTO_ITEM_SET_HIDDEN(hidden_item);
}
if (props.type_id != -1){
hidden_item = proto_tree_add_item(pt, props.type_id, tvb,
boffset, 1, TRUE);
PROTO_ITEM_SET_HIDDEN(hidden_item);
}
}
}
if (len == 0) return offset; /* don't recurse if offset isn't going to change */
if ( ( ! asn1_full) && (asn1_debug || ((props.flags & OUT_FLAG_dontshow) == 0)))
pt2 = proto_item_add_subtree(ti, ett_seq[level]);
else
pt2 = pt;
offset = decode_asn1_sequence(tvb, offset, len, pt2, level+1); /* recurse */
if ( ( ! asn1_full) && (asn1_debug || ((props.flags & OUT_FLAG_dontshow) == 0)))
proto_item_set_len(ti, offset - boffset);
break;
case BER_UNI_TAG_EOC:
if (asn1_debug) { /* don't show if not debugging */
proto_tree_add_text(pt, tvb, boffset, offset - boffset, textfmt_d,
boffset, clsstr, constr, tagstr, tname, name,
offset - soffset, empty);
}
getPDUprops(&props, soffset, ASN1_EOI, 1, 0); /* mark end of this sequence */
return offset;
case BER_UNI_TAG_OID:
ret = asn1_oid_value_decode(&asn1, len, &oid, &con);
asn1_close(&asn1, (gint *)&offset); /* mark where we are now */
ename = showoid(oid, con);
if (asn1_debug) {
if ( (props.value_id == -1) ||
(tbl_types_wireshark[props.type] != FT_BYTES) )
/* unknown or unexpected, just text */
proto_tree_add_text(pt, tvb, boffset, offset - boffset, textfmt_s,
boffset, clsstr, constr, tagstr, tname, name,
ename, empty);
else {
proto_tree_add_bytes_format(pt, props.value_id, tvb, boffset,
offset - boffset, ename,/* XXX length?*/
"(%s)%s: %s ~", tname, name, ename);
if (props.type_id != -1){
hidden_item = proto_tree_add_bytes(pt, props.type_id, tvb,
boffset, offset - boffset, ename);
PROTO_ITEM_SET_HIDDEN(hidden_item);
}
}
} else {
if ( (props.value_id == -1) ||
(tbl_types_wireshark[props.type] != FT_BYTES) )
/* unknown or unexpected, just text */
proto_tree_add_text(pt, tvb, boffset,
offset - boffset,
"(%s)%s: %s", tname, name, ename);
else {
proto_tree_add_bytes_format(pt, props.value_id, tvb, boffset,
offset - boffset, ename, /* XXX length ? */
"(%s)%s: %s ~", tname, name, ename);
if (props.type_id != -1){
hidden_item = proto_tree_add_bytes(pt, props.type_id, tvb,
boffset, offset - boffset, ename);
PROTO_ITEM_SET_HIDDEN(hidden_item);
}
}
}
g_free(oid);
break;
case BER_UNI_TAG_NULL:
if (asn1_debug) {
proto_tree_add_text(pt, tvb, boffset, offset - boffset + len, textfmt_s,
boffset, clsstr, constr, tagstr, tname, name,
"[NULL]", empty);
} else {
proto_tree_add_text(pt, tvb, boffset, offset - boffset + len,
"(%s)%s: [NULL]", tname, name);
}
offset += len; /* skip value ... */
break;
case BER_UNI_TAG_ObjectDescriptor:
case ASN1_EXT:
case BER_UNI_TAG_REAL:
case BER_UNI_TAG_VideotexString:
case BER_UNI_TAG_GraphicString:
case BER_UNI_TAG_VisibleString:
default:
if (asn1_debug) {
ti = proto_tree_add_text(pt, tvb, boffset, offset - boffset + len,
textfmt_s, boffset, clsstr, constr, tagstr,
tname, name, lenbuf, empty);
} else {
ti = proto_tree_add_text(pt, tvb, boffset, offset - boffset + len,
"(%s)%s: %s bytes", tname, name, lenbuf);
}
proto_item_append_text(ti, " *"); /* indicate default is used */
offset += len; /* skip value ... */
break;
};
break;
case BER_CLASS_CON: /* fprintf(stderr, "Context\n"); */
case BER_CLASS_APP: /* fprintf(stderr, "Application\n"); */
case BER_CLASS_PRI: /* fprintf(stderr, "Private\n"); */
if (def && !con) {
if (props.value_id == -1) /* type unknown, handle as string */
goto dostring;
switch(props.type) {
/* this is via the asn1 description, don't trust the length */
case TBL_INTEGER:
if (len > 4)
goto dostring;
ret = asn1_int32_value_decode(&asn1, len, (gint32 *)&value); /* read value */
asn1_close(&asn1, &offset); /* mark where we are now */
if (asn1_debug) {
if ( (props.value_id == -1) ||
(tbl_types_wireshark[props.type] != FT_UINT32) )
/* unknown or unexpected, just text */
proto_tree_add_text(pt, tvb,
boffset, offset - boffset,
textfmt_d, boffset, clsstr, constr,
tagstr, tname, name, value, empty);
else {
proto_tree_add_uint_format(pt, props.value_id, tvb,
boffset, offset - boffset, value,
textfmt_d, boffset, clsstr, constr,
tagstr, tname, name, value, matchind);
if (props.type_id != -1){
hidden_item = proto_tree_add_uint(pt, props.type_id,
tvb, boffset, offset - boffset, value);
PROTO_ITEM_SET_HIDDEN(hidden_item);
}
}
} else {
if ( (props.value_id == -1) ||
(tbl_types_wireshark[props.type] != FT_UINT32) )
/* unknown or unexpected, just text */
proto_tree_add_text(pt, tvb,
boffset, offset - boffset,
"(%s)%s: %d", tname, name, value);
else {
proto_tree_add_uint_format(pt, props.value_id, tvb,
boffset, offset - boffset, value,
"(%s)%s: %d ~", tname, name, value);
if (props.type_id != -1){
hidden_item = proto_tree_add_uint(pt, props.type_id,
tvb, boffset, offset - boffset, value);
PROTO_ITEM_SET_HIDDEN(hidden_item);
}
}
}
break;
case TBL_ENUMERATED:
if (len > 4)
goto dostring;
ret = asn1_int32_value_decode(&asn1, len, &value); /* read value */
asn1_close(&asn1, &offset); /* mark where we are now */
ename = getPDUenum(&props, boffset, cls, tag, value);
if (asn1_debug) {
if ( (props.value_id == -1) ||
(tbl_types_wireshark[props.type] != FT_UINT32) )
/* unknown or unexpected, just text */
proto_tree_add_text(pt, tvb,
boffset, offset - boffset,
textfmt_e, boffset, clsstr, constr,
tagstr, tname, name, value, ename, empty);
else {
proto_tree_add_uint_format(pt, props.value_id, tvb,
boffset, offset - boffset, value,
textfmt_e, boffset, clsstr, constr,
tagstr, tname, name, value, ename, matchind);
if (props.type_id != -1){
hidden_item = proto_tree_add_uint(pt, props.type_id,
tvb, boffset, offset - boffset, value);
PROTO_ITEM_SET_HIDDEN(hidden_item);
}
}
} else {
if ( (props.value_id == -1) ||
(tbl_types_wireshark[props.type] != FT_UINT32) )
/* unknown or unexpected, just text */
proto_tree_add_text(pt, tvb,
boffset, offset - boffset,
"(%s)%s: %d:%s", tname, name, value, ename);
else {
proto_tree_add_uint_format(pt, props.value_id, tvb,
boffset, offset - boffset, value,
"(%s)%s: %d:%s ~", tname, name, value, ename);
if (props.type_id != -1){
hidden_item = proto_tree_add_uint(pt, props.type_id,
tvb, boffset, offset - boffset, value);
PROTO_ITEM_SET_HIDDEN(hidden_item);
}
}
}
break;
case TBL_BITSTRING:
if (len > (1+4)) /* max 32 bits ...?.. */
goto dostring;
/* read value */
ret = asn1_bits_decode(&asn1, len, &bits, &con, &unused);
asn1_close(&asn1, (gint *)&offset); /* mark where we are now */
ename = showbitnames(bits, (con*8)-unused, &props, offset);
if (asn1_debug) {
if ( (props.value_id == -1) ||
(tbl_types_wireshark[props.type] != FT_UINT32) )
/* unknown or unexpected, just text */
proto_tree_add_text(pt, tvb,
boffset, offset - boffset,
textfmt_b, boffset, clsstr, constr,
tagstr, tname, name,
showbits(bits, (con*8)-unused), ename,
empty);
else {
proto_tree_add_uint_format(pt, props.value_id, tvb,
boffset, offset - boffset, *bits,
textfmt_b, boffset, clsstr, constr,
tagstr, tname, name,
showbits(bits, (con*8)-unused), ename,
matchind);
if (props.type_id != -1){
hidden_item = proto_tree_add_uint(pt, props.type_id,
tvb, boffset, offset - boffset, *bits);
PROTO_ITEM_SET_HIDDEN(hidden_item);
}
}
} else {
if ( (props.value_id == -1) ||
(tbl_types_wireshark[props.type] != FT_UINT32) )
/* unknown or unexpected, just text */
proto_tree_add_text(pt, tvb, boffset, offset - boffset,
"(%s)%s: %s:%s", tname, name,
showbits(bits, (con*8)-unused), ename);
else {
proto_tree_add_uint_format(pt, props.value_id, tvb,
boffset, offset - boffset, *bits,
"(%s)%s: %s:%s ~", tname, name,
showbits(bits, (con*8)-unused), ename);
if (props.type_id != -1){
hidden_item = proto_tree_add_uint(pt, props.type_id,
tvb, boffset, offset - boffset, *bits);
PROTO_ITEM_SET_HIDDEN(hidden_item);
}
}
}
g_free(bits);
break;
case TBL_BOOLEAN:
if (len > 1)
goto dostring;
ret = asn1_bool_decode(&asn1, len, (gboolean *)&value); /* read value */
asn1_close(&asn1, (gint *)&offset); /* mark where we are now */
if (asn1_debug) {
if ( (props.value_id == -1) ||
(tbl_types_wireshark[props.type] != FT_BOOLEAN) )
/* unknown or unexpected, just text */
proto_tree_add_text(pt, tvb,
boffset, offset - boffset,
textfmt_s, boffset, clsstr, constr,
tagstr, tname, name,
value? "true" : "false", empty);
else {
proto_tree_add_boolean_format(pt, props.value_id, tvb,
boffset, offset - boffset, value != 0,
textfmt_s, boffset, clsstr, constr,
tagstr, tname, name,
value? "true" : "false", matchind);
if (props.type_id != -1){
hidden_item = proto_tree_add_boolean(pt, props.type_id,
tvb, boffset, offset - boffset, value != 0);
PROTO_ITEM_SET_HIDDEN(hidden_item);
}
}
} else {
if ( (props.value_id == -1) ||
(tbl_types_wireshark[props.type] != FT_BOOLEAN) )
/* unknown or unexpected, just text */
proto_tree_add_text(pt, tvb,
boffset, offset - boffset,
"(%s)%s: %s", tname, name,
value? "true" : "false");
else {
proto_tree_add_boolean_format(pt, props.value_id, tvb,
boffset, offset - boffset, value != 0,
"(%s)%s: %s ~", tname, name,
value? "true" : "false");
if (props.type_id != -1){
hidden_item = proto_tree_add_boolean(pt, props.type_id,
tvb, boffset, offset - boffset, value != 0);
PROTO_ITEM_SET_HIDDEN(hidden_item);
}
}
}
break;
case TBL_NULL:
if (len > 0)
goto dostring;
if (asn1_debug) {
proto_tree_add_text(pt, tvb, boffset, offset - boffset + len,
textfmt_s, boffset, clsstr, constr,
tagstr, tname, name, "[NULL]", empty);
} else {
proto_tree_add_text(pt, tvb, boffset, offset - boffset + len,
"(%s)%s: [NULL]", tname, name);
}
offset += len; /* skip value ... */
break;
default:
dostring:
props.value_id = -1; /* unlikely this is correct, dont use it */
/* fallthrough */
case TBL_OCTETSTRING:
/* defined length, not constructed, must be a string.... */
ret = asn1_string_value_decode(&asn1, len, &octets); /* read value */
asn1_close(&asn1, (gint *)&offset); /* mark where we are now */
ename = showoctets(octets, len, 2); /* convert octets to printable */
if (asn1_debug) {
if ( (props.value_id == -1) ||
(tbl_types_wireshark[props.type] != FT_STRINGZ) )
/* unknown or unexpected, just text */
proto_tree_add_text(pt, tvb,
boffset, offset - boffset,
textfmt_s, boffset, clsstr, constr,
tagstr, tname, name, ename, empty);
else {
proto_tree_add_string_format(pt, props.value_id, tvb,
boffset, offset - boffset, (gchar *)octets, /* XXX */
textfmt_s, boffset, clsstr, constr,
tagstr, tname, name, ename, matchind);
if (props.type_id != -1){
hidden_item = proto_tree_add_string(pt, props.type_id,
tvb, boffset, offset - boffset, (gchar *)octets);
PROTO_ITEM_SET_HIDDEN(hidden_item);
}
}
} else {
if ( (props.value_id == -1) ||
(tbl_types_wireshark[props.type] != FT_STRINGZ) )
/* unknown or unexpected, just text */
proto_tree_add_text(pt, tvb, boffset, offset - boffset,
"(%s)%s: %s", tname, name, ename);
else {
proto_tree_add_string_format(pt, props.value_id, tvb,
boffset, offset - boffset, (gchar *)octets, /* XXX */
"(%s)%s: %s ~", tname, name, ename);
if (props.type_id != -1){
hidden_item = proto_tree_add_string(pt, props.type_id,
tvb, boffset, offset - boffset, (gchar *)octets);
PROTO_ITEM_SET_HIDDEN(hidden_item);
}
}
}
g_free(octets);
g_free( (gpointer) ename);
break;
}
} else {
/* indefinite length or constructed.... must be a sequence .... */
/* show full sequence length */
if (asn1_debug) {
ename = empty;
if ( (props.flags & OUT_FLAG_dontshow) || asn1_full)
ename = ", noshow";
if ( (props.flags & OUT_FLAG_constructed))
ename = ", unexpected constructed";
if (props.value_id == -1)
ti = proto_tree_add_text(pt, tvb, boffset, offset - boffset + len,
textfmt_c, boffset, clsstr, constr,
tagstr, tname, name, ename, empty);
else {
ti = proto_tree_add_item(pt, props.value_id, tvb,
boffset, 1, TRUE);
/* change te text to to what I really want */
if (ti) {
proto_item_set_text(ti, textfmt_c, boffset, clsstr, constr,
tagstr, tname, name, ename, matchind);
if (props.type_id != -1){
hidden_item = proto_tree_add_item(pt, props.type_id, tvb,
boffset, 1, TRUE);
PROTO_ITEM_SET_HIDDEN(hidden_item);
}
} else {
ti = proto_tree_add_text(pt, tvb, boffset,
offset - boffset + len,
textfmt_c, boffset, clsstr, constr,
tagstr, tname, name, ename, empty);
}
}
} else {
if (props.value_id == -1) {
if ( ( ! asn1_full) && ((props.flags & OUT_FLAG_dontshow) == 0))
ti = proto_tree_add_text(pt, tvb, boffset,
offset - boffset + len, "(%s)%s", tname, name);
} else {
if ( ( ! asn1_full) && ((props.flags & OUT_FLAG_dontshow) == 0))
ti = proto_tree_add_none_format(pt, props.value_id, tvb,
boffset, 1,
"(%s)%s ~", tname, name);
else {
/* don't care about the text */
ti = proto_tree_add_item(pt, props.value_id,
tvb, boffset, 1, TRUE);
PROTO_ITEM_SET_HIDDEN(ti);
}
if (props.type_id != -1){
hidden_item = proto_tree_add_item(pt, props.type_id,
tvb, boffset, 1, TRUE);
PROTO_ITEM_SET_HIDDEN(hidden_item);
}
}
}
if (len == 0) return offset; /* don't recurse if offset isn't going to change */
if ( ( ! asn1_full) && (asn1_debug || ((props.flags & OUT_FLAG_dontshow) == 0)))
pt2 = proto_item_add_subtree(ti, ett_seq[level]);
else
pt2 = pt;
offset = decode_asn1_sequence(tvb, offset, len, pt2, level+1); /* recurse */
if ( ( ! asn1_full) && (asn1_debug || ((props.flags & OUT_FLAG_dontshow) == 0)))
proto_item_set_len(ti, offset - boffset);
}
break;
default: /* fprintf(stderr, "Other\n"); */
if (asn1_debug) {
ti = proto_tree_add_text(pt, tvb, boffset, offset - boffset + len,
textfmt_s, boffset, clsstr, constr, tagstr,
tname, name, lenbuf, empty);
} else {
ti = proto_tree_add_text(pt, tvb, boffset, offset - boffset + len,
"(%s)%s: %s bytes %s data", tname, name,
lenbuf, clsstr);
}
proto_item_append_text(ti, " *"); /* indicate default is used */
offset += len; /* skip value ... */
break;
}
g_free(oname); /* XXX, memory management ? */
}
/* proto_tree_add_text(pt, tvb, offset, 1, "Marker: offset=%d", offset); */
getPDUprops(&props, soffset, ASN1_EOI, 0, 0); /* mark end of this sequence */
return offset;
}
#define READSYNTAX
#ifdef READSYNTAX
/************************************************************************************************/
/* search throug the ASN.1 description for appropriate names */
/************************************************************************************************/
guint lev_limit = G_MAXINT;
int icount = 0; /* item counter */
static guint
parse_tt3(tvbuff_t *tvb, guint offset, guint size, guint level, GNode *ptr)
{
ASN1_SCK asn1;
guint eos, ret, cls, con, tag, len, value;
gboolean def;
guchar *octets, *bits, unused;
subid_t *oid;
const char *clsstr, *constr, *tagstr;
char tagbuf[BUFLM];
char lenbuf[BUFLM];
GNode *cur_node = 0;
eos = offset + size;
if (level > lev_limit)
return eos;
while(offset < eos) {
if (ptr) /* build pointer tree to all asn1 enteties */
cur_node = g_node_append_data(ptr, GUINT_TO_POINTER(offset));
asn1_open(&asn1, tvb, offset);
ret = asn1_header_decode(&asn1, &cls, &con, &tag, &def, &len);
asn1_close(&asn1, (gint *)&offset); /* mark where we are */
icount++;
clsstr = asn1_cls[cls];
constr = asn1_con[con];
if ((cls == BER_CLASS_UNI) && ( tag < 32 )) {
tagstr = asn1_tag[tag];
} else {
g_snprintf(tagbuf, sizeof(tagbuf), "tag%d", tag);
tagstr = tagbuf;
}
if (def) {
g_snprintf(lenbuf, sizeof(lenbuf), "%d", len);
} else {
strncpy(lenbuf, "indefinite", sizeof(lenbuf));
len = tvb_length_remaining(tvb, offset);
}
switch(cls) {
case BER_CLASS_UNI: /* fprintf(stderr, "Universal\n"); */
switch(tag) {
case BER_UNI_TAG_INTEGER:
case BER_UNI_TAG_ENUMERATED:
ret = asn1_int32_value_decode(&asn1, len, (gint32 *)&value); /* read value */
asn1_close(&asn1, (gint *)&offset); /* mark where we are */
break;
case BER_UNI_TAG_BOOLEAN:
ret = asn1_bool_decode(&asn1, len, (gboolean *)&value); /* read value */
asn1_close(&asn1, &offset); /* mark where we are */
break;
case BER_UNI_TAG_OCTETSTRING:
case BER_UNI_TAG_NumericString:
case BER_UNI_TAG_PrintableString:
case BER_UNI_TAG_TeletexString:
case BER_UNI_TAG_IA5String:
case BER_UNI_TAG_GeneralString:
case BER_UNI_TAG_UTCTime:
case BER_UNI_TAG_GeneralizedTime:
ret = asn1_string_value_decode(&asn1, len, &octets); /* read value */
asn1_close(&asn1, &offset); /* mark where we are */
g_free(octets);
break;
case BER_UNI_TAG_BITSTRING:
ret = asn1_bits_decode(&asn1, len, &bits, &con, &unused);
asn1_close(&asn1, &offset); /* mark where we are */
g_free(bits);
break;
case BER_UNI_TAG_SET:
case BER_UNI_TAG_SEQUENCE:
if (len == 0) /* don't recurse if offset isn't going to change */
return offset;
offset = parse_tt3(tvb, offset, len, level+1, cur_node); /* recurse */
break;
case BER_UNI_TAG_EOC:
return offset;
case BER_UNI_TAG_OID:
ret = asn1_oid_value_decode(&asn1, len, &oid, &con);
asn1_close(&asn1, &offset); /* mark where we are */
g_free(oid);
break;
case BER_UNI_TAG_NULL:
offset += len;
break;
case BER_UNI_TAG_ObjectDescriptor:
case ASN1_EXT:
case BER_UNI_TAG_REAL:
case BER_UNI_TAG_VideotexString:
case BER_UNI_TAG_GraphicString:
case BER_UNI_TAG_VisibleString:
default:
if (asn1_verbose) g_message("%d skip1 %d", offset, len);
offset += len; /* skip value ... */
break;
};
break;
case BER_CLASS_CON: /* fprintf(stderr, "Context\n"); */
tagstr = tagbuf;
g_snprintf(tagbuf, sizeof(tagbuf), "TAG%d", tag);
if (def && !con) {
/* defined length, not constructed, must be a string.... */
asn1_string_value_decode(&asn1, len, &octets); /* read value */
asn1_close(&asn1, &offset); /* mark where we are */
g_free(octets);
} else {
/* indefinite length or constructed.... must be a sequence .... */
if (len == 0) /* don't recurse if offset isn't going to change */
return offset;
offset = parse_tt3(tvb, offset, len, level+1, cur_node); /* recurse */
}
break;
default: /* fprintf(stderr, "Other\n"); */
if (asn1_verbose) g_message("%d skip2 %d", offset, len);
offset += len; /* skip value ... */
break;
}
}
return offset;
}
static void showGNodes(GNode *p, int n);
#if 0
static gboolean
myLeaf(GNode *node, gpointer data)
{
ASN1_SCK asn1;
guint ret, cls, con, tag, def, len;
char *clsstr, *constr, *tagstr;
char tagbuf[BUFLM];
char lenbuf[BUFLM];
(void) data; /* make a reference */
asn1_open(&asn1, asn1_desc, (int)node->data);
ret = asn1_header_decode(&asn1, &cls, &con, &tag, &def, &len);
clsstr = asn1_cls[cls];
constr = asn1_con[con];
if ((cls == BER_CLASS_UNI) && ( tag < 32 )) {
tagstr = asn1_tag[tag];
} else {
g_snprintf(tagbuf, sizeof(tagbuf), "tag%d", tag);
tagstr = tagbuf;
}
if (def) {
g_snprintf(lenbuf, sizeof(lenbuf), "%d", len);
} else {
strncpy(lenbuf, "indefinite", sizeof(lenbuf));
}
if (asn1_verbose)
g_message("off=%d: [%s %s %s] len=%s", (int)node->data, clsstr, constr, tagstr, lenbuf);
return FALSE;
}
static void
list_modules(void)
{
if (asn1_verbose) g_message("build GNode tree:");
showGNodes(g_node_first_child(asn1_nodes), 0);
if (asn1_verbose) g_message("end of tree: %d nodes, %d deep, %d leafs, %d branches",
g_node_n_nodes(asn1_nodes, G_TRAVERSE_ALL),
g_node_max_height (asn1_nodes),
g_node_n_nodes(asn1_nodes, G_TRAVERSE_LEAFS),
g_node_n_nodes(asn1_nodes, G_TRAVERSE_NON_LEAFS) );
g_node_traverse(g_node_first_child(asn1_nodes), G_PRE_ORDER, G_TRAVERSE_LEAFS, -1, myLeaf, 0);
}
#endif
static void
tt_build_tree(void) /* build a GNode tree with all offset's to ASN.1 entities */
{
if (asn1_nodes)
g_node_destroy(asn1_nodes);
asn1_nodes = g_node_new(0);
icount = 0;
parse_tt3(asn1_desc, 0, tvb_length(asn1_desc), 0, asn1_nodes);
}
/*****************************************************************************************************/
static guint anonCount; /* for naming anonymous types */
typedef struct _TBLModule TBLModule;
typedef struct _TBLTypeDef TBLTypeDef;
typedef struct _TBLTag TBLTag;
typedef struct _TBLType TBLType;
typedef struct _TBLTypeRef TBLTypeRef;
typedef struct _TBLNamedNumber TBLNamedNumber;
typedef struct _TBLRange TBLRange;
enum _tbl_t {
TBLTYPE_Module,
TBLTYPE_TypeDef,
TBLTYPE_Tag,
TBLTYPE_Type,
TBLTYPE_TypeRef,
TBLTYPE_NamedNumber,
TBLTYPE_Range
};
typedef enum _tbl_t tbl_t;
/* text for 'tbl_t' type for debugging */
static const char *data_types[] = {
"Module",
"TypeDef",
"Tag",
"Type",
"TypeRef",
"NamedNumber",
"Range",
};
enum _TBLTypeContent_t {
TBLTYPETYPE_None,
TBLTYPETYPE_Primitive,
TBLTYPETYPE_Elements,
TBLTYPETYPE_TypeRef
};
typedef enum _TBLTypeContent_t TBLTypeContent_t;
struct _TBLNamedNumber {
tbl_t type;
guchar *name;
guint value;
};
struct _TBLRange {
tbl_t type;
guint from;
guint to;
};
struct _TBLTypeRef {
tbl_t type;
guint typeDefId;
gboolean implicit;
};
struct _TBLTag {
tbl_t type;
guint tclass;
guint code;
};
struct _TBLType {
tbl_t type;
guint typeId;
gboolean optional;
TBLTypeContent_t content;
guchar *fieldName;
gboolean anonymous;
gboolean constraint;
};
struct _TBLTypeDef {
tbl_t type;
guint typeDefId;
guchar *typeName;
guchar isPdu;
};
struct _TBLModule {
tbl_t type;
guchar *name;
subid_t *id;
guint isUseful;
};
struct _TT {
guint totalNumModules;
guint totalNumTypeDefs;
guint totalNumTypes;
guint totalNumTags;
guint totalNumStrings;
guint totalLenStrings;
} TT;
#define CHECKP(p) {if (p==0){g_warning("pointer==0, line %d **********", __LINE__);return;}}
static guint
get_asn1_int(guint want_tag, guint offset)
{
ASN1_SCK asn1;
guint ret, cls, con, tag, len;
gboolean def;
guint value;
/* g_message("%d get_asn1_int", offset); */
asn1_open(&asn1, asn1_desc, offset);
ret = asn1_header_decode(&asn1, &cls, &con, &tag, &def, &len);
if (ret == ASN1_ERR_NOERROR) {
/* do not check class, both Unversal and Context are OK */
if (con == ASN1_PRI && tag == want_tag) {
if (def) {
asn1_uint32_value_decode(&asn1, len, &value);
return value;
} else
ret = ASN1_ERR_LENGTH_NOT_DEFINITE;
} else
ret = ASN1_ERR_WRONG_TYPE;
}
g_warning("ASN.1 int mismatch at offset %d, %s", offset, asn1_err_to_str(ret));
return 0;
}
static subid_t * /* with prepended length ..... */
get_asn1_oid(guint want_tag, guint offset)
{
ASN1_SCK asn1;
guint ret, cls, con, tag, len;
gboolean def;
subid_t *oid;
/* g_message("%d get_asn1_oid", offset); */
asn1_open(&asn1, asn1_desc, offset);
ret = asn1_header_decode(&asn1, &cls, &con, &tag, &def, &len);
if (ret == ASN1_ERR_NOERROR) {
/* do not check class, both Unversal and Context are OK */
if ((con == ASN1_PRI) && (tag == want_tag)) {
if (def) {
asn1_oid_value_decode(&asn1, len, &oid, &con);
oid = g_realloc(oid, con + sizeof(guint)); /* prepend the length */
memmove(&oid[1], oid, con*sizeof(guint));
oid[0] = con;
return oid;
} else
ret = ASN1_ERR_LENGTH_NOT_DEFINITE;
} else
ret = ASN1_ERR_WRONG_TYPE;
}
g_warning("ASN.1 oid mismatch at offset %d, %s", offset, asn1_err_to_str(ret));
return 0;
}
static guchar * /* 0 terminated string */
get_asn1_string(guint want_tag, guint offset)
{
ASN1_SCK asn1;
guint ret, cls, con, tag, len;
gboolean def;
guchar *octets;
/* g_message("%d get_asn1_string", offset); */
asn1_open(&asn1, asn1_desc, offset);
ret = asn1_header_decode(&asn1, &cls, &con, &tag, &def, &len);
if (ret == ASN1_ERR_NOERROR) {
/* do not check class, both Unversal and Context are OK */
if ((con == ASN1_PRI) && (tag == want_tag)) {
if (def) {
asn1_string_value_decode(&asn1, len, &octets);
octets = g_realloc(octets, len+1); /* need space for sentinel */
octets[len] = 0;
return octets;
} else
ret = ASN1_ERR_LENGTH_NOT_DEFINITE;
} else
ret = ASN1_ERR_WRONG_TYPE;
}
g_warning("ASN.1 string mismatch at offset %d, %s", offset, asn1_err_to_str(ret));
return 0;
}
static guint
get_asn1_uint(guint offset)
{
ASN1_SCK asn1;
guint ret, len, value;
/* g_message( "%d get_asn1_uint", offset); */
asn1_open(&asn1, asn1_desc, offset);
ret = asn1_uint32_decode(&asn1, &value, &len);
if (ret != ASN1_ERR_NOERROR) {
g_warning("ASN.1 uint mismatch at offset %d, %s", offset, asn1_err_to_str(ret));
value = 0;
}
return value;
}
static gboolean
check_tag(guint want_tag, guint offset)
{
ASN1_SCK asn1;
guint ret, cls, con, tag, len;
gboolean def;
asn1_open(&asn1, asn1_desc, offset);
ret = asn1_header_decode(&asn1, &cls, &con, &tag, &def, &len);
if (ret == ASN1_ERR_NOERROR) {
ret = (tag == want_tag) ? TRUE : FALSE;
/* g_message("%d check tag %d, %s", offset, want_tag, ret? "true" : "false"); */
return ret;
}
g_warning("ASN.1 check_tag at offset %d, %s", offset, asn1_err_to_str(ret));
return FALSE;
}
#if 0
static gboolean
constructed(guint offset)
{
ASN1_SCK asn1;
guint ret, cls, con, tag, def, len;
/* g_message("%d constructed?", offset); */
asn1_open(&asn1, asn1_desc, offset);
ret = asn1_header_decode(&asn1, &cls, &con, &tag, &def, &len);
if (ret == ASN1_ERR_NOERROR) {
if (con) {
return TRUE;
}
return FALSE;
}
/* g_warning("ASN.1 constructed? at offset %d, %s", offset, asn1_err_to_str(ret)); */
return FALSE;
}
#endif
static void
define_constraint(GNode *p, GNode *q)
{
TBLRange *range = g_malloc(sizeof(TBLRange));
g_node_append_data(q, range);
range->type = TBLTYPE_Range;
/* g_message("define_constraint %p, %p", p, q); */
p = g_node_first_child(p);
range->from = get_asn1_int(0, GPOINTER_TO_UINT(p->data));
p = g_node_next_sibling(p);
range->to = get_asn1_int(1, GPOINTER_TO_UINT(p->data));
}
static void
define_namednumber(GNode *p, GNode *q)
{
TBLNamedNumber *num = g_malloc(sizeof(TBLNamedNumber));
g_node_append_data(q, num);
num->type = TBLTYPE_NamedNumber;
/* g_message("define_namednumber %p, %p", p, q); */
p = g_node_first_child(p);
num->name = get_asn1_string(0, GPOINTER_TO_UINT(p->data));
p = g_node_next_sibling(p);
num->value = get_asn1_int(1, GPOINTER_TO_UINT(p->data));
}
static void
define_typeref(GNode *p, GNode *q)
{
TBLTypeRef *ref = g_malloc(sizeof(TBLTypeRef));
g_node_append_data(q, ref);
ref->type = TBLTYPE_TypeRef;
/* g_message("define_typeref %p, %p", p, q); */
p = g_node_first_child(p);
ref->typeDefId = get_asn1_uint(GPOINTER_TO_UINT(p->data));
p = g_node_next_sibling(p);
ref->implicit = get_asn1_int(BER_UNI_TAG_BOOLEAN, GPOINTER_TO_UINT(p->data));
}
static void
define_tag(GNode *p, GNode *q)
{
TBLTag *type = g_malloc(sizeof(TBLTag));
g_node_append_data(q, type);
type->type = TBLTYPE_Tag;
/* g_message("define_tag %p, %p", p, q); */
p = g_node_first_child(p);
type->tclass = get_asn1_int(BER_UNI_TAG_ENUMERATED, GPOINTER_TO_UINT(p->data));
p = g_node_next_sibling(p);
type->code = get_asn1_int(BER_UNI_TAG_INTEGER, GPOINTER_TO_UINT(p->data));
}
static void
define_type(GNode *p, GNode *q)
{
GNode *r;
TBLType *type = g_malloc(sizeof(TBLType));
GNode *t = g_node_append_data(q, type);
type->type = TBLTYPE_Type;
/* g_message("define_type %p, %p", p, q); */
type->typeId = get_asn1_int(0, GPOINTER_TO_UINT(p->data));
p = g_node_next_sibling(p);
type->optional = get_asn1_int(1, GPOINTER_TO_UINT(p->data));
p = g_node_next_sibling(p);
if (check_tag(2, GPOINTER_TO_UINT(p->data))) { /* optional, need empty node if not there ?*/
r = g_node_first_child(p);
while (r) {
define_tag(r, t);
r = g_node_next_sibling(r);
}
p = g_node_next_sibling(p);
}
if (!check_tag(3, GPOINTER_TO_UINT(p->data))) {
g_warning("expect tag 3, ERROR");
}
r = g_node_first_child(p);
/* a choice ... */
type->content = TBLTYPETYPE_None;
if (check_tag(0, GPOINTER_TO_UINT(r->data))) type->content = TBLTYPETYPE_Primitive;
if (check_tag(1, GPOINTER_TO_UINT(r->data))) type->content = TBLTYPETYPE_Elements;
if (check_tag(2, GPOINTER_TO_UINT(r->data))) type->content = TBLTYPETYPE_TypeRef;
switch(type->content) {
case TBLTYPETYPE_Primitive:
break;
case TBLTYPETYPE_Elements:
r = g_node_first_child(r);
while (r) {
define_type(g_node_first_child(r), t);
r = g_node_next_sibling(r);
}
break;
case TBLTYPETYPE_TypeRef:
define_typeref(r, t);
break;
case TBLTYPETYPE_None:
g_warning("expected a contents choice, error");
break;
}
p = g_node_next_sibling(p);
type->fieldName = 0;
type->anonymous = FALSE;
if (p && check_tag(4, GPOINTER_TO_UINT(p->data))) {
type->fieldName = get_asn1_string(4, GPOINTER_TO_UINT(p->data));
p = g_node_next_sibling(p);
} else {
type->anonymous = TRUE;
}
type->constraint = FALSE;
if (p && check_tag(5, GPOINTER_TO_UINT(p->data))) {
type->constraint = TRUE;
define_constraint(p, t);
p = g_node_next_sibling(p);
}
if (p && check_tag(6, GPOINTER_TO_UINT(p->data))) {
r = g_node_first_child(p);
while(r) {
define_namednumber(r, t);
r = g_node_next_sibling(r);
}
}
}
static void
define_typedef(GNode *p, GNode *q)
{
TBLTypeDef *type_def = g_malloc(sizeof(TBLTypeDef));
GNode *t = g_node_append_data(q, type_def);
/* g_message("define_typedef %p, %p", p, q); */
type_def->type = TBLTYPE_TypeDef;
p = g_node_first_child(p);
type_def->typeDefId = get_asn1_uint(GPOINTER_TO_UINT(p->data));
p = g_node_next_sibling(p);
type_def->typeName = get_asn1_string(BER_UNI_TAG_PrintableString, GPOINTER_TO_UINT(p->data));
p = g_node_next_sibling(p);
define_type(g_node_first_child(p), t);
p = g_node_next_sibling(p);
type_def->isPdu = (p != 0); /* true if it exists, value ignored */
}
static void
define_module(GNode *p, GNode *q)
{
TBLModule *module = g_malloc(sizeof(TBLModule));
GNode *m = g_node_append_data(q, module);
/* g_message("define_module %p %p", p, q); */
module->type = TBLTYPE_Module;
p = g_node_first_child(p);
module->name = get_asn1_string(0, GPOINTER_TO_UINT(p->data));
p = g_node_next_sibling(p);
module->id = 0;
if (check_tag(1, GPOINTER_TO_UINT(p->data))) { /* optional */
module->id = get_asn1_oid(1, GPOINTER_TO_UINT(p->data));
p = g_node_next_sibling(p);
}
module->isUseful = get_asn1_int(2, GPOINTER_TO_UINT(p->data));
p = g_node_next_sibling(p);
p = g_node_first_child(p);
while (p) {
define_typedef(p, m);
p = g_node_next_sibling(p);
}
}
typedef struct _SearchDef SearchDef;
struct _SearchDef {
const char *key;
GNode *here;
};
static gboolean
is_typedef(GNode *node, gpointer data)
{
TBLTypeDef *d = (TBLTypeDef *)node->data;
SearchDef *s = (SearchDef *)data;
if (d == 0) return FALSE;
if (d->type != TBLTYPE_TypeDef) return FALSE;
if (strcmp(s->key, d->typeName) == 0) {
s->here = node;
return TRUE;
}
return FALSE;
}
typedef struct _TypeRef TypeRef;
struct _TypeRef {
GNode *type;
char *name;
guchar defclass;
guint deftag;
GNode *pdu; /* location in PDU descriptor tree */
guint level; /* recursion counter */
GNode *typetree;
GPtrArray *refs; /* pointers to PDUinfo structures teferencing this entry */
};
typedef struct _NameDefs NameDefs;
struct _NameDefs {
guint max;
guint used;
TypeRef *info;
};
#define ALLOC_INCR 4
#define CLASSREF (BER_CLASS_PRI+1)
static gboolean
is_named(GNode *node, gpointer data)
{
TBLNamedNumber *num = (TBLNamedNumber *)node->data;
NameDefs *n = (NameDefs *)data;
guint oldmax;
if (num == 0) return FALSE;
if (num->type != TBLTYPE_NamedNumber) return FALSE;
if (num->value >= n->max) { /* need larger array */
oldmax = n->max;
n->max = num->value + ALLOC_INCR;
n->info = g_realloc(n->info, n->max * sizeof(TypeRef));
memset(&n->info[oldmax], 0, (n->max - oldmax) * sizeof(TypeRef));
}
if (num->value > n->used) /* track max used value, there may be holes... */
n->used = num->value;
n->info[num->value].name = num->name;
return FALSE;
}
static gboolean
index_typedef(GNode *node, gpointer data)
{
TBLTypeDef *d = (TBLTypeDef *)node->data;
NameDefs *n = (NameDefs *)data;
TypeRef *t;
TBLTag *tag;
guint oldmax;
if (d == 0) return FALSE;
if (d->type != TBLTYPE_TypeDef) return FALSE;
if (d->typeDefId >= n->max) { /* need larger array */
oldmax = n->max;
n->max = d->typeDefId + ALLOC_INCR;
n->info = g_realloc(n->info, n->max * sizeof(TypeRef));
memset(&n->info[oldmax], 0, (n->max - oldmax) * sizeof(TypeRef));
}
if (d->typeDefId > n->used) /* track max used value, there may be holes... */
n->used = d->typeDefId;
t = &(n->info[d->typeDefId]);
t->name = d->typeName;
t->type = node;
t->refs = g_ptr_array_new(); /* collect references here */
node = g_node_first_child(node); /* the real type */
tag = (TBLTag *)node->data;
if ((tag->type == TBLTYPE_Type) && (((TBLType *)tag)->typeId == TBL_CHOICE)) {
/* no reasonable default... ! */
t->defclass = 3; /* Private .... */
t->deftag= 9999; /* a random value */
} else {
node = g_node_first_child(node); /* the default tag */
tag = (TBLTag *)node->data;
switch(tag->type) {
case TBLTYPE_Tag:
t->defclass = tag->tclass;
t->deftag = tag->code;
break;
case TBLTYPE_TypeRef: /* take values from another one, may not be defined yet... */
t->defclass = CLASSREF; /* invalid class.. */
t->deftag = ((TBLTypeRef *)tag)->typeDefId;
break;
default:
g_warning("***** index_typedef: expecting a tag or typeref, found %s *****",
data_types[tag->type]);
t->defclass = 3; /* Private .... */
t->deftag= 9998; /* another random value */
break;
}
}
return FALSE;
}
static TypeRef *typeDef_names = 0;
static guint numTypedefs = 0;
static gboolean
free_node_data(GNode *node, gpointer data _U_)
{
g_free(node->data);
return FALSE;
}
static void
get_values(void) /* collect values from ASN.1 tree */
/* coded according to the tbl.asn1 description of snacc output */
{ /* This routine does not leave references to the tvbuff or */
/* to the asn1_nodes, both can be freed by the caller of this.*/
GNode *p;
SearchDef sd;
NameDefs nd;
guint i;
char X;
const char *t, *s, *E;
static char missing[] = " **missing** ";
if (asn1_verbose) g_message("interpreting tree");
typeDef_names = 0; /* just forget allocated any data .... */
if (data_nodes) {
g_node_traverse(data_nodes, G_POST_ORDER, G_TRAVERSE_ALL, -1,
free_node_data, NULL);
g_node_destroy(data_nodes);
}
data_nodes = g_node_new(0);
p = g_node_first_child(asn1_nodes); /* top of the data tree */
p = g_node_first_child(p);
TT.totalNumModules = get_asn1_uint(GPOINTER_TO_UINT(p->data));
p = g_node_next_sibling(p);
TT.totalNumTypeDefs = get_asn1_uint(GPOINTER_TO_UINT(p->data));
p = g_node_next_sibling(p);
TT.totalNumTypes = get_asn1_uint(GPOINTER_TO_UINT(p->data));
p = g_node_next_sibling(p);
TT.totalNumTags = get_asn1_uint(GPOINTER_TO_UINT(p->data));
p = g_node_next_sibling(p);
TT.totalNumStrings = get_asn1_uint(GPOINTER_TO_UINT(p->data));
p = g_node_next_sibling(p);
TT.totalLenStrings = get_asn1_uint(GPOINTER_TO_UINT(p->data));
p = g_node_next_sibling(p);
p = g_node_first_child(p);
while (p) {
define_module(p, data_nodes);
p = g_node_next_sibling(p);
}
/* g_message("finished with tree"); */
if (!tbl_types_verified) { /* verify snacc TBLTypeId contents */
sd.key = "TBLTypeId";
sd.here = 0;
g_node_traverse(data_nodes, G_PRE_ORDER, G_TRAVERSE_ALL, -1, is_typedef, (gpointer)&sd);
if (asn1_verbose) g_message("%s %sfound, %p", sd.key, sd.here?empty:"not ", sd.here);
if (sd.here) {
nd.max = 8;
nd.used = 0;
nd.info = g_malloc0(nd.max * sizeof(TypeRef));
g_node_traverse(sd.here, G_PRE_ORDER, G_TRAVERSE_ALL, -1, is_named,
(gpointer)&nd);
if (asn1_verbose) g_message("tbltypenames: max=%d, info=%p", nd.max, nd.info);
E = empty;
for (i=0; i<=nd.used; i++) { /* we have entries in addition to snacc's */
X = 'X';
t = TBLTYPE(i);
s = nd.info[i].name;
if (s == 0) s = missing;
if (g_strcmp(t, s) == 0) { /* OK ! */
X = ' ';
t = empty;
} else {
E = ", X with errors X";
}
if (asn1_verbose) g_message(" %c %2d %s %s", X, i, s, t);
}
if (asn1_verbose) g_message("OK, TBLTypeId's index verified%s", E);
}
tbl_types_verified = TRUE;
}
/* build table with typedef names */
nd.max = 8;
nd.used = 0;
nd.info = g_malloc0(nd.max * sizeof(TypeRef));
g_node_traverse(data_nodes, G_PRE_ORDER, G_TRAVERSE_ALL, -1, index_typedef, (gpointer)&nd);
if (asn1_verbose) g_message("tbltypedefs: max=%d, info=%p", nd.max, nd.info);
for (i=0; i<=nd.used; i++) { /* show what we have in the index now */
TypeRef *ref = &(nd.info[i]);
t = ref->name;
if (t == 0) {
t = ref->name = missing;
if (asn1_verbose) g_message(" %3d %s", i, t);
} else {
if (asn1_verbose) g_message(" %3d %s, %c%d", i, t,
tag_class[ref->defclass], ref->deftag);
}
if (ref->pdu) { /* should be 0 */
if (asn1_verbose) g_message("* %3d %s pdu=%p", i, t, ref->pdu);
}
}
typeDef_names = nd.info;
numTypedefs = i;
if (asn1_verbose) g_message("OK, %d TBLTypeDef's index set up", numTypedefs);
}
static void
showGNode(GNode *p, int n)
{
const char *fn, *s = empty;
if (p == 0) return;
n *=2; /* 2 spaces per level */
if (p->data) { /* show value ... */
/* g_message("show %p, type %d", p, ((TBLTag *)p->data)->type); */
switch (((TBLTag *)p->data)->type) {
case TBLTYPE_Module: {
TBLModule *m = (TBLModule *)p->data;
if (asn1_verbose)
g_message("%*smodule %s%s", n, empty, m->name,
m->isUseful ? ", useful" : empty);
};
break;
case TBLTYPE_TypeDef: {
TBLTypeDef *t = (TBLTypeDef *)p->data;
if (asn1_verbose)
g_message("%*stypedef %d %s%s", n, empty, t->typeDefId, t->typeName,
t->isPdu ? ", isPDU" : empty);
};
break;
case TBLTYPE_Type: {
TBLType *t = (TBLType *)p->data;
if (t->fieldName)
s = t->fieldName;
/* typeId is a value from enum TBLTypeId */
fn = TBLTYPE(t->typeId);
if (asn1_verbose) g_message("%*stype %d[%s]%s [%s]", n, empty, t->typeId, fn,
t->optional ? " opt" : empty, s );
};
break;
case TBLTYPE_Tag: {
TBLTag *t = (TBLTag *)p->data;
if ((t->tclass == BER_CLASS_UNI) && (t->code < 32))
s = asn1_tag[t->code];
if (asn1_verbose) g_message("%*stag %c%d[%s]", n, empty,
tag_class[t->tclass], t->code, s);
};
break;
case TBLTYPE_NamedNumber: {
TBLNamedNumber *nn = (TBLNamedNumber *)p->data;
if (asn1_verbose) g_message("%*snamednumber %2d %s", n, empty,
nn->value, nn->name);
};
break;
case TBLTYPE_Range: {
TBLRange *r = (TBLRange *)p->data;
if (asn1_verbose) g_message("%*srange %d .. %d", n, empty,
r->from, r->to );
};
break;
case TBLTYPE_TypeRef: {
TBLTypeRef *r = (TBLTypeRef *)p->data;
if (typeDef_names)
s = typeDef_names[r->typeDefId].name;
if (asn1_verbose) g_message("%*styperef %d[%s]%s", n, empty,
r->typeDefId, s, r->implicit ? ", implicit" : empty );
};
break;
default: {
TBLTag *x = (TBLTag *)p->data;
if (asn1_verbose) g_message("%*s--default-- type=%d", n, empty, x->type);
};
break;
}
} else { /* just show tree */
if (asn1_verbose)
g_message("%*snode=%p, data=%p, next=%p, prev=%p, parent=%p, child=%p",
n, empty, p, p->data, p->next, p->prev, p->parent, p->children);
}
}
static void
showGNodes(GNode *p, int n)
{
if (p == 0) return;
showGNode(p, n);
showGNodes(p->children, n+1);
showGNodes(p->next, n);
}
#if 0
static void showGenv(GNode *p, int n, int m)
{
int i;
if (p == 0) return;
if (n > m) {
if (asn1_verbose) g_message("%*s.....", n*2, empty);
return;
}
for(i=0; p && (i < 3); p = p->next, i++) {
showGNode(p, n);
showGenv(p->children, n+1, m);
}
if (p && asn1_verbose) g_message("%*s.....", n*2, empty);
}
#endif
static void
debug_dump_TT(void) /* dump contents of TT struct, for debugging */
{
if (asn1_verbose)
g_message("modules=%d, defs=%d, types=%d, tags=%d, strings=%d, lenstrings=%d",
TT.totalNumModules,
TT.totalNumTypeDefs,
TT.totalNumTypes,
TT.totalNumTags,
TT.totalNumStrings,
TT.totalLenStrings);
}
static void
my_log_handler(const gchar *log_domain, GLogLevelFlags log_level,
const gchar *message, gpointer user_data)
{
static FILE* logf = 0;
static char eol[] = "\r\n";
(void) log_domain; (void) log_level; (void) user_data; /* make references */
if (logf == NULL && asn1_logfile) {
logf = ws_fopen(asn1_logfile, "w");
}
if (logf) {
fputs(message, logf);
fputs(eol, logf);
fflush(logf); /* debugging ... */
}
}
static void
read_asn1_type_table(const char *filename)
{
FILE *f;
guint size;
guchar *data;
struct stat stat;
static guint mylogh = 0;
if ((filename == 0) || (strlen(filename) == 0))
return; /* no filename provided */
f = ws_fopen(filename, "rb");
if (f == 0) {
/*
* Ignore "file not found" errors if it's the old default
* ASN.1 file name, as we never shipped such a file.
* Also, on Win32, ignore the earlier default, which
* had a "/" rather than a "\" as the last pathname
* separator.
*/
#ifdef _WIN32
if (strcmp(filename, bad_separator_old_default_asn1_filename) != 0)
#endif
if ((strcmp(filename, old_default_asn1_filename) != 0) || errno != ENOENT)
report_open_failure(filename, errno, FALSE);
return;
}
fstat(fileno(f), &stat);
size = (int)stat.st_size;
if (size == 0) {
if (asn1_verbose) g_message("file %s is empty, ignored", filename);
fclose(f);
return;
}
if (asn1_verbose) g_message("reading %d bytes from %s", size, filename);
data = g_malloc(size);
if (fread(data, size, 1, f) < 1) {
g_warning("error reading %s, %s", filename, strerror(errno));
}
fclose(f);
if (asn1_verbose) {
/* ***** from the time when logging was just in a console... *****
* g_message("******* Type ^S and change console buffer size to 9999 and type ^Q *******\n"
* " Sleep 5 sec...");
* Sleep(5 * 1000);
*/
g_message("logging to file %s", asn1_logfile);
if (mylogh == 0) {
mylogh = g_log_set_handler (NULL, G_LOG_LEVEL_MASK | G_LOG_FLAG_FATAL
| G_LOG_FLAG_RECURSION, my_log_handler, NULL);
}
}
asn1_desc = tvb_new_real_data(data, size, size);
tt_build_tree();
if (asn1_verbose) g_message("read %d items from %s", icount, filename);
#if 0
list_modules();
#endif
get_values();
g_node_destroy(asn1_nodes); asn1_nodes = 0;
#ifndef _WIN32 /* tvb_free not yet exported to plugins... */
tvb_free(asn1_desc);
#endif
asn1_desc = 0;
g_free(data); data = 0;
showGNodes(data_nodes, 0);
debug_dump_TT();
}
/* XXX - Shoudn't we make sure we're not dereferencing a NULL pointer here? */
#define CHECKTYPE(p,x) {if (((TBLTag *)(p)->data)->type != (x)) \
g_warning("**** unexpected type %s, want %s, at line %d", \
data_types[((TBLTag *)p->data)->type], data_types[(x)], __LINE__);}
static void
save_reference(PDUinfo *p)
{
gint i = p->mytype;
if (i == -1)
i = p->basetype;
g_ptr_array_add(typeDef_names[i].refs, (gpointer)p);
}
static void
tbl_type(guint n, GNode *pdu, GNode *list, guint fullindex);
/* evaluate typeref, pointer to current pdu node and typedef */
static void
tbl_typeref(guint n, GNode *pdu, GNode *tree, guint fullindex)
{
GNode *q;
PDUinfo *p = (PDUinfo *)pdu->data, *p1;
guint nvals;
value_string *v;
char ss[128];
int i;
if (n > 40) { /* don't believe this....! ...... stop recursion ...... */
g_warning("****tbl_typeref: n>40, return [recursion too deep] ****************");
return;
}
CHECKTYPE(tree, TBLTYPE_TypeDef);
if (asn1_verbose) g_message("%*s+tbl_typeref %s [%s, tag %c%d]", n*2, empty,
p->name, TBLTYPE(p->type), tag_class[p->tclass], p->tag);
p->typenum = ((TBLTypeDef *)tree->data)->typeDefId; /* name of current type */
p->flags |= PDU_TYPEDEF;
tree = g_node_first_child(tree); /* move to its underlying type */
CHECKTYPE(tree, TBLTYPE_Type);
p->type = ((TBLType *)tree->data)->typeId;
q = g_node_first_child(tree); /* the tag of this type entry ... is optional... */
if (((TBLTag *)q->data)->type == TBLTYPE_Tag) {
if ((p->flags & PDU_IMPLICIT) == 0) { /* not implicit, use this tag */
guint xcls, xtag;
xcls = p->tclass;
xtag = p->tag;
/* XXX -- hack -- hack -- hack -- hack -- hack --
* only change tag when class+tag == EOC,
* or class is a reference,
* or new class is not universal.
*/
if ( ((xcls|xtag) == 0) || (xcls == CLASSREF) ||
(((TBLTag *)q->data)->tclass != BER_CLASS_UNI) ) {
p->tclass = ((TBLTag *)q->data)->tclass;
p->tag = ((TBLTag *)q->data)->code;
if (asn1_verbose)
g_message("%*s*change typeref tag from %c%d to %c%d",
n*2, empty,
tag_class[xcls],
xtag,
tag_class[p->tclass],
p->tag);
} else {
if (asn1_verbose)
g_message("%*sNOT changing tag from %c%d to %c%d",
n*2, empty,
tag_class[xcls],
xtag,
tag_class[((TBLTag *)q->data)->tclass],
((TBLTag *)q->data)->code);
}
}
} else {
ss[0] = 0;
if (p->tclass==CLASSREF)
g_snprintf(ss, 128, ", CLASSREF %d", p->tag);
if (asn1_verbose) g_message("%*sno typeref tag%s", n*2, empty, ss);
if (p->tclass==CLASSREF) {
TypeRef *tr;
i = p->basetype;
/* CLASSREF....., get it defined using type of the reference */
/* p->basetype may be -1 .... ? XXX */
if (i == -1)
i = p->tag;
tr = &typeDef_names[i];
if (asn1_verbose)
g_message("%*s*refer2 to type#%d %s, %p", n*2, empty,
p->tag, tr->name, tr->pdu);
tbl_typeref(n+1, pdu, tr->type, fullindex);
return;
}
}
if (asn1_verbose)
g_message("%*sinclude typedef %d %s %s [%p:%s, tag %c%d]", n*2, empty, p->typenum,
p->name, p->typename, p, TBLTYPE(p->type), tag_class[p->tclass], p->tag);
switch(p->type) {
case TBL_BITSTRING:
case TBL_ENUMERATED:
/* names do not have a fullname */
if (asn1_verbose) g_message("%*s*collection T %s", n*2, empty, p->name);
/* read the enumeration [save min-max somewhere ?] */
p->value_hf.hfinfo.type = tbl_types_wireshark[p->type]; /* XXX change field type... */
proto_register_field_array(proto_asn1, &(p->value_hf) , 1);
save_reference(p);
if (asn1_verbose)
g_message("regtype1: %3d %3d [%3d] F%2.2x (%s)%s %s %s -> id=%d",
p->mytype, p->typenum, p->basetype, p->flags, p->typename,
p->name, p->fullname,
tbl_types_wireshark_txt[p->type], p->value_id);
p1 = p;
nvals = 0;
while((q = g_node_next_sibling(q))) {
CHECKTYPE(q, TBLTYPE_NamedNumber);
p = g_malloc0(sizeof(PDUinfo));
nvals++;
p->type = TBL_ENUMERATED;
p->name = (((TBLNamedNumber *)q->data)->name);
p->tag = (((TBLNamedNumber *)q->data)->value);
p->flags = PDU_NAMEDNUM;
if (asn1_verbose) g_message("%*s %3d %s", n*2, empty, p->tag, p->name);
g_node_append_data(pdu, p);
}
/* list all enum values in the field structure for matching */
p1->value_hf.hfinfo.strings = v = g_malloc0((nvals+1) * sizeof(value_string));
q = g_node_first_child(pdu);
nvals = 0;
while(q) {
p = (PDUinfo *)q->data;
v[nvals].value = p->tag;
v[nvals].strptr = p->name;
/* g_message("enumval2: %d %s %d %s %s", nvals, p1->name, p->tag, p->name, tbl_types_asn1[p1->type]); */
nvals++;
q = g_node_next_sibling(q);
}
/* last entry is already initialized to { 0, NULL } */
break;
case TBL_CHOICE:
if (p->value_id == -1) { /* not yet registered ..... */
p->value_hf.hfinfo.type = tbl_types_wireshark[p->type];
proto_register_field_array(proto_asn1, &(p->value_hf) , 1);
save_reference(p);
if (asn1_verbose)
g_message("regtype2: %3d %3d [%3d] F%2.2x (%s)%s %s %s -> id=%d",
p->mytype, p->typenum, p->basetype, p->flags, p->typename,
p->name, p->fullname,
tbl_types_wireshark_txt[p->type], p->value_id);
}
tbl_type(n, pdu, q, fullindex);
break;
default:
if (p->value_id == -1) { /* not yet registered ..... */
p->value_hf.hfinfo.type = tbl_types_wireshark[p->type];
proto_register_field_array(proto_asn1, &(p->value_hf) , 1);
save_reference(p);
if (asn1_verbose)
g_message("regtype3: %3d %3d [%3d] F%2.2x (%s)%s %s %s -> id=%d",
p->mytype, p->typenum, p->basetype, p->flags, p->typename,
p->name, p->fullname,
tbl_types_wireshark_txt[p->type], p->value_id);
}
tbl_type(n, pdu, g_node_next_sibling(q), fullindex);
}
}
static void
tbl_type(guint n, GNode *pdu, GNode *list, guint fullindex) /* indent, pdu, source type node list */
{
GNode *q, *pdu1;
PDUinfo *p, *p1;
guint ni;
guint nvals;
value_string *v;
if (n > 40) { /* don't believe this....! ...... stop recursion ...... */
g_warning("****tbl_type: n>40, return [recursion too deep] ****************");
return;
}
/* showGenv(list, n, n+1); */
ni = fullindex;
pdu1 = pdu; /* save start location for append */
while (list) { /* handle all entries */
if (asn1_verbose)
g_message("%*s+handle a %s, list=%p", n*2, empty,
data_types[((TBLTag *)list->data)->type], list);
if (((TBLTag *)list->data)->type == TBLTYPE_Range) { /* ignore this ..... */
list = g_node_next_sibling(list);
if (asn1_verbose) g_message("%*s*skip range", n*2, empty);
if (list == 0)
break;
}
/******* change to positive comparation, but leave comment for reference
* if (((TBLTag *)list->data)->type != TBLTYPE_TypeRef) {
* CHECKTYPE(list, TBLTYPE_Type);
*/
if (((TBLTag *)list->data)->type == TBLTYPE_Type) {
CHECKTYPE(list, TBLTYPE_Type);
p = g_malloc0(sizeof(PDUinfo));
pdu = g_node_append_data(pdu1, p);
p->type = ((TBLType *)list->data)->typeId;
p->typename = tbl_types_asn1[p->type]; /* the default type */
p->typenum = -1;
p->mytype = -1;
p->basetype = ((PDUinfo *)pdu1->data)->typenum;
p->flags = PDUinfo_initflags;
p->flags |= (((TBLType *)list->data)->anonymous ? PDU_ANONYMOUS : 0);
p->flags |= (((TBLType *)list->data)->optional ? PDU_OPTIONAL : 0);
if (((TBLType *)list->data)->fieldName == 0) { /* no name assigned */
/* assign an anonymous name [XXX refer to parent typename...] */
((TBLType *)list->data)->fieldName =
g_strdup_printf("anon%d", anonCount++);
}
p->name = ((TBLType *)list->data)->fieldName;
ni = fullindex;
ni += g_snprintf(&fieldname[ni], sizeof(fieldname) - ni, ".%s", p->name);
p->fullname = g_strdup(fieldname);
/* initialize field info */
p->value_id = -1;
p->type_id = -1;
p->value_hf.p_id = &(p->value_id);
p->value_hf.hfinfo.name = p->fullname;
p->value_hf.hfinfo.abbrev = p->fullname;
p->value_hf.hfinfo.type = tbl_types_wireshark[p->type];
p->value_hf.hfinfo.display = BASE_DEC;
p->value_hf.hfinfo.blurb = p->fullname;
/* all the other fields are already 0 ! */
if (p->type < TBL__SIMPLE) {
/* only register fields with a value here, postpone others */
proto_register_field_array(proto_asn1, &(p->value_hf) , 1);
save_reference(p);
if (asn1_verbose)
g_message("register: %3d %3d [%3d] F%2.2x (%s)%s %s %s -> id=%d",
p->mytype, p->typenum, p->basetype, p->flags,
p->typename, p->name, p->fullname,
tbl_types_wireshark_txt[p->type], p->value_id);
}
q = g_node_first_child(list);
} else {
p = (PDUinfo *)pdu->data;
q = list;
}
if (asn1_verbose) g_message("%*s*switch %s %s", n*2, empty, p->name, TBLTYPE(p->type));
switch (p->type) {
case TBL_BOOLEAN:
case TBL_INTEGER:
case TBL_OCTETSTRING:
case TBL_NULL:
case TBL_OID:
case TBL_REAL:
CHECKTYPE(q, TBLTYPE_Tag);
p->tclass = ((TBLTag *)q->data)->tclass;
p->tag = ((TBLTag *)q->data)->code;
break;
case TBL_BITSTRING:
case TBL_ENUMERATED:
CHECKTYPE(q, TBLTYPE_Tag);
p->tclass = ((TBLTag *)q->data)->tclass;
p->tag = ((TBLTag *)q->data)->code;
if (asn1_verbose) g_message("%*s*collection %s", n*2, empty, p->name);
/* read the enumeration [save min-max somewhere ?] */
nvals = 0;
p1 = p;
while((q = g_node_next_sibling(q))) {
CHECKTYPE(q, TBLTYPE_NamedNumber);
p = g_malloc0(sizeof(PDUinfo));
nvals++;
p->type = TBL_ENUMERATED;
p->name = (gchar *)(((TBLNamedNumber *)q->data)->name);
p->tag = (((TBLNamedNumber *)q->data)->value);
p->flags = PDU_NAMEDNUM;
if (asn1_verbose) g_message("%*s %3d %s", n*2, empty, p->tag, p->name);
g_node_append_data(pdu, p);
}
/* list all enum values in the field structure for matching */
p1->value_hf.hfinfo.strings = v = g_malloc0((nvals+1) * sizeof(value_string));
q = g_node_first_child(pdu);
nvals = 0;
while(q) {
p = (PDUinfo *)q->data;
v[nvals].value = p->tag;
v[nvals].strptr = p->name;
/* g_message("enumval1: %d %s %d %s", nvals, p1->name, p->tag, p->name); */
nvals++;
q = g_node_next_sibling(q);
}
/* last entry is already initialized to { 0, NULL } */
break;
case TBL_SEQUENCE:
case TBL_SET:
case TBL_SEQUENCEOF:
case TBL_SETOF:
case TBL_CHOICE:
CHECKTYPE(q, TBLTYPE_Tag);
q = g_node_first_child(list);
tbl_type(n+1, pdu, q, ni);
break;
case TBL_TYPEREF: { /* may have a tag ... */
TypeRef *tr;
guint i;
if(!q){
break;
}
if ( ((TBLTag *)q->data)->type == TBLTYPE_Tag) {
if ((p->flags & PDU_IMPLICIT) == 0) { /* not implicit, use this tag */
p->tclass = ((TBLTag *)q->data)->tclass;
p->tag = ((TBLTag *)q->data)->code;
if (asn1_verbose)
g_message("%*s*insert type tag %c%d", n*2, empty,
tag_class[p->tclass], p->tag);
}
q = g_node_next_sibling(q);
} else { /* use default tag for this type */
tr = &typeDef_names[((TBLTypeRef *)q->data)->typeDefId];
if ((((p->flags & PDU_IMPLICIT) == 0) && (tr->defclass != BER_CLASS_UNI)) ||
((p->tclass | p->tag) == 0 )) {
/* not implicit, use this tag */
p->tclass = tr->defclass;
p->tag = tr->deftag;
if (asn1_verbose) g_message("%*s*set tag %c%d", n*2, empty,
tag_class[p->tclass], p->tag);
}
}
CHECKTYPE(q, TBLTYPE_TypeRef);
i = ((TBLTypeRef *)q->data)->typeDefId;
p->mytype = i;
tr = &typeDef_names[i];
if (asn1_verbose)
g_message("%*s*type#%d %s, %p", n*2, empty, i, tr->name, tr->pdu);
p->typename = tr->name;
if (tr->defclass == CLASSREF) {
if (tr->pdu == 0)
tr->pdu = pdu; /* remember this reference */
i = tr->deftag;
tr = &typeDef_names[i];
if (asn1_verbose)
g_message("%*s*refer to type#%d %s, %p", n*2, empty,
i, tr->name, tr->pdu);
}
/* evaluate reference if not done before or when below recursion limit */
if ((tr->pdu == 0) || (tr->level < type_recursion_level)) {
tr->level++;
if (tr->pdu == 0) {
tr->pdu = pdu; /* save for references we leave */
}
p->flags |= ((TBLTypeRef *)q->data)->implicit? PDU_IMPLICIT : 0;
if (asn1_verbose)
g_message("%*s*typeref %s > %s%s at %p", n*2, empty,
p->name,
((TBLTypeRef *)q->data)->implicit?"implicit ":empty,
tr->name,
pdu);
tbl_typeref(n+1, pdu, tr->type, ni);
tr->level--;
} else {
if (asn1_verbose)
g_message("%*s*typeref %s > %s already at %p", n*2, empty,
p->name, tr->name, tr->pdu);
p->flags |= PDU_REFERENCE;
p->reference = tr->pdu;
}
};
break;
default:
g_warning("**** unknown tbl-type %d at line %d", p->type, __LINE__);
break;
}
if (asn1_verbose)
g_message("%*sinclude type %s %s [%p:%s, tag %c%d]",
n*2, empty, p->name, p->typename, p, TBLTYPE(p->type),
tag_class[p->tclass], p->tag);
if (p->value_id == -1) { /* not registered before, do it now */
proto_register_field_array(proto_asn1, &(p->value_hf) , 1);
save_reference(p);
if (asn1_verbose)
g_message("regist-2: %3d %3d [%3d] F%2.2x (%s)%s %s %s -> id=%d",
p->mytype, p->typenum, p->basetype, p->flags, p->typename,
p->name, p->fullname,
tbl_types_wireshark_txt[p->type], p->value_id);
}
list = g_node_next_sibling(list);
}
}
static void
PDUtext(char *txt, PDUinfo *info) /* say everything we know about this entry */
{
PDUinfo *rinfo;
const char *tt, *nn, *tn, *fn, *oo, *ii, *an, *tr, *ty;
if (info) {
tt = TBLTYPE(info->type);
nn = info->name;
tn = info->typename;
fn = info->fullname;
if (info->flags & PDU_NAMEDNUM)
txt += g_sprintf(txt, "name: %2d %s", info->tag, nn);
else {
if (info->flags & PDU_TYPEDEF)
txt += g_sprintf(txt, "def %d: ", info->typenum);
else
txt += g_sprintf(txt, " ");
ty = (info->flags & PDU_TYPETREE) ? "typ" : "val";
txt += g_sprintf(txt, "%s %s (%s)%s [%s] tag %c%d hf=%d tf=%d",ty,tt, tn, nn, fn,
tag_class[info->tclass], info->tag, info->value_id, info->type_id);
txt += g_sprintf(txt, ", mt=%d, bt=%d", info->mytype, info->basetype);
oo = (info->flags & PDU_OPTIONAL) ? ", optional" : empty;
ii = (info->flags & PDU_IMPLICIT) ? ", implicit" : empty;
nn = (info->flags & PDU_NAMEDNUM) ? ", namednum" : empty;
an = (info->flags & PDU_ANONYMOUS) ? ", anonymous" : empty;
txt += g_sprintf(txt, "%s%s%s%s", oo, ii, nn, an);
if (info->flags & PDU_REFERENCE) {
rinfo = (PDUinfo *)((GNode *)(info->reference))->data;
tt = TBLTYPE(rinfo->type);
nn = rinfo->name;
tn = rinfo->typename;
fn = rinfo->fullname;
txt += g_sprintf(txt, ", reference to %s (%s)%s [%s]", tt, tn, nn, fn);
if (rinfo->flags & PDU_TYPEDEF)
txt += g_sprintf(txt, " T%d", rinfo->typenum);
txt += g_sprintf(txt, " tag %c%d", tag_class[rinfo->tclass], rinfo->tag);
oo = (rinfo->flags & PDU_OPTIONAL) ? ", optional" : empty;
ii = (rinfo->flags & PDU_IMPLICIT) ? ", implicit" : empty;
nn = (rinfo->flags & PDU_NAMEDNUM) ? ", namednum" : empty;
tn = (rinfo->flags & PDU_REFERENCE) ? ", reference" : empty;
tt = (rinfo->flags & PDU_TYPEDEF) ? ", typedef" : empty;
an = (rinfo->flags & PDU_ANONYMOUS) ? ", anonymous" : empty;
tr = (rinfo->flags & PDU_TYPETREE) ? ", typetree" : empty;
txt += g_sprintf(txt, "%s%s%s%s%s%s%s", oo, ii, nn, tn, tt, an, tr);
}
}
} else {
strncpy(txt, "no info available", 20);
}
return;
}
static void
showPDUtree(GNode *p, int n)
{
PDUinfo *info;
char text[400];
while (p != 0) {
info = (PDUinfo *)p->data;
PDUtext(text, info);
if (asn1_verbose) g_message("%*s%s", n*2, empty, text);
showPDUtree(g_node_first_child(p), n+1);
p = g_node_next_sibling(p);
}
return;
}
static gboolean
build_pdu_tree(const char *pduname)
{
SearchDef sd;
guint pdudef, i, tcount;
guint sav_len;
PDUinfo *info;
char text[400];
guint j, k;
gint defid;
PDUinfo *p, *q;
TypeRef *tr;
if (asn1_verbose) g_message("build msg tree from '%s' for '%s'", current_asn1, pduname);
if (!data_nodes) {
if (asn1_verbose) g_message("no data nodes");
return FALSE;
}
sd.key = pduname;
sd.here = 0;
g_node_traverse(data_nodes, G_PRE_ORDER, G_TRAVERSE_ALL, -1, is_typedef, (gpointer)&sd);
if (sd.here) {
pdudef = ((TBLTypeDef *)(sd.here->data))->typeDefId;
if (asn1_verbose) g_message("%s found, %p, typedef %d", sd.key, sd.here, pdudef);
} else {
if (asn1_verbose) g_message("%s not found, ignored", sd.key);
return FALSE;
}
/* If there's an existing PDU tree, free it */
if (PDUtree) {
g_node_traverse(PDUtree, G_POST_ORDER, G_TRAVERSE_ALL, -1,
free_node_data, NULL);
g_node_destroy(PDUtree);
}
/* initialize the PDU tree, hand craft the root entry */
info = g_malloc0(sizeof(PDUinfo));
info->name = pduname;
info->typename = pduname;
info->type = TBL_SEQUENCEOF;
info->fullname = g_strdup_printf("%s.%s", pabbrev, pduname);
info->flags = PDUinfo_initflags = 0;
info->value_id = -1;
info->type_id = -1;
info->basetype = -1;
info->mytype = pdudef;
info->value_hf.p_id = &(info->value_id);
info->value_hf.hfinfo.name = info->fullname;
info->value_hf.hfinfo.abbrev = info->fullname;
info->value_hf.hfinfo.type = tbl_types_wireshark[info->type];
info->value_hf.hfinfo.display = BASE_DEC;
info->value_hf.hfinfo.blurb = info->fullname;
anonCount = 0; /* anonymous types counter */
PDUtree = g_node_new(info);
pabbrev_pdu_len = g_sprintf(fieldname, "%s.%s.", pabbrev, pduname);
sav_len = pabbrev_pdu_len;
/* Now build the tree for this top level PDU */
if (asn1_verbose)
g_message("******** Define main type %d, %s", pdudef, pduname);
tbl_typeref(0, PDUtree, sd.here, pabbrev_pdu_len-1); /* strip initial . for new names */
if (asn1_verbose)
g_message("%d anonymous types", anonCount);
/* Now make all types used available for matching */
if (asn1_verbose)
g_message("Define the types that are actually referenced through the top level PDU");
for (i=0, tcount=0; i<numTypedefs; i++) {
tr = &(typeDef_names[i]);
if (tr->pdu) { /* ignore if not used in main pdu */
tcount++;
if (i == pdudef)
g_warning("pdu %d %s defined twice, TopLevel & type", pdudef, pduname);
if (asn1_verbose)
g_message("******** Define type %d, %s", i, tr->name);
/* .... do definition ..... */
info = g_malloc0(sizeof(PDUinfo));
info->name = tr->name;
info->typename = tr->name;
info->tclass = tr->defclass;
info->tag = tr->deftag;
info->type = TBL_TYPEREF;
info->fullname = g_strdup_printf("%s.--.%s", pabbrev, tr->name);
info->flags = PDUinfo_initflags = PDU_TYPETREE;
info->value_id = -1;
info->type_id = -1;
info->basetype = -1;
info->mytype = i;
info->value_hf.p_id = &(info->value_id);
info->value_hf.hfinfo.name = info->fullname;
info->value_hf.hfinfo.abbrev = info->fullname;
info->value_hf.hfinfo.type = tbl_types_wireshark[info->type];
info->value_hf.hfinfo.display = BASE_DEC;
info->value_hf.hfinfo.blurb = info->fullname;
tr->typetree = g_node_new(info);
pabbrev_pdu_len = g_sprintf(fieldname, "%s.--.%s.", pabbrev, tr->name);
tbl_typeref(0, tr->typetree, tr->type, pabbrev_pdu_len-1);
}
}
if (asn1_verbose)
g_message("%d types used", tcount);
pabbrev_pdu_len = sav_len;
/* and show the result */
if (asn1_verbose)
g_message("Type index:");
for (i=0; i<numTypedefs; i++) {
tr = &(typeDef_names[i]);
if (tr->pdu == 0) /* skip if not used */
continue;
if (asn1_verbose)
g_message(" %3d %s, %c%d, refs: %d",
i, tr->name, tag_class[tr->defclass], tr->deftag,
g_ptr_array_len(tr->refs));
/* get defining node for this type */
defid = -1;
if (tr->typetree) {
p = (PDUinfo *)(tr->typetree->data);
defid = p->value_id;
if (asn1_verbose)
g_message(" -- defining id=%d", defid);
}
for(j=0; j < g_ptr_array_len(tr->refs); j++) { /* show refs, and set type_id */
p = (PDUinfo *)g_ptr_array_index(tr->refs, j);
if (p->mytype == (gint)i)
p->type_id = defid; /* normal reference */
else {
if ((p->flags & PDU_TYPETREE) == 0) {
/* we have a primitive value, find its real type */
for(k=0; k < g_ptr_array_len(tr->refs); k++) {
/* look at all refs */
q = (PDUinfo *)g_ptr_array_index(tr->refs, k);
if ((q->flags & PDU_TYPETREE) == 0)
continue; /* only type trees are interresting */
if (q->type != p->type)
continue; /* must be same types */
if (strcmp(q->name, p->name) == 0) {
/* OK, take the first we find, not entirely
* correct, it may be from a different
* base-base type...... XXX */
p->type_id = q->value_id;
break;
}
}
}
}
if (asn1_verbose) {
PDUtext(text, p);
g_message(" %s", text);
}
}
}
if (asn1_verbose)
g_message("The resulting PDU tree:");
showPDUtree(PDUtree, 0);
return TRUE;
}
#ifdef DISSECTOR_WITH_GUI
/* This cannot work in tshark.... don't include for now */
#define SHOWPDU
#endif /* DISSECTOR_WITH_GUI */
#ifdef SHOWPDU
static GtkWidget *window = NULL;
/* the columns in the tree view */
enum
{
TITLE_COLUMN, /* text in this row */
DEF_COLUMN, /* definition in this row, if any */
REF_COLUMN, /* referennce from this column, if any */
VALUE_COLUMN, /* indicate this is a value */
NAME_COLUMN, /* name of this row */
N_COLUMNS
};
static FILE *namelist = 0;
static void
build_tree_view(GtkTreeStore *store, GNode *p, GtkTreeIter *iter)
{
GtkTreeIter iter2;
PDUinfo *info, *rinfo;
gint def, ref;
guchar *pb;
char text[400];
while (p != 0) {
info = (PDUinfo *)p->data;
gtk_tree_store_append (store, &iter2, iter); /* Acquire iterator */
PDUtext(text, info);
def = ref = -1;
if (info->flags & PDU_TYPEDEF)
def = info->typenum;
if (info->flags & PDU_REFERENCE) {
rinfo = (PDUinfo *)((GNode *)(info->reference))->data;
ref = rinfo->typenum;
}
pb = GTK_STOCK_CANCEL;
if (G_NODE_IS_LEAF(p)) {
if (info->flags & PDU_NAMEDNUM)
pb = GTK_STOCK_BOLD;
else {
pb = GTK_STOCK_YES;
if (namelist)
fprintf(namelist, "%16s %s\n",
&(TBLTYPE(info->type)[4]), info->fullname);
}
} else {
switch (info->type) {
case TBL_ENUMERATED:
case TBL_BITSTRING:
pb = GTK_STOCK_ADD;
if (namelist)
fprintf(namelist, "%16s %s\n",
&(TBLTYPE(info->type)[4]), info->fullname);
break;
default:
break;
}
}
gtk_tree_store_set (store, &iter2,
TITLE_COLUMN, text,
DEF_COLUMN, def,
REF_COLUMN, ref,
VALUE_COLUMN, pb,
NAME_COLUMN, info->fullname,
-1);
build_tree_view(store, g_node_first_child(p), &iter2);
p = g_node_next_sibling(p);
}
return;
}
struct DefFind {
gint def;
GtkTreePath *path;
};
#define PATHSTACKMAX 10
static GtkTreePath *pathstack[PATHSTACKMAX];
static gint pathstackp = 0;
static void add_path(GtkTreePath *p)
{
if (pathstackp >= PATHSTACKMAX) { /* shift old contents */
gtk_tree_path_free(pathstack[0]); /* we forget about this one */
memmove(&pathstack[0], &pathstack[1], (PATHSTACKMAX-1)*sizeof(GtkTreePath *));
pathstackp--;
}
pathstack[pathstackp++] = p;
}
static GtkTreePath *pop_path(void)
{
if (pathstackp > 0)
return pathstack[--pathstackp];
return 0;
}
static gboolean
find_definition(GtkTreeModel *model, GtkTreePath *path, GtkTreeIter *iter, gpointer data)
{
gint def;
struct DefFind *df = (struct DefFind *)data;
gtk_tree_model_get (model, iter, DEF_COLUMN, &def, -1);
if (def == df->def) {
df->path = gtk_tree_path_copy (path);
return TRUE;
}
return FALSE;
}
static void
my_signal_handler(GtkTreeView *treeview, GtkTreePath *spath, GtkTreeViewColumn *arg2, gpointer model)
{
GtkTreeIter iter;
GtkTreePath *path, *path2;
gchar *text, *oldpath, *newpath;
gint def, ref;
struct DefFind df;
(void) arg2;
path = gtk_tree_path_copy (spath);
gtk_tree_model_get_iter (model, &iter, path);
gtk_tree_model_get (model, &iter, TITLE_COLUMN, &text, DEF_COLUMN, &def, REF_COLUMN, &ref, -1);
oldpath = gtk_tree_path_to_string(path);
path2 = gtk_tree_path_copy (path);
add_path(gtk_tree_path_copy(path));
if (ref != -1) { /* this is a reference, find matching definition */
df.def = ref;
df.path = 0;
gtk_tree_model_foreach (model, find_definition, &df);
if (df.path) {
gtk_tree_path_free(path);
path = df.path;
}
} else { /* just move to the next entry, if it exists */
gtk_tree_path_next(path2);
if (gtk_tree_model_get_iter (model, &iter, path2)) {
gtk_tree_path_free(path);
path = path2; /* OK */
} else {
if (gtk_tree_path_get_depth (path) > 1)
gtk_tree_path_up (path);
}
}
if (path != path2)
gtk_tree_path_free (path2);
gtk_tree_view_expand_to_path (treeview, path);
gtk_tree_view_expand_row (treeview, path, FALSE);
gtk_tree_view_scroll_to_cell (treeview, path, NULL, TRUE, 0.2, 0.0);
gtk_tree_view_set_cursor (treeview, path, NULL, FALSE);
newpath = gtk_tree_path_to_string(path);
if (asn1_debug)
g_message("my_signal_handler: treeview=%p, moveing from %s to %s",
treeview, oldpath, newpath);
g_free(text);
g_free(oldpath);
g_free(newpath);
/* if (df.path) */
/* gtk_tree_path_free(df.path); */
}
static void
menuitem_cb (gpointer callback_data,
guint callback_action,
GtkWidget *widget)
{
GtkWidget *dialog;
GtkTreeModel *model;
GtkTreeView *treeview = gtk_item_factory_popup_data_from_widget(widget);
GtkTreeSelection *selection;
GtkTreeIter iter;
gchar *text, *name;
gint def, ref;
GtkTreePath *path;
gchar *oldpath, *newpath;
GtkTreeViewColumn *focus_column;
selection = gtk_tree_view_get_selection(treeview);
model = gtk_tree_view_get_model(treeview);
gtk_tree_view_get_cursor (treeview, &path, &focus_column);
if (gtk_tree_model_get_iter (model, &iter, path)) {
gtk_tree_model_get (model, &iter, TITLE_COLUMN, &text, DEF_COLUMN, &def, REF_COLUMN, &ref,
NAME_COLUMN, &name, -1);
oldpath = gtk_tree_path_to_string(path);
newpath = empty;
switch (callback_action) {
case 0: /* Select */
gtk_tree_selection_select_path (selection, path);
break;
case 1: /* back */
path = pop_path();
if (path) {
gtk_tree_view_expand_to_path (treeview, path);
gtk_tree_view_expand_row (treeview, path, FALSE);
gtk_tree_view_scroll_to_cell (treeview, path, NULL, TRUE, 0.2, 0.0);
gtk_tree_view_set_cursor (treeview, path, NULL, FALSE);
newpath = gtk_tree_path_to_string(path);
gtk_tree_path_free(path);
} else
newpath = g_strdup("** no path **");
if (asn1_debug)
g_message("menueitem_cb: treeview=%p, moveing from %s to %s",
treeview, oldpath, newpath);
break;
case 2: /* Find */
/* get all non anonymous names to the root */
default:
dialog = gtk_message_dialog_new (GTK_WINDOW (callback_data),
GTK_DIALOG_DESTROY_WITH_PARENT,
GTK_MESSAGE_INFO,
GTK_BUTTONS_CLOSE,
"You selected the menu item: \"%s\" [%d]\n%s\npath=%s, %s\nname='%s'",
gtk_item_factory_path_from_widget (widget),
callback_action, text, oldpath, newpath, name);
/* Close dialog on user response */
g_signal_connect (dialog,
"response",
G_CALLBACK (gtk_widget_destroy),
NULL);
gtk_widget_show (dialog);
break;
}
g_free(text);
g_free(name);
if (newpath != empty)
g_free(newpath);
g_free(oldpath);
} else
g_message("menuitem_cb: no iterator...");
}
static GtkItemFactoryEntry menu_items[] = {
{ "/Select", NULL, menuitem_cb, 0, NULL, 0 },
{ "/Back", "<control>B", menuitem_cb, 1, NULL, 0 },
{ "/Find", "<control>F", menuitem_cb, 2, NULL, 0 },
{ "/Save", "<control>S", menuitem_cb, 3, NULL, 0 },
};
static gint button_press_callback( GtkWidget *widget,
GdkEventButton *event,
gpointer data )
{
GtkTreeView *treeview = GTK_TREE_VIEW(widget);
/* g_message("button_press_callback, widget=%p, button=%d, type=%d, x=%g, y=%g, x_root=%g,"
* " y_root=%g", widget, event->button, event->type, event->x, event->y, event->x_root,
* event->y_root );
*/
if (event->button == 3) {
gtk_item_factory_popup_with_data ((GtkItemFactory *)data, treeview, NULL,
event->x_root,
event->y_root,
event->button,
event->time);
return TRUE;
}
return FALSE; /* continue handling this event */
}
static void
create_message_window(void)
{
GtkCellRenderer *renderer;
GtkTreeStore *model;
GtkWidget *vbox;
GtkWidget *sw;
GtkWidget *treeview;
gchar *text;
GtkItemFactory *item_factory;
GtkAccelGroup *accel_group;
gint nmenu_items = sizeof (menu_items) / sizeof (menu_items[0]);
if ( ! window) {
/* create window, etc */
window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
gtk_window_set_title (GTK_WINDOW (window), current_pduname);
g_signal_connect (window, "destroy",
G_CALLBACK (gtk_widget_destroyed), &window);
vbox = gtk_vbox_new (FALSE, 8);
gtk_container_set_border_width (GTK_CONTAINER (vbox), 4);
gtk_container_add (GTK_CONTAINER (window), vbox);
text = g_strdup_printf("ASN.1 message structure from %s, %s", current_asn1, current_pduname);
gtk_box_pack_start (GTK_BOX (vbox),
gtk_label_new (text),
FALSE, FALSE, 0);
g_free(text);
sw = gtk_scrolled_window_new (NULL, NULL);
gtk_scrolled_window_set_shadow_type (GTK_SCROLLED_WINDOW (sw),
GTK_SHADOW_ETCHED_IN);
gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (sw),
GTK_POLICY_AUTOMATIC,
GTK_POLICY_AUTOMATIC);
gtk_box_pack_start (GTK_BOX (vbox), sw, TRUE, TRUE, 0);
model = gtk_tree_store_new(N_COLUMNS, G_TYPE_STRING, G_TYPE_INT, G_TYPE_INT,
G_TYPE_STRING, G_TYPE_STRING);
namelist = ws_fopen("namelist.txt", "w");
build_tree_view(model, PDUtree, NULL);
fclose(namelist);
namelist = 0;
/* create tree view */
treeview = gtk_tree_view_new_with_model (GTK_TREE_MODEL (model));
g_object_unref (model);
gtk_tree_view_set_rules_hint (GTK_TREE_VIEW (treeview), TRUE);
gtk_tree_selection_set_mode (gtk_tree_view_get_selection (GTK_TREE_VIEW (treeview)),
GTK_SELECTION_MULTIPLE);
renderer = gtk_cell_renderer_text_new ();
#if 0 /* testing pango attributes */
{
PangoAttribute* bg;
PangoAttrList* attr;
attr = pango_attr_list_new();
bg = pango_attr_background_new(50000,55000,50000);
bg->start_index = 0;
bg->end_index = 10000;
pango_attr_list_insert(attr, bg);
g_object_set(renderer, "attributes", attr, NULL);
}
#endif /* testing pango attributes */
gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW(treeview),
TITLE_COLUMN, "asn1 entities", renderer,
"text", TITLE_COLUMN, NULL );
/* renderer = gtk_cell_renderer_text_new ();
* gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW(treeview),
* DEF_COLUMN, "type definition", renderer,
* "text", DEF_COLUMN, NULL );
*
* renderer = gtk_cell_renderer_text_new ();
* gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW(treeview),
* REF_COLUMN, "reference", renderer,
* "text", REF_COLUMN, NULL );
*/
renderer = gtk_cell_renderer_pixbuf_new ();
gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW(treeview),
VALUE_COLUMN, "value", renderer,
"stock_id", VALUE_COLUMN, NULL );
renderer = gtk_cell_renderer_text_new ();
gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW(treeview),
NAME_COLUMN, "fieldname", renderer,
"text", NAME_COLUMN, NULL );
gtk_container_add (GTK_CONTAINER (sw), treeview);
/* gtk_tree_view_set_headers_visible (GTK_TREE_VIEW(treeview), FALSE); */
/* create menu */
accel_group = gtk_accel_group_new ();
/* This function initializes the item factory.
* Param 1: The type of menu - can be GTK_TYPE_MENU_BAR, GTK_TYPE_MENU,
* or GTK_TYPE_OPTION_MENU.
* Param 2: The path of the menu.
* Param 3: A pointer to a gtk_accel_group. The item factory sets up
* the accelerator table while generating menus.
*/
item_factory = gtk_item_factory_new (GTK_TYPE_MENU, "<menu>", accel_group);
/* This function generates the menu items. Pass the item factory,
the number of items in the array, the array itself, and any
callback data for the the menu items. */
gtk_item_factory_create_items (item_factory, nmenu_items, menu_items, NULL);
/* Attach the new accelerator group to the window. */
gtk_window_add_accel_group (GTK_WINDOW (window), accel_group);
/* expand all rows after the treeview widget has been realized */
g_signal_connect (treeview, "realize",
G_CALLBACK (gtk_tree_view_expand_all), NULL);
g_signal_connect (treeview, "row-activated",
G_CALLBACK (my_signal_handler), (gpointer)model);
g_signal_connect (treeview, "button_press_event",
G_CALLBACK (button_press_callback), item_factory);
/* g_signal_connect_swapped (treeview, "event",
* G_CALLBACK (button_press_handler),
* menu);
*/
gtk_window_set_default_size (GTK_WINDOW (window), 650, 400);
}
if (!GTK_WIDGET_VISIBLE (window))
gtk_widget_show_all (window);
else
{
gtk_widget_destroy (window);
window = NULL;
}
}
#endif /* SHOWPDU */
/************************************************************************************************
* routines to find names to go with the decoded data stream *
************************************************************************************************/
#define PDUSTATE_STACK_SIZE 1024
typedef struct _statestack statestack;
static struct _statestack {
GNode *node;
guint type;
guint offset;
const char *name;
} PDUstate[PDUSTATE_STACK_SIZE];
static gint PDUstatec = 0;
/* XXX - Shouldn't we do bounds checking here? */
#define PUSHNODE(x) { PDUstate[PDUstatec++] = (x); }
#define POPSTATE PDUstate[--PDUstatec]
static const char *
getname(GNode *node) {
if (node == NULL || node->data == NULL)
THROW(ReportedBoundsError);
return ((PDUinfo *)node->data)->name;
}
static guint
gettype(GNode *node) {
if (node == NULL || node->data == NULL)
THROW(ReportedBoundsError);
return ((PDUinfo *)node->data)->type & TBL_TYPEmask;
}
static gpointer
getinfo(GNode *node) {
if (node == NULL)
THROW(ReportedBoundsError);
return node->data;
}
#define NEXT {pos.node = g_node_next_sibling(pos.node);pos.type=0;}
#define CHILD {pos.node = g_node_first_child(pos.node);pos.type=0;}
#define MATCH ((class == info->tclass) && (tag == info->tag))
#define ISOPTIONAL (info && (info->flags & PDU_OPTIONAL))
#define ISIMPLICIT (info && (info->flags & PDU_IMPLICIT))
#define ISREFERENCE (info && (info->flags & PDU_REFERENCE))
#define ISCHOICE (info && (info->flags & PDU_CHOICE))
#define ISANONYMOUS (info && (info->flags & PDU_ANONYMOUS))
#undef CHECKP
#define CHECKP(p) {if ((p==0)||(PDUstatec<0)){g_warning("pointer==0, line %d **********", __LINE__);\
pos.node=NULL;PUSHNODE(pos);return ret;}}
static void
showstack(statestack *pos, char *txt, int n)
{
char buf[1024];
const char *name, *type, *stype;
const char *rep, *chs, *done, *ref, *pop, *chr, *rch, *sch, *con;
int i, j;
GNode *g;
statestack *p;
guint typef;
if ( ! asn1_verbose)
return;
if (n>PDUstatec)
n = PDUstatec;
if (n<0) {
g_message("==underflow");
return;
}
rep = chs = done = ref = pop = chr = rch = sch = con = empty;
g = pos->node;
if (g) {
name = ((PDUinfo *)g->data)->name;
type = TBLTYPE(((PDUinfo *)g->data)->type);
} else {
name = "node<null>";
type = "?";
}
typef = pos->type;
stype = TBLTYPE(typef);
if (typef & TBL_REPEAT) rep = "[repeat]";
if (typef & TBL_CHOICE_made) chs = "[choice]";
if (typef & TBL_SEQUENCE_done) done = "[done]";
if (typef & TBL_REFERENCE) ref = "[ref]";
if (typef & TBL_REFERENCE_pop) pop = "[ref-pop]";
if (typef & TBL_CHOICE_repeat) chr = "[chs-rep]";
if (typef & TBL_REPEAT_choice) rch = "[rep-chs]";
if (typef & TBL_SEQUENCE_choice)sch = "[seq-chs]";
if (typef & TBL_CONSTRUCTED) con = "[constr]";
i = g_sprintf(buf, "%s sp=%d,pos=%p,%s%s%s%s%s%s%s%s%s%s:%s,%d", txt, PDUstatec,
pos->node, stype, rep, chs, done, ref, pop, chr, rch, sch, con,
pos->name, pos->offset);
for(j=1, n--; n>0; j++, n--) {
p = &PDUstate[PDUstatec-j];
typef = p->type;
stype = TBLTYPE(typef);
rep = (typef & TBL_REPEAT) ? "[repeat]" : empty;
chs = (typef & TBL_CHOICE_made) ? "[choice]" : empty;
done = (typef & TBL_SEQUENCE_done) ? "[done]" : empty;
ref = (typef & TBL_REFERENCE) ? "[ref]" : empty;
pop = (typef & TBL_REFERENCE_pop) ? "[ref-pop]" : empty;
chr = (typef & TBL_CHOICE_repeat) ? "[chs-rep]" : empty;
rch = (typef & TBL_REPEAT_choice) ? "[rep-chs]" : empty;
sch = (typef & TBL_SEQUENCE_choice)? "[seq-chs]" : empty;
con = (typef & TBL_CONSTRUCTED) ? "[constr]" : empty;
i += g_sprintf(&buf[i], "| sp=%d,st=%p,%s%s%s%s%s%s%s%s%s%s:%s,%d", PDUstatec-j,
p->node, stype, rep, chs, done, ref, pop, chr, rch, sch, con,
p->name, p->offset);
}
g_message(buf);
}
#if 0
static void
showrefNode(GNode *node, int n)
{
const char *name = empty, *type = empty, *tname = empty;
int cls = 0, tag = 0;
PDUinfo *info;
GNode *ref = 0;
if (n > 10) {
g_message("%*sstop, nesting too deep", 2*n, empty);
return;
}
if (node->data) {
info = (PDUinfo *)(node->data);
type = TBLTYPE(info->type);
name = info->name;
tname = info->typename;
ref = info->reference;
cls = info->tclass;
tag = info->tag;
}
g_message("%*sreference '(%s)%s:%s' at %p: data=%p, reference=%p, %c%d",
2*n, empty, tname, type, name, node, node->data,
ref, tag_class[cls], tag);
if (ref)
showrefNode(ref, n+1);
}
#endif
#if 0
static void
showNode(GNode *node, int n, int m)
{
const char *name = empty, *type = empty;
GNode *ref = 0;
if (n > m)
return;
if (node->data) {
type = TBLTYPE(((PDUinfo *)(node->data))->type);
name = ((PDUinfo *)(node->data))->name;
ref = ((PDUinfo *)(node->data))->reference;
}
g_message("%*snode '%s:%s' at %p: data=%p, next=%p, prev=%p, parent=%p, child=%p",
2*n, empty, type, name, node, node->data, node->next, node->prev,
node->parent, node->children);
if (m > 10) {
g_message("%*sstop, nesting too deep", 2*n, empty);
return;
}
if (ref) showrefNode(ref, n+2);
if (node->children) showNode(node->children, n+1, m);
if (node->next) showNode(node->next, n, m);
}
#endif
static void
PDUreset(int count, int count2)
{
statestack pos;
if (asn1_verbose) g_message("PDUreset %d-%d", count, count2);
PDUstatec = 0; /* stackpointer */
PDUerrcount = 0; /* error counter per asn.1 message */
pos.node = NULL; /* sentinel */
pos.name = "sentinel";
pos.type = TBL_SEQUENCEOF;
pos.offset = 0;
PUSHNODE(pos);
if (PDUtree) {
pos.node = PDUtree; /* root of the tree */
pos.name = getname(pos.node);
pos.type = gettype(pos.node) | TBL_REPEAT;
pos.offset = 0;
PUSHNODE(pos);
}
}
static GNode * /* find GNode for a choice element, 0 if none */
makechoice(GNode *p, guint class, guint tag)
{
GNode *q;
PDUinfo *info;
p = g_node_first_child(p); /* the list of choices */
info = 0; /* avoid gcc warning */
while (p) {
info = ((PDUinfo *)p->data);
if (info->type == TBL_CHOICE) {
if (asn1_verbose)
g_message(" using sub choice (%s)%s", info->typename, info->name);
q = makechoice(p, class, tag);
if (q) { /* found it */
p = q;
info = ((PDUinfo *)p->data);
break;
} /* continue with this level */
} else {
if (asn1_verbose)
g_message(" have %c%d, found %c%d, %s", tag_class[class], tag,
tag_class[info->tclass], info->tag, info->name);
if ((class == info->tclass) && (tag == info->tag))
break; /* found it */
}
p = g_node_next_sibling(p);
}
if (asn1_verbose) {
if (p) g_message(" OK, '%s:(%s)%s' chosen", tbl_types[info->type], info->typename,
info->name);
else g_message(" ...no matching choice...");
}
return p;
}
/* offset is for debugging only, a reference to output on screen */
static PDUprops *
getPDUprops(PDUprops *out, guint offset, guint class, guint tag, guint cons)
{
statestack pos, pos2, save_pos;
PDUinfo *info;
const char *ret, *tmp;
int typeflags = 0, donext = 0, pushed = 0, cons_handled = 0;
static char namestr[64]; /* enough ? */
static char posstr[40];
static char noname[] = "*noname*";
static PDUprops constructed_save; /* for unexpectedly constructed enteties */
if (PDUstatec > 0) /* don't read from below the stack */
pos = POPSTATE;
/* pos refers to the last asn1 node handled */
/* a very simple, too simple??, way to handle constructed entities */
if ((PDUstatec > 0) && (pos.type & TBL_CONSTRUCTED)) {
/* unexpectedly constructed, return same info as last time */
g_sprintf(posstr, "==off=%d %c%d%c", offset, tag_class[class], tag, cons?'c':'p');
showstack(&pos, posstr, 3);
pos.offset = offset;
pos.type &= ~TBL_CONSTRUCTED; /* remove the flag */
PUSHNODE(pos); /* push extra, to match with a EOI operation */
PUSHNODE(pos); /* restore the stack */
*out = constructed_save;
if (asn1_verbose)
g_message(" return for constructed %s (%s)%s",
TBLTYPE(out->type), out->typename, out->name);
return out;
}
save_pos = pos; /* may need it again */
out->type = 0;
out->name = 0;
out->typename = "*error*";
out->fullname = 0;
out->flags = 0;
out->data = 0;
out->value_id = -1;
out->type_id = -1;
if (PDUstatec <= 0) {
if (PDUstatec > -10) {
if (asn1_verbose)
g_message(">>off=%d stack underflow, return", offset);
}
if (PDUstatec == -10) {
if (asn1_verbose)
g_message(">>off=%d stack underflow, return, no more messages", offset);
}
out->name = "*underflow*";
out->flags |= OUT_FLAG_noname;
PDUerrcount++;
return out;
}
g_sprintf(posstr, "==off=%d %c%d%c", offset, tag_class[class], tag, cons?'c':'p');
showstack(&pos, posstr, 3);
ret = noname;
if (class == ASN1_EOI) { /* end of this input sequence */
if (pos.type & TBL_REFERENCE_pop) { /* reference finished, return to caller */
if (asn1_verbose) g_message(" EOI: reference pop");
pos = POPSTATE;
} else
switch(pos.type & TBL_TYPEmask) {
case TBL_TYPEREF:
if (asn1_verbose) g_message(" EOI: pop typeref");
pos = POPSTATE; /* remove typeref */
break;
case TBL_CHOICE_done:
if (asn1_verbose) g_message(" EOI: mark choice");
pos = POPSTATE;
pos.type |= TBL_CHOICE_made; /* poropagate this up the stack */
PUSHNODE(pos);
break;
default:
break;
}
pos = POPSTATE; /* this is pushed back on the stack later */
if (pos.node == NULL) {
if (asn1_verbose) g_message(" EOI, pos.node == NULL");
out->name = "*no-name-EOI*";
out->flags |= OUT_FLAG_noname;
PDUerrcount++;
return out;
}
info = getinfo(pos.node);
ret = info->name;
tmp = TBLTYPE(info->type);
if (offset != pos.offset) {
if (asn1_verbose)
g_message(" *EOI %s:%s mismatch, EOIoffset=%d, stack=%d",
tmp, ret, offset, pos.offset);
while ((offset < pos.offset) && (PDUstatec > 0)) {
pos = POPSTATE;
if (asn1_verbose)
g_message(" EOI extra pop, EOIoffset=%d, stack=%d",
offset, pos.offset);
}
if (offset != pos.offset)
PDUerrcount++; /* only count if still unequal */
} else {
if (asn1_verbose) g_message(" EOI %s:%s OK, offset=%d", tmp, ret, offset);
}
} else {
/* EOC is only present for indefinite length sequences, etc. end of sequence is always
* indicated by the synthetic EOI call. */
if ((class == BER_CLASS_UNI) && (tag == BER_UNI_TAG_EOC)) { /* explicit EOC never has a name */
PUSHNODE(pos); /* restore stack */
ret = "explicit-EOC";
if (asn1_verbose) g_message(" return '%s', ignore", ret);
out->name = ret;
out->typename = "ASN1";
return out;
}
/* find appropriate node for this tag */
if (pos.node == NULL) {
if (asn1_verbose) g_message(" pos.node == NULL");
out->name = "*no-name*";
out->flags |= OUT_FLAG_noname;
PDUerrcount++;
return out;
}
/* showNode(pos.node, 3, 4); */
switch (pos.type & TBL_TYPEmask) {
case TBL_SEQUENCE: /* avoid finishing a choice when we have to do a sequence first */
case TBL_SET:
break;
default:
if (pos.type & TBL_CHOICE_made) {
if (asn1_verbose) g_message(" finish choice");
donext = 1;
}
break;
}
info = getinfo(pos.node);
if (pos.type & TBL_REPEAT) { /* start of a repeat */
switch(pos.type & TBL_TYPEmask) { /* type of previous node */
case TBL_CHOICE:
if (asn1_verbose) g_message(" repeating choice"); /* ignore repeat */
break;
default:
if (asn1_verbose) g_message(" seqof: repeat start");
/* decide how to continue, CHILD for next instance of sequence
* or NEXT for end of repeated sequence.
* use the tag to make a descision */
if (asn1_verbose) g_message(" seqof: first got %c%d, found %c%d",
tag_class[class], tag,
tag_class[info->tclass], info->tag);
if ( MATCH ) {
/* This is the start of repeating */
PUSHNODE(pos);
ret = getname(pos.node);
if (asn1_verbose) g_message(" return for repeat '%s'", ret);
out->type = (pos.type & TBL_TYPEmask);
out->typename = info->typename;
out->name = ret;
out->value_id = info->value_id;
out->type_id = info->type_id;
if (ISANONYMOUS) {
if (asn1_verbose) g_message(" anonymous: dontshow");
if (asn1_debug)
out->flags |= OUT_FLAG_dontshow;
else
out->name = empty;
}
return out;
} else {
/* find out where to go .... */
pos2 = pos;
CHILD; /* assume sequence is repeated */
if (pos.node) {
info = getinfo(pos.node); /* needed for MATCH to look ahead */
if (asn1_verbose)
g_message(" seqof: child: got %c%d, found %c%d",
tag_class[class], tag,
tag_class[info->tclass], info->tag);
}
if (pos2.type & TBL_CHOICE_repeat) {
pos = POPSTATE;
if (asn1_verbose)
g_message(" repeating a choice, %s",
getname(pos.node));
pos.type = TBL_CHOICE_immediate;
} else {
if ( pos.node && ! MATCH) { /* no, repeat ends, */
donext = 1; /* move on */
if (asn1_verbose)
g_message(" seqof: no repeat, force next");
}
/* following code will take the child again */
pos = pos2;
}
}
break;
}
} else if (pos.type & TBL_REFERENCE_pop) { /* reference finished, return to caller */
if (asn1_verbose) g_message(" reference pop, donext");
pos = POPSTATE;
donext = 1;
} else if (pos.type & TBL_SEQUENCE_done) { /* Children have been processed */
if (pos.type & TBL_SEQUENCE_choice) {
pos = POPSTATE; /* expect to find a repeat here */
} else {
donext = 1;
if (asn1_verbose) g_message(" sequence done, donext");
}
}
if (pos.type & TBL_REFERENCE) {
if (asn1_verbose) g_message(" reference change ref -> pop");
pos.type ^= (TBL_REFERENCE | TBL_REFERENCE_pop);
}
pos.offset = offset;
ret = pos.name; /* for the debug messages */
if (donext) {
if (asn1_verbose) g_message(" donext");
NEXT;
} else {
switch(pos.type & TBL_TYPEmask) { /* type of previous node */
case TBL_SETOF: /* ?? */
case TBL_SEQUENCEOF:
if ((pos.type & TBL_REPEAT) == 0) { /* start repeating */
pos.type |= TBL_REPEAT;
PUSHNODE(pos);
CHILD;
pushed++;
/* remember this is the start of a repeat cycle */
typeflags |= TBL_REPEAT;
if (asn1_verbose)
g_message(" seqof: set repeat mark [push,child]");
} else {
if (asn1_verbose)
g_message(" seqof: end of reapeat loop [next]");
NEXT;
}
break;
case TBL_SET: /* ?? */
case TBL_SEQUENCE:
pos.type |= TBL_SEQUENCE_done;
PUSHNODE(pos);
CHILD;
pushed++;
if (asn1_verbose) g_message(" seq [push,child]");
break;
case TBL_CHOICE:
/* no more choice */
pos.type = (TBL_CHOICE_done | (pos.type & ~TBL_TYPEmask));
PUSHNODE(pos);
pos.type = 0; /* clear all type flags */
if (asn1_verbose)
g_message(" choice [push], %c%d, %s",
tag_class[info->tclass], info->tag, getname(pos.node));
pos.node = makechoice(pos.node, class, tag);
if (pos.node == NULL) {
pos = POPSTATE;
out->flags |= OUT_FLAG_noname;
PDUerrcount++;
}
info = getinfo(pos.node);
ret = getname(pos.node);
if (asn1_verbose)
g_message(" '%s' %c%d will be used",
ret, tag_class[info->tclass], info->tag);
break;
case TBL_CHOICE_done:
NEXT;
break;
case TBL_TYPEREF:
pos = POPSTATE;
NEXT;
if (asn1_verbose) g_message(" typeref [pop,next]");
break;
case TBL_ENUMERATED:
case TBL_BITSTRING:
/* skip named numbers now, call to PDUenum() will retrieve a name */
NEXT;
break;
case TBL_CHOICE_immediate:
if (asn1_verbose) g_message(" immediate choice [no next]");
/* nothing */
break;
default:
NEXT;
break;
}
}
if (pos.node == NULL) {
ret = "*no-name-2*";
if (asn1_verbose) g_message(" return '%s'", ret);
out->name = ret;
out->flags |= OUT_FLAG_noname;
PDUerrcount++;
return out;
}
ret = pos.name = getname(pos.node);
pos.type = gettype(pos.node) | (pos.type & ~TBL_TYPEmask);
info = getinfo(pos.node);
/* pos now points to the prospective current node, go check it ********************/
if (asn1_verbose) g_message(" candidate %s '%s'%s%s, %c%d", TBLTYPE(pos.type), ret,
(ISOPTIONAL)?", optional":empty,
(ISIMPLICIT)?", implicit":empty,
tag_class[info->tclass], info->tag );
if (ISOPTIONAL) { /* must check the tag */
while(! MATCH) { /* check optional here again...? */
if (asn1_verbose)
g_message(" got %c%d, found %c%d", tag_class[class], tag,
tag_class[info->tclass], info->tag);
NEXT;
if (pos.node == NULL) {
ret = "------";
if (cons) {
pos = save_pos; /* reset for next time */
pos.type |= TBL_SEQUENCE_done;
PUSHNODE(pos);
pos.type &= ~TBL_SEQUENCE_done;
cons_handled = 1;
out->flags |= OUT_FLAG_dontshow;
if (asn1_verbose)
g_message(" end of optional list, constructed, expect value next time");
} else {
PDUerrcount++;
out->flags |= OUT_FLAG_noname;
if (asn1_verbose)
g_message(" *end of optional list...");
info = 0; /* this is not valid any more... */
}
break; /* end of list */
}
info = getinfo(pos.node);
if (asn1_verbose) g_message(" optional, %s", getname(pos.node));
}
if (pos.node && ! cons_handled) {
ret = pos.name = getname(pos.node);
pos.type = gettype(pos.node);
}
/* pos now refers to node with name we want, optional nodes skipped */
}
if (pos.type == TBL_CHOICE) { /* may be an immediate choice */
pos2 = pos; /* save current state */
if ( ! MATCH) {
if (! pushed) {
if (asn1_verbose)
g_message(" already pushed, skip next push");
PUSHNODE(pos);
typeflags &= ~TBL_CHOICE_made;
}
if (asn1_verbose && info)
g_message(" immediate choice [push], %c%d, %s",
tag_class[info->tclass], info->tag, getname(pos.node));
if (pos.node) {
pos.node = makechoice(pos.node, class, tag);
}
if (pos.node == NULL) {
pos = POPSTATE;
PDUerrcount++;
}
info = getinfo(pos.node);
pos.type = gettype(pos.node);
out->type = (pos.type & TBL_TYPEmask);
out->flags |= OUT_FLAG_type;
g_sprintf(namestr, "%s!%s", ret, getname(pos.node));
ret = namestr;
if (asn1_verbose)
g_message(" %s:%s will be used", TBLTYPE(pos.type), ret);
if (typeflags & TBL_REPEAT) {
pos2.type |= TBL_REPEAT | TBL_REPEAT_choice;
PUSHNODE(pos2);
pos.type |= TBL_SEQUENCE_choice;
PUSHNODE(pos);
if (asn1_verbose)
g_message(" return from immediate choice [%s] '%s'",
TBLTYPE(pos.type), ret);
out->data = pos.node; /* for access to named numbers... */
out->type = (pos.type & TBL_TYPEmask);
out->name = ret;
if (info) {
out->typename = info->typename;
out->fullname = info->fullname;
out->value_id = info->value_id;
out->type_id = info->type_id;
}
return out;
} else {
typeflags |= TBL_CHOICE_made;
}
} else {
if (asn1_verbose) g_message(" matching choice '%s'", ret);
}
if ( ! cons ) { /* ISIMPLICIT was not OK for all */
pos = pos2; /* reset for continuation */
}
}
if (asn1_verbose) {
if (info)
g_message(" using: %s '%s'%s%s, %c%d", TBLTYPE(pos.type), ret,
(ISOPTIONAL)?", optional":empty,
(ISIMPLICIT)?", implicit":empty,
tag_class[info->tclass], info->tag );
else
g_message(" using: unknown '%s'", ret);
}
/* must follow references now */
if (pos.type == TBL_TYPEREF && info) {
out->typename = info->typename;
out->type_id = info->typenum;
out->flags |= OUT_FLAG_typename;
pos2 = pos;
PUSHNODE(pos); /* remember where we were */
if (asn1_verbose) g_message(" typeref [push]");
typeflags |= TBL_REFERENCE;
if (info->reference == 0) { /* resolved ref to universal type.... */
/* showNode(pos.node, 3, 4); */
pos.type = gettype(pos.node); /* the resulting type */
info = getinfo(pos.node);
tmp = "inknown tag";
if ((info->tclass == BER_CLASS_UNI) && (info->tag < 31)) {
tmp = asn1_tag[info->tag];
pos.type = asn1_uni_type[info->tag]; /* get univsrsal type */
}
if (asn1_verbose && info)
g_message(" indirect typeref to %s:%s, %s [%c%d]",
TBLTYPE(pos.type), info->typename, tmp,
tag_class[info->tclass], info->tag );
} else {
out->fullname = info->fullname;
donext = (ISANONYMOUS); /* refereing entity has no name ? */
pos.node = info->reference;
pos.type = gettype(pos.node);
info = getinfo(pos.node);
if (asn1_verbose)
g_message(" typeref %s %s", TBLTYPE(pos.type), getname(pos.node));
/* keep name from before going through the reference, unless anonymous */
if (donext) /* refering entity has no name */
ret = getname(pos.node); /* a better name */
/* handle choice here ? !!mm!! */
out->type = (pos.type & TBL_TYPEmask);
out->flags |= OUT_FLAG_type;
/* showNode(pos.node, 3, 4); */
/* ret = getname(pos.node);*/
out->data = pos.node;
out->flags |= OUT_FLAG_data;
if (asn1_verbose)
g_message(" typeref set named number list node %p", pos.node);
if ( ! cons) {
pos = POPSTATE;
pos.type = TBL_TYPEREF_nopop;
if (asn1_verbose) g_message(" typeref pop");
} else if ((pos.type == TBL_ENUMERATED) || (pos.type == TBL_BITSTRING)){
/* do not enter the named-number list */
pos = POPSTATE;
pos.type = TBL_TYPEREF_nopop;
if (asn1_verbose) g_message(" typeref [pop]");
} else {
typeflags |= TBL_REFERENCE;
}
}
}
if (cons && ! cons_handled) { /* This entity is constructed, expected ? */
switch(pos.type) {
case TBL_BOOLEAN: /* these are not expected to be constructed */
case TBL_INTEGER:
case TBL_OCTETSTRING:
case TBL_NULL:
case TBL_OID:
case TBL_REAL:
case TBL_ENUMERATED:
case TBL_TYPEREF:
typeflags |= TBL_CONSTRUCTED;
/* this entry has no extra info, next is the same */
out->flags |= (OUT_FLAG_dontshow | OUT_FLAG_constructed);
if (asn1_verbose) g_message(" dontshow and set constructed flag");
break;
default: /* others, such as sequences, are expected to be constructed */
break;
}
}
}
if (ISANONYMOUS) {
if (asn1_verbose) g_message(" anonymous: dontshow");
if (asn1_debug) /* this entry has no extra info, next is the same */
out->flags |= OUT_FLAG_dontshow;
else
out->name = empty; /* show it, but no name */
}
if (out->name != empty)
out->name = ret;
if ( ! (out->flags & OUT_FLAG_data))
out->data = pos.node; /* for access to named numbers... */
pos.type |= typeflags;
PUSHNODE(pos);
if ( ! (out->flags & OUT_FLAG_type))
out->type = pos.type;
out->type &= TBL_TYPEmask;
if (ret == noname) {
PDUerrcount++;
out->flags |= OUT_FLAG_noname;
}
if (info && ((out->flags & OUT_FLAG_typename) == 0)) {
out->typename = info->typename;
out->type_id = info->typenum;
}
if (info && (out->value_id == -1)) {
out->value_id = info->value_id;
out->type_id = info->type_id;
}
if ((out->fullname == 0) && info)
out->fullname = info->fullname;
if (typeflags & TBL_CONSTRUCTED)
constructed_save = *out;
if (asn1_verbose)
g_message(" return [%s] '%s' vid=%d, tid=%d", TBLTYPE(out->type), out->name,
out->value_id, out->type_id);
return out;
}
static const char *
getPDUenum(PDUprops *props, guint offset, guint cls, guint tag, guint value)
{
GNode *list;
PDUinfo *info;
const char *ret, *name;
static char unnamed[] = "*unnamed*";
(void) cls; (void) tag; /* make a reference */
if (props->flags & OUT_FLAG_noname)
return empty;
ret = unnamed;
list = (GNode *)props->data;
if (list == 0) {
if (asn1_verbose) g_message("--off=%d named number list not initialized", offset);
PDUerrcount++;
return "*list-still-0*";
}
if ((PDUinfo *)list->data)
name = ((PDUinfo *)list->data)->name;
else
name = ret;
for(list = g_node_first_child(list); list; list = g_node_next_sibling(list)) {
info = (PDUinfo *)list->data;
if (value == info->tag) {
ret = info->name;
break;
}
}
if (ret == unnamed)
PDUerrcount++;
if (asn1_verbose)
g_message("--off=%d namednumber %d=%s from list %s", offset, value, ret, name);
return ret;
}
#endif /* READSYNTAX */
void
proto_register_asn1(void) {
static const enum_val_t type_recursion_opts[] = {
{ "0", "0", 0 },
{ "1", "1", 1 },
{ "2", "2", 2 },
{ "3", "3", 3 },
{ "4", "4", 4 },
{ "4", "5", 5 },
{ "6", "6", 6 },
{ "7", "7", 7 },
{ "8", "8", 8 },
{ "9", "9", 9 },
{ NULL, NULL, -1},
};
static gint *ett[1+MAX_NEST+MAXPDU];
char tmpstr[64];
module_t *asn1_module;
int i, j;
asn1_logfile = get_tempfile_path(ASN1LOGFILE);
current_asn1 = g_strdup("");
asn1_filename = g_strdup(current_asn1);
current_pduname = g_strdup("ASN1");
asn1_pduname = g_strdup(current_pduname);
proto_asn1 = proto_register_protocol("ASN.1 decoding",
"ASN1", pabbrev);
ett[0] = &ett_asn1;
for (i=0, j=1; i<MAX_NEST; i++, j++) {
ett[j] = &ett_seq[i];
ett_seq[i] = -1;
}
for(i=0; i<MAXPDU; i++, j++) {
ett[j] = &ett_pdu[i];
ett_pdu[i] = -1;
}
proto_register_subtree_array(ett, array_length(ett));
asn1_module = prefs_register_protocol(proto_asn1,
proto_reg_handoff_asn1);
#ifdef JUST_ONE_PORT
prefs_register_uint_preference(asn1_module, "tcp_port",
"ASN.1 TCP Port",
"The TCP port on which "
"ASN.1 messages will be read",
10, &global_tcp_port_asn1);
prefs_register_uint_preference(asn1_module, "udp_port",
"ASN.1 UDP Port",
"The UDP port on which "
"ASN.1 messages will be read",
10, &global_udp_port_asn1);
prefs_register_uint_preference(asn1_module, "sctp_port",
"ASN.1 SCTP Port",
"The SCTP port on which "
"ASN.1 messages will be read",
10, &global_sctp_port_asn1);
#else
g_snprintf(tmpstr, sizeof(tmpstr), "%u", TCP_PORT_ASN1);
range_convert_str(&global_tcp_ports_asn1, tmpstr, 65535);
g_snprintf(tmpstr, sizeof(tmpstr), "%u", UDP_PORT_ASN1);
range_convert_str(&global_udp_ports_asn1, tmpstr, 65535);
g_snprintf(tmpstr, sizeof(tmpstr), "%u", SCTP_PORT_ASN1);
range_convert_str(&global_sctp_ports_asn1, tmpstr, 65535);
prefs_register_range_preference(asn1_module, "tcp_ports",
"ASN.1 TCP Ports",
"The TCP ports on which "
"ASN.1 messages will be read",
&global_tcp_ports_asn1, 65535);
prefs_register_range_preference(asn1_module, "udp_ports",
"ASN.1 UDP Ports",
"The UDP ports on which "
"ASN.1 messages will be read",
&global_udp_ports_asn1, 65535);
prefs_register_range_preference(asn1_module, "sctp_ports",
"ASN.1 SCTP Ports",
"The SCTP ports on which "
"ASN.1 messages will be read",
&global_sctp_ports_asn1, 65535);
#endif /* JUST_ONE_PORT */
prefs_register_bool_preference(asn1_module, "desegment_messages",
"Desegment TCP",
"Desegment ASN.1 messages that span TCP segments",
&asn1_desegment);
old_default_asn1_filename = get_datafile_path(OLD_DEFAULT_ASN1FILE);
#ifdef _WIN32
bad_separator_old_default_asn1_filename = get_datafile_path(BAD_SEPARATOR_OLD_DEFAULT_ASN1FILE);
#endif
prefs_register_string_preference(asn1_module, "file",
"ASN.1 type table file",
"Compiled ASN.1 description of ASN.1 types",
&asn1_filename);
prefs_register_string_preference(asn1_module, "pdu_name",
"ASN.1 PDU name",
"Name of top level PDU",
&asn1_pduname);
prefs_register_uint_preference(asn1_module, "first_pdu_offset",
"Offset to first PDU in first tcp packet",
"Offset for non-reassembled packets, "
"wrong if this happens on other than the first packet!",
10, &first_pdu_offset);
prefs_register_bool_preference(asn1_module, "flat",
"Show full names",
"Show full names for all values",
&asn1_full);
prefs_register_enum_preference(asn1_module, "type_recursion",
"Eliminate references to level",
"Allow this recursion level for eliminated type references",
&type_recursion_level,
type_recursion_opts, FALSE);
prefs_register_bool_preference(asn1_module, "debug",
"ASN.1 debug mode",
"Extra output useful for debuging",
&asn1_debug);
#if 0
prefs_register_bool_preference(asn1_module, "message_win",
"Show ASN.1 tree",
"show full message description",
&asn1_message_win);
#else
prefs_register_obsolete_preference(asn1_module, "message_win");
#endif
prefs_register_bool_preference(asn1_module, "verbose_log",
"Write very verbose log",
"log to file $TMP/" ASN1LOGFILE,
&asn1_verbose);
}
/* The registration hand-off routing */
static dissector_handle_t asn1_handle;
static void
register_tcp_port(guint32 port)
{
dissector_add("tcp.port", port, asn1_handle);
}
static void
unregister_tcp_port(guint32 port)
{
dissector_delete("tcp.port", port, asn1_handle);
}
static void
register_udp_port(guint32 port)
{
dissector_add("udp.port", port, asn1_handle);
}
static void
unregister_udp_port(guint32 port)
{
dissector_delete("udp.port", port, asn1_handle);
}
static void
register_sctp_port(guint32 port)
{
dissector_add("sctp.port", port, asn1_handle);
}
static void
unregister_sctp_port(guint32 port)
{
dissector_delete("sctp.port", port, asn1_handle);
}
void
proto_reg_handoff_asn1(void) {
static int asn1_initialized = FALSE;
#ifndef JUST_ONE_PORT
char *tcp_ports_asn1_string, *udp_ports_asn1_string, *sctp_ports_asn1_string;
#endif
pcount = 0;
#ifdef JUST_ONE_PORT
if (asn1_verbose) g_message("prefs change: tcpport=%u, udpport=%u, sctpport=%u, desegnment=%d, "
"asn1file=%s, pduname=%s, first_offset=%d, debug=%d, msg_win=%d, verbose=%d",
global_tcp_port_asn1, global_udp_port_asn1, global_sctp_port_asn1, asn1_desegment,
asn1_filename, asn1_pduname, first_pdu_offset, asn1_debug, asn1_message_win, asn1_verbose);
#else
if (asn1_verbose) {
tcp_ports_asn1_string = range_convert_range(global_tcp_ports_asn1);
udp_ports_asn1_string = range_convert_range(global_udp_ports_asn1);
sctp_ports_asn1_string = range_convert_range(global_sctp_ports_asn1);
g_message("prefs change: tcpports=%s, udpports=%s, sctpports=%s, desegnment=%d, "
"asn1file=%s, pduname=%s, first_offset=%d, debug=%d, msg_win=%d, verbose=%d",
tcp_ports_asn1_string, udp_ports_asn1_string, sctp_ports_asn1_string, asn1_desegment,
asn1_filename, asn1_pduname, first_pdu_offset, asn1_debug, asn1_message_win, asn1_verbose);
}
#endif /* JUST_ONE_PORT */
if(!asn1_initialized) {
asn1_handle = create_dissector_handle(dissect_asn1,proto_asn1);
asn1_initialized = TRUE;
} else { /* clean up ports and their lists */
#ifdef JUST_ONE_PORT
unregister_tcp_port(tcp_port_asn1);
unregister_udp_port(udp_port_asn1);
unregister_sctp_port(sctp_port_asn1);
#else
if (tcp_ports_asn1 != NULL) {
range_foreach(tcp_ports_asn1, unregister_tcp_port);
g_free(tcp_ports_asn1);
}
if (udp_ports_asn1 != NULL) {
range_foreach(udp_ports_asn1, unregister_udp_port);
g_free(udp_ports_asn1);
}
if (sctp_ports_asn1 != NULL) {
range_foreach(sctp_ports_asn1, unregister_sctp_port);
g_free(sctp_ports_asn1);
}
#endif /* JUST_ONE_PORT */
}
if (strcmp(asn1_filename, current_asn1) != 0) {
/* new definitions, parse the file if we have one */
/* !!! should be postponed until we really need it !!! */
#ifdef READSYNTAX
read_asn1_type_table(asn1_filename);
#endif /* READSYNTAX */
g_free(current_asn1);
current_asn1 = g_strdup(asn1_filename);
}
if (!PDUtree || /* no tree built yet for PDU type */
strcmp(asn1_pduname, current_pduname) != 0) { /* new PDU type, build tree for it */
if (build_pdu_tree(asn1_pduname)) {
g_free(current_pduname);
current_pduname = g_strdup(asn1_pduname);
}
}
#ifdef SHOWPDU
if (asn1_message_win) { /* show what we are prepared to recognize */
if (window) {
gtk_widget_destroy (window);
window = NULL;
}
create_message_window();
}
#endif /* SHOWPDU */
/* If we now have a PDU tree, register for the port or ports we have */
if (PDUtree) {
#ifdef JUST_ONE_PORT
tcp_port_asn1 = global_tcp_port_asn1;
udp_port_asn1 = global_udp_port_asn1;
sctp_port_asn1 = global_sctp_port_asn1;
register_tcp_port(tcp_port_asn1);
register_udp_port(udp_port_asn1);
register_sctp_port(sctp_port_asn1);
#else
tcp_ports_asn1 = range_copy(global_tcp_ports_asn1);
udp_ports_asn1 = range_copy(global_udp_ports_asn1);
sctp_ports_asn1 = range_copy(global_sctp_ports_asn1);
range_foreach(tcp_ports_asn1, register_tcp_port);
range_foreach(udp_ports_asn1, register_udp_port);
range_foreach(sctp_ports_asn1, register_sctp_port);
}
#endif /* JUST_ONE_PORT */
}
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