forked from osmocom/wireshark
![Laurent Deniel](/assets/img/avatar_default.png)
the following: It is now possible to enable/disable a particular protocol decoding (i.e. the protocol dissector is void or not). When a protocol is disabled, it is displayed as Data and of course, all linked sub-protocols are disabled as well. Disabling a protocol could be interesting: - in case of buggy dissectors - in case of wrong heuristics - for performance reasons - to decode the data as another protocol (TODO) Currently (if I am not wrong), all dissectors but NFS can be disabled (and dissectors that do not register protocols :-) I do not like the way the RPC sub-dissectors are disabled (in the sub-dissectors) since this could be done in the RPC dissector itself, knowing the sub-protocol hfinfo entry (this is why, I've not modified the NFS one yet). Two functions are added in proto.c : gboolean proto_is_protocol_enabled(int n); void proto_set_decoding(int n, gboolean enabled); and two MACROs which can be used in dissectors: OLD_CHECK_DISPLAY_AS_DATA(index, pd, offset, fd, tree) CHECK_DISPLAY_AS_DATA(index, tvb, pinfo, tree) See also the XXX in proto_dlg.c and proto.c around the new functions. svn path=/trunk/; revision=2267
1853 lines
51 KiB
C
1853 lines
51 KiB
C
/* packet-clnp.c
|
|
* Routines for ISO/OSI network and transport protocol packet disassembly
|
|
*
|
|
* $Id: packet-clnp.c,v 1.13 2000/08/13 14:08:05 deniel Exp $
|
|
* Laurent Deniel <deniel@worldnet.fr>
|
|
* Ralf Schneider <Ralf.Schneider@t-online.de>
|
|
*
|
|
* Ethereal - Network traffic analyzer
|
|
* By Gerald Combs <gerald@zing.org>
|
|
* Copyright 1998 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.
|
|
*
|
|
*/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
# include "config.h"
|
|
#endif
|
|
|
|
#ifdef HAVE_SYS_TYPES_H
|
|
# include <sys/types.h>
|
|
#endif
|
|
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <ctype.h>
|
|
#include <glib.h>
|
|
#include "prefs.h"
|
|
#include "packet.h"
|
|
#include "packet-osi.h"
|
|
#include "packet-osi-options.h"
|
|
#include "packet-clnp.h"
|
|
#include "packet-isis.h"
|
|
#include "packet-esis.h"
|
|
#include "nlpid.h"
|
|
|
|
/* protocols and fields */
|
|
|
|
static int proto_clnp = -1;
|
|
static gint ett_clnp = -1;
|
|
static int proto_cotp = -1;
|
|
static gint ett_cotp = -1;
|
|
static int proto_cltp = -1;
|
|
static gint ett_cltp = -1;
|
|
|
|
static int hf_clnp_id = -1;
|
|
static int hf_clnp_length = -1;
|
|
static int hf_clnp_version = -1;
|
|
static int hf_clnp_ttl = -1;
|
|
static int hf_clnp_type = -1;
|
|
static int hf_clnp_pdu_length = -1;
|
|
static int hf_clnp_checksum = -1;
|
|
static int hf_clnp_dest_length = -1;
|
|
static int hf_clnp_dest = -1;
|
|
static int hf_clnp_src_length = -1;
|
|
static int hf_clnp_src = -1;
|
|
|
|
/*
|
|
* ISO 8473 OSI CLNP definition (see RFC994)
|
|
*
|
|
* _________________________________
|
|
* | Fixed Part |
|
|
* |_________________________________|
|
|
* | Address Part |
|
|
* |_________________________________|
|
|
* | Segmentation Part (optional) |
|
|
* |_________________________________|
|
|
* | Options Part (optional) |
|
|
* |_________________________________|
|
|
* | Data (optional) |
|
|
* |_________________________________|
|
|
*/
|
|
|
|
#define ISO8473_V1 0x01 /* CLNP version 1 */
|
|
|
|
/* Fixed part */
|
|
|
|
struct clnp_header {
|
|
u_char cnf_proto_id; /* network layer protocol identifier */
|
|
u_char cnf_hdr_len; /* length indicator (octets) */
|
|
u_char cnf_vers; /* version/protocol identifier extension */
|
|
u_char cnf_ttl; /* lifetime (500 milliseconds) */
|
|
u_char cnf_type; /* type code */
|
|
u_char cnf_seglen_msb; /* pdu segment length (octets) high byte */
|
|
u_char cnf_seglen_lsb; /* pdu segment length (octets) low byte */
|
|
u_char cnf_cksum_msb; /* checksum high byte */
|
|
u_char cnf_cksum_lsb; /* checksum low byte */
|
|
};
|
|
|
|
#define CNF_TYPE 0x1f
|
|
#define CNF_ERR_OK 0x20
|
|
#define CNF_MORE_SEGS 0x40
|
|
#define CNF_SEG_OK 0x80
|
|
|
|
#define DT_NPDU 0x1C
|
|
#define MD_NPDU 0x1D
|
|
#define ER_NPDU 0x01
|
|
#define ERQ_NPDU 0x1E
|
|
#define ERP_NPDU 0x1F
|
|
|
|
static const value_string npdu_type_vals[] = {
|
|
{ DT_NPDU, "DT" },
|
|
{ MD_NPDU, "MD" },
|
|
{ ER_NPDU, "ER" },
|
|
{ ERQ_NPDU, "ERQ" },
|
|
{ ERP_NPDU, "ERP" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
/* field position */
|
|
|
|
#define P_ADDRESS_PART 9
|
|
|
|
/* Segmentation part */
|
|
|
|
struct clnp_segment {
|
|
u_short cng_id; /* data unit identifier */
|
|
u_short cng_off; /* segment offset */
|
|
u_short cng_tot_len; /* total length */
|
|
};
|
|
|
|
/* NSAP selector */
|
|
|
|
#define NSEL_NET 0x00
|
|
#define NSEL_NP 0x20
|
|
#define NSEL_TP 0x21
|
|
|
|
/*
|
|
* ISO8073 OSI COTP definition (see RFC905)
|
|
*/
|
|
|
|
/* don't use specific TPDU types to avoid alignment problems & copy overhead */
|
|
|
|
/* TPDU definition */
|
|
|
|
#define ED_TPDU 0x1 /* COTP */
|
|
#define EA_TPDU 0x2 /* COTP */
|
|
#define UD_TPDU 0x4 /* CLTP */
|
|
#define RJ_TPDU 0x5 /* COTP */
|
|
#define AK_TPDU 0x6 /* COTP */
|
|
#define ER_TPDU 0x7 /* COTP */
|
|
#define DR_TPDU 0x8 /* COTP */
|
|
#define DC_TPDU 0xC /* COTP */
|
|
#define CC_TPDU 0xD /* COTP */
|
|
#define CR_TPDU 0xE /* COTP */
|
|
#define DT_TPDU 0xF /* COTP */
|
|
|
|
/* field position */
|
|
|
|
#define P_LI 0
|
|
#define P_TPDU 1
|
|
#define P_CDT 1
|
|
#define P_DST_REF 2
|
|
#define P_SRC_REF 4
|
|
#define P_TPDU_NR_0_1 2
|
|
#define P_TPDU_NR_234 4
|
|
#define P_VAR_PART_NDT 5
|
|
#define P_VAR_PART_EDT 8
|
|
#define P_VAR_PART_DC 6
|
|
#define P_CDT_IN_AK 8
|
|
#define P_CDT_IN_RJ 8
|
|
#define P_REJECT_ER 4
|
|
#define P_REASON_IN_DR 6
|
|
#define P_CLASS_OPTION 6
|
|
|
|
/* TPDU length indicator */
|
|
|
|
#define LI_NORMAL_DT_CLASS_01 2
|
|
#define LI_NORMAL_DT_WITH_CHECKSUM 8
|
|
#define LI_NORMAL_DT_WITHOUT_CHECKSUM 4
|
|
#define LI_EXTENDED_DT_WITH_CHECKSUM 11
|
|
#define LI_EXTENDED_DT_WITHOUT_CHECKSUM 7
|
|
#define LI_NORMAL_EA_WITH_CHECKSUM 8
|
|
#define LI_NORMAL_EA_WITHOUT_CHECKSUM 4
|
|
#define LI_EXTENDED_EA_WITH_CHECKSUM 11
|
|
#define LI_EXTENDED_EA_WITHOUT_CHECKSUM 7
|
|
#define LI_NORMAL_RJ 4
|
|
#define LI_EXTENDED_RJ 9
|
|
#define LI_MIN_DR 6
|
|
#define LI_MAX_DC 9
|
|
#define LI_MAX_AK 27
|
|
#define LI_MAX_EA 11
|
|
#define LI_MAX_ER 8
|
|
/* XXX - can we always decide this based on whether the length
|
|
indicator is odd or not? What if the variable part has an odd
|
|
number of octets? */
|
|
#define is_LI_NORMAL_AK(p) ( ( p & 0x01 ) == 0 )
|
|
|
|
/* variant part */
|
|
|
|
#define VP_ACK_TIME 0x85
|
|
#define VP_RES_ERROR 0x86
|
|
#define VP_PRIORITY 0x87
|
|
#define VP_TRANSIT_DEL 0x88
|
|
#define VP_THROUGHPUT 0x89
|
|
#define VP_SEQ_NR 0x8A /* in AK */
|
|
#define VP_REASSIGNMENT 0x8B
|
|
#define VP_FLOW_CNTL 0x8C /* in AK */
|
|
#define VP_TPDU_SIZE 0xC0
|
|
#define VP_SRC_TSAP 0xC1 /* in CR/CC */
|
|
#define VP_DST_TSAP 0xC2
|
|
#define VP_CHECKSUM 0xC3
|
|
#define VP_VERSION_NR 0xC4
|
|
#define VP_PROTECTION 0xC5
|
|
#define VP_OPT_SEL 0xC6
|
|
#define VP_PROTO_CLASS 0xC7
|
|
#define VP_PREF_MAX_TPDU_SIZE 0xF0
|
|
#define VP_INACTIVITY_TIMER 0xF2
|
|
|
|
static const value_string tp_vpart_type_vals[] = {
|
|
{ VP_ACK_TIME, "ack time" },
|
|
{ VP_RES_ERROR, "res error" },
|
|
{ VP_PRIORITY, "priority" },
|
|
{ VP_TRANSIT_DEL, "transit delay" },
|
|
{ VP_THROUGHPUT, "throughput" },
|
|
{ VP_SEQ_NR, "seq number" },
|
|
{ VP_REASSIGNMENT, "reassignment" },
|
|
{ VP_FLOW_CNTL, "flow control" },
|
|
{ VP_TPDU_SIZE, "tpdu-size" },
|
|
{ VP_SRC_TSAP, "src-tsap" },
|
|
{ VP_DST_TSAP, "dst-tsap" },
|
|
{ VP_CHECKSUM, "checksum" },
|
|
{ VP_VERSION_NR, "version" },
|
|
{ VP_PROTECTION, "protection" },
|
|
{ VP_OPT_SEL, "options" },
|
|
{ VP_PROTO_CLASS, "proto class" },
|
|
{ VP_PREF_MAX_TPDU_SIZE, "preferred max TPDU size" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
/* misc */
|
|
|
|
#define EXTRACT_SHORT(p) pntohs(p)
|
|
#define EXTRACT_LONG(p) pntohl(p)
|
|
|
|
/* global variables */
|
|
|
|
static u_char li, tpdu, cdt; /* common fields */
|
|
static u_short dst_ref;
|
|
|
|
/* List of dissectors to call for COTP packets put atop the Inactive
|
|
Subset of CLNP. */
|
|
static heur_dissector_list_t cotp_is_heur_subdissector_list;
|
|
|
|
/* options */
|
|
static guint tp_nsap_selector = NSEL_TP;
|
|
static gboolean always_decode_transport = FALSE;
|
|
|
|
/* function definitions */
|
|
|
|
#define MAX_TSAP_LEN 32
|
|
static gchar *print_tsap(const u_char *tsap, int length)
|
|
{
|
|
|
|
static gchar str[3][MAX_TSAP_LEN * 2 + 1];
|
|
static gchar *cur;
|
|
gchar tmp[3];
|
|
gboolean allprintable;
|
|
int i;
|
|
|
|
if (cur == &str[0][0]) {
|
|
cur = &str[1][0];
|
|
} else if (cur == &str[1][0]) {
|
|
cur = &str[2][0];
|
|
} else {
|
|
cur = &str[0][0];
|
|
}
|
|
|
|
|
|
cur[0] = '\0';
|
|
if (length <= 0 || length > MAX_TSAP_LEN)
|
|
sprintf(cur, "<unsupported TSAP length>");
|
|
else {
|
|
allprintable=TRUE;
|
|
for (i=0;i<length;i++) {
|
|
/* If any byte is not printable ASCII, display the TSAP as a
|
|
series of hex byte values rather than as a string; this
|
|
means that, for example, accented letters will cause it
|
|
to be displayed as hex, but it also means that byte values
|
|
such as 0xff and 0xfe, which *are* printable ISO 8859/x
|
|
characters, won't be treated as printable - 0xfffffffe
|
|
is probably binary, not text. */
|
|
if (!(isascii(tsap[i]) && isprint(tsap[i]))) {
|
|
allprintable=FALSE;
|
|
break;
|
|
}
|
|
}
|
|
if (!allprintable){
|
|
strcat(cur,"0x");
|
|
}
|
|
while (length != 0) {
|
|
if (allprintable)
|
|
sprintf(tmp, "%c", *tsap ++);
|
|
else
|
|
sprintf(tmp, "%02x", *tsap ++);
|
|
strcat(cur, tmp);
|
|
length --;
|
|
}
|
|
}
|
|
return cur;
|
|
|
|
} /* print_tsap */
|
|
|
|
static gboolean osi_decode_tp_var_part(const u_char *pd, int offset,
|
|
int vp_length, int class_option,
|
|
proto_tree *tree)
|
|
{
|
|
guint8 code, length;
|
|
guint8 c1;
|
|
guint16 s, s1,s2,s3,s4;
|
|
guint32 t1, t2, t3, t4;
|
|
guint32 pref_max_tpdu_size;
|
|
|
|
while (vp_length != 0) {
|
|
if (!BYTES_ARE_IN_FRAME(offset, 1))
|
|
return FALSE;
|
|
code = pd[offset];
|
|
proto_tree_add_text(tree, NullTVB, offset, 1,
|
|
"Parameter code: 0x%02x (%s)",
|
|
code,
|
|
val_to_str(code, tp_vpart_type_vals, "Unknown"));
|
|
offset += 1;
|
|
vp_length -= 1;
|
|
|
|
if (vp_length == 0)
|
|
break;
|
|
if (!BYTES_ARE_IN_FRAME(offset, 1))
|
|
return FALSE;
|
|
length = pd[offset];
|
|
proto_tree_add_text(tree, NullTVB, offset, 1,
|
|
"Parameter length: %u", length);
|
|
offset += 1;
|
|
vp_length -= 1;
|
|
|
|
switch (code) {
|
|
|
|
case VP_ACK_TIME:
|
|
s = EXTRACT_SHORT(&pd[offset]);
|
|
proto_tree_add_text(tree, NullTVB, offset, length,
|
|
"Ack time (ms): %u", s);
|
|
offset += length;
|
|
vp_length -= length;
|
|
break;
|
|
|
|
case VP_RES_ERROR:
|
|
proto_tree_add_text(tree, NullTVB, offset, 1,
|
|
"Residual error rate, target value: 10^%u", pd[offset]);
|
|
offset += 1;
|
|
length -= 1;
|
|
vp_length -= 1;
|
|
|
|
proto_tree_add_text(tree, NullTVB, offset, 1,
|
|
"Residual error rate, minimum acceptable: 10^%u", pd[offset]);
|
|
offset += 1;
|
|
length -= 1;
|
|
vp_length -= 1;
|
|
|
|
|
|
proto_tree_add_text(tree, NullTVB, offset, 1,
|
|
"Residual error rate, TSDU size of interest: %u", 1<<pd[offset]);
|
|
offset += 1;
|
|
length -= 1;
|
|
vp_length -= 1;
|
|
|
|
break;
|
|
|
|
case VP_PRIORITY:
|
|
s = EXTRACT_SHORT(&pd[offset]);
|
|
proto_tree_add_text(tree, NullTVB, offset, length,
|
|
"Priority: %u", s);
|
|
offset += length;
|
|
vp_length -= length;
|
|
break;
|
|
|
|
case VP_TRANSIT_DEL:
|
|
s1 = EXTRACT_SHORT(&pd[offset]);
|
|
proto_tree_add_text(tree, NullTVB, offset, 2,
|
|
"Transit delay, target value, calling-called: %u ms", s1);
|
|
offset += 2;
|
|
length -= 2;
|
|
vp_length -= 2;
|
|
|
|
s2 = EXTRACT_SHORT(&pd[offset]);
|
|
proto_tree_add_text(tree, NullTVB, offset, 2,
|
|
"Transit delay, maximum acceptable, calling-called: %u ms", s2);
|
|
offset += 2;
|
|
length -= 2;
|
|
vp_length -= 2;
|
|
|
|
s3 = EXTRACT_SHORT(&pd[offset]);
|
|
proto_tree_add_text(tree, NullTVB, offset, 2,
|
|
"Transit delay, target value, called-calling: %u ms", s3);
|
|
offset += 2;
|
|
length -= 2;
|
|
vp_length -= 2;
|
|
|
|
s4 = EXTRACT_SHORT(&pd[offset]);
|
|
proto_tree_add_text(tree, NullTVB, offset, 2,
|
|
"Transit delay, maximum acceptable, called-calling: %u ms", s4);
|
|
offset += 2;
|
|
length -= 2;
|
|
vp_length -= 2;
|
|
break;
|
|
|
|
case VP_THROUGHPUT:
|
|
t1 = pd[offset+0] << 16 | pd[offset+1] << 8 | pd[offset+2];
|
|
proto_tree_add_text(tree, NullTVB, offset, 3,
|
|
"Maximum throughput, target value, calling-called: %u o/s", t1);
|
|
offset += 3;
|
|
length -= 3;
|
|
vp_length -= 3;
|
|
|
|
t2 = pd[offset+0] << 16 | pd[offset+1] << 8 | pd[offset+2];
|
|
proto_tree_add_text(tree, NullTVB, offset, 3,
|
|
"Maximum throughput, minimum acceptable, calling-called: %u o/s", t2);
|
|
offset += 3;
|
|
length -= 3;
|
|
vp_length -= 3;
|
|
|
|
t3 = pd[offset+0] << 16 | pd[offset+1] << 8 | pd[offset+2];
|
|
proto_tree_add_text(tree, NullTVB, offset, 3,
|
|
"Maximum throughput, target value, called-calling: %u o/s", t3);
|
|
offset += 3;
|
|
length -= 3;
|
|
vp_length -= 3;
|
|
|
|
t4 = pd[offset+0] << 16 | pd[offset+1] << 8 | pd[offset+2];
|
|
proto_tree_add_text(tree, NullTVB, offset, 3,
|
|
"Maximum throughput, minimum acceptable, called-calling: %u o/s", t4);
|
|
offset += 3;
|
|
length -= 3;
|
|
vp_length -= 3;
|
|
|
|
if (length != 0) { /* XXX - should be 0 or 12 */
|
|
t1 = pd[offset+0] << 16 | pd[offset+1] << 8 | pd[offset+2];
|
|
proto_tree_add_text(tree, NullTVB, offset, 3,
|
|
"Average throughput, target value, calling-called: %u o/s", t1);
|
|
offset += 3;
|
|
length -= 3;
|
|
vp_length -= 3;
|
|
|
|
t2 = pd[offset+0] << 16 | pd[offset+1] << 8 | pd[offset+2];
|
|
proto_tree_add_text(tree, NullTVB, offset, 3,
|
|
"Average throughput, minimum acceptable, calling-called: %u o/s", t2);
|
|
offset += 3;
|
|
length -= 3;
|
|
vp_length -= 3;
|
|
|
|
t3 = pd[offset+0] << 16 | pd[offset+1] << 8 | pd[offset+2];
|
|
proto_tree_add_text(tree, NullTVB, offset, 3,
|
|
"Average throughput, target value, called-calling: %u o/s", t3);
|
|
offset += 3;
|
|
length -= 3;
|
|
vp_length -= 3;
|
|
|
|
t4 = pd[offset+0] << 16 | pd[offset+1] << 8 | pd[offset+2];
|
|
proto_tree_add_text(tree, NullTVB, offset, 3,
|
|
"Average throughput, minimum acceptable, called-calling: %u o/s", t4);
|
|
offset += 3;
|
|
length -= 3;
|
|
vp_length -= 3;
|
|
}
|
|
break;
|
|
|
|
case VP_SEQ_NR:
|
|
proto_tree_add_text(tree, NullTVB, offset, 2,
|
|
"Sequence number: 0x%04x", EXTRACT_SHORT(&pd[offset]));
|
|
offset += length;
|
|
vp_length -= length;
|
|
break;
|
|
|
|
case VP_REASSIGNMENT:
|
|
proto_tree_add_text(tree, NullTVB, offset, 2,
|
|
"Reassignment time: %u secs", EXTRACT_SHORT(&pd[offset]));
|
|
offset += length;
|
|
vp_length -= length;
|
|
break;
|
|
|
|
case VP_FLOW_CNTL:
|
|
proto_tree_add_text(tree, NullTVB, offset, 4,
|
|
"Lower window edge: 0x%08x", EXTRACT_LONG(&pd[offset]));
|
|
offset += 4;
|
|
length -= 4;
|
|
vp_length -= 4;
|
|
|
|
proto_tree_add_text(tree, NullTVB, offset, 2,
|
|
"Sequence number: 0x%04x", EXTRACT_SHORT(&pd[offset]));
|
|
offset += 2;
|
|
length -= 2;
|
|
vp_length -= 2;
|
|
|
|
proto_tree_add_text(tree, NullTVB, offset, 2,
|
|
"Credit: 0x%04x", EXTRACT_SHORT(&pd[offset]));
|
|
offset += 2;
|
|
length -= 2;
|
|
vp_length -= 2;
|
|
|
|
break;
|
|
|
|
case VP_TPDU_SIZE:
|
|
c1 = pd[offset] & 0x0F;
|
|
proto_tree_add_text(tree, NullTVB, offset, length,
|
|
"TPDU size: %u", 2 << c1);
|
|
offset += length;
|
|
vp_length -= length;
|
|
break;
|
|
|
|
case VP_SRC_TSAP:
|
|
proto_tree_add_text(tree, NullTVB, offset, length,
|
|
"Calling TSAP: %s", print_tsap(&pd[offset], length));
|
|
offset += length;
|
|
vp_length -= length;
|
|
break;
|
|
|
|
case VP_DST_TSAP:
|
|
proto_tree_add_text(tree, NullTVB, offset, length,
|
|
"Called TSAP: %s", print_tsap(&pd[offset], length));
|
|
offset += length;
|
|
vp_length -= length;
|
|
break;
|
|
|
|
case VP_CHECKSUM:
|
|
proto_tree_add_text(tree, NullTVB, offset, length,
|
|
"Checksum: 0x%04x", EXTRACT_SHORT(&pd[offset]));
|
|
offset += length;
|
|
vp_length -= length;
|
|
break;
|
|
|
|
case VP_VERSION_NR:
|
|
c1 = pd[offset];
|
|
proto_tree_add_text(tree, NullTVB, offset, length,
|
|
"Version: %u", c1);
|
|
offset += length;
|
|
vp_length -= length;
|
|
break;
|
|
|
|
case VP_OPT_SEL:
|
|
c1 = pd[offset] & 0x0F;
|
|
switch (class_option) {
|
|
|
|
case 1:
|
|
if (c1 & 0x8)
|
|
proto_tree_add_text(tree, NullTVB, offset, 1,
|
|
"Use of network expedited data");
|
|
else
|
|
proto_tree_add_text(tree, NullTVB, offset, 1,
|
|
"Non use of network expedited data");
|
|
if (c1 & 0x4)
|
|
proto_tree_add_text(tree, NullTVB, offset, 1,
|
|
"Use of Receipt confirmation");
|
|
else
|
|
proto_tree_add_text(tree, NullTVB, offset, 1,
|
|
"Use of explicit AK variant");
|
|
break;
|
|
|
|
case 4:
|
|
if (c1 & 0x2)
|
|
proto_tree_add_text(tree, NullTVB, offset, 1,
|
|
"Non-use 16 bit checksum in class 4");
|
|
else
|
|
proto_tree_add_text(tree, NullTVB, offset, 1,
|
|
"Use 16 bit checksum ");
|
|
break;
|
|
}
|
|
if (c1 & 0x1)
|
|
proto_tree_add_text(tree, NullTVB, offset, 1,
|
|
"Use of transport expedited data transfer\n");
|
|
else
|
|
proto_tree_add_text(tree, NullTVB, offset, 1,
|
|
"Non-use of transport expedited data transfer");
|
|
offset += length;
|
|
vp_length -= length;
|
|
break;
|
|
|
|
case VP_PREF_MAX_TPDU_SIZE:
|
|
switch (length) {
|
|
|
|
case 1:
|
|
pref_max_tpdu_size = pd[offset];
|
|
break;
|
|
|
|
case 2:
|
|
pref_max_tpdu_size = EXTRACT_SHORT(&pd[offset]);
|
|
break;
|
|
|
|
case 3:
|
|
pref_max_tpdu_size = pd[offset+0] << 16 | pd[offset+1] << 8 | pd[offset+2];
|
|
break;
|
|
|
|
case 4:
|
|
pref_max_tpdu_size = EXTRACT_LONG(&pd[offset]);
|
|
break;
|
|
|
|
default:
|
|
proto_tree_add_text(tree, NullTVB, offset, length,
|
|
"Preferred maximum TPDU size: bogus length %u (not 1, 2, 3, or 4)",
|
|
length);
|
|
return FALSE;
|
|
}
|
|
proto_tree_add_text(tree, NullTVB, offset, length,
|
|
"Preferred maximum TPDU size: %u", pref_max_tpdu_size*128);
|
|
offset += length;
|
|
vp_length -= length;
|
|
break;
|
|
|
|
case VP_INACTIVITY_TIMER:
|
|
proto_tree_add_text(tree, NullTVB, offset, length,
|
|
"Inactivity timer: %u ms", EXTRACT_LONG(&pd[offset]));
|
|
offset += length;
|
|
vp_length -= length;
|
|
break;
|
|
|
|
case VP_PROTECTION: /* user-defined */
|
|
case VP_PROTO_CLASS: /* todo */
|
|
default: /* unknown, no decoding */
|
|
proto_tree_add_text(tree, NullTVB, offset, length,
|
|
"Parameter value: <not shown>");
|
|
offset += length;
|
|
vp_length -= length;
|
|
break;
|
|
}
|
|
} /* while */
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static int osi_decode_DR(const u_char *pd, int offset,
|
|
frame_data *fd, proto_tree *tree)
|
|
{
|
|
proto_tree *cotp_tree;
|
|
proto_item *ti;
|
|
u_short src_ref;
|
|
u_char reason;
|
|
char *str;
|
|
|
|
if (li < LI_MIN_DR)
|
|
return -1;
|
|
|
|
src_ref = EXTRACT_SHORT(&pd[offset + P_SRC_REF]);
|
|
reason = pd[offset + P_REASON_IN_DR];
|
|
|
|
switch(reason) {
|
|
case (128+0): str = "Normal Disconnect"; break;
|
|
case (128+1): str = "Remote transport entity congestion"; break;
|
|
case (128+2): str = "Connection negotiation failed"; break;
|
|
case (128+3): str = "Duplicate source reference"; break;
|
|
case (128+4): str = "Mismatched references"; break;
|
|
case (128+5): str = "Protocol error"; break;
|
|
case (128+7): str = "Reference overflow"; break;
|
|
case (128+8): str = "Connection requestion refused"; break;
|
|
case (128+10):str = "Header or parameter length invalid"; break;
|
|
case (0): str = "Reason not specified"; break;
|
|
case (1): str = "Congestion at TSAP"; break;
|
|
case (2): str = "Session entity not attached to TSAP"; break;
|
|
case (3): str = "Address unknown"; break;
|
|
default: return -1;
|
|
/*NOTREACHED*/
|
|
break;
|
|
}
|
|
|
|
if (check_col(fd, COL_INFO))
|
|
col_append_fstr(fd, COL_INFO, "DR TPDU src-ref: 0x%04x dst-ref: 0x%04x",
|
|
src_ref, dst_ref);
|
|
|
|
if (tree) {
|
|
ti = proto_tree_add_item(tree, proto_cotp, NullTVB, offset, li + 1, FALSE);
|
|
cotp_tree = proto_item_add_subtree(ti, ett_cotp);
|
|
proto_tree_add_text(cotp_tree, NullTVB, offset, 1,
|
|
"Length indicator: %u", li);
|
|
proto_tree_add_text(cotp_tree, NullTVB, offset + 1, 1,
|
|
"TPDU code: 0x%x (DR)", tpdu);
|
|
proto_tree_add_text(cotp_tree, NullTVB, offset + 2, 2,
|
|
"Destination reference: 0x%04x", dst_ref);
|
|
proto_tree_add_text(cotp_tree, NullTVB, offset + 4, 2,
|
|
"Source reference: 0x%04x", src_ref);
|
|
proto_tree_add_text(cotp_tree, NullTVB, offset + 6, 1,
|
|
"Cause: %s", str);
|
|
}
|
|
|
|
offset += li + 1;
|
|
old_dissect_data(pd, offset, fd, tree);
|
|
|
|
return pi.captured_len; /* we dissected all of the containing PDU */
|
|
|
|
} /* osi_decode_DR */
|
|
|
|
/* Returns TRUE if we called a sub-dissector, FALSE if not. */
|
|
static gboolean osi_decode_DT(const u_char *pd, int offset,
|
|
frame_data *fd, proto_tree *tree,
|
|
gboolean uses_inactive_subset)
|
|
{
|
|
proto_tree *cotp_tree = NULL;
|
|
proto_item *ti;
|
|
gboolean is_extended;
|
|
gboolean is_class_234;
|
|
u_int tpdu_nr ;
|
|
u_int fragment = 0;
|
|
|
|
/* VP_CHECKSUM is the only parameter allowed in the variable part.
|
|
(This means we may misdissect this if the packet is bad and
|
|
contains other parameters.) */
|
|
switch (li) {
|
|
|
|
case LI_NORMAL_DT_WITH_CHECKSUM :
|
|
if (pd[offset + P_VAR_PART_NDT] != VP_CHECKSUM)
|
|
return -1;
|
|
/* FALLTHROUGH */
|
|
|
|
case LI_NORMAL_DT_WITHOUT_CHECKSUM :
|
|
tpdu_nr = pd[offset + P_TPDU_NR_234];
|
|
if ( tpdu_nr & 0x80 )
|
|
tpdu_nr = tpdu_nr & 0x7F;
|
|
else
|
|
fragment = 1;
|
|
is_extended = FALSE;
|
|
is_class_234 = TRUE;
|
|
break;
|
|
|
|
case LI_EXTENDED_DT_WITH_CHECKSUM :
|
|
if (pd[offset + P_VAR_PART_EDT] != VP_CHECKSUM)
|
|
return -1;
|
|
/* FALLTHROUGH */
|
|
|
|
case LI_EXTENDED_DT_WITHOUT_CHECKSUM :
|
|
tpdu_nr = EXTRACT_LONG(&pd[offset + P_TPDU_NR_234]);
|
|
if ( tpdu_nr & 0x80000000 )
|
|
tpdu_nr = tpdu_nr & 0x7FFFFFFF;
|
|
else
|
|
fragment = 1;
|
|
is_extended = TRUE;
|
|
is_class_234 = TRUE;
|
|
break;
|
|
|
|
case LI_NORMAL_DT_CLASS_01 :
|
|
tpdu_nr = pd[offset + P_TPDU_NR_0_1];
|
|
if ( tpdu_nr & 0x80 )
|
|
tpdu_nr = tpdu_nr & 0x7F;
|
|
else
|
|
fragment = 1;
|
|
is_extended = FALSE;
|
|
is_class_234 = FALSE;
|
|
break;
|
|
|
|
default : /* bad TPDU */
|
|
return -1;
|
|
/*NOTREACHED*/
|
|
break;
|
|
}
|
|
|
|
if (check_col(fd, COL_INFO))
|
|
col_append_fstr(fd, COL_INFO, "DT TPDU (%u) dst-ref: 0x%04x %s",
|
|
tpdu_nr,
|
|
dst_ref,
|
|
(fragment)? "(fragment)" : "");
|
|
|
|
if (tree) {
|
|
ti = proto_tree_add_item(tree, proto_cotp, NullTVB, offset, li + 1, FALSE);
|
|
cotp_tree = proto_item_add_subtree(ti, ett_cotp);
|
|
proto_tree_add_text(cotp_tree, NullTVB, offset, 1,
|
|
"Length indicator: %u", li);
|
|
}
|
|
offset += 1;
|
|
|
|
if (tree) {
|
|
proto_tree_add_text(cotp_tree, NullTVB, offset, 1,
|
|
"TPDU code: 0x%x (DT)", tpdu);
|
|
|
|
}
|
|
offset += 1;
|
|
li -= 1;
|
|
|
|
if (is_class_234) {
|
|
if (tree) {
|
|
proto_tree_add_text(cotp_tree, NullTVB, offset, 2,
|
|
"Destination reference: 0x%04x", dst_ref);
|
|
}
|
|
offset += 2;
|
|
li -= 2;
|
|
}
|
|
|
|
if (is_extended) {
|
|
if (tree) {
|
|
proto_tree_add_text(cotp_tree, NullTVB, offset, 4,
|
|
"TPDU number: 0x%08x (%s)",
|
|
tpdu_nr,
|
|
(fragment)? "fragment":"complete");
|
|
}
|
|
offset += 4;
|
|
li -= 4;
|
|
} else {
|
|
if (tree) {
|
|
proto_tree_add_text(cotp_tree, NullTVB, offset, 1,
|
|
"TPDU number: 0x%02x (%s)",
|
|
tpdu_nr,
|
|
(fragment)? "fragment":"complete");
|
|
}
|
|
offset += 1;
|
|
li -= 1;
|
|
}
|
|
|
|
if (tree)
|
|
osi_decode_tp_var_part(pd, offset, li, 4, cotp_tree);
|
|
offset += li;
|
|
|
|
if (uses_inactive_subset){
|
|
if (old_dissector_try_heuristic(cotp_is_heur_subdissector_list, pd, offset,
|
|
fd, tree)) {
|
|
return TRUE;
|
|
}
|
|
/* Fill in other Dissectors using inactive subset here */
|
|
old_dissect_data(pd, offset, fd, tree);
|
|
return FALSE;
|
|
}
|
|
else {
|
|
old_dissect_data(pd, offset, fd, tree);
|
|
return FALSE;
|
|
}
|
|
} /* osi_decode_DT */
|
|
|
|
static int osi_decode_ED(const u_char *pd, int offset,
|
|
frame_data *fd, proto_tree *tree)
|
|
{
|
|
proto_tree *cotp_tree = NULL;
|
|
proto_item *ti;
|
|
gboolean is_extended;
|
|
u_int tpdu_nr ;
|
|
|
|
/* ED TPDUs are never fragmented */
|
|
|
|
/* VP_CHECKSUM is the only parameter allowed in the variable part.
|
|
(This means we may misdissect this if the packet is bad and
|
|
contains other parameters.) */
|
|
switch (li) {
|
|
|
|
case LI_NORMAL_DT_WITH_CHECKSUM :
|
|
if (pd[offset + P_VAR_PART_NDT] != VP_CHECKSUM)
|
|
return -1;
|
|
/* FALLTHROUGH */
|
|
|
|
case LI_NORMAL_DT_WITHOUT_CHECKSUM :
|
|
tpdu_nr = pd[offset + P_TPDU_NR_234];
|
|
if ( tpdu_nr & 0x80 )
|
|
tpdu_nr = tpdu_nr & 0x7F;
|
|
else
|
|
return -1;
|
|
is_extended = FALSE;
|
|
break;
|
|
|
|
case LI_EXTENDED_DT_WITH_CHECKSUM :
|
|
if (pd[offset + P_VAR_PART_EDT] != VP_CHECKSUM)
|
|
return -1;
|
|
/* FALLTHROUGH */
|
|
|
|
case LI_EXTENDED_DT_WITHOUT_CHECKSUM :
|
|
tpdu_nr = EXTRACT_LONG(&pd[offset + P_TPDU_NR_234]);
|
|
if ( tpdu_nr & 0x80000000 )
|
|
tpdu_nr = tpdu_nr & 0x7FFFFFFF;
|
|
else
|
|
return -1;
|
|
is_extended = TRUE;
|
|
break;
|
|
|
|
default : /* bad TPDU */
|
|
return -1;
|
|
/*NOTREACHED*/
|
|
break;
|
|
} /* li */
|
|
|
|
if (check_col(fd, COL_INFO))
|
|
col_append_fstr(fd, COL_INFO, "ED TPDU (%u) dst-ref: 0x%04x",
|
|
tpdu_nr, dst_ref);
|
|
|
|
if (tree) {
|
|
ti = proto_tree_add_item(tree, proto_cotp, NullTVB, offset, li + 1, FALSE);
|
|
cotp_tree = proto_item_add_subtree(ti, ett_cotp);
|
|
proto_tree_add_text(cotp_tree, NullTVB, offset, 1,
|
|
"Length indicator: %u", li);
|
|
}
|
|
offset += 1;
|
|
|
|
if (tree) {
|
|
proto_tree_add_text(cotp_tree, NullTVB, offset, 1,
|
|
"TPDU code: 0x%x (ED)", tpdu);
|
|
}
|
|
offset += 1;
|
|
li -= 1;
|
|
|
|
if (tree) {
|
|
proto_tree_add_text(cotp_tree, NullTVB, offset, 2,
|
|
"Destination reference: 0x%04x", dst_ref);
|
|
}
|
|
offset += 2;
|
|
li -= 2;
|
|
|
|
if (is_extended) {
|
|
if (tree) {
|
|
proto_tree_add_text(cotp_tree, NullTVB, offset, 4,
|
|
"TPDU number: 0x%02x", tpdu_nr);
|
|
}
|
|
offset += 4;
|
|
li -= 4;
|
|
} else {
|
|
if (tree) {
|
|
proto_tree_add_text(cotp_tree, NullTVB, offset, 1,
|
|
"TPDU number: 0x%02x", tpdu_nr);
|
|
}
|
|
offset += 1;
|
|
li -= 1;
|
|
}
|
|
|
|
if (tree)
|
|
osi_decode_tp_var_part(pd, offset, li, 4, cotp_tree);
|
|
offset += li;
|
|
|
|
old_dissect_data(pd, offset, fd, tree);
|
|
|
|
return pi.captured_len; /* we dissected all of the containing PDU */
|
|
|
|
} /* osi_decode_ED */
|
|
|
|
static int osi_decode_RJ(const u_char *pd, int offset,
|
|
frame_data *fd, proto_tree *tree)
|
|
{
|
|
proto_tree *cotp_tree;
|
|
proto_item *ti;
|
|
u_int tpdu_nr ;
|
|
u_short credit = 0;
|
|
|
|
switch(li) {
|
|
case LI_NORMAL_RJ :
|
|
tpdu_nr = pd[offset + P_TPDU_NR_234];
|
|
break;
|
|
case LI_EXTENDED_RJ :
|
|
tpdu_nr = EXTRACT_LONG(&pd[offset + P_TPDU_NR_234]);
|
|
credit = EXTRACT_SHORT(&pd[offset + P_CDT_IN_RJ]);
|
|
break;
|
|
default :
|
|
return -1;
|
|
/*NOTREACHED*/
|
|
break;
|
|
}
|
|
|
|
if (check_col(fd, COL_INFO))
|
|
col_append_fstr(fd, COL_INFO, "RJ TPDU (%u) dst-ref: 0x%04x",
|
|
tpdu_nr, dst_ref);
|
|
|
|
if (tree) {
|
|
ti = proto_tree_add_item(tree, proto_cotp, NullTVB, offset, li + 1, FALSE);
|
|
cotp_tree = proto_item_add_subtree(ti, ett_cotp);
|
|
proto_tree_add_text(cotp_tree, NullTVB, offset, 1,
|
|
"Length indicator: %u", li);
|
|
proto_tree_add_text(cotp_tree, NullTVB, offset + 1, 1,
|
|
"TPDU code: 0x%x (RJ)", tpdu);
|
|
if (li == LI_NORMAL_RJ)
|
|
proto_tree_add_text(cotp_tree, NullTVB, offset + 1, 1,
|
|
"Credit: %u", cdt);
|
|
proto_tree_add_text(cotp_tree, NullTVB, offset + 2, 2,
|
|
"Destination reference: 0x%04x", dst_ref);
|
|
if (li == LI_NORMAL_RJ)
|
|
proto_tree_add_text(cotp_tree, NullTVB, offset + 4, 1,
|
|
"Your TPDU number: 0x%02x", tpdu_nr);
|
|
else {
|
|
proto_tree_add_text(cotp_tree, NullTVB, offset + 4, 4,
|
|
"Your TPDU number: 0x%02x", tpdu_nr);
|
|
proto_tree_add_text(cotp_tree, NullTVB, offset + 8, 2,
|
|
"Credit: 0x%02x", credit);
|
|
}
|
|
}
|
|
|
|
offset += li + 1;
|
|
|
|
return offset;
|
|
|
|
} /* osi_decode_RJ */
|
|
|
|
static int osi_decode_CC(const u_char *pd, int offset,
|
|
frame_data *fd, proto_tree *tree)
|
|
{
|
|
|
|
/* CC & CR decoding in the same function */
|
|
|
|
proto_tree *cotp_tree = NULL;
|
|
proto_item *ti;
|
|
u_short src_ref;
|
|
u_char class_option;
|
|
|
|
src_ref = EXTRACT_SHORT(&pd[offset + P_SRC_REF]);
|
|
class_option = (pd[offset + P_CLASS_OPTION] >> 4 ) & 0x0F;
|
|
if (class_option > 4)
|
|
return -1;
|
|
|
|
if (check_col(fd, COL_INFO))
|
|
col_append_fstr(fd, COL_INFO, "%s TPDU src-ref: 0x%04x dst-ref: 0x%04x",
|
|
(tpdu == CR_TPDU) ? "CR" : "CC",
|
|
src_ref,
|
|
dst_ref);
|
|
|
|
if (tree) {
|
|
ti = proto_tree_add_item(tree, proto_cotp, NullTVB, offset, li + 1, FALSE);
|
|
cotp_tree = proto_item_add_subtree(ti, ett_cotp);
|
|
proto_tree_add_text(cotp_tree, NullTVB, offset, 1,
|
|
"Length indicator: %u", li);
|
|
}
|
|
offset += 1;
|
|
|
|
if (tree) {
|
|
proto_tree_add_text(cotp_tree, NullTVB, offset, 1,
|
|
"TPDU code: 0x%x (%s)", tpdu,
|
|
(tpdu == CR_TPDU) ? "CR" : "CC");
|
|
}
|
|
offset += 1;
|
|
li -= 1;
|
|
|
|
if (tree) {
|
|
proto_tree_add_text(cotp_tree, NullTVB, offset, 2,
|
|
"Destination reference: 0x%04x", dst_ref);
|
|
}
|
|
offset += 2;
|
|
li -= 2;
|
|
|
|
if (tree) {
|
|
proto_tree_add_text(cotp_tree, NullTVB, offset, 2,
|
|
"Source reference: 0x%04x", src_ref);
|
|
}
|
|
offset += 2;
|
|
li -= 2;
|
|
|
|
if (tree) {
|
|
proto_tree_add_text(cotp_tree, NullTVB, offset, 1,
|
|
"Class option: 0x%02x", class_option);
|
|
}
|
|
offset += 1;
|
|
li -= 1;
|
|
|
|
if (tree)
|
|
osi_decode_tp_var_part(pd, offset, li, class_option, cotp_tree);
|
|
offset += li;
|
|
|
|
old_dissect_data(pd, offset, fd, tree);
|
|
|
|
return pi.captured_len; /* we dissected all of the containing PDU */
|
|
|
|
} /* osi_decode_CC */
|
|
|
|
static int osi_decode_DC(const u_char *pd, int offset,
|
|
frame_data *fd, proto_tree *tree)
|
|
{
|
|
proto_tree *cotp_tree = NULL;
|
|
proto_item *ti;
|
|
u_short src_ref;
|
|
|
|
if (li > LI_MAX_DC)
|
|
return -1;
|
|
|
|
src_ref = EXTRACT_SHORT(&pd[offset + P_SRC_REF]);
|
|
|
|
if (check_col(fd, COL_INFO))
|
|
col_append_fstr(fd, COL_INFO, "DC TPDU src-ref: 0x%04x dst-ref: 0x%04x",
|
|
src_ref,
|
|
dst_ref);
|
|
|
|
if (tree) {
|
|
ti = proto_tree_add_item(tree, proto_cotp, NullTVB, offset, li + 1, FALSE);
|
|
cotp_tree = proto_item_add_subtree(ti, ett_cotp);
|
|
proto_tree_add_text(cotp_tree, NullTVB, offset, 1,
|
|
"Length indicator: %u", li);
|
|
}
|
|
offset += 1;
|
|
|
|
if (tree) {
|
|
proto_tree_add_text(cotp_tree, NullTVB, offset, 1,
|
|
"TPDU code: 0x%x (DC)", tpdu);
|
|
}
|
|
offset += 1;
|
|
li -= 1;
|
|
|
|
if (tree) {
|
|
proto_tree_add_text(cotp_tree, NullTVB, offset, 2,
|
|
"Destination reference: 0x%04x", dst_ref);
|
|
}
|
|
offset += 2;
|
|
li -= 2;
|
|
|
|
if (tree) {
|
|
proto_tree_add_text(cotp_tree, NullTVB, offset, 2,
|
|
"Source reference: 0x%04x", src_ref);
|
|
}
|
|
offset += 2;
|
|
li -= 2;
|
|
|
|
if (tree)
|
|
osi_decode_tp_var_part(pd, offset, li, 4, cotp_tree);
|
|
offset += li;
|
|
|
|
return offset;
|
|
|
|
} /* osi_decode_DC */
|
|
|
|
static int osi_decode_AK(const u_char *pd, int offset,
|
|
frame_data *fd, proto_tree *tree)
|
|
{
|
|
proto_tree *cotp_tree = NULL;
|
|
proto_item *ti;
|
|
u_int tpdu_nr;
|
|
u_short cdt_in_ak;
|
|
|
|
if (li > LI_MAX_AK)
|
|
return -1;
|
|
|
|
if (is_LI_NORMAL_AK(li)) {
|
|
|
|
tpdu_nr = pd[offset + P_TPDU_NR_234];
|
|
|
|
if (check_col(fd, COL_INFO))
|
|
col_append_fstr(fd, COL_INFO, "AK TPDU (%u) dst-ref: 0x%04x",
|
|
tpdu_nr, dst_ref);
|
|
|
|
if (tree) {
|
|
ti = proto_tree_add_item(tree, proto_cotp, NullTVB, offset, li + 1, FALSE);
|
|
cotp_tree = proto_item_add_subtree(ti, ett_cotp);
|
|
proto_tree_add_text(cotp_tree, NullTVB, offset, 1,
|
|
"Length indicator: %u", li);
|
|
}
|
|
offset += 1;
|
|
|
|
if (tree) {
|
|
proto_tree_add_text(cotp_tree, NullTVB, offset, 1,
|
|
"TPDU code: 0x%x (AK)", tpdu);
|
|
proto_tree_add_text(cotp_tree, NullTVB, offset, 1,
|
|
"Credit: %u", cdt);
|
|
}
|
|
offset += 1;
|
|
li -= 1;
|
|
|
|
if (tree) {
|
|
proto_tree_add_text(cotp_tree, NullTVB, offset, 2,
|
|
"Destination reference: 0x%04x", dst_ref);
|
|
}
|
|
offset += 2;
|
|
li -= 2;
|
|
|
|
if (tree) {
|
|
proto_tree_add_text(cotp_tree, NullTVB, offset, 1,
|
|
"Your TPDU number: 0x%02x", tpdu_nr);
|
|
}
|
|
offset += 1;
|
|
li -= 1;
|
|
|
|
if (tree)
|
|
osi_decode_tp_var_part(pd, offset, li, 4, cotp_tree);
|
|
offset += li;
|
|
|
|
} else { /* extended format */
|
|
|
|
tpdu_nr = EXTRACT_LONG(&pd[offset + P_TPDU_NR_234]);
|
|
cdt_in_ak = EXTRACT_SHORT(&pd[offset + P_CDT_IN_AK]);
|
|
|
|
if (check_col(fd, COL_INFO))
|
|
col_append_fstr(fd, COL_INFO, "AK TPDU (%u) dst-ref: 0x%04x",
|
|
tpdu_nr, dst_ref);
|
|
|
|
if (tree) {
|
|
ti = proto_tree_add_item(tree, proto_cotp, NullTVB, offset, li + 1, FALSE);
|
|
cotp_tree = proto_item_add_subtree(ti, ett_cotp);
|
|
proto_tree_add_text(cotp_tree, NullTVB, offset, 1,
|
|
"Length indicator: %u", li);
|
|
}
|
|
offset += 1;
|
|
|
|
if (tree) {
|
|
proto_tree_add_text(cotp_tree, NullTVB, offset, 1,
|
|
"TPDU code: 0x%x (AK)", tpdu);
|
|
}
|
|
offset += 1;
|
|
li -= 1;
|
|
|
|
if (tree) {
|
|
proto_tree_add_text(cotp_tree, NullTVB, offset, 2,
|
|
"Destination reference: 0x%04x", dst_ref);
|
|
}
|
|
offset += 2;
|
|
li -= 2;
|
|
|
|
if (tree) {
|
|
proto_tree_add_text(cotp_tree, NullTVB, offset, 4,
|
|
"Your TPDU number: 0x%08x", tpdu_nr);
|
|
}
|
|
offset += 4;
|
|
li -= 4;
|
|
|
|
if (tree) {
|
|
proto_tree_add_text(cotp_tree, NullTVB, offset, 2,
|
|
"Credit: 0x%04x", cdt_in_ak);
|
|
}
|
|
offset += 2;
|
|
li -= 2;
|
|
|
|
if (tree)
|
|
osi_decode_tp_var_part(pd, offset, li, 4, cotp_tree);
|
|
offset += li;
|
|
|
|
} /* is_LI_NORMAL_AK */
|
|
|
|
return offset;
|
|
|
|
} /* osi_decode_AK */
|
|
|
|
static int osi_decode_EA(const u_char *pd, int offset,
|
|
frame_data *fd, proto_tree *tree)
|
|
{
|
|
proto_tree *cotp_tree = NULL;
|
|
proto_item *ti;
|
|
gboolean is_extended;
|
|
u_int tpdu_nr ;
|
|
|
|
if (li > LI_MAX_EA)
|
|
return -1;
|
|
|
|
/* VP_CHECKSUM is the only parameter allowed in the variable part.
|
|
(This means we may misdissect this if the packet is bad and
|
|
contains other parameters.) */
|
|
switch (li) {
|
|
|
|
case LI_NORMAL_EA_WITH_CHECKSUM :
|
|
if (pd[offset + P_VAR_PART_NDT] != VP_CHECKSUM ||
|
|
pd[offset + P_VAR_PART_NDT + 1] != 2)
|
|
return -1;
|
|
/* FALLTHROUGH */
|
|
|
|
case LI_NORMAL_EA_WITHOUT_CHECKSUM :
|
|
tpdu_nr = pd[offset + P_TPDU_NR_234];
|
|
is_extended = FALSE;
|
|
break;
|
|
|
|
case LI_EXTENDED_EA_WITH_CHECKSUM :
|
|
if (pd[offset + P_VAR_PART_EDT] != VP_CHECKSUM ||
|
|
pd[offset + P_VAR_PART_EDT + 1] != 2)
|
|
return -1;
|
|
/* FALLTHROUGH */
|
|
|
|
case LI_EXTENDED_EA_WITHOUT_CHECKSUM :
|
|
tpdu_nr = EXTRACT_LONG(&pd[offset + P_TPDU_NR_234]);
|
|
is_extended = TRUE;
|
|
break;
|
|
|
|
default : /* bad TPDU */
|
|
return -1;
|
|
/*NOTREACHED*/
|
|
break;
|
|
} /* li */
|
|
|
|
if (check_col(fd, COL_INFO))
|
|
col_append_fstr(fd, COL_INFO,
|
|
"EA TPDU (%u) dst-ref: 0x%04x", tpdu_nr, dst_ref);
|
|
|
|
if (tree) {
|
|
ti = proto_tree_add_item(tree, proto_cotp, NullTVB, offset, li + 1, FALSE);
|
|
cotp_tree = proto_item_add_subtree(ti, ett_cotp);
|
|
proto_tree_add_text(cotp_tree, NullTVB, offset, 1,
|
|
"Length indicator: %u", li);
|
|
}
|
|
offset += 1;
|
|
|
|
if (tree) {
|
|
proto_tree_add_text(cotp_tree, NullTVB, offset, 1,
|
|
"TPDU code: 0x%x (EA)", tpdu);
|
|
}
|
|
offset += 1;
|
|
li -= 1;
|
|
|
|
if (tree) {
|
|
proto_tree_add_text(cotp_tree, NullTVB, offset, 2,
|
|
"Destination reference: 0x%04x", dst_ref);
|
|
}
|
|
offset += 2;
|
|
li -= 2;
|
|
|
|
if (is_extended) {
|
|
if (tree) {
|
|
proto_tree_add_text(cotp_tree, NullTVB, offset, 4,
|
|
"Your TPDU number: 0x%08x", tpdu_nr);
|
|
}
|
|
offset += 4;
|
|
li -= 4;
|
|
} else {
|
|
if (tree) {
|
|
proto_tree_add_text(cotp_tree, NullTVB, offset, 1,
|
|
"Your TPDU number: 0x%02x", tpdu_nr);
|
|
}
|
|
offset += 1;
|
|
li -= 1;
|
|
}
|
|
|
|
if (tree)
|
|
osi_decode_tp_var_part(pd, offset, li, 4, cotp_tree);
|
|
offset += li;
|
|
|
|
return offset;
|
|
|
|
} /* osi_decode_EA */
|
|
|
|
static int osi_decode_ER(const u_char *pd, int offset,
|
|
frame_data *fd, proto_tree *tree)
|
|
{
|
|
proto_tree *cotp_tree;
|
|
proto_item *ti;
|
|
u_char *str;
|
|
|
|
if (li > LI_MAX_ER)
|
|
return -1;
|
|
|
|
switch(pd[offset + P_REJECT_ER]) {
|
|
case 0 :
|
|
str = "Reason not specified";
|
|
break;
|
|
case 1 :
|
|
str = "Invalid parameter code";
|
|
break;
|
|
case 2 :
|
|
str = "Invalid TPDU type";
|
|
break;
|
|
case 3 :
|
|
str = "Invalid parameter value";
|
|
break;
|
|
default:
|
|
return -1;
|
|
/*NOTREACHED*/
|
|
break;
|
|
}
|
|
|
|
if (check_col(fd, COL_INFO))
|
|
col_append_fstr(fd, COL_INFO, "ER TPDU dst-ref: 0x%04x", dst_ref);
|
|
|
|
if (tree) {
|
|
ti = proto_tree_add_item(tree, proto_cotp, NullTVB, offset, li + 1, FALSE);
|
|
cotp_tree = proto_item_add_subtree(ti, ett_cotp);
|
|
proto_tree_add_text(cotp_tree, NullTVB, offset, 1,
|
|
"Length indicator: %u", li);
|
|
proto_tree_add_text(cotp_tree, NullTVB, offset + 1, 1,
|
|
"TPDU code: 0x%x (ER)", tpdu);
|
|
proto_tree_add_text(cotp_tree, NullTVB, offset + 2, 2,
|
|
"Destination reference: 0x%04x", dst_ref);
|
|
proto_tree_add_text(cotp_tree, NullTVB, offset + 4, 1,
|
|
"Reject cause: %s", str);
|
|
}
|
|
|
|
offset += li + 1;
|
|
|
|
return offset;
|
|
|
|
} /* osi_decode_ER */
|
|
|
|
/* Returns TRUE if we called a sub-dissector, FALSE if not. */
|
|
static gboolean osi_decode_UD(const u_char *pd, int offset,
|
|
frame_data *fd, proto_tree *tree)
|
|
{
|
|
proto_item *ti;
|
|
proto_tree *cltp_tree = NULL;
|
|
|
|
if (check_col(fd, COL_INFO))
|
|
col_append_str(fd, COL_INFO, "UD TPDU");
|
|
|
|
if (tree) {
|
|
ti = proto_tree_add_item(tree, proto_cltp, NullTVB, offset, li + 1, FALSE);
|
|
cltp_tree = proto_item_add_subtree(ti, ett_cltp);
|
|
proto_tree_add_text(cltp_tree, NullTVB, offset, 1,
|
|
"Length indicator: %u", li);
|
|
}
|
|
offset += 1;
|
|
|
|
if (tree) {
|
|
proto_tree_add_text(cltp_tree, NullTVB, offset, 1,
|
|
"TPDU code: 0x%x (UD)", tpdu);
|
|
}
|
|
offset += 1;
|
|
li -= 1;
|
|
|
|
if (tree)
|
|
osi_decode_tp_var_part(pd, offset, li, 0, cltp_tree);
|
|
offset += li;
|
|
|
|
old_dissect_data(pd, offset, fd, tree);
|
|
return FALSE;
|
|
} /* osi_decode_UD */
|
|
|
|
/* Returns TRUE if we found at least one valid COTP or CLTP PDU, FALSE
|
|
otherwise.
|
|
|
|
There doesn't seem to be any way in which the OSI network layer protocol
|
|
distinguishes between COTP and CLTP, but the first two octets of both
|
|
protocols' headers mean the same thing - length and PDU type - and the
|
|
only valid CLTP PDU type is not a valid COTP PDU type, so we'll handle
|
|
both of them here. */
|
|
static gboolean dissect_ositp_internal(const u_char *pd, int offset,
|
|
frame_data *fd, proto_tree *tree,
|
|
gboolean uses_inactive_subset)
|
|
{
|
|
gboolean first_tpdu = TRUE;
|
|
int new_offset;
|
|
gboolean found_ositp = FALSE;
|
|
gboolean is_cltp = FALSE;
|
|
gboolean subdissector_found = FALSE;
|
|
|
|
/* Initialize the COL_INFO field; each of the TPDUs will have its
|
|
information appended. */
|
|
if (check_col(fd, COL_INFO))
|
|
col_add_str(fd, COL_INFO, "");
|
|
|
|
while (IS_DATA_IN_FRAME(offset)) {
|
|
if (!first_tpdu) {
|
|
if (check_col(fd, COL_INFO))
|
|
col_append_str(fd, COL_INFO, ", ");
|
|
}
|
|
if ((li = pd[offset + P_LI]) == 0) {
|
|
if (check_col(fd, COL_INFO))
|
|
col_append_str(fd, COL_INFO, "Length indicator is zero");
|
|
if (!first_tpdu)
|
|
old_dissect_data(pd, offset, fd, tree);
|
|
return found_ositp;
|
|
}
|
|
if (!BYTES_ARE_IN_FRAME(offset, P_LI + li + 1)) {
|
|
if (check_col(fd, COL_INFO))
|
|
col_append_str(fd, COL_INFO, "Captured data in frame doesn't include entire frame");
|
|
if (!first_tpdu)
|
|
old_dissect_data(pd, offset, fd, tree);
|
|
return found_ositp;
|
|
}
|
|
|
|
tpdu = (pd[offset + P_TPDU] >> 4) & 0x0F;
|
|
cdt = pd[offset + P_CDT] & 0x0F;
|
|
dst_ref = EXTRACT_SHORT(&pd[offset + P_DST_REF]);
|
|
|
|
switch (tpdu) {
|
|
case CC_TPDU :
|
|
case CR_TPDU :
|
|
new_offset = osi_decode_CC(pd, offset, fd, tree);
|
|
break;
|
|
case DR_TPDU :
|
|
new_offset = osi_decode_DR(pd, offset, fd, tree);
|
|
break;
|
|
case DT_TPDU :
|
|
if (osi_decode_DT(pd, offset, fd, tree, uses_inactive_subset))
|
|
subdissector_found = TRUE;
|
|
new_offset = pi.captured_len; /* DT PDUs run to the end of the packet */
|
|
break;
|
|
case ED_TPDU :
|
|
new_offset = osi_decode_ED(pd, offset, fd, tree);
|
|
break;
|
|
case RJ_TPDU :
|
|
new_offset = osi_decode_RJ(pd, offset, fd, tree);
|
|
break;
|
|
case DC_TPDU :
|
|
new_offset = osi_decode_DC(pd, offset, fd, tree);
|
|
break;
|
|
case AK_TPDU :
|
|
new_offset = osi_decode_AK(pd, offset, fd, tree);
|
|
break;
|
|
case EA_TPDU :
|
|
new_offset = osi_decode_EA(pd, offset, fd, tree);
|
|
break;
|
|
case ER_TPDU :
|
|
new_offset = osi_decode_ER(pd, offset, fd, tree);
|
|
break;
|
|
case UD_TPDU :
|
|
if (osi_decode_UD(pd, offset, fd, tree))
|
|
subdissector_found = TRUE;
|
|
new_offset = pi.captured_len; /* UD PDUs run to the end of the packet */
|
|
is_cltp = TRUE;
|
|
break;
|
|
default :
|
|
if (first_tpdu && check_col(fd, COL_INFO))
|
|
col_append_fstr(fd, COL_INFO, "Unknown TPDU type (0x%x)", tpdu);
|
|
new_offset = -1; /* bad PDU type */
|
|
break;
|
|
}
|
|
|
|
if (new_offset == -1) { /* incorrect TPDU */
|
|
if (!first_tpdu)
|
|
old_dissect_data(pd, offset, fd, tree);
|
|
break;
|
|
}
|
|
|
|
if (first_tpdu) {
|
|
/* Well, we found at least one valid COTP or CLTP PDU, so I guess this
|
|
is either COTP or CLTP. */
|
|
if (!subdissector_found && check_col(fd, COL_PROTOCOL))
|
|
col_add_str(fd, COL_PROTOCOL, is_cltp ? "CLTP" : "COTP");
|
|
found_ositp = TRUE;
|
|
}
|
|
|
|
offset = new_offset;
|
|
first_tpdu = FALSE;
|
|
}
|
|
return found_ositp;
|
|
} /* dissect_ositp_internal */
|
|
|
|
void dissect_ositp(const u_char *pd, int offset, frame_data *fd,
|
|
proto_tree *tree)
|
|
{
|
|
OLD_CHECK_DISPLAY_AS_DATA(proto_cotp, pd, offset, fd, tree);
|
|
if (!dissect_ositp_internal(pd, offset, fd, tree, FALSE))
|
|
old_dissect_data(pd, offset, fd, tree);
|
|
}
|
|
|
|
|
|
/*
|
|
* CLNP part / main entry point
|
|
*/
|
|
|
|
static void dissect_clnp(const u_char *pd, int offset, frame_data *fd,
|
|
proto_tree *tree)
|
|
{
|
|
|
|
struct clnp_header clnp;
|
|
proto_tree *clnp_tree = NULL;
|
|
proto_item *ti;
|
|
u_char src_len, dst_len, nsel, opt_len = 0;
|
|
u_int first_offset = offset;
|
|
char flag_string[6+1];
|
|
char *pdu_type_string;
|
|
guint16 segment_length;
|
|
guint16 segment_offset = 0;
|
|
guint len;
|
|
|
|
OLD_CHECK_DISPLAY_AS_DATA(proto_clnp, pd, offset, fd, tree);
|
|
|
|
if (check_col(fd, COL_PROTOCOL))
|
|
col_add_str(fd, COL_PROTOCOL, "CLNP");
|
|
|
|
/* avoid alignment problem */
|
|
memcpy(&clnp, &pd[offset], sizeof(clnp));
|
|
|
|
if (clnp.cnf_proto_id == NLPID_NULL) {
|
|
if (check_col(fd, COL_INFO))
|
|
col_add_str(fd, COL_INFO, "Inactive subset");
|
|
if (tree) {
|
|
ti = proto_tree_add_item(tree, proto_clnp, NullTVB, offset, 1, FALSE);
|
|
clnp_tree = proto_item_add_subtree(ti, ett_clnp);
|
|
proto_tree_add_uint_format(clnp_tree, hf_clnp_id, NullTVB, offset, 1,
|
|
clnp.cnf_proto_id,
|
|
"Inactive subset");
|
|
}
|
|
dissect_ositp_internal(pd, offset+1, fd, tree, TRUE);
|
|
return;
|
|
}
|
|
|
|
if (!BYTES_ARE_IN_FRAME(offset, sizeof(clnp))) {
|
|
old_dissect_data(pd, offset, fd, tree);
|
|
return;
|
|
}
|
|
|
|
/* return if version not known */
|
|
if (clnp.cnf_vers != ISO8473_V1) {
|
|
old_dissect_data(pd, offset, fd, tree);
|
|
return;
|
|
}
|
|
|
|
/* fixed part decoding */
|
|
opt_len = clnp.cnf_hdr_len;
|
|
|
|
segment_length = EXTRACT_SHORT(&clnp.cnf_seglen_msb);
|
|
flag_string[0] = '\0';
|
|
if (clnp.cnf_type & CNF_SEG_OK)
|
|
strcat(flag_string, "S ");
|
|
if (clnp.cnf_type & CNF_MORE_SEGS)
|
|
strcat(flag_string, "M ");
|
|
if (clnp.cnf_type & CNF_ERR_OK)
|
|
strcat(flag_string, "E ");
|
|
pdu_type_string = val_to_str(clnp.cnf_type & CNF_TYPE, npdu_type_vals,
|
|
"Unknown (0x%02x)");
|
|
if (tree) {
|
|
ti = proto_tree_add_item(tree, proto_clnp, NullTVB, offset, clnp.cnf_hdr_len, FALSE);
|
|
clnp_tree = proto_item_add_subtree(ti, ett_clnp);
|
|
proto_tree_add_uint(clnp_tree, hf_clnp_id, NullTVB, offset, 1,
|
|
clnp.cnf_proto_id);
|
|
proto_tree_add_uint(clnp_tree, hf_clnp_length, NullTVB, offset + 1, 1,
|
|
clnp.cnf_hdr_len);
|
|
proto_tree_add_uint(clnp_tree, hf_clnp_version, NullTVB, offset + 2, 1,
|
|
clnp.cnf_vers);
|
|
proto_tree_add_uint_format(clnp_tree, hf_clnp_ttl, NullTVB, offset + 3, 1,
|
|
clnp.cnf_ttl,
|
|
"Holding Time : %u (%u secs)",
|
|
clnp.cnf_ttl, clnp.cnf_ttl / 2);
|
|
proto_tree_add_uint_format(clnp_tree, hf_clnp_type, NullTVB, offset + 4, 1,
|
|
clnp.cnf_type,
|
|
"PDU Type : 0x%02x (%s%s)",
|
|
clnp.cnf_type,
|
|
flag_string,
|
|
pdu_type_string);
|
|
proto_tree_add_uint(clnp_tree, hf_clnp_pdu_length, NullTVB, offset + 5, 2,
|
|
segment_length);
|
|
proto_tree_add_uint_format(clnp_tree, hf_clnp_checksum, NullTVB, offset + 7, 2,
|
|
EXTRACT_SHORT(&clnp.cnf_cksum_msb),
|
|
"Checksum : 0x%04x",
|
|
EXTRACT_SHORT(&clnp.cnf_cksum_msb));
|
|
opt_len -= 9; /* Fixed part of Hesder */
|
|
} /* tree */
|
|
|
|
/* stop here if header is not complete */
|
|
|
|
if (!BYTES_ARE_IN_FRAME(offset, clnp.cnf_hdr_len)) {
|
|
if (check_col(fd, COL_INFO))
|
|
col_add_fstr(fd, COL_INFO, "%s NPDU %s", pdu_type_string, flag_string);
|
|
old_dissect_data(pd, offset, fd, tree);
|
|
return;
|
|
}
|
|
|
|
/* address part */
|
|
|
|
offset += P_ADDRESS_PART;
|
|
dst_len = pd[offset];
|
|
nsel = pd[offset + dst_len];
|
|
src_len = pd[offset + dst_len + 1];
|
|
|
|
if (tree) {
|
|
proto_tree_add_uint(clnp_tree, hf_clnp_dest_length, NullTVB, offset, 1,
|
|
dst_len);
|
|
proto_tree_add_bytes_format(clnp_tree, hf_clnp_dest, NullTVB, offset + 1 , dst_len,
|
|
&pd[offset + 1],
|
|
" DA : %s",
|
|
print_nsap_net(&pd[offset + 1], dst_len));
|
|
proto_tree_add_uint(clnp_tree, hf_clnp_src_length, NullTVB,
|
|
offset + 1 + dst_len, 1, src_len);
|
|
proto_tree_add_bytes_format(clnp_tree, hf_clnp_src, NullTVB,
|
|
offset + dst_len + 2, src_len,
|
|
&pd[offset + dst_len + 2],
|
|
" SA : %s",
|
|
print_nsap_net(&pd[offset + dst_len + 2], src_len));
|
|
|
|
opt_len -= dst_len + src_len +2;
|
|
}
|
|
|
|
if (check_col(fd, COL_RES_NET_SRC))
|
|
col_add_fstr(fd, COL_RES_NET_SRC, "%s",
|
|
print_nsap_net(&pd[offset + dst_len + 2], src_len));
|
|
if (check_col(fd, COL_RES_NET_DST))
|
|
col_add_fstr(fd, COL_RES_NET_DST, "%s",
|
|
print_nsap_net(&pd[offset + 1], dst_len));
|
|
|
|
/* Segmentation Part */
|
|
|
|
offset += dst_len + src_len + 2;
|
|
|
|
if (clnp.cnf_type & CNF_SEG_OK) {
|
|
struct clnp_segment seg; /* XXX - not used */
|
|
memcpy(&seg, &pd[offset], sizeof(seg)); /* XXX - not used */
|
|
|
|
segment_offset = EXTRACT_SHORT(&pd[offset + 2]);
|
|
if (tree) {
|
|
proto_tree_add_text(clnp_tree, NullTVB, offset, 2,
|
|
"Data unit identifier: %06u",
|
|
EXTRACT_SHORT(&pd[offset]));
|
|
proto_tree_add_text(clnp_tree, NullTVB, offset + 2 , 2,
|
|
"Segment offset : %6u",
|
|
segment_offset);
|
|
proto_tree_add_text(clnp_tree, NullTVB, offset + 4 , 2,
|
|
"Total length : %6u",
|
|
EXTRACT_SHORT(&pd[offset + 4]));
|
|
}
|
|
|
|
offset += 6;
|
|
opt_len -= 6;
|
|
}
|
|
|
|
if (tree) {
|
|
/* To do : decode options */
|
|
/*
|
|
proto_tree_add_text(clnp_tree, NullTVB, offset,
|
|
clnp.cnf_hdr_len + first_offset - offset,
|
|
"Options/Data: <not shown>");
|
|
*/
|
|
/* QUICK HACK Option Len:= PDU_Hd_length-( FixedPart+AddresPart+SegmentPart )*/
|
|
|
|
dissect_osi_options( 0xff,
|
|
opt_len,
|
|
pd, offset, fd, clnp_tree );
|
|
}
|
|
|
|
/* Length of CLNP datagram plus headers above it. */
|
|
len = segment_length + first_offset;
|
|
|
|
/* Set the payload and captured-payload lengths to the minima of (the
|
|
datagram length plus the length of the headers above it) and the
|
|
frame lengths. */
|
|
if (pi.len > len)
|
|
pi.len = len;
|
|
if (pi.captured_len > len)
|
|
pi.captured_len = len;
|
|
|
|
offset = first_offset + clnp.cnf_hdr_len;
|
|
|
|
/* For now, dissect the payload of segments other than the initial
|
|
segment as data, rather than handing them off to the transport
|
|
protocol, just as we do with fragments other than the first
|
|
fragment in a fragmented IP datagram; in the future, we will
|
|
probably reassemble fragments for IP, and may reassemble segments
|
|
for CLNP. */
|
|
if ((clnp.cnf_type & CNF_SEG_OK) && segment_offset != 0) {
|
|
if (check_col(fd, COL_INFO))
|
|
col_add_fstr(fd, COL_INFO, "Fragmented %s NPDU %s(off=%u)",
|
|
pdu_type_string, flag_string, segment_offset);
|
|
old_dissect_data(pd, offset, fd, tree);
|
|
return;
|
|
}
|
|
|
|
if (IS_DATA_IN_FRAME(offset)) {
|
|
switch (clnp.cnf_type & CNF_TYPE) {
|
|
|
|
case DT_NPDU:
|
|
case MD_NPDU:
|
|
/* Continue with COTP if any data.
|
|
XXX - if this isn't the first Derived PDU of a segmented Initial
|
|
PDU, skip that? */
|
|
|
|
if (nsel == (char)tp_nsap_selector || always_decode_transport) {
|
|
if (dissect_ositp_internal(pd, offset, fd, tree, FALSE))
|
|
return; /* yes, it appears to be COTP or CLTP */
|
|
}
|
|
break;
|
|
|
|
case ER_NPDU:
|
|
/* The payload is the header and "none, some, or all of the data
|
|
part of the discarded PDU", i.e. it's like an ICMP error;
|
|
just as we don't yet trust ourselves to be able to dissect
|
|
the payload of an ICMP error packet, we don't yet trust
|
|
ourselves to dissect the payload of a CLNP ER packet. */
|
|
break;
|
|
|
|
case ERQ_NPDU:
|
|
case ERP_NPDU:
|
|
/* XXX - dissect this */
|
|
break;
|
|
}
|
|
}
|
|
if (check_col(fd, COL_INFO))
|
|
col_add_fstr(fd, COL_INFO, "%s NPDU %s", pdu_type_string, flag_string);
|
|
old_dissect_data(pd, offset, fd, tree);
|
|
|
|
} /* dissect_clnp */
|
|
|
|
|
|
void proto_register_clnp(void)
|
|
{
|
|
static hf_register_info hf[] = {
|
|
{ &hf_clnp_id,
|
|
{ "Network Layer Protocol Identifier", "clnp.nlpi", FT_UINT8, BASE_HEX,
|
|
VALS(nlpid_vals), 0x0, "" }},
|
|
|
|
{ &hf_clnp_length,
|
|
{ "HDR Length ", "clnp.len", FT_UINT8, BASE_DEC, NULL, 0x0, "" }},
|
|
|
|
{ &hf_clnp_version,
|
|
{ "Version ", "clnp.version", FT_UINT8, BASE_DEC, NULL, 0x0, "" }},
|
|
|
|
{ &hf_clnp_ttl,
|
|
{ "Holding Time ", "clnp.ttl", FT_UINT8, BASE_DEC, NULL, 0x0, "" }},
|
|
|
|
{ &hf_clnp_type,
|
|
{ "PDU Type ", "clnp.type", FT_UINT8, BASE_DEC, NULL, 0x0, "" }},
|
|
|
|
{ &hf_clnp_pdu_length,
|
|
{ "PDU length ", "clnp.pdu.len", FT_UINT16, BASE_DEC, NULL, 0x0, "" }},
|
|
|
|
{ &hf_clnp_checksum,
|
|
{ "Checksum ", "clnp.checksum", FT_UINT16, BASE_DEC, NULL, 0x0, "" }},
|
|
|
|
{ &hf_clnp_dest_length,
|
|
{ "DAL ", "clnp.dsap.len", FT_UINT8, BASE_DEC, NULL, 0x0, "" }},
|
|
|
|
{ &hf_clnp_dest,
|
|
{ " DA ", "clnp.dsap", FT_BYTES, BASE_NONE, NULL, 0x0, "" }},
|
|
|
|
{ &hf_clnp_src_length,
|
|
{ "SAL ", "clnp.ssap.len", FT_UINT8, BASE_DEC, NULL, 0x0, "" }},
|
|
|
|
{ &hf_clnp_src,
|
|
{ " SA ", "clnp.ssap", FT_BYTES, BASE_NONE, NULL, 0x0, "" }},
|
|
};
|
|
static gint *ett[] = {
|
|
&ett_clnp,
|
|
};
|
|
|
|
module_t *clnp_module;
|
|
|
|
proto_clnp = proto_register_protocol(PROTO_STRING_CLNP, "clnp");
|
|
proto_register_field_array(proto_clnp, hf, array_length(hf));
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
|
|
clnp_module = prefs_register_module("clnp", "CLNP", NULL);
|
|
prefs_register_uint_preference(clnp_module, "tp_nsap_selector",
|
|
"NSAP selector for Transport Protocol (last byte in hexa)",
|
|
"NSAP selector for Transport Protocol (last byte in hexa)",
|
|
16, &tp_nsap_selector);
|
|
prefs_register_bool_preference(clnp_module, "always_decode_transport",
|
|
"Always try to decode NSDU as transport PDUs",
|
|
"Always try to decode NSDU as transport PDUs",
|
|
&always_decode_transport);
|
|
|
|
}
|
|
|
|
void proto_register_cotp(void)
|
|
{
|
|
/* static hf_register_info hf[] = {
|
|
{ &variable,
|
|
{ "Name", "cotp.abbreviation", TYPE, VALS_POINTER }},
|
|
};*/
|
|
static gint *ett[] = {
|
|
&ett_cotp,
|
|
};
|
|
|
|
proto_cotp = proto_register_protocol(PROTO_STRING_COTP, "cotp");
|
|
/* proto_register_field_array(proto_cotp, hf, array_length(hf));*/
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
|
|
/* subdissector code */
|
|
register_heur_dissector_list("cotp_is", &cotp_is_heur_subdissector_list);
|
|
}
|
|
|
|
void proto_register_cltp(void)
|
|
{
|
|
/* static hf_register_info hf[] = {
|
|
{ &variable,
|
|
{ "Name", "cltp.abbreviation", TYPE, VALS_POINTER }},
|
|
};*/
|
|
static gint *ett[] = {
|
|
&ett_cltp,
|
|
};
|
|
|
|
proto_cltp = proto_register_protocol(PROTO_STRING_CLTP, "cltp");
|
|
/* proto_register_field_array(proto_cotp, hf, array_length(hf));*/
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
}
|
|
|
|
void
|
|
proto_reg_handoff_clnp(void)
|
|
{
|
|
old_dissector_add("osinl", NLPID_ISO8473_CLNP, dissect_clnp);
|
|
old_dissector_add("osinl", NLPID_NULL, dissect_clnp); /* Inactive subset */
|
|
}
|