forked from osmocom/wireshark
308 lines
7.8 KiB
C
308 lines
7.8 KiB
C
/* packet-pn.c
|
|
* Common functions for other PROFINET protocols like IO, CBA, DCP, ...
|
|
*
|
|
* $Id$
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include "config.h"
|
|
#endif
|
|
|
|
#include <string.h>
|
|
|
|
#include <glib.h>
|
|
#include <epan/packet.h>
|
|
#include <epan/dissectors/packet-dcerpc.h>
|
|
#include <epan/expert.h>
|
|
|
|
#include "packet-pn.h"
|
|
|
|
|
|
|
|
static int hf_pn_padding = -1;
|
|
static int hf_pn_undecoded_data = -1;
|
|
static int hf_pn_user_data = -1;
|
|
static int hf_pn_user_bytes = -1;
|
|
static int hf_pn_malformed = -1;
|
|
|
|
|
|
|
|
/* dissect an 8 bit unsigned integer */
|
|
int
|
|
dissect_pn_uint8(tvbuff_t *tvb, gint offset, packet_info *pinfo _U_,
|
|
proto_tree *tree, int hfindex, guint8 *pdata)
|
|
{
|
|
guint8 data;
|
|
|
|
data = tvb_get_guint8 (tvb, offset);
|
|
if (tree) {
|
|
proto_tree_add_uint(tree, hfindex, tvb, offset, 1, data);
|
|
}
|
|
if (pdata)
|
|
*pdata = data;
|
|
return offset + 1;
|
|
}
|
|
|
|
/* dissect a 16 bit unsigned integer */
|
|
int
|
|
dissect_pn_uint16(tvbuff_t *tvb, gint offset, packet_info *pinfo _U_,
|
|
proto_tree *tree, int hfindex, guint16 *pdata)
|
|
{
|
|
guint16 data;
|
|
|
|
data = tvb_get_ntohs (tvb, offset);
|
|
|
|
if (tree) {
|
|
proto_tree_add_uint(tree, hfindex, tvb, offset, 2, data);
|
|
}
|
|
if (pdata)
|
|
*pdata = data;
|
|
return offset + 2;
|
|
}
|
|
|
|
/* dissect a 32 bit unsigned integer */
|
|
int
|
|
dissect_pn_uint32(tvbuff_t *tvb, gint offset, packet_info *pinfo _U_,
|
|
proto_tree *tree, int hfindex, guint32 *pdata)
|
|
{
|
|
guint32 data;
|
|
|
|
data = tvb_get_ntohl (tvb, offset);
|
|
|
|
if (tree) {
|
|
proto_tree_add_uint(tree, hfindex, tvb, offset, 4, data);
|
|
}
|
|
if (pdata)
|
|
*pdata = data;
|
|
return offset+4;
|
|
}
|
|
|
|
/* dissect a 16 bit signed integer */
|
|
int
|
|
dissect_pn_int16(tvbuff_t *tvb, gint offset, packet_info *pinfo _U_,
|
|
proto_tree *tree, int hfindex, gint16 *pdata)
|
|
{
|
|
gint16 data;
|
|
|
|
data = tvb_get_ntohs (tvb, offset);
|
|
|
|
if (tree) {
|
|
proto_tree_add_int(tree, hfindex, tvb, offset, 2, data);
|
|
}
|
|
if (pdata)
|
|
*pdata = data;
|
|
return offset + 2;
|
|
}
|
|
|
|
/* dissect a 32 bit signed integer */
|
|
int
|
|
dissect_pn_int32(tvbuff_t *tvb, gint offset, packet_info *pinfo _U_,
|
|
proto_tree *tree, int hfindex, gint32 *pdata)
|
|
{
|
|
gint32 data;
|
|
|
|
data = tvb_get_ntohl (tvb, offset);
|
|
|
|
if (tree) {
|
|
proto_tree_add_int(tree, hfindex, tvb, offset, 4, data);
|
|
}
|
|
if (pdata)
|
|
*pdata = data;
|
|
return offset + 4;
|
|
}
|
|
|
|
/* dissect a 24bit OUI (IEC organizational unique id) */
|
|
int
|
|
dissect_pn_oid(tvbuff_t *tvb, int offset, packet_info *pinfo _U_,
|
|
proto_tree *tree, int hfindex, guint32 *pdata)
|
|
{
|
|
guint32 data;
|
|
|
|
data = tvb_get_ntoh24(tvb, offset);
|
|
|
|
if (tree) {
|
|
proto_tree_add_uint(tree, hfindex, tvb, offset, 3, data);
|
|
}
|
|
if (pdata)
|
|
*pdata = data;
|
|
return offset+3;
|
|
}
|
|
|
|
/* dissect a 6 byte MAC address */
|
|
int
|
|
dissect_pn_mac(tvbuff_t *tvb, int offset, packet_info *pinfo _U_,
|
|
proto_tree *tree, int hfindex, guint8 *pdata)
|
|
{
|
|
guint8 data[6];
|
|
|
|
tvb_memcpy(tvb, data, offset, 6);
|
|
if(tree)
|
|
proto_tree_add_ether(tree, hfindex, tvb, offset, 6, data);
|
|
|
|
if (pdata)
|
|
memcpy(pdata, data, 6);
|
|
|
|
return offset + 6;
|
|
}
|
|
|
|
/* dissect an IPv4 address */
|
|
int
|
|
dissect_pn_ipv4(tvbuff_t *tvb, int offset, packet_info *pinfo _U_,
|
|
proto_tree *tree, int hfindex, guint32 *pdata)
|
|
{
|
|
guint32 data;
|
|
|
|
data = tvb_get_ipv4(tvb, offset);
|
|
if(tree)
|
|
proto_tree_add_ipv4(tree, hfindex, tvb, offset, 4, data);
|
|
|
|
if (pdata)
|
|
*pdata = data;
|
|
|
|
return offset + 4;
|
|
}
|
|
|
|
/* dissect a 16 byte UUID address */
|
|
int
|
|
dissect_pn_uuid(tvbuff_t *tvb, int offset, packet_info *pinfo _U_,
|
|
proto_tree *tree, int hfindex, e_uuid_t *uuid)
|
|
{
|
|
guint8 drep[2] = { 0,0 };
|
|
|
|
offset = dissect_dcerpc_uuid_t(tvb, offset, pinfo, tree, drep,
|
|
hfindex, uuid);
|
|
|
|
return offset;
|
|
}
|
|
|
|
/* "dissect" some bytes still undecoded (with Expert warning) */
|
|
int
|
|
dissect_pn_undecoded(tvbuff_t *tvb, int offset, packet_info *pinfo _U_,
|
|
proto_tree *tree, guint32 length)
|
|
{
|
|
proto_item *item;
|
|
|
|
|
|
item = proto_tree_add_string_format(tree, hf_pn_undecoded_data, tvb, offset, length, "data",
|
|
"Undecoded Data: %d bytes", length);
|
|
|
|
expert_add_info_format(pinfo, item, PI_UNDECODED, PI_WARN,
|
|
"Undecoded Data, %u bytes", length);
|
|
|
|
return offset + length;
|
|
}
|
|
|
|
/* "dissect" some user bytes */
|
|
int
|
|
dissect_pn_user_data_bytes(tvbuff_t *tvb, int offset, packet_info *pinfo _U_,
|
|
proto_tree *tree, guint32 length, const char *text _U_)
|
|
{
|
|
proto_tree_add_bytes(tree, hf_pn_user_bytes, tvb, offset, length, tvb_get_ptr(tvb,offset, length));
|
|
|
|
return offset + length;
|
|
}
|
|
|
|
int
|
|
dissect_pn_user_data(tvbuff_t *tvb, int offset, packet_info *pinfo _U_,
|
|
proto_tree *tree, guint32 length, const char *text)
|
|
{
|
|
proto_tree_add_string_format(tree, hf_pn_user_data, tvb, offset, length, "data",
|
|
"%s: %d bytes", text, length);
|
|
|
|
return offset + length;
|
|
}
|
|
|
|
/* packet is malformed, mark it as such */
|
|
int
|
|
dissect_pn_malformed(tvbuff_t *tvb, int offset, packet_info *pinfo _U_,
|
|
proto_tree *tree, guint32 length)
|
|
{
|
|
proto_tree_add_item(tree, hf_pn_malformed, tvb, 0, 10000, ENC_NA);
|
|
|
|
return offset + length;
|
|
}
|
|
|
|
|
|
/* dissect some padding data (with the given length) */
|
|
int
|
|
dissect_pn_padding(tvbuff_t *tvb, int offset, packet_info *pinfo _U_,
|
|
proto_tree *tree, int length)
|
|
{
|
|
proto_tree_add_string_format(tree, hf_pn_padding, tvb, offset, length, "data",
|
|
"Padding: %u byte", length);
|
|
|
|
return offset + length;
|
|
}
|
|
|
|
/* align offset to 4 */
|
|
int
|
|
dissect_pn_align4(tvbuff_t *tvb, int offset, packet_info *pinfo _U_, proto_tree *tree)
|
|
{
|
|
guint padding = 0;
|
|
|
|
|
|
if (offset % 4) {
|
|
padding = 4 - (offset % 4);
|
|
|
|
proto_tree_add_string_format(tree, hf_pn_padding, tvb, offset, padding, "data",
|
|
"Padding: %u byte", padding);
|
|
}
|
|
|
|
return offset + padding;
|
|
}
|
|
|
|
/* append the given info text to item and column */
|
|
void
|
|
pn_append_info(packet_info *pinfo, proto_item *dcp_item, const char *text)
|
|
{
|
|
col_append_str(pinfo->cinfo, COL_INFO, text);
|
|
|
|
proto_item_append_text(dcp_item, "%s", text);
|
|
}
|
|
|
|
|
|
|
|
void
|
|
init_pn (int proto)
|
|
{
|
|
static hf_register_info hf[] = {
|
|
{ &hf_pn_padding,
|
|
{ "Padding", "pn.padding", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_pn_undecoded_data,
|
|
{ "Undecoded Data", "pn.undecoded", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_pn_user_data,
|
|
{ "User Data", "pn.user_data", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_pn_user_bytes,
|
|
{ "Substitute Data", "pn.user_bytes", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_pn_malformed,
|
|
{ "Malformed", "pn_rt.malformed", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }}
|
|
};
|
|
|
|
|
|
/*static gint *ett[] = {
|
|
};*/
|
|
|
|
proto_register_field_array (proto, hf, array_length (hf));
|
|
/*proto_register_subtree_array (ett, array_length (ett));*/
|
|
}
|
|
|