forked from osmocom/wireshark
ad6134bb4b
Change-Id: I78f9815616f4fc3c14204339c5826f0ca7d0680e Reviewed-on: https://code.wireshark.org/review/4485 Reviewed-by: Bill Meier <wmeier@newsguy.com>
283 lines
8.7 KiB
C
283 lines
8.7 KiB
C
/* packet-vendor.c
|
|
* Routines for Vendor Specific Encodings dissection
|
|
* Copyright 2002, Anand V. Narwani <anand[AT]narwani.org>
|
|
*
|
|
* Wireshark - Network traffic analyzer
|
|
* By Gerald Combs <gerald@wireshark.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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
*/
|
|
|
|
|
|
/* Notes to Adding dissectors for Vendor specific TLV's:
|
|
* 1. Create a dissect_<vendorname> function with the following prototype:
|
|
* dissect_foovendor(tvbuff_t *tvb, proto_tree *tree, gint vsif_len)
|
|
* 2. vsif_len will be the *entire* length of the vsif TLV (including the
|
|
* Vendor Id TLV, which is 5 bytes long).
|
|
* 3. Create a new 'case' statement in dissect_vsif, for your specific Vendor
|
|
* id.
|
|
* 4. In that 'case' statement you will make the following calls:
|
|
* (assume for this example that your vendor id is 0x000054)
|
|
* #define VENDOR_FOOVENDOR 0x00054
|
|
* case VENDOR_FOOVENDOR:
|
|
* proto_item_append_text (it, " (foo vendor)");
|
|
* dissect_foovendor (tvb, vsif_tree, vsif_len);
|
|
* break;
|
|
* 5. Please see dissect_cisco for an example of how to do this.
|
|
*/
|
|
|
|
#include "config.h"
|
|
|
|
#include <epan/packet.h>
|
|
#include <epan/exceptions.h>
|
|
|
|
/* Define Vendor ID's here */
|
|
#define VENDOR_CISCO 0x00000C
|
|
|
|
void proto_register_docsis_vsif(void);
|
|
void proto_reg_handoff_docsis_vsif(void);
|
|
|
|
/* Initialize the protocol and registered fields */
|
|
static int proto_docsis_vsif = -1;
|
|
static int hf_docsis_vsif_vendorid = -1;
|
|
static int hf_docsis_vsif_vendor_unknown = -1;
|
|
static int hf_docsis_vsif_cisco_numphones = -1;
|
|
/* static int hf_docsis_vsif_cisco_ipprec = -1; */
|
|
static int hf_docsis_vsif_cisco_ipprec_val = -1;
|
|
static int hf_docsis_vsif_cisco_ipprec_bw = -1;
|
|
static int hf_docsis_vsif_cisco_config_file = -1;
|
|
|
|
/* Initialize the subtree pointers */
|
|
static gint ett_docsis_vsif = -1;
|
|
static gint ett_docsis_vsif_ipprec = -1;
|
|
|
|
static const value_string vendorid_vals[] = {
|
|
{VENDOR_CISCO, "Cisco Systems, Inc."},
|
|
{0, NULL},
|
|
};
|
|
|
|
/* Forward Declarations for vendor specific dissectors */
|
|
static void dissect_cisco (tvbuff_t * tvb, proto_tree * tree,
|
|
gint vsif_len);
|
|
|
|
/* Dissection */
|
|
static void
|
|
dissect_vsif (tvbuff_t * tvb, packet_info * pinfo _U_, proto_tree * tree)
|
|
{
|
|
proto_item *it;
|
|
proto_tree *vsif_tree;
|
|
guint8 type;
|
|
guint8 length;
|
|
guint32 value;
|
|
gint vsif_len;
|
|
|
|
/* get the reported length of the VSIF TLV */
|
|
vsif_len = tvb_reported_length_remaining (tvb, 0);
|
|
|
|
/* The first TLV in the VSIF encodings must be type 0x08 (Vendor ID) and
|
|
* length 3.
|
|
*/
|
|
type = tvb_get_guint8 (tvb, 0);
|
|
if (type != 0x08)
|
|
{
|
|
THROW (ReportedBoundsError);
|
|
}
|
|
|
|
length = tvb_get_guint8 (tvb, 1);
|
|
if (length != 3)
|
|
{
|
|
THROW (ReportedBoundsError);
|
|
}
|
|
|
|
/* Extract the Value of the Vendor ID */
|
|
value = tvb_get_ntoh24 (tvb, 2);
|
|
if (tree)
|
|
{
|
|
it =
|
|
proto_tree_add_protocol_format (tree, proto_docsis_vsif, tvb, 0, -1,
|
|
"VSIF Encodings");
|
|
vsif_tree = proto_item_add_subtree (it, ett_docsis_vsif);
|
|
proto_tree_add_item (vsif_tree, hf_docsis_vsif_vendorid, tvb, 2, 3, ENC_BIG_ENDIAN);
|
|
|
|
/* switch on the Vendor ID */
|
|
switch (value)
|
|
{
|
|
case VENDOR_CISCO:
|
|
proto_item_append_text (it, " (Cisco)");
|
|
dissect_cisco (tvb, vsif_tree, vsif_len);
|
|
break;
|
|
default:
|
|
proto_item_append_text (it, " (Unknown)");
|
|
proto_tree_add_item (vsif_tree, hf_docsis_vsif_vendor_unknown, tvb,
|
|
0, -1, ENC_NA);
|
|
break;
|
|
}
|
|
|
|
} /* if(tree) */
|
|
|
|
|
|
}
|
|
|
|
/* Dissector for Cisco Vendor Specific TLV's */
|
|
|
|
#define NUM_PHONES 0x0a
|
|
#define IOS_CONFIG_FILE 0x80
|
|
#define IP_PREC 0x0b
|
|
#define IP_PREC_VAL 0x01
|
|
#define IP_PREC_BW 0x02
|
|
|
|
static void
|
|
dissect_cisco (tvbuff_t * tvb, proto_tree * tree, gint vsif_len)
|
|
{
|
|
/* Start at pos = 5, since tvb includes the Vendor ID field */
|
|
int pos = 5;
|
|
guint8 type, length;
|
|
proto_tree *ipprec_tree;
|
|
int templen;
|
|
|
|
while (pos < vsif_len)
|
|
{
|
|
/* Extract the type and length Fields from the TLV */
|
|
type = tvb_get_guint8 (tvb, pos++);
|
|
length = tvb_get_guint8 (tvb, pos++);
|
|
switch (type)
|
|
{
|
|
case NUM_PHONES:
|
|
proto_tree_add_item (tree, hf_docsis_vsif_cisco_numphones, tvb,
|
|
pos, length, ENC_BIG_ENDIAN);
|
|
break;
|
|
case IP_PREC:
|
|
ipprec_tree =
|
|
proto_tree_add_subtree(tree, tvb, pos, length, ett_docsis_vsif_ipprec, NULL, "IP Precedence");
|
|
/* Handle Sub-TLVs in IP Precedence */
|
|
templen = pos + length;
|
|
while (pos < templen)
|
|
{
|
|
type = tvb_get_guint8 (tvb, pos++);
|
|
length = tvb_get_guint8 (tvb, pos++);
|
|
switch (type)
|
|
{
|
|
case IP_PREC_VAL:
|
|
if (length != 1)
|
|
THROW (ReportedBoundsError);
|
|
proto_tree_add_item (ipprec_tree,
|
|
hf_docsis_vsif_cisco_ipprec_val, tvb,
|
|
pos, length, ENC_BIG_ENDIAN);
|
|
break;
|
|
case IP_PREC_BW:
|
|
if (length != 4)
|
|
THROW (ReportedBoundsError);
|
|
proto_tree_add_item (ipprec_tree,
|
|
hf_docsis_vsif_cisco_ipprec_bw, tvb,
|
|
pos, length, ENC_BIG_ENDIAN);
|
|
break;
|
|
default:
|
|
THROW (ReportedBoundsError);
|
|
}
|
|
pos += length;
|
|
}
|
|
break;
|
|
case IOS_CONFIG_FILE:
|
|
proto_tree_add_item (tree, hf_docsis_vsif_cisco_config_file, tvb,
|
|
pos, length, ENC_ASCII|ENC_NA);
|
|
}
|
|
pos += length;
|
|
}
|
|
}
|
|
|
|
/* Register the protocol with Wireshark */
|
|
void
|
|
proto_register_docsis_vsif (void)
|
|
{
|
|
static hf_register_info hf[] = {
|
|
{&hf_docsis_vsif_vendorid,
|
|
{"Vendor Id", "docsis_vsif.vendorid",
|
|
FT_UINT24, BASE_HEX, VALS(vendorid_vals), 0x0,
|
|
"Vendor Identifier", HFILL}
|
|
},
|
|
{&hf_docsis_vsif_vendor_unknown,
|
|
{"VSIF Encodings", "docsis_vsif.unknown",
|
|
FT_BYTES, BASE_NONE, NULL, 0x0,
|
|
"Unknown Vendor", HFILL}
|
|
},
|
|
{&hf_docsis_vsif_cisco_numphones,
|
|
{"Number of phone lines", "docsis_vsif.cisco.numphones",
|
|
FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL}
|
|
},
|
|
#if 0
|
|
{&hf_docsis_vsif_cisco_ipprec,
|
|
{"IP Precedence Encodings", "docsis_vsif.cisco.ipprec",
|
|
FT_BYTES, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL}
|
|
},
|
|
#endif
|
|
{&hf_docsis_vsif_cisco_ipprec_val,
|
|
{"IP Precedence Value", "docsis_vsif.cisco.ipprec.value",
|
|
FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL}
|
|
},
|
|
{&hf_docsis_vsif_cisco_ipprec_bw,
|
|
{"IP Precedence Bandwidth", "docsis_vsif.cisco.ipprec.bw",
|
|
FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL}
|
|
},
|
|
{&hf_docsis_vsif_cisco_config_file,
|
|
{"IOS Config File", "docsis_vsif.cisco.iosfile",
|
|
FT_STRING, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL}
|
|
},
|
|
};
|
|
|
|
static gint *ett[] = {
|
|
&ett_docsis_vsif,
|
|
&ett_docsis_vsif_ipprec,
|
|
};
|
|
|
|
proto_docsis_vsif =
|
|
proto_register_protocol ("DOCSIS Vendor Specific Encodings",
|
|
"DOCSIS VSIF", "docsis_vsif");
|
|
|
|
proto_register_field_array (proto_docsis_vsif, hf, array_length (hf));
|
|
proto_register_subtree_array (ett, array_length (ett));
|
|
|
|
register_dissector ("docsis_vsif", dissect_vsif, proto_docsis_vsif);
|
|
}
|
|
|
|
void
|
|
proto_reg_handoff_docsis_vsif (void)
|
|
{
|
|
#if 0
|
|
dissector_handle_t docsis_vsif_handle;
|
|
|
|
docsis_vsif_handle = find_dissector ("docsis_vsif");
|
|
dissector_add_uint ("docsis", 0xFD, docsis_vsif_handle);
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* Editor modelines - http://www.wireshark.org/tools/modelines.html
|
|
*
|
|
* Local Variables:
|
|
* c-basic-offset: 2
|
|
* tab-width: 8
|
|
* indent-tabs-mode: nil
|
|
* End:
|
|
*
|
|
* ex: set shiftwidth=2 tabstop=8 expandtab:
|
|
* :indentSize=2:tabSize=8:noTabs=true:
|
|
*/
|