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wireshark/epan/dissectors/packet-hpsw.c
Michael Mann f4b0abc729 Dissectors don't need a journey of self discovery. 
They already know who they are when they register themselves.  Saving the
handle then to avoid finding it later.
Not sure if this will increase unnecessary register_dissector functions
(instead of using create_dissector_handle in proto_reg_handoff function)
when other dissectors copy/paste, but it should make startup time
a few microseconds better.

Change-Id: I3839be791b32b84887ac51a6a65fb5733e9f1f43
Reviewed-on: https://code.wireshark.org/review/19481
Petri-Dish: Michael Mann <mmann78@netscape.net>
Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org>
Reviewed-by: Anders Broman <a.broman58@gmail.com>
2016-12-31 07:31:42 +00:00

385 lines
13 KiB
C
Raw Blame History

/* packet-hpsw.c
* Routines for HP Switch Config protocol
* Charlie Lenahan <clenahan@fortresstech.com>
*
* 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.
*/
#include "config.h"
#include <epan/packet.h>
#include <epan/expert.h>
#include "packet-hpext.h"
void proto_register_hpsw(void);
void proto_reg_handoff_hpsw(void);
static int proto_hpsw = -1;
static int hf_hpsw_version = -1;
static int hf_hpsw_type = -1;
static int hf_hpsw_tlvtype = -1;
static int hf_hpsw_tlvlength = -1;
static int hf_hpsw_field_10 = -1;
static int hf_hpsw_own_mac_addr = -1;
static int hf_hpsw_neighbor_mac_addr = -1;
static int hf_hpsw_field_6 = -1;
static int hf_hpsw_field_9 = -1;
static int hf_hpsw_device_version = -1;
static int hf_hpsw_device_name = -1;
static int hf_hpsw_ip_addr = -1;
static int hf_hpsw_field_8 = -1;
static int hf_hpsw_domain = -1;
static int hf_hpsw_field_12 = -1;
static int hf_hpsw_config_name = -1;
static int hf_hpsw_root_mac_addr = -1;
static int hf_hpsw_device_id = -1;
static int hf_hpsw_device_id_data = -1;
static int hf_hpsw_data = -1;
static gint ett_hpsw = -1;
static gint ett_hpsw_tlv = -1;
static expert_field ei_hpsw_tlvlength_bad = EI_INIT;
static dissector_handle_t hpsw_handle;
#define HPFOO_DEVICE_NAME 0x1
#define HPFOO_DEVICE_VERSION 0x2
#define HPFOO_CONFIG_NAME 0x3
#define HPFOO_ROOT_MAC_ADDR 0x4
#define HPFOO_IP_ADDR 0x5
#define HPFOO_FIELD_6 0x6
#define HPFOO_DOMAIN 0x7
#define HPFOO_FIELD_8 0x8
#define HPFOO_FIELD_9 0x9
#define HPFOO_FIELD_10 0xa
#define HPFOO_NEIGHBORS 0xb
#define HPFOO_FIELD_12 0xc
#define HPFOO_DEVICE_ID 0xd
#define HPFOO_OWN_MAC_ADDR 0xe
static const value_string hpsw_tlv_type_vals[] = {
{ HPFOO_DEVICE_NAME, "Device Name" },
{ HPFOO_DEVICE_VERSION, "Version" },
{ HPFOO_CONFIG_NAME, "Config Name" },
{ HPFOO_ROOT_MAC_ADDR, "Root MAC Addr" },
{ HPFOO_IP_ADDR, "IP Addr" },
{ HPFOO_FIELD_6, "Field 6" },
{ HPFOO_DOMAIN, "Domain" },
{ HPFOO_FIELD_8, "Field 8" },
{ HPFOO_FIELD_9, "Field 9" },
{ HPFOO_FIELD_10, "Field 10" },
{ HPFOO_NEIGHBORS, "Neighbors" },
{ HPFOO_FIELD_12, "Field 12" },
{ HPFOO_DEVICE_ID, "Device ID" },
{ HPFOO_OWN_MAC_ADDR, "2nd MAC Addr" },
{ 0x00, NULL }
};
static void
dissect_hpsw_tlv(tvbuff_t *tvb, packet_info *pinfo, int offset, int length,
proto_tree *tree, proto_item *ti, guint8 type)
{
switch (type) {
case HPFOO_DEVICE_NAME:
if (length > 0) {
proto_tree_add_item(tree, hf_hpsw_device_name, tvb, offset, length, ENC_NA|ENC_ASCII);
} else {
expert_add_info_format(pinfo, ti, &ei_hpsw_tlvlength_bad, "Device Name: Bad length %u", length);
}
break;
case HPFOO_DEVICE_VERSION:
if (length > 0) {
proto_tree_add_item(tree, hf_hpsw_device_version, tvb, offset, length, ENC_NA|ENC_ASCII);
} else {
expert_add_info_format(pinfo, ti, &ei_hpsw_tlvlength_bad, "Version: Bad length %u", length);
}
break;
case HPFOO_CONFIG_NAME:
if (length > 0) {
proto_tree_add_item(tree, hf_hpsw_config_name, tvb, offset, length, ENC_NA|ENC_ASCII);
} else {
expert_add_info_format(pinfo, ti, &ei_hpsw_tlvlength_bad, "Config Name: Bad length %u", length);
}
break;
case HPFOO_ROOT_MAC_ADDR:
if (length == 6) {
proto_tree_add_item(tree, hf_hpsw_root_mac_addr, tvb, offset, length, ENC_NA);
} else {
expert_add_info_format(pinfo, ti, &ei_hpsw_tlvlength_bad, "Root MAC Addr: Bad length %u", length);
}
break;
case HPFOO_IP_ADDR:
if (length == 4) {
proto_tree_add_item(tree, hf_hpsw_ip_addr, tvb, offset, length, ENC_BIG_ENDIAN);
} else {
expert_add_info_format(pinfo, ti, &ei_hpsw_tlvlength_bad, "IP Addr: Bad length %u", length);
}
break;
case HPFOO_FIELD_6:
if (length == 2) {
proto_tree_add_item(tree, hf_hpsw_field_6, tvb, offset, length, ENC_BIG_ENDIAN);
} else {
expert_add_info_format(pinfo, ti, &ei_hpsw_tlvlength_bad, "Field 6: Bad length %u", length);
}
break;
case HPFOO_DOMAIN:
if (length > 0) {
proto_tree_add_item(tree, hf_hpsw_domain, tvb, offset, length, ENC_NA|ENC_ASCII);
} else {
expert_add_info_format(pinfo, ti, &ei_hpsw_tlvlength_bad, "Domain: Bad length %u", length);
}
break;
case HPFOO_FIELD_8:
if (length == 2) {
proto_tree_add_item(tree, hf_hpsw_field_8, tvb, offset, length, ENC_BIG_ENDIAN);
} else {
expert_add_info_format(pinfo, ti, &ei_hpsw_tlvlength_bad, "Field 8: Bad length %u", length);
}
break;
case HPFOO_FIELD_9:
if (length == 2) {
proto_tree_add_item(tree, hf_hpsw_field_9, tvb, offset, length, ENC_BIG_ENDIAN);
} else {
expert_add_info_format(pinfo, ti, &ei_hpsw_tlvlength_bad, "Field 9: Bad length %u", length);
}
break;
case HPFOO_FIELD_10:
if (length == 4) {
proto_tree_add_item(tree, hf_hpsw_field_10, tvb, offset, length, ENC_BIG_ENDIAN);
} else {
expert_add_info_format(pinfo, ti, &ei_hpsw_tlvlength_bad, "Field 10: Bad length %u", length);
}
break;
case HPFOO_NEIGHBORS:
if (!(length % 6))
{ int i = length/6;
proto_item_set_text(proto_tree_get_parent(tree), "Number of neighbor MAC Addresses: %u", i);
for ( ; i; i--)
{
proto_tree_add_item(tree, hf_hpsw_neighbor_mac_addr, tvb, offset, 6, ENC_NA);
offset += 6;
}
} else {
expert_add_info_format(pinfo, ti, &ei_hpsw_tlvlength_bad, "Neighbors: Bad length %u", length);
}
break;
case HPFOO_FIELD_12:
if (length == 1) {
proto_tree_add_item(tree, hf_hpsw_field_12, tvb, offset, length, ENC_BIG_ENDIAN);
} else {
expert_add_info_format(pinfo, ti, &ei_hpsw_tlvlength_bad, "Field 12: Bad length %u", length);
}
break;
case HPFOO_DEVICE_ID:
if (length > 6) {
proto_tree_add_item(tree, hf_hpsw_device_id, tvb, offset, 6, ENC_NA);
proto_tree_add_item(tree, hf_hpsw_device_id_data, tvb, offset+6, length-6, ENC_NA);
} else {
expert_add_info_format(pinfo, ti, &ei_hpsw_tlvlength_bad, "Device ID: Bad length %u", length);
}
break;
case HPFOO_OWN_MAC_ADDR:
if (length == 6) {
proto_tree_add_item(tree, hf_hpsw_own_mac_addr, tvb, offset, length, ENC_NA);
} else {
expert_add_info_format(pinfo, ti, &ei_hpsw_tlvlength_bad, "Own MAC Addr: Bad length %u", length);
}
break;
default:
proto_tree_add_item(tree, hf_hpsw_data, tvb, offset, length, ENC_NA);
break;
}
}
static int
dissect_hpsw(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
{
proto_tree *hp_tree;
proto_tree *tlv_tree;
proto_item *ti;
guint8 version;
gint offset = 0;
col_set_str(pinfo->cinfo, COL_PROTOCOL, "HP");
col_set_str(pinfo->cinfo, COL_INFO, "HP Switch Protocol");
version = tvb_get_guint8(tvb, 0);
ti = proto_tree_add_item(tree, proto_hpsw, tvb, 0, -1, ENC_NA);
hp_tree = proto_item_add_subtree(ti, ett_hpsw);
proto_tree_add_uint(hp_tree, hf_hpsw_version, tvb, 0, 1, version);
offset += 1;
proto_tree_add_item(hp_tree, hf_hpsw_type, tvb, 1, 1, ENC_BIG_ENDIAN);
offset += 1;
while ( tvb_reported_length_remaining(tvb, offset) > 0 )
{
guint8 type, length;
type = tvb_get_guint8(tvb, offset);
length = tvb_get_guint8(tvb, offset+1);
/* make sure still in valid tlv */
if (( length < 1 ) || ( length > tvb_reported_length_remaining(tvb, offset+2)))
break;
tlv_tree = proto_tree_add_subtree(hp_tree, tvb, offset, length+2, ett_hpsw_tlv, NULL,
val_to_str(type, hpsw_tlv_type_vals, "Unknown TLV type: 0x%02x"));
/* type */
proto_tree_add_uint(tlv_tree, hf_hpsw_tlvtype, tvb, offset, 1, type);
offset += 1;
/* LENGTH (not inclusive of type and length bytes) */
ti = proto_tree_add_uint(tlv_tree, hf_hpsw_tlvlength, tvb, offset, 1, length);
offset += 1;
dissect_hpsw_tlv(tvb, pinfo, offset, length, tlv_tree, ti, type);
offset += length;
}
return tvb_captured_length(tvb);
}
void
proto_register_hpsw(void)
{
static hf_register_info hf[] = {
{ &hf_hpsw_version,
{ "Version", "hpsw.version", FT_UINT8, BASE_HEX,
NULL, 0x0, NULL, HFILL }},
{ &hf_hpsw_type,
{ "Type", "hpsw.type", FT_UINT8, BASE_HEX,
NULL, 0x0, NULL, HFILL }},
{ &hf_hpsw_tlvtype,
{ "Type", "hpsw.tlv_type", FT_UINT8, BASE_HEX,
VALS(hpsw_tlv_type_vals), 0x0, NULL, HFILL }},
{ &hf_hpsw_tlvlength,
{ "Length", "hpsw.tlv_len", FT_UINT8, BASE_DEC,
NULL, 0x0, NULL, HFILL }},
{ &hf_hpsw_device_name,
{ "Device Name", "hpsw.device_name", FT_STRING, BASE_NONE,
NULL, 0x0, NULL, HFILL }},
{ &hf_hpsw_device_version,
{ "Version", "hpsw.device_version", FT_STRING, BASE_NONE,
NULL, 0x0, NULL, HFILL }},
{ &hf_hpsw_config_name,
{ "Config Name", "hpsw.config_name", FT_STRING, BASE_NONE,
NULL, 0x0, NULL, HFILL }},
{ &hf_hpsw_root_mac_addr,
{ "Root MAC Addr", "hpsw.root_mac_addr", FT_ETHER, BASE_NONE,
NULL, 0x0, NULL, HFILL }},
{ &hf_hpsw_ip_addr,
{ "IP Addr", "hpsw.ip_addr", FT_IPv4, BASE_NONE,
NULL, 0x0, NULL, HFILL }},
{ &hf_hpsw_field_6,
{ "Field 6", "hpsw.field_6", FT_UINT16, BASE_HEX,
NULL, 0x0, NULL, HFILL }},
{ &hf_hpsw_domain,
{ "Domain", "hpsw.domain", FT_STRING, BASE_NONE,
NULL, 0x0, NULL, HFILL }},
{ &hf_hpsw_field_8,
{ "Field 8", "hpsw.field_8", FT_UINT16, BASE_HEX,
NULL, 0x0, NULL, HFILL }},
{ &hf_hpsw_field_9,
{ "Field 9", "hpsw.field_9", FT_UINT16, BASE_HEX,
NULL, 0x0, NULL, HFILL }},
{ &hf_hpsw_field_10,
{ "Field 10", "hpsw.field_10", FT_UINT32, BASE_HEX,
NULL, 0x0, NULL, HFILL }},
{ &hf_hpsw_neighbor_mac_addr,
{ "MAC Addr", "hpsw.neighbor_mac_addr", FT_ETHER, BASE_NONE,
NULL, 0x0, NULL, HFILL }},
{ &hf_hpsw_field_12,
{ "Field 12", "hpsw.field_12", FT_UINT8, BASE_HEX,
NULL, 0x0, NULL, HFILL }},
{ &hf_hpsw_own_mac_addr,
{ "Own MAC Addr", "hpsw.own_mac_addr", FT_ETHER, BASE_NONE,
NULL, 0x0, NULL, HFILL }},
{ &hf_hpsw_device_id,
{ "Device ID", "hpsw.device_id", FT_ETHER, BASE_NONE,
NULL, 0x0, NULL, HFILL }},
{ &hf_hpsw_device_id_data,
{ "Data", "hpsw.device_id_data", FT_BYTES, BASE_NONE,
NULL, 0x0, NULL, HFILL }},
{ &hf_hpsw_data,
{ "Data", "hpsw.data", FT_BYTES, BASE_NONE,
NULL, 0x0, NULL, HFILL }},
};
static gint *ett[] = {
&ett_hpsw,
&ett_hpsw_tlv
};
static ei_register_info ei[] = {
{ &ei_hpsw_tlvlength_bad, { "hpsw.tlv_len.bad", PI_PROTOCOL, PI_WARN, "Bad length", EXPFILL }},
};
expert_module_t* expert_hpsw;
proto_hpsw = proto_register_protocol( "HP Switch Protocol", "HPSW", "hpsw");
proto_register_field_array(proto_hpsw, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
expert_hpsw = expert_register_protocol(proto_hpsw);
expert_register_field_array(expert_hpsw, ei, array_length(ei));
hpsw_handle = register_dissector("hpsw", dissect_hpsw, proto_hpsw);
}
void
proto_reg_handoff_hpsw(void)
{
dissector_add_uint("hpext.dxsap", HPEXT_HPSW, hpsw_handle);
}
/*
* Editor modelines
*
* Local Variables:
* c-basic-offset: 4
* tab-width: 8
* indent-tabs-mode: nil
* End:
*
* ex: set shiftwidth=4 tabstop=8 expandtab:
* :indentSize=4:tabSize=8:noTabs=true:
*/
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