![Pascal Quantin](/assets/img/avatar_default.png)
- ep_tvb_get_bits() -> wmem_packet_tvb_get_bits() - tvb_g_memdup()/ep_tvb_memdup() -> tvb_memdup() - tvb_fake_unicode()/tvb_get_ephemeral_faked_unicode() -> tvb_get_faked_unicode() - tvb_get_g_string()/tvb_get_ephemeral_string()/tvb_get_seasonal_string() -> tvb_get_string() - tvb_get_g_unicode_string()/tvb_get_ephemeral_unicode_string() -> tvb_get_unicode_string() - tvb_get_ephemeral_string_enc() -> tvb_get_string_enc() - update docs accordingly svn path=/trunk/; revision=52172
468 lines
13 KiB
C
468 lines
13 KiB
C
/* packet-foundry.c
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* Routines for the disassembly of Foundry LLC messages (currently
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* Foundry Discovery Protocol - FDP only)
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*
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* $Id$
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*
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* Copyright 2012 Joerg Mayer (see AUTHORS file)
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1998 Gerald Combs
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "config.h"
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#include <glib.h>
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#include <epan/packet.h>
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#include <epan/strutil.h>
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#include <epan/in_cksum.h>
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#include "packet-llc.h"
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#include <epan/oui.h>
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static int hf_llc_foundry_pid = -1;
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static int proto_fdp = -1;
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/* FDP header */
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static int hf_fdp_version = -1;
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static int hf_fdp_holdtime = -1;
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static int hf_fdp_checksum = -1;
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/* TLV header */
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static int hf_fdp_tlv_type = -1;
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static int hf_fdp_tlv_length = -1;
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/* Unknown element */
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static int hf_fdp_unknown = -1;
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static int hf_fdp_unknown_data = -1;
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/* Port Tag element */
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static int hf_fdp_tag = -1;
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static int hf_fdp_tag_native = -1;
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static int hf_fdp_tag_type = -1;
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static int hf_fdp_tag_unknown = -1;
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/* VLAN Bitmap */
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static int hf_fdp_vlanmap = -1;
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static int hf_fdp_vlanmap_vlan = -1;
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/* String element */
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static int hf_fdp_string = -1;
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static int hf_fdp_string_data = -1;
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static int hf_fdp_string_text = -1;
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/* Net? element */
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static int hf_fdp_net = -1;
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static int hf_fdp_net_unknown = -1;
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static int hf_fdp_net_ip = -1;
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static int hf_fdp_net_iplength = -1;
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static gint ett_fdp = -1;
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static gint ett_fdp_tlv_header = -1;
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static gint ett_fdp_unknown = -1;
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static gint ett_fdp_string = -1;
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static gint ett_fdp_net = -1;
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static gint ett_fdp_tag = -1;
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static gint ett_fdp_vlanmap = -1;
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#define PROTO_SHORT_NAME "FDP"
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#define PROTO_LONG_NAME "Foundry Discovery Protocol"
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static const value_string foundry_pid_vals[] = {
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{ 0x2000, "FDP" },
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{ 0, NULL }
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};
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typedef enum {
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FDP_TYPE_NAME = 1,
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FDP_TYPE_NET = 2,
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FDP_TYPE_PORT = 3,
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FDP_TYPE_CAPABILITIES = 4,
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FDP_TYPE_VERSION = 5,
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FDP_TYPE_MODEL = 6,
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FDP_TYPE_VLANMAP = 0x0101,
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FDP_TYPE_TAG = 0x0102
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} fdp_type_t;
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static const value_string fdp_type_vals[] = {
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{ FDP_TYPE_NAME, "DeviceID"},
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{ FDP_TYPE_NET, "Net?"},
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{ FDP_TYPE_PORT, "Interface"},
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{ FDP_TYPE_CAPABILITIES, "Capabilities"},
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{ FDP_TYPE_VERSION, "Version"},
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{ FDP_TYPE_MODEL, "Platform"},
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{ FDP_TYPE_VLANMAP, "VLAN-Bitmap"},
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{ FDP_TYPE_TAG, "Tagging-Info"},
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{ 0, NULL }
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};
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static int
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dissect_tlv_header(tvbuff_t *tvb, packet_info *pinfo _U_, int offset, int length _U_, proto_tree *tree)
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{
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proto_item *tlv_item;
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proto_tree *tlv_tree;
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guint16 tlv_type;
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guint16 tlv_length;
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tlv_type = tvb_get_ntohs(tvb, offset);
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tlv_length = tvb_get_ntohs(tvb, offset + 2);
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tlv_item = proto_tree_add_text(tree, tvb, offset, 4,
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"Length %d, type %d = %s",
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tlv_length, tlv_type,
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val_to_str(tlv_type, fdp_type_vals, "Unknown (%d)"));
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tlv_tree = proto_item_add_subtree(tlv_item, ett_fdp_tlv_header);
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proto_tree_add_uint(tlv_tree, hf_fdp_tlv_type, tvb, offset, 2, tlv_type);
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offset += 2;
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proto_tree_add_uint(tlv_tree, hf_fdp_tlv_length, tvb, offset, 2, tlv_length);
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offset += 2;
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return offset;
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}
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static int
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dissect_string_tlv(tvbuff_t *tvb, packet_info *pinfo, int offset, int length, proto_tree *tree, const char* type_string)
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{
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proto_item *string_item;
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proto_tree *string_tree;
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guint8 *string_value;
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string_item = proto_tree_add_protocol_format(tree, hf_fdp_string,
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tvb, offset, length, "%s", type_string);
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string_tree = proto_item_add_subtree(string_item, ett_fdp_string);
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dissect_tlv_header(tvb, pinfo, offset, 4, string_tree);
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offset += 4;
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length -= 4;
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string_value = tvb_get_string(wmem_packet_scope(), tvb, offset, length);
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proto_item_append_text(string_item, ": \"%s\"",
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format_text(string_value, strlen(string_value)));
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proto_tree_add_item(string_tree, hf_fdp_string_data, tvb, offset, length, ENC_NA);
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proto_tree_add_item(string_tree, hf_fdp_string_text, tvb, offset, length, ENC_ASCII);
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return offset;
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}
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static void
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dissect_net_tlv(tvbuff_t *tvb, packet_info *pinfo, int offset, int length, proto_tree *tree)
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{
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proto_item *net_item;
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proto_tree *net_tree;
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net_item = proto_tree_add_protocol_format(tree, hf_fdp_net,
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tvb, offset, length, "Net?");
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net_tree = proto_item_add_subtree(net_item, ett_fdp_net);
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dissect_tlv_header(tvb, pinfo, offset, 4, net_tree);
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offset += 4;
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length -= 4;
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proto_tree_add_item(net_tree, hf_fdp_net_unknown, tvb, offset, 7, ENC_NA);
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offset += 7;
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length -= 7;
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/* Length of IP address block in bytes */
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proto_tree_add_item(net_tree, hf_fdp_net_iplength, tvb, offset, 2, ENC_BIG_ENDIAN);
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offset += 2;
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length -= 2;
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while (length >= 4) {
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proto_tree_add_item(net_tree, hf_fdp_net_ip, tvb, offset, 4, ENC_NA);
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offset += 4;
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length -= 4;
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}
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}
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static void
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dissect_vlanmap_tlv(tvbuff_t *tvb, packet_info *pinfo, int offset, int length, proto_tree *tree)
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{
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proto_item *vlanmap_item;
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proto_tree *vlanmap_tree;
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guint vlan, voffset;
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guint bitoffset, byteoffset;
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vlanmap_item = proto_tree_add_protocol_format(tree, hf_fdp_vlanmap,
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tvb, offset, length, "VLAN-Map");
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vlanmap_tree = proto_item_add_subtree(vlanmap_item, ett_fdp_vlanmap);
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dissect_tlv_header(tvb, pinfo, offset, 4, vlanmap_tree);
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offset += 4;
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length -= 4;
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voffset = 1;
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for (vlan = 1; vlan <= (guint)length*8; vlan++) {
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byteoffset = (vlan - voffset) / 8;
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bitoffset = (vlan - voffset) % 8;
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if (tvb_get_guint8(tvb, offset + byteoffset) & (1 << bitoffset)) {
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proto_tree_add_uint(vlanmap_tree, hf_fdp_vlanmap_vlan, tvb,
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offset + byteoffset, 1, vlan);
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}
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}
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}
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static void
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dissect_tag_tlv(tvbuff_t *tvb, packet_info *pinfo, int offset, int length, proto_tree *tree)
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{
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proto_item *tag_item;
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proto_tree *tag_tree;
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tag_item = proto_tree_add_protocol_format(tree, hf_fdp_tag,
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tvb, offset, length, "Port tag");
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tag_tree = proto_item_add_subtree(tag_item, ett_fdp_tag);
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dissect_tlv_header(tvb, pinfo, offset, 4, tag_tree);
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offset += 4;
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length -= 4;
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proto_tree_add_item(tag_tree, hf_fdp_tag_native, tvb, offset, 2, ENC_BIG_ENDIAN);
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offset += 2;
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length -= 2;
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proto_tree_add_item(tag_tree, hf_fdp_tag_type, tvb, offset, 2, ENC_BIG_ENDIAN);
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offset += 2;
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length -= 2;
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proto_tree_add_item(tag_tree, hf_fdp_tag_unknown, tvb, offset, length, ENC_NA);
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}
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static void
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dissect_unknown_tlv(tvbuff_t *tvb, packet_info *pinfo, int offset, int length, proto_tree *tree)
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{
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proto_item *unknown_item;
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proto_tree *unknown_tree;
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guint16 tlv_type;
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tlv_type = tvb_get_ntohs(tvb, offset);
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unknown_item = proto_tree_add_protocol_format(tree, hf_fdp_unknown,
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tvb, offset, length, "Unknown element [%u]", tlv_type);
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unknown_tree = proto_item_add_subtree(unknown_item, ett_fdp_unknown);
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dissect_tlv_header(tvb, pinfo, offset, 4, unknown_tree);
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offset += 4;
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length -= 4;
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proto_tree_add_item(unknown_tree, hf_fdp_unknown_data, tvb, offset, length, ENC_NA);
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}
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static void
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dissect_fdp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
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{
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proto_item *ti;
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proto_tree *fdp_tree = NULL;
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gint offset = 0;
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guint16 tlv_type;
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guint16 tlv_length;
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gint data_length;
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const char *type_string;
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col_set_str(pinfo->cinfo, COL_PROTOCOL, PROTO_SHORT_NAME);
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col_set_str(pinfo->cinfo, COL_INFO, PROTO_SHORT_NAME ":");
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if (tree) {
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data_length = tvb_reported_length_remaining(tvb, offset);
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ti = proto_tree_add_item(tree, proto_fdp, tvb, offset, -1, ENC_NA);
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fdp_tree = proto_item_add_subtree(ti, ett_fdp);
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proto_tree_add_item(fdp_tree, hf_fdp_version, tvb, offset, 1, ENC_NA);
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offset += 1;
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proto_tree_add_item(fdp_tree, hf_fdp_holdtime, tvb, offset, 1, ENC_NA);
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offset += 1;
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proto_tree_add_item(fdp_tree, hf_fdp_checksum, tvb, offset, 2, ENC_BIG_ENDIAN);
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offset += 2;
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/* Decode the individual TLVs */
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while (offset < data_length) {
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if (data_length - offset < 4) {
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proto_tree_add_text(fdp_tree, tvb, offset, 4,
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"Too few bytes left for TLV: %u (< 4)",
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data_length - offset);
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break;
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}
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tlv_type = tvb_get_ntohs(tvb, offset);
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tlv_length = tvb_get_ntohs(tvb, offset + 2);
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if ((tlv_length < 4) || (tlv_length > (data_length - offset))) {
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proto_tree_add_text(fdp_tree, tvb, offset, 0,
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"TLV with invalid length: %u", tlv_length);
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break;
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}
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type_string = val_to_str(tlv_type, fdp_type_vals, "[%u]");
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col_append_fstr(pinfo->cinfo, COL_INFO, " %s", type_string);
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switch (tlv_type) {
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case FDP_TYPE_NAME:
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case FDP_TYPE_PORT:
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case FDP_TYPE_CAPABILITIES:
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case FDP_TYPE_VERSION:
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case FDP_TYPE_MODEL:
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dissect_string_tlv(tvb, pinfo, offset, tlv_length, fdp_tree, type_string);
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break;
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case FDP_TYPE_NET:
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dissect_net_tlv(tvb, pinfo, offset, tlv_length, fdp_tree);
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break;
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case FDP_TYPE_TAG:
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dissect_tag_tlv(tvb, pinfo, offset, tlv_length, fdp_tree);
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break;
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case FDP_TYPE_VLANMAP:
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dissect_vlanmap_tlv(tvb, pinfo, offset, tlv_length, fdp_tree);
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break;
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default:
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dissect_unknown_tlv(tvb, pinfo, offset, tlv_length, fdp_tree);
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break;
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}
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offset += tlv_length;
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}
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}
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}
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void
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proto_register_fdp(void)
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{
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static hf_register_info hf[] = {
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/* FDP header */
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{ &hf_fdp_version,
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{ "Version?", "fdp.version", FT_UINT8, BASE_DEC, NULL,
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0x0, NULL, HFILL }},
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{ &hf_fdp_holdtime,
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{ "Holdtime", "fdp.holdtime", FT_UINT16, BASE_DEC, NULL,
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0x0, NULL, HFILL }},
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{ &hf_fdp_checksum,
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{ "Checksum?", "fdp.checksum", FT_UINT16, BASE_HEX, NULL,
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0x0, NULL, HFILL }},
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/* TLV header */
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{ &hf_fdp_tlv_type,
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{ "TLV type", "fdp.tlv.type", FT_UINT16, BASE_DEC, VALS(fdp_type_vals),
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0x0, NULL, HFILL }},
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{ &hf_fdp_tlv_length,
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{ "TLV length", "fdp.tlv.length", FT_UINT16, BASE_DEC, NULL,
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0x0, NULL, HFILL }},
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/* Unknown element */
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{ &hf_fdp_unknown,
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{ "Unknown", "fdp.unknown", FT_PROTOCOL, BASE_NONE, NULL,
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0x0, NULL, HFILL }},
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{ &hf_fdp_unknown_data,
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{ "Unknown", "fdp.unknown.data", FT_BYTES, BASE_NONE, NULL,
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0x0, NULL, HFILL }},
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/* String element */
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{ &hf_fdp_string,
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{ "DeviceID", "fdp.deviceid", FT_PROTOCOL, BASE_NONE, NULL,
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0x0, NULL, HFILL }},
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{ &hf_fdp_string_data,
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{ "Data", "fdp.string.data", FT_BYTES, BASE_NONE, NULL,
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0x0, NULL, HFILL }},
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{ &hf_fdp_string_text,
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{ "Text", "fdp.string.text", FT_STRING, BASE_NONE, NULL,
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0x0, NULL, HFILL }},
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/* Net? element */
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{ &hf_fdp_net,
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{ "Net?", "fdp.net", FT_PROTOCOL, BASE_NONE, NULL,
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0x0, NULL, HFILL }},
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{ &hf_fdp_net_unknown,
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{ "Net Unknown?", "fdp.net.unknown", FT_BYTES, BASE_NONE, NULL,
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0x0, NULL, HFILL }},
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{ &hf_fdp_net_iplength,
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{ "Net IP Bytes?", "fdp.net.iplength", FT_UINT16, BASE_DEC, NULL,
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0x0, "Number of bytes carrying IP addresses", HFILL }},
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{ &hf_fdp_net_ip,
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{ "Net IP Address?", "fdp.net.ip", FT_IPv4, BASE_NONE, NULL,
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0x0, NULL, HFILL }},
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/* VLAN Bitmap */
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{ &hf_fdp_vlanmap,
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{ "VLAN Map", "fdp.vlanmap", FT_PROTOCOL, BASE_NONE, NULL,
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0x0, NULL, HFILL }},
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{ &hf_fdp_vlanmap_vlan,
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{ "VLAN", "fdp.vlanmap.vlan", FT_UINT16, BASE_DEC, NULL,
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0x0, NULL, HFILL }},
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/* Port Tag element */
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{ &hf_fdp_tag,
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{ "Tag", "fdp.tag", FT_PROTOCOL, BASE_NONE, NULL,
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0x0, NULL, HFILL }},
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{ &hf_fdp_tag_native,
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{ "Native", "fdp.tag.native", FT_UINT16, BASE_DEC, NULL,
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0x0, NULL, HFILL }},
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{ &hf_fdp_tag_type,
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{ "Type", "fdp.tag.type", FT_UINT16, BASE_HEX, NULL,
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0x0, NULL, HFILL }},
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{ &hf_fdp_tag_unknown,
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{ "Unknown", "fdp.tag.unknown", FT_BYTES, BASE_NONE, NULL,
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0x0, NULL, HFILL }},
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};
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static gint *ett[] = {
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&ett_fdp,
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&ett_fdp_tlv_header,
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&ett_fdp_unknown,
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&ett_fdp_string,
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&ett_fdp_net,
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&ett_fdp_tag,
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&ett_fdp_vlanmap,
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};
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proto_fdp = proto_register_protocol(PROTO_LONG_NAME,
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PROTO_SHORT_NAME, "fdp");
|
|
proto_register_field_array(proto_fdp, hf, array_length(hf));
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
}
|
|
|
|
void
|
|
proto_reg_handoff_fdp(void)
|
|
{
|
|
dissector_handle_t fdp_handle;
|
|
|
|
fdp_handle = create_dissector_handle(dissect_fdp, proto_fdp);
|
|
dissector_add_uint("llc.foundry_pid", 0x2000, fdp_handle);
|
|
}
|
|
|
|
void
|
|
proto_register_foundry_oui(void)
|
|
{
|
|
static hf_register_info hf[] = {
|
|
{ &hf_llc_foundry_pid,
|
|
{ "PID", "llc.foundry_pid", FT_UINT16, BASE_HEX,
|
|
VALS(foundry_pid_vals), 0x0, NULL, HFILL }
|
|
}
|
|
};
|
|
|
|
llc_add_oui(OUI_FOUNDRY, "llc.foundry_pid", "LLC Foundry OUI PID", hf);
|
|
}
|