Ethereal-dev: Re: [Ethereal-dev] packet-lldp.c bug
Note: This archive is from the project's previous web site, ethereal.com. This list is no longer active.
From: Brian Bogora <brian_bogora@xxxxxxxxx>
Date: Tue, 20 Dec 2005 11:02:42 -0500
There is a bug in the lldp dissector, specifically in the Network Policy
portion of a Media TLV. The 5th byte was being used to get the DSCP
value instead of the 4th....As I don't know how to create a .patch file,
I attached the .c file...
Brian Joerg Mayer wrote:
On Sun, Sep 18, 2005 at 03:42:54AM -0400, Jim Young wrote:The changes to the packet-lldp.c file includes elaborating on the values of the 803.3 "PMD Auto-Negotiation Advertised Capability" and "Operational MAU Type" fields to also print the decimal value of "VLAN Identification" fields (in addition tothe hex value).applied Thanks Joerg
/* packet-lldp.c
* Routines for LLDP dissection
* By Juan Gonzalez <juan.gonzalez@xxxxxxxxxxxx>
* Copyright 2005 MITEL
*
* July 2005
* Modified by: Brian Bogora <brian_bogora@xxxxxxxxx>
*
* $Id: packet-lldp.c 16240 2005-10-16 03:45:31Z gerald $
*
* Ethereal - Network traffic analyzer
* By Gerald Combs <gerald@xxxxxxxxxxxx>
* 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
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <gmodule.h>
#include <glib.h>
#include <epan/packet.h>
#include <epan/prefs.h>
#include <epan/emem.h>
#include <epan/etypes.h>
#include <epan/oui.h>
/* TLV Types */
#define END_OF_LLDPDU_TLV_TYPE 0x00 /* Mandatory */
#define CHASSIS_ID_TLV_TYPE 0x01 /* Mandatory */
#define PORT_ID_TLV_TYPE 0x02 /* Mandatory */
#define TIME_TO_LIVE_TLV_TYPE 0x03 /* Mandatory */
#define PORT_DESCRIPTION_TLV_TYPE 0x04
#define SYSTEM_NAME_TLV_TYPE 0x05
#define SYSTEM_DESCRIPTION_TLV_TYPE 0x06
#define SYSTEM_CAPABILITIES_TLV_TYPE 0x07
#define MANAGEMENT_ADDR_TLV_TYPE 0x08
#define ORGANIZATION_SPECIFIC_TLV_TYPE 0x7F
/* Masks */
#define TLV_TYPE_MASK 0xFE00
#define TLV_TYPE(value) (((value) & TLV_TYPE_MASK) >> 9)
#define TLV_INFO_LEN_MASK 0x01FF
#define TLV_INFO_LEN(value) ((value) & TLV_INFO_LEN_MASK)
/* Initialize the protocol and registered fields */
static int proto_lldp = -1;
static int hf_lldp_tlv_type = -1;
static int hf_lldp_tlv_len = -1;
static int hf_chassis_id_subtype = -1;
static int hf_chassis_id = -1;
static int hf_chassis_id_mac = -1;
static int hf_chassis_id_ip4 = -1;
static int hf_chassis_id_ip6 = -1;
static int hf_port_id_subtype = -1;
static int hf_port_id_mac = -1;
static int hf_port_id_ip4 = -1;
static int hf_port_id_ip6 = -1;
static int hf_time_to_live = -1;
static int hf_mgn_addr_ipv4 = -1;
static int hf_mgn_addr_ipv6 = -1;
static int hf_mgn_addr_hex = -1;
static int hf_mgn_obj_id = -1;
static int hf_org_spc_oui = -1;
static int hf_ieee_802_1_subtype = -1;
static int hf_ieee_802_3_subtype = -1;
static int hf_media_tlv_subtype = -1;
/* Initialize the subtree pointers */
static gint ett_lldp = -1;
static gint ett_chassis_id = -1;
static gint ett_port_id = -1;
static gint ett_time_to_live = -1;
static gint ett_end_of_lldpdu = -1;
static gint ett_port_description = -1;
static gint ett_system_name = -1;
static gint ett_system_cap = -1;
static gint ett_system_cap_summary = -1;
static gint ett_system_cap_enabled = -1;
static gint ett_management_address = -1;
static gint ett_unknown_tlv = -1;
static gint ett_org_spc_tlv = -1;
static gint ett_port_vlan_flags = -1;
static gint ett_802_3_flags = -1;
static gint ett_802_3_autoneg_advertised = -1;
static gint ett_802_3_power = -1;
static gint ett_802_3_aggregation = -1;
static gint ett_media_capabilities = -1;
const value_string tlv_types[] = {
{ END_OF_LLDPDU_TLV_TYPE, "End of LLDPDU"},
{ CHASSIS_ID_TLV_TYPE, "Chassis Id"},
{ PORT_ID_TLV_TYPE, "Port Id"},
{ TIME_TO_LIVE_TLV_TYPE, "Time to Live"},
{ PORT_DESCRIPTION_TLV_TYPE, "Port Description"},
{ SYSTEM_NAME_TLV_TYPE, "System Name"},
{ SYSTEM_DESCRIPTION_TLV_TYPE, "System Description"},
{ SYSTEM_CAPABILITIES_TLV_TYPE, "System Capabilities"},
{ MANAGEMENT_ADDR_TLV_TYPE, "Management Address"},
{ ORGANIZATION_SPECIFIC_TLV_TYPE, "Organization Specific"},
{ 0, NULL}
};
const value_string chassis_id_subtypes[] = {
{ 0, "Reserved"},
{ 1, "Chassis component"},
{ 2, "Interface alias"},
{ 3, "Port component"},
{ 4, "MAC address"},
{ 5, "Network address"},
{ 6, "Interface name"},
{ 7, "Locally assigned"},
{ 0, NULL}
};
const value_string port_id_subtypes[] = {
{ 0, "Reserved"},
{ 1, "Interface alias"},
{ 2, "Port component"},
{ 3, "MAC address"},
{ 4, "Network address"},
{ 5, "Interface name"},
{ 6, "Agent circuit Id"},
{ 7, "Locally assigned"},
{ 0, NULL}
};
const value_string management_addr_values[] = {
{ 0, "Reserved"},
{ 1, "IPv4"},
{ 2, "IPv6"},
{ 3, "NSAP"},
{ 4, "HDLC (8-bit multidrop)"},
{ 5, "BBN 1822"},
{ 6, "802 (includes all 802 media plus Ethernet)"},
{ 7, "E.163"},
{ 8, "E.164 (SMDS, Frame Relay, ATM)"},
{ 9, "F.69 (Telex)"},
{ 10, "X.121 (X.25, Frame Relay)"},
{ 11, "IPX"},
{ 12, "Appletalk"},
{ 13, "Decnet IV"},
{ 14, "Banyan Vines"},
{ 15, "E.164 with NSAP format subaddress"},
{ 16, "DNS (Domain Name System)"},
{ 17, "Distinguished Name"},
{ 18, "AS Number"},
{ 19, "XTP over IP version 4"},
{ 20, "XTP over IP version 6"},
{ 21, "XTP native mode XTP"},
{ 22, "Fibre Channel World-Wide Port Name"},
{ 23, "Fibre Channel World-Wide Node Name"},
{ 24, "GWID"},
{ 0, NULL}
};
const value_string interface_subtype_values[] = {
{ 1, "Unknown"},
{ 2, "ifIndex"},
{ 3, "System port number"},
{ 0, NULL}
};
const value_string tlv_oui_subtype_vals[] = {
{ OUI_IEEE_802_1, "IEEE 802.1" },
{ OUI_IEEE_802_3, "IEEE 802.3" },
{ OUI_MEDIA_ENDPOINT, "TIA" },
{ 0, NULL }
};
/* IEEE 802.1 Subtypes */
const value_string ieee_802_1_subtypes[] = {
{ 0x01, "Port VLAN ID" },
{ 0x02, "Port and Protocol VLAN ID" },
{ 0x03, "VLAN Name" },
{ 0x04, "Protocol Identity" },
{ 0, NULL }
};
/* IEEE 802.3 Subtypes */
const value_string ieee_802_3_subtypes[] = {
{ 0x01, "MAC/PHY Configuration/Status" },
{ 0x02, "Power Via MDI" },
{ 0x03, "Link Aggregation" },
{ 0x04, "Maximum Frame Size" },
{ 0, NULL }
};
/* Media Subtypes */
const value_string media_subtypes[] = {
{ 1, "Media Capabilities" },
{ 2, "Network Policy" },
{ 3, "Location Identification" },
{ 4, "Extended Power-via-MDI" },
{ 5, "Inventory - Hardware Revision" },
{ 6, "Inventory - Firmware Revision" },
{ 7, "Inventory - Software Revision" },
{ 8, "Inventory - Serial Number" },
{ 9, "Inventory - Manufacturer Name" },
{ 10, "Inventory - Model Name" },
{ 11, "Inventory - Asset ID" },
{ 0, NULL }
};
/* Media Class Values */
const value_string media_class_values[] = {
{ 0, "Type Not Defined" },
{ 1, "Endpoint Class I" },
{ 2, "Endpoint Class II" },
{ 3, "Endpoint Class III" },
{ 4, "Network Connectivity" },
{ 0, NULL }
};
/* Media Application Types */
const value_string media_application_type[] = {
{ 0, "Reserved" },
{ 1, "Voice" },
{ 2, "Voice Signaling" },
{ 3, "Guest Voice" },
{ 4, "Guest Voice Signaling" },
{ 5, "Softphone Voice" },
{ 6, "Video Conferencing" },
{ 7, "Streaming Video" },
{ 8, "Video Signaling" },
{ 0, NULL }
};
/* Power Type */
const value_string media_power_type[] = {
{ 0, "PSE Device" },
{ 1, "PD Device" },
{ 0, NULL }
};
/* Power Priority */
const value_string media_power_priority[] = {
{ 0, "Unknown" },
{ 1, "Critical" },
{ 2, "High" },
{ 3, "Low" },
{ 0, NULL }
};
/* Power Sources */
const value_string media_power_pd_device[] = {
{ 0, "Unknown" },
{ 1, "PSE" },
{ 2, "Local" },
{ 3, "PSE and Local" },
{ 0, NULL }
};
const value_string media_power_pse_device[] = {
{ 0, "Unknown" },
{ 1, "Primary Power Source" },
{ 2, "Backup Power Source" },
{ 0, NULL }
};
/* Location data format */
const value_string location_data_format[] = {
{ 0, "Invalid " },
{ 1, "Coordinate-based LCI" },
{ 2, "Civic Address LCI" },
{ 3, "ECS ELIN" },
{ 0, NULL }
};
/* Civic Address LCI - What field */
const value_string civic_address_what_values[] = {
{ 0, "Location of the DHCP server" },
{ 1, "Location of the network element believed to be closest to the client" },
{ 2, "Location of the client"},
{ 0, NULL}
};
/* Civic Address Type field */
const value_string civic_address_type_values[] = {
{ 0, "Language" },
{ 1, "National subdivisions (province, state, etc)" },
{ 2, "County, parish, district" },
{ 3, "City, township" },
{ 4, "City division, borough, ward" },
{ 5, "Neighborhood, block" },
{ 6, "Street" },
{ 16, "Leading street direction" },
{ 17, "Trailing street suffix" },
{ 18, "Street suffix" },
{ 19, "House number" },
{ 20, "House number suffix" },
{ 21, "Landmark or vanity address" },
{ 22, "Additional location information" },
{ 23, "Name" },
{ 24, "Postal/ZIP code" },
{ 25, "Building" },
{ 26, "Unit" },
{ 27, "Floor" },
{ 28, "Room number" },
{ 29, "Place type" },
{ 128, "Script" },
{ 0, NULL }
};
/*
* Define the text strings for the LLDP 802.3 MAC/PHY Configuration/Status
* Operational MAU Type field.
*
* These values are taken from the DESCRIPTION field of the dot3MauType
* objects defined in RFC 3636 (or subsequent revisions).
*/
const value_string operational_mau_type_values[] = {
{ 1, "AUI - no internal MAU, view from AUI" },
{ 2, "10Base5 - thick coax MAU" },
{ 3, "Foirl - FOIRL MAU" },
{ 4, "10Base2 - thin coax MAU" },
{ 5, "10BaseT - UTP MAU" },
{ 6, "10BaseFP - passive fiber MAU" },
{ 7, "10BaseFB - sync fiber MAU" },
{ 8, "10BaseFL - async fiber MAU" },
{ 9, "10Broad36 - broadband DTE MAU" },
{ 10, "10BaseTHD - UTP MAU, half duplex mode" },
{ 11, "10BaseTFD - UTP MAU, full duplex mode" },
{ 12, "10BaseFLHD - async fiber MAU, half duplex mode" },
{ 13, "10BaseFLDF - async fiber MAU, full duplex mode" },
{ 14, "10BaseT4 - 4 pair category 3 UTP" },
{ 15, "100BaseTXHD - 2 pair category 5 UTP, half duplex mode" },
{ 16, "100BaseTXFD - 2 pair category 5 UTP, full duplex mode" },
{ 17, "100BaseFXHD - X fiber over PMT, half duplex mode" },
{ 18, "100BaseFXFD - X fiber over PMT, full duplex mode" },
{ 19, "100BaseT2HD - 2 pair category 3 UTP, half duplex mode" },
{ 20, "100BaseT2DF - 2 pair category 3 UTP, full duplex mode" },
{ 21, "1000BaseXHD - PCS/PMA, unknown PMD, half duplex mode" },
{ 22, "1000BaseXFD - PCS/PMA, unknown PMD, full duplex mode" },
{ 23, "1000BaseLXHD - Fiber over long-wavelength laser, half duplex mode" },
{ 24, "1000BaseLXFD - Fiber over long-wavelength laser, full duplex mode" },
{ 25, "1000BaseSXHD - Fiber over short-wavelength laser, half duplex mode" },
{ 26, "1000BaseSXFD - Fiber over short-wavelength laser, full duplex mode" },
{ 27, "1000BaseCXHD - Copper over 150-Ohm balanced cable, half duplex mode" },
{ 28, "1000BaseCXFD - Copper over 150-Ohm balanced cable, full duplex mode" },
{ 29, "1000BaseTHD - Four-pair Category 5 UTP, half duplex mode" },
{ 30, "1000BaseTFD - Four-pair Category 5 UTP, full duplex mode" },
{ 31, "10GigBaseX - X PCS/PMA, unknown PMD." },
{ 32, "10GigBaseLX4 - X fiber over WWDM optics" },
{ 33, "10GigBaseR - R PCS/PMA, unknown PMD." },
{ 34, "10GigBaseER - R fiber over 1550 nm optics" },
{ 35, "10GigBaseLR - R fiber over 1310 nm optics" },
{ 36, "10GigBaseSR - R fiber over 850 nm optics" },
{ 37, "10GigBaseW - W PCS/PMA, unknown PMD." },
{ 38, "10GigBaseEW - W fiber over 1550 nm optics" },
{ 39, "10GigBaseLW - W fiber over 1310 nm optics" },
{ 40, "10GigBaseSW - W fiber over 850 nm optics" },
{ 0, NULL }
};
/* System Capabilities */
#define SYSTEM_CAPABILITY_OTHER 0x0001
#define SYSTEM_CAPABILITY_REPEATER 0x0002
#define SYSTEM_CAPABILITY_BRIDGE 0x0004
#define SYSTEM_CAPABILITY_WLAN 0x0008
#define SYSTEM_CAPABILITY_ROUTER 0x0010
#define SYSTEM_CAPABILITY_TELEPHONE 0x0020
#define SYSTEM_CAPABILITY_DOCSIS 0x0040
#define SYSTEM_CAPABILITY_STATION 0x0080
/* Media Capabilities */
#define MEDIA_CAPABILITY_LLDP 0x0001
#define MEDIA_CAPABILITY_NETWORK_POLICY 0x0002
#define MEDIA_CAPABILITY_LOCATION_ID 0x0004
#define MEDIA_CAPABILITY_MDI_PSE 0x0008
#define MEDIA_CAPABILITY_MDI_PD 0x0010
#define MEDIA_CAPABILITY_INVENTORY 0x0020
/*
* Define constants for the LLDP 802.3 MAC/PHY Configuration/Status
* PMD Auto-Negotiation Advertised Capability field.
* These values are taken from the ifMauAutoNegCapAdvertisedBits
* object defined in RFC 3636.
*/
#define AUTONEG_OTHER 0x8000 /* bOther(0), -- other or unknown */
#define AUTONEG_10BASE_T 0x4000 /* b10baseT(1), -- 10BASE-T half duplex mode */
#define AUTONEG_10BASET_FD 0x2000 /* b10baseTFD(2), -- 10BASE-T full duplex mode */
#define AUTONEG_100BASE_T4 0x1000 /* b100baseT4(3), -- 100BASE-T4 */
#define AUTONEG_100BASE_TX 0x0800 /* b100baseTX(4), -- 100BASE-TX half duplex mode */
#define AUTONEG_100BASE_TXFD 0x0400 /* b100baseTXFD(5), -- 100BASE-TX full duplex mode */
#define AUTONEG_100BASE_T2 0x0200 /* b100baseT2(6), -- 100BASE-T2 half duplex mode */
#define AUTONEG_100BASE_T2FD 0x0100 /* b100baseT2FD(7), -- 100BASE-T2 full duplex mode */
#define AUTONEG_FDX_PAUSE 0x0080 /* bFdxPause(8), -- PAUSE for full-duplex links */
#define AUTONEG_FDX_APAUSE 0x0040 /* bFdxAPause(9), -- Asymmetric PAUSE for full-duplex links */
#define AUTONEG_FDX_SPAUSE 0x0020 /* bFdxSPause(10), -- Symmetric PAUSE for full-duplex links */
#define AUTONEG_FDX_BPAUSE 0x0010 /* bFdxBPause(11), -- Asymmetric and Symmetric PAUSE for full-duplex links */
#define AUTONEG_1000BASE_X 0x0008 /* b1000baseX(12), -- 1000BASE-X, -LX, -SX, -CX half duplex mode */
#define AUTONEG_1000BASE_XFD 0x0004 /* b1000baseXFD(13), -- 1000BASE-X, -LX, -SX, -CX full duplex mode */
#define AUTONEG_1000BASE_T 0x0002 /* b1000baseT(14), -- 1000BASE-T half duplex mode */
#define AUTONEG_1000BASE_TFD 0x0001 /* b1000baseTFD(15) -- 1000BASE-T full duplex mode */
#define MAX_MAC_LEN 6
/* Calculate Latitude and Longitude string */
/*
Parameters:
option = 0 -> Latitude
option = 1 -> Longitude
*/
static gchar *
get_latitude_or_longitude(int option, guint64 value)
{
guint64 tempValue = value;
gboolean negativeNum = FALSE;
guint32 integerPortion = 0;
const char *direction;
/* The latitude and longitude are 34 bit fixed point value consisting
of 9 bits of integer and 25 bits of fraction.
When option is equal to 0, positive numbers are represent a location
north of the equator and negative (2s complement) numbers are south of the equator.
When option is equal to 1, positive values are east of the prime
meridian and negative (2s complement) numbers are west of the prime meridian.
*/
if (value & G_GINT64_CONSTANT(0x0000000200000000))
{
/* Have a negative number (2s complement) */
negativeNum = TRUE;
tempValue = ~value;
tempValue += 1;
}
/* Get the integer portion */
integerPortion = (guint32)((tempValue & G_GINT64_CONSTANT(0x00000003FE000000)) >> 25);
/* Calculate decimal portion (using 25 bits for fraction) */
tempValue = (tempValue & G_GINT64_CONSTANT(0x0000000001FFFFFF))/33554432;
if (option == 0)
{
/* Latitude - north/south directions */
if (negativeNum)
direction = "South";
else
direction = "North";
}
else
{
/* Longitude - east/west directions */
if (negativeNum)
direction = "West";
else
direction = "East";
}
return ep_strdup_printf("%u.%04" PRIu64 " degrees %s",
integerPortion, tempValue, direction);
}
/* Dissect Chassis Id TLV (Mandatory) */
static gint32
dissect_lldp_chassis_id(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, guint32 offset)
{
guint8 tempType;
guint16 tempShort;
guint32 tempLen = 0;
const char *strPtr=NULL;
guint8 incorrectLen = 0; /* incorrect length if 1 */
const guint8 *mac_addr = NULL;
guint32 ip_addr;
struct e_in6_addr ip6_addr;
proto_tree *chassis_tree = NULL;
proto_item *tf = NULL;
/* Get tlv type */
tempShort = tvb_get_ntohs(tvb, offset);
tempType = TLV_TYPE(tempShort);
if (tempType != CHASSIS_ID_TLV_TYPE)
{
if (tree)
{
tf = proto_tree_add_text(tree, tvb, offset, 2, "Invalid Chassis ID (0x%02X)", tempType);
chassis_tree = proto_item_add_subtree(tf, ett_chassis_id);
proto_tree_add_text(chassis_tree, tvb, offset, 2, "%s Invalid Chassis ID (%u)",
decode_boolean_bitfield(tempType, TLV_TYPE_MASK, 16, "", ""), tempType);
}
return -1;
}
/* Get tlv length */
tempLen = TLV_INFO_LEN(tempShort);
if (tempLen < 2)
{
if (tree)
{
tf = proto_tree_add_text(tree, tvb, offset, 2, "Invalid Chassis ID Length (%u)", tempLen);
chassis_tree = proto_item_add_subtree(tf, ett_chassis_id);
proto_tree_add_item(chassis_tree, hf_lldp_tlv_type, tvb, offset, 2, FALSE);
proto_tree_add_text(chassis_tree, tvb, offset, 2, "%s Invalid Length: %u",
decode_boolean_bitfield(tempLen, TLV_INFO_LEN_MASK, 16, "", ""), tempLen);
}
return -1;
}
/* Get tlv subtype */
tempType = tvb_get_guint8(tvb, (offset+2));
switch (tempType)
{
case 4: /* MAC address */
{
if (tempLen != 7)
{
incorrectLen = 1; /* Invalid length */
break;
}
mac_addr=tvb_get_ptr(tvb, (offset+3), 6);
strPtr = ether_to_str(mac_addr);
break;
}
case 5: /* Network address */
{
/* Check for IPv4 or IPv6 */
if (tempLen == 5)
{
ip_addr = tvb_get_ipv4(tvb, (offset+3));
strPtr = ip_to_str((guint8 *)&ip_addr);
}
else if (tempLen == 17)
{
tvb_get_ipv6(tvb, (offset+3), &ip6_addr);
strPtr = ip6_to_str(&ip6_addr);
}
else
{
incorrectLen = 1; /* Invalid length */
break;
}
break;
}
case 2: /* Interface alias */
case 6: /* Interface name */
case 7: /* Locally assigned */
{
if (tempLen > 256)
{
incorrectLen = 1; /* Invalid length */
break;
}
strPtr = tvb_format_stringzpad(tvb, (offset+3), (tempLen-1));
break;
}
case 1: /* Chassis component */
case 3: /* Port component */
{
if (tempLen > 256)
{
incorrectLen = 1; /* Invalid length */
break;
}
strPtr = tvb_bytes_to_str(tvb, (offset+3), (tempLen-1));
break;
}
default: /* Reserved types */
{
if (tempLen > 256)
{
incorrectLen = 1; /* Invalid length */
break;
}
strPtr = "Reserved";
break;
}
}
if (incorrectLen == 1)
{
if (tree)
{
tf = proto_tree_add_text(tree, tvb, offset, 2, "Invalid Chassis ID Length (%u)", tempLen);
chassis_tree = proto_item_add_subtree(tf, ett_chassis_id);
proto_tree_add_item(chassis_tree, hf_lldp_tlv_type, tvb, offset, 2, FALSE);
proto_tree_add_text(chassis_tree, tvb, offset, 2, "%s Invalid Length: %u",
decode_boolean_bitfield(tempLen, TLV_INFO_LEN_MASK, 16, "", ""), tempLen);
/* Get chassis id subtype */
proto_tree_add_item(chassis_tree, hf_chassis_id_subtype, tvb, (offset+2), 1, FALSE);
}
return -1;
}
if (check_col(pinfo->cinfo, COL_INFO))
col_add_fstr(pinfo->cinfo, COL_INFO, "Chassis Id = %s ", strPtr);
if (tree)
{
/* Set chassis tree */
tf = proto_tree_add_text(tree, tvb, offset, (tempLen + 2), "Chassis Subtype = %s",
val_to_str(tempType, chassis_id_subtypes, "Reserved" ));
chassis_tree = proto_item_add_subtree(tf, ett_chassis_id);
proto_tree_add_item(chassis_tree, hf_lldp_tlv_type, tvb, offset, 2, FALSE);
proto_tree_add_item(chassis_tree, hf_lldp_tlv_len, tvb, offset, 2, FALSE);
/* Get chassis id subtype */
proto_tree_add_item(chassis_tree, hf_chassis_id_subtype, tvb, (offset+2), 1, FALSE);
/* Get chassis id */
switch (tempType)
{
case 4: /* MAC address */
proto_tree_add_ether(chassis_tree, hf_chassis_id_mac, tvb, (offset+3), 6, mac_addr);
break;
case 5: /* Network address */
if (tempLen == 5)
proto_tree_add_ipv4(chassis_tree, hf_chassis_id_ip4, tvb, (offset+3), 4, ip_addr);
else
proto_tree_add_ipv6(chassis_tree, hf_chassis_id_ip6, tvb, (offset+3), 16, ip6_addr.bytes);
break;
case 2: /* Interface alias */
case 6: /* Interface name */
case 7: /* Locally assigned */
proto_tree_add_text(chassis_tree, tvb, (offset+3), (tempLen-1), "Chassis Id: %s", strPtr);
break;
case 1: /* Chassis component */
case 3: /* Port component */
proto_tree_add_item(chassis_tree, hf_chassis_id, tvb, (offset+3), (tempLen-1), FALSE);
break;
}
}
return (tempLen + 2);
}
/* Dissect Port Id TLV (Mandatory) */
static gint32
dissect_lldp_port_id(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, guint32 offset)
{
guint8 tempType;
guint16 tempShort;
guint32 tempLen = 0;
const char *strPtr;
const guint8 *mac_addr = NULL;
guint32 ip_addr;
struct e_in6_addr ip6_addr;
proto_tree *port_tree = NULL;
proto_item *tf = NULL;
/* Get tlv type */
tempShort = tvb_get_ntohs(tvb, offset);
tempType = TLV_TYPE(tempShort);
if (tempType != PORT_ID_TLV_TYPE)
return -1;
/* Get tlv length and subtype */
tempLen = TLV_INFO_LEN(tempShort);
tempType = tvb_get_guint8(tvb, (offset+2));
/* Get port id */
switch (tempType)
{
case 3: /* MAC address */
{
if (tempLen != 7)
return -1; /* Invalid port id */
mac_addr=tvb_get_ptr(tvb, (offset+3), 6);
strPtr = ether_to_str(mac_addr);
break;
}
case 4: /* Network address */
{
/* Check for IPv4 or IPv6 */
if (tempLen == 5)
{
ip_addr = tvb_get_ipv4(tvb, (offset+3));
strPtr = ip_to_str((guint8 *)&ip_addr);
}
else if (tempLen == 17)
{
tvb_get_ipv6(tvb, (offset+3), &ip6_addr);
strPtr = ip6_to_str(&ip6_addr);
}
else
return -1; /* Invalid chassis id */
break;
}
default:
{
strPtr = tvb_format_stringzpad(tvb, (offset+3), (tempLen-1));
break;
}
}
if (check_col(pinfo->cinfo, COL_INFO))
col_append_fstr(pinfo->cinfo, COL_INFO, "Port Id = %s ", strPtr);
if (tree)
{
/* Set port tree */
tf = proto_tree_add_text(tree, tvb, offset, (tempLen + 2), "Port Subtype = %s",
val_to_str(tempType, port_id_subtypes, "Unknown" ));
port_tree = proto_item_add_subtree(tf, ett_port_id);
proto_tree_add_item(port_tree, hf_lldp_tlv_type, tvb, offset, 2, FALSE);
proto_tree_add_item(port_tree, hf_lldp_tlv_len, tvb, offset, 2, FALSE);
/* Get port id subtype */
proto_tree_add_item(port_tree, hf_port_id_subtype, tvb, (offset+2), 1, FALSE);
/* Get port id */
/*proto_tree_add_text(port_tree, tvb, (offset+3), (tempLen-1), "Port Id: %s", strPtr);*/
switch (tempType)
{
case 3: /* MAC address */
proto_tree_add_ether(port_tree, hf_port_id_mac, tvb, (offset+3), 6, mac_addr);
break;
case 4: /* Network address */
if (tempLen == 5)
proto_tree_add_ipv4(port_tree, hf_port_id_ip4, tvb, (offset+3), 4, ip_addr);
else
proto_tree_add_ipv6(port_tree, hf_port_id_ip6, tvb, (offset+3), 16, ip6_addr.bytes);
break;
default:
proto_tree_add_text(port_tree, tvb, (offset+3), (tempLen-1), "Port Id: %s", strPtr);
break;
}
}
return (tempLen + 2);
}
/* Dissect Time To Live TLV (Mandatory) */
static gint32
dissect_lldp_time_to_live(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, guint32 offset)
{
guint8 tempType;
guint16 tempShort;
guint32 tempLen = 0;
proto_tree *time_to_live_tree = NULL;
proto_item *tf = NULL;
/* Get tlv type */
tempShort = tvb_get_ntohs(tvb, offset);
tempType = TLV_TYPE(tempShort);
if (tempType != TIME_TO_LIVE_TLV_TYPE)
return -1;
/* Get tlv length and seconds field */
tempLen = TLV_INFO_LEN(tempShort);
tempShort = tvb_get_ntohs(tvb, (offset+2));
if (check_col(pinfo->cinfo, COL_INFO))
col_append_fstr(pinfo->cinfo, COL_INFO, "TTL = %u ", tempShort);
if (tree)
{
/* Set port tree */
tf = proto_tree_add_text(tree, tvb, offset, (tempLen + 2), "Time To Live = %u sec", tempShort);
time_to_live_tree = proto_item_add_subtree(tf, ett_time_to_live);
proto_tree_add_item(time_to_live_tree, hf_lldp_tlv_type, tvb, offset, 2, FALSE);
proto_tree_add_item(time_to_live_tree, hf_lldp_tlv_len, tvb, offset, 2, FALSE);
/* Display time to live information */
proto_tree_add_item(time_to_live_tree, hf_time_to_live, tvb, (offset+2), 2, FALSE);
}
return (tempLen + 2);
}
/* Dissect End of LLDPDU TLV (Mandatory) */
static gint32
dissect_lldp_end_of_lldpdu(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, guint32 offset)
{
guint16 tempLen;
guint16 tempShort;
proto_tree *end_of_lldpdu_tree = NULL;
proto_item *tf = NULL;
/* Get tlv type and length */
tempShort = tvb_get_ntohs(tvb, offset);
/* Get tlv length */
tempLen = TLV_INFO_LEN(tempShort);
if (tree)
{
/* Set port tree */
tf = proto_tree_add_text(tree, tvb, offset, (tempLen + 2), "End of LLDPDU");
end_of_lldpdu_tree = proto_item_add_subtree(tf, ett_end_of_lldpdu);
proto_tree_add_item(end_of_lldpdu_tree, hf_lldp_tlv_type, tvb, offset, 2, FALSE);
proto_tree_add_item(end_of_lldpdu_tree, hf_lldp_tlv_len, tvb, offset, 2, FALSE);
}
return -1; /* Force the lldp dissector to terminate */
}
/* Dissect Port Description TLV */
static gint32
dissect_lldp_port_desc(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, guint32 offset)
{
guint16 tempShort;
guint32 tempLen = 0;
const char *strPtr;
proto_tree *port_desc_tree = NULL;
proto_item *tf = NULL;
/* Get tlv type and length */
tempShort = tvb_get_ntohs(tvb, offset);
/* Get tlv length */
tempLen = TLV_INFO_LEN(tempShort);
if (tree)
{
strPtr = tvb_format_stringzpad(tvb, (offset+2), tempLen);
/* Set port tree */
tf = proto_tree_add_text(tree, tvb, offset, (tempLen + 2), "Port Description = %s", strPtr);
port_desc_tree = proto_item_add_subtree(tf, ett_port_description);
proto_tree_add_item(port_desc_tree, hf_lldp_tlv_type, tvb, offset, 2, FALSE);
proto_tree_add_item(port_desc_tree, hf_lldp_tlv_len, tvb, offset, 2, FALSE);
/* Display port description information */
proto_tree_add_text(port_desc_tree, tvb, (offset+2), tempLen, "Port Description: %s",
strPtr);
}
return (tempLen + 2);
}
/* Dissect System Name and description TLV */
static gint32
dissect_lldp_system_name(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, guint32 offset)
{
guint16 tempShort;
guint32 tempLen = 0;
guint8 tempType;
const char *strPtr;
proto_tree *system_name_tree = NULL;
proto_item *tf = NULL;
/* Get tlv type and length */
tempShort = tvb_get_ntohs(tvb, offset);
tempType = TLV_TYPE(tempShort);
/* Get tlv length */
tempLen = TLV_INFO_LEN(tempShort);
if (tree)
{
strPtr = tvb_format_stringzpad(tvb, (offset+2), tempLen);
/* Set system name tree */
if (tempType == SYSTEM_NAME_TLV_TYPE)
tf = proto_tree_add_text(tree, tvb, offset, (tempLen + 2), "System Name = %s", strPtr);
else
tf = proto_tree_add_text(tree, tvb, offset, (tempLen + 2), "System Description = %s", strPtr);
system_name_tree = proto_item_add_subtree(tf, ett_system_name);
proto_tree_add_item(system_name_tree, hf_lldp_tlv_type, tvb, offset, 2, FALSE);
proto_tree_add_item(system_name_tree, hf_lldp_tlv_len, tvb, offset, 2, FALSE);
/* Display system name information */
proto_tree_add_text(system_name_tree, tvb, (offset+2), tempLen, "%s = %s",
((tempType == SYSTEM_NAME_TLV_TYPE) ? "System Name" : "System Description"),
strPtr);
}
return (tempLen + 2);
}
/* Dissect System Capabilities TLV */
static gint32
dissect_lldp_system_capabilities(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, guint32 offset)
{
guint16 tempShort;
guint32 tempLen = 0;
guint16 tempCapability;
proto_tree *system_capabilities_tree = NULL;
proto_tree *capabilities_summary_tree = NULL;
proto_tree *capabilities_enabled_tree = NULL;
proto_item *tf = NULL;
/* Get tlv type and length */
tempShort = tvb_get_ntohs(tvb, offset);
/* Get tlv length */
tempLen = TLV_INFO_LEN(tempShort);
/* Get system capabilities */
tempCapability = tvb_get_ntohs(tvb, (offset+2));
if (tree)
{
/* Set system capabilities tree */
tf = proto_tree_add_text(tree, tvb, offset, (tempLen + 2), "Capabilities");
system_capabilities_tree = proto_item_add_subtree(tf, ett_system_cap);
proto_tree_add_item(system_capabilities_tree, hf_lldp_tlv_type, tvb, offset, 2, FALSE);
proto_tree_add_item(system_capabilities_tree, hf_lldp_tlv_len, tvb, offset, 2, FALSE);
/* Display system capability information */
tf = proto_tree_add_text(system_capabilities_tree, tvb, (offset+2), 2, "Capabilities: 0x%04x", tempCapability);
capabilities_summary_tree = proto_item_add_subtree(tf, ett_system_cap_summary);
/* Add capabilities to summary tree */
if (tempCapability & SYSTEM_CAPABILITY_OTHER)
proto_tree_add_text(capabilities_summary_tree, tvb, (offset+2), 2, "%s",
decode_boolean_bitfield(tempCapability, SYSTEM_CAPABILITY_OTHER,
16, "Other", ""));
if (tempCapability & SYSTEM_CAPABILITY_REPEATER)
proto_tree_add_text(capabilities_summary_tree, tvb, (offset+2), 2, "%s",
decode_boolean_bitfield(tempCapability, SYSTEM_CAPABILITY_REPEATER,
16, "Repeater", ""));
if (tempCapability & SYSTEM_CAPABILITY_BRIDGE)
proto_tree_add_text(capabilities_summary_tree, tvb, (offset+2), 2, "%s",
decode_boolean_bitfield(tempCapability, SYSTEM_CAPABILITY_BRIDGE,
16, "Bridge", ""));
if (tempCapability & SYSTEM_CAPABILITY_WLAN)
proto_tree_add_text(capabilities_summary_tree, tvb, (offset+2), 2, "%s",
decode_boolean_bitfield(tempCapability, SYSTEM_CAPABILITY_WLAN,
16, "WLAN access point", ""));
if (tempCapability & SYSTEM_CAPABILITY_ROUTER)
proto_tree_add_text(capabilities_summary_tree, tvb, (offset+2), 2, "%s",
decode_boolean_bitfield(tempCapability, SYSTEM_CAPABILITY_ROUTER,
16, "Router", ""));
if (tempCapability & SYSTEM_CAPABILITY_TELEPHONE)
proto_tree_add_text(capabilities_summary_tree, tvb, (offset+2), 2, "%s",
decode_boolean_bitfield(tempCapability, SYSTEM_CAPABILITY_TELEPHONE,
16, "Telephone", ""));
if (tempCapability & SYSTEM_CAPABILITY_DOCSIS)
proto_tree_add_text(capabilities_summary_tree, tvb, (offset+2), 2, "%s",
decode_boolean_bitfield(tempCapability, SYSTEM_CAPABILITY_DOCSIS,
16, "DOCSIS cable device", ""));
if (tempCapability & SYSTEM_CAPABILITY_STATION)
proto_tree_add_text(capabilities_summary_tree, tvb, (offset+2), 2, "%s",
decode_boolean_bitfield(tempCapability, SYSTEM_CAPABILITY_STATION,
16, "Station only", ""));
/* Get enabled summary */
tempShort = tvb_get_ntohs(tvb, (offset+4));
/* Display system capability information */
tf = proto_tree_add_text(system_capabilities_tree, tvb, (offset+4), 2, "Enabled Capabilities: 0x%04x", tempShort);
capabilities_enabled_tree = proto_item_add_subtree(tf, ett_system_cap_enabled);
/* Add capabilities to summary tree */
if (tempShort & SYSTEM_CAPABILITY_OTHER)
proto_tree_add_text(capabilities_enabled_tree, tvb, (offset+4), 2, "%s",
decode_boolean_bitfield(tempShort, SYSTEM_CAPABILITY_OTHER,
16, "Other", ""));
if (tempShort & SYSTEM_CAPABILITY_REPEATER)
proto_tree_add_text(capabilities_enabled_tree, tvb, (offset+4), 2, "%s",
decode_boolean_bitfield(tempShort, SYSTEM_CAPABILITY_REPEATER,
16, "Repeater", ""));
if (tempShort & SYSTEM_CAPABILITY_BRIDGE)
proto_tree_add_text(capabilities_enabled_tree, tvb, (offset+4), 2, "%s",
decode_boolean_bitfield(tempShort, SYSTEM_CAPABILITY_BRIDGE,
16, "Bridge", ""));
if (tempShort & SYSTEM_CAPABILITY_WLAN)
proto_tree_add_text(capabilities_enabled_tree, tvb, (offset+4), 2, "%s",
decode_boolean_bitfield(tempShort, SYSTEM_CAPABILITY_WLAN,
16, "WLAN access point", ""));
if (tempShort & SYSTEM_CAPABILITY_ROUTER)
proto_tree_add_text(capabilities_enabled_tree, tvb, (offset+4), 2, "%s",
decode_boolean_bitfield(tempShort, SYSTEM_CAPABILITY_ROUTER,
16, "Router", ""));
if (tempShort & SYSTEM_CAPABILITY_TELEPHONE)
proto_tree_add_text(capabilities_enabled_tree, tvb, (offset+4), 2, "%s",
decode_boolean_bitfield(tempShort, SYSTEM_CAPABILITY_TELEPHONE,
16, "Telephone", ""));
if (tempShort & SYSTEM_CAPABILITY_DOCSIS)
proto_tree_add_text(capabilities_enabled_tree, tvb, (offset+4), 2, "%s",
decode_boolean_bitfield(tempShort, SYSTEM_CAPABILITY_DOCSIS,
16, "DOCSIS cable device", ""));
if (tempShort & SYSTEM_CAPABILITY_STATION)
proto_tree_add_text(capabilities_enabled_tree, tvb, (offset+4), 2, "%s",
decode_boolean_bitfield(tempShort, SYSTEM_CAPABILITY_STATION,
16, "Station only", ""));
}
return (tempLen + 2);
}
/* Dissect Management Address TLV */
static gint32
dissect_lldp_management_address(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, guint32 offset)
{
guint16 tempShort;
guint32 tempLen = 0;
guint8 tempByte;
guint8 stringLen = 0;
guint32 tempOffset = offset;
guint32 tempLong;
proto_tree *system_mgm_addr = NULL;
proto_item *tf = NULL;
/* Get tlv type and length */
tempShort = tvb_get_ntohs(tvb, tempOffset);
/* Get tlv length */
tempLen = TLV_INFO_LEN(tempShort);
if (tree)
{
/* Set system capabilities tree */
tf = proto_tree_add_text(tree, tvb, tempOffset, (tempLen + 2), "Management Address");
system_mgm_addr = proto_item_add_subtree(tf, ett_management_address);
proto_tree_add_item(system_mgm_addr, hf_lldp_tlv_type, tvb, tempOffset, 2, FALSE);
proto_tree_add_item(system_mgm_addr, hf_lldp_tlv_len, tvb, tempOffset, 2, FALSE);
tempOffset += 2;
/* Get management address string length */
stringLen = tvb_get_guint8(tvb, tempOffset);
proto_tree_add_text(system_mgm_addr, tvb, tempOffset, 1, "Address String Length: %u", stringLen);
tempOffset++;
/* Get management address subtype */
tempByte = tvb_get_guint8(tvb, tempOffset);
proto_tree_add_text(system_mgm_addr, tvb, tempOffset, 1, "Address Subtype: %s (%u)",
val_to_str(tempByte, management_addr_values, "Undefined"),
tempByte);
tempOffset++;
/* Get address */
switch (tempByte)
{
/* XXX - Should we throw an exception if stringLen doesn't match our address length? */
case 1: /* IPv4 */
proto_tree_add_item(system_mgm_addr, hf_mgn_addr_ipv4, tvb, tempOffset, 4, FALSE);
break;
case 2: /* IPv6 */
proto_tree_add_item(system_mgm_addr, hf_mgn_addr_ipv6, tvb, tempOffset, 16, FALSE);
break;
default:
proto_tree_add_item(system_mgm_addr, hf_mgn_addr_hex, tvb, tempOffset, (stringLen-1), FALSE);
break;
}
tempOffset += (stringLen-1);
/* Get interface numbering subtype */
tempByte = tvb_get_guint8(tvb, tempOffset);
proto_tree_add_text(system_mgm_addr, tvb, tempOffset, 1, "Interface Subtype: %s (%u)",
val_to_str(tempByte, interface_subtype_values, "Undefined"),
tempByte);
tempOffset++;
/* Get interface number */
tempLong = tvb_get_ntohl(tvb, tempOffset);
proto_tree_add_text(system_mgm_addr, tvb, tempOffset, 4, "Interface Number: %u", tempLong);
tempOffset += 4;
/* Get OID string length */
stringLen = tvb_get_guint8(tvb, tempOffset);
proto_tree_add_text(system_mgm_addr, tvb, tempOffset, 1, "OID String Length: %u", stringLen);
if (stringLen > 0)
{
tempOffset++;
/* Get OID identifier */
proto_tree_add_item(system_mgm_addr, hf_mgn_obj_id, tvb, tempOffset, stringLen, FALSE);
}
}
return (tempLen + 2);
}
/* Dissect IEEE 802.1 TLVs */
static void
dissect_ieee_802_1_tlv(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, guint32 offset)
{
guint8 subType;
guint8 tempByte;
guint16 tempShort;
guint32 tempOffset = offset;
proto_tree *vlan_flags = NULL;
proto_item *tf = NULL;
/* Get subtype */
subType = tvb_get_guint8(tvb, tempOffset);
if (tree)
proto_tree_add_item(tree, hf_ieee_802_1_subtype, tvb, tempOffset, 1, FALSE);
tempOffset++;
switch (subType)
{
case 0x01: /* Port VLAN ID */
{
/* Get port vland id */
tempShort = tvb_get_ntohs(tvb, tempOffset);
if (tree)
proto_tree_add_text(tree, tvb, tempOffset, 2, "Port VLAN Identifier: %u (0x%04X)", tempShort, tempShort);
break;
}
case 0x02: /* Port and Protocol VLAN ID */
{
/* Get flags */
tempByte = tvb_get_guint8(tvb, tempOffset);
if (tree)
{
tf = proto_tree_add_text(tree, tvb, tempOffset, 1, "Flags: 0x%02x", tempByte);
vlan_flags = proto_item_add_subtree(tf, ett_port_vlan_flags);
/* Get supported flag */
proto_tree_add_text(vlan_flags, tvb, tempOffset, 1, "%s",
decode_boolean_bitfield(tempByte, 0x01, 8, "Port and Protocol VLAN: Supported",
"Port and Protocol VLAN: Not Supported"));
/* Get enabled flag */
proto_tree_add_text(vlan_flags, tvb, tempOffset, 1, "%s",
decode_boolean_bitfield(tempByte, 0x02, 8, "Port and Protocol VLAN: Enabled",
"Port and Protocol VLAN: Not Enabled"));
}
tempOffset++;
/* Get port and protocol vlan id */
tempShort = tvb_get_ntohs(tvb, tempOffset);
if (tree)
proto_tree_add_text(tree, tvb, tempOffset, 2, "Port and Protocol VLAN Identifier: %u (0x%04X)", tempShort, tempShort);
break;
}
case 0x03: /* VLAN Name */
{
/* Get vlan id */
tempShort = tvb_get_ntohs(tvb, tempOffset);
if (tree)
proto_tree_add_text(tree, tvb, tempOffset, 2, "VLAN Identifier: %u (0x%04X)", tempShort, tempShort);
tempOffset += 2;
/* Get vlan name length */
tempByte = tvb_get_guint8(tvb, tempOffset);
if (tree)
proto_tree_add_text(tree, tvb, tempOffset, 1, "VLAN Name Length: %u", tempByte);
tempOffset++;
if (tempByte > 0)
{
if (tree)
proto_tree_add_text(tree, tvb, tempOffset, tempByte, "VLAN Name: %s",
tvb_format_stringzpad(tvb, tempOffset, tempByte));
}
break;
}
case 0x04: /* Protocol ID */
{
/* Get protocal id length */
tempByte = tvb_get_guint8(tvb, tempOffset);
if (tree)
proto_tree_add_text(tree, tvb, tempOffset, 1, "Protocol Identity Length: %u", tempByte);
tempOffset++;
if (tempByte > 0)
{
if (tree)
proto_tree_add_text(tree, tvb, tempOffset, tempByte, "Protocol Identity: %s",
tvb_bytes_to_str(tvb, tempOffset, tempByte));
}
break;
}
}
return;
}
/* Dissect IEEE 802.3 TLVs */
static void
dissect_ieee_802_3_tlv(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, guint32 offset)
{
guint8 subType;
guint8 tempByte;
guint16 tempShort;
guint32 tempLong;
guint32 tempOffset = offset;
proto_tree *mac_phy_flags = NULL;
proto_tree *autoneg_advertised_subtree = NULL;
proto_item *tf = NULL;
/* Get subtype */
subType = tvb_get_guint8(tvb, tempOffset);
if (tree)
proto_tree_add_item(tree, hf_ieee_802_3_subtype, tvb, tempOffset, 1, FALSE);
tempOffset++;
switch (subType)
{
case 0x01: /* MAC/PHY Configuration/Status */
{
/* Get auto-negotiation info */
tempByte = tvb_get_guint8(tvb, tempOffset);
if (tree)
{
tf = proto_tree_add_text(tree, tvb, tempOffset, 1, "Auto-Negotiation Support/Status: 0x%02x", tempByte);
mac_phy_flags = proto_item_add_subtree(tf, ett_802_3_flags);
/* Get supported flag */
proto_tree_add_text(mac_phy_flags, tvb, tempOffset, 1, "%s",
decode_boolean_bitfield(tempByte, 0x01, 8, "Auto-Negotiation: Supported",
"Auto-Negotiation: Not Supported"));
/* Get enabled flag */
proto_tree_add_text(mac_phy_flags, tvb, tempOffset, 1, "%s",
decode_boolean_bitfield(tempByte, 0x02, 8, "Auto-Negotiation: Enabled",
"Auto-Negotiation: Not Enabled"));
}
tempOffset++;
/* Get pmd auto-negotiation advertised capability */
tempShort = tvb_get_ntohs(tvb, tempOffset);
if (tree)
{
tf = proto_tree_add_text(tree, tvb, tempOffset, 2, "PMD Auto-Negotiation Advertised Capability: 0x%04X", tempShort);
autoneg_advertised_subtree = proto_item_add_subtree(tf, ett_802_3_autoneg_advertised);
if (tempShort & AUTONEG_1000BASE_TFD)
proto_tree_add_text(autoneg_advertised_subtree, tvb, (offset+2), 2, "%s",
decode_boolean_bitfield(tempShort, AUTONEG_1000BASE_TFD,
16, "1000BASE-T (full duplex mode)", ""));
if (tempShort & AUTONEG_1000BASE_T)
proto_tree_add_text(autoneg_advertised_subtree, tvb, (offset+2), 2, "%s",
decode_boolean_bitfield(tempShort, AUTONEG_1000BASE_T,
16, "1000BASE-T (half duplex mode)", ""));
if (tempShort & AUTONEG_1000BASE_XFD)
proto_tree_add_text(autoneg_advertised_subtree, tvb, (offset+2), 2, "%s",
decode_boolean_bitfield(tempShort, AUTONEG_1000BASE_XFD,
16, "1000BASE-X (-LX, -SX, -CX full duplex mode)", ""));
if (tempShort & AUTONEG_1000BASE_X)
proto_tree_add_text(autoneg_advertised_subtree, tvb, (offset+2), 2, "%s",
decode_boolean_bitfield(tempShort, AUTONEG_1000BASE_X,
16, "1000BASE-X (-LX, -SX, -CX half duplex mode)", ""));
if (tempShort & AUTONEG_FDX_BPAUSE)
proto_tree_add_text(autoneg_advertised_subtree, tvb, (offset+2), 2, "%s",
decode_boolean_bitfield(tempShort, AUTONEG_FDX_BPAUSE,
16, "Asymmetric and Symmetric PAUSE (for full-duplex links)", ""));
if (tempShort & AUTONEG_FDX_SPAUSE)
proto_tree_add_text(autoneg_advertised_subtree, tvb, (offset+2), 2, "%s",
decode_boolean_bitfield(tempShort, AUTONEG_FDX_SPAUSE,
16, "Symmetric PAUSE (for full-duplex links)", ""));
if (tempShort & AUTONEG_FDX_APAUSE)
proto_tree_add_text(autoneg_advertised_subtree, tvb, (offset+2), 2, "%s",
decode_boolean_bitfield(tempShort, AUTONEG_FDX_APAUSE,
16, "Asymmetric PAUSE (for full-duplex links)", ""));
if (tempShort & AUTONEG_FDX_PAUSE)
proto_tree_add_text(autoneg_advertised_subtree, tvb, (offset+2), 2, "%s",
decode_boolean_bitfield(tempShort, AUTONEG_FDX_PAUSE,
16, "PAUSE (for full-duplex links)", ""));
if (tempShort & AUTONEG_100BASE_T2FD)
proto_tree_add_text(autoneg_advertised_subtree, tvb, (offset+2), 2, "%s",
decode_boolean_bitfield(tempShort, AUTONEG_100BASE_T2FD,
16, "100BASE-T2 (full duplex mode)", ""));
if (tempShort & AUTONEG_100BASE_T2)
proto_tree_add_text(autoneg_advertised_subtree, tvb, (offset+2), 2, "%s",
decode_boolean_bitfield(tempShort, AUTONEG_100BASE_T2,
16, "100BASE-T2 (half duplex mode)", ""));
if (tempShort & AUTONEG_100BASE_TXFD)
proto_tree_add_text(autoneg_advertised_subtree, tvb, (offset+2), 2, "%s",
decode_boolean_bitfield(tempShort, AUTONEG_100BASE_TXFD,
16, "100BASE-TX (full duplex mode)", ""));
if (tempShort & AUTONEG_100BASE_TX)
proto_tree_add_text(autoneg_advertised_subtree, tvb, (offset+2), 2, "%s",
decode_boolean_bitfield(tempShort, AUTONEG_100BASE_TX,
16, "100BASE-TX (half duplex mode)", ""));
if (tempShort & AUTONEG_100BASE_T4)
proto_tree_add_text(autoneg_advertised_subtree, tvb, (offset+2), 2, "%s",
decode_boolean_bitfield(tempShort, AUTONEG_100BASE_T4,
16, "100BASE-T4", ""));
if (tempShort & AUTONEG_10BASET_FD)
proto_tree_add_text(autoneg_advertised_subtree, tvb, (offset+2), 2, "%s",
decode_boolean_bitfield(tempShort, AUTONEG_10BASET_FD,
16, "10BASE-T (full duplex mode)", ""));
if (tempShort & AUTONEG_10BASE_T)
proto_tree_add_text(autoneg_advertised_subtree, tvb, (offset+2), 2, "%s",
decode_boolean_bitfield(tempShort, AUTONEG_10BASE_T,
16, "10BASE-T (half duplex mode)", ""));
if (tempShort & AUTONEG_OTHER)
proto_tree_add_text(autoneg_advertised_subtree, tvb, (offset+2), 2, "%s",
decode_boolean_bitfield(tempShort, AUTONEG_OTHER,
16, "other or unknown", ""));
}
tempOffset += 2;
/* Get operational MAU type */
tempShort = tvb_get_ntohs(tvb, tempOffset);
if (tree)
proto_tree_add_text(tree, tvb, tempOffset, 2, "Operational MAU Type: %s (0x%04X)",
val_to_str(tempShort,operational_mau_type_values,"Unknown"),
tempShort);
tempOffset += 2;
break;
}
case 0x02: /* MDI Power Support */
{
/* Get MDI power support info */
tempByte = tvb_get_guint8(tvb, tempOffset);
if (tree)
{
tf = proto_tree_add_text(tree, tvb, tempOffset, 1, "MDI Power Support: 0x%02x", tempByte);
mac_phy_flags = proto_item_add_subtree(tf, ett_802_3_power);
/* Get port class */
proto_tree_add_text(mac_phy_flags, tvb, tempOffset, 1, "%s",
decode_boolean_bitfield(tempByte, 0x01, 8, "Port Class: PSE",
"Port Class: PD"));
/* Get PSE MDI power support */
proto_tree_add_text(mac_phy_flags, tvb, tempOffset, 1, "%s",
decode_boolean_bitfield(tempByte, 0x02, 8, "PSE MDI Power: Supported",
"PSE MDI Power: Not Supported"));
/* Get PSE MDI power state */
proto_tree_add_text(mac_phy_flags, tvb, tempOffset, 1, "%s",
decode_boolean_bitfield(tempByte, 0x04, 8, "PSE MDI Power Enabled: Yes",
"PSE MDI Power Enabled: No"));
/* Get PSE pairs control ability */
proto_tree_add_text(mac_phy_flags, tvb, tempOffset, 1, "%s",
decode_boolean_bitfield(tempByte, 0x08, 8, "PSE Pairs Control Ability: Yes",
"PSE Pairs Control Ability: No"));
}
tempOffset++;
/* Get PSE power pair */
tempByte = tvb_get_guint8(tvb, tempOffset);
if (tree)
proto_tree_add_text(tree, tvb, tempOffset, 1, "PSE Power Pair: %u", tempByte);
tempOffset++;
/* Get power class */
tempByte = tvb_get_guint8(tvb, tempOffset);
if (tree)
proto_tree_add_text(tree, tvb, tempOffset, 1, "Power Class: %u", tempByte);
tempOffset++;
break;
}
case 0x03: /* Link Aggregation */
{
/* Get aggregation status */
tempByte = tvb_get_guint8(tvb, tempOffset);
if (tree)
{
tf = proto_tree_add_text(tree, tvb, tempOffset, 1, "Aggregation Status: 0x%02x", tempByte);
mac_phy_flags = proto_item_add_subtree(tf, ett_802_3_aggregation);
/* Get aggregation capability */
proto_tree_add_text(mac_phy_flags, tvb, tempOffset, 1, "%s",
decode_boolean_bitfield(tempByte, 0x01, 8, "Aggregation Capability: Yes",
"Aggregation Capability: No"));
/* Get aggregation status */
proto_tree_add_text(mac_phy_flags, tvb, tempOffset, 1, "%s",
decode_boolean_bitfield(tempByte, 0x02, 8, "Aggregation Status: Enabled",
"Aggregation Status: Not Enabled"));
}
tempOffset++;
/* Get aggregated port id */
tempLong = tvb_get_ntohl(tvb, tempOffset);
if (tree)
proto_tree_add_text(tree, tvb, tempOffset, 4, "Aggregated Port Id: %u", tempLong);
tempOffset += 4;
break;
}
case 0x04: /* Maximum Frame Size */
{
/* Get maximum frame size */
tempShort = tvb_get_ntohs(tvb, tempOffset);
if (tree)
proto_tree_add_text(tree, tvb, tempOffset, 2, "Maximum Frame Size: %u", tempShort);
tempOffset += 2;
break;
}
}
return;
}
/* Dissect Media TLVs */
static void
dissect_media_tlv(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, guint32 offset, guint16 tlvLen)
{
guint32 tempOffset = offset;
guint8 subType;
guint16 tempShort;
guint16 tempVLAN;
guint8 tempByte;
guint32 tempLong;
const char *strPtr;
guint32 LCI_Length;
guint64 temp64bit = 0;
proto_tree *media_flags = NULL;
proto_item *tf = NULL;
/* Get subtype */
subType = tvb_get_guint8(tvb, tempOffset);
if (tree)
proto_tree_add_item(tree, hf_media_tlv_subtype, tvb, tempOffset, 1, FALSE);
tempOffset++;
tlvLen--;
switch (subType)
{
case 1: /* LLDP-MED Capabilities */
{
/* Get capabilities */
if (tlvLen < 2)
{
proto_tree_add_text(tree, tvb, tempOffset, 0, "TLV too short");
return;
}
tempShort = tvb_get_ntohs(tvb, tempOffset);
if (tree)
{
tf = proto_tree_add_text(tree, tvb, tempOffset, 2, "Capabilities: 0x%04x", tempShort);
media_flags = proto_item_add_subtree(tf, ett_media_capabilities);
if (tempShort & MEDIA_CAPABILITY_LLDP)
proto_tree_add_text(media_flags, tvb, tempOffset, 2, "%s",
decode_boolean_bitfield(tempShort, MEDIA_CAPABILITY_LLDP, 16,
"LLDP-MED Capabilities", ""));
if (tempShort & MEDIA_CAPABILITY_NETWORK_POLICY)
proto_tree_add_text(media_flags, tvb, tempOffset, 2, "%s",
decode_boolean_bitfield(tempShort, MEDIA_CAPABILITY_NETWORK_POLICY, 16,
"Network Policy", ""));
if (tempShort & MEDIA_CAPABILITY_LOCATION_ID)
proto_tree_add_text(media_flags, tvb, tempOffset, 2, "%s",
decode_boolean_bitfield(tempShort, MEDIA_CAPABILITY_LOCATION_ID, 16,
"Location Identification", ""));
if (tempShort & MEDIA_CAPABILITY_MDI_PSE)
proto_tree_add_text(media_flags, tvb, tempOffset, 2, "%s",
decode_boolean_bitfield(tempShort, MEDIA_CAPABILITY_MDI_PSE, 16,
"Extended Power via MDI-PSE", ""));
if (tempShort & MEDIA_CAPABILITY_MDI_PD)
proto_tree_add_text(media_flags, tvb, tempOffset, 2, "%s",
decode_boolean_bitfield(tempShort, MEDIA_CAPABILITY_MDI_PD, 16,
"Extended Power via MDI-PD", ""));
if (tempShort & MEDIA_CAPABILITY_INVENTORY)
proto_tree_add_text(media_flags, tvb, tempOffset, 2, "%s",
decode_boolean_bitfield(tempShort, MEDIA_CAPABILITY_INVENTORY, 16,
"Inventory", ""));
}
tempOffset += 2;
tlvLen -= 2;
/* Get Class type */
if (tlvLen < 1)
{
proto_tree_add_text(tree, tvb, tempOffset, 0, "TLV too short");
return;
}
tempByte = tvb_get_guint8(tvb, tempOffset);
if (tree)
proto_tree_add_text(tree, tvb, tempOffset, 1, "Class Type: %s", val_to_str(tempByte, media_class_values, "Unknown"));
tempOffset++;
tlvLen--;
break;
}
case 2: /* Network Policy */
{
/* Get application type */
if (tlvLen < 1)
{
proto_tree_add_text(tree, tvb, tempOffset, 0, "TLV too short");
return;
}
tempByte = tvb_get_guint8(tvb, tempOffset);
if (tree)
proto_tree_add_text(tree, tvb, tempOffset, 1, "Applicaton Type: %s (%u)",
val_to_str(tempByte, media_application_type, "Unknown"), tempByte);
tempOffset++;
tlvLen--;
/* Get flags */
if (tlvLen < 1)
{
proto_tree_add_text(tree, tvb, tempOffset, 0, "TLV too short");
return;
}
tempByte = tvb_get_guint8(tvb, tempOffset);
/* Unknown policy flag */
if (tree)
proto_tree_add_text(tree, tvb, tempOffset, 1, "%s",
decode_boolean_bitfield(tempByte, 0x80, 8,"Policy: Unknown", "Policy: Defined"));
/* Tagged flag */
if (tree)
proto_tree_add_text(tree, tvb, tempOffset, 1, "%s",
decode_boolean_bitfield(tempByte, 0x40, 8,"Tagged: Yes", "Tagged: No"));
/* Get vlan id */
if (tlvLen < 1)
{
proto_tree_add_text(tree, tvb, tempOffset, 0, "TLV too short");
return;
}
tempShort = tvb_get_ntohs(tvb, tempOffset);
tempVLAN = (tempShort & 0x1FFE) >> 1;
if (tree)
proto_tree_add_text(tree, tvb, tempOffset, 2, "%s %u",
decode_boolean_bitfield(tempShort, 0x1FFE, 16, "VLAN Id:", "VLAN Id:"), tempVLAN);
tempOffset++;
tlvLen--;
/* Get L2 priority */
if (tlvLen < 1)
{
proto_tree_add_text(tree, tvb, tempOffset, 0, "TLV too short");
return;
}
tempShort = tvb_get_ntohs(tvb, tempOffset);
if (tree)
proto_tree_add_text(tree, tvb, tempOffset, 2, "%s %u",
decode_boolean_bitfield(tempShort, 0x01C0, 16, "L2 Priority:", "L2 Priority:"),
((tempShort & 0x01C0) >> 6));
tempOffset++;
tlvLen--;
/* Get DSCP value */
tempByte = tvb_get_guint8(tvb, tempOffset);
if (tree)
proto_tree_add_text(tree, tvb, tempOffset, 1, "%s %u",
decode_boolean_bitfield(tempByte, 0x3F, 8, "DSCP Value:", "DSCP Value:"),
(tempByte & 0x3F));
break;
}
case 3: /* Location Identification */
{
/* Get location data format */
if (tlvLen < 1)
{
proto_tree_add_text(tree, tvb, tempOffset, 0, "TLV too short");
return;
}
tempByte = tvb_get_guint8(tvb, tempOffset);
if (tree)
proto_tree_add_text(tree, tvb, tempOffset, 1, "Location Data Format: %s (%u)",
val_to_str(tempByte, location_data_format, "Unknown"), tempByte);
tempOffset++;
tlvLen--;
switch (tempByte)
{
case 1: /* Coordinate-based LCI */
{
/*
* See RFC 3825.
* XXX - should this be handled by the BOOTP
* dissector, and exported to us?
*/
if (tlvLen < 16)
{
proto_tree_add_text(tree, tvb, tempOffset, 0, "TLV too short");
return;
}
/* Get latitude resolution */
tempByte = tvb_get_guint8(tvb, tempOffset);
if (tree)
proto_tree_add_text(tree, tvb, tempOffset, 1, "%s %u",
decode_boolean_bitfield(tempByte, 0xFC, 8, "Latitude Resolution:", "Latitude Resolution:"),
((tempByte & 0xFC) >> 2));
/* Get latitude */
temp64bit = tvb_get_ntoh64(tvb, tempOffset);
temp64bit = (temp64bit & G_GINT64_CONSTANT(0x03FFFFFFFF000000)) >> 24;
if (tree)
proto_tree_add_text(tree, tvb, tempOffset, 5, "Latitude: %s (0x%16" PRIX64 ")",
get_latitude_or_longitude(0, temp64bit),
temp64bit);
tempOffset += 5;
/* Get longitude resolution */
tempByte = tvb_get_guint8(tvb, tempOffset);
if (tree)
proto_tree_add_text(tree, tvb, tempOffset, 1, "%s %u",
decode_boolean_bitfield(tempByte, 0xFC, 8, "Longitude Resolution:", "Longitude Resolution:"),
((tempByte & 0xFC) >> 2));
/* Get longitude */
temp64bit = tvb_get_ntoh64(tvb, tempOffset);
temp64bit = (temp64bit & G_GINT64_CONSTANT(0x03FFFFFFFF000000)) >> 24;
;
if (tree)
proto_tree_add_text(tree, tvb, tempOffset, 5, "Longitude: %s (0x%16" PRIX64 ")",
get_latitude_or_longitude(1,temp64bit),
temp64bit);
tempOffset += 5;
/* Altitude Type */
tempByte = tvb_get_guint8(tvb, tempOffset);
if (tree)
{
tf = proto_tree_add_text(tree, tvb, tempOffset, 1, "%s",
decode_boolean_bitfield(tempByte, 0xF0, 8, "Altitude Type: ", "Altitude Type: "));
switch ((tempByte >> 4))
{
case 1:
proto_item_append_text(tf, "Meters (1)");
break;
case 2:
proto_item_append_text(tf, "Floors (2)");
break;
default:
proto_item_append_text(tf, " Unknown (%u)", (tempByte >> 4));
break;
}
}
/* Get Altitude Resolution */
tempShort = tvb_get_ntohs(tvb, tempOffset);
if (tree)
proto_tree_add_text(tree, tvb, tempOffset, 2, "%s %u",
decode_boolean_bitfield(tempShort, 0x0FC0, 16, "Altitude Resolution: ", "Altitude Type: "),
((tempShort & 0x0FC0) >> 6));
tempOffset++;
/* Get Altitude */
tempLong = (tvb_get_ntohl(tvb, tempOffset) & 0x03FFFFFFF);
if (tree)
proto_tree_add_text(tree, tvb, tempOffset, 4, "Altitude: 0x%08X", tempLong);
tempOffset += 4;
/* Get datum */
tempByte = tvb_get_guint8(tvb, tempOffset);
if (tree)
proto_tree_add_text(tree, tvb, tempOffset, 1, "Datum: %u", tempByte);
break;
}
case 2: /* Civic Address LCI */
{
/*
* See draft-ietf-geopriv-dhcp-civil-07.
* XXX - should this be handled by the BOOTP
* dissector, and exported to us?
*/
if (tlvLen < 1)
{
proto_tree_add_text(tree, tvb, tempOffset, 0, "TLV too short");
return;
}
/* Get LCI length */
tempByte = tvb_get_guint8(tvb, tempOffset);
tlvLen--;
if (tempByte > tlvLen)
{
if (tree)
proto_tree_add_text(tree, tvb, tempOffset, 1, "LCI Length: %u (greater than TLV length)", tempByte);
return;
}
if (tree)
proto_tree_add_text(tree, tvb, tempOffset, 1, "LCI Length: %u", tempByte);
LCI_Length = (guint32)tempByte;
tempOffset++;
/* Get what value */
if (LCI_Length < 1)
{
proto_tree_add_text(tree, tvb, tempOffset, 0, "LCI Length too short");
return;
}
tempByte = tvb_get_guint8(tvb, tempOffset);
if (tree)
proto_tree_add_text(tree, tvb, tempOffset, 1, "What: %s (%u)",
val_to_str(tempByte,civic_address_what_values,"Unknown"),
tempByte);
tempOffset++;
LCI_Length--;
/* Get country code */
if (LCI_Length < 2)
{
proto_tree_add_text(tree, tvb, tempOffset, 0, "LCI Length too short");
return;
}
if (tree)
proto_tree_add_text(tree, tvb, tempOffset, 2, "Country: %s",
tvb_format_text(tvb, tempOffset, 2));
tempOffset += 2;
LCI_Length -= 2;
while (LCI_Length > 0)
{
/* Get CA Type */
if (LCI_Length < 1)
{
proto_tree_add_text(tree, tvb, tempOffset, 0, "LCI Length too short");
return;
}
tempByte = tvb_get_guint8(tvb, tempOffset);
if (tree)
proto_tree_add_text(tree, tvb, tempOffset, 1, "CA Type: %s (%u)",
val_to_str(tempByte,civic_address_type_values,"Unknown"),
tempByte);
tempOffset++;
LCI_Length--;
/* Get CA Length */
if (LCI_Length < 1)
{
proto_tree_add_text(tree, tvb, tempOffset, 0, "LCI Length too short");
return;
}
tempByte = tvb_get_guint8(tvb, tempOffset);
if (tree)
proto_tree_add_text(tree, tvb, tempOffset, 1, "CA Length: %u", tempByte);
tempOffset++;
LCI_Length--;
/* Make sure the CA value is within the specified length */
if (tempByte > LCI_Length)
return;
if (tempByte > 0)
{
/* Get CA Value */
if (tree)
proto_tree_add_text(tree, tvb, tempOffset, tempByte, "CA Value: %s",
tvb_format_stringzpad(tvb, tempOffset, tempByte));
tempOffset += tempByte;
LCI_Length -= tempByte;
}
}
break;
}
case 3: /* ECS ELIN */
{
if (tlvLen > 0)
{
if (tree)
proto_tree_add_text(tree, tvb, tempOffset, tlvLen, "ELIN: %s",
tvb_format_stringzpad(tvb, tempOffset, tlvLen));
}
break;
}
}
break;
}
case 4: /* Extended Power-via-MDI */
{
/* Get first byte */
tempByte = tvb_get_guint8(tvb, tempOffset);
/* Determine power type */
subType = ((tempByte & 0xC0) >> 6);
if (tree)
proto_tree_add_text(tree, tvb, tempOffset, 1, "%s %s",
decode_boolean_bitfield(tempByte, 0xC0, 8, "Power Type:", "Power Type:"),
val_to_str(subType, media_power_type, "Unknown"));
/* Determine power source */
switch (subType)
{
case 0:
{
subType = ((tempByte & 0x30) >> 4);
strPtr = val_to_str(subType, media_power_pse_device, "Reserved");
break;
}
case 1:
{
subType = ((tempByte & 0x30) >> 4);
strPtr = val_to_str(subType, media_power_pd_device, "Reserved");
break;
}
default:
{
strPtr = "Unknown";
break;
}
}
if (tree)
proto_tree_add_text(tree, tvb, tempOffset, 1, "%s %s",
decode_boolean_bitfield(tempByte, 0x30, 8, "Power Source:", "Power Source:"),
strPtr);
/* Determine power priority */
subType = (tempByte & 0x0F);
if (tree)
proto_tree_add_text(tree, tvb, tempOffset, 1, "%s %s",
decode_boolean_bitfield(tempByte, 0x0F, 8, "Power Priority:", "Power Priority:"),
val_to_str(subType, media_power_priority, "Reserved"));
tempOffset++;
/* Get power value */
tempShort = tvb_get_ntohs(tvb, tempOffset);
if (tree)
proto_tree_add_text(tree, tvb, tempOffset, 2, "Power Value: %u", tempShort);
break;
}
case 5: /* Hardware Revision */
{
/* Figure out the length of the hardware revision field */
if (tlvLen > 0)
{
if (tree)
proto_tree_add_text(tree, tvb, tempOffset, tlvLen, "Hardware Revision: %s",
tvb_format_stringzpad(tvb, tempOffset, tlvLen));
}
break;
}
case 6: /* Firmware Revision */
{
/* Figure out the length of the firmware revision field */
if (tlvLen > 0)
{
if (tree)
proto_tree_add_text(tree, tvb, tempOffset, tlvLen, "Firmware Revision: %s",
tvb_format_stringzpad(tvb, tempOffset, tlvLen));
}
break;
}
case 7: /* Software Revision */
{
/* Figure out the length of the software revision field */
if (tlvLen > 0)
{
if (tree)
proto_tree_add_text(tree, tvb, tempOffset, tlvLen, "Software Revision: %s",
tvb_format_stringzpad(tvb, tempOffset, tlvLen));
}
break;
}
case 8: /* Serial Number */
{
/* Figure out the length of the serial number field */
if (tlvLen > 0)
{
if (tree)
proto_tree_add_text(tree, tvb, tempOffset, tlvLen, "Serial Number: %s",
tvb_format_stringzpad(tvb, tempOffset, tlvLen));
}
break;
}
case 9: /* Manufacturer Name */
{
/* Figure out the length of the manufacturer name field */
if (tlvLen > 0)
{
if (tree)
proto_tree_add_text(tree, tvb, tempOffset, tlvLen, "Manufacturer Name: %s",
tvb_format_stringzpad(tvb, tempOffset, tlvLen));
}
break;
}
case 10: /* Model Name */
{
/* Figure out the length of the model name field */
if (tlvLen > 0)
{
if (tree)
proto_tree_add_text(tree, tvb, tempOffset, tlvLen, "Model Name: %s",
tvb_format_stringzpad(tvb, tempOffset, tlvLen));
}
break;
}
case 11: /* Asset ID */
{
/* Figure out the length of the asset id field */
if (tlvLen > 0)
{
if (tree)
proto_tree_add_text(tree, tvb, tempOffset, tlvLen, "Asset ID: %s",
tvb_format_stringzpad(tvb, tempOffset, tlvLen));
}
break;
}
}
return;
}
/* Dissect Organizational Specific TLV */
static gint32
dissect_organizational_specific_tlv(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, guint32 offset)
{
guint16 tempLen;
guint16 tempShort;
guint32 oui;
guint8 subType;
const char *ouiStr;
const char *subTypeStr;
proto_tree *org_tlv_tree = NULL;
proto_item *tf = NULL;
/* Get tlv type and length */
tempShort = tvb_get_ntohs(tvb, offset);
/* Get tlv length */
tempLen = TLV_INFO_LEN(tempShort);
/* Get OUI value */
oui = tvb_get_ntoh24(tvb, (offset+2));
subType = tvb_get_guint8(tvb, (offset+5));
ouiStr = val_to_str(oui, tlv_oui_subtype_vals, "Unknown");
switch(oui)
{
case OUI_IEEE_802_1:
subTypeStr = val_to_str(subType, ieee_802_1_subtypes, "Unknown");
break;
case OUI_IEEE_802_3:
subTypeStr = val_to_str(subType, ieee_802_3_subtypes, "Unknown");
break;
case OUI_MEDIA_ENDPOINT:
subTypeStr = val_to_str(subType, media_subtypes, "Unknown");
break;
default:
subTypeStr = "Unknown";
break;
}
if (tree)
{
tf = proto_tree_add_text(tree, tvb, offset, (tempLen + 2), "%s - %s",
ouiStr, subTypeStr);
org_tlv_tree = proto_item_add_subtree(tf, ett_org_spc_tlv);
proto_tree_add_item(org_tlv_tree, hf_lldp_tlv_type, tvb, offset, 2, FALSE);
}
if (tempLen < 4)
{
if (tree)
proto_tree_add_uint_format(org_tlv_tree, hf_lldp_tlv_len, tvb, offset, 2,
tempShort, "TLV Length: %u (too short, must be >= 4)", tempLen);
return (tempLen + 2);
}
if (tree)
{
proto_tree_add_item(org_tlv_tree, hf_lldp_tlv_len, tvb, offset, 2, FALSE);
/* Display organizational unique id */
proto_tree_add_uint(org_tlv_tree, hf_org_spc_oui, tvb, (offset+2), 3, oui);
}
switch (oui)
{
case OUI_IEEE_802_1:
dissect_ieee_802_1_tlv(tvb, pinfo, org_tlv_tree, (offset+5));
break;
case OUI_IEEE_802_3:
dissect_ieee_802_3_tlv(tvb, pinfo, org_tlv_tree, (offset+5));
break;
case OUI_MEDIA_ENDPOINT:
dissect_media_tlv(tvb, pinfo, org_tlv_tree, (offset+5), (guint16) (tempLen-3));
break;
}
return (tempLen + 2);
}
/* Dissect Unknown TLV */
static gint32
dissect_lldp_unknown_tlv(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, guint32 offset)
{
guint16 tempLen;
guint16 tempShort;
proto_tree *unknown_tlv_tree = NULL;
proto_item *tf = NULL;
/* Get tlv type and length */
tempShort = tvb_get_ntohs(tvb, offset);
/* Get tlv length */
tempLen = TLV_INFO_LEN(tempShort);
if (tree)
{
tf = proto_tree_add_text(tree, tvb, offset, (tempLen + 2), "Unknown TLV");
unknown_tlv_tree = proto_item_add_subtree(tf, ett_unknown_tlv);
proto_tree_add_item(unknown_tlv_tree, hf_lldp_tlv_type, tvb, offset, 2, FALSE);
proto_tree_add_item(unknown_tlv_tree, hf_lldp_tlv_len, tvb, offset, 2, FALSE);
}
return (tempLen + 2);
}
/* Dissect LLDP packets */
static void
dissect_lldp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
proto_item *ti;
proto_tree *lldp_tree = NULL;
guint32 offset = 0;
gint32 rtnValue = 0;
guint16 tempShort;
guint8 tempType;
gboolean reachedEnd = FALSE;
if (check_col(pinfo->cinfo, COL_PROTOCOL))
col_set_str(pinfo->cinfo, COL_PROTOCOL, "LLDP");
/* Clear the information column on summary display */
if (check_col(pinfo->cinfo, COL_INFO)) {
col_clear(pinfo->cinfo, COL_INFO);
}
if (tree)
{
ti = proto_tree_add_item(tree, proto_lldp, tvb, offset, -1, FALSE);
lldp_tree = proto_item_add_subtree(ti, ett_lldp);
}
/* Get chassis id tlv */
rtnValue = dissect_lldp_chassis_id(tvb, pinfo, lldp_tree, offset);
if (rtnValue < 0)
{
if (check_col(pinfo->cinfo, COL_INFO))
col_set_str(pinfo->cinfo, COL_INFO, "Invalid Chassis ID TLV");
return;
}
offset += rtnValue;
/* Get port id tlv */
rtnValue = dissect_lldp_port_id(tvb, pinfo, lldp_tree, offset);
if (rtnValue < 0)
{
if (check_col(pinfo->cinfo, COL_INFO))
col_set_str(pinfo->cinfo, COL_INFO, "Invalid Port ID TLV");
return;
}
offset += rtnValue;
/* Get time to live tlv */
rtnValue = dissect_lldp_time_to_live(tvb, pinfo, lldp_tree, offset);
if (rtnValue < 0)
{
if (check_col(pinfo->cinfo, COL_INFO))
col_set_str(pinfo->cinfo, COL_INFO, "Invalid Time-to-Live TLV");
return;
}
offset += rtnValue;
/* Dissect optional tlv's until end-of-lldpdu is reached */
while (!reachedEnd)
{
tempShort = tvb_get_ntohs(tvb, offset);
tempType = TLV_TYPE(tempShort);
switch (tempType)
{
case CHASSIS_ID_TLV_TYPE:
rtnValue = dissect_lldp_chassis_id(tvb, pinfo, lldp_tree, offset);
rtnValue = -1; /* Duplicate chassis id tlv */
if (check_col(pinfo->cinfo, COL_INFO))
col_set_str(pinfo->cinfo, COL_INFO, "Duplicate Chassis ID TLV");
break;
case PORT_ID_TLV_TYPE:
rtnValue = dissect_lldp_port_id(tvb, pinfo, lldp_tree, offset);
rtnValue = -1; /* Duplicate port id tlv */
if (check_col(pinfo->cinfo, COL_INFO))
col_set_str(pinfo->cinfo, COL_INFO, "Duplicate Port ID TLV");
break;
case TIME_TO_LIVE_TLV_TYPE:
rtnValue = dissect_lldp_time_to_live(tvb, pinfo, lldp_tree, offset);
rtnValue = -1; /* Duplicate time-to-live tlv */
if (check_col(pinfo->cinfo, COL_INFO))
col_set_str(pinfo->cinfo, COL_INFO, "Duplicate Time-To-Live TLV");
break;
case END_OF_LLDPDU_TLV_TYPE:
rtnValue = dissect_lldp_end_of_lldpdu(tvb, pinfo, lldp_tree, offset);
break;
case PORT_DESCRIPTION_TLV_TYPE:
rtnValue = dissect_lldp_port_desc(tvb, pinfo, lldp_tree, offset);
break;
case SYSTEM_NAME_TLV_TYPE:
case SYSTEM_DESCRIPTION_TLV_TYPE:
rtnValue = dissect_lldp_system_name(tvb, pinfo, lldp_tree, offset);
break;
case SYSTEM_CAPABILITIES_TLV_TYPE:
rtnValue = dissect_lldp_system_capabilities(tvb, pinfo, lldp_tree, offset);
break;
case MANAGEMENT_ADDR_TLV_TYPE:
rtnValue = dissect_lldp_management_address(tvb, pinfo, lldp_tree, offset);
break;
case ORGANIZATION_SPECIFIC_TLV_TYPE:
rtnValue = dissect_organizational_specific_tlv(tvb, pinfo, lldp_tree, offset);
break;
default:
rtnValue = dissect_lldp_unknown_tlv(tvb, pinfo, lldp_tree, offset);
break;
}
if (rtnValue < 0)
reachedEnd = TRUE;
else
offset += rtnValue;
}
}
/* Register the protocol with Ethereal */
void
proto_register_lldp(void)
{
/* Setup list of header fields */
static hf_register_info hf[] = {
{ &hf_lldp_tlv_type,
{ "TLV Type", "lldp.tlv.type", FT_UINT16, BASE_DEC,
VALS(tlv_types), TLV_TYPE_MASK, "", HFILL }
},
{ &hf_lldp_tlv_len,
{ "TLV Length", "lldp.tlv.len", FT_UINT16, BASE_DEC,
NULL, TLV_INFO_LEN_MASK, "", HFILL }
},
{ &hf_chassis_id_subtype,
{ "Chassis Id Subtype", "lldp.chassis.subtype", FT_UINT8, BASE_DEC,
VALS(chassis_id_subtypes), 0, "", HFILL }
},
{ &hf_chassis_id,
{ "Chassis Id", "lldp.chassis.id", FT_BYTES, BASE_HEX,
NULL, 0, "", HFILL }
},
{ &hf_chassis_id_mac,
{ "Chassis Id", "lldp.chassis.id.mac", FT_ETHER, BASE_NONE,
NULL, 0, "", HFILL }
},
{ &hf_chassis_id_ip4,
{ "Chassis Id", "lldp.chassis.id.ip4", FT_IPv4, BASE_NONE,
NULL, 0, "", HFILL }
},
{ &hf_chassis_id_ip6,
{ "Chassis Id", "lldp.chassis.id.ip6", FT_IPv6, BASE_NONE,
NULL, 0, "", HFILL }
},
{ &hf_port_id_subtype,
{ "Port Id Subtype", "lldp.port.subtype", FT_UINT8, BASE_DEC,
VALS(port_id_subtypes), 0, "", HFILL }
},
{ &hf_port_id_mac,
{ "Port Id", "lldp.port.id.mac", FT_ETHER, BASE_NONE,
NULL, 0, "", HFILL }
},
{ &hf_port_id_ip4,
{ "Port Id", "lldp.port.id.ip4", FT_IPv4, BASE_NONE,
NULL, 0, "", HFILL }
},
{ &hf_port_id_ip6,
{ "Port Id", "lldp.port.id.ip6", FT_IPv6, BASE_NONE,
NULL, 0, "", HFILL }
},
{ &hf_time_to_live,
{ "Seconds", "lldp.time_to_live", FT_UINT16, BASE_DEC,
NULL, 0, "", HFILL }
},
{ &hf_mgn_addr_ipv4,
{ "Management Address", "lldp.mgn.addr.ip4", FT_IPv4, BASE_NONE,
NULL, 0, "", HFILL }
},
{ &hf_mgn_addr_ipv6,
{ "Management Address", "lldp.mgn.addr.ip6", FT_IPv6, BASE_NONE,
NULL, 0, "", HFILL }
},
{ &hf_mgn_addr_hex,
{ "Management Address", "lldp.mgn.addr.hex", FT_BYTES, BASE_HEX,
NULL, 0, "", HFILL }
},
{ &hf_mgn_obj_id,
{ "Object Identifier", "lldp.mgn.obj.id", FT_BYTES, BASE_HEX,
NULL, 0, "", HFILL }
},
{ & hf_org_spc_oui,
{ "Organization Unique Code", "lldp.orgtlv.oui", FT_UINT24, BASE_HEX,
VALS(tlv_oui_subtype_vals), 0x0, "", HFILL }
},
{ &hf_ieee_802_1_subtype,
{ "IEEE 802.1 Subtype", "lldp.ieee.802_1.subtype", FT_UINT8, BASE_HEX,
VALS(ieee_802_1_subtypes), 0x0, "", HFILL }
},
{ &hf_ieee_802_3_subtype,
{ "IEEE 802.3 Subtype", "lldp.ieee.802_3.subtype", FT_UINT8, BASE_HEX,
VALS(ieee_802_3_subtypes), 0x0, "", HFILL }
},
{ &hf_media_tlv_subtype,
{ "Media Subtype", "lldp.media.subtype", FT_UINT8, BASE_HEX,
VALS(media_subtypes), 0x0, "", HFILL }
},
};
/* Setup protocol subtree array */
static gint *ett[] = {
&ett_lldp,
&ett_chassis_id,
&ett_port_id,
&ett_time_to_live,
&ett_end_of_lldpdu,
&ett_port_description,
&ett_system_name,
&ett_system_cap,
&ett_system_cap_summary,
&ett_system_cap_enabled,
&ett_management_address,
&ett_unknown_tlv,
&ett_org_spc_tlv,
&ett_port_vlan_flags,
&ett_802_3_flags,
&ett_802_3_autoneg_advertised,
&ett_802_3_power,
&ett_802_3_aggregation,
&ett_media_capabilities,
};
/* Register the protocol name and description */
proto_lldp = proto_register_protocol("Link Layer Discovery Protocol", "LLDP", "lldp");
/* Required function calls to register the header fields and subtrees used */
proto_register_field_array(proto_lldp, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
}
void
proto_reg_handoff_lldp(void)
{
dissector_handle_t lldp_handle;
lldp_handle = create_dissector_handle(dissect_lldp,proto_lldp);
dissector_add("ethertype", ETHERTYPE_LLDP, lldp_handle);
}
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