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Dissector for the proprietary protocol FEFD (Far End Failure Detction) from Force10networks. svn path=/trunk/; revision=27571
921 lines
26 KiB
C
921 lines
26 KiB
C
/* packet-llc.c
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* Routines for IEEE 802.2 LLC layer
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* Gilbert Ramirez <gram@alumni.rice.edu>
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*
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* $Id$
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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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <glib.h>
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#include <epan/packet.h>
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#include <epan/oui.h>
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#include <epan/xdlc.h>
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#include <epan/etypes.h>
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#include <epan/llcsaps.h>
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#include <epan/bridged_pids.h>
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#include <epan/ppptypes.h>
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#include <epan/arcnet_pids.h>
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#include <epan/conversation.h>
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#include "packet-scsi.h"
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#include "packet-fc.h"
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#include "packet-ip.h"
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#include "packet-ipx.h"
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#include "packet-netbios.h"
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#include "packet-vines.h"
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#include <epan/sna-utils.h>
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#include "packet-llc.h"
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#define UDP_PORT_LLC1 12000
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#define UDP_PORT_LLC2 12001
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#define UDP_PORT_LLC3 12002
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#define UDP_PORT_LLC4 12003
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#define UDP_PORT_LLC5 12004
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static int proto_llc = -1;
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static int hf_llc_dsap = -1;
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static int hf_llc_ssap = -1;
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static int hf_llc_dsap_ig = -1;
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static int hf_llc_ssap_cr = -1;
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static int hf_llc_ctrl = -1;
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static int hf_llc_n_r = -1;
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static int hf_llc_n_s = -1;
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static int hf_llc_p = -1;
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static int hf_llc_p_ext = -1;
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static int hf_llc_f = -1;
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static int hf_llc_f_ext = -1;
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static int hf_llc_s_ftype = -1;
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static int hf_llc_u_modifier_cmd = -1;
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static int hf_llc_u_modifier_resp = -1;
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static int hf_llc_ftype_i = -1;
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static int hf_llc_ftype_s_u = -1;
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static int hf_llc_ftype_s_u_ext = -1;
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static int hf_llc_type = -1;
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static int hf_llc_oui = -1;
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static int hf_llc_pid = -1;
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static int proto_basicxid = -1;
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static int hf_llc_xid_format = -1;
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static int hf_llc_xid_types = -1;
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static int hf_llc_xid_wsize = -1;
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static gint ett_llc = -1;
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static gint ett_llc_ctrl = -1;
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static gint ett_llc_basicxid = -1;
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static dissector_table_t subdissector_table;
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static dissector_table_t xid_subdissector_table;
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static dissector_handle_t bpdu_handle;
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static dissector_handle_t eth_withoutfcs_handle;
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static dissector_handle_t eth_withfcs_handle;
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static dissector_handle_t fddi_handle;
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static dissector_handle_t tr_handle;
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static dissector_handle_t turbo_handle;
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static dissector_handle_t data_handle;
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/*
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* Group/Individual bit, in the DSAP.
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*/
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#define DSAP_GI_BIT 0x01
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/*
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* Command/Response bit, in the SSAP.
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*
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* The low-order bit of the SSAP apparently determines whether this
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* is a request or a response. (RFC 1390, "Transmission of IP and
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* ARP over FDDI Networks", says
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*
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* Command frames are identified by having the low order
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* bit of the SSAP address reset to zero. Response frames
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* have the low order bit of the SSAP address set to one.
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*
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* and a page I've seen seems to imply that's part of 802.2.)
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*/
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#define SSAP_CR_BIT 0x01
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/*
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* Mask to extrace the SAP number from the DSAP or the SSAP.
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*/
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#define SAP_MASK 0xFE
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/*
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* These are for SSAP and DSAP, wth last bit always zero.
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* XXX - some DSAPs come in separate "individual" and "group" versions,
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* with the last bit 0 and 1, respectively (e.g., LLC Sub-layer Management,
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* IBM SNA Path Control, IBM Net Management), but, whilst 0xFE is
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* the ISO Network Layer Protocol, 0xFF is the Global LSAP.
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*/
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const value_string sap_vals[] = {
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{ SAP_NULL, "NULL LSAP" },
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{ SAP_LLC_SLMGMT, "LLC Sub-Layer Management" },
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{ SAP_SNA_PATHCTRL, "SNA Path Control" },
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{ SAP_IP, "TCP/IP" },
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{ SAP_SNA1, "SNA" },
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{ SAP_SNA2, "SNA" },
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{ SAP_PROWAY_NM_INIT, "PROWAY (IEC955) Network Management and Initialization" },
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{ SAP_NETWARE1, "NetWare (unofficial?)" },
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{ SAP_OSINL1, "ISO Network Layer (OSLAN 1)" },
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{ SAP_TI, "Texas Instruments" },
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{ SAP_OSINL2, "ISO Network Layer (unofficial?)" },
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{ SAP_OSINL3, "ISO Network Layer (unofficial?)" },
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{ SAP_BPDU, "Spanning Tree BPDU" },
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{ SAP_RS511, "EIA RS-511 Manufacturing Message Service" },
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{ SAP_OSINL4, "ISO Network Layer (OSLAN 2)" },
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{ SAP_X25, "ISO 8208 (X.25 over 802.2)" },
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/*
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* XXX - setting the group bit of SAP_X25 make 0x7F; is this just
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* a group version of that?
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*/
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{ 0x7F, "ISO 802.2" },
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{ SAP_XNS, "XNS" },
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{ SAP_BACNET, "BACnet" },
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{ SAP_NESTAR, "Nestar" },
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{ SAP_PROWAY_ASLM, "PROWAY (IEC955) Active Station List Maintenance" },
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{ SAP_ARP, "ARP" }, /* XXX - hand to "dissect_arp()"? */
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{ SAP_HPJD, "HP JetDirect Printer" },
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{ SAP_SNAP, "SNAP" },
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{ SAP_VINES1, "Banyan Vines" },
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{ SAP_VINES2, "Banyan Vines" },
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{ SAP_NETWARE2, "NetWare" },
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{ SAP_NETBIOS, "NetBIOS" },
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{ SAP_IBMNM, "IBM Net Management" },
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{ SAP_HPEXT, "HP Extended LLC" },
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{ SAP_UB, "Ungermann-Bass" },
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{ SAP_RPL, "Remote Program Load" },
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{ SAP_OSINL5, "ISO Network Layer" },
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{ SAP_GLOBAL, "Global LSAP" },
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{ 0x00, NULL }
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};
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/*
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* See
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*
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* http://standards.ieee.org/regauth/oui/oui.txt
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*
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* http://www.cisco.com/univercd/cc/td/doc/product/lan/trsrb/vlan.htm
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*
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* for the PIDs for VTP and DRiP that go with an OUI of OUI_CISCO.
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*/
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const value_string oui_vals[] = {
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{ OUI_ENCAP_ETHER, "Encapsulated Ethernet" },
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{ OUI_XEROX, "Xerox" },
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/*
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http://www.cisco.com/univercd/cc/td/doc/product/software/ios113ed/113ed_cr/ibm_r/brprt1/brsrb.htm
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*/
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{ OUI_CISCO, "Cisco" },
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{ OUI_NORTEL, "Nortel Networks SONMP" },
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{ OUI_CISCO_90, "Cisco IOS 9.0 Compatible" },
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{ OUI_FORCE10, "Force10 Networks" },
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{ OUI_ERICSSON, "Ericsson Group" },
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{ OUI_CATENA, "Catena Networks" },
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{ OUI_SONY_ERICSSON, "Sony Ericsson Mobile Communications AB" },
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{ OUI_SONY_ERICSSON_2, "Sony Ericsson Mobile Communications AB" },
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{ OUI_PROFINET, "PROFIBUS Nutzerorganisation e.V." },
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{ OUI_SONY_ERICSSON_3, "Sony Ericsson Mobile Communications AB" },
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{ OUI_CIMETRICS, "Cimetrics" },
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{ OUI_IEEE_802_3, "IEEE 802.3" },
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{ OUI_MEDIA_ENDPOINT, "Media (TIA TR-41 Committee)" },
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{ OUI_SONY_ERICSSON_4, "Sony Ericsson Mobile Communications AB" },
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{ OUI_ERICSSON_MOBILE, "Ericsson Mobile Platforms" },
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{ OUI_SONY_ERICSSON_5, "Sony Ericsson Mobile Communications AB" },
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{ OUI_SONY_ERICSSON_6, "Sony Ericsson Mobile Communications AB" },
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{ OUI_SONY_ERICSSON_7, "Sony Ericsson Mobile Communications AB" },
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{ OUI_SONY_ERICSSON_8, "Sony Ericsson Mobile Communications AB" },
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{ OUI_TURBOCELL, "Karlnet (Turbocell)" },
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{ OUI_CISCOWL, "Cisco Wireless (Aironet) L2" },
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{ OUI_MARVELL, "Marvell Semiconductor" },
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{ OUI_ERICSSON_2, "Ericsson Group" },
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{ OUI_BRIDGED, "Frame Relay or ATM bridged frames" },
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{ OUI_IEEE_802_1, "IEEE 802.1 Committee" },
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{ OUI_ATM_FORUM, "ATM Forum" },
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{ OUI_EXTREME, "Extreme Networks" },
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/* RFC 2427, RFC 2684 */
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{ OUI_CABLE_BPDU, "DOCSIS Spanning Tree" }, /* DOCSIS spanning tree BPDU */
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{ OUI_SIEMENS, "Siemens AG" },
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{ OUI_APPLE_ATALK, "Apple (AppleTalk)" },
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{ OUI_HP, "Hewlett-Packard" },
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{ 0, NULL }
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};
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const value_string format_vals[] = {
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{ 0x81, "LLC basic format" },
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{ 0, NULL }
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};
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/*
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* Mask to extract the type from XID frame.
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*/
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#define TYPES_MASK 0x1F
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const value_string type_vals[] = {
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{ 1, "Type 1 LLC (Class I LLC)" },
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{ 2, "Type 2 LLC" },
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{ 3, "Type 1 and Type 2 LLCs (Class II LLC)" },
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{ 4, "Type 3 LLC" },
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{ 5, "Type 1 and Type 3 LLCs (Class III LLC)" },
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{ 6, "Type 2 and Type 3 LLCs" },
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{ 7, "Type 1 and Type 2 and Type 3 LLCs (Class IV LLC)" },
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{ 0, NULL }
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};
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/*
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* Hash table for translating OUIs to a dissector table/field info pair;
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* the dissector table maps PID values to dissectors, and the field
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* corresponds to the PID for that OUI.
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*/
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typedef struct {
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dissector_table_t table;
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hf_register_info *field_info;
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} oui_info_t;
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static GHashTable *oui_info_table = NULL;
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/*
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* Add an entry for a new OUI.
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*/
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void
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llc_add_oui(guint32 oui, const char *table_name, const char *table_ui_name,
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hf_register_info *hf_item)
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{
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oui_info_t *new_info;
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new_info = g_malloc(sizeof (oui_info_t));
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new_info->table = register_dissector_table(table_name,
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table_ui_name, FT_UINT16, BASE_HEX);
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new_info->field_info = hf_item;
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/*
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* Create the hash table for OUI information, if it doesn't
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* already exist.
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*/
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if (oui_info_table == NULL) {
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oui_info_table = g_hash_table_new(g_direct_hash,
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g_direct_equal);
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}
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g_hash_table_insert(oui_info_table, GUINT_TO_POINTER(oui), new_info);
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}
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void
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capture_llc(const guchar *pd, int offset, int len, packet_counts *ld) {
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int is_snap;
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guint16 control;
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int llc_header_len;
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if (!BYTES_ARE_IN_FRAME(offset, len, 2)) {
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ld->other++;
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return;
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}
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is_snap = (pd[offset] == SAP_SNAP) && (pd[offset+1] == SAP_SNAP);
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llc_header_len = 2; /* DSAP + SSAP */
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/*
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* XXX - the page referred to in the comment above about the
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* Command/Response bit also implies that LLC Type 2 always
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* uses extended operation, so we don't need to determine
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* whether it's basic or extended operation; is that the case?
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*/
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control = get_xdlc_control(pd, offset+2, pd[offset+1] & SSAP_CR_BIT);
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llc_header_len += XDLC_CONTROL_LEN(control, TRUE);
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if (!BYTES_ARE_IN_FRAME(offset, len, llc_header_len)) {
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ld->other++;
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return;
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}
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if (!XDLC_IS_INFORMATION(control)) {
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ld->other++;
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return;
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}
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if (is_snap)
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capture_snap(pd, offset+3, len, ld);
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else {
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/* non-SNAP */
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switch (pd[offset]) {
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case SAP_IP:
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capture_ip(pd, offset + llc_header_len, len, ld);
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break;
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case SAP_NETWARE1:
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case SAP_NETWARE2:
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capture_ipx(ld);
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break;
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case SAP_NETBIOS:
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capture_netbios(ld);
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break;
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case SAP_VINES1:
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case SAP_VINES2:
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capture_vines(ld);
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break;
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default:
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ld->other++;
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break;
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}
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}
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}
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void
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capture_snap(const guchar *pd, int offset, int len, packet_counts *ld)
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{
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guint32 oui;
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guint16 etype;
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if (!BYTES_ARE_IN_FRAME(offset, len, 5)) {
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ld->other++;
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return;
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}
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oui = pd[offset] << 16 | pd[offset+1] << 8 | pd[offset+2];
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etype = pntohs(&pd[offset+3]);
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switch (oui) {
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case OUI_ENCAP_ETHER:
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case OUI_CISCO_90:
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case OUI_APPLE_ATALK:
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/* No, I have no idea why Apple used
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one of their own OUIs, rather than
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OUI_ENCAP_ETHER, and an Ethernet
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packet type as protocol ID, for
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AppleTalk data packets - but used
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OUI_ENCAP_ETHER and an Ethernet
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packet type for AARP packets. */
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capture_ethertype(etype, pd, offset+5, len, ld);
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break;
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case OUI_CISCO:
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capture_ethertype(etype, pd, offset+5, len, ld);
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break;
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default:
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ld->other++;
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break;
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}
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}
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/* Used only for U frames */
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static const xdlc_cf_items llc_cf_items = {
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NULL,
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NULL,
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&hf_llc_p,
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&hf_llc_f,
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NULL,
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&hf_llc_u_modifier_cmd,
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&hf_llc_u_modifier_resp,
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NULL,
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&hf_llc_ftype_s_u
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};
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/* Used only for I and S frames */
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static const xdlc_cf_items llc_cf_items_ext = {
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&hf_llc_n_r,
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&hf_llc_n_s,
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&hf_llc_p_ext,
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&hf_llc_f_ext,
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&hf_llc_s_ftype,
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NULL,
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NULL,
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&hf_llc_ftype_i,
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&hf_llc_ftype_s_u_ext
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};
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static void
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dissect_basicxid(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
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{
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proto_tree *xid_tree = NULL;
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proto_item *ti = NULL;
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guint8 format, types, wsize;
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if (check_col(pinfo->cinfo, COL_PROTOCOL)) {
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "XID");
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}
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if (check_col(pinfo->cinfo, COL_INFO)) {
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col_clear(pinfo->cinfo, COL_INFO);
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}
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format = tvb_get_guint8(tvb, 0);
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if (tree) {
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ti = proto_tree_add_item(tree, proto_basicxid, tvb, 0, -1, FALSE);
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xid_tree = proto_item_add_subtree(ti, ett_llc_basicxid);
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proto_tree_add_uint(xid_tree, hf_llc_xid_format, tvb, 0,
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1, format);
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} else
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xid_tree = NULL;
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if (check_col(pinfo->cinfo, COL_INFO)) {
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col_append_str(pinfo->cinfo, COL_INFO,
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"Basic Format");
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}
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types = tvb_get_guint8(tvb, 1);
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if (tree) {
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proto_tree_add_uint(xid_tree, hf_llc_xid_types, tvb, 1,
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1, types & TYPES_MASK);
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}
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if (check_col(pinfo->cinfo, COL_INFO)) {
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col_append_fstr(pinfo->cinfo, COL_INFO,
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"; %s", val_to_str(types & TYPES_MASK, type_vals, "0x%02x")
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);
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}
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wsize = tvb_get_guint8(tvb, 2);
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if (tree) {
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proto_tree_add_uint(xid_tree, hf_llc_xid_wsize, tvb, 2,
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1, (wsize & 0xFE) >> 1);
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}
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if (check_col(pinfo->cinfo, COL_INFO)) {
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col_append_fstr(pinfo->cinfo, COL_INFO,
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"; Window Size %d", (wsize & 0xFE) >> 1);
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}
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}
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static void
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dissect_llc(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
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{
|
|
proto_tree *llc_tree = NULL;
|
|
proto_item *ti = NULL;
|
|
int is_snap;
|
|
guint16 control;
|
|
int llc_header_len;
|
|
guint8 dsap, ssap, format;
|
|
tvbuff_t *next_tvb;
|
|
|
|
if (check_col(pinfo->cinfo, COL_PROTOCOL)) {
|
|
col_set_str(pinfo->cinfo, COL_PROTOCOL, "LLC");
|
|
}
|
|
if (check_col(pinfo->cinfo, COL_INFO)) {
|
|
col_clear(pinfo->cinfo, COL_INFO);
|
|
}
|
|
|
|
dsap = tvb_get_guint8(tvb, 0);
|
|
if (tree) {
|
|
ti = proto_tree_add_item(tree, proto_llc, tvb, 0, -1, FALSE);
|
|
llc_tree = proto_item_add_subtree(ti, ett_llc);
|
|
proto_tree_add_uint(llc_tree, hf_llc_dsap, tvb, 0,
|
|
1, dsap & SAP_MASK);
|
|
proto_tree_add_boolean(llc_tree, hf_llc_dsap_ig, tvb, 0,
|
|
1, dsap & DSAP_GI_BIT);
|
|
} else
|
|
llc_tree = NULL;
|
|
|
|
ssap = tvb_get_guint8(tvb, 1);
|
|
if (tree) {
|
|
proto_tree_add_uint(llc_tree, hf_llc_ssap, tvb, 1,
|
|
1, ssap & SAP_MASK);
|
|
proto_tree_add_boolean(llc_tree, hf_llc_ssap_cr, tvb, 1,
|
|
1, ssap & SSAP_CR_BIT);
|
|
} else
|
|
llc_tree = NULL;
|
|
|
|
is_snap = (dsap == SAP_SNAP) && (ssap == SAP_SNAP);
|
|
llc_header_len = 2; /* DSAP + SSAP */
|
|
|
|
/*
|
|
* XXX - the page referred to in the comment above about the
|
|
* Command/Response bit also implies that LLC Type 2 always
|
|
* uses extended operation, so we don't need to determine
|
|
* whether it's basic or extended operation; is that the case?
|
|
*/
|
|
control = dissect_xdlc_control(tvb, 2, pinfo, llc_tree,
|
|
hf_llc_ctrl, ett_llc_ctrl,
|
|
&llc_cf_items, &llc_cf_items_ext,
|
|
NULL, NULL, ssap & SSAP_CR_BIT, TRUE, FALSE);
|
|
llc_header_len += XDLC_CONTROL_LEN(control, TRUE);
|
|
if (is_snap)
|
|
llc_header_len += 5; /* 3 bytes of OUI, 2 bytes of protocol ID */
|
|
|
|
if (tree)
|
|
proto_item_set_len(ti, llc_header_len);
|
|
|
|
if (is_snap) {
|
|
dissect_snap(tvb, 3, pinfo, tree, llc_tree, control,
|
|
hf_llc_oui, hf_llc_type, hf_llc_pid, 2);
|
|
}
|
|
else {
|
|
if (check_col(pinfo->cinfo, COL_INFO)) {
|
|
col_append_fstr(pinfo->cinfo, COL_INFO,
|
|
"; DSAP %s %s, SSAP %s %s",
|
|
val_to_str(dsap & SAP_MASK, sap_vals, "0x%02x"),
|
|
dsap & DSAP_GI_BIT ?
|
|
"Group" : "Individual",
|
|
val_to_str(ssap & SAP_MASK, sap_vals, "0x%02x"),
|
|
ssap & SSAP_CR_BIT ?
|
|
"Response" : "Command"
|
|
);
|
|
}
|
|
|
|
if (tvb_length_remaining(tvb, llc_header_len) > 0) {
|
|
next_tvb = tvb_new_subset(tvb, llc_header_len, -1, -1);
|
|
if (XDLC_IS_INFORMATION(control)) {
|
|
/*
|
|
* Non-SNAP I or UI frame.
|
|
* Try the regular LLC subdissector table
|
|
* with the DSAP.
|
|
*/
|
|
if (!dissector_try_port(subdissector_table,
|
|
dsap, next_tvb, pinfo, tree)) {
|
|
call_dissector(data_handle, next_tvb,
|
|
pinfo, tree);
|
|
}
|
|
} else if ((control & (XDLC_U_MODIFIER_MASK|XDLC_U))
|
|
== (XDLC_XID|XDLC_U)) {
|
|
/*
|
|
* Non-SNAP XID frame.
|
|
* Test for LLC basic format first
|
|
*/
|
|
format = tvb_get_guint8(next_tvb, 0);
|
|
if (format == 0x81) {
|
|
dissect_basicxid(next_tvb, pinfo, tree);
|
|
} else {
|
|
/*
|
|
* Try the XID LLC subdissector table
|
|
* with the DSAP.
|
|
*/
|
|
if (!dissector_try_port(
|
|
xid_subdissector_table, dsap, next_tvb,
|
|
pinfo, tree)) {
|
|
call_dissector(data_handle,
|
|
next_tvb, pinfo, tree);
|
|
}
|
|
}
|
|
} else {
|
|
call_dissector(data_handle, next_tvb, pinfo,
|
|
tree);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Dissect SNAP header; used elsewhere, e.g. in the Frame Relay dissector.
|
|
*/
|
|
void
|
|
dissect_snap(tvbuff_t *tvb, int offset, packet_info *pinfo, proto_tree *tree,
|
|
proto_tree *snap_tree, int control, int hf_oui, int hf_type, int hf_pid,
|
|
int bridge_pad)
|
|
{
|
|
guint32 oui;
|
|
guint16 etype;
|
|
tvbuff_t *next_tvb;
|
|
oui_info_t *oui_info;
|
|
dissector_table_t subdissector_table;
|
|
int hf;
|
|
|
|
/*
|
|
* XXX - what about non-UI frames?
|
|
*/
|
|
oui = tvb_get_ntoh24(tvb, offset);
|
|
etype = tvb_get_ntohs(tvb, offset+3);
|
|
|
|
if (check_col(pinfo->cinfo, COL_INFO)) {
|
|
col_append_fstr(pinfo->cinfo, COL_INFO,
|
|
"; SNAP, OUI 0x%06X (%s), PID 0x%04X",
|
|
oui, val_to_str(oui, oui_vals, "Unknown"), etype);
|
|
}
|
|
if (tree) {
|
|
proto_tree_add_uint(snap_tree, hf_oui, tvb, offset, 3, oui);
|
|
}
|
|
|
|
switch (oui) {
|
|
|
|
case OUI_ENCAP_ETHER:
|
|
case OUI_CISCO_90:
|
|
case OUI_APPLE_ATALK:
|
|
/* No, I have no idea why Apple used
|
|
one of their own OUIs, rather than
|
|
OUI_ENCAP_ETHER, and an Ethernet
|
|
packet type as protocol ID, for
|
|
AppleTalk data packets - but used
|
|
OUI_ENCAP_ETHER and an Ethernet
|
|
packet type for AARP packets. */
|
|
if (XDLC_IS_INFORMATION(control)) {
|
|
ethertype(etype, tvb, offset+5,
|
|
pinfo, tree, snap_tree, hf_type, -1, 0);
|
|
} else {
|
|
next_tvb = tvb_new_subset(tvb, offset+5, -1, -1);
|
|
call_dissector(data_handle,next_tvb, pinfo, tree);
|
|
}
|
|
break;
|
|
|
|
case OUI_BRIDGED:
|
|
/*
|
|
* MAC frames bridged over ATM (RFC 2684) or Frame Relay
|
|
* (RFC 2427).
|
|
*
|
|
* We have to figure out how much padding to put
|
|
* into the frame. We were handed a "bridge_pad"
|
|
* argument which should be 0 for Frame Relay and
|
|
* 2 for ATM; we add to that the amount of padding
|
|
* common to both bridging types.
|
|
*/
|
|
if (tree) {
|
|
proto_tree_add_uint(snap_tree, hf_pid, tvb, offset+3, 2,
|
|
etype);
|
|
}
|
|
|
|
switch (etype) {
|
|
|
|
case BPID_ETH_WITH_FCS:
|
|
next_tvb = tvb_new_subset(tvb, offset+5+bridge_pad,
|
|
-1, -1);
|
|
call_dissector(eth_withfcs_handle, next_tvb, pinfo,
|
|
tree);
|
|
break;
|
|
|
|
case BPID_ETH_WITHOUT_FCS:
|
|
next_tvb = tvb_new_subset(tvb, offset+5+bridge_pad,
|
|
-1, -1);
|
|
call_dissector(eth_withoutfcs_handle, next_tvb, pinfo, tree);
|
|
break;
|
|
|
|
case BPID_802_5_WITH_FCS:
|
|
case BPID_802_5_WITHOUT_FCS:
|
|
/*
|
|
* We treat the last padding byte as the Access
|
|
* Control byte, as that's what the Token
|
|
* Ring dissector expects the first byte to
|
|
* be.
|
|
*/
|
|
next_tvb = tvb_new_subset(tvb, offset+5+bridge_pad,
|
|
-1, -1);
|
|
call_dissector(tr_handle, next_tvb, pinfo, tree);
|
|
break;
|
|
|
|
case BPID_FDDI_WITH_FCS:
|
|
case BPID_FDDI_WITHOUT_FCS:
|
|
next_tvb = tvb_new_subset(tvb, offset+5+1+bridge_pad,
|
|
-1, -1);
|
|
call_dissector(fddi_handle, next_tvb, pinfo, tree);
|
|
break;
|
|
|
|
case BPID_BPDU:
|
|
next_tvb = tvb_new_subset(tvb, offset+5, -1, -1);
|
|
call_dissector(bpdu_handle, next_tvb, pinfo, tree);
|
|
break;
|
|
|
|
default:
|
|
next_tvb = tvb_new_subset(tvb, offset+5, -1, -1);
|
|
call_dissector(data_handle,next_tvb, pinfo, tree);
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case OUI_CABLE_BPDU: /* DOCSIS cable modem spanning tree BPDU */
|
|
if (tree) {
|
|
proto_tree_add_uint(snap_tree, hf_pid, tvb, offset+3, 2,
|
|
etype);
|
|
}
|
|
next_tvb = tvb_new_subset(tvb, offset+5, -1, -1);
|
|
call_dissector(bpdu_handle, next_tvb, pinfo, tree);
|
|
break;
|
|
|
|
case OUI_TURBOCELL:
|
|
next_tvb = tvb_new_subset(tvb, offset+3, -1, -1);
|
|
call_dissector(turbo_handle, next_tvb, pinfo, tree);
|
|
break;
|
|
|
|
default:
|
|
/*
|
|
* Do we have information for this OUI?
|
|
*/
|
|
if (oui_info_table != NULL &&
|
|
(oui_info =
|
|
g_hash_table_lookup(oui_info_table,
|
|
GUINT_TO_POINTER(oui))) != NULL) {
|
|
/*
|
|
* Yes - use it.
|
|
*/
|
|
hf = *oui_info->field_info->p_id;
|
|
subdissector_table = oui_info->table;
|
|
} else {
|
|
/*
|
|
* No, use hf_pid for the PID and just dissect
|
|
* the payload as data.
|
|
*/
|
|
hf = hf_pid;
|
|
subdissector_table = NULL;
|
|
}
|
|
if (tree) {
|
|
proto_tree_add_uint(snap_tree, hf, tvb, offset+3, 2,
|
|
etype);
|
|
}
|
|
next_tvb = tvb_new_subset(tvb, offset+5, -1, -1);
|
|
if (XDLC_IS_INFORMATION(control)) {
|
|
if (subdissector_table != NULL) {
|
|
/* do lookup with the subdissector table */
|
|
if (dissector_try_port(subdissector_table,
|
|
etype, next_tvb, pinfo, tree))
|
|
break;
|
|
}
|
|
}
|
|
call_dissector(data_handle, next_tvb, pinfo, tree);
|
|
break;
|
|
}
|
|
}
|
|
|
|
void
|
|
proto_register_llc(void)
|
|
{
|
|
static struct true_false_string ig_bit = { "Group", "Individual" };
|
|
static struct true_false_string cr_bit = { "Response", "Command" };
|
|
|
|
static hf_register_info hf[] = {
|
|
{ &hf_llc_dsap,
|
|
{ "DSAP", "llc.dsap", FT_UINT8, BASE_HEX,
|
|
VALS(sap_vals), 0x0, "DSAP - 7 Most Significant Bits only", HFILL }},
|
|
|
|
{ &hf_llc_dsap_ig,
|
|
{ "IG Bit", "llc.dsap.ig", FT_BOOLEAN, BASE_HEX,
|
|
&ig_bit, 0x0, "Individual/Group - Least Significant Bit only", HFILL }},
|
|
|
|
{ &hf_llc_ssap,
|
|
{ "SSAP", "llc.ssap", FT_UINT8, BASE_HEX,
|
|
VALS(sap_vals), 0x0, "SSAP - 7 Most Significant Bits only", HFILL }},
|
|
|
|
{ &hf_llc_ssap_cr,
|
|
{ "CR Bit", "llc.ssap.cr", FT_BOOLEAN, BASE_HEX,
|
|
&cr_bit, 0x0, "Command/Response - Least Significant Bit only", HFILL }},
|
|
|
|
{ &hf_llc_ctrl,
|
|
{ "Control", "llc.control", FT_UINT16, BASE_HEX,
|
|
NULL, 0x0, "", HFILL }},
|
|
|
|
{ &hf_llc_n_r,
|
|
{ "N(R)", "llc.control.n_r", FT_UINT16, BASE_DEC,
|
|
NULL, XDLC_N_R_EXT_MASK, "", HFILL }},
|
|
|
|
{ &hf_llc_n_s,
|
|
{ "N(S)", "llc.control.n_s", FT_UINT16, BASE_DEC,
|
|
NULL, XDLC_N_S_EXT_MASK, "", HFILL }},
|
|
|
|
{ &hf_llc_p,
|
|
{ "Poll", "llc.control.p", FT_BOOLEAN, 8,
|
|
TFS(&flags_set_truth), XDLC_P_F, "", HFILL }},
|
|
|
|
{ &hf_llc_p_ext,
|
|
{ "Poll", "llc.control.p", FT_BOOLEAN, 16,
|
|
TFS(&flags_set_truth), XDLC_P_F_EXT, "", HFILL }},
|
|
|
|
{ &hf_llc_f,
|
|
{ "Final", "llc.control.f", FT_BOOLEAN, 8,
|
|
TFS(&flags_set_truth), XDLC_P_F, "", HFILL }},
|
|
|
|
{ &hf_llc_f_ext,
|
|
{ "Final", "llc.control.f", FT_BOOLEAN, 16,
|
|
TFS(&flags_set_truth), XDLC_P_F_EXT, "", HFILL }},
|
|
|
|
{ &hf_llc_s_ftype,
|
|
{ "Supervisory frame type", "llc.control.s_ftype", FT_UINT16, BASE_HEX,
|
|
VALS(stype_vals), XDLC_S_FTYPE_MASK, "", HFILL }},
|
|
|
|
{ &hf_llc_u_modifier_cmd,
|
|
{ "Command", "llc.control.u_modifier_cmd", FT_UINT8, BASE_HEX,
|
|
VALS(modifier_vals_cmd), XDLC_U_MODIFIER_MASK, "", HFILL }},
|
|
|
|
{ &hf_llc_u_modifier_resp,
|
|
{ "Response", "llc.control.u_modifier_resp", FT_UINT8, BASE_HEX,
|
|
VALS(modifier_vals_resp), XDLC_U_MODIFIER_MASK, "", HFILL }},
|
|
|
|
{ &hf_llc_ftype_i,
|
|
{ "Frame type", "llc.control.ftype", FT_UINT16, BASE_HEX,
|
|
VALS(ftype_vals), XDLC_I_MASK, "", HFILL }},
|
|
|
|
{ &hf_llc_ftype_s_u,
|
|
{ "Frame type", "llc.control.ftype", FT_UINT8, BASE_HEX,
|
|
VALS(ftype_vals), XDLC_S_U_MASK, "", HFILL }},
|
|
|
|
{ &hf_llc_ftype_s_u_ext,
|
|
{ "Frame type", "llc.control.ftype", FT_UINT16, BASE_HEX,
|
|
VALS(ftype_vals), XDLC_S_U_MASK, "", HFILL }},
|
|
|
|
/* registered here but handled in ethertype.c */
|
|
{ &hf_llc_type,
|
|
{ "Type", "llc.type", FT_UINT16, BASE_HEX,
|
|
VALS(etype_vals), 0x0, "", HFILL }},
|
|
|
|
{ &hf_llc_oui,
|
|
{ "Organization Code", "llc.oui", FT_UINT24, BASE_HEX,
|
|
VALS(oui_vals), 0x0, "", HFILL }},
|
|
|
|
{ &hf_llc_pid,
|
|
{ "Protocol ID", "llc.pid", FT_UINT16, BASE_HEX,
|
|
NULL, 0x0, "", HFILL }},
|
|
};
|
|
static gint *ett[] = {
|
|
&ett_llc,
|
|
&ett_llc_ctrl,
|
|
};
|
|
|
|
proto_llc = proto_register_protocol("Logical-Link Control", "LLC", "llc");
|
|
proto_register_field_array(proto_llc, hf, array_length(hf));
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
|
|
/* subdissector code */
|
|
subdissector_table = register_dissector_table("llc.dsap",
|
|
"LLC SAP", FT_UINT8, BASE_HEX);
|
|
xid_subdissector_table = register_dissector_table("llc.xid_dsap",
|
|
"LLC XID SAP", FT_UINT8, BASE_HEX);
|
|
|
|
register_dissector("llc", dissect_llc, proto_llc);
|
|
}
|
|
|
|
void
|
|
proto_register_basicxid(void)
|
|
{
|
|
static hf_register_info hf[] = {
|
|
{ &hf_llc_xid_format,
|
|
{ "XID Format", "basicxid.llc.xid.format", FT_UINT8, BASE_HEX,
|
|
VALS(format_vals), 0x0, "", HFILL }},
|
|
|
|
{ &hf_llc_xid_types,
|
|
{ "LLC Types/Classes", "basicxid.llc.xid.types", FT_UINT8, BASE_HEX,
|
|
VALS(type_vals), 0x0, "", HFILL }},
|
|
|
|
{ &hf_llc_xid_wsize,
|
|
{ "Receive Window Size", "basicxid.llc.xid.wsize", FT_UINT8, BASE_DEC,
|
|
NULL, 0x0, "", HFILL }},
|
|
};
|
|
static gint *ett[] = {
|
|
&ett_llc_basicxid,
|
|
};
|
|
|
|
proto_basicxid = proto_register_protocol("Logical-Link Control Basic Format XID", "Basic Format XID", "basicxid");
|
|
proto_register_field_array(proto_basicxid, hf, array_length(hf));
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
|
|
register_dissector("basicxid", dissect_basicxid, proto_basicxid);
|
|
}
|
|
|
|
static void
|
|
register_hf(gpointer key _U_, gpointer value, gpointer user_data _U_)
|
|
{
|
|
oui_info_t *info = value;
|
|
|
|
proto_register_field_array(proto_llc, info->field_info, 1);
|
|
}
|
|
|
|
void
|
|
proto_reg_handoff_llc(void)
|
|
{
|
|
dissector_handle_t llc_handle;
|
|
|
|
/*
|
|
* Get handles for the BPDU, Ethernet, FDDI, Token Ring and
|
|
* Turbocell dissectors.
|
|
*/
|
|
bpdu_handle = find_dissector("bpdu");
|
|
eth_withoutfcs_handle = find_dissector("eth_withoutfcs");
|
|
eth_withfcs_handle = find_dissector("eth_withfcs");
|
|
fddi_handle = find_dissector("fddi");
|
|
tr_handle = find_dissector("tr");
|
|
turbo_handle = find_dissector("turbocell");
|
|
data_handle = find_dissector("data");
|
|
|
|
llc_handle = find_dissector("llc");
|
|
dissector_add("wtap_encap", WTAP_ENCAP_ATM_RFC1483, llc_handle);
|
|
/* RFC 2043 */
|
|
dissector_add("ppp.protocol", PPP_LLC, llc_handle);
|
|
/* RFC 2353 */
|
|
dissector_add("udp.port", UDP_PORT_LLC1, llc_handle);
|
|
dissector_add("udp.port", UDP_PORT_LLC2, llc_handle);
|
|
dissector_add("udp.port", UDP_PORT_LLC3, llc_handle);
|
|
dissector_add("udp.port", UDP_PORT_LLC4, llc_handle);
|
|
dissector_add("udp.port", UDP_PORT_LLC5, llc_handle);
|
|
/* IP-over-FC when we have the full FC frame */
|
|
dissector_add("fc.ftype", FC_FTYPE_IP, llc_handle);
|
|
|
|
/*
|
|
* BACNET-over-ARCNET is really BACNET-over-802.2 LLC-over-ARCNET,
|
|
* apparently.
|
|
*/
|
|
dissector_add("arcnet.protocol_id", ARCNET_PROTO_BACNET, llc_handle);
|
|
|
|
/*
|
|
* Register all the fields for PIDs for various OUIs.
|
|
*/
|
|
if (oui_info_table != NULL)
|
|
g_hash_table_foreach(oui_info_table, register_hf, NULL);
|
|
}
|