![Guy Harris](/assets/img/avatar_default.png)
dissector, and have the LLC dissector register itself as the dissector for IP-over-FC frames, as the payload is just an LLC 802.2 header plus payload for the protocol specified by that header. In the dissector for IP-over-FC as a Wiretap link-layer type, have its top-level item be a protocol item rather than a text item, and don't register it as the dissector for IP-over-FC frames from the FC dissector - it assumes what it's handed includes the Network_Header, but for full FC frames, the FC dissector has already consumed the Network_Header. Move the definitions of the value_string tables out of the header file; most of them are used only in one file, so define them in that file, and for "fc_fc4_val", define it in "packet-fc.c", make it not static, and declare it in "packet-fc.h". Use FALSE, rather than 0, as the last argument to "proto_tree_add_item()" calls that add a big-endian value. Fix one "proto_tree_add_uint()" call that was supposed to be a "proto_tree_add_item()" call. Use "%u", not "%d", to display unsigned values. svn path=/trunk/; revision=6773
866 lines
29 KiB
C
866 lines
29 KiB
C
/* packet-fc.c
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* Routines for Fibre Channel Decoding (FC Header, Link Ctl & Basic Link Svc)
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* Copyright 2001, Dinesh G Dutt <ddutt@cisco.com>
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*
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* $Id: packet-fc.c,v 1.2 2002/12/10 02:49:31 guy Exp $
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*
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* Ethereal - Network traffic analyzer
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* By Gerald Combs <gerald@ethereal.com>
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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 <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#ifdef HAVE_SYS_TYPES_H
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# include <sys/types.h>
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#endif
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#ifdef HAVE_NETINET_IN_H
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# include <netinet/in.h>
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#endif
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#include <glib.h>
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#ifdef NEED_SNPRINTF_H
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# include "snprintf.h"
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#endif
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#include <epan/packet.h>
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#include "prefs.h"
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#include "reassemble.h"
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#include "etypes.h"
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#include "packet-fc.h"
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#include "packet-fclctl.h"
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#include "packet-fcbls.h"
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#define FC_HEADER_SIZE 24
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#define FC_RCTL_EISL 0x50
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/* Size of various fields in FC header in bytes */
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#define FC_RCTL_SIZE 1
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#define FC_DID_SIZE 3
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#define FC_CSCTL_SIZE 1
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#define FC_SID_SIZE 3
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#define FC_TYPE_SIZE 1
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#define FC_FCTL_SIZE 3
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#define FC_SEQID_SIZE 1
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#define FC_DFCTL_SIZE 1
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#define FC_SEQCNT_SIZE 2
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#define FC_OXID_SIZE 2
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#define FC_RXID_SIZE 2
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#define FC_PARAM_SIZE 4
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/* Initialize the protocol and registered fields */
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static int proto_fc = -1;
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static int hf_fc_rctl = -1;
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static int hf_fc_did = -1;
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static int hf_fc_csctl = -1;
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static int hf_fc_sid = -1;
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static int hf_fc_type = -1;
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static int hf_fc_fctl = -1;
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static int hf_fc_seqid = -1;
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static int hf_fc_dfctl = -1;
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static int hf_fc_seqcnt = -1;
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static int hf_fc_oxid = -1;
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static int hf_fc_rxid = -1;
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static int hf_fc_param = -1;
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static int hf_fc_ftype = -1; /* Derived field, non-existent in FC hdr */
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static int hf_fc_exchg_orig = -1;
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static int hf_fc_exchg_resp = -1;
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static int hf_fc_reassembled = -1;
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/* Network_Header fields */
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static int hf_fc_nh_da = -1;
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static int hf_fc_nh_sa = -1;
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/* For Basic Link Svc */
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static int hf_fc_bls_seqid_vld = -1;
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static int hf_fc_bls_lastvld_seqid = -1;
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static int hf_fc_bls_oxid = -1;
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static int hf_fc_bls_rxid = -1;
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static int hf_fc_bls_lowseqcnt = -1;
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static int hf_fc_bls_hiseqcnt = -1;
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static int hf_fc_bls_rjtcode = -1;
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static int hf_fc_bls_rjtdetail = -1;
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static int hf_fc_bls_vendor = -1;
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/* Initialize the subtree pointers */
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static gint ett_fc = -1;
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static gint ett_fcbls = -1;
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static dissector_table_t fcftype_dissector_table;
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static dissector_handle_t data_handle;
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/* Reassembly stuff */
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static gboolean fc_reassemble = TRUE;
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static guint32 fc_max_frame_size = 1024;
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static GHashTable *fc_fragment_table = NULL;
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const value_string fc_fc4_val[] = {
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{FC_TYPE_ELS , "Ext Link Svc"},
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{FC_TYPE_LLCSNAP , "LLC_SNAP"},
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{FC_TYPE_IP , "IP/FC"},
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{FC_TYPE_SCSI , "FCP"},
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{FC_TYPE_FCCT , "FC_CT"},
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{FC_TYPE_SWILS , "SW_ILS"},
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{FC_TYPE_AL , "AL"},
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{FC_TYPE_SNMP , "SNMP"},
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{0, NULL},
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};
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static const value_string fc_ftype_vals [] = {
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{FC_FTYPE_UNDEF , "Unknown frame"},
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{FC_FTYPE_SWILS, "SW_ILS"},
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{FC_FTYPE_IP , "IP/FC"},
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{FC_FTYPE_SCSI , "FCP"},
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{FC_FTYPE_BLS , "Basic Link Svc"},
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{FC_FTYPE_ELS , "ELS"},
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{FC_FTYPE_FCCT , "FC_CT"},
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{FC_FTYPE_LINKDATA, "Link Data"},
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{FC_FTYPE_VDO, "Video Data"},
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{FC_FTYPE_LINKCTL, "Link Ctl"},
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{0, NULL},
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};
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static const value_string fc_wka_vals[] = {
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{FC_WKA_MULTICAST, "Multicast Server"},
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{FC_WKA_CLKSYNC, "Clock Sync Server"},
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{FC_WKA_KEYDIST, "Key Distribution Server"},
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{FC_WKA_ALIAS, "Alias Server"},
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{FC_WKA_QOSF, "QoS Facilitator"},
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{FC_WKA_MGMT, "Management Server"},
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{FC_WKA_TIME, "Time Server"},
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{FC_WKA_DNS, "Directory Server"},
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{FC_WKA_FABRIC_CTRLR, "Fabric Ctlr"},
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{FC_WKA_FPORT, "F_Port Server"},
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{FC_WKA_BCAST, "Broadcast ID"},
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{0, NULL},
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};
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static const value_string fc_iu_val[] = {
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{FC_IU_UNCATEGORIZED , "Uncategorized Data"},
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{FC_IU_SOLICITED_DATA , "Solicited Data"},
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{FC_IU_UNSOLICITED_CTL , "Unsolicited Control"},
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{FC_IU_SOLICITED_CTL , "Solicited Control"},
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{FC_IU_UNSOLICITED_DATA, "Solicited Data"},
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{FC_IU_DATA_DESCRIPTOR , "Data Descriptor"},
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{FC_IU_UNSOLICITED_CMD , "Unsolicited Command"},
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{FC_IU_CMD_STATUS , "Command Status"},
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{0, NULL},
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};
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static void fc_defragment_init(void)
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{
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fragment_table_init(&fc_fragment_table);
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}
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static gchar *
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fctl_to_str (const guint8 *fctl, gchar *str, gboolean is_ack)
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{
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int stroff = 0;
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guint8 tmp = 0;
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if (str == NULL)
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return (str);
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if (fctl[0] & 0x80) {
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strcpy (str, "Exchange Responder, ");
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stroff += 20;
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}
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else {
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strcpy (str, "Exchange Originator, ");
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stroff += 21;
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}
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if (fctl[0] & 0x40) {
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strcpy (&str[stroff], "Seq Recipient, ");
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stroff += 15;
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}
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else {
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strcpy (&str[stroff], "Seq Initiator, ");
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stroff += 15;
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}
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if (fctl[0] & 0x20) {
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strcpy (&str[stroff], "Exchg First, ");
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stroff += 13;
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}
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if (fctl[0] & 0x10) {
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strcpy (&str[stroff], "Exchg Last, ");
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stroff += 12;
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}
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if (fctl[0] & 0x8) {
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strcpy (&str[stroff], "Seq Last, ");
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stroff += 10;
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}
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if (fctl[0] & 0x2) {
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strcpy (&str[stroff], "Priority, ");
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stroff += 10;
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}
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else {
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strcpy (&str[stroff], "CS_CTL, ");
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stroff += 8;
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}
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if (fctl[0] & 0x1) {
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strcpy (&str[stroff], "Transfer Seq Initiative, ");
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stroff += 25;
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}
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if (fctl[1] & 0x30) {
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strcpy (&str[stroff], "ACK_0 Reqd, ");
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stroff += 12;
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}
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else if (fctl[1] & 0x10) {
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strcpy (&str[stroff], "ACK_1 Reqd, ");
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stroff += 12;
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}
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if (fctl[1] & 0x2) {
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strcpy (&str[stroff], "Rexmitted Seq, ");
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stroff += 15;
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}
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tmp = fctl[2] & 0xC0;
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switch (tmp) {
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case 0:
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strcpy (&str[stroff], "Last Data Frame - No Info, ");
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stroff += 27;
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break;
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case 1:
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strcpy (&str[stroff], "Last Data Frame - Seq Imm, ");
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stroff += 27;
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break;
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case 2:
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strcpy (&str[stroff], "Last Data Frame - Seq Soon, ");
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stroff += 28;
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break;
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case 3:
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strcpy (&str[stroff], "Last Data Frame - Seq Delyd, ");
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stroff += 29;
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break;
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}
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tmp = fctl[2] & 0x30;
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switch (tmp) {
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case 0:
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if (is_ack) {
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strcpy (&str[stroff], "ABTS - Cont, ");
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stroff += 13;
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}
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else {
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strcpy (&str[stroff], "ABTS - Abort/MS, ");
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stroff += 17;
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}
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break;
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case 0x10:
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if (is_ack) {
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strcpy (&str[stroff], "ABTS - Abort, ");
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stroff += 14;
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}
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else {
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strcpy (&str[stroff], "ABTS - Abort/SS, ");
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stroff += 17;
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}
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break;
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case 0x20:
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if (is_ack) {
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strcpy (&str[stroff], "ABTS - Stop, ");
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stroff += 13;
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}
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else {
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strcpy (&str[stroff], "ABTS - Process/IB, ");
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stroff += 19;
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}
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break;
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case 0x30:
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if (is_ack) {
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strcpy (&str[stroff], "ABTS - Imm Seq Retx, ");
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stroff += 21;
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}
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else {
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strcpy (&str[stroff], "ABTS - Discard/MS/Imm Retx, ");
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stroff += 28;
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}
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break;
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}
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if (fctl[2] & 0x8) {
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strcpy (&str[stroff], "Rel Offset = 1");
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stroff += 14;
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}
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return (str);
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}
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/* BA_ACC & BA_RJT are decoded in this file itself instead of a traditional
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* dedicated file and dissector format because the dissector would require some
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* fields of the FC_HDR such as param in some cases, type in some others, the
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* lower 4 bits of r_ctl in some other cases etc. So, we decode BLS & Link Ctl
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* in this file itself.
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*/
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static void
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dissect_fc_ba_acc (tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
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{
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/* Set up structures needed to add the protocol subtree and manage it */
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proto_item *ti;
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proto_tree *acc_tree;
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int offset = 0;
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/* Make entries in Protocol column and Info column on summary display */
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if (check_col(pinfo->cinfo, COL_PROTOCOL))
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "BLS");
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if (check_col(pinfo->cinfo, COL_INFO))
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col_set_str(pinfo->cinfo, COL_INFO, "BA_ACC");
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if (tree) {
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ti = proto_tree_add_text (tree, tvb, 0, tvb_length (tvb), "Basic Link Svc");
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acc_tree = proto_item_add_subtree (ti, ett_fcbls);
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proto_tree_add_item (acc_tree, hf_fc_bls_seqid_vld, tvb, offset++, 1, FALSE);
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proto_tree_add_item (acc_tree, hf_fc_bls_lastvld_seqid, tvb, offset++, 1, FALSE);
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offset += 2; /* Skip reserved field */
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proto_tree_add_item (acc_tree, hf_fc_bls_oxid, tvb, offset, 2, FALSE);
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offset += 2;
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proto_tree_add_item (acc_tree, hf_fc_bls_rxid, tvb, offset, 2, FALSE);
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offset += 2;
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proto_tree_add_item (acc_tree, hf_fc_bls_lowseqcnt, tvb, offset, 2, FALSE);
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offset += 2;
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proto_tree_add_item (acc_tree, hf_fc_bls_hiseqcnt, tvb, offset, 2, FALSE);
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}
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}
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static void
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dissect_fc_ba_rjt (tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
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{
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/* Set up structures needed to add the protocol subtree and manage it */
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proto_item *ti;
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proto_tree *rjt_tree;
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int offset = 0;
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/* Make entries in Protocol column and Info column on summary display */
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if (check_col(pinfo->cinfo, COL_PROTOCOL))
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "BLS");
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if (check_col(pinfo->cinfo, COL_INFO))
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col_set_str(pinfo->cinfo, COL_INFO, "BA_RJT");
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if (tree) {
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ti = proto_tree_add_text (tree, tvb, 0, tvb_length (tvb), "Basic Link Svc");
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rjt_tree = proto_item_add_subtree (ti, ett_fcbls);
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proto_tree_add_item (rjt_tree, hf_fc_bls_rjtcode, tvb, offset+1, 1, FALSE);
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proto_tree_add_item (rjt_tree, hf_fc_bls_rjtdetail, tvb, offset+2, 1, FALSE);
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proto_tree_add_item (rjt_tree, hf_fc_bls_vendor, tvb, offset+3, 1, FALSE);
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}
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}
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static guint8
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fc_get_ftype (guint8 r_ctl, guint8 type)
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{
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/* A simple attempt to determine the upper level protocol based on the
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* r_ctl & type fields.
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*/
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switch (r_ctl & 0xF0) {
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case FC_RCTL_DEV_DATA:
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switch (type) {
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case FC_TYPE_SWILS:
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if ((r_ctl == 0x2) || (r_ctl == 0x3))
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return FC_FTYPE_SWILS;
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else
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return FC_FTYPE_UNDEF;
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case FC_TYPE_IP:
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return FC_FTYPE_IP;
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case FC_TYPE_SCSI:
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return FC_FTYPE_SCSI;
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case FC_TYPE_FCCT:
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return FC_FTYPE_FCCT;
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default:
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return FC_FTYPE_UNDEF;
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}
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break;
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case FC_RCTL_ELS:
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if (((r_ctl & 0x0F) == 0x2) || ((r_ctl & 0x0F) == 0x3))
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return FC_FTYPE_ELS;
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else
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return FC_FTYPE_UNDEF;
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break;
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case FC_RCTL_LINK_DATA:
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return FC_FTYPE_LINKDATA;
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break;
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case FC_RCTL_VIDEO:
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return FC_FTYPE_VDO;
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break;
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case FC_RCTL_BLS:
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if (type == 0)
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return FC_FTYPE_BLS;
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else
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return FC_FTYPE_UNDEF;
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break;
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case FC_RCTL_LINK_CTL:
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return FC_FTYPE_LINKCTL;
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break;
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default:
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return FC_FTYPE_UNDEF;
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break;
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}
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}
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/* Code to actually dissect the packets */
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static void
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dissect_fc (tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
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{
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/* Set up structures needed to add the protocol subtree and manage it */
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proto_item *ti;
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proto_tree *fc_tree = NULL;
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tvbuff_t *next_tvb;
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int offset = 0, next_offset;
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gboolean is_lastframe_inseq;
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gboolean is_exchg_resp = 0;
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fragment_data *fcfrag_head;
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guint32 frag_id;
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guint32 frag_size;
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guint8 r_ctl, type, df_ctl;
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gchar str[256];
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guint32 param;
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guint16 seqcnt;
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guint8 ftype;
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gboolean is_ack;
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/* Make entries in Protocol column and Info column on summary display */
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if (check_col(pinfo->cinfo, COL_PROTOCOL))
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "FC");
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r_ctl = tvb_get_guint8 (tvb, offset);
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/* If the R_CTL is the EISL field, skip the first 8 bytes to retrieve the
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* real FC header. EISL is Cisco-proprietary and is not decoded.
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*/
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if (r_ctl == FC_RCTL_EISL) {
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offset += 8;
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r_ctl = tvb_get_guint8 (tvb, offset);
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}
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type = tvb_get_guint8 (tvb, offset+8);
|
|
seqcnt = tvb_get_ntohs (tvb, offset+14);
|
|
param = tvb_get_ntohl (tvb, offset+20);
|
|
|
|
SET_ADDRESS (&pinfo->dst, AT_FC, 3, tvb_get_ptr (tvb, 1, 3));
|
|
SET_ADDRESS (&pinfo->src, AT_FC, 3, tvb_get_ptr (tvb, 5, 3));
|
|
pinfo->oxid = tvb_get_ntohs (tvb, offset+16);
|
|
pinfo->rxid = tvb_get_ntohs (tvb, offset+18);
|
|
pinfo->ptype = PT_EXCHG;
|
|
pinfo->r_ctl = r_ctl;
|
|
|
|
is_ack = ((r_ctl == 0xC0) || (r_ctl == 0xC1));
|
|
|
|
ftype = fc_get_ftype (r_ctl, type);
|
|
|
|
if (check_col (pinfo->cinfo, COL_INFO)) {
|
|
col_add_str (pinfo->cinfo, COL_INFO, match_strval (ftype, fc_ftype_vals));
|
|
|
|
if (ftype == FC_FTYPE_LINKCTL)
|
|
col_append_fstr (pinfo->cinfo, COL_INFO, ", %s",
|
|
match_strval ((r_ctl & 0x0F),
|
|
fc_lctl_proto_val));
|
|
}
|
|
|
|
/* In the interest of speed, if "tree" is NULL, don't do any work not
|
|
necessary to generate protocol tree items. */
|
|
if (tree) {
|
|
ti = proto_tree_add_protocol_format (tree, proto_fc, tvb, offset,
|
|
FC_HEADER_SIZE, "Fibre Channel");
|
|
fc_tree = proto_item_add_subtree (ti, ett_fc);
|
|
|
|
if (ftype == FC_FTYPE_LINKCTL) {
|
|
/* the lower 4 bits of R_CTL indicate the type of link ctl frame */
|
|
proto_tree_add_uint_format (fc_tree, hf_fc_rctl, tvb, offset,
|
|
FC_RCTL_SIZE, r_ctl,
|
|
"R_CTL: 0x%x(%s)",
|
|
r_ctl,
|
|
val_to_str ((r_ctl & 0x0F),
|
|
fc_lctl_proto_val, "0x%x"));
|
|
}
|
|
else if (ftype == FC_FTYPE_BLS) {
|
|
/* the lower 4 bits of R_CTL indicate the type of BLS frame */
|
|
proto_tree_add_uint_format (fc_tree, hf_fc_rctl, tvb, offset,
|
|
FC_RCTL_SIZE, r_ctl,
|
|
"R_CTL: 0x%x(%s)",
|
|
r_ctl,
|
|
val_to_str ((r_ctl & 0x0F),
|
|
fc_bls_proto_val, "0x%x"));
|
|
}
|
|
else {
|
|
proto_tree_add_item (fc_tree, hf_fc_rctl, tvb, offset, 1, FALSE);
|
|
}
|
|
|
|
proto_tree_add_uint_hidden (fc_tree, hf_fc_ftype, tvb, offset, 1,
|
|
ftype);
|
|
proto_tree_add_string (fc_tree, hf_fc_did, tvb, offset+1, 3,
|
|
fc_to_str ((guint8 *)tvb_get_ptr (tvb,
|
|
offset+1, 3)));
|
|
proto_tree_add_item (fc_tree, hf_fc_csctl, tvb, offset+4, 1, FALSE);
|
|
|
|
proto_tree_add_string (fc_tree, hf_fc_sid, tvb, offset+5, 3,
|
|
fc_to_str ((guint8 *)tvb_get_ptr (tvb,
|
|
offset+5, 3)));
|
|
|
|
if (ftype == FC_FTYPE_LINKCTL) {
|
|
if (((r_ctl & 0x0F) == FC_LCTL_FBSYB) ||
|
|
((r_ctl & 0x0F) == FC_LCTL_FBSYL)) {
|
|
/* for F_BSY frames, the upper 4 bits of the type field specify the
|
|
* reason for the BSY.
|
|
*/
|
|
proto_tree_add_uint_format (fc_tree, hf_fc_type, tvb,
|
|
offset+8, FC_TYPE_SIZE,
|
|
type, "Type: 0x%x(%s)", type,
|
|
fclctl_get_typestr (r_ctl & 0x0F,
|
|
type));
|
|
}
|
|
else {
|
|
proto_tree_add_item (fc_tree, hf_fc_type, tvb, offset+8, 1, FALSE);
|
|
}
|
|
}
|
|
else {
|
|
proto_tree_add_item (fc_tree, hf_fc_type, tvb, offset+8, 1, FALSE);
|
|
}
|
|
|
|
proto_tree_add_uint_format (fc_tree, hf_fc_fctl, tvb, offset+9,
|
|
3, tvb_get_ntoh24 (tvb, offset+9),
|
|
"F_CTL: 0x%x (%s)",
|
|
tvb_get_ntoh24 (tvb, offset+9),
|
|
fctl_to_str (tvb_get_ptr (tvb, offset+9, 3),
|
|
str, is_ack));
|
|
|
|
/* Bit 23 if set => this frame is from the exchange originator */
|
|
if (tvb_get_guint8 (tvb, offset+9) & 0x80) {
|
|
proto_tree_add_boolean_hidden (fc_tree, hf_fc_exchg_orig, tvb,
|
|
offset+9, 1, 0);
|
|
proto_tree_add_boolean_hidden (fc_tree, hf_fc_exchg_resp, tvb,
|
|
offset+9, 1, 1);
|
|
}
|
|
else {
|
|
proto_tree_add_boolean_hidden (fc_tree, hf_fc_exchg_orig, tvb,
|
|
offset+9, 1, 1);
|
|
proto_tree_add_boolean_hidden (fc_tree, hf_fc_exchg_resp, tvb,
|
|
offset+9, 1, 0);
|
|
}
|
|
|
|
proto_tree_add_item (fc_tree, hf_fc_seqid, tvb, offset+12, 1, FALSE);
|
|
}
|
|
df_ctl = tvb_get_guint8(tvb, offset+13);
|
|
if (tree) {
|
|
proto_tree_add_uint (fc_tree, hf_fc_dfctl, tvb, offset+13, 1, df_ctl);
|
|
proto_tree_add_item (fc_tree, hf_fc_seqcnt, tvb, offset+14, 2, FALSE);
|
|
proto_tree_add_item (fc_tree, hf_fc_oxid, tvb, offset+16, 2, FALSE);
|
|
proto_tree_add_item (fc_tree, hf_fc_rxid, tvb, offset+18, 2, FALSE);
|
|
|
|
if (ftype == FC_FTYPE_LINKCTL) {
|
|
if (((r_ctl & 0x0F) == FC_LCTL_FRJT) ||
|
|
((r_ctl & 0x0F) == FC_LCTL_PRJT) ||
|
|
((r_ctl & 0x0F) == FC_LCTL_PBSY)) {
|
|
/* In all these cases of Link Ctl frame, the parameter field
|
|
* encodes the detailed error message
|
|
*/
|
|
proto_tree_add_uint_format (fc_tree, hf_fc_param, tvb,
|
|
offset+20, 4, param,
|
|
"Parameter: 0x%x(%s)", param,
|
|
fclctl_get_paramstr ((r_ctl & 0x0F),
|
|
param));
|
|
}
|
|
else {
|
|
proto_tree_add_item (fc_tree, hf_fc_param, tvb, offset+20, 4, FALSE);
|
|
}
|
|
}
|
|
else if (ftype == FC_FTYPE_BLS) {
|
|
if ((r_ctl & 0x0F) == FC_BLS_ABTS) {
|
|
proto_tree_add_uint_format (fc_tree, hf_fc_param, tvb,
|
|
offset+20, 4, param,
|
|
"Parameter: 0x%x(%s)", param,
|
|
((param & 0x0F) == 1 ? "Abort Sequence" :
|
|
"Abort Exchange"));
|
|
}
|
|
else {
|
|
proto_tree_add_item (fc_tree, hf_fc_param, tvb, offset+20,
|
|
4, FALSE);
|
|
}
|
|
}
|
|
else {
|
|
proto_tree_add_item (fc_tree, hf_fc_param, tvb, offset+20, 4, FALSE);
|
|
}
|
|
}
|
|
|
|
/* Skip the Frame_Header */
|
|
next_offset = offset + FC_HEADER_SIZE;
|
|
|
|
/* Network_Header present? */
|
|
if (df_ctl & FC_DFCTL_NH) {
|
|
/* Yes - dissect it. */
|
|
if (tree) {
|
|
proto_tree_add_string (fc_tree, hf_fc_nh_da, tvb, next_offset, 8,
|
|
fcwwn_to_str (tvb_get_ptr (tvb, offset, 8)));
|
|
proto_tree_add_string (fc_tree, hf_fc_nh_sa, tvb, offset+8, 8,
|
|
fcwwn_to_str (tvb_get_ptr (tvb, offset+8, 8)));
|
|
}
|
|
next_offset += 16;
|
|
}
|
|
|
|
/* XXX - handle Association_Header and Device_Header here */
|
|
|
|
if (ftype == FC_FTYPE_LINKCTL) {
|
|
/* ACK_1 frames and other LINK_CTL frames echo the last seq bit if the
|
|
* packet they're ack'ing did not have it set. So, we'll incorrectly
|
|
* flag them as being fragmented when they're not. This fixes the
|
|
* problem
|
|
*/
|
|
is_lastframe_inseq = TRUE;
|
|
}
|
|
else {
|
|
is_lastframe_inseq = tvb_get_guint8 (tvb, offset+9) & 0x08;
|
|
is_exchg_resp = ((tvb_get_guint8 (tvb, offset+20) & 0x80) == 0x80);
|
|
}
|
|
|
|
frag_size = tvb_reported_length (tvb)-FC_HEADER_SIZE;
|
|
|
|
if (!is_lastframe_inseq) {
|
|
/* Show this only as a fragmented FC frame */
|
|
if (check_col (pinfo->cinfo, COL_INFO)) {
|
|
col_append_str (pinfo->cinfo, COL_INFO, " (Fragmented)");
|
|
}
|
|
}
|
|
|
|
/* If this is a fragment, attempt to check if fully reassembled frame is
|
|
* present, if we're configured to reassemble.
|
|
*/
|
|
if ((ftype != FC_FTYPE_LINKCTL) && (ftype != FC_FTYPE_BLS) &&
|
|
seqcnt && fc_reassemble) {
|
|
/* Add this to the list of fragments */
|
|
frag_id = (pinfo->oxid << 16) | is_exchg_resp;
|
|
|
|
/* We assume that all frames are of the same max size */
|
|
fcfrag_head = fragment_add (tvb, FC_HEADER_SIZE, pinfo, frag_id,
|
|
fc_fragment_table,
|
|
seqcnt * fc_max_frame_size,
|
|
frag_size,
|
|
TRUE);
|
|
|
|
if (fcfrag_head) {
|
|
next_tvb = tvb_new_real_data (fcfrag_head->data,
|
|
fcfrag_head->datalen,
|
|
fcfrag_head->datalen);
|
|
tvb_set_child_real_data_tvbuff(tvb, next_tvb);
|
|
|
|
/* Add the defragmented data to the data source list. */
|
|
add_new_data_source(pinfo, next_tvb, "Reassembled FC");
|
|
|
|
if (tree) {
|
|
proto_tree_add_boolean_hidden (fc_tree, hf_fc_reassembled,
|
|
tvb, offset+9, 1, 1);
|
|
}
|
|
}
|
|
else {
|
|
if (tree) {
|
|
proto_tree_add_boolean_hidden (fc_tree, hf_fc_reassembled,
|
|
tvb, offset+9, 1, 0);
|
|
}
|
|
next_tvb = tvb_new_subset (tvb, next_offset, -1, -1);
|
|
call_dissector (data_handle, next_tvb, pinfo, tree);
|
|
return;
|
|
}
|
|
}
|
|
else {
|
|
if (tree) {
|
|
proto_tree_add_boolean_hidden (fc_tree, hf_fc_reassembled,
|
|
tvb, offset+9, 1, 0);
|
|
}
|
|
next_tvb = tvb_new_subset (tvb, next_offset, -1, -1);
|
|
}
|
|
|
|
if ((ftype != FC_FTYPE_LINKCTL) && (ftype != FC_FTYPE_BLS)) {
|
|
if (!dissector_try_port (fcftype_dissector_table, ftype, next_tvb,
|
|
pinfo, tree)) {
|
|
call_dissector (data_handle, next_tvb, pinfo, tree);
|
|
}
|
|
}
|
|
else if (ftype == FC_FTYPE_BLS) {
|
|
if ((r_ctl & 0x0F) == FC_BLS_BAACC) {
|
|
dissect_fc_ba_acc (next_tvb, pinfo, tree);
|
|
}
|
|
else if ((r_ctl & 0x0F) == FC_BLS_BARJT) {
|
|
dissect_fc_ba_rjt (next_tvb, pinfo, tree);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/* Register the protocol with Ethereal */
|
|
|
|
/* this format is require because a script is used to build the C function
|
|
that calls all the protocol registration.
|
|
*/
|
|
|
|
void
|
|
proto_register_fc(void)
|
|
{
|
|
|
|
/* Setup list of header fields See Section 1.6.1 for details*/
|
|
static hf_register_info hf[] = {
|
|
{ &hf_fc_rctl,
|
|
{ "R_CTL", "fc.r_ctl", FT_UINT8, BASE_HEX, NULL, 0x0,
|
|
"R_CTL", HFILL }},
|
|
{ &hf_fc_ftype,
|
|
{"Frame type", "fc.ftype", FT_UINT8, BASE_HEX, VALS(fc_ftype_vals),
|
|
0x0, "Derived Type", HFILL}},
|
|
{ &hf_fc_did,
|
|
{ "Dest Addr", "fc.d_id", FT_STRING, BASE_HEX, NULL, 0x0,
|
|
"Destination Address", HFILL}},
|
|
{ &hf_fc_csctl,
|
|
{"CS_CTL", "fc.cs_ctl", FT_UINT8, BASE_HEX, NULL, 0x0,
|
|
"CS_CTL", HFILL}},
|
|
{ &hf_fc_sid,
|
|
{"Src Addr", "fc.s_id", FT_STRING, BASE_HEX, NULL, 0x0,
|
|
"Source Address", HFILL}},
|
|
{ &hf_fc_type,
|
|
{"Type", "fc.type", FT_UINT8, BASE_HEX, VALS (fc_fc4_val), 0x0,
|
|
"", HFILL}},
|
|
{ &hf_fc_fctl,
|
|
{"F_CTL", "fc.f_ctl", FT_UINT24, BASE_HEX, NULL, 0x0, "", HFILL}},
|
|
{ &hf_fc_seqid,
|
|
{"SEQ_ID", "fc.seq_id", FT_UINT8, BASE_HEX, NULL, 0x0,
|
|
"Sequence ID", HFILL}},
|
|
{ &hf_fc_dfctl,
|
|
{"DF_CTL", "fc.df_ctl", FT_UINT8, BASE_HEX, NULL, 0x0, "", HFILL}},
|
|
{ &hf_fc_seqcnt,
|
|
{"SEQ_CNT", "fc.seq_cnt", FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
"Sequence Count", HFILL}},
|
|
{ &hf_fc_oxid,
|
|
{"OX_ID", "fc.ox_id", FT_UINT16, BASE_HEX, NULL, 0x0, "Originator ID",
|
|
HFILL}},
|
|
{ &hf_fc_rxid,
|
|
{"RX_ID", "fc.rx_id", FT_UINT16, BASE_HEX, NULL, 0x0, "Receiver ID",
|
|
HFILL}},
|
|
{ &hf_fc_param,
|
|
{"Parameter", "fc.parameter", FT_UINT32, BASE_HEX, NULL, 0x0, "Parameter",
|
|
HFILL}},
|
|
|
|
{ &hf_fc_exchg_orig,
|
|
{"Exchange Originator", "fc.xchg_orig", FT_BOOLEAN, BASE_HEX, NULL,
|
|
0x0, "", HFILL}},
|
|
{ &hf_fc_exchg_resp,
|
|
{"Exchange Responder", "fc.xchg_resp", FT_BOOLEAN, BASE_HEX, NULL,
|
|
0x0, "", HFILL}},
|
|
{ &hf_fc_reassembled,
|
|
{"Reassembled Frame", "fc.reassembled", FT_BOOLEAN, BASE_HEX, NULL,
|
|
0x0, "", HFILL}},
|
|
{ &hf_fc_nh_da,
|
|
{"Network DA", "fc.nethdr.da", FT_STRING, BASE_HEX, NULL,
|
|
0x0, "", HFILL}},
|
|
{ &hf_fc_nh_sa,
|
|
{"Network SA", "fc.nethdr.sa", FT_STRING, BASE_HEX, NULL,
|
|
0x0, "", HFILL}},
|
|
|
|
/* Basic Link Svc field definitions */
|
|
{ &hf_fc_bls_seqid_vld,
|
|
{"SEQID Valid", "fc.bls_seqidvld", FT_UINT8, BASE_HEX,
|
|
VALS (fc_bls_seqid_val), 0x0, "", HFILL}},
|
|
{ &hf_fc_bls_lastvld_seqid,
|
|
{"Last Valid SEQID", "fc.bls_lastseqid", FT_UINT8, BASE_HEX, NULL,
|
|
0x0, "", HFILL}},
|
|
{ &hf_fc_bls_oxid,
|
|
{"OXID", "fc.bls_oxid", FT_UINT16, BASE_HEX, NULL, 0x0, "", HFILL}},
|
|
{ &hf_fc_bls_rxid,
|
|
{"RXID", "fc.bls_rxid", FT_UINT16, BASE_HEX, NULL, 0x0, "", HFILL}},
|
|
{ &hf_fc_bls_lowseqcnt,
|
|
{"Low SEQCNT", "fc.bls_lseqcnt", FT_UINT16, BASE_HEX, NULL, 0x0, "",
|
|
HFILL}},
|
|
{ &hf_fc_bls_hiseqcnt,
|
|
{"High SEQCNT", "fc.bls_hseqcnt", FT_UINT16, BASE_HEX, NULL, 0x0, "",
|
|
HFILL}},
|
|
{ &hf_fc_bls_rjtcode,
|
|
{"Reason", "fc.bls_reason", FT_UINT8, BASE_HEX, VALS(fc_bls_barjt_val),
|
|
0x0, "", HFILL}},
|
|
{ &hf_fc_bls_rjtdetail,
|
|
{"Reason Explanantion", "fc.bls_rjtdetail", FT_UINT8, BASE_HEX,
|
|
VALS (fc_bls_barjt_det_val), 0x0, "", HFILL}},
|
|
{ &hf_fc_bls_vendor,
|
|
{"Vendor Unique Reason", "fc.bls_vnduniq", FT_UINT8, BASE_HEX, NULL,
|
|
0x0, "", HFILL}},
|
|
};
|
|
|
|
/* Setup protocol subtree array */
|
|
static gint *ett[] = {
|
|
&ett_fc,
|
|
&ett_fcbls,
|
|
};
|
|
|
|
module_t *fc_module;
|
|
|
|
/* Register the protocol name and description */
|
|
proto_fc = proto_register_protocol ("Fibre Channel", "FC", "fc");
|
|
register_dissector ("fc", dissect_fc, proto_fc);
|
|
|
|
/* Required function calls to register the header fields and subtrees used */
|
|
proto_register_field_array(proto_fc, hf, array_length(hf));
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
|
|
fcftype_dissector_table = register_dissector_table ("fc.ftype",
|
|
"FC Frame Type",
|
|
FT_UINT8, BASE_HEX);
|
|
|
|
/* Register preferences */
|
|
fc_module = prefs_register_protocol (proto_fc, NULL);
|
|
prefs_register_bool_preference (fc_module,
|
|
"reassemble_fc", "Reassemble FC",
|
|
"If enabled, reassembly of multi-frame "
|
|
"sequences is done",
|
|
&fc_reassemble);
|
|
prefs_register_uint_preference (fc_module,
|
|
"fc_max_frame_size", "Max FC Frame Size",
|
|
"This is the size of non-last frames in a "
|
|
"multi-frame sequence", 10,
|
|
&fc_max_frame_size);
|
|
|
|
register_init_routine(fc_defragment_init);
|
|
}
|
|
|
|
|
|
/* If this dissector uses sub-dissector registration add a registration routine.
|
|
This format is required because a script is used to find these routines and
|
|
create the code that calls these routines.
|
|
*/
|
|
void
|
|
proto_reg_handoff_fc (void)
|
|
{
|
|
dissector_handle_t fc_handle;
|
|
|
|
fc_handle = create_dissector_handle (dissect_fc, proto_fc);
|
|
|
|
data_handle = find_dissector("data");
|
|
}
|