forked from osmocom/wireshark
![Gerald Combs](/assets/img/avatar_default.png)
- Add FCIP to the list of protocols that can be selected from "Decode As" - Add an indicator for EISL header in FC frames. svn path=/trunk/; revision=10101
1455 lines
51 KiB
C
1455 lines
51 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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* Copyright 2003 Ronnie Sahlberg, exchange first/last matching and
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* tap listener and misc updates
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*
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* $Id: packet-fc.c,v 1.18 2004/02/19 00:29:15 gerald 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 <epan/conversation.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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#include "tap.h"
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#define FC_HEADER_SIZE 24
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#define FC_RCTL_EISL 0x50
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#define MDSHDR_TRAILER_SIZE 6
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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_time = -1;
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static int hf_fc_exchange_first_frame = -1;
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static int hf_fc_exchange_last_frame = -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_id = -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_fctl_exchange_responder = -1;
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static int hf_fc_fctl_seq_recipient = -1;
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static int hf_fc_fctl_exchange_first = -1;
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static int hf_fc_fctl_exchange_last = -1;
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static int hf_fc_fctl_seq_last = -1;
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static int hf_fc_fctl_priority = -1;
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static int hf_fc_fctl_transfer_seq_initiative = -1;
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static int hf_fc_fctl_rexmitted_seq = -1;
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static int hf_fc_fctl_rel_offset = -1;
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static int hf_fc_fctl_abts_ack = -1;
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static int hf_fc_fctl_abts_not_ack = -1;
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static int hf_fc_fctl_last_data_frame = -1;
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static int hf_fc_fctl_ack_0_1 = -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_reassembled = -1;
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static int hf_fc_eisl = -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_fctl = -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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static int fc_tap = -1;
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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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typedef struct _fcseq_conv_key {
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guint32 conv_idx;
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} fcseq_conv_key_t;
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typedef struct _fcseq_conv_data {
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guint32 seq_cnt;
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} fcseq_conv_data_t;
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GHashTable *fcseq_req_hash = NULL;
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GMemChunk *fcseq_req_keys = NULL;
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GMemChunk *fcseq_req_vals = NULL;
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guint32 fcseq_init_count = 25;
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static GHashTable *fc_exchange_unmatched = NULL;
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static GHashTable *fc_exchange_matched = NULL;
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static GMemChunk *fc_exchange_vals = NULL;
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static guint32 fc_exchange_init_count = 200;
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/*
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* Hash Functions
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*/
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static gint
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fcseq_equal(gconstpointer v, gconstpointer w)
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{
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fcseq_conv_key_t *v1 = (fcseq_conv_key_t *)v;
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fcseq_conv_key_t *v2 = (fcseq_conv_key_t *)w;
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return (v1->conv_idx == v2->conv_idx);
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}
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static guint
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fcseq_hash (gconstpointer v)
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{
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fcseq_conv_key_t *key = (fcseq_conv_key_t *)v;
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guint val;
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val = key->conv_idx;
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return val;
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}
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static guint
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fc_exchange_hash_unmatched(gconstpointer v)
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{
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const fc_exchange_data *fced=(const fc_exchange_data *)v;
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return fced->oxid;
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}
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static gint
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fc_exchange_equal_unmatched(gconstpointer v1, gconstpointer v2)
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{
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const fc_exchange_data *fced1=(const fc_exchange_data *)v1;
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const fc_exchange_data *fced2=(const fc_exchange_data *)v2;
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/* oxid must match */
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if(fced1->oxid!=fced2->oxid){
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return 0;
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}
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/* compare s_id, d_id and treat the fc address
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s_id==00.00.00 as a wildcard matching anything */
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if( ((fced1->s_id.data[0]!=0)||(fced1->s_id.data[1]!=0)||(fced1->s_id.data[2]!=0)) && CMP_ADDRESS(&fced1->s_id, &fced2->s_id) ){
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return 0;
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}
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if(CMP_ADDRESS(&fced1->d_id, &fced2->d_id)){
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return 0;
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}
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return 1;
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}
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static guint
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fc_exchange_hash_matched(gconstpointer v)
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{
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const fc_exchange_data *fced=(const fc_exchange_data *)v;
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return fced->oxid;
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}
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static gint
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fc_exchange_equal_matched(gconstpointer v1, gconstpointer v2)
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{
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const fc_exchange_data *fced1=(const fc_exchange_data *)v1;
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const fc_exchange_data *fced2=(const fc_exchange_data *)v2;
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guint32 fef1, fef2, lef1, lef2;
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/* oxid must match */
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if(fced1->oxid!=fced2->oxid){
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return 0;
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}
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fef1=fced1->first_exchange_frame;
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fef2=fced2->first_exchange_frame;
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lef1=fced1->last_exchange_frame;
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lef2=fced2->last_exchange_frame;
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if(!fef1)fef1=fef2;
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if(!fef2)fef2=fef1;
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if(!lef1)lef1=lef2;
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if(!lef2)lef2=lef1;
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if(fef1!=fef2){
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return 0;
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}
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if(lef1!=lef2){
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return 0;
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}
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return 1;
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}
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static void
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fc_exchange_init_protocol(void)
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{
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if(fc_exchange_vals){
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g_mem_chunk_destroy(fc_exchange_vals);
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fc_exchange_vals=NULL;
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}
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if(fc_exchange_unmatched){
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g_hash_table_destroy(fc_exchange_unmatched);
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fc_exchange_unmatched=NULL;
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}
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if(fc_exchange_matched){
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g_hash_table_destroy(fc_exchange_matched);
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fc_exchange_matched=NULL;
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}
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fc_exchange_unmatched=g_hash_table_new(fc_exchange_hash_unmatched, fc_exchange_equal_unmatched);
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fc_exchange_matched=g_hash_table_new(fc_exchange_hash_matched, fc_exchange_equal_matched);
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fc_exchange_vals=g_mem_chunk_new("fc_exchange_vals", sizeof(fc_exchange_data), fc_exchange_init_count*sizeof(fc_exchange_data), G_ALLOC_AND_FREE);
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fragment_table_init(&fc_fragment_table);
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if (fcseq_req_keys)
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g_mem_chunk_destroy (fcseq_req_keys);
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if (fcseq_req_vals)
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g_mem_chunk_destroy (fcseq_req_vals);
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if (fcseq_req_hash)
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g_hash_table_destroy(fcseq_req_hash);
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fcseq_req_hash = g_hash_table_new(fcseq_hash, fcseq_equal);
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fcseq_req_keys = g_mem_chunk_new ("fcseq_req_keys",
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sizeof(fcseq_conv_key_t),
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fcseq_init_count *
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sizeof(fcseq_conv_key_t),
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G_ALLOC_AND_FREE);
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fcseq_req_vals = g_mem_chunk_new ("fcseq_req_vals",
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sizeof(fcseq_conv_data_t),
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fcseq_init_count *
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sizeof(fcseq_conv_data_t),
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G_ALLOC_AND_FREE);
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}
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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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{FC_TYPE_SB_FROM_CU, "SB-3(CU->Channel)"},
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{FC_TYPE_SB_TO_CU, "SB-3(Channel->CU)"},
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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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{FC_FTYPE_SBCCS, "SBCCS"},
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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_routing_val[] = {
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{FC_RCTL_DEV_DATA, "Device_Data"},
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{FC_RCTL_ELS, "Extended Link Services"},
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{FC_RCTL_LINK_DATA, "FC-4 Link_Data"},
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{FC_RCTL_VIDEO, "Video_Data"},
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{FC_RCTL_BLS, "Basic Link Services"},
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{FC_RCTL_LINK_CTL, "Link_Control Frame"},
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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[2] & 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[2] & 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[2] & 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[2] & 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[2] & 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[2] & 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[2] & 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[0] & 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[0] & 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 - AbortABTS - 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) {
|
|
strcpy (&str[stroff], "ABTS - Stop, ");
|
|
stroff += 13;
|
|
}
|
|
else {
|
|
strcpy (&str[stroff], "ABTS - Process/IB, ");
|
|
stroff += 19;
|
|
}
|
|
break;
|
|
case 0x30:
|
|
if (is_ack) {
|
|
strcpy (&str[stroff], "ABTS - Imm Seq Retx, ");
|
|
stroff += 21;
|
|
}
|
|
else {
|
|
strcpy (&str[stroff], "ABTS - Discard/MS/Imm Retx, ");
|
|
stroff += 28;
|
|
}
|
|
break;
|
|
}
|
|
|
|
if (fctl[0] & 0x8) {
|
|
strcpy (&str[stroff], "Rel Offset = 1");
|
|
stroff += 14;
|
|
}
|
|
|
|
return (str);
|
|
}
|
|
|
|
/* BA_ACC & BA_RJT are decoded in this file itself instead of a traditional
|
|
* dedicated file and dissector format because the dissector would require some
|
|
* fields of the FC_HDR such as param in some cases, type in some others, the
|
|
* lower 4 bits of r_ctl in some other cases etc. So, we decode BLS & Link Ctl
|
|
* in this file itself.
|
|
*/
|
|
static void
|
|
dissect_fc_ba_acc (tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
|
|
{
|
|
/* Set up structures needed to add the protocol subtree and manage it */
|
|
proto_item *ti;
|
|
proto_tree *acc_tree;
|
|
int offset = 0;
|
|
|
|
/* Make entries in Protocol column and Info column on summary display */
|
|
if (check_col(pinfo->cinfo, COL_PROTOCOL))
|
|
col_set_str(pinfo->cinfo, COL_PROTOCOL, "BLS");
|
|
|
|
if (check_col(pinfo->cinfo, COL_INFO))
|
|
col_set_str(pinfo->cinfo, COL_INFO, "BA_ACC");
|
|
|
|
if (tree) {
|
|
ti = proto_tree_add_text (tree, tvb, 0, tvb_length (tvb), "Basic Link Svc");
|
|
acc_tree = proto_item_add_subtree (ti, ett_fcbls);
|
|
|
|
proto_tree_add_item (acc_tree, hf_fc_bls_seqid_vld, tvb, offset++, 1, FALSE);
|
|
proto_tree_add_item (acc_tree, hf_fc_bls_lastvld_seqid, tvb, offset++, 1, FALSE);
|
|
offset += 2; /* Skip reserved field */
|
|
proto_tree_add_item (acc_tree, hf_fc_bls_oxid, tvb, offset, 2, FALSE);
|
|
offset += 2;
|
|
proto_tree_add_item (acc_tree, hf_fc_bls_rxid, tvb, offset, 2, FALSE);
|
|
offset += 2;
|
|
proto_tree_add_item (acc_tree, hf_fc_bls_lowseqcnt, tvb, offset, 2, FALSE);
|
|
offset += 2;
|
|
proto_tree_add_item (acc_tree, hf_fc_bls_hiseqcnt, tvb, offset, 2, FALSE);
|
|
}
|
|
}
|
|
|
|
static void
|
|
dissect_fc_ba_rjt (tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
|
|
{
|
|
/* Set up structures needed to add the protocol subtree and manage it */
|
|
proto_item *ti;
|
|
proto_tree *rjt_tree;
|
|
int offset = 0;
|
|
|
|
/* Make entries in Protocol column and Info column on summary display */
|
|
if (check_col(pinfo->cinfo, COL_PROTOCOL))
|
|
col_set_str(pinfo->cinfo, COL_PROTOCOL, "BLS");
|
|
|
|
if (check_col(pinfo->cinfo, COL_INFO))
|
|
col_set_str(pinfo->cinfo, COL_INFO, "BA_RJT");
|
|
|
|
if (tree) {
|
|
ti = proto_tree_add_text (tree, tvb, 0, tvb_length (tvb), "Basic Link Svc");
|
|
rjt_tree = proto_item_add_subtree (ti, ett_fcbls);
|
|
|
|
proto_tree_add_item (rjt_tree, hf_fc_bls_rjtcode, tvb, offset+1, 1, FALSE);
|
|
proto_tree_add_item (rjt_tree, hf_fc_bls_rjtdetail, tvb, offset+2, 1, FALSE);
|
|
proto_tree_add_item (rjt_tree, hf_fc_bls_vendor, tvb, offset+3, 1, FALSE);
|
|
}
|
|
}
|
|
|
|
static guint8
|
|
fc_get_ftype (guint8 r_ctl, guint8 type)
|
|
{
|
|
/* A simple attempt to determine the upper level protocol based on the
|
|
* r_ctl & type fields.
|
|
*/
|
|
switch (r_ctl & 0xF0) {
|
|
case FC_RCTL_DEV_DATA:
|
|
switch (type) {
|
|
case FC_TYPE_SWILS:
|
|
if ((r_ctl == 0x2) || (r_ctl == 0x3))
|
|
return FC_FTYPE_SWILS;
|
|
else
|
|
return FC_FTYPE_UNDEF;
|
|
case FC_TYPE_IP:
|
|
return FC_FTYPE_IP;
|
|
case FC_TYPE_SCSI:
|
|
return FC_FTYPE_SCSI;
|
|
case FC_TYPE_FCCT:
|
|
return FC_FTYPE_FCCT;
|
|
case FC_TYPE_SB_FROM_CU:
|
|
case FC_TYPE_SB_TO_CU:
|
|
return FC_FTYPE_SBCCS;
|
|
default:
|
|
return FC_FTYPE_UNDEF;
|
|
}
|
|
break;
|
|
case FC_RCTL_ELS:
|
|
if (((r_ctl & 0x0F) == 0x2) || ((r_ctl & 0x0F) == 0x3))
|
|
return FC_FTYPE_ELS;
|
|
else
|
|
return FC_FTYPE_UNDEF;
|
|
break;
|
|
case FC_RCTL_LINK_DATA:
|
|
return FC_FTYPE_LINKDATA;
|
|
break;
|
|
case FC_RCTL_VIDEO:
|
|
return FC_FTYPE_VDO;
|
|
break;
|
|
case FC_RCTL_BLS:
|
|
if (type == 0)
|
|
return FC_FTYPE_BLS;
|
|
else
|
|
return FC_FTYPE_UNDEF;
|
|
break;
|
|
case FC_RCTL_LINK_CTL:
|
|
return FC_FTYPE_LINKCTL;
|
|
break;
|
|
default:
|
|
return FC_FTYPE_UNDEF;
|
|
break;
|
|
}
|
|
}
|
|
|
|
static const value_string abts_ack_vals[] = {
|
|
{0x000000, "ABTS - Cont"},
|
|
{0x000010, "ABTS - Abort"},
|
|
{0x000020, "ABTS - Stop"},
|
|
{0x000030, "ABTS - Imm Seq Retx"},
|
|
{0,NULL}
|
|
};
|
|
static const value_string abts_not_ack_vals[] = {
|
|
{0x000000, "ABTS - Abort/MS"},
|
|
{0x000010, "ABTS - Abort/SS"},
|
|
{0x000020, "ABTS - Process/IB"},
|
|
{0x000030, "ABTS - Discard/MS/Imm Retx"},
|
|
{0,NULL}
|
|
};
|
|
static const value_string last_data_frame_vals[] = {
|
|
{0x000000, "Last Data Frame - No Info"},
|
|
{0x004000, "Last Data Frame - Seq Imm"},
|
|
{0x008000, "Last Data Frame - Seq Soon"},
|
|
{0x00c000, "Last Data Frame - Seq Delyd"},
|
|
{0,NULL}
|
|
};
|
|
static const value_string ack_0_1_vals[] = {
|
|
{0x003000, "ACK_0 Required"},
|
|
{0x002000, "ACK_0 Required"},
|
|
{0x001000, "ACK_1 Required"},
|
|
{0x000000, "no ack required"},
|
|
{0,NULL}
|
|
};
|
|
static const true_false_string tfs_fc_fctl_exchange_responder = {
|
|
"Exchange Responder",
|
|
"Exchange Originator"
|
|
};
|
|
static const true_false_string tfs_fc_fctl_seq_recipient = {
|
|
"Seq Recipient",
|
|
"Seq Initiator"
|
|
};
|
|
static const true_false_string tfs_fc_fctl_exchange_first = {
|
|
"Exchg First",
|
|
"NOT exchg first"
|
|
};
|
|
static const true_false_string tfs_fc_fctl_exchange_last = {
|
|
"Exchg Last",
|
|
"NOT exchg last"
|
|
};
|
|
static const true_false_string tfs_fc_fctl_seq_last = {
|
|
"Seq Last",
|
|
"NOT seq last"
|
|
};
|
|
static const true_false_string tfs_fc_fctl_priority = {
|
|
"Priority",
|
|
"CS_CTL"
|
|
};
|
|
static const true_false_string tfs_fc_fctl_transfer_seq_initiative = {
|
|
"Transfer Seq Initiative",
|
|
"NOT transfer seq initiative"
|
|
};
|
|
static const true_false_string tfs_fc_fctl_rexmitted_seq = {
|
|
"Retransmitted Sequence",
|
|
"NOT retransmitted sequence"
|
|
};
|
|
static const true_false_string tfs_fc_fctl_rel_offset = {
|
|
"Rel Offset SET",
|
|
"rel offset NOT set"
|
|
};
|
|
|
|
|
|
|
|
|
|
/* code to dissect the F_CTL bitmask */
|
|
static void
|
|
dissect_fc_fctl(packet_info *pinfo _U_, proto_tree *parent_tree, tvbuff_t *tvb, int offset, gboolean is_ack, guint32 fctl)
|
|
{
|
|
proto_item *item;
|
|
proto_tree *tree;
|
|
gchar str[256];
|
|
|
|
item=proto_tree_add_uint(parent_tree, hf_fc_fctl, tvb, offset, 3, fctl);
|
|
tree=proto_item_add_subtree(item, ett_fctl);
|
|
|
|
|
|
proto_tree_add_boolean(tree, hf_fc_fctl_exchange_responder, tvb, offset, 3, fctl);
|
|
|
|
proto_tree_add_boolean(tree, hf_fc_fctl_seq_recipient, tvb, offset, 3, fctl);
|
|
|
|
proto_tree_add_boolean(tree, hf_fc_fctl_exchange_first, tvb, offset, 3, fctl);
|
|
|
|
proto_tree_add_boolean(tree, hf_fc_fctl_exchange_last, tvb, offset, 3, fctl);
|
|
|
|
proto_tree_add_boolean(tree, hf_fc_fctl_seq_last, tvb, offset, 3, fctl);
|
|
|
|
proto_tree_add_boolean(tree, hf_fc_fctl_priority, tvb, offset, 3, fctl);
|
|
|
|
proto_tree_add_boolean(tree, hf_fc_fctl_transfer_seq_initiative, tvb, offset, 3, fctl);
|
|
|
|
proto_tree_add_uint(tree, hf_fc_fctl_last_data_frame, tvb, offset, 3, fctl);
|
|
|
|
proto_tree_add_uint(tree, hf_fc_fctl_ack_0_1, tvb, offset, 3, fctl);
|
|
|
|
|
|
proto_tree_add_boolean(tree, hf_fc_fctl_rexmitted_seq, tvb, offset, 3, fctl);
|
|
|
|
if(is_ack){
|
|
proto_tree_add_uint(tree, hf_fc_fctl_abts_ack, tvb, offset, 3, fctl);
|
|
} else {
|
|
proto_tree_add_uint(tree, hf_fc_fctl_abts_ack, tvb, offset, 3, fctl);
|
|
}
|
|
|
|
proto_tree_add_boolean(tree, hf_fc_fctl_rel_offset, tvb, offset, 3, fctl);
|
|
|
|
fctl_to_str( ((guint8 *)&fctl), str, is_ack);
|
|
proto_item_append_text(item, " %s", str);
|
|
}
|
|
|
|
static const value_string fc_bls_proto_val[] = {
|
|
{FC_BLS_NOP , "NOP"},
|
|
{FC_BLS_ABTS , "ABTS"},
|
|
{FC_BLS_RMC , "RMC"},
|
|
{FC_BLS_BAACC , "BA_ACC"},
|
|
{FC_BLS_BARJT , "BA_RJT"},
|
|
{FC_BLS_PRMT , "PRMT"},
|
|
{0, NULL},
|
|
};
|
|
|
|
static const value_string fc_els_proto_val[] = {
|
|
{0x01 , "Solicited Data"},
|
|
{0x02 , "Request"},
|
|
{0x03 , "Reply"},
|
|
{0, NULL},
|
|
};
|
|
|
|
/* Code to actually dissect the packets */
|
|
static void
|
|
dissect_fc (tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
|
|
{
|
|
/* Set up structures needed to add the protocol subtree and manage it */
|
|
proto_item *ti=NULL;
|
|
proto_tree *fc_tree = NULL;
|
|
tvbuff_t *next_tvb;
|
|
int offset = 0, next_offset, eisl_offset = -1;
|
|
gboolean is_lastframe_inseq, is_1frame_inseq, is_valid_frame;
|
|
gboolean is_exchg_resp = 0;
|
|
fragment_data *fcfrag_head;
|
|
guint32 frag_id;
|
|
guint32 frag_size;
|
|
guint8 df_ctl, seq_id;
|
|
|
|
guint32 param;
|
|
guint16 real_seqcnt;
|
|
guint8 ftype;
|
|
gboolean is_ack;
|
|
|
|
static fc_hdr fchdr;
|
|
fc_exchange_data *fc_ex=NULL;
|
|
|
|
conversation_t *conversation;
|
|
fcseq_conv_data_t *cdata;
|
|
fcseq_conv_key_t ckey, *req_key;
|
|
|
|
fchdr.fced=NULL;
|
|
|
|
/* Make entries in Protocol column and Info column on summary display */
|
|
if (check_col(pinfo->cinfo, COL_PROTOCOL))
|
|
col_set_str(pinfo->cinfo, COL_PROTOCOL, "FC");
|
|
|
|
fchdr.r_ctl = tvb_get_guint8 (tvb, offset);
|
|
|
|
/* If the R_CTL is the EISL field, skip the first 8 bytes to retrieve the
|
|
* real FC header. EISL is Cisco-proprietary and is not decoded.
|
|
*/
|
|
if (fchdr.r_ctl == FC_RCTL_EISL) {
|
|
eisl_offset = offset;
|
|
offset += 8;
|
|
fchdr.r_ctl = tvb_get_guint8 (tvb, offset);
|
|
}
|
|
|
|
SET_ADDRESS (&pinfo->dst, AT_FC, 3, tvb_get_ptr(tvb,offset+1,3));
|
|
SET_ADDRESS (&fchdr.d_id, AT_FC, 3, tvb_get_ptr(tvb,offset+1,3));
|
|
SET_ADDRESS (&pinfo->src, AT_FC, 3, tvb_get_ptr(tvb,offset+5,3));
|
|
SET_ADDRESS (&fchdr.s_id, AT_FC, 3, tvb_get_ptr(tvb,offset+5,3));
|
|
fchdr.cs_ctl = tvb_get_guint8 (tvb, offset+4);
|
|
fchdr.type = tvb_get_guint8 (tvb, offset+8);
|
|
fchdr.fctl=tvb_get_ntoh24(tvb,offset+9);
|
|
fchdr.seqcnt = tvb_get_ntohs (tvb, offset+14);
|
|
fchdr.oxid=tvb_get_ntohs(tvb,offset+16);
|
|
fchdr.rxid=tvb_get_ntohs(tvb,offset+18);
|
|
param = tvb_get_ntohl (tvb, offset+20);
|
|
seq_id = tvb_get_guint8 (tvb, offset+12);
|
|
|
|
pinfo->oxid = fchdr.oxid;
|
|
pinfo->rxid = fchdr.rxid;
|
|
pinfo->ptype = PT_EXCHG;
|
|
pinfo->r_ctl = fchdr.r_ctl;
|
|
|
|
is_ack = ((fchdr.r_ctl == 0xC0) || (fchdr.r_ctl == 0xC1));
|
|
|
|
/* There are two ways to determine if this is the first frame of a
|
|
* sequence. Either:
|
|
* (i) The SOF bits indicate that this is the first frame OR
|
|
* (ii) This is an SOFf frame and seqcnt is 0.
|
|
*/
|
|
is_1frame_inseq = (((pinfo->sof_eof & PINFO_SOF_FIRST_FRAME) == PINFO_SOF_FIRST_FRAME) ||
|
|
(((pinfo->sof_eof & PINFO_SOF_SOFF) == PINFO_SOF_SOFF) &&
|
|
(fchdr.seqcnt == 0)));
|
|
|
|
is_lastframe_inseq = ((pinfo->sof_eof & PINFO_EOF_LAST_FRAME) == PINFO_EOF_LAST_FRAME);
|
|
|
|
if ((pinfo->sof_eof & PINFO_SOF_SOFF) == PINFO_SOF_SOFF) {
|
|
is_lastframe_inseq = fchdr.fctl & FC_FCTL_SEQ_LAST;
|
|
}
|
|
is_valid_frame = ((pinfo->sof_eof & 0x40) == 0x40);
|
|
|
|
ftype = fc_get_ftype (fchdr.r_ctl, fchdr.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 ((fchdr.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);
|
|
}
|
|
|
|
/* Highlight EISL header, if present */
|
|
if (eisl_offset != -1) {
|
|
proto_tree_add_item (fc_tree, hf_fc_eisl, tvb, eisl_offset, 8, 0);
|
|
}
|
|
|
|
/* match first exchange with last exchange */
|
|
if(fchdr.fctl&FC_FCTL_EXCHANGE_FIRST){
|
|
if(!pinfo->fd->flags.visited){
|
|
fc_exchange_data fced, *old_fced;
|
|
|
|
/* first check if we already have seen this exchange and it
|
|
is still open/unmatched.
|
|
*/
|
|
fced.oxid=fchdr.oxid;
|
|
SET_ADDRESS(&fced.s_id, fchdr.s_id.type, fchdr.s_id.len, fchdr.s_id.data);
|
|
SET_ADDRESS(&fced.d_id, fchdr.d_id.type, fchdr.d_id.len, fchdr.d_id.data);
|
|
old_fced=g_hash_table_lookup(fc_exchange_unmatched, &fced);
|
|
if(old_fced){
|
|
g_hash_table_remove(fc_exchange_unmatched, old_fced);
|
|
}
|
|
old_fced=g_mem_chunk_alloc(fc_exchange_vals);
|
|
old_fced->oxid=fchdr.oxid;
|
|
COPY_ADDRESS(&old_fced->s_id, &fchdr.s_id);
|
|
COPY_ADDRESS(&old_fced->d_id, &fchdr.d_id);
|
|
old_fced->first_exchange_frame=pinfo->fd->num;
|
|
old_fced->fc_time.nsecs = pinfo->fd->abs_usecs*1000;
|
|
old_fced->fc_time.secs = pinfo->fd->abs_secs;
|
|
g_hash_table_insert(fc_exchange_unmatched, old_fced, old_fced);
|
|
fc_ex=old_fced;
|
|
} else {
|
|
fc_exchange_data fced, *old_fced;
|
|
fced.oxid=fchdr.oxid;
|
|
fced.first_exchange_frame=pinfo->fd->num;
|
|
fced.last_exchange_frame=0;
|
|
old_fced=g_hash_table_lookup(fc_exchange_matched, &fced);
|
|
fc_ex=old_fced;
|
|
}
|
|
}
|
|
if(fchdr.fctl&FC_FCTL_EXCHANGE_LAST){
|
|
if(!pinfo->fd->flags.visited){
|
|
fc_exchange_data fced, *old_fced;
|
|
|
|
fced.oxid=fchdr.oxid;
|
|
SET_ADDRESS(&fced.s_id, fchdr.d_id.type, fchdr.d_id.len, fchdr.d_id.data);
|
|
SET_ADDRESS(&fced.d_id, fchdr.s_id.type, fchdr.s_id.len, fchdr.s_id.data);
|
|
old_fced=g_hash_table_lookup(fc_exchange_unmatched, &fced);
|
|
if(old_fced){
|
|
g_hash_table_remove(fc_exchange_unmatched, old_fced);
|
|
old_fced->last_exchange_frame=pinfo->fd->num;
|
|
g_hash_table_insert(fc_exchange_matched, old_fced, old_fced);
|
|
}
|
|
fc_ex=old_fced;
|
|
} else {
|
|
fc_exchange_data fced, *old_fced;
|
|
fced.oxid=fchdr.oxid;
|
|
fced.first_exchange_frame=0;
|
|
fced.last_exchange_frame=pinfo->fd->num;
|
|
old_fced=g_hash_table_lookup(fc_exchange_matched, &fced);
|
|
fc_ex=old_fced;
|
|
}
|
|
}
|
|
if(fc_ex){
|
|
if(fchdr.fctl&FC_FCTL_EXCHANGE_FIRST){
|
|
proto_tree_add_uint(fc_tree, hf_fc_exchange_last_frame, tvb, 0, 0, fc_ex->last_exchange_frame);
|
|
}
|
|
if(fchdr.fctl&FC_FCTL_EXCHANGE_LAST){
|
|
nstime_t delta_time;
|
|
proto_tree_add_uint(fc_tree, hf_fc_exchange_first_frame, tvb, 0, 0, fc_ex->first_exchange_frame);
|
|
delta_time.secs = pinfo->fd->abs_secs - fc_ex->fc_time.secs;
|
|
delta_time.nsecs = pinfo->fd->abs_usecs*1000 - fc_ex->fc_time.nsecs;
|
|
if (delta_time.nsecs<0){
|
|
delta_time.nsecs+=1000000000;
|
|
delta_time.secs--;
|
|
}
|
|
proto_tree_add_time(ti, hf_fc_time, tvb, 0, 0, &delta_time);
|
|
}
|
|
}
|
|
fchdr.fced=fc_ex;
|
|
|
|
switch (fchdr.r_ctl & 0xF0) {
|
|
|
|
case FC_RCTL_DEV_DATA:
|
|
case FC_RCTL_LINK_DATA:
|
|
case FC_RCTL_VIDEO:
|
|
/* the lower 4 bits of R_CTL are the information category */
|
|
proto_tree_add_uint_format (fc_tree, hf_fc_rctl, tvb, offset,
|
|
FC_RCTL_SIZE, fchdr.r_ctl,
|
|
"R_CTL: 0x%x(%s/%s)",
|
|
fchdr.r_ctl,
|
|
val_to_str ((fchdr.r_ctl & 0xF0),
|
|
fc_routing_val, "0x%x"),
|
|
val_to_str ((fchdr.r_ctl & 0x0F),
|
|
fc_iu_val, "0x%x"));
|
|
break;
|
|
|
|
case FC_RCTL_LINK_CTL:
|
|
/* 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, fchdr.r_ctl,
|
|
"R_CTL: 0x%x(%s/%s)",
|
|
fchdr.r_ctl,
|
|
val_to_str ((fchdr.r_ctl & 0xF0),
|
|
fc_routing_val, "0x%x"),
|
|
val_to_str ((fchdr.r_ctl & 0x0F),
|
|
fc_lctl_proto_val, "0x%x"));
|
|
break;
|
|
|
|
case FC_RCTL_BLS:
|
|
switch (fchdr.type) {
|
|
|
|
case 0x00:
|
|
/* 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, fchdr.r_ctl,
|
|
"R_CTL: 0x%x(%s/%s)",
|
|
fchdr.r_ctl,
|
|
val_to_str ((fchdr.r_ctl & 0xF0),
|
|
fc_routing_val, "0x%x"),
|
|
val_to_str ((fchdr.r_ctl & 0x0F),
|
|
fc_bls_proto_val, "0x%x"));
|
|
break;
|
|
|
|
default:
|
|
proto_tree_add_uint_format (fc_tree, hf_fc_rctl, tvb, offset,
|
|
FC_RCTL_SIZE, fchdr.r_ctl,
|
|
"R_CTL: 0x%x(%s/0x%x)",
|
|
fchdr.r_ctl,
|
|
val_to_str ((fchdr.r_ctl & 0xF0),
|
|
fc_routing_val, "0x%x"),
|
|
fchdr.r_ctl & 0x0F);
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case FC_RCTL_ELS:
|
|
switch (fchdr.type) {
|
|
|
|
case 0x01:
|
|
/* the lower 4 bits of R_CTL indicate the type of ELS frame */
|
|
proto_tree_add_uint_format (fc_tree, hf_fc_rctl, tvb, offset,
|
|
FC_RCTL_SIZE, fchdr.r_ctl,
|
|
"R_CTL: 0x%x(%s/%s)",
|
|
fchdr.r_ctl,
|
|
val_to_str ((fchdr.r_ctl & 0xF0),
|
|
fc_routing_val, "0x%x"),
|
|
val_to_str ((fchdr.r_ctl & 0x0F),
|
|
fc_els_proto_val, "0x%x"));
|
|
break;
|
|
|
|
default:
|
|
proto_tree_add_uint_format (fc_tree, hf_fc_rctl, tvb, offset,
|
|
FC_RCTL_SIZE, fchdr.r_ctl,
|
|
"R_CTL: 0x%x(%s/0x%x)",
|
|
fchdr.r_ctl,
|
|
val_to_str ((fchdr.r_ctl & 0xF0),
|
|
fc_routing_val, "0x%x"),
|
|
fchdr.r_ctl & 0x0F);
|
|
break;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
proto_tree_add_uint_format (fc_tree, hf_fc_rctl, tvb, offset,
|
|
FC_RCTL_SIZE, fchdr.r_ctl,
|
|
"R_CTL: 0x%x(%s/0x%x)",
|
|
fchdr.r_ctl,
|
|
val_to_str ((fchdr.r_ctl & 0xF0),
|
|
fc_routing_val, "0x%x"),
|
|
fchdr.r_ctl & 0x0F);
|
|
break;
|
|
}
|
|
|
|
proto_tree_add_uint_hidden (fc_tree, hf_fc_ftype, tvb, offset, 1,
|
|
ftype);
|
|
|
|
/* XXX - use "fc_wka_vals[]" on this? */
|
|
proto_tree_add_string (fc_tree, hf_fc_did, tvb, offset+1, 3,
|
|
fc_to_str (fchdr.d_id.data));
|
|
proto_tree_add_string_hidden (fc_tree, hf_fc_id, tvb, offset+1, 3,
|
|
fc_to_str (fchdr.d_id.data));
|
|
|
|
proto_tree_add_uint (fc_tree, hf_fc_csctl, tvb, offset+4, 1, fchdr.cs_ctl);
|
|
|
|
/* XXX - use "fc_wka_vals[]" on this? */
|
|
proto_tree_add_string (fc_tree, hf_fc_sid, tvb, offset+5, 3,
|
|
fc_to_str (fchdr.s_id.data));
|
|
proto_tree_add_string_hidden (fc_tree, hf_fc_id, tvb, offset+5, 3,
|
|
fc_to_str (fchdr.s_id.data));
|
|
|
|
if (ftype == FC_FTYPE_LINKCTL) {
|
|
if (((fchdr.r_ctl & 0x0F) == FC_LCTL_FBSYB) ||
|
|
((fchdr.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,
|
|
fchdr.type,"Type: 0x%x(%s)", fchdr.type,
|
|
fclctl_get_typestr ((guint8) (fchdr.r_ctl & 0x0F),
|
|
fchdr.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);
|
|
}
|
|
|
|
|
|
dissect_fc_fctl(pinfo, fc_tree, tvb, offset+9, is_ack, fchdr.fctl);
|
|
|
|
|
|
proto_tree_add_item (fc_tree, hf_fc_seqid, tvb, offset+12, 1, FALSE);
|
|
|
|
df_ctl = tvb_get_guint8(tvb, offset+13);
|
|
|
|
proto_tree_add_uint (fc_tree, hf_fc_dfctl, tvb, offset+13, 1, df_ctl);
|
|
proto_tree_add_uint (fc_tree, hf_fc_seqcnt, tvb, offset+14, 2, fchdr.seqcnt);
|
|
proto_tree_add_uint (fc_tree, hf_fc_oxid, tvb, offset+16, 2, fchdr.oxid);
|
|
proto_tree_add_uint (fc_tree, hf_fc_rxid, tvb, offset+18, 2, fchdr.rxid);
|
|
|
|
if (ftype == FC_FTYPE_LINKCTL) {
|
|
if (((fchdr.r_ctl & 0x0F) == FC_LCTL_FRJT) ||
|
|
((fchdr.r_ctl & 0x0F) == FC_LCTL_PRJT) ||
|
|
((fchdr.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 ((fchdr.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 ((fchdr.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 {
|
|
/* XXX is this right? offset 20, shouldnt it be offset 9? */
|
|
is_exchg_resp = ((tvb_get_guint8 (tvb, offset+20) & 0x80) == 0x80);
|
|
}
|
|
|
|
frag_size = tvb_reported_length (tvb)-FC_HEADER_SIZE;
|
|
|
|
/* If there is an MDS header, we need to subtract the MDS trailer size */
|
|
if ((pinfo->ethertype == ETHERTYPE_UNK) || (pinfo->ethertype == ETHERTYPE_FCFT)) {
|
|
frag_size -= MDSHDR_TRAILER_SIZE;
|
|
} else if (pinfo->ethertype == ETHERTYPE_BRDWALK) {
|
|
frag_size -= 8; /* 4 byte of FC CRC +
|
|
4 bytes of error+EOF = 8 bytes */
|
|
}
|
|
|
|
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) &&
|
|
(!is_lastframe_inseq || !is_1frame_inseq) && fc_reassemble &&
|
|
tvb_bytes_exist(tvb, FC_HEADER_SIZE, frag_size) && tree) {
|
|
/* Add this to the list of fragments */
|
|
|
|
/* In certain cases such as FICON, the SEQ_CNT is streaming
|
|
* i.e. continuously increasing. So, zero does not signify the
|
|
* first frame of the sequence. To fix this, we need to save the
|
|
* SEQ_CNT of the first frame in sequence and use this value to
|
|
* determine the actual offset into a frame.
|
|
*/
|
|
conversation = find_conversation (&pinfo->src, &pinfo->dst,
|
|
pinfo->ptype, pinfo->oxid,
|
|
pinfo->rxid, NO_PORT2);
|
|
if (!conversation) {
|
|
conversation = conversation_new (&pinfo->src, &pinfo->dst,
|
|
pinfo->ptype, pinfo->oxid,
|
|
pinfo->rxid, NO_PORT2);
|
|
}
|
|
|
|
ckey.conv_idx = conversation->index;
|
|
|
|
cdata = (fcseq_conv_data_t *)g_hash_table_lookup (fcseq_req_hash,
|
|
&ckey);
|
|
|
|
if (is_1frame_inseq) {
|
|
if (cdata) {
|
|
/* Since we never free the memory used by an exchange, this maybe a
|
|
* case of another request using the same exchange as a previous
|
|
* req.
|
|
*/
|
|
cdata->seq_cnt = fchdr.seqcnt;
|
|
}
|
|
else {
|
|
req_key = g_mem_chunk_alloc (fcseq_req_keys);
|
|
req_key->conv_idx = conversation->index;
|
|
|
|
cdata = g_mem_chunk_alloc (fcseq_req_vals);
|
|
cdata->seq_cnt = fchdr.seqcnt;
|
|
|
|
g_hash_table_insert (fcseq_req_hash, req_key, cdata);
|
|
}
|
|
real_seqcnt = 0;
|
|
}
|
|
else if (cdata != NULL) {
|
|
real_seqcnt = fchdr.seqcnt - cdata->seq_cnt ;
|
|
}
|
|
else {
|
|
real_seqcnt = fchdr.seqcnt;
|
|
}
|
|
|
|
frag_id = ((pinfo->oxid << 16) ^ seq_id) | 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,
|
|
real_seqcnt * fc_max_frame_size,
|
|
frag_size,
|
|
!is_lastframe_inseq);
|
|
|
|
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 ((fchdr.r_ctl & 0x0F) == FC_BLS_BAACC) {
|
|
dissect_fc_ba_acc (next_tvb, pinfo, tree);
|
|
} else if ((fchdr.r_ctl & 0x0F) == FC_BLS_BARJT) {
|
|
dissect_fc_ba_rjt (next_tvb, pinfo, tree);
|
|
}
|
|
}
|
|
|
|
tap_queue_packet(fc_tap, pinfo, &fchdr);
|
|
}
|
|
|
|
|
|
/* 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_id,
|
|
{"Addr", "fc.id", FT_STRING, BASE_HEX, NULL, 0x0,
|
|
"Source or Destination 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_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}},
|
|
{ &hf_fc_fctl_exchange_responder,
|
|
{"ExgRpd", "fc.fctl.exchange_responder", FT_BOOLEAN, 24, TFS(&tfs_fc_fctl_exchange_responder),
|
|
FC_FCTL_EXCHANGE_RESPONDER, "Exchange Responder?", HFILL}},
|
|
{ &hf_fc_fctl_seq_recipient,
|
|
{"SeqRec", "fc.fctl.seq_recipient", FT_BOOLEAN, 24, TFS(&tfs_fc_fctl_seq_recipient),
|
|
FC_FCTL_SEQ_RECIPIENT, "Seq Recipient?", HFILL}},
|
|
{ &hf_fc_fctl_exchange_first,
|
|
{"ExgFst", "fc.fctl.exchange_first", FT_BOOLEAN, 24, TFS(&tfs_fc_fctl_exchange_first),
|
|
FC_FCTL_EXCHANGE_FIRST, "First Exchange?", HFILL}},
|
|
{ &hf_fc_fctl_exchange_last,
|
|
{"ExgLst", "fc.fctl.exchange_last", FT_BOOLEAN, 24, TFS(&tfs_fc_fctl_exchange_last),
|
|
FC_FCTL_EXCHANGE_LAST, "Last Exchange?", HFILL}},
|
|
{ &hf_fc_fctl_seq_last,
|
|
{"SeqLst", "fc.fctl.seq_last", FT_BOOLEAN, 24, TFS(&tfs_fc_fctl_seq_last),
|
|
FC_FCTL_SEQ_LAST, "Last Sequence?", HFILL}},
|
|
{ &hf_fc_fctl_priority,
|
|
{"Pri", "fc.fctl.priority", FT_BOOLEAN, 24, TFS(&tfs_fc_fctl_priority),
|
|
FC_FCTL_PRIORITY, "Priority", HFILL}},
|
|
{ &hf_fc_fctl_transfer_seq_initiative,
|
|
{"TSI", "fc.fctl.transfer_seq_initiative", FT_BOOLEAN, 24, TFS(&tfs_fc_fctl_transfer_seq_initiative),
|
|
FC_FCTL_TRANSFER_SEQ_INITIATIVE, "Transfer Seq Initiative", HFILL}},
|
|
{ &hf_fc_fctl_rexmitted_seq,
|
|
{"RetSeq", "fc.fctl.rexmitted_seq", FT_BOOLEAN, 24, TFS(&tfs_fc_fctl_rexmitted_seq),
|
|
FC_FCTL_REXMITTED_SEQ, "Retransmitted Sequence", HFILL}},
|
|
{ &hf_fc_fctl_rel_offset,
|
|
{"RelOff", "fc.fctl.rel_offset", FT_BOOLEAN, 24, TFS(&tfs_fc_fctl_rel_offset),
|
|
FC_FCTL_REL_OFFSET, "rel offset", HFILL}},
|
|
{ &hf_fc_fctl_last_data_frame,
|
|
{"LDF", "fc.fctl.last_data_frame", FT_UINT24, BASE_HEX, VALS(last_data_frame_vals),
|
|
FC_FCTL_LAST_DATA_FRAME_MASK, "Last Data Frame?", HFILL}},
|
|
{ &hf_fc_fctl_ack_0_1,
|
|
{"A01", "fc.fctl.ack_0_1", FT_UINT24, BASE_HEX, VALS(ack_0_1_vals),
|
|
FC_FCTL_ACK_0_1_MASK, "Ack 0/1 value", HFILL}},
|
|
{ &hf_fc_fctl_abts_ack,
|
|
{"AA", "fc.fctl.abts_ack", FT_UINT24, BASE_HEX, VALS(abts_ack_vals),
|
|
FC_FCTL_ABTS_MASK, "ABTS ACK values", HFILL}},
|
|
{ &hf_fc_fctl_abts_not_ack,
|
|
{"AnA", "fc.fctl.abts_not_ack", FT_UINT24, BASE_HEX, VALS(abts_not_ack_vals),
|
|
FC_FCTL_ABTS_MASK, "ABTS not ACK vals", HFILL}},
|
|
{ &hf_fc_exchange_first_frame,
|
|
{ "Exchange First In", "fc.exchange_first_frame", FT_FRAMENUM, BASE_NONE, NULL,
|
|
0, "The first frame of this exchange is in this frame", HFILL }},
|
|
{ &hf_fc_exchange_last_frame,
|
|
{ "Exchange Last In", "fc.exchange_last_frame", FT_FRAMENUM, BASE_NONE, NULL,
|
|
0, "The last frame of this exchange is in this frame", HFILL }},
|
|
{ &hf_fc_time,
|
|
{ "Time from Exchange First", "fc.time", FT_RELATIVE_TIME, BASE_NONE, NULL,
|
|
0, "Time since the first frame of the Exchange", HFILL }},
|
|
{ &hf_fc_eisl,
|
|
{"EISL Header", "fc.eisl", FT_BYTES, BASE_HEX, NULL, 0, "EISL Header", HFILL}},
|
|
};
|
|
|
|
/* Setup protocol subtree array */
|
|
static gint *ett[] = {
|
|
&ett_fc,
|
|
&ett_fcbls,
|
|
&ett_fctl
|
|
};
|
|
|
|
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);
|
|
fc_tap = register_tap("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",
|
|
"Reassemble multi-frame sequences",
|
|
"If enabled, reassembly of multi-frame "
|
|
"sequences is done",
|
|
&fc_reassemble);
|
|
prefs_register_uint_preference (fc_module,
|
|
"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);
|
|
register_init_routine (fc_exchange_init_protocol);
|
|
}
|
|
|
|
|
|
/* 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)
|
|
{
|
|
data_handle = find_dissector("data");
|
|
}
|