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wireshark/epan/dissectors/packet-fc.c

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/* packet-fc.c
* Routines for Fibre Channel Decoding (FC Header, Link Ctl & Basic Link Svc)
* Copyright 2001, Dinesh G Dutt <ddutt@cisco.com>
* Copyright 2003 Ronnie Sahlberg, exchange first/last matching and
* tap listener and misc updates
*
* $Id$
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "config.h"
#include <glib.h>
#include <epan/packet.h>
#include <epan/prefs.h>
#include <epan/reassemble.h>
#include <epan/conversation.h>
#include <epan/etypes.h>
#include "packet-scsi.h"
#include "packet-fc.h"
#include "packet-fclctl.h"
#include "packet-fcbls.h"
#include <epan/tap.h>
#include <epan/wmem/wmem.h>
#include <epan/crc32-tvb.h>
#include <epan/expert.h>
#define FC_HEADER_SIZE 24
#define FC_RCTL_VFT 0x50
#define MDSHDR_TRAILER_SIZE 6
/* Size of various fields in FC header in bytes */
#define FC_RCTL_SIZE 1
#define FC_DID_SIZE 3
#define FC_CSCTL_SIZE 1
#define FC_SID_SIZE 3
#define FC_TYPE_SIZE 1
#define FC_FCTL_SIZE 3
#define FC_SEQID_SIZE 1
#define FC_DFCTL_SIZE 1
#define FC_SEQCNT_SIZE 2
#define FC_OXID_SIZE 2
#define FC_RXID_SIZE 2
#define FC_PARAM_SIZE 4
/* Initialize the protocol and registered fields */
static int proto_fc = -1;
static int hf_fc_time = -1;
static int hf_fc_exchange_first_frame = -1;
static int hf_fc_exchange_last_frame = -1;
static int hf_fc_rctl = -1;
static int hf_fc_did = -1;
static int hf_fc_csctl = -1;
static int hf_fc_sid = -1;
static int hf_fc_id = -1;
static int hf_fc_type = -1;
static int hf_fc_fctl = -1;
static int hf_fc_fctl_exchange_responder = -1;
static int hf_fc_fctl_seq_recipient = -1;
static int hf_fc_fctl_exchange_first = -1;
static int hf_fc_fctl_exchange_last = -1;
static int hf_fc_fctl_seq_last = -1;
static int hf_fc_fctl_priority = -1;
static int hf_fc_fctl_transfer_seq_initiative = -1;
static int hf_fc_fctl_rexmitted_seq = -1;
static int hf_fc_fctl_rel_offset = -1;
static int hf_fc_fctl_abts_ack = -1;
/* static int hf_fc_fctl_abts_not_ack = -1; */
static int hf_fc_fctl_last_data_frame = -1;
static int hf_fc_fctl_ack_0_1 = -1;
static int hf_fc_seqid = -1;
static int hf_fc_dfctl = -1;
static int hf_fc_seqcnt = -1;
static int hf_fc_oxid = -1;
static int hf_fc_rxid = -1;
static int hf_fc_param = -1;
static int hf_fc_ftype = -1; /* Derived field, non-existent in FC hdr */
static int hf_fc_reassembled = -1;
static int hf_fc_relative_offset = -1;
/* VFT fields */
static int hf_fc_vft = -1;
static int hf_fc_vft_rctl = -1;
static int hf_fc_vft_ver = -1;
static int hf_fc_vft_type = -1;
static int hf_fc_vft_pri = -1;
static int hf_fc_vft_vf_id = -1;
static int hf_fc_vft_hop_ct = -1;
/* Network_Header fields */
static int hf_fc_nh_da = -1;
static int hf_fc_nh_sa = -1;
/* For Basic Link Svc */
static int hf_fc_bls_seqid_vld = -1;
static int hf_fc_bls_lastvld_seqid = -1;
static int hf_fc_bls_oxid = -1;
static int hf_fc_bls_rxid = -1;
static int hf_fc_bls_lowseqcnt = -1;
static int hf_fc_bls_hiseqcnt = -1;
static int hf_fc_bls_rjtcode = -1;
static int hf_fc_bls_rjtdetail = -1;
static int hf_fc_bls_vendor = -1;
/* For FC SOF */
static int proto_fcsof = -1;
static int hf_fcsof = -1;
static int hf_fceof = -1;
static int hf_fccrc = -1;
static int ett_fcsof = -1;
static int ett_fceof = -1;
static int ett_fccrc = -1;
/* Initialize the subtree pointers */
static gint ett_fc = -1;
static gint ett_fctl = -1;
static gint ett_fcbls = -1;
static gint ett_fc_vft = -1;
static expert_field ei_fccrc = EI_INIT;
static dissector_handle_t fc_handle, fcsof_handle;
static dissector_table_t fcftype_dissector_table;
static dissector_handle_t data_handle;
static int fc_tap = -1;
typedef struct _fc_conv_data_t {
wmem_tree_t *exchanges;
} fc_conv_data_t;
/* Reassembly stuff */
static gboolean fc_reassemble = TRUE;
static guint32 fc_max_frame_size = 1024;
static reassembly_table fc_reassembly_table;
typedef struct _fcseq_conv_key {
guint32 conv_idx;
} fcseq_conv_key_t;
typedef struct _fcseq_conv_data {
guint32 seq_cnt;
} fcseq_conv_data_t;
static GHashTable *fcseq_req_hash = NULL;
/*
* Hash Functions
*/
static gint
fcseq_equal(gconstpointer v, gconstpointer w)
{
const fcseq_conv_key_t *v1 = (const fcseq_conv_key_t *)v;
const fcseq_conv_key_t *v2 = (const fcseq_conv_key_t *)w;
return (v1->conv_idx == v2->conv_idx);
}
static guint
fcseq_hash (gconstpointer v)
{
const fcseq_conv_key_t *key = (const fcseq_conv_key_t *)v;
guint val;
val = key->conv_idx;
return val;
}
static void
fc_exchange_init_protocol(void)
{
reassembly_table_init(&fc_reassembly_table,
&addresses_reassembly_table_functions);
if (fcseq_req_hash)
g_hash_table_destroy(fcseq_req_hash);
fcseq_req_hash = g_hash_table_new(fcseq_hash, fcseq_equal);
}
const value_string fc_fc4_val[] = {
{FC_TYPE_BLS, "Basic Link Svc"},
{FC_TYPE_ELS, "Ext Link Svc"},
{FC_TYPE_LLCSNAP, "LLC_SNAP"},
{FC_TYPE_IP, "IP/FC"},
{FC_TYPE_SCSI, "FCP"},
{FC_TYPE_FCCT, "FC_CT"},
{FC_TYPE_SWILS, "SW_ILS"},
{FC_TYPE_AL, "AL"},
{FC_TYPE_SNMP, "SNMP"},
{FC_TYPE_SB_FROM_CU, "SB-3(CU->Channel)"},
{FC_TYPE_SB_TO_CU, "SB-3(Channel->CU)"},
{0, NULL}
};
static const value_string fc_ftype_vals [] = {
{FC_FTYPE_UNDEF , "Unknown frame"},
{FC_FTYPE_SWILS, "SW_ILS"},
{FC_FTYPE_IP , "IP/FC"},
{FC_FTYPE_SCSI , "FCP"},
{FC_FTYPE_BLS , "Basic Link Svc"},
{FC_FTYPE_ELS , "ELS"},
{FC_FTYPE_FCCT , "FC_CT"},
{FC_FTYPE_LINKDATA, "Link Data"},
{FC_FTYPE_VDO, "Video Data"},
{FC_FTYPE_LINKCTL, "Link Ctl"},
{FC_FTYPE_SBCCS, "SBCCS"},
{FC_FTYPE_OHMS, "OHMS(Cisco MDS)"},
{0, NULL}
};
static const value_string fc_wka_vals[] _U_ = {
{FC_WKA_MULTICAST, "Multicast Server"},
{FC_WKA_CLKSYNC, "Clock Sync Server"},
{FC_WKA_KEYDIST, "Key Distribution Server"},
{FC_WKA_ALIAS, "Alias Server"},
{FC_WKA_QOSF, "QoS Facilitator"},
{FC_WKA_MGMT, "Management Server"},
{FC_WKA_TIME, "Time Server"},
{FC_WKA_DNS, "Directory Server"},
{FC_WKA_FABRIC_CTRLR, "Fabric Ctlr"},
{FC_WKA_FPORT, "F_Port Server"},
{FC_WKA_BCAST, "Broadcast ID"},
{0, NULL}
};
static const value_string fc_routing_val[] = {
{FC_RCTL_DEV_DATA, "Device_Data"},
{FC_RCTL_ELS, "Extended Link Services"},
{FC_RCTL_LINK_DATA, "FC-4 Link_Data"},
{FC_RCTL_VIDEO, "Video_Data"},
{FC_RCTL_BLS, "Basic Link Services"},
{FC_RCTL_LINK_CTL, "Link_Control Frame"},
{0, NULL}
};
static const value_string fc_iu_val[] = {
{FC_IU_UNCATEGORIZED , "Uncategorized Data"},
{FC_IU_SOLICITED_DATA , "Solicited Data"},
{FC_IU_UNSOLICITED_CTL , "Unsolicited Control"},
{FC_IU_SOLICITED_CTL , "Solicited Control"},
{FC_IU_UNSOLICITED_DATA, "Solicited Data"},
{FC_IU_DATA_DESCRIPTOR , "Data Descriptor"},
{FC_IU_UNSOLICITED_CMD , "Unsolicited Command"},
{FC_IU_CMD_STATUS , "Command Status"},
{0, NULL}
};
/* For FC SOF */
#define FC_SOFC1 0xBCB51717
#define FC_SOFI1 0xBCB55757
#define FC_SOFN1 0xBCB53737
#define FC_SOFI2 0xBCB55555
#define FC_SOFN2 0xBCB53535
#define FC_SOFI3 0xBCB55656
#define FC_SOFN3 0xBCB53636
#define FC_SOFC4 0xBCB51919
#define FC_SOFI4 0xBCB55959
#define FC_SOFN4 0xBCB53939
#define FC_SOFF 0xBCB55858
#define EOFT_NEG 0xBC957575
#define EOFT_POS 0xBCB57575
#define EOFDT_NEG 0xBC959595
#define EOFDT_POS 0xBCB59595
#define EOFA_NEG 0xBC95F5F5
#define EOFA_POS 0xBCB5F5F5
#define EOFN_NEG 0xBC95D5D5
#define EOFN_POS 0xBCB5D5D5
#define EOFNI_NEG 0xBC8AD5D5
#define EOFNI_POS 0xBCAAD5D5
#define EOFDTI_NEG 0xBC8A9595
#define EOFDTI_POS 0xBCAA9595
#define EOFRT_NEG 0xBC959999
#define EOFRT_POS 0xBCB59999
#define EOFRTI_NEG 0xBC8A9999
#define EOFRTI_POS 0xBCAA9999
static const value_string fc_sof_vals[] = {
{FC_SOFC1, "SOFc1 - SOF Connect Class 1 (Obsolete)" },
{FC_SOFI1, "SOFi1 - SOF Initiate Class 1 (Obsolete)" },
{FC_SOFN1, "SOFn1 - SOF Normal Class 1 (Obsolete)" },
{FC_SOFI2, "SOFi2 - SOF Initiate Class 2" },
{FC_SOFN2, "SOFn2 - SOF Normal Class 2" },
{FC_SOFI3, "SOFi3 - SOF Initiate Class 3" },
{FC_SOFN3, "SOFn3 - SOF Normal Class 3" },
{FC_SOFC4, "SOFc4 - SOF Activate Class 4 (Obsolete)" },
{FC_SOFI4, "SOFi4 - SOF Initiate Class 4 (Obsolete)" },
{FC_SOFN4, "SOFn4 - SOF Normal Class 4 (Obsolete)" },
{FC_SOFF, "SOFf - SOF Fabric" },
{0, NULL}
};
static const value_string fc_eof_vals[] = {
{EOFT_NEG, "EOFt- - EOF Terminate" },
{EOFT_POS, "EOFt+ - EOF Terminate" },
{EOFDT_NEG, "EOFdt- - EOF Disconnect-Terminate-Class 1 (Obsolete)" },
{EOFDT_POS, "EOFdt+ - EOF Disconnect-Terminate-Class 1 (Obsolete)" },
{EOFA_NEG, "EOFa- - EOF Abort" },
{EOFA_POS, "EOFa+ - EOF Abort" },
{EOFN_NEG, "EOFn- - EOF Normal" },
{EOFN_POS, "EOFn+ - EOF Normal" },
{EOFNI_NEG, "EOFni- - EOF Normal Invalid" },
{EOFNI_POS, "EOFni+ - EOF Normal Invalid" },
{EOFDTI_NEG, "EOFdti- - EOF Disconnect-Terminate-Invalid Class 1 (Obsolete)" },
{EOFDTI_POS, "EOFdti+ - EOF Disconnect-Terminate-Invalid Class 1 (Obsolete)" },
{EOFRT_NEG, "EOFrt- - EOF Remove-Terminate Class 4 (Obsolete)" },
{EOFRT_POS, "EOFrt+ - EOF Remove-Terminate Class 4 (Obsolete)" },
{EOFRTI_NEG, "EOFrti- - EOF Remove-Terminate Invalid Class 4 (Obsolete)" },
{EOFRTI_POS, "EOFrti+ - EOF Remove-Terminate Invalid Class 4 (Obsolete)" },
{0, NULL}
};
/* 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 */
col_set_str(pinfo->cinfo, COL_PROTOCOL, "BLS");
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, ENC_BIG_ENDIAN);
proto_tree_add_item (acc_tree, hf_fc_bls_lastvld_seqid, tvb, offset++, 1, ENC_BIG_ENDIAN);
offset += 2; /* Skip reserved field */
proto_tree_add_item (acc_tree, hf_fc_bls_oxid, tvb, offset, 2, ENC_BIG_ENDIAN);
offset += 2;
proto_tree_add_item (acc_tree, hf_fc_bls_rxid, tvb, offset, 2, ENC_BIG_ENDIAN);
offset += 2;
proto_tree_add_item (acc_tree, hf_fc_bls_lowseqcnt, tvb, offset, 2, ENC_BIG_ENDIAN);
offset += 2;
proto_tree_add_item (acc_tree, hf_fc_bls_hiseqcnt, tvb, offset, 2, ENC_BIG_ENDIAN);
}
}
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 */
col_set_str(pinfo->cinfo, COL_PROTOCOL, "BLS");
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, ENC_BIG_ENDIAN);
proto_tree_add_item (rjt_tree, hf_fc_bls_rjtdetail, tvb, offset+2, 1, ENC_BIG_ENDIAN);
proto_tree_add_item (rjt_tree, hf_fc_bls_vendor, tvb, offset+3, 1, ENC_BIG_ENDIAN);
}
}
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;
case FC_TYPE_VENDOR:
return FC_FTYPE_OHMS;
default:
return FC_FTYPE_UNDEF;
}
case FC_RCTL_ELS:
if (((r_ctl & 0x0F) == 0x2) || ((r_ctl & 0x0F) == 0x3))
return FC_FTYPE_ELS;
else if (type == FC_TYPE_ELS)
return FC_FTYPE_OHMS;
else
return FC_FTYPE_UNDEF;
case FC_RCTL_LINK_DATA:
switch (type) {
case FC_TYPE_SCSI:
return FC_FTYPE_SCSI;
default:
return FC_FTYPE_LINKDATA;
}
case FC_RCTL_VIDEO:
return FC_FTYPE_VDO;
case FC_RCTL_BLS:
if (type == 0)
return FC_FTYPE_BLS;
else
return FC_FTYPE_UNDEF;
case FC_RCTL_LINK_CTL:
return FC_FTYPE_LINKCTL;
default:
return FC_FTYPE_UNDEF;
}
}
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"
};
/*
* Dissect the VFT header.
*/
static void
dissect_fc_vft(proto_tree *parent_tree,
tvbuff_t *tvb, int offset)
{
proto_item *item = NULL;
proto_tree *tree = NULL;
guint8 rctl;
guint8 ver;
guint8 type;
guint8 pri;
guint16 vf_id;
guint8 hop_ct;
rctl = tvb_get_guint8(tvb, offset);
type = tvb_get_guint8(tvb, offset + 1);
ver = (type >> 6) & 3;
type = (type >> 2) & 0xf;
vf_id = tvb_get_ntohs(tvb, offset + 2);
pri = (vf_id >> 13) & 7;
vf_id = (vf_id >> 1) & 0xfff;
hop_ct = tvb_get_guint8(tvb, offset + 4);
if (parent_tree) {
item = proto_tree_add_uint_format_value(parent_tree, hf_fc_vft, tvb, offset,
8, vf_id, "VF_ID %d Pri %d Hop Count %d",
vf_id, pri, hop_ct);
tree = proto_item_add_subtree(item, ett_fc_vft);
}
proto_tree_add_uint(tree, hf_fc_vft_rctl, tvb, offset, 1, rctl);
proto_tree_add_uint(tree, hf_fc_vft_ver, tvb, offset + 1, 1, ver);
proto_tree_add_uint(tree, hf_fc_vft_type, tvb, offset + 1, 1, type);
proto_tree_add_uint(tree, hf_fc_vft_pri, tvb, offset + 2, 1, pri);
proto_tree_add_uint(tree, hf_fc_vft_vf_id, tvb, offset + 2, 2, vf_id);
proto_tree_add_uint(tree, hf_fc_vft_hop_ct, tvb, offset + 4, 1, hop_ct);
}
/* 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)
{
proto_item *item=NULL;
proto_tree *tree=NULL;
guint32 flags;
flags = tvb_get_guint8 (tvb, offset);
flags = (flags<<8) | tvb_get_guint8 (tvb, offset+1);
flags = (flags<<8) | tvb_get_guint8 (tvb, offset+2);
if(parent_tree){
item=proto_tree_add_uint(parent_tree, hf_fc_fctl, tvb, offset, 3, flags);
tree=proto_item_add_subtree(item, ett_fctl);
}
proto_tree_add_boolean(tree, hf_fc_fctl_exchange_responder, tvb, offset, 3, flags);
if (flags&FC_FCTL_EXCHANGE_RESPONDER){
proto_item_append_text(item, " Exchange Responder");
if (flags & (~( FC_FCTL_EXCHANGE_RESPONDER )))
proto_item_append_text(item, ",");
} else {
proto_item_append_text(item, " Exchange Originator");
if (flags & (~( FC_FCTL_EXCHANGE_RESPONDER )))
proto_item_append_text(item, ",");
}
flags&=(~( FC_FCTL_EXCHANGE_RESPONDER ));
proto_tree_add_boolean(tree, hf_fc_fctl_seq_recipient, tvb, offset, 3, flags);
if (flags&FC_FCTL_SEQ_RECIPIENT){
proto_item_append_text(item, " Seq Recipient");
if (flags & (~( FC_FCTL_SEQ_RECIPIENT )))
proto_item_append_text(item, ",");
} else {
proto_item_append_text(item, " Seq Initiator");
if (flags & (~( FC_FCTL_SEQ_RECIPIENT )))
proto_item_append_text(item, ",");
}
flags&=(~( FC_FCTL_SEQ_RECIPIENT ));
proto_tree_add_boolean(tree, hf_fc_fctl_exchange_first, tvb, offset, 3, flags);
if (flags&FC_FCTL_EXCHANGE_FIRST){
proto_item_append_text(item, " Exchg First");
if (flags & (~( FC_FCTL_EXCHANGE_FIRST )))
proto_item_append_text(item, ",");
}
flags&=(~( FC_FCTL_EXCHANGE_FIRST ));
proto_tree_add_boolean(tree, hf_fc_fctl_exchange_last, tvb, offset, 3, flags);
if (flags&FC_FCTL_EXCHANGE_LAST){
proto_item_append_text(item, " Exchg Last");
if (flags & (~( FC_FCTL_EXCHANGE_LAST )))
proto_item_append_text(item, ",");
}
flags&=(~( FC_FCTL_EXCHANGE_LAST ));
proto_tree_add_boolean(tree, hf_fc_fctl_seq_last, tvb, offset, 3, flags);
if (flags&FC_FCTL_SEQ_LAST){
proto_item_append_text(item, " Seq Last");
if (flags & (~( FC_FCTL_SEQ_LAST )))
proto_item_append_text(item, ",");
}
flags&=(~( FC_FCTL_SEQ_LAST ));
proto_tree_add_boolean(tree, hf_fc_fctl_priority, tvb, offset, 3, flags);
if (flags&FC_FCTL_PRIORITY){
proto_item_append_text(item, " Priority");
if (flags & (~( FC_FCTL_PRIORITY )))
proto_item_append_text(item, ",");
} else {
proto_item_append_text(item, " CS_CTL");
if (flags & (~( FC_FCTL_PRIORITY )))
proto_item_append_text(item, ",");
}
flags&=(~( FC_FCTL_PRIORITY ));
proto_tree_add_boolean(tree, hf_fc_fctl_transfer_seq_initiative, tvb, offset, 3, flags);
if (flags&FC_FCTL_TRANSFER_SEQ_INITIATIVE){
proto_item_append_text(item, " Transfer Seq Initiative");
if (flags & (~( FC_FCTL_TRANSFER_SEQ_INITIATIVE )))
proto_item_append_text(item, ",");
}
flags&=(~( FC_FCTL_TRANSFER_SEQ_INITIATIVE ));
proto_tree_add_uint(tree, hf_fc_fctl_last_data_frame, tvb, offset, 3, flags);
proto_tree_add_uint(tree, hf_fc_fctl_ack_0_1, tvb, offset, 3, flags);
proto_tree_add_boolean(tree, hf_fc_fctl_rexmitted_seq, tvb, offset, 3, flags);
if (flags&FC_FCTL_REXMITTED_SEQ){
proto_item_append_text(item, " Rexmitted Seq");
if (flags & (~( FC_FCTL_REXMITTED_SEQ )))
proto_item_append_text(item, ",");
}
flags&=(~( FC_FCTL_REXMITTED_SEQ ));
proto_tree_add_uint(tree, hf_fc_fctl_abts_ack, tvb, offset, 3, flags);
proto_tree_add_boolean(tree, hf_fc_fctl_rel_offset, tvb, offset, 3, flags);
if (flags&FC_FCTL_REL_OFFSET){
proto_item_append_text(item, " Rel Offset");
if (flags & (~( FC_FCTL_REL_OFFSET )))
proto_item_append_text(item, ",");
}
}
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_helper (tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, gboolean is_ifcp)
{
/* Set up structures needed to add the protocol subtree and manage it */
proto_item *ti=NULL, *hidden_item;
proto_tree *fc_tree = NULL;
tvbuff_t *next_tvb;
int offset = 0, next_offset;
int vft_offset = -1;
gboolean is_lastframe_inseq, is_1frame_inseq/*, is_valid_frame*/;
gboolean is_exchg_resp = 0;
fragment_head *fcfrag_head;
guint32 frag_id;
guint32 frag_size;
guint8 df_ctl, seq_id;
guint32 f_ctl;
guint32 param;
guint16 real_seqcnt;
guint8 ftype;
/*gboolean is_ack;*/
static fc_hdr fchdr;
itlq_nexus_t *fc_ex=NULL;
fc_conv_data_t *fc_conv_data=NULL;
conversation_t *conversation;
fcseq_conv_data_t *cdata;
fcseq_conv_key_t ckey, *req_key;
fchdr.itlq=NULL;
/* Make entries in Protocol column and Info column on summary display */
col_set_str(pinfo->cinfo, COL_PROTOCOL, "FC");
fchdr.r_ctl = tvb_get_guint8 (tvb, offset);
/*
* If the frame contains a VFT (virtual fabric tag), decode it
* as a separate header before the FC frame header.
*
* This used to be called the Cisco-proprietary EISL field, but is now
* standardized in FC-FS-2. See section 10.2.4.
*/
if (fchdr.r_ctl == FC_RCTL_VFT) {
pinfo->vsan = (tvb_get_ntohs(tvb, offset + 2) >> 1) & 0xfff;
vft_offset = offset;
offset += 8;
fchdr.r_ctl = tvb_get_guint8 (tvb, offset);
}
/* Each fc endpoint pair gets its own TCP session in iFCP but
* the src/dst ids are undefined(==semi-random) in the FC header.
* This means we can no track conversations for FC over iFCP by using
* the FC src/dst addresses.
* For iFCP: Do not update the pinfo src/dst struct and let it remain
* being tcpip src/dst so that request/response matching in the FCP layer
* will use ip addresses instead and still work.
*/
if(!is_ifcp){
TVB_SET_ADDRESS (&pinfo->dst, AT_FC, tvb, offset+1, 3);
TVB_SET_ADDRESS (&pinfo->src, AT_FC, tvb, offset+5, 3);
pinfo->srcport=0;
pinfo->destport=0;
}
SET_ADDRESS(&fchdr.d_id, pinfo->dst.type, pinfo->dst.len, pinfo->dst.data);
SET_ADDRESS(&fchdr.s_id, pinfo->src.type, pinfo->src.len, pinfo->src.data);
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);
fchdr.relative_offset=0;
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;
/* set up a conversation and conversation data */
/* TODO treat the fc address s_id==00.00.00 as a wildcard matching anything */
conversation=find_or_create_conversation(pinfo);
fc_conv_data=(fc_conv_data_t *)conversation_get_proto_data(conversation, proto_fc);
if(!fc_conv_data){
fc_conv_data=wmem_new(wmem_file_scope(), fc_conv_data_t);
fc_conv_data->exchanges=wmem_tree_new(wmem_file_scope());
conversation_add_proto_data(conversation, proto_fc, fc_conv_data);
}
/* set up the exchange data */
/* XXX we should come up with a way to handle when the 16bit oxid wraps
* so that large traces will work
*/
fc_ex=(itlq_nexus_t *)wmem_tree_lookup32(fc_conv_data->exchanges, fchdr.oxid);
if(!fc_ex){
fc_ex=wmem_new(wmem_file_scope(), itlq_nexus_t);
fc_ex->first_exchange_frame=0;
fc_ex->last_exchange_frame=0;
fc_ex->lun=0xffff;
fc_ex->scsi_opcode=0xffff;
fc_ex->task_flags=0;
fc_ex->data_length=0;
fc_ex->bidir_data_length=0;
fc_ex->fc_time=pinfo->fd->abs_ts;
fc_ex->flags=0;
fc_ex->alloc_len=0;
fc_ex->extra_data=NULL;
wmem_tree_insert32(fc_conv_data->exchanges, fchdr.oxid, fc_ex);
}
/* populate the exchange struct */
if(!pinfo->fd->flags.visited){
if(fchdr.fctl&FC_FCTL_EXCHANGE_FIRST){
fc_ex->first_exchange_frame=pinfo->fd->num;
fc_ex->fc_time = pinfo->fd->abs_ts;
}
if(fchdr.fctl&FC_FCTL_EXCHANGE_LAST){
fc_ex->last_exchange_frame=pinfo->fd->num;
}
}
/* 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);
}
/* put some nice exchange data in the tree */
if(!(fchdr.fctl&FC_FCTL_EXCHANGE_FIRST)){
proto_item *it;
it=proto_tree_add_uint(fc_tree, hf_fc_exchange_first_frame, tvb, 0, 0, fc_ex->first_exchange_frame);
PROTO_ITEM_SET_GENERATED(it);
if(fchdr.fctl&FC_FCTL_EXCHANGE_LAST){
nstime_t delta_ts;
nstime_delta(&delta_ts, &pinfo->fd->abs_ts, &fc_ex->fc_time);
it=proto_tree_add_time(ti, hf_fc_time, tvb, 0, 0, &delta_ts);
PROTO_ITEM_SET_GENERATED(it);
}
}
if(!(fchdr.fctl&FC_FCTL_EXCHANGE_LAST)){
proto_item *it;
it=proto_tree_add_uint(fc_tree, hf_fc_exchange_last_frame, tvb, 0, 0, fc_ex->last_exchange_frame);
PROTO_ITEM_SET_GENERATED(it);
}
fchdr.itlq=fc_ex;
/*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);
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);
col_add_str (pinfo->cinfo, COL_INFO, val_to_str (ftype, fc_ftype_vals,
"Unknown Type (0x%x)"));
if (ftype == FC_FTYPE_LINKCTL)
col_append_fstr (pinfo->cinfo, COL_INFO, ", %s",
val_to_str ((fchdr.r_ctl & 0x0F),
fc_lctl_proto_val,
"LCTL 0x%x"));
if (vft_offset >= 0) {
dissect_fc_vft(fc_tree, tvb, vft_offset);
}
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_value(fc_tree, hf_fc_rctl, tvb, offset,
FC_RCTL_SIZE, fchdr.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_value(fc_tree, hf_fc_rctl, tvb, offset,
FC_RCTL_SIZE, fchdr.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_value(fc_tree, hf_fc_rctl, tvb, offset,
FC_RCTL_SIZE, fchdr.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_value(fc_tree, hf_fc_rctl, tvb, offset,
FC_RCTL_SIZE, fchdr.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_value(fc_tree, hf_fc_rctl, tvb, offset,
FC_RCTL_SIZE, fchdr.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_value(fc_tree, hf_fc_rctl, tvb, offset,
FC_RCTL_SIZE, fchdr.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_value(fc_tree, hf_fc_rctl, tvb, offset,
FC_RCTL_SIZE, fchdr.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;
}
hidden_item = proto_tree_add_uint (fc_tree, hf_fc_ftype, tvb, offset, 1,
ftype);
PROTO_ITEM_SET_HIDDEN(hidden_item);
/* XXX - use "fc_wka_vals[]" on this? */
proto_tree_add_string (fc_tree, hf_fc_did, tvb, offset+1, 3,
fc_to_str ((const guint8 *)fchdr.d_id.data));
hidden_item = proto_tree_add_string (fc_tree, hf_fc_id, tvb, offset+1, 3,
fc_to_str ((const guint8 *)fchdr.d_id.data));
PROTO_ITEM_SET_HIDDEN(hidden_item);
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 ((const guint8 *)fchdr.s_id.data));
hidden_item = proto_tree_add_string (fc_tree, hf_fc_id, tvb, offset+5, 3,
fc_to_str ((const guint8 *)fchdr.s_id.data));
PROTO_ITEM_SET_HIDDEN(hidden_item);
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_value(fc_tree, hf_fc_type, tvb,
offset+8, FC_TYPE_SIZE,
fchdr.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, ENC_BIG_ENDIAN);
}
} else {
proto_tree_add_item (fc_tree, hf_fc_type, tvb, offset+8, 1, ENC_BIG_ENDIAN);
}
dissect_fc_fctl(pinfo, fc_tree, tvb, offset+9);
f_ctl = tvb_get_ntoh24(tvb, offset+9);
proto_tree_add_item (fc_tree, hf_fc_seqid, tvb, offset+12, 1, ENC_BIG_ENDIAN);
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_value(fc_tree, hf_fc_param, tvb,
offset+20, 4, param,
"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, ENC_BIG_ENDIAN);
}
} else if (ftype == FC_FTYPE_BLS) {
if ((fchdr.r_ctl & 0x0F) == FC_BLS_ABTS) {
proto_tree_add_uint_format_value(fc_tree, hf_fc_param, tvb,
offset+20, 4, param,
"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, ENC_BIG_ENDIAN);
}
} else if (ftype == FC_FTYPE_SCSI ) {
if (f_ctl&FC_FCTL_REL_OFFSET){
proto_tree_add_item (fc_tree, hf_fc_relative_offset, tvb, offset+20, 4, ENC_BIG_ENDIAN);
fchdr.relative_offset=tvb_get_ntohl(tvb, offset+20);
} else {
proto_tree_add_item (fc_tree, hf_fc_param, tvb, offset+20, 4, ENC_BIG_ENDIAN);
}
} else {
proto_tree_add_item (fc_tree, hf_fc_param, tvb, offset+20, 4, ENC_BIG_ENDIAN);
}
/* 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_string (wmem_packet_scope(), tvb, offset, 8)));
proto_tree_add_string (fc_tree, hf_fc_nh_sa, tvb, offset+8, 8,
fcwwn_to_str (tvb_get_string (wmem_packet_scope(), 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_exchg_resp = (f_ctl & FC_FCTL_EXCHANGE_RESPONDER) != 0;
}
if (tvb_reported_length (tvb) < FC_HEADER_SIZE)
THROW(ReportedBoundsError);
frag_size = tvb_reported_length (tvb)-FC_HEADER_SIZE;
/* If there is an MDS header, we need to subtract the MDS trailer size
* Link Ctl, BLS & OHMS are all (encap header + FC Header + encap trailer)
* and are never fragmented and so we ignore the frag_size assertion for
* these frames.
*/
if ((pinfo->ethertype == ETHERTYPE_UNK) || (pinfo->ethertype == ETHERTYPE_FCFT)) {
if ((frag_size < MDSHDR_TRAILER_SIZE) ||
((frag_size == MDSHDR_TRAILER_SIZE) && (ftype != FC_FTYPE_LINKCTL) &&
(ftype != FC_FTYPE_BLS) && (ftype != FC_FTYPE_OHMS)))
THROW(ReportedBoundsError);
frag_size -= MDSHDR_TRAILER_SIZE;
} else if (pinfo->ethertype == ETHERTYPE_BRDWALK) {
if ((frag_size <= 8) ||
((frag_size == MDSHDR_TRAILER_SIZE) && (ftype != FC_FTYPE_LINKCTL) &&
(ftype != FC_FTYPE_BLS) && (ftype != FC_FTYPE_OHMS)))
THROW(ReportedBoundsError);
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 */
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) &&
(ftype != FC_FTYPE_OHMS) &&
(!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.
*/
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 = wmem_new(wmem_file_scope(), fcseq_conv_key_t);
req_key->conv_idx = conversation->index;
cdata = wmem_new(wmem_file_scope(), fcseq_conv_data_t);
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;
}
/* Verify that this is a valid fragment */
if (is_lastframe_inseq && !is_1frame_inseq && !real_seqcnt) {
/* This is a frame that purports to be the last frame in a
* sequence, is not the first frame, but has a seqcnt that is
* 0. This is a bogus frame, don't attempt to reassemble it.
*/
next_tvb = tvb_new_subset_remaining (tvb, next_offset);
col_append_str (pinfo->cinfo, COL_INFO, " (Bogus Fragment)");
} else {
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 (&fc_reassembly_table,
tvb, FC_HEADER_SIZE,
pinfo, frag_id, NULL,
real_seqcnt * fc_max_frame_size,
frag_size,
!is_lastframe_inseq);
if (fcfrag_head) {
next_tvb = tvb_new_chain(tvb, fcfrag_head->tvb_data);
/* Add the defragmented data to the data source list. */
add_new_data_source(pinfo, next_tvb, "Reassembled FC");
if (tree) {
hidden_item = proto_tree_add_boolean (fc_tree, hf_fc_reassembled,
tvb, offset+9, 1, 1);
PROTO_ITEM_SET_HIDDEN(hidden_item);
}
}
else {
if (tree) {
hidden_item = proto_tree_add_boolean (fc_tree, hf_fc_reassembled,
tvb, offset+9, 1, 0);
PROTO_ITEM_SET_HIDDEN(hidden_item);
}
next_tvb = tvb_new_subset_remaining (tvb, next_offset);
call_dissector (data_handle, next_tvb, pinfo, tree);
return;
}
}
} else {
if (tree) {
hidden_item = proto_tree_add_boolean (fc_tree, hf_fc_reassembled,
tvb, offset+9, 1, 0);
PROTO_ITEM_SET_HIDDEN(hidden_item);
}
next_tvb = tvb_new_subset_remaining (tvb, next_offset);
}
if ((ftype != FC_FTYPE_LINKCTL) && (ftype != FC_FTYPE_BLS)) {
/* If relative offset is used, only dissect the pdu with
* offset 0 (param) */
if( (fchdr.fctl&FC_FCTL_REL_OFFSET) && param ){
call_dissector (data_handle, next_tvb, pinfo, tree);
} else {
void *saved_private_data;
saved_private_data = pinfo->private_data;
pinfo->private_data = &fchdr;
if (!dissector_try_uint (fcftype_dissector_table, ftype,
next_tvb, pinfo, tree)) {
call_dissector (data_handle, next_tvb, pinfo, tree);
}
pinfo->private_data = saved_private_data;
}
} 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);
} else if ((fchdr.r_ctl & 0x0F) == FC_BLS_ABTS) {
col_set_str(pinfo->cinfo, COL_PROTOCOL, "BLS");
col_set_str(pinfo->cinfo, COL_INFO, "ABTS");
}
}
tap_queue_packet(fc_tap, pinfo, &fchdr);
}
static void
dissect_fc (tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
dissect_fc_helper (tvb, pinfo, tree, FALSE);
}
static void
dissect_fc_ifcp (tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
dissect_fc_helper (tvb, pinfo, tree, TRUE);
}
static void
dissect_fcsof(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) {
proto_item *it = NULL;
proto_tree *fcsof_tree = NULL;
gint bytes_remaining;
tvbuff_t *next_tvb, *checksum_tvb;
guint32 sof = 0;
guint32 crc = 0;
guint32 crc_computed = 0;
guint32 eof = 0;
gint crc_offset = 0;
gint eof_offset = 0;
gint sof_offset = 0;
const gint FCSOF_TRAILER_LEN = 8;
const gint FCSOF_HEADER_LEN = 4;
gint frame_len_for_checksum = 0;
col_set_str(pinfo->cinfo, COL_PROTOCOL, "FC");
crc_offset = tvb_reported_length(tvb) - FCSOF_TRAILER_LEN;
eof_offset = crc_offset + 4;
sof_offset = 0;
/* Get SOF */
sof = tvb_get_ntohl(tvb, 0);
/* GET CRC */
crc = tvb_get_ntohl(tvb, crc_offset);
/* GET Computed CRC */
frame_len_for_checksum = crc_offset - FCSOF_HEADER_LEN;
checksum_tvb = tvb_new_subset(tvb, 4, frame_len_for_checksum, frame_len_for_checksum);
crc_computed = crc32_802_tvb(checksum_tvb, frame_len_for_checksum);
/* Get EOF */
eof = tvb_get_ntohl(tvb, eof_offset);
it = proto_tree_add_protocol_format(tree, proto_fcsof, tvb, 0,
4, "Fibre Channel Delimiter: SOF: %s EOF: %s",
val_to_str(sof, fc_sof_vals, "0x%x"),
val_to_str(eof, fc_eof_vals, "0x%x"));
fcsof_tree = proto_item_add_subtree(it, ett_fcsof);
proto_tree_add_uint(fcsof_tree, hf_fcsof, tvb, sof_offset, 4, sof);
if (crc == crc_computed) {
proto_tree_add_uint_format_value(fcsof_tree, hf_fccrc, tvb,
crc_offset, 4, crc,
"%8.8x [valid]", crc);
} else {
it = proto_tree_add_uint_format_value(fcsof_tree, hf_fccrc, tvb,
crc_offset, 4, crc,
"%8.8x [error: should be %8.8x]",
crc, crc_computed);
expert_add_info_format(pinfo, it, &ei_fccrc,
"Bad FC CRC %8.8x %8.x",
crc, crc_computed);
}
proto_tree_add_uint(fcsof_tree, hf_fceof, tvb, eof_offset, 4, eof);
bytes_remaining = tvb_length_remaining(tvb, 4);
next_tvb = tvb_new_subset(tvb, 4, bytes_remaining, -1);
pinfo->sof_eof = 0;
if (sof == FC_SOFI2 || sof == FC_SOFI3) {
pinfo->sof_eof = PINFO_SOF_FIRST_FRAME;
} else if (sof == FC_SOFF) {
pinfo->sof_eof = PINFO_SOF_SOFF;
}
if (eof == EOFT_POS || eof == EOFT_NEG) {
pinfo->sof_eof |= PINFO_EOF_LAST_FRAME;
} else if (eof == EOFDTI_NEG || eof == EOFDTI_POS) {
pinfo->sof_eof |= PINFO_EOF_INVALID;
}
/* Call FC dissector */
call_dissector(fc_handle, next_tvb, pinfo, tree);
}
/* Register the protocol with Wireshark */
/* 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,
NULL, 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_NONE, NULL, 0x0,
"Destination Address", HFILL}},
{ &hf_fc_csctl,
{"CS_CTL", "fc.cs_ctl", FT_UINT8, BASE_HEX, NULL, 0x0,
NULL, HFILL}},
{ &hf_fc_sid,
{"Src Addr", "fc.s_id", FT_STRING, BASE_NONE, NULL, 0x0,
"Source Address", HFILL}},
{ &hf_fc_id,
{"Addr", "fc.id", FT_STRING, BASE_NONE, NULL, 0x0,
"Source or Destination Address", HFILL}},
{ &hf_fc_type,
{"Type", "fc.type", FT_UINT8, BASE_HEX, VALS (fc_fc4_val), 0x0,
NULL, HFILL}},
{ &hf_fc_fctl,
{"F_CTL", "fc.f_ctl", FT_UINT24, BASE_HEX, NULL, 0x0, NULL, 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, NULL, 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, NULL,
HFILL}},
{ &hf_fc_reassembled,
{"Reassembled Frame", "fc.reassembled", FT_BOOLEAN, BASE_NONE, NULL,
0x0, NULL, HFILL}},
{ &hf_fc_nh_da,
{"Network DA", "fc.nethdr.da", FT_STRING, BASE_NONE, NULL,
0x0, NULL, HFILL}},
{ &hf_fc_nh_sa,
{"Network SA", "fc.nethdr.sa", FT_STRING, BASE_NONE, NULL,
0x0, NULL, 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, NULL, HFILL}},
{ &hf_fc_bls_lastvld_seqid,
{"Last Valid SEQID", "fc.bls_lastseqid", FT_UINT8, BASE_HEX, NULL,
0x0, NULL, HFILL}},
{ &hf_fc_bls_oxid,
{"OXID", "fc.bls_oxid", FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL}},
{ &hf_fc_bls_rxid,
{"RXID", "fc.bls_rxid", FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL}},
{ &hf_fc_bls_lowseqcnt,
{"Low SEQCNT", "fc.bls_lseqcnt", FT_UINT16, BASE_HEX, NULL, 0x0, NULL,
HFILL}},
{ &hf_fc_bls_hiseqcnt,
{"High SEQCNT", "fc.bls_hseqcnt", FT_UINT16, BASE_HEX, NULL, 0x0, NULL,
HFILL}},
{ &hf_fc_bls_rjtcode,
{"Reason", "fc.bls_reason", FT_UINT8, BASE_HEX, VALS(fc_bls_barjt_val),
0x0, NULL, HFILL}},
{ &hf_fc_bls_rjtdetail,
{"Reason Explanation", "fc.bls_rjtdetail", FT_UINT8, BASE_HEX,
VALS (fc_bls_barjt_det_val), 0x0, NULL, HFILL}},
{ &hf_fc_bls_vendor,
{"Vendor Unique Reason", "fc.bls_vnduniq", FT_UINT8, BASE_HEX, NULL,
0x0, NULL, 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}},
#if 0
{ &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}},
#endif
{ &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_relative_offset,
{"Relative Offset", "fc.relative_offset", FT_UINT32, BASE_DEC, NULL,
0, "Relative offset of data", HFILL}},
{ &hf_fc_vft,
{"VFT Header", "fc.vft", FT_UINT16, BASE_DEC, NULL,
0, NULL, HFILL}},
{ &hf_fc_vft_rctl,
{"R_CTL", "fc.vft.rctl", FT_UINT8, BASE_HEX, NULL,
0, NULL, HFILL}},
{ &hf_fc_vft_ver,
{"Version", "fc.vft.ver", FT_UINT8, BASE_DEC, NULL,
0, "Version of VFT header", HFILL}},
{ &hf_fc_vft_type,
{"Type", "fc.vft.type", FT_UINT8, BASE_DEC, NULL,
0, "Type of tagged frame", HFILL}},
{ &hf_fc_vft_pri,
{"Priority", "fc.vft.type", FT_UINT8, BASE_DEC, NULL,
0, "QoS Priority", HFILL}},
{ &hf_fc_vft_vf_id,
{"VF_ID", "fc.vft.vf_id", FT_UINT16, BASE_DEC, NULL,
0, "Virtual Fabric ID", HFILL}},
{ &hf_fc_vft_hop_ct,
{"HopCT", "fc.vft.hop_ct", FT_UINT8, BASE_DEC, NULL,
0, "Hop Count", HFILL}},
};
/* Setup protocol subtree array */
static gint *ett[] = {
&ett_fc,
&ett_fcbls,
&ett_fc_vft,
&ett_fctl
};
static ei_register_info ei[] = {
{ &ei_fccrc, { "fc.crc.bad", PI_CHECKSUM, PI_ERROR, "Bad checksum", EXPFILL }},
};
module_t *fc_module;
expert_module_t* expert_fc;
/* FC SOF */
static hf_register_info sof_hf[] = {
{ &hf_fcsof,
{ "SOF", "fc.sof", FT_UINT32, BASE_HEX, VALS(fc_sof_vals), 0,
NULL, HFILL }},
{ &hf_fceof,
{ "EOF", "fc.eof", FT_UINT32, BASE_HEX, VALS(fc_eof_vals), 0,
NULL, HFILL }},
{ &hf_fccrc,
{ "CRC", "fc.crc", FT_UINT32, BASE_HEX, NULL, 0, NULL, HFILL }},
};
static gint *sof_ett[] = {
&ett_fcsof,
&ett_fceof,
&ett_fccrc
};
/* Register the protocol name and description */
proto_fc = proto_register_protocol ("Fibre Channel", "FC", "fc");
fc_handle = register_dissector ("fc", dissect_fc, proto_fc);
register_dissector ("fc_ifcp", dissect_fc_ifcp, 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));
expert_fc = expert_register_protocol(proto_fc);
expert_register_field_array(expert_fc, ei, array_length(ei));
/* subdissectors called through this table will find the fchdr structure
* through pinfo->private_data
*/
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_exchange_init_protocol);
/* Register FC SOF/EOF */
proto_fcsof = proto_register_protocol("Fibre Channel Delimiters", "FCSoF", "fcsof");
proto_register_field_array(proto_fcsof, sof_hf, array_length(sof_hf));
proto_register_subtree_array(sof_ett, array_length(sof_ett));
fcsof_handle = register_dissector("fcsof", dissect_fcsof, proto_fcsof);
}
/* 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_add_uint("wtap_encap", WTAP_ENCAP_FIBRE_CHANNEL_FC2, fc_handle);
dissector_add_uint("wtap_encap", WTAP_ENCAP_FIBRE_CHANNEL_FC2_WITH_FRAME_DELIMS, fcsof_handle);
data_handle = find_dissector("data");
}
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