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wireshark/epan/dissectors/packet-fcct.c

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/* packet-fcct.c
* Routines for FC Common Transport Protocol (used by GS3 services)
* Copyright 2001, Dinesh G Dutt <ddutt@andiamo.com>
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "config.h"
#include <epan/packet.h>
#include <epan/to_str.h>
#include "packet-fc.h"
#include "packet-fcct.h"
void proto_register_fcct(void);
void proto_reg_handoff_fcct(void);
/* Initialize the protocol and registered fields */
static int proto_fcct = -1;
static int hf_fcct_revision = -1;
static int hf_fcct_inid = -1;
static int hf_fcct_gstype = -1;
static int hf_fcct_gssubtype = -1;
static int hf_fcct_options = -1;
static int hf_fcct_server = -1; /* derived field */
/* Extended preamble fields */
#if 0
static int hf_fcct_ext_said = -1;
static int hf_fcct_ext_tid = -1;
static int hf_fcct_ext_reqname = -1;
static int hf_fcct_ext_tstamp = -1;
static int hf_fcct_ext_authblk = -1;
#endif
/* Initialize the subtree pointers */
static gint ett_fcct = -1;
static gint ett_fcct_ext = -1; /* for the extended header */
const value_string fc_ct_rjt_code_vals [] = {
{FCCT_RJT_INVCMDCODE, "Invalid Cmd Code"},
{FCCT_RJT_INVVERSION, "Invalid Version Level"},
{FCCT_RJT_LOGICALERR, "Logical Error"},
{FCCT_RJT_INVSIZE, "Invalid CT_IU Size"},
{FCCT_RJT_LOGICALBSY, "Logical Busy"},
{FCCT_RJT_PROTOERR, "Protocol Error"},
{FCCT_RJT_GENFAIL, "Unable to Perform Cmd"},
{FCCT_RJT_CMDNOTSUPP, "Cmd Not Supported"},
{0, NULL},
};
const value_string fc_ct_gstype_vals[] = {
{FCCT_GSTYPE_KEYSVC, "Key Service"},
{FCCT_GSTYPE_ALIASSVC, "Alias Service"},
{FCCT_GSTYPE_MGMTSVC, "Management Service"},
{FCCT_GSTYPE_TIMESVC, "Time Service"},
{FCCT_GSTYPE_DIRSVC, "Directory Service"},
{FCCT_GSTYPE_FCTLR, "Fabric Controller"},
{FCCT_GSTYPE_VENDOR, "Vendor-Specific"},
{0, NULL},
};
const value_string fc_ct_gsserver_vals[] = {
{FCCT_GSRVR_DNS, "dNS"},
{FCCT_GSRVR_IP, "IP"},
{FCCT_GSRVR_FCS, "Fabric Config Server"},
{FCCT_GSRVR_UNS, "Unzoned Name Server"},
{FCCT_GSRVR_FZS, "Fabric Zone Server"},
{FCCT_GSRVR_TS, "Time Server"},
{FCCT_GSRVR_KS, "Key Server"},
{FCCT_GSRVR_AS, "Alias Server"},
{FCCT_GSRVR_FCTLR, "Fabric Controller"},
{0, NULL},
};
static dissector_table_t fcct_gserver_table;
guint8
get_gs_server (guint8 gstype, guint8 gssubtype)
{
switch (gstype) {
case FCCT_GSTYPE_KEYSVC:
return FCCT_GSRVR_KS;
case FCCT_GSTYPE_ALIASSVC:
if (gssubtype == FCCT_GSSUBTYPE_AS)
return FCCT_GSRVR_AS;
return FCCT_GSRVR_UNKNOWN;
case FCCT_GSTYPE_MGMTSVC:
if (gssubtype == FCCT_GSSUBTYPE_FCS)
return FCCT_GSRVR_FCS;
else if (gssubtype == FCCT_GSSUBTYPE_UNS)
return FCCT_GSRVR_UNS;
else if (gssubtype == FCCT_GSSUBTYPE_FZS)
return FCCT_GSRVR_FZS;
else return FCCT_GSRVR_UNKNOWN;
case FCCT_GSTYPE_TIMESVC:
if (gssubtype == FCCT_GSSUBTYPE_TS)
return FCCT_GSRVR_TS;
return FCCT_GSRVR_UNKNOWN;
case FCCT_GSTYPE_DIRSVC:
if (gssubtype == FCCT_GSSUBTYPE_DNS)
return FCCT_GSRVR_DNS;
else if (gssubtype == FCCT_GSSUBTYPE_IP)
return FCCT_GSRVR_IP;
return FCCT_GSRVR_UNKNOWN;
case FCCT_GSRVR_FCTLR:
if (gssubtype == FCCT_GSSUBTYPE_FCTLR)
return (FCCT_GSRVR_FCTLR);
else return (FCCT_GSRVR_UNKNOWN);
default:
return FCCT_GSRVR_UNKNOWN;
}
}
/* Code to actually dissect the packets */
static int
dissect_fcct (tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data)
{
/* Set up structures needed to add the protocol subtree and manage it */
proto_item *ti;
proto_tree *fcct_tree;
tvbuff_t *next_tvb;
int in_id,
offset = 0;
guint8 server;
fc_ct_preamble cthdr;
address addr;
/* Make entries in Protocol column and Info column on summary display */
col_set_str(pinfo->cinfo, COL_PROTOCOL, "FC_CT");
/*
cthdr.revision = tvb_get_guint8 (tvb, offset++);
cthdr.in_id = tvb_get_ntoh24 (tvb, offset);
offset += 3;
cthdr.gstype = tvb_get_guint8 (tvb, offset++);
cthdr.options = tvb_get_guint8 (tvb, offset++);
*/
tvb_memcpy (tvb, (guint8 *)&cthdr, offset, FCCT_PRMBL_SIZE);
cthdr.revision = tvb_get_guint8 (tvb, offset++);
cthdr.in_id = tvb_get_ntoh24 (tvb, offset);
cthdr.opcode = g_ntohs (cthdr.opcode);
cthdr.maxres_size = g_ntohs (cthdr.maxres_size);
if (cthdr.opcode < FCCT_MSG_REQ_MAX) {
col_append_str (pinfo->cinfo, COL_INFO, " Request");
}
else if (cthdr.opcode == FCCT_MSG_ACC) {
col_append_str (pinfo->cinfo, COL_INFO, " Accept");
}
else if (cthdr.opcode == FCCT_MSG_RJT) {
col_append_fstr (pinfo->cinfo, COL_INFO, " Reject (%s)",
val_to_str (cthdr.rjt_code, fc_ct_rjt_code_vals, "0x%x"));
}
else {
col_append_str (pinfo->cinfo, COL_INFO, " Reserved");
}
in_id = cthdr.in_id;
in_id = g_htonl (in_id) >> 8;
/* Determine server */
server = get_gs_server (cthdr.gstype, cthdr.gssubtype);
if (tree) {
offset = 0;
ti = proto_tree_add_protocol_format (tree, proto_fcct, tvb, 0, FCCT_PRMBL_SIZE,
"FC_CT");
fcct_tree = proto_item_add_subtree (ti, ett_fcct);
proto_tree_add_item (fcct_tree, hf_fcct_revision, tvb, offset++,
sizeof (guint8), ENC_BIG_ENDIAN);
set_address(&addr, AT_FC, 3, &in_id);
proto_tree_add_string (fcct_tree, hf_fcct_inid, tvb, offset, 3,
address_to_str(pinfo->pool, &addr));
offset += 3; /* sizeof FC address */
proto_tree_add_item (fcct_tree, hf_fcct_gstype, tvb, offset++,
sizeof (guint8), ENC_BIG_ENDIAN);
proto_tree_add_item (fcct_tree, hf_fcct_gssubtype, tvb, offset,
sizeof (guint8), ENC_BIG_ENDIAN);
proto_tree_add_uint (fcct_tree, hf_fcct_server, tvb, offset++, 1,
server);
proto_tree_add_item (fcct_tree, hf_fcct_options, tvb, offset++,
sizeof (guint8), ENC_BIG_ENDIAN);
}
/* We do not change the starting offset for the next protocol in the
* chain since the fc_ct header is common to the sub-protocols.
* Pass the fchdr* received from parent dissector through to sub-protocols
*/
next_tvb = tvb_new_subset_remaining (tvb, 0);
if (!dissector_try_uint_new(fcct_gserver_table, server, next_tvb, pinfo,
tree, TRUE, data)) {
call_data_dissector(next_tvb, pinfo, tree);
}
return tvb_captured_length(tvb);
}
/* Register the protocol with Wireshark */
void
proto_register_fcct(void)
{
/* Setup list of header fields See Section 1.6.1 for details*/
static hf_register_info hf[] = {
{ &hf_fcct_revision,
{"Revision", "fcct.revision", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL}},
{ &hf_fcct_inid,
{"IN_ID", "fcct.in_id", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL}},
{ &hf_fcct_gstype,
{"GS Type", "fcct.gstype", FT_UINT8, BASE_HEX, VALS(fc_ct_gstype_vals),
0x0, NULL, HFILL}},
{ &hf_fcct_gssubtype,
{"GS Subtype", "fcct.gssubtype", FT_UINT8, BASE_HEX, NULL, 0x0,
NULL, HFILL}},
{ &hf_fcct_server,
{"Server", "fcct.server", FT_UINT8, BASE_HEX,
VALS (fc_ct_gsserver_vals), 0x0,
"Derived from GS Type & Subtype fields", HFILL}},
{ &hf_fcct_options,
{"Options", "fcct.options", FT_UINT8, BASE_HEX, NULL, 0x0, NULL,
HFILL}},
#if 0
{ &hf_fcct_ext_said,
{"Auth SAID", "fcct.ext_said", FT_UINT32, BASE_HEX, NULL, 0x0, NULL,
HFILL}},
{ &hf_fcct_ext_tid,
{"Transaction ID", "fcct.ext_tid", FT_UINT32, BASE_HEX, NULL, 0x0, NULL,
HFILL}},
{ &hf_fcct_ext_reqname,
{"Requestor Port Name", "fcct.ext_reqnm", FT_BYTES, BASE_NONE, NULL,
0x0, NULL, HFILL}},
{ &hf_fcct_ext_tstamp,
{"Timestamp", "fcct.ext_tstamp", FT_BYTES, BASE_NONE, NULL, 0x0, NULL,
HFILL}},
{ &hf_fcct_ext_authblk,
{"Auth Hash Blk", "fcct.ext_authblk", FT_BYTES, BASE_NONE, NULL, 0x0,
NULL, HFILL}},
#endif
};
/* Setup protocol subtree array */
static gint *ett[] = {
&ett_fcct,
&ett_fcct_ext,
};
/* Register the protocol name and description */
proto_fcct = proto_register_protocol("Fibre Channel Common Transport", "FC_CT", "fcct");
/* Required function calls to register the header fields and subtrees used */
proto_register_field_array(proto_fcct, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
fcct_gserver_table = register_dissector_table ("fcct.server",
"FCCT Server",
proto_fcct, FT_UINT8, BASE_HEX);
}
void
proto_reg_handoff_fcct (void)
{
dissector_handle_t fcct_handle;
fcct_handle = create_dissector_handle (dissect_fcct, proto_fcct);
dissector_add_uint("fc.ftype", FC_FTYPE_FCCT, fcct_handle);
}
/*
* Editor modelines - https://www.wireshark.org/tools/modelines.html
*
* Local variables:
* c-basic-offset: 4
* tab-width: 8
* indent-tabs-mode: nil
* End:
*
* vi: set shiftwidth=4 tabstop=8 expandtab:
* :indentSize=4:tabSize=8:noTabs=true:
*/
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