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wireshark/epan/dissectors/packet-fcct.c
Michael Mann 1e60d63c8c Create call_data_dissector() to call data dissector. 
This saves many dissectors the need to find the data dissector and store a handle to it.

There were also some that were finding it, but not using it.
For others this was the only reason for their handoff function, so it could be eliminated.

Change-Id: I5d3f951ee1daa3d30c060d21bd12bbc881a8027b
Reviewed-on: https://code.wireshark.org/review/14530
Petri-Dish: Michael Mann <mmann78@netscape.net>
Reviewed-by: Michael Mann <mmann78@netscape.net>
2016-03-20 17:38:03 +00:00

302 lines
10 KiB
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
*
* 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 <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(wmem_packet_scope(), &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, DISSECTOR_TABLE_NOT_ALLOW_DUPLICATE);
}
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 - http://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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