wireshark/packet-hyperscsi.c

224 lines
6.4 KiB
C

/* packet-ip.c
* Routines for dissassembly of the Hyper SCSI protocol.
*
* $Id: packet-hyperscsi.c,v 1.4 2002/12/03 01:09:00 jmayer Exp $
*
* Ethereal - Network traffic analyzer
* By Gerald Combs <gerald@ethereal.com>
* Copyright 1998 Gerald Combs
* Copyright 2002 Richard Sharpe <rsharpe@richardsharpe.com>
*
* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <stdio.h>
#include <string.h>
#include <glib.h>
#ifdef NEED_SNPRINTF_H
# include "snprintf.h"
#endif
#include <epan/packet.h>
static int proto_hyperscsi;
static int hf_hs_cmd = -1;
static int hf_hs_ver = -1;
static int hf_hs_res = -1;
static int hf_hs_tagno = -1;
static int hf_hs_lastfrag = -1;
static int hf_hs_fragno = -1;
static gint ett_hyperscsi = -1;
static gint ett_hs_hdr = -1;
static gint ett_hs_pdu = -1;
static const true_false_string tfs_lastfrag = {
"Last Fragment",
"Not Last Fragment"
};
#define HSCSI_OPCODE_REQUEST 0x00
#define HSCSI_OPCODE_REPLY 0x01
#define HSCSI_OPCODE_DEV_DISCOVERY 0x10
#define HSCSI_OPCODE_ADN_REQUEST 0x11
#define HSCSI_OPCODE_ADN_REPLY 0x12
#define HSCSI_OPCODE_DISCONNECT 0x13
#define HSCSI_OPCODE_ACK_SNR 0x20
#define HSCSI_OPCODE_ACK_REPLY 0x21
#define HSCSI_OPCODE_ADDR_REPORT 0x30
#define HSCSI_OPCODE_ADDR_REPLY 0x31
#define HSCSI_OPCODE_LOCAL_REQUEST 0x32
#define HSCSI_OPCODE_LOCAL_REPLY 0x33
#define HSCSI_OPCODE_REMOTE_REQUEST 0x34
#define HSCSI_OPCODE_REMOTE_REPLY 0x35
static const value_string hscsi_opcodes[] = {
{ HSCSI_OPCODE_REQUEST, "Command Block Encap Request"},
{ HSCSI_OPCODE_REPLY, "Command Block Encap Reply"},
{ HSCSI_OPCODE_DEV_DISCOVERY, "Device Discovery Reply"},
{ HSCSI_OPCODE_ADN_REQUEST, "Auth/Device Neg Request"},
{ HSCSI_OPCODE_ADN_REPLY, "Auth/Device Neg Reply"},
{ HSCSI_OPCODE_DISCONNECT, "Disconnect Request"},
{ HSCSI_OPCODE_ACK_SNR, "Flow Control Setup/Ack Request"},
{ HSCSI_OPCODE_ACK_REPLY, "Flow Control Ack Reply"},
{ 0, NULL}
};
#define OPCODE_MASK 0x7F
static void
dissect_hyperscsi(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
guint hs_hdr1, hs_hdr2, hs_hdr3;
guint8 hs_res;
guint16 hs_tagno;
guint16 hs_fragno;
gint offset = 0;
proto_tree *hs_hdr_tree, *hs_pdu_tree;
proto_tree *hs_tree = NULL;
proto_item *ti;
guint8 hs_cmd, hs_ver;
char *opcode_str;
if (check_col(pinfo->cinfo, COL_PROTOCOL))
col_set_str(pinfo->cinfo, COL_PROTOCOL, "HYPERSCSI");
if (check_col(pinfo->cinfo, COL_INFO))
col_clear(pinfo->cinfo, COL_INFO);
if (tree) {
ti = proto_tree_add_item(tree, proto_hyperscsi, tvb, offset, -1, FALSE);
hs_tree = proto_item_add_subtree(ti, ett_hyperscsi);
}
hs_hdr1 = tvb_get_guint8(tvb, offset);
offset++;
hs_hdr2 = tvb_get_guint8(tvb, offset);
offset++;
hs_hdr3 = tvb_get_guint8(tvb, offset);
offset++;
hs_res = hs_hdr1 >> 4;
hs_tagno = ((hs_hdr1 & 0x0F) << 5 ) | (hs_hdr2 >> 3);
hs_fragno = ((hs_hdr2 &0X03) << 8 ) | hs_hdr3;
/*
* Add the header ... three bytes
*/
if (tree) {
ti = proto_tree_add_text(hs_tree, tvb, 0, 3, "HyperSCSI Header");
hs_hdr_tree = proto_item_add_subtree(ti, ett_hs_hdr);
/*
* Now, add the header items
*/
proto_tree_add_uint(hs_hdr_tree, hf_hs_res, tvb, 0, 1, hs_res);
proto_tree_add_uint(hs_hdr_tree, hf_hs_tagno, tvb, 0, 2, hs_tagno);
proto_tree_add_item(hs_hdr_tree, hf_hs_lastfrag, tvb, 1, 1, FALSE);
proto_tree_add_uint(hs_hdr_tree, hf_hs_fragno, tvb, 1, 2, hs_fragno);
}
/*
* Now, add the PDU
*/
hs_ver = tvb_get_guint8(tvb, offset++);
hs_cmd = tvb_get_guint8(tvb, offset++);
hs_cmd &= OPCODE_MASK;
opcode_str = match_strval(hs_cmd, hscsi_opcodes);
if (!opcode_str)
opcode_str = "Unknown HyperSCSI Request or Response";
if (check_col(pinfo->cinfo, COL_INFO)) {
col_append_str(pinfo->cinfo, COL_INFO, (char *)opcode_str);
}
if (tree) {
ti = proto_tree_add_text(hs_tree, tvb, 3, -1, "HyperSCSI PDU");
hs_pdu_tree = proto_item_add_subtree(ti, ett_hs_pdu);
proto_tree_add_uint(hs_pdu_tree, hf_hs_ver, tvb, 3, 1, hs_ver);
proto_tree_add_uint_format(hs_pdu_tree, hf_hs_cmd, tvb, 4, 1, hs_cmd, "HyperSCSI Command: %s", opcode_str);
}
}
void
proto_register_hyperscsi(void)
{
static hf_register_info hf[] = {
{ &hf_hs_res,
{ "Reserved", "hyperscsi.reserved", FT_UINT8, BASE_DEC, NULL, 0x0,
"", HFILL}},
{ &hf_hs_tagno,
{ "Tag No", "hyperscsi.tagno", FT_UINT16, BASE_DEC, NULL, 0x0,
"", HFILL }},
{ &hf_hs_lastfrag,
{ "Last Fragment", "hyperscsi.lastfrag", FT_BOOLEAN, 8, TFS(&tfs_lastfrag), 0x04, "", HFILL}},
{ &hf_hs_fragno,
{ "Fragment No", "hyperscsi.fragno", FT_UINT16, BASE_DEC, NULL, 0x0,
"", HFILL}},
{ &hf_hs_ver,
{ "HyperSCSI Version", "hyperscsi.version", FT_UINT8, BASE_DEC, NULL,
0x0, "", HFILL}},
{ &hf_hs_cmd,
{ "HyperSCSI Command", "hyperscsi.cmd", FT_UINT8, BASE_DEC, NULL, 0x0,
"", HFILL}},
};
static gint *ett[] = {
&ett_hyperscsi,
&ett_hs_hdr,
&ett_hs_pdu,
};
proto_hyperscsi = proto_register_protocol("HyperSCSI", "HyperSCSI", "hyperscsi");
proto_register_field_array(proto_hyperscsi, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
register_dissector("hyperscsi", dissect_hyperscsi, proto_hyperscsi);
}
#define ETHERTYPE_HYPERSCSI 0x889A
void
proto_reg_handoff_hyperscsi(void)
{
dissector_handle_t hs_handle;
hs_handle = find_dissector("hyperscsi");
dissector_add("ethertype", ETHERTYPE_HYPERSCSI, hs_handle);
}