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/* packet-hyperscsi.c
* Routines for dissassembly of the Hyper SCSI protocol.
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
* Copyright 2002 Richard Sharpe <rsharpe@richardsharpe.com>
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "config.h"
#include <epan/packet.h>
void proto_register_hyperscsi(void);
void proto_reg_handoff_hyperscsi(void);
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 dissector_handle_t hs_handle;
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 int
dissect_hyperscsi(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
{
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;
proto_item *ti;
guint8 hs_cmd, hs_ver;
col_set_str(pinfo->cinfo, COL_PROTOCOL, "HyperSCSI");
col_clear(pinfo->cinfo, COL_INFO);
ti = proto_tree_add_item(tree, proto_hyperscsi, tvb, offset, -1, ENC_NA);
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) {
hs_hdr_tree = proto_tree_add_subtree(hs_tree, tvb, 0, 3, ett_hs_hdr, NULL, "HyperSCSI Header");
/*
* 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, ENC_BIG_ENDIAN);
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;
col_append_str(pinfo->cinfo, COL_INFO,
val_to_str(hs_cmd, hscsi_opcodes, "Unknown HyperSCSI Request or Response (%u)"));
if (tree) {
hs_pdu_tree = proto_tree_add_subtree(hs_tree, tvb, 3, -1, ett_hs_pdu, NULL, "HyperSCSI PDU");
proto_tree_add_uint(hs_pdu_tree, hf_hs_ver, tvb, 3, 1, hs_ver);
proto_tree_add_uint(hs_pdu_tree, hf_hs_cmd, tvb, 4, 1, hs_cmd);
}
return tvb_captured_length(tvb);
}
void
proto_register_hyperscsi(void)
{
static hf_register_info hf[] = {
{ &hf_hs_res,
{ "Reserved", "hyperscsi.reserved", FT_UINT8, BASE_DEC, NULL, 0x0,
NULL, HFILL}},
{ &hf_hs_tagno,
{ "Tag No", "hyperscsi.tagno", FT_UINT16, BASE_DEC, NULL, 0x0,
NULL, HFILL }},
{ &hf_hs_lastfrag,
{ "Last Fragment", "hyperscsi.lastfrag", FT_BOOLEAN, 8, TFS(&tfs_lastfrag), 0x04, NULL, HFILL}},
{ &hf_hs_fragno,
{ "Fragment No", "hyperscsi.fragno", FT_UINT16, BASE_DEC, NULL, 0x0,
NULL, HFILL}},
{ &hf_hs_ver,
{ "HyperSCSI Version", "hyperscsi.version", FT_UINT8, BASE_DEC, NULL,
0x0, NULL, HFILL}},
{ &hf_hs_cmd,
{ "HyperSCSI Command", "hyperscsi.cmd", FT_UINT8, BASE_DEC, VALS(hscsi_opcodes), 0x0,
NULL, 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));
hs_handle = register_dissector("hyperscsi", dissect_hyperscsi, proto_hyperscsi);
}
/* XXX <epan/etypes.h> */
#define ETHERTYPE_HYPERSCSI 0x889A
void
proto_reg_handoff_hyperscsi(void)
{
dissector_add_uint("ethertype", ETHERTYPE_HYPERSCSI, hs_handle);
}
/*
* Editor modelines - https://www.wireshark.org/tools/modelines.html
*
* Local Variables:
* c-basic-offset: 2
* tab-width: 8
* indent-tabs-mode: nil
* End:
*
* ex: set shiftwidth=2 tabstop=8 expandtab:
* :indentSize=2:tabSize=8:noTabs=true:
*/
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