forked from osmocom/wireshark
209 lines
6 KiB
C
209 lines
6 KiB
C
/* packet-hyperscsi.c
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* Routines for dissassembly of the Hyper SCSI protocol.
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*
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* $Id$
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1998 Gerald Combs
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* Copyright 2002 Richard Sharpe <rsharpe@richardsharpe.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "config.h"
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#include <glib.h>
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#include <epan/packet.h>
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static int proto_hyperscsi;
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static int hf_hs_cmd = -1;
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static int hf_hs_ver = -1;
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static int hf_hs_res = -1;
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static int hf_hs_tagno = -1;
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static int hf_hs_lastfrag = -1;
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static int hf_hs_fragno = -1;
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static gint ett_hyperscsi = -1;
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static gint ett_hs_hdr = -1;
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static gint ett_hs_pdu = -1;
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static const true_false_string tfs_lastfrag = {
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"Last Fragment",
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"Not Last Fragment"
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};
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#define HSCSI_OPCODE_REQUEST 0x00
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#define HSCSI_OPCODE_REPLY 0x01
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#define HSCSI_OPCODE_DEV_DISCOVERY 0x10
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#define HSCSI_OPCODE_ADN_REQUEST 0x11
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#define HSCSI_OPCODE_ADN_REPLY 0x12
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#define HSCSI_OPCODE_DISCONNECT 0x13
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#define HSCSI_OPCODE_ACK_SNR 0x20
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#define HSCSI_OPCODE_ACK_REPLY 0x21
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#define HSCSI_OPCODE_ADDR_REPORT 0x30
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#define HSCSI_OPCODE_ADDR_REPLY 0x31
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#define HSCSI_OPCODE_LOCAL_REQUEST 0x32
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#define HSCSI_OPCODE_LOCAL_REPLY 0x33
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#define HSCSI_OPCODE_REMOTE_REQUEST 0x34
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#define HSCSI_OPCODE_REMOTE_REPLY 0x35
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static const value_string hscsi_opcodes[] = {
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{ HSCSI_OPCODE_REQUEST, "Command Block Encap Request"},
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{ HSCSI_OPCODE_REPLY, "Command Block Encap Reply"},
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{ HSCSI_OPCODE_DEV_DISCOVERY, "Device Discovery Reply"},
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{ HSCSI_OPCODE_ADN_REQUEST, "Auth/Device Neg Request"},
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{ HSCSI_OPCODE_ADN_REPLY, "Auth/Device Neg Reply"},
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{ HSCSI_OPCODE_DISCONNECT, "Disconnect Request"},
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{ HSCSI_OPCODE_ACK_SNR, "Flow Control Setup/Ack Request"},
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{ HSCSI_OPCODE_ACK_REPLY, "Flow Control Ack Reply"},
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{ 0, NULL}
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};
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#define OPCODE_MASK 0x7F
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static void
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dissect_hyperscsi(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
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{
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guint hs_hdr1, hs_hdr2, hs_hdr3;
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guint8 hs_res;
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guint16 hs_tagno;
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guint16 hs_fragno;
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gint offset = 0;
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proto_tree *hs_hdr_tree, *hs_pdu_tree;
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proto_tree *hs_tree = NULL;
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proto_item *ti;
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guint8 hs_cmd, hs_ver;
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "HyperSCSI");
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col_clear(pinfo->cinfo, COL_INFO);
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if (tree) {
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ti = proto_tree_add_item(tree, proto_hyperscsi, tvb, offset, -1, ENC_NA);
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hs_tree = proto_item_add_subtree(ti, ett_hyperscsi);
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}
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hs_hdr1 = tvb_get_guint8(tvb, offset);
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offset++;
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hs_hdr2 = tvb_get_guint8(tvb, offset);
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offset++;
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hs_hdr3 = tvb_get_guint8(tvb, offset);
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offset++;
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hs_res = hs_hdr1 >> 4;
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hs_tagno = ((hs_hdr1 & 0x0F) << 5 ) | (hs_hdr2 >> 3);
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hs_fragno = ((hs_hdr2 &0X03) << 8 ) | hs_hdr3;
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/*
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* Add the header ... three bytes
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*/
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if (tree) {
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ti = proto_tree_add_text(hs_tree, tvb, 0, 3, "HyperSCSI Header");
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hs_hdr_tree = proto_item_add_subtree(ti, ett_hs_hdr);
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/*
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* Now, add the header items
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*/
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proto_tree_add_uint(hs_hdr_tree, hf_hs_res, tvb, 0, 1, hs_res);
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proto_tree_add_uint(hs_hdr_tree, hf_hs_tagno, tvb, 0, 2, hs_tagno);
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proto_tree_add_item(hs_hdr_tree, hf_hs_lastfrag, tvb, 1, 1, ENC_BIG_ENDIAN);
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proto_tree_add_uint(hs_hdr_tree, hf_hs_fragno, tvb, 1, 2, hs_fragno);
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}
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/*
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* Now, add the PDU
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*/
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hs_ver = tvb_get_guint8(tvb, offset++);
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hs_cmd = tvb_get_guint8(tvb, offset);
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hs_cmd &= OPCODE_MASK;
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if (check_col(pinfo->cinfo, COL_INFO)) {
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col_append_str(pinfo->cinfo, COL_INFO,
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val_to_str(hs_cmd, hscsi_opcodes, "Unknown HyperSCSI Request or Response (%u)"));
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}
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if (tree) {
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ti = proto_tree_add_text(hs_tree, tvb, 3, -1, "HyperSCSI PDU");
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hs_pdu_tree = proto_item_add_subtree(ti, ett_hs_pdu);
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proto_tree_add_uint(hs_pdu_tree, hf_hs_ver, tvb, 3, 1, hs_ver);
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proto_tree_add_uint(hs_pdu_tree, hf_hs_cmd, tvb, 4, 1, hs_cmd);
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}
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}
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void
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proto_register_hyperscsi(void)
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{
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static hf_register_info hf[] = {
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{ &hf_hs_res,
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{ "Reserved", "hyperscsi.reserved", FT_UINT8, BASE_DEC, NULL, 0x0,
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NULL, HFILL}},
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{ &hf_hs_tagno,
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{ "Tag No", "hyperscsi.tagno", FT_UINT16, BASE_DEC, NULL, 0x0,
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NULL, HFILL }},
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{ &hf_hs_lastfrag,
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{ "Last Fragment", "hyperscsi.lastfrag", FT_BOOLEAN, 8, TFS(&tfs_lastfrag), 0x04, NULL, HFILL}},
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{ &hf_hs_fragno,
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{ "Fragment No", "hyperscsi.fragno", FT_UINT16, BASE_DEC, NULL, 0x0,
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NULL, HFILL}},
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{ &hf_hs_ver,
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{ "HyperSCSI Version", "hyperscsi.version", FT_UINT8, BASE_DEC, NULL,
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0x0, NULL, HFILL}},
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{ &hf_hs_cmd,
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{ "HyperSCSI Command", "hyperscsi.cmd", FT_UINT8, BASE_DEC, VALS(hscsi_opcodes), 0x0,
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NULL, HFILL}},
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};
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static gint *ett[] = {
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&ett_hyperscsi,
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&ett_hs_hdr,
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&ett_hs_pdu,
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};
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proto_hyperscsi = proto_register_protocol("HyperSCSI", "HyperSCSI", "hyperscsi");
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proto_register_field_array(proto_hyperscsi, hf, array_length(hf));
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proto_register_subtree_array(ett, array_length(ett));
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register_dissector("hyperscsi", dissect_hyperscsi, proto_hyperscsi);
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}
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#define ETHERTYPE_HYPERSCSI 0x889A
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void
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proto_reg_handoff_hyperscsi(void)
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{
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dissector_handle_t hs_handle;
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hs_handle = find_dissector("hyperscsi");
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dissector_add_uint("ethertype", ETHERTYPE_HYPERSCSI, hs_handle);
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}
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