/* 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 * Copyright 1998 Gerald Combs * Copyright 2002 Richard Sharpe * * 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 #include #include #ifdef NEED_SNPRINTF_H # include "snprintf.h" #endif #include 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); }