ee5ca25d31
"epan/..." pathnames, so as to avoid collisions with header files in any of the directories in which we look (e.g., "proto.h", as some other package has its own "proto.h" file which it installs in the top-level include directory). Don't add "-I" flags to search "epan", as that's no longer necessary (and we want includes of "epan" headers to fail if the "epan/" is left out, so that we don't re-introduce includes lacking "epan/"). svn path=/trunk/; revision=4586
325 lines
9.9 KiB
C
325 lines
9.9 KiB
C
/* packet-h1.c
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* Routines for Sinec H1 packet disassembly
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* Gerrit Gehnen <G.Gehnen@atrie.de>
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*
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* $Id: packet-h1.c,v 1.23 2002/01/21 07:36:34 guy Exp $
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*
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* Ethereal - Network traffic analyzer
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* By Gerald Combs <gerald@ethereal.com>
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* Copyright 1998 Gerald Combs
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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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#ifdef HAVE_SYS_TYPES_H
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# include <sys/types.h>
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#endif
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#include <string.h>
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#include <glib.h>
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#include <epan/packet.h>
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static int proto_h1 = -1;
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static int hf_h1_header = -1;
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static int hf_h1_len = -1;
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static int hf_h1_opfield = -1;
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static int hf_h1_oplen = -1;
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static int hf_h1_opcode = -1;
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static int hf_h1_requestblock = -1;
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static int hf_h1_requestlen = -1;
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static int hf_h1_dbnr = -1;
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static int hf_h1_dwnr = -1;
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static int hf_h1_dlen = -1;
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static int hf_h1_org = -1;
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static int hf_h1_response = -1;
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static int hf_h1_response_len = -1;
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static int hf_h1_response_value = -1;
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static int hf_h1_empty_len = -1;
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static int hf_h1_empty = -1;
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static dissector_handle_t data_handle;
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#define EMPTY_BLOCK 0xFF
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#define OPCODE_BLOCK 0x01
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#define REQUEST_BLOCK 0x03
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#define RESPONSE_BLOCK 0x0F
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static const value_string opcode_vals[] = {
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{3, "Write Request"},
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{4, "Write Response"},
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{5, "Read Request"},
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{6, "Read Response"},
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{0, NULL}
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};
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static const value_string org_vals[] = {
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{0x01, "DB"},
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{0x02, "MB"},
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{0x03, "EB"},
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{0x04, "AB"},
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{0x05, "PB"},
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{0x06, "ZB"},
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{0x07, "TB"},
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{0x08, "BS"},
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{0x09, "AS"},
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{0x0a, "DX"},
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{0x10, "DE"},
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{0x11, "QB"},
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{0, NULL}
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};
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static const value_string returncode_vals[] = {
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{0x00, "No error"},
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{0x02, "Requested block does not exist"},
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{0x03, "Requested block too small"},
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{0xFF, "Error, reason unknown"},
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{0, NULL}
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};
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static gint ett_h1 = -1;
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static gint ett_opcode = -1;
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static gint ett_org = -1;
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static gint ett_response = -1;
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static gint ett_empty = -1;
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static gboolean dissect_h1(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
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{
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tvbuff_t *next_tvb;
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proto_tree *h1_tree = NULL;
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proto_item *ti;
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proto_tree *opcode_tree = NULL;
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proto_tree *org_tree = NULL;
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proto_tree *response_tree = NULL;
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proto_tree *empty_tree = NULL;
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unsigned int position = 3;
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unsigned int offset=0;
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if (tvb_length_remaining(tvb, 0) < 2)
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{
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/* Not enough data captured to hold the "S5" header; don't try
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to interpret it as H1. */
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return FALSE;
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}
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if (!(tvb_get_guint8(tvb,offset) == 'S' && tvb_get_guint8(tvb,offset+1) == '5'))
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{
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return FALSE;
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}
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if (check_col (pinfo->cinfo, COL_PROTOCOL))
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col_set_str (pinfo->cinfo, COL_PROTOCOL, "H1");
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if (check_col (pinfo->cinfo, COL_INFO))
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col_add_str (pinfo->cinfo, COL_INFO, "S5: ");
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if (tree)
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{
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ti = proto_tree_add_item (tree, proto_h1, tvb, offset, 16, FALSE);
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h1_tree = proto_item_add_subtree (ti, ett_h1);
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proto_tree_add_uint (h1_tree, hf_h1_header, tvb, offset, 2,
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tvb_get_ntohs(tvb,offset));
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proto_tree_add_uint (h1_tree, hf_h1_len, tvb, offset + 2, 1,
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tvb_get_guint8(tvb,offset+2));
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}
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while (position < tvb_get_guint8(tvb,offset+2))
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{
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switch (tvb_get_guint8(tvb,offset + position))
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{
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case OPCODE_BLOCK:
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if (h1_tree)
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{
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ti = proto_tree_add_uint (h1_tree, hf_h1_opfield, tvb,
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offset + position,
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tvb_get_guint8(tvb,offset+position+1),
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tvb_get_guint8(tvb,offset+position));
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opcode_tree = proto_item_add_subtree (ti, ett_opcode);
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proto_tree_add_uint (opcode_tree, hf_h1_oplen, tvb,
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offset + position + 1, 1,
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tvb_get_guint8(tvb,offset + position + 1));
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proto_tree_add_uint (opcode_tree, hf_h1_opcode, tvb,
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offset + position + 2, 1,
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tvb_get_guint8(tvb,offset + position + 2));
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}
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if (check_col (pinfo->cinfo, COL_INFO))
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{
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col_append_str (pinfo->cinfo, COL_INFO,
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val_to_str (tvb_get_guint8(tvb,offset + position + 2),
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opcode_vals,"Unknown Opcode (0x%2.2x)"));
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}
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break;
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case REQUEST_BLOCK:
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if (h1_tree)
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{
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ti = proto_tree_add_uint (h1_tree, hf_h1_requestblock, tvb,
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offset + position,
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tvb_get_guint8(tvb,offset + position + 1),
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tvb_get_guint8(tvb,offset + position));
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org_tree = proto_item_add_subtree (ti, ett_org);
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proto_tree_add_uint (org_tree, hf_h1_requestlen, tvb,
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offset + position + 1, 1,
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tvb_get_guint8(tvb,offset + position+1));
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proto_tree_add_uint (org_tree, hf_h1_org, tvb,
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offset + position + 2, 1,
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tvb_get_guint8(tvb,offset + position+2));
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proto_tree_add_uint (org_tree, hf_h1_dbnr, tvb,
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offset + position + 3, 1,
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tvb_get_guint8(tvb,offset + position+3));
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proto_tree_add_uint (org_tree, hf_h1_dwnr, tvb,
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offset + position + 4, 2,
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tvb_get_ntohs(tvb,offset+position+4));
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proto_tree_add_int (org_tree, hf_h1_dlen, tvb,
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offset + position + 6, 2,
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tvb_get_ntohs(tvb,offset+position+6));
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}
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if (check_col (pinfo->cinfo, COL_INFO))
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{
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col_append_fstr (pinfo->cinfo, COL_INFO, " %s %d",
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val_to_str (tvb_get_guint8(tvb,offset + position + 2),
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org_vals,"Unknown Type (0x%2.2x)"),
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tvb_get_guint8(tvb,offset + position + 3));
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col_append_fstr (pinfo->cinfo, COL_INFO, " DW %d",
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tvb_get_ntohs(tvb,offset+position+4));
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col_append_fstr (pinfo->cinfo, COL_INFO, " Count %d",
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tvb_get_ntohs(tvb,offset+position+6));
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}
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break;
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case RESPONSE_BLOCK:
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if (h1_tree)
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{
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ti = proto_tree_add_uint (h1_tree, hf_h1_response, tvb,
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offset + position,
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tvb_get_guint8(tvb,offset + position + 1),
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tvb_get_guint8(tvb,offset + position));
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response_tree = proto_item_add_subtree (ti, ett_response);
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proto_tree_add_uint (response_tree, hf_h1_response_len, tvb,
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offset + position + 1, 1,
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tvb_get_guint8(tvb,offset + position+1));
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proto_tree_add_uint (response_tree, hf_h1_response_value, tvb,
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offset + position + 2, 1,
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tvb_get_guint8(tvb,offset + position+2));
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}
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if (check_col (pinfo->cinfo, COL_INFO))
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{
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col_append_fstr (pinfo->cinfo, COL_INFO, " %s",
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val_to_str (tvb_get_guint8(tvb,offset + position + 2),
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returncode_vals,"Unknown Returcode (0x%2.2x"));
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}
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break;
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case EMPTY_BLOCK:
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if (h1_tree)
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{
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ti = proto_tree_add_uint (h1_tree, hf_h1_empty, tvb,
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offset + position,
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tvb_get_guint8(tvb,offset + position + 1),
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tvb_get_guint8(tvb,offset + position));
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empty_tree = proto_item_add_subtree (ti, ett_empty);
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proto_tree_add_uint (empty_tree, hf_h1_empty_len, tvb,
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offset + position + 1, 1,
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tvb_get_guint8(tvb,offset + position+1));
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}
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break;
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default:
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/* This is not a valid telegram. So cancel dissection
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and try the next dissector */
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return FALSE;
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break;
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}
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position += tvb_get_guint8(tvb,offset + position + 1); /* Goto next section */
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} /* ..while */
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next_tvb = tvb_new_subset(tvb, offset+tvb_get_guint8(tvb,offset+2), -1, -1);
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call_dissector(data_handle,next_tvb, pinfo, tree);
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return TRUE;
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}
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void
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proto_register_h1 (void)
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{
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static hf_register_info hf[] = {
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{&hf_h1_header,
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{"H1-Header", "h1.header", FT_UINT16, BASE_HEX, NULL, 0x0,
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"", HFILL }},
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{&hf_h1_len,
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{"Length indicator", "h1.len", FT_UINT16, BASE_DEC, NULL, 0x0,
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"", HFILL }},
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{&hf_h1_opfield,
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{"Operation identifier", "h1.opfield", FT_UINT8, BASE_HEX, NULL, 0x0,
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"", HFILL }},
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{&hf_h1_oplen,
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{"Operation length", "h1.oplen", FT_UINT8, BASE_HEX, NULL, 0x0, "", HFILL }},
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{&hf_h1_opcode,
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{"Opcode", "h1.opcode", FT_UINT8, BASE_HEX, VALS (opcode_vals), 0x0,
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"", HFILL }},
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{&hf_h1_requestblock,
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{"Request identifier", "h1.request", FT_UINT8, BASE_HEX, NULL, 0x0,
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"", HFILL }},
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{&hf_h1_requestlen,
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{"Request length", "h1.reqlen", FT_UINT8, BASE_HEX, NULL, 0x0,
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"", HFILL }},
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{&hf_h1_org,
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{"Memory type", "h1.org", FT_UINT8, BASE_HEX, VALS (org_vals), 0x0,
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"", HFILL }},
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{&hf_h1_dbnr,
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{"Memory block number", "h1.dbnr", FT_UINT8, BASE_DEC, NULL, 0x0, "", HFILL }},
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{&hf_h1_dwnr,
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{"Address within memory block", "h1.dwnr", FT_UINT16, BASE_DEC, NULL, 0x0,
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"", HFILL }},
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{&hf_h1_dlen,
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{"Length in words", "h1.dlen", FT_INT16, BASE_DEC, NULL, 0x0, "", HFILL }},
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{&hf_h1_response,
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{"Response identifier", "h1.response", FT_UINT8, BASE_HEX, NULL, 0x0, "", HFILL }},
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{&hf_h1_response_len,
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{"Response length", "h1.reslen", FT_UINT8, BASE_DEC, NULL, 0x0,
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"", HFILL }},
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{&hf_h1_response_value,
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{"Response value", "h1.resvalue", FT_UINT8, BASE_DEC,
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VALS (returncode_vals), 0x0, "", HFILL }},
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{&hf_h1_empty,
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{"Empty field", "h1.empty", FT_UINT8, BASE_HEX, NULL, 0x0,
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"", HFILL }},
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{&hf_h1_empty_len,
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{"Empty field length", "h1.empty_len", FT_UINT8, BASE_DEC, NULL, 0x0,
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"", HFILL }}
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};
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static gint *ett[] = {
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&ett_h1,
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&ett_opcode,
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&ett_response,
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&ett_org,
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&ett_empty
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};
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proto_h1 = proto_register_protocol ("Sinec H1 Protocol", "H1", "h1");
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proto_register_field_array (proto_h1, hf, array_length (hf));
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proto_register_subtree_array (ett, array_length (ett));
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}
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void
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proto_reg_handoff_h1(void)
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{
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heur_dissector_add("cotp_is", dissect_h1, proto_h1);
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data_handle = find_dissector("data");
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}
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