006d9821f6
The DOF is part of the open-source OpenDOF Project, more information at https://opendof.org There is a sample capture file (with encryption keys) at https://wiki.wireshark.org/SampleCaptures#DOF_.28Distributed_Object_Framework.29_Protocols Change-Id: I8d8ce3edf39904d0467a403157f9de2d2a165e90 Reviewed-on: https://code.wireshark.org/review/14394 Petri-Dish: Alexis La Goutte <alexis.lagoutte@gmail.com> Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org> Reviewed-by: Anders Broman <a.broman58@gmail.com>
342 lines
12 KiB
C
342 lines
12 KiB
C
/* packet-v120.c
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* Routines for v120 frame disassembly
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* Bert Driehuis <driehuis@playbeing.org>
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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
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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 <epan/packet.h>
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#include <epan/xdlc.h>
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void proto_register_v120(void);
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static int proto_v120 = -1;
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static int hf_v120_address = -1;
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static int hf_v120_rc = -1;
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static int hf_v120_lli = -1;
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static int hf_v120_ea0 = -1;
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static int hf_v120_ea1 = -1;
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static int hf_v120_control = -1;
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static int hf_v120_n_r = -1;
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static int hf_v120_n_s = -1;
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static int hf_v120_p = -1;
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static int hf_v120_p_ext = -1;
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static int hf_v120_f = -1;
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static int hf_v120_f_ext = -1;
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static int hf_v120_s_ftype = -1;
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static int hf_v120_u_modifier_cmd = -1;
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static int hf_v120_u_modifier_resp = -1;
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static int hf_v120_ftype_i = -1;
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static int hf_v120_ftype_s_u = -1;
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static int hf_v120_ftype_s_u_ext = -1;
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static int hf_v120_header8 = -1;
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static int hf_v120_header_ext8 = -1;
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static int hf_v120_header_break8 = -1;
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static int hf_v120_header_error_control8 = -1;
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static int hf_v120_header_segb8 = -1;
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static int hf_v120_header_segf8 = -1;
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static int hf_v120_header16 = -1;
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static int hf_v120_header_ext16 = -1;
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static int hf_v120_header_break16 = -1;
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static int hf_v120_header_error_control16 = -1;
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static int hf_v120_header_segb16 = -1;
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static int hf_v120_header_segf16 = -1;
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static int hf_v120_header_e = -1;
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static int hf_v120_header_dr = -1;
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static int hf_v120_header_sr = -1;
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static int hf_v120_header_rr = -1;
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static gint ett_v120 = -1;
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static gint ett_v120_address = -1;
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static gint ett_v120_control = -1;
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static gint ett_v120_header = -1;
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static int dissect_v120_header(tvbuff_t *tvb, int offset, proto_tree *tree);
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/* Used only for U frames */
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static const xdlc_cf_items v120_cf_items = {
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NULL,
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NULL,
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&hf_v120_p,
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&hf_v120_f,
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NULL,
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&hf_v120_u_modifier_cmd,
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&hf_v120_u_modifier_resp,
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NULL,
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&hf_v120_ftype_s_u
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};
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/* Used only for I and S frames */
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static const xdlc_cf_items v120_cf_items_ext = {
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&hf_v120_n_r,
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&hf_v120_n_s,
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&hf_v120_p_ext,
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&hf_v120_f_ext,
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&hf_v120_s_ftype,
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NULL,
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NULL,
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&hf_v120_ftype_i,
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&hf_v120_ftype_s_u_ext
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};
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static int
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dissect_v120(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
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{
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proto_tree *v120_tree, *address_tree;
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proto_item *ti, *tc;
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int is_response;
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int v120len;
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guint8 byte0, byte1;
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guint16 control;
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tvbuff_t *next_tvb;
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "V.120");
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col_clear(pinfo->cinfo, COL_INFO);
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byte0 = tvb_get_guint8(tvb, 0);
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col_add_fstr(pinfo->cinfo, COL_RES_DL_SRC, "0x%02X", byte0);
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byte1 = tvb_get_guint8(tvb, 1);
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if ( ((byte0 & 0x01) != 0x00) && ((byte1 & 0x01) != 0x01) )
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{
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col_set_str(pinfo->cinfo, COL_INFO, "Invalid V.120 frame");
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if (tree)
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proto_tree_add_protocol_format(tree, proto_v120, tvb, 0, -1,
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"Invalid V.120 frame");
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return 2;
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}
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if (pinfo->p2p_dir == P2P_DIR_SENT) {
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is_response = (byte0 & 0x02) ? FALSE: TRUE;
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col_set_str(pinfo->cinfo, COL_RES_DL_DST, "DCE");
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col_set_str(pinfo->cinfo, COL_RES_DL_SRC, "DTE");
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} else {
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/* XXX - what if the direction is unknown? */
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is_response = (byte0 & 0x02) ? TRUE : FALSE;
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col_set_str(pinfo->cinfo, COL_RES_DL_DST, "DTE");
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col_set_str(pinfo->cinfo, COL_RES_DL_SRC, "DCE");
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}
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ti = proto_tree_add_protocol_format(tree, proto_v120, tvb, 0, -1, "V.120");
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v120_tree = proto_item_add_subtree(ti, ett_v120);
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tc = proto_tree_add_item(v120_tree, hf_v120_address, tvb, 0, 2, ENC_BIG_ENDIAN);
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proto_item_append_text(tc, "LLI: %d C/R: %s",
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((byte0 & 0xfc) << 5) | ((byte1 & 0xfe) >> 1),
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byte0 & 0x02 ? "R" : "C");
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address_tree = proto_item_add_subtree(tc, ett_v120_address);
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proto_tree_add_item(address_tree, hf_v120_rc, tvb, 0, 2, ENC_BIG_ENDIAN);
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proto_tree_add_item(address_tree, hf_v120_lli, tvb, 0, 2, ENC_BIG_ENDIAN);
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proto_tree_add_item(address_tree, hf_v120_ea0, tvb, 0, 2, ENC_BIG_ENDIAN);
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proto_tree_add_item(address_tree, hf_v120_ea1, tvb, 0, 2, ENC_BIG_ENDIAN);
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control = dissect_xdlc_control(tvb, 2, pinfo, v120_tree, hf_v120_control,
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ett_v120_control, &v120_cf_items, &v120_cf_items_ext,
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NULL, NULL, is_response, TRUE, FALSE);
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v120len = 2 + XDLC_CONTROL_LEN(control, TRUE);
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if (tvb_bytes_exist(tvb, v120len, 1))
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v120len += dissect_v120_header(tvb, v120len, v120_tree);
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proto_item_set_len(ti, v120len);
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next_tvb = tvb_new_subset_remaining(tvb, v120len);
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call_data_dissector(next_tvb, pinfo, v120_tree);
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return tvb_captured_length(tvb);
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}
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static int
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dissect_v120_header(tvbuff_t *tvb, int offset, proto_tree *tree)
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{
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int header_len;
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guint8 byte0;
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proto_tree *h_tree;
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proto_item *tc;
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byte0 = tvb_get_guint8(tvb, offset);
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if (byte0 & 0x80) {
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header_len = 1;
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tc = proto_tree_add_item(tree, hf_v120_header8, tvb, 0, 1, ENC_BIG_ENDIAN);
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h_tree = proto_item_add_subtree(tc, ett_v120_header);
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proto_tree_add_item(h_tree, hf_v120_header_ext8, tvb, 0, 1, ENC_NA);
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proto_tree_add_item(h_tree, hf_v120_header_break8, tvb, 0, 1, ENC_NA);
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proto_tree_add_item(h_tree, hf_v120_header_error_control8, tvb, 0, 1, ENC_BIG_ENDIAN);
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proto_tree_add_item(h_tree, hf_v120_header_segb8, tvb, 0, 1, ENC_NA);
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proto_tree_add_item(h_tree, hf_v120_header_segf8, tvb, 0, 1, ENC_NA);
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} else {
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header_len = 2;
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tc = proto_tree_add_item(tree, hf_v120_header16, tvb, 0, 2, ENC_BIG_ENDIAN);
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h_tree = proto_item_add_subtree(tc, ett_v120_header);
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proto_tree_add_item(h_tree, hf_v120_header_ext16, tvb, 0, 2, ENC_BIG_ENDIAN);
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proto_tree_add_item(h_tree, hf_v120_header_break16, tvb, 0, 2, ENC_BIG_ENDIAN);
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proto_tree_add_item(h_tree, hf_v120_header_error_control16, tvb, 0, 2, ENC_BIG_ENDIAN);
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proto_tree_add_item(h_tree, hf_v120_header_segb16, tvb, 0, 2, ENC_BIG_ENDIAN);
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proto_tree_add_item(h_tree, hf_v120_header_segf16, tvb, 0, 2, ENC_BIG_ENDIAN);
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proto_tree_add_item(h_tree, hf_v120_header_e, tvb, 0, 2, ENC_BIG_ENDIAN);
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proto_tree_add_item(h_tree, hf_v120_header_dr, tvb, 0, 2, ENC_BIG_ENDIAN);
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proto_tree_add_item(h_tree, hf_v120_header_sr, tvb, 0, 2, ENC_BIG_ENDIAN);
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proto_tree_add_item(h_tree, hf_v120_header_rr, tvb, 0, 2, ENC_BIG_ENDIAN);
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}
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proto_item_append_text(tc, " B: %d F: %d",
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byte0 & 0x02 ? 1:0, byte0 & 0x01 ? 1:0);
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return header_len;
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}
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void
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proto_register_v120(void)
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{
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static hf_register_info hf[] = {
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{ &hf_v120_address,
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{ "Link Address", "v120.address", FT_UINT16, BASE_HEX, NULL,
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0x0, NULL, HFILL }},
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{ &hf_v120_rc,
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{ "R/C", "v120.rc", FT_BOOLEAN, 16, TFS(&tfs_response_command),
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0x0002, NULL, HFILL }},
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{ &hf_v120_lli,
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{ "LLI", "v120.lli", FT_UINT16, BASE_HEX, NULL,
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0xfefc, NULL, HFILL }},
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{ &hf_v120_ea0,
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{ "EA0", "v120.ea0", FT_BOOLEAN, 16, TFS(&tfs_error_ok),
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0x0001, NULL, HFILL }},
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{ &hf_v120_ea1,
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{ "EA1", "v120.ea1", FT_BOOLEAN, 16, TFS(&tfs_ok_error),
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0x0100, NULL, HFILL }},
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{ &hf_v120_control,
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{ "Control Field", "v120.control", FT_UINT16, BASE_HEX, NULL, 0x0,
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NULL, HFILL }},
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{ &hf_v120_n_r,
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{ "N(R)", "v120.control.n_r", FT_UINT16, BASE_DEC,
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NULL, XDLC_N_R_EXT_MASK, NULL, HFILL }},
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{ &hf_v120_n_s,
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{ "N(S)", "v120.control.n_s", FT_UINT16, BASE_DEC,
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NULL, XDLC_N_S_EXT_MASK, NULL, HFILL }},
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{ &hf_v120_p,
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{ "Poll", "v120.control.p", FT_BOOLEAN, 8,
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TFS(&tfs_set_notset), XDLC_P_F, NULL, HFILL }},
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{ &hf_v120_p_ext,
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{ "Poll", "v120.control.p", FT_BOOLEAN, 16,
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TFS(&tfs_set_notset), XDLC_P_F_EXT, NULL, HFILL }},
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{ &hf_v120_f,
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{ "Final", "v120.control.f", FT_BOOLEAN, 8,
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TFS(&tfs_set_notset), XDLC_P_F, NULL, HFILL }},
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{ &hf_v120_f_ext,
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{ "Final", "v120.control.f", FT_BOOLEAN, 16,
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TFS(&tfs_set_notset), XDLC_P_F_EXT, NULL, HFILL }},
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{ &hf_v120_s_ftype,
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{ "Supervisory frame type", "v120.control.s_ftype", FT_UINT16, BASE_HEX,
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VALS(stype_vals), XDLC_S_FTYPE_MASK, NULL, HFILL }},
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{ &hf_v120_u_modifier_cmd,
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{ "Command", "v120.control.u_modifier_cmd", FT_UINT8, BASE_HEX,
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VALS(modifier_vals_cmd), XDLC_U_MODIFIER_MASK, NULL, HFILL }},
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{ &hf_v120_u_modifier_resp,
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{ "Response", "v120.control.u_modifier_resp", FT_UINT8, BASE_HEX,
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VALS(modifier_vals_resp), XDLC_U_MODIFIER_MASK, NULL, HFILL }},
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{ &hf_v120_ftype_i,
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{ "Frame type", "v120.control.ftype", FT_UINT16, BASE_HEX,
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VALS(ftype_vals), XDLC_I_MASK, NULL, HFILL }},
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{ &hf_v120_ftype_s_u,
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{ "Frame type", "v120.control.ftype", FT_UINT8, BASE_HEX,
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VALS(ftype_vals), XDLC_S_U_MASK, NULL, HFILL }},
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{ &hf_v120_ftype_s_u_ext,
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{ "Frame type", "v120.control.ftype", FT_UINT16, BASE_HEX,
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VALS(ftype_vals), XDLC_S_U_MASK, NULL, HFILL }},
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{ &hf_v120_header8,
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{ "Header", "v120.header", FT_UINT8, BASE_HEX, NULL, 0x0,
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NULL, HFILL }},
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{ &hf_v120_header_ext8,
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{ "Extension octet", "v120.header.ext", FT_BOOLEAN, 8, TFS(&tfs_yes_no), 0x80,
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NULL, HFILL }},
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{ &hf_v120_header_break8,
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{ "Break condition", "v120.header.break", FT_BOOLEAN, 8, TFS(&tfs_yes_no), 0x40,
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NULL, HFILL }},
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{ &hf_v120_header_error_control8,
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{ "Error control C1/C2", "v120.error_control", FT_UINT8, BASE_HEX, NULL, 0x0C,
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NULL, HFILL }},
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{ &hf_v120_header_segb8,
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{ "Bit B", "v120.header.segb", FT_BOOLEAN, 8, TFS(&tfs_segmentation_no_segmentation), 0x02,
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NULL, HFILL }},
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{ &hf_v120_header_segf8,
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{ "Bit F", "v120.header.segf", FT_BOOLEAN, 8, TFS(&tfs_segmentation_no_segmentation), 0x01,
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NULL, HFILL }},
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{ &hf_v120_header16,
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{ "Header", "v120.header", FT_UINT16, BASE_HEX, NULL, 0x0,
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NULL, HFILL }},
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{ &hf_v120_header_ext16,
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{ "Extension octet", "v120.header.ext", FT_BOOLEAN, 16, TFS(&tfs_yes_no), 0x80,
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NULL, HFILL }},
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{ &hf_v120_header_break16,
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{ "Break condition", "v120.header.break", FT_BOOLEAN, 16, TFS(&tfs_yes_no), 0x40,
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NULL, HFILL }},
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{ &hf_v120_header_error_control16,
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{ "Error control C1/C2", "v120.error_control", FT_UINT16, BASE_HEX, NULL, 0x0C,
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NULL, HFILL }},
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{ &hf_v120_header_segb16,
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{ "Bit B", "v120.header.segb", FT_BOOLEAN, 16, TFS(&tfs_segmentation_no_segmentation), 0x02,
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NULL, HFILL }},
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{ &hf_v120_header_segf16,
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{ "Bit F", "v120.header.segf", FT_BOOLEAN, 16, TFS(&tfs_segmentation_no_segmentation), 0x01,
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NULL, HFILL }},
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{ &hf_v120_header_e,
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{ "E", "v120.header.e", FT_BOOLEAN, 16, TFS(&tfs_yes_no), 0x8000,
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NULL, HFILL }},
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{ &hf_v120_header_dr,
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{ "DR", "v120.header.dr", FT_BOOLEAN, 16, TFS(&tfs_yes_no), 0x4000,
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NULL, HFILL }},
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{ &hf_v120_header_sr,
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{ "SR", "v120.header.sr", FT_BOOLEAN, 16, TFS(&tfs_yes_no), 0x2000,
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NULL, HFILL }},
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{ &hf_v120_header_rr,
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{ "RR", "v120.header.rr", FT_BOOLEAN, 16, TFS(&tfs_yes_no), 0x1000,
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NULL, HFILL }},
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};
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static gint *ett[] = {
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&ett_v120,
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&ett_v120_address,
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&ett_v120_control,
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&ett_v120_header,
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};
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proto_v120 = proto_register_protocol("Async data over ISDN (V.120)",
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"V.120", "v120");
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proto_register_field_array (proto_v120, hf, array_length(hf));
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proto_register_subtree_array(ett, array_length(ett));
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register_dissector("v120", dissect_v120, proto_v120);
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}
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/*
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* Editor modelines - http://www.wireshark.org/tools/modelines.html
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*
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* Local variables:
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* c-basic-offset: 8
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* tab-width: 8
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* indent-tabs-mode: t
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* End:
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*
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* vi: set shiftwidth=8 tabstop=8 noexpandtab:
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* :indentSize=8:tabSize=8:noTabs=false:
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*/
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