Wireshark 4.5.0
The Wireshark network protocol analyzer
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xdlc.h
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1/* xdlc.h
2 * Define *DLC frame types, and routine to dissect the control field of
3 * a *DLC frame.
4 *
5 * Wireshark - Network traffic analyzer
6 * By Gerald Combs <[email protected]>
7 * Copyright 1998 Gerald Combs
8 *
9 * SPDX-License-Identifier: GPL-2.0-or-later
10 */
11
12#ifndef __XDLC_H__
13#define __XDLC_H__
14
15#include "ws_symbol_export.h"
16
21/*
22 * Low-order bits of first (extended) or only (basic) octet of control
23 * field, specifying the frame type.
24 */
25#define XDLC_I_MASK 0x01
26#define XDLC_I 0x00
27#define XDLC_S_U_MASK 0x03
28#define XDLC_S 0x01
29#define XDLC_U 0x03
31/*
32 * N(S) and N(R) fields, in basic and extended operation.
33 */
34#define XDLC_N_R_MASK 0xE0
35#define XDLC_N_R_SHIFT 5
36#define XDLC_N_R_EXT_MASK 0xFE00
37#define XDLC_N_R_EXT_SHIFT 9
38#define XDLC_N_S_MASK 0x0E
39#define XDLC_N_S_SHIFT 1
40#define XDLC_N_S_EXT_MASK 0x00FE
41#define XDLC_N_S_EXT_SHIFT 1
42
43/*
44 * Poll/Final bit, in basic and extended operation.
45 */
46#define XDLC_P_F 0x10
47#define XDLC_P_F_EXT 0x0100
49/*
50 * S-format frame types.
51 */
52#define XDLC_S_FTYPE_MASK 0x0C
53#define XDLC_RR 0x00
54#define XDLC_RNR 0x04
55#define XDLC_REJ 0x08
56#define XDLC_SREJ 0x0C
58/*
59 * U-format modifiers.
60 */
61#define XDLC_U_MODIFIER_MASK 0xEC
62#define XDLC_UI 0x00
63#define XDLC_UP 0x20
64#define XDLC_DISC 0x40
65#define XDLC_RD 0x40
66#define XDLC_UA 0x60
67#define XDLC_SNRM 0x80
68#define XDLC_TEST 0xE0
69#define XDLC_SIM 0x04
70#define XDLC_RIM 0x04
71#define XDLC_FRMR 0x84
72#define XDLC_CFGR 0xC4
73#define XDLC_SARM 0x0C
74#define XDLC_DM 0x0C
75#define XDLC_SABM 0x2C
76#define XDLC_SARME 0x4C
77#define XDLC_SABME 0x6C
78#define XDLC_RESET 0x8C
79#define XDLC_XID 0xAC
80#define XDLC_SNRME 0xCC
81#define XDLC_BCN 0xEC
90#define XDLC_IS_INFORMATION(control) \
91 (((control) & XDLC_I_MASK) == XDLC_I || (control) == (XDLC_UI|XDLC_U))
92
99#define XDLC_CONTROL_LEN(control, is_extended) \
100 ((((control) & XDLC_S_U_MASK) == XDLC_U || !(is_extended)) ? 1 : 2)
101
106typedef struct {
107 int *hf_xdlc_n_r;
108 int *hf_xdlc_n_s;
109 int *hf_xdlc_p;
110 int *hf_xdlc_f;
111 int *hf_xdlc_s_ftype;
112 int *hf_xdlc_u_modifier_cmd;
113 int *hf_xdlc_u_modifier_resp;
114 int *hf_xdlc_ftype_i;
115 int *hf_xdlc_ftype_s_u;
117
118extern const value_string ftype_vals[];
119extern const value_string stype_vals[];
120extern const value_string modifier_vals_cmd[];
121extern const value_string modifier_vals_resp[];
122
123extern int get_xdlc_control(const uint8_t *pd, int offset, bool is_extended);
124
125WS_DLL_PUBLIC int dissect_xdlc_control(tvbuff_t *tvb, int offset, packet_info *pinfo,
126 proto_tree *xdlc_tree, int hf_xdlc_control, int ett_xdlc_control,
127 const xdlc_cf_items *cf_items_nonext, const xdlc_cf_items *cf_items_ext,
128 const value_string *u_modifier_short_vals_cmd,
129 const value_string *u_modifier_short_vals_resp, bool is_response,
130 bool is_extended, bool append_info);
131
132#endif
Definition packet_info.h:43
Definition proto.h:901
Definition value_string.h:25
Definition tvbuff-int.h:35
Definition xdlc.h:106