1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
|
/* packet-rlc-lte.h
*
* Martin Mathieson
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#ifndef PACKET_RLC_LTE_H
#define PACKET_RLC_LTE_H
/* rlcMode */
#define RLC_TM_MODE 1
#define RLC_UM_MODE 2
#define RLC_AM_MODE 4
#define RLC_PREDEF 8
/* direction */
#define DIRECTION_UPLINK 0
#define DIRECTION_DOWNLINK 1
/* priority ? */
/* channelType */
#define CHANNEL_TYPE_CCCH 1
#define CHANNEL_TYPE_BCCH_BCH 2
#define CHANNEL_TYPE_PCCH 3
#define CHANNEL_TYPE_SRB 4
#define CHANNEL_TYPE_DRB 5
#define CHANNEL_TYPE_BCCH_DL_SCH 6
#define CHANNEL_TYPE_MCCH 7
#define CHANNEL_TYPE_MTCH 8
/* sequenceNumberLength */
#define UM_SN_LENGTH_5_BITS 5
#define UM_SN_LENGTH_10_BITS 10
#define AM_SN_LENGTH_10_BITS 10
#define AM_SN_LENGTH_16_BITS 16
typedef enum rlc_lte_nb_mode {
rlc_no_nb_mode = 0,
rlc_nb_mode = 1
} rlc_lte_nb_mode;
/* Info attached to each LTE RLC frame */
typedef struct rlc_lte_info
{
guint8 rlcMode;
guint8 direction;
guint8 priority;
guint8 sequenceNumberLength;
guint16 ueid;
guint16 channelType;
guint16 channelId; /* for SRB: 1=SRB1, 2=SRB2, 3=SRB1bis; for DRB: DRB ID */
guint16 pduLength;
gboolean extendedLiField;
rlc_lte_nb_mode nbMode;
} rlc_lte_info;
typedef struct rlc_lte_tap_info {
/* Info from context */
guint8 rlcMode;
guint8 direction;
guint8 priority;
guint16 ueid;
guint16 channelType;
guint16 channelId;
guint16 pduLength;
guint8 sequenceNumberLength;
nstime_t rlc_lte_time;
guint8 loggedInMACFrame;
guint16 sequenceNumber;
guint8 isResegmented;
guint8 isControlPDU;
guint16 ACKNo;
#define MAX_NACKs 128
guint16 noOfNACKs;
guint16 NACKs[MAX_NACKs];
guint16 missingSNs;
} rlc_lte_tap_info;
/* Configure number of PDCP SN bits to use for DRB channels. */
void set_rlc_lte_drb_pdcp_seqnum_length(packet_info *pinfo, guint16 ueid, guint8 drbid, guint8 userplane_seqnum_length);
/* Configure LI field for AM DRB channels. */
void set_rlc_lte_drb_li_field(packet_info *pinfo, guint16 ueid, guint8 drbid, gboolean ul_ext_li_field, gboolean dl_ext_li_field);
/**********************************************************************/
/* UDP framing format */
/* ----------------------- */
/* Several people have asked about dissecting RLC by framing */
/* PDUs over IP. A suggested format over UDP has been defined */
/* and implemented by this dissector, using the definitions */
/* below. A link to an example program showing you how to encode */
/* these headers and send LTE RLC PDUs on a UDP socket is */
/* provided at https://gitlab.com/wireshark/wireshark/-/wikis/RLC-LTE */
/* */
/* A heuristic dissector (enabled by a preference) will */
/* recognise a signature at the beginning of these frames. */
/* Until someone is using this format, suggestions for changes */
/* are welcome. */
/**********************************************************************/
/* Signature. Rather than try to define a port for this, or make the
port number a preference, frames will start with this string (with no
terminating NULL */
#define RLC_LTE_START_STRING "rlc-lte"
/* Fixed field. This is followed by the following 1 mandatory field:
- rlcMode (1 byte)
(where the allowed values are defined above */
/* Conditional field. This field is mandatory in case of RLC Unacknowledged mode.
In case of RLC Acknowledged mode, the field is optional (assume 10 bits by default).
The format is to have the tag, followed by the value (there is no length field,
it's implicit from the tag). The allowed values are defined above. */
#define RLC_LTE_SN_LENGTH_TAG 0x02
/* 1 byte */
/* Optional fields. Attaching this info to frames will allow you
to show you display/filter/plot/add-custom-columns on these fields, so should
be added if available.
The format is to have the tag, followed by the value (there is no length field,
it's implicit from the tag) */
#define RLC_LTE_DIRECTION_TAG 0x03
/* 1 byte */
#define RLC_LTE_PRIORITY_TAG 0x04
/* 1 byte */
#define RLC_LTE_UEID_TAG 0x05
/* 2 bytes, network order */
#define RLC_LTE_CHANNEL_TYPE_TAG 0x06
/* 2 bytes, network order */
#define RLC_LTE_CHANNEL_ID_TAG 0x07
/* 2 bytes, network order */
#define RLC_LTE_EXT_LI_FIELD_TAG 0x08
/* 0 byte, tag presence indicates that AM DRB PDU is using an extended LI field of 15 bits */
#define RLC_LTE_NB_MODE_TAG 0x09
/* 1 byte containing rlc_lte_nb_mode enum value */
/* RLC PDU. Following this tag comes the actual RLC PDU (there is no length, the PDU
continues until the end of the frame) */
#define RLC_LTE_PAYLOAD_TAG 0x01
#endif
/*
* Editor modelines - https://www.wireshark.org/tools/modelines.html
*
* Local variables:
* c-basic-offset: 4
* tab-width: 8
* indent-tabs-mode: nil
* End:
*
* vi: set shiftwidth=4 tabstop=8 expandtab:
* :indentSize=4:tabSize=8:noTabs=true:
*/
|
