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epan
dissectors
packet-umts_rlc.h
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/* packet-umts_rlc.h
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <
[email protected]
>
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* Copyright 1998 Gerald Combs
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#ifndef PACKET_RLC_H
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#define PACKET_RLC_H
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#include <
wiretap/wtap.h
>
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/* Do not change enum order and append only to keep
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backward compatibility with UDP framing format */
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enum
rlc_mode {
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RLC_TM,
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RLC_UM,
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RLC_AM,
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RLC_UNKNOWN_MODE
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};
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/* Do not change enum order and append only to keep
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backward compatibility with UDP framing format */
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enum
rlc_li_size {
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RLC_LI_VARIABLE,
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RLC_LI_7BITS,
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RLC_LI_15BITS
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};
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#define MAX_RLC_CHANS 64
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typedef
struct
rlc_info
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{
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/* Values in the 'ueid' array should identify users exclusively */
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/* Preferred content: */
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/* 1. U-RNTI */
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/* 2. C-RNC Context (from NBAP) */
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uint32_t ueid[MAX_RLC_CHANS];
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uint8_t mode[MAX_RLC_CHANS];
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uint8_t rbid[MAX_RLC_CHANS];
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enum
rlc_li_size li_size[MAX_RLC_CHANS];
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bool
ciphered[MAX_RLC_CHANS];
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bool
deciphered[MAX_RLC_CHANS];
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}
rlc_info
;
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/* Reset the specified channel's reassembly data, useful for when a sequence
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* resets on transport channel swap. */
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void
rlc_reset_channel(
enum
rlc_mode mode, uint8_t rbid, uint8_t dir, uint32_t ueid,
struct
atm_phdr
*atm);
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/*****************************************************************/
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/* UDP framing format */
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/* ----------------------- */
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/* Several people have asked about dissecting RLC by framing */
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/* PDUs over IP. A suggested format over UDP has been defined */
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/* and implemented by this dissector, using the definitions */
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/* below. A link to an example program showing you how to encode */
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/* these headers and send RLC PDUs on a UDP socket is provided */
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/* at https://gitlab.com/wireshark/wireshark/-/wikis/RLC */
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/* */
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/* A heuristic dissector (enabled by a preference) will */
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/* recognise a signature at the beginning of these frames. */
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/* Until someone is using this format, suggestions for changes */
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/* are welcome. */
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/*****************************************************************/
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/* Signature. Rather than try to define a port for this, or make the
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port number a preference, frames will start with this string (with no
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terminating NULL */
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#define RLC_START_STRING "umts-rlc"
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/* Conditional fields. The channel type or RLC mode should be present.
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If the channel type is present, the RLC mode will be ignored.
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If none of them is present, the decoding will be skipped.
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The RLC mode tag uses the values from the rlc_mode enum. */
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#define UMTS_CHANNEL_TYPE_UNSPECIFIED 0
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#define UMTS_CHANNEL_TYPE_PCCH 1
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#define UMTS_CHANNEL_TYPE_CCCH 2
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#define UMTS_CHANNEL_TYPE_DCCH 3
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#define UMTS_CHANNEL_TYPE_PS_DTCH 4
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#define UMTS_CHANNEL_TYPE_CTCH 5
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#define UMTS_CHANNEL_TYPE_BCCH 6
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#define RLC_CHANNEL_TYPE_TAG 0x02
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/* 1 byte */
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#define RLC_MODE_TAG 0x03
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/* 1 byte, enum rlc_mode value */
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/* Optional fields. Attaching this info to frames will allow you
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to show you display/filter/plot/add-custom-columns on these fields, so should
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be added if available.
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The format is to have the tag, followed by the value (there is no length field,
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it's implicit from the tag) */
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#define DIRECTION_UPLINK 0
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#define DIRECTION_DOWNLINK 1
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#define RLC_DIRECTION_TAG 0x04
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/* 1 byte */
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#define RLC_URNTI_TAG 0x05
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/* 4 bytes, network order */
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#define RLC_RADIO_BEARER_ID_TAG 0x06
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/* 1 byte */
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#define RLC_LI_SIZE_TAG 0x07
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/* 1 byte, enum rlc_li_size value */
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/* RLC PDU. Following this tag comes the actual RLC PDU (there is no length, the PDU
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continues until the end of the frame) */
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#define RLC_PAYLOAD_TAG 0x01
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#endif
/* PACKET_RLC_H */
atm_phdr
Definition
wtap.h:487
rlc_info
Definition
packet-umts_rlc.h:34
wtap.h
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