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commit aad62461f2d77467587d3691709e1f4dffcdcf1f Author: Harald Welte laforge@gnumonks.org Date: Sat Oct 22 09:41:29 2016 +0200

[WIP] gsm_abis_pgsl: attempt to feed EGPRS headers/blocks into RLC/MAC dissector

Change-Id: I18b363816c10df24933df2c3fa945be2559daa28

http://cgit.osmocom.org/wireshark/commit/?id=5d03522521ea81db51aef75143ef1f2...

commit 5d03522521ea81db51aef75143ef1f2ba242a439 Author: Harald Welte laforge@gnumonks.org Date: Fri Oct 21 23:08:52 2016 +0200

gsm_abis_pgsl: Fix Frame Number handling

The FN is encoded as 24bit big-endian figure, so fix endianness for uplink. Also, make sure to pass the frame number into the RLC/MAC dissector using the private data.

Change-Id: I2cd2e104a45a1ff63dfbc9ce1709ff0ccc6eb5be

http://cgit.osmocom.org/wireshark/commit/?id=969b9119657d0be5aac672ae00b699f...

commit 969b9119657d0be5aac672ae00b699fe8d36f8c2 Author: Harald Welte laforge@gnumonks.org Date: Fri Oct 21 21:55:56 2016 +0200

gsm_abis_pgsl: Hand off into GPRS RLC/MAC dissector

Rather than displaying the P-GSL data as "data", let's call the proper GPRS RLC/MAC dissector to get a decode of the payload.

Change-Id: Ib081606c1b7af2a15ecf3c5f5b3ff44b5096e865

http://cgit.osmocom.org/wireshark/commit/?id=930e1eccde78f90db1f52d6f75a9a06...

commit 930e1eccde78f90db1f52d6f75a9a060b8d96a0f Author: Harald Welte laforge@gnumonks.org Date: Fri Oct 21 21:52:51 2016 +0200

gsm_abis_pgsl: Fix conditional Incremental Redundancy IEs

There are some IEs in the Downlink Data Indication which are conditional to the use of EGPRs. However, we still don't see them in the traces, so let's deactivate that part for now.

Change-Id: I408c73e5f48018d3ea4ebcacb7bd94358a9eaac5

http://cgit.osmocom.org/wireshark/commit/?id=c90c15013426d9f011b4484ca0185eb...

commit c90c15013426d9f011b4484ca0185eb213afd376 Author: Harald Welte laforge@gnumonks.org Date: Fri Oct 21 20:45:59 2016 +0200

gsm_abis_om2000: Dissect TLV structure of 0xa3/0xa5/0xa6 TLVs

We have no idea what those TLVs are, but the message hex-dumps clearly indicate a 8-bit tag followed by 8-bit length and then 'length' amount of bytes, so we can at least dissect that high-level structure for now.

They appear in equally unknown message type 0x126, which appears to be sent in intervals of 300s by the RBS.

Change-Id: I91817eb20de1a4557399235c1fc42b638b9c935b

http://cgit.osmocom.org/wireshark/commit/?id=839cb7150e95570a4435350aaf5ab9e...

commit 839cb7150e95570a4435350aaf5ab9e8f86daf22 Author: Harald Welte laforge@gnumonks.org Date: Sun Oct 16 14:08:42 2016 +0200

gsm_abis_tfp: Detect + display AMR rate based on payload length

Change-Id: I1af7e3be87da9416ded02b09c480ea69ec58afff

http://cgit.osmocom.org/wireshark/commit/?id=f3b96023a168479b36a0ccdd9885d59...

commit f3b96023a168479b36a0ccdd9885d598fe317bf1 Author: Harald Welte laforge@gnumonks.org Date: Sun Oct 16 14:07:39 2016 +0200

gsm_abis_tfp: Fix bit-mask for frame type

The frame type is only a select number of bits in the given byte, so we must make sure to mask all toher bits away using 0x1E.

Change-Id: I6c7a1a256bd93b6e5149f50ed64f033836a26673

http://cgit.osmocom.org/wireshark/commit/?id=a3fc38deb7b4511333b57ab5e42c26b...

commit a3fc38deb7b4511333b57ab5e42c26b86d441873 Author: Harald Welte laforge@gnumonks.org Date: Sat Oct 15 23:26:17 2016 +0200

packet-rsl: Add some extensions to RSL shared by Osmocom + Ericsson

Activation of (dynamic) PDCH uses some slight extensions of the definitions found in 3GPP TS 48.058 when used on Ericsson RBS2000 or Osmocom OsmoBTS.

The extensions are backwards-compatible, so I don't think it's worth to introduce a preference for this.

Change-Id: I8e28d75bd8be15044a605ced8825b9b074ffbb22

http://cgit.osmocom.org/wireshark/commit/?id=3edfc8144682c8ff408275ca214d5ae...

commit 3edfc8144682c8ff408275ca214d5aeed069264f Author: Harald Welte laforge@gnumonks.org Date: Sat Oct 15 22:02:47 2016 +0200

gsm_abis_om2000: Add very basic dissection of "MO Record"

The MO Record is returned in response to a Capabilities Request and describes the capabilities of he MO in more detail. The exact coding of the contents is not yet known at this point.

Change-Id: Iddfe60d286a85585bec58d340bdee793d3bfca2e

http://cgit.osmocom.org/wireshark/commit/?id=490e7972a684d24201e256544bc20d4...

commit 490e7972a684d24201e256544bc20d4a58d2c7d5 Author: Harald Welte laforge@gnumonks.org Date: Sat Oct 15 22:01:51 2016 +0200

gsm_abis_om2000: Add "TG" and "DP" MO Class names

Change-Id: Ice9d0601b2b1aa0691b7fcacaf61b4e287c7725c

http://cgit.osmocom.org/wireshark/commit/?id=c240e3831d6fc7136744aee0e494704...

commit c240e3831d6fc7136744aee0e4947048452ae886 Author: Harald Welte laforge@gnumonks.org Date: Sat Oct 15 20:18:16 2016 +0200

gsm_abis_om2000: Issue Expert Info when Enable Result != ENABLED

The point of sending an Enable Request is to enable the respective MO. If the MO responds with any MO state != ENABLED there is something fishy. Let's inform the user with some Expert Info about it.

Change-Id: Ib33e5dbc37894049b93bb71782787b8c96c04326

http://cgit.osmocom.org/wireshark/commit/?id=7928b3da367d2087e7564c7a208e0fa...

commit 7928b3da367d2087e7564c7a208e0fa9500c245c Author: Harald Welte laforge@gnumonks.org Date: Sat Oct 15 20:04:41 2016 +0200

gsm_abis_om2000: Introduce expoert info for unusual situations

In OM2000, it is not usual to receive NACK, REJECT or "performed not according to request" type messages. Let's highlight them using expert info as a convenience to the user.

Change-Id: I47b865c32fd9ec82ec63699babd31f3849f3006c

http://cgit.osmocom.org/wireshark/commit/?id=08340142c48dce17582a74a8d114443...

commit 08340142c48dce17582a74a8d114443e02ba2f7e Author: Harald Welte laforge@gnumonks.org Date: Sat Oct 15 19:16:39 2016 +0200

gsm_abis_om2000: Decode the IWD Type/Gen/Rev in Negotiation Request

The Negotiation Request and Negotiation Requeset ACK contain IWD (Inter Working Document) revision numbers for the different A-bis protocols OML, RSL, GSL (GPRS) and TRA (TRAU). Decode them in a way suitable for human consumption.

Change-Id: I5b11e64ca252b7349900ba5b700c2faefd568441

-----------------------------------------------------------------------

Summary of changes: epan/dissectors/packet-gsm_abis_om2000.c | 9 +++ epan/dissectors/packet-gsm_abis_pgsl.c | 129 +++++++++++++++++++++++++++---- epan/dissectors/packet-gsm_abis_tfp.c | 40 +++++++++- epan/dissectors/packet-gsmtap.c | 7 -- 4 files changed, 163 insertions(+), 22 deletions(-)

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