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2016-07-14egprs: Use RLC/MAC headers from libosmocoreTom Tsou1-9/+10
EGPRS Type 1, 2, and 3 headers are used by OsmoPCU and OsmoBTS. Move the header definitions to libosmocore to be shared by both packages. Modify the struct variable naming to use *_hi/*_lo instead of *_a/*_b in order to be consistent with existing naming used in libosmocore. Change-Id: I98687ad981d27502aec42729611937ba1caf207c
2016-06-16Add header type 1 support for EGPRS uplinkAravind Sirsikar1-2/+61
Function is added to parse the EGPRS header type 1 in uplink tbf path. along with configuration parameter updation to reflect max mcs in UL Change-Id: I13c250e2e07377982ac3f29745f3cffd4088552a Reviewed-on: https://gerrit.osmocom.org/270 Reviewed-by: Harald Welte <laforge@gnumonks.org> Tested-by: Jenkins Builder
2016-06-16Add Header Type2 support in EGPRS ULAravind Sirsikar1-3/+49
This patch will add support for MCS5,6 in EGPRS UL along with incorrect assert correction to let MCS 6 work. Change-Id: Iac2422c8acbdcefe20aafbba6a4eb87c9893e3ba Reviewed-on: https://gerrit.osmocom.org/269 Tested-by: Jenkins Builder Reviewed-by: Harald Welte <laforge@gnumonks.org>
2016-06-01decoding: remove superfluous double-semicolonAlexander Couzens1-1/+1
Change-Id: I48ec24f2e10620279cbcbf39c70a4be6438f6b0f Reviewed-on: https://gerrit.osmocom.org/140 Reviewed-by: Harald Welte <laforge@gnumonks.org> Tested-by: Jenkins Builder
2016-05-31decoding: improve and add commentsAlexander Couzens1-1/+2
Change-Id: I45c9fc55243224909ca2fdece8cbfa686b0f444d Reviewed-on: https://gerrit.osmocom.org/139 Tested-by: Jenkins Builder Reviewed-by: Harald Welte <laforge@gnumonks.org>
2016-03-30Refactor the Uplink RLC header parsing functionBhargava Abhyankar1-64/+76
Parsing the uplink data header for GPRS and EGPRS header type 3 is handled in separate functions. This patch will enhance modularity of the code.
2016-02-08rlc: Use the rlc structure to access the data unit in the RLC messageJacob Erlbeck1-17/+21
Currently most offsets are hard-coded which makes it difficult to access the data units and their headers when padding has to be taken into account. These offset are already provided by the gprs_rlc_data_info_init_ul/dl functions. Change the encoder/decoder to use these values. Note that some assumptions (bit alignment) are still present in the code and checked by assertions. Sponsored-by: On-Waves ehf
2016-02-08edge: Add a bitvec based Decoding::extract_rbb functionJacob Erlbeck1-0/+12
This shall replace the old one after the transition to bitvec based RBBs. Sponsored-by: On-Waves ehf
2016-02-08decode: Add bitvec based GPRS DL ACK/NACK decoderJacob Erlbeck1-0/+47
Currently the RBB is used and passed directly to the window handling methods. For EGPRS a more abstract bitvec is derived from the messages and will passed around instead. Add a similar function for GPRS so that the same window handling can be used for GPRS and EGPRS. Sponsored-by: On-Waves ehf
2016-02-08edge: Enable CRBB decodingJacob Erlbeck1-13/+1
Currently CRBB bitmaps are ignored if they are present. This commit enables the decoding. Note that this requires osmo_t4_decode in libosmocore. Sponsored-by: On-Waves ehf
2016-02-08edge: Add experimental support for uplink CRBBJacob Erlbeck1-27/+67
Currently only uncompressed bitmaps (URBB) are supported in PACKET UPLINK ACK/NACK messages. Extend decode_egprs_acknack_bits to decode compressed bitmaps (CRBB), too. Note that this code is only active, if the macro WITH_CRBB_DECODING is defined. Sponsored-by: On-Waves ehf
2016-02-08edge: Handle EGPRS PACKET DOWNLINK ACK NACKJacob Erlbeck1-0/+91
Currently this message is ignored. Support decoding and handling of this message. Use a bitvec for the decoder that just represents a BSN sequence without any encoding details (first bit -> first BSN). Return the corresponding BSN range (snsmod(bsn_begin + bits_in_bitvec) = bsn_end), so snsmod(bsn_end-1) is the last BSN if there is at least 1. If bsn_begin == bsn_end, no BSNs has been added. Note that this bitvec is not yet used for RBB handling. It just calls the old rcvd_dl_ack with a faked (all bits are 1) RBB map. Sponsored-by: On-Waves ehf
2016-02-05tbf: Remove obsolete TLLI functionsJacob Erlbeck1-41/+0
This commit removes gprs_rlcmac_tbf::extract_tlli and Decoding::tlli_from_ul_data. Sponsored-by: On-Waves ehf
2016-02-05edge: Rename gprs_rlc_ul_header_egprs and gprs_rlc_ul_data_block_infoJacob Erlbeck1-5/+5
These struct names are more specific than necessary. They are used for GPRS (uplink) already. In downlink direction, only a few fields will be added to the header struct. Add addition, gprs_rlc_ul_header_egprs does not map directly to an encoded header, like many other 'header' structs do. Change the names to fit both modes and both directions: gprs_rlc_ul_header_egprs -> gprs_rlc_data_info gprs_rlc_ul_data_block_info -> gprs_rlc_data_block_info Sponsored-by: On-Waves ehf
2016-01-08edge: Remove leftover comments from encoding.cJacob Erlbeck1-8/+0
Sponsored-by: On-Waves ehf
2016-01-08edge: Fix data block decoder (Coverity)Jacob Erlbeck1-1/+7
Use a signed integer instead of an unsigned one for num_chunks which can set to a negative value on error. Ensure that chunks is not dereferenced if it is NULL. In fact that will not happen currently, since num_chunks is now always <= 0 if chunks == NULL. Fixes: Coverity CID 1347433, 1347434, 1347435 Sponsored-by: On-Waves ehf
2015-12-16edge: Add unified decoder methods for GPRS/EGPRSJacob Erlbeck1-0/+422
This commit adds new RLC block decoder functions that support both GPRS and EGPRS. The code path is selected based on the value of the GprsCodingScheme cs object. - rlc_parse_ul_data_header parses the header of an RLC data block including the E and FBI/TI flags (currently supported CS-1 - CS-4, MCS-1 - MCS-4). - rlc_copy_to_aligned_buffer copies an RLC data unit to a byte aligned buffer and returns the unit's length. - rlc_get_data_aligned is a convenience wrapper around rlc_copy_to_aligned_buffer that avoids copying if the data unit is already byte aligned. Sponsored-by: On-Waves ehf
2015-11-30edge: Get EGPRS multislot classJacob Erlbeck1-0/+15
The EGPRS MS class ist contained in the MS_RA_capability information. Its presence indicates, that the MS is able (and willing) to use EGPRS. This commit implements basic support for retrieving, storing, and showing it in the VTY. The information is stored in the MS object. Sponsored-by: On-Waves ehf
2013-12-12decoding: Cosmetic - change rbb decodingDaniel Willmann1-2/+4
2013-12-12decoding: Use 'I' and 'R' in rbb array for DLDaniel Willmann1-1/+1
We want to match up rbb decoding and encoding so it helps to use the same chars.
2013-11-26tbf/rlc: Move the parsing of RBB to Decoding, move window marking outHolger Hans Peter Freyther1-0/+14
Move the parsing of the bitbmap out of the TBF code into Decoding. Move the updating of the V_B into the V_B class. Add some comments about handling the mod_sns, mod_sns_half parameters by using template code.
2013-10-30pdch: Move the giant switch/case of gprs_rlcmac_rcv_control_blockHolger Hans Peter Freyther1-0/+15
Move the dispatch into the PDCH. This needs to be split up further into understandable blocks.
2013-10-30pdch/tbf: Move gprs_rlcmac_rcv_data_block_acknowledged into the pdchHolger Hans Peter Freyther1-0/+70
Move the method into the PDCH. Extract the finding of TLLI into a new class called Decoding. Move the assemble and forward LLC frames into the TBF as it is poking in the internals of the TBF.
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