| /* encoding.cpp |
| * |
| * Copyright (C) 2012 Ivan Klyuchnikov |
| * Copyright (C) 2012 Andreas Eversberg <jolly@eversberg.eu> |
| * Copyright (C) 2013 by Holger Hans Peter Freyther |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License |
| * as published by the Free Software Foundation; either version 2 |
| * of the License, or (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| */ |
| #pragma once |
| |
| #include <stdint.h> |
| #include <gsm_rlcmac.h> |
| #include <gprs_coding_scheme.h> |
| |
| struct gprs_rlcmac_bts; |
| struct gprs_rlcmac_tbf; |
| struct bitvec; |
| struct gprs_llc; |
| struct gprs_rlc_data_block_info; |
| |
| /** |
| * I help with encoding data into CSN1 messages. |
| * TODO: Nobody can remember a function signature like this. One should |
| * fill out a struct with the request parameters and then hand the struct |
| * to the code. |
| */ |
| class Encoding { |
| public: |
| static int write_immediate_assignment( |
| struct gprs_rlcmac_bts *bts, |
| bitvec * dest, uint8_t downlink, uint8_t ra, |
| uint32_t ref_fn, uint8_t ta, uint16_t arfcn, uint8_t ts, uint8_t tsc, |
| uint8_t tfi, uint8_t usf, uint32_t tlli, uint8_t polling, |
| uint32_t fn, uint8_t single_block, uint8_t alpha, uint8_t gamma, |
| int8_t ta_idx); |
| |
| static void write_packet_uplink_assignment( |
| struct gprs_rlcmac_bts *bts, |
| bitvec * dest, uint8_t old_tfi, |
| uint8_t old_downlink, uint32_t tlli, uint8_t use_tlli, |
| struct gprs_rlcmac_ul_tbf *tbf, uint8_t poll, uint8_t alpha, |
| uint8_t gamma, int8_t ta_idx, int8_t use_egprs); |
| |
| static void write_packet_downlink_assignment(RlcMacDownlink_t * block, |
| uint8_t old_tfi, uint8_t old_downlink, |
| struct gprs_rlcmac_tbf *tbf, uint8_t poll, uint8_t alpha, |
| uint8_t gamma, int8_t ta_idx, uint8_t ta_ts, |
| bool use_egprs); |
| |
| static void encode_rbb(const char *show_rbb, uint8_t *rbb); |
| |
| static void write_packet_uplink_ack( |
| struct gprs_rlcmac_bts *bts, bitvec * dest, |
| struct gprs_rlcmac_ul_tbf *tbf, bool is_final); |
| |
| static int write_paging_request(bitvec * dest, uint8_t *ptmsi, uint16_t ptmsi_len); |
| |
| static unsigned write_repeated_page_info(bitvec * dest, unsigned& wp, uint8_t len, |
| uint8_t *identity, uint8_t chan_needed); |
| |
| static unsigned write_packet_paging_request(bitvec * dest); |
| |
| static int rlc_write_dl_data_header( |
| const struct gprs_rlc_data_info *rlc, |
| uint8_t *data); |
| static unsigned int rlc_copy_from_aligned_buffer( |
| const struct gprs_rlc_data_info *rlc, |
| unsigned int data_block_idx, |
| uint8_t *dst, const uint8_t *buffer); |
| |
| enum AppendResult { |
| AR_NEED_MORE_BLOCKS, |
| AR_COMPLETED_SPACE_LEFT, |
| AR_COMPLETED_BLOCK_FILLED, |
| }; |
| |
| static AppendResult rlc_data_to_dl_append( |
| struct gprs_rlc_data_block_info *rdbi, GprsCodingScheme cs, |
| gprs_llc *llc, int *offset, int *num_chunks, |
| uint8_t *data, |
| bool is_final); |
| }; |