| /* 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. |
| */ |
| #pragma once |
| |
| #include <stdint.h> |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| #include <osmocom/gsm/l1sap.h> |
| #include "coding_scheme.h" |
| #include "gsm_rlcmac.h" |
| #ifdef __cplusplus |
| } |
| #endif |
| |
| struct gprs_rlcmac_tbf; |
| struct bitvec; |
| struct gprs_llc; |
| struct gprs_rlc_data_block_info; |
| |
| #ifdef __cplusplus |
| /** |
| * 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( |
| const struct gprs_rlcmac_pdch *pdch, |
| const struct gprs_rlcmac_tbf *tbf, |
| bitvec * dest, bool downlink, uint16_t ra, |
| uint32_t ref_fn, uint8_t ta, |
| uint8_t usf, bool polling, |
| uint32_t fn, uint8_t alpha, uint8_t gamma, |
| int8_t ta_idx, |
| enum ph_burst_type burst_type); |
| |
| static int write_immediate_assignment_reject( |
| bitvec *dest, uint16_t ra, |
| uint32_t ref_fn, |
| enum ph_burst_type burst_type, |
| uint8_t t3142 |
| ); |
| |
| static void encode_rbb(const char *show_rbb, bitvec *rbb); |
| |
| static int write_paging_request(bitvec * dest, const struct osmo_mobile_identity *mi); |
| |
| 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, enum CodingScheme cs, |
| gprs_llc *llc, int *offset, int *num_chunks, |
| uint8_t *data, bool is_final, int *count_payload); |
| static void rlc_data_to_dl_append_egprs_li_padding( |
| const struct gprs_rlc_data_block_info *rdbi, |
| int *offset, int *num_chunks, uint8_t *data_block); |
| }; |
| |
| #endif /* ifdef __cplusplus */ |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| void write_packet_access_reject(struct bitvec *dest, uint32_t tlli, unsigned long t3172_ms); |
| void write_packet_uplink_assignment(RlcMacDownlink_t *block, uint8_t old_tfi, |
| uint8_t old_downlink, uint32_t tlli, uint8_t use_tlli, |
| const struct gprs_rlcmac_ul_tbf *tbf, uint8_t poll, |
| uint8_t rrbp, uint8_t alpha, uint8_t gamma, int8_t ta_idx, |
| bool use_egprs); |
| |
| void write_packet_downlink_assignment(RlcMacDownlink_t * block, bool old_tfi_is_valid, |
| uint8_t old_tfi, uint8_t old_downlink, |
| const struct gprs_rlcmac_dl_tbf *tbf, uint8_t poll, |
| uint8_t rrbp, uint8_t alpha, uint8_t gamma, |
| int8_t ta_idx, uint8_t ta_ts, bool use_egprs, |
| uint8_t control_ack); |
| |
| void write_packet_uplink_ack(struct bitvec *dest, struct gprs_rlcmac_ul_tbf *tbf, |
| bool is_final, uint8_t rrbp); |
| |
| void write_packet_neighbour_cell_data(RlcMacDownlink_t *block, |
| bool tfi_is_dl, uint8_t tfi, uint8_t container_id, |
| uint8_t container_idx, PNCDContainer_t *container); |
| |
| void write_packet_cell_change_continue(RlcMacDownlink_t *block, uint8_t poll, uint8_t rrbp, |
| bool tfi_is_dl, uint8_t tfi, bool exist_id, |
| uint16_t arfcn, uint8_t bsic, uint8_t container_id); |
| |
| #ifdef __cplusplus |
| } |
| #endif |