| /* gprs_rlcmac.h |
| * |
| * Copyright (C) 2012 Ivan Klyuchnikov |
| * |
| * 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. |
| */ |
| |
| #ifndef GPRS_RLCMAC_H |
| #define GPRS_RLCMAC_H |
| |
| #include <bitvector.h> |
| #include <gsm_rlcmac.h> |
| #include <gsm_timer.h> |
| |
| extern "C" { |
| #include <osmocom/core/linuxlist.h> |
| #include <osmocom/core/timer.h> |
| } |
| |
| #define LLC_MAX_LEN 1543 |
| #define UL_RLC_DATA_BLOCK_LEN 23 |
| |
| enum gprs_rlcmac_tbf_stage { |
| TBF_ESTABLISH, |
| TBF_DATA_TRANSFER, |
| TBF_RELEASE |
| }; |
| |
| enum gprs_rlcmac_tbf_state { |
| WAIT_ESTABLISH, |
| CCCH_ESTABLISH, |
| PACCH_ESTABLISH, |
| FINISH_ESTABLISH, |
| WAIT_DATA_TRANSFER, |
| DATA_TRANSFER, |
| FINISH_DATA_TRANSFER, |
| RELEASE |
| }; |
| |
| enum gprs_rlcmac_tbf_direction { |
| GPRS_RLCMAC_DL_TBF, |
| GPRS_RLCMAC_UL_TBF |
| }; |
| |
| struct tbf_llc_pdu { |
| struct llist_head list; |
| uint8_t num; |
| uint8_t data[LLC_MAX_LEN]; |
| uint16_t len; |
| }; |
| |
| struct gprs_rlcmac_tbf { |
| struct llist_head list; |
| enum gprs_rlcmac_tbf_state state; |
| enum gprs_rlcmac_tbf_stage stage; |
| enum gprs_rlcmac_tbf_direction direction; |
| struct gprs_rlcmac_tbf *next_tbf; |
| uint8_t tfi; |
| uint32_t tlli; |
| |
| struct llist_head llc_pdus; |
| struct tbf_llc_pdu llc_pdu; |
| uint8_t llc_pdu_list_len; |
| uint8_t rlc_data[LLC_MAX_LEN]; |
| uint16_t data_index; |
| uint8_t bsn; |
| uint8_t trx, ts, tsc; |
| uint16_t arfcn, ta; |
| |
| struct osmo_timer_list timer; |
| unsigned int T; /* Txxxx number */ |
| unsigned int num_T_exp; /* number of consecutive T expirations */ |
| |
| struct osmo_gsm_timer_list gsm_timer; |
| unsigned int fT; /* fTxxxx number */ |
| unsigned int num_fT_exp; /* number of consecutive fT expirations */ |
| }; |
| |
| /* TS 44.060 Section 10.4.7 Table 10.4.7.1: Payload Type field */ |
| enum gprs_rlcmac_block_type { |
| GPRS_RLCMAC_DATA_BLOCK = 0x0, |
| GPRS_RLCMAC_CONTROL_BLOCK = 0x1, |
| GPRS_RLCMAC_CONTROL_BLOCK_OPT = 0x2, |
| GPRS_RLCMAC_RESERVED = 0x3 |
| }; |
| |
| extern struct llist_head gprs_rlcmac_tbfs; |
| |
| int select_pdch(uint8_t *_trx, uint8_t *_ts); |
| |
| int tfi_alloc(); |
| |
| static struct gprs_rlcmac_tbf *tbf_by_tfi(uint8_t tfi, gprs_rlcmac_tbf_direction dir); |
| |
| static struct gprs_rlcmac_tbf *tbf_by_tlli(uint32_t tlli, gprs_rlcmac_tbf_direction dir); |
| |
| static void tbf_free(struct gprs_rlcmac_tbf *tbf); |
| |
| static struct tbf_llc_pdu *tbf_llc_pdu_by_num(struct llist_head llc_pdus, uint8_t num); |
| |
| int tbf_add_llc_pdu(struct gprs_rlcmac_tbf *tbf, uint8_t *data, uint16_t llc_pdu_len); |
| |
| struct gprs_rlcmac_tbf *tbf_alloc(gprs_rlcmac_tbf_direction dir, uint32_t tlli = 0); |
| |
| int tbf_ul_establish(struct gprs_rlcmac_tbf *tbf, uint8_t ra, uint32_t Fn, uint16_t qta); |
| |
| int tbf_dl_establish(struct gprs_rlcmac_tbf *tbf); |
| |
| int tbf_ul_data_transfer(struct gprs_rlcmac_tbf *tbf, RlcMacUplinkDataBlock_t * ul_data_block); |
| |
| int tbf_dl_data_transfer(struct gprs_rlcmac_tbf *tbf, uint8_t *llc_pdu = NULL, uint16_t llc_pdu_len = 0); |
| |
| int tbf_ul_release(struct gprs_rlcmac_tbf *tbf); |
| |
| int tbf_dl_release(struct gprs_rlcmac_tbf *tbf); |
| |
| static void tbf_timer_start(struct gprs_rlcmac_tbf *tbf, unsigned int T, unsigned int seconds); |
| |
| static void tbf_gsm_timer_start(struct gprs_rlcmac_tbf *tbf, unsigned int fT, int frames); |
| |
| int write_immediate_assignment(bitvec * dest, uint8_t downlink, uint8_t ra, uint32_t fn, uint8_t ta, uint16_t arfcn, uint8_t ts, uint8_t tsc, uint8_t tfi, uint32_t tlli = 0); |
| |
| void gprs_rlcmac_tx_ul_ack(uint8_t tfi, uint32_t tlli, uint8_t ti, uint8_t bsn); |
| |
| void gprs_rlcmac_data_block_parse(gprs_rlcmac_tbf* tbf, RlcMacUplinkDataBlock_t * ul_data_block); |
| |
| int gprs_rlcmac_rcv_data_block(bitvec *rlc_block); |
| |
| int gprs_rlcmac_rcv_control_block(bitvec *rlc_block); |
| |
| void gprs_rlcmac_rcv_block(bitvec *rlc_block); |
| |
| void gprs_rlcmac_rcv_rts_block(uint8_t trx, uint8_t ts, uint16_t arfcn, |
| uint32_t fn, uint8_t block_nr); |
| |
| int gprs_rlcmac_rcv_rach(uint8_t ra, uint32_t Fn, int16_t qta); |
| |
| int gprs_rlcmac_tx_llc_pdus(struct gprs_rlcmac_tbf *tbf); |
| |
| void gprs_rlcmac_tx_ul_ud(gprs_rlcmac_tbf *tbf); |
| |
| void gprs_rlcmac_downlink_assignment(gprs_rlcmac_tbf *tbf); |
| |
| void gprs_rlcmac_packet_downlink_assignment(gprs_rlcmac_tbf *tbf); |
| |
| void gprs_rlcmac_paging_request(uint8_t *ptmsi, uint16_t ptmsi_len); |
| #endif // GPRS_RLCMAC_H |