Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 1 | /* rlc header descriptions |
| 2 | * |
| 3 | * Copyright (C) 2012 Ivan Klyuchnikov |
| 4 | * Copyright (C) 2012 Andreas Eversberg <jolly@eversberg.eu> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU General Public License |
| 8 | * as published by the Free Software Foundation; either version 2 |
| 9 | * of the License, or (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with this program; if not, write to the Free Software |
| 18 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 19 | */ |
| 20 | #pragma once |
| 21 | |
Jacob Erlbeck | 4abc686 | 2015-12-08 15:14:05 +0100 | [diff] [blame] | 22 | #include "gprs_coding_scheme.h" |
| 23 | |
Jacob Erlbeck | 4aa78a8 | 2015-12-14 11:13:30 +0100 | [diff] [blame] | 24 | #include <osmocom/core/endian.h> |
| 25 | |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 26 | #include <stdint.h> |
Pau Espin Pedrol | 0b0748a | 2018-05-16 15:20:39 +0200 | [diff] [blame] | 27 | #include <string.h> |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 28 | |
Jacob Erlbeck | 8f8197f | 2015-12-28 13:51:44 +0100 | [diff] [blame] | 29 | #define RLC_GPRS_SNS 128 /* GPRS, must be power of 2 */ |
| 30 | #define RLC_GPRS_WS 64 /* max window size */ |
Jacob Erlbeck | 8f8197f | 2015-12-28 13:51:44 +0100 | [diff] [blame] | 31 | #define RLC_EGPRS_MIN_WS 64 /* min window size */ |
| 32 | #define RLC_EGPRS_MAX_WS 1024 /* min window size */ |
| 33 | #define RLC_EGPRS_SNS 2048 /* EGPRS, must be power of 2 */ |
Jacob Erlbeck | d675249 | 2016-02-02 18:12:46 +0100 | [diff] [blame] | 34 | #define RLC_EGPRS_MAX_BSN_DELTA 512 |
Jacob Erlbeck | 8f8197f | 2015-12-28 13:51:44 +0100 | [diff] [blame] | 35 | #define RLC_MAX_SNS RLC_EGPRS_SNS |
Jacob Erlbeck | eb08f86 | 2016-02-05 17:07:12 +0100 | [diff] [blame] | 36 | #define RLC_MAX_WS RLC_EGPRS_MAX_WS |
Jacob Erlbeck | 8f8197f | 2015-12-28 13:51:44 +0100 | [diff] [blame] | 37 | #define RLC_MAX_LEN 74 /* MCS-9 data unit */ |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 38 | |
Holger Hans Peter Freyther | 35cc1c0 | 2014-07-02 14:48:44 +0200 | [diff] [blame] | 39 | struct BTS; |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 40 | |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 41 | /* The state of a BSN in the send/receive window */ |
| 42 | enum gprs_rlc_ul_bsn_state { |
| 43 | GPRS_RLC_UL_BSN_INVALID, |
| 44 | GPRS_RLC_UL_BSN_RECEIVED, |
| 45 | GPRS_RLC_UL_BSN_MISSING, |
| 46 | GPRS_RLC_UL_BSN_MAX, |
| 47 | }; |
| 48 | |
| 49 | enum gprs_rlc_dl_bsn_state { |
| 50 | GPRS_RLC_DL_BSN_INVALID, |
| 51 | GPRS_RLC_DL_BSN_NACKED, |
| 52 | GPRS_RLC_DL_BSN_ACKED, |
| 53 | GPRS_RLC_DL_BSN_UNACKED, |
| 54 | GPRS_RLC_DL_BSN_RESEND, |
| 55 | GPRS_RLC_DL_BSN_MAX, |
| 56 | }; |
| 57 | |
Aravind Sirsikar | 7a05b03 | 2016-03-23 18:29:45 +0530 | [diff] [blame] | 58 | /* |
Aravind Sirsikar | 36bdc5f | 2016-07-26 17:13:59 +0530 | [diff] [blame] | 59 | * EGPRS resegment status information for UL |
| 60 | * When only first split block is received bsn state |
| 61 | * will be set to EGPRS_RESEG_FIRST_SEG_RXD and when |
| 62 | * only second segment is received the state will be |
| 63 | * set to EGPRS_RESEG_SECOND_SEG_RXD. When both Split |
| 64 | * blocks are received the state will be set to |
| 65 | * EGPRS_RESEG_DEFAULT |
| 66 | * The EGPRS resegmentation feature allows MS to retransmit |
| 67 | * RLC blocks of HeaderType1, HeaderType2 by segmenting |
| 68 | * them to 2 HeaderType3 blocks(Example MCS5 will be |
| 69 | * retransmitted as 2 MCS2 blocks). Table 10.4.8b.1 of 44.060 |
| 70 | * explains the possible values of SPB in HeadrType3 for UL |
| 71 | * direction. When the MCS is changed at the PCU, PCU directs the |
| 72 | * changed MCS to MS by PUAN or UPLINK ASSIGNMENT message along |
| 73 | * with RESEGMENT flag, Then MS may decide to retransmit the |
| 74 | * blocks by resegmenting it based on Table 8.1.1.1 of 44.060. |
| 75 | * The retransmission MCS is calculated based on current MCS of |
| 76 | * the Block and demanded MCS by PCU. Section 10.3a.4.3 of 44.060 |
| 77 | * shows the HeadrType3 with SPB field present in it |
| 78 | */ |
| 79 | enum egprs_rlc_ul_reseg_bsn_state { |
| 80 | EGPRS_RESEG_DEFAULT = 0, |
| 81 | EGPRS_RESEG_FIRST_SEG_RXD = 0x01, |
| 82 | EGPRS_RESEG_SECOND_SEG_RXD = 0x02, |
| 83 | EGPRS_RESEG_INVALID = 0x04 |
| 84 | }; |
| 85 | |
| 86 | /* |
Aravind Sirsikar | e6cadb4 | 2016-08-16 16:32:59 +0530 | [diff] [blame] | 87 | * EGPRS resegment status information for DL |
| 88 | * When only first segment is sent, bsn state |
| 89 | * will be set to EGPRS_RESEG_FIRST_SEG_SENT and when |
| 90 | * second segment is sent the state will be |
| 91 | * set to EGPRS_RESEG_SECOND_SEG_SENT. |
| 92 | * EGPRS_RESEG_DL_INVALID is set to 8 considering there is a scope for |
| 93 | * 3rd segment according to Table 10.4.8b.2 of 44.060 |
| 94 | * The EGPRS resegmentation feature allows PCU to retransmit |
| 95 | * RLC blocks of HeaderType1, HeaderType2 by segmenting |
| 96 | * them to 2 HeaderType3 blocks(Example MCS5 will be |
| 97 | * retransmitted as 2 MCS2 blocks). Table 10.4.8b.2 of 44.060 |
| 98 | * explains the possible values of SPB in HeadrType3 for DL |
| 99 | * direction.The PCU decides to retransmit the |
| 100 | * blocks by resegmenting it based on Table 8.1.1.1 of 44.060. |
| 101 | * The retransmission MCS is calculated based on current MCS of |
| 102 | * the Block and demanded MCS by PCU. Section 10.3a.3.3 of 44.060 |
| 103 | * shows the HeadrType3 with SPB field present in it |
| 104 | */ |
| 105 | enum egprs_rlc_dl_reseg_bsn_state { |
| 106 | EGPRS_RESEG_DL_DEFAULT = 0, |
| 107 | EGPRS_RESEG_FIRST_SEG_SENT = 0x01, |
| 108 | EGPRS_RESEG_SECOND_SEG_SENT = 0x02, |
| 109 | EGPRS_RESEG_DL_INVALID = 0x08 |
| 110 | }; |
| 111 | |
| 112 | /* Table 10.4.8b.2 of 44.060 */ |
| 113 | enum egprs_rlcmac_dl_spb { |
| 114 | EGPRS_RLCMAC_DL_NO_RETX = 0, |
| 115 | EGPRS_RLCMAC_DL_FIRST_SEG = 2, |
| 116 | EGPRS_RLCMAC_DL_SEC_SEG = 3, |
| 117 | }; |
| 118 | |
| 119 | /* |
Aravind Sirsikar | 7a05b03 | 2016-03-23 18:29:45 +0530 | [diff] [blame] | 120 | * Valid puncturing scheme values |
| 121 | * TS 44.060 10.4.8a.3.1, 10.4.8a.2.1, 10.4.8a.1.1 |
| 122 | */ |
| 123 | enum egprs_puncturing_values { |
| 124 | EGPRS_PS_1, |
| 125 | EGPRS_PS_2, |
| 126 | EGPRS_PS_3, |
| 127 | EGPRS_PS_INVALID, |
| 128 | }; |
| 129 | |
| 130 | /* |
| 131 | * EGPRS_MAX_PS_NUM_2 is valid for MCS 1,2,5,6. |
| 132 | * And EGPRS_MAX_PS_NUM_3 is valid for MCS 3,4,7,8,9 |
| 133 | * TS 44.060 10.4.8a.3.1, 10.4.8a.2.1, 10.4.8a.1.1 |
| 134 | */ |
| 135 | enum egprs_puncturing_types { |
| 136 | EGPRS_MAX_PS_NUM_2 = 2, |
| 137 | EGPRS_MAX_PS_NUM_3, |
| 138 | EGPRS_MAX_PS_NUM_INVALID, |
| 139 | }; |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 140 | |
| 141 | static inline uint16_t mod_sns_half() |
| 142 | { |
| 143 | return (RLC_MAX_SNS / 2) - 1; |
| 144 | } |
| 145 | |
Jacob Erlbeck | f2ba4cb | 2016-01-07 18:59:28 +0100 | [diff] [blame] | 146 | struct gprs_rlc_data_block_info { |
Jacob Erlbeck | 4abc686 | 2015-12-08 15:14:05 +0100 | [diff] [blame] | 147 | unsigned int data_len; /* EGPRS: N2, GPRS: N2-2, N-2 */ |
| 148 | unsigned int bsn; |
| 149 | unsigned int ti; |
| 150 | unsigned int e; |
Jacob Erlbeck | cc34a5b | 2016-01-11 12:53:08 +0100 | [diff] [blame] | 151 | unsigned int cv; /* FBI == 1 <=> CV == 0 */ |
Jacob Erlbeck | 4abc686 | 2015-12-08 15:14:05 +0100 | [diff] [blame] | 152 | unsigned int pi; |
| 153 | unsigned int spb; |
| 154 | }; |
| 155 | |
Jacob Erlbeck | f2ba4cb | 2016-01-07 18:59:28 +0100 | [diff] [blame] | 156 | struct gprs_rlc_data_info { |
Jacob Erlbeck | 4abc686 | 2015-12-08 15:14:05 +0100 | [diff] [blame] | 157 | GprsCodingScheme cs; |
| 158 | unsigned int r; |
| 159 | unsigned int si; |
| 160 | unsigned int tfi; |
| 161 | unsigned int cps; |
| 162 | unsigned int rsb; |
Jacob Erlbeck | cc34a5b | 2016-01-11 12:53:08 +0100 | [diff] [blame] | 163 | unsigned int usf; |
| 164 | unsigned int es_p; |
| 165 | unsigned int rrbp; |
| 166 | unsigned int pr; |
Max | b3a17d6 | 2017-12-21 12:11:33 +0100 | [diff] [blame] | 167 | uint8_t num_data_blocks; /* this can actually be only 0, 1, 2: enforced in gprs_rlc_data_header_init() */ |
Jacob Erlbeck | b55f313 | 2016-02-03 18:28:04 +0100 | [diff] [blame] | 168 | unsigned int with_padding; |
Jacob Erlbeck | 4abc686 | 2015-12-08 15:14:05 +0100 | [diff] [blame] | 169 | unsigned int data_offs_bits[2]; |
Jacob Erlbeck | f2ba4cb | 2016-01-07 18:59:28 +0100 | [diff] [blame] | 170 | struct gprs_rlc_data_block_info block_info[2]; |
Jacob Erlbeck | 4abc686 | 2015-12-08 15:14:05 +0100 | [diff] [blame] | 171 | }; |
| 172 | |
Aravind Sirsikar | 36bdc5f | 2016-07-26 17:13:59 +0530 | [diff] [blame] | 173 | /* holds the current status of the block w.r.t UL/DL split blocks */ |
| 174 | union split_block_status { |
| 175 | egprs_rlc_ul_reseg_bsn_state block_status_ul; |
Aravind Sirsikar | e6cadb4 | 2016-08-16 16:32:59 +0530 | [diff] [blame] | 176 | egprs_rlc_dl_reseg_bsn_state block_status_dl; |
Aravind Sirsikar | 36bdc5f | 2016-07-26 17:13:59 +0530 | [diff] [blame] | 177 | }; |
| 178 | |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 179 | struct gprs_rlc_data { |
| 180 | uint8_t *prepare(size_t block_data_length); |
Holger Hans Peter Freyther | 423dd22 | 2013-11-25 23:24:29 +0100 | [diff] [blame] | 181 | void put_data(const uint8_t *data, size_t len); |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 182 | |
Alexander Couzens | 68e2c63 | 2016-05-30 19:53:13 +0200 | [diff] [blame] | 183 | /* block data including LI headers */ |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 184 | uint8_t block[RLC_MAX_LEN]; |
Alexander Couzens | 68e2c63 | 2016-05-30 19:53:13 +0200 | [diff] [blame] | 185 | /* block data len including LI headers*/ |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 186 | uint8_t len; |
Jacob Erlbeck | 1751c62 | 2015-06-04 12:12:32 +0200 | [diff] [blame] | 187 | |
Jacob Erlbeck | f2ba4cb | 2016-01-07 18:59:28 +0100 | [diff] [blame] | 188 | struct gprs_rlc_data_block_info block_info; |
Aravind Sirsikar | 9149552 | 2016-07-12 14:17:12 +0530 | [diff] [blame] | 189 | /* |
| 190 | * cs_current_trans is variable to hold the cs_last value for |
| 191 | * current transmission. cs_current_trans is same as cs_last during |
| 192 | * transmission case. during retransmission cs_current_trans is |
| 193 | * fetched from egprs_mcs_retx_tbl table based on |
| 194 | * cs and demanded cs.reference is 44.060 Table |
| 195 | * 8.1.1.1 and Table 8.1.1.2 |
| 196 | * For UL. cs_last shall be used everywhere. |
| 197 | */ |
| 198 | GprsCodingScheme cs_current_trans; |
| 199 | GprsCodingScheme cs_last; |
Aravind Sirsikar | 7a05b03 | 2016-03-23 18:29:45 +0530 | [diff] [blame] | 200 | |
Aravind Sirsikar | e6cadb4 | 2016-08-16 16:32:59 +0530 | [diff] [blame] | 201 | /* |
| 202 | * The MCS of initial transmission of a BSN |
| 203 | * This variable is used for split block |
| 204 | * processing in DL |
| 205 | */ |
| 206 | GprsCodingScheme cs_init; |
| 207 | |
Aravind Sirsikar | 7a05b03 | 2016-03-23 18:29:45 +0530 | [diff] [blame] | 208 | /* puncturing scheme value to be used for next transmission*/ |
| 209 | enum egprs_puncturing_values next_ps; |
Aravind Sirsikar | 36bdc5f | 2016-07-26 17:13:59 +0530 | [diff] [blame] | 210 | |
| 211 | /* holds the status of the block w.r.t UL/DL split blocks*/ |
| 212 | union split_block_status spb_status; |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 213 | }; |
| 214 | |
Jacob Erlbeck | 6e9f9c2 | 2016-01-11 11:15:45 +0100 | [diff] [blame] | 215 | void gprs_rlc_data_info_init_dl(struct gprs_rlc_data_info *rlc, |
Aravind Sirsikar | 50b0970 | 2016-08-22 17:21:10 +0530 | [diff] [blame] | 216 | GprsCodingScheme cs, bool with_padding, const unsigned int spb); |
Jacob Erlbeck | 6e9f9c2 | 2016-01-11 11:15:45 +0100 | [diff] [blame] | 217 | void gprs_rlc_data_info_init_ul(struct gprs_rlc_data_info *rlc, |
Jacob Erlbeck | b55f313 | 2016-02-03 18:28:04 +0100 | [diff] [blame] | 218 | GprsCodingScheme cs, bool with_padding); |
Jacob Erlbeck | 6e9f9c2 | 2016-01-11 11:15:45 +0100 | [diff] [blame] | 219 | void gprs_rlc_data_block_info_init(struct gprs_rlc_data_block_info *rdbi, |
Aravind Sirsikar | 50b0970 | 2016-08-22 17:21:10 +0530 | [diff] [blame] | 220 | GprsCodingScheme cs, bool with_padding, const unsigned int spb); |
Aravind Sirsikar | a859a21 | 2016-03-23 18:29:46 +0530 | [diff] [blame] | 221 | unsigned int gprs_rlc_mcs_cps(GprsCodingScheme cs, enum egprs_puncturing_values |
Max | b3a17d6 | 2017-12-21 12:11:33 +0100 | [diff] [blame] | 222 | punct, enum egprs_puncturing_values punct2, bool with_padding); |
Jacob Erlbeck | fbd82e4 | 2016-02-03 18:31:19 +0100 | [diff] [blame] | 223 | void gprs_rlc_mcs_cps_decode(unsigned int cps, GprsCodingScheme cs, |
| 224 | int *punct, int *punct2, int *with_padding); |
Aravind Sirsikar | 7952282 | 2016-03-23 18:29:47 +0530 | [diff] [blame] | 225 | enum egprs_puncturing_values gprs_get_punct_scheme(enum egprs_puncturing_values |
| 226 | punct, const GprsCodingScheme &cs, |
Aravind Sirsikar | 50b0970 | 2016-08-22 17:21:10 +0530 | [diff] [blame] | 227 | const GprsCodingScheme &cs_current_trans, |
| 228 | const enum egprs_rlcmac_dl_spb spb); |
Aravind Sirsikar | 7952282 | 2016-03-23 18:29:47 +0530 | [diff] [blame] | 229 | void gprs_update_punct_scheme(enum egprs_puncturing_values *punct, |
| 230 | const GprsCodingScheme &cs); |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 231 | /* |
| 232 | * I hold the currently transferred blocks and will provide |
| 233 | * the routines to manipulate these arrays. |
| 234 | */ |
| 235 | struct gprs_rlc { |
Pau Espin Pedrol | 0b0748a | 2018-05-16 15:20:39 +0200 | [diff] [blame] | 236 | void init(); |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 237 | gprs_rlc_data *block(int bsn); |
| 238 | gprs_rlc_data m_blocks[RLC_MAX_SNS/2]; |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 239 | }; |
| 240 | |
Daniel Willmann | 146514e | 2013-12-28 18:24:42 +0100 | [diff] [blame] | 241 | /** |
| 242 | * TODO: for GPRS/EDGE maybe make sns a template parameter |
| 243 | * so we create specialized versions... |
| 244 | */ |
| 245 | struct gprs_rlc_v_b { |
| 246 | /* Check for an individual frame */ |
| 247 | bool is_unacked(int bsn) const; |
| 248 | bool is_nacked(int bsn) const; |
| 249 | bool is_acked(int bsn) const; |
| 250 | bool is_resend(int bsn) const; |
| 251 | bool is_invalid(int bsn) const; |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 252 | gprs_rlc_dl_bsn_state get_state(int bsn) const; |
Daniel Willmann | 146514e | 2013-12-28 18:24:42 +0100 | [diff] [blame] | 253 | |
| 254 | /* Mark a RLC frame for something */ |
| 255 | void mark_unacked(int bsn); |
| 256 | void mark_nacked(int bsn); |
| 257 | void mark_acked(int bsn); |
| 258 | void mark_resend(int bsn); |
| 259 | void mark_invalid(int bsn); |
| 260 | |
| 261 | void reset(); |
| 262 | |
| 263 | |
| 264 | private: |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 265 | bool is_state(int bsn, const gprs_rlc_dl_bsn_state state) const; |
| 266 | void mark(int bsn, const gprs_rlc_dl_bsn_state state); |
Daniel Willmann | 146514e | 2013-12-28 18:24:42 +0100 | [diff] [blame] | 267 | |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 268 | gprs_rlc_dl_bsn_state m_v_b[RLC_MAX_SNS/2]; /* acknowledge state array */ |
Daniel Willmann | 146514e | 2013-12-28 18:24:42 +0100 | [diff] [blame] | 269 | }; |
| 270 | |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 271 | |
| 272 | /** |
Jacob Erlbeck | ed2dbf6 | 2015-12-28 19:15:40 +0100 | [diff] [blame] | 273 | * TODO: The UL/DL code could/should share a base class. |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 274 | */ |
Jacob Erlbeck | db88380 | 2016-01-19 14:07:33 +0100 | [diff] [blame] | 275 | class gprs_rlc_window { |
| 276 | public: |
| 277 | gprs_rlc_window(); |
| 278 | |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 279 | const uint16_t mod_sns() const; |
Jacob Erlbeck | 93c55d0 | 2015-12-23 16:29:07 +0100 | [diff] [blame] | 280 | const uint16_t mod_sns(uint16_t bsn) const; |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 281 | const uint16_t sns() const; |
| 282 | const uint16_t ws() const; |
| 283 | |
Jacob Erlbeck | db88380 | 2016-01-19 14:07:33 +0100 | [diff] [blame] | 284 | void set_sns(uint16_t sns); |
| 285 | void set_ws(uint16_t ws); |
| 286 | |
| 287 | protected: |
| 288 | uint16_t m_sns; |
| 289 | uint16_t m_ws; |
| 290 | }; |
| 291 | |
| 292 | struct gprs_rlc_dl_window: public gprs_rlc_window { |
| 293 | void reset(); |
| 294 | |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 295 | bool window_stalled() const; |
| 296 | bool window_empty() const; |
| 297 | |
| 298 | void increment_send(); |
| 299 | void raise(int moves); |
| 300 | |
| 301 | const uint16_t v_s() const; |
| 302 | const uint16_t v_s_mod(int offset) const; |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 303 | const uint16_t v_a() const; |
aravind sirsikar | 9434e52 | 2016-11-02 15:41:48 +0530 | [diff] [blame] | 304 | const uint16_t distance() const; |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 305 | |
Daniel Willmann | 146514e | 2013-12-28 18:24:42 +0100 | [diff] [blame] | 306 | /* Methods to manage reception */ |
Max | ead08aa | 2017-12-13 18:25:36 +0100 | [diff] [blame] | 307 | int resend_needed() const; |
Daniel Willmann | 146514e | 2013-12-28 18:24:42 +0100 | [diff] [blame] | 308 | int mark_for_resend(); |
Jacob Erlbeck | e1ca87f | 2015-12-23 16:40:56 +0100 | [diff] [blame] | 309 | void update(BTS *bts, char *show_rbb, uint16_t ssn, |
Daniel Willmann | 146514e | 2013-12-28 18:24:42 +0100 | [diff] [blame] | 310 | uint16_t *lost, uint16_t *received); |
Jacob Erlbeck | eb08f86 | 2016-02-05 17:07:12 +0100 | [diff] [blame] | 311 | void update(BTS *bts, const struct bitvec *rbb, |
| 312 | uint16_t first_bsn, uint16_t *lost, |
| 313 | uint16_t *received); |
Daniel Willmann | 146514e | 2013-12-28 18:24:42 +0100 | [diff] [blame] | 314 | int move_window(); |
Daniel Willmann | 3ce011f | 2014-01-15 12:45:56 +0100 | [diff] [blame] | 315 | void show_state(char *show_rbb); |
Daniel Willmann | 146514e | 2013-12-28 18:24:42 +0100 | [diff] [blame] | 316 | int count_unacked(); |
| 317 | |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 318 | uint16_t m_v_s; /* send state */ |
| 319 | uint16_t m_v_a; /* ack state */ |
Daniel Willmann | 146514e | 2013-12-28 18:24:42 +0100 | [diff] [blame] | 320 | |
| 321 | gprs_rlc_v_b m_v_b; |
Jacob Erlbeck | a3a567e | 2015-12-28 13:46:32 +0100 | [diff] [blame] | 322 | |
| 323 | gprs_rlc_dl_window(); |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 324 | }; |
| 325 | |
Daniel Willmann | 7c3751b | 2013-12-28 13:59:24 +0100 | [diff] [blame] | 326 | struct gprs_rlc_v_n { |
| 327 | void reset(); |
| 328 | |
| 329 | void mark_received(int bsn); |
| 330 | void mark_missing(int bsn); |
| 331 | |
| 332 | bool is_received(int bsn) const; |
| 333 | |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 334 | gprs_rlc_ul_bsn_state state(int bsn) const; |
Daniel Willmann | 7c3751b | 2013-12-28 13:59:24 +0100 | [diff] [blame] | 335 | private: |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 336 | bool is_state(int bsn, const gprs_rlc_ul_bsn_state state) const; |
| 337 | void mark(int bsn, const gprs_rlc_ul_bsn_state state); |
| 338 | gprs_rlc_ul_bsn_state m_v_n[RLC_MAX_SNS/2]; /* receive state array */ |
Daniel Willmann | 7c3751b | 2013-12-28 13:59:24 +0100 | [diff] [blame] | 339 | }; |
| 340 | |
Jacob Erlbeck | db88380 | 2016-01-19 14:07:33 +0100 | [diff] [blame] | 341 | struct gprs_rlc_ul_window: public gprs_rlc_window { |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 342 | const uint16_t v_r() const; |
| 343 | const uint16_t v_q() const; |
| 344 | |
sivasankari | 1d8744c | 2017-01-24 15:53:35 +0530 | [diff] [blame] | 345 | const void set_v_r(int); |
| 346 | const void set_v_q(int); |
Max | 2617bf2 | 2017-12-15 11:08:58 +0100 | [diff] [blame] | 347 | void reset_state(); |
sivasankari | 1d8744c | 2017-01-24 15:53:35 +0530 | [diff] [blame] | 348 | |
Daniel Willmann | 8a31f9e | 2013-11-27 17:08:35 +0100 | [diff] [blame] | 349 | const uint16_t ssn() const; |
| 350 | |
Jacob Erlbeck | e1ca87f | 2015-12-23 16:40:56 +0100 | [diff] [blame] | 351 | bool is_in_window(uint16_t bsn) const; |
| 352 | bool is_received(uint16_t bsn) const; |
Holger Hans Peter Freyther | 6ab5b24 | 2013-11-24 22:43:03 +0100 | [diff] [blame] | 353 | |
Daniel Willmann | 7c3751b | 2013-12-28 13:59:24 +0100 | [diff] [blame] | 354 | void update_rbb(char *rbb); |
sivasankari | 8adfcd0 | 2017-01-16 15:41:21 +0530 | [diff] [blame] | 355 | uint16_t update_egprs_rbb(uint8_t *rbb); |
Daniel Willmann | f4a1ec6 | 2013-12-28 13:57:31 +0100 | [diff] [blame] | 356 | void raise_v_r_to(int moves); |
Daniel Willmann | 7c3751b | 2013-12-28 13:59:24 +0100 | [diff] [blame] | 357 | void raise_v_r(const uint16_t bsn); |
| 358 | uint16_t raise_v_q(); |
Holger Hans Peter Freyther | cbb00eb | 2013-11-25 23:26:06 +0100 | [diff] [blame] | 359 | |
Holger Hans Peter Freyther | 7f3e662 | 2013-11-25 23:51:19 +0100 | [diff] [blame] | 360 | void raise_v_q(int); |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 361 | |
Jacob Erlbeck | d87e1d6 | 2015-12-14 11:43:04 +0100 | [diff] [blame] | 362 | void receive_bsn(const uint16_t bsn); |
Jacob Erlbeck | 784a0bd | 2015-12-14 11:54:29 +0100 | [diff] [blame] | 363 | bool invalidate_bsn(const uint16_t bsn); |
Daniel Willmann | 5584479 | 2013-12-28 14:41:00 +0100 | [diff] [blame] | 364 | |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 365 | uint16_t m_v_r; /* receive state */ |
| 366 | uint16_t m_v_q; /* receive window state */ |
Daniel Willmann | 7c3751b | 2013-12-28 13:59:24 +0100 | [diff] [blame] | 367 | |
| 368 | gprs_rlc_v_n m_v_n; |
Jacob Erlbeck | a3a567e | 2015-12-28 13:46:32 +0100 | [diff] [blame] | 369 | |
| 370 | gprs_rlc_ul_window(); |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 371 | }; |
| 372 | |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 373 | extern "C" { |
| 374 | /* TS 04.60 10.2.2 */ |
Jacob Erlbeck | 4aa78a8 | 2015-12-14 11:13:30 +0100 | [diff] [blame] | 375 | #if OSMO_IS_LITTLE_ENDIAN |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 376 | struct rlc_ul_header { |
| 377 | uint8_t r:1, |
| 378 | si:1, |
| 379 | cv:4, |
| 380 | pt:2; |
| 381 | uint8_t ti:1, |
| 382 | tfi:5, |
| 383 | pi:1, |
| 384 | spare:1; |
| 385 | uint8_t e:1, |
| 386 | bsn:7; |
| 387 | } __attribute__ ((packed)); |
| 388 | |
| 389 | struct rlc_dl_header { |
| 390 | uint8_t usf:3, |
| 391 | s_p:1, |
| 392 | rrbp:2, |
| 393 | pt:2; |
| 394 | uint8_t fbi:1, |
| 395 | tfi:5, |
| 396 | pr:2; |
| 397 | uint8_t e:1, |
| 398 | bsn:7; |
| 399 | } __attribute__ ((packed)); |
| 400 | |
| 401 | struct rlc_li_field { |
| 402 | uint8_t e:1, |
| 403 | m:1, |
| 404 | li:6; |
| 405 | } __attribute__ ((packed)); |
Jacob Erlbeck | 4abc686 | 2015-12-08 15:14:05 +0100 | [diff] [blame] | 406 | |
| 407 | struct rlc_li_field_egprs { |
| 408 | uint8_t e:1, |
| 409 | li:7; |
| 410 | } __attribute__ ((packed)); |
Jacob Erlbeck | 4aa78a8 | 2015-12-14 11:13:30 +0100 | [diff] [blame] | 411 | #else |
| 412 | # error "Only little endian headers are supported yet. TODO: add missing structs" |
| 413 | #endif |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 414 | } |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 415 | |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 416 | inline bool gprs_rlc_v_b::is_state(int bsn, const gprs_rlc_dl_bsn_state type) const |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 417 | { |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 418 | return m_v_b[bsn & mod_sns_half()] == type; |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 419 | } |
| 420 | |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 421 | inline void gprs_rlc_v_b::mark(int bsn, const gprs_rlc_dl_bsn_state type) |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 422 | { |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 423 | m_v_b[bsn & mod_sns_half()] = type; |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 424 | } |
| 425 | |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 426 | inline bool gprs_rlc_v_b::is_nacked(int bsn) const |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 427 | { |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 428 | return is_state(bsn, GPRS_RLC_DL_BSN_NACKED); |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 429 | } |
| 430 | |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 431 | inline bool gprs_rlc_v_b::is_acked(int bsn) const |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 432 | { |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 433 | return is_state(bsn, GPRS_RLC_DL_BSN_ACKED); |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 434 | } |
| 435 | |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 436 | inline bool gprs_rlc_v_b::is_unacked(int bsn) const |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 437 | { |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 438 | return is_state(bsn, GPRS_RLC_DL_BSN_UNACKED); |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 439 | } |
| 440 | |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 441 | inline bool gprs_rlc_v_b::is_resend(int bsn) const |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 442 | { |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 443 | return is_state(bsn, GPRS_RLC_DL_BSN_RESEND); |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 444 | } |
| 445 | |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 446 | inline bool gprs_rlc_v_b::is_invalid(int bsn) const |
Holger Hans Peter Freyther | 9525567 | 2013-11-23 16:18:18 +0100 | [diff] [blame] | 447 | { |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 448 | return is_state(bsn, GPRS_RLC_DL_BSN_INVALID); |
Holger Hans Peter Freyther | 9525567 | 2013-11-23 16:18:18 +0100 | [diff] [blame] | 449 | } |
| 450 | |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 451 | inline gprs_rlc_dl_bsn_state gprs_rlc_v_b::get_state(int bsn) const |
Daniel Willmann | 146514e | 2013-12-28 18:24:42 +0100 | [diff] [blame] | 452 | { |
| 453 | return m_v_b[bsn & mod_sns_half()]; |
| 454 | } |
| 455 | |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 456 | inline void gprs_rlc_v_b::mark_resend(int bsn) |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 457 | { |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 458 | return mark(bsn, GPRS_RLC_DL_BSN_RESEND); |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 459 | } |
| 460 | |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 461 | inline void gprs_rlc_v_b::mark_unacked(int bsn) |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 462 | { |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 463 | return mark(bsn, GPRS_RLC_DL_BSN_UNACKED); |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 464 | } |
| 465 | |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 466 | inline void gprs_rlc_v_b::mark_acked(int bsn) |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 467 | { |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 468 | return mark(bsn, GPRS_RLC_DL_BSN_ACKED); |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 469 | } |
| 470 | |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 471 | inline void gprs_rlc_v_b::mark_nacked(int bsn) |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 472 | { |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 473 | return mark(bsn, GPRS_RLC_DL_BSN_NACKED); |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 474 | } |
| 475 | |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 476 | inline void gprs_rlc_v_b::mark_invalid(int bsn) |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 477 | { |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 478 | return mark(bsn, GPRS_RLC_DL_BSN_INVALID); |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 479 | } |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 480 | |
Jacob Erlbeck | db88380 | 2016-01-19 14:07:33 +0100 | [diff] [blame] | 481 | inline gprs_rlc_window::gprs_rlc_window() |
| 482 | : m_sns(RLC_GPRS_SNS) |
Jacob Erlbeck | 8f8197f | 2015-12-28 13:51:44 +0100 | [diff] [blame] | 483 | , m_ws(RLC_GPRS_WS) |
Jacob Erlbeck | a3a567e | 2015-12-28 13:46:32 +0100 | [diff] [blame] | 484 | { |
| 485 | } |
| 486 | |
Jacob Erlbeck | db88380 | 2016-01-19 14:07:33 +0100 | [diff] [blame] | 487 | inline const uint16_t gprs_rlc_window::sns() const |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 488 | { |
Jacob Erlbeck | 8f8197f | 2015-12-28 13:51:44 +0100 | [diff] [blame] | 489 | return m_sns; |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 490 | } |
| 491 | |
Jacob Erlbeck | db88380 | 2016-01-19 14:07:33 +0100 | [diff] [blame] | 492 | inline const uint16_t gprs_rlc_window::ws() const |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 493 | { |
Jacob Erlbeck | 8f8197f | 2015-12-28 13:51:44 +0100 | [diff] [blame] | 494 | return m_ws; |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 495 | } |
| 496 | |
Jacob Erlbeck | db88380 | 2016-01-19 14:07:33 +0100 | [diff] [blame] | 497 | inline const uint16_t gprs_rlc_window::mod_sns() const |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 498 | { |
| 499 | return sns() - 1; |
| 500 | } |
| 501 | |
Jacob Erlbeck | db88380 | 2016-01-19 14:07:33 +0100 | [diff] [blame] | 502 | inline const uint16_t gprs_rlc_window::mod_sns(uint16_t bsn) const |
Jacob Erlbeck | 93c55d0 | 2015-12-23 16:29:07 +0100 | [diff] [blame] | 503 | { |
| 504 | return bsn & mod_sns(); |
| 505 | } |
| 506 | |
Jacob Erlbeck | db88380 | 2016-01-19 14:07:33 +0100 | [diff] [blame] | 507 | inline gprs_rlc_dl_window::gprs_rlc_dl_window() |
| 508 | : m_v_s(0) |
| 509 | , m_v_a(0) |
| 510 | { |
Max | d81b3bf | 2018-01-15 11:28:40 +0100 | [diff] [blame] | 511 | reset(); |
Jacob Erlbeck | db88380 | 2016-01-19 14:07:33 +0100 | [diff] [blame] | 512 | } |
| 513 | |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 514 | inline const uint16_t gprs_rlc_dl_window::v_s() const |
| 515 | { |
| 516 | return m_v_s; |
| 517 | } |
| 518 | |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 519 | inline const uint16_t gprs_rlc_dl_window::v_s_mod(int offset) const |
| 520 | { |
Jacob Erlbeck | 93c55d0 | 2015-12-23 16:29:07 +0100 | [diff] [blame] | 521 | return mod_sns(m_v_s + offset); |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 522 | } |
| 523 | |
| 524 | inline const uint16_t gprs_rlc_dl_window::v_a() const |
| 525 | { |
| 526 | return m_v_a; |
| 527 | } |
| 528 | |
| 529 | inline bool gprs_rlc_dl_window::window_stalled() const |
| 530 | { |
Jacob Erlbeck | 93c55d0 | 2015-12-23 16:29:07 +0100 | [diff] [blame] | 531 | return (mod_sns(m_v_s - m_v_a)) == ws(); |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 532 | } |
| 533 | |
| 534 | inline bool gprs_rlc_dl_window::window_empty() const |
| 535 | { |
| 536 | return m_v_s == m_v_a; |
| 537 | } |
| 538 | |
| 539 | inline void gprs_rlc_dl_window::increment_send() |
| 540 | { |
| 541 | m_v_s = (m_v_s + 1) & mod_sns(); |
| 542 | } |
| 543 | |
| 544 | inline void gprs_rlc_dl_window::raise(int moves) |
| 545 | { |
| 546 | m_v_a = (m_v_a + moves) & mod_sns(); |
| 547 | } |
| 548 | |
aravind sirsikar | 9434e52 | 2016-11-02 15:41:48 +0530 | [diff] [blame] | 549 | inline const uint16_t gprs_rlc_dl_window::distance() const |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 550 | { |
| 551 | return (m_v_s - m_v_a) & mod_sns(); |
| 552 | } |
| 553 | |
Jacob Erlbeck | a3a567e | 2015-12-28 13:46:32 +0100 | [diff] [blame] | 554 | inline gprs_rlc_ul_window::gprs_rlc_ul_window() |
| 555 | : m_v_r(0) |
| 556 | , m_v_q(0) |
| 557 | { |
Max | d81b3bf | 2018-01-15 11:28:40 +0100 | [diff] [blame] | 558 | m_v_n.reset(); |
Jacob Erlbeck | a3a567e | 2015-12-28 13:46:32 +0100 | [diff] [blame] | 559 | } |
| 560 | |
Jacob Erlbeck | e1ca87f | 2015-12-23 16:40:56 +0100 | [diff] [blame] | 561 | inline bool gprs_rlc_ul_window::is_in_window(uint16_t bsn) const |
Holger Hans Peter Freyther | 6ab5b24 | 2013-11-24 22:43:03 +0100 | [diff] [blame] | 562 | { |
| 563 | uint16_t offset_v_q; |
| 564 | |
| 565 | /* current block relative to lowest unreceived block */ |
| 566 | offset_v_q = (bsn - m_v_q) & mod_sns(); |
| 567 | /* If out of window (may happen if blocks below V(Q) are received |
| 568 | * again. */ |
| 569 | return offset_v_q < ws(); |
| 570 | } |
| 571 | |
Jacob Erlbeck | e1ca87f | 2015-12-23 16:40:56 +0100 | [diff] [blame] | 572 | inline bool gprs_rlc_ul_window::is_received(uint16_t bsn) const |
Jacob Erlbeck | 784a0bd | 2015-12-14 11:54:29 +0100 | [diff] [blame] | 573 | { |
| 574 | uint16_t offset_v_r; |
| 575 | |
| 576 | /* Offset to the end of the received window */ |
| 577 | offset_v_r = (m_v_r - 1 - bsn) & mod_sns(); |
| 578 | return is_in_window(bsn) && m_v_n.is_received(bsn) && offset_v_r < ws(); |
| 579 | } |
| 580 | |
Max | 2617bf2 | 2017-12-15 11:08:58 +0100 | [diff] [blame] | 581 | inline void gprs_rlc_ul_window::reset_state() |
| 582 | { |
| 583 | m_v_r = 0; |
| 584 | m_v_q = 0; |
| 585 | } |
| 586 | |
sivasankari | 1d8744c | 2017-01-24 15:53:35 +0530 | [diff] [blame] | 587 | inline const void gprs_rlc_ul_window::set_v_r(int v_r) |
| 588 | { |
| 589 | m_v_r = v_r; |
| 590 | } |
| 591 | |
| 592 | inline const void gprs_rlc_ul_window::set_v_q(int v_q) |
| 593 | { |
| 594 | m_v_q = v_q; |
| 595 | } |
| 596 | |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 597 | inline const uint16_t gprs_rlc_ul_window::v_r() const |
| 598 | { |
| 599 | return m_v_r; |
| 600 | } |
| 601 | |
| 602 | inline const uint16_t gprs_rlc_ul_window::v_q() const |
| 603 | { |
| 604 | return m_v_q; |
| 605 | } |
| 606 | |
Daniel Willmann | 8a31f9e | 2013-11-27 17:08:35 +0100 | [diff] [blame] | 607 | inline const uint16_t gprs_rlc_ul_window::ssn() const |
| 608 | { |
| 609 | return m_v_r; |
| 610 | } |
| 611 | |
Daniel Willmann | f4a1ec6 | 2013-12-28 13:57:31 +0100 | [diff] [blame] | 612 | inline void gprs_rlc_ul_window::raise_v_r_to(int moves) |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 613 | { |
Jacob Erlbeck | 93c55d0 | 2015-12-23 16:29:07 +0100 | [diff] [blame] | 614 | m_v_r = mod_sns(m_v_r + moves); |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 615 | } |
| 616 | |
Holger Hans Peter Freyther | 7f3e662 | 2013-11-25 23:51:19 +0100 | [diff] [blame] | 617 | inline void gprs_rlc_ul_window::raise_v_q(int incr) |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 618 | { |
Jacob Erlbeck | 93c55d0 | 2015-12-23 16:29:07 +0100 | [diff] [blame] | 619 | m_v_q = mod_sns(m_v_q + incr); |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 620 | } |
Holger Hans Peter Freyther | 270f7fc | 2013-11-24 20:55:02 +0100 | [diff] [blame] | 621 | |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 622 | inline void gprs_rlc_v_n::mark_received(int bsn) |
Holger Hans Peter Freyther | 270f7fc | 2013-11-24 20:55:02 +0100 | [diff] [blame] | 623 | { |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 624 | return mark(bsn, GPRS_RLC_UL_BSN_RECEIVED); |
Holger Hans Peter Freyther | 270f7fc | 2013-11-24 20:55:02 +0100 | [diff] [blame] | 625 | } |
| 626 | |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 627 | inline void gprs_rlc_v_n::mark_missing(int bsn) |
Holger Hans Peter Freyther | 270f7fc | 2013-11-24 20:55:02 +0100 | [diff] [blame] | 628 | { |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 629 | return mark(bsn, GPRS_RLC_UL_BSN_MISSING); |
Holger Hans Peter Freyther | 270f7fc | 2013-11-24 20:55:02 +0100 | [diff] [blame] | 630 | } |
| 631 | |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 632 | inline bool gprs_rlc_v_n::is_received(int bsn) const |
Holger Hans Peter Freyther | 270f7fc | 2013-11-24 20:55:02 +0100 | [diff] [blame] | 633 | { |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 634 | return is_state(bsn, GPRS_RLC_UL_BSN_RECEIVED); |
Holger Hans Peter Freyther | 270f7fc | 2013-11-24 20:55:02 +0100 | [diff] [blame] | 635 | } |
| 636 | |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 637 | inline bool gprs_rlc_v_n::is_state(int bsn, gprs_rlc_ul_bsn_state type) const |
Holger Hans Peter Freyther | 270f7fc | 2013-11-24 20:55:02 +0100 | [diff] [blame] | 638 | { |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 639 | return m_v_n[bsn & mod_sns_half()] == type; |
| 640 | } |
| 641 | |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 642 | inline void gprs_rlc_v_n::mark(int bsn, gprs_rlc_ul_bsn_state type) |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 643 | { |
| 644 | m_v_n[bsn & mod_sns_half()] = type; |
| 645 | } |
| 646 | |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 647 | inline gprs_rlc_ul_bsn_state gprs_rlc_v_n::state(int bsn) const |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 648 | { |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 649 | return m_v_n[bsn & mod_sns_half()]; |
Holger Hans Peter Freyther | 270f7fc | 2013-11-24 20:55:02 +0100 | [diff] [blame] | 650 | } |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 651 | |
Pau Espin Pedrol | 0b0748a | 2018-05-16 15:20:39 +0200 | [diff] [blame] | 652 | inline void gprs_rlc::init() |
| 653 | { |
| 654 | memset(m_blocks, 0, sizeof(m_blocks)); |
| 655 | } |
| 656 | |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 657 | inline gprs_rlc_data *gprs_rlc::block(int bsn) |
| 658 | { |
| 659 | return &m_blocks[bsn & mod_sns_half()]; |
| 660 | } |