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> |
| 27 | |
Jacob Erlbeck | 8f8197f | 2015-12-28 13:51:44 +0100 | [diff] [blame] | 28 | #define RLC_GPRS_SNS 128 /* GPRS, must be power of 2 */ |
| 29 | #define RLC_GPRS_WS 64 /* max window size */ |
| 30 | #define RLC_EGPRS_SNS 2048 /* EGPRS, must be power of 2 */ |
| 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 */ |
| 34 | #define RLC_MAX_SNS RLC_EGPRS_SNS |
| 35 | #define RLC_MAX_LEN 74 /* MCS-9 data unit */ |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 36 | |
Holger Hans Peter Freyther | 35cc1c0 | 2014-07-02 14:48:44 +0200 | [diff] [blame] | 37 | struct BTS; |
Holger Hans Peter Freyther | cbb00eb | 2013-11-25 23:26:06 +0100 | [diff] [blame] | 38 | struct gprs_rlc_v_n; |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 39 | |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 40 | /* The state of a BSN in the send/receive window */ |
| 41 | enum gprs_rlc_ul_bsn_state { |
| 42 | GPRS_RLC_UL_BSN_INVALID, |
| 43 | GPRS_RLC_UL_BSN_RECEIVED, |
| 44 | GPRS_RLC_UL_BSN_MISSING, |
| 45 | GPRS_RLC_UL_BSN_MAX, |
| 46 | }; |
| 47 | |
| 48 | enum gprs_rlc_dl_bsn_state { |
| 49 | GPRS_RLC_DL_BSN_INVALID, |
| 50 | GPRS_RLC_DL_BSN_NACKED, |
| 51 | GPRS_RLC_DL_BSN_ACKED, |
| 52 | GPRS_RLC_DL_BSN_UNACKED, |
| 53 | GPRS_RLC_DL_BSN_RESEND, |
| 54 | GPRS_RLC_DL_BSN_MAX, |
| 55 | }; |
| 56 | |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 57 | |
| 58 | static inline uint16_t mod_sns_half() |
| 59 | { |
| 60 | return (RLC_MAX_SNS / 2) - 1; |
| 61 | } |
| 62 | |
Jacob Erlbeck | f2ba4cb | 2016-01-07 18:59:28 +0100 | [diff] [blame^] | 63 | struct gprs_rlc_data_block_info { |
Jacob Erlbeck | 4abc686 | 2015-12-08 15:14:05 +0100 | [diff] [blame] | 64 | unsigned int data_len; /* EGPRS: N2, GPRS: N2-2, N-2 */ |
| 65 | unsigned int bsn; |
| 66 | unsigned int ti; |
| 67 | unsigned int e; |
| 68 | unsigned int cv; |
| 69 | unsigned int pi; |
| 70 | unsigned int spb; |
| 71 | }; |
| 72 | |
Jacob Erlbeck | f2ba4cb | 2016-01-07 18:59:28 +0100 | [diff] [blame^] | 73 | struct gprs_rlc_data_info { |
Jacob Erlbeck | 4abc686 | 2015-12-08 15:14:05 +0100 | [diff] [blame] | 74 | GprsCodingScheme cs; |
| 75 | unsigned int r; |
| 76 | unsigned int si; |
| 77 | unsigned int tfi; |
| 78 | unsigned int cps; |
| 79 | unsigned int rsb; |
| 80 | unsigned int num_data_blocks; |
| 81 | unsigned int data_offs_bits[2]; |
Jacob Erlbeck | f2ba4cb | 2016-01-07 18:59:28 +0100 | [diff] [blame^] | 82 | struct gprs_rlc_data_block_info block_info[2]; |
Jacob Erlbeck | 4abc686 | 2015-12-08 15:14:05 +0100 | [diff] [blame] | 83 | }; |
| 84 | |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 85 | struct gprs_rlc_data { |
| 86 | uint8_t *prepare(size_t block_data_length); |
Holger Hans Peter Freyther | 423dd22 | 2013-11-25 23:24:29 +0100 | [diff] [blame] | 87 | void put_data(const uint8_t *data, size_t len); |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 88 | |
| 89 | /* block history */ |
| 90 | uint8_t block[RLC_MAX_LEN]; |
| 91 | /* block len of history */ |
| 92 | uint8_t len; |
Jacob Erlbeck | 1751c62 | 2015-06-04 12:12:32 +0200 | [diff] [blame] | 93 | |
Jacob Erlbeck | f2ba4cb | 2016-01-07 18:59:28 +0100 | [diff] [blame^] | 94 | struct gprs_rlc_data_block_info block_info; |
Jacob Erlbeck | ce1beb4 | 2015-12-14 12:04:01 +0100 | [diff] [blame] | 95 | GprsCodingScheme cs; |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 96 | }; |
| 97 | |
| 98 | /* |
| 99 | * I hold the currently transferred blocks and will provide |
| 100 | * the routines to manipulate these arrays. |
| 101 | */ |
| 102 | struct gprs_rlc { |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 103 | gprs_rlc_data *block(int bsn); |
| 104 | gprs_rlc_data m_blocks[RLC_MAX_SNS/2]; |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 105 | }; |
| 106 | |
Daniel Willmann | 146514e | 2013-12-28 18:24:42 +0100 | [diff] [blame] | 107 | /** |
| 108 | * TODO: for GPRS/EDGE maybe make sns a template parameter |
| 109 | * so we create specialized versions... |
| 110 | */ |
| 111 | struct gprs_rlc_v_b { |
| 112 | /* Check for an individual frame */ |
| 113 | bool is_unacked(int bsn) const; |
| 114 | bool is_nacked(int bsn) const; |
| 115 | bool is_acked(int bsn) const; |
| 116 | bool is_resend(int bsn) const; |
| 117 | bool is_invalid(int bsn) const; |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 118 | gprs_rlc_dl_bsn_state get_state(int bsn) const; |
Daniel Willmann | 146514e | 2013-12-28 18:24:42 +0100 | [diff] [blame] | 119 | |
| 120 | /* Mark a RLC frame for something */ |
| 121 | void mark_unacked(int bsn); |
| 122 | void mark_nacked(int bsn); |
| 123 | void mark_acked(int bsn); |
| 124 | void mark_resend(int bsn); |
| 125 | void mark_invalid(int bsn); |
| 126 | |
| 127 | void reset(); |
| 128 | |
| 129 | |
| 130 | private: |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 131 | bool is_state(int bsn, const gprs_rlc_dl_bsn_state state) const; |
| 132 | void mark(int bsn, const gprs_rlc_dl_bsn_state state); |
Daniel Willmann | 146514e | 2013-12-28 18:24:42 +0100 | [diff] [blame] | 133 | |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 134 | 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] | 135 | }; |
| 136 | |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 137 | |
| 138 | /** |
Jacob Erlbeck | ed2dbf6 | 2015-12-28 19:15:40 +0100 | [diff] [blame] | 139 | * 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] | 140 | */ |
| 141 | struct gprs_rlc_dl_window { |
Daniel Willmann | 7e994e3 | 2014-08-07 15:49:21 +0200 | [diff] [blame] | 142 | void reset(); |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 143 | const uint16_t mod_sns() const; |
Jacob Erlbeck | 93c55d0 | 2015-12-23 16:29:07 +0100 | [diff] [blame] | 144 | const uint16_t mod_sns(uint16_t bsn) const; |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 145 | const uint16_t sns() const; |
| 146 | const uint16_t ws() const; |
| 147 | |
| 148 | bool window_stalled() const; |
| 149 | bool window_empty() const; |
| 150 | |
| 151 | void increment_send(); |
| 152 | void raise(int moves); |
| 153 | |
| 154 | const uint16_t v_s() const; |
| 155 | const uint16_t v_s_mod(int offset) const; |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 156 | const uint16_t v_a() const; |
| 157 | const int16_t distance() const; |
| 158 | |
Daniel Willmann | 146514e | 2013-12-28 18:24:42 +0100 | [diff] [blame] | 159 | /* Methods to manage reception */ |
| 160 | int resend_needed(); |
| 161 | int mark_for_resend(); |
Jacob Erlbeck | e1ca87f | 2015-12-23 16:40:56 +0100 | [diff] [blame] | 162 | void update(BTS *bts, char *show_rbb, uint16_t ssn, |
Daniel Willmann | 146514e | 2013-12-28 18:24:42 +0100 | [diff] [blame] | 163 | uint16_t *lost, uint16_t *received); |
| 164 | int move_window(); |
Daniel Willmann | 3ce011f | 2014-01-15 12:45:56 +0100 | [diff] [blame] | 165 | void show_state(char *show_rbb); |
Daniel Willmann | 146514e | 2013-12-28 18:24:42 +0100 | [diff] [blame] | 166 | int count_unacked(); |
| 167 | |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 168 | uint16_t m_v_s; /* send state */ |
| 169 | uint16_t m_v_a; /* ack state */ |
Daniel Willmann | 146514e | 2013-12-28 18:24:42 +0100 | [diff] [blame] | 170 | |
| 171 | gprs_rlc_v_b m_v_b; |
Jacob Erlbeck | a3a567e | 2015-12-28 13:46:32 +0100 | [diff] [blame] | 172 | |
Jacob Erlbeck | 8f8197f | 2015-12-28 13:51:44 +0100 | [diff] [blame] | 173 | void set_sns(uint16_t sns); |
| 174 | void set_ws(uint16_t ws); |
| 175 | |
Jacob Erlbeck | a3a567e | 2015-12-28 13:46:32 +0100 | [diff] [blame] | 176 | gprs_rlc_dl_window(); |
Jacob Erlbeck | 8f8197f | 2015-12-28 13:51:44 +0100 | [diff] [blame] | 177 | private: |
| 178 | uint16_t m_sns; |
| 179 | uint16_t m_ws; |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 180 | }; |
| 181 | |
Daniel Willmann | 7c3751b | 2013-12-28 13:59:24 +0100 | [diff] [blame] | 182 | struct gprs_rlc_v_n { |
| 183 | void reset(); |
| 184 | |
| 185 | void mark_received(int bsn); |
| 186 | void mark_missing(int bsn); |
| 187 | |
| 188 | bool is_received(int bsn) const; |
| 189 | |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 190 | gprs_rlc_ul_bsn_state state(int bsn) const; |
Daniel Willmann | 7c3751b | 2013-12-28 13:59:24 +0100 | [diff] [blame] | 191 | private: |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 192 | bool is_state(int bsn, const gprs_rlc_ul_bsn_state state) const; |
| 193 | void mark(int bsn, const gprs_rlc_ul_bsn_state state); |
| 194 | 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] | 195 | }; |
| 196 | |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 197 | struct gprs_rlc_ul_window { |
| 198 | const uint16_t mod_sns() const; |
Jacob Erlbeck | 93c55d0 | 2015-12-23 16:29:07 +0100 | [diff] [blame] | 199 | const uint16_t mod_sns(uint16_t bsn) const; |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 200 | const uint16_t sns() const; |
| 201 | const uint16_t ws() const; |
| 202 | |
| 203 | const uint16_t v_r() const; |
| 204 | const uint16_t v_q() const; |
| 205 | |
Daniel Willmann | 8a31f9e | 2013-11-27 17:08:35 +0100 | [diff] [blame] | 206 | const uint16_t ssn() const; |
| 207 | |
Jacob Erlbeck | e1ca87f | 2015-12-23 16:40:56 +0100 | [diff] [blame] | 208 | bool is_in_window(uint16_t bsn) const; |
| 209 | bool is_received(uint16_t bsn) const; |
Holger Hans Peter Freyther | 6ab5b24 | 2013-11-24 22:43:03 +0100 | [diff] [blame] | 210 | |
Daniel Willmann | 7c3751b | 2013-12-28 13:59:24 +0100 | [diff] [blame] | 211 | void update_rbb(char *rbb); |
Daniel Willmann | f4a1ec6 | 2013-12-28 13:57:31 +0100 | [diff] [blame] | 212 | void raise_v_r_to(int moves); |
Daniel Willmann | 7c3751b | 2013-12-28 13:59:24 +0100 | [diff] [blame] | 213 | void raise_v_r(const uint16_t bsn); |
| 214 | uint16_t raise_v_q(); |
Holger Hans Peter Freyther | cbb00eb | 2013-11-25 23:26:06 +0100 | [diff] [blame] | 215 | |
Holger Hans Peter Freyther | 7f3e662 | 2013-11-25 23:51:19 +0100 | [diff] [blame] | 216 | void raise_v_q(int); |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 217 | |
Jacob Erlbeck | d87e1d6 | 2015-12-14 11:43:04 +0100 | [diff] [blame] | 218 | void receive_bsn(const uint16_t bsn); |
Jacob Erlbeck | 784a0bd | 2015-12-14 11:54:29 +0100 | [diff] [blame] | 219 | bool invalidate_bsn(const uint16_t bsn); |
Daniel Willmann | 5584479 | 2013-12-28 14:41:00 +0100 | [diff] [blame] | 220 | |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 221 | uint16_t m_v_r; /* receive state */ |
| 222 | uint16_t m_v_q; /* receive window state */ |
Daniel Willmann | 7c3751b | 2013-12-28 13:59:24 +0100 | [diff] [blame] | 223 | |
| 224 | gprs_rlc_v_n m_v_n; |
Jacob Erlbeck | a3a567e | 2015-12-28 13:46:32 +0100 | [diff] [blame] | 225 | |
Jacob Erlbeck | 8f8197f | 2015-12-28 13:51:44 +0100 | [diff] [blame] | 226 | void set_sns(uint16_t sns); |
| 227 | void set_ws(uint16_t ws); |
| 228 | |
Jacob Erlbeck | a3a567e | 2015-12-28 13:46:32 +0100 | [diff] [blame] | 229 | gprs_rlc_ul_window(); |
Jacob Erlbeck | 8f8197f | 2015-12-28 13:51:44 +0100 | [diff] [blame] | 230 | private: |
| 231 | uint16_t m_sns; |
| 232 | uint16_t m_ws; |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 233 | }; |
| 234 | |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 235 | extern "C" { |
| 236 | /* TS 04.60 10.2.2 */ |
Jacob Erlbeck | 4aa78a8 | 2015-12-14 11:13:30 +0100 | [diff] [blame] | 237 | #if OSMO_IS_LITTLE_ENDIAN |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 238 | struct rlc_ul_header { |
| 239 | uint8_t r:1, |
| 240 | si:1, |
| 241 | cv:4, |
| 242 | pt:2; |
| 243 | uint8_t ti:1, |
| 244 | tfi:5, |
| 245 | pi:1, |
| 246 | spare:1; |
| 247 | uint8_t e:1, |
| 248 | bsn:7; |
| 249 | } __attribute__ ((packed)); |
| 250 | |
| 251 | struct rlc_dl_header { |
| 252 | uint8_t usf:3, |
| 253 | s_p:1, |
| 254 | rrbp:2, |
| 255 | pt:2; |
| 256 | uint8_t fbi:1, |
| 257 | tfi:5, |
| 258 | pr:2; |
| 259 | uint8_t e:1, |
| 260 | bsn:7; |
| 261 | } __attribute__ ((packed)); |
| 262 | |
| 263 | struct rlc_li_field { |
| 264 | uint8_t e:1, |
| 265 | m:1, |
| 266 | li:6; |
| 267 | } __attribute__ ((packed)); |
Jacob Erlbeck | 4abc686 | 2015-12-08 15:14:05 +0100 | [diff] [blame] | 268 | |
| 269 | struct rlc_li_field_egprs { |
| 270 | uint8_t e:1, |
| 271 | li:7; |
| 272 | } __attribute__ ((packed)); |
| 273 | |
| 274 | struct gprs_rlc_ul_header_egprs_3 { |
| 275 | uint8_t r:1, |
| 276 | si:1, |
| 277 | cv:4, |
| 278 | tfi_a:2; |
| 279 | uint8_t tfi_b:3, |
| 280 | bsn1_a:5; |
| 281 | uint8_t bsn1_b:6, |
| 282 | cps_a:2; |
| 283 | uint8_t cps_b:2, |
| 284 | spb:2, |
| 285 | rsb:1, |
| 286 | pi:1, |
| 287 | spare:1, |
| 288 | dummy:1; |
| 289 | } __attribute__ ((packed)); |
Jacob Erlbeck | 4aa78a8 | 2015-12-14 11:13:30 +0100 | [diff] [blame] | 290 | #else |
| 291 | # error "Only little endian headers are supported yet. TODO: add missing structs" |
| 292 | #endif |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 293 | } |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 294 | |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 295 | 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] | 296 | { |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 297 | return m_v_b[bsn & mod_sns_half()] == type; |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 298 | } |
| 299 | |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 300 | 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] | 301 | { |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 302 | m_v_b[bsn & mod_sns_half()] = type; |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 303 | } |
| 304 | |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 305 | 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] | 306 | { |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 307 | return is_state(bsn, GPRS_RLC_DL_BSN_NACKED); |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 308 | } |
| 309 | |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 310 | 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] | 311 | { |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 312 | return is_state(bsn, GPRS_RLC_DL_BSN_ACKED); |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 313 | } |
| 314 | |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 315 | 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] | 316 | { |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 317 | return is_state(bsn, GPRS_RLC_DL_BSN_UNACKED); |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 318 | } |
| 319 | |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 320 | 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] | 321 | { |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 322 | return is_state(bsn, GPRS_RLC_DL_BSN_RESEND); |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 323 | } |
| 324 | |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 325 | 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] | 326 | { |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 327 | return is_state(bsn, GPRS_RLC_DL_BSN_INVALID); |
Holger Hans Peter Freyther | 9525567 | 2013-11-23 16:18:18 +0100 | [diff] [blame] | 328 | } |
| 329 | |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 330 | 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] | 331 | { |
| 332 | return m_v_b[bsn & mod_sns_half()]; |
| 333 | } |
| 334 | |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 335 | inline void gprs_rlc_v_b::mark_resend(int bsn) |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 336 | { |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 337 | return mark(bsn, GPRS_RLC_DL_BSN_RESEND); |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 338 | } |
| 339 | |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 340 | inline void gprs_rlc_v_b::mark_unacked(int bsn) |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 341 | { |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 342 | return mark(bsn, GPRS_RLC_DL_BSN_UNACKED); |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 343 | } |
| 344 | |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 345 | inline void gprs_rlc_v_b::mark_acked(int bsn) |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 346 | { |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 347 | return mark(bsn, GPRS_RLC_DL_BSN_ACKED); |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 348 | } |
| 349 | |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 350 | inline void gprs_rlc_v_b::mark_nacked(int bsn) |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 351 | { |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 352 | return mark(bsn, GPRS_RLC_DL_BSN_NACKED); |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 353 | } |
| 354 | |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 355 | inline void gprs_rlc_v_b::mark_invalid(int bsn) |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 356 | { |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 357 | return mark(bsn, GPRS_RLC_DL_BSN_INVALID); |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 358 | } |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 359 | |
Jacob Erlbeck | a3a567e | 2015-12-28 13:46:32 +0100 | [diff] [blame] | 360 | inline gprs_rlc_dl_window::gprs_rlc_dl_window() |
| 361 | : m_v_s(0) |
| 362 | , m_v_a(0) |
Jacob Erlbeck | 8f8197f | 2015-12-28 13:51:44 +0100 | [diff] [blame] | 363 | , m_sns(RLC_GPRS_SNS) |
| 364 | , m_ws(RLC_GPRS_WS) |
Jacob Erlbeck | a3a567e | 2015-12-28 13:46:32 +0100 | [diff] [blame] | 365 | { |
| 366 | } |
| 367 | |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 368 | inline const uint16_t gprs_rlc_dl_window::sns() const |
| 369 | { |
Jacob Erlbeck | 8f8197f | 2015-12-28 13:51:44 +0100 | [diff] [blame] | 370 | return m_sns; |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 371 | } |
| 372 | |
| 373 | inline const uint16_t gprs_rlc_dl_window::ws() const |
| 374 | { |
Jacob Erlbeck | 8f8197f | 2015-12-28 13:51:44 +0100 | [diff] [blame] | 375 | return m_ws; |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 376 | } |
| 377 | |
| 378 | inline const uint16_t gprs_rlc_dl_window::mod_sns() const |
| 379 | { |
| 380 | return sns() - 1; |
| 381 | } |
| 382 | |
Jacob Erlbeck | 93c55d0 | 2015-12-23 16:29:07 +0100 | [diff] [blame] | 383 | inline const uint16_t gprs_rlc_dl_window::mod_sns(uint16_t bsn) const |
| 384 | { |
| 385 | return bsn & mod_sns(); |
| 386 | } |
| 387 | |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 388 | inline const uint16_t gprs_rlc_dl_window::v_s() const |
| 389 | { |
| 390 | return m_v_s; |
| 391 | } |
| 392 | |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 393 | inline const uint16_t gprs_rlc_dl_window::v_s_mod(int offset) const |
| 394 | { |
Jacob Erlbeck | 93c55d0 | 2015-12-23 16:29:07 +0100 | [diff] [blame] | 395 | return mod_sns(m_v_s + offset); |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 396 | } |
| 397 | |
| 398 | inline const uint16_t gprs_rlc_dl_window::v_a() const |
| 399 | { |
| 400 | return m_v_a; |
| 401 | } |
| 402 | |
| 403 | inline bool gprs_rlc_dl_window::window_stalled() const |
| 404 | { |
Jacob Erlbeck | 93c55d0 | 2015-12-23 16:29:07 +0100 | [diff] [blame] | 405 | return (mod_sns(m_v_s - m_v_a)) == ws(); |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 406 | } |
| 407 | |
| 408 | inline bool gprs_rlc_dl_window::window_empty() const |
| 409 | { |
| 410 | return m_v_s == m_v_a; |
| 411 | } |
| 412 | |
| 413 | inline void gprs_rlc_dl_window::increment_send() |
| 414 | { |
| 415 | m_v_s = (m_v_s + 1) & mod_sns(); |
| 416 | } |
| 417 | |
| 418 | inline void gprs_rlc_dl_window::raise(int moves) |
| 419 | { |
| 420 | m_v_a = (m_v_a + moves) & mod_sns(); |
| 421 | } |
| 422 | |
| 423 | inline const int16_t gprs_rlc_dl_window::distance() const |
| 424 | { |
| 425 | return (m_v_s - m_v_a) & mod_sns(); |
| 426 | } |
| 427 | |
Jacob Erlbeck | a3a567e | 2015-12-28 13:46:32 +0100 | [diff] [blame] | 428 | inline gprs_rlc_ul_window::gprs_rlc_ul_window() |
| 429 | : m_v_r(0) |
| 430 | , m_v_q(0) |
Jacob Erlbeck | 8f8197f | 2015-12-28 13:51:44 +0100 | [diff] [blame] | 431 | , m_sns(RLC_GPRS_SNS) |
| 432 | , m_ws(RLC_GPRS_WS) |
Jacob Erlbeck | a3a567e | 2015-12-28 13:46:32 +0100 | [diff] [blame] | 433 | { |
| 434 | } |
| 435 | |
Jacob Erlbeck | e1ca87f | 2015-12-23 16:40:56 +0100 | [diff] [blame] | 436 | 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] | 437 | { |
| 438 | uint16_t offset_v_q; |
| 439 | |
| 440 | /* current block relative to lowest unreceived block */ |
| 441 | offset_v_q = (bsn - m_v_q) & mod_sns(); |
| 442 | /* If out of window (may happen if blocks below V(Q) are received |
| 443 | * again. */ |
| 444 | return offset_v_q < ws(); |
| 445 | } |
| 446 | |
Jacob Erlbeck | e1ca87f | 2015-12-23 16:40:56 +0100 | [diff] [blame] | 447 | inline bool gprs_rlc_ul_window::is_received(uint16_t bsn) const |
Jacob Erlbeck | 784a0bd | 2015-12-14 11:54:29 +0100 | [diff] [blame] | 448 | { |
| 449 | uint16_t offset_v_r; |
| 450 | |
| 451 | /* Offset to the end of the received window */ |
| 452 | offset_v_r = (m_v_r - 1 - bsn) & mod_sns(); |
| 453 | return is_in_window(bsn) && m_v_n.is_received(bsn) && offset_v_r < ws(); |
| 454 | } |
| 455 | |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 456 | inline const uint16_t gprs_rlc_ul_window::sns() const |
| 457 | { |
Jacob Erlbeck | 8f8197f | 2015-12-28 13:51:44 +0100 | [diff] [blame] | 458 | return m_sns; |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 459 | } |
| 460 | |
| 461 | inline const uint16_t gprs_rlc_ul_window::ws() const |
| 462 | { |
Jacob Erlbeck | 8f8197f | 2015-12-28 13:51:44 +0100 | [diff] [blame] | 463 | return m_ws; |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 464 | } |
| 465 | |
| 466 | inline const uint16_t gprs_rlc_ul_window::mod_sns() const |
| 467 | { |
| 468 | return sns() - 1; |
| 469 | } |
| 470 | |
Jacob Erlbeck | 93c55d0 | 2015-12-23 16:29:07 +0100 | [diff] [blame] | 471 | inline const uint16_t gprs_rlc_ul_window::mod_sns(uint16_t bsn) const |
| 472 | { |
| 473 | return bsn & mod_sns(); |
| 474 | } |
| 475 | |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 476 | inline const uint16_t gprs_rlc_ul_window::v_r() const |
| 477 | { |
| 478 | return m_v_r; |
| 479 | } |
| 480 | |
| 481 | inline const uint16_t gprs_rlc_ul_window::v_q() const |
| 482 | { |
| 483 | return m_v_q; |
| 484 | } |
| 485 | |
Daniel Willmann | 8a31f9e | 2013-11-27 17:08:35 +0100 | [diff] [blame] | 486 | inline const uint16_t gprs_rlc_ul_window::ssn() const |
| 487 | { |
| 488 | return m_v_r; |
| 489 | } |
| 490 | |
Daniel Willmann | f4a1ec6 | 2013-12-28 13:57:31 +0100 | [diff] [blame] | 491 | 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] | 492 | { |
Jacob Erlbeck | 93c55d0 | 2015-12-23 16:29:07 +0100 | [diff] [blame] | 493 | m_v_r = mod_sns(m_v_r + moves); |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 494 | } |
| 495 | |
Holger Hans Peter Freyther | 7f3e662 | 2013-11-25 23:51:19 +0100 | [diff] [blame] | 496 | 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] | 497 | { |
Jacob Erlbeck | 93c55d0 | 2015-12-23 16:29:07 +0100 | [diff] [blame] | 498 | m_v_q = mod_sns(m_v_q + incr); |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 499 | } |
Holger Hans Peter Freyther | 270f7fc | 2013-11-24 20:55:02 +0100 | [diff] [blame] | 500 | |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 501 | inline void gprs_rlc_v_n::mark_received(int bsn) |
Holger Hans Peter Freyther | 270f7fc | 2013-11-24 20:55:02 +0100 | [diff] [blame] | 502 | { |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 503 | return mark(bsn, GPRS_RLC_UL_BSN_RECEIVED); |
Holger Hans Peter Freyther | 270f7fc | 2013-11-24 20:55:02 +0100 | [diff] [blame] | 504 | } |
| 505 | |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 506 | inline void gprs_rlc_v_n::mark_missing(int bsn) |
Holger Hans Peter Freyther | 270f7fc | 2013-11-24 20:55:02 +0100 | [diff] [blame] | 507 | { |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 508 | return mark(bsn, GPRS_RLC_UL_BSN_MISSING); |
Holger Hans Peter Freyther | 270f7fc | 2013-11-24 20:55:02 +0100 | [diff] [blame] | 509 | } |
| 510 | |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 511 | 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] | 512 | { |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 513 | return is_state(bsn, GPRS_RLC_UL_BSN_RECEIVED); |
Holger Hans Peter Freyther | 270f7fc | 2013-11-24 20:55:02 +0100 | [diff] [blame] | 514 | } |
| 515 | |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 516 | 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] | 517 | { |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 518 | return m_v_n[bsn & mod_sns_half()] == type; |
| 519 | } |
| 520 | |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 521 | 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] | 522 | { |
| 523 | m_v_n[bsn & mod_sns_half()] = type; |
| 524 | } |
| 525 | |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 526 | 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] | 527 | { |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 528 | return m_v_n[bsn & mod_sns_half()]; |
Holger Hans Peter Freyther | 270f7fc | 2013-11-24 20:55:02 +0100 | [diff] [blame] | 529 | } |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 530 | |
| 531 | inline gprs_rlc_data *gprs_rlc::block(int bsn) |
| 532 | { |
| 533 | return &m_blocks[bsn & mod_sns_half()]; |
| 534 | } |