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 | 4abc686 | 2015-12-08 15:14:05 +0100 | [diff] [blame] | 63 | struct gprs_rlc_ul_data_block_info { |
| 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 | |
| 73 | struct gprs_rlc_ul_header_egprs { |
| 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]; |
| 82 | struct gprs_rlc_ul_data_block_info block_info[2]; |
| 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 | b3100e1 | 2015-12-14 13:36:13 +0100 | [diff] [blame] | 94 | struct gprs_rlc_ul_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 | /** |
| 139 | * TODO: The UL/DL code could/should share a baseclass but |
| 140 | * we are using llist_for_each_entry for the TBF which |
| 141 | * requires everything which creates a requirement for a POD |
| 142 | * type and in < C++11 something that is using even if the |
| 143 | * most simple form of inheritance is not a POD anymore. |
| 144 | */ |
| 145 | struct gprs_rlc_dl_window { |
Daniel Willmann | 7e994e3 | 2014-08-07 15:49:21 +0200 | [diff] [blame] | 146 | void reset(); |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 147 | const uint16_t mod_sns() const; |
Jacob Erlbeck | 93c55d0 | 2015-12-23 16:29:07 +0100 | [diff] [blame] | 148 | const uint16_t mod_sns(uint16_t bsn) const; |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 149 | const uint16_t sns() const; |
| 150 | const uint16_t ws() const; |
| 151 | |
| 152 | bool window_stalled() const; |
| 153 | bool window_empty() const; |
| 154 | |
| 155 | void increment_send(); |
| 156 | void raise(int moves); |
| 157 | |
| 158 | const uint16_t v_s() const; |
| 159 | const uint16_t v_s_mod(int offset) const; |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 160 | const uint16_t v_a() const; |
| 161 | const int16_t distance() const; |
| 162 | |
Daniel Willmann | 146514e | 2013-12-28 18:24:42 +0100 | [diff] [blame] | 163 | /* Methods to manage reception */ |
| 164 | int resend_needed(); |
| 165 | int mark_for_resend(); |
Jacob Erlbeck | e1ca87f | 2015-12-23 16:40:56 +0100 | [diff] [blame] | 166 | void update(BTS *bts, char *show_rbb, uint16_t ssn, |
Daniel Willmann | 146514e | 2013-12-28 18:24:42 +0100 | [diff] [blame] | 167 | uint16_t *lost, uint16_t *received); |
| 168 | int move_window(); |
Daniel Willmann | 3ce011f | 2014-01-15 12:45:56 +0100 | [diff] [blame] | 169 | void show_state(char *show_rbb); |
Daniel Willmann | 146514e | 2013-12-28 18:24:42 +0100 | [diff] [blame] | 170 | int count_unacked(); |
| 171 | |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 172 | uint16_t m_v_s; /* send state */ |
| 173 | uint16_t m_v_a; /* ack state */ |
Daniel Willmann | 146514e | 2013-12-28 18:24:42 +0100 | [diff] [blame] | 174 | |
| 175 | gprs_rlc_v_b m_v_b; |
Jacob Erlbeck | a3a567e | 2015-12-28 13:46:32 +0100 | [diff] [blame] | 176 | |
Jacob Erlbeck | 8f8197f | 2015-12-28 13:51:44 +0100 | [diff] [blame^] | 177 | void set_sns(uint16_t sns); |
| 178 | void set_ws(uint16_t ws); |
| 179 | |
Jacob Erlbeck | a3a567e | 2015-12-28 13:46:32 +0100 | [diff] [blame] | 180 | gprs_rlc_dl_window(); |
Jacob Erlbeck | 8f8197f | 2015-12-28 13:51:44 +0100 | [diff] [blame^] | 181 | private: |
| 182 | uint16_t m_sns; |
| 183 | uint16_t m_ws; |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 184 | }; |
| 185 | |
Daniel Willmann | 7c3751b | 2013-12-28 13:59:24 +0100 | [diff] [blame] | 186 | struct gprs_rlc_v_n { |
| 187 | void reset(); |
| 188 | |
| 189 | void mark_received(int bsn); |
| 190 | void mark_missing(int bsn); |
| 191 | |
| 192 | bool is_received(int bsn) const; |
| 193 | |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 194 | gprs_rlc_ul_bsn_state state(int bsn) const; |
Daniel Willmann | 7c3751b | 2013-12-28 13:59:24 +0100 | [diff] [blame] | 195 | private: |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 196 | bool is_state(int bsn, const gprs_rlc_ul_bsn_state state) const; |
| 197 | void mark(int bsn, const gprs_rlc_ul_bsn_state state); |
| 198 | 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] | 199 | }; |
| 200 | |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 201 | struct gprs_rlc_ul_window { |
| 202 | const uint16_t mod_sns() const; |
Jacob Erlbeck | 93c55d0 | 2015-12-23 16:29:07 +0100 | [diff] [blame] | 203 | const uint16_t mod_sns(uint16_t bsn) const; |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 204 | const uint16_t sns() const; |
| 205 | const uint16_t ws() const; |
| 206 | |
| 207 | const uint16_t v_r() const; |
| 208 | const uint16_t v_q() const; |
| 209 | |
Daniel Willmann | 8a31f9e | 2013-11-27 17:08:35 +0100 | [diff] [blame] | 210 | const uint16_t ssn() const; |
| 211 | |
Jacob Erlbeck | e1ca87f | 2015-12-23 16:40:56 +0100 | [diff] [blame] | 212 | bool is_in_window(uint16_t bsn) const; |
| 213 | bool is_received(uint16_t bsn) const; |
Holger Hans Peter Freyther | 6ab5b24 | 2013-11-24 22:43:03 +0100 | [diff] [blame] | 214 | |
Daniel Willmann | 7c3751b | 2013-12-28 13:59:24 +0100 | [diff] [blame] | 215 | void update_rbb(char *rbb); |
Daniel Willmann | f4a1ec6 | 2013-12-28 13:57:31 +0100 | [diff] [blame] | 216 | void raise_v_r_to(int moves); |
Daniel Willmann | 7c3751b | 2013-12-28 13:59:24 +0100 | [diff] [blame] | 217 | void raise_v_r(const uint16_t bsn); |
| 218 | uint16_t raise_v_q(); |
Holger Hans Peter Freyther | cbb00eb | 2013-11-25 23:26:06 +0100 | [diff] [blame] | 219 | |
Holger Hans Peter Freyther | 7f3e662 | 2013-11-25 23:51:19 +0100 | [diff] [blame] | 220 | void raise_v_q(int); |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 221 | |
Jacob Erlbeck | d87e1d6 | 2015-12-14 11:43:04 +0100 | [diff] [blame] | 222 | void receive_bsn(const uint16_t bsn); |
Jacob Erlbeck | 784a0bd | 2015-12-14 11:54:29 +0100 | [diff] [blame] | 223 | bool invalidate_bsn(const uint16_t bsn); |
Daniel Willmann | 5584479 | 2013-12-28 14:41:00 +0100 | [diff] [blame] | 224 | |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 225 | uint16_t m_v_r; /* receive state */ |
| 226 | uint16_t m_v_q; /* receive window state */ |
Daniel Willmann | 7c3751b | 2013-12-28 13:59:24 +0100 | [diff] [blame] | 227 | |
| 228 | gprs_rlc_v_n m_v_n; |
Jacob Erlbeck | a3a567e | 2015-12-28 13:46:32 +0100 | [diff] [blame] | 229 | |
Jacob Erlbeck | 8f8197f | 2015-12-28 13:51:44 +0100 | [diff] [blame^] | 230 | void set_sns(uint16_t sns); |
| 231 | void set_ws(uint16_t ws); |
| 232 | |
Jacob Erlbeck | a3a567e | 2015-12-28 13:46:32 +0100 | [diff] [blame] | 233 | gprs_rlc_ul_window(); |
Jacob Erlbeck | 8f8197f | 2015-12-28 13:51:44 +0100 | [diff] [blame^] | 234 | private: |
| 235 | uint16_t m_sns; |
| 236 | uint16_t m_ws; |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 237 | }; |
| 238 | |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 239 | extern "C" { |
| 240 | /* TS 04.60 10.2.2 */ |
Jacob Erlbeck | 4aa78a8 | 2015-12-14 11:13:30 +0100 | [diff] [blame] | 241 | #if OSMO_IS_LITTLE_ENDIAN |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 242 | struct rlc_ul_header { |
| 243 | uint8_t r:1, |
| 244 | si:1, |
| 245 | cv:4, |
| 246 | pt:2; |
| 247 | uint8_t ti:1, |
| 248 | tfi:5, |
| 249 | pi:1, |
| 250 | spare:1; |
| 251 | uint8_t e:1, |
| 252 | bsn:7; |
| 253 | } __attribute__ ((packed)); |
| 254 | |
| 255 | struct rlc_dl_header { |
| 256 | uint8_t usf:3, |
| 257 | s_p:1, |
| 258 | rrbp:2, |
| 259 | pt:2; |
| 260 | uint8_t fbi:1, |
| 261 | tfi:5, |
| 262 | pr:2; |
| 263 | uint8_t e:1, |
| 264 | bsn:7; |
| 265 | } __attribute__ ((packed)); |
| 266 | |
| 267 | struct rlc_li_field { |
| 268 | uint8_t e:1, |
| 269 | m:1, |
| 270 | li:6; |
| 271 | } __attribute__ ((packed)); |
Jacob Erlbeck | 4abc686 | 2015-12-08 15:14:05 +0100 | [diff] [blame] | 272 | |
| 273 | struct rlc_li_field_egprs { |
| 274 | uint8_t e:1, |
| 275 | li:7; |
| 276 | } __attribute__ ((packed)); |
| 277 | |
| 278 | struct gprs_rlc_ul_header_egprs_3 { |
| 279 | uint8_t r:1, |
| 280 | si:1, |
| 281 | cv:4, |
| 282 | tfi_a:2; |
| 283 | uint8_t tfi_b:3, |
| 284 | bsn1_a:5; |
| 285 | uint8_t bsn1_b:6, |
| 286 | cps_a:2; |
| 287 | uint8_t cps_b:2, |
| 288 | spb:2, |
| 289 | rsb:1, |
| 290 | pi:1, |
| 291 | spare:1, |
| 292 | dummy:1; |
| 293 | } __attribute__ ((packed)); |
Jacob Erlbeck | 4aa78a8 | 2015-12-14 11:13:30 +0100 | [diff] [blame] | 294 | #else |
| 295 | # error "Only little endian headers are supported yet. TODO: add missing structs" |
| 296 | #endif |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 297 | } |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 298 | |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 299 | 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] | 300 | { |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 301 | return m_v_b[bsn & mod_sns_half()] == type; |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 302 | } |
| 303 | |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 304 | 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] | 305 | { |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 306 | m_v_b[bsn & mod_sns_half()] = type; |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 307 | } |
| 308 | |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 309 | 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] | 310 | { |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 311 | return is_state(bsn, GPRS_RLC_DL_BSN_NACKED); |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 312 | } |
| 313 | |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 314 | 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] | 315 | { |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 316 | return is_state(bsn, GPRS_RLC_DL_BSN_ACKED); |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 317 | } |
| 318 | |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 319 | 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] | 320 | { |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 321 | return is_state(bsn, GPRS_RLC_DL_BSN_UNACKED); |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 322 | } |
| 323 | |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 324 | 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] | 325 | { |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 326 | return is_state(bsn, GPRS_RLC_DL_BSN_RESEND); |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 327 | } |
| 328 | |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 329 | 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] | 330 | { |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 331 | return is_state(bsn, GPRS_RLC_DL_BSN_INVALID); |
Holger Hans Peter Freyther | 9525567 | 2013-11-23 16:18:18 +0100 | [diff] [blame] | 332 | } |
| 333 | |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 334 | 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] | 335 | { |
| 336 | return m_v_b[bsn & mod_sns_half()]; |
| 337 | } |
| 338 | |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 339 | inline void gprs_rlc_v_b::mark_resend(int bsn) |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 340 | { |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 341 | return mark(bsn, GPRS_RLC_DL_BSN_RESEND); |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 342 | } |
| 343 | |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 344 | inline void gprs_rlc_v_b::mark_unacked(int bsn) |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 345 | { |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 346 | return mark(bsn, GPRS_RLC_DL_BSN_UNACKED); |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 347 | } |
| 348 | |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 349 | inline void gprs_rlc_v_b::mark_acked(int bsn) |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 350 | { |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 351 | return mark(bsn, GPRS_RLC_DL_BSN_ACKED); |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 352 | } |
| 353 | |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 354 | inline void gprs_rlc_v_b::mark_nacked(int bsn) |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 355 | { |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 356 | return mark(bsn, GPRS_RLC_DL_BSN_NACKED); |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 357 | } |
| 358 | |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 359 | inline void gprs_rlc_v_b::mark_invalid(int bsn) |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 360 | { |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 361 | return mark(bsn, GPRS_RLC_DL_BSN_INVALID); |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 362 | } |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 363 | |
Jacob Erlbeck | a3a567e | 2015-12-28 13:46:32 +0100 | [diff] [blame] | 364 | inline gprs_rlc_dl_window::gprs_rlc_dl_window() |
| 365 | : m_v_s(0) |
| 366 | , m_v_a(0) |
Jacob Erlbeck | 8f8197f | 2015-12-28 13:51:44 +0100 | [diff] [blame^] | 367 | , m_sns(RLC_GPRS_SNS) |
| 368 | , m_ws(RLC_GPRS_WS) |
Jacob Erlbeck | a3a567e | 2015-12-28 13:46:32 +0100 | [diff] [blame] | 369 | { |
| 370 | } |
| 371 | |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 372 | inline const uint16_t gprs_rlc_dl_window::sns() const |
| 373 | { |
Jacob Erlbeck | 8f8197f | 2015-12-28 13:51:44 +0100 | [diff] [blame^] | 374 | return m_sns; |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 375 | } |
| 376 | |
| 377 | inline const uint16_t gprs_rlc_dl_window::ws() const |
| 378 | { |
Jacob Erlbeck | 8f8197f | 2015-12-28 13:51:44 +0100 | [diff] [blame^] | 379 | return m_ws; |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 380 | } |
| 381 | |
| 382 | inline const uint16_t gprs_rlc_dl_window::mod_sns() const |
| 383 | { |
| 384 | return sns() - 1; |
| 385 | } |
| 386 | |
Jacob Erlbeck | 93c55d0 | 2015-12-23 16:29:07 +0100 | [diff] [blame] | 387 | inline const uint16_t gprs_rlc_dl_window::mod_sns(uint16_t bsn) const |
| 388 | { |
| 389 | return bsn & mod_sns(); |
| 390 | } |
| 391 | |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 392 | inline const uint16_t gprs_rlc_dl_window::v_s() const |
| 393 | { |
| 394 | return m_v_s; |
| 395 | } |
| 396 | |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 397 | inline const uint16_t gprs_rlc_dl_window::v_s_mod(int offset) const |
| 398 | { |
Jacob Erlbeck | 93c55d0 | 2015-12-23 16:29:07 +0100 | [diff] [blame] | 399 | return mod_sns(m_v_s + offset); |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 400 | } |
| 401 | |
| 402 | inline const uint16_t gprs_rlc_dl_window::v_a() const |
| 403 | { |
| 404 | return m_v_a; |
| 405 | } |
| 406 | |
| 407 | inline bool gprs_rlc_dl_window::window_stalled() const |
| 408 | { |
Jacob Erlbeck | 93c55d0 | 2015-12-23 16:29:07 +0100 | [diff] [blame] | 409 | return (mod_sns(m_v_s - m_v_a)) == ws(); |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 410 | } |
| 411 | |
| 412 | inline bool gprs_rlc_dl_window::window_empty() const |
| 413 | { |
| 414 | return m_v_s == m_v_a; |
| 415 | } |
| 416 | |
| 417 | inline void gprs_rlc_dl_window::increment_send() |
| 418 | { |
| 419 | m_v_s = (m_v_s + 1) & mod_sns(); |
| 420 | } |
| 421 | |
| 422 | inline void gprs_rlc_dl_window::raise(int moves) |
| 423 | { |
| 424 | m_v_a = (m_v_a + moves) & mod_sns(); |
| 425 | } |
| 426 | |
| 427 | inline const int16_t gprs_rlc_dl_window::distance() const |
| 428 | { |
| 429 | return (m_v_s - m_v_a) & mod_sns(); |
| 430 | } |
| 431 | |
Jacob Erlbeck | a3a567e | 2015-12-28 13:46:32 +0100 | [diff] [blame] | 432 | inline gprs_rlc_ul_window::gprs_rlc_ul_window() |
| 433 | : m_v_r(0) |
| 434 | , m_v_q(0) |
Jacob Erlbeck | 8f8197f | 2015-12-28 13:51:44 +0100 | [diff] [blame^] | 435 | , m_sns(RLC_GPRS_SNS) |
| 436 | , m_ws(RLC_GPRS_WS) |
Jacob Erlbeck | a3a567e | 2015-12-28 13:46:32 +0100 | [diff] [blame] | 437 | { |
| 438 | } |
| 439 | |
Jacob Erlbeck | e1ca87f | 2015-12-23 16:40:56 +0100 | [diff] [blame] | 440 | 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] | 441 | { |
| 442 | uint16_t offset_v_q; |
| 443 | |
| 444 | /* current block relative to lowest unreceived block */ |
| 445 | offset_v_q = (bsn - m_v_q) & mod_sns(); |
| 446 | /* If out of window (may happen if blocks below V(Q) are received |
| 447 | * again. */ |
| 448 | return offset_v_q < ws(); |
| 449 | } |
| 450 | |
Jacob Erlbeck | e1ca87f | 2015-12-23 16:40:56 +0100 | [diff] [blame] | 451 | inline bool gprs_rlc_ul_window::is_received(uint16_t bsn) const |
Jacob Erlbeck | 784a0bd | 2015-12-14 11:54:29 +0100 | [diff] [blame] | 452 | { |
| 453 | uint16_t offset_v_r; |
| 454 | |
| 455 | /* Offset to the end of the received window */ |
| 456 | offset_v_r = (m_v_r - 1 - bsn) & mod_sns(); |
| 457 | return is_in_window(bsn) && m_v_n.is_received(bsn) && offset_v_r < ws(); |
| 458 | } |
| 459 | |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 460 | inline const uint16_t gprs_rlc_ul_window::sns() const |
| 461 | { |
Jacob Erlbeck | 8f8197f | 2015-12-28 13:51:44 +0100 | [diff] [blame^] | 462 | return m_sns; |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 463 | } |
| 464 | |
| 465 | inline const uint16_t gprs_rlc_ul_window::ws() const |
| 466 | { |
Jacob Erlbeck | 8f8197f | 2015-12-28 13:51:44 +0100 | [diff] [blame^] | 467 | return m_ws; |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 468 | } |
| 469 | |
| 470 | inline const uint16_t gprs_rlc_ul_window::mod_sns() const |
| 471 | { |
| 472 | return sns() - 1; |
| 473 | } |
| 474 | |
Jacob Erlbeck | 93c55d0 | 2015-12-23 16:29:07 +0100 | [diff] [blame] | 475 | inline const uint16_t gprs_rlc_ul_window::mod_sns(uint16_t bsn) const |
| 476 | { |
| 477 | return bsn & mod_sns(); |
| 478 | } |
| 479 | |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 480 | inline const uint16_t gprs_rlc_ul_window::v_r() const |
| 481 | { |
| 482 | return m_v_r; |
| 483 | } |
| 484 | |
| 485 | inline const uint16_t gprs_rlc_ul_window::v_q() const |
| 486 | { |
| 487 | return m_v_q; |
| 488 | } |
| 489 | |
Daniel Willmann | 8a31f9e | 2013-11-27 17:08:35 +0100 | [diff] [blame] | 490 | inline const uint16_t gprs_rlc_ul_window::ssn() const |
| 491 | { |
| 492 | return m_v_r; |
| 493 | } |
| 494 | |
Daniel Willmann | f4a1ec6 | 2013-12-28 13:57:31 +0100 | [diff] [blame] | 495 | 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] | 496 | { |
Jacob Erlbeck | 93c55d0 | 2015-12-23 16:29:07 +0100 | [diff] [blame] | 497 | m_v_r = mod_sns(m_v_r + moves); |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 498 | } |
| 499 | |
Holger Hans Peter Freyther | 7f3e662 | 2013-11-25 23:51:19 +0100 | [diff] [blame] | 500 | 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] | 501 | { |
Jacob Erlbeck | 93c55d0 | 2015-12-23 16:29:07 +0100 | [diff] [blame] | 502 | m_v_q = mod_sns(m_v_q + incr); |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 503 | } |
Holger Hans Peter Freyther | 270f7fc | 2013-11-24 20:55:02 +0100 | [diff] [blame] | 504 | |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 505 | inline void gprs_rlc_v_n::mark_received(int bsn) |
Holger Hans Peter Freyther | 270f7fc | 2013-11-24 20:55:02 +0100 | [diff] [blame] | 506 | { |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 507 | return mark(bsn, GPRS_RLC_UL_BSN_RECEIVED); |
Holger Hans Peter Freyther | 270f7fc | 2013-11-24 20:55:02 +0100 | [diff] [blame] | 508 | } |
| 509 | |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 510 | inline void gprs_rlc_v_n::mark_missing(int bsn) |
Holger Hans Peter Freyther | 270f7fc | 2013-11-24 20:55:02 +0100 | [diff] [blame] | 511 | { |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 512 | return mark(bsn, GPRS_RLC_UL_BSN_MISSING); |
Holger Hans Peter Freyther | 270f7fc | 2013-11-24 20:55:02 +0100 | [diff] [blame] | 513 | } |
| 514 | |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 515 | 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] | 516 | { |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 517 | return is_state(bsn, GPRS_RLC_UL_BSN_RECEIVED); |
Holger Hans Peter Freyther | 270f7fc | 2013-11-24 20:55:02 +0100 | [diff] [blame] | 518 | } |
| 519 | |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 520 | 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] | 521 | { |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 522 | return m_v_n[bsn & mod_sns_half()] == type; |
| 523 | } |
| 524 | |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 525 | 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] | 526 | { |
| 527 | m_v_n[bsn & mod_sns_half()] = type; |
| 528 | } |
| 529 | |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 530 | 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] | 531 | { |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 532 | return m_v_n[bsn & mod_sns_half()]; |
Holger Hans Peter Freyther | 270f7fc | 2013-11-24 20:55:02 +0100 | [diff] [blame] | 533 | } |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 534 | |
| 535 | inline gprs_rlc_data *gprs_rlc::block(int bsn) |
| 536 | { |
| 537 | return &m_blocks[bsn & mod_sns_half()]; |
| 538 | } |