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 | |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 28 | #define RLC_MAX_SNS 128 /* GPRS, must be power of 2 */ |
| 29 | #define RLC_MAX_WS 64 /* max window size */ |
| 30 | #define RLC_MAX_LEN 54 /* CS-4 including spare bits */ |
| 31 | |
Holger Hans Peter Freyther | 35cc1c0 | 2014-07-02 14:48:44 +0200 | [diff] [blame] | 32 | struct BTS; |
Holger Hans Peter Freyther | cbb00eb | 2013-11-25 23:26:06 +0100 | [diff] [blame] | 33 | struct gprs_rlc_v_n; |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 34 | |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 35 | /* The state of a BSN in the send/receive window */ |
| 36 | enum gprs_rlc_ul_bsn_state { |
| 37 | GPRS_RLC_UL_BSN_INVALID, |
| 38 | GPRS_RLC_UL_BSN_RECEIVED, |
| 39 | GPRS_RLC_UL_BSN_MISSING, |
| 40 | GPRS_RLC_UL_BSN_MAX, |
| 41 | }; |
| 42 | |
| 43 | enum gprs_rlc_dl_bsn_state { |
| 44 | GPRS_RLC_DL_BSN_INVALID, |
| 45 | GPRS_RLC_DL_BSN_NACKED, |
| 46 | GPRS_RLC_DL_BSN_ACKED, |
| 47 | GPRS_RLC_DL_BSN_UNACKED, |
| 48 | GPRS_RLC_DL_BSN_RESEND, |
| 49 | GPRS_RLC_DL_BSN_MAX, |
| 50 | }; |
| 51 | |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 52 | |
| 53 | static inline uint16_t mod_sns_half() |
| 54 | { |
| 55 | return (RLC_MAX_SNS / 2) - 1; |
| 56 | } |
| 57 | |
Jacob Erlbeck | 4abc686 | 2015-12-08 15:14:05 +0100 | [diff] [blame^] | 58 | struct gprs_rlc_ul_data_block_info { |
| 59 | unsigned int data_len; /* EGPRS: N2, GPRS: N2-2, N-2 */ |
| 60 | unsigned int bsn; |
| 61 | unsigned int ti; |
| 62 | unsigned int e; |
| 63 | unsigned int cv; |
| 64 | unsigned int pi; |
| 65 | unsigned int spb; |
| 66 | }; |
| 67 | |
| 68 | struct gprs_rlc_ul_header_egprs { |
| 69 | GprsCodingScheme cs; |
| 70 | unsigned int r; |
| 71 | unsigned int si; |
| 72 | unsigned int tfi; |
| 73 | unsigned int cps; |
| 74 | unsigned int rsb; |
| 75 | unsigned int num_data_blocks; |
| 76 | unsigned int data_offs_bits[2]; |
| 77 | struct gprs_rlc_ul_data_block_info block_info[2]; |
| 78 | }; |
| 79 | |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 80 | struct gprs_rlc_data { |
| 81 | uint8_t *prepare(size_t block_data_length); |
Holger Hans Peter Freyther | 423dd22 | 2013-11-25 23:24:29 +0100 | [diff] [blame] | 82 | void put_data(const uint8_t *data, size_t len); |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 83 | |
| 84 | /* block history */ |
| 85 | uint8_t block[RLC_MAX_LEN]; |
| 86 | /* block len of history */ |
| 87 | uint8_t len; |
Jacob Erlbeck | 1751c62 | 2015-06-04 12:12:32 +0200 | [diff] [blame] | 88 | |
| 89 | uint8_t cs; |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 90 | }; |
| 91 | |
| 92 | /* |
| 93 | * I hold the currently transferred blocks and will provide |
| 94 | * the routines to manipulate these arrays. |
| 95 | */ |
| 96 | struct gprs_rlc { |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 97 | gprs_rlc_data *block(int bsn); |
| 98 | gprs_rlc_data m_blocks[RLC_MAX_SNS/2]; |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 99 | }; |
| 100 | |
Daniel Willmann | 146514e | 2013-12-28 18:24:42 +0100 | [diff] [blame] | 101 | /** |
| 102 | * TODO: for GPRS/EDGE maybe make sns a template parameter |
| 103 | * so we create specialized versions... |
| 104 | */ |
| 105 | struct gprs_rlc_v_b { |
| 106 | /* Check for an individual frame */ |
| 107 | bool is_unacked(int bsn) const; |
| 108 | bool is_nacked(int bsn) const; |
| 109 | bool is_acked(int bsn) const; |
| 110 | bool is_resend(int bsn) const; |
| 111 | bool is_invalid(int bsn) const; |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 112 | gprs_rlc_dl_bsn_state get_state(int bsn) const; |
Daniel Willmann | 146514e | 2013-12-28 18:24:42 +0100 | [diff] [blame] | 113 | |
| 114 | /* Mark a RLC frame for something */ |
| 115 | void mark_unacked(int bsn); |
| 116 | void mark_nacked(int bsn); |
| 117 | void mark_acked(int bsn); |
| 118 | void mark_resend(int bsn); |
| 119 | void mark_invalid(int bsn); |
| 120 | |
| 121 | void reset(); |
| 122 | |
| 123 | |
| 124 | private: |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 125 | bool is_state(int bsn, const gprs_rlc_dl_bsn_state state) const; |
| 126 | void mark(int bsn, const gprs_rlc_dl_bsn_state state); |
Daniel Willmann | 146514e | 2013-12-28 18:24:42 +0100 | [diff] [blame] | 127 | |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 128 | 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] | 129 | }; |
| 130 | |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 131 | |
| 132 | /** |
| 133 | * TODO: The UL/DL code could/should share a baseclass but |
| 134 | * we are using llist_for_each_entry for the TBF which |
| 135 | * requires everything which creates a requirement for a POD |
| 136 | * type and in < C++11 something that is using even if the |
| 137 | * most simple form of inheritance is not a POD anymore. |
| 138 | */ |
| 139 | struct gprs_rlc_dl_window { |
Daniel Willmann | 7e994e3 | 2014-08-07 15:49:21 +0200 | [diff] [blame] | 140 | void reset(); |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 141 | const uint16_t mod_sns() const; |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 142 | const uint16_t sns() const; |
| 143 | const uint16_t ws() const; |
| 144 | |
| 145 | bool window_stalled() const; |
| 146 | bool window_empty() const; |
| 147 | |
| 148 | void increment_send(); |
| 149 | void raise(int moves); |
| 150 | |
| 151 | const uint16_t v_s() const; |
| 152 | const uint16_t v_s_mod(int offset) const; |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 153 | const uint16_t v_a() const; |
| 154 | const int16_t distance() const; |
| 155 | |
Daniel Willmann | 146514e | 2013-12-28 18:24:42 +0100 | [diff] [blame] | 156 | /* Methods to manage reception */ |
| 157 | int resend_needed(); |
| 158 | int mark_for_resend(); |
| 159 | void update(BTS *bts, char *show_rbb, uint8_t ssn, |
| 160 | uint16_t *lost, uint16_t *received); |
| 161 | int move_window(); |
Daniel Willmann | 3ce011f | 2014-01-15 12:45:56 +0100 | [diff] [blame] | 162 | void show_state(char *show_rbb); |
Daniel Willmann | 146514e | 2013-12-28 18:24:42 +0100 | [diff] [blame] | 163 | int count_unacked(); |
| 164 | |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 165 | uint16_t m_v_s; /* send state */ |
| 166 | uint16_t m_v_a; /* ack state */ |
Daniel Willmann | 146514e | 2013-12-28 18:24:42 +0100 | [diff] [blame] | 167 | |
| 168 | gprs_rlc_v_b m_v_b; |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 169 | }; |
| 170 | |
Daniel Willmann | 7c3751b | 2013-12-28 13:59:24 +0100 | [diff] [blame] | 171 | struct gprs_rlc_v_n { |
| 172 | void reset(); |
| 173 | |
| 174 | void mark_received(int bsn); |
| 175 | void mark_missing(int bsn); |
| 176 | |
| 177 | bool is_received(int bsn) const; |
| 178 | |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 179 | gprs_rlc_ul_bsn_state state(int bsn) const; |
Daniel Willmann | 7c3751b | 2013-12-28 13:59:24 +0100 | [diff] [blame] | 180 | private: |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 181 | bool is_state(int bsn, const gprs_rlc_ul_bsn_state state) const; |
| 182 | void mark(int bsn, const gprs_rlc_ul_bsn_state state); |
| 183 | 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] | 184 | }; |
| 185 | |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 186 | struct gprs_rlc_ul_window { |
| 187 | const uint16_t mod_sns() const; |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 188 | const uint16_t sns() const; |
| 189 | const uint16_t ws() const; |
| 190 | |
| 191 | const uint16_t v_r() const; |
| 192 | const uint16_t v_q() const; |
| 193 | |
Daniel Willmann | 8a31f9e | 2013-11-27 17:08:35 +0100 | [diff] [blame] | 194 | const uint16_t ssn() const; |
| 195 | |
Holger Hans Peter Freyther | 6ab5b24 | 2013-11-24 22:43:03 +0100 | [diff] [blame] | 196 | bool is_in_window(uint8_t bsn) const; |
| 197 | |
Daniel Willmann | 7c3751b | 2013-12-28 13:59:24 +0100 | [diff] [blame] | 198 | void update_rbb(char *rbb); |
Daniel Willmann | f4a1ec6 | 2013-12-28 13:57:31 +0100 | [diff] [blame] | 199 | void raise_v_r_to(int moves); |
Daniel Willmann | 7c3751b | 2013-12-28 13:59:24 +0100 | [diff] [blame] | 200 | void raise_v_r(const uint16_t bsn); |
| 201 | uint16_t raise_v_q(); |
Holger Hans Peter Freyther | cbb00eb | 2013-11-25 23:26:06 +0100 | [diff] [blame] | 202 | |
Holger Hans Peter Freyther | 7f3e662 | 2013-11-25 23:51:19 +0100 | [diff] [blame] | 203 | void raise_v_q(int); |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 204 | |
Daniel Willmann | 5584479 | 2013-12-28 14:41:00 +0100 | [diff] [blame] | 205 | uint16_t receive_bsn(const uint16_t bsn); |
| 206 | |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 207 | uint16_t m_v_r; /* receive state */ |
| 208 | uint16_t m_v_q; /* receive window state */ |
Daniel Willmann | 7c3751b | 2013-12-28 13:59:24 +0100 | [diff] [blame] | 209 | |
| 210 | gprs_rlc_v_n m_v_n; |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 211 | }; |
| 212 | |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 213 | extern "C" { |
| 214 | /* TS 04.60 10.2.2 */ |
Jacob Erlbeck | 4aa78a8 | 2015-12-14 11:13:30 +0100 | [diff] [blame] | 215 | #if OSMO_IS_LITTLE_ENDIAN |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 216 | struct rlc_ul_header { |
| 217 | uint8_t r:1, |
| 218 | si:1, |
| 219 | cv:4, |
| 220 | pt:2; |
| 221 | uint8_t ti:1, |
| 222 | tfi:5, |
| 223 | pi:1, |
| 224 | spare:1; |
| 225 | uint8_t e:1, |
| 226 | bsn:7; |
| 227 | } __attribute__ ((packed)); |
| 228 | |
| 229 | struct rlc_dl_header { |
| 230 | uint8_t usf:3, |
| 231 | s_p:1, |
| 232 | rrbp:2, |
| 233 | pt:2; |
| 234 | uint8_t fbi:1, |
| 235 | tfi:5, |
| 236 | pr:2; |
| 237 | uint8_t e:1, |
| 238 | bsn:7; |
| 239 | } __attribute__ ((packed)); |
| 240 | |
| 241 | struct rlc_li_field { |
| 242 | uint8_t e:1, |
| 243 | m:1, |
| 244 | li:6; |
| 245 | } __attribute__ ((packed)); |
Jacob Erlbeck | 4abc686 | 2015-12-08 15:14:05 +0100 | [diff] [blame^] | 246 | |
| 247 | struct rlc_li_field_egprs { |
| 248 | uint8_t e:1, |
| 249 | li:7; |
| 250 | } __attribute__ ((packed)); |
| 251 | |
| 252 | struct gprs_rlc_ul_header_egprs_3 { |
| 253 | uint8_t r:1, |
| 254 | si:1, |
| 255 | cv:4, |
| 256 | tfi_a:2; |
| 257 | uint8_t tfi_b:3, |
| 258 | bsn1_a:5; |
| 259 | uint8_t bsn1_b:6, |
| 260 | cps_a:2; |
| 261 | uint8_t cps_b:2, |
| 262 | spb:2, |
| 263 | rsb:1, |
| 264 | pi:1, |
| 265 | spare:1, |
| 266 | dummy:1; |
| 267 | } __attribute__ ((packed)); |
Jacob Erlbeck | 4aa78a8 | 2015-12-14 11:13:30 +0100 | [diff] [blame] | 268 | #else |
| 269 | # error "Only little endian headers are supported yet. TODO: add missing structs" |
| 270 | #endif |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 271 | } |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 272 | |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 273 | 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] | 274 | { |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 275 | return m_v_b[bsn & mod_sns_half()] == type; |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 276 | } |
| 277 | |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 278 | 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] | 279 | { |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 280 | m_v_b[bsn & mod_sns_half()] = type; |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 281 | } |
| 282 | |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 283 | 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] | 284 | { |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 285 | return is_state(bsn, GPRS_RLC_DL_BSN_NACKED); |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 286 | } |
| 287 | |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 288 | 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] | 289 | { |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 290 | return is_state(bsn, GPRS_RLC_DL_BSN_ACKED); |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 291 | } |
| 292 | |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 293 | 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] | 294 | { |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 295 | return is_state(bsn, GPRS_RLC_DL_BSN_UNACKED); |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 296 | } |
| 297 | |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 298 | 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] | 299 | { |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 300 | return is_state(bsn, GPRS_RLC_DL_BSN_RESEND); |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 301 | } |
| 302 | |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 303 | 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] | 304 | { |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 305 | return is_state(bsn, GPRS_RLC_DL_BSN_INVALID); |
Holger Hans Peter Freyther | 9525567 | 2013-11-23 16:18:18 +0100 | [diff] [blame] | 306 | } |
| 307 | |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 308 | 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] | 309 | { |
| 310 | return m_v_b[bsn & mod_sns_half()]; |
| 311 | } |
| 312 | |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 313 | inline void gprs_rlc_v_b::mark_resend(int bsn) |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 314 | { |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 315 | return mark(bsn, GPRS_RLC_DL_BSN_RESEND); |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 316 | } |
| 317 | |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 318 | inline void gprs_rlc_v_b::mark_unacked(int bsn) |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 319 | { |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 320 | return mark(bsn, GPRS_RLC_DL_BSN_UNACKED); |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 321 | } |
| 322 | |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 323 | inline void gprs_rlc_v_b::mark_acked(int bsn) |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 324 | { |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 325 | return mark(bsn, GPRS_RLC_DL_BSN_ACKED); |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 326 | } |
| 327 | |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 328 | inline void gprs_rlc_v_b::mark_nacked(int bsn) |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 329 | { |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 330 | return mark(bsn, GPRS_RLC_DL_BSN_NACKED); |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 331 | } |
| 332 | |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 333 | inline void gprs_rlc_v_b::mark_invalid(int bsn) |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 334 | { |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 335 | return mark(bsn, GPRS_RLC_DL_BSN_INVALID); |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 336 | } |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 337 | |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 338 | inline const uint16_t gprs_rlc_dl_window::sns() const |
| 339 | { |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 340 | return RLC_MAX_SNS; |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 341 | } |
| 342 | |
| 343 | inline const uint16_t gprs_rlc_dl_window::ws() const |
| 344 | { |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 345 | return RLC_MAX_WS; |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 346 | } |
| 347 | |
| 348 | inline const uint16_t gprs_rlc_dl_window::mod_sns() const |
| 349 | { |
| 350 | return sns() - 1; |
| 351 | } |
| 352 | |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 353 | inline const uint16_t gprs_rlc_dl_window::v_s() const |
| 354 | { |
| 355 | return m_v_s; |
| 356 | } |
| 357 | |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 358 | inline const uint16_t gprs_rlc_dl_window::v_s_mod(int offset) const |
| 359 | { |
| 360 | return (m_v_s + offset) & mod_sns(); |
| 361 | } |
| 362 | |
| 363 | inline const uint16_t gprs_rlc_dl_window::v_a() const |
| 364 | { |
| 365 | return m_v_a; |
| 366 | } |
| 367 | |
| 368 | inline bool gprs_rlc_dl_window::window_stalled() const |
| 369 | { |
| 370 | return ((m_v_s - m_v_a) & mod_sns()) == ws(); |
| 371 | } |
| 372 | |
| 373 | inline bool gprs_rlc_dl_window::window_empty() const |
| 374 | { |
| 375 | return m_v_s == m_v_a; |
| 376 | } |
| 377 | |
| 378 | inline void gprs_rlc_dl_window::increment_send() |
| 379 | { |
| 380 | m_v_s = (m_v_s + 1) & mod_sns(); |
| 381 | } |
| 382 | |
| 383 | inline void gprs_rlc_dl_window::raise(int moves) |
| 384 | { |
| 385 | m_v_a = (m_v_a + moves) & mod_sns(); |
| 386 | } |
| 387 | |
| 388 | inline const int16_t gprs_rlc_dl_window::distance() const |
| 389 | { |
| 390 | return (m_v_s - m_v_a) & mod_sns(); |
| 391 | } |
| 392 | |
Holger Hans Peter Freyther | 6ab5b24 | 2013-11-24 22:43:03 +0100 | [diff] [blame] | 393 | inline bool gprs_rlc_ul_window::is_in_window(uint8_t bsn) const |
| 394 | { |
| 395 | uint16_t offset_v_q; |
| 396 | |
| 397 | /* current block relative to lowest unreceived block */ |
| 398 | offset_v_q = (bsn - m_v_q) & mod_sns(); |
| 399 | /* If out of window (may happen if blocks below V(Q) are received |
| 400 | * again. */ |
| 401 | return offset_v_q < ws(); |
| 402 | } |
| 403 | |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 404 | inline const uint16_t gprs_rlc_ul_window::sns() const |
| 405 | { |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 406 | return RLC_MAX_SNS; |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 407 | } |
| 408 | |
| 409 | inline const uint16_t gprs_rlc_ul_window::ws() const |
| 410 | { |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 411 | return RLC_MAX_WS; |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 412 | } |
| 413 | |
| 414 | inline const uint16_t gprs_rlc_ul_window::mod_sns() const |
| 415 | { |
| 416 | return sns() - 1; |
| 417 | } |
| 418 | |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 419 | inline const uint16_t gprs_rlc_ul_window::v_r() const |
| 420 | { |
| 421 | return m_v_r; |
| 422 | } |
| 423 | |
| 424 | inline const uint16_t gprs_rlc_ul_window::v_q() const |
| 425 | { |
| 426 | return m_v_q; |
| 427 | } |
| 428 | |
Daniel Willmann | 8a31f9e | 2013-11-27 17:08:35 +0100 | [diff] [blame] | 429 | inline const uint16_t gprs_rlc_ul_window::ssn() const |
| 430 | { |
| 431 | return m_v_r; |
| 432 | } |
| 433 | |
Daniel Willmann | f4a1ec6 | 2013-12-28 13:57:31 +0100 | [diff] [blame] | 434 | 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] | 435 | { |
| 436 | m_v_r = (m_v_r + moves) & mod_sns(); |
| 437 | } |
| 438 | |
Holger Hans Peter Freyther | 7f3e662 | 2013-11-25 23:51:19 +0100 | [diff] [blame] | 439 | 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] | 440 | { |
| 441 | m_v_q = (m_v_q + incr) & mod_sns(); |
| 442 | } |
Holger Hans Peter Freyther | 270f7fc | 2013-11-24 20:55:02 +0100 | [diff] [blame] | 443 | |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 444 | inline void gprs_rlc_v_n::mark_received(int bsn) |
Holger Hans Peter Freyther | 270f7fc | 2013-11-24 20:55:02 +0100 | [diff] [blame] | 445 | { |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 446 | return mark(bsn, GPRS_RLC_UL_BSN_RECEIVED); |
Holger Hans Peter Freyther | 270f7fc | 2013-11-24 20:55:02 +0100 | [diff] [blame] | 447 | } |
| 448 | |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 449 | inline void gprs_rlc_v_n::mark_missing(int bsn) |
Holger Hans Peter Freyther | 270f7fc | 2013-11-24 20:55:02 +0100 | [diff] [blame] | 450 | { |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 451 | return mark(bsn, GPRS_RLC_UL_BSN_MISSING); |
Holger Hans Peter Freyther | 270f7fc | 2013-11-24 20:55:02 +0100 | [diff] [blame] | 452 | } |
| 453 | |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 454 | 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] | 455 | { |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 456 | return is_state(bsn, GPRS_RLC_UL_BSN_RECEIVED); |
Holger Hans Peter Freyther | 270f7fc | 2013-11-24 20:55:02 +0100 | [diff] [blame] | 457 | } |
| 458 | |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 459 | 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] | 460 | { |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 461 | return m_v_n[bsn & mod_sns_half()] == type; |
| 462 | } |
| 463 | |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 464 | 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] | 465 | { |
| 466 | m_v_n[bsn & mod_sns_half()] = type; |
| 467 | } |
| 468 | |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 469 | 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] | 470 | { |
Daniel Willmann | d54d9f5 | 2013-12-28 21:16:13 +0100 | [diff] [blame] | 471 | return m_v_n[bsn & mod_sns_half()]; |
Holger Hans Peter Freyther | 270f7fc | 2013-11-24 20:55:02 +0100 | [diff] [blame] | 472 | } |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 473 | |
| 474 | inline gprs_rlc_data *gprs_rlc::block(int bsn) |
| 475 | { |
| 476 | return &m_blocks[bsn & mod_sns_half()]; |
| 477 | } |