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 | |
| 22 | #include <stdint.h> |
| 23 | |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 24 | #define RLC_MAX_SNS 128 /* GPRS, must be power of 2 */ |
| 25 | #define RLC_MAX_WS 64 /* max window size */ |
| 26 | #define RLC_MAX_LEN 54 /* CS-4 including spare bits */ |
| 27 | |
Holger Hans Peter Freyther | df6b4f5 | 2013-11-24 17:05:48 +0100 | [diff] [blame] | 28 | class BTS; |
Holger Hans Peter Freyther | cbb00eb | 2013-11-25 23:26:06 +0100 | [diff] [blame] | 29 | struct gprs_rlc_v_n; |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 30 | |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 31 | |
| 32 | static inline uint16_t mod_sns_half() |
| 33 | { |
| 34 | return (RLC_MAX_SNS / 2) - 1; |
| 35 | } |
| 36 | |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 37 | struct gprs_rlc_data { |
| 38 | uint8_t *prepare(size_t block_data_length); |
Holger Hans Peter Freyther | 423dd22 | 2013-11-25 23:24:29 +0100 | [diff] [blame] | 39 | void put_data(const uint8_t *data, size_t len); |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 40 | |
| 41 | /* block history */ |
| 42 | uint8_t block[RLC_MAX_LEN]; |
| 43 | /* block len of history */ |
| 44 | uint8_t len; |
| 45 | }; |
| 46 | |
| 47 | /* |
| 48 | * I hold the currently transferred blocks and will provide |
| 49 | * the routines to manipulate these arrays. |
| 50 | */ |
| 51 | struct gprs_rlc { |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 52 | gprs_rlc_data *block(int bsn); |
| 53 | gprs_rlc_data m_blocks[RLC_MAX_SNS/2]; |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 54 | }; |
| 55 | |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 56 | |
| 57 | /** |
| 58 | * TODO: The UL/DL code could/should share a baseclass but |
| 59 | * we are using llist_for_each_entry for the TBF which |
| 60 | * requires everything which creates a requirement for a POD |
| 61 | * type and in < C++11 something that is using even if the |
| 62 | * most simple form of inheritance is not a POD anymore. |
| 63 | */ |
| 64 | struct gprs_rlc_dl_window { |
| 65 | const uint16_t mod_sns() const; |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 66 | const uint16_t sns() const; |
| 67 | const uint16_t ws() const; |
| 68 | |
| 69 | bool window_stalled() const; |
| 70 | bool window_empty() const; |
| 71 | |
| 72 | void increment_send(); |
| 73 | void raise(int moves); |
| 74 | |
| 75 | const uint16_t v_s() const; |
| 76 | const uint16_t v_s_mod(int offset) const; |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 77 | const uint16_t v_a() const; |
| 78 | const int16_t distance() const; |
| 79 | |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 80 | uint16_t m_v_s; /* send state */ |
| 81 | uint16_t m_v_a; /* ack state */ |
| 82 | }; |
| 83 | |
| 84 | struct gprs_rlc_ul_window { |
| 85 | const uint16_t mod_sns() const; |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 86 | const uint16_t sns() const; |
| 87 | const uint16_t ws() const; |
| 88 | |
| 89 | const uint16_t v_r() const; |
| 90 | const uint16_t v_q() const; |
| 91 | |
Daniel Willmann | 8a31f9e | 2013-11-27 17:08:35 +0100 | [diff] [blame] | 92 | const uint16_t ssn() const; |
| 93 | |
Holger Hans Peter Freyther | 6ab5b24 | 2013-11-24 22:43:03 +0100 | [diff] [blame] | 94 | bool is_in_window(uint8_t bsn) const; |
| 95 | |
Daniel Willmann | 8a31f9e | 2013-11-27 17:08:35 +0100 | [diff] [blame] | 96 | void update_rbb(const gprs_rlc_v_n *v_n, char *rbb); |
Holger Hans Peter Freyther | 7f3e662 | 2013-11-25 23:51:19 +0100 | [diff] [blame] | 97 | void raise_v_r(int moves); |
| 98 | void raise_v_r(const uint16_t bsn, gprs_rlc_v_n *v_n); |
| 99 | uint16_t raise_v_q(gprs_rlc_v_n *v_n); |
Holger Hans Peter Freyther | cbb00eb | 2013-11-25 23:26:06 +0100 | [diff] [blame] | 100 | |
Holger Hans Peter Freyther | 7f3e662 | 2013-11-25 23:51:19 +0100 | [diff] [blame] | 101 | void raise_v_q(int); |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 102 | |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 103 | uint16_t m_v_r; /* receive state */ |
| 104 | uint16_t m_v_q; /* receive window state */ |
| 105 | }; |
| 106 | |
Holger Hans Peter Freyther | df6b4f5 | 2013-11-24 17:05:48 +0100 | [diff] [blame] | 107 | /** |
| 108 | * TODO: for GPRS/EDGE maybe make sns a template parameter |
| 109 | * so we create specialized versions... |
| 110 | */ |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 111 | struct gprs_rlc_v_b { |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 112 | int resend_needed(const gprs_rlc_dl_window& window); |
| 113 | int mark_for_resend(const gprs_rlc_dl_window& window); |
| 114 | void update(BTS *bts, char *show_rbb, uint8_t ssn, |
| 115 | const gprs_rlc_dl_window& window, |
Holger Hans Peter Freyther | df6b4f5 | 2013-11-24 17:05:48 +0100 | [diff] [blame] | 116 | uint16_t *lost, uint16_t *received); |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 117 | int move_window(const gprs_rlc_dl_window& window); |
| 118 | void state(char *show_rbb, const gprs_rlc_dl_window& window); |
| 119 | int count_unacked(const gprs_rlc_dl_window& window); |
Holger Hans Peter Freyther | 1577779 | 2013-11-24 00:18:47 +0100 | [diff] [blame] | 120 | |
| 121 | /* Check for an individual frame */ |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 122 | bool is_unacked(int bsn) const; |
| 123 | bool is_nacked(int bsn) const; |
| 124 | bool is_acked(int bsn) const; |
| 125 | bool is_resend(int bsn) const; |
| 126 | bool is_invalid(int bsn) const; |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 127 | |
Holger Hans Peter Freyther | 1577779 | 2013-11-24 00:18:47 +0100 | [diff] [blame] | 128 | /* Mark a RLC frame for something */ |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 129 | void mark_unacked(int bsn); |
| 130 | void mark_nacked(int bsn); |
| 131 | void mark_acked(int bsn); |
| 132 | void mark_resend(int bsn); |
| 133 | void mark_invalid(int bsn); |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 134 | |
| 135 | void reset(); |
| 136 | |
| 137 | private: |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 138 | bool is_state(int bsn, const char state) const; |
| 139 | void mark(int bsn, const char state); |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 140 | |
| 141 | char m_v_b[RLC_MAX_SNS/2]; /* acknowledge state array */ |
| 142 | }; |
| 143 | |
Holger Hans Peter Freyther | 270f7fc | 2013-11-24 20:55:02 +0100 | [diff] [blame] | 144 | struct gprs_rlc_v_n { |
Holger Hans Peter Freyther | e9b1ebb | 2013-11-24 22:00:43 +0100 | [diff] [blame] | 145 | void reset(); |
| 146 | |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 147 | void mark_received(int bsn); |
| 148 | void mark_missing(int bsn); |
Holger Hans Peter Freyther | 270f7fc | 2013-11-24 20:55:02 +0100 | [diff] [blame] | 149 | |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 150 | bool is_received(int bsn) const; |
Holger Hans Peter Freyther | 270f7fc | 2013-11-24 20:55:02 +0100 | [diff] [blame] | 151 | |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 152 | char state(int bsn) const; |
Holger Hans Peter Freyther | 270f7fc | 2013-11-24 20:55:02 +0100 | [diff] [blame] | 153 | private: |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 154 | bool is_state(int bsn, const char state) const; |
| 155 | void mark(int bsn, const char state); |
Holger Hans Peter Freyther | 270f7fc | 2013-11-24 20:55:02 +0100 | [diff] [blame] | 156 | char m_v_n[RLC_MAX_SNS/2]; /* receive state array */ |
| 157 | }; |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 158 | |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 159 | extern "C" { |
| 160 | /* TS 04.60 10.2.2 */ |
| 161 | struct rlc_ul_header { |
| 162 | uint8_t r:1, |
| 163 | si:1, |
| 164 | cv:4, |
| 165 | pt:2; |
| 166 | uint8_t ti:1, |
| 167 | tfi:5, |
| 168 | pi:1, |
| 169 | spare:1; |
| 170 | uint8_t e:1, |
| 171 | bsn:7; |
| 172 | } __attribute__ ((packed)); |
| 173 | |
| 174 | struct rlc_dl_header { |
| 175 | uint8_t usf:3, |
| 176 | s_p:1, |
| 177 | rrbp:2, |
| 178 | pt:2; |
| 179 | uint8_t fbi:1, |
| 180 | tfi:5, |
| 181 | pr:2; |
| 182 | uint8_t e:1, |
| 183 | bsn:7; |
| 184 | } __attribute__ ((packed)); |
| 185 | |
| 186 | struct rlc_li_field { |
| 187 | uint8_t e:1, |
| 188 | m:1, |
| 189 | li:6; |
| 190 | } __attribute__ ((packed)); |
| 191 | } |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 192 | |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 193 | inline bool gprs_rlc_v_b::is_state(int bsn, const char type) const |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 194 | { |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 195 | return m_v_b[bsn & mod_sns_half()] == type; |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 196 | } |
| 197 | |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 198 | inline void gprs_rlc_v_b::mark(int bsn, const char type) |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 199 | { |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 200 | m_v_b[bsn & mod_sns_half()] = type; |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 201 | } |
| 202 | |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 203 | 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] | 204 | { |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 205 | return is_state(bsn, 'N'); |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 206 | } |
| 207 | |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 208 | 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] | 209 | { |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 210 | return is_state(bsn, 'A'); |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 211 | } |
| 212 | |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 213 | 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] | 214 | { |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 215 | return is_state(bsn, 'U'); |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 216 | } |
| 217 | |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 218 | 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] | 219 | { |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 220 | return is_state(bsn, 'X'); |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 221 | } |
| 222 | |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 223 | 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] | 224 | { |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 225 | return is_state(bsn, 'I'); |
Holger Hans Peter Freyther | 9525567 | 2013-11-23 16:18:18 +0100 | [diff] [blame] | 226 | } |
| 227 | |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 228 | inline void gprs_rlc_v_b::mark_resend(int bsn) |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 229 | { |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 230 | return mark(bsn, 'X'); |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 231 | } |
| 232 | |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 233 | inline void gprs_rlc_v_b::mark_unacked(int bsn) |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 234 | { |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 235 | return mark(bsn, 'U'); |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 236 | } |
| 237 | |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 238 | inline void gprs_rlc_v_b::mark_acked(int bsn) |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 239 | { |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 240 | return mark(bsn, 'A'); |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 241 | } |
| 242 | |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 243 | inline void gprs_rlc_v_b::mark_nacked(int bsn) |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 244 | { |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 245 | return mark(bsn, 'N'); |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 246 | } |
| 247 | |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 248 | inline void gprs_rlc_v_b::mark_invalid(int bsn) |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 249 | { |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 250 | return mark(bsn, 'I'); |
Holger Hans Peter Freyther | 6b5660c | 2013-11-23 16:10:48 +0100 | [diff] [blame] | 251 | } |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 252 | |
| 253 | |
| 254 | inline const uint16_t gprs_rlc_dl_window::sns() const |
| 255 | { |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 256 | return RLC_MAX_SNS; |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 257 | } |
| 258 | |
| 259 | inline const uint16_t gprs_rlc_dl_window::ws() const |
| 260 | { |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 261 | return RLC_MAX_WS; |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 262 | } |
| 263 | |
| 264 | inline const uint16_t gprs_rlc_dl_window::mod_sns() const |
| 265 | { |
| 266 | return sns() - 1; |
| 267 | } |
| 268 | |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 269 | inline const uint16_t gprs_rlc_dl_window::v_s() const |
| 270 | { |
| 271 | return m_v_s; |
| 272 | } |
| 273 | |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 274 | inline const uint16_t gprs_rlc_dl_window::v_s_mod(int offset) const |
| 275 | { |
| 276 | return (m_v_s + offset) & mod_sns(); |
| 277 | } |
| 278 | |
| 279 | inline const uint16_t gprs_rlc_dl_window::v_a() const |
| 280 | { |
| 281 | return m_v_a; |
| 282 | } |
| 283 | |
| 284 | inline bool gprs_rlc_dl_window::window_stalled() const |
| 285 | { |
| 286 | return ((m_v_s - m_v_a) & mod_sns()) == ws(); |
| 287 | } |
| 288 | |
| 289 | inline bool gprs_rlc_dl_window::window_empty() const |
| 290 | { |
| 291 | return m_v_s == m_v_a; |
| 292 | } |
| 293 | |
| 294 | inline void gprs_rlc_dl_window::increment_send() |
| 295 | { |
| 296 | m_v_s = (m_v_s + 1) & mod_sns(); |
| 297 | } |
| 298 | |
| 299 | inline void gprs_rlc_dl_window::raise(int moves) |
| 300 | { |
| 301 | m_v_a = (m_v_a + moves) & mod_sns(); |
| 302 | } |
| 303 | |
| 304 | inline const int16_t gprs_rlc_dl_window::distance() const |
| 305 | { |
| 306 | return (m_v_s - m_v_a) & mod_sns(); |
| 307 | } |
| 308 | |
Holger Hans Peter Freyther | 6ab5b24 | 2013-11-24 22:43:03 +0100 | [diff] [blame] | 309 | inline bool gprs_rlc_ul_window::is_in_window(uint8_t bsn) const |
| 310 | { |
| 311 | uint16_t offset_v_q; |
| 312 | |
| 313 | /* current block relative to lowest unreceived block */ |
| 314 | offset_v_q = (bsn - m_v_q) & mod_sns(); |
| 315 | /* If out of window (may happen if blocks below V(Q) are received |
| 316 | * again. */ |
| 317 | return offset_v_q < ws(); |
| 318 | } |
| 319 | |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 320 | inline const uint16_t gprs_rlc_ul_window::sns() const |
| 321 | { |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 322 | return RLC_MAX_SNS; |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 323 | } |
| 324 | |
| 325 | inline const uint16_t gprs_rlc_ul_window::ws() const |
| 326 | { |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 327 | return RLC_MAX_WS; |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 328 | } |
| 329 | |
| 330 | inline const uint16_t gprs_rlc_ul_window::mod_sns() const |
| 331 | { |
| 332 | return sns() - 1; |
| 333 | } |
| 334 | |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 335 | inline const uint16_t gprs_rlc_ul_window::v_r() const |
| 336 | { |
| 337 | return m_v_r; |
| 338 | } |
| 339 | |
| 340 | inline const uint16_t gprs_rlc_ul_window::v_q() const |
| 341 | { |
| 342 | return m_v_q; |
| 343 | } |
| 344 | |
Daniel Willmann | 8a31f9e | 2013-11-27 17:08:35 +0100 | [diff] [blame] | 345 | inline const uint16_t gprs_rlc_ul_window::ssn() const |
| 346 | { |
| 347 | return m_v_r; |
| 348 | } |
| 349 | |
Holger Hans Peter Freyther | 7f3e662 | 2013-11-25 23:51:19 +0100 | [diff] [blame] | 350 | inline void gprs_rlc_ul_window::raise_v_r(int moves) |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 351 | { |
| 352 | m_v_r = (m_v_r + moves) & mod_sns(); |
| 353 | } |
| 354 | |
Holger Hans Peter Freyther | 7f3e662 | 2013-11-25 23:51:19 +0100 | [diff] [blame] | 355 | 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] | 356 | { |
| 357 | m_v_q = (m_v_q + incr) & mod_sns(); |
| 358 | } |
Holger Hans Peter Freyther | 270f7fc | 2013-11-24 20:55:02 +0100 | [diff] [blame] | 359 | |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 360 | inline void gprs_rlc_v_n::mark_received(int bsn) |
Holger Hans Peter Freyther | 270f7fc | 2013-11-24 20:55:02 +0100 | [diff] [blame] | 361 | { |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 362 | return mark(bsn, 'R'); |
Holger Hans Peter Freyther | 270f7fc | 2013-11-24 20:55:02 +0100 | [diff] [blame] | 363 | } |
| 364 | |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 365 | inline void gprs_rlc_v_n::mark_missing(int bsn) |
Holger Hans Peter Freyther | 270f7fc | 2013-11-24 20:55:02 +0100 | [diff] [blame] | 366 | { |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 367 | return mark(bsn, 'N'); |
Holger Hans Peter Freyther | 270f7fc | 2013-11-24 20:55:02 +0100 | [diff] [blame] | 368 | } |
| 369 | |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 370 | 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] | 371 | { |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 372 | return is_state(bsn, 'R'); |
Holger Hans Peter Freyther | 270f7fc | 2013-11-24 20:55:02 +0100 | [diff] [blame] | 373 | } |
| 374 | |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 375 | inline bool gprs_rlc_v_n::is_state(int bsn, const char type) const |
Holger Hans Peter Freyther | 270f7fc | 2013-11-24 20:55:02 +0100 | [diff] [blame] | 376 | { |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 377 | return m_v_n[bsn & mod_sns_half()] == type; |
| 378 | } |
| 379 | |
| 380 | inline void gprs_rlc_v_n::mark(int bsn, const char type) |
| 381 | { |
| 382 | m_v_n[bsn & mod_sns_half()] = type; |
| 383 | } |
| 384 | |
| 385 | inline char gprs_rlc_v_n::state(int bsn) const |
| 386 | { |
| 387 | char bit = m_v_n[bsn & mod_sns_half()]; |
Holger Hans Peter Freyther | e9b1ebb | 2013-11-24 22:00:43 +0100 | [diff] [blame] | 388 | if (bit == '\0') |
| 389 | return ' '; |
| 390 | return bit; |
Holger Hans Peter Freyther | 270f7fc | 2013-11-24 20:55:02 +0100 | [diff] [blame] | 391 | } |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 392 | |
| 393 | inline gprs_rlc_data *gprs_rlc::block(int bsn) |
| 394 | { |
| 395 | return &m_blocks[bsn & mod_sns_half()]; |
| 396 | } |