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