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