| /* rlc header descriptions |
| * |
| * Copyright (C) 2012 Ivan Klyuchnikov |
| * Copyright (C) 2012 Andreas Eversberg <jolly@eversberg.eu> |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License |
| * as published by the Free Software Foundation; either version 2 |
| * of the License, or (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| */ |
| #pragma once |
| |
| #include <stdint.h> |
| |
| #define RLC_MAX_SNS 128 /* GPRS, must be power of 2 */ |
| #define RLC_MAX_WS 64 /* max window size */ |
| #define RLC_MAX_LEN 54 /* CS-4 including spare bits */ |
| |
| |
| struct gprs_rlc_data { |
| uint8_t *prepare(size_t block_data_length); |
| |
| /* block history */ |
| uint8_t block[RLC_MAX_LEN]; |
| /* block len of history */ |
| uint8_t len; |
| }; |
| |
| /* |
| * I hold the currently transferred blocks and will provide |
| * the routines to manipulate these arrays. |
| */ |
| struct gprs_rlc { |
| gprs_rlc_data blocks[RLC_MAX_SNS/2]; |
| }; |
| |
| struct gprs_rlc_v_b { |
| bool is_unacked(int index) const; |
| bool is_nacked(int index) const; |
| bool is_acked(int index) const; |
| bool is_resend(int index) const; |
| bool is_invalid(int index) const; |
| |
| char state(int index) const; |
| |
| void mark_unacked(int index); |
| void mark_nacked(int index); |
| void mark_acked(int index); |
| void mark_resend(int index); |
| void mark_invalid(int index); |
| |
| void reset(); |
| |
| private: |
| bool is_state(int index, const char state) const; |
| void mark(int index, const char state); |
| |
| char m_v_b[RLC_MAX_SNS/2]; /* acknowledge state array */ |
| }; |
| |
| |
| extern "C" { |
| /* TS 04.60 10.2.2 */ |
| struct rlc_ul_header { |
| uint8_t r:1, |
| si:1, |
| cv:4, |
| pt:2; |
| uint8_t ti:1, |
| tfi:5, |
| pi:1, |
| spare:1; |
| uint8_t e:1, |
| bsn:7; |
| } __attribute__ ((packed)); |
| |
| struct rlc_dl_header { |
| uint8_t usf:3, |
| s_p:1, |
| rrbp:2, |
| pt:2; |
| uint8_t fbi:1, |
| tfi:5, |
| pr:2; |
| uint8_t e:1, |
| bsn:7; |
| } __attribute__ ((packed)); |
| |
| struct rlc_li_field { |
| uint8_t e:1, |
| m:1, |
| li:6; |
| } __attribute__ ((packed)); |
| } |
| |
| inline bool gprs_rlc_v_b::is_state(int index, const char type) const |
| { |
| return m_v_b[index] == type; |
| } |
| |
| inline void gprs_rlc_v_b::mark(int index, const char type) |
| { |
| m_v_b[index] = type; |
| } |
| |
| inline char gprs_rlc_v_b::state(int index) const |
| { |
| return m_v_b[index]; |
| } |
| |
| inline bool gprs_rlc_v_b::is_nacked(int index) const |
| { |
| return is_state(index, 'N'); |
| } |
| |
| inline bool gprs_rlc_v_b::is_acked(int index) const |
| { |
| return is_state(index, 'A'); |
| } |
| |
| inline bool gprs_rlc_v_b::is_unacked(int index) const |
| { |
| return is_state(index, 'U'); |
| } |
| |
| inline bool gprs_rlc_v_b::is_resend(int index) const |
| { |
| return is_state(index, 'X'); |
| } |
| |
| inline bool gprs_rlc_v_b::is_invalid(int index) const |
| { |
| return is_state(index, 'I'); |
| } |
| |
| inline void gprs_rlc_v_b::mark_resend(int index) |
| { |
| return mark(index, 'X'); |
| } |
| |
| inline void gprs_rlc_v_b::mark_unacked(int index) |
| { |
| return mark(index, 'U'); |
| } |
| |
| inline void gprs_rlc_v_b::mark_acked(int index) |
| { |
| return mark(index, 'A'); |
| } |
| |
| inline void gprs_rlc_v_b::mark_nacked(int index) |
| { |
| return mark(index, 'N'); |
| } |
| |
| inline void gprs_rlc_v_b::mark_invalid(int index) |
| { |
| return mark(index, 'I'); |
| } |