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165 lines
6.4 KiB
165 lines
6.4 KiB
/* SPDX-License-Identifier: ((GPL-2.0-only WITH Linux-syscall-note) OR BSD-3-Clause) */ |
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/* |
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* linux/can/isotp.h |
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* |
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* Definitions for isotp CAN sockets (ISO 15765-2:2016) |
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* |
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* Copyright (c) 2020 Volkswagen Group Electronic Research |
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* All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* 3. Neither the name of Volkswagen nor the names of its contributors |
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* may be used to endorse or promote products derived from this software |
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* without specific prior written permission. |
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* |
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* Alternatively, provided that this notice is retained in full, this |
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* software may be distributed under the terms of the GNU General |
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* Public License ("GPL") version 2, in which case the provisions of the |
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* GPL apply INSTEAD OF those given above. |
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* |
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* The provided data structures and external interfaces from this code |
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* are not restricted to be used by modules with a GPL compatible license. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH |
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* DAMAGE. |
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*/ |
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#ifndef _UAPI_CAN_ISOTP_H |
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#define _UAPI_CAN_ISOTP_H |
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#include <linux/types.h> |
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#include <linux/can.h> |
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#define SOL_CAN_ISOTP (SOL_CAN_BASE + CAN_ISOTP) |
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/* for socket options affecting the socket (not the global system) */ |
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#define CAN_ISOTP_OPTS 1 /* pass struct can_isotp_options */ |
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#define CAN_ISOTP_RECV_FC 2 /* pass struct can_isotp_fc_options */ |
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/* sockopts to force stmin timer values for protocol regression tests */ |
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#define CAN_ISOTP_TX_STMIN 3 /* pass __u32 value in nano secs */ |
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/* use this time instead of value */ |
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/* provided in FC from the receiver */ |
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#define CAN_ISOTP_RX_STMIN 4 /* pass __u32 value in nano secs */ |
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/* ignore received CF frames which */ |
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/* timestamps differ less than val */ |
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#define CAN_ISOTP_LL_OPTS 5 /* pass struct can_isotp_ll_options */ |
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struct can_isotp_options { |
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__u32 flags; /* set flags for isotp behaviour. */ |
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/* __u32 value : flags see below */ |
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__u32 frame_txtime; /* frame transmission time (N_As/N_Ar) */ |
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/* __u32 value : time in nano secs */ |
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__u8 ext_address; /* set address for extended addressing */ |
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/* __u8 value : extended address */ |
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__u8 txpad_content; /* set content of padding byte (tx) */ |
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/* __u8 value : content on tx path */ |
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__u8 rxpad_content; /* set content of padding byte (rx) */ |
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/* __u8 value : content on rx path */ |
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__u8 rx_ext_address; /* set address for extended addressing */ |
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/* __u8 value : extended address (rx) */ |
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}; |
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struct can_isotp_fc_options { |
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__u8 bs; /* blocksize provided in FC frame */ |
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/* __u8 value : blocksize. 0 = off */ |
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__u8 stmin; /* separation time provided in FC frame */ |
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/* __u8 value : */ |
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/* 0x00 - 0x7F : 0 - 127 ms */ |
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/* 0x80 - 0xF0 : reserved */ |
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/* 0xF1 - 0xF9 : 100 us - 900 us */ |
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/* 0xFA - 0xFF : reserved */ |
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__u8 wftmax; /* max. number of wait frame transmiss. */ |
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/* __u8 value : 0 = omit FC N_PDU WT */ |
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}; |
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struct can_isotp_ll_options { |
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__u8 mtu; /* generated & accepted CAN frame type */ |
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/* __u8 value : */ |
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/* CAN_MTU (16) -> standard CAN 2.0 */ |
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/* CANFD_MTU (72) -> CAN FD frame */ |
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__u8 tx_dl; /* tx link layer data length in bytes */ |
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/* (configured maximum payload length) */ |
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/* __u8 value : 8,12,16,20,24,32,48,64 */ |
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/* => rx path supports all LL_DL values */ |
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__u8 tx_flags; /* set into struct canfd_frame.flags */ |
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/* at frame creation: e.g. CANFD_BRS */ |
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/* Obsolete when the BRS flag is fixed */ |
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/* by the CAN netdriver configuration */ |
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}; |
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/* flags for isotp behaviour */ |
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#define CAN_ISOTP_LISTEN_MODE 0x001 /* listen only (do not send FC) */ |
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#define CAN_ISOTP_EXTEND_ADDR 0x002 /* enable extended addressing */ |
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#define CAN_ISOTP_TX_PADDING 0x004 /* enable CAN frame padding tx path */ |
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#define CAN_ISOTP_RX_PADDING 0x008 /* enable CAN frame padding rx path */ |
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#define CAN_ISOTP_CHK_PAD_LEN 0x010 /* check received CAN frame padding */ |
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#define CAN_ISOTP_CHK_PAD_DATA 0x020 /* check received CAN frame padding */ |
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#define CAN_ISOTP_HALF_DUPLEX 0x040 /* half duplex error state handling */ |
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#define CAN_ISOTP_FORCE_TXSTMIN 0x080 /* ignore stmin from received FC */ |
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#define CAN_ISOTP_FORCE_RXSTMIN 0x100 /* ignore CFs depending on rx stmin */ |
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#define CAN_ISOTP_RX_EXT_ADDR 0x200 /* different rx extended addressing */ |
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#define CAN_ISOTP_WAIT_TX_DONE 0x400 /* wait for tx completion */ |
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#define CAN_ISOTP_SF_BROADCAST 0x800 /* 1-to-N functional addressing */ |
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/* default values */ |
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#define CAN_ISOTP_DEFAULT_FLAGS 0 |
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#define CAN_ISOTP_DEFAULT_EXT_ADDRESS 0x00 |
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#define CAN_ISOTP_DEFAULT_PAD_CONTENT 0xCC /* prevent bit-stuffing */ |
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#define CAN_ISOTP_DEFAULT_FRAME_TXTIME 0 |
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#define CAN_ISOTP_DEFAULT_RECV_BS 0 |
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#define CAN_ISOTP_DEFAULT_RECV_STMIN 0x00 |
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#define CAN_ISOTP_DEFAULT_RECV_WFTMAX 0 |
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#define CAN_ISOTP_DEFAULT_LL_MTU CAN_MTU |
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#define CAN_ISOTP_DEFAULT_LL_TX_DL CAN_MAX_DLEN |
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#define CAN_ISOTP_DEFAULT_LL_TX_FLAGS 0 |
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/* |
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* Remark on CAN_ISOTP_DEFAULT_RECV_* values: |
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* |
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* We can strongly assume, that the Linux Kernel implementation of |
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* CAN_ISOTP is capable to run with BS=0, STmin=0 and WFTmax=0. |
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* But as we like to be able to behave as a commonly available ECU, |
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* these default settings can be changed via sockopts. |
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* For that reason the STmin value is intentionally _not_ checked for |
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* consistency and copied directly into the flow control (FC) frame. |
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*/ |
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#endif /* !_UAPI_CAN_ISOTP_H */
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