diff options
Diffstat (limited to 'include/linux/can/gw.h')
| -rw-r--r-- | include/linux/can/gw.h | 162 |
1 files changed, 0 insertions, 162 deletions
diff --git a/include/linux/can/gw.h b/include/linux/can/gw.h deleted file mode 100644 index 8e1db18c3cb..00000000000 --- a/include/linux/can/gw.h +++ /dev/null @@ -1,162 +0,0 @@ -/* - * linux/can/gw.h - * - * Definitions for CAN frame Gateway/Router/Bridge - * - * Author: Oliver Hartkopp <oliver.hartkopp@volkswagen.de> - * Copyright (c) 2011 Volkswagen Group Electronic Research - * All rights reserved. - * - */ - -#ifndef CAN_GW_H -#define CAN_GW_H - -#include <linux/types.h> -#include <linux/can.h> - -struct rtcanmsg { - __u8 can_family; - __u8 gwtype; - __u16 flags; -}; - -/* CAN gateway types */ -enum { - CGW_TYPE_UNSPEC, - CGW_TYPE_CAN_CAN, /* CAN->CAN routing */ - __CGW_TYPE_MAX -}; - -#define CGW_TYPE_MAX (__CGW_TYPE_MAX - 1) - -/* CAN rtnetlink attribute definitions */ -enum { - CGW_UNSPEC, - CGW_MOD_AND, /* CAN frame modification binary AND */ - CGW_MOD_OR, /* CAN frame modification binary OR */ - CGW_MOD_XOR, /* CAN frame modification binary XOR */ - CGW_MOD_SET, /* CAN frame modification set alternate values */ - CGW_CS_XOR, /* set data[] XOR checksum into data[index] */ - CGW_CS_CRC8, /* set data[] CRC8 checksum into data[index] */ - CGW_HANDLED, /* number of handled CAN frames */ - CGW_DROPPED, /* number of dropped CAN frames */ - CGW_SRC_IF, /* ifindex of source network interface */ - CGW_DST_IF, /* ifindex of destination network interface */ - CGW_FILTER, /* specify struct can_filter on source CAN device */ - __CGW_MAX -}; - -#define CGW_MAX (__CGW_MAX - 1) - -#define CGW_FLAGS_CAN_ECHO 0x01 -#define CGW_FLAGS_CAN_SRC_TSTAMP 0x02 - -#define CGW_MOD_FUNCS 4 /* AND OR XOR SET */ - -/* CAN frame elements that are affected by curr. 3 CAN frame modifications */ -#define CGW_MOD_ID 0x01 -#define CGW_MOD_DLC 0x02 -#define CGW_MOD_DATA 0x04 - -#define CGW_FRAME_MODS 3 /* ID DLC DATA */ - -#define MAX_MODFUNCTIONS (CGW_MOD_FUNCS * CGW_FRAME_MODS) - -struct cgw_frame_mod { - struct can_frame cf; - __u8 modtype; -} __attribute__((packed)); - -#define CGW_MODATTR_LEN sizeof(struct cgw_frame_mod) - -struct cgw_csum_xor { - __s8 from_idx; - __s8 to_idx; - __s8 result_idx; - __u8 init_xor_val; -} __attribute__((packed)); - -struct cgw_csum_crc8 { - __s8 from_idx; - __s8 to_idx; - __s8 result_idx; - __u8 init_crc_val; - __u8 final_xor_val; - __u8 crctab[256]; - __u8 profile; - __u8 profile_data[20]; -} __attribute__((packed)); - -/* length of checksum operation parameters. idx = index in CAN frame data[] */ -#define CGW_CS_XOR_LEN sizeof(struct cgw_csum_xor) -#define CGW_CS_CRC8_LEN sizeof(struct cgw_csum_crc8) - -/* CRC8 profiles (compute CRC for additional data elements - see below) */ -enum { - CGW_CRC8PRF_UNSPEC, - CGW_CRC8PRF_1U8, /* compute one additional u8 value */ - CGW_CRC8PRF_16U8, /* u8 value table indexed by data[1] & 0xF */ - CGW_CRC8PRF_SFFID_XOR, /* (can_id & 0xFF) ^ (can_id >> 8 & 0xFF) */ - __CGW_CRC8PRF_MAX -}; - -#define CGW_CRC8PRF_MAX (__CGW_CRC8PRF_MAX - 1) - -/* - * CAN rtnetlink attribute contents in detail - * - * CGW_XXX_IF (length 4 bytes): - * Sets an interface index for source/destination network interfaces. - * For the CAN->CAN gwtype the indices of _two_ CAN interfaces are mandatory. - * - * CGW_FILTER (length 8 bytes): - * Sets a CAN receive filter for the gateway job specified by the - * struct can_filter described in include/linux/can.h - * - * CGW_MOD_XXX (length 17 bytes): - * Specifies a modification that's done to a received CAN frame before it is - * send out to the destination interface. - * - * <struct can_frame> data used as operator - * <u8> affected CAN frame elements - * - * CGW_CS_XOR (length 4 bytes): - * Set a simple XOR checksum starting with an initial value into - * data[result-idx] using data[start-idx] .. data[end-idx] - * - * The XOR checksum is calculated like this: - * - * xor = init_xor_val - * - * for (i = from_idx .. to_idx) - * xor ^= can_frame.data[i] - * - * can_frame.data[ result_idx ] = xor - * - * CGW_CS_CRC8 (length 282 bytes): - * Set a CRC8 value into data[result-idx] using a given 256 byte CRC8 table, - * a given initial value and a defined input data[start-idx] .. data[end-idx]. - * Finally the result value is XOR'ed with the final_xor_val. - * - * The CRC8 checksum is calculated like this: - * - * crc = init_crc_val - * - * for (i = from_idx .. to_idx) - * crc = crctab[ crc ^ can_frame.data[i] ] - * - * can_frame.data[ result_idx ] = crc ^ final_xor_val - * - * The calculated CRC may contain additional source data elements that can be - * defined in the handling of 'checksum profiles' e.g. shown in AUTOSAR specs - * like http://www.autosar.org/download/R4.0/AUTOSAR_SWS_E2ELibrary.pdf - * E.g. the profile_data[] may contain additional u8 values (called DATA_IDs) - * that are used depending on counter values inside the CAN frame data[]. - * So far only three profiles have been implemented for illustration. - * - * Remark: In general the attribute data is a linear buffer. - * Beware of sending unpacked or aligned structs! - */ - -#endif |