linux/can/gw.h

1 /* SPDX-License-Identifier: ((GPL-2.0-only WITH Linux-syscall-note) OR BSD-3-Clause) */
5  * Definitions for CAN frame Gateway/Router/Bridge
60 	CGW_TYPE_CAN_CAN,	/* CAN->CAN routing */
64 #define CGW_TYPE_MAX (__CGW_TYPE_MAX - 1)
69 	CGW_MOD_AND,	/* CAN frame modification binary AND */
70 	CGW_MOD_OR,	/* CAN frame modification binary OR */
71 	CGW_MOD_XOR,	/* CAN frame modification binary XOR */
72 	CGW_MOD_SET,	/* CAN frame modification set alternate values */
75 	CGW_HANDLED,	/* number of handled CAN frames */
76 	CGW_DROPPED,	/* number of dropped CAN frames */
80 	CGW_DELETED,	/* number of deleted CAN frames (see max_hops param) */
81 	CGW_LIM_HOPS,	/* limit the number of hops of this specific rule */
83 	CGW_FDMOD_AND,	/* CAN FD frame modification binary AND */
84 	CGW_FDMOD_OR,	/* CAN FD frame modification binary OR */
85 	CGW_FDMOD_XOR,	/* CAN FD frame modification binary XOR */
86 	CGW_FDMOD_SET,	/* CAN FD frame modification set alternate values */
90 #define CGW_MAX (__CGW_MAX - 1)
99 /* CAN frame elements that are affected by curr. 3 CAN frame modifications */
141 /* length of checksum operation parameters. idx = index in CAN frame data[] */
145 /* CRC8 profiles (compute CRC for additional data elements - see below) */
154 #define CGW_CRC8PRF_MAX (__CGW_CRC8PRF_MAX - 1)
161  * For the CAN->CAN gwtype the indices of _two_ CAN interfaces are mandatory.
168  * Specifies a modification that's done to a received CAN frame before it is
172  * <u8> affected CAN frame elements
175  * Limit the number of hops of this specific rule. Usually the received CAN
176  * frame can be processed as much as 'max_hops' times (which is given at module
177  * load time of the can-gw module). This value is used to reduce the number of
181  * Optional non-zero user defined routing job identifier to alter existing
186  * data[result-idx] using data[start-idx] .. data[end-idx]
198  * Set a CRC8 value into data[result-idx] using a given 256 byte CRC8 table,
199  * a given initial value and a defined input data[start-idx] .. data[end-idx].
215  * that are used depending on counter values inside the CAN frame data[].