table of contents
CANGW(1) | User Commands | CANGW(1) |
NAME¶
cangw - manual page for cangw 2018.02.0-1SYNOPSIS¶
cangw [options]DESCRIPTION¶
cangw - manage PF_CAN netlink gateway.Commands:¶
- -A
- (add a new rule)
- -D
- (delete a rule)
- -F
- (flush / delete all rules)
- -L
- (list all rules)
Mandatory:¶
- -s <src_dev>
- (source netdevice)
- -d <dst_dev>
- (destination netdevice)
OPTIONS¶
- -t
- (preserve src_dev rx timestamp)
- -e
- (echo sent frames - recommended on vcanx)
- -i
- (allow to route to incoming interface)
- -u <uid>
- (user defined modification identifier)
- -l <hops>
- (limit the number of frame hops / routings)
- -f <filter>
- (set CAN filter)
- -m <mod>
- (set frame modifications)
- -x <from_idx>:<to_idx>:<result_idx>:<init_xor_val>
- (XOR checksum)
- -c <from>:<to>:<result>:<init_val>:<xor_val>:<crctab[256]>
- (CRC8 cs)
- -p <profile>:[<profile_data>]
- (CRC8 checksum profile & parameters)
Values are given and expected in hexadecimal values. Leading 0s can be omitted.
<filter> is a <value><mask> CAN identifier filter:¶
- <can_id>:<can_mask>
- (matches when <received_can_id> & mask == can_id & mask)
- <can_id>~<can_mask>
- (matches when <received_can_id> & mask != can_id & mask)
<mod> is a CAN frame modification instruction consisting of <instruction>:<can_frame-elements>:<can_id>.<can_dlc>.<can_data>
- <instruction>
- is one of 'AND' 'OR' 'XOR' 'SET'
- <can_frame-elements>
- is _one_ or _more_ of 'I'dentifier 'L'ength 'D'ata
- <can_id>
- is an u32 value containing the CAN Identifier
- <can_dlc>
- is an u8 value containing the data length code (0 .. 8)
- <can_data>
- is always eight(!) u8 values containing the CAN frames data
The max. four modifications are performed in the order AND -> OR -> XOR -> SET
Supported CRC 8 profiles:¶
- Profile '1' (1U8)
- - add one additional u8 value
- Profile '2' (16U8)
- - add u8 value from table[16] indexed by (data[1] & 0xF)
- Profile '3' (SFFID_XOR)
- - add u8 value (can_id & 0xFF) ^ (can_id >> 8 & 0xFF)
EXAMPLES¶
cangw -A -s can0 -d vcan3 -e -f 123:C00007FF -m SET:IL:333.4.1122334455667788February 2018 | cangw 2018.02.0-1 |