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cangw: Update help text to indicate len8_dlc support 

The can_dlc value that is passed to the kernel is not sanitized in cangw
therefore we only update the help text.

In the case that the CAN interface supports len8_dlc by setting
CAN_CTRLMODE_CC_LEN8_DLC the can-gw module can modify the full DLC value
range (0 .. 15) for Classic CAN frames.

Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net>
pull/260/head
Oliver Hartkopp 2020-11-18 15:07:33 +01:00
parent 76285153b9
commit eec76a7443
1 changed files with 3 additions and 3 deletions
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cangw.c
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@ -240,7 +240,7 @@ void print_usage(char *prg)
fprintf(stderr, " -u <uid> (user defined modification identifier)\n");
fprintf(stderr, " -l <hops> (limit the number of frame hops / routings)\n");
fprintf(stderr, " -f <filter> (set CAN filter)\n");
fprintf(stderr, " -m <mod> (set Classic CAN frame modifications)\n");
fprintf(stderr, " -m <mod> (set Classical CAN frame modifications)\n");
fprintf(stderr, " -M <MOD> (set CAN FD frame modifications)\n");
fprintf(stderr, " -x <from_idx>:<to_idx>:<result_idx>:<init_xor_val> (XOR checksum)\n");
fprintf(stderr, " -c <from>:<to>:<result>:<init_val>:<xor_val>:<crctab[256]> (CRC8 cs)\n");
@ -251,12 +251,12 @@ void print_usage(char *prg)
fprintf(stderr, " <can_id>:<can_mask> (matches when <received_can_id> & mask == can_id & mask)\n");
fprintf(stderr, " <can_id>~<can_mask> (matches when <received_can_id> & mask != can_id & mask)\n");
fprintf(stderr, "\n");
fprintf(stderr, "<mod> is a CAN frame modification instruction consisting of\n");
fprintf(stderr, "<mod> is a Classical CAN frame modification instruction consisting of\n");
fprintf(stderr, "<instruction>:<can_frame-elements>:<can_id>.<can_dlc>.<can_data>\n");
fprintf(stderr, " <instruction> is one of 'AND' 'OR' 'XOR' 'SET'\n");
fprintf(stderr, " <can_frame-elements> is _one_ or _more_ of 'I'dentifier 'L'ength 'D'ata\n");
fprintf(stderr, " <can_id> is an u32 value containing the CAN Identifier\n");
fprintf(stderr, " <can_dlc> is an u8 value containing the data length code (0 .. 8)\n");
fprintf(stderr, " <can_dlc> is an u8 value containing the data length code (0 .. 15)\n");
fprintf(stderr, " <can_data> is always eight(!) u8 values containing the CAN frames data\n");
fprintf(stderr, "\n");
fprintf(stderr, "<MOD> is a CAN FD frame modification instruction consisting of\n");