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cangw: add semantic check for checksum options 

The options to for adding checksums (-c or -x) can only be used in conjunction
with modifications (-m) applied to the routed CAN frames.

Signed-off-by: Andre Naujoks <nautsch2@googlemail.com>
Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net>
pull/7/head
Oliver Hartkopp 2012-11-14 20:20:38 +01:00
parent d166ecc8a3
commit f123d73d9a
1 changed files with 5 additions and 0 deletions
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5
cangw.c
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@ -669,6 +669,11 @@ int main(int argc, char **argv)
exit(1); exit(1);
} }
if (!modidx && (have_cs_crc8 || have_cs_xor)) {
printf("-c or -x can only be used in conjunction with -m\n");
exit(1);
}
s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE); s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
switch (cmd) { switch (cmd) {