Hi Kurt,

I am back working a little my gw.

As the defined in the j1939-21 the maximum dlc is 1785. 

static struct {
	int pkt_len;
} s = {
	.pkt_len = 1024,
};

buf = malloc(s.pkt_len);

recvmsg(sockfd, &msg, 0);


Did I get that right, that a dlc more than 1024 bytes is not possible with
recvmsg or sendmsg. For my application I won't need so many data but for
understanding the code!

Kind regards,
Wolfgang