Filter
Top Products
Chapter 2 23
LLA and DLPI Example Programs
DLPI Example Program
/* did we get a control part */
if(ctrl_buf.len) {
/* yup; is it an ERROR_ACK? */
if(err_ack->dl_primitive == DL_ERROR_ACK) {
/* yup; format the ERROR_ACK info */
printf(”error: expected primitive
0x%02x, ”, ex_prim);
printf(”got DL_ERROR_ACK\n”);
printf(” dl_error_primitive =
0x%02x\n”, err_ack->
dl_error_primitive);
printf(” dl_errno = 0x%02x\n”,
err_ack->dl_errno);
printf(” dl_unix_errno = %d\n”,
err_ack->dl_unix_errno);
exit(1);
} else {
/*
didn't get an ERROR_ACK either; print
whatever primitive we did get
*/
printf(”error: expected primitive
0x%02x, ”, ex_prim);
printf(”got primitive 0x%02x\n”,
err_ack->dl_primitive);
exit(1);
}
} else {
/* no control; did we get data? */
if(data_buf.len) {
/* tell user we only got data */
printf(”error: check_ctrl found only
data\n”);
exit(1);
} else {
/*
no message???; well, it was probably an
interrupted system call
*/
printf(”error: check_ctrl found no
message\n”);
exit(1);
}
}
}
}
/*********************************************************************
put a message consisting of only a data part on a stream
*********************************************************************/
void
put_data(fd, length)
int fd; /* file descriptor */
int length; /* length of data message */
{
/* set the len field in the strbuf structure */