LLA and DLPI Example Programs
DLPI Example Program
/* did we get a control part */ if(ctrl_buf.len) {
/* yup; is it an ERROR_ACK? */
0x%02x, ”, ex_prim);
printf(”got DL_ERROR_ACK\n”); printf(” dl_error_primitive =
0x%02x\n”,
printf(” dl_errno = 0x%02x\n”,
printf(” dl_unix_errno = %d\n”,
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”,
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 |
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put_data(fd, length) |
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int | fd; | /* file descriptor */ |
int | length; | /* length of data message */ |
{ |
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/* set the len field in the strbuf structure */
Chapter 2 | 23 |