/**
* Deliver formatted string
*
* @v intf Data transfer interface
* @v format Format string
* @v args Arguments corresponding to the format string
* @ret rc Return status code
*/
int xfer_vprintf ( struct interface *intf, const char *format,
va_list args ) {
va_list args_tmp;
char *buf;
int len;
int rc;
/* Create temporary string */
va_copy ( args_tmp, args );
len = vasprintf ( &buf, format, args );
if ( len < 0 ) {
rc = len;
goto err_asprintf;
}
va_end ( args_tmp );
/* Transmit string */
if ( ( rc = xfer_deliver_raw ( intf, buf, len ) ) != 0 )
goto err_deliver;
err_deliver:
free ( buf );
err_asprintf:
return rc;
}
static void hw_step ( struct hw *hw ) {
int rc;
if ( xfer_window ( &hw->xfer ) ) {
rc = xfer_deliver_raw ( &hw->xfer, hw_msg, sizeof ( hw_msg ) );
hw_finished ( hw, rc );
}
}
/**
* Send next packet in DNS request
*
* @v dns DNS request
*/
static int dns_send_packet ( struct dns_request *dns ) {
static unsigned int qid = 0;
size_t qlen;
/* Increment query ID */
dns->query.dns.id = htons ( ++qid );
DBGC ( dns, "DNS %p sending query ID %d\n", dns, qid );
/* Start retransmission timer */
start_timer ( &dns->timer );
/* Send the data */
qlen = ( ( ( void * ) dns->qinfo ) - ( ( void * ) &dns->query )
+ sizeof ( dns->qinfo ) );
return xfer_deliver_raw ( &dns->socket, &dns->query, qlen );
}