extern int
tcsetattr( int fildes, int optact, const struct termios *termios_p )
{
cyg_file *fp;
int ret;
setattr_struct attr;
int len = sizeof( attr );
CYG_REPORT_FUNCTYPE( "returning %d" );
CYG_REPORT_FUNCARG3( "fildes=%d, optact=%d, termios_p=%08x",
fildes, optact, termios_p );
CYG_CHECK_DATA_PTRC( termios_p );
if ( !isatty(fildes) ) {
errno = ENOTTY;
CYG_REPORT_RETVAL( -1 );
return -1;
}
if ( (optact != TCSANOW) && (optact != TCSADRAIN) &&
(optact != TCSAFLUSH) ) {
errno = EINVAL;
CYG_REPORT_RETVAL( -1 );
return -1;
}
fp = cyg_fp_get( fildes );
if ( NULL == fp ) {
errno = EBADF;
CYG_REPORT_RETVAL( -1 );
return -1;
}
attr.termios_p = termios_p;
attr.optact = optact;
ret = fp->f_ops->fo_setinfo( fp, CYG_IO_SET_CONFIG_TERMIOS, &attr,
len);
cyg_fp_free( fp );
if ( ret > 0 ) {
errno = ret;
CYG_REPORT_RETVAL( -1 );
return -1;
}
CYG_REPORT_RETVAL( 0 );
return 0;
} // tcsetattr()
externC void cyg_drv_interrupt_configure(
cyg_vector_t vector,
cyg_bool_t level,
cyg_bool_t up
)
{
CYG_REPORT_FUNCTION();
CYG_REPORT_FUNCARG3("vector = %d, level = %d, up = %d", vector, level,
up);
CYG_ASSERT( vector >= CYGNUM_HAL_ISR_MIN, "Invalid vector");
CYG_ASSERT( vector <= CYGNUM_HAL_ISR_MAX, "Invalid vector");
HAL_INTERRUPT_CONFIGURE( vector, level, up );
CYG_REPORT_RETURN();
}
/* Send the query to the server and read the response back. Return -1
if it fails, otherwise put the response back in msg and return the
length of the response. */
static int
send_recv(char * msg, int len, int msglen)
{
struct dns_header *dns_hdr;
struct timeval timeout;
int finished = false;
int backoff = 2;
fd_set readfds;
int written;
int ret;
CYG_REPORT_FUNCNAMETYPE( "send_recv", "returning %d" );
CYG_REPORT_FUNCARG3( "msg=%08x, len=%d, msglen", msg, len, msglen );
CYG_CHECK_DATA_PTR( msg, "msg is not a valid pointer!" );
dns_hdr = (struct dns_header *) msg;
do {
written = write(s, msg, len);
if (written < 0 || (written!=len)) {
ret = -1;
break;
}
FD_ZERO(&readfds);
FD_SET(s, &readfds);
timeout.tv_sec = backoff;
timeout.tv_usec = 0;
backoff = backoff << 1;
ret = select(s+1, &readfds, NULL, NULL, &timeout);
if (ret < 0) {
ret = -1;
break;
}
/* Timeout */
if (ret == 0) {
if (backoff > 16) {
h_errno = TRY_AGAIN;
ret = -1;
break;
}
}
if (ret == 1) {
ret = read(s, msg, msglen);
if (ret < 0) {
ret = -1;
break;
}
/* Reply to an old query. Ignore it */
if (ntohs(dns_hdr->id) != (id-1)) {
continue;
}
finished = true;
}
} while (!finished);
CYG_REPORT_RETVAL( ret );
return ret;
}
