DWORD buffer_size;
/**
- * Amount of data written, is compared to buffer_size.
+ * Amount of data actually written or read by readfile/writefile.
+ */
+ DWORD buffer_size_processed;
+
+ /**
+ * How much of this buffer we have writte in total
*/
DWORD buffer_size_written;
};
output_facility->facility_state = IOSTATE_READY;
}
else if (0 < input_facility->buffer_size)
- { /* If we have have read our buffer, wait for our write-partner*/
+ /* If we have have read our buffer, wait for our write-partner*/
input_facility->facility_state = IOSTATE_WAITING;
- // TODO: shall we attempt to fill our buffer or should we wait for our write-partner to finish?
- }
}
else /* operation was either queued or failed*/
{
struct io_facility * output_facility)
{
struct GNUNET_MessageHeader * hdr;
- BOOL status;
+
switch (input_facility->facility_state)
{
case IOSTATE_READY:
{
+ input_facility->buffer_size = 0;
+
+partial_read_iostate_ready:
if (! ResetEvent (input_facility->overlapped.hEvent))
return FALSE;
- input_facility->buffer_size = 0;
- status = ReadFile (input_facility->handle,
- input_facility->buffer,
- sizeof (input_facility->buffer),
- &input_facility->buffer_size,
- &input_facility->overlapped);
-
+
/* Check how the task is handled */
- if (status && (sizeof (struct GNUNET_MessageHeader) < input_facility->buffer_size))
+ if (ReadFile (input_facility->handle,
+ input_facility->buffer + input_facility->buffer_size,
+ sizeof (input_facility->buffer) - input_facility->buffer_size,
+ &input_facility->buffer_size_processed,
+ &input_facility->overlapped))
{/* async event processed immediately*/
hdr = (struct GNUNET_MessageHeader *) input_facility->buffer;
/* reset event manually*/
- if (! SetEvent (input_facility->overlapped.hEvent))
+ if (!SetEvent (input_facility->overlapped.hEvent))
return FALSE;
fprintf (stderr, "DEBUG: stdin read succeeded immediately\n");
-
+ input_facility->buffer_size += input_facility->buffer_size_processed;
+
if (ntohs (hdr->type) != GNUNET_MESSAGE_TYPE_VPN_HELPER ||
ntohs (hdr->size) > sizeof (input_facility->buffer))
{
input_facility->facility_state = IOSTATE_READY;
return TRUE;
}
- if (ntohs (hdr->size) > input_facility->buffer_size);
- // TODO: add support for partial read
-
- /* we successfully read something from the TAP and now need to
+ /* we got the a part of a packet */
+ if (ntohs (hdr->size) > input_facility->buffer_size)
+ goto partial_read_iostate_ready;
+
+ /* have we read more than 0 bytes of payload? (sizeread > header)*/
+ if (input_facility->buffer_size > sizeof (struct GNUNET_MessageHeader) &&
+ ((IOSTATE_READY == output_facility->facility_state) ||
+ (IOSTATE_WAITING == output_facility->facility_state)))
+ {/* we successfully read something from the TAP and now need to
* send it our via STDOUT. Is that possible at the moment? */
- if (sizeof (struct GNUNET_MessageHeader) < input_facility->buffer_size)
- {
- if (IOSTATE_READY == output_facility->facility_state ||
- IOSTATE_WAITING == output_facility->facility_state)
- {
- /* hand over this buffers content and strip gnunet message header */
- memcpy (output_facility->buffer,
- input_facility->buffer + sizeof (struct GNUNET_MessageHeader),
- input_facility->buffer_size - sizeof (struct GNUNET_MessageHeader));
- output_facility->buffer_size = input_facility->buffer_size - sizeof (struct GNUNET_MessageHeader);
- output_facility->facility_state = IOSTATE_READY;
-
- }
- else if (IOSTATE_QUEUED == output_facility->facility_state)
- /* If we have have read our buffer, wait for our write-partner*/
- input_facility->facility_state = IOSTATE_WAITING;
- // TODO: shall we attempt to fill our buffer or should we wait for our write-partner to finish?
- }
- }
- else if (status && 0 >= input_facility->buffer_size)
- {
- if (! SetEvent (input_facility->overlapped.hEvent))
- return FALSE;
- input_facility->facility_state = IOSTATE_READY;
- }
+ /* hand over this buffers content and strip gnunet message header */
+ memcpy (output_facility->buffer,
+ input_facility->buffer + sizeof (struct GNUNET_MessageHeader),
+ input_facility->buffer_size - sizeof (struct GNUNET_MessageHeader));
+ output_facility->buffer_size = input_facility->buffer_size - sizeof (struct GNUNET_MessageHeader);
+ output_facility->facility_state = IOSTATE_READY;
+ input_facility->facility_state = IOSTATE_READY;
+ }
+ else if (input_facility->buffer_size > sizeof (struct GNUNET_MessageHeader))
+ /* If we have have read our buffer, wait for our write-partner*/
+ input_facility->facility_state = IOSTATE_WAITING;
+ else /* we read nothing */
+ input_facility->facility_state = IOSTATE_READY;
+ }
else /* operation was either queued or failed*/
{
int err = GetLastError ();
- if (ERROR_IO_PENDING == err)
- { /* operation queued */
+ if (ERROR_IO_PENDING == err) /* operation queued */
input_facility->facility_state = IOSTATE_QUEUED;
- }
else
{ /* error occurred, let the rest of the elements finish */
input_facility->path_open = FALSE;
// there was an operation going on already, check if that has completed now.
if (GetOverlappedResult (input_facility->handle,
&input_facility->overlapped,
- &input_facility->buffer_size,
+ &input_facility->buffer_size_processed,
FALSE))
{/* successful return for a queued operation */
hdr = (struct GNUNET_MessageHeader *) input_facility->buffer;
return FALSE;
fprintf (stderr, "DEBUG: stdin read succeeded delayed\n");
+ input_facility->buffer_size += input_facility->buffer_size_processed;
if ((ntohs (hdr->type) != GNUNET_MESSAGE_TYPE_VPN_HELPER) ||
(ntohs (hdr->size) > sizeof (input_facility->buffer)))
input_facility->facility_state = IOSTATE_READY;
return TRUE;
}
+ /* we got the a part of a packet */
if (ntohs (hdr->size) > input_facility->buffer_size );
- // TODO: add support for partial read
+ goto partial_read_iostate_ready;
/* we successfully read something from the TAP and now need to
* send it our via STDOUT. Is that possible at the moment? */
if ((IOSTATE_READY == output_facility->facility_state ||
IOSTATE_WAITING == output_facility->facility_state)
- && sizeof(struct GNUNET_MessageHeader) < input_facility->buffer_size)
+ && input_facility->buffer_size > sizeof(struct GNUNET_MessageHeader))
{ /* hand over this buffers content and strip gnunet message header */
memcpy (output_facility->buffer,
input_facility->buffer + sizeof(struct GNUNET_MessageHeader),
output_facility->facility_state = IOSTATE_READY;
input_facility->facility_state = IOSTATE_READY;
}
- else if (sizeof(struct GNUNET_MessageHeader) < input_facility->buffer_size)
- { /* If we have have read our buffer, wait for our write-partner*/
- input_facility->facility_state = IOSTATE_WAITING;
- // TODO: shall we attempt to fill our buffer or should we wait for our write-partner to finish?
- }
- else if (sizeof(struct GNUNET_MessageHeader) >= input_facility->buffer_size)
+ else if (input_facility->buffer_size > sizeof(struct GNUNET_MessageHeader))
+ input_facility->facility_state = IOSTATE_WAITING;
+ else
input_facility->facility_state = IOSTATE_READY;
}
else
attempt_write (struct io_facility * output_facility,
struct io_facility * input_facility)
{
- BOOL status;
-
switch (output_facility->facility_state)
{
case IOSTATE_READY:
-
+ output_facility->buffer_size_written = 0;
+
+continue_partial_write:
if (! ResetEvent (output_facility->overlapped.hEvent))
return FALSE;
- output_facility->buffer_size_written = 0;
- status = WriteFile (output_facility->handle,
- output_facility->buffer,
- output_facility->buffer_size,
- &output_facility->buffer_size_written,
- &output_facility->overlapped);
-
/* Check how the task was handled */
- if (status &&
- output_facility->buffer_size_written == output_facility->buffer_size)
+ if (WriteFile (output_facility->handle,
+ output_facility->buffer + output_facility->buffer_size_written,
+ output_facility->buffer_size - output_facility->buffer_size_written,
+ &output_facility->buffer_size_processed,
+ &output_facility->overlapped))
{/* async event processed immediately*/
fprintf (stderr, "DEBUG: write succeeded immediately\n");
+ output_facility->buffer_size_written += output_facility->buffer_size_processed;
/* reset event manually*/
if (! SetEvent (output_facility->overlapped.hEvent))
return FALSE;
+ /* partial write */
+ if (output_facility->buffer_size_written < output_facility->buffer_size)
+ goto continue_partial_write;
+
/* we are now waiting for our buffer to be filled*/
output_facility->facility_state = IOSTATE_WAITING;
- output_facility->buffer_size = 0;
- output_facility->buffer_size_written = 0;
/* we successfully wrote something and now need to reset our reader */
if (IOSTATE_WAITING == input_facility->facility_state)
return TRUE;
case IOSTATE_QUEUED:
// there was an operation going on already, check if that has completed now.
- status = GetOverlappedResult (output_facility->handle,
+
+ if (GetOverlappedResult (output_facility->handle,
&output_facility->overlapped,
- &output_facility->buffer_size_written,
- FALSE);
- if (status &&
- output_facility->buffer_size_written == output_facility->buffer_size)
+ &output_facility->buffer_size_processed,
+ FALSE))
{/* successful return for a queued operation */
if (! ResetEvent (output_facility->overlapped.hEvent))
return FALSE;
fprintf (stderr, "DEBUG: write succeeded delayed\n");
-
+ output_facility->buffer_size_written += output_facility->buffer_size_processed;
+
+ /* partial write */
+ if (output_facility->buffer_size_written < output_facility->buffer_size)
+ goto continue_partial_write;
+
/* we are now waiting for our buffer to be filled*/
output_facility->facility_state = IOSTATE_WAITING;
- output_facility->buffer_size = 0;
- output_facility->buffer_size_written = 0;
/* we successfully wrote something and now need to reset our reader */
if (IOSTATE_WAITING == input_facility->facility_state)
projects / oweals / gnunet.git / blobdiff