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tox_file_send_chunk() must now send data the same length as requested

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in the requested chunk callback.

For zero size transfers if the data sent is not the same length, the
file is assumed to be done.
This commit is contained in:
irungentoo 2015-03-13 12:40:21 -04:00
parent eec1042695
commit 669975c226
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GPG Key ID: 10349DC9BED89E98
4 changed files with 44 additions and 27 deletions
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44
toxcore/Messenger.c
View File

@ -1196,6 +1196,28 @@ int file_control(const Messenger *m, int32_t friendnumber, uint32_t filenumber,
return 0;
}
/* return packet number on success.
* return -1 on failure.
*/
static int64_t send_file_data_packet(const Messenger *m, int32_t friendnumber, uint8_t filenumber, const uint8_t *data,
uint16_t length)
{
if (friend_not_valid(m, friendnumber))
return -1;
uint8_t packet[2 + length];
packet[0] = PACKET_ID_FILE_DATA;
packet[1] = filenumber;
if (length) {
memcpy(packet + 2, data, length);
}
return write_cryptpacket(m->net_crypto, friend_connection_crypt_connection_id(m->fr_c,
m->friendlist[friendnumber].friendcon_id), packet, sizeof(packet), 1);
}
#define MAX_FILE_DATA_SIZE (MAX_CRYPTO_DATA_SIZE - 2)
#define MIN_SLOTS_FREE (CRYPTO_MIN_QUEUE_LENGTH / 4)
/* Send file data.
*
@ -1204,7 +1226,7 @@ int file_control(const Messenger *m, int32_t friendnumber, uint32_t filenumber,
* return -2 if friend not online.
* return -3 if filenumber invalid.
* return -4 if file transfer not transferring.
* return -5 if trying to send too much data.
* return -5 if bad data size.
* return -6 if packet queue full.
* return -7 if wrong position.
*/
@ -1228,13 +1250,17 @@ int file_data(const Messenger *m, int32_t friendnumber, uint32_t filenumber, uin
if (ft->paused != FILE_PAUSE_NOT)
return -4;
if (length > MAX_CRYPTO_DATA_SIZE - 2)
if (length > MAX_FILE_DATA_SIZE)
return -5;
if (ft->size) {
if (ft->size - ft->transferred < length) {
return -5;
}
if (length != MAX_FILE_DATA_SIZE && (ft->transferred + length) != ft->size) {
return -5;
}
}
if (position != ft->transferred) {
@ -1246,13 +1272,7 @@ int file_data(const Messenger *m, int32_t friendnumber, uint32_t filenumber, uin
m->friendlist[friendnumber].friendcon_id)) < MIN_SLOTS_FREE)
return -6;
uint8_t packet[2 + length];
packet[0] = PACKET_ID_FILE_DATA;
packet[1] = filenumber;
memcpy(packet + 2, data, length);
int64_t ret = write_cryptpacket(m->net_crypto, friend_connection_crypt_connection_id(m->fr_c,
m->friendlist[friendnumber].friendcon_id), packet, sizeof(packet), 1);
int64_t ret = send_file_data_packet(m, friendnumber, filenumber, data, length);
if (ret != -1) {
//TODO record packet ids to check if other received complete file.
@ -1262,7 +1282,7 @@ int file_data(const Messenger *m, int32_t friendnumber, uint32_t filenumber, uin
--ft->slots_allocated;
}
if (length == 0 || ft->size == ft->transferred) {
if (length != MAX_FILE_DATA_SIZE || ft->size == ft->transferred) {
ft->status = FILESTATUS_FINISHED;
ft->last_packet_number = ret;
}
@ -1346,7 +1366,7 @@ static void do_reqchunk_filecb(Messenger *m, int32_t friendnumber)
if (free_slots == 0)
break;
uint16_t length = MAX_CRYPTO_DATA_SIZE - 2;
uint16_t length = MAX_FILE_DATA_SIZE;
if (ft->size) {
if (ft->size == ft->requested) {
@ -1980,7 +2000,7 @@ static int handle_packet(void *object, int i, uint8_t *temp, uint16_t len)
ft->transferred += file_data_length;
if (ft->size && ft->transferred >= ft->size) {
if ((ft->size && ft->transferred >= ft->size) || file_data_length != MAX_FILE_DATA_SIZE) {
file_data_length = 0;
file_data = NULL;
position = ft->transferred;

2
toxcore/Messenger.h
View File

@ -637,7 +637,7 @@ int file_control(const Messenger *m, int32_t friendnumber, uint32_t filenumber,
* return -2 if friend not online.
* return -3 if filenumber invalid.
* return -4 if file transfer not transferring.
* return -5 if trying to send too much data.
* return -5 if bad data size.
* return -6 if packet queue full.
* return -7 if wrong position.
*/

2
toxcore/tox.c
View File

@ -960,7 +960,7 @@ bool tox_file_send_chunk(Tox *tox, uint32_t friend_number, uint32_t file_number,
return 0;
case -5:
SET_ERROR_PARAMETER(error, TOX_ERR_FILE_SEND_CHUNK_TOO_LARGE);
SET_ERROR_PARAMETER(error, TOX_ERR_FILE_SEND_CHUNK_INVALID_LENGTH);
return 0;
case -6:

23
toxcore/tox.h
View File

@ -1645,11 +1645,11 @@ typedef enum TOX_ERR_FILE_SEND_CHUNK {
*/
TOX_ERR_FILE_SEND_CHUNK_NOT_TRANSFERRING,
/**
* Attempted to send more data than requested. The requested data size is
* Attempted to send more or less data than requested. The requested data size is
* adjusted according to maximum transmission unit and the expected end of
* the file. Trying to send more will result in no data being sent.
* the file. Trying to send less or more than requested will return this error.
*/
TOX_ERR_FILE_SEND_CHUNK_TOO_LARGE,
TOX_ERR_FILE_SEND_CHUNK_INVALID_LENGTH,
/**
* Packet queue is full.
*/
@ -1664,12 +1664,12 @@ typedef enum TOX_ERR_FILE_SEND_CHUNK {
* Send a chunk of file data to a friend.
*
* This function is called in response to the `file_request_chunk` callback. The
* length parameter should be equal to or less than the one received though the
* callback. If it is zero, the transfer is assumed complete. For files with
* known size, Core will know that the transfer is complete after the last byte
* has been received, so it is not necessary (though not harmful) to send a
* zero-length chunk to terminate. For streams, it is necessary for the last
* chunk sent to be zero-length.
* length parameter should be equal to the one received though the callback.
* If it is zero, the transfer is assumed complete. For files with known size,
* Core will know that the transfer is complete after the last byte has been
* received, so it is not necessary (though not harmful) to send a zero-length
* chunk to terminate. For streams, core will know that the transfer is finished
* if a chunk with length less than the length requested in the callback is sent.
*
* @return true on success.
*/
@ -1694,10 +1694,7 @@ bool tox_file_send_chunk(Tox *tox, uint32_t friend_number, uint32_t file_number,
* In response to receiving this callback, the client should call the function
* `tox_file_send_chunk` with the requested chunk. If the number of bytes sent
* through that function is zero, the file transfer is assumed complete. A
* client may choose to send less than requested, if it is reading from a
* stream that doesn't have more data, yet, and it still wants to send some
* data to the other side. However, this will generally be less efficient than
* waiting for a full chunk size of data to be ready.
* client must send the full length of data requested with this callback.
*
* @param friend_number The friend number of the receiving friend for this file.
* @param file_number The file transfer identifier returned by tox_file_send.