void getCurrentDate(DateTime *date)
{
//Retrieve current time
time_t time = getCurrentUnixTime();
//Convert Unix timestamp to date
convertUnixTimeToDate(time, date);
}
void ftpServerSendData(FtpServerContext *context, FtpClientConnection *connection)
{
error_t error;
size_t n;
//Any data waiting for transmission?
if(connection->bufferLength > 0)
{
//Send more data
error = socketSend(connection->dataSocket, connection->buffer +
connection->bufferPos, connection->bufferLength, &n, 0);
//Failed to send data?
if(error != NO_ERROR && error != ERROR_TIMEOUT)
{
//Close the data connection
ftpServerCloseDataConnection(connection);
//Release previously allocated resources
if(connection->file != NULL)
{
fsCloseFile(connection->file);
connection->file = NULL;
}
if(connection->dir != NULL)
{
fsCloseDir(connection->dir);
connection->dir = NULL;
}
//Back to idle state
connection->controlState = FTP_CONTROL_STATE_IDLE;
//Transfer status
strcpy(connection->response, "451 Transfer aborted\r\n");
//Debug message
TRACE_DEBUG("FTP server: %s", connection->response);
//Number of bytes in the response buffer
connection->responseLength = strlen(connection->response);
connection->responsePos = 0;
//Exit immediately
return;
}
//Advance data pointer
connection->bufferPos += n;
//Number of bytes still available in the buffer
connection->bufferLength -= n;
}
//Empty transmission buffer?
if(connection->bufferLength == 0)
{
//File transfer in progress?
if(connection->controlState == FTP_CONTROL_STATE_RETR)
{
//Read more data
error = fsReadFile(connection->file,
connection->buffer, FTP_SERVER_BUFFER_SIZE, &n);
//End of stream?
if(error)
{
//Close file
fsCloseFile(connection->file);
connection->file = NULL;
//Wait for all the data to be transmitted and acknowledged
connection->dataState = FTP_DATA_STATE_WAIT_ACK;
//Exit immediately
return;
}
}
//Directory listing in progress?
else if(connection->controlState == FTP_CONTROL_STATE_LIST)
{
uint_t perm;
time_t currentTime;
time_t modified;
char_t *path;
FsDirEntry dirEntry;
//Read a new entry in the directory
error = fsReadDir(connection->dir, &dirEntry);
//End of stream?
if(error)
{
//Close directory
fsCloseDir(connection->dir);
connection->dir = NULL;
//Wait for all the data to be transmitted and acknowledged
connection->dataState = FTP_DATA_STATE_WAIT_ACK;
//Exit immediately
return;
}
//Point to the scratch buffer
path = connection->buffer;
//Get the pathname of the directory being listed
strcpy(path, connection->path);
//Retrieve the full pathname
pathCombine(path, dirEntry.name, FTP_SERVER_MAX_PATH_LEN);
pathCanonicalize(path);
//Get permissions for the specified file
perm = ftpServerGetFilePermissions(context, connection, path);
//Enforce access rights
if(perm & FTP_FILE_PERM_LIST)
{
//Format links, owner, group and size fields
n = sprintf(connection->buffer, "---------- 1 owner group %10" PRIu32,
dirEntry.size);
//Check whether the current entry is a directory
if(dirEntry.attributes & FS_FILE_ATTR_DIRECTORY)
connection->buffer[0] = 'd';
//Read access?
if(perm & FTP_FILE_PERM_READ)
{
connection->buffer[1] = 'r';
connection->buffer[4] = 'r';
connection->buffer[7] = 'r';
}
//Write access
if(perm & FTP_FILE_PERM_WRITE)
{
connection->buffer[2] = 'w';
connection->buffer[5] = 'w';
connection->buffer[8] = 'w';
}
//Get current time
currentTime = getCurrentUnixTime();
//Get modification time
modified = convertDateToUnixTime(&dirEntry.modified);
//Check whether the modification time is within the previous 180 days
if(currentTime > modified && currentTime < (modified + FTP_SERVER_180_DAYS))
{
//The format of the date/time field is Mmm dd hh:mm
n += sprintf(connection->buffer + n, " %s %02" PRIu8 " %02" PRIu8 ":%02" PRIu8,
months[MIN(dirEntry.modified.month, 12)], dirEntry.modified.day,
dirEntry.modified.hours, dirEntry.modified.minutes);
}
else
{
//The format of the date/time field is Mmm dd yyyy
n += sprintf(connection->buffer + n, " %s %02" PRIu8 " %04" PRIu16,
months[MIN(dirEntry.modified.month, 12)], dirEntry.modified.day,
dirEntry.modified.year);
}
//Append filename
n += sprintf(connection->buffer + n, " %s\r\n", dirEntry.name);
//Debug message
TRACE_DEBUG("FTP server: %s", connection->buffer);
}
else
{
//Insufficient access rights
n = 0;
}
}
//Invalid state?
else
{
//The FTP server has encountered a critical error
ftpServerCloseConnection(context, connection);
//Exit immediately
return;
}
//Number of bytes in the buffer
connection->bufferPos = 0;
connection->bufferLength = n;
}
}