function tftpd_send_nak($s, &$sock, $err, $msg = '')
{
$tftpd_error = array(0 => 'Undefined error', 1 => 'File not found', 2 => 'Access violation', 3 => 'Disk full or allocation exceeded', 4 => 'Illegal TFTP operation', 5 => 'Unknown transfer ID', 6 => 'File already exists', 7 => 'No such user');
$buf = pack('nna*', TFTP_ERROR, $err, $tftpd_error[$err]);
tftpd_send_packet($s, $sock, $buf);
tftpd_log('1', 'abort: (' . $err . ') ' . $tftpd_error[$err] . ' - ' . $msg);
}
function tftpd_recv_config($s, $sock, &$db)
{
$recv_data = '';
$block = 0;
$xfer_byte = 0;
$xfer_time = tftpd_microtime();
do {
if (!tftpd_receive_data($s, $sock, $block, $data)) {
return false;
}
$recv_data .= $data;
$block++;
$xfer_byte += strlen($data);
} while (strlen($data) == 512);
/* Be a good citizen and churn out one last ACK */
$s_buf = pack('nn', TFTP_ACK, $block);
tftpd_send_packet($s, $sock, $s_buf);
/* Log our success */
$xfer_time = round(tftpd_microtime() - $xfer_time, 3);
tftpd_log('1', 'received ' . $xfer_byte . ' bytes in ' . $xfer_time . ' seconds');
/* Write config to database */
tftpd_db_write_config($db, $recv_data);
}
function tftpd_recv_file($s, $sock, $fp)
{
$block = 0;
$xfer_byte = 0;
$xfer_time = tftpd_microtime();
do {
if (!tftpd_receive_data($s, $sock, $block, $data)) {
return false;
}
$r = fwrite($fp, $data);
if ($r != strlen($data)) {
tftpd_send_nak($c_sock, $sock, TFTP_ENOSPACE, 'disk full?');
return false;
}
$block++;
if ($block > 65535) {
$block = 0;
}
$xfer_byte += strlen($data);
} while (strlen($data) == 512);
/* Be a good citizen and churn out one last ACK */
$s_buf = pack('nn', TFTP_ACK, $block);
tftpd_send_packet($s, $sock, $s_buf);
/* Log our success */
$xfer_time = round(tftpd_microtime() - $xfer_time, 3);
tftpd_log('1', 'received ' . $xfer_byte . ' bytes in ' . $xfer_time . ' seconds');
}
