Adopted composer autoload way

Split up classes into separate way, to allow autoloader to do it's work Signed-off-by: Diederik de Groot <ddegroot@talon.nl>
2020-03-22 10:15:31 +01:00
parent fcf7e52370
commit 5064cb3e36
34 changed files with 1292 additions and 1023 deletions
--- a/lib/TFTP/ReadTransfer.php
+++ b/lib/TFTP/ReadTransfer.php
@@ -0,0 +1,161 @@
+<?php
+/*
+ * PHP TFTP Server
+ *
+ * Copyright (c) 2011 <mattias.wadman@gmail.com>
+ *
+ * MIT License:
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+declare(strict_types=1);
+namespace PROVISION\TFTP;
+
+use PROVISION\Logger as Logger;
+use PROVISION\TFTP as TFTP;
+
+class ReadTransfer extends TFTP\Transfer {
+  private $_last_recv_ack;
+  private $_last_sent_data;
+  private $_buffer;
+  private $_block;
+  private $_last_block;
+
+  function __construct($server, $peer, $extensions)
+  {
+    parent::__construct($server, $peer, $extensions);
+    $this->_last_recv_ack = time();
+    $this->_last_sent_data = $this->_last_recv_ack;
+    $this->_buffer = false;
+    $this->_block = 1;
+    $this->_last_block = 1;
+
+    $this->log_debug("new read transfer");
+  }
+
+  private function current_block()
+  {
+    return substr($this->_buffer,
+		  ($this->_block - 1) * $this->block_size,
+		  $this->block_size);
+  }
+
+  private function packet_data_current()
+  {
+    $this->_last_sent_data = time();
+
+    if($this->state == TFTPTransferState::SENDING_WAIT_OACK)
+      return $this->packet_oack();
+    else
+      return TFTPServer::packet_data($this->_block, $this->current_block());
+  }
+
+  public function rrq($filename, $mode)
+  {
+    $this->log_debug("RRQ: filename $filename in $mode mode");
+
+    if($this->state != TFTPTransferState::READY)
+      return $this->illegal_operation("RRQ", "Not in ready state");
+
+    if(!$this->_server->exists($this->peer, $filename))
+      return $this->terminal_info(TFTPError::FILE_NOT_FOUND,
+				  "File $filename does not exist");
+
+    if(!$this->_server->readable($this->peer, $filename))
+      return $this->terminal_info(TFTPError::ACCESS_VIOLATION,
+				  "File $filename is not readable");
+
+    $this->_buffer = $this->_server->get($this->peer, $filename, $mode);
+    if($this->_buffer === false)
+      return $this->terminal_info(TFTPError::FILE_NOT_FOUND,
+				  "Failed to read $filename");
+
+    $this->log_info("Reading $filename (" .
+		    strlen($this->_buffer) . " bytes)");
+
+    if($this->use_extensions())
+      $this->state = TFTPTransferState::SENDING_WAIT_OACK;
+    else
+      $this->state = TFTPTransferState::SENDING;
+    $this->_last_block = floor(strlen($this->_buffer) /
+			       $this->block_size) + 1;
+
+    $this->log_debug("RRQ: send first block or OACK");
+    return $this->packet_data_current();
+  }
+
+  public function ack($block)
+  {
+    if($this->state == TFTPTransferState::SENDING_WAIT_OACK) {
+      if($block != 0) {
+	$this->log_debug("ACK: waiting OACK ACK got block $block");
+	return false;
+      }
+
+      $this->state = TFTPTransferState::SENDING;
+      $this->log_debug("ACK: got OACK ACK, send first block");
+      return $this->packet_data_current();
+    }
+
+    if($this->state != TFTPTransferState::SENDING)
+      return $this->illegal_operation("ACK", "Not in sending state");
+
+    $this->log_debug("ACK: block $block");
+    $this->_last_recv_ack = time();
+
+    if($block < $this->_block) {
+      $this->log_debug("ACK: duplicate block $block");
+      // just ignore it
+      return false;
+    }
+
+    if($block > $this->_last_block)
+      return $this->illegal_operation("ACK",
+				      "Block $block outside " .
+				      "range 1-{$this->_last_block}");
+
+    if($block == $this->_last_block) {
+      $this->log_debug("ACK: last block, done");
+      $this->state = TFTPTransferState::TERMINATING;
+      return false;
+    }
+
+    // move to next block
+    $this->_block = $block + 1;
+
+    $this->log_debug("ACK: sending block {$this->_block}");
+    return $this->packet_data_current();
+  }
+
+  public function retransmit($now)
+  {
+    if($now - $this->_last_recv_ack > $this->_server->timeout) {
+      $this->log_debug("retransmit: timeout");
+      $this->state = TFTPTransferState::TERMINATING;
+      return false;
+    }
+
+    if($now - $this->_last_sent_data > $this->retransmit_timeout) {
+      $this->log_debug("retransmit: resending block {$this->_block} or OACK");
+      return $this->packet_data_current();
+    }
+
+    return false;
+  }
+}
+?>