List of usage examples for org.apache.commons.net.tftp TFTP NETASCII_MODE
int NETASCII_MODE
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From source file:org.mobicents.slee.resource.tftp.TFTPTransfer.java
private void handleRead(TFTPReadRequestPacket trrp) throws Exception { long totalBytesSent = 0; try {//from w w w . j a v a2s .c om if (mode_ == ServerMode.PUT_ONLY) { transferTftp_.bufferedSend(new TFTPErrorPacket(trrp.getAddress(), trrp.getPort(), TFTPErrorPacket.ILLEGAL_OPERATION, "Read not allowed by server.")); return; } if (trc.isFineEnabled()) trc.fine("READ request received, get cracking"); fireEvent(trrp); suspend(0); // TODO: do we really need to wait forever? if (trrp.getMode() == TFTP.NETASCII_MODE) { is_ = new ToNetASCIIInputStream(is_); } byte[] temp = new byte[TFTPDataPacket.MAX_DATA_LENGTH]; TFTPPacket answer; int block = 1; boolean sendNext = true; int readLength = TFTPDataPacket.MAX_DATA_LENGTH; TFTPDataPacket lastSentData = null; // We are reading a file, so when we read less than the // requested bytes, we know that we are at the end of the file. while (readLength == TFTPDataPacket.MAX_DATA_LENGTH && !shutdownTransfer) { if (sendNext) { readLength = is_.read(temp); if (readLength == -1) { readLength = 0; } lastSentData = new TFTPDataPacket(trrp.getAddress(), trrp.getPort(), block, temp, 0, readLength); transferTftp_.bufferedSend(lastSentData); totalBytesSent += readLength; } answer = null; int timeoutCount = 0; while (!shutdownTransfer && (answer == null || !answer.getAddress().equals(trrp.getAddress()) || answer.getPort() != trrp.getPort())) { // listen for an answer. if (answer != null) { // The answer that we got didn't come from the // expected source, fire back an error, and continue // listening. trc.warning("TFTP Server ignoring message from unexpected source."); transferTftp_.bufferedSend(new TFTPErrorPacket(answer.getAddress(), answer.getPort(), TFTPErrorPacket.UNKNOWN_TID, "Unexpected Host or Port")); } try { answer = transferTftp_.bufferedReceive(); } catch (SocketTimeoutException e) { if (timeoutCount >= maxTimeoutRetries_) { throw e; } // didn't get an ack for this data. need to resend // it. timeoutCount++; transferTftp_.bufferedSend(lastSentData); continue; } } if (answer == null || !(answer instanceof TFTPAckPacket)) { if (!shutdownTransfer) { trc.severe("Unexpected response from tftp client during transfer (" + answer + "). Transfer aborted."); } break; } else { // once we get here, we know we have an answer packet // from the correct host. TFTPAckPacket ack = (TFTPAckPacket) answer; if (ack.getBlockNumber() != block) { /* * The origional tftp spec would have called on us to resend the * previous data here, however, that causes the SAS Syndrome. * http://www.faqs.org/rfcs/rfc1123.html section 4.2.3.1 The modified * spec says that we ignore a duplicate ack. If the packet was really * lost, we will time out on receive, and resend the previous data at * that point. */ sendNext = false; } else { // send the next block block++; if (block > 65535) { // wrap the block number block = 0; } sendNext = true; } } } } finally { if (trc.isFineEnabled()) trc.fine("Bytes sent = " + totalBytesSent); try { if (is_ != null) is_.close(); if (sbbOs != null) sbbOs.close(); } catch (IOException e) { // noop } } }
From source file:org.mobicents.slee.resource.tftp.TFTPTransfer.java
private void handleWrite(TFTPWriteRequestPacket twrp) throws Exception { long totalBytesReceived = 0; try {/*from ww w.ja v a 2s . c o m*/ if (mode_ == ServerMode.GET_ONLY) { transferTftp_.bufferedSend(new TFTPErrorPacket(twrp.getAddress(), twrp.getPort(), TFTPErrorPacket.ILLEGAL_OPERATION, "Write not allowed by server.")); return; } if (trc.isFineEnabled()) trc.fine("WRITE request received, get cracking"); fireEvent(twrp); suspend(0); if (twrp.getMode() == TFTP.NETASCII_MODE) { os_ = new FromNetASCIIOutputStream(os_); } TFTPAckPacket lastSentAck = new TFTPAckPacket(twrp.getAddress(), twrp.getPort(), 0); transferTftp_.bufferedSend(lastSentAck); int lastBlock = 0; while (true) { // get the response - ensure it is from the right place. TFTPPacket dataPacket = null; int timeoutCount = 0; while (!shutdownTransfer && (dataPacket == null || !dataPacket.getAddress().equals(twrp.getAddress()) || dataPacket.getPort() != twrp.getPort())) { // listen for an answer. if (dataPacket != null) { // The data that we got didn't come from the // expected source, fire back an error, and continue // listening. trc.warning("TFTP Server ignoring message from unexpected source."); transferTftp_.bufferedSend(new TFTPErrorPacket(dataPacket.getAddress(), dataPacket.getPort(), TFTPErrorPacket.UNKNOWN_TID, "Unexpected Host or Port")); } try { dataPacket = transferTftp_.bufferedReceive(); } catch (SocketTimeoutException e) { if (timeoutCount >= maxTimeoutRetries_) { throw e; } // It didn't get our ack. Resend it. transferTftp_.bufferedSend(lastSentAck); timeoutCount++; continue; } } if (dataPacket != null && dataPacket instanceof TFTPWriteRequestPacket) { // it must have missed our initial ack. Send another. lastSentAck = new TFTPAckPacket(twrp.getAddress(), twrp.getPort(), 0); transferTftp_.bufferedSend(lastSentAck); } else if (dataPacket == null || !(dataPacket instanceof TFTPDataPacket)) { if (!shutdownTransfer) { trc.severe("Unexpected response from tftp client during transfer (" + dataPacket + "). Transfer aborted."); } break; } else { int block = ((TFTPDataPacket) dataPacket).getBlockNumber(); byte[] data = ((TFTPDataPacket) dataPacket).getData(); int dataLength = ((TFTPDataPacket) dataPacket).getDataLength(); int dataOffset = ((TFTPDataPacket) dataPacket).getDataOffset(); if (block > lastBlock || (lastBlock == 65535 && block == 0)) { // it might resend a data block if it missed our ack // - don't rewrite the block. os_.write(data, dataOffset, dataLength); lastBlock = block; fireEvent(dataPacket); totalBytesReceived += dataLength; } lastSentAck = new TFTPAckPacket(twrp.getAddress(), twrp.getPort(), block); transferTftp_.bufferedSend(lastSentAck); if (dataLength < TFTPDataPacket.MAX_DATA_LENGTH) { // end of stream signal - The tranfer is complete. if (trc.isFineEnabled()) trc.fine("Bytes received = " + totalBytesReceived); os_.close(); // But my ack may be lost - so listen to see if I // need to resend the ack. for (int i = 0; i < maxTimeoutRetries_; i++) { try { dataPacket = transferTftp_.bufferedReceive(); } catch (SocketTimeoutException e) { // this is the expected route - the client // shouldn't be sending any more packets. break; } if (dataPacket != null && (!dataPacket.getAddress().equals(twrp.getAddress()) || dataPacket.getPort() != twrp.getPort())) { // make sure it was from the right client... transferTftp_.bufferedSend( new TFTPErrorPacket(dataPacket.getAddress(), dataPacket.getPort(), TFTPErrorPacket.UNKNOWN_TID, "Unexpected Host or Port")); } else { // This means they sent us the last // datapacket again, must have missed our // ack. resend it. transferTftp_.bufferedSend(lastSentAck); } } // all done. break; } } } } finally { if (sbbIs != null) sbbIs.close(); if (os_ != null) os_.close(); } }