| /* |
| * Copyright (c) 1996, 2009, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| |
| package sun.security.ssl; |
| |
| import java.io.*; |
| |
| /** |
| * InputStream for application data as returned by SSLSocket.getInputStream(). |
| * It uses an InputRecord as internal buffer that is refilled on demand |
| * whenever it runs out of data. |
| * |
| * @author David Brownell |
| */ |
| class AppInputStream extends InputStream { |
| |
| // static dummy array we use to implement skip() |
| private final static byte[] SKIP_ARRAY = new byte[1024]; |
| |
| private SSLSocketImpl c; |
| InputRecord r; |
| |
| // One element array used to implement the single byte read() method |
| private final byte[] oneByte = new byte[1]; |
| |
| AppInputStream(SSLSocketImpl conn) { |
| r = new InputRecord(); |
| c = conn; |
| } |
| |
| /** |
| * Return the minimum number of bytes that can be read without blocking. |
| * Currently not synchronized. |
| */ |
| public int available() throws IOException { |
| if (c.checkEOF() || (r.isAppDataValid() == false)) { |
| return 0; |
| } |
| return r.available(); |
| } |
| |
| /** |
| * Read a single byte, returning -1 on non-fault EOF status. |
| */ |
| public synchronized int read() throws IOException { |
| int n = read(oneByte, 0, 1); |
| if (n <= 0) { // EOF |
| return -1; |
| } |
| return oneByte[0] & 0xff; |
| } |
| |
| /** |
| * Read up to "len" bytes into this buffer, starting at "off". |
| * If the layer above needs more data, it asks for more, so we |
| * are responsible only for blocking to fill at most one buffer, |
| * and returning "-1" on non-fault EOF status. |
| */ |
| public synchronized int read(byte b[], int off, int len) |
| throws IOException { |
| if (b == null) { |
| throw new NullPointerException(); |
| } else if (off < 0 || len < 0 || len > b.length - off) { |
| throw new IndexOutOfBoundsException(); |
| } else if (len == 0) { |
| return 0; |
| } |
| |
| if (c.checkEOF()) { |
| return -1; |
| } |
| try { |
| /* |
| * Read data if needed ... notice that the connection guarantees |
| * that handshake, alert, and change cipher spec data streams are |
| * handled as they arrive, so we never see them here. |
| */ |
| while (r.available() == 0) { |
| c.readDataRecord(r); |
| if (c.checkEOF()) { |
| return -1; |
| } |
| } |
| |
| int howmany = Math.min(len, r.available()); |
| howmany = r.read(b, off, howmany); |
| return howmany; |
| } catch (Exception e) { |
| // shutdown and rethrow (wrapped) exception as appropriate |
| c.handleException(e); |
| // dummy for compiler |
| return -1; |
| } |
| } |
| |
| |
| /** |
| * Skip n bytes. This implementation is somewhat less efficient |
| * than possible, but not badly so (redundant copy). We reuse |
| * the read() code to keep things simpler. Note that SKIP_ARRAY |
| * is static and may garbled by concurrent use, but we are not interested |
| * in the data anyway. |
| */ |
| public synchronized long skip(long n) throws IOException { |
| long skipped = 0; |
| while (n > 0) { |
| int len = (int)Math.min(n, SKIP_ARRAY.length); |
| int r = read(SKIP_ARRAY, 0, len); |
| if (r <= 0) { |
| break; |
| } |
| n -= r; |
| skipped += r; |
| } |
| return skipped; |
| } |
| |
| /* |
| * Socket close is already synchronized, no need to block here. |
| */ |
| public void close() throws IOException { |
| c.close(); |
| } |
| |
| // inherit default mark/reset behavior (throw Exceptions) from InputStream |
| |
| } |