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| 1 | /* | ||
| 2 | * Copyright (c) 1996, 2009, Oracle and/or its affiliates. All rights reserved. | ||
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | ||
| 4 | * | ||
| 5 | * This code is free software; you can redistribute it and/or modify it | ||
| 6 | * under the terms of the GNU General Public License version 2 only, as | ||
| 7 | * published by the Free Software Foundation. Oracle designates this | ||
| 8 | * particular file as subject to the "Classpath" exception as provided | ||
| 9 | * by Oracle in the LICENSE file that accompanied this code. | ||
| 10 | * | ||
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT | ||
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | ||
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | ||
| 14 | * version 2 for more details (a copy is included in the LICENSE file that | ||
| 15 | * accompanied this code). | ||
| 16 | * | ||
| 17 | * You should have received a copy of the GNU General Public License version | ||
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, | ||
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | ||
| 20 | * | ||
| 21 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | ||
| 22 | * or visit www.oracle.com if you need additional information or have any | ||
| 23 | * questions. | ||
| 24 | */ | ||
| 25 | |||
| 26 | |||
| 27 | package sun.security.ssl; | ||
| 28 | |||
| 29 | import java.io.*; | ||
| 30 | |||
| 31 | /** | ||
| 32 | * InputStream for application data as returned by SSLSocket.getInputStream(). | ||
| 33 | * It uses an InputRecord as internal buffer that is refilled on demand | ||
| 34 | * whenever it runs out of data. | ||
| 35 | * | ||
| 36 | * @author David Brownell | ||
| 37 | */ | ||
| 38 | class AppInputStream extends InputStream { | ||
| 39 | |||
| 40 | // static dummy array we use to implement skip() | ||
| 41 | private final static byte[] SKIP_ARRAY = new byte[1024]; | ||
| 42 | |||
| 43 | private SSLSocketImpl c; | ||
| 44 | InputRecord r; | ||
| 45 | |||
| 46 | // One element array used to implement the single byte read() method | ||
| 47 | private final byte[] oneByte = new byte[1]; | ||
| 48 | |||
| 49 | AppInputStream(SSLSocketImpl conn) { | ||
| 50 | r = new InputRecord(); | ||
| 51 | c = conn; | ||
| 52 | } | ||
| 53 | |||
| 54 | /** | ||
| 55 | * Return the minimum number of bytes that can be read without blocking. | ||
| 56 | * Currently not synchronized. | ||
| 57 | */ | ||
| 58 | public int available() throws IOException { | ||
| 59 | if (c.checkEOF() || (r.isAppDataValid() == false)) { | ||
| 60 | return 0; | ||
| 61 | } | ||
| 62 | return r.available(); | ||
| 63 | } | ||
| 64 | |||
| 65 | /** | ||
| 66 | * Read a single byte, returning -1 on non-fault EOF status. | ||
| 67 | */ | ||
| 68 | public synchronized int read() throws IOException { | ||
| 69 | int n = read(oneByte, 0, 1); | ||
| 70 | if (n <= 0) { // EOF | ||
| 71 | return -1; | ||
| 72 | } | ||
| 73 | return oneByte[0] & 0xff; | ||
| 74 | } | ||
| 75 | |||
| 76 | /** | ||
| 77 | * Read up to "len" bytes into this buffer, starting at "off". | ||
| 78 | * If the layer above needs more data, it asks for more, so we | ||
| 79 | * are responsible only for blocking to fill at most one buffer, | ||
| 80 | * and returning "-1" on non-fault EOF status. | ||
| 81 | */ | ||
| 82 | public synchronized int read(byte b[], int off, int len) | ||
| 83 | throws IOException { | ||
| 84 | if (b == null) { | ||
| 85 | throw new NullPointerException(); | ||
| 86 | } else if (off < 0 || len < 0 || len > b.length - off) { | ||
| 87 | throw new IndexOutOfBoundsException(); | ||
| 88 | } else if (len == 0) { | ||
| 89 | return 0; | ||
| 90 | } | ||
| 91 | |||
| 92 | if (c.checkEOF()) { | ||
| 93 | return -1; | ||
| 94 | } | ||
| 95 | try { | ||
| 96 | /* | ||
| 97 | * Read data if needed ... notice that the connection guarantees | ||
| 98 | * that handshake, alert, and change cipher spec data streams are | ||
| 99 | * handled as they arrive, so we never see them here. | ||
| 100 | */ | ||
| 101 | while (r.available() == 0) { | ||
| 102 | c.readDataRecord(r); | ||
| 103 | if (c.checkEOF()) { | ||
| 104 | return -1; | ||
| 105 | } | ||
| 106 | } | ||
| 107 | |||
| 108 | int howmany = Math.min(len, r.available()); | ||
| 109 | howmany = r.read(b, off, howmany); | ||
| 110 | return howmany; | ||
| 111 | } catch (Exception e) { | ||
| 112 | // shutdown and rethrow (wrapped) exception as appropriate | ||
| 113 | c.handleException(e); | ||
| 114 | // dummy for compiler | ||
| 115 | return -1; | ||
| 116 | } | ||
| 117 | } | ||
| 118 | |||
| 119 | |||
| 120 | /** | ||
| 121 | * Skip n bytes. This implementation is somewhat less efficient | ||
| 122 | * than possible, but not badly so (redundant copy). We reuse | ||
| 123 | * the read() code to keep things simpler. Note that SKIP_ARRAY | ||
| 124 | * is static and may garbled by concurrent use, but we are not interested | ||
| 125 | * in the data anyway. | ||
| 126 | */ | ||
| 127 | public synchronized long skip(long n) throws IOException { | ||
| 128 | long skipped = 0; | ||
| 129 | while (n > 0) { | ||
| 130 | int len = (int)Math.min(n, SKIP_ARRAY.length); | ||
| 131 | int r = read(SKIP_ARRAY, 0, len); | ||
| 132 | if (r <= 0) { | ||
| 133 | break; | ||
| 134 | } | ||
| 135 | n -= r; | ||
| 136 | skipped += r; | ||
| 137 | } | ||
| 138 | return skipped; | ||
| 139 | } | ||
| 140 | |||
| 141 | /* | ||
| 142 | * Socket close is already synchronized, no need to block here. | ||
| 143 | */ | ||
| 144 | public void close() throws IOException { | ||
| 145 | c.close(); | ||
| 146 | } | ||
| 147 | |||
| 148 | // inherit default mark/reset behavior (throw Exceptions) from InputStream | ||
| 149 | |||
| 150 | } | ||