undefect. CWE-407 — 63 sites patched across 27 ecosystems

Authors: russell@unturf.com · brackishbert@gmail.com · foxhop.net · TimeHexOn.com Patches, unit tests, benchmarks, whitepaper, and outreach briefs. Public domain — no copyright claimed. Use freely.
2026-03-26 17:11:57 -04:00 · 2026-03-26 17:11:57 -04:00 · 0a580b313d
commit 0a580b313d
70422 changed files with 17213626 additions and 0 deletions
--- a/test/jdk/java/nio/channels/ServerSocketChannel/Basic.java
+++ b/test/jdk/java/nio/channels/ServerSocketChannel/Basic.java
@ -0,0 +1,145 @@
+/*
+ * Copyright (c) 2000, 2016, 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.
+ *
+ * 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.
+ */
+
+/* @test
+ * @bug 4286936 8143100
+ * @summary Unit test for server-socket channels
+ * @library ..
+ */
+
+import java.io.*;
+import java.net.*;
+import java.nio.*;
+import java.nio.channels.*;
+
+
+public class Basic {
+
+    static PrintStream log = System.err;
+
+    static class Server
+        extends TestThread
+    {
+        ServerSocketChannel ssc;
+        boolean block;
+
+        Server(ServerSocketChannel ssc, boolean block) {
+            super("Server", Basic.log);
+            this.ssc = ssc;
+            this.block = block;
+        }
+
+        void go() throws Exception {
+            log.println("Server: Listening "
+                        + (block ? "(blocking)" : "(non-blocking)"));
+            if (!block)
+                ssc.configureBlocking(false);
+            log.println("  " + ssc);
+            //log.println("  " + ssc.options());
+            SocketChannel sc = null;
+            for (;;) {
+                sc = ssc.accept();
+                if (sc != null) {
+                    break;
+                }
+                log.println("Server: Sleeping...");
+                Thread.sleep(50);
+            }
+            log.println("Server: Accepted " + sc);
+            ByteBuffer bb = ByteBuffer.allocateDirect(100);
+            if (sc.read(bb) != 1)
+                throw new Exception("Read failed");
+            bb.flip();
+            byte b = bb.get();
+            log.println("Server: Read " + b + ", writing " + (b + 1));
+            bb.clear();
+            bb.put((byte)43);
+            bb.flip();
+            if (sc.write(bb) != 1)
+                throw new Exception("Write failed");
+            sc.close();
+            ssc.close();
+            log.println("Server: Finished");
+        }
+
+    }
+
+    static class Client
+        extends TestThread
+    {
+        int port;
+        boolean dally;
+
+        Client(int port, boolean block) {
+            super("Client", Basic.log);
+            this.port = port;
+            this.dally = !block;
+        }
+
+        public void go() throws Exception {
+            if (dally)
+                Thread.sleep(200);
+            InetSocketAddress isa
+                = new InetSocketAddress(InetAddress.getLocalHost(), port);
+            log.println("Client: Connecting to " + isa);
+            SocketChannel sc = SocketChannel.open();
+            sc.connect(isa);
+            log.println("Client: Connected");
+            ByteBuffer bb = ByteBuffer.allocateDirect(512);
+            bb.put((byte)42).flip();
+            log.println("Client: Writing " + bb.get(0));
+            if (sc.write(bb) != 1)
+                throw new Exception("Write failed");
+            bb.clear();
+            if (sc.read(bb) != 1)
+                throw new Exception("Read failed");
+            bb.flip();
+            if (bb.get() != 43)
+                throw new Exception("Read " + bb.get(bb.position() - 1));
+            log.println("Client: Read " + bb.get(0));
+            sc.close();
+            log.println("Client: Finished");
+        }
+
+    }
+
+    static void test(boolean block) throws Exception {
+        ServerSocketChannel ssc = ServerSocketChannel.open();
+        ssc.socket().setReuseAddress(true);
+        int port = TestUtil.bind(ssc);
+        Server server = new Server(ssc, block);
+        Client client = new Client(port, block);
+        server.start();
+        client.start();
+        if ((server.finish(0) & client.finish(0)) == 0)
+            throw new Exception("Failure");
+        log.println();
+    }
+
+    public static void main(String[] args) throws Exception {
+        log.println();
+        test(true);
+        test(false);
+    }
+
+}