public DatagramChannel connect(SocketAddress sa) throws IOException { int localPort = 0; synchronized (readLock) { synchronized (writeLock) { synchronized (stateLock) { ensureOpenAndUnconnected(); InetSocketAddress isa = Net.checkAddress(sa); SecurityManager sm = System.getSecurityManager(); if (sm != null) sm.checkConnect(isa.getAddress().getHostAddress(), isa.getPort()); int n = Net.connect(family, fd, isa.getAddress(), isa.getPort()); if (n <= 0) throw new Error(); // Can't happen // Connection succeeded; disallow further invocation state = ST_CONNECTED; remoteAddress = sa; sender = isa; cachedSenderInetAddress = isa.getAddress(); cachedSenderPort = isa.getPort(); // set or refresh local address localAddress = Net.localAddress(fd); } } } return this; }
private JarFile getCachedJarFile(URL url) { JarFile result = (JarFile) fileCache.get(url); /* if the JAR file is cached, the permission will always be there */ if (result != null) { Permission perm = getPermission(result); if (perm != null) { SecurityManager sm = System.getSecurityManager(); if (sm != null) { try { sm.checkPermission(perm); } catch (SecurityException se) { // fallback to checkRead/checkConnect for pre 1.2 // security managers if ((perm instanceof java.io.FilePermission) && perm.getActions().indexOf("read") != -1) { sm.checkRead(perm.getName()); } else if ((perm instanceof java.net.SocketPermission) && perm.getActions().indexOf("connect") != -1) { sm.checkConnect(url.getHost(), url.getPort()); } else { throw se; } } } } } return result; }
public int send(ByteBuffer src, SocketAddress target) throws IOException { if (src == null) throw new NullPointerException(); synchronized (writeLock) { ensureOpen(); InetSocketAddress isa = Net.checkAddress(target); InetAddress ia = isa.getAddress(); if (ia == null) throw new IOException("Target address not resolved"); synchronized (stateLock) { if (!isConnected()) { if (target == null) throw new NullPointerException(); SecurityManager sm = System.getSecurityManager(); if (sm != null) { if (ia.isMulticastAddress()) { sm.checkMulticast(ia); } else { sm.checkConnect(ia.getHostAddress(), isa.getPort()); } } } else { // Connected case; Check address then write if (!target.equals(remoteAddress)) { throw new IllegalArgumentException("Connected address not equal to target address"); } return write(src); } } int n = 0; try { begin(); if (!isOpen()) return 0; writerThread = NativeThread.current(); do { n = send(fd, src, isa); } while ((n == IOStatus.INTERRUPTED) && isOpen()); synchronized (stateLock) { if (isOpen() && (localAddress == null)) { localAddress = Net.localAddress(fd); } } return IOStatus.normalize(n); } finally { writerThread = 0; end((n > 0) || (n == IOStatus.UNAVAILABLE)); assert IOStatus.check(n); } } }
@Override public DatagramChannel connect(SocketAddress sa) throws IOException { int localPort = 0; synchronized (readLock) { synchronized (writeLock) { synchronized (stateLock) { ensureOpenAndUnconnected(); InetSocketAddress isa = Net.checkAddress(sa); SecurityManager sm = System.getSecurityManager(); if (sm != null) sm.checkConnect(isa.getAddress().getHostAddress(), isa.getPort()); int n = Net.connect(family, fd, isa.getAddress(), isa.getPort()); if (n <= 0) throw new Error(); // Can't happen // Connection succeeded; disallow further invocation state = ST_CONNECTED; remoteAddress = isa; sender = isa; cachedSenderInetAddress = isa.getAddress(); cachedSenderPort = isa.getPort(); // set or refresh local address localAddress = Net.localAddress(fd); // flush any packets already received. boolean blocking = false; synchronized (blockingLock()) { try { blocking = isBlocking(); // remainder of each packet thrown away ByteBuffer tmpBuf = ByteBuffer.allocate(1); if (blocking) { configureBlocking(false); } do { tmpBuf.clear(); } while (receive(tmpBuf) != null); } finally { if (blocking) { configureBlocking(true); } } } } } } return this; }
public DatagramChannel disconnect() throws IOException { synchronized (readLock) { synchronized (writeLock) { synchronized (stateLock) { if (!isConnected() || !isOpen()) return this; InetSocketAddress isa = (InetSocketAddress) remoteAddress; SecurityManager sm = System.getSecurityManager(); if (sm != null) sm.checkConnect(isa.getAddress().getHostAddress(), isa.getPort()); disconnect0(fd); remoteAddress = null; state = ST_UNCONNECTED; // refresh local address localAddress = Net.localAddress(fd); } } } return this; }