@Override public DatagramChannel bind(SocketAddress local) throws IOException { synchronized (readLock) { synchronized (writeLock) { synchronized (stateLock) { ensureOpen(); if (localAddress != null) throw new AlreadyBoundException(); InetSocketAddress isa; if (local == null) { // only Inet4Address allowed with IPv4 socket if (family == StandardProtocolFamily.INET) { isa = new InetSocketAddress(InetAddress.getByName("0.0.0.0"), 0); } else { isa = new InetSocketAddress(0); } } else { isa = Net.checkAddress(local); // only Inet4Address allowed with IPv4 socket if (family == StandardProtocolFamily.INET) { InetAddress addr = isa.getAddress(); if (!(addr instanceof Inet4Address)) throw new UnsupportedAddressTypeException(); } } SecurityManager sm = System.getSecurityManager(); if (sm != null) { sm.checkListen(isa.getPort()); } Net.bind(family, fd, isa.getAddress(), isa.getPort()); localAddress = Net.localAddress(fd); } } } return this; }
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; }
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; }