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;
}
/**
* This constructor is where the real work takes place. Connect to the specified address and port.
* Use default local values if not specified, otherwise use the local host and port passed in.
* Create as stream or datagram based on "stream" argument.
*
* <p>
*
* @param raddr The remote address to connect to
* @param rport The remote port to connect to
* @param laddr The local address to connect to
* @param lport The local port to connect to
* @param stream true for a stream socket, false for a datagram socket
* @exception IOException If an error occurs
* @exception SecurityException If a security manager exists and its checkConnect method doesn't
* allow the operation
*/
private Socket(InetAddress raddr, int rport, InetAddress laddr, int lport, boolean stream)
throws IOException {
this();
this.inputShutdown = false;
this.outputShutdown = false;
if (impl == null) throw new IOException("Cannot initialize Socket implementation");
SecurityManager sm = System.getSecurityManager();
if (sm != null) sm.checkConnect(raddr.getHostName(), rport);
impl.create(stream);
// FIXME: JCL p. 1586 says if localPort is unspecified, bind to any port,
// i.e. '0' and if localAddr is unspecified, use getLocalAddress() as
// that default. JDK 1.2 doc infers not to do a bind.
if (laddr != null) impl.bind(laddr, lport);
if (raddr != null) impl.connect(raddr, rport);
}
/**
* Returns the local address to which this socket is bound. If this socket is not connected, then
* <code>null</code> is returned.
*
* @return The local address
* @since 1.1
*/
public InetAddress getLocalAddress() {
if (impl == null) return null;
InetAddress addr = null;
try {
addr = (InetAddress) impl.getOption(SocketOptions.SO_BINDADDR);
} catch (SocketException e) {
// (hopefully) shouldn't happen
// throw new java.lang.InternalError
// ("Error in PlainSocketImpl.getOption");
return null;
}
// FIXME: According to libgcj, checkConnect() is supposed to be called
// before performing this operation. Problems: 1) We don't have the
// addr until after we do it, so we do a post check. 2). The docs I
// see don't require this in the Socket case, only DatagramSocket, but
// we'll assume they mean both.
SecurityManager sm = System.getSecurityManager();
if (sm != null) sm.checkConnect(addr.getHostName(), getLocalPort());
return addr;
}
