import be.nikiroo.utils.CryptUtils;
import be.nikiroo.utils.IOUtils;
import be.nikiroo.utils.StringUtils;
+import be.nikiroo.utils.Version;
import be.nikiroo.utils.serial.Exporter;
import be.nikiroo.utils.serial.Importer;
import be.nikiroo.utils.streams.BufferedOutputStream;
private Socket s;
private boolean server;
+ private Version clientVersion;
+ private Version serverVersion;
+
private CryptUtils crypt;
private Object lock = new Object();
* Method that will be called when an action is performed on either the
* client or server this {@link ConnectAction} represent.
*
+ * @param version
+ * the version on the other side of the communication (client or
+ * server)
+ *
* @throws Exception
* in case of I/O error
*/
- abstract protected void action() throws Exception;
+ abstract protected void action(Version version) throws Exception;
+
+ /**
+ * Method called when we negotiate the version with the client.
+ * <p>
+ * Thus, it is only called on the server.
+ * <p>
+ * Will return the actual server version by default.
+ *
+ * @param clientVersion
+ * the client version
+ *
+ * @return the version to send to the client
+ */
+ abstract protected Version negotiateVersion(Version clientVersion);
/**
* Handler called when an unexpected error occurs in the code.
* @param key
* an optional key to encrypt all the communications (if NULL,
* everything will be sent in clear text)
+ * @param version
+ * the client-or-server version (depending upon the boolean
+ * parameter <tt>server</tt>)
*/
- protected ConnectAction(Socket s, boolean server, String key) {
+ protected ConnectAction(Socket s, boolean server, String key,
+ Version version) {
this.s = s;
this.server = server;
if (key != null) {
crypt = new CryptUtils(key);
}
+
+ if (version == null) {
+ version = new Version();
+ }
+
+ if (server) {
+ serverVersion = version;
+ } else {
+ clientVersion = version;
+ }
+ }
+
+ /**
+ * The version of this client-or-server.
+ *
+ * @return the version
+ */
+ public Version getVersion() {
+ if (server) {
+ return serverVersion;
+ }
+
+ return clientVersion;
}
/**
try {
out = new BufferedOutputStream(s.getOutputStream());
try {
- action();
+ // Negotiate version
+ Version version;
+ if (server) {
+ String HELLO = recString();
+ if (HELLO == null || !HELLO.startsWith("VERSION ")) {
+ throw new SSLException(
+ "Client used bad encryption key");
+ }
+ version = negotiateVersion(new Version(
+ HELLO.substring("VERSION ".length())));
+ sendString("VERSION " + version);
+ } else {
+ String HELLO = sendString("VERSION " + clientVersion);
+ if (HELLO == null || !HELLO.startsWith("VERSION ")) {
+ throw new SSLException(
+ "Server did not accept the encryption key");
+ }
+ version = new Version(HELLO.substring("VERSION "
+ .length()));
+ }
+
+ // Actual code
+ action(version);
} finally {
out.close();
}