Mirrors/sshj
1
0
Fork 0
mirror of https://github.com/hierynomus/sshj.git synced 2025-12-06 07:10:53 +03:00
Code Issues Actions Packages Projects Releases Wiki Activity

Restore mutual exclusion of sendChannelRequest() and gotResponse() in AbstractChannel (but rather than make methods synchronized do it on the queue, which itself doesn't need to be thread-safe). Regression due to 1a2351c5ee. Fixes #35.

Browse Source
This commit is contained in:
Shikhar Bhushan
2011-10-02 09:47:49 +01:00
parent f83bf2cd3f
commit f1b3dbb102
1 changed files with 27 additions and 23 deletions
Download Patch File Download Diff File Expand all files Collapse all files

50
src/main/java/net/schmizz/sshj/connection/channel/AbstractChannel.java
View File

@@ -53,8 +53,8 @@ import org.slf4j.LoggerFactory;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.LinkedList;
import java.util.Queue;
import java.util.concurrent.ConcurrentLinkedQueue;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.locks.ReentrantLock;
@@ -76,7 +76,7 @@ public abstract class AbstractChannel
/** Remote recipient ID */
private int recipient;
private final Queue<Event<ConnectionException>> chanReqResponseEvents = new ConcurrentLinkedQueue<Event<ConnectionException>>();
private final Queue<Event<ConnectionException>> chanReqResponseEvents = new LinkedList<Event<ConnectionException>>();
/* The lock used by to create the open & close events */
private final ReentrantLock lock = new ReentrantLock();
@@ -368,33 +368,37 @@ public abstract class AbstractChannel
Buffer.PlainBuffer reqSpecific)
throws TransportException {
log.info("Sending channel request for `{}`", reqType);
trans.write(
newBuffer(Message.CHANNEL_REQUEST)
.putString(reqType)
.putBoolean(wantReply)
.putBuffer(reqSpecific)
);
synchronized (chanReqResponseEvents) {
trans.write(
newBuffer(Message.CHANNEL_REQUEST)
.putString(reqType)
.putBoolean(wantReply)
.putBuffer(reqSpecific)
);
Event<ConnectionException> responseEvent = null;
if (wantReply) {
responseEvent = new Event<ConnectionException>("chan#" + id + " / " + "chanreq for " + reqType,
ConnectionException.chainer);
chanReqResponseEvents.add(responseEvent);
Event<ConnectionException> responseEvent = null;
if (wantReply) {
responseEvent = new Event<ConnectionException>("chan#" + id + " / " + "chanreq for " + reqType,
ConnectionException.chainer);
chanReqResponseEvents.add(responseEvent);
}
return responseEvent;
}
return responseEvent;
}
private void gotResponse(boolean success)
throws ConnectionException {
final Event<ConnectionException> responseEvent = chanReqResponseEvents.poll();
if (responseEvent != null) {
if (success)
responseEvent.set();
else
responseEvent.deliverError(new ConnectionException("Request failed"));
} else
throw new ConnectionException(DisconnectReason.PROTOCOL_ERROR,
"Received response to channel request when none was requested");
synchronized (chanReqResponseEvents) {
final Event<ConnectionException> responseEvent = chanReqResponseEvents.poll();
if (responseEvent != null) {
if (success)
responseEvent.set();
else
responseEvent.deliverError(new ConnectionException("Request failed"));
} else
throw new ConnectionException(DisconnectReason.PROTOCOL_ERROR,
"Received response to channel request when none was requested");
}
}
private synchronized void gotEOF()