/** @param channel */
protected void freeChannel(Channel channel) {
synchronized (activeChannels) {
log.info(
"Freeing channel "
+ String.valueOf(channel.getLocalChannelId())
+ " ["
+ channel.getName()
+ "]");
Long channelId = new Long(channel.getLocalChannelId());
activeChannels.remove(channelId);
// reusableChannels.add(channelId);
}
}
protected void onStop() {
log.info("Closing all active channels");
try {
Channel channel;
for (Iterator x = activeChannels.values().iterator(); x.hasNext(); ) {
channel = (Channel) x.next();
if (channel != null) {
if (log.isDebugEnabled()) {
log.debug(
"Closing "
+ channel.getName()
+ " id="
+ String.valueOf(channel.getLocalChannelId()));
}
channel.close();
}
}
} catch (Throwable t) {
}
activeChannels.clear();
}
/**
* @param channel
* @param eventListener
* @return
* @throws IOException
* @throws SshException
*/
public synchronized boolean openChannel(Channel channel, ChannelEventListener eventListener)
throws IOException {
synchronized (activeChannels) {
Long channelId = getChannelId();
// Create the message
SshMsgChannelOpen msg =
new SshMsgChannelOpen(
channel.getChannelType(),
channelId.longValue(),
channel.getLocalWindow().getWindowSpace(),
channel.getLocalPacketSize(),
channel.getChannelOpenData());
// Send the message
transport.sendMessage(msg, this);
// Wait for the next message to confirm the open channel (or not)
int[] messageIdFilter = new int[2];
messageIdFilter[0] = SshMsgChannelOpenConfirmation.SSH_MSG_CHANNEL_OPEN_CONFIRMATION;
messageIdFilter[1] = SshMsgChannelOpenFailure.SSH_MSG_CHANNEL_OPEN_FAILURE;
try {
SshMessage result = messageStore.getMessage(messageIdFilter);
if (result.getMessageId()
== SshMsgChannelOpenConfirmation.SSH_MSG_CHANNEL_OPEN_CONFIRMATION) {
SshMsgChannelOpenConfirmation conf = (SshMsgChannelOpenConfirmation) result;
activeChannels.put(channelId, channel);
log.debug("Initiating channel");
channel.init(
this,
channelId.longValue(),
conf.getSenderChannel(),
conf.getInitialWindowSize(),
conf.getMaximumPacketSize(),
eventListener);
channel.open();
log.info(
"Channel "
+ String.valueOf(channel.getLocalChannelId())
+ " is open ["
+ channel.getName()
+ "]");
return true;
} else {
// Make sure the channels state is closed
channel.getState().setValue(ChannelState.CHANNEL_CLOSED);
return false;
}
} catch (MessageStoreEOFException mse) {
throw new IOException(mse.getMessage());
} catch (InterruptedException ex) {
throw new SshException(
"The thread was interrupted whilst waiting for a connection protocol message");
}
}
}
/**
* @param channel
* @throws IOException
*/
protected void sendChannelOpenConfirmation(Channel channel) throws IOException {
SshMsgChannelOpenConfirmation msg =
new SshMsgChannelOpenConfirmation(
channel.getRemoteChannelId(),
channel.getLocalChannelId(),
channel.getLocalWindow().getWindowSpace(),
channel.getLocalPacketSize(),
channel.getChannelConfirmationData());
transport.sendMessage(msg, this);
}
/**
* @param channel
* @throws IOException
*/
protected void closeChannel(Channel channel) throws IOException {
SshMsgChannelClose msg = new SshMsgChannelClose(channel.getRemoteChannelId());
log.info(
"Local computer has closed channel "
+ String.valueOf(channel.getLocalChannelId())
+ "["
+ channel.getName()
+ "]");
transport.sendMessage(msg, this);
}
/**
* @param channel
* @throws IOException
*/
public void sendChannelEOF(Channel channel) throws IOException {
synchronized (activeChannels) {
if (!activeChannels.containsValue(channel)) {
throw new IOException(
"Attempt to send EOF for a non existent channel "
+ String.valueOf(channel.getLocalChannelId()));
}
log.info(
"Local computer has set channel "
+ String.valueOf(channel.getLocalChannelId())
+ " to EOF ["
+ channel.getName()
+ "]");
SshMsgChannelEOF msg = new SshMsgChannelEOF(channel.getRemoteChannelId());
transport.sendMessage(msg, this);
}
}
/**
* @param channel
* @param data
* @throws IOException
*/
public synchronized void sendChannelData(Channel channel, byte[] data) throws IOException {
synchronized (channel.getState()) {
if (log.isDebugEnabled()) {
log.debug(
"Sending "
+ String.valueOf(data.length)
+ " bytes for channel id "
+ String.valueOf(channel.getLocalChannelId()));
}
int sent = 0;
int block;
int remaining;
long max;
byte[] buffer;
ChannelDataWindow window = channel.getRemoteWindow();
while (sent < data.length) {
remaining = data.length - sent;
max =
((window.getWindowSpace() < channel.getRemotePacketSize())
&& (window.getWindowSpace() > 0))
? window.getWindowSpace()
: channel.getRemotePacketSize();
block = (max < remaining) ? (int) max : remaining;
channel.remoteWindow.consumeWindowSpace(block);
buffer = new byte[block];
System.arraycopy(data, sent, buffer, 0, block);
SshMsgChannelData msg = new SshMsgChannelData(channel.getRemoteChannelId(), buffer);
transport.sendMessage(msg, this);
/* if (type != null) {
channel.sendChannelExtData(type.intValue(), buffer);
} else {
channel.sendChannelData(buffer);
}*/
sent += block;
}
}
}
private void onMsgChannelClose(SshMsgChannelClose msg) throws IOException {
Channel channel = getChannel(msg.getRecipientChannel());
// If we have not already closed it then inform the subclasses
if (channel == null) {
throw new IOException(
"Remote computer tried to close a "
+ "non existent channel "
+ String.valueOf(msg.getRecipientChannel()));
}
log.info(
"Remote computer has closed channel "
+ String.valueOf(channel.getLocalChannelId())
+ "["
+ channel.getName()
+ "]");
// If the channel is not already closed then close it
if (channel.getState().getValue() != ChannelState.CHANNEL_CLOSED) {
channel.remoteClose();
}
}