/**
* @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");
}
}
}
private void onMsgChannelExtendedData(SshMsgChannelExtendedData msg) throws IOException {
Channel channel = getChannel(msg.getRecipientChannel());
if (channel == null) {
throw new IOException("Remote computer sent data for non existent channel");
}
channel.getLocalWindow().consumeWindowSpace(msg.getChannelData().length);
channel.processChannelData(msg);
}
/**
* @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);
}
