/** Check for new client connections */
private void acceptNewConnections() {
try {
SocketChannel clientChannel;
// since sSockChan is non-blocking, this will return immediately
// regardless of whether there is a connection available
while ((clientChannel = sSockChan.accept()) != null) {
if (getContext().getServer().isRedirectActive()) {
LOG.debug(
"Client redirected to {}: {}",
getContext().getServer().getRedirectAddress().getHostAddress(),
clientChannel.socket().getInetAddress().getHostAddress());
redirectAndKill(clientChannel.socket());
continue;
}
Client client =
getContext().getClients().addNewClient(clientChannel, readSelector, SEND_BUFFER_SIZE);
if (client == null) {
continue;
}
// from this point on, we know that client
// has been successfully connected
client.sendWelcomeMessage();
LOG.debug("New client connected: {}", client.getIp().getHostAddress());
}
} catch (Exception ex) {
LOG.error("Exception in acceptNewConnections(): " + ex.getMessage(), ex);
}
}
private Client getClientByIp(String ip) {
for (Client client : clients) {
if (client.getIp().equals(ip)) {
return client;
}
}
Client newClient = new Client(ip);
clients.add(newClient);
return newClient;
}
/** Note: this method is not synchronized! Note2: this method may be called recursively! */
public boolean executeCommand(String command, Client client) {
String commandClean = command.trim();
if (commandClean.isEmpty()) {
return false;
}
if (LOG.isTraceEnabled()) {
LOG.trace(
"[<-{}] \"{}\"",
(client.getAccount().getAccess() != Account.Access.NONE)
? client.getAccount().getName()
: client.getIp().getHostAddress(),
commandClean);
}
int msgId = Client.NO_MSG_ID;
if (commandClean.charAt(0) == '#') {
try {
if (!commandClean.matches("^#\\d+\\s[\\s\\S]*")) {
return false; // malformed command
}
msgId = Integer.parseInt(commandClean.substring(1).split("\\s")[0]);
// remove id field from the rest of command:
commandClean = commandClean.replaceFirst("#\\d+\\s", "");
} catch (NumberFormatException ex) {
return false; // this means that the command is malformed
} catch (PatternSyntaxException ex) {
return false; // this means that the command is malformed
}
}
// parse command into tokens:
String[] commands = commandClean.split(" ");
commands[0] = commands[0].toUpperCase();
client.setSendMsgId(msgId);
try {
CommandProcessor cp = getContext().getCommandProcessors().get(commands[0]);
if (cp != null) {
List<String> args = new ArrayList<String>(Arrays.asList(commands));
args.remove(0);
try {
boolean ret = cp.process(client, args);
if (!ret) {
return false;
}
} catch (CommandProcessingException ex) {
LOG.debug(
cp.getClass().getCanonicalName()
+ " failed to handle command from client: \""
+ Misc.makeSentence(commands)
+ "\"",
ex);
return false;
}
} else if (deprecatedCommands.containsKey(commands[0])) {
DeprecatedCommand deprecatedCommand = deprecatedCommands.get(commands[0]);
client.sendLine(
String.format(
"SERVERMSG Command %s is deprecated: %s",
deprecatedCommand.getName(), deprecatedCommand.getMessage()));
} else {
// unknown command!
return false;
}
} finally {
client.setSendMsgId(Client.NO_MSG_ID);
}
return true;
}