Add m_conn_waitpong, require clients to reply with a correct PONG to a server PING before they can connect

git-svn-id: http://svn.inspircd.org/repository/trunk/inspircd@2938 e03df62e-2008-0410-955e-edbf42e46eb7

1 files changed, 139 insertions, 0 deletions

diff --git a/src/modules/m_conn_waitpong.cpp b/src/modules/m_conn_waitpong.cpp
new file mode 100644
index 000000000..5d4a9e94c
--- /dev/null
+++ b/src/modules/m_conn_waitpong.cpp
@@ -0,0 +1,139 @@
+#include <stdlib.h>
+#include <string>
+#include "aes.h"
+#include "users.h"
+#include "channels.h"
+#include "modules.h"
+#include "helperfuncs.h"
+
+/* $ModDesc: Forces connecting clients to send a PONG message back to the server before they can complete their connection */
+
+static std::string RandString(unsigned int length)
+{
+	unsigned char* tmp = new unsigned char[(length/4)*3];
+	
+	for(unsigned int i = 0; i < (length/4)*3; i++)
+		tmp[i] = (unsigned char)rand();
+		
+	unsigned char* out = new unsigned char[length];	
+
+	to64frombits(out, tmp, (length/4)*3);
+	
+	std::string ret((char*)out);
+
+	delete out;
+	delete tmp;
+	
+	return ret;
+}
+
+class ModuleWaitPong : public Module
+{
+	Server* Srv;
+	ConfigReader* Conf;
+	
+	bool sendsnotice;
+	bool killonbadreply;
+
+ public:
+	ModuleWaitPong(Server* Me)
+		: Module::Module(Me)
+	{
+		Srv = Me;
+		OnRehash("");
+	}
+	
+	virtual void OnRehash(std::string param)
+	{
+		Conf = new ConfigReader;
+		
+		sendsnotice = Conf->ReadFlag("waitpong", "sendsnotice", 0);
+		
+		if(Conf->GetError() == CONF_VALUE_NOT_FOUND)
+			sendsnotice = true;
+		
+		killonbadreply = Conf->ReadFlag("waitpong", "killonbadreply", 0);
+
+		if(Conf->GetError() == CONF_VALUE_NOT_FOUND)
+			killonbadreply = true;
+				
+		delete Conf;
+	}
+
+	void Implements(char* List)
+	{
+		List[I_OnUserRegister] = List[I_OnCheckReady] = List[I_OnUserDisconnect] = List[I_OnPreCommand] = List[I_OnRehash] = 1;
+	}
+
+	virtual void OnUserRegister(userrec* user)
+	{
+		std::string* pingrpl = new std::string;
+		*pingrpl = RandString(10);
+		
+		Srv->Send(user->fd, "PING :" + *pingrpl);
+		
+		if(sendsnotice)
+			WriteServ(user->fd, "NOTICE %s :*** If you are having problems connecting due to ping timeouts, please type /quote PONG %s or /raw PONG %s now.", user->nick, pingrpl->c_str(), pingrpl->c_str());
+			
+		user->Extend("waitpong_pingstr", (char*)pingrpl);
+	}
+	
+	virtual int OnPreCommand(std::string command, char** parameters, int pcnt,	userrec* user,	bool validated)
+	{
+		if(command == "PONG")
+		{
+			std::string* pingrpl = (std::string*)user->GetExt("waitpong_pingstr");
+			
+			if(pingrpl && (*pingrpl == parameters[0]))
+			{
+				delete pingrpl;
+				user->Shrink("waitpong_pingstr");
+				return 1;
+			}
+			else if(killonbadreply)
+			{
+				Srv->QuitUser(user, "Incorrect ping reply for registration");
+			}
+		}
+		
+		return 0;
+	}
+
+	virtual bool OnCheckReady(userrec* user)
+	{
+		return (!user->GetExt("waitpong_pingstr"));
+	}
+		
+	virtual ~ModuleWaitPong()
+	{
+	}
+	
+	virtual Version GetVersion()
+	{
+		return Version(1, 0, 0, 0, VF_VENDOR);
+	}
+	
+};
+
+class ModuleWaitPongFactory : public ModuleFactory
+{
+ public:
+	ModuleWaitPongFactory()
+	{
+	}
+	
+	~ModuleWaitPongFactory()
+	{
+	}
+	
+	virtual Module * CreateModule(Server* Me)
+	{
+		return new ModuleWaitPong(Me);
+	}
+};
+
+
+extern "C" void * init_module( void )
+{
+	return new ModuleWaitPongFactory;
+}