Added PPPLCPExtension (allows additional codes for LCP).

Added Control() op codes for report enabling/disabling.
Fixed memory leaks in StateMachine and LCP (packets were not freed).
Some minor changes.


git-svn-id: file:///srv/svn/repos/haiku/trunk/current@4514 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/tests/kits/net/ppp/headers/KPPPDefs.h

@@ -49,9 +49,9 @@ enum PPP_EVENT {
 	PPP_RXR_EVENT
 };
 
-// LCP protocol types as defined in RFC 1661
+// LCP protocol codes as defined in RFC 1661
 // ToDo: add LCP extensions
-enum PPP_LCP_TYPE {
+enum PPP_LCP_CODE {
 	PPP_CONFIGURE_REQUEST = 1,
 	PPP_CONFIGURE_ACK = 2,
 	PPP_CONFIGURE_NAK = 3,

src/tests/kits/net/ppp/headers/KPPPDevice.h

@@ -8,8 +8,6 @@
 #ifndef _K_PPP_DEVICE__H
 #define _K_PPP_DEVICE__H
 
-#include <driver_settings.h>
-
 #include <KPPPDefs.h>
 
 #ifndef _K_PPP_INTERFACE__H
@@ -78,14 +76,13 @@ class PPPDevice {
 		void DownEvent();
 
 	protected:
+		uint32 fMTU;
 		bool fIsUp;
 
 	private:
 		char fName[PPP_HANDLER_NAME_LENGTH_LIMIT + 1];
 		PPPInterface& fInterface;
 		driver_parameter *fSettings;
-		
-		uint32 fMTU;
 };
 
 

src/tests/kits/net/ppp/headers/KPPPEncapsulator.h

@@ -8,12 +8,8 @@
 #ifndef _K_PPP_ENCAPSULATOR__H
 #define _K_PPP_ENCAPSULATOR__H
 
-#include <driver_settings.h>
-
 #include <KPPPDefs.h>
 
-class PPPInterface;
-
 #ifndef _K_PPP_INTERFACE__H
 #include <KPPPInterface.h>
 #endif

src/tests/kits/net/ppp/headers/KPPPLCP.h

@@ -23,6 +23,7 @@
 #endif
 
 class PPPEncapsulator;
+class PPPLCPExtension;
 class PPPOptionHandler;
 
 
@@ -30,7 +31,7 @@ typedef struct ppp_lcp_packet {
 	uint8 code;
 	uint8 id;
 	uint16 length;
-	int8 data[0];
+	uint8 data[0];
 } ppp_lcp_packet;
 
 
@@ -56,6 +57,12 @@ class PPPLCP : public PPPProtocol {
 			{ return fOptionHandlers.CountItems(); }
 		PPPOptionHandler *OptionHandlerAt(int32 index) const;
 		
+		bool AddLCPExtension(PPPLCPExtension *extension);
+		bool RemoveLCPExtension(PPPLCPExtension *extension);
+		int32 CountLCPExtensions() const
+			{ return fLCPExtensions.CountItems(); }
+		PPPLCPExtension *LCPExtensionAt(int32 index) const;
+		
 		PPPEncapsulator *Target() const
 			{ return fTarget; }
 		void SetTarget(PPPEncapsulator *target)
@@ -78,6 +85,7 @@ class PPPLCP : public PPPProtocol {
 		PPPStateMachine& fStateMachine;
 		
 		List<PPPOptionHandler*> fOptionHandlers;
+		List<PPPLCPExtension*> fLCPExtensions;
 		
 		PPPEncapsulator *fTarget;
 };

src/tests/kits/net/ppp/headers/KPPPLCPExtension.h

@@ -0,0 +1,60 @@
+//----------------------------------------------------------------------
+//  This software is part of the OpenBeOS distribution and is covered 
+//  by the OpenBeOS license.
+//
+//  Copyright (c) 2003 Waldemar Kornewald, Waldemar.Kornewald@web.de
+//---------------------------------------------------------------------
+
+#ifndef __K_PPP_LCP_EXTENSION__H
+#define __K_PPP_LCP_EXTENSION__H
+
+#include <KPPPDefs.h>
+
+#ifndef _K_PPP_INTERFACE__H
+#include <KPPPInterface.h>
+#endif
+
+
+class PPPLCPExtension {
+	public:
+		PPPLCPExtension(const char *name, uint8 code, PPPInterface& interface,
+			driver_parameter *settings);
+		virtual ~PPPLCPExtension();
+		
+		virtual status_t InitCheck() const;
+		
+		const char *Name() const
+			{ return fName; }
+		
+		PPPInterface& Interface() const
+			{ return fInterface; }
+		driver_parameter *Settings() const
+			{ return fSettings; }
+		
+		void SetEnabled(bool enabled = true)
+			{ fEnabled = enabled; }
+		bool IsEnabled() const
+			{ return fEnabled; }
+		
+		uint8 Code() const
+			{ return fCode; }
+		
+		virtual status_t Control(uint32 op, void *data, size_t length);
+		
+		virtual void Reset();
+		
+		virtual status_t Receive(struct mbuf *packet, uint8 code) = 0;
+		
+		virtual void Pulse();
+
+	private:
+		char fName[PPP_HANDLER_NAME_LENGTH_LIMIT + 1];
+		PPPInterface& fInterface;
+		driver_parameter *fSettings;
+		uint8 fCode;
+		
+		bool fEnabled;
+};
+
+
+#endif

src/tests/kits/net/ppp/headers/KPPPOptionHandler.h

@@ -8,8 +8,6 @@
 #ifndef _K_PPP_OPTION_HANDLER__H
 #define _K_PPP_OPTION_HANDLER__H
 
-#include <driver_settings.h>
-
 #include <KPPPDefs.h>
 
 #ifndef _K_PPP_INTERFACE__H
@@ -35,7 +33,8 @@ class PPPOptionHandler {
 		driver_parameter *Settings() const
 			{ return fSettings; }
 		
-		void SetEnabled(bool enabled = true);
+		void SetEnabled(bool enabled = true)
+			{ fEnabled = enabled; }
 		bool IsEnabled() const
 			{ return fEnabled; }
 		

src/tests/kits/net/ppp/headers/KPPPReportDefs.h

@@ -1,21 +0,0 @@
-//----------------------------------------------------------------------
-//  This software is part of the OpenBeOS distribution and is covered 
-//  by the OpenBeOS license.
-//
-//  Copyright (c) 2003 Waldemar Kornewald, Waldemar.Kornewald@web.de
-//---------------------------------------------------------------------
-
-#ifndef _K_PPP_REPORT_DEFS__H
-#define _K_PPP_REPORT_DEFS__H
-
-#include <PPPReportDefs.h>
-
-
-typedef struct ppp_report_request {
-	thread_id thread;
-	int32 type;
-	int32 flags;
-} ppp_report_request;
-
-
-#endif

src/tests/kits/net/ppp/headers/KPPPReportManager.h

@@ -10,7 +10,8 @@
 
 #include <OS.h>
 
-#include <KPPPReportDefs.h>
+#include <KPPPDefs.h>
+#include <PPPReportDefs.h>
 
 #include <List.h>
 
@@ -23,7 +24,7 @@ class PPPReportManager {
 		~PPPReportManager();
 		
 		void EnableReports(PPP_REPORT_TYPE type, thread_id thread,
-				int32 flags = PPP_NO_REPORT_FLAGS);
+				int32 flags = PPP_NO_FLAGS);
 		void DisableReports(PPP_REPORT_TYPE type, thread_id thread);
 		bool DoesReport(PPP_REPORT_TYPE type, thread_id thread);
 		bool Report(PPP_REPORT_TYPE type, int32 code, void *data, int32 length);

src/tests/kits/net/ppp/headers/KPPPStateMachine.h

@@ -11,7 +11,6 @@
 #include <KPPPDefs.h>
 
 class PPPEncapsulator;
-class PPPInterface;
 class PPPProtocol;
 
 #ifndef _K_PPP_INTERFACE__H
@@ -106,7 +105,8 @@ class PPPStateMachine {
 		void RCNEvent(struct mbuf *packet);
 		void RTREvent(struct mbuf *packet);
 		void RTAEvent(struct mbuf *packet);
-		void RUCEvent(struct mbuf *packet, uint16 protocol, uint8 type = PPP_PROTOCOL_REJECT);
+		void RUCEvent(struct mbuf *packet, uint16 protocol,
+			uint8 code = PPP_PROTOCOL_REJECT);
 		void RXJGoodEvent(struct mbuf *packet);
 		void RXJBadEvent(struct mbuf *packet);
 		void RXREvent(struct mbuf *packet);
@@ -128,8 +128,8 @@ class PPPStateMachine {
 		void SendConfigureAck(struct mbuf *packet);
 		void SendConfigureNak(struct mbuf *packet);
 		void SendTerminateRequest();
-		void SendTerminateAck(struct mbuf *request);
-		void SendCodeReject(struct mbuf *packet, uint16 protocol, uint8 type);
+		void SendTerminateAck(struct mbuf *request = NULL);
+		void SendCodeReject(struct mbuf *packet, uint16 protocol, uint8 code);
 		void SendEchoReply(struct mbuf *request);
 		
 		void BringHandlersUp();

src/tests/kits/net/ppp/headers/PPPControl.h

@@ -22,7 +22,6 @@
 #define PPP_OPTION_HANDLER_OPS_START		PPP_OPS_START + 5 * PPP_RESERVE_OPS_COUNT
 #define PPP_LCP_EXTENSION_OPS_START			PPP_OPS_START + 6 * PPP_RESERVE_OPS_COUNT
 #define PPP_COMMON_OPS_START				PPP_OPS_START + 10 * PPP_RESERVE_OPS_COUNT
-#define PPP_COMMON_PROTO_ENCAPS_OPS_START	PPP_OPS_START + 11 * PPP_RESERVE_OPS_COUNT
 #define PPP_USER_OPS_START					PPP_OPS_START + 32 * PPP_RESERVE_OPS_COUNT
 
 
@@ -34,6 +33,11 @@ enum PPP_CONTROL_OPS {
 	PPPC_SET_DIAL_ON_DEMAND,
 	PPPC_SET_AUTO_REDIAL,
 	
+	// these control ops use the ppp_report_request structure
+	PPPC_ENABLE_INTERFACE_REPORTS,
+	PPPC_DISABLE_INTERFACE_REPORTS,
+		// flags are not used for this control op
+	
 	// handler access
 	PPPC_CONTROL_DEVICE,
 	PPPC_CONTROL_PROTOCOL,
@@ -49,31 +53,13 @@ enum PPP_CONTROL_OPS {
 	PPPC_SET_MTU,
 	// -----------------------------------------------------
 	
-	// -----------------------------------------------------
-	// PPPProtocol
-	// -----------------------------------------------------
-	
-	// -----------------------------------------------------
-	// PPPEncapsulator
-	// -----------------------------------------------------
-	
-	// -----------------------------------------------------
-	// PPPOptionHandler
-	PPPC_GET_OPTION_HANDLER_INFO = PPP_OPTION_HANDLER_OPS_START,
-	// -----------------------------------------------------
-	
-	// -----------------------------------------------------
-	// PPPLCPExtension
-	// -----------------------------------------------------
-	
 	// -----------------------------------------------------
 	// Common/mixed ops
 	PPPC_GET_HANDLER_INFO = PPP_COMMON_OPS_START,
+		// PPPProtocol and PPPEncapsulator
 	PPPC_SET_ENABLED,
-	// -----------------------------------------------------
-	
-	// -----------------------------------------------------
-	// PPPProtocol and PPPEncapsulator
+	PPPC_GET_SIMPLE_HANDLER_INFO,
+		// PPPOptionHandler and PPPLCPExtension
 	// -----------------------------------------------------
 	
 	PPP_CONTROL_OPS_END = B_DEVICE_OP_CODES_END + 0xFFFF
@@ -166,17 +152,19 @@ typedef struct ppp_handler_info_t {
 } ppp_handler_info_t;
 
 
-typedef struct ppp_option_handler_info {
+typedef struct ppp_simple_handler_info {
 	char name[PPP_HANDLER_NAME_LENGTH_LIMIT + 1];
 	
 	const driver_parameter *settings;
-	
 	bool isEnabled;
-} ppp_option_handler_info;
-typedef struct ppp_option_handler_info_t {
-	ppp_option_handler_info info;
-	uint8 _reserved_[_PPP_INFO_T_SIZE_ - sizeof(ppp_option_handler_info)];
-} ppp_option_handler_info_t;
+	
+	uint8 code;
+		// only PPPLCPExtension
+} ppp_simple_handler_info;
+typedef struct ppp_simple_handler_info_t {
+	ppp_simple_handler_info info;
+	uint8 _reserved_[_PPP_INFO_T_SIZE_ - sizeof(ppp_simple_handler_info)];
+} ppp_simple_handler_info_t;
 
 
 #endif

src/tests/kits/net/ppp/headers/PPPDefs.h

@@ -8,7 +8,7 @@
 #ifndef _PPP_DEFS__H
 #define _PPP_DEFS__H
 
-#include <Errors.h>
+#include <SupportDefs.h>
 
 
 // various constants

src/tests/kits/net/ppp/headers/PPPReportDefs.h

@@ -18,7 +18,6 @@
 
 // report flags
 enum PPP_REPORT_FLAGS {
-	PPP_NO_REPORT_FLAGS = 0,
 	PPP_WAIT_FOR_REPLY = 0x1,
 	PPP_REMOVE_AFTER_REPORT = 0x2,
 	PPP_NO_REPLY_TIMEOUT = 0x4
@@ -27,8 +26,11 @@ enum PPP_REPORT_FLAGS {
 // report types
 // the first 16 report types are reserved for the interface manager
 enum PPP_REPORT_TYPE {
+	PPP_ALL_REPORTS = -1,
+		// used only when disabling reports
 	PPP_DESTRUCTION_REPORT = 16,
 		// the interface is being destroyed (no code is needed)
+		// this report is sent even if it was not requested
 	PPP_CONNECTION_REPORT = 17
 };
 
@@ -54,4 +56,11 @@ typedef struct ppp_report_packet {
 } ppp_report_packet;
 
 
+typedef struct ppp_report_request {
+	PPP_REPORT_TYPE type;
+	thread_id thread;
+	int32 flags;
+} ppp_report_request;
+
+
 #endif

src/tests/kits/net/ppp/src/Jamfile

@@ -13,6 +13,7 @@ R5KernelStaticLibrary kernelppp :
 	KPPPEncapsulator.cpp
 	KPPPInterface.cpp
 	KPPPLCP.cpp
+	KPPPLCPExtension.cpp
 	KPPPOptionHandler.cpp
 	KPPPProtocol.cpp
 	KPPPReportManager.cpp

src/tests/kits/net/ppp/src/KPPPDevice.cpp

@@ -15,7 +15,7 @@
 
 PPPDevice::PPPDevice(const char *name, PPPInterface& interface,
 		driver_parameter *settings)
-	: fInterface(interface), fSettings(settings), fMTU(1500)
+	: fMTU(1500), fIsUp(false), fInterface(interface), fSettings(settings)
 {
 	if(name) {
 		strncpy(fName, name, PPP_HANDLER_NAME_LENGTH_LIMIT);

src/tests/kits/net/ppp/src/KPPPInterface.cpp

@@ -283,6 +283,23 @@ PPPInterface::Control(uint32 op, void *data, size_t length)
 			SetAutoRedial(*((uint32*)data));
 		break;
 		
+		case PPPC_ENABLE_INTERFACE_REPORTS: {
+			if(length < sizeof(ppp_report_request) || !data)
+				return B_ERROR;
+			
+			ppp_report_request *request = (ppp_report_request*) data;
+			ReportManager().EnableReports(request->type, request->thread,
+				request->flags);
+		} break;
+		
+		case PPPC_DISABLE_INTERFACE_REPORTS: {
+			if(length < sizeof(ppp_report_request) || !data)
+				return B_ERROR;
+			
+			ppp_report_request *request = (ppp_report_request*) data;
+			ReportManager().DisableReports(request->type, request->thread);
+		} break;
+		
 		case PPPC_CONTROL_DEVICE: {
 			if(length < sizeof(ppp_control_info) || !data)
 				return B_ERROR;

src/tests/kits/net/ppp/src/KPPPLCP.cpp

@@ -8,6 +8,7 @@
 #include <KPPPInterface.h>
 #include <KPPPDevice.h>
 #include <KPPPEncapsulator.h>
+#include <KPPPLCPExtension.h>
 #include <KPPPOptionHandler.h>
 
 #include <LockerHelper.h>
@@ -19,9 +20,6 @@
 
 #define PPP_PROTOCOL_OVERHEAD				2
 
-// TODO:
-// - add LCP extension handlers
-
 
 PPPLCP::PPPLCP(PPPInterface& interface)
 	: PPPProtocol("LCP", PPP_ESTABLISHMENT_PHASE, PPP_LCP_PROTOCOL,
@@ -80,6 +78,48 @@ PPPLCP::OptionHandlerAt(int32 index) const
 	return handler;
 }
 
+
+bool
+PPPLCP::AddLCPExtension(PPPLCPExtension *extension)
+{
+	if(!extension)
+		return false;
+	
+	LockerHelper locker(StateMachine().Locker());
+	
+	if(Phase() != PPP_DOWN_PHASE)
+		return false;
+			// a running connection may not change
+	
+	return fLCPExtensions.AddItem(extension);
+}
+
+
+bool
+PPPLCP::RemoveLCPExtension(PPPLCPExtension *extension)
+{
+	LockerHelper locker(StateMachine().Locker());
+	
+	if(Phase() != PPP_DOWN_PHASE)
+		return false;
+			// a running connection may not change
+	
+	return fLCPExtensions.RemoveItem(extension);
+}
+
+
+PPPLCPExtension*
+PPPLCP::LCPExtensionAt(int32 index) const
+{
+	PPPLCPExtension *extension = fLCPExtensions.ItemAt(index);
+	
+	if(extension == fLCPExtensions.GetDefaultItem())
+		return NULL;
+	
+	return extension;
+}
+
+
 uint32
 PPPLCP::AdditionalOverhead() const
 {
@@ -163,11 +203,28 @@ PPPLCP::Receive(struct mbuf *packet, uint16 protocol)
 		
 		case PPP_ECHO_REPLY:
 		case PPP_DISCARD_REQUEST:
+			m_freem(packet);
 			// do nothing
 		break;
 		
-		default:
-			StateMachine().RUCEvent(packet, PPP_LCP_PROTOCOL, PPP_CODE_REJECT);
+		default: {
+			status_t result = PPP_UNHANDLED;
+			
+			// try to find LCP extensions that can handle this code
+			PPPLCPExtension *extension;
+			for(int32 index = 0; index < CountLCPExtensions(); index++) {
+				extension = LCPExtensionAt(index);
+				if(extension->IsEnabled() && extension->Code() == data->code)
+					result = extension->Receive(packet, data->code);
+			}
+			
+			if(result == PPP_UNHANDLED) {
+				StateMachine().RUCEvent(packet, PPP_LCP_PROTOCOL, PPP_CODE_REJECT);
+				return PPP_REJECTED;
+			}
+			
+			return result;
+		}
 	}
 	
 	return B_OK;
@@ -178,4 +235,7 @@ void
 PPPLCP::Pulse()
 {
 	StateMachine().TimerEvent();
+	
+	for(int32 index = 0; index < CountLCPExtensions(); index++)
+		LCPExtensionAt(index)->Pulse();
 }

src/tests/kits/net/ppp/src/KPPPLCPExtension.cpp

@@ -0,0 +1,84 @@
+//----------------------------------------------------------------------
+//  This software is part of the OpenBeOS distribution and is covered 
+//  by the OpenBeOS license.
+//
+//  Copyright (c) 2003 Waldemar Kornewald, Waldemar.Kornewald@web.de
+//---------------------------------------------------------------------
+
+#include <KPPPLCPExtension.h>
+
+#include <PPPControl.h>
+
+
+PPPLCPExtension::PPPLCPExtension(const char *name, uint8 code, PPPInterface& interface,
+		driver_parameter *settings)
+	: fInterface(interface), fSettings(settings), fCode(code), fEnabled(true)
+{
+	if(name) {
+		strncpy(fName, name, PPP_HANDLER_NAME_LENGTH_LIMIT);
+		fName[PPP_HANDLER_NAME_LENGTH_LIMIT] = 0;
+	} else
+		strcpy(fName, "???");
+	
+	interface.LCP().AddLCPExtension(this);
+}
+
+
+PPPLCPExtension::~PPPLCPExtension()
+{
+	Interface().LCP().RemoveLCPExtension(this);
+}
+
+
+status_t
+PPPLCPExtension::InitCheck() const
+{
+	if(!Settings())
+		return B_ERROR;
+	
+	return B_OK;
+}
+
+
+status_t
+PPPLCPExtension::Control(uint32 op, void *data, size_t length)
+{
+	switch(op) {
+		case PPPC_GET_SIMPLE_HANDLER_INFO: {
+			if(length < sizeof(ppp_simple_handler_info_t) || !data)
+				return B_ERROR;
+			
+			ppp_simple_handler_info *info = (ppp_simple_handler_info*) data;
+			memset(info, 0, sizeof(ppp_simple_handler_info_t));
+			strcpy(info->name, Name());
+			info->settings = Settings();
+			info->isEnabled = IsEnabled();
+		} break;
+		
+		case PPPC_SET_ENABLED:
+			if(length < sizeof(uint32) || !data)
+				return B_ERROR;
+			
+			SetEnabled(*((uint32*)data));
+		break;
+		
+		default:
+			return PPP_UNHANDLED;
+	}
+	
+	return B_OK;
+}
+
+
+void
+PPPLCPExtension::Reset()
+{
+	// do nothing by default
+}
+
+
+void
+PPPLCPExtension::Pulse()
+{
+	// do nothing by default
+}

src/tests/kits/net/ppp/src/KPPPOptionHandler.cpp

@@ -12,7 +12,7 @@
 
 PPPOptionHandler::PPPOptionHandler(const char *name, PPPInterface& interface,
 		driver_parameter *settings)
-	: fInterface(interface), fSettings(settings)
+	: fInterface(interface), fSettings(settings), fEnabled(true)
 {
 	if(name) {
 		strncpy(fName, name, PPP_HANDLER_NAME_LENGTH_LIMIT);
@@ -44,12 +44,12 @@ status_t
 PPPOptionHandler::Control(uint32 op, void *data, size_t length)
 {
 	switch(op) {
-		case PPPC_GET_OPTION_HANDLER_INFO: {
-			if(length < sizeof(ppp_option_handler_info) || !data)
+		case PPPC_GET_SIMPLE_HANDLER_INFO: {
+			if(length < sizeof(ppp_simple_handler_info_t) || !data)
 				return B_ERROR;
 			
-			ppp_option_handler_info *info = (ppp_option_handler_info*) data;
-			memset(info, 0, sizeof(ppp_option_handler_info));
+			ppp_simple_handler_info *info = (ppp_simple_handler_info*) data;
+			memset(info, 0, sizeof(ppp_simple_handler_info_t));
 			strcpy(info->name, Name());
 			info->settings = Settings();
 			info->isEnabled = IsEnabled();

src/tests/kits/net/ppp/src/KPPPReportManager.cpp

@@ -28,7 +28,7 @@ PPPReportManager::~PPPReportManager()
 
 void
 PPPReportManager::EnableReports(PPP_REPORT_TYPE type, thread_id thread,
-	int32 flags = PPP_NO_REPORT_FLAGS)
+	int32 flags = PPP_NO_FLAGS)
 {
 	LockerHelper locker(fLock);
 	
@@ -54,7 +54,7 @@ PPPReportManager::DisableReports(PPP_REPORT_TYPE type, thread_id thread)
 		if(request->thread != thread)
 			continue;
 		
-		if(request->type == type)
+		if(request->type == type || request->type == PPP_ALL_REPORTS)
 			fReportRequests.RemoveItem(request);
 	}
 }

src/tests/kits/net/ppp/src/KPPPStateMachine.cpp

@@ -11,6 +11,7 @@
 #include <KPPPConfigurePacket.h>
 #include <KPPPDevice.h>
 #include <KPPPEncapsulator.h>
+#include <KPPPLCPExtension.h>
 #include <KPPPOptionHandler.h>
 
 #include <net/if.h>
@@ -701,16 +702,19 @@ PPPStateMachine::RCRGoodEvent(struct mbuf *packet)
 		case PPP_INITIAL_STATE:
 		case PPP_STARTING_STATE:
 			IllegalEvent(PPP_RCR_GOOD_EVENT);
+			m_freem(packet);
 		break;
 		
 		case PPP_CLOSED_STATE:
 			locker.UnlockNow();
-			SendTerminateAck(packet);
+			SendTerminateAck();
+			m_freem(packet);
 		break;
 		
 		case PPP_STOPPED_STATE:
 			// irc,scr,sca/8
 			// XXX: should we do nothing and wait for DownEvent()?
+			m_freem(packet);
 		break;
 		
 		case PPP_REQ_SENT_STATE:
@@ -740,7 +744,7 @@ PPPStateMachine::RCRGoodEvent(struct mbuf *packet)
 		break;
 		
 		default:
-			;
+			m_freem(packet);
 	}
 }
 
@@ -759,7 +763,7 @@ PPPStateMachine::RCRBadEvent(struct mbuf *nak, struct mbuf *reject)
 		
 		case PPP_CLOSED_STATE:
 			locker.UnlockNow();
-			SendTerminateAck(NULL);
+			SendTerminateAck();
 		break;
 		
 		case PPP_STOPPED_STATE:
@@ -787,11 +791,17 @@ PPPStateMachine::RCRBadEvent(struct mbuf *nak, struct mbuf *reject)
 				SendConfigureNak(nak);
 			else if(reject && ntohs(mtod(reject, ppp_lcp_packet*)->length) > 3)
 				SendConfigureNak(reject);
-		break;
+		return;
+			// prevents the nak/reject from being m_freem()'d
 		
 		default:
 			;
 	}
+	
+	if(nak)
+		m_freem(nak);
+	if(reject)
+		m_freem(reject);
 }
 
 
@@ -806,12 +816,13 @@ PPPStateMachine::RCAEvent(struct mbuf *packet)
 		
 		// TODO:
 		// log this event
+		m_freem(packet);
 		return;
 	}
 	
-	PPPOptionHandler *handler;
+	// let the option handlers parse this ack
 	PPPConfigurePacket ack(packet);
-	
+	PPPOptionHandler *handler;
 	for(int32 index = 0; index < LCP().CountOptionHandlers(); index++) {
 		handler = LCP().OptionHandlerAt(index);
 		handler->ParseAck(&ack);
@@ -826,7 +837,7 @@ PPPStateMachine::RCAEvent(struct mbuf *packet)
 		case PPP_CLOSED_STATE:
 		case PPP_STOPPED_STATE:
 			locker.UnlockNow();
-			SendTerminateAck(NULL);
+			SendTerminateAck();
 		break;
 		
 		case PPP_REQ_SENT_STATE:
@@ -859,6 +870,8 @@ PPPStateMachine::RCAEvent(struct mbuf *packet)
 		default:
 			;
 	}
+	
+	m_freem(packet);
 }
 
 
@@ -873,12 +886,13 @@ PPPStateMachine::RCNEvent(struct mbuf *packet)
 		
 		// TODO:
 		// log this event
+		m_freem(packet);
 		return;
 	}
 	
-	PPPOptionHandler *handler;
+	// let the option handlers parse this nak/reject
 	PPPConfigurePacket nak_reject(packet);
-	
+	PPPOptionHandler *handler;
 	for(int32 index = 0; index < LCP().CountOptionHandlers(); index++) {
 		handler = LCP().OptionHandlerAt(index);
 		
@@ -897,7 +911,7 @@ PPPStateMachine::RCNEvent(struct mbuf *packet)
 		case PPP_CLOSED_STATE:
 		case PPP_STOPPED_STATE:
 			locker.UnlockNow();
-			SendTerminateAck(packet);
+			SendTerminateAck();
 		break;
 		
 		case PPP_REQ_SENT_STATE:
@@ -923,6 +937,8 @@ PPPStateMachine::RCNEvent(struct mbuf *packet)
 		default:
 			;
 	}
+	
+	m_freem(packet);
 }
 
 
@@ -943,6 +959,7 @@ PPPStateMachine::RTREvent(struct mbuf *packet)
 		case PPP_INITIAL_STATE:
 		case PPP_STARTING_STATE:
 			IllegalEvent(PPP_RTR_EVENT);
+			m_freem(packet);
 		break;
 		
 		case PPP_ACK_RCVD_STATE:
@@ -984,6 +1001,7 @@ PPPStateMachine::RTAEvent(struct mbuf *packet)
 		
 		// TODO:
 		// log this event
+		m_freem(packet);
 		return;
 	}
 	
@@ -1019,12 +1037,15 @@ PPPStateMachine::RTAEvent(struct mbuf *packet)
 		default:
 			;
 	}
+	
+	m_freem(packet);
 }
 
 
 // receive unknown code
 void
-PPPStateMachine::RUCEvent(struct mbuf *packet, uint16 protocol, uint8 type = PPP_PROTOCOL_REJECT)
+PPPStateMachine::RUCEvent(struct mbuf *packet, uint16 protocol,
+	uint8 code = PPP_PROTOCOL_REJECT)
 {
 	LockerHelper locker(fLock);
 	
@@ -1032,11 +1053,12 @@ PPPStateMachine::RUCEvent(struct mbuf *packet, uint16 protocol, uint8 type = PPP
 		case PPP_INITIAL_STATE:
 		case PPP_STARTING_STATE:
 			IllegalEvent(PPP_RUC_EVENT);
+			m_freem(packet);
 		break;
 		
 		default:
 			locker.UnlockNow();
-			SendCodeReject(packet, protocol, type);
+			SendCodeReject(packet, protocol, code);
 	}
 }
 
@@ -1102,6 +1124,8 @@ PPPStateMachine::RXJBadEvent(struct mbuf *packet)
 			SendTerminateRequest();
 		break;
 	}
+	
+	m_freem(packet);
 }
 
 
@@ -1120,11 +1144,13 @@ PPPStateMachine::RXREvent(struct mbuf *packet)
 		case PPP_OPENED_STATE:
 			if(echo->code == PPP_ECHO_REQUEST)
 				SendEchoReply(packet);
-		break;
+		return;
 		
 		default:
 			;
 	}
+	
+	m_freem(packet);
 }
 
 
@@ -1199,6 +1225,7 @@ PPPStateMachine::RCREvent(struct mbuf *packet)
 			else if(error == B_ERROR) {
 				// the request contains a value that has been sent more than
 				// once or the value is corrupted
+				m_freem(packet);
 				CloseEvent();
 				return;
 			} else if(error == B_OK)
@@ -1226,14 +1253,34 @@ PPPStateMachine::RCREvent(struct mbuf *packet)
 void
 PPPStateMachine::RXJEvent(struct mbuf *packet)
 {
-	ppp_lcp_packet *reject mtod(packet, ppp_lcp_packet*);
+	ppp_lcp_packet *reject = mtod(packet, ppp_lcp_packet*);
 	
 	if(reject->code == PPP_CODE_REJECT) {
-		// we only have basic codes, so there must be something wrong
-		if(Interface()->IsMultilink() && !Interface()->Parent())
-			CloseEvent();
-		else
-			RXJBadEvent(packet);
+		uint8 rejectedCode = reject->data[0];
+		
+		// test if the rejected code belongs to the minimum LCP requirements
+		if(rejectedCode >= PPP_MIN_LCP_CODE && rejectedCode <= PPP_MAX_LCP_CODE) {
+			if(Interface()->IsMultilink() && !Interface()->Parent()) {
+				// Main interfaces do not have states between STARTING and OPENED.
+				// An RXJBadEvent() would enter one of those states which is bad.
+				m_freem(packet);
+				CloseEvent();
+			} else
+				RXJBadEvent(packet);
+			
+			return;
+		}
+		
+		// find the LCP extension and disable it
+		PPPLCPExtension *extension;
+		for(int32 index = 0; index < LCP().CountLCPExtensions(); index++) {
+			extension = LCP().LCPExtensionAt(index);
+			
+			if(extension->Code() == rejectedCode)
+				extension->SetEnabled(false);
+		}
+		
+		m_freem(packet);
 	} else if(reject->code == PPP_PROTOCOL_REJECT) {
 		// disable all handlers for rejected protocol type
 		uint16 rejected = *((uint16*) reject->data);
@@ -1245,6 +1292,7 @@ PPPStateMachine::RXJEvent(struct mbuf *packet)
 			return;
 		}
 		
+		// disable protocols and encapsulators with the rejected protocl number
 		int32 index;
 		PPPProtocol *protocol_handler;
 		PPPEncapsulator *encapsulator_handler = Interface()->FirstEncapsulator();
@@ -1264,10 +1312,13 @@ PPPStateMachine::RXJEvent(struct mbuf *packet)
 		}
 		
 		RXJGoodEvent(packet);
+			// this event handler does not m_freem(packet)!!!
 		
 		// notify parent, too
 		if(Interface()->Parent())
 			Interface()->Parent()->StateMachine().RXJEvent(packet);
+		else
+			m_freem(packet);
 	}
 }
 
@@ -1374,9 +1425,13 @@ PPPStateMachine::SendConfigureRequest()
 void
 PPPStateMachine::SendConfigureAck(struct mbuf *packet)
 {
+	if(!packet)
+		return;
+	
 	mtod(packet, ppp_lcp_packet*)->code = PPP_CONFIGURE_ACK;
 	PPPConfigurePacket ack(packet);
 	
+	// notify all option handlers that we are sending an ack for each value
 	for(int32 index = 0; index < LCP().CountOptionHandlers(); index++)
 		LCP().OptionHandlerAt(index)->SendingAck(&ack);
 	
@@ -1387,6 +1442,9 @@ PPPStateMachine::SendConfigureAck(struct mbuf *packet)
 void
 PPPStateMachine::SendConfigureNak(struct mbuf *packet)
 {
+	if(!packet)
+		return;
+	
 	ppp_lcp_packet *nak = mtod(packet, ppp_lcp_packet*);
 	if(nak->code == PPP_CONFIGURE_NAK) {
 		if(fNakCounter == 0) {
@@ -1424,7 +1482,7 @@ PPPStateMachine::SendTerminateRequest()
 
 
 void
-PPPStateMachine::SendTerminateAck(struct mbuf *request)
+PPPStateMachine::SendTerminateAck(struct mbuf *request = NULL)
 {
 	struct mbuf *reply = request;
 	
@@ -1440,26 +1498,32 @@ PPPStateMachine::SendTerminateAck(struct mbuf *request)
 		
 		ack = mtod(reply, ppp_lcp_packet*);
 		ack->id = NextID();
-		ack->length = 4;
 	}
 	
 	ack = mtod(reply, ppp_lcp_packet*);
 	ack->code = PPP_TERMINATE_ACK;
+	ack->length = 4;
 	
 	LCP().Send(reply);
 }
 
 
 void
-PPPStateMachine::SendCodeReject(struct mbuf *packet, uint16 protocol, uint8 type)
+PPPStateMachine::SendCodeReject(struct mbuf *packet, uint16 protocol, uint8 code)
 {
+	if(!packet)
+		return;
+	
 	int32 length;
 		// additional space needed for this reject
-	if(type == PPP_PROTOCOL_REJECT)
+	if(code == PPP_PROTOCOL_REJECT)
 		length = 6;
 	else
 		length = 4;
 	
+	M_PREPEND(packet, length);
+		// add some space for the header
+	
 	int32 adjust = 0;
 		// adjust packet size by this value if packet is too big
 	if(packet->m_flags & M_PKTHDR) {
@@ -1472,7 +1536,7 @@ PPPStateMachine::SendCodeReject(struct mbuf *packet, uint16 protocol, uint8 type
 		m_adj(packet, adjust);
 	
 	ppp_lcp_packet *reject = mtod(packet, ppp_lcp_packet*);
-	reject->code = type;
+	reject->code = code;
 	reject->id = NextID();
 	if(packet->m_flags & M_PKTHDR)
 		reject->length = htons(packet->m_pkthdr.len);
@@ -1480,7 +1544,7 @@ PPPStateMachine::SendCodeReject(struct mbuf *packet, uint16 protocol, uint8 type
 		reject->length = htons(packet->m_len);
 	
 	protocol = htons(protocol);
-	if(type == PPP_PROTOCOL_REJECT)
+	if(code == PPP_PROTOCOL_REJECT)
 		memcpy(&reject->data, &protocol, sizeof(protocol));
 	
 	LCP().Send(packet);
@@ -1490,6 +1554,9 @@ PPPStateMachine::SendCodeReject(struct mbuf *packet, uint16 protocol, uint8 type
 void
 PPPStateMachine::SendEchoReply(struct mbuf *request)
 {
+	if(!request)
+		return;
+	
 	ppp_lcp_packet *reply = mtod(request, ppp_lcp_packet*);
 	reply->code = PPP_ECHO_REPLY;
 		// the request becomes a reply
@@ -1589,4 +1656,7 @@ PPPStateMachine::ResetOptionHandlers()
 {
 	for(int32 index = 0; index < LCP().CountOptionHandlers(); index++)
 		LCP().OptionHandlerAt(index)->Reset();
+	
+	for(int32 index = 0; index < LCP().CountLCPExtensions(); index++)
+		LCP().LCPExtensionAt(index)->Reset();
 }