diff --git a/src/Cedar/Client.c b/src/Cedar/Client.c
index a5eaaf2c..09172d21 100644
--- a/src/Cedar/Client.c
+++ b/src/Cedar/Client.c
@@ -763,29 +763,6 @@ void CndMsgDlgFree(SOCK *s)
 	ReleaseSock(s);
 }
 
-// The thread to stop the password input dialog client forcibly
-void CncPasswordDlgHaltThread(THREAD *thread, void *param)
-{
-	CNC_CONNECT_ERROR_DLG_THREAD_PARAM *dp = (CNC_CONNECT_ERROR_DLG_THREAD_PARAM *)param;
-	// Validate arguments
-	if (thread == NULL || param == NULL)
-	{
-		return;
-	}
-
-	while (true)
-	{
-		if (dp->Session->Halt || dp->HaltThread)
-		{
-			break;
-		}
-
-		Wait(dp->Event, 100);
-	}
-
-	Disconnect(dp->Sock);
-}
-
 // Show the password input dialog
 bool CncPasswordDlg(SESSION *session, UI_PASSWORD_DLG *dlg)
 {
@@ -1124,41 +1101,6 @@ void CncReleaseSocket()
 	ReleaseSock(s);
 }
 
-// Get the Session ID of the client notification service
-UINT CncGetSessionId()
-{
-	SOCK *s = CncConnect();
-	PACK *p;
-	UINT ret;
-	if (s == NULL)
-	{
-		return INFINITE;
-	}
-
-	p = NewPack();
-	PackAddStr(p, "function", "get_session_id");
-
-	SendPack(s, p);
-	FreePack(p);
-
-	p = RecvPack(s);
-	if (p == NULL)
-	{
-		Disconnect(s);
-		ReleaseSock(s);
-		return INFINITE;
-	}
-
-	ret = PackGetInt(p, "session_id");
-
-	FreePack(p);
-
-	Disconnect(s);
-	ReleaseSock(s);
-
-	return ret;
-}
-
 // Terminate the process of the client notification service
 void CncExit()
 {
@@ -2039,28 +1981,6 @@ bool CiHasAccountSensitiveInformation(BUF *b)
 
 	return ret;
 }
-bool CiHasAccountSensitiveInformationFile(wchar_t *name)
-{
-	bool ret = false;
-	BUF *b;
-	// Validate arguments
-	if (name == NULL)
-	{
-		return false;
-	}
-
-	b = ReadDumpW(name);
-	if (b == NULL)
-	{
-		return false;
-	}
-
-	ret = CiHasAccountSensitiveInformation(b);
-
-	FreeBuf(b);
-
-	return ret;
-}
 
 // Delete the sensitive information in the account information
 bool CiEraseSensitiveInAccount(BUF *b)
@@ -10373,35 +10293,6 @@ void CiWriteSettingToCfg(CLIENT *c, FOLDER *root)
 	}
 }
 
-// Create the inner VPN Server
-SERVER *CiNewInnerVPNServer(CLIENT *c, bool relay_server)
-{
-	SERVER *s = NULL;
-	// Validate arguments
-	if (c == NULL)
-	{
-		return NULL;
-	}
-
-	SetNatTLowPriority();
-
-	s = SiNewServerEx(false, true, relay_server);
-
-	return s;
-}
-
-// Stop the inner VPN Server
-void CiFreeInnerVPNServer(CLIENT *c, SERVER *s)
-{
-	// Validate arguments
-	if (c == NULL || s == NULL)
-	{
-		return;
-	}
-
-	SiReleaseServer(s);
-}
-
 // Apply settings of Inner VPN Server
 void CiApplyInnerVPNServerConfig(CLIENT *c)
 {
@@ -10585,48 +10476,6 @@ CLIENT *CiNewClient()
 	return c;
 }
 
-// Examine whether two proxy server settings equal
-bool CompareInternetSetting(INTERNET_SETTING *s1, INTERNET_SETTING *s2)
-{
-	// Validate arguments
-	if (s1 == NULL || s2 == NULL)
-	{
-		return false;
-	}
-
-	if (s1->ProxyType != s2->ProxyType)
-	{
-		return false;
-	}
-
-	if (s1->ProxyType == PROXY_DIRECT)
-	{
-		return true;
-	}
-
-	if (s1->ProxyPort != s2->ProxyPort)
-	{
-		return false;
-	}
-
-	if (StrCmp(s1->ProxyHostName, s2->ProxyHostName) != 0)
-	{
-		return false;
-	}
-
-	if (StrCmp(s1->ProxyUsername, s2->ProxyUsername) != 0)
-	{
-		return false;
-	}
-
-	if (StrCmp(s1->ProxyPassword, s2->ProxyPassword) != 0)
-	{
-		return false;
-	}
-
-	return true;
-}
-
 // Send a global pulse
 void CiSendGlobalPulse(CLIENT *c)
 {
@@ -10781,20 +10630,6 @@ void CiDecrementNumActiveSessions()
 	Unlock(ci_active_sessions_lock);
 }
 
-// Get the number of active sessions
-UINT CiGetNumActiveSessions()
-{
-	UINT ret;
-
-	Lock(ci_active_sessions_lock);
-	{
-		ret = ci_num_active_sessions;
-	}
-	Unlock(ci_active_sessions_lock);
-
-	return ret;
-}
-
 // Release the client
 void CtReleaseClient(CLIENT *c)
 {
diff --git a/src/Cedar/Client.h b/src/Cedar/Client.h
index 9e2f2ffe..f203be98 100644
--- a/src/Cedar/Client.h
+++ b/src/Cedar/Client.h
@@ -598,9 +598,6 @@ void CcSetServiceToForegroundProcess(REMOTE_CLIENT *r);
 char *CiGetFirstVLan(CLIENT *c);
 void CiNormalizeAccountVLan(CLIENT *c);
 
-bool CompareInternetSetting(INTERNET_SETTING *s1, INTERNET_SETTING *s2);
-
-
 void CnStart();
 void CnListenerProc(THREAD *thread, void *param);
 
@@ -642,7 +639,6 @@ SOCK *CncConnect();
 SOCK *CncConnectEx(UINT timeout);
 void CncReleaseSocket();
 void CncExit();
-UINT CncGetSessionId();
 bool CncExecDriverInstaller(char *arg);
 SOCK *CncStatusPrinterWindowStart(SESSION *s);
 void CncStatusPrinterWindowPrint(SOCK *s, wchar_t *str);
@@ -651,7 +647,6 @@ void CncStatusPrinterWindowThreadProc(THREAD *thread, void *param);
 bool CncConnectErrorDlg(SESSION *session, UI_CONNECTERROR_DLG *dlg);
 void CncConnectErrorDlgHaltThread(THREAD *thread, void *param);
 bool CncPasswordDlg(SESSION *session, UI_PASSWORD_DLG *dlg);
-void CncPasswordDlgHaltThread(THREAD *thread, void *param);
 void CncCheckCert(SESSION *session, UI_CHECKCERT *dlg);
 void CncCheckCertHaltThread(THREAD *thread, void *param);
 bool CncSecureSignDlg(SECURE_SIGN *sign);
@@ -793,13 +788,9 @@ bool CiTryToParseAccount(BUF *b);
 bool CiTryToParseAccountFile(wchar_t *name);
 bool CiEraseSensitiveInAccount(BUF *b);
 bool CiHasAccountSensitiveInformation(BUF *b);
-bool CiHasAccountSensitiveInformationFile(wchar_t *name);
 void CiApplyInnerVPNServerConfig(CLIENT *c);
-SERVER *CiNewInnerVPNServer(CLIENT *c, bool relay_server);
-void CiFreeInnerVPNServer(CLIENT *c, SERVER *s);
 void CiIncrementNumActiveSessions();
 void CiDecrementNumActiveSessions();
-UINT CiGetNumActiveSessions();
 
 BUF *EncryptPassword(char *password);
 BUF *EncryptPassword2(char *password);
diff --git a/src/Cedar/Command.c b/src/Cedar/Command.c
index 76b2a3cc..16bd67ea 100644
--- a/src/Cedar/Command.c
+++ b/src/Cedar/Command.c
@@ -9736,39 +9736,6 @@ bool CmdEvalIpAndMask6(CONSOLE *c, wchar_t *str, void *param)
 
 	return true;
 }
-bool CmdEvalIpAndMask46(CONSOLE *c, wchar_t *str, void *param)
-{
-	char tmp[MAX_SIZE];
-	TOKEN_LIST *t;
-	bool ret = false;
-
-	Zero(tmp, sizeof(tmp));
-	UniToStr(tmp, sizeof(tmp), str);
-
-	t = ParseToken(tmp, "/");
-	if (t == NULL)
-	{
-		return false;
-	}
-
-	if (t->NumTokens >= 1)
-	{
-		Trim(t->Token[0]);
-
-		if (IsIpStr4(t->Token[0]))
-		{
-			ret = CmdEvalIpAndMask4(c, str, param);
-		}
-		else
-		{
-			ret = CmdEvalIpAndMask6(c, str, param);
-		}
-	}
-
-	FreeToken(t);
-
-	return ret;
-}
 
 // Evaluate the network address and the subnet mask
 bool CmdEvalNetworkAndSubnetMask4(CONSOLE *c, wchar_t *str, void *param)
@@ -9823,39 +9790,6 @@ bool CmdEvalNetworkAndSubnetMask6(CONSOLE *c, wchar_t *str, void *param)
 
 	return true;
 }
-bool CmdEvalNetworkAndSubnetMask46(CONSOLE *c, wchar_t *str, void *param)
-{
-	char tmp[MAX_SIZE];
-	TOKEN_LIST *t;
-	bool ret = false;
-
-	Zero(tmp, sizeof(tmp));
-	UniToStr(tmp, sizeof(tmp), str);
-
-	t = ParseToken(tmp, "/");
-	if (t == NULL)
-	{
-		return false;
-	}
-
-	if (t->NumTokens >= 1)
-	{
-		Trim(t->Token[0]);
-
-		if (IsIpStr4(t->Token[0]))
-		{
-			ret = CmdEvalNetworkAndSubnetMask4(c, str, param);
-		}
-		else
-		{
-			ret = CmdEvalNetworkAndSubnetMask6(c, str, param);
-		}
-	}
-
-	FreeToken(t);
-
-	return ret;
-}
 
 // Evaluate the IP address and subnet mask
 bool CmdEvalHostAndSubnetMask4(CONSOLE *c, wchar_t *str, void *param)
@@ -22763,28 +22697,6 @@ UINT PsListenerDelete(CONSOLE *c, char *cmd_name, wchar_t *str, void *param)
 	return 0;
 }
 
-// Draw a row
-void CmdPrintRow(CONSOLE *c, wchar_t *title, wchar_t *tag, ...)
-{
-	wchar_t buf[MAX_SIZE * 2];
-	wchar_t buf2[MAX_SIZE * 2];
-	va_list args;
-	// Validate arguments
-	if (title == NULL || c == NULL || tag == NULL)
-	{
-		return;
-	}
-
-	va_start(args, tag);
-	UniFormatArgs(buf, sizeof(buf), tag, args);
-
-	UniFormat(buf2, sizeof(buf2), L"[%s] %s", title, buf);
-
-	va_end(args);
-
-	c->Write(c, buf2);
-}
-
 // ServerInfoGet command
 UINT PsServerInfoGet(CONSOLE *c, char *cmd_name, wchar_t *str, void *param)
 {
diff --git a/src/Cedar/Command.h b/src/Cedar/Command.h
index 6708fc92..e33a182d 100644
--- a/src/Cedar/Command.h
+++ b/src/Cedar/Command.h
@@ -325,7 +325,6 @@ void InRpcTtResult(PACK *p, TT_RESULT *t);
 
 void CmdPrintError(CONSOLE *c, UINT err);
 void CmdPrintAbout(CONSOLE *c);
-void CmdPrintRow(CONSOLE *c, wchar_t *title, wchar_t *tag, ...);
 wchar_t *CmdPromptPort(CONSOLE *c, void *param);
 wchar_t *CmdPromptChoosePassword(CONSOLE *c, void *param);
 bool CmdEvalPort(CONSOLE *c, wchar_t *str, void *param);
@@ -346,10 +345,8 @@ wchar_t *GetConnectionTypeStr(UINT type);
 bool CmdEvalHostAndSubnetMask4(CONSOLE *c, wchar_t *str, void *param);
 bool CmdEvalNetworkAndSubnetMask4(CONSOLE *c, wchar_t *str, void *param);
 bool CmdEvalNetworkAndSubnetMask6(CONSOLE *c, wchar_t *str, void *param);
-bool CmdEvalNetworkAndSubnetMask46(CONSOLE *c, wchar_t *str, void *param);
 bool CmdEvalIpAndMask4(CONSOLE *c, wchar_t *str, void *param);
 bool CmdEvalIpAndMask6(CONSOLE *c, wchar_t *str, void *param);
-bool CmdEvalIpAndMask46(CONSOLE *c, wchar_t *str, void *param);
 wchar_t *GetLogSwitchStr(UINT i);
 wchar_t *GetPacketLogNameStr(UINT i);
 UINT StrToLogSwitchType(char *str);
diff --git a/src/Cedar/Hub.c b/src/Cedar/Hub.c
index 82e00ff7..d654554e 100644
--- a/src/Cedar/Hub.c
+++ b/src/Cedar/Hub.c
@@ -6659,34 +6659,6 @@ void SetRadiusServerEx(HUB *hub, char *name, UINT port, char *secret, UINT inter
 	Unlock(hub->RadiusOptionLock);
 }
 
-// Get the difference between the traffic data
-void CalcTrafficEntryDiff(TRAFFIC_ENTRY *diff, TRAFFIC_ENTRY *old, TRAFFIC_ENTRY *current)
-{
-	// Validate arguments
-	Zero(diff, sizeof(TRAFFIC_ENTRY));
-	if (old == NULL || current == NULL || diff == NULL)
-	{
-		return;
-	}
-
-	if (current->BroadcastCount >= old->BroadcastCount)
-	{
-		diff->BroadcastCount = current->BroadcastCount - old->BroadcastCount;
-	}
-	if (current->BroadcastBytes >= old->BroadcastBytes)
-	{
-		diff->BroadcastBytes = current->BroadcastBytes - old->BroadcastBytes;
-	}
-	if (current->UnicastCount >= old->UnicastCount)
-	{
-		diff->UnicastCount = current->UnicastCount - old->UnicastCount;
-	}
-	if (current->UnicastBytes >= old->UnicastBytes)
-	{
-		diff->UnicastBytes = current->UnicastBytes - old->UnicastBytes;
-	}
-}
-
 // Add the traffic information for Virtual HUB
 void IncrementHubTraffic(HUB *h)
 {
diff --git a/src/Cedar/Hub.h b/src/Cedar/Hub.h
index 85ccc3de..9360d276 100644
--- a/src/Cedar/Hub.h
+++ b/src/Cedar/Hub.h
@@ -638,7 +638,6 @@ USERLIST *FindUserList(LIST *o, char *filename);
 bool IsUserMatchInUserList(LIST *o, char *filename, UINT64 user_hash);
 bool IsUserMatchInUserListWithCacheExpires(LIST *o, char *filename, UINT64 user_hash, UINT64 lifetime);
 bool IsUserMatchInUserListWithCacheExpiresAcl(LIST *o, char *name_in_acl, UINT64 user_hash, UINT64 lifetime);
-void CalcTrafficEntryDiff(TRAFFIC_ENTRY *diff, TRAFFIC_ENTRY *old, TRAFFIC_ENTRY *current);
 bool CheckMaxLoggedPacketsPerMinute(SESSION *s, UINT max_packets, UINT64 now);
 void VgsSetUserAgentValue(char *str);
 void VgsSetEmbTag(bool b);
diff --git a/src/Cedar/Protocol.c b/src/Cedar/Protocol.c
index 501b7eff..4bdf516e 100644
--- a/src/Cedar/Protocol.c
+++ b/src/Cedar/Protocol.c
@@ -903,95 +903,6 @@ void NodeInfoToStr(wchar_t *str, UINT size, NODE_INFO *info)
 		info->HubName, unique_id);
 }
 
-// Comparison of node information
-bool CompareNodeInfo(NODE_INFO *a, NODE_INFO *b)
-{
-	// Validate arguments
-	if (a == NULL || b == NULL)
-	{
-		return false;
-	}
-
-	if (StrCmp(a->ClientProductName, b->ClientProductName) != 0)
-	{
-		return false;
-	}
-	if (a->ClientProductVer != b->ClientProductVer)
-	{
-		return false;
-	}
-	if (a->ClientProductBuild != b->ClientProductBuild)
-	{
-		return false;
-	}
-	if (StrCmp(a->ServerProductName, b->ServerProductName) != 0)
-	{
-		return false;
-	}
-	if (a->ServerProductVer != b->ServerProductVer)
-	{
-		return false;
-	}
-	if (a->ServerProductBuild != b->ServerProductBuild)
-	{
-		return false;
-	}
-	if (StrCmp(a->ClientOsName, b->ClientOsName) != 0)
-	{
-		return false;
-	}
-	if (StrCmp(a->ClientOsVer, b->ClientOsVer) != 0)
-	{
-		return false;
-	}
-	if (StrCmp(a->ClientOsProductId, b->ClientOsProductId) != 0)
-	{
-		return false;
-	}
-	if (StrCmp(a->ClientHostname, b->ClientHostname) != 0)
-	{
-		return false;
-	}
-	if (a->ClientIpAddress != b->ClientIpAddress)
-	{
-		return false;
-	}
-	if (StrCmp(a->ServerHostname, b->ServerHostname) != 0)
-	{
-		return false;
-	}
-	if (a->ServerIpAddress != b->ServerIpAddress)
-	{
-		return false;
-	}
-	if (a->ServerPort != b->ServerPort)
-	{
-		return false;
-	}
-	if (StrCmp(a->ProxyHostname, b->ProxyHostname) != 0)
-	{
-		return false;
-	}
-	if (a->ProxyIpAddress != b->ProxyIpAddress)
-	{
-		return false;
-	}
-	if (a->ProxyPort != b->ProxyPort)
-	{
-		return false;
-	}
-	if (StrCmp(a->HubName, b->HubName) != 0)
-	{
-		return false;
-	}
-	if (Cmp(a->UniqueId, b->UniqueId, 16) != 0)
-	{
-		return false;
-	}
-
-	return true;
-}
-
 // Accept the password change
 UINT ChangePasswordAccept(CONNECTION *c, PACK *p)
 {
diff --git a/src/Cedar/Session.c b/src/Cedar/Session.c
index 5475485a..03fb4394 100644
--- a/src/Cedar/Session.c
+++ b/src/Cedar/Session.c
@@ -1849,23 +1849,6 @@ SKIP:
 	}
 }
 
-// Name comparison of sessions
-int CompareSession(void *p1, void *p2)
-{
-	SESSION *s1, *s2;
-	if (p1 == NULL || p2 == NULL)
-	{
-		return 0;
-	}
-	s1 = *(SESSION **)p1;
-	s2 = *(SESSION **)p2;
-	if (s1 == NULL || s2 == NULL)
-	{
-		return 0;
-	}
-	return StrCmpi(s1->Name, s2->Name);
-}
-
 // Create an RPC session
 SESSION *NewRpcSession(CEDAR *cedar, CLIENT_OPTION *option)
 {
diff --git a/src/Cedar/Session.h b/src/Cedar/Session.h
index 10b23281..f65c9850 100644
--- a/src/Cedar/Session.h
+++ b/src/Cedar/Session.h
@@ -413,7 +413,6 @@ void StopSession(SESSION *s);
 void StopSessionEx(SESSION *s, bool no_wait);
 bool SessionConnect(SESSION *s);
 bool ClientConnect(CONNECTION *c);
-int CompareSession(void *p1, void *p2);
 PACKET_ADAPTER *NewPacketAdapter(PA_INIT *init, PA_GETCANCEL *getcancel, PA_GETNEXTPACKET *getnext,
 								 PA_PUTPACKET *put, PA_FREE *free);
 void FreePacketAdapter(PACKET_ADAPTER *pa);
@@ -435,7 +434,6 @@ LIST *NewCancelList();
 void ReleaseCancelList(LIST *o);
 void AddCancelList(LIST *o, CANCEL *c);
 void CancelList(LIST *o);
-bool CompareNodeInfo(NODE_INFO *a, NODE_INFO *b);
 bool IsPriorityHighestPacketForQoS(void *data, UINT size);
 UINT GetNextDelayedPacketTickDiff(SESSION *s);
 
diff --git a/src/Cedar/WinUi.c b/src/Cedar/WinUi.c
index 0188331c..d6c8d757 100644
--- a/src/Cedar/WinUi.c
+++ b/src/Cedar/WinUi.c
@@ -9234,44 +9234,6 @@ void Check(HWND hWnd, UINT id, bool b)
 	}
 }
 
-// Confirm that the character size of the text-box is less than or equal to specified size
-bool CheckTextSize(HWND hWnd, UINT id, UINT size, bool unicode)
-{
-	// Validate arguments
-	if (hWnd == NULL)
-	{
-		return false;
-	}
-
-	if (GetTextSize(hWnd, id, unicode) <= size)
-	{
-		return true;
-	}
-	else
-	{
-		return false;
-	}
-}
-
-// Confirm that a length of the string in the text-box is less than or equal to the specified size
-bool CheckTextLen(HWND hWnd, UINT id, UINT len, bool unicode)
-{
-	// Validate arguments
-	if (hWnd == NULL)
-	{
-		return false;
-	}
-
-	if (GetTextLen(hWnd, id, unicode) <= len)
-	{
-		return true;
-	}
-	else
-	{
-		return false;
-	}
-}
-
 // Limit the number of characters that can be entered into the text-box
 void LimitText(HWND hWnd, UINT id, UINT count)
 {
diff --git a/src/Cedar/WinUi.h b/src/Cedar/WinUi.h
index 31e0cc8e..9c34f9e5 100644
--- a/src/Cedar/WinUi.h
+++ b/src/Cedar/WinUi.h
@@ -661,8 +661,6 @@ bool GetFontSize(HFONT hFont, UINT *x, UINT *y);
 void SetFont(HWND hWnd, UINT id, HFONT hFont);
 void SetFontEx(HWND hWnd, UINT id, HFONT hFont, bool no_adjust_font_size);
 void LimitText(HWND hWnd, UINT id, UINT count);
-bool CheckTextLen(HWND hWnd, UINT id, UINT len, bool unicode);
-bool CheckTextSize(HWND hWnd, UINT id, UINT size, bool unicode);
 void Check(HWND hWnd, UINT id, bool b);
 bool IsChecked(HWND hWnd, UINT id);
 void SetIcon(HWND hWnd, UINT id, UINT icon_id);
diff --git a/src/Mayaqua/Cfg.c b/src/Mayaqua/Cfg.c
index 73b62dcd..e313afa9 100644
--- a/src/Mayaqua/Cfg.c
+++ b/src/Mayaqua/Cfg.c
@@ -536,15 +536,6 @@ bool CfgSaveExW3(CFG_RW *rw, FOLDER *f, wchar_t *name, UINT *written_size, bool
 }
 
 // Read the settings from the file
-FOLDER *CfgRead(char *name)
-{
-	wchar_t *name_w = CopyStrToUni(name);
-	FOLDER *ret = CfgReadW(name_w);
-
-	Free(name_w);
-
-	return ret;
-}
 FOLDER *CfgReadW(wchar_t *name)
 {
 	wchar_t tmp[MAX_SIZE];
@@ -1425,17 +1416,6 @@ void CfgAddData(BUF *b, UINT type, char *name, char *data, char *sub, UINT depth
 	Free(tmp);
 }
 
-// Convert the data type string to an integer value
-UINT CfgStrToType(char *str)
-{
-	if (!StrCmpi(str, TAG_INT)) return ITEM_TYPE_INT;
-	if (!StrCmpi(str, TAG_INT64)) return ITEM_TYPE_INT64;
-	if (!StrCmpi(str, TAG_BYTE)) return ITEM_TYPE_BYTE;
-	if (!StrCmpi(str, TAG_STRING)) return ITEM_TYPE_STRING;
-	if (!StrCmpi(str, TAG_BOOL)) return ITEM_TYPE_BOOL;
-	return 0;
-}
-
 // Convert the type of data to a string
 char *CfgTypeToStr(UINT type)
 {
diff --git a/src/Mayaqua/Cfg.h b/src/Mayaqua/Cfg.h
index 2ffe4fb5..aa42ac51 100644
--- a/src/Mayaqua/Cfg.h
+++ b/src/Mayaqua/Cfg.h
@@ -226,7 +226,6 @@ void CfgAddLine(BUF *b, char *str, UINT depth);
 void CfgAddDeclare(BUF *b, char *name, UINT depth);
 void CfgAddEnd(BUF *b, UINT depth);
 void CfgAddData(BUF *b, UINT type, char *name, char *data, char *sub, UINT depth);
-UINT CfgStrToType(char *str);
 char *CfgTypeToStr(UINT type);
 void CfgAddItemText(BUF *b, ITEM *t, UINT depth);
 bool CfgEnumFolderProc(FOLDER *f, void *param);
@@ -242,7 +241,6 @@ bool CfgSaveEx(CFG_RW *rw, FOLDER *f, char *name);
 bool CfgSaveExW(CFG_RW *rw, FOLDER *f, wchar_t *name);
 bool CfgSaveExW2(CFG_RW *rw, FOLDER *f, wchar_t *name, UINT *written_size);
 bool CfgSaveExW3(CFG_RW *rw, FOLDER *f, wchar_t *name, UINT *written_size, bool write_binary);
-FOLDER *CfgRead(char *name);
 FOLDER *CfgReadW(wchar_t *name);
 FOLDER *CfgCreateRoot();
 void CfgTest();
diff --git a/src/Mayaqua/Encrypt.c b/src/Mayaqua/Encrypt.c
index 192f20c6..c049dfa9 100644
--- a/src/Mayaqua/Encrypt.c
+++ b/src/Mayaqua/Encrypt.c
@@ -2745,10 +2745,6 @@ bool RsaGen(K **priv, K **pub, UINT bit)
 }
 
 // Confirm whether the certificate X is signed by the issuer of the certificate x_issuer
-bool CheckX(X *x, X *x_issuer)
-{
-	return CheckXEx(x, x_issuer, false, false);
-}
 bool CheckXEx(X *x, X *x_issuer, bool check_name, bool check_date)
 {
 	K *k;
diff --git a/src/Mayaqua/Encrypt.h b/src/Mayaqua/Encrypt.h
index 512c7054..fbcff409 100644
--- a/src/Mayaqua/Encrypt.h
+++ b/src/Mayaqua/Encrypt.h
@@ -427,7 +427,6 @@ bool CompareName(NAME *n1, NAME *n2);
 K *GetKFromX(X *x);
 bool CheckSignature(X *x, K *k);
 X *X509ToX(X509 *x509);
-bool CheckX(X *x, X *x_issuer);
 bool CheckXEx(X *x, X *x_issuer, bool check_name, bool check_date);
 bool Asn1TimeToSystem(SYSTEMTIME *s, void *asn1_time);
 bool StrToSystem(SYSTEMTIME *s, char *str);
diff --git a/src/Mayaqua/FileIO.c b/src/Mayaqua/FileIO.c
index a610ffad..fd81f1e6 100644
--- a/src/Mayaqua/FileIO.c
+++ b/src/Mayaqua/FileIO.c
@@ -725,24 +725,6 @@ void ConvertSafeFileName(char *dst, UINT size, char *src)
 		}
 	}
 }
-void ConvertSafeFileNameW(wchar_t *dst, UINT size, wchar_t *src)
-{
-	UINT i;
-	// Validate arguments
-	if (dst == NULL || src == NULL)
-	{
-		return;
-	}
-
-	UniStrCpy(dst, size, src);
-	for (i = 0;i < UniStrLen(dst);i++)
-	{
-		if (UniIsSafeChar(dst[i]) == false)
-		{
-			dst[i] = L'_';
-		}
-	}
-}
 
 // Get the free disk space
 bool GetDiskFree(char *path, UINT64 *free_size, UINT64 *used_size, UINT64 *total_size)
diff --git a/src/Mayaqua/FileIO.h b/src/Mayaqua/FileIO.h
index 0822f2a9..2a500e88 100644
--- a/src/Mayaqua/FileIO.h
+++ b/src/Mayaqua/FileIO.h
@@ -370,7 +370,6 @@ int CompareDirListByName(void *p1, void *p2);
 bool GetDiskFree(char *path, UINT64 *free_size, UINT64 *used_size, UINT64 *total_size);
 bool GetDiskFreeW(wchar_t *path, UINT64 *free_size, UINT64 *used_size, UINT64 *total_size);
 void ConvertSafeFileName(char *dst, UINT size, char *src);
-void ConvertSafeFileNameW(wchar_t *dst, UINT size, wchar_t *src);
 bool FileReplaceRename(char *old_name, char *new_name);
 bool FileReplaceRenameW(wchar_t *old_name, wchar_t *new_name);
 bool IsFile(char *name);
diff --git a/src/Mayaqua/Memory.c b/src/Mayaqua/Memory.c
index 92b7efa5..5ccb38e3 100644
--- a/src/Mayaqua/Memory.c
+++ b/src/Mayaqua/Memory.c
@@ -2601,20 +2601,6 @@ void PadFifoFront(FIFO *f, UINT size)
 	f->p = ReAlloc(f->p, f->memsize);
 }
 
-// Clear the FIFO
-void ClearFifo(FIFO *f)
-{
-	// Validate arguments
-	if (f == NULL)
-	{
-		return;
-	}
-
-	f->size = f->pos = 0;
-	f->memsize = FIFO_INIT_MEM_SIZE;
-	f->p = ReAlloc(f->p, f->memsize);
-}
-
 // Get the current pointer of the FIFO
 UCHAR *GetFifoPointer(FIFO *f)
 {
@@ -4263,25 +4249,6 @@ void *AddHead(void *src, UINT src_size, void *head, UINT head_size)
 	return ret;
 }
 
-// Clone the memory area (only the tail)
-void *CloneTail(void *src, UINT src_size, UINT dst_size)
-{
-	// Validate arguments
-	if (src_size != 0 && src == NULL)
-	{
-		return NULL;
-	}
-
-	if (src_size >= dst_size)
-	{
-		return Clone(((UCHAR *)src) + (src_size - dst_size), dst_size);
-	}
-	else
-	{
-		return Clone(src, src_size);
-	}
-}
-
 // Clone the memory area
 void *Clone(void *addr, UINT size)
 {
diff --git a/src/Mayaqua/Memory.h b/src/Mayaqua/Memory.h
index 28babd8b..c41ef1ff 100644
--- a/src/Mayaqua/Memory.h
+++ b/src/Mayaqua/Memory.h
@@ -290,7 +290,6 @@ int CmpCaseIgnore(void *p1, void *p2, UINT size);
 void ZeroMem(void *addr, UINT size);
 void Zero(void *addr, UINT size);
 void *Clone(void *addr, UINT size);
-void *CloneTail(void *src, UINT src_size, UINT dst_size);
 void *AddHead(void *src, UINT src_size, void *head, UINT head_size);
 
 char B64_CodeToChar(BYTE c);
@@ -360,7 +359,6 @@ UCHAR *FifoPtr(FIFO *f);
 void WriteFifo(FIFO *f, void *p, UINT size);
 void WriteFifoFront(FIFO *f, void *p, UINT size);
 void PadFifoFront(FIFO *f, UINT size);
-void ClearFifo(FIFO *f);
 UINT FifoSize(FIFO *f);
 void LockFifo(FIFO *f);
 void UnlockFifo(FIFO *f);
diff --git a/src/Mayaqua/Network.c b/src/Mayaqua/Network.c
index 73166847..177bb263 100644
--- a/src/Mayaqua/Network.c
+++ b/src/Mayaqua/Network.c
@@ -6823,23 +6823,6 @@ bool IsNetworkPrefixAddress6(IP *ip, IP *subnet)
 	return false;
 }
 
-// Check whether the unicast address is available
-bool CheckUnicastAddress(IP *ip)
-{
-	// Validate arguments
-	if (ip == NULL)
-	{
-		return false;
-	}
-
-	if ((GetIPAddrType6(ip) & IPV6_ADDR_UNICAST) == 0)
-	{
-		return false;
-	}
-
-	return true;
-}
-
 // Get the host address
 void GetHostAddress6(IP *dst, IP *ip, IP *subnet)
 {
@@ -7778,17 +7761,6 @@ void CopyIP(IP *dst, IP *src)
 	Copy(dst, src, sizeof(IP));
 }
 
-// Check the length of the IPv6 subnet
-bool CheckSubnetLength6(UINT i)
-{
-	if (i >= 1 && i <= 127)
-	{
-		return true;
-	}
-
-	return false;
-}
-
 // Get the process ID of the corresponding TCP connection by the socket
 UINT GetTcpProcessIdFromSocket(SOCK *s)
 {
@@ -8167,24 +8139,6 @@ void PrintTcpTableList(LIST *o)
 	Print("------\n\n");
 }
 
-// Comparison of TCP table items
-int CompareTcpTable(void *p1, void *p2)
-{
-	TCPTABLE *t1, *t2;
-	if (p1 == NULL || p2 == NULL)
-	{
-		return 0;
-	}
-	t1 = *(TCPTABLE **)p1;
-	t2 = *(TCPTABLE **)p2;
-	if (t1 == NULL || t2 == NULL)
-	{
-		return 0;
-	}
-
-	return Cmp(t1, t2, sizeof(TCPTABLE));
-}
-
 // Get the TCP table list
 LIST *GetTcpTableList()
 {
@@ -14610,39 +14564,6 @@ typedef struct TCP_PORT_CHECK
 	bool ok;
 } TCP_PORT_CHECK;
 
-// The thread to check the TCP port
-void CheckTCPPortThread(THREAD *thread, void *param)
-{
-	TCP_PORT_CHECK *c;
-	SOCK *s;
-	// Validate arguments
-	if (thread == NULL || param == NULL)
-	{
-		return;
-	}
-
-	c = (TCP_PORT_CHECK *)param;
-	AddRef(c->ref);
-	NoticeThreadInit(thread);
-
-	AddWaitThread(thread);
-
-	s = Connect(c->hostname, c->port);
-	if (s != NULL)
-	{
-		c->ok = true;
-		Disconnect(s);
-		ReleaseSock(s);
-	}
-
-	if (Release(c->ref) == 0)
-	{
-		Free(c);
-	}
-
-	DelWaitThread(thread);
-}
-
 // Check whether the TCP port can be connected
 bool CheckTCPPortEx(char *hostname, UINT port, UINT timeout)
 {
diff --git a/src/Mayaqua/Network.h b/src/Mayaqua/Network.h
index 21b67ba7..a1018efc 100644
--- a/src/Mayaqua/Network.h
+++ b/src/Mayaqua/Network.h
@@ -1354,7 +1354,6 @@ void SetTimeout(SOCK *sock, UINT timeout);
 UINT GetTimeout(SOCK *sock);
 bool CheckTCPPort(char *hostname, UINT port);
 bool CheckTCPPortEx(char *hostname, UINT port, UINT timeout);
-void CheckTCPPortThread(THREAD *thread, void *param);
 ROUTE_TABLE *GetRouteTable();
 void FreeRouteTable(ROUTE_TABLE *t);
 bool AddRouteEntryEx(ROUTE_ENTRY *e, bool *already_exists);
@@ -1426,7 +1425,6 @@ UINT GetNumIpClient(IP *ip);
 void SetLinuxArpFilter();
 LIST *GetTcpTableList();
 void FreeTcpTableList(LIST *o);
-int CompareTcpTable(void *p1, void *p2);
 void PrintTcpTableList(LIST *o);
 TCPTABLE *GetTcpTableFromEndPoint(LIST *o, IP *local_ip, UINT local_port, IP *remote_ip, UINT remote_port);
 UINT GetTcpProcessIdFromSocket(SOCK *s);
@@ -1455,7 +1453,6 @@ SOCKET_TIMEOUT_PARAM *NewSocketTimeout(SOCK *sock);
 void FreeSocketTimeout(SOCKET_TIMEOUT_PARAM *ttp);
 
 void CopyIP(IP *dst, IP *src);
-bool CheckSubnetLength6(UINT i);
 bool IsIP6(IP *ip);
 bool IsIP4(IP *ip);
 bool IsSameIPVer(IP *ip1, IP *ip2);
@@ -1489,7 +1486,6 @@ UINT GetIPAddrType6(IP *ip);
 UINT GetIPv6AddrType(IPV6_ADDR *addr);
 void GenerateMulticastMacAddress6(UCHAR *mac, IP *ip);
 void GetSoliciationMulticastAddr6(IP *dst, IP *src);
-bool CheckUnicastAddress(IP *ip);
 bool IsNetworkPrefixAddress6(IP *ip, IP *subnet);
 bool IsNetworkAddress6(IP *ip, IP *subnet);
 void GetHostAddress6(IP *dst, IP *ip, IP *subnet);
diff --git a/src/Mayaqua/Secure.c b/src/Mayaqua/Secure.c
index ef43ad7a..e995a5fb 100644
--- a/src/Mayaqua/Secure.c
+++ b/src/Mayaqua/Secure.c
@@ -838,32 +838,6 @@ bool DeleteSecCert(SECURE *sec, char *name)
 	return DeleteSecObjectByName(sec, name, SEC_X);
 }
 
-// Convert the the CK_DATE to the 64 bit time
-UINT64 CkDateToUINT64(struct CK_DATE *ck_date)
-{
-	SYSTEMTIME st;
-	char year[32], month[32], day[32];
-	// Validate arguments
-	if (ck_date == NULL)
-	{
-		return 0;
-	}
-
-	Zero(year, sizeof(year));
-	Zero(month, sizeof(month));
-	Zero(day, sizeof(day));
-
-	Copy(year, ck_date->year, 4);
-	Copy(month, ck_date->month, 2);
-	Copy(day, ck_date->day, 2);
-
-	st.wYear = ToInt(year);
-	st.wMonth = ToInt(month);
-	st.wDay = ToInt(day);
-
-	return SystemToUINT64(&st);
-}
-
 // Convert the 64 bit time to the CK_DATE
 void UINT64ToCkDate(void *p_ck_date, UINT64 time64)
 {
diff --git a/src/Mayaqua/Str.c b/src/Mayaqua/Str.c
index 5d386755..f9fe2d41 100644
--- a/src/Mayaqua/Str.c
+++ b/src/Mayaqua/Str.c
@@ -2021,23 +2021,6 @@ char *CopyBinToStrEx(void *data, UINT data_size)
 
 	return ret;
 }
-char *CopyBinToStr(void *data, UINT data_size)
-{
-	char *ret;
-	UINT size;
-	// Validate arguments
-	if (data == NULL)
-	{
-		return NULL;
-	}
-
-	size = data_size * 2 + 1;
-	ret = ZeroMalloc(size);
-
-	BinToStr(ret, size, data, data_size);
-
-	return ret;
-}
 
 // Convert the binary data to a hexadecimal string
 void BinToStr(char *str, UINT str_size, void *data, UINT data_size)
diff --git a/src/Mayaqua/Str.h b/src/Mayaqua/Str.h
index 92da8dc8..ac0b33d0 100644
--- a/src/Mayaqua/Str.h
+++ b/src/Mayaqua/Str.h
@@ -207,7 +207,6 @@ bool IsEmptyStr(char *str);
 void BinToStrEx(char *str, UINT str_size, void *data, UINT data_size);
 void BinToStrEx2(char *str, UINT str_size, void *data, UINT data_size, char padding_char);
 char *CopyBinToStrEx(void *data, UINT data_size);
-char *CopyBinToStr(void *data, UINT data_size);
 BUF *StrToBin(char *str);
 void MacToStr(char *str, UINT size, UCHAR *mac_address);
 void ToStr3(char *str, UINT size, UINT64 v);
diff --git a/src/Mayaqua/Tracking.c b/src/Mayaqua/Tracking.c
index 1a1ccfd1..434d697e 100644
--- a/src/Mayaqua/Tracking.c
+++ b/src/Mayaqua/Tracking.c
@@ -589,33 +589,6 @@ void TrackChangeObjSize(UINT64 addr, UINT size, UINT64 new_addr)
 	UnlockTrackingList();
 }
 
-// Memory address comparison function
-int CompareTrackingObject(const void *p1, const void *p2)
-{
-	TRACKING_OBJECT *o1, *o2;
-	// Validate arguments
-	if (p1 == NULL || p2 == NULL)
-	{
-		return 0;
-	}
-	o1 = *(TRACKING_OBJECT **)p1;
-	o2 = *(TRACKING_OBJECT **)p2;
-	if (o1 == NULL || o2 == NULL)
-	{
-		return 0;
-	}
-
-	if (o1->Address > o2->Address)
-	{
-		return 1;
-	}
-	if (o1->Address == o2->Address)
-	{
-		return 0;
-	}
-	return -1;
-}
-
 // Search an object in the tracking list
 TRACKING_OBJECT *SearchTrackingList(UINT64 Address)
 {
diff --git a/src/Mayaqua/Tracking.h b/src/Mayaqua/Tracking.h
index 8706c9fe..882414b9 100644
--- a/src/Mayaqua/Tracking.h
+++ b/src/Mayaqua/Tracking.h
@@ -166,7 +166,6 @@ void GetCallStackStr(char *str, UINT size, CALLSTACK_DATA *s);
 void PrintCallStack(CALLSTACK_DATA *s);
 void InitTracking();
 void FreeTracking();
-int CompareTrackingObject(const void *p1, const void *p2);
 void LockTrackingList();
 void UnlockTrackingList();
 void InsertTrackingList(TRACKING_OBJECT *o);