diff --git a/qse/include/qse/net/Makefile.am b/qse/include/qse/net/Makefile.am
index c8431816..48630e4b 100644
--- a/qse/include/qse/net/Makefile.am
+++ b/qse/include/qse/net/Makefile.am
@@ -1,4 +1,4 @@
 pkgincludedir= $(includedir)/qse/net
-pkginclude_HEADERS = http.h htre.h htrd.h httpd.h
+pkginclude_HEADERS = http.h htre.h htrd.h httpd.h upxd.h
 
 
diff --git a/qse/include/qse/net/httpd.h b/qse/include/qse/net/httpd.h
index fc06819e..aaad49ac 100644
--- a/qse/include/qse/net/httpd.h
+++ b/qse/include/qse/net/httpd.h
@@ -1,5 +1,5 @@
 /*
- * $Id: htrd.h 223 2008-06-26 06:44:41Z baconevi $
+ * $Id$
  *
     Copyright 2006-2011 Chung, Hyung-Hwan.
     This file is part of QSE.
diff --git a/qse/include/qse/net/upxd.h b/qse/include/qse/net/upxd.h
new file mode 100644
index 00000000..2a340589
--- /dev/null
+++ b/qse/include/qse/net/upxd.h
@@ -0,0 +1,89 @@
+/*
+ * $Id$
+ *
+    Copyright 2006-2011 Chung, Hyung-Hwan.
+    This file is part of QSE.
+
+    QSE is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Lesser General Public License as 
+    published by the Free Software Foundation, either version 3 of 
+    the License, or (at your option) any later version.
+
+    QSE is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public 
+    License along with QSE. If not, see <htrd://www.gnu.org/licenses/>.
+ */
+
+#ifndef _QSE_NET_UPXD_H_
+#define _QSE_NET_UPXD_H_
+
+#include <qse/types.h>
+#include <qse/macros.h>
+
+typedef struct qse_upxd_t qse_upxd_t;
+typedef struct qse_upxd_client_t qse_upxd_client_t;
+typedef struct qse_upxd_server_t qse_upxd_server_t;
+
+enum qse_upxd_errnum_t
+{
+	QSE_UPXD_ENOERR,
+     QSE_UPXD_ENOMEM,
+     QSE_UPXD_EINVAL,
+     QSE_UPXD_EACCES,
+     QSE_UPXD_ENOENT,
+     QSE_UPXD_EEXIST,
+     QSE_UPXD_EINTR,
+     QSE_UPXD_EAGAIN,
+
+	QSE_UPXD_ENOIMPL,
+	QSE_UPXD_EOTHER
+};
+typedef qse_upxd_errnum_t qse_upxd_errnum_t;
+
+struct qse_upxd_server_t
+{
+	qse_upxd_server_t*  next;
+	/* ------------------------------ */
+	qse_nwad_t          nwad;
+	qse_ubi_t           handle;
+};
+
+struct qse_upxd_client_t
+{
+	qse_nwad_t remote_addr;
+	qse_nwad_t local_addr;
+};
+
+struct qse_upxd_cbs_t
+{
+	struct
+	{
+		int (*open) (qse_upxd_t* upxd, qse_upxd_server_t* server);
+		void (*close) (qse_upxd_t* upxd, qse_upxd_server_t* server);
+
+		qse_ssize_t (*recv) (
+			qse_upxd_t* upxd,
+			qse_upxd_client_t* client,
+			qse_mchar_t* buf, qse_size_t bufsize);
+
+		qse_ssize_t (*send) (
+			qse_upxd_t* upxd,
+			qse_upxd_client_t* client,
+			const qse_mchar_t* buf, qse_size_t bufsize);
+	} server;
+};
+
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
diff --git a/qse/lib/net/Makefile.am b/qse/lib/net/Makefile.am
index 34fdce10..2cf4d0da 100644
--- a/qse/lib/net/Makefile.am
+++ b/qse/lib/net/Makefile.am
@@ -15,7 +15,8 @@ libqsenet_la_SOURCES = \
 	httpd-cgi.c \
 	httpd-proxy.c \
 	httpd-resol.c \
-	httpd-task.c
+	httpd-task.c \
+	upxd.c
 
 libqsenet_la_LDFLAGS = -version-info 1:0:0 -no-undefined -L../cmn -L$(libdir)
 libqsenet_la_LIBADD = -lqsecmn
diff --git a/qse/lib/net/upxd.c b/qse/lib/net/upxd.c
new file mode 100644
index 00000000..53bf44b3
--- /dev/null
+++ b/qse/lib/net/upxd.c
@@ -0,0 +1,109 @@
+/*
+ * $Id$
+ *
+    Copyright 2006-2011 Chung, Hyung-Hwan.
+    This file is part of QSE.
+
+    QSE is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Lesser General Public License as 
+    published by the Free Software Foundation, either version 3 of 
+    the License, or (at your option) any later version.
+
+    QSE is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public 
+    License along with QSE. If not, see <htrd://www.gnu.org/licenses/>.
+ */
+
+#include "upxd.h"
+
+qse_upxd_t* qse_upxd_open (qse_mmgr_t* mmgr, qse_size_t xtnsize)
+{
+	qse_upxd_t* upxd;
+
+	upxd = (qse_upxd_t*) QSE_MMGR_ALLOC (
+		mmgr, QSE_SIZEOF(*upxd) + xtnsize
+	);
+	if (upxd == QSE_NULL) return QSE_NULL;
+
+	if (qse_upxd_init (upxd, mmgr) <= -1)
+	{
+		QSE_MMGR_FREE (upxd->mmgr, upxd);
+		return QSE_NULL;
+	}
+
+	return upxd;
+}
+
+void qse_upxd_close (qse_upxd_t* upxd)
+{
+	qse_upxd_fini (upxd);
+	QSE_MMGR_FREE (upxd->mmgr, upxd);
+}
+
+int qse_upxd_init (qse_upxd_t* upxd, qse_mmgr_t* mmgr)
+{
+	QSE_MEMSET (upxd, 0, QSE_SIZEOF(*upxd));
+	upxd->mmgr = mmgr;
+	return 0;
+}
+
+void qse_upxd_fini (qse_upxd_t* upxd)
+{
+	free_server_list (upxd, upxd->server.list);
+	QSE_ASSERT (upxd->server.navail == 0);
+	upxd->server.list = QSE_NULL;
+}
+
+void qse_upxd_stop (qse_upxd_t* upxd)
+{
+	upxd->stopreq = 1;
+}
+ 
+qse_upxd_errnum_t qse_upxd_geterrnum (qse_upxd_t* upxd)
+{
+	return upxd->errnum;
+}
+
+void qse_upxd_seterrnum (qse_upxd_t* upxd, qse_upxd_errnum_t errnum)
+{
+	upxd->errnum = errnum;
+}
+
+int qse_upxd_addserver (qse_upxd_t* upxd, const qse_nwad_t* nwad)
+{
+	qse_upxd_server_t* server;
+
+	server = QSE_MMGR_ALLOC (upxd->mmgr, QSE_SIZEOF(*server));
+	if (server == QSE_NULL)
+	{
+		upxd->errnum = QSE_UPXD_ENOMEM;
+		return -1;
+	}
+
+	QSE_MEMSET (server, 0, QSE_SIZEOF(*server));
+	server->nwad = *nwad;
+
+	if (upxd->cbs->server.open (upxd, server) <= -1)
+	{
+		QSE_MMGR_FREE (upxd->mmgr, server);
+		return -1;
+	}
+
+	server->next = upxd->server.list;	
+	upxd->server.list = server;
+}
+
+int qse_upxd_loop (qse_upxd_t* upxd, qse_upxd_cbls_t* cbs)
+{
+	upxd->stopreq = 0;
+
+	while (!upxd->stopreq)
+	{
+	}
+
+	return 0;
+}
diff --git a/qse/lib/net/upxd.h b/qse/lib/net/upxd.h
new file mode 100644
index 00000000..ce4e393b
--- /dev/null
+++ b/qse/lib/net/upxd.h
@@ -0,0 +1,36 @@
+/*
+ * $Id$
+ *
+    Copyright 2006-2011 Chung, Hyung-Hwan.
+    This file is part of QSE.
+
+    QSE is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Lesser General Public License as 
+    published by the Free Software Foundation, either version 3 of 
+    the License, or (at your option) any later version.
+
+    QSE is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public 
+    License along with QSE. If not, see <htrd://www.gnu.org/licenses/>.
+ */
+
+#ifndef _QSE_LIB_NET_UPXD_H_
+#define _QSE_LIB_NET_UPXD_H_
+
+#include <qse/net/upxd.h>
+
+struct qse_upxd_t
+{
+	int stopreq;
+
+	struct
+	{
+		qse_upxd_server_t* list;
+	} server;
+};
+
+#endif