Index: uspace/lib/packet/include/netdb.h
===================================================================
--- uspace/lib/packet/include/netdb.h	(revision 1d0d06ab3697bcf26d50afc7b5b9c7c80b9e0abc)
+++ uspace/lib/packet/include/netdb.h	(revision 1d0d06ab3697bcf26d50afc7b5b9c7c80b9e0abc)
@@ -0,0 +1,109 @@
+/*
+ * Copyright (c) 2009 Lukas Mejdrech
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup netdb
+ *  @{
+ */
+
+/** @file
+ *  Structures and interfaces according to the BSD netdb.h file.
+ */
+
+#ifndef __NET_NETDB_H__
+#define __NET_NETDB_H__
+
+#include <sys/types.h>
+
+/** Structure returned by network data base library.
+ *  All addresses are supplied in host order, and returned in network order (suitable for use in system calls).
+ */
+struct	hostent {
+	/** Official host name.
+	 */
+	char * h_name;
+	/** Alias list.
+	 */
+	char **	h_aliases;
+	/** Host address type.
+	 */
+	int h_addrtype;
+	/** Address length.
+	 */
+	int h_length;
+	/** List of addresses from name server.
+	 */
+	char **	h_addr_list;
+	/** Address, for backward compatiblity.
+	 */
+#define	h_addr	h_addr_list[0]
+};
+
+/** @name Host entry address types definitions.
+ */
+/*@{*/
+
+/** Authoritative Answer Host not found address type.
+ */
+#define	HOST_NOT_FOUND	1
+
+/** Non-Authoritive Host not found, or SERVERFAIL address type.
+ */
+#define	TRY_AGAIN	2
+
+/** Non recoverable errors, FORMERR, REFUSED, NOTIMP address type.
+ */
+#define	NO_RECOVERY	3
+
+/** Valid name, no data record of requested type address type.
+ */
+#define	NO_DATA		4
+
+/** No address, look for MX record address type.
+ */
+#define	NO_ADDRESS	NO_DATA
+
+/*@}*/
+
+/** Returns host entry by the host address.
+ *  @param[in] address The host address.
+ *  @param[in] len The address length.
+ *  @param[in] type The address type.
+ *  @returns Host entry information.
+ */
+//struct hostent *	gethostbyaddr(const void * address, int len, int type);
+
+/** Returns host entry by the host name.
+ *  @param[in] name The host name.
+ *  @returns Host entry information.
+ */
+//struct hostent *	gethostbyname(const char * name);
+
+#endif
+
+/** @}
+ */
Index: uspace/lib/packet/include/tcp_codes.h
===================================================================
--- uspace/lib/packet/include/tcp_codes.h	(revision 1d0d06ab3697bcf26d50afc7b5b9c7c80b9e0abc)
+++ uspace/lib/packet/include/tcp_codes.h	(revision 1d0d06ab3697bcf26d50afc7b5b9c7c80b9e0abc)
@@ -0,0 +1,88 @@
+/*
+ * Copyright (c) 2009 Lukas Mejdrech
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup tcp
+ *  @{
+ */
+
+/** @file
+ *  TCP options definitions.
+ */
+
+#ifndef __NET_TCP_CODES_H__
+#define __NET_TCP_CODES_H__
+
+/** End of list TCP option.
+ */
+#define TCPOPT_END_OF_LIST				0x0
+
+/** No operation TCP option.
+ */
+#define TCPOPT_NO_OPERATION				0x1
+
+/** Maximum segment size TCP option.
+ */
+#define TCPOPT_MAX_SEGMENT_SIZE			0x2
+
+/** Maximum segment size TCP option length.
+ */
+#define TCPOPT_MAX_SEGMENT_SIZE_LENGTH	4
+
+/** Window scale TCP option.
+ */
+#define TCPOPT_WINDOW_SCALE				0x3
+
+/** Window scale TCP option length.
+ */
+#define TCPOPT_WINDOW_SCALE_LENGTH		3
+
+/** Selective acknowledgement permitted TCP option.
+ */
+#define TCPOPT_SACK_PERMITTED			0x4
+
+/** Selective acknowledgement permitted TCP option length.
+ */
+#define TCPOPT_SACK_PERMITTED_LENGTH	2
+
+/** Selective acknowledgement TCP option.
+ *  Has variable length.
+ */
+#define TCPOPT_SACK						0x5
+
+/** Timestamp TCP option.
+ */
+#define TCPOPT_TIMESTAMP				0x8
+
+/** Timestamp TCP option length.
+ */
+#define TCPOPT_TIMESTAMP_LENGTH			10
+
+#endif
+
+/** @}
+ */