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diff --git a/lwip/src/include/netif/zepif.h b/lwip/src/include/netif/zepif.h
new file mode 100644
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+++ b/lwip/src/include/netif/zepif.h
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+/**
+ * @file
+ *
+ * A netif implementing the ZigBee Eencapsulation Protocol (ZEP).
+ * This is used to tunnel 6LowPAN over UDP.
+ */
+
+/*
+ * Copyright (c) 2018 Simon Goldschmidt
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. 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.
+ * 3. 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.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Simon Goldschmidt <goldsimon@gmx.de>
+ *
+ */
+
+#ifndef LWIP_HDR_ZEPIF_H
+#define LWIP_HDR_ZEPIF_H
+
+#include "lwip/opt.h"
+#include "netif/lowpan6.h"
+
+#if LWIP_IPV6 && LWIP_UDP /* don't build if not configured for use in lwipopts.h */
+
+#include "lwip/netif.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define ZEPIF_DEFAULT_UDP_PORT  17754
+
+/** Pass this struct as 'state' to netif_add to control the behaviour
+ * of this netif. If NULL is passed, default behaviour is chosen */
+struct zepif_init {
+  /** The UDP port used to ZEP frames from (0 = default) */
+  u16_t               zep_src_udp_port;
+  /** The UDP port used to ZEP frames to (0 = default) */
+  u16_t               zep_dst_udp_port;
+  /** The IP address to sed ZEP frames from (NULL = ANY) */
+  const ip_addr_t    *zep_src_ip_addr;
+  /** The IP address to sed ZEP frames to (NULL = BROADCAST) */
+  const ip_addr_t    *zep_dst_ip_addr;
+  /** If != NULL, the udp pcb is bound to this netif */
+  const struct netif *zep_netif;
+  /** MAC address of the 6LowPAN device */
+  u8_t                addr[6];
+};
+
+err_t zepif_init(struct netif *netif);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LWIP_IPV6 && LWIP_UDP */
+
+#endif /* LWIP_HDR_ZEPIF_H */