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diff --git a/src/tlv_types.h b/src/tlv_types.h
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+++ b/src/tlv_types.h
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+/*
+  Copyright (c) 2013, Matthias Schiffer <mschiffer@universe-factory.net>
+  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.
+
+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 COPYRIGHT HOLDER OR CONTRIBUTORS 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.
+*/
+
+
+#ifndef _GMRF_PROTO_BABEL_TLV_TYPES_H_
+#define _GMRF_PROTO_BABEL_TLV_TYPES_H_
+
+#include "tlv.h"
+
+
+typedef struct __attribute__((packed)) gp_babel_tlv_ack_req {
+	uint16_t reserved;
+	uint16_t nonce;
+	uint16_t interval;
+} gp_babel_tlv_ack_req_t;
+
+typedef struct __attribute__((packed)) gp_babel_tlv_ack {
+	uint16_t nonce;
+} gp_babel_tlv_ack_t;
+
+typedef struct __attribute__((packed)) gp_babel_tlv_hello {
+	uint16_t reserved;
+	uint16_t seqno;
+	uint16_t interval;
+} gp_babel_tlv_hello_t;
+
+typedef struct __attribute__((packed)) gp_babel_tlv_ihu {
+	uint8_t ae;
+	uint8_t reserved;
+	uint16_t rxcost;
+	uint16_t interval;
+	uint8_t address[];
+} gp_babel_tlv_ihu_t;
+
+typedef struct __attribute__((packed)) gp_babel_tlv_node_id {
+	gp_babel_node_id_t id;
+} gp_babel_tlv_node_id_t;
+
+typedef struct __attribute__((packed)) gp_babel_tlv_update {
+	uint8_t flags;
+	uint8_t reserved;
+	uint16_t interval;
+	uint16_t seqno;
+	uint16_t metric;
+	uint16_t type;
+	uint16_t key;
+	uint8_t data[];
+} gp_babel_tlv_update_t;
+
+typedef struct __attribute__((packed)) gp_babel_tlv_announce_req {
+	uint8_t flags;
+	uint8_t reserved;
+	gp_babel_node_id_t node;
+	uint16_t type;
+	uint16_t key;
+} gp_babel_tlv_announce_req_t;
+
+typedef struct __attribute__((packed)) gp_babel_tlv_seqno_req {
+	uint16_t seqno;
+	gp_babel_node_id_t node;
+	uint16_t type;
+	uint16_t key;
+} gp_babel_tlv_seqno_req_t;
+
+#endif /* _GMRF_PROTO_BABEL_TLV_TYPES_H_ */