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diff --git a/src/tlv.h b/src/tlv.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_H_
+#define _GMRF_PROTO_BABEL_TLV_H_
+
+#include "types.h"
+
+
+typedef enum gp_babel_tlv_type {
+	TLV_PAD1 = 0,
+	TLV_PADN,
+	TLV_ACK_REQ,
+	TLV_ACK,
+	TLV_HELLO,
+	TLV_IHU,
+	TLV_NODE_ID,
+	TLV_RESERVED,
+	TLV_UPDATE,
+	TLV_ANNOUNCE_REQ,
+	TLV_SEQNO_REQ,
+} gp_babel_tlv_type_t;
+
+typedef enum gp_babel_addr_enc {
+	ADDR_ENC_UNSPEC = 0,
+	ADDR_ENC_IPV4,
+	ADDR_ENC_IPV6,
+	ADDR_ENC_IPV6LL,
+	ADDR_ENC_GMRF,
+} gp_babel_addr_enc_t;
+
+
+typedef void (*gp_babel_tlv_cb)(gp_babel_tlv_type_t type, const void *data, size_t len, void *arg);
+
+
+bool gp_babel_tlv_parse(const gp_babel_packet_t *packet, gp_babel_tlv_cb cb, void *arg);
+void* gp_babel_tlv_add(gp_babel_packet_t *packet, size_t max_len, gp_babel_tlv_type_t type, size_t len);
+
+
+#endif /* _GMRF_PROTO_BABEL_TLV_H_ */