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diff --git a/wiretap/pcapng_module.h b/wiretap/pcapng_module.h
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+/* pcap_module.h
+ *
+ * Wiretap Library
+ * Copyright (c) 1998 by Gilbert Ramirez <gram@alumni.rice.edu>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef __PCAP_MODULE_H__
+#define __PCAP_MODULE_H__
+
+/*
+ * Reader and writer routines for pcap-ng block types.
+ */
+typedef gboolean (*block_reader)(FILE_T, int, gboolean, struct wtap_pkthdr *,
+ Buffer *, int *, gchar **);
+typedef gboolean (*block_writer)(wtap_dumper *, const struct wtap_pkthdr *,
+ const guint8 *, int *);
+
+/*
+ * Register a handler for a pcap-ng block type.
+ */
+WS_DLL_PUBLIC
+void register_pcapng_block_type_handler(guint block_type, block_reader read,
+ block_writer write);
+
+#endif /* __PCAP_MODULE_H__ */
+