Index: uspace/lib/pcap/include/pcap_dumper.h
===================================================================
--- uspace/lib/pcap/include/pcap_dumper.h	(revision 3a4c6d93a7348ed56f730d1686fe37062c67f586)
+++ uspace/lib/pcap/include/pcap_dumper.h	(revision 3a4c6d93a7348ed56f730d1686fe37062c67f586)
@@ -0,0 +1,60 @@
+/*
+ * Copyright (c) 2023 Nataliia Korop
+ * 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 libpcap
+ * @{
+ */
+/** @file Pcap dumper. Structure is a part of every device that is in category PCAP and can dump packets.
+ */
+
+#ifndef PCAP_IFACE_H_
+#define PCAP_IFACE_H_
+
+#include <errno.h>
+#include <fibril_synch.h>
+#include "pcap.h"
+
+/** Packet dumper structure that is responsible for dumping packets. */
+typedef struct pcap_dumper {
+	fibril_mutex_t mutex;
+	/** Flag that indicates, whether the packet should be dumped or ignored. */
+	bool to_dump;
+	/** Writer structure that is responsible for writing data to the destination buffer. */
+	pcap_writer_t writer;
+} pcap_dumper_t;
+
+extern errno_t pcap_dumper_start(pcap_dumper_t *, const char *);
+extern void pcap_dumper_stop(pcap_dumper_t *);
+extern int pcap_dumper_get_ops_number(void);
+extern errno_t pcap_dumper_set_ops(pcap_dumper_t *, int);
+extern void pcap_dumper_add_packet(pcap_dumper_t *, const void *data, size_t size);
+
+#endif
+
+/** @}
+ */