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diff --git a/nping/ProbeMode.h b/nping/ProbeMode.h
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+
+/***************************************************************************
+ * ProbeMode.h -- Probe Mode is nping's default working mode. Basically,   *
+ * it involves sending the packets that the user requested at regular      *
+ * intervals and capturing responses from the wire.                        *
+ *                                                                         *
+ ***********************IMPORTANT NMAP LICENSE TERMS************************
+ *
+ * The Nmap Security Scanner is (C) 1996-2023 Nmap Software LLC ("The Nmap
+ * Project"). Nmap is also a registered trademark of the Nmap Project.
+ *
+ * This program is distributed under the terms of the Nmap Public Source
+ * License (NPSL). The exact license text applying to a particular Nmap
+ * release or source code control revision is contained in the LICENSE
+ * file distributed with that version of Nmap or source code control
+ * revision. More Nmap copyright/legal information is available from
+ * https://nmap.org/book/man-legal.html, and further information on the
+ * NPSL license itself can be found at https://nmap.org/npsl/ . This
+ * header summarizes some key points from the Nmap license, but is no
+ * substitute for the actual license text.
+ *
+ * Nmap is generally free for end users to download and use themselves,
+ * including commercial use. It is available from https://nmap.org.
+ *
+ * The Nmap license generally prohibits companies from using and
+ * redistributing Nmap in commercial products, but we sell a special Nmap
+ * OEM Edition with a more permissive license and special features for
+ * this purpose. See https://nmap.org/oem/
+ *
+ * If you have received a written Nmap license agreement or contract
+ * stating terms other than these (such as an Nmap OEM license), you may
+ * choose to use and redistribute Nmap under those terms instead.
+ *
+ * The official Nmap Windows builds include the Npcap software
+ * (https://npcap.com) for packet capture and transmission. It is under
+ * separate license terms which forbid redistribution without special
+ * permission. So the official Nmap Windows builds may not be redistributed
+ * without special permission (such as an Nmap OEM license).
+ *
+ * Source is provided to this software because we believe users have a
+ * right to know exactly what a program is going to do before they run it.
+ * This also allows you to audit the software for security holes.
+ *
+ * Source code also allows you to port Nmap to new platforms, fix bugs, and add
+ * new features. You are highly encouraged to submit your changes as a Github PR
+ * or by email to the dev@nmap.org mailing list for possible incorporation into
+ * the main distribution. Unless you specify otherwise, it is understood that
+ * you are offering us very broad rights to use your submissions as described in
+ * the Nmap Public Source License Contributor Agreement. This is important
+ * because we fund the project by selling licenses with various terms, and also
+ * because the inability to relicense code has caused devastating problems for
+ * other Free Software projects (such as KDE and NASM).
+ *
+ * The free version of Nmap 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. Warranties,
+ * indemnification and commercial support are all available through the
+ * Npcap OEM program--see https://nmap.org/oem/
+ *
+ ***************************************************************************/
+#ifndef __PROBEMODE_H__
+#define __PROBEMODE_H__ 1
+
+
+
+#include "nping.h"
+#include "nsock.h"
+#include "NpingTarget.h"
+#include "utils_net.h"
+#include "utils.h"
+
+#define PKT_TYPE_TCP_CONNECT  1
+#define PKT_TYPE_UDP_NORMAL   2
+#define PKT_TYPE_TCP_RAW      3
+#define PKT_TYPE_UDP_RAW      4
+#define PKT_TYPE_ICMP_RAW     5
+#define PKT_TYPE_ARP_RAW      6
+
+/* The sendpkt structure is the data normalProbeMode() function passes to
+ * the nsock event handler. It contains the necessary information so a
+ * handler can send one probe. */
+typedef struct sendpkt{
+    int type;
+    u8 *pkt;
+    int pktLen;
+    int rawfd;
+    u32 seq;
+    NpingTarget *target;
+    u16 dstport;
+}sendpkt_t;
+
+
+class ProbeMode  {
+
+    private:
+
+        nsock_pool nsp;        /**< Internal Nsock pool                       */
+        bool nsock_init;       /**< True if nsock pool has been initialized   */
+
+    public:
+
+        ProbeMode();
+        ~ProbeMode();
+        void reset();
+        int init_nsock();
+        int start();
+        int cleanup();
+        nsock_pool getNsockPool();
+
+        static int createIPv4(IPv4Header *i, PacketElement *next_element, const char *next_proto, NpingTarget *target);
+        static int createIPv6(IPv6Header *i, PacketElement *next_element, const char *next_proto, NpingTarget *target);
+        static int doIPv6ThroughSocket(int rawfd);
+        static int fillPacket(NpingTarget *target, u16 port, u8 *buff, int bufflen, int *filledlen, int rawfd);
+        static int fillPacketTCP(NpingTarget *target, u16 port, u8 *buff, int bufflen, int *filledlen, int rawfd);
+        static int fillPacketUDP(NpingTarget *target, u16 port, u8 *buff, int bufflen, int *filledlen, int rawfd);
+        static int fillPacketICMP(NpingTarget *target, u8 *buff, int bufflen, int *filledlen, int rawfd);
+        static int fillPacketARP(NpingTarget *target, u8 *buff, int bufflen, int *filledlen, int rawfd);
+        static char *getBPFFilterString();
+        static void probe_nping_event_handler(nsock_pool nsp, nsock_event nse, void *arg);
+        static void probe_delayed_output_handler(nsock_pool nsp, nsock_event nse, void *mydata);
+        static void probe_tcpconnect_event_handler(nsock_pool nsp, nsock_event nse, void *arg);
+        static void probe_udpunpriv_event_handler(nsock_pool nsp, nsock_event nse, void *arg);
+
+}; /* End of class ProbeMode */
+
+
+/* Handler wrappers */
+void nping_event_handler(nsock_pool nsp, nsock_event nse, void *arg);
+void tcpconnect_event_handler(nsock_pool nsp, nsock_event nse, void *arg);
+void udpunpriv_event_handler(nsock_pool nsp, nsock_event nse, void *arg);
+void delayed_output_handler(nsock_pool nsp, nsock_event nse, void *arg);
+
+#endif /* __PROBEMODE_H__ */