
/***************************************************************************
 * 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************************
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 ***************************************************************************/
#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__ */
