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datalink.h

/*** This Programs/Libraries are (C)opyright by Sebastian Krahmer.
 *** You may use it under the terms of the GPL. You should have
 *** already received the file COPYING that shows you your rights.
 *** Please look at COPYING for further license-details.
 ***  
 *** THERE IS ABSOLUTELY NO WARRANTY. SO YOU USE IT AT YOUR OWN RISK.
 *** IT WAS WRITTEN IN THE HOPE THAT IT WILL BE USEFULL. I AM NOT RESPONSIBLE
 *** FOR ANY DAMAGE YOU MAYBE GET DUE TO USING MY PROGRAMS.
 ***/
#ifndef _DATALINK_H_ 
#define _DATALINK_H_

#include "usi-structs.h"
#include "RX.h"
#include <stdio.h>

//#include "config.h"

namespace usipp {

class Pcap : public RX {
private:
        struct timeval d_tv;
        
        // Heavily used by libpcap
        int d_datalink;
        size_t d_framelen, d_snaplen;

        // pcap-descriptor
        pcap_t *d_pd;

        // netaddress and netmask
        bpf_u_int32 d_localnet, d_netmask;
       
        // The actual filter-program 
        struct bpf_program d_filter;

        // The pcap-header for every packet fetched
        struct pcap_pkthdr d_phdr;

        // filled by init_device()
        char d_dev[10];
        int d_has_promisc;

        // true when timed out
        bool d_timeout; 

protected:
        struct ether_header d_ether;
        char d_filter_string[1000];

public:

        Pcap(char *);
        
        Pcap();
        
        Pcap(const Pcap &);
        
        virtual ~Pcap();

        Pcap &operator=(const Pcap &);
        

        char *get_hwsrc(char *, size_t);

        char *get_hwdst(char *, size_t);

        u_int16_t get_etype();

        int get_datalink();

        int get_framelen();
    
        virtual int init_device(char *dev, int promisc, size_t snaplen);

        virtual int setfilter(char *filter);

        virtual int sniffpack(void *, size_t);

        void *get_frame(void *, size_t);

        pcap_t *pcap() { return d_pd; }

        int timeout(struct timeval);

        bool timeout();
        
}; // class Datalink {}


} // namespace usipp

#endif // _DATALINK_H_

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