int BPFCapOpen(BPF_DATA * bd);
int BPFCapClose();
int BPFCapRead(char * buffer, int blen, char ** iface);
int BPFCapRead(char * buffer, int blen, char ** iface, BPF_DATA * bd);
int BPFCapOpen(BPF_DATA * bd);
int BPFCapClose();
int BPFCapRead(char * buffer, int blen, char ** iface);
int BPFCapRead(char * buffer, int blen, char ** iface, BPF_DATA * bd);