httpflow/data_link.cpp at main · forest-code42/httpflow · GitHub

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#include"data_link.h"
#include<cstring>
#include<pcap.h>

intdatalink2off(int dl_id)
{
int dl_size = 0;
switch(dl_id) {

#ifdef DLT_NULL /* not tested */
caseDLT_NULL:
 dl_size = 4;
break;
#endif
#ifdef DLT_EN10MB
caseDLT_EN10MB:
 dl_size = 14;
break;
#endif
#ifdef DLT_RAW
caseDLT_RAW:
 dl_size = 0;
break;
#endif
#ifdef DLT_IEEE802_11 /* not tested */
caseDLT_IEEE802_11:
 dl_size = 24;
break;
#endif
#ifdef DLT_LOOP /* not tested */
caseDLT_LOOP:
 dl_size = 4;
break;
#endif
#ifdef DLT_PPP_ETHER
caseDLT_PPP_ETHER:
 dl_size = 8;
break;
#endif
#ifdef DLT_LINUX_SLL
caseDLT_LINUX_SLL:
 dl_size = 16;
break;
#endif
#ifdef DLT_PFLOG
caseDLT_PFLOG:
 dl_size = 48;
break;
#endif

/* credits for DLT_PPP, DLT_SLIP, DLT_SLIP_BSDOS
 and DLT_PPP_BSDOS offsets:
 SNiFf v0.3 by uLiX
 http://www.s0ftpj.org/bfi/online/bfi10/BFi10-05.html
*/
#ifdef DLT_PPP
caseDLT_PPP:
 dl_size = 4;
break;
#endif
#ifdef DLT_SLIP
caseDLT_SLIP:
 dl_size = 16;
break;
#endif
#ifdef DLT_SLIP_BSDOS
caseDLT_SLIP_BSDOS:
 dl_size = 24;
break;
#endif
#ifdef DLT_PPP_BSDOS
caseDLT_PPP_BSDOS:
 dl_size = 24;
break;
#endif

default:
break;
	}
return dl_size;
}

std::string datalink2str(int dl_id)
{
char str[128];

switch(dl_id) {
#ifdef DLT_NULL
caseDLT_NULL:
strcpy(str, "DLT_NULL");
break;
#endif
#ifdef DLT_EN10MB
caseDLT_EN10MB:
strcpy(str, "DLT_EN10MB");
break;
#endif
#ifdef DLT_IEEE802
caseDLT_IEEE802:
strcpy(str, "DLT_IEEE802");
break;
#endif
#ifdef DLT_ARCNET
caseDLT_ARCNET:
strcpy(str, "DLT_ARCNET");
break;
#endif
#ifdef DLT_FDDI
caseDLT_FDDI:
strcpy(str, "DLT_FDDI");
break;
#endif
#ifdef DLT_ATM_RFC1483
caseDLT_ATM_RFC1483:
strcpy(str, "DLT_ATM_RFC1483");
break;
#endif
#ifdef DLT_RAW
caseDLT_RAW:
strcpy(str, "DLT_RAW");
break;
#endif
#ifdef DLT_PPP_SERIAL
caseDLT_PPP_SERIAL:
strcpy(str, "DLT_PPP_SERIAL");
break;
#endif
#ifdef DLT_PPP_ETHER
caseDLT_PPP_ETHER:
strcpy(str, "DLT_PPP_ETHER");
break;
#endif
#ifdef DLT_C_HDLC
caseDLT_C_HDLC:
strcpy(str, "DLT_C_HDLC");
break;
#endif
#ifdef DLT_IEEE802_11
caseDLT_IEEE802_11:
strcpy(str, "DLT_IEEE802_11");
break;
#endif
#ifdef DLT_LOOP
caseDLT_LOOP:
strcpy(str, "DLT_LOOP");
break;
#endif
#ifdef DLT_LINUX_SLL
caseDLT_LINUX_SLL:
strcpy(str, "DLT_LINUX_SLL");
break;
#endif
#ifdef DLT_LTALK
caseDLT_LTALK:
strcpy(str, "DLT_LTALK");
break;
#endif
#ifdef DLT_PFLOG
caseDLT_PFLOG:
strcpy(str, "DLT_PFLOG");
break;
#endif
#ifdef DLT_PPP
caseDLT_PPP:
strcpy(str, "DLT_PPP");
break;
#endif
#ifdef DLT_SLIP
caseDLT_SLIP:
strcpy(str, "DLT_SLIP");
break;
#endif
#ifdef DLT_SLIP_BSDOS
caseDLT_SLIP_BSDOS:
strcpy(str, "DLT_SLIP_BSDOS");
break;
#endif
#ifdef DLT_PPP_BSDOS
caseDLT_PPP_BSDOS:
strcpy(str, "DLT_PPP_BSDOS");
break;
#endif

default:
sprintf(str, "UNKNOWN(0x%x)(%d)" , dl_id , dl_id);
break;

	}
returnstd::string(str);
}