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/*
* $smu-mark$
* $name: getlhs.c$
* $author: Salvatore Sanfilippo <antirez@invece.org>$
* $copyright: Copyright (C) 1999 by Salvatore Sanfilippo$
* $license: This software is under GPL version 2 of license$
* $date: Fri Nov 5 11:55:47 MET 1999$
* $rev: 8$
*/
/* $Id: getlhs.c,v 1.10 2003/07/25 12:11:24 njombart Exp $ */
#include <string.h>
#include "hping2.h"
#include "globals.h"
#if (!defined OSTYPE_LINUX) || (defined FORCE_LIBPCAP)
int get_linkhdr_size(char *ifname)
{
int dltype = pcap_datalink(pcapfp);
if (opt_debug)
printf("DEBUG: dltype is %d\n", dltype);
switch(dltype) {
case DLT_EN10MB:
case DLT_IEEE802:
linkhdr_size = 14;
break;
case DLT_SLIP:
case DLT_SLIP_BSDOS:
linkhdr_size = 16;
break;
case DLT_PPP:
case DLT_NULL:
#ifdef DLT_PPP_SERIAL
case DLT_PPP_SERIAL:
#endif
#ifdef DLT_LOOP
case DLT_LOOP:
#endif
linkhdr_size = 4;
break;
case DLT_PPP_BSDOS:
linkhdr_size = 24;
break;
case DLT_FDDI:
linkhdr_size = 13;
break;
case DLT_RAW:
linkhdr_size = 0;
break;
case DLT_IEEE802_11:
linkhdr_size = 14;
break;
case DLT_IEEE802_11:
linkhdr_size = 14;
break;
case DLT_TOKEN_RING:
linkhdr_size = 20;
break;
case DLT_ATM_RFC1483:
#ifdef DLT_CIP
case DLT_CIP:
#endif
#ifdef DLT_ATM_CLIP
case DLT_ATM_CLIP:
#endif
linkhdr_size = 8;
break;
#ifdef DLT_C_HDLC
case DLT_C_HDLC:
linkhdr_size = 4;
break;
#endif
#ifdef DLT_LINUX_SLL
case DLT_LINUX_SLL:
#endif
#ifdef DLT_LANE8023
case DLT_LANE8023:
#endif
linkhdr_size = 16;
break;
default:
return -1;
break;
}
return 0;
}
#else /* Linux... */
int get_linkhdr_size(char *ifname)
{
if ( strstr(ifname, "ppp") ) { /* also works for ippp (ISDN) */
linkhdr_size = PPPHDR_SIZE_LINUX;
return 0;
} else if ( strstr(ifname, "eth") ) {
linkhdr_size = ETHHDR_SIZE;
return 0;
} else if (strstr(ifname, "ets")) {
linkhdr_size = 0;
return 0;
} else if ( strstr(ifname, "lo") ) {
linkhdr_size = LOHDR_SIZE;
return 0;
} else if (strstr(ifname, "atm")) {
linkhdr_size = 0;
return 0;
} else if ( strstr(ifname, "wlan") ) {
linkhdr_size = WLANHDR_SIZE;
return 0;
} else if (strstr(ifname, "atm")) {
linkhdr_size = 0;
return 0;
} else if ( strstr(ifname, "wlan") ) {
linkhdr_size = WLANHDR_SIZE;
return 0;
} else if ( strstr(ifname, "tr") ) {
linkhdr_size = TRHDR_SIZE;
return 0;
}
else
return -1;
}
#endif /* (!defined OSTYPE_LINUX) || (defined FORCE_LIBPCAP) */
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