define.h

/**
   Definition of macro and header size

   Decoder - decode TLS/SSL traffic - save handshake and extract certificate

   Copyright (C) 2016-2024 Michele Campus <fci1908@gmail.com>

   This file is part of decoder.

   decoder is free software: you can redistribute it and/or modify it under the
   terms of the GNU General Public License as published by the Free Software
   Foundation, either version 3 of the License, or (at your option) any later
   version.

   decoder is distributed in the hope that it will be useful, but WITHOUT ANY
   WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
   A PARTICULAR PURPOSE. See the GNU General Public License for more details.

   You should have received a copy of the GNU General Public License along with
   decoder. If not, see <http://www.gnu.org/licenses/>.
**/
#ifndef DEFINE_H_
#define DEFINE_H_

/* Header offsets */
#define ETHHDR_SIZE                 14
#define TOKENRING_SIZE              22
#define PPPHDR_SIZE                  4
#define SLIPHDR_SIZE                16
#define RAWHDR_SIZE                  0
#define LOOPHDR_SIZE                 4
#define FDDIHDR_SIZE                21
#define ISDNHDR_SIZE                16
#define IEEE80211HDR_SIZE           32

#define IPv4                         4
#define IPv6                         6

/* IPV6 header length */
#define IPV6_HDR_LEN                40
/* UDP header length */
#define UDP_HDR_LEN                  8
/* SCTP header len */
#define SCTP_HDR_LEN                12

/* Ethernet protocol ID's from Ether Type field */
#define	ETHERTYPE_ARP		0x0806		/* Address resolution */
#define	ETHERTYPE_RARP	        0x8035		/* Reverse ARP */
#define ETHERTYPE_APPLETLK	0x809B		/* AppleTalk protocol */
#define ETHERTYPE_APPLEARP	0x80F3		/* AppleTalk ARP */
#define	ETHERTYPE_VLAN		0x8100		/* IEEE 802.1Q VLAN tagging */
#define	ETHERTYPE_IPv4		0x0800		/* IP */
#define	ETHERTYPE_IPv6		0x86dd		/* IP protocol version 6 */
#define ETHERTYPE_LOOPBACK	0x9000		/* used to test interfaces */
#define ETHERTYPE_MPLS_UNI      0x8847
#define ETHERTYPE_MPLS_MULTI    0x8848
#define ETHERTYPE_PPPoE_1       0x8863
#define ETHERTYPE_PPPoE         0x8864
#define ETHERTYPE_LLDP          0x88CC

/* SNAP extension */
#define SNAP                      0xaa

/* mask for FCF */
#define	WIFI_DATA                        0x2    /* 0000 0010 */
#define FCF_TYPE(fc)     (((fc) >> 2) & 0x3)    /* 0000 0011 = 0x3 */
#define FCF_SUBTYPE(fc)  (((fc) >> 4) & 0xF)    /* 0000 1111 = 0xF */
#define FCF_TO_DS(fc)        ((fc) & 0x0100)
#define FCF_FROM_DS(fc)      ((fc) & 0x0200)
/* mask for Bad FCF presence */
#define BAD_FCS                         0x50    /* 0101 0000 */

#endif