module pcap;
/* -*- Mode: c; tab-width: 8; indent-tabs-mode: 1; c-basic-offset: 8; -*- */
/*
 * Copyright (c) 1993, 1994, 1995, 1996, 1997
 *	The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the Computer Systems
 *	Engineering Group at Lawrence Berkeley Laboratory.
 * 4. Neither the name of the University nor of the Laboratory may be used
 *    to endorse or promote products derived from this software without
 *    specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * @(#) $Header: /tcpdump/master/libpcap/pcap/pcap.h,v 1.4.2.11 2008-10-06 15:38:39 gianluca Exp $ (LBL)
 */
 
 import bpf;
 
import std.c.time;

 version(Windows){
 //import pcapStdinc;
 import std.c.windows.winsock;
 }
version(OSX){
import std.c.osx.socket;
}
version(linux){
import std.c.linux.socket;
}
version(FreeBSD){
import std.c.freebsd.socket;
}
//import pcap.bpf;
import std.stdio;


extern (C) {

const PCAP_VERSION_MAJOR=2;
const PCAP_VERSION_MINOR=4;

const PCAP_ERRBUF_SIZE=256;

//incomplete c types, void * does the job?
alias void * pcap_t;
alias void * pcap_dumper_t;
alias pcap_if pcap_if_t;
alias pcap_addr pcap_addr_t;

/*
 * The first record in the file contains saved values for some
 * of the flags used in the printout phases of tcpdump.
 * Many fields here are 32 bit ints so compilers won't insert unwanted
 * padding; these files need to be interchangeable across architectures.
 *
 * Do not change the layout of this structure, in any way (this includes
 * changes that only affect the length of fields in this structure).
 *
 * Also, do not change the interpretation of any of the members of this
 * structure, in any way (this includes using values other than
 * LINKTYPE_ values, as defined in "savefile.c", in the "linktype"
 * field).
 *
 * Instead:
 *
 *	introduce a new structure for the new format, if the layout
 *	of the structure changed;
 *
 *	send mail to "tcpdump-workers@lists.tcpdump.org", requesting
 *	a new magic number for your new capture file format, and, when
 *	you get the new magic number, put it in "savefile.c";
 *
 *	use that magic number for save files with the changed file
 *	header;
 *
 *	make the code in "savefile.c" capable of reading files with
 *	the old file header as well as files with the new file header
 *	(using the magic number to determine the header format).
 *
 * Then supply the changes as a patch at
 *
 *	http://sourceforge.net/projects/libpcap/
 *
 * so that future versions of libpcap and programs that use it (such as
 * tcpdump) will be able to read your new capture file format.
 */
struct pcap_file_header {
	uint magic;
	ushort version_major;
	ushort version_minor;
	int thiszone;	/* gmt to local correction */
	uint sigfigs;	/* accuracy of timestamps */
	uint snaplen;	/* max length saved portion of each pkt */
	uint linktype;	/* data link type (LINKTYPE_*) */
}

/*
 * Macros for the value returned by pcap_datalink_ext().
 * 
 * If LT_FCS_LENGTH_PRESENT(x) is true, the LT_FCS_LENGTH(x) macro
 * gives the FCS length of packets in the capture.
 */
 //not even going to try...
/*#define LT_FCS_LENGTH_PRESENT(x)	((x) & 0x04000000)
#define LT_FCS_LENGTH(x)		(((x) & 0xF0000000) >> 28)
#define LT_FCS_DATALINK_EXT(x)		((((x) & 0xF) << 28) | 0x04000000)*/

enum pcap_direction_t{
       PCAP_D_INOUT = 0,
       PCAP_D_IN,
       PCAP_D_OUT
}

/*
 * Generic per-packet information, as supplied by libpcap.
 *
 * The time stamp can and should be a "struct timeval", regardless of
 * whether your system supports 32-bit tv_sec in "struct timeval",
 * 64-bit tv_sec in "struct timeval", or both if it supports both 32-bit
 * and 64-bit applications.  The on-disk format of savefiles uses 32-bit
 * tv_sec (and tv_usec); this structure is irrelevant to that.  32-bit
 * and 64-bit versions of libpcap, even if they're on the same platform,
 * should supply the appropriate version of "struct timeval", even if
 * that's not what the underlying packet capture mechanism supplies.
 */
struct pcap_pkthdr {
	
	timeval ts;	/* time stamp */
	uint caplen;	/* length of portion present */
	uint len;	/* length this packet (off wire) */
}

/*
 * As returned by the pcap_stats()
 */
struct pcap_stat {
	uint ps_recv;		/* number of packets received */
	uint ps_drop;		/* number of packets dropped */
	uint ps_ifdrop;	/* drops by interface XXX not yet supported */
	//NOT SUPPORTED
version(HAVE_REMOTE){
	uint ps_capt;		/* number of packets that are received by the application; please get rid off the Win32 ifdef */
	uint ps_sent;		/* number of packets sent by the server on the network */
	uint ps_netdrop;	/* number of packets lost on the network */
}
}


/*
 * Item in a list of interfaces.
 */
struct pcap_if {
	pcap_if *next;
	char *name;		/* name to hand to "pcap_open_live()" */
	char *description;	/* textual description of interface, or NULL */
	pcap_addr *addresses;
	uint flags;	/* PCAP_IF_ interface flags */
}

const PCAP_IF_LOOPBACK=	0x00000001;	/* interface is loopback */

/*
 * Representation of an interface address.
 */
struct pcap_addr {
	pcap_addr *next;
	sockaddr *addr;		/* address */
	sockaddr *netmask;	/* netmask for that address */
	sockaddr *broadaddr;	/* broadcast address for that address */
	sockaddr *dstaddr;	/* P2P destination address for that address */
}

/*alias void (*pcap_handler)(ubyte *, const struct pcap_pkthdr *,
			     const ubyte *);*/

/*
 * Error codes for the pcap API.
 * These will all be negative, so you can check for the success or
 * failure of a call that returns these codes by checking for a
 * negative value.
 */
const PCAP_ERROR		=	-1	;/* generic error code */
const PCAP_ERROR_BREAK	=	-2	;/* loop terminated by pcap_breakloop */
const PCAP_ERROR_NOT_ACTIVATED	=-3	;/* the capture needs to be activated */
const PCAP_ERROR_ACTIVATED		=-4	;/* the operation can't be performed on already activated captures */
const PCAP_ERROR_NO_SUCH_DEVICE	=-5	;/* no such device exists */
const PCAP_ERROR_RFMON_NOTSUP	=	-6;	/* this device doesn't support rfmon (monitor) mode */
const PCAP_ERROR_NOT_RFMON		=-7	;/* operation supported only in monitor mode */
const PCAP_ERROR_PERM_DENIED	=	-8;	/* no permission to open the device */
const PCAP_ERROR_IFACE_NOT_UP	=	-9;	/* interface isn't up */

/*
 * Warning codes for the pcap API.
 * These will all be positive and non-zero, so they won't look like
 * errors.
 */
const PCAP_WARNING		=	1;	/* generic warning code */
const PCAP_WARNING_PROMISC_NOTSUP	=2;	/* this device doesn't support promiscuous mode */

char	*pcap_lookupdev(char *);
int	pcap_lookupnet(const char *, uint *, uint *, char *);

pcap_t	*pcap_create(const char *, char *);
int	pcap_set_snaplen(pcap_t *, int);
int	pcap_set_promisc(pcap_t *, int);
int	pcap_can_set_rfmon(pcap_t *);
int	pcap_set_rfmon(pcap_t *, int);
int	pcap_set_timeout(pcap_t *, int);
int	pcap_set_buffer_size(pcap_t *, int);
int	pcap_activate(pcap_t *);

pcap_t	*pcap_open_live(const char *, int, int, int, char *);
pcap_t	*pcap_open_dead(int, int);
pcap_t	*pcap_open_offline(const char *, char *);

version(Windows){
pcap_t  *pcap_hopen_offline(void *_t, char *);
static pcap_t *pcap_fopen_offline(FILE *, char *);
}
else{
pcap_t	*pcap_fopen_offline(FILE *, char *);
}

void	pcap_close(pcap_t *);
//we don't have a definitio for pcap_handler so
alias void * pcap_handler;
int	pcap_loop(pcap_t *, int, pcap_handler, ubyte *);
int	pcap_dispatch(pcap_t *, int, pcap_handler, ubyte *);

 ubyte*
	pcap_next(pcap_t *,  pcap_pkthdr *);
int 	pcap_next_ex(pcap_t *,  pcap_pkthdr **, const ubyte **);
void	pcap_breakloop(pcap_t *);
int	pcap_stats(pcap_t *,  pcap_stat *);
int	pcap_setfilter(pcap_t *,  bpf_program *);
int 	pcap_setdirection(pcap_t *, pcap_direction_t);
int	pcap_getnonblock(pcap_t *, char *);
int	pcap_setnonblock(pcap_t *, int, char *);
int	pcap_inject(pcap_t *, const void *, size_t);
int	pcap_sendpacket(pcap_t *, const ubyte *, int);
char *pcap_statustostr(int);
char *pcap_strerror(int);
char	*pcap_geterr(pcap_t *);
void	pcap_perror(pcap_t *, char *);
int	pcap_compile(pcap_t *,  bpf_program *, const char *, int,
	    uint);
int	pcap_compile_nopcap(int, int,  bpf_program *,
	    const char *, int, uint);
void	pcap_freecode( bpf_program *);
int	pcap_offline_filter( bpf_program *, const  pcap_pkthdr *,
	    const ubyte *);
int	pcap_datalink(pcap_t *);
int	pcap_datalink_ext(pcap_t *);
int	pcap_list_datalinks(pcap_t *, int **);
int	pcap_set_datalink(pcap_t *, int);
void	pcap_free_datalinks(int *);
int	pcap_datalink_name_to_val(const char *);
 char *pcap_datalink_val_to_name(int);
 char *pcap_datalink_val_to_description(int);
int	pcap_snapshot(pcap_t *);
int	pcap_is_swapped(pcap_t *);
int	pcap_major_version(pcap_t *);
int	pcap_minor_version(pcap_t *);

/* XXX */
FILE	*pcap_file(pcap_t *);
int	pcap_fileno(pcap_t *);

pcap_dumper_t *pcap_dump_open(pcap_t *, const char *);
pcap_dumper_t *pcap_dump_fopen(pcap_t *, FILE *fp);
FILE	*pcap_dump_file(pcap_dumper_t *);
long	pcap_dump_ftell(pcap_dumper_t *);
int	pcap_dump_flush(pcap_dumper_t *);
void	pcap_dump_close(pcap_dumper_t *);
void	pcap_dump(ubyte *, const  pcap_pkthdr *, const ubyte *);

int	pcap_findalldevs(pcap_if_t **, char *);
void	pcap_freealldevs(pcap_if_t *);
char *pcap_lib_version();

/* XXX this guy lives in the bpf tree */
uint	bpf_filter(const  bpf_insn *, const ubyte *, uint, uint);
int	bpf_validate(const  bpf_insn *f, int len);
char	*bpf_image(const  bpf_insn *, int);
void	bpf_dump(const  bpf_program *, int);

version(Windows){
/*
 * Win32 definitions
 */

int pcap_setbuff(pcap_t *p, int dim);
int pcap_setmode(pcap_t *p, int mode);
int pcap_setmintocopy(pcap_t *p, int size);
}

const MODE_CAPT =0;
const MODE_STAT =1;
const MODE_MON =2;


version(Posix){

/*
 * UN*X definitions
 */

int	pcap_get_selectable_fd(pcap_t *);

}


//NOT SUPPORTED
version(HAVE_REMOTE){
import remoteExt;
}

}