/*
 * Copyright (c) 1999 - 2003
 * NetGroup, Politecnico di Torino (Italy)
 * 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. Neither the name of the Politecnico di Torino nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 */

/** @ingroup packetapi
 *  @{ 
 */

/** @defgroup packet32h Packet.dll definitions and data structures
 *  Packet32.h contains the data structures and the definitions used by packet.dll.
 *  The file is used both by the Win9x and the WinNTx versions of packet.dll, and can be included
 *  by the applications that use the functions of this library
 *  @{
 */

#ifndef __PACKET32
#define __PACKET32

#include <winsock2.h>
#include "devioctl.h"
#ifdef HAVE_DAG_API
#include <dagc.h>
#endif /* HAVE_DAG_API */

// Working modes
#define PACKET_MODE_CAPT 0x0 ///< Capture mode
#define PACKET_MODE_STAT 0x1 ///< Statistical mode
#define PACKET_MODE_MON 0x2 ///< Monitoring mode
#define PACKET_MODE_DUMP 0x10 ///< Dump mode
#define PACKET_MODE_STAT_DUMP MODE_DUMP | MODE_STAT ///< Statistical dump Mode

// ioctls
#define FILE_DEVICE_PROTOCOL        0x8000

#define IOCTL_PROTOCOL_STATISTICS   CTL_CODE(FILE_DEVICE_PROTOCOL, 2 , METHOD_BUFFERED, FILE_ANY_ACCESS)
#define IOCTL_PROTOCOL_RESET        CTL_CODE(FILE_DEVICE_PROTOCOL, 3 , METHOD_BUFFERED, FILE_ANY_ACCESS)
#define IOCTL_PROTOCOL_READ         CTL_CODE(FILE_DEVICE_PROTOCOL, 4 , METHOD_BUFFERED, FILE_ANY_ACCESS)
#define IOCTL_PROTOCOL_WRITE        CTL_CODE(FILE_DEVICE_PROTOCOL, 5 , METHOD_BUFFERED, FILE_ANY_ACCESS)
#define IOCTL_PROTOCOL_MACNAME      CTL_CODE(FILE_DEVICE_PROTOCOL, 6 , METHOD_BUFFERED, FILE_ANY_ACCESS)
#define IOCTL_OPEN                  CTL_CODE(FILE_DEVICE_PROTOCOL, 7 , METHOD_BUFFERED, FILE_ANY_ACCESS)
#define IOCTL_CLOSE                 CTL_CODE(FILE_DEVICE_PROTOCOL, 8 , METHOD_BUFFERED, FILE_ANY_ACCESS)

#define	 pBIOCSETBUFFERSIZE 9592		///< IOCTL code: set kernel buffer size.
#define	 pBIOCSETF 9030					///< IOCTL code: set packet filtering program.
#define  pBIOCGSTATS 9031				///< IOCTL code: get the capture stats.
#define	 pBIOCSRTIMEOUT 7416			///< IOCTL code: set the read timeout.
#define	 pBIOCSMODE 7412				///< IOCTL code: set working mode.
#define	 pBIOCSWRITEREP 7413			///< IOCTL code: set number of physical repetions of every packet written by the app.
#define	 pBIOCSMINTOCOPY 7414			///< IOCTL code: set minimum amount of data in the kernel buffer that unlocks a read call.
#define	 pBIOCSETOID 2147483648			///< IOCTL code: set an OID value.
#define	 pBIOCQUERYOID 2147483652		///< IOCTL code: get an OID value.
#define	 pATTACHPROCESS 7117			///< IOCTL code: attach a process to the driver. Used in Win9x only.
#define	 pDETACHPROCESS 7118			///< IOCTL code: detach a process from the driver. Used in Win9x only.
#define  pBIOCSETDUMPFILENAME 9029		///< IOCTL code: set the name of a the file used by kernel dump mode.
#define  pBIOCEVNAME 7415				///< IOCTL code: get the name of the event that the driver signals when some data is present in the buffer.
#define  pBIOCSENDPACKETSNOSYNC 9032	///< IOCTL code: Send a buffer containing multiple packets to the network, ignoring the timestamps associated with the packets.
#define  pBIOCSENDPACKETSSYNC 9033		///< IOCTL code: Send a buffer containing multiple packets to the network, respecting the timestamps associated with the packets.
#define  pBIOCSETDUMPLIMITS 9034		///< IOCTL code: Set the dump file limits. See the PacketSetDumpLimits() function.
#define  pBIOCISDUMPENDED 7411			///< IOCTL code: Get the status of the kernel dump process. See the PacketIsDumpEnded() function.

#define  pBIOCSTIMEZONE 7471			///< IOCTL code: set time zone. Used in Win9x only.


/// Alignment macro. Defines the alignment size.
#define Packet_ALIGNMENT sizeof(int)
/// Alignment macro. Rounds up to the next even multiple of Packet_ALIGNMENT. 
#define Packet_WORDALIGN(x) (((x)+(Packet_ALIGNMENT-1))&~(Packet_ALIGNMENT-1))


#define NdisMediumNull	-1		// Custom linktype: NDIS doesn't provide an equivalent
#define NdisMediumCHDLC	-2		// Custom linktype: NDIS doesn't provide an equivalent
#define NdisMediumPPPSerial	-3	// Custom linktype: NDIS doesn't provide an equivalent

/*!
  \brief Network type structure.

  This structure is used by the PacketGetNetType() function to return information on the current adapter's type and speed.
*/
typedef struct NetType
{
	UINT LinkType;	///< The MAC of the current network adapter (see function PacketGetNetType() for more information)
	ULONGLONG LinkSpeed;	///< The speed of the network in bits per second
}NetType;


//some definitions stolen from libpcap

#ifndef BPF_MAJOR_VERSION

/*!
  \brief A BPF pseudo-assembly program.

  The program will be injected in the kernel by the PacketSetBPF() function and applied to every incoming packet. 
*/
struct bpf_program 
{
	UINT bf_len;				///< Indicates the number of instructions of the program, i.e. the number of struct bpf_insn that will follow.
	struct bpf_insn *bf_insns;	///< A pointer to the first instruction of the program.
};

/*!
  \brief A single BPF pseudo-instruction.

  bpf_insn contains a single instruction for the BPF register-machine. It is used to send a filter program to the driver.
*/
struct bpf_insn 
{
	USHORT	code;		///< Instruction type and addressing mode.
	UCHAR 	jt;			///< Jump if true
	UCHAR 	jf;			///< Jump if false
	int k;				///< Generic field used for various purposes.
};

/*!
  \brief Structure that contains a couple of statistics values on the current capture.

  It is used by packet.dll to return statistics about a capture session.
*/
struct bpf_stat 
{
	UINT bs_recv;		///< Number of packets that the driver received from the network adapter 
						///< from the beginning of the current capture. This value includes the packets 
						///< lost by the driver.
	UINT bs_drop;		///< number of packets that the driver lost from the beginning of a capture. 
						///< Basically, a packet is lost when the the buffer of the driver is full. 
						///< In this situation the packet cannot be stored and the driver rejects it.
	UINT ps_ifdrop;		///< drops by interface. XXX not yet supported
	UINT bs_capt;		///< number of packets that pass the filter, find place in the kernel buffer and
						///< thus reach the application.
};

/*!
  \brief Packet header.

  This structure defines the header associated with every packet delivered to the application.
*/
struct bpf_hdr 
{
	struct timeval	bh_tstamp;	///< The timestamp associated with the captured packet. 
								///< It is stored in a TimeVal structure.
	UINT	bh_caplen;			///< Length of captured portion. The captured portion <b>can be different</b>
								///< from the original packet, because it is possible (with a proper filter)
								///< to instruct the driver to capture only a portion of the packets.
	UINT	bh_datalen;			///< Original length of packet
	USHORT		bh_hdrlen;		///< Length of bpf header (this struct plus alignment padding). In some cases,
								///< a padding could be added between the end of this structure and the packet
								///< data for performance reasons. This filed can be used to retrieve the actual data 
								///< of the packet.
};

/*!
  \brief Dump packet header.

  This structure defines the header associated with the packets in a buffer to be used with PacketSendPackets().
  It is simpler than the bpf_hdr, because it corresponds to the header associated by WinPcap and libpcap to a
  packet in a dump file. This makes straightforward sending WinPcap dump files to the network.
*/
struct dump_bpf_hdr{
    struct timeval	ts;			///< Time stamp of the packet
    UINT			caplen;		///< Length of captured portion. The captured portion can smaller than the 
								///< the original packet, because it is possible (with a proper filter) to 
								///< instruct the driver to capture only a portion of the packets. 
    UINT			len;		///< Length of the original packet (off wire).
};


#endif

#define        DOSNAMEPREFIX   TEXT("Packet_")	///< Prefix added to the adapters device names to create the WinPcap devices
#define        MAX_LINK_NAME_LENGTH	64			//< Maximum length of the devices symbolic links
#define        NMAX_PACKET 65535

/*!
  \brief Addresses of a network adapter.

  This structure is used by the PacketGetNetInfoEx() function to return the IP addresses associated with 
  an adapter.
*/
typedef struct npf_if_addr {
	struct sockaddr_storage IPAddress;	///< IP address.
	struct sockaddr_storage SubnetMask;	///< Netmask for that address.
	struct sockaddr_storage Broadcast;	///< Broadcast address.
}npf_if_addr;