/*      $NetBSD: pcap.h,v 1.11 2024/09/02 15:33:39 christos Exp $       */

/* -*- 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.
*/

/*
* Remote packet capture mechanisms and extensions from WinPcap:
*
* Copyright (c) 2002 - 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
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER 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.
*
*/

#ifndef lib_pcap_pcap_h
#define lib_pcap_pcap_h

/*
* Some software that uses libpcap/WinPcap/Npcap defines _MSC_VER before
* including pcap.h if it's not defined - and it defines it to 1500.
* (I'm looking at *you*, lwIP!)
*
* Attempt to detect this, and undefine _MSC_VER so that we can *reliably*
* use it to know what compiler is being used and, if it's Visual Studio,
* what version is being used.
*/
#if defined(_MSC_VER)
 /*
  * We assume here that software such as that doesn't define _MSC_FULL_VER
  * as well and that it defines _MSC_VER with a value > 1200.
  *
  * DO NOT BREAK THESE ASSUMPTIONS.  IF YOU FEEL YOU MUST DEFINE _MSC_VER
  * WITH A COMPILER THAT'S NOT MICROSOFT'S C COMPILER, PLEASE CONTACT
  * US SO THAT WE CAN MAKE IT SO THAT YOU DON'T HAVE TO DO THAT.  THANK
  * YOU.
  *
  * OK, is _MSC_FULL_VER defined?
  */
 #if !defined(_MSC_FULL_VER)
   /*
    * According to
    *
    *    https://sourceforge.net/p/predef/wiki/Compilers/
    *
    * with "Visual C++ 6.0 Processor Pack"/Visual C++ 6.0 SP6 and
    * later, _MSC_FULL_VER is defined, so either this is an older
    * version of Visual C++ or it's not Visual C++ at all.
    *
    * For Visual C++ 6.0, _MSC_VER is defined as 1200.
    */
   #if _MSC_VER > 1200
     /*
      * If this is Visual C++, _MSC_FULL_VER should be defined, so we
      * assume this isn't Visual C++, and undo the lie that it is.
      */
     #undef _MSC_VER
   #endif
 #endif
#endif

#include <pcap/funcattrs.h>

#include <pcap/pcap-inttypes.h>

#if defined(_WIN32)
 #include <winsock2.h>         /* u_int, u_char etc. */
 #include <io.h>               /* _get_osfhandle() */
#elif defined(MSDOS)
 #include <sys/types.h>        /* u_int, u_char etc. */
 #include <sys/socket.h>
#else /* UN*X */
 #include <sys/types.h>        /* u_int, u_char etc. */
 #include <sys/time.h>
#endif /* _WIN32/MSDOS/UN*X */

#include <pcap/socket.h>        /* for PCAP_SOCKET, as the active-mode rpcap APIs use it */

#ifndef PCAP_DONT_INCLUDE_PCAP_BPF_H
#include <pcap/bpf.h>
#else
#include <net/bpf.h>
#endif

#include <stdio.h>

#ifdef __cplusplus
extern "C" {
#endif

/*
* Version number of the current version of the pcap file format.
*
* NOTE: this is *NOT* the version number of the libpcap library.
* To fetch the version information for the version of libpcap
* you're using, use pcap_lib_version().
*/
#define PCAP_VERSION_MAJOR 2
#define PCAP_VERSION_MINOR 4

#define PCAP_ERRBUF_SIZE 256

/*
* Compatibility for systems that have a bpf.h that
* predates the bpf typedefs for 64-bit support.
*/
#if BPF_RELEASE - 0 < 199406
typedef int bpf_int32;
typedef u_int bpf_u_int32;
#endif

typedef struct pcap pcap_t;
typedef struct pcap_dumper pcap_dumper_t;
typedef struct pcap_if pcap_if_t;
typedef struct 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.
* Documentation: https://www.tcpdump.org/manpages/pcap-savefile.5.txt.
*
* 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 "[email protected]", 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 by forking the branch at
*
*      https://github.com/the-tcpdump-group/libpcap/tree/master
*
* and issuing a pull request, 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 {
       bpf_u_int32 magic;
       u_short version_major;
       u_short version_minor;
       bpf_int32 thiszone;     /* not used - SHOULD be filled with 0 */
       bpf_u_int32 sigfigs;    /* not used - SHOULD be filled with 0 */
       bpf_u_int32 snaplen;    /* max length saved portion of each pkt */
       bpf_u_int32 linktype;   /* data link type (LINKTYPE_*) */
};

/*
* Subfields of the field containing the link-layer header type.
*
* Link-layer header types are assigned for both pcap and
* pcapng, and the same value must work with both.  In pcapng,
* the link-layer header type field in an Interface Description
* Block is 16 bits, so only the bottommost 16 bits of the
* link-layer header type in a pcap file can be used for the
* header type value.
*
* In libpcap, the upper 16 bits, from the top down, are divided into:
*
*    A 4-bit "FCS length" field, to allow the FCS length to
*    be specified, just as it can be specified in the if_fcslen
*    field of the pcapng IDB.  The field is in units of 16 bits,
*    i.e. 1 means 16 bits of FCS, 2 means 32 bits of FCS, etc..
*
*    A reserved bit, which must be zero.
*
*    An "FCS length present" flag; if 0, the "FCS length" field
*    should be ignored, and if 1, the "FCS length" field should
*    be used.
*
*    10 reserved bits, which must be zero.  They were originally
*    intended to be used as a "class" field, allowing additional
*    classes of link-layer types to be defined, with a class value
*    of 0 indicating that the link-layer type is a LINKTYPE_ value.
*    A value of 0x224 was, at one point, used by NetBSD to define
*    "raw" packet types, with the lower 16 bits containing a
*    NetBSD AF_ value; see
*
*        https://marc.info/?l=tcpdump-workers&m=98296750229149&w=2
*
*    It's unknown whether those were ever used in capture files,
*    or if the intent was just to use it as a link-layer type
*    for BPF programs; NetBSD's libpcap used to support them in
*    the BPF code generator, but it no longer does so.  If it
*    was ever used in capture files, or if classes other than
*    "LINKTYPE_ value" are ever useful in capture files, we could
*    re-enable this, and use the reserved 16 bits following the
*    link-layer type in pcapng files to hold the class information
*    there.  (Note, BTW, that LINKTYPE_RAW/DLT_RAW is now being
*    interpreted by libpcap, tcpdump, and Wireshark as "raw IP",
*    including both IPv4 and IPv6, with the version number in the
*    header being checked to see which it is, not just "raw IPv4";
*    there are LINKTYPE_IPV4/DLT_IPV4 and LINKTYPE_IPV6/DLT_IPV6
*    values if "these are IPv{4,6} and only IPv{4,6} packets"
*    types are needed.)
*
*    Or we might be able to use it for other purposes.
*/
#define LT_LINKTYPE(x)                  ((x) & 0x0000FFFF)
#define LT_LINKTYPE_EXT(x)              ((x) & 0xFFFF0000)
#define LT_RESERVED1(x)                 ((x) & 0x03FF0000)
#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)

typedef enum {
      PCAP_D_INOUT = 0,
      PCAP_D_IN,
      PCAP_D_OUT
} pcap_direction_t;

/*
* 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 {
       struct timeval ts;      /* time stamp */
       bpf_u_int32 caplen;     /* length of portion present */
       bpf_u_int32 len;        /* length of this packet (off wire) */
};

/*
* As returned by the pcap_stats()
*/
struct pcap_stat {
       u_int ps_recv;          /* number of packets received */
       u_int ps_drop;          /* number of packets dropped */
       u_int ps_ifdrop;        /* drops by interface -- only supported on some platforms */
#ifdef _WIN32
       u_int ps_capt;          /* number of packets that reach the application */
       u_int ps_sent;          /* number of packets sent by the server on the network */
       u_int ps_netdrop;       /* number of packets lost on the network */
#endif /* _WIN32 */
};

#ifdef MSDOS
/*
* As returned by the pcap_stats_ex()
*/
struct pcap_stat_ex {
      u_long  rx_packets;        /* total packets received       */
      u_long  tx_packets;        /* total packets transmitted    */
      u_long  rx_bytes;          /* total bytes received         */
      u_long  tx_bytes;          /* total bytes transmitted      */
      u_long  rx_errors;         /* bad packets received         */
      u_long  tx_errors;         /* packet transmit problems     */
      u_long  rx_dropped;        /* no space in Rx buffers       */
      u_long  tx_dropped;        /* no space available for Tx    */
      u_long  multicast;         /* multicast packets received   */
      u_long  collisions;

      /* detailed rx_errors: */
      u_long  rx_length_errors;
      u_long  rx_over_errors;    /* receiver ring buff overflow  */
      u_long  rx_crc_errors;     /* recv'd pkt with crc error    */
      u_long  rx_frame_errors;   /* recv'd frame alignment error */
      u_long  rx_fifo_errors;    /* recv'r fifo overrun          */
      u_long  rx_missed_errors;  /* recv'r missed packet         */

      /* detailed tx_errors */
      u_long  tx_aborted_errors;
      u_long  tx_carrier_errors;
      u_long  tx_fifo_errors;
      u_long  tx_heartbeat_errors;
      u_long  tx_window_errors;
    };
#endif

/*
* Item in a list of interfaces.
*/
struct pcap_if {
       struct pcap_if *next;
       char *name;             /* name to hand to "pcap_open_live()" */
       char *description;      /* textual description of interface, or NULL */
       struct pcap_addr *addresses;
       bpf_u_int32 flags;      /* PCAP_IF_ interface flags */
};

#define PCAP_IF_LOOPBACK                                0x00000001      /* interface is loopback */
#define PCAP_IF_UP                                      0x00000002      /* interface is up */
#define PCAP_IF_RUNNING                                 0x00000004      /* interface is running */
#define PCAP_IF_WIRELESS                                0x00000008      /* interface is wireless (*NOT* necessarily Wi-Fi!) */
#define PCAP_IF_CONNECTION_STATUS                       0x00000030      /* connection status: */
#define PCAP_IF_CONNECTION_STATUS_UNKNOWN               0x00000000      /* unknown */
#define PCAP_IF_CONNECTION_STATUS_CONNECTED             0x00000010      /* connected */
#define PCAP_IF_CONNECTION_STATUS_DISCONNECTED          0x00000020      /* disconnected */
#define PCAP_IF_CONNECTION_STATUS_NOT_APPLICABLE        0x00000030      /* not applicable */

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

typedef void (*pcap_handler)(u_char *, const struct pcap_pkthdr *,
                            const u_char *);

/*
* 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.
*/
#define PCAP_ERROR                      -1      /* generic error code */
#define PCAP_ERROR_BREAK                -2      /* loop terminated by pcap_breakloop */
#define PCAP_ERROR_NOT_ACTIVATED        -3      /* the capture needs to be activated */
#define PCAP_ERROR_ACTIVATED            -4      /* the operation can't be performed on already activated captures */
#define PCAP_ERROR_NO_SUCH_DEVICE       -5      /* no such device exists */
#define PCAP_ERROR_RFMON_NOTSUP         -6      /* this device doesn't support rfmon (monitor) mode */
#define PCAP_ERROR_NOT_RFMON            -7      /* operation supported only in monitor mode */
#define PCAP_ERROR_PERM_DENIED          -8      /* no permission to open the device */
#define PCAP_ERROR_IFACE_NOT_UP         -9      /* interface isn't up */
#define PCAP_ERROR_CANTSET_TSTAMP_TYPE  -10     /* this device doesn't support setting the time stamp type */
#define PCAP_ERROR_PROMISC_PERM_DENIED  -11     /* you don't have permission to capture in promiscuous mode */
#define PCAP_ERROR_TSTAMP_PRECISION_NOTSUP -12  /* the requested time stamp precision is not supported */
#define PCAP_ERROR_CAPTURE_NOTSUP       -13     /* capture mechanism not available */

/*
* Warning codes for the pcap API.
* These will all be positive and non-zero, so they won't look like
* errors.
*/
#define PCAP_WARNING                    1       /* generic warning code */
#define PCAP_WARNING_PROMISC_NOTSUP     2       /* this device doesn't support promiscuous mode */
#define PCAP_WARNING_TSTAMP_TYPE_NOTSUP 3       /* the requested time stamp type is not supported */

/*
* Value to pass to pcap_compile() as the netmask if you don't know what
* the netmask is.
*/
#define PCAP_NETMASK_UNKNOWN    0xffffffff

/*
* Initialize pcap.  If this isn't called, pcap is initialized to
* a mode source-compatible and binary-compatible with older versions
* that lack this routine.
*/

/*
* Initialization options.
* All bits not listed here are reserved for expansion.
*
* On UNIX-like systems, the local character encoding is assumed to be
* UTF-8, so no character encoding transformations are done.
*
* On Windows, the local character encoding is the local ANSI code page.
*/
#define PCAP_CHAR_ENC_LOCAL     0x00000000U     /* strings are in the local character encoding */
#define PCAP_CHAR_ENC_UTF_8     0x00000001U     /* strings are in UTF-8 */

PCAP_AVAILABLE_1_10
PCAP_API int    pcap_init(unsigned int, char *);

/*
* We're deprecating pcap_lookupdev() for various reasons (not
* thread-safe, can behave weirdly with WinPcap).  Callers
* should use pcap_findalldevs() and use the first device.
*/
PCAP_AVAILABLE_0_4
PCAP_DEPRECATED("use 'pcap_findalldevs' and use the first device")
PCAP_API char   *pcap_lookupdev(char *);

PCAP_AVAILABLE_0_4
PCAP_API int    pcap_lookupnet(const char *, bpf_u_int32 *, bpf_u_int32 *, char *);

PCAP_AVAILABLE_1_0
PCAP_API pcap_t *pcap_create(const char *, char *);

PCAP_AVAILABLE_1_0
PCAP_API int    pcap_set_snaplen(pcap_t *, int);

PCAP_AVAILABLE_1_0
PCAP_API int    pcap_set_promisc(pcap_t *, int);

PCAP_AVAILABLE_1_0
PCAP_API int    pcap_can_set_rfmon(pcap_t *);

PCAP_AVAILABLE_1_0
PCAP_API int    pcap_set_rfmon(pcap_t *, int);

PCAP_AVAILABLE_1_0
PCAP_API int    pcap_set_timeout(pcap_t *, int);

PCAP_AVAILABLE_1_2
PCAP_API int    pcap_set_tstamp_type(pcap_t *, int);

PCAP_AVAILABLE_1_5
PCAP_API int    pcap_set_immediate_mode(pcap_t *, int);

PCAP_AVAILABLE_1_0
PCAP_API int    pcap_set_buffer_size(pcap_t *, int);

PCAP_AVAILABLE_1_5
PCAP_API int    pcap_set_tstamp_precision(pcap_t *, int);

PCAP_AVAILABLE_1_5
PCAP_API int    pcap_get_tstamp_precision(pcap_t *);

PCAP_AVAILABLE_1_0
PCAP_API int    pcap_activate(pcap_t *);

PCAP_AVAILABLE_1_2
PCAP_API int    pcap_list_tstamp_types(pcap_t *, int **);

PCAP_AVAILABLE_1_2
PCAP_API void   pcap_free_tstamp_types(int *);

PCAP_AVAILABLE_1_2
PCAP_API int    pcap_tstamp_type_name_to_val(const char *);

PCAP_AVAILABLE_1_2
PCAP_API const char *pcap_tstamp_type_val_to_name(int);

PCAP_AVAILABLE_1_2
PCAP_API const char *pcap_tstamp_type_val_to_description(int);

#ifdef __linux__
PCAP_AVAILABLE_1_9
PCAP_API int    pcap_set_protocol_linux(pcap_t *, int);
#endif

/*
* Time stamp types.
* Not all systems and interfaces will necessarily support all of these.
*
* A system that supports PCAP_TSTAMP_HOST is offering time stamps
* provided by the host machine, rather than by the capture device,
* but not committing to any characteristics of the time stamp.
*
* PCAP_TSTAMP_HOST_LOWPREC is a time stamp, provided by the host machine,
* that's low-precision but relatively cheap to fetch; it's normally done
* using the system clock, so it's normally synchronized with times you'd
* fetch from system calls.
*
* PCAP_TSTAMP_HOST_HIPREC is a time stamp, provided by the host machine,
* that's high-precision; it might be more expensive to fetch.  It is
* synchronized with the system clock.
*
* PCAP_TSTAMP_HOST_HIPREC_UNSYNCED is a time stamp, provided by the host
* machine, that's high-precision; it might be more expensive to fetch.
* It is not synchronized with the system clock, and might have
* problems with time stamps for packets received on different CPUs,
* depending on the platform.  It might be more likely to be strictly
* monotonic than PCAP_TSTAMP_HOST_HIPREC.
*
* PCAP_TSTAMP_ADAPTER is a high-precision time stamp supplied by the
* capture device; it's synchronized with the system clock.
*
* PCAP_TSTAMP_ADAPTER_UNSYNCED is a high-precision time stamp supplied by
* the capture device; it's not synchronized with the system clock.
*
* Note that time stamps synchronized with the system clock can go
* backwards, as the system clock can go backwards.  If a clock is
* not in sync with the system clock, that could be because the
* system clock isn't keeping accurate time, because the other
* clock isn't keeping accurate time, or both.
*
* Note that host-provided time stamps generally correspond to the
* time when the time-stamping code sees the packet; this could
* be some unknown amount of time after the first or last bit of
* the packet is received by the network adapter, due to batching
* of interrupts for packet arrival, queueing delays, etc..
*/
#define PCAP_TSTAMP_HOST                        0       /* host-provided, unknown characteristics */
#define PCAP_TSTAMP_HOST_LOWPREC                1       /* host-provided, low precision, synced with the system clock */
#define PCAP_TSTAMP_HOST_HIPREC                 2       /* host-provided, high precision, synced with the system clock */
#define PCAP_TSTAMP_ADAPTER                     3       /* device-provided, synced with the system clock */
#define PCAP_TSTAMP_ADAPTER_UNSYNCED            4       /* device-provided, not synced with the system clock */
#define PCAP_TSTAMP_HOST_HIPREC_UNSYNCED        5       /* host-provided, high precision, not synced with the system clock */

/*
* Time stamp resolution types.
* Not all systems and interfaces will necessarily support all of these
* resolutions when doing live captures; all of them can be requested
* when reading a savefile.
*/
#define PCAP_TSTAMP_PRECISION_MICRO     0       /* use timestamps with microsecond precision, default */
#define PCAP_TSTAMP_PRECISION_NANO      1       /* use timestamps with nanosecond precision */

PCAP_AVAILABLE_0_4
PCAP_API pcap_t *pcap_open_live(const char *, int, int, int, char *);

PCAP_AVAILABLE_0_6
PCAP_API pcap_t *pcap_open_dead(int, int);

PCAP_AVAILABLE_1_5
PCAP_API pcap_t *pcap_open_dead_with_tstamp_precision(int, int, u_int);

PCAP_AVAILABLE_1_5
PCAP_API pcap_t *pcap_open_offline_with_tstamp_precision(const char *, u_int, char *);

PCAP_AVAILABLE_0_4
PCAP_API pcap_t *pcap_open_offline(const char *, char *);

#ifdef _WIN32
 PCAP_AVAILABLE_1_5
 PCAP_API pcap_t  *pcap_hopen_offline_with_tstamp_precision(intptr_t, u_int, char *);

 PCAP_API pcap_t  *pcap_hopen_offline(intptr_t, char *);
 /*
  * If we're building libpcap, these are internal routines in savefile.c,
  * so we must not define them as macros.
  *
  * If we're not building libpcap, given that the version of the C runtime
  * with which libpcap was built might be different from the version
  * of the C runtime with which an application using libpcap was built,
  * and that a FILE structure may differ between the two versions of the
  * C runtime, calls to _fileno() must use the version of _fileno() in
  * the C runtime used to open the FILE *, not the version in the C
  * runtime with which libpcap was built.  (Maybe once the Universal CRT
  * rules the world, this will cease to be a problem.)
  */
 #ifndef BUILDING_PCAP
   #define pcap_fopen_offline_with_tstamp_precision(f,p,b) \
       pcap_hopen_offline_with_tstamp_precision(_get_osfhandle(_fileno(f)), p, b)
   #define pcap_fopen_offline(f,b) \
       pcap_hopen_offline(_get_osfhandle(_fileno(f)), b)
 #endif
#else /*_WIN32*/
 PCAP_AVAILABLE_1_5
 PCAP_API pcap_t       *pcap_fopen_offline_with_tstamp_precision(FILE *, u_int, char *);

 PCAP_AVAILABLE_0_9
 PCAP_API pcap_t       *pcap_fopen_offline(FILE *, char *);
#endif /*_WIN32*/

PCAP_AVAILABLE_0_4
PCAP_API void   pcap_close(pcap_t *);

PCAP_AVAILABLE_0_4
PCAP_API int    pcap_loop(pcap_t *, int, pcap_handler, u_char *);

PCAP_AVAILABLE_0_4
PCAP_API int    pcap_dispatch(pcap_t *, int, pcap_handler, u_char *);

PCAP_AVAILABLE_0_4
PCAP_API const u_char *pcap_next(pcap_t *, struct pcap_pkthdr *);

PCAP_AVAILABLE_0_8
PCAP_API int    pcap_next_ex(pcap_t *, struct pcap_pkthdr **, const u_char **);

PCAP_AVAILABLE_0_8
PCAP_API void   pcap_breakloop(pcap_t *);

PCAP_AVAILABLE_0_4
PCAP_API int    pcap_stats(pcap_t *, struct pcap_stat *);

PCAP_AVAILABLE_0_4
PCAP_API int    pcap_setfilter(pcap_t *, struct bpf_program *);

PCAP_AVAILABLE_0_9
PCAP_API int    pcap_setdirection(pcap_t *, pcap_direction_t);

PCAP_AVAILABLE_0_7
PCAP_API int    pcap_getnonblock(pcap_t *, char *);

PCAP_AVAILABLE_0_7
PCAP_API int    pcap_setnonblock(pcap_t *, int, char *);

PCAP_AVAILABLE_0_9
PCAP_API int    pcap_inject(pcap_t *, const void *, size_t);

PCAP_AVAILABLE_0_8
PCAP_API int    pcap_sendpacket(pcap_t *, const u_char *, int);

PCAP_AVAILABLE_1_0
PCAP_API const char *pcap_statustostr(int);

PCAP_AVAILABLE_0_4
PCAP_API const char *pcap_strerror(int);

PCAP_AVAILABLE_0_4
PCAP_API char   *pcap_geterr(pcap_t *);

PCAP_AVAILABLE_0_4
PCAP_API void   pcap_perror(pcap_t *, const char *);

PCAP_AVAILABLE_0_4
PCAP_API int    pcap_compile(pcap_t *, struct bpf_program *, const char *, int,
           bpf_u_int32);

PCAP_AVAILABLE_0_5
PCAP_DEPRECATED("use pcap_open_dead(), pcap_compile() and pcap_close()")
PCAP_API int    pcap_compile_nopcap(int, int, struct bpf_program *,
           const char *, int, bpf_u_int32);

/* XXX - this took two arguments in 0.4 and 0.5 */
PCAP_AVAILABLE_0_6
PCAP_API void   pcap_freecode(struct bpf_program *);

PCAP_AVAILABLE_1_0
PCAP_API int    pcap_offline_filter(const struct bpf_program *,
           const struct pcap_pkthdr *, const u_char *);

PCAP_AVAILABLE_0_4
PCAP_API int    pcap_datalink(pcap_t *);

PCAP_AVAILABLE_1_0
PCAP_API int    pcap_datalink_ext(pcap_t *);

PCAP_AVAILABLE_0_8
PCAP_API int    pcap_list_datalinks(pcap_t *, int **);

PCAP_AVAILABLE_0_8
PCAP_API int    pcap_set_datalink(pcap_t *, int);

PCAP_AVAILABLE_0_8
PCAP_API void   pcap_free_datalinks(int *);

PCAP_AVAILABLE_0_8
PCAP_API int    pcap_datalink_name_to_val(const char *);

PCAP_AVAILABLE_0_8
PCAP_API const char *pcap_datalink_val_to_name(int);

PCAP_AVAILABLE_0_8
PCAP_API const char *pcap_datalink_val_to_description(int);

PCAP_AVAILABLE_1_9
PCAP_API const char *pcap_datalink_val_to_description_or_dlt(int);

PCAP_AVAILABLE_0_4
PCAP_API int    pcap_snapshot(pcap_t *);

PCAP_AVAILABLE_0_4
PCAP_API int    pcap_is_swapped(pcap_t *);

PCAP_AVAILABLE_0_4
PCAP_API int    pcap_major_version(pcap_t *);

PCAP_AVAILABLE_0_4
PCAP_API int    pcap_minor_version(pcap_t *);

PCAP_AVAILABLE_1_9
PCAP_API int    pcap_bufsize(pcap_t *);

/* XXX */
PCAP_AVAILABLE_0_4
PCAP_API FILE   *pcap_file(pcap_t *);

#ifdef _WIN32
/*
* This probably shouldn't have been kept in WinPcap; most if not all
* UN*X code that used it won't work on Windows.  We deprecate it; if
* anybody really needs access to whatever HANDLE may be associated
* with a pcap_t (there's no guarantee that there is one), we can add
* a Windows-only pcap_handle() API that returns the HANDLE.
*/
PCAP_AVAILABLE_0_4
PCAP_DEPRECATED("request a 'pcap_handle' that returns a HANDLE if you need it")
PCAP_API int    pcap_fileno(pcap_t *);
#else /* _WIN32 */
PCAP_AVAILABLE_0_4
PCAP_API int    pcap_fileno(pcap_t *);
#endif /* _WIN32 */

#ifdef _WIN32
 PCAP_API int  pcap_wsockinit(void);
#endif

PCAP_AVAILABLE_0_4
PCAP_API pcap_dumper_t *pcap_dump_open(pcap_t *, const char *);

#ifdef _WIN32
 PCAP_AVAILABLE_0_9
 PCAP_API pcap_dumper_t *pcap_dump_hopen(pcap_t *, intptr_t);

 /*
  * If we're building libpcap, this is an internal routine in sf-pcap.c, so
  * we must not define it as a macro.
  *
  * If we're not building libpcap, given that the version of the C runtime
  * with which libpcap was built might be different from the version
  * of the C runtime with which an application using libpcap was built,
  * and that a FILE structure may differ between the two versions of the
  * C runtime, calls to _fileno() must use the version of _fileno() in
  * the C runtime used to open the FILE *, not the version in the C
  * runtime with which libpcap was built.  (Maybe once the Universal CRT
  * rules the world, this will cease to be a problem.)
  */
 #ifndef BUILDING_PCAP
   #define pcap_dump_fopen(p,f) \
       pcap_dump_hopen(p, _get_osfhandle(_fileno(f)))
 #endif
#else /*_WIN32*/
 PCAP_AVAILABLE_0_9
 PCAP_API pcap_dumper_t *pcap_dump_fopen(pcap_t *, FILE *fp);
#endif /*_WIN32*/

PCAP_AVAILABLE_1_7
PCAP_API pcap_dumper_t *pcap_dump_open_append(pcap_t *, const char *);

PCAP_AVAILABLE_0_8
PCAP_API FILE   *pcap_dump_file(pcap_dumper_t *);

PCAP_AVAILABLE_0_9
PCAP_API long   pcap_dump_ftell(pcap_dumper_t *);

PCAP_AVAILABLE_1_9
PCAP_API int64_t        pcap_dump_ftell64(pcap_dumper_t *);

PCAP_AVAILABLE_0_8
PCAP_API int    pcap_dump_flush(pcap_dumper_t *);

PCAP_AVAILABLE_0_4
PCAP_API void   pcap_dump_close(pcap_dumper_t *);

PCAP_AVAILABLE_0_4
PCAP_API void   pcap_dump(u_char *, const struct pcap_pkthdr *, const u_char *);

PCAP_AVAILABLE_0_7
PCAP_API int    pcap_findalldevs(pcap_if_t **, char *);

PCAP_AVAILABLE_0_7
PCAP_API void   pcap_freealldevs(pcap_if_t *);

/*
* We return a pointer to the version string, rather than exporting the
* version string directly.
*
* On at least some UNIXes, if you import data from a shared library into
* a program, the data is bound into the program binary, so if the string
* in the version of the library with which the program was linked isn't
* the same as the string in the version of the library with which the
* program is being run, various undesirable things may happen (warnings,
* the string being the one from the version of the library with which the
* program was linked, or even weirder things, such as the string being the
* one from the library but being truncated).
*
* On Windows, the string is constructed at run time.
*/
PCAP_AVAILABLE_0_8
PCAP_API const char *pcap_lib_version(void);

#if defined(_WIN32)

 /*
  * Win32 definitions
  */

 /*!
   \brief A queue of raw packets that will be sent to the network with pcap_sendqueue_transmit().
 */
 struct pcap_send_queue
 {
       u_int maxlen;   /* Maximum size of the queue, in bytes. This
                          variable contains the size of the buffer field. */
       u_int len;      /* Current size of the queue, in bytes. */
       char *buffer;   /* Buffer containing the packets to be sent. */
 };

 typedef struct pcap_send_queue pcap_send_queue;

 /*!
   \brief This typedef is a support for the pcap_get_airpcap_handle() function
 */
 #if !defined(AIRPCAP_HANDLE__EAE405F5_0171_9592_B3C2_C19EC426AD34__DEFINED_)
   #define AIRPCAP_HANDLE__EAE405F5_0171_9592_B3C2_C19EC426AD34__DEFINED_
   typedef struct _AirpcapHandle *PAirpcapHandle;
 #endif

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

 PCAP_API HANDLE pcap_getevent(pcap_t *p);

 PCAP_AVAILABLE_1_8
 PCAP_API int pcap_oid_get_request(pcap_t *, bpf_u_int32, void *, size_t *);

 PCAP_AVAILABLE_1_8
 PCAP_API int pcap_oid_set_request(pcap_t *, bpf_u_int32, const void *, size_t *);

 PCAP_API pcap_send_queue* pcap_sendqueue_alloc(u_int memsize);

 PCAP_API void pcap_sendqueue_destroy(pcap_send_queue* queue);

 PCAP_API int pcap_sendqueue_queue(pcap_send_queue* queue, const struct pcap_pkthdr *pkt_header, const u_char *pkt_data);

 PCAP_API u_int pcap_sendqueue_transmit(pcap_t *p, pcap_send_queue* queue, int sync);

 PCAP_API struct pcap_stat *pcap_stats_ex(pcap_t *p, int *pcap_stat_size);

 PCAP_API int pcap_setuserbuffer(pcap_t *p, int size);

 PCAP_API int pcap_live_dump(pcap_t *p, char *filename, int maxsize, int maxpacks);

 PCAP_API int pcap_live_dump_ended(pcap_t *p, int sync);

 PCAP_API int pcap_start_oem(char* err_str, int flags);

 PCAP_API PAirpcapHandle pcap_get_airpcap_handle(pcap_t *p);

 #define MODE_CAPT 0
 #define MODE_STAT 1
 #define MODE_MON 2

#elif defined(MSDOS)

 /*
  * MS-DOS definitions
  */

 PCAP_API int  pcap_stats_ex (pcap_t *, struct pcap_stat_ex *);
 PCAP_API void pcap_set_wait (pcap_t *p, void (*yield)(void), int wait);
 PCAP_API u_long pcap_mac_packets (void);

#else /* UN*X */

 /*
  * UN*X definitions
  */

 PCAP_AVAILABLE_0_8
 PCAP_API int  pcap_get_selectable_fd(pcap_t *);

 PCAP_AVAILABLE_1_9
 PCAP_API const struct timeval *pcap_get_required_select_timeout(pcap_t *);

#endif /* _WIN32/MSDOS/UN*X */

/*
* Remote capture definitions.
*
* These routines are only present if libpcap has been configured to
* include remote capture support.
*/

/*
* The maximum buffer size in which address, port, interface names are kept.
*
* In case the adapter name or such is larger than this value, it is truncated.
* This is not used by the user; however it must be aware that an hostname / interface
* name longer than this value will be truncated.
*/
#define PCAP_BUF_SIZE 1024

/*
* The type of input source, passed to pcap_open().
*/
#define PCAP_SRC_FILE           2       /* local savefile */
#define PCAP_SRC_IFLOCAL        3       /* local network interface */
#define PCAP_SRC_IFREMOTE       4       /* interface on a remote host, using RPCAP */

/*
* The formats allowed by pcap_open() are the following:
* - file://path_and_filename [opens a local file]
* - rpcap://devicename [opens the selected device available on the local host, without using the RPCAP protocol]
* - rpcap://host/devicename [opens the selected device available on a remote host]
* - rpcap://host:port/devicename [opens the selected device available on a remote host, using a non-standard port for RPCAP]
* - adaptername [to open a local adapter; kept for compatibility, but it is strongly discouraged]
* - (NULL) [to open the first local adapter; kept for compatibility, but it is strongly discouraged]
*
* The formats allowed by the pcap_findalldevs_ex() are the following:
* - file://folder/ [lists all the files in the given folder]
* - rpcap:// [lists all local adapters]
* - rpcap://host:port/ [lists the devices available on a remote host]
*
* In all the above, "rpcaps://" can be substituted for "rpcap://" to enable
* SSL (if it has been compiled in).
*
* Referring to the 'host' and 'port' parameters, they can be either numeric or literal. Since
* IPv6 is fully supported, these are the allowed formats:
*
* - host (literal): e.g. host.foo.bar
* - host (numeric IPv4): e.g. 10.11.12.13
* - host (numeric IPv4, IPv6 style): e.g. [10.11.12.13]
* - host (numeric IPv6): e.g. [1:2:3::4]
* - port: can be either numeric (e.g. '80') or literal (e.g. 'http')
*
* Here you find some allowed examples:
* - rpcap://host.foo.bar/devicename [everything literal, no port number]
* - rpcap://host.foo.bar:1234/devicename [everything literal, with port number]
* - rpcap://10.11.12.13/devicename [IPv4 numeric, no port number]
* - rpcap://10.11.12.13:1234/devicename [IPv4 numeric, with port number]
* - rpcap://[10.11.12.13]:1234/devicename [IPv4 numeric with IPv6 format, with port number]
* - rpcap://[1:2:3::4]/devicename [IPv6 numeric, no port number]
* - rpcap://[1:2:3::4]:1234/devicename [IPv6 numeric, with port number]
* - rpcap://[1:2:3::4]:http/devicename [IPv6 numeric, with literal port number]
*/

/*
* URL schemes for capture source.
*/
/*
* This string indicates that the user wants to open a capture from a
* local file.
*/
#define PCAP_SRC_FILE_STRING "file://"
/*
* This string indicates that the user wants to open a capture from a
* network interface.  This string does not necessarily involve the use
* of the RPCAP protocol. If the interface required resides on the local
* host, the RPCAP protocol is not involved and the local functions are used.
*/
#define PCAP_SRC_IF_STRING "rpcap://"

/*
* Flags to pass to pcap_open().
*/

/*
* Specifies whether promiscuous mode is to be used.
*/
#define PCAP_OPENFLAG_PROMISCUOUS               0x00000001

/*
* Specifies, for an RPCAP capture, whether the data transfer (in
* case of a remote capture) has to be done with UDP protocol.
*
* If it is '1' if you want a UDP data connection, '0' if you want
* a TCP data connection; control connection is always TCP-based.
* A UDP connection is much lighter, but it does not guarantee that all
* the captured packets arrive to the client workstation. Moreover,
* it could be harmful in case of network congestion.
* This flag is meaningless if the source is not a remote interface.
* In that case, it is simply ignored.
*/
#define PCAP_OPENFLAG_DATATX_UDP                0x00000002

/*
* Specifies whether the remote probe will capture its own generated
* traffic.
*
* In case the remote probe uses the same interface to capture traffic
* and to send data back to the caller, the captured traffic includes
* the RPCAP traffic as well.  If this flag is turned on, the RPCAP
* traffic is excluded from the capture, so that the trace returned
* back to the collector is does not include this traffic.
*
* Has no effect on local interfaces or savefiles.
*/
#define PCAP_OPENFLAG_NOCAPTURE_RPCAP           0x00000004

/*
* Specifies whether the local adapter will capture its own generated traffic.
*
* This flag tells the underlying capture driver to drop the packets
* that were sent by itself.  This is useful when building applications
* such as bridges that should ignore the traffic they just sent.
*
* Supported only on Windows.
*/
#define PCAP_OPENFLAG_NOCAPTURE_LOCAL           0x00000008

/*
* This flag configures the adapter for maximum responsiveness.
*
* In presence of a large value for nbytes, WinPcap waits for the arrival
* of several packets before copying the data to the user. This guarantees
* a low number of system calls, i.e. lower processor usage, i.e. better
* performance, which is good for applications like sniffers. If the user
* sets the PCAP_OPENFLAG_MAX_RESPONSIVENESS flag, the capture driver will
* copy the packets as soon as the application is ready to receive them.
* This is suggested for real time applications (such as, for example,
* a bridge) that need the best responsiveness.
*
* The equivalent with pcap_create()/pcap_activate() is "immediate mode".
*/
#define PCAP_OPENFLAG_MAX_RESPONSIVENESS        0x00000010

/*
* Remote authentication methods.
* These are used in the 'type' member of the pcap_rmtauth structure.
*/

/*
* NULL authentication.
*
* The 'NULL' authentication has to be equal to 'zero', so that old
* applications can just put every field of struct pcap_rmtauth to zero,
* and it does work.
*/
#define RPCAP_RMTAUTH_NULL 0
/*
* Username/password authentication.
*
* With this type of authentication, the RPCAP protocol will use the username/
* password provided to authenticate the user on the remote machine. If the
* authentication is successful (and the user has the right to open network
* devices) the RPCAP connection will continue; otherwise it will be dropped.
*
* *******NOTE********: unless TLS is being used, the username and password
* are sent over the network to the capture server *IN CLEAR TEXT*.  Don't
* use this, without TLS (i.e., with rpcap:// rather than rpcaps://) on
* a network that you don't completely control!  (And be *really* careful
* in your definition of "completely"!)
*/
#define RPCAP_RMTAUTH_PWD 1

/*
* This structure keeps the information needed to authenticate the user
* on a remote machine.
*
* The remote machine can either grant or refuse the access according
* to the information provided.
* In case the NULL authentication is required, both 'username' and
* 'password' can be NULL pointers.
*
* This structure is meaningless if the source is not a remote interface;
* in that case, the functions which requires such a structure can accept
* a NULL pointer as well.
*/
struct pcap_rmtauth
{
       /*
        * \brief Type of the authentication required.
        *
        * In order to provide maximum flexibility, we can support different types
        * of authentication based on the value of this 'type' variable. The currently
        * supported authentication methods are defined into the
        * \link remote_auth_methods Remote Authentication Methods Section\endlink.
        */
       int type;
       /*
        * \brief Zero-terminated string containing the username that has to be
        * used on the remote machine for authentication.
        *
        * This field is meaningless in case of the RPCAP_RMTAUTH_NULL authentication
        * and it can be NULL.
        */
       char *username;
       /*
        * \brief Zero-terminated string containing the password that has to be
        * used on the remote machine for authentication.
        *
        * This field is meaningless in case of the RPCAP_RMTAUTH_NULL authentication
        * and it can be NULL.
        */
       char *password;
};

/*
* This routine can open a savefile, a local device, or a device on
* a remote machine running an RPCAP server.
*
* For opening a savefile, the pcap_open_offline routines can be used,
* and will work just as well; code using them will work on more
* platforms than code using pcap_open() to open savefiles.
*
* For opening a local device, pcap_open_live() can be used; it supports
* most of the capabilities that pcap_open() supports, and code using it
* will work on more platforms than code using pcap_open().  pcap_create()
* and pcap_activate() can also be used; they support all capabilities
* that pcap_open() supports, except for the Windows-only
* PCAP_OPENFLAG_NOCAPTURE_LOCAL, and support additional capabilities.
*
* For opening a remote capture, pcap_open() is currently the only
* API available.
*/
PCAP_AVAILABLE_1_9_REMOTE
PCAP_API pcap_t *pcap_open(const char *source, int snaplen, int flags,
           int read_timeout, struct pcap_rmtauth *auth, char *errbuf);

PCAP_AVAILABLE_1_9_REMOTE
PCAP_API int    pcap_createsrcstr(char *source, int type, const char *host,
           const char *port, const char *name, char *errbuf);

PCAP_AVAILABLE_1_9_REMOTE
PCAP_API int    pcap_parsesrcstr(const char *source, int *type, char *host,
           char *port, char *name, char *errbuf);

/*
* This routine can scan a directory for savefiles, list local capture
* devices, or list capture devices on a remote machine running an RPCAP
* server.
*
* For scanning for savefiles, it can be used on both UN*X systems and
* Windows systems; for each directory entry it sees, it tries to open
* the file as a savefile using pcap_open_offline(), and only includes
* it in the list of files if the open succeeds, so it filters out
* files for which the user doesn't have read permission, as well as
* files that aren't valid savefiles readable by libpcap.
*
* For listing local capture devices, it's just a wrapper around
* pcap_findalldevs(); code using pcap_findalldevs() will work on more
* platforms than code using pcap_findalldevs_ex().
*
* For listing remote capture devices, pcap_findalldevs_ex() is currently
* the only API available.
*/
PCAP_AVAILABLE_1_9_REMOTE
PCAP_API int    pcap_findalldevs_ex(const char *source,
           struct pcap_rmtauth *auth, pcap_if_t **alldevs, char *errbuf);

/*
* Sampling methods.
*
* These allow pcap_loop(), pcap_dispatch(), pcap_next(), and pcap_next_ex()
* to see only a sample of packets, rather than all packets.
*
* Currently, they work only on Windows local captures.
*/

/*
* Specifies that no sampling is to be done on the current capture.
*
* In this case, no sampling algorithms are applied to the current capture.
*/
#define PCAP_SAMP_NOSAMP        0

/*
* Specifies that only 1 out of N packets must be returned to the user.
*
* In this case, the 'value' field of the 'pcap_samp' structure indicates the
* number of packets (minus 1) that must be discarded before one packet got
* accepted.
* In other words, if 'value = 10', the first packet is returned to the
* caller, while the following 9 are discarded.
*/
#define PCAP_SAMP_1_EVERY_N     1

/*
* Specifies that we have to return 1 packet every N milliseconds.
*
* In this case, the 'value' field of the 'pcap_samp' structure indicates
* the 'waiting time' in milliseconds before one packet got accepted.
* In other words, if 'value = 10', the first packet is returned to the
* caller; the next returned one will be the first packet that arrives
* when 10ms have elapsed.
*/
#define PCAP_SAMP_FIRST_AFTER_N_MS 2

/*
* This structure defines the information related to sampling.
*
* In case the sampling is requested, the capturing device should read
* only a subset of the packets coming from the source. The returned packets
* depend on the sampling parameters.
*
* WARNING: The sampling process is applied *after* the filtering process.
* In other words, packets are filtered first, then the sampling process
* selects a subset of the 'filtered' packets and it returns them to the
* caller.
*/
struct pcap_samp
{
       /*
        * Method used for sampling; see above.
        */
       int method;

       /*
        * This value depends on the sampling method defined.
        * For its meaning, see above.
        */
       int value;
};

/*
* New functions.
*/
PCAP_AVAILABLE_1_9_REMOTE
PCAP_API struct pcap_samp *pcap_setsampling(pcap_t *p);

/*
* RPCAP active mode.
*/

/* Maximum length of an host name (needed for the RPCAP active mode) */
#define RPCAP_HOSTLIST_SIZE 1024

PCAP_AVAILABLE_1_9_REMOTE
PCAP_API PCAP_SOCKET    pcap_remoteact_accept(const char *address, const char *port,
           const char *hostlist, char *connectinghost,
           struct pcap_rmtauth *auth, char *errbuf);

PCAP_AVAILABLE_1_10_REMOTE
PCAP_API PCAP_SOCKET    pcap_remoteact_accept_ex(const char *address, const char *port,
           const char *hostlist, char *connectinghost,
           struct pcap_rmtauth *auth, int uses_ssl, char *errbuf);

PCAP_AVAILABLE_1_9_REMOTE
PCAP_API int    pcap_remoteact_list(char *hostlist, char sep, int size,
           char *errbuf);

PCAP_AVAILABLE_1_9_REMOTE
PCAP_API int    pcap_remoteact_close(const char *host, char *errbuf);

PCAP_AVAILABLE_1_9_REMOTE
PCAP_API void   pcap_remoteact_cleanup(void);

#ifdef __cplusplus
}
#endif

#endif /* lib_pcap_pcap_h */