[obnox/wireshark/wip.git] / wiretap / wtap.h

/* wtap.h
 *
 * $Id$
 *
 * Wiretap Library
 * Copyright (c) 1998 by Gilbert Ramirez <gram@alumni.rice.edu>
 *
 * This program 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 2
 * of the License, or (at your option) any later version.
 *
 * This program 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 this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */

#ifndef __WTAP_H__
#define __WTAP_H__

#ifdef HAVE_SYS_TIME_H
#include <sys/time.h>
#endif

#include <glib.h>
#include <time.h>

#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */

/* Encapsulation types. Choose names that truly reflect
 * what is contained in the packet trace file.
 *
 * WTAP_ENCAP_PER_PACKET is a value passed to "wtap_dump_open()" or
 * "wtap_dump_fd_open()" to indicate that there is no single encapsulation
 * type for all packets in the file; this may cause those routines to
 * fail if the capture file format being written can't support that.
 * It's also returned by "wtap_file_encap()" for capture files that
 * don't have a single encapsulation type for all packets in the file.
 *
 * WTAP_ENCAP_UNKNOWN is returned by "wtap_pcap_encap_to_wtap_encap()"
 * if it's handed an unknown encapsulation.
 *
 * WTAP_ENCAP_FDDI_BITSWAPPED is for FDDI captures on systems where the
 * MAC addresses you get from the hardware are bit-swapped.  Ideally,
 * the driver would tell us that, but I know of none that do, so, for
 * now, we base it on the machine on which we're *reading* the
 * capture, rather than on the machine on which the capture was taken
 * (they're probably likely to be the same).  We assume that they're
 * bit-swapped on everything except for systems running Ultrix, Alpha
 * systems, and BSD/OS systems (that's what "tcpdump" does; I guess
 * Digital decided to bit-swap addresses in the hardware or in the
 * driver, and I guess BSDI bit-swapped them in the driver, given that
 * BSD/OS generally runs on Boring Old PC's).  If we create a wiretap
 * save file format, we'd use the WTAP_ENCAP values to flag the
 * encapsulation of a packet, so there we'd at least be able to base
 * it on the machine on which the capture was taken.
 *
 * WTAP_ENCAP_LINUX_ATM_CLIP is the encapsulation you get with the
 * ATM on Linux code from <http://linux-atm.sourceforge.net/>;
 * that code adds a DLT_ATM_CLIP DLT_ code of 19, and that
 * encapsulation isn't the same as the DLT_ATM_RFC1483 encapsulation
 * presumably used on some BSD systems, which we turn into
 * WTAP_ENCAP_ATM_RFC1483.
 *
 * WTAP_ENCAP_NULL corresponds to DLT_NULL from "libpcap".  This
 * corresponds to
 *
 *      1) PPP-over-HDLC encapsulation, at least with some versions
 *         of ISDN4BSD (but not the current ones, it appears, unless
 *         I've missed something);
 *
 *      2) a 4-byte header containing the AF_ address family, in
 *         the byte order of the machine that saved the capture,
 *         for the packet, as used on many BSD systems for the
 *         loopback device and some other devices, or a 4-byte header
 *         containing the AF_ address family in network byte order,
 *         as used on recent OpenBSD systems for the loopback device;
 *
 *      3) a 4-byte header containing 2 octets of 0 and an Ethernet
 *         type in the byte order from an Ethernet header, that being
 *         what older versions of "libpcap" on Linux turn the Ethernet
 *         header for loopback interfaces into (0.6.0 and later versions
 *         leave the Ethernet header alone and make it DLT_EN10MB). */
#define WTAP_ENCAP_PER_PACKET                   -1
#define WTAP_ENCAP_UNKNOWN                      0
#define WTAP_ENCAP_ETHERNET                     1
#define WTAP_ENCAP_TOKEN_RING                   2
#define WTAP_ENCAP_SLIP                         3
#define WTAP_ENCAP_PPP                          4
#define WTAP_ENCAP_FDDI                         5
#define WTAP_ENCAP_FDDI_BITSWAPPED              6
#define WTAP_ENCAP_RAW_IP                       7
#define WTAP_ENCAP_ARCNET                       8
#define WTAP_ENCAP_ARCNET_LINUX                 9
#define WTAP_ENCAP_ATM_RFC1483                  10
#define WTAP_ENCAP_LINUX_ATM_CLIP               11
#define WTAP_ENCAP_LAPB                         12
#define WTAP_ENCAP_ATM_PDUS                     13
#define WTAP_ENCAP_ATM_PDUS_UNTRUNCATED         14
#define WTAP_ENCAP_NULL                         15
#define WTAP_ENCAP_ASCEND                       16
#define WTAP_ENCAP_ISDN                         17
#define WTAP_ENCAP_IP_OVER_FC                   18
#define WTAP_ENCAP_PPP_WITH_PHDR                19
#define WTAP_ENCAP_IEEE_802_11                  20
#define WTAP_ENCAP_PRISM_HEADER                 21
#define WTAP_ENCAP_IEEE_802_11_WITH_RADIO       22
#define WTAP_ENCAP_IEEE_802_11_WLAN_RADIOTAP    23
#define WTAP_ENCAP_IEEE_802_11_WLAN_AVS         24
#define WTAP_ENCAP_SLL                          25
#define WTAP_ENCAP_FRELAY                       26
#define WTAP_ENCAP_FRELAY_WITH_PHDR             27
#define WTAP_ENCAP_CHDLC                        28
#define WTAP_ENCAP_CISCO_IOS                    29
#define WTAP_ENCAP_LOCALTALK                    30
#define WTAP_ENCAP_OLD_PFLOG                    31
#define WTAP_ENCAP_HHDLC                        32
#define WTAP_ENCAP_DOCSIS                       33
#define WTAP_ENCAP_COSINE                       34
#define WTAP_ENCAP_WFLEET_HDLC                  35
#define WTAP_ENCAP_SDLC                         36
#define WTAP_ENCAP_TZSP                         37
#define WTAP_ENCAP_ENC                          38
#define WTAP_ENCAP_PFLOG                        39
#define WTAP_ENCAP_CHDLC_WITH_PHDR              40
#define WTAP_ENCAP_BLUETOOTH_H4                 41
#define WTAP_ENCAP_MTP2                         42
#define WTAP_ENCAP_MTP3                         43
#define WTAP_ENCAP_IRDA                         44
#define WTAP_ENCAP_USER0                        45
#define WTAP_ENCAP_USER1                        46
#define WTAP_ENCAP_USER2                        47
#define WTAP_ENCAP_USER3                        48
#define WTAP_ENCAP_USER4                        49
#define WTAP_ENCAP_USER5                        50
#define WTAP_ENCAP_USER6                        51
#define WTAP_ENCAP_USER7                        52
#define WTAP_ENCAP_USER8                        53
#define WTAP_ENCAP_USER9                        54
#define WTAP_ENCAP_USER10                       55
#define WTAP_ENCAP_USER11                       56
#define WTAP_ENCAP_USER12                       57
#define WTAP_ENCAP_USER13                       58
#define WTAP_ENCAP_USER14                       59
#define WTAP_ENCAP_USER15                       60
#define WTAP_ENCAP_SYMANTEC                     61
#define WTAP_ENCAP_APPLE_IP_OVER_IEEE1394       62
#define WTAP_ENCAP_BACNET_MS_TP                 63
#define WTAP_ENCAP_NETTL_RAW_ICMP               64
#define WTAP_ENCAP_NETTL_RAW_ICMPV6             65
#define WTAP_ENCAP_GPRS_LLC                     66
#define WTAP_ENCAP_JUNIPER_ATM1                 67
#define WTAP_ENCAP_JUNIPER_ATM2                 68
#define WTAP_ENCAP_REDBACK                      69
#define WTAP_ENCAP_NETTL_RAW_IP                 70
#define WTAP_ENCAP_NETTL_ETHERNET               71
#define WTAP_ENCAP_NETTL_TOKEN_RING             72
#define WTAP_ENCAP_NETTL_FDDI                   73
#define WTAP_ENCAP_NETTL_UNKNOWN                74
#define WTAP_ENCAP_MTP2_WITH_PHDR               75
#define WTAP_ENCAP_JUNIPER_PPPOE                76
#define WTAP_ENCAP_GCOM_TIE1                    77
#define WTAP_ENCAP_GCOM_SERIAL                  78
#define WTAP_ENCAP_NETTL_X25                    79
#define WTAP_ENCAP_K12                          80
#define WTAP_ENCAP_JUNIPER_MLPPP                81
#define WTAP_ENCAP_JUNIPER_MLFR                 82
#define WTAP_ENCAP_JUNIPER_ETHER                83
#define WTAP_ENCAP_JUNIPER_PPP                  84
#define WTAP_ENCAP_JUNIPER_FRELAY               85
#define WTAP_ENCAP_JUNIPER_CHDLC                86
#define WTAP_ENCAP_JUNIPER_GGSN                 87
#define WTAP_ENCAP_LINUX_LAPD                   88
#define WTAP_ENCAP_CATAPULT_DCT2000             89
#define WTAP_ENCAP_BER                          90
#define WTAP_ENCAP_JUNIPER_VP                   91
#define WTAP_ENCAP_USB                          92
#define WTAP_ENCAP_IEEE802_16_MAC_CPS           93
#define WTAP_ENCAP_NETTL_RAW_TELNET             94
#define WTAP_ENCAP_USB_LINUX                    95
#define WTAP_ENCAP_MPEG                         96
#define WTAP_ENCAP_PPI                          97
#define WTAP_ENCAP_ERF                          98
#define WTAP_ENCAP_BLUETOOTH_H4_WITH_PHDR       99
#define WTAP_ENCAP_SITA                         100
#define WTAP_ENCAP_SCCP                         101
#define WTAP_ENCAP_BLUETOOTH_HCI                102 /*raw packets without a transport layer header e.g. H4*/
#define WTAP_ENCAP_IPMB                         103
#define WTAP_ENCAP_IEEE802_15_4                 104
#define WTAP_ENCAP_X2E_XORAYA                   105
#define WTAP_ENCAP_FLEXRAY                      106
#define WTAP_ENCAP_LIN                          107
#define WTAP_ENCAP_MOST                         108
#define WTAP_ENCAP_CAN20B                       109
#define WTAP_ENCAP_LAYER1_EVENT                 110
#define WTAP_ENCAP_X2E_SERIAL                   111
#define WTAP_ENCAP_I2C                          112
#define WTAP_ENCAP_IEEE802_15_4_NONASK_PHY      113
#define WTAP_ENCAP_TNEF                         114
#define WTAP_ENCAP_USB_LINUX_MMAPPED            115
#define WTAP_ENCAP_GSM_UM                       116
#define WTAP_ENCAP_DPNSS                        117
#define WTAP_ENCAP_PACKETLOGGER                 118
#define WTAP_ENCAP_NSTRACE_1_0                  119
#define WTAP_ENCAP_NSTRACE_2_0                  120
#define WTAP_ENCAP_FIBRE_CHANNEL_FC2            121
#define WTAP_ENCAP_FIBRE_CHANNEL_FC2_WITH_FRAME_DELIMS 122
#define WTAP_ENCAP_JPEG_JFIF                    123     /* obsoleted by WTAP_ENCAP_MIME*/
#define WTAP_ENCAP_IPNET                        124
#define WTAP_ENCAP_SOCKETCAN                    125
#define WTAP_ENCAP_IEEE802_11_NETMON_RADIO      126
#define WTAP_ENCAP_IEEE802_15_4_NOFCS           127
#define WTAP_ENCAP_RAW_IPFIX                    128
#define WTAP_ENCAP_RAW_IP4                      129
#define WTAP_ENCAP_RAW_IP6                      130
#define WTAP_ENCAP_LAPD                         131
#define WTAP_ENCAP_DVBCI                        132
#define WTAP_ENCAP_MUX27010                     133
#define WTAP_ENCAP_MIME                         134
#define WTAP_ENCAP_NETANALYZER                  135
#define WTAP_ENCAP_NETANALYZER_TRANSPARENT      136
#define WTAP_ENCAP_IP_OVER_IB                   137
#define WTAP_ENCAP_MPEG_2_TS                    138

#define WTAP_NUM_ENCAP_TYPES                    wtap_get_num_encap_types()

/* File types that can be read by wiretap.
   We support writing some many of these file types, too, so we
   distinguish between different versions of them. */
#define WTAP_FILE_UNKNOWN                       0
#define WTAP_FILE_PCAP                          1
#define WTAP_FILE_PCAPNG                        2
#define WTAP_FILE_PCAP_NSEC                     3
#define WTAP_FILE_PCAP_AIX                      4
#define WTAP_FILE_PCAP_SS991029                 5
#define WTAP_FILE_PCAP_NOKIA                    6
#define WTAP_FILE_PCAP_SS990417                 7
#define WTAP_FILE_PCAP_SS990915                 8
#define WTAP_FILE_5VIEWS                        9
#define WTAP_FILE_IPTRACE_1_0                   10
#define WTAP_FILE_IPTRACE_2_0                   11
#define WTAP_FILE_BER                           12
#define WTAP_FILE_HCIDUMP                       13
#define WTAP_FILE_CATAPULT_DCT2000              14
#define WTAP_FILE_NETXRAY_OLD                   15
#define WTAP_FILE_NETXRAY_1_0                   16
#define WTAP_FILE_COSINE                        17
#define WTAP_FILE_CSIDS                         18
#define WTAP_FILE_DBS_ETHERWATCH                19
#define WTAP_FILE_ERF                           20
#define WTAP_FILE_EYESDN                        21
#define WTAP_FILE_NETTL                         22
#define WTAP_FILE_ISERIES                       23
#define WTAP_FILE_ISERIES_UNICODE               24
#define WTAP_FILE_I4BTRACE                      25
#define WTAP_FILE_ASCEND                        26
#define WTAP_FILE_NETMON_1_x                    27
#define WTAP_FILE_NETMON_2_x                    28
#define WTAP_FILE_NGSNIFFER_UNCOMPRESSED        29
#define WTAP_FILE_NGSNIFFER_COMPRESSED          30
#define WTAP_FILE_NETXRAY_1_1                   31
#define WTAP_FILE_NETXRAY_2_00x                 32
#define WTAP_FILE_NETWORK_INSTRUMENTS           33
#define WTAP_FILE_LANALYZER                     34
#define WTAP_FILE_PPPDUMP                       35
#define WTAP_FILE_RADCOM                        36
#define WTAP_FILE_SNOOP                         37
#define WTAP_FILE_SHOMITI                       38
#define WTAP_FILE_VMS                           39
#define WTAP_FILE_K12                           40
#define WTAP_FILE_TOSHIBA                       41
#define WTAP_FILE_VISUAL_NETWORKS               42
#define WTAP_FILE_ETHERPEEK_V56                 43
#define WTAP_FILE_ETHERPEEK_V7                  44
#define WTAP_FILE_AIROPEEK_V9                   45
#define WTAP_FILE_MPEG                          46
#define WTAP_FILE_K12TEXT                       47
#define WTAP_FILE_NETSCREEN                     48
#define WTAP_FILE_COMMVIEW                      49
#define WTAP_FILE_BTSNOOP                       50
#define WTAP_FILE_TNEF                          51
#define WTAP_FILE_DCT3TRACE                     52
#define WTAP_FILE_PACKETLOGGER                  53
#define WTAP_FILE_DAINTREE_SNA                  54
#define WTAP_FILE_NETSCALER_1_0                 55
#define WTAP_FILE_NETSCALER_2_0                 56
#define WTAP_FILE_JPEG_JFIF                     57 /* obsoleted by WTAP_FILE_MIME */
#define WTAP_FILE_IPFIX                         58
#define WTAP_FILE_MIME                          59
#define WTAP_FILE_AETHRA                        60

#define WTAP_NUM_FILE_TYPES                     wtap_get_num_file_types()

/* timestamp precision (currently only these values are supported) */
#define WTAP_FILE_TSPREC_SEC            0
#define WTAP_FILE_TSPREC_DSEC           1
#define WTAP_FILE_TSPREC_CSEC           2
#define WTAP_FILE_TSPREC_MSEC           3
#define WTAP_FILE_TSPREC_USEC           6
#define WTAP_FILE_TSPREC_NSEC           9

/*
 * Maximum packet size we'll support.
 * 65535 is the largest snapshot length that libpcap supports, so we
 * use that.
 */
#define WTAP_MAX_PACKET_SIZE                    65535

/*
 * "Pseudo-headers" are used to supply to the clients of wiretap
 * per-packet information that's not part of the packet payload
 * proper.
 *
 * NOTE: do not use pseudo-header structures to hold information
 * used by the code to read a particular capture file type; to
 * keep that sort of state information, add a new structure for
 * that private information to "wtap-int.h", add a pointer to that
 * type of structure to the "capture" member of the "struct wtap"
 * structure, and allocate one of those structures and set that member
 * in the "open" routine for that capture file type if the open
 * succeeds.  See various other capture file type handlers for examples
 * of that.
 */


struct nstr_phdr {
        gint64 rec_offset;
        gint32 rec_len;
        guint8 nicno_offset;
        guint8 nicno_len;
        guint8 dir_offset;
        guint8 dir_len;
        guint8 eth_offset;
        guint8 pcb_offset;
        guint8 l_pcb_offset;
        guint8 rec_type;
        guint8 vlantag_offset;
        guint8 coreid_offset;
};

/* Packet "pseudo-header" information for Ethernet capture files. */
struct eth_phdr {
        gint    fcs_len;        /* Number of bytes of FCS - -1 means "unknown" */
};

/* Packet "pseudo-header" information for X.25 capture files. */
#define FROM_DCE                        0x80
struct x25_phdr {
        guint8  flags; /* ENCAP_LAPB, ENCAP_V120 : 1st bit means From DCE */
};

/* Packet "pseudo-header" information for ISDN capture files. */

/* Direction */
struct isdn_phdr {
        gboolean uton;
        guint8  channel;                /* 0 = D-channel; n = B-channel n */
};

/* Packet "pseudo-header" for ATM capture files.
   Not all of this information is supplied by all capture types. */

/*
 * Status bits.
 */
#define ATM_RAW_CELL    0x01    /* TRUE if the packet is a single cell */
#define ATM_NO_HEC      0x02    /* TRUE if the cell has HEC stripped out */
#define ATM_AAL2_NOPHDR 0x04    /* TRUE if the AAL2 PDU has no pseudo-header */

/*
 * AAL types.
 */
#define AAL_UNKNOWN     0       /* AAL unknown */
#define AAL_1           1       /* AAL1 */
#define AAL_2           2       /* AAL2 */
#define AAL_3_4         3       /* AAL3/4 */
#define AAL_5           4       /* AAL5 */
#define AAL_USER        5       /* User AAL */
#define AAL_SIGNALLING  6       /* Signaling AAL */
#define AAL_OAMCELL     7       /* OAM cell */

/*
 * Traffic types.
 */
#define TRAF_UNKNOWN    0       /* Unknown */
#define TRAF_LLCMX      1       /* LLC multiplexed (RFC 1483) */
#define TRAF_VCMX       2       /* VC multiplexed (RFC 1483) */
#define TRAF_LANE       3       /* LAN Emulation */
#define TRAF_ILMI       4       /* ILMI */
#define TRAF_FR         5       /* Frame Relay */
#define TRAF_SPANS      6       /* FORE SPANS */
#define TRAF_IPSILON    7       /* Ipsilon */
#define TRAF_UMTS_FP    8       /* UMTS Frame Protocol */
#define TRAF_GPRS_NS    9 /* GPRS Network Services */
#define TRAF_SSCOP              10      /* SSCOP */

/*
 * Traffic subtypes.
 */
#define TRAF_ST_UNKNOWN         0       /* Unknown */

/*
 * For TRAF_VCMX:
 */
#define TRAF_ST_VCMX_802_3_FCS  1       /* 802.3 with an FCS */
#define TRAF_ST_VCMX_802_4_FCS  2       /* 802.4 with an FCS */
#define TRAF_ST_VCMX_802_5_FCS  3       /* 802.5 with an FCS */
#define TRAF_ST_VCMX_FDDI_FCS   4       /* FDDI with an FCS */
#define TRAF_ST_VCMX_802_6_FCS  5       /* 802.6 with an FCS */
#define TRAF_ST_VCMX_802_3      7       /* 802.3 without an FCS */
#define TRAF_ST_VCMX_802_4      8       /* 802.4 without an FCS */
#define TRAF_ST_VCMX_802_5      9       /* 802.5 without an FCS */
#define TRAF_ST_VCMX_FDDI       10      /* FDDI without an FCS */
#define TRAF_ST_VCMX_802_6      11      /* 802.6 without an FCS */
#define TRAF_ST_VCMX_FRAGMENTS  12      /* Fragments */
#define TRAF_ST_VCMX_BPDU       13      /* BPDU */

/*
 * For TRAF_LANE:
 */
#define TRAF_ST_LANE_LE_CTRL    1       /* LANE: LE Ctrl */
#define TRAF_ST_LANE_802_3      2       /* LANE: 802.3 */
#define TRAF_ST_LANE_802_5      3       /* LANE: 802.5 */
#define TRAF_ST_LANE_802_3_MC   4       /* LANE: 802.3 multicast */
#define TRAF_ST_LANE_802_5_MC   5       /* LANE: 802.5 multicast */

/*
 * For TRAF_IPSILON:
 */
#define TRAF_ST_IPSILON_FT0     1       /* Ipsilon: Flow Type 0 */
#define TRAF_ST_IPSILON_FT1     2       /* Ipsilon: Flow Type 1 */
#define TRAF_ST_IPSILON_FT2     3       /* Ipsilon: Flow Type 2 */

struct atm_phdr {
        guint32 flags;          /* status flags */
        guint8  aal;            /* AAL of the traffic */
        guint8  type;           /* traffic type */
        guint8  subtype;        /* traffic subtype */
        guint16 vpi;            /* virtual path identifier */
        guint16 vci;            /* virtual circuit identifier */
        guint8  aal2_cid;       /* channel id */
        guint16 channel;        /* link: 0 for DTE->DCE, 1 for DCE->DTE */
        guint16 cells;          /* number of cells */
        guint16 aal5t_u2u;      /* user-to-user indicator */
        guint16 aal5t_len;      /* length of the packet */
        guint32 aal5t_chksum;   /* checksum for AAL5 packet */
};

/* Packet "pseudo-header" for the output from "wandsession", "wannext",
   "wandisplay", and similar commands on Lucent/Ascend access equipment. */

#define ASCEND_MAX_STR_LEN 64

#define ASCEND_PFX_WDS_X 1
#define ASCEND_PFX_WDS_R 2
#define ASCEND_PFX_WDD   3
#define ASCEND_PFX_ISDN_X 4
#define ASCEND_PFX_ISDN_R 5
#define ASCEND_PFX_ETHER 6

struct ascend_phdr {
        guint16 type;                   /* ASCEND_PFX_*, as defined above */
        char    user[ASCEND_MAX_STR_LEN];   /* Username, from wandsession header */
        guint32 sess;                   /* Session number, from wandsession header */
        char    call_num[ASCEND_MAX_STR_LEN];   /* Called number, from WDD header */
        guint32 chunk;                  /* Chunk number, from WDD header */
        guint32 task;                   /* Task number */
};

/* Also defined in epan/packet_info.h */
#define P2P_DIR_UNKNOWN -1
#define P2P_DIR_SENT    0
#define P2P_DIR_RECV    1

/* Packet "pseudo-header" for point-to-point links with direction flags. */
struct p2p_phdr {
        int     sent; /* TRUE=sent, FALSE=received, -1=unknown*/
};

/*
 * Packet "pseudo-header" information for 802.11.
 * Radio information is only present for WTAP_ENCAP_IEEE_802_11_WITH_RADIO.
 *
 * Signal strength, etc. information:
 *
 * Raw signal strength can be measured in milliwatts.
 * It can also be represented as dBm, which is 10 times the log base 10
 * of the signal strength in mW.
 *
 * The Receive Signal Strength Indicator is an integer in the range 0 to 255.
 * The actual RSSI value for a given signal strength is dependent on the
 * vendor (and perhaps on the adapter).  The maximum possible RSSI value
 * is also dependent on the vendor and perhaps the adapter.
 *
 * The signal strength can be represented as a percentage, which is 100
 * times the ratio of the RSSI and the maximum RSSI.
 */
struct ieee_802_11_phdr {
        gint    fcs_len;        /* Number of bytes of FCS - -1 means "unknown" */
        guint8  channel;        /* Channel number */
        guint8  data_rate;      /* in .5 Mb/s units */
        guint8  signal_level;   /* percentage */
};

/* Packet "pseudo-header" for the output from CoSine L2 debug output. */

#define COSINE_MAX_IF_NAME_LEN  128

#define COSINE_ENCAP_TEST       1
#define COSINE_ENCAP_PPoATM     2
#define COSINE_ENCAP_PPoFR      3
#define COSINE_ENCAP_ATM        4
#define COSINE_ENCAP_FR         5
#define COSINE_ENCAP_HDLC       6
#define COSINE_ENCAP_PPP        7
#define COSINE_ENCAP_ETH        8
#define COSINE_ENCAP_UNKNOWN    99

#define COSINE_DIR_TX 1
#define COSINE_DIR_RX 2

struct cosine_phdr {
        guint8 encap;           /* COSINE_ENCAP_* as defined above */
        guint8 direction;       /* COSINE_DIR_*, as defined above */
        char if_name[COSINE_MAX_IF_NAME_LEN];  /* Encap & Logical I/F name */
        guint16 pro;            /* Protocol */
        guint16 off;            /* Offset */
        guint16 pri;            /* Priority */
        guint16 rm;             /* Rate Marking */
        guint16 err;            /* Error Code */
};

/* Packet "pseudo-header" for IrDA capture files. */

/*
 * Direction of the packet
 */
#define IRDA_INCOMING       0x0000
#define IRDA_OUTGOING       0x0004

/*
 * "Inline" log messages produced by IrCOMM2k on Windows
 */
#define IRDA_LOG_MESSAGE    0x0100  /* log message */
#define IRDA_MISSED_MSG     0x0101  /* missed log entry or frame */

/*
 * Differentiate between frames and log messages
 */
#define IRDA_CLASS_FRAME    0x0000
#define IRDA_CLASS_LOG      0x0100
#define IRDA_CLASS_MASK     0xFF00

struct irda_phdr {
        guint16 pkttype;    /* packet type */
};

/* Packet "pseudo-header" for nettl (HP-UX) capture files. */

struct nettl_phdr {
        guint16 subsys;
        guint32 devid;
        guint32 kind;
        gint32  pid;
        guint16 uid;
};

/* Packet "pseudo-header" for MTP2 files. */

#define MTP2_ANNEX_A_NOT_USED      0
#define MTP2_ANNEX_A_USED          1
#define MTP2_ANNEX_A_USED_UNKNOWN  2

struct mtp2_phdr {
        guint8  sent;
        guint8  annex_a_used;
        guint16 link_number;
};

/* Packet "pseudo-header" for K12 files. */

typedef union {
        struct {
                guint16 vp;
                guint16 vc;
                guint16 cid;
        } atm;

        guint32 ds0mask;
} k12_input_info_t;

struct k12_phdr {
        guint32 input;
        const gchar* input_name;
        const gchar* stack_file;
        guint32 input_type;
        k12_input_info_t input_info;
        guint8* extra_info;
        guint32 extra_length;
        void* stuff;
};

#define K12_PORT_DS0S      0x00010008
#define K12_PORT_DS1       0x00100008
#define K12_PORT_ATMPVC    0x01020000

struct lapd_phdr {
        guint16 pkttype;    /* packet type */
        guint8 we_network;
};

struct wtap;
struct catapult_dct2000_phdr
{
        union
        {
                struct isdn_phdr  isdn;
                struct atm_phdr   atm;
                struct p2p_phdr   p2p;
        } inner_pseudo_header;
        gint64 seek_off;
        struct wtap *wth;
};

#define LIBPCAP_BT_PHDR_SENT    0
#define LIBPCAP_BT_PHDR_RECV    1

/*
 * Header prepended by libpcap to each bluetooth hci h:4 frame.
 * Values in network byte order
 */
struct libpcap_bt_phdr {
    guint32 direction;     /* Bit 0 hold the frame direction. */
};

#define LIBPCAP_PPP_PHDR_RECV    0
#define LIBPCAP_PPP_PHDR_SENT    1

/*
 * Header prepended by libpcap to each ppp frame.
 */
struct libpcap_ppp_phdr {
    guint8 direction;
};

/*
 * Endace Record Format pseudo header
 */
struct erf_phdr {
  guint64 ts;             /* Time stamp */
  guint8 type;
  guint8 flags;
  guint16 rlen;
  guint16 lctr;
  guint16 wlen;
};

struct erf_ehdr {
  guint64 ehdr;
};

/*
 * ERF pseudo header with optional subheader
 * (Multichannel or Ethernet)
 */

#define MAX_ERF_EHDR 8

struct erf_mc_phdr {
  struct erf_phdr phdr;
  struct erf_ehdr ehdr_list[MAX_ERF_EHDR];
  union
  {
    guint16 eth_hdr;
    guint32 mc_hdr;
  } subhdr;
};

#define SITA_FRAME_DIR_TXED             (0x00)          /* values of sita_phdr.flags */
#define SITA_FRAME_DIR_RXED             (0x01)
#define SITA_FRAME_DIR                  (0x01)          /* mask */
#define SITA_ERROR_NO_BUFFER            (0x80)

#define SITA_SIG_DSR                    (0x01)          /* values of sita_phdr.signals */
#define SITA_SIG_DTR                    (0x02)
#define SITA_SIG_CTS                    (0x04)
#define SITA_SIG_RTS                    (0x08)
#define SITA_SIG_DCD                    (0x10)
#define SITA_SIG_UNDEF1                 (0x20)
#define SITA_SIG_UNDEF2                 (0x40)
#define SITA_SIG_UNDEF3                 (0x80)

#define SITA_ERROR_TX_UNDERRUN          (0x01)          /* values of sita_phdr.errors2 (if SITA_FRAME_DIR_TXED) */
#define SITA_ERROR_TX_CTS_LOST          (0x02)
#define SITA_ERROR_TX_UART_ERROR        (0x04)
#define SITA_ERROR_TX_RETX_LIMIT        (0x08)
#define SITA_ERROR_TX_UNDEF1            (0x10)
#define SITA_ERROR_TX_UNDEF2            (0x20)
#define SITA_ERROR_TX_UNDEF3            (0x40)
#define SITA_ERROR_TX_UNDEF4            (0x80)

#define SITA_ERROR_RX_FRAMING           (0x01)          /* values of sita_phdr.errors1 (if SITA_FRAME_DIR_RXED) */
#define SITA_ERROR_RX_PARITY            (0x02)
#define SITA_ERROR_RX_COLLISION         (0x04)
#define SITA_ERROR_RX_FRAME_LONG        (0x08)
#define SITA_ERROR_RX_FRAME_SHORT       (0x10)
#define SITA_ERROR_RX_UNDEF1            (0x20)
#define SITA_ERROR_RX_UNDEF2            (0x40)
#define SITA_ERROR_RX_UNDEF3            (0x80)

#define SITA_ERROR_RX_NONOCTET_ALIGNED  (0x01)  /* values of sita_phdr.errors2 (if SITA_FRAME_DIR_RXED) */
#define SITA_ERROR_RX_ABORT             (0x02)
#define SITA_ERROR_RX_CD_LOST           (0x04)
#define SITA_ERROR_RX_DPLL              (0x08)
#define SITA_ERROR_RX_OVERRUN           (0x10)
#define SITA_ERROR_RX_FRAME_LEN_VIOL    (0x20)
#define SITA_ERROR_RX_CRC               (0x40)
#define SITA_ERROR_RX_BREAK             (0x80)

#define SITA_PROTO_UNUSED               (0x00)          /* values of sita_phdr.proto */
#define SITA_PROTO_BOP_LAPB             (0x01)
#define SITA_PROTO_ETHERNET             (0x02)
#define SITA_PROTO_ASYNC_INTIO          (0x03)
#define SITA_PROTO_ASYNC_BLKIO          (0x04)
#define SITA_PROTO_ALC                  (0x05)
#define SITA_PROTO_UTS                  (0x06)
#define SITA_PROTO_PPP_HDLC             (0x07)
#define SITA_PROTO_SDLC                 (0x08)
#define SITA_PROTO_TOKENRING            (0x09)
#define SITA_PROTO_I2C                  (0x10)
#define SITA_PROTO_DPM_LINK             (0x11)
#define SITA_PROTO_BOP_FRL              (0x12)

struct sita_phdr {
   guint8  sita_flags;
   guint8  sita_signals;
   guint8  sita_errors1;
   guint8  sita_errors2;
   guint8  sita_proto;
};

/*pseudo header for Bluetooth HCI*/
struct bthci_phdr {
        gboolean sent;
        guint8 channel;
};

#define BTHCI_CHANNEL_COMMAND 1
#define BTHCI_CHANNEL_ACL     2
#define BTHCI_CHANNEL_SCO     3
#define BTHCI_CHANNEL_EVENT   4

/* pseudo header for WTAP_ENCAP_LAYER1_EVENT */
struct l1event_phdr {
        gboolean uton;
};

/* * I2C pseudo header */
struct i2c_phdr {
        guint8 is_event;
        guint8 bus;
        guint32 flags;
};

/* pseudo header for WTAP_ENCAP_GSM_UM */
struct gsm_um_phdr {
        gboolean uplink;
        guint8 channel;
        /* The following are only populated for downlink */
        guint8 bsic;
        guint16 arfcn;
        guint32 tdma_frame;
        guint8 error;
        guint16 timeshift;
};

#define GSM_UM_CHANNEL_UNKNOWN  0
#define GSM_UM_CHANNEL_BCCH     1
#define GSM_UM_CHANNEL_SDCCH    2
#define GSM_UM_CHANNEL_SACCH    3
#define GSM_UM_CHANNEL_FACCH    4
#define GSM_UM_CHANNEL_CCCH     5
#define GSM_UM_CHANNEL_RACH     6
#define GSM_UM_CHANNEL_AGCH     7
#define GSM_UM_CHANNEL_PCH      8

union wtap_pseudo_header {
        struct eth_phdr         eth;
        struct x25_phdr         x25;
        struct isdn_phdr        isdn;
        struct atm_phdr         atm;
        struct ascend_phdr      ascend;
        struct p2p_phdr         p2p;
        struct ieee_802_11_phdr ieee_802_11;
        struct cosine_phdr      cosine;
        struct irda_phdr        irda;
        struct nettl_phdr       nettl;
        struct mtp2_phdr        mtp2;
        struct k12_phdr         k12;
        struct lapd_phdr        lapd;
        struct catapult_dct2000_phdr dct2000;
        struct erf_mc_phdr      erf;
        struct sita_phdr        sita;
        struct bthci_phdr       bthci;
        struct l1event_phdr     l1event;
        struct i2c_phdr         i2c;
        struct gsm_um_phdr      gsm_um;
        struct nstr_phdr        nstr;
};

struct wtap_nstime {
        time_t  secs;
        int     nsecs;
};

struct wtap_pkthdr {
        guint32                 presence_flags; /* what stuff do we have? */
        struct wtap_nstime      ts;
        guint32                 caplen;         /* data length in the file */
        guint32                 len;            /* data length on the wire */
        int                     pkt_encap;
        /* pcapng variables */
        guint32                 interface_id;   /* identifier of the interface. */
        /* options */
        gchar                   *opt_comment;   /* NULL if not available */
        guint64                 drop_count;     /* number of packets lost (by the interface and the operating system) between this packet and the preceding one. */
        guint32                 pack_flags;     /* XXX - 0 for now (any value for "we don't have it"?) */
};

/*
 * Bits in presence_flags, indicating which of the fields we have.
 *
 * For the time stamp, we may need some more flags to indicate
 * whether the time stamp is an absolute date-and-time stamp, an
 * absolute time-only stamp (which can make relative time
 * calculations tricky, as you could in theory have two time
 * stamps separated by an unknown number of days), or a time stamp
 * relative to some unspecified time in the past (see mpeg.c).
 *
 * There is no presence flag for len - there has to be *some* length
 * value for the packet.  (The "captured length" can be missing if
 * the file format doesn't report a captured length distinct from
 * the on-the-network length because the application(s) producing those
 * files don't support slicing packets.)
 *
 * There could be a presence flag for the packet encapsulation - if it's
 * absent, use the file encapsulation - but it's not clear that's useful;
 * we currently do that in the module for the file format.
 */
#define WTAP_HAS_TS             0x00000001      /* time stamp */
#define WTAP_HAS_CAP_LEN        0x00000002      /* captured length separate from on-the-network length */
#define WTAP_HAS_INTERFACE_ID   0x00000004      /* interface ID */
#define WTAP_HAS_COMMENTS       0x00000008      /* comments */
#define WTAP_HAS_DROP_COUNT     0x00000010      /* drop count */
#define WTAP_HAS_PACK_FLAGS     0x00000020      /* packet flags */

/**
 * Holds the option strings from pcapng:s Section Header block(SHB).
 */
typedef struct wtapng_section_s {
        /* mandatory */
        guint64                         section_length;
        /* options */
        gchar                           *opt_comment;   /* NULL if not available */
        gchar                           *shb_hardware;  /* NULL if not available, UTF-8 string containing the description of the hardware used to create this section. */
        gchar                           *shb_os;                /* NULL if not available, UTF-8 string containing the name of the operating system used to create this section. */
        gchar                           *shb_user_appl; /* NULL if not available, UTF-8 string containing the name of the application used to create this section. */
} wtapng_section_t;


/** struct holding the information to build IDB:s
 *  the interface_data array holds an array of wtapng_if_descr_t
 *  one per interface.
 */
typedef struct wtapng_iface_descriptions_s {
        guint number_of_interfaces;
        GArray *interface_data;
} wtapng_iface_descriptions_t;

/* Interface Description 
 *
 * Options:
 * if_name        2  A UTF-8 string containing the name of the device used to capture data. "eth0" / "\Device\NPF_{AD1CE675-96D0-47C5-ADD0-2504B9126B68}" / ... 
 * if_description 3  A UTF-8 string containing the description of the device used to capture data. "Broadcom NetXtreme" / "First Ethernet Interface" / ... 
 * if_IPv4addr    4  Interface network address and netmask. This option can be repeated multiple times within the same Interface Description Block when multiple IPv4 addresses are assigned to the interface. 192 168 1 1 255 255 255 0 
 * if_IPv6addr    5  Interface network address and prefix length (stored in the last byte). This option can be repeated multiple times within the same Interface Description Block when multiple IPv6 addresses are assigned to the interface. 2001:0db8:85a3:08d3:1319:8a2e:0370:7344/64 is written (in hex) as "20 01 0d b8 85 a3 08 d3 13 19 8a 2e 03 70 73 44 40" 
 * if_MACaddr     6  Interface Hardware MAC address (48 bits). 00 01 02 03 04 05 
 * if_EUIaddr     7  Interface Hardware EUI address (64 bits), if available. TODO: give a good example 
 * if_speed       8  Interface speed (in bps). 100000000 for 100Mbps 
 * if_tsresol     9  Resolution of timestamps. If the Most Significant Bit is equal to zero, the remaining bits indicates the resolution of the timestamp as as a negative power of 10 (e.g. 6 means microsecond resolution, timestamps are the number of microseconds since 1/1/1970). If the Most Significant Bit is equal to one, the remaining bits indicates the resolution as as negative power of 2 (e.g. 10 means 1/1024 of second). If this option is not present, a resolution of 10^-6 is assumed (i.e. timestamps have the same resolution of the standard 'libpcap' timestamps). 6 
 * if_tzone      10  Time zone for GMT support (TODO: specify better). TODO: give a good example 
 * if_filter     11  The filter (e.g. "capture only TCP traffic") used to capture traffic. The first byte of the Option Data keeps a code of the filter used (e.g. if this is a libpcap string, or BPF bytecode, and more). More details about this format will be presented in Appendix XXX (TODO). (TODO: better use different options for different fields? e.g. if_filter_pcap, if_filter_bpf, ...) 00 "tcp port 23 and host 10.0.0.5" 
 * if_os         12  A UTF-8 string containing the name of the operating system of the machine in which this interface is installed. This can be different from the same information that can be contained by the Section Header Block (Section 3.1 (Section Header Block (mandatory))) because the capture can have been done on a remote machine. "Windows XP SP2" / "openSUSE 10.2" / ... 
 * if_fcslen     13  An integer value that specified the length of the Frame Check Sequence (in bits) for this interface. For link layers whose FCS length can change during time, the Packet Block Flags Word can be used (see Appendix A (Packet Block Flags Word)). 4 
 * if_tsoffset   14  A 64 bits integer value that specifies an offset (in seconds) that must be added to the timestamp of each packet to obtain the absolute timestamp of a packet. If the option is missing, the timestamps stored in the packet must be considered absolute timestamps. The time zone of the offset can be specified with the option if_tzone. TODO: won't a if_tsoffset_low for fractional second offsets be useful for highly syncronized capture systems? 1234 
 */
/**
 * Interface description data
 */
typedef struct wtapng_if_descr_s {
        int                                     wtap_encap;    /**< link_type translated to wtap_encap */
        guint64                         time_units_per_second;
        /* mandatory */
        guint16                         link_type;
        guint32                         snap_len;
        /* options */
        gchar                           *opt_comment;   /**< NULL if not available */
        gchar                           *if_name;               /**< NULL if not available, opt 2 A UTF-8 string containing the name of the device used to capture data. */
        gchar                           *if_description;/**< NULL if not available, opt 3 A UTF-8 string containing the description of the device used to capture data. */
        /* XXX: if_IPv4addr opt 4  Interface network address and netmask.*/
        /* XXX: if_IPv6addr opt 5  Interface network address and prefix length (stored in the last byte).*/
        /* XXX: if_MACaddr  opt 6  Interface Hardware MAC address (48 bits).*/
        /* XXX: if_EUIaddr  opt 7  Interface Hardware EUI address (64 bits)*/
        guint64                         if_speed;       /**< 0xFFFFFFFF if unknown, opt 8  Interface speed (in bps). 100000000 for 100Mbps */
        guint8                          if_tsresol;     /**< default is 6 for microsecond resolution, opt 9  Resolution of timestamps. 
                                                                         * If the Most Significant Bit is equal to zero, the remaining bits indicates the resolution of the timestamp as as a negative power of 10
                                                                         */
        /* XXX: if_tzone      10  Time zone for GMT support (TODO: specify better). */
        gchar                           *if_filter;     /**< NULL if not available, opt 11  The filter (e.g. "capture only TCP traffic") used to capture traffic.
                                                                         * The first byte of the Option Data keeps a code of the filter used (e.g. if this is a libpcap string, or BPF bytecode, and more).
                                                                         */
        gchar                           *if_os;         /**< NULL if not available, 12  A UTF-8 string containing the name of the operating system of the machine in which this interface is installed. */
        gint8                           if_fcslen;      /**< -1 if unknown or changes between packets, opt 13  An integer value that specified the length of the Frame Check Sequence (in bits) for this interface. */
        /* XXX: guint64 if_tsoffset; opt 14  A 64 bits integer value that specifies an offset (in seconds)...*/
} wtapng_if_descr_t;

struct Buffer;
struct wtap_dumper;

typedef struct wtap wtap;
typedef struct wtap_dumper wtap_dumper;

typedef struct wtap_reader *FILE_T;

struct file_type_info {
    /* the file type name */
    /* should be NULL for all "pseudo" types that are only internally used and not read/writeable */
    const char *name;

    /* the file type short name, used as a shortcut for the command line tools */
    /* should be NULL for all "pseudo" types that are only internally used and not read/writeable */
    const char *short_name;

    /* the default file extension, used to save this type */
    /* should be NULL if no default extension is known */
    const char *default_file_extension;

    /* a semicolon-separated list of additional file extensions */
    /* used for this type */
    /* should be NULL if no extensions, or no extensions other */
    /* than the default extension, are known */
    const char *additional_file_extensions;

    /* when writing this file format, is seeking required? */
    gboolean writing_must_seek;

    /* does this type support name resolution records? */
    /* should be FALSE is this file type doesn't support name resolution records */
    gboolean has_name_resolution;

    /* can this type write this encapsulation format? */
    /* should be NULL is this file type doesn't have write support */
    int (*can_write_encap)(int);

    /* the function to open the capture file for writing */
    /* should be NULL is this file type don't have write support */
    int (*dump_open)(wtap_dumper *, int *);
};


typedef int (*wtap_open_routine_t)(struct wtap*, int *, char **);


/** On failure, "wtap_open_offline()" returns NULL, and puts into the
 * "int" pointed to by its second argument:
 *
 * @param filename Name of the file to open
 * @param err a positive "errno" value if the capture file can't be opened;
 * a negative number, indicating the type of error, on other failures.
 * @param err_info for some errors, a string giving more details of
 * the error
 * @param do_random TRUE if random access to the file will be done,
 * FALSE if not
 */
struct wtap* wtap_open_offline(const char *filename, int *err,
    gchar **err_info, gboolean do_random);

/*
 * If we were compiled with zlib and we're at EOF, unset EOF so that
 * wtap_read/gzread has a chance to succeed. This is necessary if
 * we're tailing a file.
 */
void wtap_cleareof(wtap *wth);

/*
 * Set callback functions to add new hostnames. Currently pcapng-only.
 * MUST match add_ipv4_name and add_ipv6_name in addr_resolv.c.
 */
typedef void (*wtap_new_ipv4_callback_t) (const guint addr, const gchar *name);
void wtap_set_cb_new_ipv4(wtap *wth, wtap_new_ipv4_callback_t add_new_ipv4);

typedef void (*wtap_new_ipv6_callback_t) (const void *addrp, const gchar *name);
void wtap_set_cb_new_ipv6(wtap *wth, wtap_new_ipv6_callback_t add_new_ipv6);

/* Returns TRUE if read was successful. FALSE if failure. data_offset is
 * set to the offset in the file where the data for the read packet is
 * located. */
gboolean wtap_read(wtap *wth, int *err, gchar **err_info,
    gint64 *data_offset);

gboolean wtap_seek_read (wtap *wth, gint64 seek_off,
        union wtap_pseudo_header *pseudo_header, guint8 *pd, int len,
        int *err, gchar **err_info);

/*** get various information snippets about the current packet ***/
struct wtap_pkthdr *wtap_phdr(wtap *wth);
union wtap_pseudo_header *wtap_pseudoheader(wtap *wth);
guint8 *wtap_buf_ptr(wtap *wth);

/*** get various information snippets about the current file ***/

/** Return an approximation of the amount of data we've read sequentially
 * from the file so far. */
gint64 wtap_read_so_far(wtap *wth);
gint64 wtap_file_size(wtap *wth, int *err);
guint wtap_snapshot_length(wtap *wth); /* per file */
int wtap_file_type(wtap *wth);
int wtap_file_encap(wtap *wth);
int wtap_file_tsprecision(wtap *wth);
wtapng_section_t* wtap_file_get_shb_info(wtap *wth);
wtapng_iface_descriptions_t *wtap_file_get_idb_info(wtap *wth);

/*** close the current file ***/
void wtap_sequential_close(wtap *wth);
void wtap_close(wtap *wth);

/*** dump packets into a capture file ***/
gboolean wtap_dump_can_open(int filetype);
gboolean wtap_dump_can_write_encap(int filetype, int encap);
gboolean wtap_dump_can_compress(int filetype);
gboolean wtap_dump_has_name_resolution(int filetype);

wtap_dumper* wtap_dump_open(const char *filename, int filetype, int encap,
        int snaplen, gboolean compressed, int *err);

wtap_dumper* wtap_dump_open_ng(const char *filename, int filetype, int encap,
        int snaplen, gboolean compressed, wtapng_section_t *shb_hdr, wtapng_iface_descriptions_t *idb_inf, int *err);

wtap_dumper* wtap_dump_fdopen(int fd, int filetype, int encap, int snaplen,
        gboolean compressed, int *err);

gboolean wtap_dump(wtap_dumper *, const struct wtap_pkthdr *,
        const union wtap_pseudo_header *pseudo_header, const guint8 *, int *err);
void wtap_dump_flush(wtap_dumper *);
gint64 wtap_get_bytes_dumped(wtap_dumper *);
void wtap_set_bytes_dumped(wtap_dumper *wdh, gint64 bytes_dumped);
struct addrinfo;
gboolean wtap_dump_set_addrinfo_list(wtap_dumper *wdh, struct addrinfo *addrinfo_list);
gboolean wtap_dump_close(wtap_dumper *, int *);

/*
 * Get a GArray of WTAP_FILE_ values for file types that can be used
 * to save a file of a given type with a given WTAP_ENCAP_ type.
 */
GArray *wtap_get_savable_file_types(int file_type, int file_encap);

/*** various string converter functions ***/
const char *wtap_file_type_string(int filetype);
const char *wtap_file_type_short_string(int filetype);
int wtap_short_string_to_file_type(const char *short_name);

/*** various file extension functions ***/
const char *wtap_default_file_extension(int filetype);
GSList *wtap_get_file_extensions_list(int filetype);
void wtap_free_file_extensions_list(GSList *extensions);

const char *wtap_encap_string(int encap);
const char *wtap_encap_short_string(int encap);
int wtap_short_string_to_encap(const char *short_name);

const char *wtap_strerror(int err);

/*** get available number of file types and encapsulations ***/
int wtap_get_num_encap_types(void);
int wtap_get_num_file_types(void);

/*** dynamically register new file types and encapsulations ***/
void wtap_register_open_routine(wtap_open_routine_t, gboolean has_magic);
int wtap_register_file_type(const struct file_type_info* fi);
int wtap_register_encap_type(char* name, char* short_name);


/*
 * Wiretap error codes.
 */
#define WTAP_ERR_NOT_REGULAR_FILE               -1
        /* The file being opened for reading isn't a plain file (or pipe) */
#define WTAP_ERR_RANDOM_OPEN_PIPE               -2
        /* The file is being opened for random access and it's a pipe */
#define WTAP_ERR_FILE_UNKNOWN_FORMAT            -3
        /* The file being opened is not a capture file in a known format */
#define WTAP_ERR_UNSUPPORTED                    -4
        /* Supported file type, but there's something in the file we
           can't support */
#define WTAP_ERR_CANT_WRITE_TO_PIPE             -5
        /* Wiretap can't save to a pipe in the specified format */
#define WTAP_ERR_CANT_OPEN                      -6
        /* The file couldn't be opened, reason unknown */
#define WTAP_ERR_UNSUPPORTED_FILE_TYPE          -7
        /* Wiretap can't save files in the specified format */
#define WTAP_ERR_UNSUPPORTED_ENCAP              -8
        /* Wiretap can't read or save files in the specified format with the
           specified encapsulation */
#define WTAP_ERR_ENCAP_PER_PACKET_UNSUPPORTED   -9
        /* The specified format doesn't support per-packet encapsulations */
#define WTAP_ERR_CANT_CLOSE                     -10
        /* The file couldn't be closed, reason unknown */
#define WTAP_ERR_CANT_READ                      -11
        /* An attempt to read failed, reason unknown */
#define WTAP_ERR_SHORT_READ                     -12
        /* An attempt to read read less data than it should have */
#define WTAP_ERR_BAD_FILE                       -13
        /* The file appears to be damaged or corrupted or otherwise bogus */
#define WTAP_ERR_SHORT_WRITE                    -14
        /* An attempt to write wrote less data than it should have */
#define WTAP_ERR_UNC_TRUNCATED                  -15
        /* Sniffer compressed data was oddly truncated */
#define WTAP_ERR_UNC_OVERFLOW                   -16
        /* Uncompressing Sniffer data would overflow buffer */
#define WTAP_ERR_UNC_BAD_OFFSET                 -17
        /* LZ77 compressed data has bad offset to string */
#define WTAP_ERR_RANDOM_OPEN_STDIN              -18
        /* We're trying to open the standard input for random access */
#define WTAP_ERR_COMPRESSION_NOT_SUPPORTED      -19
        /* The filetype doesn't support output compression */
#define WTAP_ERR_CANT_SEEK                      -20
        /* An attempt to seek failed, reason unknown */
#define WTAP_ERR_DECOMPRESS                     -21
        /* Error decompressing */
#define WTAP_ERR_INTERNAL                       -22
        /* "Shouldn't happen" internal errors */

#ifdef __cplusplus
}
#endif /* __cplusplus */

#endif /* __WTAP_H__ */