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[wireshark-sm.git] / wiretap / wtap.h

/** @file
 *
 * Wiretap Library
 * Copyright (c) 1998 by Gilbert Ramirez <gram@alumni.rice.edu>
 *
 * SPDX-License-Identifier: GPL-2.0-or-later
 */

#ifndef __WTAP_H__
#define __WTAP_H__

#include <wireshark.h>
#include <time.h>
#include <wsutil/buffer.h>
#include <wsutil/nstime.h>
#include <wsutil/inet_addr.h>
#include "wtap_opttypes.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_fdopen()" 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. It is also used by file
 * types for encapsulations which are unsupported by libwiretap.
 *
 * WTAP_ENCAP_NONE is an initial value used by file types like pcapng
 * that do not have a single file level encapsulation type. If and when
 * something that indicate encapsulation is read, the encapsulation will
 * change (possibly to WTAP_ENCAP_PER_PACKET) and appropriate IDBs will
 * be generated. If a file type uses this value, it MUST provide IDBs
 * (possibly fake) when the encapsulation changes; otherwise, it should
 * return WTAP_ENCAP_UNKNOWN so that attempts to write an output file
 * without reading the entire input file first fail gracefully.
 *
 * 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_NONE                         -2
#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_IEEE_802_11_PRISM             21
#define WTAP_ENCAP_IEEE_802_11_WITH_RADIO        22
#define WTAP_ENCAP_IEEE_802_11_RADIOTAP          23
#define WTAP_ENCAP_IEEE_802_11_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_FREEBSD                   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_KONTRON                 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_LINUX                    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_IEEE_802_11_NETMON           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_SNOOP             137
#define WTAP_ENCAP_MPEG_2_TS                    138
#define WTAP_ENCAP_PPP_ETHER                    139
#define WTAP_ENCAP_NFC_LLCP                     140
#define WTAP_ENCAP_NFLOG                        141
#define WTAP_ENCAP_V5_EF                        142
#define WTAP_ENCAP_BACNET_MS_TP_WITH_PHDR       143
#define WTAP_ENCAP_IXVERIWAVE                   144
#define WTAP_ENCAP_SDH                          145
#define WTAP_ENCAP_DBUS                         146
#define WTAP_ENCAP_AX25_KISS                    147
#define WTAP_ENCAP_AX25                         148
#define WTAP_ENCAP_SCTP                         149
#define WTAP_ENCAP_INFINIBAND                   150
#define WTAP_ENCAP_JUNIPER_SVCS                 151
#define WTAP_ENCAP_USBPCAP                      152
#define WTAP_ENCAP_RTAC_SERIAL                  153
#define WTAP_ENCAP_BLUETOOTH_LE_LL              154
#define WTAP_ENCAP_WIRESHARK_UPPER_PDU          155
#define WTAP_ENCAP_STANAG_4607                  156
#define WTAP_ENCAP_STANAG_5066_D_PDU            157
#define WTAP_ENCAP_NETLINK                      158
#define WTAP_ENCAP_BLUETOOTH_LINUX_MONITOR      159
#define WTAP_ENCAP_BLUETOOTH_BREDR_BB           160
#define WTAP_ENCAP_BLUETOOTH_LE_LL_WITH_PHDR    161
#define WTAP_ENCAP_NSTRACE_3_0                  162
#define WTAP_ENCAP_LOGCAT                       163
#define WTAP_ENCAP_LOGCAT_BRIEF                 164
#define WTAP_ENCAP_LOGCAT_PROCESS               165
#define WTAP_ENCAP_LOGCAT_TAG                   166
#define WTAP_ENCAP_LOGCAT_THREAD                167
#define WTAP_ENCAP_LOGCAT_TIME                  168
#define WTAP_ENCAP_LOGCAT_THREADTIME            169
#define WTAP_ENCAP_LOGCAT_LONG                  170
#define WTAP_ENCAP_PKTAP                        171
#define WTAP_ENCAP_EPON                         172
#define WTAP_ENCAP_IPMI_TRACE                   173
#define WTAP_ENCAP_LOOP                         174
#define WTAP_ENCAP_JSON                         175
#define WTAP_ENCAP_NSTRACE_3_5                  176
#define WTAP_ENCAP_ISO14443                     177
#define WTAP_ENCAP_GFP_T                        178
#define WTAP_ENCAP_GFP_F                        179
#define WTAP_ENCAP_IP_OVER_IB_PCAP              180
#define WTAP_ENCAP_JUNIPER_VN                   181
#define WTAP_ENCAP_USB_DARWIN                   182
#define WTAP_ENCAP_LORATAP                      183
#define WTAP_ENCAP_3MB_ETHERNET                 184
#define WTAP_ENCAP_VSOCK                        185
#define WTAP_ENCAP_NORDIC_BLE                   186
#define WTAP_ENCAP_NETMON_NET_NETEVENT          187
#define WTAP_ENCAP_NETMON_HEADER                188
#define WTAP_ENCAP_NETMON_NET_FILTER            189
#define WTAP_ENCAP_NETMON_NETWORK_INFO_EX       190
#define WTAP_ENCAP_MA_WFP_CAPTURE_V4            191
#define WTAP_ENCAP_MA_WFP_CAPTURE_V6            192
#define WTAP_ENCAP_MA_WFP_CAPTURE_2V4           193
#define WTAP_ENCAP_MA_WFP_CAPTURE_2V6           194
#define WTAP_ENCAP_MA_WFP_CAPTURE_AUTH_V4       195
#define WTAP_ENCAP_MA_WFP_CAPTURE_AUTH_V6       196
#define WTAP_ENCAP_JUNIPER_ST                   197
#define WTAP_ENCAP_ETHERNET_MPACKET             198
#define WTAP_ENCAP_DOCSIS31_XRA31               199
#define WTAP_ENCAP_DPAUXMON                     200
#define WTAP_ENCAP_RUBY_MARSHAL                 201
#define WTAP_ENCAP_RFC7468                      202
#define WTAP_ENCAP_SYSTEMD_JOURNAL              203 /* Event, not a packet */
#define WTAP_ENCAP_EBHSCR                       204
#define WTAP_ENCAP_VPP                          205
#define WTAP_ENCAP_IEEE802_15_4_TAP             206
#define WTAP_ENCAP_LOG_3GPP                     207
#define WTAP_ENCAP_USB_2_0                      208
#define WTAP_ENCAP_MP4                          209
#define WTAP_ENCAP_SLL2                         210
#define WTAP_ENCAP_ZWAVE_SERIAL                 211
#define WTAP_ENCAP_ETW                          212
#define WTAP_ENCAP_ERI_ENB_LOG                  213
#define WTAP_ENCAP_ZBNCP                        214
#define WTAP_ENCAP_USB_2_0_LOW_SPEED            215
#define WTAP_ENCAP_USB_2_0_FULL_SPEED           216
#define WTAP_ENCAP_USB_2_0_HIGH_SPEED           217
#define WTAP_ENCAP_AUTOSAR_DLT                  218
#define WTAP_ENCAP_AUERSWALD_LOG                219
#define WTAP_ENCAP_ATSC_ALP                     220
#define WTAP_ENCAP_FIRA_UCI                     221
#define WTAP_ENCAP_SILABS_DEBUG_CHANNEL         222
#define WTAP_ENCAP_MDB                          223
#define WTAP_ENCAP_EMS                          224
#define WTAP_ENCAP_DECT_NR                      225

/* After adding new item here, please also add new item to encap_table_base array */

#define WTAP_NUM_ENCAP_TYPES                    wtap_get_num_encap_types()

/* Value to be used as a file type/subtype value if the type is unknown */
#define WTAP_FILE_TYPE_SUBTYPE_UNKNOWN                        -1

/* timestamp precision (currently only these values are supported) */
#define WTAP_TSPREC_UNKNOWN    -2
#define WTAP_TSPREC_PER_PACKET -1  /* as a per-file value, means per-packet */
/*
 * These values are the number of digits of precision after the integral part.
 * Thry're the same as WS_TSPREC values; we define them here so that
 * tools/make-enums.py sees them.
 */
#define WTAP_TSPREC_SEC         0
#define WTAP_TSPREC_100_MSEC    1
#define WTAP_TSPREC_DSEC        1 /* Backwards compatibility */
#define WTAP_TSPREC_10_MSEC     2
#define WTAP_TSPREC_CSEC        2 /* Backwards compatibility */
#define WTAP_TSPREC_MSEC        3
#define WTAP_TSPREC_100_USEC    4
#define WTAP_TSPREC_10_USEC     5
#define WTAP_TSPREC_USEC        6
#define WTAP_TSPREC_100_NSEC    7
#define WTAP_TSPREC_10_NSEC     8
#define WTAP_TSPREC_NSEC        9
/* if you add to the above, update wtap_tsprec_string() */

/*
 * Maximum packet sizes.
 *
 * For most link-layer types, we use 262144, which is currently
 * libpcap's MAXIMUM_SNAPLEN.
 *
 * For WTAP_ENCAP_DBUS, the maximum is 128MiB, as per
 *
 *    https://dbus.freedesktop.org/doc/dbus-specification.html#message-protocol-messages
 *
 * For WTAP_ENCAP_EBHSCR, the maximum is 8MiB, as per
 *
 *    https://www.elektrobit.com/ebhscr
 *
 * For WTAP_ENCAP_USBPCAP, the maximum is 128MiB, as per
 *
 *    https://gitlab.com/wireshark/wireshark/-/issues/15985
 *
 * We don't want to write out files that specify a maximum packet size
 * greater than 262144 if we don't have to, as software reading those
 * files might allocate a buffer much larger than necessary, wasting memory.
 */
#define WTAP_MAX_PACKET_SIZE_STANDARD    262144U
#define WTAP_MAX_PACKET_SIZE_USBPCAP     (128U*1024U*1024U)
#define WTAP_MAX_PACKET_SIZE_EBHSCR      (32U*1024U*1024U)
#define WTAP_MAX_PACKET_SIZE_DBUS        (128U*1024U*1024U)

/*
 * "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.
 */


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

/* Packet "pseudo-header" information for capture files for traffic
   between DTE and DCE. */
#define FROM_DCE 0x80
struct dte_dce_phdr {
    uint8_t flags;   /* ENCAP_LAPB, ENCAP_V120, ENCAP_FRELAY: 1st bit means From DCE */
};

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

/* Direction */
struct isdn_phdr {
    bool uton;
    uint8_t  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.
   These originally came from the Network General (DOS-based)
   ATM Sniffer file format, but we've added some additional
   items. */

/*
 * 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 */
#define ATM_REASSEMBLY_ERROR 0x08 /* true if this is an incompletely-reassembled PDU */

/*
 * 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 {
    uint32_t flags;      /* status flags */
    uint8_t aal;        /* AAL of the traffic */
    uint8_t type;       /* traffic type */
    uint8_t subtype;    /* traffic subtype */
    uint16_t vpi;        /* virtual path identifier */
    uint16_t vci;        /* virtual circuit identifier */
    uint8_t aal2_cid;   /* channel id */
    uint16_t channel;    /* link: 0 for DTE->DCE, 1 for DCE->DTE */
    uint16_t cells;      /* number of cells */
    uint16_t aal5t_u2u;  /* user-to-user indicator */
    uint16_t aal5t_len;  /* length of the packet */
    uint32_t 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 {
    uint16_t type;                         /* ASCEND_PFX_*, as defined above */
    char    user[ASCEND_MAX_STR_LEN];     /* Username, from wandsession header */
    uint32_t sess;                         /* Session number, from wandsession header */
    char    call_num[ASCEND_MAX_STR_LEN]; /* Called number, from WDD header */
    uint32_t chunk;                        /* Chunk number, from WDD header */
    uint32_t task;                         /* Task number */
};

/* Packet "pseudo-header" for point-to-point links with direction flags. */
struct p2p_phdr {
    bool sent;
};

/*
 * Packet "pseudo-header" information for 802.11.
 * Radio information is only present in this form for
 * WTAP_ENCAP_IEEE_802_11_WITH_RADIO.  This is used for file formats in
 * which the radio information isn't provided as a pseudo-header in the
 * packet data.  It is also used by the dissectors for the pseudo-headers
 * in the packet data to supply radio information, in a form independent
 * of the file format and pseudo-header format, to the "802.11 radio"
 * dissector.
 *
 * 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.
 */

/*
 * PHY types.
 */
#define PHDR_802_11_PHY_UNKNOWN        0 /* PHY not known */
#define PHDR_802_11_PHY_11_FHSS        1 /* 802.11 FHSS */
#define PHDR_802_11_PHY_11_IR          2 /* 802.11 IR */
#define PHDR_802_11_PHY_11_DSSS        3 /* 802.11 DSSS */
#define PHDR_802_11_PHY_11B            4 /* 802.11b */
#define PHDR_802_11_PHY_11A            5 /* 802.11a */
#define PHDR_802_11_PHY_11G            6 /* 802.11g */
#define PHDR_802_11_PHY_11N            7 /* 802.11n */
#define PHDR_802_11_PHY_11AC           8 /* 802.11ac */
#define PHDR_802_11_PHY_11AD           9 /* 802.11ad */
#define PHDR_802_11_PHY_11AH          10 /* 802.11ah */
#define PHDR_802_11_PHY_11AX          11 /* 802.11ax */
#define PHDR_802_11_PHY_11BE          12 /* 802.11be - EHT */

/*
 * PHY-specific information.
 */

/*
 * 802.11 legacy FHSS.
 */
struct ieee_802_11_fhss {
    unsigned has_hop_set:1;
    unsigned has_hop_pattern:1;
    unsigned has_hop_index:1;

    uint8_t  hop_set;        /* Hop set */
    uint8_t  hop_pattern;    /* Hop pattern */
    uint8_t  hop_index;      /* Hop index */
};

/*
 * 802.11b.
 */
struct ieee_802_11b {
    /* Which of this information is present? */
    unsigned has_short_preamble:1;

    bool short_preamble; /* Short preamble */
};

/*
 * 802.11a.
 */
struct ieee_802_11a {
    /* Which of this information is present? */
    unsigned has_channel_type:1;
    unsigned has_turbo_type:1;

    unsigned channel_type:2;
    unsigned turbo_type:2;
};

/*
 * Channel type values.
 */
#define PHDR_802_11A_CHANNEL_TYPE_NORMAL           0
#define PHDR_802_11A_CHANNEL_TYPE_HALF_CLOCKED     1
#define PHDR_802_11A_CHANNEL_TYPE_QUARTER_CLOCKED  2

/*
 * "Turbo" is an Atheros proprietary extension with 40 MHz-wide channels.
 * It can be dynamic or static.
 *
 * See
 *
 *    http://wifi-insider.com/atheros/turbo.htm
 */
#define PHDR_802_11A_TURBO_TYPE_NORMAL           0
#define PHDR_802_11A_TURBO_TYPE_TURBO            1  /* If we don't know whether it's static or dynamic */
#define PHDR_802_11A_TURBO_TYPE_DYNAMIC_TURBO    2
#define PHDR_802_11A_TURBO_TYPE_STATIC_TURBO     3

/*
 * 802.11g.
 *
 * This should only be used for packets sent using OFDM; packets
 * sent on an 11g network using DSSS should have the PHY set to
 * 11b.
 */
struct ieee_802_11g {
    /* Which of this information is present? */
    unsigned has_mode:1;

    uint32_t mode;           /* Various proprietary extensions */
};

/*
 * Mode values.
 */
#define PHDR_802_11G_MODE_NORMAL    0
#define PHDR_802_11G_MODE_SUPER_G   1  /* Atheros Super G */

/*
 * 802.11n.
 */
struct ieee_802_11n {
    /* Which of this information is present? */
    unsigned has_mcs_index:1;
    unsigned has_bandwidth:1;
    unsigned has_short_gi:1;
    unsigned has_greenfield:1;
    unsigned has_fec:1;
    unsigned has_stbc_streams:1;
    unsigned has_ness:1;

    uint16_t mcs_index;      /* MCS index */
    unsigned bandwidth;      /* Bandwidth = 20 MHz, 40 MHz, etc. */
    unsigned short_gi:1;     /* True for short guard interval */
    unsigned greenfield:1;   /* True for greenfield, short for mixed */
    unsigned fec:1;          /* FEC: 0 = BCC, 1 = LDPC */
    unsigned stbc_streams:2; /* Number of STBC streams */
    unsigned ness;           /* Number of extension spatial streams */
};

/*
 * Bandwidth values; used for both 11n and 11ac.
 */
#define PHDR_802_11_BANDWIDTH_20_MHZ   0  /* 20 MHz */
#define PHDR_802_11_BANDWIDTH_40_MHZ   1  /* 40 MHz */
#define PHDR_802_11_BANDWIDTH_20_20L   2  /* 20 + 20L, 40 MHz */
#define PHDR_802_11_BANDWIDTH_20_20U   3  /* 20 + 20U, 40 MHz */
#define PHDR_802_11_BANDWIDTH_80_MHZ   4  /* 80 MHz */
#define PHDR_802_11_BANDWIDTH_40_40L   5  /* 40 + 40L MHz, 80 MHz */
#define PHDR_802_11_BANDWIDTH_40_40U   6  /* 40 + 40U MHz, 80 MHz */
#define PHDR_802_11_BANDWIDTH_20LL     7  /* ???, 80 MHz */
#define PHDR_802_11_BANDWIDTH_20LU     8  /* ???, 80 MHz */
#define PHDR_802_11_BANDWIDTH_20UL     9  /* ???, 80 MHz */
#define PHDR_802_11_BANDWIDTH_20UU     10 /* ???, 80 MHz */
#define PHDR_802_11_BANDWIDTH_160_MHZ  11 /* 160 MHz */
#define PHDR_802_11_BANDWIDTH_80_80L   12 /* 80 + 80L, 160 MHz */
#define PHDR_802_11_BANDWIDTH_80_80U   13 /* 80 + 80U, 160 MHz */
#define PHDR_802_11_BANDWIDTH_40LL     14 /* ???, 160 MHz */
#define PHDR_802_11_BANDWIDTH_40LU     15 /* ???, 160 MHz */
#define PHDR_802_11_BANDWIDTH_40UL     16 /* ???, 160 MHz */
#define PHDR_802_11_BANDWIDTH_40UU     17 /* ???, 160 MHz */
#define PHDR_802_11_BANDWIDTH_20LLL    18 /* ???, 160 MHz */
#define PHDR_802_11_BANDWIDTH_20LLU    19 /* ???, 160 MHz */
#define PHDR_802_11_BANDWIDTH_20LUL    20 /* ???, 160 MHz */
#define PHDR_802_11_BANDWIDTH_20LUU    21 /* ???, 160 MHz */
#define PHDR_802_11_BANDWIDTH_20ULL    22 /* ???, 160 MHz */
#define PHDR_802_11_BANDWIDTH_20ULU    23 /* ???, 160 MHz */
#define PHDR_802_11_BANDWIDTH_20UUL    24 /* ???, 160 MHz */
#define PHDR_802_11_BANDWIDTH_20UUU    25 /* ???, 160 MHz */

/*
 * 802.11ac.
 */
struct ieee_802_11ac {
    /* Which of this information is present? */
    unsigned has_stbc:1;
    unsigned has_txop_ps_not_allowed:1;
    unsigned has_short_gi:1;
    unsigned has_short_gi_nsym_disambig:1;
    unsigned has_ldpc_extra_ofdm_symbol:1;
    unsigned has_beamformed:1;
    unsigned has_bandwidth:1;
    unsigned has_fec:1;
    unsigned has_group_id:1;
    unsigned has_partial_aid:1;

    unsigned stbc:1;         /* 1 if all spatial streams have STBC */
    unsigned txop_ps_not_allowed:1;
    unsigned short_gi:1;     /* True for short guard interval */
    unsigned short_gi_nsym_disambig:1;
    unsigned ldpc_extra_ofdm_symbol:1;
    unsigned beamformed:1;
    uint8_t  bandwidth;      /* Bandwidth = 20 MHz, 40 MHz, etc. */
    uint8_t  mcs[4];         /* MCS index per user */
    uint8_t  nss[4];         /* NSS per user */
    uint8_t  fec;            /* Bit array of FEC per user: 0 = BCC, 1 = LDPC */
    uint8_t  group_id;
    uint16_t partial_aid;
};

/*
 * 802.11ad.
 */

/*
 * Min and Max frequencies for 802.11ad and a macro for checking for 802.11ad.
 */

#define PHDR_802_11AD_MIN_FREQUENCY    57000
#define PHDR_802_11AD_MAX_FREQUENCY    71000

#define IS_80211AD(frequency) (((frequency) >= PHDR_802_11AD_MIN_FREQUENCY) &&\
                               ((frequency) <= PHDR_802_11AD_MAX_FREQUENCY))

struct ieee_802_11ad {
    /* Which of this information is present? */
    unsigned has_mcs_index:1;

    uint8_t  mcs;            /* MCS index */
};

/*
 * 802.11ax (HE).
 */
struct ieee_802_11ax {
    /* Which of this information is present? */
    unsigned has_mcs_index:1;
    unsigned has_bwru:1;
    unsigned has_gi:1;

    uint8_t  nsts:4;         /* Number of Space-time Streams */
    uint8_t  mcs:4;          /* MCS index */
    uint8_t  bwru:4;         /* Bandwidth/RU allocation */
    uint8_t  gi:2;           /* Guard Interval */
};

union ieee_802_11_phy_info {
    struct ieee_802_11_fhss info_11_fhss;
    struct ieee_802_11b info_11b;
    struct ieee_802_11a info_11a;
    struct ieee_802_11g info_11g;
    struct ieee_802_11n info_11n;
    struct ieee_802_11ac info_11ac;
    struct ieee_802_11ad info_11ad;
    struct ieee_802_11ax info_11ax;
};

struct ieee_802_11_phdr {
    int      fcs_len;          /* Number of bytes of FCS - -1 means "unknown" */
    unsigned decrypted:1;      /* true if frame is decrypted even if "protected" bit is set */
    unsigned datapad:1;        /* true if frame has padding between 802.11 header and payload */
    unsigned no_a_msdus:1;     /* true if we should ignore the A-MSDU bit */
    unsigned phy;              /* PHY type */
    union ieee_802_11_phy_info phy_info;

    /* Which of this information is present? */
    unsigned has_channel:1;
    unsigned has_frequency:1;
    unsigned has_data_rate:1;
    unsigned has_signal_percent:1;
    unsigned has_noise_percent:1;
    unsigned has_signal_dbm:1;
    unsigned has_noise_dbm:1;
    unsigned has_signal_db:1;
    unsigned has_noise_db:1;
    unsigned has_tsf_timestamp:1;
    unsigned has_aggregate_info:1;        /* aggregate flags and ID */
    unsigned has_zero_length_psdu_type:1; /* zero-length PSDU type */

    uint16_t channel;                     /* Channel number */
    uint32_t frequency;                   /* Channel center frequency */
    uint16_t data_rate;                   /* Data rate, in .5 Mb/s units */
    uint8_t  signal_percent;              /* Signal level, as a percentage */
    uint8_t  noise_percent;               /* Noise level, as a percentage */
    int8_t   signal_dbm;                  /* Signal level, in dBm */
    int8_t   noise_dbm;                   /* Noise level, in dBm */
    uint8_t  signal_db;                   /* Signal level, in dB from an arbitrary point */
    uint8_t  noise_db;                    /* Noise level, in dB from an arbitrary point */
    uint64_t tsf_timestamp;
    uint32_t aggregate_flags;             /* A-MPDU flags */
    uint32_t aggregate_id;                /* ID for A-MPDU reassembly */
    uint8_t  zero_length_psdu_type;       /* type of zero-length PSDU */
};

/*
 * A-MPDU flags.
 */
#define PHDR_802_11_LAST_PART_OF_A_MPDU    0x00000001 /* this is the last part of an A-MPDU */
#define PHDR_802_11_A_MPDU_DELIM_CRC_ERROR 0x00000002 /* delimiter CRC error after this part */

/*
 * Zero-length PSDU types.
 */
#define PHDR_802_11_SOUNDING_PSDU                 0 /* sounding PPDU */
#define PHDR_802_11_DATA_NOT_CAPTURED             1 /* data not captured, (e.g. multi-user PPDU) */
#define PHDR_802_11_0_LENGTH_PSDU_VENDOR_SPECIFIC 0xff

/* 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 {
    uint8_t encap;      /* COSINE_ENCAP_* as defined above */
    uint8_t direction;  /* COSINE_DIR_*, as defined above */
    char    if_name[COSINE_MAX_IF_NAME_LEN];  /* Encap & Logical I/F name */
    uint16_t pro;        /* Protocol */
    uint16_t off;        /* Offset */
    uint16_t pri;        /* Priority */
    uint16_t rm;         /* Rate Marking */
    uint16_t 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 {
    uint16_t pkttype;    /* packet type */
};

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

struct nettl_phdr {
    uint16_t subsys;
    uint32_t devid;
    uint32_t kind;
    int32_t pid;
    uint32_t 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 {
    uint8_t sent;
    uint8_t annex_a_used;
    uint16_t link_number;
};

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

typedef union {
    struct {
        uint16_t vp;
        uint16_t vc;
        uint16_t cid;
    } atm;

    uint32_t ds0mask;
} k12_input_info_t;

struct k12_phdr {
    uint32_t          input;
    const char       *input_name;
    const char       *stack_file;
    uint32_t          input_type;
    k12_input_info_t  input_info;
    uint8_t          *extra_info;
    uint32_t          extra_length;
    void*             stuff;
};

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

struct lapd_phdr {
    uint16_t pkttype;    /* packet type */
    uint8_t we_network;
};

struct wtap;
struct catapult_dct2000_phdr
{
    union
    {
        struct isdn_phdr isdn;
        struct atm_phdr  atm;
        struct p2p_phdr  p2p;
    } inner_pseudo_header;
    int64_t      seek_off;
    struct wtap *wth;
};

/*
 * Endace Record Format pseudo header
 */
struct erf_phdr {
    uint64_t ts;     /* Time stamp */
    uint8_t type;
    uint8_t flags;
    uint16_t rlen;
    uint16_t lctr;
    uint16_t wlen;
};

struct erf_ehdr {
  uint64_t ehdr;
};

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

#define MAX_ERF_EHDR 16

struct wtap_erf_eth_hdr {
    uint8_t offset;
    uint8_t pad;
};

struct erf_mc_phdr {
    struct erf_phdr phdr;
    struct erf_ehdr ehdr_list[MAX_ERF_EHDR];
    union
    {
        struct wtap_erf_eth_hdr eth_hdr;
        uint32_t mc_hdr;
        uint32_t aal2_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 {
    uint8_t sita_flags;
    uint8_t sita_signals;
    uint8_t sita_errors1;
    uint8_t sita_errors2;
    uint8_t sita_proto;
};

/*pseudo header for Bluetooth HCI*/
struct bthci_phdr {
    bool      sent;
    uint32_t  channel;
};

#define BTHCI_CHANNEL_COMMAND  1
#define BTHCI_CHANNEL_ACL      2
#define BTHCI_CHANNEL_SCO      3
#define BTHCI_CHANNEL_EVENT    4
#define BTHCI_CHANNEL_ISO      5

/* pseudo header for WTAP_ENCAP_BLUETOOTH_LINUX_MONITOR */
struct btmon_phdr {
    uint16_t  adapter_id;
    uint16_t  opcode;
};

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

/* * I2C pseudo header */
struct i2c_phdr {
    uint8_t is_event;
    uint8_t bus;
    uint32_t flags;
};

/* pseudo header for WTAP_ENCAP_GSM_UM */
struct gsm_um_phdr {
    bool uplink;
    uint8_t  channel;
    /* The following are only populated for downlink */
    uint8_t  bsic;
    uint16_t arfcn;
    uint32_t tdma_frame;
    uint8_t  error;
    uint16_t 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

/* Pseudo-header for nstrace packets */
struct nstr_phdr {
    int64_t rec_offset;
    int32_t rec_len;
    uint8_t nicno_offset;
    uint8_t nicno_len;
    uint8_t dir_offset;
    uint8_t dir_len;
    uint16_t eth_offset;
    uint8_t pcb_offset;
    uint8_t l_pcb_offset;
    uint8_t rec_type;
    uint8_t vlantag_offset;
    uint8_t coreid_offset;
    uint8_t srcnodeid_offset;
    uint8_t destnodeid_offset;
    uint8_t clflags_offset;
    uint8_t src_vmname_len_offset;
    uint8_t dst_vmname_len_offset;
    uint8_t ns_activity_offset;
    uint8_t data_offset;
};

/* Packet "pseudo-header" for Nokia output */
struct nokia_phdr {
    struct eth_phdr eth;
    uint8_t stuff[4];    /* mysterious stuff */
};

#define LLCP_PHDR_FLAG_SENT 0
struct llcp_phdr {
    uint8_t adapter;
    uint8_t flags;
};

/* pseudo header for WTAP_ENCAP_LOGCAT */
struct logcat_phdr {
    int version;
};

/* Packet "pseudo-header" information for header data from NetMon files. */

struct netmon_phdr {
    uint8_t* title;          /* Comment title, as a null-terminated UTF-8 string */
    uint32_t descLength;     /* Number of bytes in the comment description */
    uint8_t* description;    /* Comment description, in ASCII RTF */
    unsigned sub_encap;        /* "Real" encap value for the record that will be used once pseudo header data is display */
    union sub_wtap_pseudo_header {
        struct eth_phdr     eth;
        struct atm_phdr     atm;
        struct ieee_802_11_phdr ieee_802_11;
    } subheader;
};

/* File "pseudo-header" for BER data files. */
struct ber_phdr {
    const char *pathname;   /* Path name of file. */
};

union wtap_pseudo_header {
    struct eth_phdr     eth;
    struct dte_dce_phdr dte_dce;
    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 btmon_phdr   btmon;
    struct l1event_phdr l1event;
    struct i2c_phdr     i2c;
    struct gsm_um_phdr  gsm_um;
    struct nstr_phdr    nstr;
    struct nokia_phdr   nokia;
    struct llcp_phdr    llcp;
    struct logcat_phdr  logcat;
    struct netmon_phdr  netmon;
    struct ber_phdr     ber;
};

/*
 * Record type values.
 *
 * This list will expand over time, so don't assume everything will
 * forever be one of the types listed below.
 *
 * For file-type-specific records, the "ftsrec" field of the pseudo-header
 * contains a file-type-specific subtype value, such as a block type for
 * a pcapng file.
 *
 * An "event" is an indication that something happened during the capture
 * process, such as a status transition of some sort on the network.
 * These should, ideally, have a time stamp and, if they're relevant to
 * a particular interface on a multi-interface capture, should also have
 * an interface ID.  The data for the event is file-type-specific and
 * subtype-specific.  These should be dissected and displayed just as
 * packets are.
 *
 * A "report" supplies information not corresponding to an event;
 * for example, a pcapng Interface Statistics Block would be a report,
 * as it doesn't correspond to something happening on the network.
 * They may have a time stamp, and should be dissected and displayed
 * just as packets are.
 *
 * We distinguish between "events" and "reports" so that, for example,
 * the packet display can show the delta between a packet and an event
 * but not show the delta between a packet and a report, as the time
 * stamp of a report may not correspond to anything interesting on
 * the network but the time stamp of an event would.
 *
 * XXX - are there any file-type-specific records that *shouldn't* be
 * dissected and displayed?  If so, they should be parsed and the
 * information in them stored somewhere, and used somewhere, whether
 * it's just used when saving the file in its native format or also
 * used to parse *other* file-type-specific records.
 *
 * These would be similar to, for example, pcapng Interface Description
 * Blocks, for which the position within the file is significant only
 * in that an IDB for an interface must appear before any packets from
 * the interface; the fact that an IDB appears at some point doesn't
 * necessarily mean something happened in the capture at that point.
 * Name Resolution Blocks are another example of such a record.
 *
 * (XXX - if you want to have a record that says "this interface first
 * showed up at this time", that needs to be a separate record type
 * from the IDB.  We *could* add a "New Interface Description Block",
 * with a time stamp, for that purpose, but we'd *still* have to
 * provide IDBs for those interfaces, for compatibility with programs
 * that don't know about the NIDB.  An ISB with only an isb_starttime
 * option would suffice for this purpose, so nothing needs to be
 * added to pcapng for this.)
 */
#define REC_TYPE_PACKET                 0    /**< packet */
#define REC_TYPE_FT_SPECIFIC_EVENT      1    /**< file-type-specific event */
#define REC_TYPE_FT_SPECIFIC_REPORT     2    /**< file-type-specific report */
#define REC_TYPE_SYSCALL                3    /**< system call */
#define REC_TYPE_SYSTEMD_JOURNAL_EXPORT 4    /**< systemd journal entry */
#define REC_TYPE_CUSTOM_BLOCK           5    /**< pcapng custom block */

typedef struct {
    uint32_t  caplen;           /* data length in the file */
    uint32_t  len;              /* data length on the wire */
    int       pkt_encap;        /* WTAP_ENCAP_ value for this packet */
                                /* pcapng variables */
    uint32_t  interface_id;     /* identifier of the interface. */
                                /* options */

    union wtap_pseudo_header  pseudo_header;
} wtap_packet_header;

/*
 * The pcapng specification says "The word is encoded as an unsigned
 * 32-bit integer, using the endianness of the Section Header Block
 * scope it is in. In the following table, the bits are numbered with
 * 0 being the most-significant bit and 31 being the least-significant
 * bit of the 32-bit unsigned integer."
 *
 * From that, the direction, in bits 0 and 1, is at the *top* of the word.
 *
 * However, several implementations, such as:
 *
 *   the Wireshark pcapng file reading code;
 *
 *   macOS libpcap and tcpdump;
 *
 *   text2pcap;
 *
 *   and probably the software that generated the capture in bug 11665;
 *
 * treat 0 as the *least*-significant bit and bit 31 being the *most*-
 * significant bit of the flags word, and put the direction at the
 * *bottom* of the word.
 *
 * For now, we go with the known implementations.
 */

/* Direction field of the packet flags */
#define PACK_FLAGS_DIRECTION_MASK     0x00000003 /* unshifted */
#define PACK_FLAGS_DIRECTION_SHIFT    0
#define PACK_FLAGS_DIRECTION(pack_flags) (((pack_flags) & PACK_FLAGS_DIRECTION_MASK) >> PACK_FLAGS_DIRECTION_SHIFT)
#define PACK_FLAGS_DIRECTION_UNKNOWN  0
#define PACK_FLAGS_DIRECTION_INBOUND  1
#define PACK_FLAGS_DIRECTION_OUTBOUND 2

/* Reception type field of the packet flags */
#define PACK_FLAGS_RECEPTION_TYPE_MASK        0x0000001C /* unshifted */
#define PACK_FLAGS_RECEPTION_TYPE_SHIFT       2
#define PACK_FLAGS_RECEPTION_TYPE(pack_flags) (((pack_flags) & PACK_FLAGS_RECEPTION_TYPE_MASK) >> PACK_FLAGS_RECEPTION_TYPE_SHIFT)
#define PACK_FLAGS_RECEPTION_TYPE_UNSPECIFIED 0
#define PACK_FLAGS_RECEPTION_TYPE_UNICAST     1
#define PACK_FLAGS_RECEPTION_TYPE_MULTICAST   2
#define PACK_FLAGS_RECEPTION_TYPE_BROADCAST   3
#define PACK_FLAGS_RECEPTION_TYPE_PROMISCUOUS 4

/* FCS length field of the packet flags */
#define PACK_FLAGS_FCS_LENGTH_MASK                        0x000001E0 /* unshifted */
#define PACK_FLAGS_FCS_LENGTH_SHIFT                       5
#define PACK_FLAGS_FCS_LENGTH(pack_flags) (((pack_flags) & PACK_FLAGS_FCS_LENGTH_MASK) >> PACK_FLAGS_FCS_LENGTH_SHIFT)

/* Reserved bits of the packet flags */
#define PACK_FLAGS_RESERVED_MASK                          0x0000FE00

/* Link-layer-dependent errors of the packet flags */

/* For Ethernet and possibly some other network types */
#define PACK_FLAGS_CRC_ERROR                   0x01000000
#define PACK_FLAGS_PACKET_TOO_LONG             0x02000000
#define PACK_FLAGS_PACKET_TOO_SHORT            0x04000000
#define PACK_FLAGS_WRONG_INTER_FRAME_GAP       0x08000000
#define PACK_FLAGS_UNALIGNED_FRAME             0x10000000
#define PACK_FLAGS_START_FRAME_DELIMITER_ERROR 0x20000000
#define PACK_FLAGS_PREAMBLE_ERROR              0x40000000
#define PACK_FLAGS_SYMBOL_ERROR                0x80000000

/* Construct a pack_flags value from its subfield values */
#define PACK_FLAGS_VALUE(direction, reception_type, fcs_length, ll_dependent_errors) \
    (((direction) << 30) | \
    ((reception_type) << 27) | \
    ((fcs_length) << 23) | \
    (ll_dependent_errors))

typedef struct {
    unsigned  record_type;      /* the type of record this is - file type-specific value */
    uint32_t  record_len;       /* length of the record */
} wtap_ft_specific_header;

typedef struct {
    const char *pathname;       /* Path name of file. */
    unsigned  record_type;      /* XXX match ft_specific_record_phdr so that we chain off of packet-pcapng_block for now. */
    int       byte_order;
    /* uint32_t sentinel; */
    uint64_t  timestamp;        /* ns since epoch - XXX dup of ts */
    uint64_t  thread_id;
    uint32_t  event_len;        /* length of the event */
    uint32_t  event_filelen;    /* event data length in the file */
    uint16_t  event_type;
    uint32_t  nparams;          /* number of parameters of the event */
    uint16_t  cpu_id;
    /* ... Event ... */
} wtap_syscall_header;

typedef struct {
    uint32_t  record_len;       /* length of the record */
} wtap_systemd_journal_export_header;

typedef struct {
    uint32_t  length;           /* length of the record */
    uint32_t  pen;              /* private enterprise number */
    bool      copy_allowed;     /* CB can be written */
    union {
        struct nflx {
            uint32_t  type;             /* block type */
            uint32_t  skipped;          /* Used if type == BBLOG_TYPE_SKIPPED_BLOCK */
        } nflx_custom_data_header;
    } custom_data_header;
} wtap_custom_block_header;

#define BBLOG_TYPE_EVENT_BLOCK   1
#define BBLOG_TYPE_SKIPPED_BLOCK 2

/*
 * The largest nstime.secs value that can be put into an unsigned
 * 32-bit quantity.
 *
 * We assume that time_t is signed; it is signed on Windows/MSVC and
 * on many UN*Xes.
 *
 * So, if time_t is 32-bit, we define this as INT32_MAX, as that's
 * the largest value a time_t can have, and it fits in an unsigned
 * 32-bit quantity.  If it's 64-bit or larger, we define this as
 * UINT32_MAX, as, even if it's signed, it can be as large as
 * UINT32_MAX, and that's the largest value that can fit in
 * a 32-bit unsigned quantity.
 *
 * Comparing against this, rather than against G_MAXINT2, when checking
 * whether a time stamp will fit in a 32-bit unsigned integer seconds
 * field in a capture file being written avoids signed vs. unsigned
 * warnings if time_t is a signed 32-bit type.
 *
 * XXX - what if time_t is unsigned?  Are there any platforms where
 * it is?
 */
#define WTAP_NSTIME_32BIT_SECS_MAX ((time_t)(sizeof(time_t) > sizeof(int32_t) ? UINT32_MAX : INT32_MAX))

typedef struct wtap_rec {
    unsigned  rec_type;          /* what type of record is this? */
    uint32_t  presence_flags;    /* what stuff do we have? */
    unsigned  section_number;    /* section, within file, containing this record */
    nstime_t  ts;                /* time stamp */
    int       tsprec;            /* WTAP_TSPREC_ value for this record */
    nstime_t  ts_rel_cap;        /* time stamp relative from capture start */
    bool      ts_rel_cap_valid;  /* is ts_rel_cap valid and can be used? */
    union {
        wtap_packet_header packet_header;
        wtap_ft_specific_header ft_specific_header;
        wtap_syscall_header syscall_header;
        wtap_systemd_journal_export_header systemd_journal_export_header;
        wtap_custom_block_header custom_block_header;
    } rec_header;

    wtap_block_t block ;         /* packet block; holds comments and verdicts in its options */
    bool block_was_modified; /* true if ANY aspect of the block has been modified */

    /*
     * We use a Buffer so that we don't have to allocate and free
     * a buffer for the options for each record.
     */
    Buffer    options_buf;       /* file-type specific data */
} wtap_rec;

/*
 * 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.
 *
 * Only WTAP_HAS_TS and WTAP_HAS_SECTION_NUMBER apply to all record types.
 */
#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_SECTION_NUMBER 0x00000008  /**< section number */

#ifndef MAXNAMELEN
#define MAXNAMELEN      64      /* max name length (hostname and port name) */
#endif

typedef struct hashipv4 {
    unsigned          addr;
    uint8_t           flags;          /* B0 dummy_entry, B1 resolve, B2 If the address is used in the trace */
    char              ip[WS_INET_ADDRSTRLEN];
    char              name[MAXNAMELEN];
} hashipv4_t;

typedef struct hashipv6 {
    uint8_t           addr[16];
    uint8_t           flags;          /* B0 dummy_entry, B1 resolve, B2 If the address is used in the trace */
    char              ip6[WS_INET6_ADDRSTRLEN];
    char              name[MAXNAMELEN];
} hashipv6_t;

/** A struct with lists of resolved addresses.
 *  Used when writing name resolutions blocks (NRB)
 */
typedef struct addrinfo_lists {
    GList      *ipv4_addr_list; /**< A list of resolved hashipv4_t*/
    GList      *ipv6_addr_list; /**< A list of resolved hashipv6_t*/
} addrinfo_lists_t;

/**
 * Parameters for various wtap_dump_* functions, specifying per-file
 * information. The structure itself is no longer used after returning
 * from wtap_dump_*, but its pointer fields must remain valid until
 * wtap_dump_close is called.
 *
 * @note The shb_hdr and idb_inf arguments will be used until
 *     wtap_dump_close() is called, but will not be free'd by the dumper. If
 *     you created them, you must free them yourself after wtap_dump_close().
 *     dsbs_initial will be unreferenced by wtap_dump_close(), so to reuse
 *     them for another dump file, call wtap_block_array_ref() before closing.
 *     dsbs_growing typically refers to another wth->dsbs.
 *     nrbs_growing typically refers to another wth->nrbs.
 *
 * @see wtap_dump_params_init, wtap_dump_params_cleanup.
 */
typedef struct wtap_dump_params {
    int         encap;                      /**< Per-file packet encapsulation, or WTAP_ENCAP_PER_PACKET */
    int         snaplen;                    /**< Per-file snapshot length (what if it's per-interface?) */
    int         tsprec;                     /**< Per-file time stamp precision */
    GArray     *shb_hdrs;                   /**< The section header block(s) information, or NULL. */
    const GArray *shb_iface_to_global;      /**< An array mapping the per-section interface numbers to global IDs
                                                 This array may grow after the dumper is opened if a new
                                                 section header is read. */
    wtapng_iface_descriptions_t *idb_inf;   /**< The interface description information, or NULL. */
    const GArray *nrbs_growing;             /**< NRBs that will be written while writing packets, or NULL.
                                                 This array may grow since the dumper was opened and will subsequently
                                                 be written before newer packets are written in wtap_dump. */
    GArray     *dsbs_initial;               /**< The initial Decryption Secrets Block(s) to be written, or NULL. */
    const GArray *dsbs_growing;             /**< DSBs that will be written while writing packets, or NULL.
                                                 This array may grow since the dumper was opened and will subsequently
                                                 be written before newer packets are written in wtap_dump. */
    const GArray *mevs_growing;             /**< Meta events that will be written while writing packets, or NULL.
                                                 This array may grow since the dumper was opened and will subsequently
                                                 be written before newer packets are written in wtap_dump. */
    bool        dont_copy_idbs;             /**< XXX - don't copy IDBs; this should eventually always be the case. */
} wtap_dump_params;

/* Zero-initializer for wtap_dump_params. */
#define WTAP_DUMP_PARAMS_INIT {.snaplen=0}

struct wtap_dumper;

typedef struct wtap wtap;
typedef struct wtap_dumper wtap_dumper;

typedef struct wtap_reader *FILE_T;

/* Similar to the wtap_open_routine_info for open routines, the following
 * wtap_wslua_file_info struct is used by wslua code for Lua-based file writers.
 *
 * This concept is necessary because when wslua goes to invoke the
 * registered dump/write_open routine callback in Lua, it needs the ref number representing
 * the hooked function inside Lua.  This will be stored in the thing pointed to
 * by the void* data here.  This 'data' pointer will be copied into the
 * wtap_dumper struct's 'void* data' member when calling the dump_open function,
 * which is how wslua finally retrieves it.  Unlike wtap_dumper's 'priv' member, its
 * 'data' member is not free'd in wtap_dump_close().
 */
typedef struct wtap_wslua_file_info {
    int (*wslua_can_write_encap)(int, void*);   /* a can_write_encap func for wslua uses */
    void* wslua_data;                           /* holds the wslua data */
} wtap_wslua_file_info_t;

/*
 * For registering extensions used for file formats.
 *
 * These items are used in dialogs for opening files, so that
 * the user can ask to see all capture files (as identified
 * by file extension) or particular types of capture files.
 *
 * Each item has a human-readable description of the file types
 * (possibly more than one!) that use all of this set of extensions,
 * a flag indicating whether it's a capture file or just some file
 * whose contents we can dissect, and a list of extensions files of
 * that type might have.
 *
 * Note that entries in this table do *not* necessarily correspoond
 * to single file types; for example, the entry that lists just "cap"
 * is for several file formats, all of which use the extension ".cap".
 *
 * Also note that a given extension may appear in multiple entries;
 * for example, "cap" (again!) is in an entry for some file types
 * that use only ".cap" and in entries for file types that use
 * ".cap" and some other extensions, and ".trc" is used both for
 * DOS Sniffer Token Ring captures ("trc") and EyeSDN USB ISDN
 * trace files ("tr{a}c{e}").
 *
 * Some entries aren't for capture file types, they're just generic types,
 * such as "text file" or "XML file", that can be used for, among other
 * things, captures we can read, or for file formats we can read in
 * order to dissect the contents of the file (think of this as "Fileshark",
 * which is a program that we really should have).  Those are marked
 * specially, because, in file section dialogs, the user should be able
 * to select "All Capture Files" and get a set of extensions that are
 * associated with capture file formats, but not with files in other
 * formats that might or might not contain captured packets (such as
 * .txt or .xml") or formats that aren't capture files but that we
 * support as "we're being Fileshark now" (such as .jpeg).  The routine
 * that constructs a list of extensions for "All Capture Files" omits
 * extensions for those entries.
 */
struct file_extension_info {
    /* the file type description */
    const char *name;

    /* true if this is a capture file type */
    bool is_capture_file;

    /* a semicolon-separated list of file extensions used for this type */
    const char *extensions;
};

/*
 * For registering file types that we can open.
 *
 * Each file type has an open routine.
 *
 * The open routine should return:
 *
 *      WTAP_OPEN_ERROR on an I/O error;
 *
 *      WTAP_OPEN_MINE if the file it's reading is one of the types
 *      it handles;
 *
 *      WTAP_OPEN_NOT_MINE if the file it's reading isn't one of the
 *      types it handles.
 *
 * If the routine handles this type of file, it should set the
 * "file_type_subtype" field in the "struct wtap" to the type of the file.
 *
 * Note that the routine does not have to free the private data pointer on
 * error. The caller takes care of that by calling wtap_close on error.
 * (See https://gitlab.com/wireshark/wireshark/-/issues/8518)
 *
 * However, the caller does have to free the private data pointer when
 * returning WTAP_OPEN_NOT_MINE, since the next file type will be called
 * and will likely just overwrite the pointer.
 */
typedef enum {
    WTAP_OPEN_NOT_MINE = 0,
    WTAP_OPEN_MINE = 1,
    WTAP_OPEN_ERROR = -1
} wtap_open_return_val;

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

/*
 * Some file formats have defined magic numbers at fixed offsets from
 * the beginning of the file; those routines should return 1 if and
 * only if the file has the magic number at that offset.  (pcapng
 * is a bit of a special case, as it has both the Section Header Block
 * type field and its byte-order magic field; it checks for both.)
 * Those file formats do not require a file name extension in order
 * to recognize them or to avoid recognizing other file types as that
 * type, and have no extensions specified for them.
 *
 * Other file formats don't have defined magic numbers at fixed offsets,
 * so a heuristic is required.  If that file format has any file name
 * extensions used for it, a list of those extensions should be
 * specified, so that, if the name of the file being opened has an
 * extension, the file formats that use that extension are tried before
 * the ones that don't, to handle the case where a file of one type
 * might be recognized by the heuristics for a different file type.
 */
typedef enum {
    OPEN_INFO_MAGIC = 0,
    OPEN_INFO_HEURISTIC = 1
} wtap_open_type;

WS_DLL_PUBLIC void init_open_routines(void);

void cleanup_open_routines(void);

/*
 * Information about a given file type that applies to all subtypes of
 * the file type.
 *
 * Each file type has:
 *
 *    a human-readable description of the file type, for use in the
 *      user interface;
 *    a wtap_open_type indication of how the open routine
 *      determines whether a file is of that type;
 *    an open routine;
 *    an optional list of extensions used for this file type;
 *    data to be passed to Lua file readers - this should be NULL for
 *      non-Lua (C) file readers.
 *
 * The list of file extensions is used as a hint when calling open routines
 * to open a file; heuristic open routines whose list of extensions includes
 * the file's extension are called before heuristic open routines whose
 * (possibly-empty) list of extensions doesn't contain the file's extension,
 * to reduce the chances that a file will be misidentified due to an heuristic
 * test with a weak heuristic being done before a heuristic test for the
 * file's type.
 *
 * The list of extensions should be NULL for magic-number open routines,
 * as it will not be used for any purpose (no such hinting is done).
 */
struct open_info {
    const char *name;                 /* Description */
    wtap_open_type type;              /* Open routine type */
    wtap_open_routine_t open_routine; /* Open routine */
    const char *extensions;           /* List of extensions used for this file type */
    char **extensions_set;           /* Array of those extensions; populated using extensions member during initialization */
    void* wslua_data;                 /* Data for Lua file readers */
};
WS_DLL_PUBLIC struct open_info *open_routines;

/*
 * Types of comments.
 */
#define WTAP_COMMENT_PER_SECTION        0x00000001      /* per-file/per-file-section */
#define WTAP_COMMENT_PER_INTERFACE      0x00000002      /* per-interface */
#define WTAP_COMMENT_PER_PACKET         0x00000004      /* per-packet */

/*
 * For a given option type in a certain block type, does a file format
 * not support it, support only one such option, or support multiple
 * such options?
 */
typedef enum {
    OPTION_NOT_SUPPORTED,
    ONE_OPTION_SUPPORTED,
    MULTIPLE_OPTIONS_SUPPORTED
} option_support_t;

/*
 * Entry in a table of supported option types.
 */
struct supported_option_type {
    unsigned opt;
    option_support_t support; /* OPTION_NOT_SUPPORTED allowed, equivalent to absence */
};

#define OPTION_TYPES_SUPPORTED(option_type_array) \
    sizeof option_type_array / sizeof option_type_array[0], option_type_array

#define NO_OPTIONS_SUPPORTED \
    0, NULL

/*
 * For a given block type, does a file format not support it, support
 * only one such block, or support multiple such blocks?
 */
typedef enum {
    BLOCK_NOT_SUPPORTED,
    ONE_BLOCK_SUPPORTED,
    MULTIPLE_BLOCKS_SUPPORTED
} block_support_t;

/*
 * Entry in a table of supported block types.
 */
struct supported_block_type {
    wtap_block_type_t type;
    block_support_t support; /* BLOCK_NOT_SUPPORTED allowed, equivalent to absence */
    size_t num_supported_options;
    const struct supported_option_type *supported_options;
};

#define BLOCKS_SUPPORTED(block_type_array) \
    sizeof block_type_array / sizeof block_type_array[0], block_type_array

struct file_type_subtype_info {
    /**
     * The file type description.
     */
    const char *description;

    /**
     * The file type name, used to look up file types by name, e.g.
     * looking up a file type specified as a command-line argument.
     */
    const char *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?
     */
    bool writing_must_seek;

    /**
     * Number of block types supported.
     */
    size_t num_supported_blocks;

    /**
     * Table of block types supported.
     */
    const struct supported_block_type *supported_blocks;

    /**
     * Can this type write this encapsulation format?
     * Should be NULL is this file type doesn't have write support.
     *
     * XXX - This returns an int because it can return err codes,
     * specifically WTAP_ERR_CHECK_WSLUA (instead of having an
     * int *err parameter like the other functions.)
     */
    int (*can_write_encap)(int);

    /**
     * The function to open the capture file for writing.
     * Should be NULL if this file type doesn't have write support.
     */
    bool (*dump_open)(wtap_dumper *, int *, char **);

    /**
     * If can_write_encap returned WTAP_ERR_CHECK_WSLUA, then this is used instead.
     * This should be NULL for everyone except Lua-based file writers.
     */
    wtap_wslua_file_info_t *wslua_info;
};

#define WTAP_TYPE_AUTO 0

/**
 * @brief Initialize the Wiretap library.
 *
 * @param load_wiretap_plugins Load Wiretap plugins when initializing library.
*/
WS_DLL_PUBLIC
void wtap_init(bool load_wiretap_plugins);

/** 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 type WTAP_TYPE_AUTO for automatic recognize file format or explicit choose format type
 * @param[out] 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[out] 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
 */
WS_DLL_PUBLIC
struct wtap* wtap_open_offline(const char *filename, unsigned int type, int *err,
    char **err_info, bool 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.
 */
WS_DLL_PUBLIC
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 unsigned addr, const char *name, const bool static_entry);
WS_DLL_PUBLIC
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 char *name, const bool static_entry);
WS_DLL_PUBLIC
void wtap_set_cb_new_ipv6(wtap *wth, wtap_new_ipv6_callback_t add_new_ipv6);

/**
 * Set callback function to receive new decryption secrets for a particular
 * secrets type (as defined in secrets-types.h). Currently pcapng-only.
 */
typedef void (*wtap_new_secrets_callback_t)(uint32_t secrets_type, const void *secrets, unsigned size);
WS_DLL_PUBLIC
void wtap_set_cb_new_secrets(wtap *wth, wtap_new_secrets_callback_t add_new_secrets);

/** Read the next record in the file, filling in *phdr and *buf.
 *
 * @wth a wtap * returned by a call that opened a file for reading.
 * @rec a pointer to a wtap_rec, filled in with information about the
 * record.
 * @buf a pointer to a Buffer, filled in with data from the record.
 * @param err a positive "errno" value, or a negative number indicating
 * the type of error, if the read failed.
 * @param err_info for some errors, a string giving more details of
 * the error
 * @param offset a pointer to a int64_t, set to the offset in the file
 * that should be used on calls to wtap_seek_read() to reread that record,
 * if the read succeeded.
 * @return true on success, false on failure.
 */
WS_DLL_PUBLIC
bool wtap_read(wtap *wth, wtap_rec *rec, Buffer *buf, int *err,
    char **err_info, int64_t *offset);

/** Read the record at a specified offset in a capture file, filling in
 * *phdr and *buf.
 *
 * @wth a wtap * returned by a call that opened a file for random-access
 * reading.
 * @seek_off a int64_t giving an offset value returned by a previous
 * wtap_read() call.
 * @rec a pointer to a struct wtap_rec, filled in with information
 * about the record.
 * @buf a pointer to a Buffer, filled in with data from the record.
 * @param err a positive "errno" value, or a negative number indicating
 * the type of error, if the read failed.
 * @param err_info for some errors, a string giving more details of
 * the error
 * @return true on success, false on failure.
 */
WS_DLL_PUBLIC
bool wtap_seek_read(wtap *wth, int64_t seek_off, wtap_rec *rec,
    Buffer *buf, int *err, char **err_info);

/*** initialize a wtap_rec structure ***/
WS_DLL_PUBLIC
void wtap_rec_init(wtap_rec *rec);

/*** Re-initialize a wtap_rec structure ***/
WS_DLL_PUBLIC
void wtap_rec_reset(wtap_rec *rec);

/*** clean up a wtap_rec structure, freeing what wtap_rec_init() allocated */
WS_DLL_PUBLIC
void wtap_rec_cleanup(wtap_rec *rec);

/*
 * Types of compression for a file, including "none".
 */
typedef enum {
    WTAP_UNCOMPRESSED,
    WTAP_GZIP_COMPRESSED,
    WTAP_ZSTD_COMPRESSED,
    WTAP_LZ4_COMPRESSED
} wtap_compression_type;

WS_DLL_PUBLIC
wtap_compression_type wtap_get_compression_type(wtap *wth);
WS_DLL_PUBLIC
const char *wtap_compression_type_description(wtap_compression_type compression_type);
WS_DLL_PUBLIC
const char *wtap_compression_type_extension(wtap_compression_type compression_type);
WS_DLL_PUBLIC
GSList *wtap_get_all_compression_type_extensions_list(void);

/*** 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. */
WS_DLL_PUBLIC
int64_t wtap_read_so_far(wtap *wth);
WS_DLL_PUBLIC
int64_t wtap_file_size(wtap *wth, int *err);
WS_DLL_PUBLIC
unsigned wtap_snapshot_length(wtap *wth); /* per file */
WS_DLL_PUBLIC
int wtap_file_type_subtype(wtap *wth);
WS_DLL_PUBLIC
int wtap_file_encap(wtap *wth);
WS_DLL_PUBLIC
int wtap_file_tsprec(wtap *wth);

/**
 * @brief Gets number of section header blocks.
 * @details Returns the number of existing SHBs.
 *
 * @param wth The wiretap session.
 * @return The number of existing section headers.
 */
WS_DLL_PUBLIC
unsigned wtap_file_get_num_shbs(wtap *wth);

/**
 * @brief Gets existing section header block, not for new file.
 * @details Returns the pointer to an existing SHB, without creating a
 *          new one. This should only be used for accessing info, not
 *          for creating a new file based on existing SHB info. Use
 *          wtap_file_get_shb_for_new_file() for that.
 *
 * @param wth The wiretap session.
 * @param shb_num The ordinal number (0-based) of the section header
 * in the file
 * @return The specified existing section header, which must NOT be g_free'd.
 */
WS_DLL_PUBLIC
wtap_block_t wtap_file_get_shb(wtap *wth, unsigned shb_num);

/**
 * @brief Sets or replaces the section header comment.
 * @details The passed-in comment string is set to be the comment
 *          for the section header block. The passed-in string's
 *          ownership will be owned by the block, so it should be
 *          duplicated before passing into this function.
 *
 * @param wth The wiretap session.
 * @param comment The comment string.
 */
WS_DLL_PUBLIC
void wtap_write_shb_comment(wtap *wth, char *comment);

/**
 * @brief Gets the unique interface id for a SHB's interface
 * @details Given an existing SHB number and an interface ID within
 *          that section, returns the unique ordinal number (0-based)
 *          of that interface over the entire wiretap session.
 *
 * @param wth The wiretap session.
 * @param shb_num The ordinal number (0-based) of a section header
 * @param interface_id An interface id within the section
 * @return The unique wtap session-wide interface id for that interface
 */
WS_DLL_PUBLIC
unsigned wtap_file_get_shb_global_interface_id(wtap *wth, unsigned shb_num, uint32_t interface_id);

/**
 * @brief Gets existing interface descriptions.
 * @details Returns a new struct containing a pointer to the existing
 *          description, without creating new descriptions internally.
 * @note The returned pointer must be g_free'd, but its internal
 *       interface_data must not.
 *
 * @param wth The wiretap session.
 * @return A new struct of the existing section descriptions, which must be g_free'd.
 */
WS_DLL_PUBLIC
wtapng_iface_descriptions_t *wtap_file_get_idb_info(wtap *wth);

/**
 * @brief Gets next interface description.
 *
 * @details This returns the first unfetched wtap_block_t from the set
 * of interface descriptions.  Returns NULL if there are no more
 * unfetched interface descriptions; a subsequent call after
 * wtap_read() returns, either with a new record or an EOF, may return
 * another interface description.
 */
WS_DLL_PUBLIC
wtap_block_t wtap_get_next_interface_description(wtap *wth);

/**
 * @brief Free's a interface description block and all of its members.
 *
 * @details This free's all of the interface descriptions inside the passed-in
 *     struct, including their members (e.g., comments); and then free's the
 *     passed-in struct as well.
 *
 * @warning Do not use this for the struct returned by
 *     wtap_file_get_idb_info(), as that one did not create the internal
 *     interface descriptions; for that case you can simply g_free() the new
 *     struct.
 */
WS_DLL_PUBLIC
void wtap_free_idb_info(wtapng_iface_descriptions_t *idb_info);

/**
 * @brief Gets a debug string of an interface description.
 * @details Returns a newly allocated string of debug information about
 *          the given interface descrption, useful for debugging.
 * @note The returned pointer must be g_free'd.
 *
 * @param if_descr The interface description.
 * @param indent Number of spaces to indent each line by.
 * @param line_end A string to append to each line (e.g., "\n" or ", ").
 * @return A newly allocated gcahr array string, which must be g_free'd.
 */
WS_DLL_PUBLIC
char *wtap_get_debug_if_descr(const wtap_block_t if_descr,
                               const int indent,
                               const char* line_end);

/**
 * @brief Gets existing name resolution block, not for new file.
 * @details Returns the pointer to the existing NRB, without creating a
 *          new one. This should only be used for accessing info, not
 *          for creating a new file based on existing NRB info. Use
 *          wtap_file_get_nrb_for_new_file() for that.
 *
 * @param wth The wiretap session.
 * @return The existing section header, which must NOT be g_free'd.
 *
 * XXX - need to be updated to handle multiple NRBs.
 */
WS_DLL_PUBLIC
wtap_block_t wtap_file_get_nrb(wtap *wth);

/**
 * @brief Gets number of decryption secrets blocks.
 * @details Returns the number of existing DSBs.
 *
 * @param wth The wiretap session.
 * @return The number of existing decryption secrets blocks.
 */
WS_DLL_PUBLIC
unsigned wtap_file_get_num_dsbs(wtap *wth);

/**
 * @brief Gets existing decryption secrets block, not for new file.
 * @details Returns the pointer to an existing DSB, without creating a
 *          new one. This should only be used for accessing info.
 *
 * @param wth The wiretap session.
 * @param dsb_num The ordinal number (0-based) of the decryption secrets block
 * in the file
 * @return The specified existing decryption secrets block, which must NOT be g_free'd.
 */
WS_DLL_PUBLIC
wtap_block_t wtap_file_get_dsb(wtap *wth, unsigned dsb_num);

/**
 * @brief Adds a Decryption Secrets Block to the open wiretap session.
 * @details The passed-in DSB is added to the DSBs for the current
 *          session.
 *
 * @param wth The wiretap session.
 * @param dsb The Decryption Secrets Block to add
 */
WS_DLL_PUBLIC
void wtap_file_add_decryption_secrets(wtap *wth, const wtap_block_t dsb);

/**
 * Remove any decryption secret information from the per-file information;
 * used if we're stripping decryption secrets while the file is open
 *
 * @param wth The wiretap session from which to remove the
 * decryption secrets.
 * @return true if any DSBs were removed
 */
WS_DLL_PUBLIC
bool wtap_file_discard_decryption_secrets(wtap *wth);

/*** close the file descriptors for the current file ***/
WS_DLL_PUBLIC
void wtap_fdclose(wtap *wth);

/*** reopen the random file descriptor for the current file ***/
WS_DLL_PUBLIC
bool wtap_fdreopen(wtap *wth, const char *filename, int *err);

/** Close only the sequential side, freeing up memory it uses. */
WS_DLL_PUBLIC
void wtap_sequential_close(wtap *wth);

/** Closes any open file handles and frees the memory associated with wth. */
WS_DLL_PUBLIC
void wtap_close(wtap *wth);

/*** dump packets into a capture file ***/
WS_DLL_PUBLIC
bool wtap_dump_can_open(int filetype);

/**
 * Given a GArray of WTAP_ENCAP_ types, return the per-file encapsulation
 * type that would be needed to write out a file with those types.
 */
WS_DLL_PUBLIC
int wtap_dump_required_file_encap_type(const GArray *file_encaps);

/**
 * Return true if we can write this encapsulation type in this
 * capture file type/subtype, false if not.
 */
WS_DLL_PUBLIC
bool wtap_dump_can_write_encap(int file_type_subtype, int encap);

/**
 * Return true if we can write this capture file type/subtype out in
 * compressed form, false if not.
 */
WS_DLL_PUBLIC
bool wtap_dump_can_compress(int file_type_subtype);

/**
 * Initialize the per-file information based on an existing file. Its
 * contents must be freed according to the requirements of wtap_dump_params.
 * If wth does not remain valid for the duration of the session, dsbs_growing
 * MUST be cleared after this function.
 *
 * @param params The parameters for wtap_dump_* to initialize.
 * @param wth The wiretap session.
 */
WS_DLL_PUBLIC
void wtap_dump_params_init(wtap_dump_params *params, wtap *wth);

/**
 * Initialize the per-file information based on an existing file, but
 * don't copy over the interface information. Its contents must be freed
 * according to the requirements of wtap_dump_params.
 * If wth does not remain valid for the duration of the session, dsbs_growing
 * MUST be cleared after this function.
 *
 * XXX - this should eventually become wtap_dump_params_init(), with all
 * programs writing capture files copying IDBs over by hand, so that they
 * handle IDBs in the middle of the file.
 *
 * @param params The parameters for wtap_dump_* to initialize.
 * @param wth The wiretap session.
 */
WS_DLL_PUBLIC
void wtap_dump_params_init_no_idbs(wtap_dump_params *params, wtap *wth);

/**
 * Remove any name resolution information from the per-file information;
 * used if we're stripping name resolution as we write the file.
 *
 * @param params The parameters for wtap_dump_* from which to remove the
 * name resolution..
 */
WS_DLL_PUBLIC
void wtap_dump_params_discard_name_resolution(wtap_dump_params *params);

/**
 * Remove any decryption secret information from the per-file information;
 * used if we're stripping decryption secrets as we write the file.
 *
 * @param params The parameters for wtap_dump_* from which to remove the
 * decryption secrets..
 */
WS_DLL_PUBLIC
void wtap_dump_params_discard_decryption_secrets(wtap_dump_params *params);

/**
 * Free memory associated with the wtap_dump_params when it is no longer in
 * use by wtap_dumper.
 *
 * @param params The parameters as initialized by wtap_dump_params_init.
 */
WS_DLL_PUBLIC
void wtap_dump_params_cleanup(wtap_dump_params *params);

/**
 * @brief Opens a new capture file for writing.
 *
 * @param filename The new file's name.
 * @param file_type_subtype The WTAP_FILE_TYPE_SUBTYPE_XXX file type.
 * @param compression_type Type of compression to use when writing, if any
 * @param params The per-file information for this file.
 * @param[out] err Will be set to an error code on failure.
 * @param[out] err_info for some errors, a string giving more details of
 * the error
 * @return The newly created dumper object, or NULL on failure.
 */
WS_DLL_PUBLIC
wtap_dumper* wtap_dump_open(const char *filename, int file_type_subtype,
    wtap_compression_type compression_type, const wtap_dump_params *params,
    int *err, char **err_info);

/**
 * @brief Creates a dumper for a temporary file.
 *
 * @param tmpdir Directory in which to create the temporary file.
 * @param filenamep Points to a pointer that's set to point to the
 *        pathname of the temporary file; it's allocated with g_malloc()
 * @param pfx A string to be used as the prefix for the temporary file name
 * @param file_type_subtype The WTAP_FILE_TYPE_SUBTYPE_XXX file type.
 * @param compression_type Type of compression to use when writing, if any
 * @param params The per-file information for this file.
 * @param[out] err Will be set to an error code on failure.
 * @param[out] err_info for some errors, a string giving more details of
 * the error
 * @return The newly created dumper object, or NULL on failure.
 */
WS_DLL_PUBLIC
wtap_dumper* wtap_dump_open_tempfile(const char *tmpdir, char **filenamep,
    const char *pfx,
    int file_type_subtype, wtap_compression_type compression_type,
    const wtap_dump_params *params, int *err, char **err_info);

/**
 * @brief Creates a dumper for an existing file descriptor.
 *
 * @param fd The file descriptor for which the dumper should be created.
 * @param file_type_subtype The WTAP_FILE_TYPE_SUBTYPE_XXX file type.
 * @param compression_type Type of compression to use when writing, if any
 * @param params The per-file information for this file.
 * @param[out] err Will be set to an error code on failure.
 * @param[out] err_info for some errors, a string giving more details of
 * the error
 * @return The newly created dumper object, or NULL on failure.
 */
WS_DLL_PUBLIC
wtap_dumper* wtap_dump_fdopen(int fd, int file_type_subtype,
    wtap_compression_type compression_type, const wtap_dump_params *params,
    int *err, char **err_info);

/**
 * @brief Creates a dumper for the standard output.
 *
 * @param file_type_subtype The WTAP_FILE_TYPE_SUBTYPE_XXX file type.
 * @param compression_type Type of compression to use when writing, if any
 * @param params The per-file information for this file.
 * @param[out] err Will be set to an error code on failure.
 * @param[out] err_info for some errors, a string giving more details of
 * the error
 * @return The newly created dumper object, or NULL on failure.
 */
WS_DLL_PUBLIC
wtap_dumper* wtap_dump_open_stdout(int file_type_subtype,
    wtap_compression_type compression_type, const wtap_dump_params *params,
    int *err, char **err_info);

/*
 * Add an IDB to the list of IDBs for a file we're writing.
 * Makes a copy of the IDB, so it can be freed after this call is made.
 *
 * @param wdh handle for the file we're writing.
 * @param idb the IDB to add
 * @param[out] err Will be set to an error code on failure.
 * @param[out] err_info for some errors, a string giving more details of
 * the error.
 * @return true on success, false on failure.
 */
WS_DLL_PUBLIC
bool wtap_dump_add_idb(wtap_dumper *wdh, wtap_block_t idb, int *err,
     char **err_info);
WS_DLL_PUBLIC
bool wtap_dump(wtap_dumper *, const wtap_rec *, const uint8_t *,
     int *err, char **err_info);
WS_DLL_PUBLIC
bool wtap_dump_flush(wtap_dumper *, int *);
WS_DLL_PUBLIC
int wtap_dump_file_type_subtype(wtap_dumper *wdh);
WS_DLL_PUBLIC
int64_t wtap_get_bytes_dumped(wtap_dumper *);
WS_DLL_PUBLIC
void wtap_set_bytes_dumped(wtap_dumper *wdh, int64_t bytes_dumped);
struct addrinfo;
WS_DLL_PUBLIC
bool wtap_addrinfo_list_empty(addrinfo_lists_t *addrinfo_lists);
WS_DLL_PUBLIC
bool wtap_dump_set_addrinfo_list(wtap_dumper *wdh, addrinfo_lists_t *addrinfo_lists);
WS_DLL_PUBLIC
void wtap_dump_discard_name_resolution(wtap_dumper *wdh);
WS_DLL_PUBLIC
void wtap_dump_discard_decryption_secrets(wtap_dumper *wdh);

/**
 * Closes open file handles and frees memory associated with wdh. Note that
 * shb_hdr and idb_inf are not freed by this routine.
 *
 * @param wdh handle for the file we're closing.
 * @param[out] needs_reload if not null, points to a bool that will
 *    be set to true if a full reload of the file would be required if
 *    this was done as part of a "Save" or "Save As" operation, false
 *    if no full reload would be required.
 * @param[out] err points to an int that will be set to an error code
 *    on failure.
 * @param[out] err_info for some errors, points to a char * that will
 *    be set to a string giving more details of the error.
 *
 * @return true on success, false on failure.
 */
WS_DLL_PUBLIC
bool wtap_dump_close(wtap_dumper *wdh, bool *needs_reload,
    int *err, char **err_info);

/**
 * Return true if we can write a file out with the given GArray of file
 * encapsulations and the given bitmask of comment types.
 */
WS_DLL_PUBLIC
bool wtap_dump_can_write(const GArray *file_encaps, uint32_t required_comment_types);

/**
 * Generates arbitrary packet data in "exported PDU" format
 * and appends it to buf.
 * For filetype readers to transform non-packetized data.
 * Calls ws_buffer_asssure_space() for you and handles padding
 * to 4-byte boundary.
 *
 * @param[in,out] buf   Buffer into which to write field
 * @param epdu_tag      tag ID of field to create
 * @param data          data to be written
 * @param data_len      length of data
 */
WS_DLL_PUBLIC
void wtap_buffer_append_epdu_tag(Buffer *buf, uint16_t epdu_tag, const uint8_t *data, uint16_t data_len);

/**
 * Generates packet data for an unsigned integer in "exported PDU" format.
 * For filetype readers to transform non-packetized data.
 *
 * @param[in,out] buf   Buffer into which to write field
 * @param epdu_tag      tag ID of field to create
 * @param val           integer value to write to buf
 */
WS_DLL_PUBLIC
void wtap_buffer_append_epdu_uint(Buffer *buf, uint16_t epdu_tag, uint32_t val);

/**
 * Generates packet data for a string in "exported PDU" format.
 * For filetype readers to transform non-packetized data.
 *
 * @param[in,out] buf   Buffer into which to write field
 * @param epdu_tag      tag ID of field to create
 * @param val           string value to write to buf
 */
WS_DLL_PUBLIC
void wtap_buffer_append_epdu_string(Buffer *buf, uint16_t epdu_tag, const char *val);

/**
 * Close off a set of "exported PDUs" added to the buffer.
 * For filetype readers to transform non-packetized data.
 *
 * @param[in,out] buf   Buffer into which to write field
 *
 * @return Total length of buf populated to date
 */
WS_DLL_PUBLIC
int wtap_buffer_append_epdu_end(Buffer *buf);

/*
 * Sort the file types by name or by description?
 */
typedef enum {
        FT_SORT_BY_NAME,
        FT_SORT_BY_DESCRIPTION
} ft_sort_order;

/**
 * Get a GArray of file type/subtype values for file types/subtypes
 * that can be used to save a file of a given type with a given GArray of
 * WTAP_ENCAP_ types and the given bitmask of comment types.
 */
WS_DLL_PUBLIC
GArray *wtap_get_savable_file_types_subtypes_for_file(int file_type_subtype,
    const GArray *file_encaps, uint32_t required_comment_types,
    ft_sort_order sort_order);

/**
 * Get a GArray of all writable file type/subtype values.
 */
WS_DLL_PUBLIC
GArray *wtap_get_writable_file_types_subtypes(ft_sort_order sort_order);

/*** various file type/subtype functions ***/
WS_DLL_PUBLIC
const char *wtap_file_type_subtype_description(int file_type_subtype);
WS_DLL_PUBLIC
const char *wtap_file_type_subtype_name(int file_type_subtype);
WS_DLL_PUBLIC
int wtap_name_to_file_type_subtype(const char *name);
WS_DLL_PUBLIC
int wtap_pcap_file_type_subtype(void);
WS_DLL_PUBLIC
int wtap_pcap_nsec_file_type_subtype(void);
WS_DLL_PUBLIC
int wtap_pcapng_file_type_subtype(void);

/**
 * Return an indication of whether this capture file format supports
 * the block in question.
 */
WS_DLL_PUBLIC
block_support_t wtap_file_type_subtype_supports_block(int file_type_subtype,
    wtap_block_type_t type);

/**
 * Return an indication of whether this capture file format supports
 * the option in queston for the block in question.
 */
WS_DLL_PUBLIC
option_support_t wtap_file_type_subtype_supports_option(int file_type_subtype,
    wtap_block_type_t type, unsigned opttype);

/* Return a list of all extensions that are used by all capture file
 * types, including compressed extensions, e.g. not just "pcap" but
 * also "pcap.gz" if we can read gzipped files.
 *
 * "Capture files" means "include file types that correspond to
 * collections of network packets, but not file types that
 * store data that just happens to be transported over protocols
 * such as HTTP but that aren't collections of network packets",
 * so that it could be used for "All Capture Files" without picking
 * up JPEG files or files such as that - those aren't capture files,
 * and we *do* have them listed in the long list of individual file
 * types, so omitting them from "All Capture Files" is the right
 * thing to do.
 *
 * All strings in the list are allocated with g_malloc() and must be freed
 * with g_free().
 *
 * This is used to generate a list of extensions to look for if the user
 * chooses "All Capture Files" in a file open dialog.
 */
WS_DLL_PUBLIC
GSList *wtap_get_all_capture_file_extensions_list(void);

/* Return a list of all extensions that are used by all file types that
 * we can read, including compressed extensions, e.g. not just "pcap" but
 * also "pcap.gz" if we can read gzipped files.
 *
 * "File type" means "include file types that correspond to collections
 * of network packets, as well as file types that store data that just
 * happens to be transported over protocols such as HTTP but that aren't
 * collections of network packets, and plain text files".
 *
 * All strings in the list are allocated with g_malloc() and must be freed
 * with g_free().
 */
WS_DLL_PUBLIC
GSList *wtap_get_all_file_extensions_list(void);

/*
 * Free a list returned by wtap_get_file_extension_type_extensions(),
 * wtap_get_all_capture_file_extensions_list, wtap_get_file_extensions_list(),
 * or wtap_get_all_file_extensions_list().
 */
WS_DLL_PUBLIC
void wtap_free_extensions_list(GSList *extensions);

/*
 * Return the default file extension to use with the specified file type
 * and subtype; that's just the extension, without any ".".
 */
WS_DLL_PUBLIC
const char *wtap_default_file_extension(int file_type_subtype);

/* Return a list of file extensions that are used by the specified file type
 * and subtype.
 *
 * If include_compressed is true, the list will include compressed
 * extensions, e.g. not just "pcap" but also "pcap.gz" if we can read
 * gzipped files.
 *
 * All strings in the list are allocated with g_malloc() and must be freed
 * with g_free().
 */
WS_DLL_PUBLIC
GSList *wtap_get_file_extensions_list(int file_type_subtype, bool include_compressed);

WS_DLL_PUBLIC
const char *wtap_encap_name(int encap);
WS_DLL_PUBLIC
const char *wtap_encap_description(int encap);
WS_DLL_PUBLIC
int wtap_name_to_encap(const char *short_name);

WS_DLL_PUBLIC
const char* wtap_tsprec_string(int tsprec);

WS_DLL_PUBLIC
const char *wtap_strerror(int err);

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

/*** get information for file type extension ***/
WS_DLL_PUBLIC
const char *wtap_get_file_extension_type_name(int extension_type);
WS_DLL_PUBLIC
GSList *wtap_get_file_extension_type_extensions(unsigned extension_type);

/*** dynamically register new file types and encapsulations ***/
WS_DLL_PUBLIC
void wtap_register_file_type_extension(const struct file_extension_info *ei);

typedef struct {
        void (*register_wtap_module)(void);  /* routine to call to register a wiretap module */
} wtap_plugin;

WS_DLL_PUBLIC
void wtap_register_plugin(const wtap_plugin *plug);

/** Returns_
 *     0 if plugins can be loaded for libwiretap (file type).
 *     1 if plugins are not supported by the platform.
 *    -1 if plugins were disabled in the build configuration.
 */
WS_DLL_PUBLIC
int wtap_plugins_supported(void);

WS_DLL_PUBLIC
void wtap_register_open_info(struct open_info *oi, const bool first_routine);
WS_DLL_PUBLIC
bool wtap_has_open_info(const char *name);
WS_DLL_PUBLIC
bool wtap_uses_lua_filehandler(const wtap* wth);
WS_DLL_PUBLIC
void wtap_deregister_open_info(const char *name);

WS_DLL_PUBLIC
unsigned int open_info_name_to_type(const char *name);
WS_DLL_PUBLIC
int wtap_register_file_type_subtype(const struct file_type_subtype_info* fi);
WS_DLL_PUBLIC
void wtap_deregister_file_type_subtype(const int file_type_subtype);

WS_DLL_PUBLIC
int wtap_register_encap_type(const char *description, const char *name);

/*** Cleanup the internal library structures */
WS_DLL_PUBLIC
void wtap_cleanup(void);

/**
 * 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're
       reading that 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_UNWRITABLE_FILE_TYPE          -7
    /**< Wiretap can't save files in the specified format */

#define WTAP_ERR_UNWRITABLE_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_WRITE                   -10
    /**< An attempt to read failed, reason unknown */

#define WTAP_ERR_CANT_CLOSE                   -11
    /**< The file couldn't be closed, reason unknown */

#define WTAP_ERR_SHORT_READ                   -12
    /**< An attempt to 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_OVERFLOW                 -15
    /**< Uncompressing Sniffer data would overflow buffer */

#define WTAP_ERR_RANDOM_OPEN_STDIN            -16
    /**< We're trying to open the standard input for random access */

#define WTAP_ERR_COMPRESSION_NOT_SUPPORTED    -17
    /**< The filetype doesn't support output compression */

#define WTAP_ERR_CANT_SEEK                    -18
    /**< An attempt to seek failed, reason unknown */

#define WTAP_ERR_CANT_SEEK_COMPRESSED         -19
    /**< An attempt to seek on a compressed stream */

#define WTAP_ERR_DECOMPRESS                   -20
    /**< Error decompressing */

#define WTAP_ERR_INTERNAL                     -21
    /**< "Shouldn't happen" internal errors */

#define WTAP_ERR_PACKET_TOO_LARGE             -22
    /**< Packet being written is larger than we support; do not use when
        reading, use WTAP_ERR_BAD_FILE instead */

#define WTAP_ERR_CHECK_WSLUA                  -23
    /**< Not really an error: the file type being checked is from a Lua
        plugin, so that the code will call wslua_can_write_encap() instead if it gets this */

#define WTAP_ERR_UNWRITABLE_REC_TYPE          -24
    /**< Specified record type can't be written to that file type */

#define WTAP_ERR_UNWRITABLE_REC_DATA          -25
    /**< Something in the record data can't be written to that file type */

#define WTAP_ERR_DECOMPRESSION_NOT_SUPPORTED  -26
    /**< We don't support decompressing that type of compressed file */

#define WTAP_ERR_TIME_STAMP_NOT_SUPPORTED     -27
    /**< We don't support writing that record's time stamp to that
         file type  */

#ifdef __cplusplus
}
#endif /* __cplusplus */

#endif /* __WTAP_H__ */

/*
 * Editor modelines  -  https://www.wireshark.org/tools/modelines.html
 *
 * Local variables:
 * c-basic-offset: 4
 * tab-width: 8
 * indent-tabs-mode: nil
 * End:
 *
 * vi: set shiftwidth=4 tabstop=8 expandtab:
 * :indentSize=4:tabSize=8:noTabs=true:
 */