wtap-int.h

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#ifndef __WTAP_INT_H__
#define __WTAP_INT_H__
 
#include "wtap.h"
#include <time.h>
 
#ifdef _WIN32
#include <winsock2.h>
#endif
 
#include <wsutil/array.h>
#include <wsutil/file_util.h>
 
#include "wtap_opttypes.h"
 
void wtap_init_file_type_subtypes(void);
 
WS_DLL_PUBLIC
int wtap_fstat(wtap *wth, ws_statb64 *statb, int *err);
 
typedef bool (*subtype_read_func)(struct wtap*, wtap_rec *,
                                  int *, char **, int64_t *);
typedef bool (*subtype_seek_read_func)(struct wtap*, int64_t, wtap_rec *,
                                       int *, char **);
 
struct wtap {
    FILE_T                      fh;                     
    FILE_T                      random_fh;              
    bool                        ispipe;                 
    int                         file_type_subtype;
    unsigned                    snapshot_length;
    GArray                      *shb_hdrs;
    GArray                      *shb_iface_to_global;   
    GArray                      *interface_data;        
    unsigned                    next_interface_data;    
    GArray                      *nrbs;                  
    GArray                      *dsbs;                  
    GArray                      *meta_events;           
    GArray                      *dpibs;                 
    unsigned                    next_dpib_id;           
    char                        *pathname;              
    void                        *priv;                  
    void                        *wslua_data;            
    subtype_read_func           subtype_read;           
    subtype_seek_read_func      subtype_seek_read;      
    void                        (*subtype_sequential_close)(struct wtap*);
    void                        (*subtype_close)(struct wtap*);
    int                         file_encap;    
    int                         file_tsprec;    
    nstime_t                    file_start_ts; 
    wtap_new_ipv4_callback_t    add_new_ipv4;
    wtap_new_ipv6_callback_t    add_new_ipv6;
    wtap_new_secrets_callback_t add_new_secrets;
    GPtrArray                   *fast_seek;
};
 
struct wtap_dumper;
 
/*
 * This could either be a FILE * or a handle used by code that writes
 * a compressed file.
 */
typedef void *WFILE_T;
 
typedef bool (*subtype_add_idb_func)(struct wtap_dumper*, wtap_block_t,
                                         int *, char **);
 
typedef bool (*subtype_write_func)(struct wtap_dumper*, const wtap_rec*,
                                   int*, char**);
typedef bool (*subtype_finish_func)(struct wtap_dumper*, int*, char**);
 
struct wtap_dumper {
    WFILE_T                 fh;
    int                     file_type_subtype;
    int                     snaplen;
    int                     file_encap;      /* per-file, for those
                                              * file formats that have
                                              * per-file encapsulation
                                              * types rather than per-packet
                                              * encapsulation types
                                              */
    wtap_compression_type   compression_type;
    bool                    needs_reload;    /* true if the file requires re-loading after saving with wtap */
    int64_t                 bytes_dumped;
 
    void                    *priv;           /* this one holds per-file state and is free'd automatically by wtap_dump_close() */
    void                    *wslua_data;     /* this one holds wslua state info and is not free'd */
 
    subtype_add_idb_func    subtype_add_idb; /* add an IDB, writing it as necessary */
    subtype_write_func      subtype_write;   /* write out a record */
    subtype_finish_func     subtype_finish;  /* write out information to finish writing file */
 
    addrinfo_lists_t        *addrinfo_lists; 
    GArray                  *shb_hdrs;
    const GArray            *shb_iface_to_global; 
    GArray                  *interface_data; 
    GArray                  *dsbs_initial;   
    /*
     * Additional blocks that might grow as data is being collected.
     * Subtypes should write these blocks before writing new packet blocks.
     */
    const GArray            *nrbs_growing;          
    const GArray            *dsbs_growing;          
    const GArray            *mevs_growing;          
    const GArray            *dpibs_growing;          
    unsigned                nrbs_growing_written;   
    unsigned                dsbs_growing_written;   
    unsigned                mevs_growing_written;   
    unsigned                dpibs_growing_written;   
};
 
WS_DLL_PUBLIC bool wtap_dump_file_write(wtap_dumper *wdh, const void *buf,
    size_t bufsize, int *err);
WS_DLL_PUBLIC int64_t wtap_dump_file_seek(wtap_dumper *wdh, int64_t offset, int whence, int *err);
WS_DLL_PUBLIC int64_t wtap_dump_file_tell(wtap_dumper *wdh, int *err);
 
extern int wtap_num_file_types;
 
/* Macros to byte-swap possibly-unaligned 64-bit, 32-bit and 16-bit quantities;
 * they take a pointer to the quantity, and byte-swap it in place.
 */
#define PBSWAP64(p) \
    {            \
        uint8_t tmp;        \
        tmp = (p)[7];      \
        (p)[7] = (p)[0];   \
        (p)[0] = tmp;      \
        tmp = (p)[6];      \
        (p)[6] = (p)[1];   \
        (p)[1] = tmp;      \
        tmp = (p)[5];      \
        (p)[5] = (p)[2];   \
        (p)[2] = tmp;      \
        tmp = (p)[4];      \
        (p)[4] = (p)[3];   \
        (p)[3] = tmp;      \
    }
#define PBSWAP32(p) \
    {            \
        uint8_t tmp;         \
        tmp = (p)[3];       \
        (p)[3] = (p)[0];    \
        (p)[0] = tmp;       \
        tmp = (p)[2];       \
        (p)[2] = (p)[1];    \
        (p)[1] = tmp;       \
    }
#define PBSWAP16(p) \
    {            \
        uint8_t tmp;        \
        tmp = (p)[1];      \
        (p)[1] = (p)[0];   \
        (p)[0] = tmp;      \
    }
 
/*
 * Read a given number of bytes from a file into a buffer or, if
 * buf is NULL, just discard them.
 *
 * If we succeed, return true.
 *
 * If we get an EOF, return false with *err set to 0, reporting this
 * as an EOF.
 *
 * If we get fewer bytes than the specified number, return false with
 * *err set to WTAP_ERR_SHORT_READ, reporting this as a short read
 * error.
 *
 * If we get a read error, return false with *err and *err_info set
 * appropriately.
 */
WS_DLL_PUBLIC
bool
wtap_read_bytes_or_eof(FILE_T fh, void *buf, unsigned int count, int *err,
    char **err_info);
 
/*
 * Read a given number of bytes from a file into a buffer or, if
 * buf is NULL, just discard them.
 *
 * If we succeed, return true.
 *
 * If we get fewer bytes than the specified number, including getting
 * an EOF, return false with *err set to WTAP_ERR_SHORT_READ, reporting
 * this as a short read error.
 *
 * If we get a read error, return false with *err and *err_info set
 * appropriately.
 */
WS_DLL_PUBLIC
bool
wtap_read_bytes(FILE_T fh, void *buf, unsigned int count, int *err,
    char **err_info);
 
/*
 * Read a given number of bytes from a file into a Buffer, growing the
 * buffer as necessary.
 *
 * This returns an error on a short read, even if the short read hit
 * the EOF immediately.  (The assumption is that each packet has a
 * header followed by raw packet data, and that we've already read the
 * header, so if we get an EOF trying to read the packet data, the file
 * has been cut short, even if the read didn't read any data at all.)
 */
WS_DLL_PUBLIC
bool
wtap_read_bytes_buffer(FILE_T fh, Buffer *buf, unsigned length, int *err,
    char **err_info);
 
/*
 * Implementation of wth->subtype_read that reads the full file contents
 * as a single packet.
 */
bool
wtap_full_file_read(wtap *wth, wtap_rec *rec, int *err, char **err_info,
    int64_t *data_offset);
 
/*
 * Implementation of wth->subtype_seek_read that reads the full file contents
 * as a single packet.
 */
bool
wtap_full_file_seek_read(wtap *wth, int64_t seek_off, wtap_rec *rec,
    int *err, char **err_info);
 
void
wtap_add_idb(wtap *wth, wtap_block_t idb);
 
 void
 wtap_add_dpib(wtap *wth, wtap_block_t dpib);
 
void
wtapng_process_nrb(wtap *wth, wtap_block_t nrb);
 
void
wtapng_process_dsb(wtap *wth, wtap_block_t dsb);
 
void
wtap_register_compatibility_file_subtype_name(const char *old_name,
    const char *new_name);
 
void
wtap_register_backwards_compatibility_lua_name(const char *name, int ft);
 
struct backwards_compatibiliity_lua_name {
    const char *name;
    int ft;
};
 
WS_DLL_PUBLIC
const GArray *get_backwards_compatibility_lua_table(void);
 
GArray* wtap_file_get_shb_for_new_file(wtap *wth);
 
WS_DLL_PUBLIC
void wtap_add_generated_idb(wtap *wth);
 
wtap_block_t wtap_dump_params_generate_idb(const wtap_dump_params *params);
 
wtap_block_t wtap_rec_generate_idb(const wtap_rec *rec);
 
GArray* wtap_file_get_nrb_for_new_file(wtap *wth);
 
#endif /* __WTAP_INT_H__ */
 
/*
 * Editor modelines  -  https://www.wireshark.org/tools/modelines.html
 *
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 *
 * vi: set shiftwidth=4 tabstop=8 expandtab:
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