tvbuff-int.h

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#pragma once
struct tvbuff;
 
struct tvb_ops {
    size_t tvb_size; 
    void (*tvb_free)(struct tvbuff *tvb);
 
    unsigned (*tvb_offset)(const struct tvbuff *tvb, unsigned counter);
 
    const uint8_t *(*tvb_get_ptr)(struct tvbuff *tvb, unsigned abs_offset, unsigned abs_length);
 
    void *(*tvb_memcpy)(struct tvbuff *tvb, void *target, unsigned offset, unsigned length);
 
    bool (*tvb_find_uint8)(tvbuff_t *tvb, unsigned abs_offset, unsigned limit, uint8_t needle, unsigned *found_offset);
 
    bool (*tvb_ws_mempbrk_pattern_uint8)(tvbuff_t *tvb, unsigned abs_offset, unsigned limit, const ws_mempbrk_pattern* pattern, unsigned *found_offset, unsigned char *found_needle);
 
    tvbuff_t *(*tvb_clone)(tvbuff_t *tvb, unsigned abs_offset, unsigned abs_length);
};
 
/*
 * Tvbuff flags.
 */
#define TVBUFF_FRAGMENT   0x00000001 
#define TVBUFF_RAW_OFFSET 0x00000002 
struct tvbuff {
    /* Doubly linked list pointers */
    tvbuff_t*              next;              
    /* Record-keeping */
    const struct tvb_ops*  ops;              
    bool                   initialized;      
    unsigned               flags;            
    struct tvbuff*         ds_tvb;           
    const uint8_t*         real_data;
 
    unsigned               length;
 
    unsigned               reported_length;
 
    unsigned               contained_length;
 
    unsigned               raw_offset;
};
 
tvbuff_t *tvb_new(const struct tvb_ops *ops);
 
tvbuff_t *tvb_new_proxy(tvbuff_t *backing);
 
void tvb_add_to_chain(tvbuff_t *parent, tvbuff_t *child);
 
unsigned tvb_offset_from_real_beginning_counter(const tvbuff_t *tvb, const unsigned counter);
 
void tvb_validate_offset_length(const tvbuff_t *tvb, const unsigned offset, const unsigned length);
 
void tvb_validate_offset_and_remaining(const tvbuff_t *tvb, const unsigned offset, unsigned *rem_len);
 
void tvb_check_offset_length(const tvbuff_t *tvb, const int offset, int const length_val, unsigned *offset_ptr, unsigned *length_ptr);