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#ifndef __BPF_KFUNCS__
#define __BPF_KFUNCS__

/* Description
 *  Initializes an skb-type dynptr
 * Returns
 *  Error code
 */
extern int bpf_dynptr_from_skb(struct __sk_buff *skb, __u64 flags,
    struct bpf_dynptr *ptr__uninit) __ksym;

/* Description
 *  Initializes an xdp-type dynptr
 * Returns
 *  Error code
 */
extern int bpf_dynptr_from_xdp(struct xdp_md *xdp, __u64 flags,
			       struct bpf_dynptr *ptr__uninit) __ksym;

/* Description
 *  Obtain a read-only pointer to the dynptr's data
 * Returns
 *  Either a direct pointer to the dynptr data or a pointer to the user-provided
 *  buffer if unable to obtain a direct pointer
 */
extern void *bpf_dynptr_slice(const struct bpf_dynptr *ptr, __u32 offset,
			      void *buffer, __u32 buffer__szk) __ksym;

/* Description
 *  Obtain a read-write pointer to the dynptr's data
 * Returns
 *  Either a direct pointer to the dynptr data or a pointer to the user-provided
 *  buffer if unable to obtain a direct pointer
 */
extern void *bpf_dynptr_slice_rdwr(const struct bpf_dynptr *ptr, __u32 offset,
			      void *buffer, __u32 buffer__szk) __ksym;

#endif