/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _NF_CONNTRACK_TFTP_H
#define _NF_CONNTRACK_TFTP_H

#define TFTP_PORT 69

#include <linux/netfilter.h>
#include <linux/skbuff.h>
#include <linux/types.h>
#include <net/netfilter/nf_conntrack_expect.h>

struct tftphdr {
        __be16 opcode;
};

#define TFTP_OPCODE_READ        1
#define TFTP_OPCODE_WRITE       2
#define TFTP_OPCODE_DATA        3
#define TFTP_OPCODE_ACK         4
#define TFTP_OPCODE_ERROR       5

typedef unsigned int
nf_nat_tftp_hook_fn(struct sk_buff *skb,
                    enum ip_conntrack_info ctinfo,
                    struct nf_conntrack_expect *exp);

extern nf_nat_tftp_hook_fn __rcu *nf_nat_tftp_hook;

#endif /* _NF_CONNTRACK_TFTP_H */