1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _NF_CONNTRACK_TFTP_H
3 #define _NF_CONNTRACK_TFTP_H
4 
5 #define TFTP_PORT 69
6 
7 #include <linux/netfilter.h>
8 #include <linux/skbuff.h>
9 #include <linux/types.h>
10 #include <net/netfilter/nf_conntrack_expect.h>
11 
12 struct tftphdr {
13 	__be16 opcode;
14 };
15 
16 #define TFTP_OPCODE_READ	1
17 #define TFTP_OPCODE_WRITE	2
18 #define TFTP_OPCODE_DATA	3
19 #define TFTP_OPCODE_ACK		4
20 #define TFTP_OPCODE_ERROR	5
21 
22 extern unsigned int (*nf_nat_tftp_hook)(struct sk_buff *skb,
23 				        enum ip_conntrack_info ctinfo,
24 				        struct nf_conntrack_expect *exp);
25 
26 #endif /* _NF_CONNTRACK_TFTP_H */
27