--- /dev/null
+#ifndef _NF_CONNTRACK_TFTP_H
+#define _NF_CONNTRACK_TFTP_H
+
+#define TFTP_PORT 69
+
+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
+
+extern unsigned int (*nf_nat_tftp_hook)(struct sk_buff **pskb,
+ enum ip_conntrack_info ctinfo,
+ struct nf_conntrack_expect *exp);
+
+#endif /* _NF_CONNTRACK_TFTP_H */