tftp_enable)returnNF_ACCEPT;#endiftfh = skb_header_pointer(skb, protoff +sizeof(struct udphdr),sizeof(_tftph), &_tftph);if(tfh ==NULL)returnNF_ACCEPT;switch(ntohs(tfh->opcode)) {caseTFTP_OPCODE_READ:caseTFTP_OPCODE_WRITE:/* RRQ and WRQ works the same way */nf_ct_dump_tuple(&...