Mine

# setter
#extern void nfct_set_attr(struct nf_conntrack *ct,
#			  const enum nf_conntrack_attr type,
#			  void *value);
#
#extern void nfct_set_attr_u8(struct nf_conntrack *ct,
#			     const enum nf_conntrack_attr type,
#			     u_int8_t value);
#
#extern void nfct_set_attr_u16(struct nf_conntrack *ct,
#			      const enum nf_conntrack_attr type,
#			      u_int16_t value);
#
#extern void nfct_set_attr_u32(struct nf_conntrack *ct,
#			      const enum nf_conntrack_attr type,
#			      u_int32_t value);
#
#
# getter
#extern const void *nfct_get_attr(const struct nf_conntrack *ct,
#				 const enum nf_conntrack_attr type);
#
#extern u_int8_t nfct_get_attr_u8(const struct nf_conntrack *ct,
#				 const enum nf_conntrack_attr type);
#
#extern u_int16_t nfct_get_attr_u16(const struct nf_conntrack *ct,
#				   const enum nf_conntrack_attr type);
#
#extern u_int32_t nfct_get_attr_u32(const struct nf_conntrack *ct,
#				   const enum nf_conntrack_attr type);