1 #ifndef _NF_NAT_H 2 #define _NF_NAT_H 3 #include <linux/netfilter_ipv4.h> 4 #include <net/netfilter/nf_conntrack_tuple.h> 5 6 #define NF_NAT_MAPPING_TYPE_MAX_NAMELEN 16 7 8 enum nf_nat_manip_type 9 { 10 IP_NAT_MANIP_SRC, 11 IP_NAT_MANIP_DST 12 }; 13 14 /* SRC manip occurs POST_ROUTING or LOCAL_IN */ 15 #define HOOK2MANIP(hooknum) ((hooknum) != NF_INET_POST_ROUTING && \ 16 (hooknum) != NF_INET_LOCAL_IN) 17 18 #define IP_NAT_RANGE_MAP_IPS 1 19 #define IP_NAT_RANGE_PROTO_SPECIFIED 2 20 #define IP_NAT_RANGE_PROTO_RANDOM 4 21 #define IP_NAT_RANGE_PERSISTENT 8 22 23 /* NAT sequence number modifications */ 24 struct nf_nat_seq { 25 /* position of the last TCP sequence number modification (if any) */ 26 u_int32_t correction_pos; 27 28 /* sequence number offset before and after last modification */ 29 int16_t offset_before, offset_after; 30 }; 31 32 /* Single range specification. */ 33 struct nf_nat_range 34 { 35 /* Set to OR of flags above. */ 36 unsigned int flags; 37 38 /* Inclusive: network order. */ 39 __be32 min_ip, max_ip; 40 41 /* Inclusive: network order */ 42 union nf_conntrack_man_proto min, max; 43 }; 44 45 /* For backwards compat: don't use in modern code. */ 46 struct nf_nat_multi_range_compat 47 { 48 unsigned int rangesize; /* Must be 1. */ 49 50 /* hangs off end. */ 51 struct nf_nat_range range[1]; 52 }; 53 54 #define nf_nat_multi_range nf_nat_multi_range_compat 55 #endif 56