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Linux/include/linux/netfilter/ipset/pfxlen.h

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  1 #ifndef _PFXLEN_H
  2 #define _PFXLEN_H
  3 
  4 #include <asm/byteorder.h>
  5 #include <linux/netfilter.h>
  6 #include <net/tcp.h>
  7 
  8 /* Prefixlen maps, by Jan Engelhardt  */
  9 extern const union nf_inet_addr ip_set_netmask_map[];
 10 extern const union nf_inet_addr ip_set_hostmask_map[];
 11 
 12 static inline __be32
 13 ip_set_netmask(u8 pfxlen)
 14 {
 15         return ip_set_netmask_map[pfxlen].ip;
 16 }
 17 
 18 static inline const __be32 *
 19 ip_set_netmask6(u8 pfxlen)
 20 {
 21         return &ip_set_netmask_map[pfxlen].ip6[0];
 22 }
 23 
 24 static inline u32
 25 ip_set_hostmask(u8 pfxlen)
 26 {
 27         return (__force u32) ip_set_hostmask_map[pfxlen].ip;
 28 }
 29 
 30 static inline const __be32 *
 31 ip_set_hostmask6(u8 pfxlen)
 32 {
 33         return &ip_set_hostmask_map[pfxlen].ip6[0];
 34 }
 35 
 36 extern u32 ip_set_range_to_cidr(u32 from, u32 to, u8 *cidr);
 37 
 38 #define ip_set_mask_from_to(from, to, cidr)     \
 39 do {                                            \
 40         from &= ip_set_hostmask(cidr);          \
 41         to = from | ~ip_set_hostmask(cidr);     \
 42 } while (0)
 43 
 44 static inline void
 45 ip6_netmask(union nf_inet_addr *ip, u8 prefix)
 46 {
 47         ip->ip6[0] &= ip_set_netmask6(prefix)[0];
 48         ip->ip6[1] &= ip_set_netmask6(prefix)[1];
 49         ip->ip6[2] &= ip_set_netmask6(prefix)[2];
 50         ip->ip6[3] &= ip_set_netmask6(prefix)[3];
 51 }
 52 
 53 #endif /*_PFXLEN_H */
 54 

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