include/linux/netfilter/ipset/pfxlen.h

   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 #endif /*_PFXLEN_H */