release/src-rt-6.x/linux/linux-2.6/include/linux/netfilter_ipv4/ip_set_ipmap.h

   1 #ifndef __IP_SET_IPMAP_H
   2 #define __IP_SET_IPMAP_H
   3
   4 #include <linux/netfilter_ipv4/ip_set.h>
   5 #include <linux/netfilter_ipv4/ip_set_bitmaps.h>
   6
   7 #define SETTYPE_NAME            "ipmap"
   8
   9 struct ip_set_ipmap {
  10         void *members;                  /* the ipmap proper */
  11         ip_set_ip_t first_ip;           /* host byte order, included in range */
  12         ip_set_ip_t last_ip;            /* host byte order, included in range */
  13         ip_set_ip_t netmask;            /* subnet netmask */
  14         ip_set_ip_t sizeid;             /* size of set in IPs */
  15         ip_set_ip_t hosts;              /* number of hosts in a subnet */
  16         u_int32_t size;                 /* size of the ipmap proper */
  17 };
  18
  19 struct ip_set_req_ipmap_create {
  20         ip_set_ip_t from;
  21         ip_set_ip_t to;
  22         ip_set_ip_t netmask;
  23 };
  24
  25 struct ip_set_req_ipmap {
  26         ip_set_ip_t ip;
  27 };
  28
  29 static inline unsigned int
  30 mask_to_bits(ip_set_ip_t mask)
  31 {
  32         unsigned int bits = 32;
  33         ip_set_ip_t maskaddr;
  34
  35         if (mask == 0xFFFFFFFF)
  36                 return bits;
  37
  38         maskaddr = 0xFFFFFFFE;
  39         while (--bits > 0 && maskaddr != mask)
  40                 maskaddr <<= 1;
  41
  42         return bits;
  43 }
  44
  45 static inline ip_set_ip_t
  46 range_to_mask(ip_set_ip_t from, ip_set_ip_t to, unsigned int *bits)
  47 {
  48         ip_set_ip_t mask = 0xFFFFFFFE;
  49
  50         *bits = 32;
  51         while (--(*bits) > 0 && mask && (to & mask) != from)
  52                 mask <<= 1;
  53
  54         return mask;
  55 }
  56
  57 #endif /* __IP_SET_IPMAP_H */