external/ibm-public/postfix/dist/src/util/cidr_match.h

   1 /*      $NetBSD$        */
   2
   3 #ifndef _CIDR_MATCH_H_INCLUDED_
   4 #define _CIDR_MATCH_H_INCLUDED_
   5
   6 /*++
   7 /* NAME
   8 /*      dict_cidr 3h
   9 /* SUMMARY
  10 /*      CIDR-style pattern matching
  11 /* SYNOPSIS
  12 /*      #include <cidr_match.h>
  13 /* DESCRIPTION
  14 /* .nf
  15
  16  /*
  17   * System library.
  18   */
  19 #include <limits.h>                     /* CHAR_BIT */
  20
  21  /*
  22   * Utility library.
  23   */
  24 #include <myaddrinfo.h>                 /* MAI_V6ADDR_BYTES etc. */
  25 #include <vstring.h>
  26
  27  /*
  28   * External interface.
  29   *
  30   * Address length is protocol dependent. Find out how large our address byte
  31   * strings should be.
  32   */
  33 #ifdef HAS_IPV6
  34 # define CIDR_MATCH_ABYTES      MAI_V6ADDR_BYTES
  35 #else
  36 # define CIDR_MATCH_ABYTES      MAI_V4ADDR_BYTES
  37 #endif
  38
  39  /*
  40   * Each parsed CIDR pattern can be member of a linked list.
  41   */
  42 typedef struct CIDR_MATCH {
  43     unsigned char net_bytes[CIDR_MATCH_ABYTES]; /* network portion */
  44     unsigned char mask_bytes[CIDR_MATCH_ABYTES];        /* network mask */
  45     unsigned char addr_family;          /* AF_XXX */
  46     unsigned char addr_byte_count;      /* typically, 4 or 16 */
  47     unsigned char addr_bit_count;       /* optimization */
  48     unsigned char mask_shift;           /* optimization */
  49     struct CIDR_MATCH *next;            /* next entry */
  50 } CIDR_MATCH;
  51
  52 extern VSTRING *cidr_match_parse(CIDR_MATCH *, char *, VSTRING *);
  53 extern CIDR_MATCH *cidr_match_execute(CIDR_MATCH *, const char *);
  54
  55 /* LICENSE
  56 /* .ad
  57 /* .fi
  58 /*      The Secure Mailer license must be distributed with this software.
  59 /* AUTHOR(S)
  60 /*      Wietse Venema
  61 /*      IBM T.J. Watson Research
  62 /*      P.O. Box 704
  63 /*      Yorktown Heights, NY 10598, USA
  64 /*--*/
  65
  66 #endif