1 /* $NetBSD: cidr_match.h,v 1.1.1.1 2009/06/23 10:08:59 tron Exp $ */ 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 67