wsutil/inet_cidr.h

   1 /** @file
   2  * Definitions of IPv4 address-and-mask structure, which is what an
   3  * FT_IPV4 value is (even if there's no mask in a packet, those
   4  * values can be compared against an address+mask in a filter
   5  * expression).
   6  *
   7  * Gilbert Ramirez <gram@alumni.rice.edu>
   8  *
   9  * Wireshark - Network traffic analyzer
  10  * By Gerald Combs <gerald@wireshark.org>
  11  * Copyright 1998 Gerald Combs
  12  *
  13  * SPDX-License-Identifier: GPL-2.0-or-later
  14  */
  15
  16 #ifndef __IPV4_H__
  17 #define __IPV4_H__
  18
  19 #include <wireshark.h>
  20 #include <wsutil/inet_addr.h>
  21
  22 typedef struct {
  23         uint32_t        addr;   /* stored in host order */
  24         uint32_t        nmask;  /* stored in host order */
  25 } ipv4_addr_and_mask;
  26
  27 typedef struct {
  28         ws_in6_addr addr;
  29         uint32_t prefix;
  30 } ipv6_addr_and_prefix;
  31
  32 /*
  33  ********** IPv4 *********
  34  */
  35
  36 /**
  37 * Returns the IPv4 subnet mask of the specified length
  38 *
  39 * @param mask_length the number of bits in the subnet mask (max of 32)
  40 * @return the subnet mask of the specified length
  41 */
  42 WS_DLL_PUBLIC
  43 uint32_t
  44 ws_ipv4_get_subnet_mask(const uint32_t mask_length);
  45
  46 WS_DLL_PUBLIC
  47 void
  48 ws_ipv4_addr_and_mask_init(ipv4_addr_and_mask *dst, ws_in4_addr src_addr, int src_bits);
  49
  50 WS_DLL_PUBLIC
  51 bool
  52 ws_ipv4_addr_and_mask_contains(const ipv4_addr_and_mask *ipv4, const ws_in4_addr *addr);
  53
  54 /*
  55  ********** IPv6 *********
  56  */
  57
  58 WS_DLL_PUBLIC
  59 bool
  60 ws_ipv6_addr_and_prefix_contains(const ipv6_addr_and_prefix *ipv6, const ws_in6_addr *addr);
  61
  62 #endif