3 * Wireshark - Network traffic analyzer
4 * By Gerald Combs <gerald@wireshark.org>
5 * Copyright 1998 Gerald Combs
7 * SPDX-License-Identifier: GPL-2.0-or-later
10 #ifndef __WS_INET_ADDR_H__
11 #define __WS_INET_ADDR_H__
13 #include "ws_symbol_export.h"
14 #include "ws_attributes.h"
17 #include "inet_ipv4.h"
18 #include "inet_ipv6.h"
21 * These are the values specified by RFC 2133 and its successors for
22 * INET_ADDRSTRLEN and INET6_ADDRSTRLEN.
24 * On UN*X systems, INET_ADDRSTRLEN and INET6_ADDRSTRLEN are defined
25 * to the values from RFC 2133 and its successors.
27 * However, on Windows:
29 * There are APIs RtlIpv4AddressToStringEx(), which converts an
30 * IPv4 address *and transport-layer port* to the address in the
31 * standard text form, followed by a colon and the port number,
32 * and RtlIpv6AddressToStringEx(), which converts an IPv6 address
33 * *and scope ID and transport-layer port* to the address in the
34 * standard text form, followed by a percent sign and the scope
35 * ID (with the address and scope ID in square brackets), followed
36 * by a colon and the port number.
38 * Instead of defining INET_ADDRSTRLEN_EX as 22 and INET6_ADDRSTRLEN_EX
39 * as 65, and saying *those* were the buffer sizes to use for
40 * RtlIpv4AddressToStringEx() and RtlIpv6AddressToStringEx(), they
41 * defined INET_ADDRSTRLEN to be 22 and INET6_ADDRSTRLEN to be 65 - and
42 * recommend using those as the size for the buffers passed to
43 * RtlIpv4AddressToStringEx() and RtlIpv6AddressToStringEx().
45 * At least they document inet_ntop() as requiring a 16-byte or larger
46 * buffer for IPv4 addresses and a 46-byte or larger buffer for
47 * IPv6 addresses. For this reason, use hard-coded numeric constants rather than
48 * INET_ADDRSTRLEN and INET6_ADDRSTRLEN.
50 #define WS_INET_ADDRSTRLEN 16
51 #define WS_INET6_ADDRSTRLEN 46
54 * To check for errors set errno to zero before calling ws_inet_ntop{4,6}.
55 * ENOSPC is set if the result exceeds the given buffer size.
57 WS_DLL_PUBLIC WS_RETNONNULL const gchar *
58 ws_inet_ntop4(gconstpointer src, gchar *dst, guint dst_size);
60 WS_DLL_PUBLIC WS_RETNONNULL const gchar *
61 ws_inet_ntop6(gconstpointer src, gchar *dst, guint dst_size);
63 WS_DLL_PUBLIC gboolean
64 ws_inet_pton4(const gchar *src, ws_in4_addr *dst);
66 WS_DLL_PUBLIC gboolean
67 ws_inet_pton6(const gchar *src, ws_in6_addr *dst);