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/* inet_addr.c
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "config.h"
#include "inet_addr.h"
#include <errno.h>
#include <string.h>
#ifdef HAVE_ARPA_INET_H
#include <arpa/inet.h>
#endif
#ifdef HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif
#include <sys/types.h>
#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h> /* needed to define AF_ values on UNIX */
#endif
#ifdef _WIN32
#include <Ws2tcpip.h> /* indirectly defines AF_ values on Windows */
#define _NTOP_SRC_CAST_ (PVOID)
#else
#define _NTOP_SRC_CAST_
#endif
/*
* We assume and require an inet_pton/inet_ntop that supports AF_INET
* and AF_INET6.
*/
static inline gboolean
_inet_pton(int af, const gchar *src, gpointer dst)
{
gint ret = inet_pton(af, src, dst);
if (G_UNLIKELY(ret < 0)) {
/* EAFNOSUPPORT */
if (af == AF_INET) {
memset(dst, 0, sizeof(struct in_addr));
g_critical("ws_inet_pton4: EAFNOSUPPORT");
}
else if (af == AF_INET6) {
memset(dst, 0, sizeof(struct in6_addr));
g_critical("ws_inet_pton6: EAFNOSUPPORT");
}
else {
g_assert(0);
}
errno = EAFNOSUPPORT;
}
return ret == 1;
}
static inline const gchar *
_inet_ntop(int af, gconstpointer src, gchar *dst, guint dst_size)
{
const gchar *ret = inet_ntop(af, _NTOP_SRC_CAST_ src, dst, dst_size);
if (G_UNLIKELY(ret == NULL)) {
int saved_errno = errno;
gchar *errmsg = "<<ERROR>>";
switch (errno) {
case EAFNOSUPPORT:
errmsg = "<<EAFNOSUPPORT>>";
g_critical("ws_inet_ntop: EAFNOSUPPORT");
break;
case ENOSPC:
errmsg = "<<ENOSPC>>";
break;
default:
break;
}
/* set result to something that can't be confused with a valid conversion */
g_strlcpy(dst, errmsg, dst_size);
/* set errno for caller */
errno = saved_errno;
}
return dst;
}
const gchar *
ws_inet_ntop4(gconstpointer src, gchar *dst, guint dst_size)
{
return _inet_ntop(AF_INET, src, dst, dst_size);
}
gboolean
ws_inet_pton4(const gchar *src, guint32 *dst)
{
return _inet_pton(AF_INET, src, dst);
}
const gchar *
ws_inet_ntop6(gconstpointer src, gchar *dst, guint dst_size)
{
return _inet_ntop(AF_INET6, src, dst, dst_size);
}
gboolean
ws_inet_pton6(const gchar *src, ws_in6_addr *dst)
{
return _inet_pton(AF_INET6, src, dst);
}
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