/* inet_ntop.c -- convert IPv4 and IPv6 addresses from binary to text form
- Copyright (c) 2005, 2006 Free Software Foundation, Inc.
+
+ Copyright (C) 2005-2006, 2008-2014 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software Foundation,
- Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
+ along with this program; if not, see <http://www.gnu.org/licenses/>. */
/*
* Copyright (c) 1996-1999 by Internet Software Consortium.
* SOFTWARE.
*/
-#ifdef HAVE_CONFIG_H
-# include <config.h>
-#endif
+#include <config.h>
/* Specification. */
-#include "inet_ntop.h"
+#include <arpa/inet.h>
-#include <stdio.h>
-#include <string.h>
-#include <errno.h>
-
-#ifndef EAFNOSUPPORT
-# define EAFNOSUPPORT EINVAL
+/* Use this to suppress gcc's "...may be used before initialized" warnings.
+ Beware: The Code argument must not contain commas. */
+#ifndef IF_LINT
+# ifdef lint
+# define IF_LINT(Code) Code
+# else
+# define IF_LINT(Code) /* empty */
+# endif
#endif
-#define NS_IN6ADDRSZ 16
-#define NS_INT16SZ 2
+#if HAVE_DECL_INET_NTOP
+
+# undef inet_ntop
+
+const char *
+rpl_inet_ntop (int af, const void *restrict src,
+ char *restrict dst, socklen_t cnt)
+{
+ return inet_ntop (af, src, dst, cnt);
+}
+
+#else
+
+# include <stdio.h>
+# include <string.h>
+# include <errno.h>
+
+# define NS_IN6ADDRSZ 16
+# define NS_INT16SZ 2
/*
* WARNING: Don't even consider trying to compile this on a system where
* sizeof(int) < 4. sizeof(int) > 4 is fine; all the world's not a VAX.
*/
-typedef int verify_int_size[2 * sizeof (int) - 7];
+typedef int verify_int_size[4 <= sizeof (int) ? 1 : -1];
static const char *inet_ntop4 (const unsigned char *src, char *dst, socklen_t size);
-#if HAVE_IPV6
+# if HAVE_IPV6
static const char *inet_ntop6 (const unsigned char *src, char *dst, socklen_t size);
-#endif
+# endif
/* char *
* inet_ntop(af, src, dst, size)
- * convert a network format address to presentation format.
+ * convert a network format address to presentation format.
* return:
- * pointer to presentation format address (`dst'), or NULL (see errno).
+ * pointer to presentation format address ('dst'), or NULL (see errno).
* author:
- * Paul Vixie, 1996.
+ * Paul Vixie, 1996.
*/
const char *
inet_ntop (int af, const void *restrict src,
- char *restrict dst, socklen_t cnt)
+ char *restrict dst, socklen_t cnt)
{
switch (af)
{
+# if HAVE_IPV4
case AF_INET:
return (inet_ntop4 (src, dst, cnt));
+# endif
-#if HAVE_IPV6
+# if HAVE_IPV6
case AF_INET6:
return (inet_ntop6 (src, dst, cnt));
-#endif
+# endif
default:
errno = EAFNOSUPPORT;
/* const char *
* inet_ntop4(src, dst, size)
- * format an IPv4 address
+ * format an IPv4 address
* return:
- * `dst' (as a const)
+ * 'dst' (as a const)
* notes:
- * (1) uses no statics
- * (2) takes a u_char* not an in_addr as input
+ * (1) uses no statics
+ * (2) takes a u_char* not an in_addr as input
* author:
- * Paul Vixie, 1996.
+ * Paul Vixie, 1996.
*/
static const char *
inet_ntop4 (const unsigned char *src, char *dst, socklen_t size)
return strcpy (dst, tmp);
}
-#if HAVE_IPV6
+# if HAVE_IPV6
/* const char *
* inet_ntop6(src, dst, size)
- * convert IPv6 binary address into presentation (printable) format
+ * convert IPv6 binary address into presentation (printable) format
* author:
- * Paul Vixie, 1996.
+ * Paul Vixie, 1996.
*/
static const char *
inet_ntop6 (const unsigned char *src, char *dst, socklen_t size)
words[i / 2] = (src[i] << 8) | src[i + 1];
best.base = -1;
cur.base = -1;
+ IF_LINT(best.len = 0);
+ IF_LINT(cur.len = 0);
for (i = 0; i < (NS_IN6ADDRSZ / NS_INT16SZ); i++)
{
if (words[i] == 0)
- {
- if (cur.base == -1)
- cur.base = i, cur.len = 1;
- else
- cur.len++;
- }
+ {
+ if (cur.base == -1)
+ cur.base = i, cur.len = 1;
+ else
+ cur.len++;
+ }
else
- {
- if (cur.base != -1)
- {
- if (best.base == -1 || cur.len > best.len)
- best = cur;
- cur.base = -1;
- }
- }
+ {
+ if (cur.base != -1)
+ {
+ if (best.base == -1 || cur.len > best.len)
+ best = cur;
+ cur.base = -1;
+ }
+ }
}
if (cur.base != -1)
{
if (best.base == -1 || cur.len > best.len)
- best = cur;
+ best = cur;
}
if (best.base != -1 && best.len < 2)
best.base = -1;
{
/* Are we inside the best run of 0x00's? */
if (best.base != -1 && i >= best.base && i < (best.base + best.len))
- {
- if (i == best.base)
- *tp++ = ':';
- continue;
- }
+ {
+ if (i == best.base)
+ *tp++ = ':';
+ continue;
+ }
/* Are we following an initial run of 0x00s or any real hex? */
if (i != 0)
- *tp++ = ':';
+ *tp++ = ':';
/* Is this address an encapsulated IPv4? */
if (i == 6 && best.base == 0 &&
- (best.len == 6 || (best.len == 5 && words[5] == 0xffff)))
- {
- if (!inet_ntop4 (src + 12, tp, sizeof tmp - (tp - tmp)))
- return (NULL);
- tp += strlen (tp);
- break;
- }
+ (best.len == 6 || (best.len == 5 && words[5] == 0xffff)))
+ {
+ if (!inet_ntop4 (src + 12, tp, sizeof tmp - (tp - tmp)))
+ return (NULL);
+ tp += strlen (tp);
+ break;
+ }
{
- int len = sprintf (tp, "%x", words[i]);
- if (len < 0)
- return NULL;
- tp += len;
+ int len = sprintf (tp, "%x", words[i]);
+ if (len < 0)
+ return NULL;
+ tp += len;
}
}
/* Was it a trailing run of 0x00's? */
return strcpy (dst, tmp);
}
+# endif
+
#endif
projects / gnulib.git / blobdiff