+/*
+ * Copyright (c) 1999 Kungliga Tekniska Högskolan
+ * (Royal Institute of Technology, Stockholm, Sweden).
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * This product includes software developed by the Kungliga Tekniska
+ * Högskolan and its contributors.
+ *
+ * 4. Neither the name of the Institute nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+/* $Id: inet_ntop.c,v 1.1 1999-10-30 07:53:39 itojun Exp $ */
+
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+
+/*
+ *
+ */
+
+#ifndef INET_ADDRSTRLEN
+#define INET_ADDRSTRLEN 16
+#endif
+
+static const char *
+inet_ntop_v4 (const void *src, char *dst, size_t size)
+{
+ const char digits[] = "0123456789";
+ int i;
+ struct in_addr *addr = (struct in_addr *)src;
+ u_long a = ntohl(addr->s_addr);
+ const char *orig_dst = dst;
+
+ if (size < INET_ADDRSTRLEN) {
+ errno = ENOSPC;
+ return NULL;
+ }
+ for (i = 0; i < 4; ++i) {
+ int n = (a >> (24 - i * 8)) & 0xFF;
+ int non_zerop = 0;
+
+ if (non_zerop || n / 100 > 0) {
+ *dst++ = digits[n / 100];
+ n %= 100;
+ non_zerop = 1;
+ }
+ if (non_zerop || n / 10 > 0) {
+ *dst++ = digits[n / 10];
+ n %= 10;
+ non_zerop = 1;
+ }
+ *dst++ = digits[n];
+ if (i != 3)
+ *dst++ = '.';
+ }
+ *dst++ = '\0';
+ return orig_dst;
+}
+
+const char *
+inet_ntop(int af, const void *src, char *dst, size_t size)
+{
+ switch (af) {
+ case AF_INET :
+ return inet_ntop_v4 (src, dst, size);
+ default :
+ errno = EAFNOSUPPORT;
+ return NULL;
+ }
+}
projects / tcpdump / commitdiff
