1 files changed, 99 insertions, 0 deletions

diff --git a/src/lib/libc/net/inet_network.c b/src/lib/libc/net/inet_network.c
new file mode 100644
index 0000000000..35105fa75a
--- /dev/null
+++ b/src/lib/libc/net/inet_network.c
@@ -0,0 +1,99 @@
+/*      $NetBSD: inet_network.c,v 1.4 1995/02/25 06:20:45 cgd Exp $     */
+
+/*
+ * Copyright (c) 1983, 1993
+ *      The Regents of the University of California.  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 University of
+ *      California, Berkeley and its contributors.
+ * 4. Neither the name of the University 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 REGENTS 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 REGENTS 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.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+#if 0
+static char sccsid[] = "@(#)inet_network.c      8.1 (Berkeley) 6/4/93";
+#else
+static char rcsid[] = "$NetBSD: inet_network.c,v 1.4 1995/02/25 06:20:45 cgd Exp $";
+#endif
+#endif /* LIBC_SCCS and not lint */
+
+#include <sys/types.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <ctype.h>
+
+/*
+ * Internet network address interpretation routine.
+ * The library routines call this routine to interpret
+ * network numbers.
+ */
+u_long
+inet_network(cp)
+        register const char *cp;
+{
+        register u_long val, base, n;
+        register char c;
+        u_long parts[4], *pp = parts;
+        register int i;
+
+again:
+        val = 0; base = 10;
+        if (*cp == '0')
+                base = 8, cp++;
+        if (*cp == 'x' || *cp == 'X')
+                base = 16, cp++;
+        while (c = *cp) {
+                if (isdigit(c)) {
+                        val = (val * base) + (c - '0');
+                        cp++;
+                        continue;
+                }
+                if (base == 16 && isxdigit(c)) {
+                        val = (val << 4) + (c + 10 - (islower(c) ? 'a' : 'A'));
+                        cp++;
+                        continue;
+                }
+                break;
+        }
+        if (*cp == '.') {
+                if (pp >= parts + 4)
+                        return (INADDR_NONE);
+                *pp++ = val, cp++;
+                goto again;
+        }
+        if (*cp && !isspace(*cp))
+                return (INADDR_NONE);
+        *pp++ = val;
+        n = pp - parts;
+        if (n > 4)
+                return (INADDR_NONE);
+        for (val = 0, i = 0; i < n; i++) {
+                val <<= 8;
+                val |= parts[i] & 0xff;
+        }
+        return (val);
+}