1 files changed, 57 insertions, 25 deletions

diff --git a/src/lib/libc/net/inet_addr.c b/src/lib/libc/net/inet_addr.c
index 99a6f66ad2..ef8ee4963b 100644
--- a/src/lib/libc/net/inet_addr.c
+++ b/src/lib/libc/net/inet_addr.c
@@ -1,7 +1,11 @@
+/*      $OpenBSD: inet_addr.c,v 1.4 1997/03/13 19:07:29 downsj Exp $    */
+
 /*
+ * ++Copyright++ 1983, 1990, 1993
+ * -
  * Copyright (c) 1983, 1990, 1993
- *      The Regents of the University of California.  All rights reserved.
- *
+ *    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:
@@ -12,12 +16,12 @@
  *    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.
+ *      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
@@ -29,12 +33,38 @@
  * 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.
+ * -
+ * Portions Copyright (c) 1993 by Digital Equipment Corporation.
+ * 
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies, and that
+ * the name of Digital Equipment Corporation not be used in advertising or
+ * publicity pertaining to distribution of the document or software without
+ * specific, written prior permission.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL
+ * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS.   IN NO EVENT SHALL DIGITAL EQUIPMENT
+ * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
+ * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
+ * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
+ * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
+ * SOFTWARE.
+ * -
+ * --Copyright--
  */
 
 #if defined(LIBC_SCCS) && !defined(lint)
-static char rcsid[] = "$OpenBSD: inet_addr.c,v 1.3 1996/08/19 08:29:08 tholo Exp $";
+#if 0
+static char sccsid[] = "@(#)inet_addr.c 8.1 (Berkeley) 6/17/93";
+static char rcsid[] = "$From: inet_addr.c,v 8.5 1996/08/05 08:31:35 vixie Exp $";
+#else
+static char rcsid[] = "$OpenBSD: inet_addr.c,v 1.4 1997/03/13 19:07:29 downsj Exp $";
+#endif
 #endif /* LIBC_SCCS and not lint */
 
+#include <sys/types.h>
 #include <sys/param.h>
 #include <netinet/in.h>
 #include <arpa/inet.h>
@@ -73,50 +103,52 @@ inet_aton(cp, addr)
         u_int parts[4];
         register u_int *pp = parts;
 
+        c = *cp;
         for (;;) {
                 /*
                  * Collect number up to ``.''.
                  * Values are specified as for C:
-                 * 0x=hex, 0=octal, other=decimal.
+                 * 0x=hex, 0=octal, isdigit=decimal.
                  */
+                if (!isdigit(c))
+                        return (0);
                 val = 0; base = 10;
-                if (*cp == '0') {
-                        if (*++cp == 'x' || *cp == 'X')
-                                base = 16, cp++;
+                if (c == '0') {
+                        c = *++cp;
+                        if (c == 'x' || c == 'X')
+                                base = 16, c = *++cp;
                         else
                                 base = 8;
                 }
-                while ((c = *cp) != '\0') {
+                for (;;) {
                         if (isascii(c) && isdigit(c)) {
                                 val = (val * base) + (c - '0');
-                                cp++;
-                                continue;
-                        }
-                        if (base == 16 && isascii(c) && isxdigit(c)) {
-                                val = (val << 4) + 
+                                c = *++cp;
+                        } else if (base == 16 && isascii(c) && isxdigit(c)) {
+                                val = (val << 4) |
                                         (c + 10 - (islower(c) ? 'a' : 'A'));
-                                cp++;
-                                continue;
-                        }
-                        break;
+                                c = *++cp;
+                        } else
+                                break;
                 }
-                if (*cp == '.') {
+                if (c == '.') {
                         /*
                          * Internet format:
                          *      a.b.c.d
-                         *      a.b.c   (with c treated as 16-bits)
+                         *      a.b.c   (with c treated as 16 bits)
                          *      a.b     (with b treated as 24 bits)
                          */
-                        if (pp >= parts + 3 || val > 0xff)
+                        if (pp >= parts + 3)
                                 return (0);
-                        *pp++ = val, cp++;
+                        *pp++ = val;
+                        c = *++cp;
                 } else
                         break;
         }
         /*
          * Check for trailing characters.
          */
-        if (*cp && (!isascii(*cp) || !isspace(*cp)))
+        if (c != '\0' && (!isascii(c) || !isspace(c)))
                 return (0);
         /*
          * Concoct the address according to