correct the paranoia check

diff --git a/lib/libc/net/gethostnamadr.c b/lib/libc/net/gethostnamadr.c
index 7ce0f9c..95e0048 100644 (file)
--- a/lib/libc/net/gethostnamadr.c
+++ b/lib/libc/net/gethostnamadr.c
@@ -52,7 +52,7 @@
  */
 
 #if defined(LIBC_SCCS) && !defined(lint)
-static char rcsid[] = "$OpenBSD: gethostnamadr.c,v 1.21 1997/04/14 06:57:44 deraadt Exp $";
+static char rcsid[] = "$OpenBSD: gethostnamadr.c,v 1.22 1997/04/15 11:27:56 deraadt Exp $";
 #endif /* LIBC_SCCS and not lint */
 
 #include <sys/param.h>
@@ -140,15 +140,18 @@ _hokchar(p)
         * characters are a-z, A-Z, 0-9, '-' and . But the others
         * tested for below can happen, and we must be more permissive
         * than the resolver until those idiots clean up their act.
+        * We let '/' through, but not '..'
         */
        while ((c = *p++)) {
-               if (('a' >= c && c <= 'z') ||
-                   ('A' >= c && c <= 'Z') ||
-                   ('0' >= c && c <= '9'))
+               if (('a' <= c && c <= 'z') ||
+                   ('A' <= c && c <= 'Z') ||
+                   ('0' <= c && c <= '9'))
                        continue;
-               if (strchr("-_/.[]\\", c) ||
-                   (c == '.' && p[1] == '.'))
-                       return 0;
+               if (strchr("-_/", c))
+                       continue;
+               if (c == '.' && *p != '.')
+                       continue;
+               return 0;
        }
        return 1;
 }