diff --git a/form/fty_ipv4.c b/form/fty_ipv4.c
new file mode 100644
index 0000000..5d1a209
--- /dev/null
+++ b/form/fty_ipv4.c
@@ -0,0 +1,105 @@
+/****************************************************************************
+ * Copyright (c) 1998-2004,2006 Free Software Foundation, Inc.              *
+ *                                                                          *
+ * Permission is hereby granted, free of charge, to any person obtaining a  *
+ * copy of this software and associated documentation files (the            *
+ * "Software"), to deal in the Software without restriction, including      *
+ * without limitation the rights to use, copy, modify, merge, publish,      *
+ * distribute, distribute with modifications, sublicense, and/or sell       *
+ * copies of the Software, and to permit persons to whom the Software is    *
+ * furnished to do so, subject to the following conditions:                 *
+ *                                                                          *
+ * The above copyright notice and this permission notice shall be included  *
+ * in all copies or substantial portions of the Software.                   *
+ *                                                                          *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
+ * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    *
+ * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    *
+ * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
+ *                                                                          *
+ * Except as contained in this notice, the name(s) of the above copyright   *
+ * holders shall not be used in advertising or otherwise to promote the     *
+ * sale, use or other dealings in this Software without prior written       *
+ * authorization.                                                           *
+ ****************************************************************************/
+
+/***************************************************************************
+*                                                                          *
+*  Author : Per Foreby, perf@efd.lth.se                                    *
+*                                                                          *
+***************************************************************************/
+
+#include "form.priv.h"
+
+MODULE_ID("$Id: fty_ipv4.c,v 1.8 2006/12/02 19:33:02 tom Exp $")
+
+/*---------------------------------------------------------------------------
+|   Facility      :  libnform  
+|   Function      :  static bool Check_IPV4_Field(
+|                                      FIELD * field,
+|                                      const void * argp)
+|   
+|   Description   :  Validate buffer content to be a valid IP number (Ver. 4)
+|
+|   Return Values :  TRUE  - field is valid
+|                    FALSE - field is invalid
++--------------------------------------------------------------------------*/
+static bool
+Check_IPV4_Field(FIELD *field, const void *argp GCC_UNUSED)
+{
+  char *bp = field_buffer(field, 0);
+  int num = 0, len;
+  unsigned int d1, d2, d3, d4;
+
+  if (isdigit(UChar(*bp)))	/* Must start with digit */
+    {
+      num = sscanf(bp, "%u.%u.%u.%u%n", &d1, &d2, &d3, &d4, &len);
+      if (num == 4)
+	{
+	  bp += len;		/* Make bp point to what sscanf() left */
+	  while (isspace(UChar(*bp)))
+	    bp++;		/* Allow trailing whitespace */
+	}
+    }
+  return ((num != 4 || *bp || d1 > 255 || d2 > 255
+	   || d3 > 255 || d4 > 255) ? FALSE : TRUE);
+}
+
+/*---------------------------------------------------------------------------
+|   Facility      :  libnform  
+|   Function      :  static bool Check_IPV4_Character(
+|                                      int c, 
+|                                      const void *argp )
+|   
+|   Description   :  Check a character for unsigned type or period.
+|
+|   Return Values :  TRUE  - character is valid
+|                    FALSE - character is invalid
++--------------------------------------------------------------------------*/
+static bool
+Check_IPV4_Character(int c, const void *argp GCC_UNUSED)
+{
+  return ((isdigit(UChar(c)) || (c == '.')) ? TRUE : FALSE);
+}
+
+static FIELDTYPE typeIPV4 =
+{
+  _RESIDENT,
+  1,				/* this is mutable, so we can't be const */
+  (FIELDTYPE *)0,
+  (FIELDTYPE *)0,
+  NULL,
+  NULL,
+  NULL,
+  Check_IPV4_Field,
+  Check_IPV4_Character,
+  NULL,
+  NULL
+};
+
+NCURSES_EXPORT_VAR(FIELDTYPE*) TYPE_IPV4 = &typeIPV4;
+
+/* fty_ipv4.c ends here */