1/****************************************************************************
2 * Copyright (c) 1998-2004,2006 Free Software Foundation, Inc.              *
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28
29/***************************************************************************
30*                                                                          *
31*  Author : Per Foreby, perf@efd.lth.se                                    *
32*                                                                          *
33***************************************************************************/
34
35#include "form.priv.h"
36
37MODULE_ID("$Id: fty_ipv4.c,v 1.8 2006/12/02 19:33:02 tom Exp $")
38
39/*---------------------------------------------------------------------------
40|   Facility      :  libnform
41|   Function      :  static bool Check_IPV4_Field(
42|                                      FIELD * field,
43|                                      const void * argp)
44|
45|   Description   :  Validate buffer content to be a valid IP number (Ver. 4)
46|
47|   Return Values :  TRUE  - field is valid
48|                    FALSE - field is invalid
49+--------------------------------------------------------------------------*/
50static bool
51Check_IPV4_Field(FIELD *field, const void *argp GCC_UNUSED)
52{
53  char *bp = field_buffer(field, 0);
54  int num = 0, len;
55  unsigned int d1, d2, d3, d4;
56
57  if (isdigit(UChar(*bp)))	/* Must start with digit */
58    {
59      num = sscanf(bp, "%u.%u.%u.%u%n", &d1, &d2, &d3, &d4, &len);
60      if (num == 4)
61	{
62	  bp += len;		/* Make bp point to what sscanf() left */
63	  while (isspace(UChar(*bp)))
64	    bp++;		/* Allow trailing whitespace */
65	}
66    }
67  return ((num != 4 || *bp || d1 > 255 || d2 > 255
68	   || d3 > 255 || d4 > 255) ? FALSE : TRUE);
69}
70
71/*---------------------------------------------------------------------------
72|   Facility      :  libnform
73|   Function      :  static bool Check_IPV4_Character(
74|                                      int c,
75|                                      const void *argp )
76|
77|   Description   :  Check a character for unsigned type or period.
78|
79|   Return Values :  TRUE  - character is valid
80|                    FALSE - character is invalid
81+--------------------------------------------------------------------------*/
82static bool
83Check_IPV4_Character(int c, const void *argp GCC_UNUSED)
84{
85  return ((isdigit(UChar(c)) || (c == '.')) ? TRUE : FALSE);
86}
87
88static FIELDTYPE typeIPV4 =
89{
90  _RESIDENT,
91  1,				/* this is mutable, so we can't be const */
92  (FIELDTYPE *)0,
93  (FIELDTYPE *)0,
94  NULL,
95  NULL,
96  NULL,
97  Check_IPV4_Field,
98  Check_IPV4_Character,
99  NULL,
100  NULL
101};
102
103NCURSES_EXPORT_VAR(FIELDTYPE*) TYPE_IPV4 = &typeIPV4;
104
105/* fty_ipv4.c ends here */
106