1 /****************************************************************************
2 * Copyright 2020,2021 Thomas E. Dickey *
3 * Copyright 1998-2006,2009 Free Software Foundation, Inc. *
4 * *
5 * Permission is hereby granted, free of charge, to any person obtaining a *
6 * copy of this software and associated documentation files (the *
7 * "Software"), to deal in the Software without restriction, including *
8 * without limitation the rights to use, copy, modify, merge, publish, *
9 * distribute, distribute with modifications, sublicense, and/or sell *
10 * copies of the Software, and to permit persons to whom the Software is *
11 * furnished to do so, subject to the following conditions: *
12 * *
13 * The above copyright notice and this permission notice shall be included *
14 * in all copies or substantial portions of the Software. *
15 * *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
17 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
18 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
19 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
20 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
21 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
22 * THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
23 * *
24 * Except as contained in this notice, the name(s) of the above copyright *
25 * holders shall not be used in advertising or otherwise to promote the *
26 * sale, use or other dealings in this Software without prior written *
27 * authorization. *
28 ****************************************************************************/
29
30 /***************************************************************************
31 * *
32 * Author : Per Foreby, perf@efd.lth.se *
33 * *
34 ***************************************************************************/
35
36 #include "form.priv.h"
37
38 MODULE_ID("$Id: fty_ipv4.c,v 1.16 2021/06/17 21:11:08 tom Exp $")
39
40 /*---------------------------------------------------------------------------
41 | Facility : libnform
42 | Function : static bool Check_IPV4_Field(
43 | FIELD * field,
44 | const void * argp)
45 |
46 | Description : Validate buffer content to be a valid IP number (Ver. 4)
47 |
48 | Return Values : TRUE - field is valid
49 | FALSE - field is invalid
50 +--------------------------------------------------------------------------*/
51 static bool
Check_IPV4_Field(FIELD * field,const void * argp GCC_UNUSED)52 Check_IPV4_Field(FIELD *field, const void *argp GCC_UNUSED)
53 {
54 char *bp = field_buffer(field, 0);
55 int num = 0, len;
56 unsigned int d1 = 0, d2 = 0, d3 = 0, d4 = 0;
57
58 if (isdigit(UChar(*bp))) /* Must start with digit */
59 {
60 num = sscanf(bp, "%u.%u.%u.%u%n", &d1, &d2, &d3, &d4, &len);
61 if (num == 4)
62 {
63 bp += len; /* Make bp point to what sscanf() left */
64 while (isspace(UChar(*bp)))
65 bp++; /* Allow trailing whitespace */
66 }
67 }
68 return ((num != 4 || *bp || d1 > 255 || d2 > 255
69 || d3 > 255 || d4 > 255) ? FALSE : TRUE);
70 }
71
72 /*---------------------------------------------------------------------------
73 | Facility : libnform
74 | Function : static bool Check_IPV4_Character(
75 | int c,
76 | const void *argp )
77 |
78 | Description : Check a character for unsigned type or period.
79 |
80 | Return Values : TRUE - character is valid
81 | FALSE - character is invalid
82 +--------------------------------------------------------------------------*/
83 static bool
Check_IPV4_Character(int c,const void * argp GCC_UNUSED)84 Check_IPV4_Character(int c, const void *argp GCC_UNUSED)
85 {
86 return ((isdigit(UChar(c)) || (c == '.')) ? TRUE : FALSE);
87 }
88
89 static FIELDTYPE typeIPV4 =
90 {
91 _RESIDENT,
92 1, /* this is mutable, so we can't be const */
93 (FIELDTYPE *)0,
94 (FIELDTYPE *)0,
95 NULL,
96 NULL,
97 NULL,
98 INIT_FT_FUNC(Check_IPV4_Field),
99 INIT_FT_FUNC(Check_IPV4_Character),
100 INIT_FT_FUNC(NULL),
101 INIT_FT_FUNC(NULL),
102 #if NCURSES_INTEROP_FUNCS
103 NULL
104 #endif
105 };
106
107 FORM_EXPORT_VAR(FIELDTYPE *) TYPE_IPV4 = &typeIPV4;
108
109 #if NCURSES_INTEROP_FUNCS
110 /* The next routines are to simplify the use of ncurses from
111 programming languages with restrictions on interop with C level
112 constructs (e.g. variable access or va_list + ellipsis constructs)
113 */
114 FORM_EXPORT(FIELDTYPE *)
_nc_TYPE_IPV4(void)115 _nc_TYPE_IPV4(void)
116 {
117 return TYPE_IPV4;
118 }
119 #endif
120
121 /* fty_ipv4.c ends here */
122