1 /* $OpenBSD: fty_ipv4.c,v 1.8 2023/10/17 09:52:10 nicm Exp $ */ 2 /**************************************************************************** 3 * Copyright 2020,2021 Thomas E. Dickey * 4 * Copyright 1998-2006,2009 Free Software Foundation, Inc. * 5 * * 6 * Permission is hereby granted, free of charge, to any person obtaining a * 7 * copy of this software and associated documentation files (the * 8 * "Software"), to deal in the Software without restriction, including * 9 * without limitation the rights to use, copy, modify, merge, publish, * 10 * distribute, distribute with modifications, sublicense, and/or sell * 11 * copies of the Software, and to permit persons to whom the Software is * 12 * furnished to do so, subject to the following conditions: * 13 * * 14 * The above copyright notice and this permission notice shall be included * 15 * in all copies or substantial portions of the Software. * 16 * * 17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * 18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * 19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * 20 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * 21 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * 22 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR * 23 * THE USE OR OTHER DEALINGS IN THE SOFTWARE. * 24 * * 25 * Except as contained in this notice, the name(s) of the above copyright * 26 * holders shall not be used in advertising or otherwise to promote the * 27 * sale, use or other dealings in this Software without prior written * 28 * authorization. * 29 ****************************************************************************/ 30 31 /*************************************************************************** 32 * * 33 * Author : Per Foreby, perf@efd.lth.se * 34 * * 35 ***************************************************************************/ 36 37 #include "form.priv.h" 38 39 MODULE_ID("$Id: fty_ipv4.c,v 1.8 2023/10/17 09:52:10 nicm Exp $") 40 41 /*--------------------------------------------------------------------------- 42 | Facility : libnform 43 | Function : static bool Check_IPV4_Field( 44 | FIELD * field, 45 | const void * argp) 46 | 47 | Description : Validate buffer content to be a valid IP number (Ver. 4) 48 | 49 | Return Values : TRUE - field is valid 50 | FALSE - field is invalid 51 +--------------------------------------------------------------------------*/ 52 static bool 53 Check_IPV4_Field(FIELD *field, const void *argp GCC_UNUSED) 54 { 55 char *bp = field_buffer(field, 0); 56 int num = 0, len; 57 unsigned int d1 = 0, d2 = 0, d3 = 0, d4 = 0; 58 59 if (isdigit(UChar(*bp))) /* Must start with digit */ 60 { 61 num = sscanf(bp, "%u.%u.%u.%u%n", &d1, &d2, &d3, &d4, &len); 62 if (num == 4) 63 { 64 bp += len; /* Make bp point to what sscanf() left */ 65 while (isspace(UChar(*bp))) 66 bp++; /* Allow trailing whitespace */ 67 } 68 } 69 return ((num != 4 || *bp || d1 > 255 || d2 > 255 70 || d3 > 255 || d4 > 255) ? FALSE : TRUE); 71 } 72 73 /*--------------------------------------------------------------------------- 74 | Facility : libnform 75 | Function : static bool Check_IPV4_Character( 76 | int c, 77 | const void *argp ) 78 | 79 | Description : Check a character for unsigned type or period. 80 | 81 | Return Values : TRUE - character is valid 82 | FALSE - character is invalid 83 +--------------------------------------------------------------------------*/ 84 static bool 85 Check_IPV4_Character(int c, const void *argp GCC_UNUSED) 86 { 87 return ((isdigit(UChar(c)) || (c == '.')) ? TRUE : FALSE); 88 } 89 90 static FIELDTYPE typeIPV4 = 91 { 92 _RESIDENT, 93 1, /* this is mutable, so we can't be const */ 94 (FIELDTYPE *)0, 95 (FIELDTYPE *)0, 96 NULL, 97 NULL, 98 NULL, 99 INIT_FT_FUNC(Check_IPV4_Field), 100 INIT_FT_FUNC(Check_IPV4_Character), 101 INIT_FT_FUNC(NULL), 102 INIT_FT_FUNC(NULL), 103 #if NCURSES_INTEROP_FUNCS 104 NULL 105 #endif 106 }; 107 108 FORM_EXPORT_VAR(FIELDTYPE *) TYPE_IPV4 = &typeIPV4; 109 110 #if NCURSES_INTEROP_FUNCS 111 /* The next routines are to simplify the use of ncurses from 112 programming languages with restrictions on interop with C level 113 constructs (e.g. variable access or va_list + ellipsis constructs) 114 */ 115 FORM_EXPORT(FIELDTYPE *) 116 _nc_TYPE_IPV4(void) 117 { 118 return TYPE_IPV4; 119 } 120 #endif 121 122 /* fty_ipv4.c ends here */ 123