1 /**************************************************************************** 2 * Copyright 2020 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 1.11 2020/02/02 23:34:34 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 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, d2, d3, d4; 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 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 NCURSES_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 restictions on interop with C level 112 constructs (e.g. variable access or va_list + ellipsis constructs) 113 */ 114 NCURSES_EXPORT(FIELDTYPE *) 115 _nc_TYPE_IPV4(void) 116 { 117 return TYPE_IPV4; 118 } 119 #endif 120 121 /* fty_ipv4.c ends here */ 122