1 /**************************************************************************** 2 * Copyright (c) 1998-2004,2006 Free Software Foundation, Inc. * 3 * * 4 * Permission is hereby granted, free of charge, to any person obtaining a * 5 * copy of this software and associated documentation files (the * 6 * "Software"), to deal in the Software without restriction, including * 7 * without limitation the rights to use, copy, modify, merge, publish, * 8 * distribute, distribute with modifications, sublicense, and/or sell * 9 * copies of the Software, and to permit persons to whom the Software is * 10 * furnished to do so, subject to the following conditions: * 11 * * 12 * The above copyright notice and this permission notice shall be included * 13 * in all copies or substantial portions of the Software. * 14 * * 15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * 16 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * 17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * 18 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * 19 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * 20 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR * 21 * THE USE OR OTHER DEALINGS IN THE SOFTWARE. * 22 * * 23 * Except as contained in this notice, the name(s) of the above copyright * 24 * holders shall not be used in advertising or otherwise to promote the * 25 * sale, use or other dealings in this Software without prior written * 26 * authorization. * 27 ****************************************************************************/ 28 29 /*************************************************************************** 30 * * 31 * Author : Per Foreby, perf@efd.lth.se * 32 * * 33 ***************************************************************************/ 34 35 #include "form.priv.h" 36 37 MODULE_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 +--------------------------------------------------------------------------*/ 50 static bool 51 Check_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 +--------------------------------------------------------------------------*/ 82 static bool 83 Check_IPV4_Character(int c, const void *argp GCC_UNUSED) 84 { 85 return ((isdigit(UChar(c)) || (c == '.')) ? TRUE : FALSE); 86 } 87 88 static 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 }; 102 103 NCURSES_EXPORT_VAR(FIELDTYPE*) TYPE_IPV4 = &typeIPV4; 104 105 /* fty_ipv4.c ends here */ 106