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/* $OpenBSD: fty_ipv4.c,v 1.3 1998/07/24 02:37:46 millert Exp $ */
/*
* THIS CODE IS SPECIFICALLY EXEMPTED FROM THE NCURSES PACKAGE COPYRIGHT.
* You may freely copy it for use as a template for your own field types.
* If you develop a field type that might be of general use, please send
* it back to the ncurses maintainers for inclusion in the next version.
*/
/***************************************************************************
* *
* Author : Per Foreby, perf@efd.lth.se *
* *
***************************************************************************/
#include "form.priv.h"
MODULE_ID("$From: fty_ipv4.c,v 1.2 1997/04/26 22:06:00 tom Exp $")
/*---------------------------------------------------------------------------
| Facility : libnform
| Function : static bool Check_IPV4_Field(
| FIELD * field,
| const void * argp)
|
| Description : Validate buffer content to be a valid IP number (Ver. 4)
|
| Return Values : TRUE - field is valid
| FALSE - field is invalid
+--------------------------------------------------------------------------*/
static bool Check_IPV4_Field(FIELD * field, const void * argp GCC_UNUSED)
{
char *bp = field_buffer(field,0);
int num = 0, len;
unsigned int d1, d2, d3, d4;
if(isdigit(*bp)) /* Must start with digit */
{
num = sscanf(bp, "%u.%u.%u.%u%n", &d1, &d2, &d3, &d4, &len);
if (num == 4)
{
bp += len; /* Make bp point to what sscanf() left */
while (*bp && isspace(*bp))
bp++; /* Allow trailing whitespace */
}
}
return ((num != 4 || *bp || d1 > 255 || d2 > 255
|| d3 > 255 || d4 > 255) ? FALSE : TRUE);
}
/*---------------------------------------------------------------------------
| Facility : libnform
| Function : static bool Check_IPV4_Character(
| int c,
| const void *argp )
|
| Description : Check a character for unsigned type or period.
|
| Return Values : TRUE - character is valid
| FALSE - character is invalid
+--------------------------------------------------------------------------*/
static bool Check_IPV4_Character(int c, const void * argp GCC_UNUSED)
{
return ((isdigit(c) || (c=='.')) ? TRUE : FALSE);
}
static FIELDTYPE typeIPV4 = {
_RESIDENT,
1, /* this is mutable, so we can't be const */
(FIELDTYPE *)0,
(FIELDTYPE *)0,
NULL,
NULL,
NULL,
Check_IPV4_Field,
Check_IPV4_Character,
NULL,
NULL
};
FIELDTYPE* TYPE_IPV4 = &typeIPV4;
/* fty_ipv4.c ends here */
|
