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| 2 | /*
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| 3 | * THIS CODE IS SPECIFICALLY EXEMPTED FROM THE NCURSES PACKAGE COPYRIGHT.
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| 4 | * You may freely copy it for use as a template for your own field types.
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| 5 | * If you develop a field type that might be of general use, please send
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| 6 | * it back to the ncurses maintainers for inclusion in the next version.
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| 7 | */
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| 8 | /***************************************************************************
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| 9 | * *
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| 10 | * Author : Per Foreby, [email protected] *
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| 11 | * *
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| 12 | ***************************************************************************/
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| 13 |
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| 14 | #include "form.priv.h"
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| 15 |
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| 16 | MODULE_ID("$Id: fty_ipv4.c,v 1.6 2004/05/29 19:13:48 tom Exp $")
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| 17 |
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| 18 | /*---------------------------------------------------------------------------
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| 19 | | Facility : libnform
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| 20 | | Function : static bool Check_IPV4_Field(
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| 21 | | FIELD * field,
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| 22 | | const void * argp)
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| 23 | |
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| 24 | | Description : Validate buffer content to be a valid IP number (Ver. 4)
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| 25 | |
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| 26 | | Return Values : TRUE - field is valid
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| 27 | | FALSE - field is invalid
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| 28 | +--------------------------------------------------------------------------*/
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| 29 | static bool
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| 30 | Check_IPV4_Field(FIELD *field, const void *argp GCC_UNUSED)
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| 31 | {
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| 32 | char *bp = field_buffer(field, 0);
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| 33 | int num = 0, len;
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| 34 | unsigned int d1, d2, d3, d4;
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| 35 |
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| 36 | if (isdigit(UChar(*bp))) /* Must start with digit */
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| 37 | {
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| 38 | num = sscanf(bp, "%u.%u.%u.%u%n", &d1, &d2, &d3, &d4, &len);
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| 39 | if (num == 4)
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| 40 | {
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| 41 | bp += len; /* Make bp point to what sscanf() left */
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| 42 | while (*bp && isspace(UChar(*bp)))
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| 43 | bp++; /* Allow trailing whitespace */
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