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git.ipfire.org Git - thirdparty/dhcp.git/blob - omapip/inet_addr.c
1 /* $NetBSD: inet_addr.c,v 1.6 1996/02/02 15:22:23 mrg Exp $ */
4 * Copyright (c) 1983, 1990, 1993
5 * The Regents of the University of California. All rights reserved.
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8 * modification, are permitted provided that the following conditions
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11 * notice, this list of conditions and the following disclaimer.
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34 #include "omapip/omapip_p.h"
38 * Check whether "cp" is a valid ascii representation
39 * of an Internet address and convert to a binary address.
40 * Returns 1 if the address is valid, 0 if not.
41 * This replaces inet_addr, the return value from which
42 * cannot distinguish between failure and a local broadcast address.
53 register u_int
*pp
= parts
;
57 * Collect number up to ``.''.
58 * Values are specified as for C:
59 * 0x=hex, 0=octal, other=decimal.
63 if (*++cp
== 'x' || *cp
== 'X')
68 while ((c
= *cp
) != '\0') {
69 if (isascii(c
) && isdigit((int)c
)) {
70 val
= (val
* base
) + (c
- '0');
74 if (base
== 16 && isascii(c
) && isxdigit((int)c
)) {
76 (c
+ 10 - (islower((int)c
) ? 'a' : 'A'));
86 * a.b.c (with c treated as 16-bits)
87 * a.b (with b treated as 24 bits)
89 if (pp
>= parts
+ 3 || val
> 0xff)
96 * Check for trailing characters.
98 if (*cp
&& (!isascii(*cp
) || !isspace((int)*cp
)))
101 * Concoct the address according to
102 * the number of parts specified.
108 return (0); /* initial nondigit */
110 case 1: /* a -- 32 bits */
113 case 2: /* a.b -- 8.24 bits */
116 val
|= parts
[0] << 24;
119 case 3: /* a.b.c -- 8.8.16 bits */
122 val
|= (parts
[0] << 24) | (parts
[1] << 16);
125 case 4: /* a.b.c.d -- 8.8.8.8 bits */
128 val
|= (parts
[0] << 24) | (parts
[1] << 16) | (parts
[2] << 8);
132 addr
->s_addr
= htonl(val
);