1 /*
2 * INET An implementation of the TCP/IP protocol suite for the LINUX
3 * operating system. INET is implemented using the BSD Socket
4 * interface as the means of communication with the user level.
5 *
6 * Various kernel-resident INET utility functions; mainly
7 * for format conversion and debugging output.
8 *
9 * Version: $Id: utils.c,v 1.8 2000/10/03 07:29:01 anton Exp $
10 *
11 * Author: Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
12 *
13 * Fixes:
14 * Alan Cox : verify_area check.
15 * Alan Cox : removed old debugging.
16 * Andi Kleen : add net_ratelimit()
17 *
18 * This program is free software; you can redistribute it and/or
19 * modify it under the terms of the GNU General Public License
20 * as published by the Free Software Foundation; either version
21 * 2 of the License, or (at your option) any later version.
22 */
23
24 #include <linux/types.h>
25 #include <asm/byteorder.h>
26
27 /*
28 * Convert an ASCII string to binary IP.
29 */
30
in_aton(const char * str)31 __u32 in_aton(const char *str)
32 {
33 unsigned long l;
34 unsigned int val;
35 int i;
36
37 l = 0;
38 for (i = 0; i < 4; i++)
39 {
40 l <<= 8;
41 if (*str != '\0')
42 {
43 val = 0;
44 while (*str != '\0' && *str != '.')
45 {
46 val *= 10;
47 val += *str - '0';
48 str++;
49 }
50 l |= val;
51 if (*str != '\0')
52 str++;
53 }
54 }
55 return(htonl(l));
56 }
57
58