utils.c
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上传日期:2013-02-24
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- /*
- * INET An implementation of the TCP/IP protocol suite for the LINUX
- * operating system. INET is implemented using the BSD Socket
- * interface as the means of communication with the user level.
- *
- * Various kernel-resident INET utility functions; mainly
- * for format conversion and debugging output.
- *
- * Version: $Id: utils.c,v 1.8 2000/10/03 07:29:01 anton Exp $
- *
- * Author: Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
- *
- * Fixes:
- * Alan Cox : verify_area check.
- * Alan Cox : removed old debugging.
- * Andi Kleen : add net_ratelimit()
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- */
- #include <asm/uaccess.h>
- #include <asm/system.h>
- #include <linux/types.h>
- #include <linux/kernel.h>
- #include <linux/sched.h>
- #include <linux/string.h>
- #include <linux/mm.h>
- #include <linux/socket.h>
- #include <linux/in.h>
- #include <linux/errno.h>
- #include <linux/stat.h>
- #include <stdarg.h>
- #include <linux/inet.h>
- #include <linux/netdevice.h>
- #include <linux/etherdevice.h>
- #include <net/ip.h>
- #include <net/protocol.h>
- #include <net/tcp.h>
- #include <linux/skbuff.h>
- /*
- * Display an IP address in readable format.
- */
-
- char *in_ntoa(__u32 in)
- {
- static char buff[18];
- char *p;
- p = (char *) ∈
- sprintf(buff, "%d.%d.%d.%d",
- (p[0] & 255), (p[1] & 255), (p[2] & 255), (p[3] & 255));
- return(buff);
- }
- /*
- * Convert an ASCII string to binary IP.
- */
-
- __u32 in_aton(const char *str)
- {
- unsigned long l;
- unsigned int val;
- int i;
- l = 0;
- for (i = 0; i < 4; i++)
- {
- l <<= 8;
- if (*str != ' ')
- {
- val = 0;
- while (*str != ' ' && *str != '.')
- {
- val *= 10;
- val += *str - '0';
- str++;
- }
- l |= val;
- if (*str != ' ')
- str++;
- }
- }
- return(htonl(l));
- }