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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: @(#)utils.c 1.0.7 05/18/93
*
* Author: Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
*
* Fixes:
* Alan Cox : verify_area check.
*
*
* 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/segment.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 "inet.h"
#include "dev.h"
#include "eth.h"
#include "ip.h"
#include "protocol.h"
#include "tcp.h"
#include "skbuff.h"
#include "arp.h"
/* Display an IP address in readable format. */
char *in_ntoa(unsigned long in)
{
static char buff[18];
register 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. */
unsigned long
in_aton(char *str)
{
unsigned long l;
unsigned int val;
int i;
l = 0;
for (i = 0; i < 4; i++) {
l <<= 8;
if (*str != '\0') {
val = 0;
while (*str != '\0' && *str != '.') {
val *= 10;
val += *str - '0';
str++;
}
l |= val;
if (*str != '\0') str++;
}
}
return(htonl(l));
}
void
dprintf(int level, char *fmt, ...)
{
va_list args;
char *buff;
extern int vsprintf(char * buf, const char * fmt, va_list args);
if (level != inet_debug) return;
buff = (char *) kmalloc(256, GFP_ATOMIC);
if (buff != NULL) {
va_start(args, fmt);
vsprintf(buff, fmt, args);
va_end(args);
printk(buff);
kfree(buff);
}
}
int
dbg_ioctl(void *arg, int level)
{
int val;
int err;
if (!suser()) return(-EPERM);
err=verify_area(VERIFY_READ, (void *)arg, sizeof(int));
if(err)
return err;
val = get_fs_long((int *)arg);
switch(val) {
case 0: /* OFF */
inet_debug = DBG_OFF;
break;
case 1: /* ON, INET */
inet_debug = level;
break;
case DBG_RT: /* modules */
case DBG_DEV:
case DBG_ETH:
case DBG_PROTO:
case DBG_TMR:
case DBG_PKT:
case DBG_RAW:
case DBG_LOOPB: /* drivers */
case DBG_SLIP:
case DBG_ARP: /* protocols */
case DBG_IP:
case DBG_ICMP:
case DBG_TCP:
case DBG_UDP:
inet_debug = val;
break;
default:
return(-EINVAL);
}
return(0);
}