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/* $FreeBSD$ */
/*
* Copyright (C) 2012 by Darren Reed.
*
* See the IPFILTER.LICENCE file for details on licencing.
*/
/*
* kmemcpy() - copies n bytes from kernel memory into user buffer.
* returns 0 on success, -1 on error.
*/
#include <stdio.h>
#include <sys/param.h>
#include <sys/types.h>
#include <sys/uio.h>
#include <unistd.h>
#include <string.h>
#include <fcntl.h>
#include <sys/file.h>
#include <kvm.h>
#include <fcntl.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <net/if.h>
#include "kmem.h"
#ifndef __STDC__
# define const
#endif
#if !defined(lint)
static const char sccsid[] = "@(#)kmem.c 1.4 1/12/96 (C) 1992 Darren Reed";
static const char rcsid[] = "@(#)$Id$";
#endif
static kvm_t *kvm_f = NULL;
int openkmem(kern, core)
char *kern, *core;
{
kvm_f = kvm_open(kern, core, NULL, O_RDONLY, NULL);
if (kvm_f == NULL)
{
perror("openkmem:open");
return -1;
}
return kvm_f != NULL;
}
int kmemcpy(buf, pos, n)
register char *buf;
long pos;
register int n;
{
register int r;
if (!n)
return 0;
if (kvm_f == NULL)
if (openkmem(NULL, NULL) == -1)
return -1;
while ((r = kvm_read(kvm_f, pos, buf, n)) < n)
if (r <= 0)
{
fprintf(stderr, "pos=0x%lx ", (u_long)pos);
perror("kmemcpy:read");
return -1;
}
else
{
buf += r;
pos += r;
n -= r;
}
return 0;
}
int kstrncpy(buf, pos, n)
register char *buf;
long pos;
register int n;
{
register int r;
if (!n)
return 0;
if (kvm_f == NULL)
if (openkmem(NULL, NULL) == -1)
return -1;
while (n > 0)
{
r = kvm_read(kvm_f, pos, buf, 1);
if (r <= 0)
{
fprintf(stderr, "pos=0x%lx ", (u_long)pos);
perror("kmemcpy:read");
return -1;
}
else
{
if (*buf == '\0')
break;
buf++;
pos++;
n--;
}
}
return 0;
}
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