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/*
* 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"
static kvm_t *kvm_f = NULL;
int
openkmem(char *kern, char *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(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(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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