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/*
* Copyright (C) 1993-2002 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.
*/
#if defined(__sgi) && (IRIX > 602)
# include <sys/ptimers.h>
#endif
#include <stdio.h>
#include <sys/param.h>
#include <sys/types.h>
#include <unistd.h>
#include <string.h>
#include <fcntl.h>
#include <stdlib.h>
#include <sys/file.h>
#ifndef __sgi
#include <kvm.h>
#endif
#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>
#if __FreeBSD_version >= 300000
# include <net/if_var.h>
#endif
#include "kmem.h"
#include "netinet/ip_compat.h"
#include "netinet/ip_fil.h"
#include "ipf.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: kmem.c,v 2.2.2.18 2003/11/09 17:22:22 darrenr Exp $";
#endif
#ifdef __sgi
typedef int kvm_t;
static int kvm_fd = -1;
static char *kvm_errstr = NULL;
kvm_t *kvm_open(kernel, core, swap, mode, errstr)
char *kernel, *core, *swap;
int mode;
char *errstr;
{
kvm_errstr = errstr;
if (core == NULL)
core = "/dev/kmem";
kvm_fd = open(core, mode);
return (kvm_fd >= 0) ? (kvm_t *)&kvm_fd : NULL;
}
int kvm_read(kvm, pos, buffer, size)
kvm_t *kvm;
u_long pos;
char *buffer;
size_t size;
{
size_t left;
char *bufp;
int r;
if (lseek(*kvm, pos, 0) == -1) {
if (kvm_errstr != NULL) {
fprintf(stderr, "%s:", kvm_errstr);
perror("lseek");
}
return -1;
}
for (bufp = buffer, left = size; left > 0; bufp += r, left -= r) {
r = read(*kvm, bufp, 1);
if (r <= 0)
return -1;
}
return size;
}
#endif
static kvm_t *kvm_f = NULL;
int openkmem(kern, core)
char *kern, *core;
{
union {
int ui;
kvm_t *uk;
} k;
kvm_f = kvm_open(kern, core, NULL, O_RDONLY, NULL);
if (kvm_f == NULL)
{
perror("openkmem:open");
return -1;
}
k.uk = kvm_f;
return k.ui;
}
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, (size_t)n)) < n)
if (r <= 0)
{
fprintf(stderr, "pos=0x%x ", (u_int)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, (size_t)1);
if (r <= 0)
{
fprintf(stderr, "pos=0x%x ", (u_int)pos);
perror("kstrncpy:read");
return -1;
}
else
{
if (*buf == '\0')
break;
buf++;
pos++;
n--;
}
}
return 0;
}
/*
* Given a pointer to an interface in the kernel, return a pointer to a
* string which is the interface name.
*/
char *getifname(ptr)
void *ptr;
{
#if SOLARIS
char *ifname;
ill_t ill;
if (ptr == (void *)-1)
return "!";
if (ptr == NULL)
return "-";
if (kmemcpy((char *)&ill, (u_long)ptr, sizeof(ill)) == -1)
return "X";
ifname = malloc(ill.ill_name_length + 1);
if (kmemcpy(ifname, (u_long)ill.ill_name,
ill.ill_name_length) == -1)
return "X";
return ifname;
#else
# if defined(NetBSD) && (NetBSD >= 199905) && (NetBSD < 1991011) || \
defined(__OpenBSD__) || \
(defined(__FreeBSD__) && (__FreeBSD_version >= 501113))
#else
char buf[32];
int len;
# endif
struct ifnet netif;
if (ptr == (void *)-1)
return "!";
if (ptr == NULL)
return "-";
if (kmemcpy((char *)&netif, (u_long)ptr, sizeof(netif)) == -1)
return "X";
# if defined(NetBSD) && (NetBSD >= 199905) && (NetBSD < 1991011) || \
defined(__OpenBSD__) || \
(defined(__FreeBSD__) && (__FreeBSD_version >= 501113))
return strdup(netif.if_xname);
# else
if (kstrncpy(buf, (u_long)netif.if_name, sizeof(buf)) == -1)
return "X";
if (netif.if_unit < 10)
len = 2;
else if (netif.if_unit < 1000)
len = 3;
else if (netif.if_unit < 10000)
len = 4;
else
len = 5;
buf[sizeof(buf) - len] = '\0';
sprintf(buf + strlen(buf), "%d", netif.if_unit % 10000);
return strdup(buf);
# endif
#endif
}
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