184 lines
3.3 KiB
C
184 lines
3.3 KiB
C
/* $NetBSD: kmem.c,v 1.4 2002/01/24 08:30:27 martti Exp $ */
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/*
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* Copyright (C) 1993-2002 by Darren Reed.
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*
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* See the IPFILTER.LICENCE file for details on licencing.
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*/
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/*
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* kmemcpy() - copies n bytes from kernel memory into user buffer.
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* returns 0 on success, -1 on error.
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*/
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#include <stdio.h>
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#include <sys/param.h>
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#include <sys/types.h>
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#include <sys/uio.h>
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#include <unistd.h>
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#include <string.h>
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#include <fcntl.h>
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#include <sys/file.h>
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#include <kvm.h>
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#include <fcntl.h>
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#include <sys/socket.h>
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#include <sys/ioctl.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <netinet/in_systm.h>
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#include <netinet/ip.h>
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#include <net/if.h>
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#if __FreeBSD_version >= 300000
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# include <net/if_var.h>
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#endif
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#include "kmem.h"
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#ifndef __STDC__
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# define const
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#endif
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#if !defined(lint)
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static const char sccsid[] = "@(#)kmem.c 1.4 1/12/96 (C) 1992 Darren Reed";
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static const char rcsid[] = "@(#)Id: kmem.c,v 2.2.2.8 2002/01/15 14:36:53 darrenr Exp";
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#endif
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static kvm_t *kvm_f = NULL;
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int openkmem(kern, core)
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char *kern, *core;
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{
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kvm_f = kvm_open(kern, core, NULL, O_RDONLY, NULL);
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if (kvm_f == NULL)
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{
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perror("openkmem:open");
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return -1;
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}
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return 0;
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}
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int kmemcpy(buf, pos, n)
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register char *buf;
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long pos;
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register int n;
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{
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register int r;
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if (!n)
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return 0;
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if (kvm_f == NULL)
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if (openkmem(NULL, NULL) == -1)
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return -1;
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while ((r = kvm_read(kvm_f, pos, buf, n)) < n)
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if (r <= 0)
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{
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fprintf(stderr, "pos=0x%x ", (u_int)pos);
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perror("kmemcpy:read");
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return -1;
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}
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else
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{
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buf += r;
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pos += r;
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n -= r;
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}
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return 0;
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}
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int kstrncpy(buf, pos, n)
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register char *buf;
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long pos;
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register int n;
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{
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register int r;
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if (!n)
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return 0;
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if (kvm_f == NULL)
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if (openkmem(NULL, NULL) == -1)
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return -1;
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while (n > 0)
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{
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r = kvm_read(kvm_f, pos, buf, 1);
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if (r <= 0)
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{
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fprintf(stderr, "pos=0x%x ", (u_int)pos);
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perror("kmemcpy:read");
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return -1;
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}
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else
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{
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if (*buf == '\0')
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break;
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buf++;
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pos++;
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n--;
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}
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}
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return 0;
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}
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/*
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* Given a pointer to an interface in the kernel, return a pointer to a
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* string which is the interface name.
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*/
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char *getifname(ptr)
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void *ptr;
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{
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#if SOLARIS
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char *ifname;
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ill_t ill;
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if (ptr == (void *)-1)
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return "!";
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if (ptr == NULL)
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return "-";
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if (kmemcpy((char *)&ill, (u_long)ptr, sizeof(ill)) == -1)
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return "X";
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ifname = malloc(ill.ill_name_length + 1);
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if (kmemcpy(ifname, (u_long)ill.ill_name,
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ill.ill_name_length) == -1)
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return "X";
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return ifname;
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#else
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# if defined(NetBSD) && (NetBSD >= 199905) && (NetBSD < 1991011) || \
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defined(__OpenBSD__)
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#else
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char buf[32];
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int len;
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# endif
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struct ifnet netif;
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if (ptr == (void *)-1)
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return "!";
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if (ptr == NULL)
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return "-";
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if (kmemcpy((char *)&netif, (u_long)ptr, sizeof(netif)) == -1)
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return "X";
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# if defined(NetBSD) && (NetBSD >= 199905) && (NetBSD < 1991011) || \
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defined(__OpenBSD__)
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return strdup(netif.if_xname);
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# else
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if (kstrncpy(buf, (u_long)netif.if_name, sizeof(buf)) == -1)
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return "X";
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if (netif.if_unit < 10)
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len = 2;
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else if (netif.if_unit < 1000)
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len = 3;
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else if (netif.if_unit < 10000)
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len = 4;
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else
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len = 5;
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buf[sizeof(buf) - len] = '\0';
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sprintf(buf + strlen(buf), "%d", netif.if_unit % 10000);
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return strdup(buf);
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# endif
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#endif
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}
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