Approved by: glebius (mentor) BSD Licensed by: Darren Reed <darrenr@reed.wattle.id.au> (author)
352 lines
6.1 KiB
C
352 lines
6.1 KiB
C
/* $FreeBSD$ */
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/*
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* Copyright (C) 2012 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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* 29/12/94 Added code from Marc Huber <huber@fzi.de> to allow it to allocate
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* its own major char number! Way cool patch!
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*/
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/time.h>
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#include <sys/file.h>
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#include <sys/socket.h>
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#include <sys/conf.h>
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#include <sys/syslog.h>
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#include <sys/buf.h>
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#include <sys/mbuf.h>
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#include <sys/param.h>
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#include <sys/errno.h>
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#include <sys/uio.h>
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#include <sys/vnode.h>
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#include <sundev/mbvar.h>
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#include <sun/autoconf.h>
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#include <sun/vddrv.h>
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#if defined(sun4c) || defined(sun4m)
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# include <sun/openprom.h>
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#endif
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#include <netinet/in.h>
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#include <netinet/in_systm.h>
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#include <netinet/ip.h>
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#include <netinet/ip_var.h>
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#include <netinet/tcp.h>
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#include <netinet/tcpip.h>
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#include <net/if.h>
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#include "ipl.h"
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#include "ip_compat.h"
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#include "ip_fil.h"
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#if !defined(lint)
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static const char sccsid[] = "@(#)mls_ipl.c 2.6 10/15/95 (C) 1993-2000 Darren Reed";
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static const char rcsid[] = "@(#)$Id$";
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#endif
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extern int ipfdetach __P((void));
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#ifndef IPFILTER_LOG
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#define ipfread nulldev
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#endif
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extern int nulldev __P((void));
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extern int errno;
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extern int nodev __P((void));
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static int unload __P((void));
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static int ipf_attach __P((void));
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int xxxinit __P((u_int, struct vddrv *, caddr_t, struct vdstat *));
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static char *ipf_devfiles[] = { IPL_NAME, IPNAT_NAME, IPSTATE_NAME,
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IPAUTH_NAME, IPSYNC_NAME, IPSCAN_NAME,
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IPLOOKUP_NAME, NULL };
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static int ipfopen __P((dev_t, int));
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static int ipfclose __P((dev_t, int));
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static int ipfread __P((dev_t, struct uio *));
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static int ipfwrite __P((dev_t, struct uio *));
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struct cdevsw ipfdevsw =
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{
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ipfopen, ipfclose, ipfread, nulldev,
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ipfioctl, nulldev, nulldev, nulldev,
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0, nulldev,
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};
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struct dev_ops ipf_ops =
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{
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1,
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ipfidentify,
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ipfattach,
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ipfopen,
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ipfclose,
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ipfread,
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ipfwrite,
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NULL, /* strategy */
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NULL, /* dump */
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0, /* psize */
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ipfioctl,
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NULL, /* reset */
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NULL /* mmap */
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};
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int ipf_major = 0;
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#ifdef sun4m
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struct vdldrv vd =
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{
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VDMAGIC_PSEUDO,
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IPL_VERSION,
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&ipf_ops,
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NULL,
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&ipfdevsw,
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0,
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0,
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NULL,
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NULL,
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NULL,
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0,
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1,
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};
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#else /* sun4m */
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struct vdldrv vd =
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{
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VDMAGIC_PSEUDO, /* magic */
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IPL_VERSION,
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#ifdef sun4c
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&ipf_ops, /* dev_ops */
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#else
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NULL, /* struct mb_ctlr *mb_ctlr */
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NULL, /* struct mb_driver *mb_driver */
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NULL, /* struct mb_device *mb_device */
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0, /* num ctlrs */
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1, /* numdevs */
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#endif /* sun4c */
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NULL, /* bdevsw */
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&ipfdevsw, /* cdevsw */
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0, /* block major */
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0, /* char major */
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};
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#endif /* sun4m */
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extern int vd_unuseddev __P((void));
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extern struct cdevsw cdevsw[];
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extern int nchrdev;
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xxxinit(fc, vdp, data, vds)
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u_int fc;
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struct vddrv *vdp;
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caddr_t data;
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struct vdstat *vds;
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{
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struct vdioctl_load *vdi = (struct vdioctl_load *)data;
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switch (fc)
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{
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case VDLOAD:
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{
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struct vdconf *vdc;
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if (vdi && vdi->vdi_userconf)
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for (vdc = vdi->vdi_userconf; vdc->vdc_type; vdc++)
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if (vdc->vdc_type == VDCCHARMAJOR) {
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ipf_major = vdc->vdc_data;
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break;
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}
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if (!ipf_major) {
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while (ipf_major < nchrdev &&
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cdevsw[ipf_major].d_open != vd_unuseddev)
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ipf_major++;
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if (ipf_major == nchrdev)
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return ENODEV;
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}
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vdp->vdd_vdtab = (struct vdlinkage *)&vd;
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vd.Drv_charmajor = ipf_major;
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return ipf_attach();
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}
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case VDUNLOAD:
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return unload();
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case VDSTAT:
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return 0;
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default:
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return EIO;
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}
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}
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static int
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unload()
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{
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int err = 0, i;
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char *name;
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if (ipf_refcnt != 0)
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err = EBUSY;
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else if (ipf_running >= 0)
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err = ipfdetach();
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if (err)
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return err;
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ipf_running = -2;
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for (i = 0; (name = ipf_devfiles[i]); i++)
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(void) vn_remove(name, UIO_SYSSPACE, FILE);
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printf("%s unloaded\n", ipfilter_version);
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return 0;
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}
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static int
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ipf_attach()
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{
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struct vnode *vp;
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struct vattr vattr;
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int error = 0, fmode = S_IFCHR|0600, i;
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char *name;
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error = ipfattach();
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if (error)
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return error;
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for (i = 0; (name = ipf_devfiles[i]); i++) {
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(void) vn_remove(name, UIO_SYSSPACE, FILE);
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vattr_null(&vattr);
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vattr.va_type = MFTOVT(fmode);
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vattr.va_mode = (fmode & 07777);
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vattr.va_rdev = (ipf_major << 8) | i;
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error = vn_create(name, UIO_SYSSPACE, &vattr, EXCL, 0, &vp);
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if (error) {
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printf("IP Filter: vn_create(%s) = %d\n", name, error);
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break;
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} else {
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VN_RELE(vp);
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}
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}
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if (error == 0) {
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char *defpass;
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if (FR_ISPASS(ipf_pass))
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defpass = "pass";
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else if (FR_ISBLOCK(ipf_pass))
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defpass = "block";
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else
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defpass = "no-match -> block";
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printf("%s initialized. Default = %s all, Logging = %s%s\n",
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ipfilter_version, defpass,
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#ifdef IPFILTER_LOG
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"enabled",
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#else
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"disabled",
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#endif
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#ifdef IPFILTER_COMPILED
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" (COMPILED)"
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#else
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""
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#endif
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);
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ipf_running = 1;
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}
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return error;
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}
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/*
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* routines below for saving IP headers to buffer
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*/
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static int
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ipfopen(dev, flags)
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dev_t dev;
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int flags;
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{
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u_int unit = GET_MINOR(dev);
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int error;
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if (IPL_LOGMAX < unit) {
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error = ENXIO;
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} else {
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switch (unit)
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{
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case IPL_LOGIPF :
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case IPL_LOGNAT :
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case IPL_LOGSTATE :
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case IPL_LOGAUTH :
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case IPL_LOGLOOKUP :
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case IPL_LOGSYNC :
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#ifdef IPFILTER_SCAN
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case IPL_LOGSCAN :
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#endif
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error = 0;
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break;
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default :
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error = ENXIO;
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break;
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}
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}
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return error;
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}
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static int
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ipfclose(dev, flags)
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dev_t dev;
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int flags;
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{
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u_int unit = GET_MINOR(dev);
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if (IPL_LOGMAX < unit)
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unit = ENXIO;
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else
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unit = 0;
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return unit;
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}
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/*
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* ipfread/ipflog
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* both of these must operate with at least splnet() lest they be
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* called during packet processing and cause an inconsistancy to appear in
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* the filter lists.
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*/
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static int
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ipfread(dev, uio)
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dev_t dev;
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register struct uio *uio;
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{
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if (ipf_running < 1) {
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ipfmain.ipf_interror = 130006;
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return EIO;
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}
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#ifdef IPFILTER_LOG
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return ipflog_read(GET_MINOR(dev), uio);
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#else
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ipfmain.ipf_interror = 130007;
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return ENXIO;
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#endif
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}
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/*
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* ipfwrite
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*/
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static int
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ipfwrite(dev, uio)
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dev_t dev;
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register struct uio *uio;
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{
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if (ipf_running < 1) {
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ipfmain.ipf_interror = 130008;
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return EIO;
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}
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if (getminor(dev) == IPL_LOGSYNC)
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return ipfsync_write(uio);
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ipfmain.ipf_interror = 130009;
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return ENXIO;
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}
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