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bpf.c (9819) bpf.c (10624)
1/*
2 * Copyright (c) 1990, 1991, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * This code is derived from the Stanford/CMU enet packet filter,
6 * (net/enet.c) distributed as part of 4.3BSD, and code contributed
7 * to Berkeley by Steven McCanne and Van Jacobson both of Lawrence
8 * Berkeley Laboratory.

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32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * SUCH DAMAGE.
37 *
38 * @(#)bpf.c 8.2 (Berkeley) 3/28/94
39 *
1/*
2 * Copyright (c) 1990, 1991, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * This code is derived from the Stanford/CMU enet packet filter,
6 * (net/enet.c) distributed as part of 4.3BSD, and code contributed
7 * to Berkeley by Steven McCanne and Van Jacobson both of Lawrence
8 * Berkeley Laboratory.

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32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * SUCH DAMAGE.
37 *
38 * @(#)bpf.c 8.2 (Berkeley) 3/28/94
39 *
40 * $Id: bpf.c,v 1.9 1995/07/16 10:13:08 bde Exp $
40 * $Id: bpf.c,v 1.10 1995/07/31 10:35:36 peter Exp $
41 */
42
43#include "bpfilter.h"
44
45#if NBPFILTER > 0
46
47#ifndef __GNUC__
48#define inline

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303#define D_MARKUSED(d) ((d)->bd_next = 0)
304
305/*
306 * Open ethernet device. Returns ENXIO for illegal minor device number,
307 * EBUSY if file is open by another process.
308 */
309/* ARGSUSED */
310int
41 */
42
43#include "bpfilter.h"
44
45#if NBPFILTER > 0
46
47#ifndef __GNUC__
48#define inline

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303#define D_MARKUSED(d) ((d)->bd_next = 0)
304
305/*
306 * Open ethernet device. Returns ENXIO for illegal minor device number,
307 * EBUSY if file is open by another process.
308 */
309/* ARGSUSED */
310int
311bpfopen(dev, flag)
311bpfopen(dev, flags, fmt, p)
312 dev_t dev;
312 dev_t dev;
313 int flag;
313 int flags;
314 int fmt;
315 struct proc *p;
314{
315 register struct bpf_d *d;
316
317 if (minor(dev) >= NBPFILTER)
318 return (ENXIO);
319 /*
320 * Each minor can be opened by only one process. If the requested
321 * minor is in use, return EBUSY.

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333}
334
335/*
336 * Close the descriptor by detaching it from its interface,
337 * deallocating its buffers, and marking it free.
338 */
339/* ARGSUSED */
340int
316{
317 register struct bpf_d *d;
318
319 if (minor(dev) >= NBPFILTER)
320 return (ENXIO);
321 /*
322 * Each minor can be opened by only one process. If the requested
323 * minor is in use, return EBUSY.

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335}
336
337/*
338 * Close the descriptor by detaching it from its interface,
339 * deallocating its buffers, and marking it free.
340 */
341/* ARGSUSED */
342int
341bpfclose(dev, flag)
343bpfclose(dev, flags, fmt, p)
342 dev_t dev;
344 dev_t dev;
343 int flag;
345 int flags;
346 int fmt;
347 struct proc *p;
344{
345 register struct bpf_d *d = &bpf_dtab[minor(dev)];
346 register int s;
347
348 s = splimp();
349 if (d->bd_bif)
350 bpf_detachd(d);
351 splx(s);

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403 (d)->bd_hlen = (d)->bd_slen; \
404 (d)->bd_sbuf = (d)->bd_fbuf; \
405 (d)->bd_slen = 0; \
406 (d)->bd_fbuf = 0;
407/*
408 * bpfread - read next chunk of packets from buffers
409 */
410int
348{
349 register struct bpf_d *d = &bpf_dtab[minor(dev)];
350 register int s;
351
352 s = splimp();
353 if (d->bd_bif)
354 bpf_detachd(d);
355 splx(s);

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407 (d)->bd_hlen = (d)->bd_slen; \
408 (d)->bd_sbuf = (d)->bd_fbuf; \
409 (d)->bd_slen = 0; \
410 (d)->bd_fbuf = 0;
411/*
412 * bpfread - read next chunk of packets from buffers
413 */
414int
411bpfread(dev, uio)
415bpfread(dev, uio, ioflag)
412 dev_t dev;
413 register struct uio *uio;
416 dev_t dev;
417 register struct uio *uio;
418 int ioflag;
414{
415 register struct bpf_d *d = &bpf_dtab[minor(dev)];
416 int error;
417 int s;
418
419 /*
420 * Restrict application to use a buffer the same size as
421 * as kernel buffers.

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517 selwakeup(d->bd_selproc, (int)d->bd_selcoll);
518 d->bd_selcoll = 0;
519 d->bd_selproc = 0;
520 }
521#endif
522}
523
524int
419{
420 register struct bpf_d *d = &bpf_dtab[minor(dev)];
421 int error;
422 int s;
423
424 /*
425 * Restrict application to use a buffer the same size as
426 * as kernel buffers.

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522 selwakeup(d->bd_selproc, (int)d->bd_selcoll);
523 d->bd_selcoll = 0;
524 d->bd_selproc = 0;
525 }
526#endif
527}
528
529int
525bpfwrite(dev, uio)
530bpfwrite(dev, uio, ioflag)
526 dev_t dev;
527 struct uio *uio;
531 dev_t dev;
532 struct uio *uio;
533 int ioflag;
528{
529 register struct bpf_d *d = &bpf_dtab[minor(dev)];
530 struct ifnet *ifp;
531 struct mbuf *m;
532 int error, s;
533 static struct sockaddr dst;
534 int datlen;
535

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593 * BIOCSRTIMEOUT Set read timeout.
594 * BIOCGRTIMEOUT Get read timeout.
595 * BIOCGSTATS Get packet stats.
596 * BIOCIMMEDIATE Set immediate mode.
597 * BIOCVERSION Get filter language version.
598 */
599/* ARGSUSED */
600int
534{
535 register struct bpf_d *d = &bpf_dtab[minor(dev)];
536 struct ifnet *ifp;
537 struct mbuf *m;
538 int error, s;
539 static struct sockaddr dst;
540 int datlen;
541

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599 * BIOCSRTIMEOUT Set read timeout.
600 * BIOCGRTIMEOUT Get read timeout.
601 * BIOCGSTATS Get packet stats.
602 * BIOCIMMEDIATE Set immediate mode.
603 * BIOCVERSION Get filter language version.
604 */
605/* ARGSUSED */
606int
601bpfioctl(dev, cmd, addr, flag)
607bpfioctl(dev, cmd, addr, flags, p)
602 dev_t dev;
603 int cmd;
604 caddr_t addr;
608 dev_t dev;
609 int cmd;
610 caddr_t addr;
605 int flag;
611 int flags;
612 struct proc *p;
606{
607 register struct bpf_d *d = &bpf_dtab[minor(dev)];
608 int s, error = 0;
609
610 switch (cmd) {
611
612 default:
613 error = EINVAL;

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614 register struct bpf_d *d = &bpf_dtab[minor(dev)];
615 int s, error = 0;
616
617 switch (cmd) {
618
619 default:
620 error = EINVAL;

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