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📄 bpf.c(69.94 KB)
📄 bpf.h(14.6 KB)
📄 bpf_buffer.c(6.39 KB)
📄 bpf_buffer.h(2.04 KB)
📄 bpf_filter.c(12.09 KB)
📄 bpf_jitter.c(3.43 KB)
📄 bpf_jitter.h(3.3 KB)
📄 bpf_zerocopy.c(16.12 KB)
📄 bpf_zerocopy.h(2.36 KB)
📄 bpfdesc.h(6.04 KB)
📄 bridgestp.c(55.53 KB)
📄 bridgestp.h(13.06 KB)
📄 debugnet.c(26.35 KB)
📄 debugnet.h(8.54 KB)
📄 debugnet_inet.c(12.67 KB)
📄 debugnet_int.h(3.11 KB)
📄 dlt.h(44.23 KB)
📄 ethernet.h(22.17 KB)
📄 firewire.h(3.95 KB)
📄 ieee8023ad_lacp.c(53.91 KB)
📄 ieee8023ad_lacp.h(9.22 KB)
📄 ieee_oui.h(3.64 KB)
📄 if.c(105.86 KB)
📄 if.h(22.3 KB)
📄 if_arp.h(5.41 KB)
📄 if_bridge.c(89.97 KB)
📄 if_bridgevar.h(11.54 KB)
📄 if_clone.c(17.42 KB)
📄 if_clone.h(3.38 KB)
📄 if_dead.c(3.83 KB)
📄 if_debug.c(4.02 KB)
📄 if_disc.c(5.95 KB)
📄 if_dl.h(3.56 KB)
📄 if_edsc.c(9.93 KB)
📄 if_enc.c(12.02 KB)
📄 if_enc.h(1.65 KB)
📄 if_epair.c(27.75 KB)
📄 if_ethersubr.c(37.23 KB)
📄 if_fwsubr.c(19.22 KB)
📄 if_gif.c(16.66 KB)
📄 if_gif.h(4.16 KB)
📄 if_gre.c(18.8 KB)
📄 if_gre.h(5.69 KB)
📄 if_infiniband.c(14.99 KB)
📄 if_ipsec.c(24.98 KB)
📄 if_ipsec.h(1.62 KB)
📄 if_lagg.c(62.68 KB)
📄 if_lagg.h(8.94 KB)
📄 if_llatbl.c(20.5 KB)
📄 if_llatbl.h(9.52 KB)
📄 if_llc.h(4.53 KB)
📄 if_loop.c(10.62 KB)
📄 if_me.c(16.73 KB)
📄 if_media.c(12.81 KB)
📄 if_media.h(36.45 KB)
📄 if_mib.c(4.6 KB)
📄 if_mib.h(5.58 KB)
📄 if_pflog.h(2.24 KB)
📄 if_pfsync.h(6.85 KB)
📄 if_sppp.h(8.37 KB)
📄 if_spppfr.c(15.11 KB)
📄 if_spppsubr.c(132.44 KB)
📄 if_stf.c(19.3 KB)
📄 if_tap.h(2.54 KB)
📄 if_tun.h(1.43 KB)
📄 if_tuntap.c(47.67 KB)
📄 if_types.h(12.2 KB)
📄 if_var.h(29.92 KB)
📄 if_vlan.c(53.04 KB)
📄 if_vlan_var.h(6.1 KB)
📄 if_vxlan.c(88.14 KB)
📄 if_vxlan.h(4.71 KB)
📄 ifdi_if.m(8.4 KB)
📄 iflib.c(185.91 KB)
📄 iflib.h(14.41 KB)
📄 iflib_clone.c(7.37 KB)
📄 iflib_private.h(2.31 KB)
📄 ifq.h(12.2 KB)
📄 infiniband.h(2.64 KB)
📄 mp_ring.c(13.3 KB)
📄 mp_ring.h(2.77 KB)
📄 mppc.h(2.37 KB)
📄 mppcc.c(8.88 KB)
📄 mppcd.c(7.89 KB)
📄 netisr.c(44.33 KB)
📄 netisr.h(9.31 KB)
📄 netisr_internal.h(4.77 KB)
📄 netmap.h(32.93 KB)
📄 netmap_legacy.h(9.49 KB)
📄 netmap_user.h(30.33 KB)
📄 netmap_virt.h(3.89 KB)
📄 paravirt.h(6.91 KB)
📄 pfil.c(16.83 KB)
📄 pfil.h(5.86 KB)
📄 pfkeyv2.h(14.54 KB)
📄 pfvar.h(48.83 KB)
📄 ppp_defs.h(5.41 KB)
📄 radix.c(30.87 KB)
📄 radix.h(6.83 KB)
📄 raw_cb.c(3.77 KB)
📄 raw_cb.h(3.04 KB)
📄 raw_usrreq.c(6.26 KB)
📄 rndis.h(10.74 KB)
📁 route
📄 route.c(19.25 KB)
📄 route.h(16.54 KB)
📄 rss_config.c(14.12 KB)
📄 rss_config.h(4.69 KB)
📄 rtsock.c(62.94 KB)
📄 sff8436.h(8.3 KB)
📄 sff8472.h(18.95 KB)
📄 slcompress.c(16.25 KB)
📄 slcompress.h(6.4 KB)
📄 toeplitz.c(1.96 KB)
📄 toeplitz.h(1.72 KB)
📄 vnet.c(22.42 KB)
📄 vnet.h(14.62 KB)

Editing: bpf_buffer.c

/*-
 * SPDX-License-Identifier: BSD-3-Clause
 *
 * Copyright (c) 2007 Seccuris Inc.
 * All rights reserved.
 *
 * This software was developed by Robert N. M. Watson under contract to
 * Seccuris Inc.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * Copyright (c) 1990, 1991, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from the Stanford/CMU enet packet filter,
 * (net/enet.c) distributed as part of 4.3BSD, and code contributed
 * to Berkeley by Steven McCanne and Van Jacobson both of Lawrence
 * Berkeley Laboratory.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *      @(#)bpf.c	8.4 (Berkeley) 1/9/95
 */

#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");

#include "opt_bpf.h"

#include <sys/param.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/mutex.h>
#include <sys/socket.h>
#include <sys/uio.h>
#include <sys/kernel.h>
#include <sys/sysctl.h>

#include <net/if.h>
#include <net/bpf.h>
#include <net/bpf_buffer.h>
#include <net/bpfdesc.h>

/*
 * Implement historical kernel memory buffering model for BPF: two malloc(9)
 * kernel buffers are hung off of the descriptor.  The size is fixed prior to
 * attaching to an ifnet, ad cannot be changed after that.  read(2) simply
 * copies the data to user space using uiomove(9).
 */

static int bpf_bufsize = 4096;
SYSCTL_INT(_net_bpf, OID_AUTO, bufsize, CTLFLAG_RW,
    &bpf_bufsize, 0, "Default capture buffer size in bytes");
static int bpf_maxbufsize = BPF_MAXBUFSIZE;
SYSCTL_INT(_net_bpf, OID_AUTO, maxbufsize, CTLFLAG_RW,
    &bpf_maxbufsize, 0, "Maximum capture buffer in bytes");

/*
 * Simple data copy to the current kernel buffer.
 */
void
bpf_buffer_append_bytes(struct bpf_d *d, caddr_t buf, u_int offset,
    void *src, u_int len)
{
	u_char *src_bytes;

src_bytes = (u_char *)src;
	bcopy(src_bytes, buf + offset, len);
}

/*
 * Scatter-gather data copy from an mbuf chain to the current kernel buffer.
 */
void
bpf_buffer_append_mbuf(struct bpf_d *d, caddr_t buf, u_int offset, void *src,
    u_int len)
{
	const struct mbuf *m;
	u_char *dst;

m = (struct mbuf *)src;
	dst = (u_char *)buf + offset;
	m_copydata(m, 0, len, dst);
}

/*
 * Free BPF kernel buffers on device close.
 */
void
bpf_buffer_free(struct bpf_d *d)
{

if (d->bd_sbuf != NULL)
		free(d->bd_sbuf, M_BPF);
	if (d->bd_hbuf != NULL)
		free(d->bd_hbuf, M_BPF);
	if (d->bd_fbuf != NULL)
		free(d->bd_fbuf, M_BPF);

#ifdef INVARIANTS
	d->bd_sbuf = d->bd_hbuf = d->bd_fbuf = (caddr_t)~0;
#endif
}

/*
 * This is a historical initialization that occurs when the BPF descriptor is
 * first opened.  It does not imply selection of a buffer mode, so we don't
 * allocate buffers here.
 */
void
bpf_buffer_init(struct bpf_d *d)
{

d->bd_bufsize = bpf_bufsize;
}

/*
 * Allocate or resize buffers.
 */
int
bpf_buffer_ioctl_sblen(struct bpf_d *d, u_int *i)
{
	u_int size;
	caddr_t fbuf, sbuf;

size = *i;
	if (size > bpf_maxbufsize)
		*i = size = bpf_maxbufsize;
	else if (size < BPF_MINBUFSIZE)
		*i = size = BPF_MINBUFSIZE;

/* Allocate buffers immediately */
	fbuf = (caddr_t)malloc(size, M_BPF, M_WAITOK);
	sbuf = (caddr_t)malloc(size, M_BPF, M_WAITOK);

BPFD_LOCK(d);
	if (d->bd_bif != NULL) {
		/* Interface already attached, unable to change buffers */
		BPFD_UNLOCK(d);
		free(fbuf, M_BPF);
		free(sbuf, M_BPF);
		return (EINVAL);
	}

/* Free old buffers if set */
	if (d->bd_fbuf != NULL)
		free(d->bd_fbuf, M_BPF);
	if (d->bd_sbuf != NULL)
		free(d->bd_sbuf, M_BPF);

/* Fill in new data */
	d->bd_bufsize = size;
	d->bd_fbuf = fbuf;
	d->bd_sbuf = sbuf;

d->bd_hbuf = NULL;
	d->bd_slen = 0;
	d->bd_hlen = 0;

BPFD_UNLOCK(d);
	return (0);
}

/*
 * Copy buffer storage to user space in read().
 */
int
bpf_buffer_uiomove(struct bpf_d *d, caddr_t buf, u_int len, struct uio *uio)
{

return (uiomove(buf, len, uio));
}

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Editing: bpf_buffer.c

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