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📄 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)
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📄 if.c(105.86 KB)
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📄 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)
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📄 if_loop.c(10.62 KB)
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📄 if_media.h(36.45 KB)
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📄 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)
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📄 pfil.h(5.86 KB)
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📄 ppp_defs.h(5.41 KB)
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📄 route.c(19.25 KB)
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📄 rss_config.h(4.69 KB)
📄 rtsock.c(62.94 KB)
📄 sff8436.h(8.3 KB)
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📄 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: if_edsc.c

/*-
 * SPDX-License-Identifier: BSD-3-Clause
 *
 * Copyright (c) 1982, 1986, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * 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 edsclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following edsclaimer 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 EDSCLAIMED.  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.
 *
 *	From: @(#)if_loop.c	8.1 (Berkeley) 6/10/93
 * $FreeBSD$
 */

/*
 * Discard interface driver for protocol testing and timing.
 * Mimics an Ethernet device so that VLANs can be attached to it etc.
 */

#include <sys/param.h>		/* types, important constants */
#include <sys/kernel.h>		/* SYSINIT for load-time initializations */
#include <sys/malloc.h>		/* malloc(9) */
#include <sys/module.h>		/* module(9) */
#include <sys/mbuf.h>		/* mbuf(9) */
#include <sys/socket.h>		/* struct ifreq */
#include <sys/sockio.h>		/* socket ioctl's */
/* #include <sys/systm.h> if you need printf(9) or other all-purpose globals */

#include <net/bpf.h>		/* bpf(9) */
#include <net/ethernet.h>	/* Ethernet related constants and types */
#include <net/if.h>
#include <net/if_var.h>		/* basic part of ifnet(9) */
#include <net/if_clone.h>	/* network interface cloning */
#include <net/if_types.h>	/* IFT_ETHER and friends */
#include <net/if_var.h>		/* kernel-only part of ifnet(9) */
#include <net/vnet.h>

static const char edscname[] = "edsc";

/*
 * Software configuration of an interface specific to this device type.
 */
struct edsc_softc {
	struct ifnet	*sc_ifp; /* ptr to generic interface configuration */

/*
	 * A non-null driver can keep various things here, for instance,
	 * the hardware revision, cached values of write-only registers, etc.
	 */
};

/*
 * Attach to the interface cloning framework.
 */
VNET_DEFINE_STATIC(struct if_clone *, edsc_cloner);
#define	V_edsc_cloner	VNET(edsc_cloner)
static int	edsc_clone_create(struct if_clone *, int, caddr_t);
static void	edsc_clone_destroy(struct ifnet *);

/*
 * Interface driver methods.
 */
static void	edsc_init(void *dummy);
/* static void edsc_input(struct ifnet *ifp, struct mbuf *m); would be here */
static int	edsc_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data);
static void	edsc_start(struct ifnet *ifp);

/*
 * We'll allocate softc instances from this.
 */
static		MALLOC_DEFINE(M_EDSC, edscname, "Ethernet discard interface");

/*
 * Create an interface instance.
 */
static int
edsc_clone_create(struct if_clone *ifc, int unit, caddr_t params)
{
	struct edsc_softc	*sc;
	struct ifnet		*ifp;
	struct ether_addr	eaddr;

/*
	 * Allocate soft and ifnet structures.  Link each to the other.
	 */
	sc = malloc(sizeof(struct edsc_softc), M_EDSC, M_WAITOK | M_ZERO);
	ifp = sc->sc_ifp = if_alloc(IFT_ETHER);
	if (ifp == NULL) {
		free(sc, M_EDSC);
		return (ENOSPC);
	}

ifp->if_softc = sc;

/*
	 * Get a name for this particular interface in its ifnet structure.
	 */
	if_initname(ifp, edscname, unit);

/*
	 * Typical Ethernet interface flags: we can do broadcast and
	 * multicast but can't hear our own broadcasts or multicasts.
	 */
	ifp->if_flags = IFF_BROADCAST | IFF_MULTICAST | IFF_SIMPLEX;

/*
	 * We can pretent we have the whole set of hardware features
	 * because we just discard all packets we get from the upper layer.
	 * However, the features are disabled initially.  They can be
	 * enabled via edsc_ioctl() when needed.
	 */
	ifp->if_capabilities =
	    IFCAP_VLAN_MTU | IFCAP_VLAN_HWTAGGING | IFCAP_VLAN_HWCSUM |
	    IFCAP_HWCSUM | IFCAP_TSO |
	    IFCAP_JUMBO_MTU;
	ifp->if_capenable = 0;

/*
	 * Set the interface driver methods.
	 */
	ifp->if_init = edsc_init;
	/* ifp->if_input = edsc_input; */
	ifp->if_ioctl = edsc_ioctl;
	ifp->if_start = edsc_start;

/*
	 * Set the maximum output queue length from the global parameter.
	 */
	ifp->if_snd.ifq_maxlen = ifqmaxlen;

/*
	 * Generate an arbitrary MAC address for the cloned interface.
	 */
	ether_gen_addr(ifp, &eaddr);

/*
	 * Do ifnet initializations common to all Ethernet drivers
	 * and attach to the network interface framework.
	 */
	ether_ifattach(ifp, eaddr.octet);

/*
	 * Now we can mark the interface as running, i.e., ready
	 * for operation.
	 */
	ifp->if_drv_flags |= IFF_DRV_RUNNING;

return (0);
}

/*
 * Destroy an interface instance.
 */
static void
edsc_clone_destroy(struct ifnet *ifp)
{
	struct edsc_softc	*sc = ifp->if_softc;

/*
	 * Detach from the network interface framework.
	 */
	ether_ifdetach(ifp);

/*
	 * Free memory occupied by ifnet and softc.
	 */
	if_free(ifp);
	free(sc, M_EDSC);
}

/*
 * This method is invoked from ether_ioctl() when it's time
 * to bring up the hardware.
 */
static void
edsc_init(void *dummy)
{
#if 0	/* what a hardware driver would do here... */
	struct edsc_soft	*sc = (struct edsc_softc *)dummy;
	struct ifnet		*ifp = sc->sc_ifp;

/* blah-blah-blah */
#endif
}

/*
 * Network interfaces are controlled via the ioctl(2) syscall.
 */
static int
edsc_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
{
	struct ifreq		*ifr = (struct ifreq *)data;

switch (cmd) {
	case SIOCSIFCAP:
#if 1
		/*
		 * Just turn on any capabilities requested.
		 * The generic ifioctl() function has already made sure
		 * that they are supported, i.e., set in if_capabilities.
		 */
		ifp->if_capenable = ifr->ifr_reqcap;
#else
		/*
		 * A h/w driver would need to analyze the requested
		 * bits and program the hardware, e.g.:
		 */
		mask = ifp->if_capenable ^ ifr->ifr_reqcap;

if (mask & IFCAP_VLAN_HWTAGGING) {
			ifp->if_capenable ^= IFCAP_VLAN_HWTAGGING;

if (ifp->if_capenable & IFCAP_VLAN_HWTAGGING)
				/* blah-blah-blah */
			else
				/* etc-etc-etc */
		}
#endif
		break;

default:
		/*
		 * Offload the rest onto the common Ethernet handler.
		 */
		return (ether_ioctl(ifp, cmd, data));
	}

return (0);
}

/*
 * Process the output queue.
 */
static void
edsc_start(struct ifnet *ifp)
{
	struct mbuf		*m;

/*
	 * A hardware interface driver can set IFF_DRV_OACTIVE
	 * in ifp->if_drv_flags:
	 *
	 * ifp->if_drv_flags |= IFF_DRV_OACTIVE;
	 *
	 * to prevent if_start from being invoked again while the
	 * transmission is under way.  The flag is to protect the
	 * device's transmitter, not the method itself.  The output
	 * queue is locked and several threads can process it in
	 * parallel safely, so the driver can use other means to
	 * serialize access to the transmitter.
	 *
	 * If using IFF_DRV_OACTIVE, the driver should clear the flag
	 * not earlier than the current transmission is complete, e.g.,
	 * upon an interrupt from the device, not just before returning
	 * from if_start.  This method merely starts the transmission,
	 * which may proceed asynchronously.
	 */

/*
	 * We loop getting packets from the queue until it's empty.
	 * A h/w driver would loop until the device can accept more
	 * data into its buffer, or while there are free transmit
	 * descriptors, or whatever.
	 */
	for (;;) {
		/*
		 * Try to dequeue one packet.  Stop if the queue is empty.
		 * Use IF_DEQUEUE() here if ALTQ(9) support is unneeded.
		 */
		IFQ_DEQUEUE(&ifp->if_snd, m);
		if (m == NULL)
			break;

/*
		 * Let bpf(9) at the packet.
		 */
		BPF_MTAP(ifp, m);

/*
		 * Update the interface counters.
		 */
		if_inc_counter(ifp, IFCOUNTER_OBYTES, m->m_pkthdr.len);
		if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1);

/*
		 * Finally, just drop the packet.
		 * TODO: Reply to ARP requests unless IFF_NOARP is set.
		 */
		m_freem(m);
	}

/*
	 * ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
	 * would be here only if the transmission were synchronous.
	 */
}

static void
vnet_edsc_init(const void *unused __unused)
{

/*
	 * Connect to the network interface cloning framework.
	 * The last argument is the number of units to be created
	 * from the outset.  It's also the minimum number of units
	 * allowed.  We don't want any units created as soon as the
	 * driver is loaded.
	 */
	V_edsc_cloner = if_clone_simple(edscname, edsc_clone_create,
	    edsc_clone_destroy, 0);
}
VNET_SYSINIT(vnet_edsc_init, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_ANY,
    vnet_edsc_init, NULL);

static void
vnet_edsc_uninit(const void *unused __unused)
{

/*
	 * Disconnect from the cloning framework.
	 * Existing interfaces will be disposed of properly.
	 */
	if_clone_detach(V_edsc_cloner);
}
VNET_SYSUNINIT(vnet_edsc_uninit, SI_SUB_INIT_IF, SI_ORDER_ANY,
    vnet_edsc_uninit, NULL);

/*
 * This function provides handlers for module events, namely load and unload.
 */
static int
edsc_modevent(module_t mod, int type, void *data)
{

switch (type) {
	case MOD_LOAD:
	case MOD_UNLOAD:
		break;
	default:
		/*
		 * There are other event types, but we don't handle them.
		 * See module(9).
		 */
		return (EOPNOTSUPP);
	}
	return (0);
}

static moduledata_t edsc_mod = {
	"if_edsc",			/* name */
	edsc_modevent,			/* event handler */
	NULL				/* additional data */
};

DECLARE_MODULE(if_edsc, edsc_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);

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Editing: if_edsc.c

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