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if_disc.c (8876) if_disc.c (10429)
1/*
2 * Copyright (c) 1982, 1986, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright

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26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 * From: @(#)if_loop.c 8.1 (Berkeley) 6/10/93
1/*
2 * Copyright (c) 1982, 1986, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright

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26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 * From: @(#)if_loop.c 8.1 (Berkeley) 6/10/93
34 * $Id: if_disc.c,v 1.3 1995/03/20 19:20:39 wollman Exp $
34 * $Id: if_disc.c,v 1.4 1995/05/30 08:08:01 rgrimes Exp $
35 */
36
37/*
38 * Discard interface driver for protocol testing and timing.
39 * (Based on the loopback.)
40 */
41
42#include <sys/param.h>

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75#include "bpfilter.h"
76
77#ifdef TINY_DSMTU
78#define DSMTU (1024+512)
79#else
80#define DSMTU 65532
81#endif
82
35 */
36
37/*
38 * Discard interface driver for protocol testing and timing.
39 * (Based on the loopback.)
40 */
41
42#include <sys/param.h>

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75#include "bpfilter.h"
76
77#ifdef TINY_DSMTU
78#define DSMTU (1024+512)
79#else
80#define DSMTU 65532
81#endif
82
83static void discattach __P((caddr_t udata));
84PSEUDO_SET(discattach, if_disc);
85
83static struct ifnet dsif;
84static int dsoutput(struct ifnet *, struct mbuf *, struct sockaddr *,
85 struct rtentry *);
86static int dsioctl(struct ifnet *, int, caddr_t);
87
88/* ARGSUSED */
89static void
86static struct ifnet dsif;
87static int dsoutput(struct ifnet *, struct mbuf *, struct sockaddr *,
88 struct rtentry *);
89static int dsioctl(struct ifnet *, int, caddr_t);
90
91/* ARGSUSED */
92static void
90discattach(void)
93discattach(udata)
94 caddr_t udata;
91{
92 register struct ifnet *ifp = &dsif;
93
94 ifp->if_name = "ds";
95 ifp->if_mtu = DSMTU;
96 ifp->if_flags = IFF_LOOPBACK | IFF_MULTICAST;
97 ifp->if_ioctl = dsioctl;
98 ifp->if_output = dsoutput;
99 ifp->if_type = IFT_LOOP;
100 ifp->if_hdrlen = 0;
101 ifp->if_addrlen = 0;
102 if_attach(ifp);
103#if NBPFILTER > 0
104 bpfattach(&ifp->if_bpf, ifp, DLT_NULL, sizeof(u_int));
105#endif
106}
107
95{
96 register struct ifnet *ifp = &dsif;
97
98 ifp->if_name = "ds";
99 ifp->if_mtu = DSMTU;
100 ifp->if_flags = IFF_LOOPBACK | IFF_MULTICAST;
101 ifp->if_ioctl = dsioctl;
102 ifp->if_output = dsoutput;
103 ifp->if_type = IFT_LOOP;
104 ifp->if_hdrlen = 0;
105 ifp->if_addrlen = 0;
106 if_attach(ifp);
107#if NBPFILTER > 0
108 bpfattach(&ifp->if_bpf, ifp, DLT_NULL, sizeof(u_int));
109#endif
110}
111
108PSEUDO_SET(discattach, if_disc);
109
110static int
111dsoutput(ifp, m, dst, rt)
112 struct ifnet *ifp;
113 register struct mbuf *m;
114 struct sockaddr *dst;
115 register struct rtentry *rt;
116{
117 int s, isr;

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113dsoutput(ifp, m, dst, rt)
114 struct ifnet *ifp;
115 register struct mbuf *m;
116 struct sockaddr *dst;
117 register struct rtentry *rt;
118{
119 int s, isr;

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