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
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 4. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 * 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
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 4. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 * From: @(#)if_loop.c 8.1 (Berkeley) 6/10/93
|
31 */
32
33/*
34 * Discard interface driver for protocol testing and timing.
35 * (Based on the loopback.)
36 */
37
38#include <sys/param.h>
39#include <sys/systm.h>
40#include <sys/kernel.h>
41#include <sys/malloc.h>
42#include <sys/module.h>
43#include <sys/mbuf.h>
44#include <sys/socket.h>
45#include <sys/sockio.h>
46
47#include <net/if.h>
48#include <net/if_var.h>
49#include <net/if_clone.h>
50#include <net/if_types.h>
51#include <net/route.h>
52#include <net/bpf.h>
53
54#include "opt_inet.h"
55#include "opt_inet6.h"
56
57#ifdef TINY_DSMTU
58#define DSMTU (1024+512)
59#else
60#define DSMTU 65532
61#endif
62
63struct disc_softc {
64 struct ifnet *sc_ifp;
65};
66
67static int discoutput(struct ifnet *, struct mbuf *,
68 const struct sockaddr *, struct route *);
69static void discrtrequest(int, struct rtentry *, struct rt_addrinfo *);
70static int discioctl(struct ifnet *, u_long, caddr_t);
71static int disc_clone_create(struct if_clone *, int, caddr_t);
72static void disc_clone_destroy(struct ifnet *);
73
74static const char discname[] = "disc";
75static MALLOC_DEFINE(M_DISC, discname, "Discard interface");
76
77static struct if_clone *disc_cloner;
78
79static int
80disc_clone_create(struct if_clone *ifc, int unit, caddr_t params)
81{
82 struct ifnet *ifp;
83 struct disc_softc *sc;
84
85 sc = malloc(sizeof(struct disc_softc), M_DISC, M_WAITOK | M_ZERO);
86 ifp = sc->sc_ifp = if_alloc(IFT_LOOP);
87 if (ifp == NULL) {
88 free(sc, M_DISC);
89 return (ENOSPC);
90 }
91
92 ifp->if_softc = sc;
93 if_initname(ifp, discname, unit);
94 ifp->if_mtu = DSMTU;
95 /*
96 * IFF_LOOPBACK should not be removed from disc's flags because
97 * it controls what PF-specific routes are magically added when
98 * a network address is assigned to the interface. Things just
99 * won't work as intended w/o such routes because the output
100 * interface selection for a packet is totally route-driven.
101 * A valid alternative to IFF_LOOPBACK can be IFF_BROADCAST or
102 * IFF_POINTOPOINT, but it would result in different properties
103 * of the interface.
104 */
105 ifp->if_flags = IFF_LOOPBACK | IFF_MULTICAST;
106 ifp->if_drv_flags = IFF_DRV_RUNNING;
107 ifp->if_ioctl = discioctl;
108 ifp->if_output = discoutput;
109 ifp->if_hdrlen = 0;
110 ifp->if_addrlen = 0;
111 ifp->if_snd.ifq_maxlen = 20;
112 if_attach(ifp);
113 bpfattach(ifp, DLT_NULL, sizeof(u_int32_t));
114
115 return (0);
116}
117
118static void
119disc_clone_destroy(struct ifnet *ifp)
120{
121 struct disc_softc *sc;
122
123 sc = ifp->if_softc;
124
125 bpfdetach(ifp);
126 if_detach(ifp);
127 if_free(ifp);
128
129 free(sc, M_DISC);
130}
131
132static int
133disc_modevent(module_t mod, int type, void *data)
134{
135
136 switch (type) {
137 case MOD_LOAD:
138 disc_cloner = if_clone_simple(discname, disc_clone_create,
139 disc_clone_destroy, 0);
140 break;
141 case MOD_UNLOAD:
142 if_clone_detach(disc_cloner);
143 break;
144 default:
145 return (EOPNOTSUPP);
146 }
147 return (0);
148}
149
150static moduledata_t disc_mod = {
151 "if_disc",
152 disc_modevent,
153 NULL
154};
155
156DECLARE_MODULE(if_disc, disc_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
157
158static int
159discoutput(struct ifnet *ifp, struct mbuf *m, const struct sockaddr *dst,
160 struct route *ro)
161{
162 u_int32_t af;
163
164 M_ASSERTPKTHDR(m);
165
166 /* BPF writes need to be handled specially. */
167 if (dst->sa_family == AF_UNSPEC)
168 bcopy(dst->sa_data, &af, sizeof(af));
169 else
170 af = dst->sa_family;
171
172 if (bpf_peers_present(ifp->if_bpf))
173 bpf_mtap2(ifp->if_bpf, &af, sizeof(af), m);
174
175 m->m_pkthdr.rcvif = ifp;
176
177 ifp->if_opackets++;
178 ifp->if_obytes += m->m_pkthdr.len;
179
180 m_freem(m);
181 return (0);
182}
183
184/* ARGSUSED */
185static void
186discrtrequest(int cmd, struct rtentry *rt, struct rt_addrinfo *info)
187{
188 RT_LOCK_ASSERT(rt);
| 31 */
32
33/*
34 * Discard interface driver for protocol testing and timing.
35 * (Based on the loopback.)
36 */
37
38#include <sys/param.h>
39#include <sys/systm.h>
40#include <sys/kernel.h>
41#include <sys/malloc.h>
42#include <sys/module.h>
43#include <sys/mbuf.h>
44#include <sys/socket.h>
45#include <sys/sockio.h>
46
47#include <net/if.h>
48#include <net/if_var.h>
49#include <net/if_clone.h>
50#include <net/if_types.h>
51#include <net/route.h>
52#include <net/bpf.h>
53
54#include "opt_inet.h"
55#include "opt_inet6.h"
56
57#ifdef TINY_DSMTU
58#define DSMTU (1024+512)
59#else
60#define DSMTU 65532
61#endif
62
63struct disc_softc {
64 struct ifnet *sc_ifp;
65};
66
67static int discoutput(struct ifnet *, struct mbuf *,
68 const struct sockaddr *, struct route *);
69static void discrtrequest(int, struct rtentry *, struct rt_addrinfo *);
70static int discioctl(struct ifnet *, u_long, caddr_t);
71static int disc_clone_create(struct if_clone *, int, caddr_t);
72static void disc_clone_destroy(struct ifnet *);
73
74static const char discname[] = "disc";
75static MALLOC_DEFINE(M_DISC, discname, "Discard interface");
76
77static struct if_clone *disc_cloner;
78
79static int
80disc_clone_create(struct if_clone *ifc, int unit, caddr_t params)
81{
82 struct ifnet *ifp;
83 struct disc_softc *sc;
84
85 sc = malloc(sizeof(struct disc_softc), M_DISC, M_WAITOK | M_ZERO);
86 ifp = sc->sc_ifp = if_alloc(IFT_LOOP);
87 if (ifp == NULL) {
88 free(sc, M_DISC);
89 return (ENOSPC);
90 }
91
92 ifp->if_softc = sc;
93 if_initname(ifp, discname, unit);
94 ifp->if_mtu = DSMTU;
95 /*
96 * IFF_LOOPBACK should not be removed from disc's flags because
97 * it controls what PF-specific routes are magically added when
98 * a network address is assigned to the interface. Things just
99 * won't work as intended w/o such routes because the output
100 * interface selection for a packet is totally route-driven.
101 * A valid alternative to IFF_LOOPBACK can be IFF_BROADCAST or
102 * IFF_POINTOPOINT, but it would result in different properties
103 * of the interface.
104 */
105 ifp->if_flags = IFF_LOOPBACK | IFF_MULTICAST;
106 ifp->if_drv_flags = IFF_DRV_RUNNING;
107 ifp->if_ioctl = discioctl;
108 ifp->if_output = discoutput;
109 ifp->if_hdrlen = 0;
110 ifp->if_addrlen = 0;
111 ifp->if_snd.ifq_maxlen = 20;
112 if_attach(ifp);
113 bpfattach(ifp, DLT_NULL, sizeof(u_int32_t));
114
115 return (0);
116}
117
118static void
119disc_clone_destroy(struct ifnet *ifp)
120{
121 struct disc_softc *sc;
122
123 sc = ifp->if_softc;
124
125 bpfdetach(ifp);
126 if_detach(ifp);
127 if_free(ifp);
128
129 free(sc, M_DISC);
130}
131
132static int
133disc_modevent(module_t mod, int type, void *data)
134{
135
136 switch (type) {
137 case MOD_LOAD:
138 disc_cloner = if_clone_simple(discname, disc_clone_create,
139 disc_clone_destroy, 0);
140 break;
141 case MOD_UNLOAD:
142 if_clone_detach(disc_cloner);
143 break;
144 default:
145 return (EOPNOTSUPP);
146 }
147 return (0);
148}
149
150static moduledata_t disc_mod = {
151 "if_disc",
152 disc_modevent,
153 NULL
154};
155
156DECLARE_MODULE(if_disc, disc_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
157
158static int
159discoutput(struct ifnet *ifp, struct mbuf *m, const struct sockaddr *dst,
160 struct route *ro)
161{
162 u_int32_t af;
163
164 M_ASSERTPKTHDR(m);
165
166 /* BPF writes need to be handled specially. */
167 if (dst->sa_family == AF_UNSPEC)
168 bcopy(dst->sa_data, &af, sizeof(af));
169 else
170 af = dst->sa_family;
171
172 if (bpf_peers_present(ifp->if_bpf))
173 bpf_mtap2(ifp->if_bpf, &af, sizeof(af), m);
174
175 m->m_pkthdr.rcvif = ifp;
176
177 ifp->if_opackets++;
178 ifp->if_obytes += m->m_pkthdr.len;
179
180 m_freem(m);
181 return (0);
182}
183
184/* ARGSUSED */
185static void
186discrtrequest(int cmd, struct rtentry *rt, struct rt_addrinfo *info)
187{
188 RT_LOCK_ASSERT(rt);
|