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 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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
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 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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 * $FreeBSD: head/sys/net/if_disc.c 54263 1999-12-07 17:39:16Z shin $
| 34 * $FreeBSD: head/sys/net/if_disc.c 71862 2001-01-31 07:58:58Z peter $
|
35 */
36
37/*
38 * Discard interface driver for protocol testing and timing.
39 * (Based on the loopback.)
40 */
41
42#include <sys/param.h>
43#include <sys/systm.h>
44#include <sys/kernel.h>
| 35 */
36
37/*
38 * Discard interface driver for protocol testing and timing.
39 * (Based on the loopback.)
40 */
41
42#include <sys/param.h>
43#include <sys/systm.h>
44#include <sys/kernel.h>
|
| 45#include <sys/module.h>
|
45#include <sys/mbuf.h>
46#include <sys/socket.h>
47#include <sys/sockio.h>
48
49#include <net/if.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
| 46#include <sys/mbuf.h>
47#include <sys/socket.h>
48#include <sys/sockio.h>
49
50#include <net/if.h>
51#include <net/if_types.h>
52#include <net/route.h>
53#include <net/bpf.h>
54
55#include "opt_inet.h"
56#include "opt_inet6.h"
57
58#ifdef TINY_DSMTU
59#define DSMTU (1024+512)
60#else
61#define DSMTU 65532
62#endif
63
|
63static void discattach __P((void *dummy));
64PSEUDO_SET(discattach, if_disc);
| 64static void discattach __P((void));
|
65
66static struct ifnet discif;
67static int discoutput(struct ifnet *, struct mbuf *, struct sockaddr *,
68 struct rtentry *);
69static void discrtrequest(int cmd, struct rtentry *rt, struct sockaddr *sa);
70static int discioctl(struct ifnet *, u_long, caddr_t);
71
72/* ARGSUSED */
73static void
| 65
66static struct ifnet discif;
67static int discoutput(struct ifnet *, struct mbuf *, struct sockaddr *,
68 struct rtentry *);
69static void discrtrequest(int cmd, struct rtentry *rt, struct sockaddr *sa);
70static int discioctl(struct ifnet *, u_long, caddr_t);
71
72/* ARGSUSED */
73static void
|
74discattach(dummy)
75 void *dummy;
| 74discattach()
|
76{
77 register struct ifnet *ifp = &discif;
78
79 ifp->if_name = "ds";
80 ifp->if_mtu = DSMTU;
81 ifp->if_flags = IFF_LOOPBACK | IFF_MULTICAST;
82 ifp->if_ioctl = discioctl;
83 ifp->if_output = discoutput;
84 ifp->if_type = IFT_LOOP;
85 ifp->if_hdrlen = 0;
86 ifp->if_addrlen = 0;
87 ifp->if_snd.ifq_maxlen = 20;
88 if_attach(ifp);
89 bpfattach(ifp, DLT_NULL, sizeof(u_int));
90}
91
92static int
| 75{
76 register struct ifnet *ifp = &discif;
77
78 ifp->if_name = "ds";
79 ifp->if_mtu = DSMTU;
80 ifp->if_flags = IFF_LOOPBACK | IFF_MULTICAST;
81 ifp->if_ioctl = discioctl;
82 ifp->if_output = discoutput;
83 ifp->if_type = IFT_LOOP;
84 ifp->if_hdrlen = 0;
85 ifp->if_addrlen = 0;
86 ifp->if_snd.ifq_maxlen = 20;
87 if_attach(ifp);
88 bpfattach(ifp, DLT_NULL, sizeof(u_int));
89}
90
91static int
|
| 92disc_modevent(module_t mod, int type, void *data)
93{
94 switch (type) {
95 case MOD_LOAD:
96 discattach();
97 break;
98 case MOD_UNLOAD:
99 printf("if_disc module unload - not possible for this module type\n");
100 return EINVAL;
101 }
102 return 0;
103}
104
105static moduledata_t disc_mod = {
106 "if_disc",
107 disc_modevent,
108 NULL
109};
110
111DECLARE_MODULE(if_disc, disc_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
112
113static int
|
93discoutput(ifp, m, dst, rt)
94 struct ifnet *ifp;
95 register struct mbuf *m;
96 struct sockaddr *dst;
97 register struct rtentry *rt;
98{
99 if ((m->m_flags & M_PKTHDR) == 0)
100 panic("discoutput no HDR");
101 /* BPF write needs to be handled specially */
102 if (dst->sa_family == AF_UNSPEC) {
103 dst->sa_family = *(mtod(m, int *));
104 m->m_len -= sizeof(int);
105 m->m_pkthdr.len -= sizeof(int);
106 m->m_data += sizeof(int);
107 }
108
109 if (discif.if_bpf) {
110 /*
111 * We need to prepend the address family as
112 * a four byte field. Cons up a dummy header
113 * to pacify bpf. This is safe because bpf
114 * will only read from the mbuf (i.e., it won't
115 * try to free it or keep a pointer a to it).
116 */
117 struct mbuf m0;
118 u_int af = dst->sa_family;
119
120 m0.m_next = m;
121 m0.m_len = 4;
122 m0.m_data = (char *)⁡
123
124 bpf_mtap(&discif, &m0);
125 }
126 m->m_pkthdr.rcvif = ifp;
127
128 ifp->if_opackets++;
129 ifp->if_obytes += m->m_pkthdr.len;
130
131 m_freem(m);
132 return 0;
133}
134
135/* ARGSUSED */
136static void
137discrtrequest(cmd, rt, sa)
138 int cmd;
139 struct rtentry *rt;
140 struct sockaddr *sa;
141{
142 if (rt)
143 rt->rt_rmx.rmx_mtu = DSMTU;
144}
145
146/*
147 * Process an ioctl request.
148 */
149/* ARGSUSED */
150static int
151discioctl(ifp, cmd, data)
152 register struct ifnet *ifp;
153 u_long cmd;
154 caddr_t data;
155{
156 register struct ifaddr *ifa;
157 register struct ifreq *ifr = (struct ifreq *)data;
158 register int error = 0;
159
160 switch (cmd) {
161
162 case SIOCSIFADDR:
163 ifp->if_flags |= IFF_UP;
164 ifa = (struct ifaddr *)data;
165 if (ifa != 0)
166 ifa->ifa_rtrequest = discrtrequest;
167 /*
168 * Everything else is done at a higher level.
169 */
170 break;
171
172 case SIOCADDMULTI:
173 case SIOCDELMULTI:
174 if (ifr == 0) {
175 error = EAFNOSUPPORT; /* XXX */
176 break;
177 }
178 switch (ifr->ifr_addr.sa_family) {
179
180#ifdef INET
181 case AF_INET:
182 break;
183#endif
184#ifdef INET6
185 case AF_INET6:
186 break;
187#endif
188
189 default:
190 error = EAFNOSUPPORT;
191 break;
192 }
193 break;
194
195 case SIOCSIFMTU:
196 ifp->if_mtu = ifr->ifr_mtu;
197 break;
198
199 default:
200 error = EINVAL;
201 }
202 return (error);
203}
| 114discoutput(ifp, m, dst, rt)
115 struct ifnet *ifp;
116 register struct mbuf *m;
117 struct sockaddr *dst;
118 register struct rtentry *rt;
119{
120 if ((m->m_flags & M_PKTHDR) == 0)
121 panic("discoutput no HDR");
122 /* BPF write needs to be handled specially */
123 if (dst->sa_family == AF_UNSPEC) {
124 dst->sa_family = *(mtod(m, int *));
125 m->m_len -= sizeof(int);
126 m->m_pkthdr.len -= sizeof(int);
127 m->m_data += sizeof(int);
128 }
129
130 if (discif.if_bpf) {
131 /*
132 * We need to prepend the address family as
133 * a four byte field. Cons up a dummy header
134 * to pacify bpf. This is safe because bpf
135 * will only read from the mbuf (i.e., it won't
136 * try to free it or keep a pointer a to it).
137 */
138 struct mbuf m0;
139 u_int af = dst->sa_family;
140
141 m0.m_next = m;
142 m0.m_len = 4;
143 m0.m_data = (char *)⁡
144
145 bpf_mtap(&discif, &m0);
146 }
147 m->m_pkthdr.rcvif = ifp;
148
149 ifp->if_opackets++;
150 ifp->if_obytes += m->m_pkthdr.len;
151
152 m_freem(m);
153 return 0;
154}
155
156/* ARGSUSED */
157static void
158discrtrequest(cmd, rt, sa)
159 int cmd;
160 struct rtentry *rt;
161 struct sockaddr *sa;
162{
163 if (rt)
164 rt->rt_rmx.rmx_mtu = DSMTU;
165}
166
167/*
168 * Process an ioctl request.
169 */
170/* ARGSUSED */
171static int
172discioctl(ifp, cmd, data)
173 register struct ifnet *ifp;
174 u_long cmd;
175 caddr_t data;
176{
177 register struct ifaddr *ifa;
178 register struct ifreq *ifr = (struct ifreq *)data;
179 register int error = 0;
180
181 switch (cmd) {
182
183 case SIOCSIFADDR:
184 ifp->if_flags |= IFF_UP;
185 ifa = (struct ifaddr *)data;
186 if (ifa != 0)
187 ifa->ifa_rtrequest = discrtrequest;
188 /*
189 * Everything else is done at a higher level.
190 */
191 break;
192
193 case SIOCADDMULTI:
194 case SIOCDELMULTI:
195 if (ifr == 0) {
196 error = EAFNOSUPPORT; /* XXX */
197 break;
198 }
199 switch (ifr->ifr_addr.sa_family) {
200
201#ifdef INET
202 case AF_INET:
203 break;
204#endif
205#ifdef INET6
206 case AF_INET6:
207 break;
208#endif
209
210 default:
211 error = EAFNOSUPPORT;
212 break;
213 }
214 break;
215
216 case SIOCSIFMTU:
217 ifp->if_mtu = ifr->ifr_mtu;
218 break;
219
220 default:
221 error = EINVAL;
222 }
223 return (error);
224}
|