summaryrefslogtreecommitdiffstats
path: root/sys/net/raw_usrreq.c
blob: 47afb4fa828813d374fd8a6675ea88de135c1c53 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
/*-
 * Copyright (c) 1980, 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 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.
 * 4. 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.
 *
 *	@(#)raw_usrreq.c	8.1 (Berkeley) 6/10/93
 * $FreeBSD$
 */

#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/mutex.h>
#include <sys/priv.h>
#include <sys/protosw.h>
#include <sys/signalvar.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/sx.h>
#include <sys/systm.h>

#include <net/raw_cb.h>

MTX_SYSINIT(rawcb_mtx, &rawcb_mtx, "rawcb", MTX_DEF);

/*
 * Initialize raw connection block q.
 */
void
raw_init(void)
{

	LIST_INIT(&rawcb_list);
}

/*
 * Raw protocol input routine.  Find the socket associated with the packet(s)
 * and move them over.  If nothing exists for this packet, drop it.
 */
/*
 * Raw protocol interface.
 */
void
raw_input(struct mbuf *m0, struct sockproto *proto, struct sockaddr *src)
{
	struct rawcb *rp;
	struct mbuf *m = m0;
	struct socket *last;

	last = 0;
	mtx_lock(&rawcb_mtx);
	LIST_FOREACH(rp, &rawcb_list, list) {
		if (rp->rcb_proto.sp_family != proto->sp_family)
			continue;
		if (rp->rcb_proto.sp_protocol  &&
		    rp->rcb_proto.sp_protocol != proto->sp_protocol)
			continue;
		if (last) {
			struct mbuf *n;
			n = m_copy(m, 0, (int)M_COPYALL);
			if (n) {
				if (sbappendaddr(&last->so_rcv, src,
				    n, (struct mbuf *)0) == 0)
					/* should notify about lost packet */
					m_freem(n);
				else
					sorwakeup(last);
			}
		}
		last = rp->rcb_socket;
	}
	if (last) {
		if (sbappendaddr(&last->so_rcv, src,
		    m, (struct mbuf *)0) == 0)
			m_freem(m);
		else
			sorwakeup(last);
	} else
		m_freem(m);
	mtx_unlock(&rawcb_mtx);
}

/*ARGSUSED*/
void
raw_ctlinput(int cmd, struct sockaddr *arg, void *dummy)
{

	if (cmd < 0 || cmd >= PRC_NCMDS)
		return;
	/* INCOMPLETE */
}

static void
raw_uabort(struct socket *so)
{

	KASSERT(sotorawcb(so) != NULL, ("raw_uabort: rp == NULL"));

	soisdisconnected(so);
}

static void
raw_uclose(struct socket *so)
{

	KASSERT(sotorawcb(so) != NULL, ("raw_uabort: rp == NULL"));

	soisdisconnected(so);
}

/* pru_accept is EOPNOTSUPP */

static int
raw_uattach(struct socket *so, int proto, struct thread *td)
{
	int error;

	/*
	 * Implementors of raw sockets will already have allocated the PCB,
	 * so it must be non-NULL here.
	 */
	KASSERT(sotorawcb(so) != NULL, ("raw_uattach: so_pcb == NULL"));

	if (td != NULL) {
		error = priv_check(td, PRIV_NET_RAW);
		if (error)
			return (error);
	}
	return (raw_attach(so, proto));
}

static int
raw_ubind(struct socket *so, struct sockaddr *nam, struct thread *td)
{

	return (EINVAL);
}

static int
raw_uconnect(struct socket *so, struct sockaddr *nam, struct thread *td)
{

	return (EINVAL);
}

/* pru_connect2 is EOPNOTSUPP */
/* pru_control is EOPNOTSUPP */

static void
raw_udetach(struct socket *so)
{
	struct rawcb *rp = sotorawcb(so);

	KASSERT(rp != NULL, ("raw_udetach: rp == NULL"));

	raw_detach(rp);
}

static int
raw_udisconnect(struct socket *so)
{

	KASSERT(sotorawcb(so) != NULL, ("raw_udisconnect: rp == NULL"));

	return (ENOTCONN);
}

/* pru_listen is EOPNOTSUPP */

static int
raw_upeeraddr(struct socket *so, struct sockaddr **nam)
{

	KASSERT(sotorawcb(so) != NULL, ("raw_upeeraddr: rp == NULL"));

	return (ENOTCONN);
}

/* pru_rcvd is EOPNOTSUPP */
/* pru_rcvoob is EOPNOTSUPP */

static int
raw_usend(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam,
    struct mbuf *control, struct thread *td)
{

	KASSERT(sotorawcb(so) != NULL, ("raw_usend: rp == NULL"));

	if ((flags & PRUS_OOB) || (control && control->m_len)) {
		/* XXXRW: Should control also be freed here? */
		if (m != NULL)
			m_freem(m);
		return (EOPNOTSUPP);
	}

	/*
	 * For historical (bad?) reasons, we effectively ignore the address
	 * argument to sendto(2).  Perhaps we should return an error instead?
	 */
	return ((*so->so_proto->pr_output)(m, so));
}

/* pru_sense is null */

static int
raw_ushutdown(struct socket *so)
{

	KASSERT(sotorawcb(so) != NULL, ("raw_ushutdown: rp == NULL"));

	socantsendmore(so);
	return (0);
}

static int
raw_usockaddr(struct socket *so, struct sockaddr **nam)
{

	KASSERT(sotorawcb(so) != NULL, ("raw_usockaddr: rp == NULL"));

	return (EINVAL);
}

struct pr_usrreqs raw_usrreqs = {
	.pru_abort =		raw_uabort,
	.pru_attach =		raw_uattach,
	.pru_bind =		raw_ubind,
	.pru_connect =		raw_uconnect,
	.pru_detach =		raw_udetach, 
	.pru_disconnect =	raw_udisconnect,
	.pru_peeraddr =		raw_upeeraddr,
	.pru_send =		raw_usend,
	.pru_shutdown =		raw_ushutdown,
	.pru_sockaddr =		raw_usockaddr,
	.pru_close =		raw_uclose,
};
OpenPOWER on IntegriCloud