raw_usrreq.c revision 126425 
1/*
2 * Copyright (c) 1980, 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 *	@(#)raw_usrreq.c	8.1 (Berkeley) 6/10/93
34 * $FreeBSD: head/sys/net/raw_usrreq.c 126425 2004-03-01 03:14:23Z rwatson $
35 */
36
37#include <sys/param.h>
38#include <sys/lock.h>
39#include <sys/malloc.h>
40#include <sys/mbuf.h>
41#include <sys/protosw.h>
42#include <sys/signalvar.h>
43#include <sys/socket.h>
44#include <sys/socketvar.h>
45#include <sys/sx.h>
46#include <sys/systm.h>
47
48#include <net/raw_cb.h>
49
50/*
51 * Initialize raw connection block q.
52 */
53void
54raw_init()
55{
56	LIST_INIT(&rawcb_list);
57}
58
59
60/*
61 * Raw protocol input routine.  Find the socket
62 * associated with the packet(s) and move them over.  If
63 * nothing exists for this packet, drop it.
64 */
65/*
66 * Raw protocol interface.
67 */
68void
69raw_input(m0, proto, src, dst)
70	struct mbuf *m0;
71	register struct sockproto *proto;
72	struct sockaddr *src, *dst;
73{
74	register struct rawcb *rp;
75	register struct mbuf *m = m0;
76	struct socket *last;
77
78	last = 0;
79	LIST_FOREACH(rp, &rawcb_list, list) {
80		if (rp->rcb_proto.sp_family != proto->sp_family)
81			continue;
82		if (rp->rcb_proto.sp_protocol  &&
83		    rp->rcb_proto.sp_protocol != proto->sp_protocol)
84			continue;
85		/*
86		 * We assume the lower level routines have
87		 * placed the address in a canonical format
88		 * suitable for a structure comparison.
89		 *
90		 * Note that if the lengths are not the same
91		 * the comparison will fail at the first byte.
92		 */
93#define	equal(a1, a2) \
94  (bcmp((caddr_t)(a1), (caddr_t)(a2), a1->sa_len) == 0)
95		if (rp->rcb_laddr && !equal(rp->rcb_laddr, dst))
96			continue;
97		if (rp->rcb_faddr && !equal(rp->rcb_faddr, src))
98			continue;
99		if (last) {
100			struct mbuf *n;
101			n = m_copy(m, 0, (int)M_COPYALL);
102			if (n) {
103				if (sbappendaddr(&last->so_rcv, src,
104				    n, (struct mbuf *)0) == 0)
105					/* should notify about lost packet */
106					m_freem(n);
107				else {
108					sorwakeup(last);
109				}
110			}
111		}
112		last = rp->rcb_socket;
113	}
114	if (last) {
115		if (sbappendaddr(&last->so_rcv, src,
116		    m, (struct mbuf *)0) == 0)
117			m_freem(m);
118		else {
119			sorwakeup(last);
120		}
121	} else
122		m_freem(m);
123}
124
125/*ARGSUSED*/
126void
127raw_ctlinput(cmd, arg, dummy)
128	int cmd;
129	struct sockaddr *arg;
130	void *dummy;
131{
132
133	if (cmd < 0 || cmd >= PRC_NCMDS)
134		return;
135	/* INCOMPLETE */
136}
137
138static int
139raw_uabort(struct socket *so)
140{
141	struct rawcb *rp = sotorawcb(so);
142
143	if (rp == 0)
144		return EINVAL;
145	raw_disconnect(rp);
146	sotryfree(so);
147	soisdisconnected(so);	/* XXX huh? called after the sofree()? */
148	return 0;
149}
150
151/* pru_accept is EOPNOTSUPP */
152
153static int
154raw_uattach(struct socket *so, int proto, struct thread *td)
155{
156	struct rawcb *rp = sotorawcb(so);
157	int error;
158
159	if (rp == 0)
160		return EINVAL;
161	if (td && (error = suser(td)) != 0)
162		return error;
163	return raw_attach(so, proto);
164}
165
166static int
167raw_ubind(struct socket *so, struct sockaddr *nam, struct thread *td)
168{
169	return EINVAL;
170}
171
172static int
173raw_uconnect(struct socket *so, struct sockaddr *nam, struct thread *td)
174{
175	return EINVAL;
176}
177
178/* pru_connect2 is EOPNOTSUPP */
179/* pru_control is EOPNOTSUPP */
180
181static int
182raw_udetach(struct socket *so)
183{
184	struct rawcb *rp = sotorawcb(so);
185
186	if (rp == 0)
187		return EINVAL;
188
189	raw_detach(rp);
190	return 0;
191}
192
193static int
194raw_udisconnect(struct socket *so)
195{
196	struct rawcb *rp = sotorawcb(so);
197
198	if (rp == 0)
199		return EINVAL;
200	if (rp->rcb_faddr == 0) {
201		return ENOTCONN;
202	}
203	raw_disconnect(rp);
204	soisdisconnected(so);
205	return 0;
206}
207
208/* pru_listen is EOPNOTSUPP */
209
210static int
211raw_upeeraddr(struct socket *so, struct sockaddr **nam)
212{
213	struct rawcb *rp = sotorawcb(so);
214
215	if (rp == 0)
216		return EINVAL;
217	if (rp->rcb_faddr == 0) {
218		return ENOTCONN;
219	}
220	*nam = sodupsockaddr(rp->rcb_faddr, M_WAITOK);
221	return 0;
222}
223
224/* pru_rcvd is EOPNOTSUPP */
225/* pru_rcvoob is EOPNOTSUPP */
226
227static int
228raw_usend(struct socket *so, int flags, struct mbuf *m,
229	  struct sockaddr *nam, struct mbuf *control, struct thread *td)
230{
231	int error;
232	struct rawcb *rp = sotorawcb(so);
233
234	if (rp == 0) {
235		error = EINVAL;
236		goto release;
237	}
238
239	if (flags & PRUS_OOB) {
240		error = EOPNOTSUPP;
241		goto release;
242	}
243
244	if (control && control->m_len) {
245		error = EOPNOTSUPP;
246		goto release;
247	}
248	if (nam) {
249		if (rp->rcb_faddr) {
250			error = EISCONN;
251			goto release;
252		}
253		rp->rcb_faddr = nam;
254	} else if (rp->rcb_faddr == 0) {
255		error = ENOTCONN;
256		goto release;
257	}
258	error = (*so->so_proto->pr_output)(m, so);
259	m = NULL;
260	if (nam)
261		rp->rcb_faddr = 0;
262release:
263	if (m != NULL)
264		m_freem(m);
265	return (error);
266}
267
268/* pru_sense is null */
269
270static int
271raw_ushutdown(struct socket *so)
272{
273	struct rawcb *rp = sotorawcb(so);
274
275	if (rp == 0)
276		return EINVAL;
277	socantsendmore(so);
278	return 0;
279}
280
281static int
282raw_usockaddr(struct socket *so, struct sockaddr **nam)
283{
284	struct rawcb *rp = sotorawcb(so);
285
286	if (rp == 0)
287		return EINVAL;
288	if (rp->rcb_laddr == 0)
289		return EINVAL;
290	*nam = sodupsockaddr(rp->rcb_laddr, M_WAITOK);
291	return 0;
292}
293
294struct pr_usrreqs raw_usrreqs = {
295	raw_uabort, pru_accept_notsupp, raw_uattach, raw_ubind, raw_uconnect,
296	pru_connect2_notsupp, pru_control_notsupp, raw_udetach,
297	raw_udisconnect, pru_listen_notsupp, raw_upeeraddr, pru_rcvd_notsupp,
298	pru_rcvoob_notsupp, raw_usend, pru_sense_null, raw_ushutdown,
299	raw_usockaddr, sosend, soreceive, sopoll, pru_sosetlabel_null
300};
301