* Remove (void) casts for discarded return values.
[dragonfly.git] / sys / net / raw_usrreq.c
CommitLineData
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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: src/sys/net/raw_usrreq.c,v 1.18 1999/08/28 00:48:28 peter Exp $
590b8cd4 35 * $DragonFly: src/sys/net/raw_usrreq.c,v 1.10 2005/01/26 23:09:57 hsu Exp $
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36 */
37
38#include <sys/param.h>
39#include <sys/systm.h>
40#include <sys/mbuf.h>
41#include <sys/proc.h>
42#include <sys/protosw.h>
43#include <sys/socket.h>
44#include <sys/socketvar.h>
45
46#include <net/raw_cb.h>
47
48/*
49 * Initialize raw connection block q.
50 */
51void
52raw_init()
53{
54 LIST_INIT(&rawcb_list);
55}
56
57
58/*
59 * Raw protocol input routine. Find the socket
60 * associated with the packet(s) and move them over. If
61 * nothing exists for this packet, drop it.
62 */
63/*
64 * Raw protocol interface.
65 */
66void
590b8cd4
JH
67raw_input(struct mbuf *m0, struct sockproto *proto, const struct sockaddr *src,
68 const struct sockaddr *dst)
984263bc 69{
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70 struct rawcb *rp;
71 struct mbuf *m = m0;
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72 struct socket *last;
73
590b8cd4 74 last = NULL;
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75 LIST_FOREACH(rp, &rawcb_list, list) {
76 if (rp->rcb_proto.sp_family != proto->sp_family)
77 continue;
78 if (rp->rcb_proto.sp_protocol &&
79 rp->rcb_proto.sp_protocol != proto->sp_protocol)
80 continue;
81 /*
82 * We assume the lower level routines have
83 * placed the address in a canonical format
84 * suitable for a structure comparison.
85 *
86 * Note that if the lengths are not the same
87 * the comparison will fail at the first byte.
88 */
0c3c561c 89 if (rp->rcb_laddr && !sa_equal(rp->rcb_laddr, dst))
984263bc 90 continue;
0c3c561c 91 if (rp->rcb_faddr && !sa_equal(rp->rcb_faddr, src))
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92 continue;
93 if (last) {
94 struct mbuf *n;
f23061d4
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95
96 n = m_copypacket(m, MB_DONTWAIT);
590b8cd4 97 if (n != NULL) {
f23061d4 98 if (sbappendaddr(&last->so_rcv, src, n,
590b8cd4 99 (struct mbuf *)0) == 0) {
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100 /* should notify about lost packet */
101 m_freem(n);
590b8cd4 102 } else {
984263bc 103 sorwakeup(last);
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104 }
105 }
106 }
107 last = rp->rcb_socket;
108 }
109 if (last) {
f23061d4 110 if (sbappendaddr(&last->so_rcv, src, m, (struct mbuf *)0) == 0)
984263bc 111 m_freem(m);
590b8cd4 112 else
984263bc 113 sorwakeup(last);
590b8cd4 114 } else {
984263bc 115 m_freem(m);
590b8cd4 116 }
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117}
118
119/*ARGSUSED*/
120void
121raw_ctlinput(cmd, arg, dummy)
122 int cmd;
123 struct sockaddr *arg;
124 void *dummy;
125{
126
127 if (cmd < 0 || cmd > PRC_NCMDS)
128 return;
129 /* INCOMPLETE */
130}
131
132static int
133raw_uabort(struct socket *so)
134{
135 struct rawcb *rp = sotorawcb(so);
136
590b8cd4 137 if (rp == NULL)
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138 return EINVAL;
139 raw_disconnect(rp);
140 sofree(so);
141 soisdisconnected(so);
142 return 0;
143}
144
145/* pru_accept is EOPNOTSUPP */
146
147static int
e4700d00 148raw_uattach(struct socket *so, int proto, struct pru_attach_info *ai)
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149{
150 struct rawcb *rp = sotorawcb(so);
151 int error;
152
590b8cd4 153 if (rp == NULL)
984263bc 154 return EINVAL;
e4700d00 155 if ((error = suser_cred(ai->p_ucred, NULL_CRED_OKAY)) != 0)
984263bc 156 return error;
e4700d00 157 return raw_attach(so, proto, ai->sb_rlimit);
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158}
159
160static int
dadab5e9 161raw_ubind(struct socket *so, struct sockaddr *nam, struct thread *td)
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162{
163 return EINVAL;
164}
165
166static int
dadab5e9 167raw_uconnect(struct socket *so, struct sockaddr *nam, struct thread *td)
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168{
169 return EINVAL;
170}
171
172/* pru_connect2 is EOPNOTSUPP */
173/* pru_control is EOPNOTSUPP */
174
175static int
176raw_udetach(struct socket *so)
177{
178 struct rawcb *rp = sotorawcb(so);
179
590b8cd4 180 if (rp == NULL)
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181 return EINVAL;
182
183 raw_detach(rp);
184 return 0;
185}
186
187static int
188raw_udisconnect(struct socket *so)
189{
190 struct rawcb *rp = sotorawcb(so);
191
590b8cd4 192 if (rp == NULL)
984263bc 193 return EINVAL;
590b8cd4 194 if (rp->rcb_faddr == NULL) {
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195 return ENOTCONN;
196 }
197 raw_disconnect(rp);
198 soisdisconnected(so);
199 return 0;
200}
201
202/* pru_listen is EOPNOTSUPP */
203
204static int
205raw_upeeraddr(struct socket *so, struct sockaddr **nam)
206{
207 struct rawcb *rp = sotorawcb(so);
208
590b8cd4 209 if (rp == NULL)
984263bc 210 return EINVAL;
590b8cd4 211 if (rp->rcb_faddr == NULL) {
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212 return ENOTCONN;
213 }
cfa2ba21 214 *nam = dup_sockaddr(rp->rcb_faddr);
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215 return 0;
216}
217
218/* pru_rcvd is EOPNOTSUPP */
219/* pru_rcvoob is EOPNOTSUPP */
220
221static int
222raw_usend(struct socket *so, int flags, struct mbuf *m,
dadab5e9 223 struct sockaddr *nam, struct mbuf *control, struct thread *td)
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224{
225 int error;
226 struct rawcb *rp = sotorawcb(so);
47e78ae8 227 struct pr_output_info oi;
984263bc 228
590b8cd4 229 if (rp == NULL) {
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230 error = EINVAL;
231 goto release;
232 }
233
234 if (flags & PRUS_OOB) {
235 error = EOPNOTSUPP;
236 goto release;
237 }
238
239 if (control && control->m_len) {
240 error = EOPNOTSUPP;
241 goto release;
242 }
243 if (nam) {
244 if (rp->rcb_faddr) {
245 error = EISCONN;
246 goto release;
247 }
248 rp->rcb_faddr = nam;
590b8cd4 249 } else if (rp->rcb_faddr == NULL) {
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250 error = ENOTCONN;
251 goto release;
252 }
47e78ae8
JH
253 oi.p_pid = td->td_proc->p_pid;
254 error = (*so->so_proto->pr_output)(m, so, &oi);
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255 m = NULL;
256 if (nam)
590b8cd4 257 rp->rcb_faddr = NULL;
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258release:
259 if (m != NULL)
260 m_freem(m);
261 return (error);
262}
263
264/* pru_sense is null */
265
266static int
267raw_ushutdown(struct socket *so)
268{
269 struct rawcb *rp = sotorawcb(so);
270
590b8cd4 271 if (rp == NULL)
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272 return EINVAL;
273 socantsendmore(so);
274 return 0;
275}
276
277static int
278raw_usockaddr(struct socket *so, struct sockaddr **nam)
279{
280 struct rawcb *rp = sotorawcb(so);
281
590b8cd4 282 if (rp == NULL)
984263bc 283 return EINVAL;
590b8cd4 284 if (rp->rcb_laddr == NULL)
984263bc 285 return EINVAL;
cfa2ba21 286 *nam = dup_sockaddr(rp->rcb_laddr);
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287 return 0;
288}
289
290struct pr_usrreqs raw_usrreqs = {
291 raw_uabort, pru_accept_notsupp, raw_uattach, raw_ubind, raw_uconnect,
292 pru_connect2_notsupp, pru_control_notsupp, raw_udetach,
293 raw_udisconnect, pru_listen_notsupp, raw_upeeraddr, pru_rcvd_notsupp,
294 pru_rcvoob_notsupp, raw_usend, pru_sense_null, raw_ushutdown,
295 raw_usockaddr, sosend, soreceive, sopoll
296};