devfs - Let devfs assume degenerate knotes when a device goes away
[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 $
47db7f9b 35 * $DragonFly: src/sys/net/raw_usrreq.c,v 1.14 2007/06/24 20:00:00 dillon 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>
895c1f85 42#include <sys/priv.h>
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43#include <sys/protosw.h>
44#include <sys/socket.h>
45#include <sys/socketvar.h>
46
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47#include <sys/socketvar2.h>
48
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49#include <net/raw_cb.h>
50
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51
52static struct lwkt_token raw_token = LWKT_TOKEN_MP_INITIALIZER(raw_token);
53
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54/*
55 * Initialize raw connection block q.
56 */
57void
3bf25ce1 58raw_init(void)
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59{
60 LIST_INIT(&rawcb_list);
61}
62
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63/************************************************************************
64 * RAW PROTOCOL INTERFACE *
65 ************************************************************************/
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66
67/*
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68 * Raw protocol input routine. Find the socket associated with the packet(s)
69 * and move them over. If nothing exists for this packet, drop it. This
70 * routine is indirect called via rts_input() and will be serialized on
71 * cpu 0.
72 *
73 * Most other raw protocol interface functions are also serialized XXX.
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74 */
75void
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76raw_input(struct mbuf *m0, const struct sockproto *proto,
77 const struct sockaddr *src, const struct sockaddr *dst,
78 const struct rawcb *skip)
984263bc 79{
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80 struct rawcb *rp;
81 struct mbuf *m = m0;
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82 struct socket *last;
83
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84 lwkt_gettoken(&raw_token);
85
590b8cd4 86 last = NULL;
984263bc 87 LIST_FOREACH(rp, &rawcb_list, list) {
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88 if (rp == skip)
89 continue;
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90 if (rp->rcb_proto.sp_family != proto->sp_family)
91 continue;
92 if (rp->rcb_proto.sp_protocol &&
93 rp->rcb_proto.sp_protocol != proto->sp_protocol)
94 continue;
95 /*
96 * We assume the lower level routines have
97 * placed the address in a canonical format
98 * suitable for a structure comparison.
99 *
100 * Note that if the lengths are not the same
101 * the comparison will fail at the first byte.
102 */
0c3c561c 103 if (rp->rcb_laddr && !sa_equal(rp->rcb_laddr, dst))
984263bc 104 continue;
0c3c561c 105 if (rp->rcb_faddr && !sa_equal(rp->rcb_faddr, src))
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106 continue;
107 if (last) {
108 struct mbuf *n;
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109
110 n = m_copypacket(m, MB_DONTWAIT);
590b8cd4 111 if (n != NULL) {
6d49aa6f 112 if (ssb_appendaddr(&last->so_rcv, src, n,
60233e58 113 NULL) == 0) {
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114 /* should notify about lost packet */
115 m_freem(n);
590b8cd4 116 } else {
984263bc 117 sorwakeup(last);
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118 }
119 }
120 }
121 last = rp->rcb_socket;
122 }
123 if (last) {
60233e58 124 if (ssb_appendaddr(&last->so_rcv, src, m, NULL) == 0)
984263bc 125 m_freem(m);
590b8cd4 126 else
984263bc 127 sorwakeup(last);
590b8cd4 128 } else {
984263bc 129 m_freem(m);
590b8cd4 130 }
e6318d16 131 lwkt_reltoken(&raw_token);
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132}
133
134/*ARGSUSED*/
135void
3bf25ce1 136raw_ctlinput(int cmd, struct sockaddr *arg, void *dummy)
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137{
138
139 if (cmd < 0 || cmd > PRC_NCMDS)
140 return;
141 /* INCOMPLETE */
142}
143
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144/*
145 * NOTE: (so) is referenced from soabort*() and netmsg_pru_abort()
146 * will sofree() it when we return.
147 */
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148static int
149raw_uabort(struct socket *so)
150{
151 struct rawcb *rp = sotorawcb(so);
152
590b8cd4 153 if (rp == NULL)
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154 return EINVAL;
155 raw_disconnect(rp);
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156 soisdisconnected(so);
157 return 0;
158}
159
160/* pru_accept is EOPNOTSUPP */
161
162static int
e4700d00 163raw_uattach(struct socket *so, int proto, struct pru_attach_info *ai)
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164{
165 struct rawcb *rp = sotorawcb(so);
166 int error;
167
590b8cd4 168 if (rp == NULL)
984263bc 169 return EINVAL;
895c1f85 170 if ((error = priv_check_cred(ai->p_ucred, PRIV_ROOT, NULL_CRED_OKAY)) != 0)
984263bc 171 return error;
e4700d00 172 return raw_attach(so, proto, ai->sb_rlimit);
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173}
174
175static int
dadab5e9 176raw_ubind(struct socket *so, struct sockaddr *nam, struct thread *td)
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177{
178 return EINVAL;
179}
180
181static int
dadab5e9 182raw_uconnect(struct socket *so, struct sockaddr *nam, struct thread *td)
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183{
184 return EINVAL;
185}
186
187/* pru_connect2 is EOPNOTSUPP */
188/* pru_control is EOPNOTSUPP */
189
190static int
191raw_udetach(struct socket *so)
192{
193 struct rawcb *rp = sotorawcb(so);
194
590b8cd4 195 if (rp == NULL)
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196 return EINVAL;
197
198 raw_detach(rp);
199 return 0;
200}
201
202static int
203raw_udisconnect(struct socket *so)
204{
205 struct rawcb *rp = sotorawcb(so);
206
590b8cd4 207 if (rp == NULL)
984263bc 208 return EINVAL;
590b8cd4 209 if (rp->rcb_faddr == NULL) {
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210 return ENOTCONN;
211 }
6cef7136 212 soreference(so);
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213 raw_disconnect(rp);
214 soisdisconnected(so);
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215 sofree(so);
216
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217 return 0;
218}
219
220/* pru_listen is EOPNOTSUPP */
221
222static int
223raw_upeeraddr(struct socket *so, struct sockaddr **nam)
224{
225 struct rawcb *rp = sotorawcb(so);
226
590b8cd4 227 if (rp == NULL)
984263bc 228 return EINVAL;
590b8cd4 229 if (rp->rcb_faddr == NULL) {
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230 return ENOTCONN;
231 }
cfa2ba21 232 *nam = dup_sockaddr(rp->rcb_faddr);
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233 return 0;
234}
235
236/* pru_rcvd is EOPNOTSUPP */
237/* pru_rcvoob is EOPNOTSUPP */
238
239static int
240raw_usend(struct socket *so, int flags, struct mbuf *m,
dadab5e9 241 struct sockaddr *nam, struct mbuf *control, struct thread *td)
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242{
243 int error;
244 struct rawcb *rp = sotorawcb(so);
47e78ae8 245 struct pr_output_info oi;
984263bc 246
590b8cd4 247 if (rp == NULL) {
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248 error = EINVAL;
249 goto release;
250 }
251
252 if (flags & PRUS_OOB) {
253 error = EOPNOTSUPP;
254 goto release;
255 }
256
257 if (control && control->m_len) {
258 error = EOPNOTSUPP;
259 goto release;
260 }
261 if (nam) {
262 if (rp->rcb_faddr) {
263 error = EISCONN;
264 goto release;
265 }
266 rp->rcb_faddr = nam;
590b8cd4 267 } else if (rp->rcb_faddr == NULL) {
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268 error = ENOTCONN;
269 goto release;
270 }
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271 oi.p_pid = td->td_proc->p_pid;
272 error = (*so->so_proto->pr_output)(m, so, &oi);
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273 m = NULL;
274 if (nam)
590b8cd4 275 rp->rcb_faddr = NULL;
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276release:
277 if (m != NULL)
278 m_freem(m);
279 return (error);
280}
281
282/* pru_sense is null */
283
284static int
285raw_ushutdown(struct socket *so)
286{
287 struct rawcb *rp = sotorawcb(so);
288
590b8cd4 289 if (rp == NULL)
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290 return EINVAL;
291 socantsendmore(so);
292 return 0;
293}
294
295static int
296raw_usockaddr(struct socket *so, struct sockaddr **nam)
297{
298 struct rawcb *rp = sotorawcb(so);
299
590b8cd4 300 if (rp == NULL)
984263bc 301 return EINVAL;
590b8cd4 302 if (rp->rcb_laddr == NULL)
984263bc 303 return EINVAL;
cfa2ba21 304 *nam = dup_sockaddr(rp->rcb_laddr);
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305 return 0;
306}
307
308struct pr_usrreqs raw_usrreqs = {
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309 .pru_abort = raw_uabort,
310 .pru_accept = pru_accept_notsupp,
311 .pru_attach = raw_uattach,
312 .pru_bind = raw_ubind,
313 .pru_connect = raw_uconnect,
314 .pru_connect2 = pru_connect2_notsupp,
315 .pru_control = pru_control_notsupp,
316 .pru_detach = raw_udetach,
317 .pru_disconnect = raw_udisconnect,
318 .pru_listen = pru_listen_notsupp,
319 .pru_peeraddr = raw_upeeraddr,
320 .pru_rcvd = pru_rcvd_notsupp,
321 .pru_rcvoob = pru_rcvoob_notsupp,
322 .pru_send = raw_usend,
323 .pru_sense = pru_sense_null,
324 .pru_shutdown = raw_ushutdown,
325 .pru_sockaddr = raw_usockaddr,
326 .pru_sosend = sosend,
8b5c39bb 327 .pru_soreceive = soreceive
984263bc 328};