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