FreeBSD/Linux Kernel Cross Reference
sys/net/raw_usrreq.c
1 /*-
2 * Copyright (c) 1980, 1986, 1993
3 * The Regents of the University of California.
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 4. Neither the name of the University nor the names of its contributors
15 * may be used to endorse or promote products derived from this software
16 * without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * SUCH DAMAGE.
29 *
30 * @(#)raw_usrreq.c 8.1 (Berkeley) 6/10/93
31 * $FreeBSD: releng/10.3/sys/net/raw_usrreq.c 225837 2011-09-28 13:48:36Z bz $
32 */
33
34 #include <sys/param.h>
35 #include <sys/kernel.h>
36 #include <sys/lock.h>
37 #include <sys/malloc.h>
38 #include <sys/mbuf.h>
39 #include <sys/mutex.h>
40 #include <sys/priv.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/if.h>
49 #include <net/raw_cb.h>
50 #include <net/vnet.h>
51
52 MTX_SYSINIT(rawcb_mtx, &rawcb_mtx, "rawcb", MTX_DEF);
53
54 /*
55 * Initialize raw connection block q.
56 */
57 void
58 raw_init(void)
59 {
60
61 LIST_INIT(&V_rawcb_list);
62 }
63
64 /*
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.
67 */
68 /*
69 * Raw protocol interface.
70 */
71 void
72 raw_input(struct mbuf *m0, struct sockproto *proto, struct sockaddr *src)
73 {
74
75 return (raw_input_ext(m0, proto, src, NULL));
76 }
77
78 void
79 raw_input_ext(struct mbuf *m0, struct sockproto *proto, struct sockaddr *src,
80 raw_input_cb_fn cb)
81 {
82 struct rawcb *rp;
83 struct mbuf *m = m0;
84 struct socket *last;
85
86 last = 0;
87 mtx_lock(&rawcb_mtx);
88 LIST_FOREACH(rp, &V_rawcb_list, list) {
89 if (rp->rcb_proto.sp_family != proto->sp_family)
90 continue;
91 if (rp->rcb_proto.sp_protocol &&
92 rp->rcb_proto.sp_protocol != proto->sp_protocol)
93 continue;
94 if (cb != NULL && (*cb)(m, proto, src, rp) != 0)
95 continue;
96 if (last) {
97 struct mbuf *n;
98 n = m_copy(m, 0, (int)M_COPYALL);
99 if (n) {
100 if (sbappendaddr(&last->so_rcv, src,
101 n, (struct mbuf *)0) == 0)
102 /* should notify about lost packet */
103 m_freem(n);
104 else
105 sorwakeup(last);
106 }
107 }
108 last = rp->rcb_socket;
109 }
110 if (last) {
111 if (sbappendaddr(&last->so_rcv, src,
112 m, (struct mbuf *)0) == 0)
113 m_freem(m);
114 else
115 sorwakeup(last);
116 } else
117 m_freem(m);
118 mtx_unlock(&rawcb_mtx);
119 }
120
121 /*ARGSUSED*/
122 void
123 raw_ctlinput(int cmd, struct sockaddr *arg, void *dummy)
124 {
125
126 if (cmd < 0 || cmd >= PRC_NCMDS)
127 return;
128 /* INCOMPLETE */
129 }
130
131 static void
132 raw_uabort(struct socket *so)
133 {
134
135 KASSERT(sotorawcb(so) != NULL, ("raw_uabort: rp == NULL"));
136
137 soisdisconnected(so);
138 }
139
140 static void
141 raw_uclose(struct socket *so)
142 {
143
144 KASSERT(sotorawcb(so) != NULL, ("raw_uabort: rp == NULL"));
145
146 soisdisconnected(so);
147 }
148
149 /* pru_accept is EOPNOTSUPP */
150
151 static int
152 raw_uattach(struct socket *so, int proto, struct thread *td)
153 {
154 int error;
155
156 /*
157 * Implementors of raw sockets will already have allocated the PCB,
158 * so it must be non-NULL here.
159 */
160 KASSERT(sotorawcb(so) != NULL, ("raw_uattach: so_pcb == NULL"));
161
162 if (td != NULL) {
163 error = priv_check(td, PRIV_NET_RAW);
164 if (error)
165 return (error);
166 }
167 return (raw_attach(so, proto));
168 }
169
170 static int
171 raw_ubind(struct socket *so, struct sockaddr *nam, struct thread *td)
172 {
173
174 return (EINVAL);
175 }
176
177 static int
178 raw_uconnect(struct socket *so, struct sockaddr *nam, struct thread *td)
179 {
180
181 return (EINVAL);
182 }
183
184 /* pru_connect2 is EOPNOTSUPP */
185 /* pru_control is EOPNOTSUPP */
186
187 static void
188 raw_udetach(struct socket *so)
189 {
190 struct rawcb *rp = sotorawcb(so);
191
192 KASSERT(rp != NULL, ("raw_udetach: rp == NULL"));
193
194 raw_detach(rp);
195 }
196
197 static int
198 raw_udisconnect(struct socket *so)
199 {
200
201 KASSERT(sotorawcb(so) != NULL, ("raw_udisconnect: rp == NULL"));
202
203 return (ENOTCONN);
204 }
205
206 /* pru_listen is EOPNOTSUPP */
207
208 static int
209 raw_upeeraddr(struct socket *so, struct sockaddr **nam)
210 {
211
212 KASSERT(sotorawcb(so) != NULL, ("raw_upeeraddr: rp == NULL"));
213
214 return (ENOTCONN);
215 }
216
217 /* pru_rcvd is EOPNOTSUPP */
218 /* pru_rcvoob is EOPNOTSUPP */
219
220 static int
221 raw_usend(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam,
222 struct mbuf *control, struct thread *td)
223 {
224
225 KASSERT(sotorawcb(so) != NULL, ("raw_usend: rp == NULL"));
226
227 if ((flags & PRUS_OOB) || (control && control->m_len)) {
228 /* XXXRW: Should control also be freed here? */
229 if (m != NULL)
230 m_freem(m);
231 return (EOPNOTSUPP);
232 }
233
234 /*
235 * For historical (bad?) reasons, we effectively ignore the address
236 * argument to sendto(2). Perhaps we should return an error instead?
237 */
238 return ((*so->so_proto->pr_output)(m, so));
239 }
240
241 /* pru_sense is null */
242
243 static int
244 raw_ushutdown(struct socket *so)
245 {
246
247 KASSERT(sotorawcb(so) != NULL, ("raw_ushutdown: rp == NULL"));
248
249 socantsendmore(so);
250 return (0);
251 }
252
253 static int
254 raw_usockaddr(struct socket *so, struct sockaddr **nam)
255 {
256
257 KASSERT(sotorawcb(so) != NULL, ("raw_usockaddr: rp == NULL"));
258
259 return (EINVAL);
260 }
261
262 struct pr_usrreqs raw_usrreqs = {
263 .pru_abort = raw_uabort,
264 .pru_attach = raw_uattach,
265 .pru_bind = raw_ubind,
266 .pru_connect = raw_uconnect,
267 .pru_detach = raw_udetach,
268 .pru_disconnect = raw_udisconnect,
269 .pru_peeraddr = raw_upeeraddr,
270 .pru_send = raw_usend,
271 .pru_shutdown = raw_ushutdown,
272 .pru_sockaddr = raw_usockaddr,
273 .pru_close = raw_uclose,
274 };
Cache object: 10518c1d7417e4c7ee44421ed3a8e8a4
|