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:

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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: head/sys/net/raw_usrreq.c 180385 2008-07-09 15:48:16Z rwatson $
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>

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62/*
63 * Raw protocol input routine. Find the socket associated with the packet(s)
64 * and move them over. If nothing exists for this packet, drop it.
65 */
66/*
67 * Raw protocol interface.
68 */
69void
70raw_input(struct mbuf *m0, struct sockproto *proto, struct sockaddr *src)
71{
72 struct rawcb *rp;
73 struct mbuf *m = m0;
74 struct socket *last;
75
76 last = 0;
77 mtx_lock(&rawcb_mtx);
78 LIST_FOREACH(rp, &rawcb_list, list) {
79 if (rp->rcb_proto.sp_family != proto->sp_family)
80 continue;
81 if (rp->rcb_proto.sp_protocol &&
82 rp->rcb_proto.sp_protocol != proto->sp_protocol)
83 continue;
84 if (last) {
85 struct mbuf *n;
86 n = m_copy(m, 0, (int)M_COPYALL);
87 if (n) {
88 if (sbappendaddr(&last->so_rcv, src,
89 n, (struct mbuf *)0) == 0)
90 /* should notify about lost packet */
91 m_freem(n);

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114 if (cmd < 0 || cmd >= PRC_NCMDS)
115 return;
116 /* INCOMPLETE */
117}
118
119static void
120raw_uabort(struct socket *so)
121{
122
123 KASSERT(sotorawcb(so) != NULL, ("raw_uabort: rp == NULL"));
124
125 soisdisconnected(so);
126}
127
128static void
129raw_uclose(struct socket *so)
130{
131
132 KASSERT(sotorawcb(so) != NULL, ("raw_uabort: rp == NULL"));
133
134 soisdisconnected(so);
135}
136
137/* pru_accept is EOPNOTSUPP */
138
139static int
140raw_uattach(struct socket *so, int proto, struct thread *td)
141{
142 int error;
143
144 /*
145 * Implementors of raw sockets will already have allocated the PCB,
146 * so it must be non-NULL here.
147 */
148 KASSERT(sotorawcb(so) != NULL, ("raw_uattach: so_pcb == NULL"));
149
150 if (td != NULL) {
151 error = priv_check(td, PRIV_NET_RAW);
152 if (error)
153 return (error);
154 }
155 return (raw_attach(so, proto));
156}
157
158static int
159raw_ubind(struct socket *so, struct sockaddr *nam, struct thread *td)
160{
161
162 return (EINVAL);
163}

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173/* pru_control is EOPNOTSUPP */
174
175static void
176raw_udetach(struct socket *so)
177{
178 struct rawcb *rp = sotorawcb(so);
179
180 KASSERT(rp != NULL, ("raw_udetach: rp == NULL"));
181
182 raw_detach(rp);
183}
184
185static int
186raw_udisconnect(struct socket *so)
187{
188
189 KASSERT(sotorawcb(so) != NULL, ("raw_udisconnect: rp == NULL"));
190
191 return (ENOTCONN);
192}
193
194/* pru_listen is EOPNOTSUPP */
195
196static int
197raw_upeeraddr(struct socket *so, struct sockaddr **nam)
198{
199
200 KASSERT(sotorawcb(so) != NULL, ("raw_upeeraddr: rp == NULL"));
201
202 return (ENOTCONN);
203}
204
205/* pru_rcvd is EOPNOTSUPP */
206/* pru_rcvoob is EOPNOTSUPP */
207
208static int
209raw_usend(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam,
210 struct mbuf *control, struct thread *td)
211{
212
213 KASSERT(sotorawcb(so) != NULL, ("raw_usend: rp == NULL"));
214
215 if ((flags & PRUS_OOB) || (control && control->m_len)) {
216 /* XXXRW: Should control also be freed here? */
217 if (m != NULL)
218 m_freem(m);
219 return (EOPNOTSUPP);
220 }
221
222 /*
223 * For historical (bad?) reasons, we effectively ignore the address
224 * argument to sendto(2). Perhaps we should return an error instead?
225 */
226 return ((*so->so_proto->pr_output)(m, so));
227}
228
229/* pru_sense is null */
230
231static int
232raw_ushutdown(struct socket *so)
233{
234
235 KASSERT(sotorawcb(so) != NULL, ("raw_ushutdown: rp == NULL"));
236
237 socantsendmore(so);
238 return (0);
239}
240
241static int
242raw_usockaddr(struct socket *so, struct sockaddr **nam)
243{
244
245 KASSERT(sotorawcb(so) != NULL, ("raw_usockaddr: rp == NULL"));
246
247 return (EINVAL);
248}
249
250struct pr_usrreqs raw_usrreqs = {
251 .pru_abort = raw_uabort,
252 .pru_attach = raw_uattach,
253 .pru_bind = raw_ubind,
254 .pru_connect = raw_uconnect,
255 .pru_detach = raw_udetach,
256 .pru_disconnect = raw_udisconnect,
257 .pru_peeraddr = raw_upeeraddr,
258 .pru_send = raw_usend,
259 .pru_shutdown = raw_ushutdown,
260 .pru_sockaddr = raw_usockaddr,
261 .pru_close = raw_uclose,
262};