1/* $NetBSD: raw_usrreq.c,v 1.55 2016/01/20 21:43:59 riastradh Exp $ */
2
3/*
4 * Copyright (c) 1980, 1986, 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 *
31 * @(#)raw_usrreq.c 8.1 (Berkeley) 6/10/93
32 */
33
34/*
35 * Raw protocol interface.
36 */
37
38#include <sys/cdefs.h>
39__KERNEL_RCSID(0, "$NetBSD: raw_usrreq.c,v 1.55 2016/01/20 21:43:59 riastradh Exp $");
40
41#include <sys/param.h>
42#include <sys/mbuf.h>
43#include <sys/domain.h>
44#include <sys/protosw.h>
45#include <sys/socket.h>
46#include <sys/socketvar.h>
47#include <sys/errno.h>
48#include <sys/systm.h>
49#include <sys/proc.h>
50#include <sys/kauth.h>
51
52#include <net/if.h>
53#include <net/route.h>
54#include <net/netisr.h>
55#include <net/raw_cb.h>
56
57void
58raw_init(void)
59{
60 LIST_INIT(&rawcb);
61}
62
63static inline int
64equal(const struct sockaddr *a1, const struct sockaddr *a2)
65{
66 return memcmp(a1, a2, a1->sa_len) == 0;
67}
68
69/*
70 * raw_input: find the socket associated with the packet and move it over.
71 * If nothing exists for this packet, drop it.
72 */
73void
74raw_input(struct mbuf *m0, ...)
75{
76 struct rawcb *rp;
77 struct mbuf *m = m0;
78 struct socket *last;
79 va_list ap;
80 struct sockproto *proto;
81 struct sockaddr *src, *dst;
82
83 KASSERT(mutex_owned(softnet_lock));
84
85 va_start(ap, m0);
86 proto = va_arg(ap, struct sockproto *);
87 src = va_arg(ap, struct sockaddr *);
88 dst = va_arg(ap, struct sockaddr *);
89 va_end(ap);
90
91 last = NULL;
92 LIST_FOREACH(rp, &rawcb, rcb_list) {
93 if (rp->rcb_proto.sp_family != proto->sp_family)
94 continue;
95 if (rp->rcb_proto.sp_protocol &&
96 rp->rcb_proto.sp_protocol != proto->sp_protocol)
97 continue;
98 /*
99 * We assume the lower level routines have
100 * placed the address in a canonical format
101 * suitable for a structure comparison.
102 *
103 * Note that if the lengths are not the same
104 * the comparison will fail at the first byte.
105 */
106 if (rp->rcb_laddr && !equal(rp->rcb_laddr, dst))
107 continue;
108 if (rp->rcb_faddr && !equal(rp->rcb_faddr, src))
109 continue;
110 if (last != NULL) {
111 struct mbuf *n;
112 if ((n = m_copy(m, 0, M_COPYALL)) == NULL)
113 ;
114 else if (sbappendaddr(&last->so_rcv, src, n, NULL) == 0)
115 /* should notify about lost packet */
116 m_freem(n);
117 else {
118 sorwakeup(last);
119 }
120 }
121 last = rp->rcb_socket;
122 }
123 if (last == NULL || sbappendaddr(&last->so_rcv, src, m, NULL) == 0)
124 m_freem(m);
125 else {
126 sorwakeup(last);
127 }
128}
129
130void *
131raw_ctlinput(int cmd, const struct sockaddr *arg, void *d)
132{
133
134 if ((unsigned)cmd >= PRC_NCMDS)
135 return NULL;
136 return NULL;
137 /* INCOMPLETE */
138}
139
140void
141raw_setsockaddr(struct rawcb *rp, struct sockaddr *nam)
142{
143
144 memcpy(nam, rp->rcb_laddr, rp->rcb_laddr->sa_len);
145}
146
147void
148raw_setpeeraddr(struct rawcb *rp, struct sockaddr *nam)
149{
150
151 memcpy(nam, rp->rcb_faddr, rp->rcb_faddr->sa_len);
152}
153
154int
155raw_send(struct socket *so, struct mbuf *m, struct sockaddr *nam,
156 struct mbuf *control, struct lwp *l,
157 int (*output)(struct mbuf *, struct socket *))
158{
159 struct rawcb *rp = sotorawcb(so);
160 int error = 0;
161
162 KASSERT(rp != NULL);
163
164 /*
165 * Ship a packet out. The appropriate raw output
166 * routine handles any massaging necessary.
167 */
168 if (control && control->m_len) {
169 m_freem(control);
170 m_freem(m);
171 return EINVAL;
172 }
173 if (nam) {
174 if ((so->so_state & SS_ISCONNECTED) != 0) {
175 error = EISCONN;
176 goto die;
177 }
178 error = (*so->so_proto->pr_usrreqs->pr_connect)(so, nam, l);
179 if (error) {
180 die:
181 m_freem(m);
182 return error;
183 }
184 } else {
185 if ((so->so_state & SS_ISCONNECTED) == 0) {
186 error = ENOTCONN;
187 goto die;
188 }
189 }
190 error = (*output)(m, so);
191 if (nam)
192 raw_disconnect(rp);
193
194 return error;
195}
196
197int
198raw_usrreq(struct socket *so, int req, struct mbuf *m, struct mbuf *nam,
199 struct mbuf *control, struct lwp *l)
200{
201
202 KASSERT(req != PRU_ATTACH);
203 KASSERT(req != PRU_DETACH);
204 KASSERT(req != PRU_ACCEPT);
205 KASSERT(req != PRU_BIND);
206 KASSERT(req != PRU_LISTEN);
207 KASSERT(req != PRU_CONNECT);
208 KASSERT(req != PRU_CONNECT2);
209 KASSERT(req != PRU_DISCONNECT);
210 KASSERT(req != PRU_SHUTDOWN);
211 KASSERT(req != PRU_ABORT);
212 KASSERT(req != PRU_CONTROL);
213 KASSERT(req != PRU_SENSE);
214 KASSERT(req != PRU_PEERADDR);
215 KASSERT(req != PRU_SOCKADDR);
216 KASSERT(req != PRU_RCVD);
217 KASSERT(req != PRU_RCVOOB);
218 KASSERT(req != PRU_SEND);
219 KASSERT(req != PRU_SENDOOB);
220 KASSERT(req != PRU_PURGEIF);
221
222 if (sotorawcb(so) == NULL)
223 return EINVAL;
224
225 panic("raw_usrreq");
226
227 return 0;
228}
229