1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
|
/* $OpenBSD: raw_usrreq.c,v 1.24 2016/09/05 16:07:01 claudio Exp $ */
/* $NetBSD: raw_usrreq.c,v 1.11 1996/02/13 22:00:43 christos Exp $ */
/*
* Copyright (c) 1980, 1986, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)raw_usrreq.c 8.1 (Berkeley) 6/10/93
*/
#include <sys/param.h>
#include <sys/mbuf.h>
#include <sys/domain.h>
#include <sys/protosw.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/errno.h>
#include <sys/systm.h>
#include <net/netisr.h>
#include <net/raw_cb.h>
#include <sys/stdarg.h>
/*
* Initialize raw connection block q.
*/
void
raw_init(void)
{
LIST_INIT(&rawcb);
}
/*
* Raw protocol input routine. Find the socket
* associated with the packet(s) and move them over. If
* nothing exists for this packet, drop it.
*/
/*
* Raw protocol interface.
*/
void
raw_input(struct mbuf *m0, ...)
{
struct rawcb *rp;
struct mbuf *m = m0;
int sockets = 0;
struct socket *last;
va_list ap;
struct sockproto *proto;
struct sockaddr *src, *dst;
va_start(ap, m0);
proto = va_arg(ap, struct sockproto *);
src = va_arg(ap, struct sockaddr *);
dst = va_arg(ap, struct sockaddr *);
va_end(ap);
last = 0;
LIST_FOREACH(rp, &rawcb, rcb_list) {
if (rp->rcb_socket->so_state & SS_CANTRCVMORE)
continue;
if (rp->rcb_proto.sp_family != proto->sp_family)
continue;
if (rp->rcb_proto.sp_protocol &&
rp->rcb_proto.sp_protocol != proto->sp_protocol)
continue;
/*
* We assume the lower level routines have
* placed the address in a canonical format
* suitable for a structure comparison.
*
* Note that if the lengths are not the same
* the comparison will fail at the first byte.
*/
#define equal(a1, a2) \
(bcmp((caddr_t)(a1), (caddr_t)(a2), a1->sa_len) == 0)
if (rp->rcb_laddr && !equal(rp->rcb_laddr, dst))
continue;
if (rp->rcb_faddr && !equal(rp->rcb_faddr, src))
continue;
if (last) {
struct mbuf *n;
if ((n = m_copym(m, 0, M_COPYALL, M_NOWAIT)) != NULL) {
if (sbappendaddr(&last->so_rcv, src,
n, (struct mbuf *)NULL) == 0)
/* should notify about lost packet */
m_freem(n);
else {
sorwakeup(last);
sockets++;
}
}
}
last = rp->rcb_socket;
}
if (last) {
if (sbappendaddr(&last->so_rcv, src,
m, (struct mbuf *)NULL) == 0)
m_freem(m);
else {
sorwakeup(last);
sockets++;
}
} else
m_freem(m);
}
int
raw_usrreq(struct socket *so, int req, struct mbuf *m, struct mbuf *nam,
struct mbuf *control, struct proc *p)
{
struct rawcb *rp = sotorawcb(so);
int error = 0;
int len, s;
if (req == PRU_CONTROL)
return (EOPNOTSUPP);
if (control && control->m_len) {
error = EOPNOTSUPP;
goto release;
}
if (rp == 0) {
error = EINVAL;
goto release;
}
s = splsoftnet();
switch (req) {
/*
* Allocate a raw control block and fill in the
* necessary info to allow packets to be routed to
* the appropriate raw interface routine.
*/
case PRU_ATTACH:
if ((so->so_state & SS_PRIV) == 0) {
error = EACCES;
break;
}
error = raw_attach(so, (int)(long)nam);
break;
/*
* Destroy state just before socket deallocation.
* Flush data or not depending on the options.
*/
case PRU_DETACH:
if (rp == 0) {
error = ENOTCONN;
break;
}
raw_detach(rp);
break;
case PRU_CONNECT:
case PRU_BIND:
case PRU_CONNECT2:
error = EOPNOTSUPP;
break;
case PRU_DISCONNECT:
if (rp->rcb_faddr == 0) {
error = ENOTCONN;
break;
}
raw_disconnect(rp);
soisdisconnected(so);
break;
/*
* Mark the connection as being incapable of further input.
*/
case PRU_SHUTDOWN:
socantsendmore(so);
break;
/*
* Ship a packet out. The appropriate raw output
* routine handles any massaging necessary.
*/
case PRU_SEND:
if (nam) {
if (rp->rcb_faddr) {
error = EISCONN;
break;
}
rp->rcb_faddr = mtod(nam, struct sockaddr *);
} else if (rp->rcb_faddr == 0) {
error = ENOTCONN;
break;
}
error = (*so->so_proto->pr_output)(m, so);
m = NULL;
if (nam)
rp->rcb_faddr = 0;
break;
case PRU_ABORT:
raw_disconnect(rp);
sofree(so);
soisdisconnected(so);
break;
case PRU_SENSE:
/*
* stat: don't bother with a blocksize.
*/
splx(s);
return (0);
/*
* Not supported.
*/
case PRU_RCVOOB:
case PRU_RCVD:
splx(s);
return (EOPNOTSUPP);
case PRU_LISTEN:
case PRU_ACCEPT:
case PRU_SENDOOB:
error = EOPNOTSUPP;
break;
case PRU_SOCKADDR:
if (rp->rcb_laddr == 0) {
error = EINVAL;
break;
}
len = rp->rcb_laddr->sa_len;
bcopy((caddr_t)rp->rcb_laddr, mtod(nam, caddr_t), (unsigned)len);
nam->m_len = len;
break;
case PRU_PEERADDR:
if (rp->rcb_faddr == 0) {
error = ENOTCONN;
break;
}
len = rp->rcb_faddr->sa_len;
bcopy((caddr_t)rp->rcb_faddr, mtod(nam, caddr_t), (unsigned)len);
nam->m_len = len;
break;
default:
panic("raw_usrreq");
}
splx(s);
release:
m_freem(m);
return (error);
}
|
