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
|
/*
* Copyright (c) 1982, 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. 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.
*
* @(#)uipc_domain.c 8.2 (Berkeley) 10/18/93
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/socket.h>
#include <sys/protosw.h>
#include <sys/domain.h>
#include <sys/mbuf.h>
#include <sys/kernel.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/socketvar.h>
#include <sys/systm.h>
#include <vm/uma.h>
/*
* System initialization
*
* Note: domain initialization takes place on a per domain basis
* as a result of traversing a SYSINIT linker set. Most likely,
* each domain would want to call DOMAIN_SET(9) itself, which
* would cause the domain to be added just after domaininit()
* is called during startup.
*
* See DOMAIN_SET(9) for details on its use.
*/
static void domaininit(void *);
SYSINIT(domain, SI_SUB_PROTO_DOMAIN, SI_ORDER_FIRST, domaininit, NULL)
static struct callout pffast_callout;
static struct callout pfslow_callout;
static void pffasttimo(void *);
static void pfslowtimo(void *);
struct domain *domains; /* registered protocol domains */
struct mtx dom_mtx; /* domain list lock */
MTX_SYSINIT(domain, &dom_mtx, "domain list", MTX_DEF);
/*
* Add a new protocol domain to the list of supported domains
* Note: you cant unload it again because a socket may be using it.
* XXX can't fail at this time.
*/
static void
net_init_domain(struct domain *dp)
{
struct protosw *pr;
if (dp->dom_init)
(*dp->dom_init)();
for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++){
if (pr->pr_usrreqs == 0)
panic("domaininit: %ssw[%d] has no usrreqs!",
dp->dom_name,
(int)(pr - dp->dom_protosw));
if (pr->pr_init)
(*pr->pr_init)();
}
/*
* update global information about maximums
*/
max_hdr = max_linkhdr + max_protohdr;
max_datalen = MHLEN - max_hdr;
}
/*
* Add a new protocol domain to the list of supported domains
* Note: you cant unload it again because a socket may be using it.
* XXX can't fail at this time.
*/
void
net_add_domain(void *data)
{
struct domain *dp;
dp = (struct domain *)data;
mtx_lock(&dom_mtx);
dp->dom_next = domains;
domains = dp;
mtx_unlock(&dom_mtx);
net_init_domain(dp);
}
/* ARGSUSED*/
static void
domaininit(void *dummy)
{
/*
* Before we do any setup, make sure to initialize the
* zone allocator we get struct sockets from.
*/
socket_zone = uma_zcreate("socket", sizeof(struct socket), NULL, NULL,
NULL, NULL, UMA_ALIGN_PTR, UMA_ZONE_NOFREE);
uma_zone_set_max(socket_zone, maxsockets);
if (max_linkhdr < 16) /* XXX */
max_linkhdr = 16;
callout_init(&pffast_callout, 0);
callout_init(&pfslow_callout, 0);
callout_reset(&pffast_callout, 1, pffasttimo, NULL);
callout_reset(&pfslow_callout, 1, pfslowtimo, NULL);
}
struct protosw *
pffindtype(family, type)
int family;
int type;
{
register struct domain *dp;
register struct protosw *pr;
for (dp = domains; dp; dp = dp->dom_next)
if (dp->dom_family == family)
goto found;
return (0);
found:
for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
if (pr->pr_type && pr->pr_type == type)
return (pr);
return (0);
}
struct protosw *
pffindproto(family, protocol, type)
int family;
int protocol;
int type;
{
register struct domain *dp;
register struct protosw *pr;
struct protosw *maybe = 0;
if (family == 0)
return (0);
for (dp = domains; dp; dp = dp->dom_next)
if (dp->dom_family == family)
goto found;
return (0);
found:
for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) {
if ((pr->pr_protocol == protocol) && (pr->pr_type == type))
return (pr);
if (type == SOCK_RAW && pr->pr_type == SOCK_RAW &&
pr->pr_protocol == 0 && maybe == (struct protosw *)0)
maybe = pr;
}
return (maybe);
}
void
pfctlinput(cmd, sa)
int cmd;
struct sockaddr *sa;
{
register struct domain *dp;
register struct protosw *pr;
for (dp = domains; dp; dp = dp->dom_next)
for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
if (pr->pr_ctlinput)
(*pr->pr_ctlinput)(cmd, sa, (void *)0);
}
void
pfctlinput2(cmd, sa, ctlparam)
int cmd;
struct sockaddr *sa;
void *ctlparam;
{
struct domain *dp;
struct protosw *pr;
if (!sa)
return;
for (dp = domains; dp; dp = dp->dom_next) {
/*
* the check must be made by xx_ctlinput() anyways, to
* make sure we use data item pointed to by ctlparam in
* correct way. the following check is made just for safety.
*/
if (dp->dom_family != sa->sa_family)
continue;
for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
if (pr->pr_ctlinput)
(*pr->pr_ctlinput)(cmd, sa, ctlparam);
}
}
static void
pfslowtimo(arg)
void *arg;
{
register struct domain *dp;
register struct protosw *pr;
for (dp = domains; dp; dp = dp->dom_next)
for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
if (pr->pr_slowtimo)
(*pr->pr_slowtimo)();
callout_reset(&pfslow_callout, hz/2, pfslowtimo, NULL);
}
static void
pffasttimo(arg)
void *arg;
{
register struct domain *dp;
register struct protosw *pr;
for (dp = domains; dp; dp = dp->dom_next)
for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
if (pr->pr_fasttimo)
(*pr->pr_fasttimo)();
callout_reset(&pffast_callout, hz/5, pffasttimo, NULL);
}
|
