1 /*
2 * Copyright (c) 1982, 1986, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 * @(#)uipc_domain.c 8.2 (Berkeley) 10/18/93
30 * $FreeBSD: src/sys/kern/uipc_domain.c,v 1.22.2.1 2001/07/03 11:01:37 ume Exp $
31 */
32
33 #include <sys/param.h>
34 #include <sys/socket.h>
35 #include <sys/protosw.h>
36 #include <sys/domain.h>
37 #include <sys/mbuf.h>
38 #include <sys/kernel.h>
39 #include <sys/socketvar.h>
40 #include <sys/socketops.h>
41 #include <sys/systm.h>
42 #include <vm/vm_zone.h>
43
44 #include <sys/thread2.h>
45
46 /*
47 * System initialization
48 *
49 * Note: domain initialization wants to take place on a per domain basis
50 * as a result of traversing a linker set. Most likely, each domain
51 * want to call a registration function rather than being handled here
52 * in domaininit(). Probably this will look like:
53 *
54 * SYSINIT(unique, SI_SUB_PROTO_DOMAIN, SI_ORDER_ANY, domain_add, xxx);
55 *
56 * Where 'xxx' is replaced by the address of a parameter struct to be
57 * passed to the doamin_add() function.
58 */
59
60 static void domaininit (void *);
61 SYSINIT(domain, SI_SUB_PROTO_DOMAIN, SI_ORDER_FIRST, domaininit, NULL);
62
63 struct domainlist domains;
64
65 /*
66 * Add a new protocol domain to the list of supported domains
67 * Note: you cant unload it again because a socket may be using it.
68 * XXX can't fail at this time.
69 */
70 #define PR_NOTSUPP(pr, label) \
71 if (pr->pr_ ## label == NULL) \
72 pr->pr_ ## label = pr_generic_notsupp;
73
74 #define PRU_NOTSUPP(pu, label) \
75 if (pu->pru_ ## label == NULL) \
76 pu->pru_ ## label = pr_generic_notsupp;
77
78 static void
net_init_domain(struct domain * dp)79 net_init_domain(struct domain *dp)
80 {
81 struct protosw *pr;
82 struct pr_usrreqs *pu;
83
84 crit_enter();
85
86 if (dp->dom_init)
87 (*dp->dom_init)();
88
89 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) {
90 pu = pr->pr_usrreqs;
91 if (pu == NULL) {
92 panic("domaininit: %ssw[%ld] has no usrreqs!",
93 dp->dom_name, (long)(pr - dp->dom_protosw));
94 }
95 PR_NOTSUPP(pr, ctloutput);
96 PRU_NOTSUPP(pu, accept);
97 PRU_NOTSUPP(pu, bind);
98 PRU_NOTSUPP(pu, connect);
99 PRU_NOTSUPP(pu, connect2);
100 PRU_NOTSUPP(pu, control);
101 PRU_NOTSUPP(pu, disconnect);
102 PRU_NOTSUPP(pu, listen);
103 PRU_NOTSUPP(pu, peeraddr);
104 PRU_NOTSUPP(pu, rcvd);
105 PRU_NOTSUPP(pu, rcvoob);
106 PRU_NOTSUPP(pu, shutdown);
107 PRU_NOTSUPP(pu, sockaddr);
108
109 if (pu->pru_sense == NULL)
110 pu->pru_sense = pru_sense_null;
111 if (pu->pru_sosend == NULL)
112 pu->pru_sosend = pru_sosend_notsupp;
113 if (pu->pru_soreceive == NULL)
114 pu->pru_soreceive = pru_soreceive_notsupp;
115
116 if (pr->pr_init)
117 (*pr->pr_init)();
118 }
119 /*
120 * update global information about maximums
121 */
122 max_hdr = max_linkhdr + max_protohdr;
123 max_datalen = MHLEN - max_hdr;
124 crit_exit();
125 }
126
127 /*
128 * Add a new protocol domain to the list of supported domains
129 * Note: you cant unload it again because a socket may be using it.
130 * XXX can't fail at this time.
131 */
132 void
net_add_domain(void * data)133 net_add_domain(void *data)
134 {
135 struct domain *dp = data;
136
137 crit_enter();
138 SLIST_INSERT_HEAD(&domains, dp, dom_next);
139 crit_exit();
140 net_init_domain(dp);
141 }
142
143 /* ARGSUSED*/
144 static void
domaininit(void * dummy)145 domaininit(void *dummy)
146 {
147 if (max_linkhdr < 20) /* XXX */
148 max_linkhdr = 20;
149 }
150
151
152 struct protosw *
pffindtype(int family,int type)153 pffindtype(int family, int type)
154 {
155 struct domain *dp;
156 struct protosw *pr;
157
158 SLIST_FOREACH(dp, &domains, dom_next)
159 if (dp->dom_family == family)
160 goto found;
161 return (NULL);
162
163 found:
164 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
165 if (pr->pr_type && pr->pr_type == type)
166 return (pr);
167 return (NULL);
168 }
169
170 struct protosw *
pffindproto(int family,int protocol,int type)171 pffindproto(int family, int protocol, int type)
172 {
173 struct domain *dp;
174 struct protosw *pr;
175 struct protosw *maybe = NULL;
176
177 if (family == 0)
178 return (NULL);
179 SLIST_FOREACH(dp, &domains, dom_next)
180 if (dp->dom_family == family)
181 goto found;
182 return (NULL);
183
184 found:
185 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) {
186 if ((pr->pr_protocol == protocol) && (pr->pr_type == type))
187 return (pr);
188
189 if (type == SOCK_RAW && pr->pr_type == SOCK_RAW &&
190 pr->pr_protocol == 0 && maybe == NULL)
191 maybe = pr;
192 }
193 return (maybe);
194 }
195
196 void
kpfctlinput(int cmd,struct sockaddr * sa)197 kpfctlinput(int cmd, struct sockaddr *sa)
198 {
199 struct domain *dp;
200 struct protosw *pr;
201
202 SLIST_FOREACH(dp, &domains, dom_next) {
203 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
204 so_pr_ctlinput(pr, cmd, sa, NULL);
205 }
206 }
207
208 void
kpfctlinput_direct(int cmd,struct sockaddr * sa)209 kpfctlinput_direct(int cmd, struct sockaddr *sa)
210 {
211 struct domain *dp;
212 struct protosw *pr;
213
214 SLIST_FOREACH(dp, &domains, dom_next) {
215 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
216 so_pr_ctlinput_direct(pr, cmd, sa, NULL);
217 }
218 }
219
220 void
kpfctlinput2(int cmd,struct sockaddr * sa,void * ctlparam)221 kpfctlinput2(int cmd, struct sockaddr *sa, void *ctlparam)
222 {
223 struct domain *dp;
224 struct protosw *pr;
225
226 if (!sa)
227 return;
228 SLIST_FOREACH(dp, &domains, dom_next) {
229 /*
230 * the check must be made by xx_ctlinput() anyways, to
231 * make sure we use data item pointed to by ctlparam in
232 * correct way. the following check is made just for safety.
233 */
234 if (dp->dom_family != sa->sa_family)
235 continue;
236
237 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
238 so_pr_ctlinput(pr, cmd, sa, ctlparam);
239 }
240 }
241