FreeBSD/Linux Kernel Cross Reference
sys/rpc/svc_generic.c
1 /* $NetBSD: svc_generic.c,v 1.3 2000/07/06 03:10:35 christos Exp $ */
2
3 /*-
4 * SPDX-License-Identifier: BSD-3-Clause
5 *
6 * Copyright (c) 2009, Sun Microsystems, Inc.
7 * All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions are met:
11 * - Redistributions of source code must retain the above copyright notice,
12 * this list of conditions and the following disclaimer.
13 * - Redistributions in binary form must reproduce the above copyright notice,
14 * this list of conditions and the following disclaimer in the documentation
15 * and/or other materials provided with the distribution.
16 * - Neither the name of Sun Microsystems, Inc. nor the names of its
17 * contributors may be used to endorse or promote products derived
18 * from this software without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
21 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
24 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30 * POSSIBILITY OF SUCH DAMAGE.
31 */
32
33 /*
34 * Copyright (c) 1986-1991 by Sun Microsystems Inc.
35 */
36
37 #if defined(LIBC_SCCS) && !defined(lint)
38 #ident "@(#)svc_generic.c 1.19 94/04/24 SMI"
39 static char sccsid[] = "@(#)svc_generic.c 1.21 89/02/28 Copyr 1988 Sun Micro";
40 #endif
41 #include <sys/cdefs.h>
42 __FBSDID("$FreeBSD$");
43
44 /*
45 * svc_generic.c, Server side for RPC.
46 *
47 */
48
49 #include "opt_inet6.h"
50
51 #include <sys/param.h>
52 #include <sys/lock.h>
53 #include <sys/kernel.h>
54 #include <sys/malloc.h>
55 #include <sys/mutex.h>
56 #include <sys/protosw.h>
57 #include <sys/queue.h>
58 #include <sys/socket.h>
59 #include <sys/socketvar.h>
60 #include <sys/systm.h>
61 #include <sys/sx.h>
62 #include <sys/ucred.h>
63
64 #include <net/vnet.h>
65
66 #include <rpc/rpc.h>
67 #include <rpc/rpcb_clnt.h>
68 #include <rpc/nettype.h>
69
70 #include <rpc/rpc_com.h>
71
72 extern int __svc_vc_setflag(SVCXPRT *, int);
73
74 /*
75 * The highest level interface for server creation.
76 * It tries for all the nettokens in that particular class of token
77 * and returns the number of handles it can create and/or find.
78 *
79 * It creates a link list of all the handles it could create.
80 * If svc_create() is called multiple times, it uses the handle
81 * created earlier instead of creating a new handle every time.
82 */
83 int
84 svc_create(
85 SVCPOOL *pool,
86 void (*dispatch)(struct svc_req *, SVCXPRT *),
87 rpcprog_t prognum, /* Program number */
88 rpcvers_t versnum, /* Version number */
89 const char *nettype) /* Networktype token */
90 {
91 int g, num = 0;
92 SVCGROUP *grp;
93 SVCXPRT *xprt;
94 struct netconfig *nconf;
95 void *handle;
96
97 if ((handle = __rpc_setconf(nettype)) == NULL) {
98 printf("svc_create: unknown protocol");
99 return (0);
100 }
101 while ((nconf = __rpc_getconf(handle)) != NULL) {
102 for (g = 0; g < SVC_MAXGROUPS; g++) {
103 grp = &pool->sp_groups[g];
104 mtx_lock(&grp->sg_lock);
105 TAILQ_FOREACH(xprt, &grp->sg_xlist, xp_link) {
106 if (strcmp(xprt->xp_netid, nconf->nc_netid))
107 continue;
108 /* Found an old one, use it */
109 mtx_unlock(&grp->sg_lock);
110 (void) rpcb_unset(prognum, versnum, nconf);
111 if (svc_reg(xprt, prognum, versnum,
112 dispatch, nconf) == FALSE) {
113 printf(
114 "svc_create: could not register prog %u vers %u on %s\n",
115 (unsigned)prognum, (unsigned)versnum,
116 nconf->nc_netid);
117 mtx_lock(&grp->sg_lock);
118 } else {
119 num++;
120 mtx_lock(&grp->sg_lock);
121 break;
122 }
123 }
124 mtx_unlock(&grp->sg_lock);
125 }
126 if (xprt == NULL) {
127 /* It was not found. Now create a new one */
128 xprt = svc_tp_create(pool, dispatch, prognum, versnum,
129 NULL, nconf);
130 if (xprt) {
131 num++;
132 SVC_RELEASE(xprt);
133 }
134 }
135 }
136 __rpc_endconf(handle);
137 /*
138 * In case of num == 0; the error messages are generated by the
139 * underlying layers; and hence not needed here.
140 */
141 return (num);
142 }
143
144 /*
145 * The high level interface to svc_tli_create().
146 * It tries to create a server for "nconf" and registers the service
147 * with the rpcbind. It calls svc_tli_create();
148 */
149 SVCXPRT *
150 svc_tp_create(
151 SVCPOOL *pool,
152 void (*dispatch)(struct svc_req *, SVCXPRT *),
153 rpcprog_t prognum, /* Program number */
154 rpcvers_t versnum, /* Version number */
155 const char *uaddr, /* Address (or null for default) */
156 const struct netconfig *nconf) /* Netconfig structure for the network */
157 {
158 struct netconfig nconfcopy;
159 struct netbuf *taddr;
160 struct t_bind bind;
161 SVCXPRT *xprt;
162
163 if (nconf == NULL) {
164 printf(
165 "svc_tp_create: invalid netconfig structure for prog %u vers %u\n",
166 (unsigned)prognum, (unsigned)versnum);
167 return (NULL);
168 }
169 if (uaddr) {
170 taddr = uaddr2taddr(nconf, uaddr);
171 bind.addr = *taddr;
172 free(taddr, M_RPC);
173 bind.qlen = -1;
174 xprt = svc_tli_create(pool, NULL, nconf, &bind, 0, 0);
175 free(bind.addr.buf, M_RPC);
176 } else {
177 xprt = svc_tli_create(pool, NULL, nconf, NULL, 0, 0);
178 }
179 if (xprt == NULL) {
180 return (NULL);
181 }
182 /*LINTED const castaway*/
183 nconfcopy = *nconf;
184 (void) rpcb_unset(prognum, versnum, &nconfcopy);
185 if (svc_reg(xprt, prognum, versnum, dispatch, nconf) == FALSE) {
186 printf(
187 "svc_tp_create: Could not register prog %u vers %u on %s\n",
188 (unsigned)prognum, (unsigned)versnum,
189 nconf->nc_netid);
190 xprt_unregister(xprt);
191 SVC_RELEASE(xprt);
192 return (NULL);
193 }
194 return (xprt);
195 }
196
197 /*
198 * If so is NULL, then it opens a socket for the given transport
199 * provider (nconf cannot be NULL then). If the t_state is T_UNBND and
200 * bindaddr is NON-NULL, it performs a t_bind using the bindaddr. For
201 * NULL bindadr and Connection oriented transports, the value of qlen
202 * is set to 8.
203 *
204 * If sendsz or recvsz are zero, their default values are chosen.
205 */
206 SVCXPRT *
207 svc_tli_create(
208 SVCPOOL *pool,
209 struct socket *so, /* Connection end point */
210 const struct netconfig *nconf, /* Netconfig struct for nettoken */
211 const struct t_bind *bindaddr, /* Local bind address */
212 size_t sendsz, /* Max sendsize */
213 size_t recvsz) /* Max recvsize */
214 {
215 SVCXPRT *xprt = NULL; /* service handle */
216 bool_t madeso = FALSE; /* whether so opened here */
217 struct __rpc_sockinfo si;
218 struct sockaddr_storage ss;
219
220 if (!so) {
221 if (nconf == NULL) {
222 printf("svc_tli_create: invalid netconfig\n");
223 return (NULL);
224 }
225 so = __rpc_nconf2socket(nconf);
226 if (!so) {
227 printf(
228 "svc_tli_create: could not open connection for %s\n",
229 nconf->nc_netid);
230 return (NULL);
231 }
232 __rpc_nconf2sockinfo(nconf, &si);
233 madeso = TRUE;
234 } else {
235 /*
236 * It is an open socket. Get the transport info.
237 */
238 if (!__rpc_socket2sockinfo(so, &si)) {
239 printf(
240 "svc_tli_create: could not get transport information\n");
241 return (NULL);
242 }
243 }
244
245 /*
246 * If the socket is unbound, try to bind it.
247 */
248 if (madeso || !__rpc_sockisbound(so)) {
249 if (bindaddr == NULL) {
250 if (bindresvport(so, NULL)) {
251 memset(&ss, 0, sizeof ss);
252 ss.ss_family = si.si_af;
253 ss.ss_len = si.si_alen;
254 if (sobind(so, (struct sockaddr *)&ss,
255 curthread)) {
256 printf(
257 "svc_tli_create: could not bind to anonymous port\n");
258 goto freedata;
259 }
260 }
261 solisten(so, -1, curthread);
262 } else {
263 if (bindresvport(so,
264 (struct sockaddr *)bindaddr->addr.buf)) {
265 printf(
266 "svc_tli_create: could not bind to requested address\n");
267 goto freedata;
268 }
269 solisten(so, (int)bindaddr->qlen, curthread);
270 }
271
272 }
273 /*
274 * call transport specific function.
275 */
276 switch (si.si_socktype) {
277 case SOCK_STREAM:
278 #if 0
279 slen = sizeof ss;
280 if (_getpeername(fd, (struct sockaddr *)(void *)&ss, &slen)
281 == 0) {
282 /* accepted socket */
283 xprt = svc_fd_create(fd, sendsz, recvsz);
284 } else
285 #endif
286 xprt = svc_vc_create(pool, so, sendsz, recvsz);
287 if (!nconf || !xprt)
288 break;
289 #if 0
290 /* XXX fvdl */
291 if (strcmp(nconf->nc_protofmly, "inet") == 0 ||
292 strcmp(nconf->nc_protofmly, "inet6") == 0)
293 (void) __svc_vc_setflag(xprt, TRUE);
294 #endif
295 break;
296 case SOCK_DGRAM:
297 xprt = svc_dg_create(pool, so, sendsz, recvsz);
298 break;
299 default:
300 printf("svc_tli_create: bad service type");
301 goto freedata;
302 }
303
304 if (xprt == NULL)
305 /*
306 * The error messages here are spitted out by the lower layers:
307 * svc_vc_create(), svc_fd_create() and svc_dg_create().
308 */
309 goto freedata;
310
311 /* Fill in type of service */
312 xprt->xp_type = __rpc_socktype2seman(si.si_socktype);
313
314 if (nconf) {
315 xprt->xp_netid = strdup(nconf->nc_netid, M_RPC);
316 }
317 return (xprt);
318
319 freedata:
320 if (madeso)
321 (void)soclose(so);
322 if (xprt) {
323 if (!madeso) /* so that svc_destroy doesnt close fd */
324 xprt->xp_socket = NULL;
325 xprt_unregister(xprt);
326 }
327 return (NULL);
328 }
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