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 * Copyright (c) 2009, Sun Microsystems, Inc.
5 * 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 are met:
9 * - Redistributions of source code must retain the above copyright notice,
10 * this list of conditions and the following disclaimer.
11 * - Redistributions in binary form must reproduce the above copyright notice,
12 * this list of conditions and the following disclaimer in the documentation
13 * and/or other materials provided with the distribution.
14 * - Neither the name of Sun Microsystems, Inc. nor the names of its
15 * contributors may be used to endorse or promote products derived
16 * from this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
22 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
28 * POSSIBILITY OF SUCH DAMAGE.
29 */
30
31 /*
32 * Copyright (c) 1986-1991 by Sun Microsystems Inc.
33 */
34
35 #if defined(LIBC_SCCS) && !defined(lint)
36 #ident "@(#)svc_generic.c 1.19 94/04/24 SMI"
37 static char sccsid[] = "@(#)svc_generic.c 1.21 89/02/28 Copyr 1988 Sun Micro";
38 #endif
39 #include <sys/cdefs.h>
40 __FBSDID("$FreeBSD: releng/11.2/sys/rpc/svc_generic.c 331722 2018-03-29 02:50:57Z eadler $");
41
42 /*
43 * svc_generic.c, Server side for RPC.
44 *
45 */
46
47 #include "opt_inet6.h"
48
49 #include <sys/param.h>
50 #include <sys/lock.h>
51 #include <sys/kernel.h>
52 #include <sys/malloc.h>
53 #include <sys/mutex.h>
54 #include <sys/protosw.h>
55 #include <sys/queue.h>
56 #include <sys/socket.h>
57 #include <sys/socketvar.h>
58 #include <sys/systm.h>
59 #include <sys/sx.h>
60 #include <sys/ucred.h>
61
62 #include <net/vnet.h>
63
64 #include <rpc/rpc.h>
65 #include <rpc/rpcb_clnt.h>
66 #include <rpc/nettype.h>
67
68 #include <rpc/rpc_com.h>
69
70 extern int __svc_vc_setflag(SVCXPRT *, int);
71
72 /*
73 * The highest level interface for server creation.
74 * It tries for all the nettokens in that particular class of token
75 * and returns the number of handles it can create and/or find.
76 *
77 * It creates a link list of all the handles it could create.
78 * If svc_create() is called multiple times, it uses the handle
79 * created earlier instead of creating a new handle every time.
80 */
81 int
82 svc_create(
83 SVCPOOL *pool,
84 void (*dispatch)(struct svc_req *, SVCXPRT *),
85 rpcprog_t prognum, /* Program number */
86 rpcvers_t versnum, /* Version number */
87 const char *nettype) /* Networktype token */
88 {
89 int g, num = 0;
90 SVCGROUP *grp;
91 SVCXPRT *xprt;
92 struct netconfig *nconf;
93 void *handle;
94
95 if ((handle = __rpc_setconf(nettype)) == NULL) {
96 printf("svc_create: unknown protocol");
97 return (0);
98 }
99 while ((nconf = __rpc_getconf(handle)) != NULL) {
100 for (g = 0; g < SVC_MAXGROUPS; g++) {
101 grp = &pool->sp_groups[g];
102 mtx_lock(&grp->sg_lock);
103 TAILQ_FOREACH(xprt, &grp->sg_xlist, xp_link) {
104 if (strcmp(xprt->xp_netid, nconf->nc_netid))
105 continue;
106 /* Found an old one, use it */
107 mtx_unlock(&grp->sg_lock);
108 (void) rpcb_unset(prognum, versnum, nconf);
109 if (svc_reg(xprt, prognum, versnum,
110 dispatch, nconf) == FALSE) {
111 printf(
112 "svc_create: could not register prog %u vers %u on %s\n",
113 (unsigned)prognum, (unsigned)versnum,
114 nconf->nc_netid);
115 mtx_lock(&grp->sg_lock);
116 } else {
117 num++;
118 mtx_lock(&grp->sg_lock);
119 break;
120 }
121 }
122 mtx_unlock(&grp->sg_lock);
123 }
124 if (xprt == NULL) {
125 /* It was not found. Now create a new one */
126 xprt = svc_tp_create(pool, dispatch, prognum, versnum,
127 NULL, nconf);
128 if (xprt) {
129 num++;
130 SVC_RELEASE(xprt);
131 }
132 }
133 }
134 __rpc_endconf(handle);
135 /*
136 * In case of num == 0; the error messages are generated by the
137 * underlying layers; and hence not needed here.
138 */
139 return (num);
140 }
141
142 /*
143 * The high level interface to svc_tli_create().
144 * It tries to create a server for "nconf" and registers the service
145 * with the rpcbind. It calls svc_tli_create();
146 */
147 SVCXPRT *
148 svc_tp_create(
149 SVCPOOL *pool,
150 void (*dispatch)(struct svc_req *, SVCXPRT *),
151 rpcprog_t prognum, /* Program number */
152 rpcvers_t versnum, /* Version number */
153 const char *uaddr, /* Address (or null for default) */
154 const struct netconfig *nconf) /* Netconfig structure for the network */
155 {
156 struct netconfig nconfcopy;
157 struct netbuf *taddr;
158 struct t_bind bind;
159 SVCXPRT *xprt;
160
161 if (nconf == NULL) {
162 printf(
163 "svc_tp_create: invalid netconfig structure for prog %u vers %u\n",
164 (unsigned)prognum, (unsigned)versnum);
165 return (NULL);
166 }
167 if (uaddr) {
168 taddr = uaddr2taddr(nconf, uaddr);
169 bind.addr = *taddr;
170 free(taddr, M_RPC);
171 bind.qlen = -1;
172 xprt = svc_tli_create(pool, NULL, nconf, &bind, 0, 0);
173 free(bind.addr.buf, M_RPC);
174 } else {
175 xprt = svc_tli_create(pool, NULL, nconf, NULL, 0, 0);
176 }
177 if (xprt == NULL) {
178 return (NULL);
179 }
180 /*LINTED const castaway*/
181 nconfcopy = *nconf;
182 (void) rpcb_unset(prognum, versnum, &nconfcopy);
183 if (svc_reg(xprt, prognum, versnum, dispatch, nconf) == FALSE) {
184 printf(
185 "svc_tp_create: Could not register prog %u vers %u on %s\n",
186 (unsigned)prognum, (unsigned)versnum,
187 nconf->nc_netid);
188 xprt_unregister(xprt);
189 SVC_RELEASE(xprt);
190 return (NULL);
191 }
192 return (xprt);
193 }
194
195 /*
196 * If so is NULL, then it opens a socket for the given transport
197 * provider (nconf cannot be NULL then). If the t_state is T_UNBND and
198 * bindaddr is NON-NULL, it performs a t_bind using the bindaddr. For
199 * NULL bindadr and Connection oriented transports, the value of qlen
200 * is set to 8.
201 *
202 * If sendsz or recvsz are zero, their default values are chosen.
203 */
204 SVCXPRT *
205 svc_tli_create(
206 SVCPOOL *pool,
207 struct socket *so, /* Connection end point */
208 const struct netconfig *nconf, /* Netconfig struct for nettoken */
209 const struct t_bind *bindaddr, /* Local bind address */
210 size_t sendsz, /* Max sendsize */
211 size_t recvsz) /* Max recvsize */
212 {
213 SVCXPRT *xprt = NULL; /* service handle */
214 bool_t madeso = FALSE; /* whether so opened here */
215 struct __rpc_sockinfo si;
216 struct sockaddr_storage ss;
217
218 if (!so) {
219 if (nconf == NULL) {
220 printf("svc_tli_create: invalid netconfig\n");
221 return (NULL);
222 }
223 so = __rpc_nconf2socket(nconf);
224 if (!so) {
225 printf(
226 "svc_tli_create: could not open connection for %s\n",
227 nconf->nc_netid);
228 return (NULL);
229 }
230 __rpc_nconf2sockinfo(nconf, &si);
231 madeso = TRUE;
232 } else {
233 /*
234 * It is an open socket. Get the transport info.
235 */
236 if (!__rpc_socket2sockinfo(so, &si)) {
237 printf(
238 "svc_tli_create: could not get transport information\n");
239 return (NULL);
240 }
241 }
242
243 /*
244 * If the socket is unbound, try to bind it.
245 */
246 if (madeso || !__rpc_sockisbound(so)) {
247 if (bindaddr == NULL) {
248 if (bindresvport(so, NULL)) {
249 memset(&ss, 0, sizeof ss);
250 ss.ss_family = si.si_af;
251 ss.ss_len = si.si_alen;
252 if (sobind(so, (struct sockaddr *)&ss,
253 curthread)) {
254 printf(
255 "svc_tli_create: could not bind to anonymous port\n");
256 goto freedata;
257 }
258 }
259 solisten(so, -1, curthread);
260 } else {
261 if (bindresvport(so,
262 (struct sockaddr *)bindaddr->addr.buf)) {
263 printf(
264 "svc_tli_create: could not bind to requested address\n");
265 goto freedata;
266 }
267 solisten(so, (int)bindaddr->qlen, curthread);
268 }
269
270 }
271 /*
272 * call transport specific function.
273 */
274 switch (si.si_socktype) {
275 case SOCK_STREAM:
276 #if 0
277 slen = sizeof ss;
278 if (_getpeername(fd, (struct sockaddr *)(void *)&ss, &slen)
279 == 0) {
280 /* accepted socket */
281 xprt = svc_fd_create(fd, sendsz, recvsz);
282 } else
283 #endif
284 xprt = svc_vc_create(pool, so, sendsz, recvsz);
285 if (!nconf || !xprt)
286 break;
287 #if 0
288 /* XXX fvdl */
289 if (strcmp(nconf->nc_protofmly, "inet") == 0 ||
290 strcmp(nconf->nc_protofmly, "inet6") == 0)
291 (void) __svc_vc_setflag(xprt, TRUE);
292 #endif
293 break;
294 case SOCK_DGRAM:
295 xprt = svc_dg_create(pool, so, sendsz, recvsz);
296 break;
297 default:
298 printf("svc_tli_create: bad service type");
299 goto freedata;
300 }
301
302 if (xprt == NULL)
303 /*
304 * The error messages here are spitted out by the lower layers:
305 * svc_vc_create(), svc_fd_create() and svc_dg_create().
306 */
307 goto freedata;
308
309 /* Fill in type of service */
310 xprt->xp_type = __rpc_socktype2seman(si.si_socktype);
311
312 if (nconf) {
313 xprt->xp_netid = strdup(nconf->nc_netid, M_RPC);
314 }
315 return (xprt);
316
317 freedata:
318 if (madeso)
319 (void)soclose(so);
320 if (xprt) {
321 if (!madeso) /* so that svc_destroy doesnt close fd */
322 xprt->xp_socket = NULL;
323 xprt_unregister(xprt);
324 }
325 return (NULL);
326 }
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