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 /*
38 * svc_generic.c, Server side for RPC.
39 *
40 */
41
42 #include "opt_inet6.h"
43
44 #include <sys/param.h>
45 #include <sys/lock.h>
46 #include <sys/kernel.h>
47 #include <sys/malloc.h>
48 #include <sys/mutex.h>
49 #include <sys/protosw.h>
50 #include <sys/queue.h>
51 #include <sys/socket.h>
52 #include <sys/socketvar.h>
53 #include <sys/systm.h>
54 #include <sys/sx.h>
55 #include <sys/ucred.h>
56
57 #include <net/vnet.h>
58
59 #include <rpc/rpc.h>
60 #include <rpc/rpcb_clnt.h>
61 #include <rpc/nettype.h>
62
63 #include <rpc/rpc_com.h>
64
65 extern int __svc_vc_setflag(SVCXPRT *, int);
66
67 /*
68 * The highest level interface for server creation.
69 * It tries for all the nettokens in that particular class of token
70 * and returns the number of handles it can create and/or find.
71 *
72 * It creates a link list of all the handles it could create.
73 * If svc_create() is called multiple times, it uses the handle
74 * created earlier instead of creating a new handle every time.
75 */
76 int
svc_create(SVCPOOL * pool,void (* dispatch)(struct svc_req *,SVCXPRT *),rpcprog_t prognum,rpcvers_t versnum,const char * nettype)77 svc_create(
78 SVCPOOL *pool,
79 void (*dispatch)(struct svc_req *, SVCXPRT *),
80 rpcprog_t prognum, /* Program number */
81 rpcvers_t versnum, /* Version number */
82 const char *nettype) /* Networktype token */
83 {
84 int g, num = 0;
85 SVCGROUP *grp;
86 SVCXPRT *xprt;
87 struct netconfig *nconf;
88 void *handle;
89
90 if ((handle = __rpc_setconf(nettype)) == NULL) {
91 printf("svc_create: unknown protocol");
92 return (0);
93 }
94 while ((nconf = __rpc_getconf(handle)) != NULL) {
95 for (g = 0; g < SVC_MAXGROUPS; g++) {
96 grp = &pool->sp_groups[g];
97 mtx_lock(&grp->sg_lock);
98 TAILQ_FOREACH(xprt, &grp->sg_xlist, xp_link) {
99 if (strcmp(xprt->xp_netid, nconf->nc_netid))
100 continue;
101 /* Found an old one, use it */
102 mtx_unlock(&grp->sg_lock);
103 (void) rpcb_unset(prognum, versnum, nconf);
104 if (svc_reg(xprt, prognum, versnum,
105 dispatch, nconf) == FALSE) {
106 printf(
107 "svc_create: could not register prog %u vers %u on %s\n",
108 (unsigned)prognum, (unsigned)versnum,
109 nconf->nc_netid);
110 mtx_lock(&grp->sg_lock);
111 } else {
112 num++;
113 mtx_lock(&grp->sg_lock);
114 break;
115 }
116 }
117 mtx_unlock(&grp->sg_lock);
118 }
119 if (xprt == NULL) {
120 /* It was not found. Now create a new one */
121 xprt = svc_tp_create(pool, dispatch, prognum, versnum,
122 NULL, nconf);
123 if (xprt) {
124 num++;
125 SVC_RELEASE(xprt);
126 }
127 }
128 }
129 __rpc_endconf(handle);
130 /*
131 * In case of num == 0; the error messages are generated by the
132 * underlying layers; and hence not needed here.
133 */
134 return (num);
135 }
136
137 /*
138 * The high level interface to svc_tli_create().
139 * It tries to create a server for "nconf" and registers the service
140 * with the rpcbind. It calls svc_tli_create();
141 */
142 SVCXPRT *
svc_tp_create(SVCPOOL * pool,void (* dispatch)(struct svc_req *,SVCXPRT *),rpcprog_t prognum,rpcvers_t versnum,const char * uaddr,const struct netconfig * nconf)143 svc_tp_create(
144 SVCPOOL *pool,
145 void (*dispatch)(struct svc_req *, SVCXPRT *),
146 rpcprog_t prognum, /* Program number */
147 rpcvers_t versnum, /* Version number */
148 const char *uaddr, /* Address (or null for default) */
149 const struct netconfig *nconf) /* Netconfig structure for the network */
150 {
151 struct netconfig nconfcopy;
152 struct netbuf *taddr;
153 struct t_bind bind;
154 SVCXPRT *xprt;
155
156 if (nconf == NULL) {
157 printf(
158 "svc_tp_create: invalid netconfig structure for prog %u vers %u\n",
159 (unsigned)prognum, (unsigned)versnum);
160 return (NULL);
161 }
162 if (uaddr) {
163 taddr = uaddr2taddr(nconf, uaddr);
164 bind.addr = *taddr;
165 free(taddr, M_RPC);
166 bind.qlen = -1;
167 xprt = svc_tli_create(pool, NULL, nconf, &bind, 0, 0);
168 free(bind.addr.buf, M_RPC);
169 } else {
170 xprt = svc_tli_create(pool, NULL, nconf, NULL, 0, 0);
171 }
172 if (xprt == NULL) {
173 return (NULL);
174 }
175 /*LINTED const castaway*/
176 nconfcopy = *nconf;
177 (void) rpcb_unset(prognum, versnum, &nconfcopy);
178 if (svc_reg(xprt, prognum, versnum, dispatch, nconf) == FALSE) {
179 printf(
180 "svc_tp_create: Could not register prog %u vers %u on %s\n",
181 (unsigned)prognum, (unsigned)versnum,
182 nconf->nc_netid);
183 xprt_unregister(xprt);
184 SVC_RELEASE(xprt);
185 return (NULL);
186 }
187 return (xprt);
188 }
189
190 /*
191 * If so is NULL, then it opens a socket for the given transport
192 * provider (nconf cannot be NULL then). If the t_state is T_UNBND and
193 * bindaddr is NON-NULL, it performs a t_bind using the bindaddr. For
194 * NULL bindadr and Connection oriented transports, the value of qlen
195 * is set to 8.
196 *
197 * If sendsz or recvsz are zero, their default values are chosen.
198 */
199 SVCXPRT *
svc_tli_create(SVCPOOL * pool,struct socket * so,const struct netconfig * nconf,const struct t_bind * bindaddr,size_t sendsz,size_t recvsz)200 svc_tli_create(
201 SVCPOOL *pool,
202 struct socket *so, /* Connection end point */
203 const struct netconfig *nconf, /* Netconfig struct for nettoken */
204 const struct t_bind *bindaddr, /* Local bind address */
205 size_t sendsz, /* Max sendsize */
206 size_t recvsz) /* Max recvsize */
207 {
208 SVCXPRT *xprt = NULL; /* service handle */
209 bool_t madeso = FALSE; /* whether so opened here */
210 struct __rpc_sockinfo si;
211 struct sockaddr_storage ss;
212
213 if (!so) {
214 if (nconf == NULL) {
215 printf("svc_tli_create: invalid netconfig\n");
216 return (NULL);
217 }
218 so = __rpc_nconf2socket(nconf);
219 if (!so) {
220 printf(
221 "svc_tli_create: could not open connection for %s\n",
222 nconf->nc_netid);
223 return (NULL);
224 }
225 __rpc_nconf2sockinfo(nconf, &si);
226 madeso = TRUE;
227 } else {
228 /*
229 * It is an open socket. Get the transport info.
230 */
231 if (!__rpc_socket2sockinfo(so, &si)) {
232 printf(
233 "svc_tli_create: could not get transport information\n");
234 return (NULL);
235 }
236 }
237
238 /*
239 * If the socket is unbound, try to bind it.
240 */
241 if (madeso || !__rpc_sockisbound(so)) {
242 if (bindaddr == NULL) {
243 if (bindresvport(so, NULL)) {
244 memset(&ss, 0, sizeof ss);
245 ss.ss_family = si.si_af;
246 ss.ss_len = si.si_alen;
247 if (sobind(so, (struct sockaddr *)&ss,
248 curthread)) {
249 printf(
250 "svc_tli_create: could not bind to anonymous port\n");
251 goto freedata;
252 }
253 }
254 solisten(so, -1, curthread);
255 } else {
256 if (bindresvport(so,
257 (struct sockaddr *)bindaddr->addr.buf)) {
258 printf(
259 "svc_tli_create: could not bind to requested address\n");
260 goto freedata;
261 }
262 solisten(so, (int)bindaddr->qlen, curthread);
263 }
264
265 }
266 /*
267 * call transport specific function.
268 */
269 switch (si.si_socktype) {
270 case SOCK_STREAM:
271 #if 0
272 slen = sizeof ss;
273 if (_getpeername(fd, (struct sockaddr *)(void *)&ss, &slen)
274 == 0) {
275 /* accepted socket */
276 xprt = svc_fd_create(fd, sendsz, recvsz);
277 } else
278 #endif
279 xprt = svc_vc_create(pool, so, sendsz, recvsz);
280 if (!nconf || !xprt)
281 break;
282 #if 0
283 /* XXX fvdl */
284 if (strcmp(nconf->nc_protofmly, "inet") == 0 ||
285 strcmp(nconf->nc_protofmly, "inet6") == 0)
286 (void) __svc_vc_setflag(xprt, TRUE);
287 #endif
288 break;
289 case SOCK_DGRAM:
290 xprt = svc_dg_create(pool, so, sendsz, recvsz);
291 break;
292 default:
293 printf("svc_tli_create: bad service type");
294 goto freedata;
295 }
296
297 if (xprt == NULL)
298 /*
299 * The error messages here are spitted out by the lower layers:
300 * svc_vc_create(), svc_fd_create() and svc_dg_create().
301 */
302 goto freedata;
303
304 /* Fill in type of service */
305 xprt->xp_type = __rpc_socktype2seman(si.si_socktype);
306
307 if (nconf) {
308 xprt->xp_netid = strdup(nconf->nc_netid, M_RPC);
309 }
310 return (xprt);
311
312 freedata:
313 if (madeso)
314 (void)soclose(so);
315 if (xprt) {
316 if (!madeso) /* so that svc_destroy doesnt close fd */
317 xprt->xp_socket = NULL;
318 xprt_unregister(xprt);
319 }
320 return (NULL);
321 }
322