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: stable/10/lib/libc/rpc/svc_generic.c 309487 2016-12-03 17:27:28Z ngie $");
41
42 /*
43 * svc_generic.c, Server side for RPC.
44 *
45 */
46
47 #include "namespace.h"
48 #include "reentrant.h"
49 #include <sys/types.h>
50 #include <sys/socket.h>
51 #include <netinet/in.h>
52 #include <rpc/rpc.h>
53 #include <rpc/nettype.h>
54 #include <stdio.h>
55 #include <errno.h>
56 #include <stdlib.h>
57 #include <string.h>
58 #include <unistd.h>
59 #include <err.h>
60 #include "un-namespace.h"
61
62 #include "rpc_com.h"
63 #include "mt_misc.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 * prognum - Program number
77 * versnum - Version number
78 * nettype - Networktype token
79 */
80 int
svc_create(void (* dispatch)(struct svc_req *,SVCXPRT *),rpcprog_t prognum,rpcvers_t versnum,const char * nettype)81 svc_create(void (*dispatch)(struct svc_req *, SVCXPRT *),
82 rpcprog_t prognum, rpcvers_t versnum, const char *nettype)
83 {
84 struct xlist {
85 SVCXPRT *xprt; /* Server handle */
86 struct xlist *next; /* Next item */
87 } *l;
88 static struct xlist *xprtlist; /* A link list of all the handles */
89 int num = 0;
90 SVCXPRT *xprt;
91 struct netconfig *nconf;
92 void *handle;
93
94 /* VARIABLES PROTECTED BY xprtlist_lock: xprtlist */
95
96 if ((handle = __rpc_setconf(nettype)) == NULL) {
97 warnx("svc_create: unknown protocol");
98 return (0);
99 }
100 while ((nconf = __rpc_getconf(handle)) != NULL) {
101 mutex_lock(&xprtlist_lock);
102 for (l = xprtlist; l; l = l->next) {
103 if (strcmp(l->xprt->xp_netid, nconf->nc_netid) == 0) {
104 /* Found an old one, use it */
105 (void) rpcb_unset(prognum, versnum, nconf);
106 if (svc_reg(l->xprt, prognum, versnum,
107 dispatch, nconf) == FALSE)
108 warnx(
109 "svc_create: could not register prog %u vers %u on %s",
110 (unsigned)prognum, (unsigned)versnum,
111 nconf->nc_netid);
112 else
113 num++;
114 break;
115 }
116 }
117 if (l == NULL) {
118 /* It was not found. Now create a new one */
119 xprt = svc_tp_create(dispatch, prognum, versnum, nconf);
120 if (xprt) {
121 l = (struct xlist *)malloc(sizeof (*l));
122 if (l == NULL) {
123 warnx("svc_create: no memory");
124 mutex_unlock(&xprtlist_lock);
125 num = 0;
126 goto done;
127 }
128 l->xprt = xprt;
129 l->next = xprtlist;
130 xprtlist = l;
131 num++;
132 }
133 }
134 mutex_unlock(&xprtlist_lock);
135 }
136 done:
137 __rpc_endconf(handle);
138 /*
139 * In case of num == 0; the error messages are generated by the
140 * underlying layers; and hence not needed here.
141 */
142 return (num);
143 }
144
145 /*
146 * The high level interface to svc_tli_create().
147 * It tries to create a server for "nconf" and registers the service
148 * with the rpcbind. It calls svc_tli_create();
149 *
150 * prognum - Program number
151 * versnum - Version number
152 * ncofn - Netconfig structure for the network
153 */
154 SVCXPRT *
svc_tp_create(void (* dispatch)(struct svc_req *,SVCXPRT *),rpcprog_t prognum,rpcvers_t versnum,const struct netconfig * nconf)155 svc_tp_create(void (*dispatch)(struct svc_req *, SVCXPRT *),
156 rpcprog_t prognum, rpcvers_t versnum, const struct netconfig *nconf)
157 {
158 SVCXPRT *xprt;
159
160 if (nconf == NULL) {
161 warnx(
162 "svc_tp_create: invalid netconfig structure for prog %u vers %u",
163 (unsigned)prognum, (unsigned)versnum);
164 return (NULL);
165 }
166 xprt = svc_tli_create(RPC_ANYFD, nconf, NULL, 0, 0);
167 if (xprt == NULL) {
168 return (NULL);
169 }
170 /*LINTED const castaway*/
171 (void) rpcb_unset(prognum, versnum, (struct netconfig *) nconf);
172 if (svc_reg(xprt, prognum, versnum, dispatch, nconf) == FALSE) {
173 warnx(
174 "svc_tp_create: Could not register prog %u vers %u on %s",
175 (unsigned)prognum, (unsigned)versnum,
176 nconf->nc_netid);
177 SVC_DESTROY(xprt);
178 return (NULL);
179 }
180 return (xprt);
181 }
182
183 /*
184 * If fd is RPC_ANYFD, then it opens a fd for the given transport
185 * provider (nconf cannot be NULL then). If the t_state is T_UNBND and
186 * bindaddr is NON-NULL, it performs a t_bind using the bindaddr. For
187 * NULL bindadr and Connection oriented transports, the value of qlen
188 * is set to 8.
189 *
190 * If sendsz or recvsz are zero, their default values are chosen.
191 *
192 * fd - Connection end point
193 * nconf - Netconfig struct for nettoken
194 * bindaddr - Local bind address
195 * sendsz - Max sendsize
196 * recvxz - Max recvsize
197 */
198 SVCXPRT *
svc_tli_create(int fd,const struct netconfig * nconf,const struct t_bind * bindaddr,u_int sendsz,u_int recvsz)199 svc_tli_create(int fd, const struct netconfig *nconf,
200 const struct t_bind *bindaddr, u_int sendsz, u_int recvsz)
201 {
202 SVCXPRT *xprt = NULL; /* service handle */
203 bool_t madefd = FALSE; /* whether fd opened here */
204 struct __rpc_sockinfo si;
205 struct sockaddr_storage ss;
206 socklen_t slen;
207
208 if (fd == RPC_ANYFD) {
209 if (nconf == NULL) {
210 warnx("svc_tli_create: invalid netconfig");
211 return (NULL);
212 }
213 fd = __rpc_nconf2fd(nconf);
214 if (fd == -1) {
215 warnx(
216 "svc_tli_create: could not open connection for %s",
217 nconf->nc_netid);
218 return (NULL);
219 }
220 __rpc_nconf2sockinfo(nconf, &si);
221 madefd = TRUE;
222 } else {
223 /*
224 * It is an open descriptor. Get the transport info.
225 */
226 if (!__rpc_fd2sockinfo(fd, &si)) {
227 warnx(
228 "svc_tli_create: could not get transport information");
229 return (NULL);
230 }
231 }
232
233 /*
234 * If the fd is unbound, try to bind it.
235 */
236 if (madefd || !__rpc_sockisbound(fd)) {
237 if (bindaddr == NULL) {
238 if (bindresvport(fd, NULL) < 0) {
239 memset(&ss, 0, sizeof ss);
240 ss.ss_family = si.si_af;
241 ss.ss_len = si.si_alen;
242 if (_bind(fd, (struct sockaddr *)(void *)&ss,
243 (socklen_t)si.si_alen) < 0) {
244 warnx(
245 "svc_tli_create: could not bind to anonymous port");
246 goto freedata;
247 }
248 }
249 _listen(fd, SOMAXCONN);
250 } else {
251 if (_bind(fd,
252 (struct sockaddr *)bindaddr->addr.buf,
253 (socklen_t)si.si_alen) < 0) {
254 warnx(
255 "svc_tli_create: could not bind to requested address");
256 goto freedata;
257 }
258 _listen(fd, (int)bindaddr->qlen);
259 }
260
261 }
262 /*
263 * call transport specific function.
264 */
265 switch (si.si_socktype) {
266 case SOCK_STREAM:
267 slen = sizeof ss;
268 if (_getpeername(fd, (struct sockaddr *)(void *)&ss, &slen)
269 == 0) {
270 /* accepted socket */
271 xprt = svc_fd_create(fd, sendsz, recvsz);
272 } else
273 xprt = svc_vc_create(fd, sendsz, recvsz);
274 if (!nconf || !xprt)
275 break;
276 #if 0
277 /* XXX fvdl */
278 if (strcmp(nconf->nc_protofmly, "inet") == 0 ||
279 strcmp(nconf->nc_protofmly, "inet6") == 0)
280 (void) __svc_vc_setflag(xprt, TRUE);
281 #endif
282 break;
283 case SOCK_DGRAM:
284 xprt = svc_dg_create(fd, sendsz, recvsz);
285 break;
286 default:
287 warnx("svc_tli_create: bad service type");
288 goto freedata;
289 }
290
291 if (xprt == NULL)
292 /*
293 * The error messages here are spitted out by the lower layers:
294 * svc_vc_create(), svc_fd_create() and svc_dg_create().
295 */
296 goto freedata;
297
298 /* Fill in type of service */
299 xprt->xp_type = __rpc_socktype2seman(si.si_socktype);
300
301 if (nconf) {
302 xprt->xp_netid = strdup(nconf->nc_netid);
303 xprt->xp_tp = strdup(nconf->nc_device);
304 }
305 return (xprt);
306
307 freedata:
308 if (madefd)
309 (void)_close(fd);
310 if (xprt) {
311 if (!madefd) /* so that svc_destroy doesnt close fd */
312 xprt->xp_fd = RPC_ANYFD;
313 SVC_DESTROY(xprt);
314 }
315 return (NULL);
316 }
317