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