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 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
5 * unrestricted use provided that this legend is included on all tape
6 * media and as a part of the software program in whole or part. Users
7 * may copy or modify Sun RPC without charge, but are not authorized
8 * to license or distribute it to anyone else except as part of a product or
9 * program developed by the user.
10 *
11 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
12 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
13 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
14 *
15 * Sun RPC is provided with no support and without any obligation on the
16 * part of Sun Microsystems, Inc. to assist in its use, correction,
17 * modification or enhancement.
18 *
19 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
20 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
21 * OR ANY PART THEREOF.
22 *
23 * In no event will Sun Microsystems, Inc. be liable for any lost revenue
24 * or profits or other special, indirect and consequential damages, even if
25 * Sun has been advised of the possibility of such damages.
26 *
27 * Sun Microsystems, Inc.
28 * 2550 Garcia Avenue
29 * Mountain View, California 94043
30 */
31
32 /*
33 * Copyright (c) 1986-1991 by Sun Microsystems Inc.
34 */
35
36 #if defined(LIBC_SCCS) && !defined(lint)
37 #ident "@(#)svc_generic.c 1.19 94/04/24 SMI"
38 static char sccsid[] = "@(#)svc_generic.c 1.21 89/02/28 Copyr 1988 Sun Micro";
39 #endif
40 #include <sys/cdefs.h>
41 __FBSDID("$FreeBSD: stable/6/lib/libc/rpc/svc_generic.c 136581 2004-10-16 06:11:35Z obrien $");
42
43 /*
44 * svc_generic.c, Server side for RPC.
45 *
46 */
47
48 #include "namespace.h"
49 #include "reentrant.h"
50 #include <sys/types.h>
51 #include <sys/socket.h>
52 #include <netinet/in.h>
53 #include <rpc/rpc.h>
54 #include <rpc/nettype.h>
55 #include <stdio.h>
56 #include <errno.h>
57 #include <stdlib.h>
58 #include <string.h>
59 #include <unistd.h>
60 #include <err.h>
61 #include "un-namespace.h"
62
63 #include "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
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 extern mutex_t xprtlist_lock;
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 return (0);
126 }
127 l->xprt = xprt;
128 l->next = xprtlist;
129 xprtlist = l;
130 num++;
131 }
132 }
133 mutex_unlock(&xprtlist_lock);
134 }
135 __rpc_endconf(handle);
136 /*
137 * In case of num == 0; the error messages are generated by the
138 * underlying layers; and hence not needed here.
139 */
140 return (num);
141 }
142
143 /*
144 * The high level interface to svc_tli_create().
145 * It tries to create a server for "nconf" and registers the service
146 * with the rpcbind. It calls svc_tli_create();
147 */
148 SVCXPRT *
149 svc_tp_create(dispatch, prognum, versnum, nconf)
150 void (*dispatch)(struct svc_req *, SVCXPRT *);
151 rpcprog_t prognum; /* Program number */
152 rpcvers_t versnum; /* Version number */
153 const struct netconfig *nconf; /* Netconfig structure for the network */
154 {
155 SVCXPRT *xprt;
156
157 if (nconf == NULL) {
158 warnx(
159 "svc_tp_create: invalid netconfig structure for prog %u vers %u",
160 (unsigned)prognum, (unsigned)versnum);
161 return (NULL);
162 }
163 xprt = svc_tli_create(RPC_ANYFD, nconf, NULL, 0, 0);
164 if (xprt == NULL) {
165 return (NULL);
166 }
167 /*LINTED const castaway*/
168 (void) rpcb_unset(prognum, versnum, (struct netconfig *) nconf);
169 if (svc_reg(xprt, prognum, versnum, dispatch, nconf) == FALSE) {
170 warnx(
171 "svc_tp_create: Could not register prog %u vers %u on %s",
172 (unsigned)prognum, (unsigned)versnum,
173 nconf->nc_netid);
174 SVC_DESTROY(xprt);
175 return (NULL);
176 }
177 return (xprt);
178 }
179
180 /*
181 * If fd is RPC_ANYFD, then it opens a fd for the given transport
182 * provider (nconf cannot be NULL then). If the t_state is T_UNBND and
183 * bindaddr is NON-NULL, it performs a t_bind using the bindaddr. For
184 * NULL bindadr and Connection oriented transports, the value of qlen
185 * is set to 8.
186 *
187 * If sendsz or recvsz are zero, their default values are chosen.
188 */
189 SVCXPRT *
190 svc_tli_create(fd, nconf, bindaddr, sendsz, recvsz)
191 int fd; /* Connection end point */
192 const struct netconfig *nconf; /* Netconfig struct for nettoken */
193 const struct t_bind *bindaddr; /* Local bind address */
194 u_int sendsz; /* Max sendsize */
195 u_int recvsz; /* Max recvsize */
196 {
197 SVCXPRT *xprt = NULL; /* service handle */
198 bool_t madefd = FALSE; /* whether fd opened here */
199 struct __rpc_sockinfo si;
200 struct sockaddr_storage ss;
201 socklen_t slen;
202
203 if (fd == RPC_ANYFD) {
204 if (nconf == NULL) {
205 warnx("svc_tli_create: invalid netconfig");
206 return (NULL);
207 }
208 fd = __rpc_nconf2fd(nconf);
209 if (fd == -1) {
210 warnx(
211 "svc_tli_create: could not open connection for %s",
212 nconf->nc_netid);
213 return (NULL);
214 }
215 __rpc_nconf2sockinfo(nconf, &si);
216 madefd = TRUE;
217 } else {
218 /*
219 * It is an open descriptor. Get the transport info.
220 */
221 if (!__rpc_fd2sockinfo(fd, &si)) {
222 warnx(
223 "svc_tli_create: could not get transport information");
224 return (NULL);
225 }
226 }
227
228 /*
229 * If the fd is unbound, try to bind it.
230 */
231 if (madefd || !__rpc_sockisbound(fd)) {
232 if (bindaddr == NULL) {
233 if (bindresvport(fd, NULL) < 0) {
234 memset(&ss, 0, sizeof ss);
235 ss.ss_family = si.si_af;
236 ss.ss_len = si.si_alen;
237 if (_bind(fd, (struct sockaddr *)(void *)&ss,
238 (socklen_t)si.si_alen) < 0) {
239 warnx(
240 "svc_tli_create: could not bind to anonymous port");
241 goto freedata;
242 }
243 }
244 _listen(fd, SOMAXCONN);
245 } else {
246 if (_bind(fd,
247 (struct sockaddr *)bindaddr->addr.buf,
248 (socklen_t)si.si_alen) < 0) {
249 warnx(
250 "svc_tli_create: could not bind to requested address");
251 goto freedata;
252 }
253 _listen(fd, (int)bindaddr->qlen);
254 }
255
256 }
257 /*
258 * call transport specific function.
259 */
260 switch (si.si_socktype) {
261 case SOCK_STREAM:
262 slen = sizeof ss;
263 if (_getpeername(fd, (struct sockaddr *)(void *)&ss, &slen)
264 == 0) {
265 /* accepted socket */
266 xprt = svc_fd_create(fd, sendsz, recvsz);
267 } else
268 xprt = svc_vc_create(fd, sendsz, recvsz);
269 if (!nconf || !xprt)
270 break;
271 #if 0
272 /* XXX fvdl */
273 if (strcmp(nconf->nc_protofmly, "inet") == 0 ||
274 strcmp(nconf->nc_protofmly, "inet6") == 0)
275 (void) __svc_vc_setflag(xprt, TRUE);
276 #endif
277 break;
278 case SOCK_DGRAM:
279 xprt = svc_dg_create(fd, sendsz, recvsz);
280 break;
281 default:
282 warnx("svc_tli_create: bad service type");
283 goto freedata;
284 }
285
286 if (xprt == NULL)
287 /*
288 * The error messages here are spitted out by the lower layers:
289 * svc_vc_create(), svc_fd_create() and svc_dg_create().
290 */
291 goto freedata;
292
293 /* Fill in type of service */
294 xprt->xp_type = __rpc_socktype2seman(si.si_socktype);
295
296 if (nconf) {
297 xprt->xp_netid = strdup(nconf->nc_netid);
298 xprt->xp_tp = strdup(nconf->nc_device);
299 }
300 return (xprt);
301
302 freedata:
303 if (madefd)
304 (void)_close(fd);
305 if (xprt) {
306 if (!madefd) /* so that svc_destroy doesnt close fd */
307 xprt->xp_fd = RPC_ANYFD;
308 SVC_DESTROY(xprt);
309 }
310 return (NULL);
311 }
Cache object: b33949e8bb3af415698ea9cec71af251
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