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: src/sys/rpc/svc_generic.c,v 1.3 2008/11/03 10:38:00 dfr Exp $");
42
43 /*
44 * svc_generic.c, Server side for RPC.
45 *
46 */
47
48 #include "opt_inet6.h"
49
50 #include <sys/param.h>
51 #include <sys/lock.h>
52 #include <sys/kernel.h>
53 #include <sys/malloc.h>
54 #include <sys/mutex.h>
55 #include <sys/protosw.h>
56 #include <sys/queue.h>
57 #include <sys/socket.h>
58 #include <sys/socketvar.h>
59 #include <sys/systm.h>
60 #include <sys/sx.h>
61 #include <sys/ucred.h>
62
63 #include <rpc/rpc.h>
64 #include <rpc/rpcb_clnt.h>
65 #include <rpc/nettype.h>
66
67 #include <rpc/rpc_com.h>
68
69 extern int __svc_vc_setflag(SVCXPRT *, int);
70
71 /*
72 * The highest level interface for server creation.
73 * It tries for all the nettokens in that particular class of token
74 * and returns the number of handles it can create and/or find.
75 *
76 * It creates a link list of all the handles it could create.
77 * If svc_create() is called multiple times, it uses the handle
78 * created earlier instead of creating a new handle every time.
79 */
80 int
81 svc_create(
82 SVCPOOL *pool,
83 void (*dispatch)(struct svc_req *, SVCXPRT *),
84 rpcprog_t prognum, /* Program number */
85 rpcvers_t versnum, /* Version number */
86 const char *nettype) /* Networktype token */
87 {
88 int num = 0;
89 SVCXPRT *xprt;
90 struct netconfig *nconf;
91 void *handle;
92
93 if ((handle = __rpc_setconf(nettype)) == NULL) {
94 printf("svc_create: unknown protocol");
95 return (0);
96 }
97 while ((nconf = __rpc_getconf(handle)) != NULL) {
98 mtx_lock(&pool->sp_lock);
99 TAILQ_FOREACH(xprt, &pool->sp_xlist, xp_link) {
100 if (strcmp(xprt->xp_netid, nconf->nc_netid) == 0) {
101 /* Found an old one, use it */
102 mtx_unlock(&pool->sp_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(&pool->sp_lock);
111 } else {
112 num++;
113 mtx_lock(&pool->sp_lock);
114 break;
115 }
116 }
117 }
118 mtx_unlock(&pool->sp_lock);
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 }
126 }
127 __rpc_endconf(handle);
128 /*
129 * In case of num == 0; the error messages are generated by the
130 * underlying layers; and hence not needed here.
131 */
132 return (num);
133 }
134
135 /*
136 * The high level interface to svc_tli_create().
137 * It tries to create a server for "nconf" and registers the service
138 * with the rpcbind. It calls svc_tli_create();
139 */
140 SVCXPRT *
141 svc_tp_create(
142 SVCPOOL *pool,
143 void (*dispatch)(struct svc_req *, SVCXPRT *),
144 rpcprog_t prognum, /* Program number */
145 rpcvers_t versnum, /* Version number */
146 const char *uaddr, /* Address (or null for default) */
147 const struct netconfig *nconf) /* Netconfig structure for the network */
148 {
149 struct netconfig nconfcopy;
150 struct netbuf *taddr;
151 struct t_bind bind;
152 SVCXPRT *xprt;
153
154 if (nconf == NULL) {
155 printf(
156 "svc_tp_create: invalid netconfig structure for prog %u vers %u\n",
157 (unsigned)prognum, (unsigned)versnum);
158 return (NULL);
159 }
160 if (uaddr) {
161 taddr = uaddr2taddr(nconf, uaddr);
162 bind.addr = *taddr;
163 free(taddr, M_RPC);
164 bind.qlen = SOMAXCONN;
165 xprt = svc_tli_create(pool, NULL, nconf, &bind, 0, 0);
166 free(bind.addr.buf, M_RPC);
167 } else {
168 xprt = svc_tli_create(pool, NULL, nconf, NULL, 0, 0);
169 }
170 if (xprt == NULL) {
171 return (NULL);
172 }
173 /*LINTED const castaway*/
174 nconfcopy = *nconf;
175 (void) rpcb_unset(prognum, versnum, &nconfcopy);
176 if (svc_reg(xprt, prognum, versnum, dispatch, nconf) == FALSE) {
177 printf(
178 "svc_tp_create: Could not register prog %u vers %u on %s\n",
179 (unsigned)prognum, (unsigned)versnum,
180 nconf->nc_netid);
181 xprt_unregister(xprt);
182 return (NULL);
183 }
184 return (xprt);
185 }
186
187 /*
188 * If so is NULL, then it opens a socket for the given transport
189 * provider (nconf cannot be NULL then). If the t_state is T_UNBND and
190 * bindaddr is NON-NULL, it performs a t_bind using the bindaddr. For
191 * NULL bindadr and Connection oriented transports, the value of qlen
192 * is set to 8.
193 *
194 * If sendsz or recvsz are zero, their default values are chosen.
195 */
196 SVCXPRT *
197 svc_tli_create(
198 SVCPOOL *pool,
199 struct socket *so, /* Connection end point */
200 const struct netconfig *nconf, /* Netconfig struct for nettoken */
201 const struct t_bind *bindaddr, /* Local bind address */
202 size_t sendsz, /* Max sendsize */
203 size_t recvsz) /* Max recvsize */
204 {
205 SVCXPRT *xprt = NULL; /* service handle */
206 bool_t madeso = FALSE; /* whether so opened here */
207 struct __rpc_sockinfo si;
208 struct sockaddr_storage ss;
209
210 if (!so) {
211 if (nconf == NULL) {
212 printf("svc_tli_create: invalid netconfig\n");
213 return (NULL);
214 }
215 so = __rpc_nconf2socket(nconf);
216 if (!so) {
217 printf(
218 "svc_tli_create: could not open connection for %s\n",
219 nconf->nc_netid);
220 return (NULL);
221 }
222 __rpc_nconf2sockinfo(nconf, &si);
223 madeso = TRUE;
224 } else {
225 /*
226 * It is an open socket. Get the transport info.
227 */
228 if (!__rpc_socket2sockinfo(so, &si)) {
229 printf(
230 "svc_tli_create: could not get transport information\n");
231 return (NULL);
232 }
233 }
234
235 /*
236 * If the socket is unbound, try to bind it.
237 */
238 if (madeso || !__rpc_sockisbound(so)) {
239 if (bindaddr == NULL) {
240 if (bindresvport(so, NULL)) {
241 memset(&ss, 0, sizeof ss);
242 ss.ss_family = si.si_af;
243 ss.ss_len = si.si_alen;
244 if (sobind(so, (struct sockaddr *)&ss,
245 curthread)) {
246 printf(
247 "svc_tli_create: could not bind to anonymous port\n");
248 goto freedata;
249 }
250 }
251 solisten(so, SOMAXCONN, curthread);
252 } else {
253 if (bindresvport(so,
254 (struct sockaddr *)bindaddr->addr.buf)) {
255 printf(
256 "svc_tli_create: could not bind to requested address\n");
257 goto freedata;
258 }
259 solisten(so, (int)bindaddr->qlen, curthread);
260 }
261
262 }
263 /*
264 * call transport specific function.
265 */
266 switch (si.si_socktype) {
267 case SOCK_STREAM:
268 #if 0
269 slen = sizeof ss;
270 if (_getpeername(fd, (struct sockaddr *)(void *)&ss, &slen)
271 == 0) {
272 /* accepted socket */
273 xprt = svc_fd_create(fd, sendsz, recvsz);
274 } else
275 #endif
276 xprt = svc_vc_create(pool, so, sendsz, recvsz);
277 if (!nconf || !xprt)
278 break;
279 #if 0
280 /* XXX fvdl */
281 if (strcmp(nconf->nc_protofmly, "inet") == 0 ||
282 strcmp(nconf->nc_protofmly, "inet6") == 0)
283 (void) __svc_vc_setflag(xprt, TRUE);
284 #endif
285 break;
286 case SOCK_DGRAM:
287 xprt = svc_dg_create(pool, so, sendsz, recvsz);
288 break;
289 default:
290 printf("svc_tli_create: bad service type");
291 goto freedata;
292 }
293
294 if (xprt == NULL)
295 /*
296 * The error messages here are spitted out by the lower layers:
297 * svc_vc_create(), svc_fd_create() and svc_dg_create().
298 */
299 goto freedata;
300
301 /* Fill in type of service */
302 xprt->xp_type = __rpc_socktype2seman(si.si_socktype);
303
304 if (nconf) {
305 xprt->xp_netid = strdup(nconf->nc_netid, M_RPC);
306 }
307 return (xprt);
308
309 freedata:
310 if (madeso)
311 (void)soclose(so);
312 if (xprt) {
313 if (!madeso) /* so that svc_destroy doesnt close fd */
314 xprt->xp_socket = NULL;
315 xprt_unregister(xprt);
316 }
317 return (NULL);
318 }
319
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