2 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
3 * unrestricted use provided that this legend is included on all tape
4 * media and as a part of the software program in whole or part. Users
5 * may copy or modify Sun RPC without charge, but are not authorized
6 * to license or distribute it to anyone else except as part of a product or
7 * program developed by the user.
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11 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
13 * Sun RPC is provided with no support and without any obligation on the
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15 * modification or enhancement.
17 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
18 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
19 * OR ANY PART THEREOF.
21 * In no event will Sun Microsystems, Inc. be liable for any lost revenue
22 * or profits or other special, indirect and consequential damages, even if
23 * Sun has been advised of the possibility of such damages.
25 * Sun Microsystems, Inc.
27 * Mountain View, California 94043
29 * @(#)svc_simple.c 1.18 87/08/11 Copyr 1984 Sun Micro
30 * @(#)svc_simple.c 2.2 88/08/01 4.0 RPCSRC
31 * $NetBSD: svc_simple.c,v 1.20 2000/07/06 03:10:35 christos Exp $
32 * $FreeBSD: src/lib/libc/rpc/svc_simple.c,v 1.16 2006/09/09 22:32:07 mbr Exp $
33 * $DragonFly: src/lib/libc/rpc/svc_simple.c,v 1.3 2005/11/13 12:27:04 swildner Exp $
36 * Copyright (c) 1986-1991 by Sun Microsystems Inc.
41 * Simplified front end to rpc.
45 * This interface creates a virtual listener for all the services
46 * started thru rpc_reg(). It listens on the same endpoint for
47 * all the services and then executes the corresponding service
48 * for the given prognum and procnum.
51 #include "namespace.h"
52 #include "reentrant.h"
53 #include <sys/types.h>
55 #include <rpc/nettype.h>
60 #include "un-namespace.h"
65 static void universal(struct svc_req *, SVCXPRT *);
67 static struct proglst {
68 char *(*p_progname)(char *);
76 xdrproc_t p_inproc, p_outproc;
77 struct proglst *p_nxt;
80 static const char rpc_reg_err[] = "%s: %s";
81 static const char rpc_reg_msg[] = "rpc_reg: ";
82 static const char __reg_err1[] = "can't find appropriate transport";
83 static const char __reg_err2[] = "can't get protocol info";
84 static const char __reg_err3[] = "unsupported transport size";
85 static const char __no_mem_str[] = "out of memory";
88 * For simplified, easy to use kind of rpc interfaces.
89 * nettype indicates the type of transport on which the service will be
90 * listening. Used for conservation of the system resource. Only one
91 * handle is created for all the services (actually one of each netid)
92 * and same xdrbuf is used for same netid. The size of the arguments
93 * is also limited by the recvsize for that transport, even if it is
94 * a COTS transport. This may be wrong, but for cases like these, they
95 * should not use the simplified interfaces like this.
99 rpc_reg(rpcprog_t prognum, /* program number */
100 rpcvers_t versnum, /* version number */
101 rpcproc_t procnum, /* procedure number */
102 char *(*progname)(char *), /* Server routine */
103 xdrproc_t inproc, xdrproc_t outproc, /* in/out XDR procedures */
104 char *nettype) /* nettype */
106 struct netconfig *nconf;
111 if (procnum == NULLPROC) {
112 warnx("%s can't reassign procedure number %u", rpc_reg_msg,
118 nettype = "netpath"; /* The default behavior */
119 if ((handle = __rpc_setconf(nettype)) == NULL) {
120 warnx(rpc_reg_err, rpc_reg_msg, __reg_err1);
123 /* VARIABLES PROTECTED BY proglst_lock: proglst */
124 mutex_lock(&proglst_lock);
125 while ((nconf = __rpc_getconf(handle)) != NULL) {
136 xdrbuf = netid = NULL;
137 for (pl = proglst; pl; pl = pl->p_nxt) {
138 if (strcmp(pl->p_netid, nconf->nc_netid) == 0) {
139 svcxprt = pl->p_transp;
140 xdrbuf = pl->p_xdrbuf;
141 recvsz = pl->p_recvsz;
147 if (svcxprt == NULL) {
148 struct __rpc_sockinfo si;
150 svcxprt = svc_tli_create(RPC_ANYFD, nconf, NULL, 0, 0);
153 if (!__rpc_fd2sockinfo(svcxprt->xp_fd, &si)) {
154 warnx(rpc_reg_err, rpc_reg_msg, __reg_err2);
155 SVC_DESTROY(svcxprt);
158 recvsz = __rpc_get_t_size(si.si_af, si.si_proto, 0);
160 warnx(rpc_reg_err, rpc_reg_msg, __reg_err3);
161 SVC_DESTROY(svcxprt);
164 if (((xdrbuf = malloc((unsigned)recvsz)) == NULL) ||
165 ((netid = strdup(nconf->nc_netid)) == NULL)) {
166 warnx(rpc_reg_err, rpc_reg_msg, __no_mem_str);
171 SVC_DESTROY(svcxprt);
177 * Check if this (program, version, netid) had already been
178 * registered. The check may save a few RPC calls to rpcbind
180 for (pl = proglst; pl; pl = pl->p_nxt)
181 if ((pl->p_prognum == prognum) &&
182 (pl->p_versnum == versnum) &&
183 (strcmp(pl->p_netid, netid) == 0))
185 if (pl == NULL) { /* Not yet */
186 rpcb_unset(prognum, versnum, nconf);
188 /* so that svc_reg does not call rpcb_set() */
192 if (!svc_reg(svcxprt, prognum, versnum, universal, nconf)) {
193 warnx("%s couldn't register prog %u vers %u for %s",
194 rpc_reg_msg, (unsigned)prognum,
195 (unsigned)versnum, netid);
197 SVC_DESTROY(svcxprt);
204 pl = malloc(sizeof (struct proglst));
206 warnx(rpc_reg_err, rpc_reg_msg, __no_mem_str);
208 SVC_DESTROY(svcxprt);
214 pl->p_progname = progname;
215 pl->p_prognum = prognum;
216 pl->p_versnum = versnum;
217 pl->p_procnum = procnum;
218 pl->p_inproc = inproc;
219 pl->p_outproc = outproc;
220 pl->p_transp = svcxprt;
221 pl->p_xdrbuf = xdrbuf;
222 pl->p_recvsz = recvsz;
228 __rpc_endconf(handle);
229 mutex_unlock(&proglst_lock);
232 warnx("%s can't find suitable transport for %s",
233 rpc_reg_msg, nettype);
240 * The universal handler for the services registered using registerrpc.
241 * It handles both the connectionless and the connection oriented cases.
245 universal(struct svc_req *rqstp, SVCXPRT *transp)
255 * enforce "procnum 0 is echo" convention
257 if (rqstp->rq_proc == NULLPROC) {
258 if (svc_sendreply(transp, (xdrproc_t) xdr_void, NULL) ==
260 warnx("svc_sendreply failed");
264 prog = rqstp->rq_prog;
265 vers = rqstp->rq_vers;
266 proc = rqstp->rq_proc;
267 mutex_lock(&proglst_lock);
268 for (pl = proglst; pl; pl = pl->p_nxt)
269 if (pl->p_prognum == prog && pl->p_procnum == proc &&
270 pl->p_versnum == vers &&
271 (strcmp(pl->p_netid, transp->xp_netid) == 0)) {
272 /* decode arguments into a CLEAN buffer */
273 xdrbuf = pl->p_xdrbuf;
274 /* Zero the arguments: reqd ! */
275 memset(xdrbuf, 0, sizeof (pl->p_recvsz));
277 * Assuming that sizeof (xdrbuf) would be enough
278 * for the arguments; if not then the program
281 if (!svc_getargs(transp, pl->p_inproc, xdrbuf)) {
282 svcerr_decode(transp);
283 mutex_unlock(&proglst_lock);
286 outdata = (*(pl->p_progname))(xdrbuf);
287 if (outdata == NULL &&
288 pl->p_outproc != (xdrproc_t) xdr_void){
289 /* there was an error */
290 mutex_unlock(&proglst_lock);
293 if (!svc_sendreply(transp, pl->p_outproc, outdata)) {
295 "rpc: rpc_reg trouble replying to prog %u vers %u",
296 (unsigned)prog, (unsigned)vers);
297 mutex_unlock(&proglst_lock);
300 /* free the decoded arguments */
301 svc_freeargs(transp, pl->p_inproc, xdrbuf);
302 mutex_unlock(&proglst_lock);
305 mutex_unlock(&proglst_lock);
306 /* This should never happen */
307 warnx("rpc: rpc_reg: never registered prog %u vers %u",
308 (unsigned)prog, (unsigned)vers);