svc_simple.c revision 1.4 
1/*
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.
8 *
9 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
10 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
11 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
12 *
13 * Sun RPC is provided with no support and without any obligation on the
14 * part of Sun Microsystems, Inc. to assist in its use, correction,
15 * modification or enhancement.
16 *
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.
20 *
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.
24 *
25 * Sun Microsystems, Inc.
26 * 2550 Garcia Avenue
27 * Mountain View, California  94043
28 */
29
30#if defined(LIBC_SCCS) && !defined(lint)
31static char *rcsid = "$OpenBSD: svc_simple.c,v 1.4 1996/09/15 09:31:41 tholo Exp $";
32#endif /* LIBC_SCCS and not lint */
33
34/*
35 * svc_simple.c
36 * Simplified front end to rpc.
37 *
38 * Copyright (C) 1984, Sun Microsystems, Inc.
39 */
40
41#include <stdio.h>
42#include <stdlib.h>
43#include <string.h>
44#include <rpc/rpc.h>
45#include <sys/socket.h>
46#include <netdb.h>
47
48static struct proglst {
49	char *(*p_progname)();
50	int  p_prognum;
51	int  p_procnum;
52	xdrproc_t p_inproc, p_outproc;
53	struct proglst *p_nxt;
54} *proglst;
55static void universal();
56static SVCXPRT *transp;
57struct proglst *pl;
58
59registerrpc(prognum, versnum, procnum, progname, inproc, outproc)
60	int prognum, versnum, procnum;
61	char *(*progname)();
62	xdrproc_t inproc, outproc;
63{
64
65	if (procnum == NULLPROC) {
66		(void) fprintf(stderr,
67		    "can't reassign procedure number %d\n", NULLPROC);
68		return (-1);
69	}
70	if (transp == 0) {
71		transp = svcudp_create(RPC_ANYSOCK);
72		if (transp == NULL) {
73			(void) fprintf(stderr, "couldn't create an rpc server\n");
74			return (-1);
75		}
76	}
77	(void) pmap_unset((u_long)prognum, (u_long)versnum);
78	if (!svc_register(transp, (u_long)prognum, (u_long)versnum,
79	    universal, IPPROTO_UDP)) {
80	    	(void) fprintf(stderr, "couldn't register prog %d vers %d\n",
81		    prognum, versnum);
82		return (-1);
83	}
84	pl = (struct proglst *)malloc(sizeof(struct proglst));
85	if (pl == NULL) {
86		(void) fprintf(stderr, "registerrpc: out of memory\n");
87		return (-1);
88	}
89	pl->p_progname = progname;
90	pl->p_prognum = prognum;
91	pl->p_procnum = procnum;
92	pl->p_inproc = inproc;
93	pl->p_outproc = outproc;
94	pl->p_nxt = proglst;
95	proglst = pl;
96	return (0);
97}
98
99static void
100universal(rqstp, transp)
101	struct svc_req *rqstp;
102	SVCXPRT *transp;
103{
104	int prog, proc;
105	char *outdata;
106	char xdrbuf[UDPMSGSIZE];
107	struct proglst *pl;
108
109	/*
110	 * enforce "procnum 0 is echo" convention
111	 */
112	if (rqstp->rq_proc == NULLPROC) {
113		if (svc_sendreply(transp, xdr_void, NULL) == FALSE) {
114			(void) fprintf(stderr, "xxx\n");
115			exit(1);
116		}
117		return;
118	}
119	prog = rqstp->rq_prog;
120	proc = rqstp->rq_proc;
121	for (pl = proglst; pl != NULL; pl = pl->p_nxt)
122		if (pl->p_prognum == prog && pl->p_procnum == proc) {
123			/* decode arguments into a CLEAN buffer */
124			memset(xdrbuf, 0, sizeof(xdrbuf)); /* required ! */
125			if (!svc_getargs(transp, pl->p_inproc, xdrbuf)) {
126				svcerr_decode(transp);
127				return;
128			}
129			outdata = (*(pl->p_progname))(xdrbuf);
130			if (outdata == NULL &&
131			    pl->p_outproc != xdr_void)
132				/* there was an error */
133				return;
134			if (!svc_sendreply(transp, pl->p_outproc, outdata)) {
135				(void) fprintf(stderr,
136				    "trouble replying to prog %d\n",
137				    pl->p_prognum);
138				exit(1);
139			}
140			/* free the decoded arguments */
141			(void)svc_freeargs(transp, pl->p_inproc, xdrbuf);
142			return;
143		}
144	(void) fprintf(stderr, "never registered prog %d\n", prog);
145	exit(1);
146}
147
148