svc_simple.c revision 1.1 
1/*	$NetBSD: svc_simple.c,v 1.4 1995/04/14 19:48:28 jtc 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#if defined(LIBC_SCCS) && !defined(lint)
33/*static char *sccsid = "from: @(#)svc_simple.c 1.18 87/08/11 Copyr 1984 Sun Micro";*/
34/*static char *sccsid = "from: @(#)svc_simple.c	2.2 88/08/01 4.0 RPCSRC";*/
35static char *rcsid = "$NetBSD: svc_simple.c,v 1.4 1995/04/14 19:48:28 jtc Exp $";
36#endif
37
38/*
39 * svc_simple.c
40 * Simplified front end to rpc.
41 *
42 * Copyright (C) 1984, Sun Microsystems, Inc.
43 */
44
45#include <stdio.h>
46#include <stdlib.h>
47#include <string.h>
48#include <rpc/rpc.h>
49#include <sys/socket.h>
50#include <netdb.h>
51
52static struct proglst {
53	char *(*p_progname)();
54	int  p_prognum;
55	int  p_procnum;
56	xdrproc_t p_inproc, p_outproc;
57	struct proglst *p_nxt;
58} *proglst;
59static void universal();
60static SVCXPRT *transp;
61struct proglst *pl;
62
63registerrpc(prognum, versnum, procnum, progname, inproc, outproc)
64	char *(*progname)();
65	xdrproc_t inproc, outproc;
66{
67
68	if (procnum == NULLPROC) {
69		(void) fprintf(stderr,
70		    "can't reassign procedure number %d\n", NULLPROC);
71		return (-1);
72	}
73	if (transp == 0) {
74		transp = svcudp_create(RPC_ANYSOCK);
75		if (transp == NULL) {
76			(void) fprintf(stderr, "couldn't create an rpc server\n");
77			return (-1);
78		}
79	}
80	(void) pmap_unset((u_long)prognum, (u_long)versnum);
81	if (!svc_register(transp, (u_long)prognum, (u_long)versnum,
82	    universal, IPPROTO_UDP)) {
83	    	(void) fprintf(stderr, "couldn't register prog %d vers %d\n",
84		    prognum, versnum);
85		return (-1);
86	}
87	pl = (struct proglst *)malloc(sizeof(struct proglst));
88	if (pl == NULL) {
89		(void) fprintf(stderr, "registerrpc: out of memory\n");
90		return (-1);
91	}
92	pl->p_progname = progname;
93	pl->p_prognum = prognum;
94	pl->p_procnum = procnum;
95	pl->p_inproc = inproc;
96	pl->p_outproc = outproc;
97	pl->p_nxt = proglst;
98	proglst = pl;
99	return (0);
100}
101
102static void
103universal(rqstp, transp)
104	struct svc_req *rqstp;
105	SVCXPRT *transp;
106{
107	int prog, proc;
108	char *outdata;
109	char xdrbuf[UDPMSGSIZE];
110	struct proglst *pl;
111
112	/*
113	 * enforce "procnum 0 is echo" convention
114	 */
115	if (rqstp->rq_proc == NULLPROC) {
116		if (svc_sendreply(transp, xdr_void, NULL) == FALSE) {
117			(void) fprintf(stderr, "xxx\n");
118			exit(1);
119		}
120		return;
121	}
122	prog = rqstp->rq_prog;
123	proc = rqstp->rq_proc;
124	for (pl = proglst; pl != NULL; pl = pl->p_nxt)
125		if (pl->p_prognum == prog && pl->p_procnum == proc) {
126			/* decode arguments into a CLEAN buffer */
127			memset(xdrbuf, 0, sizeof(xdrbuf)); /* required ! */
128			if (!svc_getargs(transp, pl->p_inproc, xdrbuf)) {
129				svcerr_decode(transp);
130				return;
131			}
132			outdata = (*(pl->p_progname))(xdrbuf);
133			if (outdata == NULL &&
134			    pl->p_outproc != xdr_void)
135				/* there was an error */
136				return;
137			if (!svc_sendreply(transp, pl->p_outproc, outdata)) {
138				(void) fprintf(stderr,
139				    "trouble replying to prog %d\n",
140				    pl->p_prognum);
141				exit(1);
142			}
143			/* free the decoded arguments */
144			(void)svc_freeargs(transp, pl->p_inproc, xdrbuf);
145			return;
146		}
147	(void) fprintf(stderr, "never registered prog %d\n", prog);
148	exit(1);
149}
150
151