svc_simple.c revision 1901 
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)
31/*static char *sccsid = "from: @(#)svc_simple.c 1.18 87/08/11 Copyr 1984 Sun Micro";*/
32/*static char *sccsid = "from: @(#)svc_simple.c	2.2 88/08/01 4.0 RPCSRC";*/
33static char *rcsid = "$Id: svc_simple.c,v 1.1 1993/10/27 05:41:01 paul Exp $";
34#endif
35
36/*
37 * svc_simple.c
38 * Simplified front end to rpc.
39 *
40 * Copyright (C) 1984, Sun Microsystems, Inc.
41 */
42
43#include <stdio.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	char *(*progname)();
61	xdrproc_t inproc, outproc;
62{
63
64	if (procnum == NULLPROC) {
65		(void) fprintf(stderr,
66		    "can't reassign procedure number %d\n", NULLPROC);
67		return (-1);
68	}
69	if (transp == 0) {
70		transp = svcudp_create(RPC_ANYSOCK);
71		if (transp == NULL) {
72			(void) fprintf(stderr, "couldn't create an rpc server\n");
73			return (-1);
74		}
75	}
76	(void) pmap_unset((u_long)prognum, (u_long)versnum);
77	if (!svc_register(transp, (u_long)prognum, (u_long)versnum,
78	    universal, IPPROTO_UDP)) {
79	    	(void) fprintf(stderr, "couldn't register prog %d vers %d\n",
80		    prognum, versnum);
81		return (-1);
82	}
83	pl = (struct proglst *)malloc(sizeof(struct proglst));
84	if (pl == NULL) {
85		(void) fprintf(stderr, "registerrpc: out of memory\n");
86		return (-1);
87	}
88	pl->p_progname = progname;
89	pl->p_prognum = prognum;
90	pl->p_procnum = procnum;
91	pl->p_inproc = inproc;
92	pl->p_outproc = outproc;
93	pl->p_nxt = proglst;
94	proglst = pl;
95	return (0);
96}
97
98static void
99universal(rqstp, transp)
100	struct svc_req *rqstp;
101	SVCXPRT *transp;
102{
103	int prog, proc;
104	char *outdata;
105	char xdrbuf[UDPMSGSIZE];
106	struct proglst *pl;
107
108	/*
109	 * enforce "procnum 0 is echo" convention
110	 */
111	if (rqstp->rq_proc == NULLPROC) {
112		if (svc_sendreply(transp, xdr_void, (char *)NULL) == FALSE) {
113			(void) fprintf(stderr, "xxx\n");
114			exit(1);
115		}
116		return;
117	}
118	prog = rqstp->rq_prog;
119	proc = rqstp->rq_proc;
120	for (pl = proglst; pl != NULL; pl = pl->p_nxt)
121		if (pl->p_prognum == prog && pl->p_procnum == proc) {
122			/* decode arguments into a CLEAN buffer */
123			bzero(xdrbuf, sizeof(xdrbuf)); /* required ! */
124			if (!svc_getargs(transp, pl->p_inproc, xdrbuf)) {
125				svcerr_decode(transp);
126				return;
127			}
128			outdata = (*(pl->p_progname))(xdrbuf);
129			if (outdata == NULL && pl->p_outproc != xdr_void)
130				/* there was an error */
131				return;
132			if (!svc_sendreply(transp, pl->p_outproc, outdata)) {
133				(void) fprintf(stderr,
134				    "trouble replying to prog %d\n",
135				    pl->p_prognum);
136				exit(1);
137			}
138			/* free the decoded arguments */
139			(void)svc_freeargs(transp, pl->p_inproc, xdrbuf);
140			return;
141		}
142	(void) fprintf(stderr, "never registered prog %d\n", prog);
143	exit(1);
144}
145
146