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svc_simple.c revision 1.3 
      1 /*	$NetBSD: svc_simple.c,v 1.3 1995/02/25 03:02:00 cgd 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";*/
     35 static char *rcsid = "$NetBSD: svc_simple.c,v 1.3 1995/02/25 03:02:00 cgd 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 <rpc/rpc.h>
     48 #include <sys/socket.h>
     49 #include <netdb.h>
     50 
     51 static struct proglst {
     52 	char *(*p_progname)();
     53 	int  p_prognum;
     54 	int  p_procnum;
     55 	xdrproc_t p_inproc, p_outproc;
     56 	struct proglst *p_nxt;
     57 } *proglst;
     58 static void universal();
     59 static SVCXPRT *transp;
     60 struct proglst *pl;
     61 
     62 registerrpc(prognum, versnum, procnum, progname, inproc, outproc)
     63 	char *(*progname)();
     64 	xdrproc_t inproc, outproc;
     65 {
     66 
     67 	if (procnum == NULLPROC) {
     68 		(void) fprintf(stderr,
     69 		    "can't reassign procedure number %d\n", NULLPROC);
     70 		return (-1);
     71 	}
     72 	if (transp == 0) {
     73 		transp = svcudp_create(RPC_ANYSOCK);
     74 		if (transp == NULL) {
     75 			(void) fprintf(stderr, "couldn't create an rpc server\n");
     76 			return (-1);
     77 		}
     78 	}
     79 	(void) pmap_unset((u_long)prognum, (u_long)versnum);
     80 	if (!svc_register(transp, (u_long)prognum, (u_long)versnum,
     81 	    universal, IPPROTO_UDP)) {
     82 	    	(void) fprintf(stderr, "couldn't register prog %d vers %d\n",
     83 		    prognum, versnum);
     84 		return (-1);
     85 	}
     86 	pl = (struct proglst *)malloc(sizeof(struct proglst));
     87 	if (pl == NULL) {
     88 		(void) fprintf(stderr, "registerrpc: out of memory\n");
     89 		return (-1);
     90 	}
     91 	pl->p_progname = progname;
     92 	pl->p_prognum = prognum;
     93 	pl->p_procnum = procnum;
     94 	pl->p_inproc = inproc;
     95 	pl->p_outproc = outproc;
     96 	pl->p_nxt = proglst;
     97 	proglst = pl;
     98 	return (0);
     99 }
    100 
    101 static void
    102 universal(rqstp, transp)
    103 	struct svc_req *rqstp;
    104 	SVCXPRT *transp;
    105 {
    106 	int prog, proc;
    107 	char *outdata;
    108 	char xdrbuf[UDPMSGSIZE];
    109 	struct proglst *pl;
    110 
    111 	/*
    112 	 * enforce "procnum 0 is echo" convention
    113 	 */
    114 	if (rqstp->rq_proc == NULLPROC) {
    115 		if (svc_sendreply(transp, xdr_void, NULL) == FALSE) {
    116 			(void) fprintf(stderr, "xxx\n");
    117 			exit(1);
    118 		}
    119 		return;
    120 	}
    121 	prog = rqstp->rq_prog;
    122 	proc = rqstp->rq_proc;
    123 	for (pl = proglst; pl != NULL; pl = pl->p_nxt)
    124 		if (pl->p_prognum == prog && pl->p_procnum == proc) {
    125 			/* decode arguments into a CLEAN buffer */
    126 			bzero(xdrbuf, sizeof(xdrbuf)); /* required ! */
    127 			if (!svc_getargs(transp, pl->p_inproc, xdrbuf)) {
    128 				svcerr_decode(transp);
    129 				return;
    130 			}
    131 			outdata = (*(pl->p_progname))(xdrbuf);
    132 			if (outdata == NULL &&
    133 			    pl->p_outproc != xdr_void)
    134 				/* there was an error */
    135 				return;
    136 			if (!svc_sendreply(transp, pl->p_outproc, outdata)) {
    137 				(void) fprintf(stderr,
    138 				    "trouble replying to prog %d\n",
    139 				    pl->p_prognum);
    140 				exit(1);
    141 			}
    142 			/* free the decoded arguments */
    143 			(void)svc_freeargs(transp, pl->p_inproc, xdrbuf);
    144 			return;
    145 		}
    146 	(void) fprintf(stderr, "never registered prog %d\n", prog);
    147 	exit(1);
    148 }
    149 
    150