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svc_simple.c revision 1.4 
      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";*/
     35 static 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 
     52 static 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;
     59 static void universal();
     60 static SVCXPRT *transp;
     61 struct proglst *pl;
     62 
     63 registerrpc(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 
    102 static void
    103 universal(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