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svc_simple.c revision 1.5.2.1 
      1 /*	$NetBSD: svc_simple.c,v 1.5.2.1 1996/09/16 23:44:40 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 1.5.2.1 1996/09/16 23:44:40 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 "namespace.h"
     46 #include <stdio.h>
     47 #include <stdlib.h>
     48 #include <string.h>
     49 #include <rpc/rpc.h>
     50 #include <sys/socket.h>
     51 #include <netdb.h>
     52 
     53 #ifdef __weak_alias
     54 __weak_alias(registerrpc,_registerrpc);
     55 #endif
     56 
     57 static struct proglst {
     58 	char *(*p_progname)();
     59 	int  p_prognum;
     60 	int  p_procnum;
     61 	xdrproc_t p_inproc, p_outproc;
     62 	struct proglst *p_nxt;
     63 } *proglst;
     64 static void universal();
     65 static SVCXPRT *transp;
     66 struct proglst *pl;
     67 
     68 int
     69 registerrpc(prognum, versnum, procnum, progname, inproc, outproc)
     70 	char *(*progname)();
     71 	xdrproc_t inproc, outproc;
     72 {
     73 
     74 	if (procnum == NULLPROC) {
     75 		(void) fprintf(stderr,
     76 		    "can't reassign procedure number %d\n", NULLPROC);
     77 		return (-1);
     78 	}
     79 	if (transp == 0) {
     80 		transp = svcudp_create(RPC_ANYSOCK);
     81 		if (transp == NULL) {
     82 			(void) fprintf(stderr, "couldn't create an rpc server\n");
     83 			return (-1);
     84 		}
     85 	}
     86 	(void) pmap_unset((u_long)prognum, (u_long)versnum);
     87 	if (!svc_register(transp, (u_long)prognum, (u_long)versnum,
     88 	    universal, IPPROTO_UDP)) {
     89 	    	(void) fprintf(stderr, "couldn't register prog %d vers %d\n",
     90 		    prognum, versnum);
     91 		return (-1);
     92 	}
     93 	pl = (struct proglst *)malloc(sizeof(struct proglst));
     94 	if (pl == NULL) {
     95 		(void) fprintf(stderr, "registerrpc: out of memory\n");
     96 		return (-1);
     97 	}
     98 	pl->p_progname = progname;
     99 	pl->p_prognum = prognum;
    100 	pl->p_procnum = procnum;
    101 	pl->p_inproc = inproc;
    102 	pl->p_outproc = outproc;
    103 	pl->p_nxt = proglst;
    104 	proglst = pl;
    105 	return (0);
    106 }
    107 
    108 static void
    109 universal(rqstp, transp)
    110 	struct svc_req *rqstp;
    111 	SVCXPRT *transp;
    112 {
    113 	int prog, proc;
    114 	char *outdata;
    115 	char xdrbuf[UDPMSGSIZE];
    116 	struct proglst *pl;
    117 
    118 	/*
    119 	 * enforce "procnum 0 is echo" convention
    120 	 */
    121 	if (rqstp->rq_proc == NULLPROC) {
    122 		if (svc_sendreply(transp, xdr_void, NULL) == FALSE) {
    123 			(void) fprintf(stderr, "xxx\n");
    124 			exit(1);
    125 		}
    126 		return;
    127 	}
    128 	prog = rqstp->rq_prog;
    129 	proc = rqstp->rq_proc;
    130 	for (pl = proglst; pl != NULL; pl = pl->p_nxt)
    131 		if (pl->p_prognum == prog && pl->p_procnum == proc) {
    132 			/* decode arguments into a CLEAN buffer */
    133 			memset(xdrbuf, 0, sizeof(xdrbuf)); /* required ! */
    134 			if (!svc_getargs(transp, pl->p_inproc, xdrbuf)) {
    135 				svcerr_decode(transp);
    136 				return;
    137 			}
    138 			outdata = (*(pl->p_progname))(xdrbuf);
    139 			if (outdata == NULL &&
    140 			    pl->p_outproc != xdr_void)
    141 				/* there was an error */
    142 				return;
    143 			if (!svc_sendreply(transp, pl->p_outproc, outdata)) {
    144 				(void) fprintf(stderr,
    145 				    "trouble replying to prog %d\n",
    146 				    pl->p_prognum);
    147 				exit(1);
    148 			}
    149 			/* free the decoded arguments */
    150 			(void)svc_freeargs(transp, pl->p_inproc, xdrbuf);
    151 			return;
    152 		}
    153 	(void) fprintf(stderr, "never registered prog %d\n", prog);
    154 	exit(1);
    155 }
    156 
    157