Home | History | Annotate | Line # | Download | only in rpc
svc_simple.c revision 1.5 
      1 /*	$NetBSD: svc_simple.c,v 1.5 1996/03/29 23:00:55 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 1996/03/29 23:00:55 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 int
     64 registerrpc(prognum, versnum, procnum, progname, inproc, outproc)
     65 	char *(*progname)();
     66 	xdrproc_t inproc, outproc;
     67 {
     68 
     69 	if (procnum == NULLPROC) {
     70 		(void) fprintf(stderr,
     71 		    "can't reassign procedure number %d\n", NULLPROC);
     72 		return (-1);
     73 	}
     74 	if (transp == 0) {
     75 		transp = svcudp_create(RPC_ANYSOCK);
     76 		if (transp == NULL) {
     77 			(void) fprintf(stderr, "couldn't create an rpc server\n");
     78 			return (-1);
     79 		}
     80 	}
     81 	(void) pmap_unset((u_long)prognum, (u_long)versnum);
     82 	if (!svc_register(transp, (u_long)prognum, (u_long)versnum,
     83 	    universal, IPPROTO_UDP)) {
     84 	    	(void) fprintf(stderr, "couldn't register prog %d vers %d\n",
     85 		    prognum, versnum);
     86 		return (-1);
     87 	}
     88 	pl = (struct proglst *)malloc(sizeof(struct proglst));
     89 	if (pl == NULL) {
     90 		(void) fprintf(stderr, "registerrpc: out of memory\n");
     91 		return (-1);
     92 	}
     93 	pl->p_progname = progname;
     94 	pl->p_prognum = prognum;
     95 	pl->p_procnum = procnum;
     96 	pl->p_inproc = inproc;
     97 	pl->p_outproc = outproc;
     98 	pl->p_nxt = proglst;
     99 	proglst = pl;
    100 	return (0);
    101 }
    102 
    103 static void
    104 universal(rqstp, transp)
    105 	struct svc_req *rqstp;
    106 	SVCXPRT *transp;
    107 {
    108 	int prog, proc;
    109 	char *outdata;
    110 	char xdrbuf[UDPMSGSIZE];
    111 	struct proglst *pl;
    112 
    113 	/*
    114 	 * enforce "procnum 0 is echo" convention
    115 	 */
    116 	if (rqstp->rq_proc == NULLPROC) {
    117 		if (svc_sendreply(transp, xdr_void, NULL) == FALSE) {
    118 			(void) fprintf(stderr, "xxx\n");
    119 			exit(1);
    120 		}
    121 		return;
    122 	}
    123 	prog = rqstp->rq_prog;
    124 	proc = rqstp->rq_proc;
    125 	for (pl = proglst; pl != NULL; pl = pl->p_nxt)
    126 		if (pl->p_prognum == prog && pl->p_procnum == proc) {
    127 			/* decode arguments into a CLEAN buffer */
    128 			memset(xdrbuf, 0, sizeof(xdrbuf)); /* required ! */
    129 			if (!svc_getargs(transp, pl->p_inproc, xdrbuf)) {
    130 				svcerr_decode(transp);
    131 				return;
    132 			}
    133 			outdata = (*(pl->p_progname))(xdrbuf);
    134 			if (outdata == NULL &&
    135 			    pl->p_outproc != xdr_void)
    136 				/* there was an error */
    137 				return;
    138 			if (!svc_sendreply(transp, pl->p_outproc, outdata)) {
    139 				(void) fprintf(stderr,
    140 				    "trouble replying to prog %d\n",
    141 				    pl->p_prognum);
    142 				exit(1);
    143 			}
    144 			/* free the decoded arguments */
    145 			(void)svc_freeargs(transp, pl->p_inproc, xdrbuf);
    146 			return;
    147 		}
    148 	(void) fprintf(stderr, "never registered prog %d\n", prog);
    149 	exit(1);
    150 }
    151 
    152