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svc_simple.c revision 1.2 
      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";*/
     33 static char *rcsid = "$Id: svc_simple.c,v 1.2 1994/12/04 01:13:28 cgd 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 <stdlib.h>
     45 #include <rpc/rpc.h>
     46 #include <sys/socket.h>
     47 #include <netdb.h>
     48 
     49 static struct proglst {
     50 	char *(*p_progname)();
     51 	int  p_prognum;
     52 	int  p_procnum;
     53 	xdrproc_t p_inproc, p_outproc;
     54 	struct proglst *p_nxt;
     55 } *proglst;
     56 static void universal();
     57 static SVCXPRT *transp;
     58 struct proglst *pl;
     59 
     60 registerrpc(prognum, versnum, procnum, progname, inproc, outproc)
     61 	char *(*progname)();
     62 	xdrproc_t inproc, outproc;
     63 {
     64 
     65 	if (procnum == NULLPROC) {
     66 		(void) fprintf(stderr,
     67 		    "can't reassign procedure number %d\n", NULLPROC);
     68 		return (-1);
     69 	}
     70 	if (transp == 0) {
     71 		transp = svcudp_create(RPC_ANYSOCK);
     72 		if (transp == NULL) {
     73 			(void) fprintf(stderr, "couldn't create an rpc server\n");
     74 			return (-1);
     75 		}
     76 	}
     77 	(void) pmap_unset((u_long)prognum, (u_long)versnum);
     78 	if (!svc_register(transp, (u_long)prognum, (u_long)versnum,
     79 	    universal, IPPROTO_UDP)) {
     80 	    	(void) fprintf(stderr, "couldn't register prog %d vers %d\n",
     81 		    prognum, versnum);
     82 		return (-1);
     83 	}
     84 	pl = (struct proglst *)malloc(sizeof(struct proglst));
     85 	if (pl == NULL) {
     86 		(void) fprintf(stderr, "registerrpc: out of memory\n");
     87 		return (-1);
     88 	}
     89 	pl->p_progname = progname;
     90 	pl->p_prognum = prognum;
     91 	pl->p_procnum = procnum;
     92 	pl->p_inproc = inproc;
     93 	pl->p_outproc = outproc;
     94 	pl->p_nxt = proglst;
     95 	proglst = pl;
     96 	return (0);
     97 }
     98 
     99 static void
    100 universal(rqstp, transp)
    101 	struct svc_req *rqstp;
    102 	SVCXPRT *transp;
    103 {
    104 	int prog, proc;
    105 	char *outdata;
    106 	char xdrbuf[UDPMSGSIZE];
    107 	struct proglst *pl;
    108 
    109 	/*
    110 	 * enforce "procnum 0 is echo" convention
    111 	 */
    112 	if (rqstp->rq_proc == NULLPROC) {
    113 		if (svc_sendreply(transp, xdr_void, NULL) == FALSE) {
    114 			(void) fprintf(stderr, "xxx\n");
    115 			exit(1);
    116 		}
    117 		return;
    118 	}
    119 	prog = rqstp->rq_prog;
    120 	proc = rqstp->rq_proc;
    121 	for (pl = proglst; pl != NULL; pl = pl->p_nxt)
    122 		if (pl->p_prognum == prog && pl->p_procnum == proc) {
    123 			/* decode arguments into a CLEAN buffer */
    124 			bzero(xdrbuf, sizeof(xdrbuf)); /* required ! */
    125 			if (!svc_getargs(transp, pl->p_inproc, xdrbuf)) {
    126 				svcerr_decode(transp);
    127 				return;
    128 			}
    129 			outdata = (*(pl->p_progname))(xdrbuf);
    130 			if (outdata == NULL &&
    131 			    pl->p_outproc != xdr_void)
    132 				/* there was an error */
    133 				return;
    134 			if (!svc_sendreply(transp, pl->p_outproc, outdata)) {
    135 				(void) fprintf(stderr,
    136 				    "trouble replying to prog %d\n",
    137 				    pl->p_prognum);
    138 				exit(1);
    139 			}
    140 			/* free the decoded arguments */
    141 			(void)svc_freeargs(transp, pl->p_inproc, xdrbuf);
    142 			return;
    143 		}
    144 	(void) fprintf(stderr, "never registered prog %d\n", prog);
    145 	exit(1);
    146 }
    147 
    148