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svc_simple.c revision 1.6 
      1 /*	$NetBSD: svc_simple.c,v 1.6 1997/07/13 20:13:24 christos 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 #include <sys/cdefs.h>
     33 #if defined(LIBC_SCCS) && !defined(lint)
     34 #if 0
     35 static char *sccsid = "@(#)svc_simple.c 1.18 87/08/11 Copyr 1984 Sun Micro";
     36 static char *sccsid = "@(#)svc_simple.c	2.2 88/08/01 4.0 RPCSRC";
     37 #else
     38 __RCSID("$NetBSD: svc_simple.c,v 1.6 1997/07/13 20:13:24 christos Exp $");
     39 #endif
     40 #endif
     41 
     42 /*
     43  * svc_simple.c
     44  * Simplified front end to rpc.
     45  *
     46  * Copyright (C) 1984, Sun Microsystems, Inc.
     47  */
     48 
     49 #include <stdio.h>
     50 #include <stdlib.h>
     51 #include <string.h>
     52 #include <rpc/rpc.h>
     53 #include <rpc/pmap_clnt.h>
     54 #include <sys/socket.h>
     55 #include <netdb.h>
     56 
     57 static struct proglst {
     58 	char *(*p_progname) __P((char [UDPMSGSIZE]));
     59 	int  p_prognum;
     60 	int  p_procnum;
     61 	xdrproc_t p_inproc, p_outproc;
     62 	struct proglst *p_nxt;
     63 } *proglst;
     64 
     65 static SVCXPRT *transp;
     66 struct proglst *pl;
     67 
     68 static void universal __P((struct svc_req *, SVCXPRT *));
     69 
     70 int
     71 registerrpc(prognum, versnum, procnum, progname, inproc, outproc)
     72 	char *(*progname) __P((char [UDPMSGSIZE]));
     73 	xdrproc_t inproc, outproc;
     74 {
     75 
     76 	if (procnum == NULLPROC) {
     77 		(void) fprintf(stderr,
     78 		    "can't reassign procedure number %ld\n", NULLPROC);
     79 		return (-1);
     80 	}
     81 	if (transp == 0) {
     82 		transp = svcudp_create(RPC_ANYSOCK);
     83 		if (transp == NULL) {
     84 			(void) fprintf(stderr, "couldn't create an rpc server\n");
     85 			return (-1);
     86 		}
     87 	}
     88 	(void) pmap_unset((u_long)prognum, (u_long)versnum);
     89 	if (!svc_register(transp, (u_long)prognum, (u_long)versnum,
     90 	    universal, IPPROTO_UDP)) {
     91 	    	(void) fprintf(stderr, "couldn't register prog %d vers %d\n",
     92 		    prognum, versnum);
     93 		return (-1);
     94 	}
     95 	pl = (struct proglst *)malloc(sizeof(struct proglst));
     96 	if (pl == NULL) {
     97 		(void) fprintf(stderr, "registerrpc: out of memory\n");
     98 		return (-1);
     99 	}
    100 	pl->p_progname = progname;
    101 	pl->p_prognum = prognum;
    102 	pl->p_procnum = procnum;
    103 	pl->p_inproc = inproc;
    104 	pl->p_outproc = outproc;
    105 	pl->p_nxt = proglst;
    106 	proglst = pl;
    107 	return (0);
    108 }
    109 
    110 static void
    111 universal(rqstp, transp)
    112 	struct svc_req *rqstp;
    113 	SVCXPRT *transp;
    114 {
    115 	int prog, proc;
    116 	char *outdata;
    117 	char xdrbuf[UDPMSGSIZE];
    118 	struct proglst *pl;
    119 
    120 	/*
    121 	 * enforce "procnum 0 is echo" convention
    122 	 */
    123 	if (rqstp->rq_proc == NULLPROC) {
    124 		if (svc_sendreply(transp, xdr_void, NULL) == FALSE) {
    125 			(void) fprintf(stderr, "xxx\n");
    126 			exit(1);
    127 		}
    128 		return;
    129 	}
    130 	prog = rqstp->rq_prog;
    131 	proc = rqstp->rq_proc;
    132 	for (pl = proglst; pl != NULL; pl = pl->p_nxt)
    133 		if (pl->p_prognum == prog && pl->p_procnum == proc) {
    134 			/* decode arguments into a CLEAN buffer */
    135 			memset(xdrbuf, 0, sizeof(xdrbuf)); /* required ! */
    136 			if (!svc_getargs(transp, pl->p_inproc, xdrbuf)) {
    137 				svcerr_decode(transp);
    138 				return;
    139 			}
    140 			outdata = (*(pl->p_progname))(xdrbuf);
    141 			if (outdata == NULL &&
    142 			    pl->p_outproc != xdr_void)
    143 				/* there was an error */
    144 				return;
    145 			if (!svc_sendreply(transp, pl->p_outproc, outdata)) {
    146 				(void) fprintf(stderr,
    147 				    "trouble replying to prog %d\n",
    148 				    pl->p_prognum);
    149 				exit(1);
    150 			}
    151 			/* free the decoded arguments */
    152 			(void)svc_freeargs(transp, pl->p_inproc, xdrbuf);
    153 			return;
    154 		}
    155 	(void) fprintf(stderr, "never registered prog %d\n", prog);
    156 	exit(1);
    157 }
    158 
    159