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svc_simple.c revision 1.10 
      1 /*	$NetBSD: svc_simple.c,v 1.10 1998/02/13 05:52:37 lukem 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 1.10 1998/02/13 05:52:37 lukem 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 "namespace.h"
     50 
     51 #include <sys/types.h>
     52 #include <sys/socket.h>
     53 
     54 #include <err.h>
     55 #include <netdb.h>
     56 #include <stdio.h>
     57 #include <stdlib.h>
     58 #include <string.h>
     59 
     60 #include <rpc/rpc.h>
     61 #include <rpc/pmap_clnt.h>
     62 
     63 #ifdef __weak_alias
     64 __weak_alias(registerrpc,_registerrpc);
     65 #endif
     66 
     67 static struct proglst {
     68 	char *(*p_progname) __P((char [UDPMSGSIZE]));
     69 	int  p_prognum;
     70 	int  p_procnum;
     71 	xdrproc_t p_inproc, p_outproc;
     72 	struct proglst *p_nxt;
     73 } *proglst;
     74 
     75 static SVCXPRT *transp;
     76 struct proglst *pl;
     77 
     78 static void universal __P((struct svc_req *, SVCXPRT *));
     79 
     80 int
     81 registerrpc(prognum, versnum, procnum, progname, inproc, outproc)
     82 	char *(*progname) __P((char [UDPMSGSIZE]));
     83 	xdrproc_t inproc, outproc;
     84 {
     85 
     86 	if (procnum == NULLPROC) {
     87 		warnx("can't reassign procedure number %ld", NULLPROC);
     88 		return (-1);
     89 	}
     90 	if (transp == 0) {
     91 		transp = svcudp_create(RPC_ANYSOCK);
     92 		if (transp == NULL) {
     93 			warnx("couldn't create an rpc server");
     94 			return (-1);
     95 		}
     96 	}
     97 	(void) pmap_unset((u_long)prognum, (u_long)versnum);
     98 	if (!svc_register(transp, (u_long)prognum, (u_long)versnum,
     99 	    universal, IPPROTO_UDP)) {
    100 	    	warnx("couldn't register prog %d vers %d", prognum, versnum);
    101 		return (-1);
    102 	}
    103 	pl = (struct proglst *)malloc(sizeof(struct proglst));
    104 	if (pl == NULL) {
    105 		warnx("registerrpc: out of memory");
    106 		return (-1);
    107 	}
    108 	pl->p_progname = progname;
    109 	pl->p_prognum = prognum;
    110 	pl->p_procnum = procnum;
    111 	pl->p_inproc = inproc;
    112 	pl->p_outproc = outproc;
    113 	pl->p_nxt = proglst;
    114 	proglst = pl;
    115 	return (0);
    116 }
    117 
    118 static void
    119 universal(rqstp, transp)
    120 	struct svc_req *rqstp;
    121 	SVCXPRT *transp;
    122 {
    123 	int prog, proc;
    124 	char *outdata;
    125 	char xdrbuf[UDPMSGSIZE];
    126 	struct proglst *pl;
    127 
    128 	/*
    129 	 * enforce "procnum 0 is echo" convention
    130 	 */
    131 	if (rqstp->rq_proc == NULLPROC) {
    132 		if (svc_sendreply(transp, xdr_void, NULL) == FALSE) {
    133 			errx(1, "svc_sendreply failed");
    134 			exit(1);
    135 		}
    136 		return;
    137 	}
    138 	prog = rqstp->rq_prog;
    139 	proc = rqstp->rq_proc;
    140 	for (pl = proglst; pl != NULL; pl = pl->p_nxt)
    141 		if (pl->p_prognum == prog && pl->p_procnum == proc) {
    142 			/* decode arguments into a CLEAN buffer */
    143 			memset(xdrbuf, 0, sizeof(xdrbuf)); /* required ! */
    144 			if (!svc_getargs(transp, pl->p_inproc, xdrbuf)) {
    145 				svcerr_decode(transp);
    146 				return;
    147 			}
    148 			outdata = (*(pl->p_progname))(xdrbuf);
    149 			if (outdata == NULL &&
    150 			    pl->p_outproc != xdr_void)
    151 				/* there was an error */
    152 				return;
    153 			if (!svc_sendreply(transp, pl->p_outproc, outdata))
    154 				errx(1, "trouble replying to prog %d",
    155 				    pl->p_prognum);
    156 			/* free the decoded arguments */
    157 			(void)svc_freeargs(transp, pl->p_inproc, xdrbuf);
    158 			return;
    159 		}
    160 	errx(1, "never registered prog %d", prog);
    161 }
    162 
    163