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Annotation of 43BSD/contrib/sunrpc/svc_simple.c, revision 1.1

1.1     ! root        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: #ifndef lint
        !            30: static char sccsid[] = "@(#)svc_simple.c 1.3 85/03/14 Copyr 1984 Sun Micro";
        !            31: #endif
        !            32: 
        !            33: /* 
        !            34:  * svc_simple.c
        !            35:  * Simplified front end to rpc.
        !            36:  *
        !            37:  * Copyright (C) 1984, Sun Microsystems, Inc.
        !            38:  */
        !            39: 
        !            40: #include <stdio.h>
        !            41: #include <rpc/rpc.h>
        !            42: #include <sys/socket.h>
        !            43: #include <sys/time.h>
        !            44: #include <netdb.h>
        !            45: 
        !            46: static struct proglst {
        !            47:        char *(*p_progname)();
        !            48:        int  p_prognum;
        !            49:        int  p_procnum;
        !            50:        xdrproc_t p_inproc, p_outproc;
        !            51:        struct proglst *p_nxt;
        !            52: } *proglst;
        !            53: int universal();
        !            54: 
        !            55: registerrpc(prognum, versnum, procnum, progname, inproc, outproc)
        !            56:        char *(*progname)();
        !            57:        xdrproc_t inproc, outproc;
        !            58: {
        !            59:        static SVCXPRT *transp;
        !            60:        static madetransp = 0;
        !            61:        struct proglst *pl;
        !            62:        
        !            63:        if (procnum == NULLPROC) {
        !            64:                fprintf(stderr,
        !            65:                    "can't reassign procedure number %d\n", NULLPROC);
        !            66:                return (-1);
        !            67:        }
        !            68:        if (!madetransp) {
        !            69:                madetransp = 1;
        !            70:                transp = svcudp_create(RPC_ANYSOCK);
        !            71:                if (transp == NULL) {
        !            72:                        fprintf(stderr, "couldn't create an rpc server\n");
        !            73:                        return (-1);
        !            74:                }
        !            75:        }
        !            76:        pmap_unset(prognum, versnum);
        !            77:        if (!svc_register(transp, prognum, versnum, universal, IPPROTO_UDP)) {
        !            78:                fprintf(stderr, "couldn't register prog %d vers %d\n",
        !            79:                    prognum, versnum);
        !            80:                return (-1);
        !            81:        }
        !            82:        pl = (struct proglst *)malloc(sizeof(struct proglst));
        !            83:        if (pl == NULL) {
        !            84:                fprintf(stderr, "registerrpc: out of memory\n");
        !            85:                return (-1);
        !            86:        }
        !            87:        pl->p_progname = progname;
        !            88:        pl->p_prognum = prognum;
        !            89:        pl->p_procnum = procnum;
        !            90:        pl->p_inproc = inproc;
        !            91:        pl->p_outproc = outproc;
        !            92:        pl->p_nxt = proglst;
        !            93:        proglst = pl;
        !            94:        return (0);
        !            95: }
        !            96: 
        !            97: static
        !            98: universal(rqstp, transp)
        !            99:        struct svc_req *rqstp;
        !           100:        SVCXPRT *transp;
        !           101: {
        !           102:        int prog, proc, i;
        !           103:        char *outdata;
        !           104:        char xdrbuf[UDPMSGSIZE];
        !           105:        struct proglst *pl;
        !           106: 
        !           107:        /* 
        !           108:         * enforce "procnum 0 is echo" convention
        !           109:         */
        !           110:        if (rqstp->rq_proc == NULLPROC) {
        !           111:                if (svc_sendreply(transp, xdr_void, 0) == FALSE) {
        !           112:                        fprintf(stderr, "xxx\n");
        !           113:                        exit(1);
        !           114:                }
        !           115:                return;
        !           116:        }
        !           117:        prog = rqstp->rq_prog;
        !           118:        proc = rqstp->rq_proc;
        !           119:        for (pl = proglst; pl != NULL; pl = pl->p_nxt)
        !           120:                if (pl->p_prognum == prog && pl->p_procnum == proc) {
        !           121:                        /* decode arguments into a CLEAN buffer */
        !           122:                        bzero(xdrbuf, sizeof(xdrbuf)); /* required ! */
        !           123:                        if (!svc_getargs(transp, pl->p_inproc, xdrbuf)) {
        !           124:                                svcerr_decode(transp);
        !           125:                                return;
        !           126:                        }
        !           127:                        outdata = (*(pl->p_progname))(xdrbuf);
        !           128:                        if (outdata == NULL && pl->p_outproc != xdr_void)
        !           129:                                /* there was an error */
        !           130:                                return;
        !           131:                        if (!svc_sendreply(transp, pl->p_outproc, outdata)) {
        !           132:                                fprintf(stderr,
        !           133:                                    "trouble replying to prog %d\n",
        !           134:                                    pl->p_prognum);
        !           135:                                exit(1);
        !           136:                        /* free the decoded arguments */
        !           137:                        (void)svc_freeargs(transp, pl->p_inproc, xdrbuf);
        !           138:                        }
        !           139:                        return;
        !           140:                }
        !           141:        fprintf(stderr, "never registered prog %d\n", prog);
        !           142:        exit(1);
        !           143: }
        !           144: 

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