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/* $OpenBSD: svc_simple.c,v 1.13 2015/09/01 19:54:01 deraadt Exp $ */ |
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/* |
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* Copyright (c) 2010, Oracle America, Inc. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions are |
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* met: |
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* |
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* * Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* * Redistributions in binary form must reproduce the above |
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* copyright notice, this list of conditions and the following |
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* disclaimer in the documentation and/or other materials |
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* provided with the distribution. |
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* * Neither the name of the "Oracle America, Inc." nor the names of its |
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* contributors may be used to endorse or promote products derived |
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* from this software without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
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* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, |
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE |
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* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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*/ |
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/* |
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* svc_simple.c |
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* Simplified front end to rpc. |
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*/ |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <string.h> |
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#include <rpc/rpc.h> |
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#include <rpc/pmap_clnt.h> |
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#include <sys/socket.h> |
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#include <netdb.h> |
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static struct proglst { |
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char *(*p_progname)(); |
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int p_prognum; |
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int p_procnum; |
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xdrproc_t p_inproc, p_outproc; |
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struct proglst *p_nxt; |
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} *proglst; |
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static void universal(struct svc_req *, SVCXPRT *); |
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static SVCXPRT *transp; |
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int |
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registerrpc(int prognum, int versnum, int procnum, char *(*progname)(), |
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xdrproc_t inproc, xdrproc_t outproc) |
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{ |
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struct proglst *pl; |
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if (procnum == NULLPROC) |
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return (-1); |
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if (transp == NULL) { |
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transp = svcudp_create(RPC_ANYSOCK); |
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if (transp == NULL) |
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return (-1); |
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} |
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(void) pmap_unset((u_long)prognum, (u_long)versnum); |
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if (!svc_register(transp, (u_long)prognum, (u_long)versnum, |
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universal, IPPROTO_UDP)) |
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return (-1); |
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pl = malloc(sizeof(struct proglst)); |
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if (pl == NULL) |
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return (-1); |
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pl->p_progname = progname; |
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pl->p_prognum = prognum; |
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pl->p_procnum = procnum; |
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pl->p_inproc = inproc; |
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pl->p_outproc = outproc; |
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pl->p_nxt = proglst; |
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proglst = pl; |
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return (0); |
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} |
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static void |
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universal(struct svc_req *rqstp, SVCXPRT *transp) |
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{ |
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int prog, proc; |
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char *outdata; |
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char xdrbuf[UDPMSGSIZE]; |
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struct proglst *pl; |
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/* |
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* enforce "procnum 0 is echo" convention |
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*/ |
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if (rqstp->rq_proc == NULLPROC) { |
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if (svc_sendreply(transp, xdr_void, NULL) == FALSE) |
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exit(1); |
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return; |
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} |
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prog = rqstp->rq_prog; |
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proc = rqstp->rq_proc; |
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for (pl = proglst; pl != NULL; pl = pl->p_nxt) |
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if (pl->p_prognum == prog && pl->p_procnum == proc) { |
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/* decode arguments into a CLEAN buffer */ |
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memset(xdrbuf, 0, sizeof(xdrbuf)); /* required ! */ |
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if (!svc_getargs(transp, pl->p_inproc, xdrbuf)) { |
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svcerr_decode(transp); |
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return; |
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} |
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outdata = (*(pl->p_progname))(xdrbuf); |
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if (outdata == NULL && |
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pl->p_outproc != xdr_void) |
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/* there was an error */ |
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return; |
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if (!svc_sendreply(transp, pl->p_outproc, outdata)) |
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exit(1); |
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/* free the decoded arguments */ |
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(void)svc_freeargs(transp, pl->p_inproc, xdrbuf); |
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return; |
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} |
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exit(1); |
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} |
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