8a16b7a18f
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370 lines
9.4 KiB
C
370 lines
9.4 KiB
C
/* $NetBSD: pmap_svc.c,v 1.2 2000/10/20 11:49:40 fvdl Exp $ */
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/* $FreeBSD$ */
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/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 2009, Sun Microsystems, Inc.
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* All rights reserved.
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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 met:
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* - Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* - Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* - Neither the name of Sun Microsystems, 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 "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Copyright (c) 1984 - 1991 by Sun Microsystems, Inc.
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*/
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/* #ident "@(#)pmap_svc.c 1.14 93/07/05 SMI" */
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#if 0
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#ifndef lint
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static char sccsid[] = "@(#)pmap_svc.c 1.23 89/04/05 Copyr 1984 Sun Micro";
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#endif
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#endif
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/*
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* pmap_svc.c
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* The server procedure for the version 2 portmaper.
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* All the portmapper related interface from the portmap side.
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*/
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#ifdef PORTMAP
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <stdio.h>
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#include <rpc/rpc.h>
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#include <rpc/pmap_prot.h>
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#include <rpc/rpcb_prot.h>
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#ifdef RPCBIND_DEBUG
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#include <stdlib.h>
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#endif
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#include "rpcbind.h"
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static struct pmaplist *find_service_pmap(rpcprog_t, rpcvers_t,
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rpcprot_t);
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static bool_t pmapproc_change(struct svc_req *, SVCXPRT *, u_long);
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static bool_t pmapproc_getport(struct svc_req *, SVCXPRT *);
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static bool_t pmapproc_dump(struct svc_req *, SVCXPRT *);
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/*
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* Called for all the version 2 inquiries.
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*/
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void
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pmap_service(struct svc_req *rqstp, SVCXPRT *xprt)
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{
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rpcbs_procinfo(RPCBVERS_2_STAT, rqstp->rq_proc);
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switch (rqstp->rq_proc) {
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case PMAPPROC_NULL:
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/*
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* Null proc call
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*/
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#ifdef RPCBIND_DEBUG
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if (debugging)
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fprintf(stderr, "PMAPPROC_NULL\n");
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#endif
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check_access(xprt, rqstp->rq_proc, NULL, PMAPVERS);
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if ((!svc_sendreply(xprt, (xdrproc_t) xdr_void, NULL)) &&
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debugging) {
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if (doabort) {
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rpcbind_abort();
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}
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}
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break;
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case PMAPPROC_SET:
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/*
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* Set a program, version to port mapping
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*/
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pmapproc_change(rqstp, xprt, rqstp->rq_proc);
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break;
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case PMAPPROC_UNSET:
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/*
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* Remove a program, version to port mapping.
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*/
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pmapproc_change(rqstp, xprt, rqstp->rq_proc);
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break;
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case PMAPPROC_GETPORT:
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/*
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* Lookup the mapping for a program, version and return its
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* port number.
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*/
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pmapproc_getport(rqstp, xprt);
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break;
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case PMAPPROC_DUMP:
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/*
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* Return the current set of mapped program, version
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*/
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#ifdef RPCBIND_DEBUG
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if (debugging)
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fprintf(stderr, "PMAPPROC_DUMP\n");
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#endif
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pmapproc_dump(rqstp, xprt);
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break;
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case PMAPPROC_CALLIT:
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/*
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* Calls a procedure on the local machine. If the requested
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* procedure is not registered this procedure does not return
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* error information!!
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* This procedure is only supported on rpc/udp and calls via
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* rpc/udp. It passes null authentication parameters.
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*/
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rpcbproc_callit_com(rqstp, xprt, PMAPPROC_CALLIT, PMAPVERS);
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break;
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default:
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svcerr_noproc(xprt);
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break;
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}
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}
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/*
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* returns the item with the given program, version number. If that version
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* number is not found, it returns the item with that program number, so that
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* the port number is now returned to the caller. The caller when makes a
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* call to this program, version number, the call will fail and it will
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* return with PROGVERS_MISMATCH. The user can then determine the highest
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* and the lowest version number for this program using clnt_geterr() and
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* use those program version numbers.
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*/
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static struct pmaplist *
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find_service_pmap(rpcprog_t prog, rpcvers_t vers, rpcprot_t prot)
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{
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register struct pmaplist *hit = NULL;
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register struct pmaplist *pml;
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for (pml = list_pml; pml != NULL; pml = pml->pml_next) {
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if ((pml->pml_map.pm_prog != prog) ||
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(pml->pml_map.pm_prot != prot))
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continue;
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hit = pml;
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if (pml->pml_map.pm_vers == vers)
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break;
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}
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return (hit);
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}
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static bool_t
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pmapproc_change(struct svc_req *rqstp __unused, SVCXPRT *xprt, unsigned long op)
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{
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struct pmap reg;
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RPCB rpcbreg;
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long ans;
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struct sockaddr_in *who;
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uid_t uid;
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char uidbuf[32];
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#ifdef RPCBIND_DEBUG
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if (debugging)
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fprintf(stderr, "%s request for (%lu, %lu) : ",
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op == PMAPPROC_SET ? "PMAP_SET" : "PMAP_UNSET",
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reg.pm_prog, reg.pm_vers);
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#endif
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if (!svc_getargs(xprt, (xdrproc_t) xdr_pmap, (char *)®)) {
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svcerr_decode(xprt);
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return (FALSE);
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}
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if (!check_access(xprt, op, ®, PMAPVERS)) {
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svcerr_weakauth(xprt);
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return FALSE;
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}
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who = svc_getcaller(xprt);
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/*
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* Can't use getpwnam here. We might end up calling ourselves
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* and looping.
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*/
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if (__rpc_get_local_uid(xprt, &uid) < 0)
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rpcbreg.r_owner = "unknown";
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else if (uid == 0)
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rpcbreg.r_owner = "superuser";
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else {
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/* r_owner will be strdup-ed later */
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snprintf(uidbuf, sizeof uidbuf, "%d", uid);
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rpcbreg.r_owner = uidbuf;
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}
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rpcbreg.r_prog = reg.pm_prog;
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rpcbreg.r_vers = reg.pm_vers;
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if (op == PMAPPROC_SET) {
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char buf[32];
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snprintf(buf, sizeof buf, "0.0.0.0.%d.%d",
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(int)((reg.pm_port >> 8) & 0xff),
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(int)(reg.pm_port & 0xff));
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rpcbreg.r_addr = buf;
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if (reg.pm_prot == IPPROTO_UDP) {
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rpcbreg.r_netid = udptrans;
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} else if (reg.pm_prot == IPPROTO_TCP) {
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rpcbreg.r_netid = tcptrans;
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} else {
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ans = FALSE;
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goto done_change;
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}
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ans = map_set(&rpcbreg, rpcbreg.r_owner);
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} else if (op == PMAPPROC_UNSET) {
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bool_t ans1, ans2;
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rpcbreg.r_addr = NULL;
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rpcbreg.r_netid = tcptrans;
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ans1 = map_unset(&rpcbreg, rpcbreg.r_owner);
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rpcbreg.r_netid = udptrans;
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ans2 = map_unset(&rpcbreg, rpcbreg.r_owner);
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ans = ans1 || ans2;
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} else {
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ans = FALSE;
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}
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done_change:
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if ((!svc_sendreply(xprt, (xdrproc_t) xdr_long, (caddr_t) &ans)) &&
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debugging) {
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fprintf(stderr, "portmap: svc_sendreply\n");
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if (doabort) {
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rpcbind_abort();
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}
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}
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#ifdef RPCBIND_DEBUG
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if (debugging)
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fprintf(stderr, "%s\n", ans == TRUE ? "succeeded" : "failed");
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#endif
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if (op == PMAPPROC_SET)
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rpcbs_set(RPCBVERS_2_STAT, ans);
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else
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rpcbs_unset(RPCBVERS_2_STAT, ans);
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return (TRUE);
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}
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/* ARGSUSED */
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static bool_t
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pmapproc_getport(struct svc_req *rqstp __unused, SVCXPRT *xprt)
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{
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struct pmap reg;
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long lport;
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int port = 0;
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struct pmaplist *fnd;
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#ifdef RPCBIND_DEBUG
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char *uaddr;
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#endif
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if (!svc_getargs(xprt, (xdrproc_t) xdr_pmap, (char *)®)) {
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svcerr_decode(xprt);
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return (FALSE);
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}
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if (!check_access(xprt, PMAPPROC_GETPORT, ®, PMAPVERS)) {
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svcerr_weakauth(xprt);
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return FALSE;
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}
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#ifdef RPCBIND_DEBUG
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if (debugging) {
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uaddr = taddr2uaddr(rpcbind_get_conf(xprt->xp_netid),
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svc_getrpccaller(xprt));
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fprintf(stderr, "PMAP_GETPORT req for (%lu, %lu, %s) from %s :",
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reg.pm_prog, reg.pm_vers,
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reg.pm_prot == IPPROTO_UDP ? "udp" : "tcp", uaddr);
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free(uaddr);
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}
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#endif
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fnd = find_service_pmap(reg.pm_prog, reg.pm_vers, reg.pm_prot);
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if (fnd) {
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char serveuaddr[32], *ua;
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int h1, h2, h3, h4, p1, p2;
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char *netid;
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if (reg.pm_prot == IPPROTO_UDP) {
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ua = udp_uaddr;
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netid = udptrans;
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} else {
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ua = tcp_uaddr; /* To get the len */
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netid = tcptrans;
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}
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if (ua == NULL) {
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goto sendreply;
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}
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if (sscanf(ua, "%d.%d.%d.%d.%d.%d", &h1, &h2, &h3,
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&h4, &p1, &p2) == 6) {
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p1 = (fnd->pml_map.pm_port >> 8) & 0xff;
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p2 = (fnd->pml_map.pm_port) & 0xff;
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snprintf(serveuaddr, sizeof serveuaddr,
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"%d.%d.%d.%d.%d.%d", h1, h2, h3, h4, p1, p2);
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if (is_bound(netid, serveuaddr)) {
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port = fnd->pml_map.pm_port;
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} else { /* this service is dead; delete it */
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delete_prog(reg.pm_prog);
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}
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}
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}
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sendreply:
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lport = port;
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if ((!svc_sendreply(xprt, (xdrproc_t) xdr_long, (caddr_t)&lport)) &&
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debugging) {
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(void) fprintf(stderr, "portmap: svc_sendreply\n");
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if (doabort) {
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rpcbind_abort();
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}
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}
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#ifdef RPCBIND_DEBUG
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if (debugging)
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fprintf(stderr, "port = %d\n", port);
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#endif
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rpcbs_getaddr(RPCBVERS_2_STAT, reg.pm_prog, reg.pm_vers,
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reg.pm_prot == IPPROTO_UDP ? udptrans : tcptrans,
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port ? udptrans : "");
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return (TRUE);
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}
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/* ARGSUSED */
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static bool_t
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pmapproc_dump(struct svc_req *rqstp __unused, SVCXPRT *xprt)
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{
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if (!svc_getargs(xprt, (xdrproc_t)xdr_void, NULL)) {
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svcerr_decode(xprt);
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return (FALSE);
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}
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if (!check_access(xprt, PMAPPROC_DUMP, NULL, PMAPVERS)) {
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svcerr_weakauth(xprt);
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return FALSE;
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}
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if ((!svc_sendreply(xprt, (xdrproc_t) xdr_pmaplist_ptr,
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(caddr_t)&list_pml)) && debugging) {
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if (debugging)
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(void) fprintf(stderr, "portmap: svc_sendreply\n");
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if (doabort) {
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rpcbind_abort();
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}
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}
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return (TRUE);
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}
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#endif /* PORTMAP */
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