OpenSolaris_b135/cmd/rpcbind/pmap_svc.c
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2004 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */
/* All Rights Reserved */
/*
* University Copyright- Copyright (c) 1982, 1986, 1988
* The Regents of the University of California
* All Rights Reserved
*
* University Acknowledgment- Portions of this document are derived from
* software developed by the University of California, Berkeley, and its
* contributors.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
/*
* pmap_svc.c
* The server procedure for the version 2 portmaper.
* All the portmapper related interface from the portmap side.
*/
#ifdef PORTMAP
#include <stdio.h>
#include <alloca.h>
#include <ucred.h>
#include <rpc/rpc.h>
#include <rpc/pmap_prot.h>
#include <rpc/rpcb_prot.h>
#include "rpcbind.h"
#ifdef RPCBIND_DEBUG
#include <netdir.h>
#endif
static PMAPLIST *find_service_pmap();
static bool_t pmapproc_change();
static bool_t pmapproc_getport();
static bool_t pmapproc_dump();
/*
* Called for all the version 2 inquiries.
*/
void
pmap_service(rqstp, xprt)
register struct svc_req *rqstp;
register SVCXPRT *xprt;
{
rpcbs_procinfo(RPCBVERS_2_STAT, rqstp->rq_proc);
switch (rqstp->rq_proc) {
case PMAPPROC_NULL:
/*
* Null proc call
*/
#ifdef RPCBIND_DEBUG
fprintf(stderr, "PMAPPROC_NULL\n");
#endif
PMAP_CHECK(xprt, rqstp->rq_proc);
if ((!svc_sendreply(xprt, (xdrproc_t)xdr_void, NULL)) &&
debugging) {
if (doabort) {
rpcbind_abort();
}
}
break;
case PMAPPROC_SET:
/*
* Set a program, version to port mapping
*/
pmapproc_change(rqstp, xprt, rqstp->rq_proc);
break;
case PMAPPROC_UNSET:
/*
* Remove a program, version to port mapping.
*/
pmapproc_change(rqstp, xprt, rqstp->rq_proc);
break;
case PMAPPROC_GETPORT:
/*
* Lookup the mapping for a program, version and return its
* port number.
*/
pmapproc_getport(rqstp, xprt);
break;
case PMAPPROC_DUMP:
/*
* Return the current set of mapped program, version
*/
#ifdef RPCBIND_DEBUG
fprintf(stderr, "PMAPPROC_DUMP\n");
#endif
PMAP_CHECK(xprt, rqstp->rq_proc);
pmapproc_dump(rqstp, xprt);
break;
case PMAPPROC_CALLIT:
/*
* Calls a procedure on the local machine. If the requested
* procedure is not registered this procedure does not return
* error information!!
* This procedure is only supported on rpc/udp and calls via
* rpc/udp. It passes null authentication parameters.
*/
rpcbproc_callit_com(rqstp, xprt, PMAPPROC_CALLIT, PMAPVERS);
break;
default:
PMAP_CHECK(xprt, rqstp->rq_proc);
svcerr_noproc(xprt);
break;
}
}
/*
* returns the item with the given program, version number. If that version
* number is not found, it returns the item with that program number, so that
* the port number is now returned to the caller. The caller when makes a
* call to this program, version number, the call will fail and it will
* return with PROGVERS_MISMATCH. The user can then determine the highest
* and the lowest version number for this program using clnt_geterr() and
* use those program version numbers.
*/
static PMAPLIST *
find_service_pmap(prog, vers, prot)
ulong_t prog;
ulong_t vers;
ulong_t prot;
{
register PMAPLIST *hit = NULL;
register PMAPLIST *pml;
for (pml = list_pml; pml != NULL; pml = pml->pml_next) {
if ((pml->pml_map.pm_prog != prog) ||
(pml->pml_map.pm_prot != prot))
continue;
hit = pml;
if (pml->pml_map.pm_vers == vers)
break;
}
return (hit);
}
extern char *getowner(SVCXPRT *xprt, char *);
/*ARGSUSED*/
static bool_t
pmapproc_change(rqstp, xprt, op)
struct svc_req *rqstp;
register SVCXPRT *xprt;
unsigned long op;
{
PMAP reg;
RPCB rpcbreg;
int ans;
struct sockaddr_in *who;
extern bool_t map_set(), map_unset();
char owner[64];
if (!svc_getargs(xprt, (xdrproc_t)xdr_pmap, (char *)®)) {
svcerr_decode(xprt);
return (FALSE);
}
who = svc_getcaller(xprt);
#ifdef RPCBIND_DEBUG
fprintf(stderr, "%s request for (%lu, %lu) : ",
op == PMAPPROC_SET ? "PMAP_SET" : "PMAP_UNSET",
reg.pm_prog, reg.pm_vers);
#endif
/* Don't allow unset/set from remote. */
if (!localxprt(xprt, B_TRUE)) {
ans = FALSE;
goto done_change;
}
rpcbreg.r_owner = getowner(xprt, owner);
if ((op == PMAPPROC_SET) && (reg.pm_port < IPPORT_RESERVED) &&
(ntohs(who->sin_port) >= IPPORT_RESERVED)) {
ans = FALSE;
goto done_change;
}
rpcbreg.r_prog = reg.pm_prog;
rpcbreg.r_vers = reg.pm_vers;
if (op == PMAPPROC_SET) {
char buf[32];
sprintf(buf, "0.0.0.0.%d.%d", (reg.pm_port >> 8) & 0xff,
reg.pm_port & 0xff);
rpcbreg.r_addr = buf;
if (reg.pm_prot == IPPROTO_UDP) {
rpcbreg.r_netid = udptrans;
} else if (reg.pm_prot == IPPROTO_TCP) {
rpcbreg.r_netid = tcptrans;
} else {
ans = FALSE;
goto done_change;
}
ans = map_set(&rpcbreg, rpcbreg.r_owner);
} else if (op == PMAPPROC_UNSET) {
bool_t ans1, ans2;
rpcbreg.r_addr = NULL;
rpcbreg.r_netid = tcptrans;
ans1 = map_unset(&rpcbreg, rpcbreg.r_owner);
rpcbreg.r_netid = udptrans;
ans2 = map_unset(&rpcbreg, rpcbreg.r_owner);
ans = ans1 || ans2;
} else {
ans = FALSE;
}
done_change:
PMAP_LOG(ans, xprt, op, reg.pm_prog);
if ((!svc_sendreply(xprt, (xdrproc_t)xdr_long, (caddr_t)&ans)) &&
debugging) {
fprintf(stderr, "portmap: svc_sendreply\n");
if (doabort) {
rpcbind_abort();
}
}
#ifdef RPCBIND_DEBUG
fprintf(stderr, "%s\n", ans == TRUE ? "succeeded" : "failed");
#endif
if (op == PMAPPROC_SET)
rpcbs_set(RPCBVERS_2_STAT, ans);
else
rpcbs_unset(RPCBVERS_2_STAT, ans);
return (TRUE);
}
/* ARGSUSED */
static bool_t
pmapproc_getport(rqstp, xprt)
struct svc_req *rqstp;
register SVCXPRT *xprt;
{
PMAP reg;
int port = 0;
PMAPLIST *fnd;
#ifdef RPCBIND_DEBUG
char *uaddr;
#endif
if (!svc_getargs(xprt, (xdrproc_t)xdr_pmap, (char *)®)) {
svcerr_decode(xprt);
return (FALSE);
}
PMAP_CHECK_RET(xprt, rqstp->rq_proc, FALSE);
#ifdef RPCBIND_DEBUG
uaddr = taddr2uaddr(rpcbind_get_conf(xprt->xp_netid),
svc_getrpccaller(xprt));
fprintf(stderr, "PMAP_GETPORT request for (%lu, %lu, %s) from %s :",
reg.pm_prog, reg.pm_vers,
reg.pm_prot == IPPROTO_UDP ? "udp" : "tcp", uaddr);
free(uaddr);
#endif
fnd = find_service_pmap(reg.pm_prog, reg.pm_vers, reg.pm_prot);
if (fnd) {
char serveuaddr[32], *ua;
int h1, h2, h3, h4, p1, p2;
char *netid;
if (reg.pm_prot == IPPROTO_UDP) {
ua = udp_uaddr;
netid = udptrans;
} else {
ua = tcp_uaddr; /* To get the len */
netid = tcptrans;
}
if (ua == NULL) {
goto sendreply;
}
if (sscanf(ua, "%d.%d.%d.%d.%d.%d", &h1, &h2, &h3,
&h4, &p1, &p2) == 6) {
p1 = (fnd->pml_map.pm_port >> 8) & 0xff;
p2 = (fnd->pml_map.pm_port) & 0xff;
sprintf(serveuaddr, "%d.%d.%d.%d.%d.%d",
h1, h2, h3, h4, p1, p2);
if (is_bound(netid, serveuaddr)) {
port = fnd->pml_map.pm_port;
} else { /* this service is dead; delete it */
delete_prog(reg.pm_prog);
}
}
}
sendreply:
if ((!svc_sendreply(xprt, (xdrproc_t)xdr_long, (caddr_t)&port)) &&
debugging) {
(void) fprintf(stderr, "portmap: svc_sendreply\n");
if (doabort) {
rpcbind_abort();
}
}
#ifdef RPCBIND_DEBUG
fprintf(stderr, "port = %d\n", port);
#endif
rpcbs_getaddr(RPCBVERS_2_STAT, reg.pm_prog, reg.pm_vers,
reg.pm_prot == IPPROTO_UDP ? udptrans : tcptrans,
port ? udptrans : "");
return (TRUE);
}
/* ARGSUSED */
static bool_t
pmapproc_dump(rqstp, xprt)
struct svc_req *rqstp;
register SVCXPRT *xprt;
{
if (!svc_getargs(xprt, (xdrproc_t)xdr_void, NULL)) {
svcerr_decode(xprt);
return (FALSE);
}
if ((!svc_sendreply(xprt, (xdrproc_t)xdr_pmaplist_ptr,
(caddr_t)&list_pml)) && debugging) {
(void) fprintf(stderr, "portmap: svc_sendreply\n");
if (doabort) {
rpcbind_abort();
}
}
return (TRUE);
}
/*
* Is the transport local? The original rpcbind code tried to
* figure out all the network interfaces but there can be a nearly
* infinite number of network interfaces. And the number of interfaces can
* vary over time.
*
* Note that when we get here, we've already establised that we're
* dealing with a TCP/IP endpoint.
*/
boolean_t
localxprt(SVCXPRT *transp, boolean_t forceipv4)
{
struct sockaddr_gen *sgen = svc_getgencaller(transp);
switch (SGFAM(sgen)) {
case AF_INET:
break;
case AF_INET6:
if (forceipv4)
return (B_FALSE);
break;
default:
return (B_FALSE);
}
/*
* Get the peer's uid; if it is known it is sufficiently
* authenticated and considered local. The magic behind this
* call is all in libnsl.
*/
return (rpcb_caller_uid(transp) != -1);
}
#endif /* PORTMAP */