FreeBSD-5.3/usr.sbin/rpcbind/pmap_svc.c
/* $NetBSD: pmap_svc.c,v 1.2 2000/10/20 11:49:40 fvdl Exp $ */
/* $FreeBSD: src/usr.sbin/rpcbind/pmap_svc.c,v 1.4 2002/10/07 02:56:59 alfred Exp $ */
/*
* Sun RPC is a product of Sun Microsystems, Inc. and is provided for
* unrestricted use provided that this legend is included on all tape
* media and as a part of the software program in whole or part. Users
* may copy or modify Sun RPC without charge, but are not authorized
* to license or distribute it to anyone else except as part of a product or
* program developed by the user.
*
* SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
* WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
* PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
*
* Sun RPC is provided with no support and without any obligation on the
* part of Sun Microsystems, Inc. to assist in its use, correction,
* modification or enhancement.
*
* SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
* INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
* OR ANY PART THEREOF.
*
* In no event will Sun Microsystems, Inc. be liable for any lost revenue
* or profits or other special, indirect and consequential damages, even if
* Sun has been advised of the possibility of such damages.
*
* Sun Microsystems, Inc.
* 2550 Garcia Avenue
* Mountain View, California 94043
*/
/*
* Copyright (c) 1984 - 1991 by Sun Microsystems, Inc.
*/
/* #ident "@(#)pmap_svc.c 1.14 93/07/05 SMI" */
#if 0
#ifndef lint
static char sccsid[] = "@(#)pmap_svc.c 1.23 89/04/05 Copyr 1984 Sun Micro";
#endif
#endif
/*
* pmap_svc.c
* The server procedure for the version 2 portmaper.
* All the portmapper related interface from the portmap side.
*/
#ifdef PORTMAP
#include <sys/types.h>
#include <sys/socket.h>
#include <stdio.h>
#include <rpc/rpc.h>
#include <rpc/pmap_prot.h>
#include <rpc/rpcb_prot.h>
#ifdef RPCBIND_DEBUG
#include <stdlib.h>
#endif
#include "rpcbind.h"
static struct pmaplist *find_service_pmap __P((rpcprog_t, rpcvers_t,
rpcprot_t));
static bool_t pmapproc_change __P((struct svc_req *, SVCXPRT *, u_long));
static bool_t pmapproc_getport __P((struct svc_req *, SVCXPRT *));
static bool_t pmapproc_dump __P((struct svc_req *, SVCXPRT *));
/*
* Called for all the version 2 inquiries.
*/
void
pmap_service(struct svc_req *rqstp, SVCXPRT *xprt)
{
rpcbs_procinfo(RPCBVERS_2_STAT, rqstp->rq_proc);
switch (rqstp->rq_proc) {
case PMAPPROC_NULL:
/*
* Null proc call
*/
#ifdef RPCBIND_DEBUG
if (debugging)
fprintf(stderr, "PMAPPROC_NULL\n");
#endif
check_access(xprt, rqstp->rq_proc, NULL, PMAPVERS);
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
if (debugging)
fprintf(stderr, "PMAPPROC_DUMP\n");
#endif
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:
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 struct pmaplist *
find_service_pmap(rpcprog_t prog, rpcvers_t vers, rpcprot_t prot)
{
register struct pmaplist *hit = NULL;
register struct 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);
}
static bool_t
pmapproc_change(struct svc_req *rqstp __unused, SVCXPRT *xprt, unsigned long op)
{
struct pmap reg;
RPCB rpcbreg;
long ans;
struct sockaddr_in *who;
uid_t uid;
char uidbuf[32];
#ifdef RPCBIND_DEBUG
if (debugging)
fprintf(stderr, "%s request for (%lu, %lu) : ",
op == PMAPPROC_SET ? "PMAP_SET" : "PMAP_UNSET",
reg.pm_prog, reg.pm_vers);
#endif
if (!svc_getargs(xprt, (xdrproc_t) xdr_pmap, (char *)®)) {
svcerr_decode(xprt);
return (FALSE);
}
if (!check_access(xprt, op, ®, PMAPVERS)) {
svcerr_weakauth(xprt);
return FALSE;
}
who = svc_getcaller(xprt);
/*
* Can't use getpwnam here. We might end up calling ourselves
* and looping.
*/
if (__rpc_get_local_uid(xprt, &uid) < 0)
rpcbreg.r_owner = "unknown";
else if (uid == 0)
rpcbreg.r_owner = "superuser";
else {
/* r_owner will be strdup-ed later */
snprintf(uidbuf, sizeof uidbuf, "%d", uid);
rpcbreg.r_owner = uidbuf;
}
rpcbreg.r_prog = reg.pm_prog;
rpcbreg.r_vers = reg.pm_vers;
if (op == PMAPPROC_SET) {
char buf[32];
snprintf(buf, sizeof buf, "0.0.0.0.%d.%d",
(int)((reg.pm_port >> 8) & 0xff),
(int)(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:
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
if (debugging)
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(struct svc_req *rqstp __unused, SVCXPRT *xprt)
{
struct pmap reg;
long lport;
int port = 0;
struct pmaplist *fnd;
#ifdef RPCBIND_DEBUG
char *uaddr;
#endif
if (!svc_getargs(xprt, (xdrproc_t) xdr_pmap, (char *)®)) {
svcerr_decode(xprt);
return (FALSE);
}
if (!check_access(xprt, PMAPPROC_GETPORT, ®, PMAPVERS)) {
svcerr_weakauth(xprt);
return FALSE;
}
#ifdef RPCBIND_DEBUG
if (debugging) {
uaddr = taddr2uaddr(rpcbind_get_conf(xprt->xp_netid),
svc_getrpccaller(xprt));
fprintf(stderr, "PMAP_GETPORT req 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;
snprintf(serveuaddr, sizeof 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:
lport = port;
if ((!svc_sendreply(xprt, (xdrproc_t) xdr_long, (caddr_t)&lport)) &&
debugging) {
(void) fprintf(stderr, "portmap: svc_sendreply\n");
if (doabort) {
rpcbind_abort();
}
}
#ifdef RPCBIND_DEBUG
if (debugging)
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(struct svc_req *rqstp __unused, SVCXPRT *xprt)
{
if (!svc_getargs(xprt, (xdrproc_t)xdr_void, NULL)) {
svcerr_decode(xprt);
return (FALSE);
}
if (!check_access(xprt, PMAPPROC_DUMP, NULL, PMAPVERS)) {
svcerr_weakauth(xprt);
return FALSE;
}
if ((!svc_sendreply(xprt, (xdrproc_t) xdr_pmaplist_ptr,
(caddr_t)&list_pml)) && debugging) {
if (debugging)
(void) fprintf(stderr, "portmap: svc_sendreply\n");
if (doabort) {
rpcbind_abort();
}
}
return (TRUE);
}
#endif /* PORTMAP */