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freebsd-skq/usr.sbin/rpcbind/rpcb_svc_4.c
Alfred Perlstein 8360efbd6c Bring in a hybrid of SunSoft's transport-independent RPC (TI-RPC) and 
associated changes that had to happen to make this possible as well as
bugs fixed along the way.

  Bring in required TLI library routines to support this.

  Since we don't support TLI we've essentially copied what NetBSD
  has done, adding a thin layer to emulate direct the TLI calls
  into BSD socket calls.

  This is mostly from Sun's tirpc release that was made in 1994,
  however some fixes were backported from the 1999 release (supposedly
  only made available after this porting effort was underway).

  The submitter has agreed to continue on and bring us up to the
  1999 release.

  Several key features are introduced with this update:
    Client calls are thread safe. (1999 code has server side thread
    safe)
    Updated, a more modern interface.

  Many userland updates were done to bring the code up to par with
  the recent RPC API.

  There is an update to the pthreads library, a function
  pthread_main_np() was added to emulate a function of Sun's threads
  library.

  While we're at it, bring in NetBSD's lockd, it's been far too
  long of a wait.

  New rpcbind(8) replaces portmap(8) (supporting communication over
  an authenticated Unix-domain socket, and by default only allowing
  set and unset requests over that channel). It's much more secure
  than the old portmapper.

  Umount(8), mountd(8), mount_nfs(8), nfsd(8) have also been upgraded
  to support TI-RPC and to support IPV6.

  Umount(8) is also fixed to unmount pathnames longer than 80 chars,
  which are currently truncated by the Kernel statfs structure.

Submitted by: Martin Blapp <mb@imp.ch>
Manpage review: ru
Secure RPC implemented by: wpaul
2001-03-19 12:50:13 +00:00

455 lines
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/*
* $NetBSD: rpcb_svc_4.c,v 1.1 2000/06/02 23:15:41 fvdl Exp $
* $FreeBSD$
*/
/*
* 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) 1986 - 1991 by Sun Microsystems, Inc.
*/
/* #ident "@(#)rpcb_svc_4.c 1.8 93/07/05 SMI" */
/*
* rpcb_svc_4.c
* The server procedure for the version 4 rpcbind.
*
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <rpc/rpc.h>
#include <stdio.h>
#include <unistd.h>
#include <netconfig.h>
#include <syslog.h>
#include <string.h>
#include <stdlib.h>
#include "rpcbind.h"
static void *rpcbproc_getaddr_4_local __P((void *, struct svc_req *, SVCXPRT *,
rpcvers_t));
static void *rpcbproc_getversaddr_4_local __P((void *, struct svc_req *, SVCXPRT *, rpcvers_t));
static void *rpcbproc_getaddrlist_4_local
__P((void *, struct svc_req *, SVCXPRT *, rpcvers_t));
static void free_rpcb_entry_list __P((rpcb_entry_list_ptr *));
static void *rpcbproc_dump_4_local __P((void *, struct svc_req *, SVCXPRT *, rpcvers_t));
/*
* Called by svc_getreqset. There is a separate server handle for
* every transport that it waits on.
*/
void
rpcb_service_4(struct svc_req *rqstp, SVCXPRT *transp)
{
union {
rpcb rpcbproc_set_4_arg;
rpcb rpcbproc_unset_4_arg;
rpcb rpcbproc_getaddr_4_local_arg;
char *rpcbproc_uaddr2taddr_4_arg;
struct netbuf rpcbproc_taddr2uaddr_4_arg;
} argument;
char *result;
xdrproc_t xdr_argument, xdr_result;
void *(*local) __P((void *, struct svc_req *, SVCXPRT *, rpcvers_t));
rpcbs_procinfo(RPCBVERS_4_STAT, rqstp->rq_proc);
switch (rqstp->rq_proc) {
case NULLPROC:
/*
* Null proc call
*/
#ifdef RPCBIND_DEBUG
if (debugging)
fprintf(stderr, "RPCBPROC_NULL\n");
#endif
check_access(transp, rqstp->rq_proc, NULL, RPCBVERS4);
(void) svc_sendreply(transp, (xdrproc_t) xdr_void,
(char *)NULL);
return;
case RPCBPROC_SET:
/*
* Check to see whether the message came from
* loopback transports (for security reasons)
*/
xdr_argument = (xdrproc_t)xdr_rpcb;
xdr_result = (xdrproc_t)xdr_bool;
local = rpcbproc_set_com;
break;
case RPCBPROC_UNSET:
/*
* Check to see whether the message came from
* loopback transports (for security reasons)
*/
xdr_argument = (xdrproc_t)xdr_rpcb;
xdr_result = (xdrproc_t)xdr_bool;
local = rpcbproc_unset_com;
break;
case RPCBPROC_GETADDR:
xdr_argument = (xdrproc_t)xdr_rpcb;
xdr_result = (xdrproc_t)xdr_wrapstring;
local = rpcbproc_getaddr_4_local;
break;
case RPCBPROC_GETVERSADDR:
#ifdef RPCBIND_DEBUG
if (debugging)
fprintf(stderr, "RPCBPROC_GETVERSADDR\n");
#endif
xdr_argument = (xdrproc_t)xdr_rpcb;
xdr_result = (xdrproc_t)xdr_wrapstring;
local = rpcbproc_getversaddr_4_local;
break;
case RPCBPROC_DUMP:
#ifdef RPCBIND_DEBUG
if (debugging)
fprintf(stderr, "RPCBPROC_DUMP\n");
#endif
xdr_argument = (xdrproc_t)xdr_void;
xdr_result = (xdrproc_t)xdr_rpcblist_ptr;
local = rpcbproc_dump_4_local;
break;
case RPCBPROC_INDIRECT:
#ifdef RPCBIND_DEBUG
if (debugging)
fprintf(stderr, "RPCBPROC_INDIRECT\n");
#endif
rpcbproc_callit_com(rqstp, transp, rqstp->rq_proc, RPCBVERS4);
return;
/* case RPCBPROC_CALLIT: */
case RPCBPROC_BCAST:
#ifdef RPCBIND_DEBUG
if (debugging)
fprintf(stderr, "RPCBPROC_BCAST\n");
#endif
rpcbproc_callit_com(rqstp, transp, rqstp->rq_proc, RPCBVERS4);
return;
case RPCBPROC_GETTIME:
#ifdef RPCBIND_DEBUG
if (debugging)
fprintf(stderr, "RPCBPROC_GETTIME\n");
#endif
xdr_argument = (xdrproc_t)xdr_void;
xdr_result = (xdrproc_t)xdr_u_long;
local = rpcbproc_gettime_com;
break;
case RPCBPROC_UADDR2TADDR:
#ifdef RPCBIND_DEBUG
if (debugging)
fprintf(stderr, "RPCBPROC_UADDR2TADDR\n");
#endif
xdr_argument = (xdrproc_t)xdr_wrapstring;
xdr_result = (xdrproc_t)xdr_netbuf;
local = rpcbproc_uaddr2taddr_com;
break;
case RPCBPROC_TADDR2UADDR:
#ifdef RPCBIND_DEBUG
if (debugging)
fprintf(stderr, "RPCBPROC_TADDR2UADDR\n");
#endif
xdr_argument = (xdrproc_t)xdr_netbuf;
xdr_result = (xdrproc_t)xdr_wrapstring;
local = rpcbproc_taddr2uaddr_com;
break;
case RPCBPROC_GETADDRLIST:
#ifdef RPCBIND_DEBUG
if (debugging)
fprintf(stderr, "RPCBPROC_GETADDRLIST\n");
#endif
xdr_argument = (xdrproc_t)xdr_rpcb;
xdr_result = (xdrproc_t)xdr_rpcb_entry_list_ptr;
local = rpcbproc_getaddrlist_4_local;
break;
case RPCBPROC_GETSTAT:
#ifdef RPCBIND_DEBUG
if (debugging)
fprintf(stderr, "RPCBPROC_GETSTAT\n");
#endif
xdr_argument = (xdrproc_t)xdr_void;
xdr_result = (xdrproc_t)xdr_rpcb_stat_byvers;
local = rpcbproc_getstat;
break;
default:
svcerr_noproc(transp);
return;
}
memset((char *)&argument, 0, sizeof (argument));
if (!svc_getargs(transp, (xdrproc_t) xdr_argument,
(char *)&argument)) {
svcerr_decode(transp);
if (debugging)
(void) fprintf(stderr, "rpcbind: could not decode\n");
return;
}
if (!check_access(transp, rqstp->rq_proc, &argument, RPCBVERS4)) {
svcerr_weakauth(transp);
goto done;
}
result = (*local)(&argument, rqstp, transp, RPCBVERS4);
if (result != NULL && !svc_sendreply(transp, (xdrproc_t) xdr_result,
result)) {
svcerr_systemerr(transp);
if (debugging) {
(void) fprintf(stderr, "rpcbind: svc_sendreply\n");
if (doabort) {
rpcbind_abort();
}
}
}
done:
if (!svc_freeargs(transp, (xdrproc_t) xdr_argument,
(char *)&argument)) {
if (debugging) {
(void) fprintf(stderr, "unable to free arguments\n");
if (doabort) {
rpcbind_abort();
}
}
}
return;
}
/*
* Lookup the mapping for a program, version and return its
* address. Assuming that the caller wants the address of the
* server running on the transport on which the request came.
* Even if a service with a different version number is available,
* it will return that address. The client should check with an
* clnt_call to verify whether the service is the one that is desired.
* We also try to resolve the universal address in terms of
* address of the caller.
*/
/* ARGSUSED */
static void *
rpcbproc_getaddr_4_local(void *arg, struct svc_req *rqstp, SVCXPRT *transp,
rpcvers_t rpcbversnum)
{
RPCB *regp = (RPCB *)arg;
#ifdef RPCBIND_DEBUG
if (debugging) {
char *uaddr;
uaddr = taddr2uaddr(rpcbind_get_conf(transp->xp_netid),
svc_getrpccaller(transp));
fprintf(stderr, "RPCB_GETADDR req for (%lu, %lu, %s) from %s: ",
(unsigned long)regp->r_prog, (unsigned long)regp->r_vers,
regp->r_netid, uaddr);
free(uaddr);
}
#endif
return (rpcbproc_getaddr_com(regp, rqstp, transp, RPCBVERS4,
RPCB_ALLVERS));
}
/*
* Lookup the mapping for a program, version and return its
* address. Assuming that the caller wants the address of the
* server running on the transport on which the request came.
*
* We also try to resolve the universal address in terms of
* address of the caller.
*/
/* ARGSUSED */
static void *
rpcbproc_getversaddr_4_local(void *arg, struct svc_req *rqstp, SVCXPRT *transp,
rpcvers_t versnum)
{
RPCB *regp = (RPCB *)arg;
#ifdef RPCBIND_DEBUG
if (debugging) {
char *uaddr;
uaddr = taddr2uaddr(rpcbind_get_conf(transp->xp_netid),
svc_getrpccaller(transp));
fprintf(stderr, "RPCB_GETVERSADDR rqst for (%lu, %lu, %s)"
" from %s : ",
(unsigned long)regp->r_prog, (unsigned long)regp->r_vers,
regp->r_netid, uaddr);
free(uaddr);
}
#endif
return (rpcbproc_getaddr_com(regp, rqstp, transp, RPCBVERS4,
RPCB_ONEVERS));
}
/*
* Lookup the mapping for a program, version and return the
* addresses for all transports in the current transport family.
* We return a merged address.
*/
/* ARGSUSED */
static void *
rpcbproc_getaddrlist_4_local(void *arg, struct svc_req *rqstp, SVCXPRT *transp,
rpcvers_t versnum)
{
RPCB *regp = (RPCB *)arg;
static rpcb_entry_list_ptr rlist;
register rpcblist_ptr rbl;
rpcb_entry_list_ptr rp, tail;
rpcprog_t prog;
rpcvers_t vers;
rpcb_entry *a;
struct netconfig *nconf;
struct netconfig *reg_nconf;
char *saddr, *maddr = NULL;
free_rpcb_entry_list(&rlist);
prog = regp->r_prog;
vers = regp->r_vers;
reg_nconf = rpcbind_get_conf(transp->xp_netid);
if (reg_nconf == NULL)
return (NULL);
if (*(regp->r_addr) != '\0') {
saddr = regp->r_addr;
} else {
saddr = NULL;
}
#ifdef RPCBIND_DEBUG
if (debugging) {
fprintf(stderr, "r_addr: %s r_netid: %s nc_protofmly: %s\n",
regp->r_addr, regp->r_netid, reg_nconf->nc_protofmly);
}
#endif
for (rbl = list_rbl; rbl != NULL; rbl = rbl->rpcb_next) {
if ((rbl->rpcb_map.r_prog == prog) &&
(rbl->rpcb_map.r_vers == vers)) {
nconf = rpcbind_get_conf(rbl->rpcb_map.r_netid);
if (nconf == NULL)
goto fail;
if (strcmp(nconf->nc_protofmly, reg_nconf->nc_protofmly)
!= 0) {
continue; /* not same proto family */
}
#ifdef RPCBIND_DEBUG
if (debugging)
fprintf(stderr, "\tmerge with: %s", rbl->rpcb_map.r_addr);
#endif
if ((maddr = mergeaddr(transp, rbl->rpcb_map.r_netid,
rbl->rpcb_map.r_addr, saddr)) == NULL) {
#ifdef RPCBIND_DEBUG
if (debugging)
fprintf(stderr, " FAILED\n");
#endif
continue;
} else if (!maddr[0]) {
#ifdef RPCBIND_DEBUG
if (debugging)
fprintf(stderr, " SUCCEEDED, but port died - maddr: nullstring\n");
#endif
/* The server died. Unset this combination */
delete_prog(regp->r_prog);
continue;
}
#ifdef RPCBIND_DEBUG
if (debugging)
fprintf(stderr, " SUCCEEDED maddr: %s\n", maddr);
#endif
/*
* Add it to rlist.
*/
rp = (rpcb_entry_list_ptr)
malloc((u_int)sizeof (rpcb_entry_list));
if (rp == NULL)
goto fail;
a = &rp->rpcb_entry_map;
a->r_maddr = maddr;
a->r_nc_netid = nconf->nc_netid;
a->r_nc_semantics = nconf->nc_semantics;
a->r_nc_protofmly = nconf->nc_protofmly;
a->r_nc_proto = nconf->nc_proto;
rp->rpcb_entry_next = NULL;
if (rlist == NULL) {
rlist = rp;
tail = rp;
} else {
tail->rpcb_entry_next = rp;
tail = rp;
}
rp = NULL;
}
}
#ifdef RPCBIND_DEBUG
if (debugging) {
for (rp = rlist; rp; rp = rp->rpcb_entry_next) {
fprintf(stderr, "\t%s %s\n", rp->rpcb_entry_map.r_maddr,
rp->rpcb_entry_map.r_nc_proto);
}
}
#endif
/*
* XXX: getaddrlist info is also being stuffed into getaddr.
* Perhaps wrong, but better than it not getting counted at all.
*/
rpcbs_getaddr(RPCBVERS4 - 2, prog, vers, transp->xp_netid, maddr);
return (void *)&rlist;
fail: free_rpcb_entry_list(&rlist);
return (NULL);
}
/*
* Free only the allocated structure, rest is all a pointer to some
* other data somewhere else.
*/
static void
free_rpcb_entry_list(rpcb_entry_list_ptr *rlistp)
{
register rpcb_entry_list_ptr rbl, tmp;
for (rbl = *rlistp; rbl != NULL; ) {
tmp = rbl;
rbl = rbl->rpcb_entry_next;
free((char *)tmp->rpcb_entry_map.r_maddr);
free((char *)tmp);
}
*rlistp = NULL;
}
/* ARGSUSED */
static void *
rpcbproc_dump_4_local(void *arg, struct svc_req *req, SVCXPRT *xprt,
rpcvers_t versnum)
{
return ((void *)&list_rbl);
}
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