usr/src/cmd/rpcbind/rpcb_svc.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License, Version 1.0 only
   6  * (the "License").  You may not use this file except in compliance
   7  * with the License.
   8  *
   9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10  * or http://www.opensolaris.org/os/licensing.
  11  * See the License for the specific language governing permissions
  12  * and limitations under the License.
  13  *
  14  * When distributing Covered Code, include this CDDL HEADER in each
  15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16  * If applicable, add the following below this CDDL HEADER, with the
  17  * fields enclosed by brackets "[]" replaced with your own identifying
  18  * information: Portions Copyright [yyyy] [name of copyright owner]
  19  *
  20  * CDDL HEADER END
  21  */
  22 /*
  23  * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26 /*
  27  * Copyright 2013 Nexenta Systems, Inc.  All rights reserved.
  28  */
  29 /* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */
  30 /* All Rights Reserved */
  31 /*
  32  * University Copyright- Copyright (c) 1982, 1986, 1988
  33  * The Regents of the University of California
  34  * All Rights Reserved
  35  *
  36  * University Acknowledgment- Portions of this document are derived from
  37  * software developed by the University of California, Berkeley, and its
  38  * contributors.
  39  */
  40
  41 /*
  42  * rpcb_svc.c
  43  * The server procedure for the version 3 rpcbind (TLI).
  44  *
  45  * It maintains a separate list of all the registered services with the
  46  * version 3 of rpcbind.
  47  */
  48 #include <stdio.h>
  49 #include <strings.h>
  50 #include <sys/types.h>
  51 #include <rpc/rpc.h>
  52 #include <rpc/rpcb_prot.h>
  53 #include <netconfig.h>
  54 #include <syslog.h>
  55 #include <netdir.h>
  56 #include <stdlib.h>
  57 #include "rpcbind.h"
  58
  59 /*
  60  * Called by svc_getreqset. There is a separate server handle for
  61  * every transport that it waits on.
  62  */
  63 void
  64 rpcb_service_3(struct svc_req *rqstp, SVCXPRT *transp)
  65 {
  66         union {
  67                 rpcb rpcbproc_set_3_arg;
  68                 rpcb rpcbproc_unset_3_arg;
  69                 rpcb rpcbproc_getaddr_3_arg;
  70                 rpcb_rmtcallargs rpcbproc_callit_3_arg;
  71                 char *rpcbproc_uaddr2taddr_3_arg;
  72                 struct netbuf rpcbproc_taddr2uaddr_3_arg;
  73         } argument;
  74         union {
  75                 bool_t rpcbproc_set_3_res;
  76                 bool_t rpcbproc_unset_3_res;
  77                 char *rpcbproc_getaddr_3_res;
  78                 rpcblist_ptr *rpcbproc_dump_3_res;
  79                 ulong_t rpcbproc_gettime_3_res;
  80                 struct netbuf rpcbproc_uaddr2taddr_3_res;
  81                 char *rpcbproc_taddr2uaddr_3_res;
  82         } result;
  83         bool_t retval;
  84         xdrproc_t xdr_argument, xdr_result;
  85         bool_t (*local)();
  86
  87         rpcbs_procinfo(RPCBVERS_3_STAT, rqstp->rq_proc);
  88
  89         RPCB_CHECK(transp, rqstp->rq_proc);
  90
  91         switch (rqstp->rq_proc) {
  92         case NULLPROC:
  93                 /*
  94                  * Null proc call
  95                  */
  96                 (void) svc_sendreply(transp, (xdrproc_t)xdr_void, NULL);
  97                 return;
  98
  99         case RPCBPROC_SET:
 100                 /*
 101                  * Check to see whether the message came from
 102                  * loopback transports (for security reasons)
 103                  */
 104                 if (strcasecmp(transp->xp_netid, loopback_dg) &&
 105                     strcasecmp(transp->xp_netid, loopback_vc) &&
 106                     strcasecmp(transp->xp_netid, loopback_vc_ord)) {
 107                         char *uaddr;
 108
 109                         uaddr = taddr2uaddr(rpcbind_get_conf(transp->xp_netid),
 110                             svc_getrpccaller(transp));
 111                         syslog(LOG_ERR, "non-local attempt to set from %s",
 112                             uaddr == NULL ? "<unknown>" : uaddr);
 113                         free(uaddr);
 114                         svcerr_weakauth(transp);
 115                         return;
 116                 }
 117                 xdr_argument = xdr_rpcb;
 118                 xdr_result = xdr_bool;
 119                 local = (bool_t (*)()) rpcbproc_set_com;
 120                 break;
 121
 122         case RPCBPROC_UNSET:
 123                 /*
 124                  * Check to see whether the message came from
 125                  * loopback transports (for security reasons)
 126                  */
 127                 if (strcasecmp(transp->xp_netid, loopback_dg) &&
 128                     strcasecmp(transp->xp_netid, loopback_vc) &&
 129                     strcasecmp(transp->xp_netid, loopback_vc_ord)) {
 130                         char *uaddr;
 131
 132                         uaddr = taddr2uaddr(rpcbind_get_conf(transp->xp_netid),
 133                             svc_getrpccaller(transp));
 134                         syslog(LOG_ERR, "non-local attempt to unset from %s",
 135                             uaddr == NULL ? "<unknown>" : uaddr);
 136                         free(uaddr);
 137                         svcerr_weakauth(transp);
 138                         return;
 139                 }
 140                 xdr_argument = xdr_rpcb;
 141                 xdr_result = xdr_bool;
 142                 local = (bool_t (*)()) rpcbproc_unset_com;
 143                 break;
 144
 145         case RPCBPROC_GETADDR:
 146                 xdr_argument = xdr_rpcb;
 147                 xdr_result = xdr_wrapstring;
 148                 local = (bool_t (*)()) rpcbproc_getaddr_com;
 149                 break;
 150
 151         case RPCBPROC_DUMP:
 152                 xdr_argument = xdr_void;
 153                 xdr_result = xdr_rpcblist_ptr_ptr;
 154                 local = (bool_t (*)()) rpcbproc_dump_com;
 155                 break;
 156
 157         case RPCBPROC_CALLIT:
 158                 rpcbproc_callit_com(rqstp, transp, rqstp->rq_proc, RPCBVERS);
 159                 return;
 160
 161         case RPCBPROC_GETTIME:
 162                 xdr_argument = xdr_void;
 163                 xdr_result = xdr_u_long;
 164                 local = (bool_t (*)()) rpcbproc_gettime_com;
 165                 break;
 166
 167         case RPCBPROC_UADDR2TADDR:
 168                 xdr_argument = xdr_wrapstring;
 169                 xdr_result = xdr_netbuf;
 170                 local = (bool_t (*)()) rpcbproc_uaddr2taddr_com;
 171                 break;
 172
 173         case RPCBPROC_TADDR2UADDR:
 174                 xdr_argument = xdr_netbuf;
 175                 xdr_result = xdr_wrapstring;
 176                 local = (bool_t (*)()) rpcbproc_taddr2uaddr_com;
 177                 break;
 178
 179         default:
 180                 svcerr_noproc(transp);
 181                 return;
 182         }
 183         (void) memset((char *)&argument, 0, sizeof (argument));
 184         if (!svc_getargs(transp, xdr_argument, (char *)&argument)) {
 185                 svcerr_decode(transp);
 186                 if (debugging)
 187                         (void) fprintf(stderr, "rpcbind: could not decode\n");
 188                 return;
 189         }
 190         retval = (*local)(&argument, &result, rqstp, RPCBVERS);
 191         if (retval > 0 && !svc_sendreply(transp, xdr_result, (char *)&result)) {
 192                 svcerr_systemerr(transp);
 193                 if (debugging) {
 194                         (void) fprintf(stderr, "rpcbind: svc_sendreply\n");
 195                         if (doabort) {
 196                                 rpcbind_abort();
 197                         }
 198                 }
 199         }
 200         if (!svc_freeargs(transp, xdr_argument, (char *)&argument)) {
 201                 if (debugging) {
 202                         (void) fprintf(stderr, "unable to free arguments\n");
 203                         if (doabort) {
 204                                 rpcbind_abort();
 205                         }
 206                 }
 207         }
 208
 209         xdr_free(xdr_result, (char *)&result);
 210 }