usr/src/lib/libc/port/nsl/yp_rsvd.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 /*
  24  * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
  25  * Use is subject to license terms.
  26  */
  27
  28 #pragma ident   "%Z%%M% %I%     %E% SMI"
  29
  30 #include "mt.h"
  31 #include <sys/types.h>
  32 #include <string.h>
  33 #include <stdio.h>
  34 #include <netconfig.h>
  35 #include <netdir.h>
  36 #include <rpc/rpc.h>
  37
  38 static CLIENT *
  39 __yp_clnt_create_rsvdport_netid_req(const char *hostname, rpcprog_t prog,
  40                         rpcvers_t vers, const char *nettype,
  41                         const uint_t sendsz, const uint_t recvsz)
  42 {
  43         struct netconfig *nconf;
  44         struct netbuf *svcaddr;
  45         struct t_bind *tbind;
  46         CLIENT *clnt = NULL;
  47         int fd;
  48         const char *nt;
  49
  50         if (nettype == NULL)
  51                 return (0);
  52         else
  53                 nt = nettype;
  54
  55         if (strcmp(nt, "udp") && strcmp(nt, "tcp") &&
  56                 strcmp(nt, "udp6") && strcmp(nt, "tcp6"))
  57                 return (clnt_create(hostname, prog, vers, nt));
  58
  59         if ((nconf = getnetconfigent((void *) nt)) == NULL)
  60                 return (NULL);
  61
  62         if ((fd = t_open(nconf->nc_device, O_RDWR, NULL)) == -1) {
  63                 freenetconfigent(nconf);
  64                 return (NULL);
  65         }
  66
  67         /* Attempt to set reserved port, but we don't care if it fails */
  68         (void) netdir_options(nconf, ND_SET_RESERVEDPORT, fd, NULL);
  69
  70         /* LINTED pointer cast */
  71         if ((tbind = (struct t_bind *)t_alloc(fd, T_BIND, T_ADDR)) == NULL) {
  72                 freenetconfigent(nconf);
  73                 return (NULL);
  74         }
  75
  76         svcaddr = &(tbind->addr);
  77
  78         if (!rpcb_getaddr(prog, vers, nconf, svcaddr, hostname)) {
  79                 (void) t_close(fd);
  80                 (void) t_free((char *)tbind, T_BIND);
  81                 freenetconfigent(nconf);
  82                 return (NULL);
  83         }
  84
  85         if ((clnt = clnt_tli_create(fd, nconf, svcaddr,
  86                                 prog, vers, sendsz, recvsz)) == NULL) {
  87                 (void) t_close(fd);
  88                 (void) t_free((char *)tbind, T_BIND);
  89         } else {
  90                 (void) t_free((char *)tbind, T_BIND);
  91                 clnt_control(clnt, CLSET_FD_CLOSE, NULL);
  92         }
  93         freenetconfigent(nconf);
  94         return (clnt);
  95 }
  96
  97
  98 CLIENT *
  99 __yp_clnt_create_rsvdport(const char *hostname, rpcprog_t prog,
 100                         rpcvers_t vers, const char *nettype,
 101                         const uint_t sendsz, const uint_t recvsz)
 102 {
 103         if (nettype == 0) {
 104                 CLIENT *ret;
 105                 ret = __yp_clnt_create_rsvdport_netid_req(hostname, prog,
 106                                         vers, "udp6", sendsz, recvsz);
 107                 if (ret == 0)
 108                         ret = __yp_clnt_create_rsvdport_netid_req(hostname,
 109                                         prog, vers, "udp", sendsz, recvsz);
 110                 return (ret);
 111         } else {
 112                 return (__yp_clnt_create_rsvdport_netid_req(hostname, prog,
 113                                                         vers, nettype,
 114                                                         sendsz, recvsz));
 115         }
 116 }