1 /* $NetBSD: pmap_getport.c,v 1.16 2000/07/06 03:10:34 christos Exp $ */ 2 3 /*- 4 * SPDX-License-Identifier: BSD-3-Clause 5 * 6 * Copyright (c) 2009, Sun Microsystems, Inc. 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions are met: 11 * - Redistributions of source code must retain the above copyright notice, 12 * this list of conditions and the following disclaimer. 13 * - Redistributions in binary form must reproduce the above copyright notice, 14 * this list of conditions and the following disclaimer in the documentation 15 * and/or other materials provided with the distribution. 16 * - Neither the name of Sun Microsystems, Inc. nor the names of its 17 * contributors may be used to endorse or promote products derived 18 * from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 21 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 24 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30 * POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 /* 34 * pmap_getport.c 35 * Client interface to pmap rpc service. 36 * 37 * Copyright (C) 1984, Sun Microsystems, Inc. 38 */ 39 40 #include "namespace.h" 41 #include <sys/types.h> 42 #include <sys/socket.h> 43 44 #include <arpa/inet.h> 45 #include <net/if.h> 46 47 #include <assert.h> 48 #include <unistd.h> 49 50 #include <rpc/rpc.h> 51 #include <rpc/pmap_prot.h> 52 #include <rpc/pmap_clnt.h> 53 #include "un-namespace.h" 54 55 static const struct timeval timeout = { 5, 0 }; 56 static const struct timeval tottimeout = { 60, 0 }; 57 58 /* 59 * Find the mapped port for program,version. 60 * Calls the pmap service remotely to do the lookup. 61 * Returns 0 if no map exists. 62 */ 63 u_short 64 pmap_getport(struct sockaddr_in *address, u_long program, u_long version, 65 u_int protocol) 66 { 67 u_short port = 0; 68 int sock = -1; 69 CLIENT *client; 70 struct pmap parms; 71 72 assert(address != NULL); 73 74 address->sin_port = htons(PMAPPORT); 75 client = clntudp_bufcreate(address, PMAPPROG, 76 PMAPVERS, timeout, &sock, RPCSMALLMSGSIZE, RPCSMALLMSGSIZE); 77 if (client != NULL) { 78 parms.pm_prog = program; 79 parms.pm_vers = version; 80 parms.pm_prot = protocol; 81 parms.pm_port = 0; /* not needed or used */ 82 if (CLNT_CALL(client, (rpcproc_t)PMAPPROC_GETPORT, 83 (xdrproc_t)xdr_pmap, 84 &parms, (xdrproc_t)xdr_u_short, &port, tottimeout) != 85 RPC_SUCCESS){ 86 rpc_createerr.cf_stat = RPC_PMAPFAILURE; 87 clnt_geterr(client, &rpc_createerr.cf_error); 88 } else if (port == 0) { 89 rpc_createerr.cf_stat = RPC_PROGNOTREGISTERED; 90 } 91 CLNT_DESTROY(client); 92 } 93 address->sin_port = 0; 94 return (port); 95 } 96