1 /* $OpenBSD: pmap_getport.c,v 1.13 2015/09/13 15:36:56 guenther Exp $ */ 2 3 /* 4 * Copyright (c) 2010, Oracle America, Inc. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions are 8 * met: 9 * 10 * * Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * * Redistributions in binary form must reproduce the above 13 * copyright notice, this list of conditions and the following 14 * disclaimer in the documentation and/or other materials 15 * provided with the distribution. 16 * * Neither the name of the "Oracle America, 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 21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 24 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 25 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE 27 * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 29 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 30 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 31 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34 /* 35 * pmap_getport.c 36 * Client interface to pmap rpc service. 37 */ 38 39 #include <unistd.h> 40 #include <rpc/rpc.h> 41 #include <rpc/pmap_prot.h> 42 #include <rpc/pmap_clnt.h> 43 #include <sys/socket.h> 44 #include <net/if.h> 45 46 static struct timeval timeout = { 5, 0 }; 47 static struct timeval tottimeout = { 60, 0 }; 48 49 /* 50 * Find the mapped port for program,version. 51 * Calls the pmap service remotely to do the lookup. 52 * Returns 0 if no map exists. 53 */ 54 u_short 55 pmap_getport(struct sockaddr_in *address, u_long program, u_long version, 56 u_int protocol) 57 { 58 u_short port = 0; 59 int sock = -1; 60 CLIENT *client; 61 struct pmap parms; 62 63 address->sin_port = htons(PMAPPORT); 64 client = clntudp_bufcreate(address, PMAPPROG, 65 PMAPVERS, timeout, &sock, RPCSMALLMSGSIZE, RPCSMALLMSGSIZE); 66 if (client != NULL) { 67 parms.pm_prog = program; 68 parms.pm_vers = version; 69 parms.pm_prot = protocol; 70 parms.pm_port = 0; /* not needed or used */ 71 if (CLNT_CALL(client, PMAPPROC_GETPORT, xdr_pmap, &parms, 72 xdr_u_short, &port, tottimeout) != RPC_SUCCESS){ 73 rpc_createerr.cf_stat = RPC_PMAPFAILURE; 74 clnt_geterr(client, &rpc_createerr.cf_error); 75 } else if (port == 0) { 76 rpc_createerr.cf_stat = RPC_PROGNOTREGISTERED; 77 } 78 CLNT_DESTROY(client); 79 } 80 address->sin_port = 0; 81 return (port); 82 } 83 DEF_WEAK(pmap_getport); 84