147 lines
4.1 KiB
C
147 lines
4.1 KiB
C
/* @(#)pmap_getport.c 2.2 88/08/01 4.0 RPCSRC */
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/*
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* Sun RPC is a product of Sun Microsystems, Inc. and is provided for
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* unrestricted use provided that this legend is included on all tape
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* media and as a part of the software program in whole or part. Users
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* may copy or modify Sun RPC without charge, but are not authorized
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* to license or distribute it to anyone else except as part of a product or
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* program developed by the user.
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*
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* SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
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* WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
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*
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* Sun RPC is provided with no support and without any obligation on the
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* part of Sun Microsystems, Inc. to assist in its use, correction,
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* modification or enhancement.
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*
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* SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
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* INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
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* OR ANY PART THEREOF.
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*
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* In no event will Sun Microsystems, Inc. be liable for any lost revenue
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* or profits or other special, indirect and consequential damages, even if
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* Sun has been advised of the possibility of such damages.
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*
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* Sun Microsystems, Inc.
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* 2550 Garcia Avenue
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* Mountain View, California 94043
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*/
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#if !defined(lint) && defined(SCCSIDS)
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static char sccsid[] = "@(#)pmap_getport.c 1.9 87/08/11 Copyr 1984 Sun Micro";
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#endif
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/*
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* pmap_getport.c
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* Client interface to pmap rpc service.
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*
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* Copyright (C) 1984, Sun Microsystems, Inc.
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*/
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#include <stdbool.h>
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#include <unistd.h>
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#include <rpc/rpc.h>
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#include <rpc/pmap_prot.h>
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#include <rpc/pmap_clnt.h>
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#include <sys/socket.h>
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static const struct timeval timeout =
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{5, 0};
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static const struct timeval tottimeout =
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{60, 0};
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/*
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* Create a socket that is locally bound to a non-reserve port. For
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* any failures, -1 is returned which will cause the RPC code to
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* create the socket.
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*/
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int
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internal_function
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__get_socket (struct sockaddr_in *saddr)
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{
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int so = __socket (AF_INET, SOCK_STREAM, IPPROTO_TCP);
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if (so < 0)
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return -1;
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struct sockaddr_in laddr;
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socklen_t namelen = sizeof (laddr);
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laddr.sin_family = AF_INET;
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laddr.sin_port = 0;
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laddr.sin_addr.s_addr = htonl (INADDR_ANY);
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int cc = __bind (so, (struct sockaddr *) &laddr, namelen);
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if (__builtin_expect (cc < 0, 0))
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{
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fail:
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__close (so);
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return -1;
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}
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cc = __connect (so, (struct sockaddr *) saddr, namelen);
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if (__builtin_expect (cc < 0, 0))
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goto fail;
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return so;
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}
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/*
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* Find the mapped port for program,version.
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* Calls the pmap service remotely to do the lookup.
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* Returns 0 if no map exists.
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*/
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u_short
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pmap_getport (address, program, version, protocol)
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struct sockaddr_in *address;
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u_long program;
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u_long version;
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u_int protocol;
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{
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u_short port = 0;
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int socket = -1;
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CLIENT *client;
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struct pmap parms;
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bool closeit = false;
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address->sin_port = htons (PMAPPORT);
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if (protocol == IPPROTO_TCP)
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{
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/* Don't need a reserved port to get ports from the portmapper. */
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socket = __get_socket(address);
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if (socket != -1)
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closeit = true;
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client = INTUSE(clnttcp_create) (address, PMAPPROG, PMAPVERS, &socket,
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RPCSMALLMSGSIZE, RPCSMALLMSGSIZE);
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}
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else
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client = INTUSE(clntudp_bufcreate) (address, PMAPPROG, PMAPVERS, timeout,
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&socket, RPCSMALLMSGSIZE,
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RPCSMALLMSGSIZE);
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if (client != (CLIENT *) NULL)
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{
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struct rpc_createerr *ce = &get_rpc_createerr ();
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parms.pm_prog = program;
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parms.pm_vers = version;
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parms.pm_prot = protocol;
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parms.pm_port = 0; /* not needed or used */
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if (CLNT_CALL (client, PMAPPROC_GETPORT, (xdrproc_t)INTUSE(xdr_pmap),
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(caddr_t)&parms, (xdrproc_t)INTUSE(xdr_u_short),
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(caddr_t)&port, tottimeout) != RPC_SUCCESS)
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{
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ce->cf_stat = RPC_PMAPFAILURE;
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clnt_geterr (client, &ce->cf_error);
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}
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else if (port == 0)
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{
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ce->cf_stat = RPC_PROGNOTREGISTERED;
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}
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CLNT_DESTROY (client);
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}
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/* We only need to close the socket here if we opened it. */
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if (closeit)
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(void) __close (socket);
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address->sin_port = 0;
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return port;
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}
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libc_hidden_def (pmap_getport)
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