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