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/*
* Copyright (c) 2010, Oracle America, Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
* * Neither the name of the "Oracle America, Inc." nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/*
* pmap_clnt.c
* Client interface to pmap rpc service.
*/
#include <stdio.h>
#include <unistd.h>
#include <libintl.h>
#include <net/if.h>
#include <ifaddrs.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <rpc/rpc.h>
#include <rpc/pmap_prot.h>
#include <rpc/pmap_clnt.h>
/*
* Same as get_myaddress, but we try to use the loopback
* interface. portmap caches interfaces, and on DHCP clients,
* it could be that only loopback is started at this time.
*/
static bool_t
__get_myaddress (struct sockaddr_in *addr)
{
struct ifaddrs *ifa;
if (getifaddrs (&ifa) != 0)
{
perror ("get_myaddress: getifaddrs");
exit (1);
}
int loopback = 1;
struct ifaddrs *run;
again:
run = ifa;
while (run != NULL)
{
if ((run->ifa_flags & IFF_UP)
&& run->ifa_addr != NULL
&& run->ifa_addr->sa_family == AF_INET
&& ((run->ifa_flags & IFF_LOOPBACK) || loopback == 0))
{
*addr = *((struct sockaddr_in *) run->ifa_addr);
addr->sin_port = htons (PMAPPORT);
goto out;
}
run = run->ifa_next;
}
if (loopback == 1)
{
loopback = 0;
goto again;
}
out:
freeifaddrs (ifa);
return run == NULL ? FALSE : TRUE;
}
static const struct timeval timeout = {5, 0};
static const struct timeval tottimeout = {60, 0};
/*
* Set a mapping between program,version and port.
* Calls the pmap service remotely to do the mapping.
*/
bool_t
pmap_set (u_long program, u_long version, int protocol, u_short port)
{
struct sockaddr_in myaddress;
int socket = -1;
CLIENT *client;
struct pmap parms;
bool_t rslt;
if (!__get_myaddress (&myaddress))
return FALSE;
client = clntudp_bufcreate (&myaddress, PMAPPROG, PMAPVERS, timeout, &socket,
RPCSMALLMSGSIZE, RPCSMALLMSGSIZE);
if (client == (CLIENT *) NULL)
return (FALSE);
parms.pm_prog = program;
parms.pm_vers = version;
parms.pm_prot = protocol;
parms.pm_port = port;
if (CLNT_CALL (client, PMAPPROC_SET, (xdrproc_t)xdr_pmap,
(caddr_t)&parms, (xdrproc_t)xdr_bool, (caddr_t)&rslt,
tottimeout) != RPC_SUCCESS)
{
clnt_perror (client, _("Cannot register service"));
rslt = FALSE;
}
CLNT_DESTROY (client);
/* (void)close(socket); CLNT_DESTROY closes it */
return rslt;
}
libc_hidden_nolink (pmap_set, GLIBC_2_0)
/*
* Remove the mapping between program,version and port.
* Calls the pmap service remotely to do the un-mapping.
*/
bool_t
pmap_unset (u_long program, u_long version)
{
struct sockaddr_in myaddress;
int socket = -1;
CLIENT *client;
struct pmap parms;
bool_t rslt;
if (!__get_myaddress (&myaddress))
return FALSE;
client = clntudp_bufcreate (&myaddress, PMAPPROG, PMAPVERS, timeout, &socket,
RPCSMALLMSGSIZE, RPCSMALLMSGSIZE);
if (client == (CLIENT *) NULL)
return FALSE;
parms.pm_prog = program;
parms.pm_vers = version;
parms.pm_port = parms.pm_prot = 0;
CLNT_CALL (client, PMAPPROC_UNSET, (xdrproc_t)xdr_pmap,
(caddr_t)&parms, (xdrproc_t)xdr_bool, (caddr_t)&rslt,
tottimeout);
CLNT_DESTROY (client);
/* (void)close(socket); CLNT_DESTROY already closed it */
return rslt;
}
libc_hidden_nolink (pmap_unset, GLIBC_2_0)
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