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