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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.
*/
#include <alloca.h>
#include <errno.h>
#include <string.h>
#include <rpc/rpc.h>
#include <sys/socket.h>
#include <netdb.h>
/*
* Generic client creation: takes (hostname, program-number, protocol) and
* returns client handle. Default options are set, which the user can
* change using the rpc equivalent of ioctl()'s.
*/
CLIENT *
clnt_create (const char *hostname, u_long prog, u_long vers,
const char *proto)
{
struct hostent hostbuf, *h;
size_t hstbuflen;
char *hsttmpbuf;
struct protoent protobuf, *p;
size_t prtbuflen;
char *prttmpbuf;
struct sockaddr_in sin;
struct sockaddr_un sun;
int sock;
struct timeval tv;
CLIENT *client;
int herr;
if (strcmp (proto, "unix") == 0)
{
__bzero ((char *)&sun, sizeof (sun));
sun.sun_family = AF_UNIX;
strcpy (sun.sun_path, hostname);
sock = RPC_ANYSOCK;
client = clntunix_create (&sun, prog, vers, &sock, 0, 0);
if (client == NULL)
return NULL;
#if 0
/* This is not wanted. This would disable the user from having
a timeout in the clnt_call() call. Only a call to cnlt_control()
by the user should set the timeout value. */
tv.tv_sec = 25;
tv.tv_usec = 0;
clnt_control (client, CLSET_TIMEOUT, (char *)&tv);
#endif
return client;
}
hstbuflen = 1024;
hsttmpbuf = __alloca (hstbuflen);
while (__gethostbyname_r (hostname, &hostbuf, hsttmpbuf, hstbuflen,
&h, &herr) != 0
|| h == NULL)
if (herr != NETDB_INTERNAL || errno != ERANGE)
{
get_rpc_createerr().cf_stat = RPC_UNKNOWNHOST;
return NULL;
}
else
{
/* Enlarge the buffer. */
hstbuflen *= 2;
hsttmpbuf = __alloca (hstbuflen);
}
if (h->h_addrtype != AF_INET)
{
/*
* Only support INET for now
*/
struct rpc_createerr *ce = &get_rpc_createerr ();
ce->cf_stat = RPC_SYSTEMERROR;
ce->cf_error.re_errno = EAFNOSUPPORT;
return NULL;
}
sin.sin_family = h->h_addrtype;
sin.sin_port = 0;
__bzero (sin.sin_zero, sizeof (sin.sin_zero));
memcpy ((char *) &sin.sin_addr, h->h_addr, h->h_length);
prtbuflen = 1024;
prttmpbuf = __alloca (prtbuflen);
while (__getprotobyname_r (proto, &protobuf, prttmpbuf, prtbuflen, &p) != 0
|| p == NULL)
if (errno != ERANGE)
{
struct rpc_createerr *ce = &get_rpc_createerr ();
ce->cf_stat = RPC_UNKNOWNPROTO;
ce->cf_error.re_errno = EPFNOSUPPORT;
return NULL;
}
else
{
/* Enlarge the buffer. */
prtbuflen *= 2;
prttmpbuf = __alloca (prtbuflen);
}
sock = RPC_ANYSOCK;
switch (p->p_proto)
{
case IPPROTO_UDP:
tv.tv_sec = 5;
tv.tv_usec = 0;
client = clntudp_create (&sin, prog, vers, tv, &sock);
if (client == NULL)
{
return NULL;
}
#if 0
/* This is not wanted. This would disable the user from having
a timeout in the clnt_call() call. Only a call to cnlt_control()
by the user should set the timeout value. */
tv.tv_sec = 25;
clnt_control (client, CLSET_TIMEOUT, (char *)&tv);
#endif
break;
case IPPROTO_TCP:
client = clnttcp_create (&sin, prog, vers, &sock, 0, 0);
if (client == NULL)
{
return NULL;
}
#if 0
/* This is not wanted. This would disable the user from having
a timeout in the clnt_call() call. Only a call to cnlt_control()
by the user should set the timeout value. */
tv.tv_sec = 25;
tv.tv_usec = 0;
clnt_control (client, CLSET_TIMEOUT, (char *)&tv);
#endif
break;
default:
{
struct rpc_createerr *ce = &get_rpc_createerr ();
ce->cf_stat = RPC_SYSTEMERROR;
ce->cf_error.re_errno = EPFNOSUPPORT;
}
return (NULL);
}
return client;
}
#ifdef EXPORT_RPC_SYMBOLS
libc_hidden_def (clnt_create)
#else
libc_hidden_nolink (clnt_create, GLIBC_2_0)
#endif
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