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/* @(#)clnt_generic.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[] = "@(#)clnt_generic.c 1.4 87/08/11 (C) 1987 SMI";
#endif
/*
* Copyright (C) 1987, Sun Microsystems, Inc.
*/
#include <alloca.h>
#include <errno.h>
#include <string.h>
#include <rpc/rpc.h>
#include <sys/socket.h>
#include <sys/errno.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;
tv.tv_sec = 25;
tv.tv_usec = 0;
clnt_control (client, CLSET_TIMEOUT, (char *)&tv);
return client;
}
hstbuflen = 1024;
hsttmpbuf = __alloca (hstbuflen);
while (__gethostbyname_r (hostname, &hostbuf, hsttmpbuf, hstbuflen,
&h, &herr) < 0)
if (herr != NETDB_INTERNAL || errno != ERANGE)
{
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
*/
rpc_createerr.cf_stat = RPC_SYSTEMERROR;
rpc_createerr.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));
bcopy (h->h_addr, (char *) &sin.sin_addr, h->h_length);
prtbuflen = 1024;
prttmpbuf = __alloca (prtbuflen);
while (__getprotobyname_r (proto, &protobuf, prttmpbuf, prtbuflen, &p)
< 0)
if (errno != ERANGE)
{
rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
rpc_createerr.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;
}
tv.tv_sec = 25;
clnt_control (client, CLSET_TIMEOUT, (char *)&tv);
break;
case IPPROTO_TCP:
client = clnttcp_create (&sin, prog, vers, &sock, 0, 0);
if (client == NULL)
{
return NULL;
}
tv.tv_sec = 25;
tv.tv_usec = 0;
clnt_control (client, CLSET_TIMEOUT, (char *)&tv);
break;
default:
rpc_createerr.cf_stat = RPC_SYSTEMERROR;
rpc_createerr.cf_error.re_errno = EPFNOSUPPORT;
return (NULL);
}
return client;
}
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