/* $NetBSD: clnt.h,v 1.14 2000/06/02 22:57:55 fvdl Exp $ */

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/*

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* Copyright (c) 2010, Oracle America, Inc.

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* All rights reserved.

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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 met:

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* - Redistributions of source code must retain the above copyright notice,

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* this list of conditions and the following disclaimer.

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* - Redistributions in binary form must reproduce the above copyright notice,

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* this list of conditions and the following disclaimer in the documentation

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* and/or other materials 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 "AS IS"

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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE

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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR

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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF

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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS

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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN

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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)

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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

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* POSSIBILITY OF SUCH DAMAGE.

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*

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* from: @(#)clnt.h 1.31 94/04/29 SMI

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* from: @(#)clnt.h 2.1 88/07/29 4.0 RPCSRC

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* $FreeBSD: src/include/rpc/clnt.h,v 1.21 2003/01/24 01:47:55 fjoe Exp $

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*/

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/*

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* clnt.h - Client side remote procedure call interface.

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*/

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#ifndef _TIRPC_CLNT_H_

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#define _TIRPC_CLNT_H_

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#include <rpc/clnt_stat.h>

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#include <rpc/auth.h>

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#include <netconfig.h>

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#include <sys/un.h>

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/*

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* Well-known IPV6 RPC broadcast address.

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*/

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#define RPCB_MULTICAST_ADDR "ff02::202"

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/*

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* the following errors are in general unrecoverable. The caller

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* should give up rather than retry.

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*/

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#define IS_UNRECOVERABLE_RPC(s) (((s) == RPC_AUTHERROR) || \

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((s) == RPC_CANTENCODEARGS) || \

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((s) == RPC_CANTDECODERES) || \

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((s) == RPC_VERSMISMATCH) || \

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((s) == RPC_PROCUNAVAIL) || \

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((s) == RPC_PROGUNAVAIL) || \

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((s) == RPC_PROGVERSMISMATCH) || \

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((s) == RPC_CANTDECODEARGS))

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/*

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* Error info.

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*/

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struct rpc_err {

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enum clnt_stat re_status;

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union {

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int RE_errno; /* related system error */

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enum auth_stat RE_why; /* why the auth error occurred */

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struct {

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rpcvers_t low; /* lowest version supported */

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rpcvers_t high; /* highest version supported */

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} RE_vers;

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struct { /* maybe meaningful if RPC_FAILED */

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int32_t s1;

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int32_t s2;

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} RE_lb; /* life boot & debugging only */

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} ru;

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#define re_errno ru.RE_errno

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#define re_why ru.RE_why

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#define re_vers ru.RE_vers

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#define re_lb ru.RE_lb

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};

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/*

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* Client rpc handle.

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* Created by individual implementations

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* Client is responsible for initializing auth, see e.g. auth_none.c.

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*/

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typedef struct __rpc_client {

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AUTH *cl_auth; /* authenticator */

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struct clnt_ops {

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/* call remote procedure */

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enum clnt_stat (*cl_call)(struct __rpc_client *,

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rpcproc_t, xdrproc_t, void *, xdrproc_t,

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void *, struct timeval);

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/* abort a call */

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void (*cl_abort)(struct __rpc_client *);

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/* get specific error code */

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void (*cl_geterr)(struct __rpc_client *,

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struct rpc_err *);

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/* frees results */

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bool_t (*cl_freeres)(struct __rpc_client *,

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xdrproc_t, void *);

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/* destroy this structure */

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void (*cl_destroy)(struct __rpc_client *);

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/* the ioctl() of rpc */

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bool_t (*cl_control)(struct __rpc_client *, u_int,

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void *);

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} *cl_ops;

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void *cl_private; /* private stuff */

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char *cl_netid; /* network token */

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char *cl_tp; /* device name */

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} CLIENT;

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/*

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* Timers used for the pseudo-transport protocol when using datagrams

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*/

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struct rpc_timers {

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u_short rt_srtt; /* smoothed round-trip time */

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u_short rt_deviate; /* estimated deviation */

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u_long rt_rtxcur; /* current (backed-off) rto */

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};

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/*

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* Feedback values used for possible congestion and rate control

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*/

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#define FEEDBACK_REXMIT1 1 /* first retransmit */

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#define FEEDBACK_OK 2 /* no retransmits */

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/* Used to set version of portmapper used in broadcast */

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#define CLCR_SET_LOWVERS 3

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#define CLCR_GET_LOWVERS 4

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#define RPCSMALLMSGSIZE 400 /* a more reasonable packet size */

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/*

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* client side rpc interface ops

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*

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* Parameter types are:

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*

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*/

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/*

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* enum clnt_stat

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* CLNT_CALL(rh, proc, xargs, argsp, xres, resp, timeout)

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* CLIENT *rh;

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* rpcproc_t proc;

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* xdrproc_t xargs;

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* void *argsp;

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* xdrproc_t xres;

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* void *resp;

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* struct timeval timeout;

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*/

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#define CLNT_CALL(rh, proc, xargs, argsp, xres, resp, secs) \

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((*(rh)->cl_ops->cl_call)(rh, proc, xargs, \

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argsp, xres, resp, secs))

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#define clnt_call(rh, proc, xargs, argsp, xres, resp, secs) \

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((*(rh)->cl_ops->cl_call)(rh, proc, xargs, \

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argsp, xres, resp, secs))

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/*

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* void

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* CLNT_ABORT(rh);

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* CLIENT *rh;

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*/

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#define CLNT_ABORT(rh) ((*(rh)->cl_ops->cl_abort)(rh))

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#define clnt_abort(rh) ((*(rh)->cl_ops->cl_abort)(rh))

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/*

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* struct rpc_err

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* CLNT_GETERR(rh);

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* CLIENT *rh;

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*/

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#define CLNT_GETERR(rh,errp) ((*(rh)->cl_ops->cl_geterr)(rh, errp))

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#define clnt_geterr(rh,errp) ((*(rh)->cl_ops->cl_geterr)(rh, errp))

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/*

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* bool_t

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* CLNT_FREERES(rh, xres, resp);

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* CLIENT *rh;

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* xdrproc_t xres;

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* void *resp;

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*/

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#define CLNT_FREERES(rh,xres,resp) ((*(rh)->cl_ops->cl_freeres)(rh,xres,resp))

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#define clnt_freeres(rh,xres,resp) ((*(rh)->cl_ops->cl_freeres)(rh,xres,resp))

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/*

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* bool_t

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* CLNT_CONTROL(cl, request, info)

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* CLIENT *cl;

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* u_int request;

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* char *info;

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*/

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#define CLNT_CONTROL(cl,rq,in) ((*(cl)->cl_ops->cl_control)(cl,rq,in))

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#define clnt_control(cl,rq,in) ((*(cl)->cl_ops->cl_control)(cl,rq,in))

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/*

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* control operations that apply to both udp and tcp transports

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*/

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#define CLSET_TIMEOUT 1 /* set timeout (timeval) */

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#define CLGET_TIMEOUT 2 /* get timeout (timeval) */

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#define CLGET_SERVER_ADDR 3 /* get server's address (sockaddr) */

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#define CLGET_FD 6 /* get connections file descriptor */

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#define CLGET_SVC_ADDR 7 /* get server's address (netbuf) */

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#define CLSET_FD_CLOSE 8 /* close fd while clnt_destroy */

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#define CLSET_FD_NCLOSE 9 /* Do not close fd while clnt_destroy */

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#define CLGET_XID 10 /* Get xid */

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#define CLSET_XID 11 /* Set xid */

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#define CLGET_VERS 12 /* Get version number */

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#define CLSET_VERS 13 /* Set version number */

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#define CLGET_PROG 14 /* Get program number */

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#define CLSET_PROG 15 /* Set program number */

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#define CLSET_SVC_ADDR 16 /* get server's address (netbuf) */

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#define CLSET_PUSH_TIMOD 17 /* push timod if not already present */

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#define CLSET_POP_TIMOD 18 /* pop timod */

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/*

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* Connectionless only control operations

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*/

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#define CLSET_RETRY_TIMEOUT 4 /* set retry timeout (timeval) */

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#define CLGET_RETRY_TIMEOUT 5 /* get retry timeout (timeval) */

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#define CLSET_ASYNC 19

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#define CLSET_CONNECT 20 /* Use connect() for UDP. (int) */

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/*

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* void

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* CLNT_DESTROY(rh);

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* CLIENT *rh;

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*/

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#define CLNT_DESTROY(rh) ((*(rh)->cl_ops->cl_destroy)(rh))

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#define clnt_destroy(rh) ((*(rh)->cl_ops->cl_destroy)(rh))

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/*

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* RPCTEST is a test program which is accessible on every rpc

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* transport/port. It is used for testing, performance evaluation,

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* and network administration.

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*/

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#define RPCTEST_PROGRAM ((rpcprog_t)1)

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#define RPCTEST_VERSION ((rpcvers_t)1)

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#define RPCTEST_NULL_PROC ((rpcproc_t)2)

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#define RPCTEST_NULL_BATCH_PROC ((rpcproc_t)3)

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/*

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* By convention, procedure 0 takes null arguments and returns them

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*/

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#define NULLPROC ((rpcproc_t)0)

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/*

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* Below are the client handle creation routines for the various

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* implementations of client side rpc. They can return NULL if a

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* creation failure occurs.

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*/

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/*

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* Generic client creation routine. Supported protocols are those that

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* belong to the nettype namespace (/etc/netconfig).

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*/

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#ifdef __cplusplus

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extern "C" {

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#endif

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extern CLIENT *clnt_create(const char *, const rpcprog_t, const rpcvers_t,

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const char *);

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/*

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*

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* const char *hostname; -- hostname

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* const rpcprog_t prog; -- program number

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* const rpcvers_t vers; -- version number

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* const char *nettype; -- network type

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*/

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/*

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* Generic client creation routine. Just like clnt_create(), except

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* it takes an additional timeout parameter.

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*/

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extern CLIENT * clnt_create_timed(const char *, const rpcprog_t,

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const rpcvers_t, const char *, const struct timeval *);

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/*

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*

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* const char *hostname; -- hostname

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* const rpcprog_t prog; -- program number

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* const rpcvers_t vers; -- version number

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* const char *nettype; -- network type

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* const struct timeval *tp; -- timeout

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*/

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/*

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* Generic client creation routine. Supported protocols are which belong

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* to the nettype name space.

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*/

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extern CLIENT *clnt_create_vers(const char *, const rpcprog_t, rpcvers_t *,

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const rpcvers_t, const rpcvers_t,

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const char *);

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/*

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* const char *host; -- hostname

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* const rpcprog_t prog; -- program number

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* rpcvers_t *vers_out; -- servers highest available version

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* const rpcvers_t vers_low; -- low version number

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* const rpcvers_t vers_high; -- high version number

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* const char *nettype; -- network type

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*/

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/*

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* Generic client creation routine. Supported protocols are which belong

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* to the nettype name space.

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*/

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extern CLIENT * clnt_create_vers_timed(const char *, const rpcprog_t,

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rpcvers_t *, const rpcvers_t, const rpcvers_t, const char *,

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const struct timeval *);

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/*

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* const char *host; -- hostname

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* const rpcprog_t prog; -- program number

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* rpcvers_t *vers_out; -- servers highest available version

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* const rpcvers_t vers_low; -- low version number

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* const rpcvers_t vers_high; -- high version number

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* const char *nettype; -- network type

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* const struct timeval *tp -- timeout

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*/

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/*

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* Generic client creation routine. It takes a netconfig structure

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* instead of nettype

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*/

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extern CLIENT *clnt_tp_create(const char *, const rpcprog_t,

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const rpcvers_t, const struct netconfig *);

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/*

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* const char *hostname; -- hostname

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* const rpcprog_t prog; -- program number

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* const rpcvers_t vers; -- version number

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* const struct netconfig *netconf; -- network config structure

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*/

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/*

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* Generic client creation routine. Just like clnt_tp_create(), except

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* it takes an additional timeout parameter.

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*/

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extern CLIENT * clnt_tp_create_timed(const char *, const rpcprog_t,

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const rpcvers_t, const struct netconfig *, const struct timeval *);

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/*

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* const char *hostname; -- hostname

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* const rpcprog_t prog; -- program number

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* const rpcvers_t vers; -- version number

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* const struct netconfig *netconf; -- network config structure

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* const struct timeval *tp -- timeout

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*/

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/*

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* Generic TLI create routine. Only provided for compatibility.

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*/

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extern CLIENT *clnt_tli_create(const int, const struct netconfig *,

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struct netbuf *, const rpcprog_t,

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const rpcvers_t, const u_int, const u_int);

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/*

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* const register int fd; -- fd

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* const struct netconfig *nconf; -- netconfig structure

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* struct netbuf *svcaddr; -- servers address

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* const u_long prog; -- program number

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* const u_long vers; -- version number

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* const u_int sendsz; -- send size

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* const u_int recvsz; -- recv size

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*/

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/*

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* Low level clnt create routine for connectionful transports, e.g. tcp.

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*/

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extern CLIENT *clnt_vc_create(const int, const struct netbuf *,

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const rpcprog_t, const rpcvers_t,

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u_int, u_int);

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/*

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* Added for compatibility to old rpc 4.0. Obsoleted by clnt_vc_create().

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*/

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extern CLIENT *clntunix_create(struct sockaddr_un *,

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u_long, u_long, int *, u_int, u_int);

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/*

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* const int fd; -- open file descriptor

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* const struct netbuf *svcaddr; -- servers address

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* const rpcprog_t prog; -- program number

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* const rpcvers_t vers; -- version number

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* const u_int sendsz; -- buffer recv size

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* const u_int recvsz; -- buffer send size

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*/

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/*

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* Low level clnt create routine for connectionless transports, e.g. udp.

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*/

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extern CLIENT *clnt_dg_create(const int, const struct netbuf *,

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const rpcprog_t, const rpcvers_t,

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const u_int, const u_int);

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/*

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* const int fd; -- open file descriptor

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* const struct netbuf *svcaddr; -- servers address

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* const rpcprog_t program; -- program number

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* const rpcvers_t version; -- version number

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* const u_int sendsz; -- buffer recv size

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* const u_int recvsz; -- buffer send size

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*/

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/*

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* Memory based rpc (for speed check and testing)

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* CLIENT *

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* clnt_raw_create(prog, vers)

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* u_long prog;

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* u_long vers;

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*/

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extern CLIENT *clnt_raw_create(rpcprog_t, rpcvers_t);

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#ifdef __cplusplus

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}

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#endif

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/*

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* Print why creation failed

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*/

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#ifdef __cplusplus

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extern "C" {

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#endif

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extern void clnt_pcreateerror(const char *); /* stderr */

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extern char *clnt_spcreateerror(const char *); /* string */

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#ifdef __cplusplus

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}

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#endif

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/*

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* Like clnt_perror(), but is more verbose in its output

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*/

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#ifdef __cplusplus

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extern "C" {

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#endif

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extern void clnt_perrno(enum clnt_stat); /* stderr */

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extern char *clnt_sperrno(enum clnt_stat); /* string */

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#ifdef __cplusplus

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}

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#endif

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/*

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* Print an English error message, given the client error code

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*/

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#ifdef __cplusplus

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extern "C" {

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#endif

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extern void clnt_perror(CLIENT *, const char *); /* stderr */

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extern char *clnt_sperror(CLIENT *, const char *); /* string */

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#ifdef __cplusplus

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}

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#endif

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/*

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* If a creation fails, the following allows the user to figure out why.

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*/

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struct rpc_createerr {

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enum clnt_stat cf_stat;

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struct rpc_err cf_error; /* useful when cf_stat == RPC_PMAPFAILURE */

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};

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#ifdef __cplusplus

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extern "C" {

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#endif

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extern struct rpc_createerr *__rpc_createerr(void);

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#ifdef __cplusplus

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}

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#endif

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#define get_rpc_createerr() (*(__rpc_createerr()))

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#define rpc_createerr (*(__rpc_createerr()))

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/*

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* The simplified interface:

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* enum clnt_stat

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* rpc_call(host, prognum, versnum, procnum, inproc, in, outproc, out, nettype)

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* const char *host;

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* const rpcprog_t prognum;

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* const rpcvers_t versnum;

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* const rpcproc_t procnum;

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* const xdrproc_t inproc, outproc;

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* const char *in;

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* char *out;

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* const char *nettype;

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*/

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#ifdef __cplusplus

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extern "C" {

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#endif

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extern enum clnt_stat rpc_call(const char *, const rpcprog_t,

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const rpcvers_t, const rpcproc_t,

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const xdrproc_t, const char *,

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const xdrproc_t, char *, const char *);

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#ifdef __cplusplus

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}

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#endif

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