/* $NetBSD: clnt.h,v 1.14 2000/06/02 22:57:55 fvdl Exp $ */
/*-
* SPDX-License-Identifier: BSD-3-Clause
*
* Copyright (c) 2010, Oracle America, Inc.
* All rights reserved.
*
* 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.
*
* from: @(#)clnt.h 1.31 94/04/29 SMI
* from: @(#)clnt.h 2.1 88/07/29 4.0 RPCSRC
*/
/*
* clnt.h - Client side remote procedure call interface.
*/
#ifndef _RPC_CLNT_H_
#define _RPC_CLNT_H_
#include <rpc/clnt_stat.h>
#include <sys/cdefs.h>
#include <netconfig.h>
#include <sys/un.h>
/*
* Well-known IPV6 RPC broadcast address.
*/
#define RPCB_MULTICAST_ADDR "ff02::202"
/*
* the following errors are in general unrecoverable. The caller
* should give up rather than retry.
*/
#define IS_UNRECOVERABLE_RPC(s) (((s) == RPC_AUTHERROR) || \
((s) == RPC_CANTENCODEARGS) || \
((s) == RPC_CANTDECODERES) || \
((s) == RPC_VERSMISMATCH) || \
((s) == RPC_PROCUNAVAIL) || \
((s) == RPC_PROGUNAVAIL) || \
((s) == RPC_PROGVERSMISMATCH) || \
((s) == RPC_CANTDECODEARGS))
/*
* Error info.
*/
struct rpc_err {
enum clnt_stat re_status;
union {
int RE_errno; /* related system error */
enum auth_stat RE_why; /* why the auth error occurred */
struct {
rpcvers_t low; /* lowest version supported */
rpcvers_t high; /* highest version supported */
} RE_vers;
struct { /* maybe meaningful if RPC_FAILED */
int32_t s1;
int32_t s2;
} RE_lb; /* life boot & debugging only */
} ru;
#define re_errno ru.RE_errno
#define re_why ru.RE_why
#define re_vers ru.RE_vers
#define re_lb ru.RE_lb
};
/*
* Client rpc handle.
* Created by individual implementations
* Client is responsible for initializing auth, see e.g. auth_none.c.
*/
typedef struct __rpc_client {
AUTH *cl_auth; /* authenticator */
struct clnt_ops {
/* call remote procedure */
enum clnt_stat (*cl_call)(struct __rpc_client *,
rpcproc_t, xdrproc_t, void *, xdrproc_t,
void *, struct timeval);
/* abort a call */
void (*cl_abort)(struct __rpc_client *);
/* get specific error code */
void (*cl_geterr)(struct __rpc_client *,
struct rpc_err *);
/* frees results */
bool_t (*cl_freeres)(struct __rpc_client *,
xdrproc_t, void *);
/* destroy this structure */
void (*cl_destroy)(struct __rpc_client *);
/* the ioctl() of rpc */
bool_t (*cl_control)(struct __rpc_client *, u_int,
void *);
} *cl_ops;
void *cl_private; /* private stuff */
char *cl_netid; /* network token */
char *cl_tp; /* device name */
} CLIENT;
/*
* Timers used for the pseudo-transport protocol when using datagrams
*/
struct rpc_timers {
u_short rt_srtt; /* smoothed round-trip time */
u_short rt_deviate; /* estimated deviation */
u_long rt_rtxcur; /* current (backed-off) rto */
};
/*
* Feedback values used for possible congestion and rate control
*/
#define FEEDBACK_REXMIT1 1 /* first retransmit */
#define FEEDBACK_OK 2 /* no retransmits */
/* Used to set version of portmapper used in broadcast */
#define CLCR_SET_LOWVERS 3
#define CLCR_GET_LOWVERS 4
#define RPCSMALLMSGSIZE 400 /* a more reasonable packet size */
/*
* client side rpc interface ops
*
* Parameter types are:
*
*/
/*
* enum clnt_stat
* CLNT_CALL(rh, proc, xargs, argsp, xres, resp, timeout)
* CLIENT *rh;
* rpcproc_t proc;
* xdrproc_t xargs;
* void *argsp;
* xdrproc_t xres;
* void *resp;
* struct timeval timeout;
*/
#define CLNT_CALL(rh, proc, xargs, argsp, xres, resp, secs) \
((*(rh)->cl_ops->cl_call)(rh, proc, xargs, \
argsp, xres, resp, secs))
#define clnt_call(rh, proc, xargs, argsp, xres, resp, secs) \
((*(rh)->cl_ops->cl_call)(rh, proc, xargs, \
argsp, xres, resp, secs))
/*
* void
* CLNT_ABORT(rh);
* CLIENT *rh;
*/
#define CLNT_ABORT(rh) ((*(rh)->cl_ops->cl_abort)(rh))
#define clnt_abort(rh) ((*(rh)->cl_ops->cl_abort)(rh))
/*
* struct rpc_err
* CLNT_GETERR(rh);
* CLIENT *rh;
*/
#define CLNT_GETERR(rh,errp) ((*(rh)->cl_ops->cl_geterr)(rh, errp))
#define clnt_geterr(rh,errp) ((*(rh)->cl_ops->cl_geterr)(rh, errp))
/*
* bool_t
* CLNT_FREERES(rh, xres, resp);
* CLIENT *rh;
* xdrproc_t xres;
* void *resp;
*/
#define CLNT_FREERES(rh,xres,resp) ((*(rh)->cl_ops->cl_freeres)(rh,xres,resp))
#define clnt_freeres(rh,xres,resp) ((*(rh)->cl_ops->cl_freeres)(rh,xres,resp))
/*
* bool_t
* CLNT_CONTROL(cl, request, info)
* CLIENT *cl;
* u_int request;
* char *info;
*/
#define CLNT_CONTROL(cl,rq,in) ((*(cl)->cl_ops->cl_control)(cl,rq,in))
#define clnt_control(cl,rq,in) ((*(cl)->cl_ops->cl_control)(cl,rq,in))
/*
* control operations that apply to both udp and tcp transports
*/
#define CLSET_TIMEOUT 1 /* set timeout (timeval) */
#define CLGET_TIMEOUT 2 /* get timeout (timeval) */
#define CLGET_SERVER_ADDR 3 /* get server's address (sockaddr) */
#define CLGET_FD 6 /* get connections file descriptor */
#define CLGET_SVC_ADDR 7 /* get server's address (netbuf) */
#define CLSET_FD_CLOSE 8 /* close fd while clnt_destroy */
#define CLSET_FD_NCLOSE 9 /* Do not close fd while clnt_destroy */
#define CLGET_XID 10 /* Get xid */
#define CLSET_XID 11 /* Set xid */
#define CLGET_VERS 12 /* Get version number */
#define CLSET_VERS 13 /* Set version number */
#define CLGET_PROG 14 /* Get program number */
#define CLSET_PROG 15 /* Set program number */
#define CLSET_SVC_ADDR 16 /* get server's address (netbuf) */
#define CLSET_PUSH_TIMOD 17 /* push timod if not already present */
#define CLSET_POP_TIMOD 18 /* pop timod */
/*
* Connectionless only control operations
*/
#define CLSET_RETRY_TIMEOUT 4 /* set retry timeout (timeval) */
#define CLGET_RETRY_TIMEOUT 5 /* get retry timeout (timeval) */
#define CLSET_ASYNC 19
#define CLSET_CONNECT 20 /* Use connect() for UDP. (int) */
/*
* void
* CLNT_DESTROY(rh);
* CLIENT *rh;
*/
#define CLNT_DESTROY(rh) ((*(rh)->cl_ops->cl_destroy)(rh))
#define clnt_destroy(rh) ((*(rh)->cl_ops->cl_destroy)(rh))
/*
* RPCTEST is a test program which is accessible on every rpc
* transport/port. It is used for testing, performance evaluation,
* and network administration.
*/
#define RPCTEST_PROGRAM ((rpcprog_t)1)
#define RPCTEST_VERSION ((rpcvers_t)1)
#define RPCTEST_NULL_PROC ((rpcproc_t)2)
#define RPCTEST_NULL_BATCH_PROC ((rpcproc_t)3)
/*
* By convention, procedure 0 takes null arguments and returns them
*/
#define NULLPROC ((rpcproc_t)0)
/*
* Below are the client handle creation routines for the various
* implementations of client side rpc. They can return NULL if a
* creation failure occurs.
*/
/*
* Generic client creation routine. Supported protocols are those that
* belong to the nettype namespace (/etc/netconfig).
*/
__BEGIN_DECLS
extern CLIENT *clnt_create(const char *, const rpcprog_t, const rpcvers_t,
const char *);
/*
*
* const char *hostname; -- hostname
* const rpcprog_t prog; -- program number
* const rpcvers_t vers; -- version number
* const char *nettype; -- network type
*/
/*
* Generic client creation routine. Just like clnt_create(), except
* it takes an additional timeout parameter.
*/
extern CLIENT * clnt_create_timed(const char *, const rpcprog_t,
const rpcvers_t, const char *, const struct timeval *);
/*
*
* const char *hostname; -- hostname
* const rpcprog_t prog; -- program number
* const rpcvers_t vers; -- version number
* const char *nettype; -- network type
* const struct timeval *tp; -- timeout
*/
/*
* Generic client creation routine. Supported protocols are which belong
* to the nettype name space.
*/
extern CLIENT *clnt_create_vers(const char *, const rpcprog_t, rpcvers_t *,
const rpcvers_t, const rpcvers_t,
const char *);
/*
* const char *host; -- hostname
* const rpcprog_t prog; -- program number
* rpcvers_t *vers_out; -- servers highest available version
* const rpcvers_t vers_low; -- low version number
* const rpcvers_t vers_high; -- high version number
* const char *nettype; -- network type
*/
/*
* Generic client creation routine. Supported protocols are which belong
* to the nettype name space.
*/
extern CLIENT * clnt_create_vers_timed(const char *, const rpcprog_t,
rpcvers_t *, const rpcvers_t, const rpcvers_t, const char *,
const struct timeval *);
/*
* const char *host; -- hostname
* const rpcprog_t prog; -- program number
* rpcvers_t *vers_out; -- servers highest available version
* const rpcvers_t vers_low; -- low version number
* const rpcvers_t vers_high; -- high version number
* const char *nettype; -- network type
* const struct timeval *tp -- timeout
*/
/*
* Generic client creation routine. It takes a netconfig structure
* instead of nettype
*/
extern CLIENT *clnt_tp_create(const char *, const rpcprog_t,
const rpcvers_t, const struct netconfig *);
/*
* const char *hostname; -- hostname
* const rpcprog_t prog; -- program number
* const rpcvers_t vers; -- version number
* const struct netconfig *netconf; -- network config structure
*/
/*
* Generic client creation routine. Just like clnt_tp_create(), except
* it takes an additional timeout parameter.
*/
extern CLIENT * clnt_tp_create_timed(const char *, const rpcprog_t,
const rpcvers_t, const struct netconfig *, const struct timeval *);
/*
* const char *hostname; -- hostname
* const rpcprog_t prog; -- program number
* const rpcvers_t vers; -- version number
* const struct netconfig *netconf; -- network config structure
* const struct timeval *tp -- timeout
*/
/*
* Generic TLI create routine. Only provided for compatibility.
*/
extern CLIENT *clnt_tli_create(const int, const struct netconfig *,
struct netbuf *, const rpcprog_t,
const rpcvers_t, const u_int, const u_int);
/*
* const register int fd; -- fd
* const struct netconfig *nconf; -- netconfig structure
* struct netbuf *svcaddr; -- servers address
* const u_long prog; -- program number
* const u_long vers; -- version number
* const u_int sendsz; -- send size
* const u_int recvsz; -- recv size
*/
/*
* Low level clnt create routine for connectionful transports, e.g. tcp.
*/
extern CLIENT *clnt_vc_create(const int, const struct netbuf *,
const rpcprog_t, const rpcvers_t,
u_int, u_int);
/*
* Added for compatibility to old rpc 4.0. Obsoleted by clnt_vc_create().
*/
extern CLIENT *clntunix_create(struct sockaddr_un *,
u_long, u_long, int *, u_int, u_int);
/*
* const int fd; -- open file descriptor
* const struct netbuf *svcaddr; -- servers address
* const rpcprog_t prog; -- program number
* const rpcvers_t vers; -- version number
* const u_int sendsz; -- buffer recv size
* const u_int recvsz; -- buffer send size
*/
/*
* Low level clnt create routine for connectionless transports, e.g. udp.
*/
extern CLIENT *clnt_dg_create(const int, const struct netbuf *,
const rpcprog_t, const rpcvers_t,
const u_int, const u_int);
/*
* const int fd; -- open file descriptor
* const struct netbuf *svcaddr; -- servers address
* const rpcprog_t program; -- program number
* const rpcvers_t version; -- version number
* const u_int sendsz; -- buffer recv size
* const u_int recvsz; -- buffer send size
*/
/*
* Memory based rpc (for speed check and testing)
* CLIENT *
* clnt_raw_create(prog, vers)
* u_long prog;
* u_long vers;
*/
extern CLIENT *clnt_raw_create(rpcprog_t, rpcvers_t);
__END_DECLS
/*
* Print why creation failed
*/
__BEGIN_DECLS
extern void clnt_pcreateerror(const char *); /* stderr */
extern char *clnt_spcreateerror(const char *); /* string */
__END_DECLS
/*
* Like clnt_perror(), but is more verbose in its output
*/
__BEGIN_DECLS
extern void clnt_perrno(enum clnt_stat); /* stderr */
extern char *clnt_sperrno(enum clnt_stat); /* string */
__END_DECLS
/*
* Print an English error message, given the client error code
*/
__BEGIN_DECLS
extern void clnt_perror(CLIENT *, const char *); /* stderr */
extern char *clnt_sperror(CLIENT *, const char *); /* string */
__END_DECLS
/*
* If a creation fails, the following allows the user to figure out why.
*/
struct rpc_createerr {
enum clnt_stat cf_stat;
struct rpc_err cf_error; /* useful when cf_stat == RPC_PMAPFAILURE */
};
__BEGIN_DECLS
extern struct rpc_createerr *__rpc_createerr(void);
__END_DECLS
#define rpc_createerr (*(__rpc_createerr()))
/*
* The simplified interface:
* enum clnt_stat
* rpc_call(host, prognum, versnum, procnum, inproc, in, outproc, out, nettype)
* const char *host;
* const rpcprog_t prognum;
* const rpcvers_t versnum;
* const rpcproc_t procnum;
* const xdrproc_t inproc, outproc;
* const char *in;
* char *out;
* const char *nettype;
*/
__BEGIN_DECLS
extern enum clnt_stat rpc_call(const char *, const rpcprog_t,
const rpcvers_t, const rpcproc_t,
const xdrproc_t, const char *,
const xdrproc_t, char *, const char *);
__END_DECLS
/*
* RPC broadcast interface
* The call is broadcasted to all locally connected nets.
*
* extern enum clnt_stat
* rpc_broadcast(prog, vers, proc, xargs, argsp, xresults, resultsp,
* eachresult, nettype)
* const rpcprog_t prog; -- program number
* const rpcvers_t vers; -- version number
* const rpcproc_t proc; -- procedure number
* const xdrproc_t xargs; -- xdr routine for args
* caddr_t argsp; -- pointer to args
* const xdrproc_t xresults; -- xdr routine for results
* caddr_t resultsp; -- pointer to results
* const resultproc_t eachresult; -- call with each result
* const char *nettype; -- Transport type
*
* For each valid response received, the procedure eachresult is called.
* Its form is:
* done = eachresult(resp, raddr, nconf)
* bool_t done;
* caddr_t resp;
* struct netbuf *raddr;
* struct netconfig *nconf;
* where resp points to the results of the call and raddr is the
* address if the responder to the broadcast. nconf is the transport
* on which the response was received.
*
* extern enum clnt_stat
* rpc_broadcast_exp(prog, vers, proc, xargs, argsp, xresults, resultsp,
* eachresult, inittime, waittime, nettype)
* const rpcprog_t prog; -- program number
* const rpcvers_t vers; -- version number
* const rpcproc_t proc; -- procedure number
* const xdrproc_t xargs; -- xdr routine for args
* caddr_t argsp; -- pointer to args
* const xdrproc_t xresults; -- xdr routine for results
* caddr_t resultsp; -- pointer to results
* const resultproc_t eachresult; -- call with each result
* const int inittime; -- how long to wait initially
* const int waittime; -- maximum time to wait
* const char *nettype; -- Transport type
*/
typedef bool_t (*resultproc_t)(caddr_t, ...);
__BEGIN_DECLS
extern enum clnt_stat rpc_broadcast(const rpcprog_t, const rpcvers_t,
const rpcproc_t, const xdrproc_t,
caddr_t, const xdrproc_t, caddr_t,
const resultproc_t, const char *);
extern enum clnt_stat rpc_broadcast_exp(const rpcprog_t, const rpcvers_t,
const rpcproc_t, const xdrproc_t,
caddr_t, const xdrproc_t, caddr_t,
const resultproc_t, const int,
const int, const char *);
__END_DECLS
/* For backward compatibility */
#include <rpc/clnt_soc.h>
#endif /* !_RPC_CLNT_H_ */
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