clnt.h

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

/*
 * Copyright (c) 2009, Sun Microsystems, 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 Sun Microsystems, 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
 * $FreeBSD: src/include/rpc/clnt.h,v 1.21 2003/01/24 01:47:55 fjoe Exp $
 */

/*
 * clnt.h - Client side remote procedure call interface.
 *
 * Copyright (c) 1986-1991,1994-1999 by Sun Microsystems, Inc.
 * All rights reserved.
 */

/* NFSv4.1 client for Windows
 * Copyright © 2012 The Regents of the University of Michigan
 *
 * Olga Kornievskaia <aglo@umich.edu>
 * Casey Bodley <cbodley@umich.edu>
 *
 * This library is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation; either version 2.1 of the License, or (at
 * your option) any later version.
 *
 * This library is distributed in the hope that it will be useful, but
 * without any warranty; without even the implied warranty of merchantability
 * or fitness for a particular purpose.  See the GNU Lesser General Public
 * License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this library; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 */

#ifndef _TIRPC_CLNT_H_
#define _TIRPC_CLNT_H_

//#include <rpc/clnt_stat.h>
#include "clnt_stat.h"
#include <rpc/auth.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 */
    HANDLE          cb_thread;
    int             (*cb_xdr)(void *, void *);
    int             (*cb_fn)(void *, void *, void **);
    void            *cb_args;
    bool_t          shutdown;
} CLIENT;

typedef struct __cb_req {
    u_int32_t   rq_prog;
    u_int32_t   rq_vers;
    u_int32_t   rq_proc;
    void        *xdr;
} cb_req;

/*
 * 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 SOCKET, const struct netconfig *,
                   struct netbuf *, const rpcprog_t,
                   const rpcvers_t, const u_int, const u_int,
                   int (*cb_xdr)(void *, void *),
                   int (*cb)(void *, void *, void **), void *args);
/*
 *  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.
 */
#ifndef __REACTOS__
extern CLIENT *clnt_vc_create(const SOCKET, const struct netbuf *,
                  const rpcprog_t, const rpcvers_t,
                  u_int, u_int, int (*cb_xdr)(void *, void *),
                  int (*cb)(void *, void *, void **), void *args);
#else
extern CLIENT *clnt_vc_create(const int, const struct netbuf *,
                  const rpcprog_t, const rpcvers_t,
                  u_int, u_int, int (*cb_xdr)(void *, void *),
                  int (*cb)(void *, void *, void **), void *args);
#endif

/*
 * 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 SOCKET, 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 get_rpc_createerr() (*(__rpc_createerr()))
#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 /* !_TIRPC_CLNT_H_ */