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clnt.h

/* @(#)clnt.h     2.1 88/07/29 4.0 RPCSRC; from 1.31 88/02/08 SMI*/
/*
 * 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
 */

/*
 * clnt.h - Client side remote procedure call interface.
 *
 * Copyright (C) 1984, Sun Microsystems, Inc.
 */

#ifndef _RPC_CLNT_H
#define _RPC_CLNT_H     1

#include <features.h>
#include <sys/types.h>
#include <rpc/types.h>
#include <rpc/auth.h>
#include <sys/un.h>

__BEGIN_DECLS

/*
 * Rpc calls return an enum clnt_stat.  This should be looked at more,
 * since each implementation is required to live with this (implementation
 * independent) list of errors.
 */
enum clnt_stat {
      RPC_SUCCESS=0,                /* call succeeded */
      /*
       * local errors
       */
      RPC_CANTENCODEARGS=1,         /* can't encode arguments */
      RPC_CANTDECODERES=2,          /* can't decode results */
      RPC_CANTSEND=3,               /* failure in sending call */
      RPC_CANTRECV=4,               /* failure in receiving result */
      RPC_TIMEDOUT=5,               /* call timed out */
      /*
       * remote errors
       */
      RPC_VERSMISMATCH=6,           /* rpc versions not compatible */
      RPC_AUTHERROR=7,        /* authentication error */
      RPC_PROGUNAVAIL=8,            /* program not available */
      RPC_PROGVERSMISMATCH=9,       /* program version mismatched */
      RPC_PROCUNAVAIL=10,           /* procedure unavailable */
      RPC_CANTDECODEARGS=11,        /* decode arguments error */
      RPC_SYSTEMERROR=12,           /* generic "other problem" */
      RPC_NOBROADCAST = 21,         /* Broadcasting not supported */
      /*
       * callrpc & clnt_create errors
       */
      RPC_UNKNOWNHOST=13,           /* unknown host name */
      RPC_UNKNOWNPROTO=17,          /* unknown protocol */
      RPC_UNKNOWNADDR = 19,         /* Remote address unknown */

      /*
       * rpcbind errors
       */
      RPC_RPCBFAILURE=14,           /* portmapper failed in its call */
#define RPC_PMAPFAILURE RPC_RPCBFAILURE
      RPC_PROGNOTREGISTERED=15,     /* remote program is not registered */
      RPC_N2AXLATEFAILURE = 22,     /* Name to addr translation failed */
      /*
       * unspecified error
       */
      RPC_FAILED=16,
      RPC_INTR=18,
      RPC_TLIERROR=20,
      RPC_UDERROR=23,
        /*
         * asynchronous errors
         */
        RPC_INPROGRESS = 24,
        RPC_STALERACHANDLE = 25
};


/*
 * 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 {
      u_long low;       /* lowest verion supported */
      u_long high;            /* highest verion supported */
    } RE_vers;
    struct {                  /* maybe meaningful if RPC_FAILED */
      long s1;
      long 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, see e.g. rpc_udp.c.
 * Client is responsible for initializing auth, see e.g. auth_none.c.
 */
typedef struct CLIENT CLIENT;
struct CLIENT {
  AUTH      *cl_auth;          /* authenticator */
  struct clnt_ops {
    enum clnt_stat (*cl_call) (CLIENT *, u_long, xdrproc_t, caddr_t, xdrproc_t,
                         caddr_t, struct timeval);
                              /* call remote procedure */
    void (*cl_abort) (void);  /* abort a call */
    void (*cl_geterr) (CLIENT *, struct rpc_err *);
                        /* get specific error code */
    bool_t (*cl_freeres) (CLIENT *, xdrproc_t, caddr_t);
                        /* frees results */
    void (*cl_destroy) (CLIENT *); /* destroy this structure */
    bool_t (*cl_control) (CLIENT *, int, char *);
                        /* the ioctl() of rpc */
  } *cl_ops;
  caddr_t cl_private;         /* private stuff */
};


/*
 * client side rpc interface ops
 *
 * Parameter types are:
 *
 */

/*
 * enum clnt_stat
 * CLNT_CALL(rh, proc, xargs, argsp, xres, resp, timeout)
 *    CLIENT *rh;
 *    u_long proc;
 *    xdrproc_t xargs;
 *    caddr_t argsp;
 *    xdrproc_t xres;
 *    caddr_t 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;
 *    caddr_t 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 all transports
 *
 * Note: options marked XXX are no-ops in this implementation of RPC.
 * The are present in TI-RPC but can't be implemented here since they
 * depend on the presence of STREAMS/TLI, which we don't have.
 */
#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)      XXX */
#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)      XXX */
#define CLSET_PUSH_TIMOD     17   /* push timod if not already present  XXX */
#define CLSET_POP_TIMOD      18   /* pop timod                          XXX */
/*
 * Connectionless only control operations
 */
#define CLSET_RETRY_TIMEOUT   4     /* set retry timeout (timeval) */
#define CLGET_RETRY_TIMEOUT   5     /* get retry timeout (timeval) */

/*
 * 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       ((u_long)1)
#define RPCTEST_VERSION       ((u_long)1)
#define RPCTEST_NULL_PROC     ((u_long)2)
#define RPCTEST_NULL_BATCH_PROC     ((u_long)3)

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

#define NULLPROC ((u_long)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.
 */

/*
 * Memory based rpc (for speed check and testing)
 * CLIENT *
 * clntraw_create(prog, vers)
 *    u_long prog;
 *    u_long vers;
 */
extern CLIENT *clntraw_create (__const u_long __prog, __const u_long __vers)
     __THROW;


/*
 * Generic client creation routine. Supported protocols are "udp", "tcp" and
 * "unix"
 * CLIENT *
 * clnt_create(host, prog, vers, prot)
 *    char *host;       -- hostname
 *    u_long prog;      -- program number
 *    u_ong vers; -- version number
 *    char *prot; -- protocol
 */
extern CLIENT *clnt_create (__const char *__host, __const u_long __prog,
                      __const u_long __vers, __const char *__prot)
     __THROW;


/*
 * TCP based rpc
 * CLIENT *
 * clnttcp_create(raddr, prog, vers, sockp, sendsz, recvsz)
 *    struct sockaddr_in *raddr;
 *    u_long prog;
 *    u_long version;
 *    register int *sockp;
 *    u_int sendsz;
 *    u_int recvsz;
 */
extern CLIENT *clnttcp_create (struct sockaddr_in *__raddr, u_long __prog,
                         u_long __version, int *__sockp, u_int __sendsz,
                         u_int __recvsz) __THROW;

/*
 * UDP based rpc.
 * CLIENT *
 * clntudp_create(raddr, program, version, wait, sockp)
 *    struct sockaddr_in *raddr;
 *    u_long program;
 *    u_long version;
 *    struct timeval wait_resend;
 *    int *sockp;
 *
 * Same as above, but you specify max packet sizes.
 * CLIENT *
 * clntudp_bufcreate(raddr, program, version, wait, sockp, sendsz, recvsz)
 *    struct sockaddr_in *raddr;
 *    u_long program;
 *    u_long version;
 *    struct timeval wait_resend;
 *    int *sockp;
 *    u_int sendsz;
 *    u_int recvsz;
 */
extern CLIENT *clntudp_create (struct sockaddr_in *__raddr, u_long __program,
                         u_long __version, struct timeval __wait_resend,
                         int *__sockp) __THROW;
extern CLIENT *clntudp_bufcreate (struct sockaddr_in *__raddr,
                          u_long __program, u_long __version,
                          struct timeval __wait_resend, int *__sockp,
                          u_int __sendsz, u_int __recvsz) __THROW;




/*
 * AF_UNIX based rpc
 * CLIENT *
 * clntunix_create(raddr, prog, vers, sockp, sendsz, recvsz)
 *      struct sockaddr_un *raddr;
 *      u_long prog;
 *      u_long version;
 *      register int *sockp;
 *      u_int sendsz;
 *      u_int recvsz;
 */
extern CLIENT *clntunix_create  (struct sockaddr_un *__raddr, u_long __program,
                         u_long __version, int *__sockp,
                         u_int __sendsz, u_int __recvsz) __THROW;


extern int callrpc (__const char *__host, __const u_long __prognum,
                __const u_long __versnum, __const u_long __procnum,
                __const xdrproc_t __inproc, __const char *__in,
                __const xdrproc_t __outproc, char *__out) __THROW;
extern int _rpc_dtablesize (void) __THROW;

/*
 * Print why creation failed
 */
extern void clnt_pcreateerror (__const char *__msg) __THROW;      /* stderr */
extern char *clnt_spcreateerror(__const char *__msg) __THROW;     /* string */

/*
 * Like clnt_perror(), but is more verbose in its output
 */
extern void clnt_perrno (enum clnt_stat __num) __THROW;           /* stderr */

/*
 * Print an English error message, given the client error code
 */
extern void clnt_perror (CLIENT *__clnt, __const char *__msg) __THROW;
                                          /* stderr */
extern char *clnt_sperror (CLIENT *__clnt, __const char *__msg) __THROW;
                                          /* string */

/*
 * 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 */
};

extern struct rpc_createerr rpc_createerr;



/*
 * Copy error message to buffer.
 */
extern char *clnt_sperrno (enum clnt_stat __num) __THROW;   /* string */

/*
 * get the port number on the host for the rpc program,version and proto
 */
extern int getrpcport (__const char * __host, u_long __prognum,
                   u_long __versnum, u_int proto) __THROW;

/*
 * get the local host's IP address without consulting
 * name service library functions
 */
extern void get_myaddress (struct sockaddr_in *) __THROW;

#define UDPMSGSIZE      8800  /* rpc imposed limit on udp msg size */
#define RPCSMALLMSGSIZE 400   /* a more reasonable packet size */

__END_DECLS

#endif /* rpc/clnt.h */

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