The Design and Implementation of the FreeBSD Operating System, Second Edition
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FreeBSD/Linux Kernel Cross Reference
sys/rpc/clnt.h

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    1 /*      $NetBSD: clnt.h,v 1.14 2000/06/02 22:57:55 fvdl Exp $   */
    2 
    3 /*
    4  * The contents of this file are subject to the Sun Standards
    5  * License Version 1.0 the (the "License";) You may not use
    6  * this file except in compliance with the License.  You may
    7  * obtain a copy of the License at lib/libc/rpc/LICENSE
    8  *
    9  * Software distributed under the License is distributed on
   10  * an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either
   11  * express or implied.  See the License for the specific
   12  * language governing rights and limitations under the License.
   13  *
   14  * The Original Code is Copyright 1998 by Sun Microsystems, Inc
   15  *
   16  * The Initial Developer of the Original Code is:  Sun
   17  * Microsystems, Inc.
   18  *
   19  * All Rights Reserved.
   20  *
   21  * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
   22  * unrestricted use provided that this legend is included on all tape
   23  * media and as a part of the software program in whole or part.  Users
   24  * may copy or modify Sun RPC without charge, but are not authorized
   25  * to license or distribute it to anyone else except as part of a product or
   26  * program developed by the user.
   27  *
   28  * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
   29  * WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   30  * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
   31  *
   32  * Sun RPC is provided with no support and without any obligation on the
   33  * part of Sun Microsystems, Inc. to assist in its use, correction,
   34  * modification or enhancement.
   35  *
   36  * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
   37  * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
   38  * OR ANY PART THEREOF.
   39  *
   40  * In no event will Sun Microsystems, Inc. be liable for any lost revenue
   41  * or profits or other special, indirect and consequential damages, even if
   42  * Sun has been advised of the possibility of such damages.
   43  *
   44  * Sun Microsystems, Inc.
   45  * 2550 Garcia Avenue
   46  * Mountain View, California  94043
   47  *
   48  *      from: @(#)clnt.h 1.31 94/04/29 SMI
   49  *      from: @(#)clnt.h        2.1 88/07/29 4.0 RPCSRC
   50  * $FreeBSD: releng/10.0/sys/rpc/clnt.h 244008 2012-12-08 00:29:16Z rmacklem $
   51  */
   52 
   53 /*
   54  * clnt.h - Client side remote procedure call interface.
   55  *
   56  * Copyright (c) 1986-1991,1994-1999 by Sun Microsystems, Inc.
   57  * All rights reserved.
   58  */
   59 
   60 #ifndef _RPC_CLNT_H_
   61 #define _RPC_CLNT_H_
   62 #include <rpc/clnt_stat.h>
   63 #include <sys/cdefs.h>
   64 #ifdef _KERNEL
   65 #include <sys/refcount.h>
   66 #include <rpc/netconfig.h>
   67 #else
   68 #include <netconfig.h>
   69 #endif
   70 #include <sys/un.h>
   71 
   72 /*
   73  * Well-known IPV6 RPC broadcast address.
   74  */
   75 #define RPCB_MULTICAST_ADDR "ff02::202"
   76 
   77 /*
   78  * the following errors are in general unrecoverable.  The caller
   79  * should give up rather than retry.
   80  */
   81 #define IS_UNRECOVERABLE_RPC(s) (((s) == RPC_AUTHERROR) || \
   82         ((s) == RPC_CANTENCODEARGS) || \
   83         ((s) == RPC_CANTDECODERES) || \
   84         ((s) == RPC_VERSMISMATCH) || \
   85         ((s) == RPC_PROCUNAVAIL) || \
   86         ((s) == RPC_PROGUNAVAIL) || \
   87         ((s) == RPC_PROGVERSMISMATCH) || \
   88         ((s) == RPC_CANTDECODEARGS))
   89 
   90 /*
   91  * Error info.
   92  */
   93 struct rpc_err {
   94         enum clnt_stat re_status;
   95         union {
   96                 int RE_errno;           /* related system error */
   97                 enum auth_stat RE_why;  /* why the auth error occurred */
   98                 struct {
   99                         rpcvers_t low;  /* lowest version supported */
  100                         rpcvers_t high; /* highest version supported */
  101                 } RE_vers;
  102                 struct {                /* maybe meaningful if RPC_FAILED */
  103                         int32_t s1;
  104                         int32_t s2;
  105                 } RE_lb;                /* life boot & debugging only */
  106         } ru;
  107 #define re_errno        ru.RE_errno
  108 #define re_why          ru.RE_why
  109 #define re_vers         ru.RE_vers
  110 #define re_lb           ru.RE_lb
  111 };
  112 
  113 #ifdef _KERNEL
  114 /*
  115  * Functions of this type may be used to receive notification when RPC
  116  * calls have to be re-transmitted etc.
  117  */
  118 typedef void rpc_feedback(int cmd, int procnum, void *);
  119 
  120 /*
  121  * Timers used for the pseudo-transport protocol when using datagrams
  122  */
  123 struct rpc_timers {
  124         u_short         rt_srtt;        /* smoothed round-trip time */
  125         u_short         rt_deviate;     /* estimated deviation */
  126         u_long          rt_rtxcur;      /* current (backed-off) rto */
  127 };
  128 
  129 /*
  130  * A structure used with CLNT_CALL_EXT to pass extra information used
  131  * while processing an RPC call.
  132  */
  133 struct rpc_callextra {
  134         AUTH            *rc_auth;       /* auth handle to use for this call */
  135         rpc_feedback    *rc_feedback;   /* callback for retransmits etc. */
  136         void            *rc_feedback_arg; /* argument for callback */
  137         struct rpc_timers *rc_timers;     /* optional RTT timers */
  138         struct rpc_err  rc_err;         /* detailed call status */
  139 };
  140 #endif
  141 
  142 /*
  143  * Client rpc handle.
  144  * Created by individual implementations
  145  * Client is responsible for initializing auth, see e.g. auth_none.c.
  146  */
  147 typedef struct __rpc_client {
  148 #ifdef _KERNEL
  149         volatile u_int cl_refs;                 /* reference count */
  150         AUTH    *cl_auth;                       /* authenticator */
  151         struct clnt_ops {
  152                 /* call remote procedure */
  153                 enum clnt_stat  (*cl_call)(struct __rpc_client *,
  154                     struct rpc_callextra *, rpcproc_t,
  155                     struct mbuf *, struct mbuf **, struct timeval);
  156                 /* abort a call */
  157                 void            (*cl_abort)(struct __rpc_client *);
  158                 /* get specific error code */
  159                 void            (*cl_geterr)(struct __rpc_client *,
  160                                         struct rpc_err *);
  161                 /* frees results */
  162                 bool_t          (*cl_freeres)(struct __rpc_client *,
  163                                         xdrproc_t, void *);
  164                 /* close the connection and terminate pending RPCs */
  165                 void            (*cl_close)(struct __rpc_client *);
  166                 /* destroy this structure */
  167                 void            (*cl_destroy)(struct __rpc_client *);
  168                 /* the ioctl() of rpc */
  169                 bool_t          (*cl_control)(struct __rpc_client *, u_int,
  170                                     void *);
  171         } *cl_ops;
  172 #else
  173         AUTH    *cl_auth;                       /* authenticator */
  174         struct clnt_ops {
  175                 /* call remote procedure */
  176                 enum clnt_stat  (*cl_call)(struct __rpc_client *,
  177                     rpcproc_t, xdrproc_t, void *, xdrproc_t,
  178                     void *, struct timeval);
  179                 /* abort a call */
  180                 void            (*cl_abort)(struct __rpc_client *);
  181                 /* get specific error code */
  182                 void            (*cl_geterr)(struct __rpc_client *,
  183                                         struct rpc_err *);
  184                 /* frees results */
  185                 bool_t          (*cl_freeres)(struct __rpc_client *,
  186                                         xdrproc_t, void *);
  187                 /* destroy this structure */
  188                 void            (*cl_destroy)(struct __rpc_client *);
  189                 /* the ioctl() of rpc */
  190                 bool_t          (*cl_control)(struct __rpc_client *, u_int,
  191                                     void *);
  192         } *cl_ops;
  193 #endif
  194         void                    *cl_private;    /* private stuff */
  195         char                    *cl_netid;      /* network token */
  196         char                    *cl_tp;         /* device name */
  197 } CLIENT;
  198 
  199 /*      
  200  * Feedback values used for possible congestion and rate control
  201  */
  202 #define FEEDBACK_OK             1       /* no retransmits */    
  203 #define FEEDBACK_REXMIT1        2       /* first retransmit */
  204 #define FEEDBACK_REXMIT2        3       /* second and subsequent retransmit */
  205 #define FEEDBACK_RECONNECT      4       /* client reconnect */
  206 
  207 /* Used to set version of portmapper used in broadcast */
  208   
  209 #define CLCR_SET_LOWVERS        3
  210 #define CLCR_GET_LOWVERS        4
  211  
  212 #define RPCSMALLMSGSIZE 400     /* a more reasonable packet size */
  213 
  214 /*
  215  * client side rpc interface ops
  216  *
  217  * Parameter types are:
  218  *
  219  */
  220 
  221 #ifdef _KERNEL
  222 #define CLNT_ACQUIRE(rh)                        \
  223         refcount_acquire(&(rh)->cl_refs)
  224 #define CLNT_RELEASE(rh)                        \
  225         if (refcount_release(&(rh)->cl_refs))   \
  226                 CLNT_DESTROY(rh)
  227 
  228 /*
  229  * void
  230  * CLNT_CLOSE(rh);
  231  *      CLIENT *rh;
  232  */
  233 #define CLNT_CLOSE(rh)  ((*(rh)->cl_ops->cl_close)(rh))
  234 
  235 enum clnt_stat clnt_call_private(CLIENT *, struct rpc_callextra *, rpcproc_t,
  236     xdrproc_t, void *, xdrproc_t, void *, struct timeval);
  237 
  238 /*
  239  * enum clnt_stat
  240  * CLNT_CALL_MBUF(rh, ext, proc, mreq, mrepp, timeout)
  241  *      CLIENT *rh;
  242  *      struct rpc_callextra *ext;
  243  *      rpcproc_t proc;
  244  *      struct mbuf *mreq;
  245  *      struct mbuf **mrepp;
  246  *      struct timeval timeout;
  247  *
  248  * Call arguments in mreq which is consumed by the call (even if there
  249  * is an error). Results returned in *mrepp.
  250  */
  251 #define CLNT_CALL_MBUF(rh, ext, proc, mreq, mrepp, secs)        \
  252         ((*(rh)->cl_ops->cl_call)(rh, ext, proc, mreq, mrepp, secs))
  253 
  254 /*
  255  * enum clnt_stat
  256  * CLNT_CALL_EXT(rh, ext, proc, xargs, argsp, xres, resp, timeout)
  257  *      CLIENT *rh;
  258  *      struct rpc_callextra *ext;
  259  *      rpcproc_t proc;
  260  *      xdrproc_t xargs;
  261  *      void *argsp;
  262  *      xdrproc_t xres;
  263  *      void *resp;
  264  *      struct timeval timeout;
  265  */
  266 #define CLNT_CALL_EXT(rh, ext, proc, xargs, argsp, xres, resp, secs)    \
  267         clnt_call_private(rh, ext, proc, xargs,                         \
  268                 argsp, xres, resp, secs)
  269 #endif
  270 
  271 /*
  272  * enum clnt_stat
  273  * CLNT_CALL(rh, proc, xargs, argsp, xres, resp, timeout)
  274  *      CLIENT *rh;
  275  *      rpcproc_t proc;
  276  *      xdrproc_t xargs;
  277  *      void *argsp;
  278  *      xdrproc_t xres;
  279  *      void *resp;
  280  *      struct timeval timeout;
  281  */
  282 #ifdef _KERNEL
  283 #define CLNT_CALL(rh, proc, xargs, argsp, xres, resp, secs)     \
  284         clnt_call_private(rh, NULL, proc, xargs,                \
  285                 argsp, xres, resp, secs)
  286 #define clnt_call(rh, proc, xargs, argsp, xres, resp, secs)     \
  287         clnt_call_private(rh, NULL, proc, xargs,                \
  288                 argsp, xres, resp, secs)
  289 #else
  290 #define CLNT_CALL(rh, proc, xargs, argsp, xres, resp, secs)             \
  291         ((*(rh)->cl_ops->cl_call)(rh, proc, xargs,      \
  292                 argsp, xres, resp, secs))
  293 #define clnt_call(rh, proc, xargs, argsp, xres, resp, secs)             \
  294         ((*(rh)->cl_ops->cl_call)(rh, proc, xargs,      \
  295                 argsp, xres, resp, secs))
  296 #endif
  297 
  298 /*
  299  * void
  300  * CLNT_ABORT(rh);
  301  *      CLIENT *rh;
  302  */
  303 #define CLNT_ABORT(rh)  ((*(rh)->cl_ops->cl_abort)(rh))
  304 #define clnt_abort(rh)  ((*(rh)->cl_ops->cl_abort)(rh))
  305 
  306 /*
  307  * struct rpc_err
  308  * CLNT_GETERR(rh);
  309  *      CLIENT *rh;
  310  */
  311 #define CLNT_GETERR(rh,errp)    ((*(rh)->cl_ops->cl_geterr)(rh, errp))
  312 #define clnt_geterr(rh,errp)    ((*(rh)->cl_ops->cl_geterr)(rh, errp))
  313 
  314 
  315 /*
  316  * bool_t
  317  * CLNT_FREERES(rh, xres, resp);
  318  *      CLIENT *rh;
  319  *      xdrproc_t xres;
  320  *      void *resp;
  321  */
  322 #define CLNT_FREERES(rh,xres,resp) ((*(rh)->cl_ops->cl_freeres)(rh,xres,resp))
  323 #define clnt_freeres(rh,xres,resp) ((*(rh)->cl_ops->cl_freeres)(rh,xres,resp))
  324 
  325 /*
  326  * bool_t
  327  * CLNT_CONTROL(cl, request, info)
  328  *      CLIENT *cl;
  329  *      u_int request;
  330  *      char *info;
  331  */
  332 #define CLNT_CONTROL(cl,rq,in) ((*(cl)->cl_ops->cl_control)(cl,rq,in))
  333 #define clnt_control(cl,rq,in) ((*(cl)->cl_ops->cl_control)(cl,rq,in))
  334 
  335 /*
  336  * control operations that apply to both udp and tcp transports
  337  */
  338 #define CLSET_TIMEOUT           1       /* set timeout (timeval) */
  339 #define CLGET_TIMEOUT           2       /* get timeout (timeval) */
  340 #define CLGET_SERVER_ADDR       3       /* get server's address (sockaddr) */
  341 #define CLGET_FD                6       /* get connections file descriptor */
  342 #define CLGET_SVC_ADDR          7       /* get server's address (netbuf) */
  343 #define CLSET_FD_CLOSE          8       /* close fd while clnt_destroy */
  344 #define CLSET_FD_NCLOSE         9       /* Do not close fd while clnt_destroy */
  345 #define CLGET_XID               10      /* Get xid */
  346 #define CLSET_XID               11      /* Set xid */
  347 #define CLGET_VERS              12      /* Get version number */
  348 #define CLSET_VERS              13      /* Set version number */
  349 #define CLGET_PROG              14      /* Get program number */
  350 #define CLSET_PROG              15      /* Set program number */
  351 #define CLSET_SVC_ADDR          16      /* get server's address (netbuf) */
  352 #define CLSET_PUSH_TIMOD        17      /* push timod if not already present */
  353 #define CLSET_POP_TIMOD         18      /* pop timod */
  354 /*
  355  * Connectionless only control operations
  356  */
  357 #define CLSET_RETRY_TIMEOUT 4   /* set retry timeout (timeval) */
  358 #define CLGET_RETRY_TIMEOUT 5   /* get retry timeout (timeval) */
  359 #define CLSET_ASYNC             19
  360 #define CLSET_CONNECT           20      /* Use connect() for UDP. (int) */
  361 
  362 #ifdef _KERNEL
  363 /*
  364  * Kernel control operations. The default msleep string is "rpcrecv",
  365  * and sleeps are non-interruptible by default.
  366  */
  367 #define CLSET_WAITCHAN          21      /* set string to use in msleep call */
  368 #define CLGET_WAITCHAN          22      /* get string used in msleep call */
  369 #define CLSET_INTERRUPTIBLE     23      /* set interruptible flag */
  370 #define CLGET_INTERRUPTIBLE     24      /* set interruptible flag */
  371 #define CLSET_RETRIES           25      /* set retry count for reconnect */
  372 #define CLGET_RETRIES           26      /* get retry count for reconnect */
  373 #define CLSET_PRIVPORT          27      /* set privileged source port flag */
  374 #define CLGET_PRIVPORT          28      /* get privileged source port flag */
  375 #define CLSET_BACKCHANNEL       29      /* set backchannel for socket */
  376 #endif
  377 
  378 
  379 /*
  380  * void
  381  * CLNT_DESTROY(rh);
  382  *      CLIENT *rh;
  383  */
  384 #define CLNT_DESTROY(rh)        ((*(rh)->cl_ops->cl_destroy)(rh))
  385 #define clnt_destroy(rh)        ((*(rh)->cl_ops->cl_destroy)(rh))
  386 
  387 
  388 /*
  389  * RPCTEST is a test program which is accessible on every rpc
  390  * transport/port.  It is used for testing, performance evaluation,
  391  * and network administration.
  392  */
  393 
  394 #define RPCTEST_PROGRAM         ((rpcprog_t)1)
  395 #define RPCTEST_VERSION         ((rpcvers_t)1)
  396 #define RPCTEST_NULL_PROC       ((rpcproc_t)2)
  397 #define RPCTEST_NULL_BATCH_PROC ((rpcproc_t)3)
  398 
  399 /*
  400  * By convention, procedure 0 takes null arguments and returns them
  401  */
  402 
  403 #define NULLPROC ((rpcproc_t)0)
  404 
  405 /*
  406  * Below are the client handle creation routines for the various
  407  * implementations of client side rpc.  They can return NULL if a
  408  * creation failure occurs.
  409  */
  410 
  411 /*
  412  * Generic client creation routine. Supported protocols are those that
  413  * belong to the nettype namespace (/etc/netconfig).
  414  */
  415 __BEGIN_DECLS
  416 #ifdef _KERNEL
  417 
  418 /*
  419  *      struct socket *so;                      -- socket
  420  *      struct sockaddr *svcaddr;               -- servers address
  421  *      rpcprog_t prog;                         -- program number
  422  *      rpcvers_t vers;                         -- version number
  423  *      size_t sendsz;                          -- buffer recv size
  424  *      size_t recvsz;                          -- buffer send size
  425  */
  426 extern CLIENT *clnt_dg_create(struct socket *so,
  427     struct sockaddr *svcaddr, rpcprog_t program, rpcvers_t version,
  428     size_t sendsz, size_t recvsz);
  429 
  430 /*
  431  *      struct socket *so;                      -- socket
  432  *      struct sockaddr *svcaddr;               -- servers address
  433  *      rpcprog_t prog;                         -- program number
  434  *      rpcvers_t vers;                         -- version number
  435  *      size_t sendsz;                          -- buffer recv size
  436  *      size_t recvsz;                          -- buffer send size
  437  *      int intrflag;                           -- is it interruptible
  438  */
  439 extern CLIENT *clnt_vc_create(struct socket *so,
  440     struct sockaddr *svcaddr, rpcprog_t program, rpcvers_t version,
  441     size_t sendsz, size_t recvsz, int intrflag);
  442 
  443 /*
  444  *      struct netconfig *nconf;                -- network type
  445  *      struct sockaddr *svcaddr;               -- servers address
  446  *      rpcprog_t prog;                         -- program number
  447  *      rpcvers_t vers;                         -- version number
  448  *      size_t sendsz;                          -- buffer recv size
  449  *      size_t recvsz;                          -- buffer send size
  450  */
  451 extern CLIENT *clnt_reconnect_create(struct netconfig *nconf,
  452     struct sockaddr *svcaddr, rpcprog_t program, rpcvers_t version,
  453     size_t sendsz, size_t recvsz);
  454 
  455 #else
  456 
  457 extern CLIENT *clnt_create(const char *, const rpcprog_t, const rpcvers_t,
  458                            const char *);
  459 /*
  460  *
  461  *      const char *hostname;                   -- hostname
  462  *      const rpcprog_t prog;                   -- program number
  463  *      const rpcvers_t vers;                   -- version number
  464  *      const char *nettype;                    -- network type
  465  */
  466 
  467  /*
  468  * Generic client creation routine. Just like clnt_create(), except
  469  * it takes an additional timeout parameter.
  470  */
  471 extern CLIENT * clnt_create_timed(const char *, const rpcprog_t,
  472         const rpcvers_t, const char *, const struct timeval *);
  473 /*
  474  *
  475  *      const char *hostname;                   -- hostname
  476  *      const rpcprog_t prog;                   -- program number
  477  *      const rpcvers_t vers;                   -- version number
  478  *      const char *nettype;                    -- network type
  479  *      const struct timeval *tp;               -- timeout
  480  */
  481 
  482 /*
  483  * Generic client creation routine. Supported protocols are which belong
  484  * to the nettype name space.
  485  */
  486 extern CLIENT *clnt_create_vers(const char *, const rpcprog_t, rpcvers_t *,
  487                                 const rpcvers_t, const rpcvers_t,
  488                                 const char *);
  489 /*
  490  *      const char *host;               -- hostname
  491  *      const rpcprog_t prog;           -- program number
  492  *      rpcvers_t *vers_out;            -- servers highest available version
  493  *      const rpcvers_t vers_low;       -- low version number
  494  *      const rpcvers_t vers_high;      -- high version number
  495  *      const char *nettype;            -- network type
  496  */
  497 
  498 /*
  499  * Generic client creation routine. Supported protocols are which belong
  500  * to the nettype name space.
  501  */
  502 extern CLIENT * clnt_create_vers_timed(const char *, const rpcprog_t,
  503         rpcvers_t *, const rpcvers_t, const rpcvers_t, const char *,
  504         const struct timeval *);
  505 /*
  506  *      const char *host;               -- hostname
  507  *      const rpcprog_t prog;           -- program number
  508  *      rpcvers_t *vers_out;            -- servers highest available version
  509  *      const rpcvers_t vers_low;       -- low version number
  510  *      const rpcvers_t vers_high;      -- high version number
  511  *      const char *nettype;            -- network type
  512  *      const struct timeval *tp        -- timeout
  513  */
  514 
  515 /*
  516  * Generic client creation routine. It takes a netconfig structure
  517  * instead of nettype
  518  */
  519 extern CLIENT *clnt_tp_create(const char *, const rpcprog_t,
  520                               const rpcvers_t, const struct netconfig *);
  521 /*
  522  *      const char *hostname;                   -- hostname
  523  *      const rpcprog_t prog;                   -- program number
  524  *      const rpcvers_t vers;                   -- version number
  525  *      const struct netconfig *netconf;        -- network config structure
  526  */
  527 
  528 /*
  529  * Generic client creation routine. Just like clnt_tp_create(), except
  530  * it takes an additional timeout parameter.
  531  */
  532 extern CLIENT * clnt_tp_create_timed(const char *, const rpcprog_t,
  533         const rpcvers_t, const struct netconfig *, const struct timeval *);
  534 /*
  535  *      const char *hostname;                   -- hostname
  536  *      const rpcprog_t prog;                   -- program number
  537  *      const rpcvers_t vers;                   -- version number
  538  *      const struct netconfig *netconf;        -- network config structure
  539  *      const struct timeval *tp                -- timeout
  540  */
  541 
  542 /*
  543  * Generic TLI create routine. Only provided for compatibility.
  544  */
  545 
  546 extern CLIENT *clnt_tli_create(const int, const struct netconfig *,
  547                                struct netbuf *, const rpcprog_t,
  548                                const rpcvers_t, const u_int, const u_int);
  549 /*
  550  *      const register int fd;          -- fd
  551  *      const struct netconfig *nconf;  -- netconfig structure
  552  *      struct netbuf *svcaddr;         -- servers address
  553  *      const u_long prog;                      -- program number
  554  *      const u_long vers;                      -- version number
  555  *      const u_int sendsz;                     -- send size
  556  *      const u_int recvsz;                     -- recv size
  557  */
  558 
  559 /*
  560  * Low level clnt create routine for connectionful transports, e.g. tcp.
  561  */
  562 extern CLIENT *clnt_vc_create(const int, const struct netbuf *,
  563                               const rpcprog_t, const rpcvers_t,
  564                               u_int, u_int);
  565 /*
  566  * Added for compatibility to old rpc 4.0. Obsoleted by clnt_vc_create().
  567  */
  568 extern CLIENT *clntunix_create(struct sockaddr_un *,
  569                                u_long, u_long, int *, u_int, u_int);
  570 /*
  571  *      const int fd;                           -- open file descriptor
  572  *      const struct netbuf *svcaddr;           -- servers address
  573  *      const rpcprog_t prog;                   -- program number
  574  *      const rpcvers_t vers;                   -- version number
  575  *      const u_int sendsz;                     -- buffer recv size
  576  *      const u_int recvsz;                     -- buffer send size
  577  */
  578 
  579 /*
  580  * Low level clnt create routine for connectionless transports, e.g. udp.
  581  */
  582 extern CLIENT *clnt_dg_create(const int, const struct netbuf *,
  583                               const rpcprog_t, const rpcvers_t,
  584                               const u_int, const u_int);
  585 /*
  586  *      const int fd;                           -- open file descriptor
  587  *      const struct netbuf *svcaddr;           -- servers address
  588  *      const rpcprog_t program;                -- program number
  589  *      const rpcvers_t version;                -- version number
  590  *      const u_int sendsz;                     -- buffer recv size
  591  *      const u_int recvsz;                     -- buffer send size
  592  */
  593 
  594 /*
  595  * Memory based rpc (for speed check and testing)
  596  * CLIENT *
  597  * clnt_raw_create(prog, vers)
  598  *      u_long prog;
  599  *      u_long vers;
  600  */
  601 extern CLIENT *clnt_raw_create(rpcprog_t, rpcvers_t);
  602 #endif
  603 
  604 __END_DECLS
  605 
  606 
  607 /*
  608  * Print why creation failed
  609  */
  610 __BEGIN_DECLS
  611 extern void clnt_pcreateerror(const char *);                    /* stderr */
  612 extern char *clnt_spcreateerror(const char *);                  /* string */
  613 __END_DECLS
  614 
  615 /*
  616  * Like clnt_perror(), but is more verbose in its output
  617  */
  618 __BEGIN_DECLS
  619 extern void clnt_perrno(enum clnt_stat);                /* stderr */
  620 extern char *clnt_sperrno(enum clnt_stat);              /* string */
  621 __END_DECLS
  622 
  623 /*
  624  * Print an English error message, given the client error code
  625  */
  626 __BEGIN_DECLS
  627 extern void clnt_perror(CLIENT *, const char *);                /* stderr */
  628 extern char *clnt_sperror(CLIENT *, const char *);              /* string */
  629 __END_DECLS
  630 
  631 
  632 /*
  633  * If a creation fails, the following allows the user to figure out why.
  634  */
  635 struct rpc_createerr {
  636         enum clnt_stat cf_stat;
  637         struct rpc_err cf_error; /* useful when cf_stat == RPC_PMAPFAILURE */
  638 };
  639 
  640 #ifdef _KERNEL
  641 extern struct rpc_createerr rpc_createerr;
  642 #else
  643 __BEGIN_DECLS
  644 extern struct rpc_createerr     *__rpc_createerr(void);
  645 __END_DECLS
  646 #define rpc_createerr           (*(__rpc_createerr()))
  647 #endif
  648 
  649 #ifndef _KERNEL
  650 /*
  651  * The simplified interface:
  652  * enum clnt_stat
  653  * rpc_call(host, prognum, versnum, procnum, inproc, in, outproc, out, nettype)
  654  *      const char *host;
  655  *      const rpcprog_t prognum;
  656  *      const rpcvers_t versnum;
  657  *      const rpcproc_t procnum;
  658  *      const xdrproc_t inproc, outproc;
  659  *      const char *in;
  660  *      char *out;
  661  *      const char *nettype;
  662  */
  663 __BEGIN_DECLS
  664 extern enum clnt_stat rpc_call(const char *, const rpcprog_t,
  665                                const rpcvers_t, const rpcproc_t,
  666                                const xdrproc_t, const char *,
  667                                const xdrproc_t, char *, const char *);
  668 __END_DECLS
  669 
  670 /*
  671  * RPC broadcast interface
  672  * The call is broadcasted to all locally connected nets.
  673  *
  674  * extern enum clnt_stat
  675  * rpc_broadcast(prog, vers, proc, xargs, argsp, xresults, resultsp,
  676  *                      eachresult, nettype)
  677  *      const rpcprog_t         prog;           -- program number
  678  *      const rpcvers_t         vers;           -- version number
  679  *      const rpcproc_t         proc;           -- procedure number
  680  *      const xdrproc_t xargs;          -- xdr routine for args
  681  *      caddr_t         argsp;          -- pointer to args
  682  *      const xdrproc_t xresults;       -- xdr routine for results
  683  *      caddr_t         resultsp;       -- pointer to results
  684  *      const resultproc_t      eachresult;     -- call with each result
  685  *      const char              *nettype;       -- Transport type
  686  *
  687  * For each valid response received, the procedure eachresult is called.
  688  * Its form is:
  689  *              done = eachresult(resp, raddr, nconf)
  690  *                      bool_t done;
  691  *                      caddr_t resp;
  692  *                      struct netbuf *raddr;
  693  *                      struct netconfig *nconf;
  694  * where resp points to the results of the call and raddr is the
  695  * address if the responder to the broadcast.  nconf is the transport
  696  * on which the response was received.
  697  *
  698  * extern enum clnt_stat
  699  * rpc_broadcast_exp(prog, vers, proc, xargs, argsp, xresults, resultsp,
  700  *                      eachresult, inittime, waittime, nettype)
  701  *      const rpcprog_t         prog;           -- program number
  702  *      const rpcvers_t         vers;           -- version number
  703  *      const rpcproc_t         proc;           -- procedure number
  704  *      const xdrproc_t xargs;          -- xdr routine for args
  705  *      caddr_t         argsp;          -- pointer to args
  706  *      const xdrproc_t xresults;       -- xdr routine for results
  707  *      caddr_t         resultsp;       -- pointer to results
  708  *      const resultproc_t      eachresult;     -- call with each result
  709  *      const int               inittime;       -- how long to wait initially
  710  *      const int               waittime;       -- maximum time to wait
  711  *      const char              *nettype;       -- Transport type
  712  */
  713 
  714 typedef bool_t (*resultproc_t)(caddr_t, ...);
  715 
  716 __BEGIN_DECLS
  717 extern enum clnt_stat rpc_broadcast(const rpcprog_t, const rpcvers_t,
  718                                     const rpcproc_t, const xdrproc_t,
  719                                     caddr_t, const xdrproc_t, caddr_t,
  720                                     const resultproc_t, const char *);
  721 extern enum clnt_stat rpc_broadcast_exp(const rpcprog_t, const rpcvers_t,
  722                                         const rpcproc_t, const xdrproc_t,
  723                                         caddr_t, const xdrproc_t, caddr_t,
  724                                         const resultproc_t, const int,
  725                                         const int, const char *);
  726 __END_DECLS
  727 
  728 /* For backward compatibility */
  729 #include <rpc/clnt_soc.h>
  730 #endif
  731 
  732 #endif /* !_RPC_CLNT_H_ */

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