sunrpc/rpc/clnt.h

   1 /* @(#)clnt.h   2.1 88/07/29 4.0 RPCSRC; from 1.31 88/02/08 SMI*/
   2 /*
   3  * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
   4  * unrestricted use provided that this legend is included on all tape
   5  * media and as a part of the software program in whole or part.  Users
   6  * may copy or modify Sun RPC without charge, but are not authorized
   7  * to license or distribute it to anyone else except as part of a product or
   8  * program developed by the user.
   9  *
  10  * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
  11  * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
  12  * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
  13  *
  14  * Sun RPC is provided with no support and without any obligation on the
  15  * part of Sun Microsystems, Inc. to assist in its use, correction,
  16  * modification or enhancement.
  17  *
  18  * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
  19  * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
  20  * OR ANY PART THEREOF.
  21  *
  22  * In no event will Sun Microsystems, Inc. be liable for any lost revenue
  23  * or profits or other special, indirect and consequential damages, even if
  24  * Sun has been advised of the possibility of such damages.
  25  *
  26  * Sun Microsystems, Inc.
  27  * 2550 Garcia Avenue
  28  * Mountain View, California  94043
  29  */
  30
  31 /*
  32  * clnt.h - Client side remote procedure call interface.
  33  *
  34  * Copyright (C) 1984, Sun Microsystems, Inc.
  35  */
  36
  37 #ifndef _RPC_CLNT_H
  38 #define _RPC_CLNT_H     1
  39
  40 #include <features.h>
  41 #include <sys/types.h>
  42 #include <rpc/types.h>
  43 #include <rpc/auth.h>
  44 #include <sys/un.h>
  45
  46 __BEGIN_DECLS
  47
  48 /*
  49  * Rpc calls return an enum clnt_stat.  This should be looked at more,
  50  * since each implementation is required to live with this (implementation
  51  * independent) list of errors.
  52  */
  53 enum clnt_stat {
  54         RPC_SUCCESS=0,                  /* call succeeded */
  55         /*
  56          * local errors
  57          */
  58         RPC_CANTENCODEARGS=1,           /* can't encode arguments */
  59         RPC_CANTDECODERES=2,            /* can't decode results */
  60         RPC_CANTSEND=3,                 /* failure in sending call */
  61         RPC_CANTRECV=4,                 /* failure in receiving result */
  62         RPC_TIMEDOUT=5,                 /* call timed out */
  63         /*
  64          * remote errors
  65          */
  66         RPC_VERSMISMATCH=6,             /* rpc versions not compatible */
  67         RPC_AUTHERROR=7,                /* authentication error */
  68         RPC_PROGUNAVAIL=8,              /* program not available */
  69         RPC_PROGVERSMISMATCH=9,         /* program version mismatched */
  70         RPC_PROCUNAVAIL=10,             /* procedure unavailable */
  71         RPC_CANTDECODEARGS=11,          /* decode arguments error */
  72         RPC_SYSTEMERROR=12,             /* generic "other problem" */
  73         RPC_NOBROADCAST = 21,           /* Broadcasting not supported */
  74         /*
  75          * callrpc & clnt_create errors
  76          */
  77         RPC_UNKNOWNHOST=13,             /* unknown host name */
  78         RPC_UNKNOWNPROTO=17,            /* unknown protocol */
  79         RPC_UNKNOWNADDR = 19,           /* Remote address unknown */
  80
  81         /*
  82          * rpcbind errors
  83          */
  84         RPC_RPCBFAILURE=14,             /* portmapper failed in its call */
  85 #define RPC_PMAPFAILURE RPC_RPCBFAILURE
  86         RPC_PROGNOTREGISTERED=15,       /* remote program is not registered */
  87         RPC_N2AXLATEFAILURE = 22,       /* Name to addr translation failed */
  88         /*
  89          * unspecified error
  90          */
  91         RPC_FAILED=16,
  92         RPC_INTR=18,
  93         RPC_TLIERROR=20,
  94         RPC_UDERROR=23,
  95         /*
  96          * asynchronous errors
  97          */
  98         RPC_INPROGRESS = 24,
  99         RPC_STALERACHANDLE = 25
 100 };
 101
 102
 103 /*
 104  * Error info.
 105  */
 106 struct rpc_err {
 107   enum clnt_stat re_status;
 108   union {
 109     int RE_errno;               /* related system error */
 110     enum auth_stat RE_why;      /* why the auth error occurred */
 111     struct {
 112       u_long low;               /* lowest verion supported */
 113       u_long high;              /* highest verion supported */
 114     } RE_vers;
 115     struct {                    /* maybe meaningful if RPC_FAILED */
 116       long s1;
 117       long s2;
 118     } RE_lb;                    /* life boot & debugging only */
 119   } ru;
 120 #define re_errno        ru.RE_errno
 121 #define re_why          ru.RE_why
 122 #define re_vers         ru.RE_vers
 123 #define re_lb           ru.RE_lb
 124 };
 125
 126
 127 /*
 128  * Client rpc handle.
 129  * Created by individual implementations, see e.g. rpc_udp.c.
 130  * Client is responsible for initializing auth, see e.g. auth_none.c.
 131  */
 132 typedef struct CLIENT CLIENT;
 133 struct CLIENT {
 134   AUTH  *cl_auth;                /* authenticator */
 135   struct clnt_ops {
 136     enum clnt_stat (*cl_call) __PMT ((CLIENT *, u_long, xdrproc_t,
 137                                       caddr_t, xdrproc_t,
 138                                       caddr_t, struct timeval));
 139                                 /* call remote procedure */
 140     void (*cl_abort) __PMT ((void));  /* abort a call */
 141     void (*cl_geterr) __PMT ((CLIENT *, struct rpc_err *));
 142                                 /* get specific error code */
 143     bool_t (*cl_freeres) __PMT ((CLIENT *, xdrproc_t, caddr_t));
 144                                 /* frees results */
 145     void (*cl_destroy) __PMT ((CLIENT *)); /* destroy this structure */
 146     bool_t (*cl_control) __PMT ((CLIENT *, int, char *));
 147                                 /* the ioctl() of rpc */
 148   } *cl_ops;
 149   caddr_t cl_private;           /* private stuff */
 150 };
 151
 152
 153 /*
 154  * client side rpc interface ops
 155  *
 156  * Parameter types are:
 157  *
 158  */
 159
 160 /*
 161  * enum clnt_stat
 162  * CLNT_CALL(rh, proc, xargs, argsp, xres, resp, timeout)
 163  *      CLIENT *rh;
 164  *      u_long proc;
 165  *      xdrproc_t xargs;
 166  *      caddr_t argsp;
 167  *      xdrproc_t xres;
 168  *      caddr_t resp;
 169  *      struct timeval timeout;
 170  */
 171 #define CLNT_CALL(rh, proc, xargs, argsp, xres, resp, secs)     \
 172         ((*(rh)->cl_ops->cl_call)(rh, proc, xargs, argsp, xres, resp, secs))
 173 #define clnt_call(rh, proc, xargs, argsp, xres, resp, secs)     \
 174         ((*(rh)->cl_ops->cl_call)(rh, proc, xargs, argsp, xres, resp, secs))
 175
 176 /*
 177  * void
 178  * CLNT_ABORT(rh);
 179  *      CLIENT *rh;
 180  */
 181 #define CLNT_ABORT(rh)  ((*(rh)->cl_ops->cl_abort)(rh))
 182 #define clnt_abort(rh)  ((*(rh)->cl_ops->cl_abort)(rh))
 183
 184 /*
 185  * struct rpc_err
 186  * CLNT_GETERR(rh);
 187  *      CLIENT *rh;
 188  */
 189 #define CLNT_GETERR(rh,errp)    ((*(rh)->cl_ops->cl_geterr)(rh, errp))
 190 #define clnt_geterr(rh,errp)    ((*(rh)->cl_ops->cl_geterr)(rh, errp))
 191
 192
 193 /*
 194  * bool_t
 195  * CLNT_FREERES(rh, xres, resp);
 196  *      CLIENT *rh;
 197  *      xdrproc_t xres;
 198  *      caddr_t resp;
 199  */
 200 #define CLNT_FREERES(rh,xres,resp) ((*(rh)->cl_ops->cl_freeres)(rh,xres,resp))
 201 #define clnt_freeres(rh,xres,resp) ((*(rh)->cl_ops->cl_freeres)(rh,xres,resp))
 202
 203 /*
 204  * bool_t
 205  * CLNT_CONTROL(cl, request, info)
 206  *      CLIENT *cl;
 207  *      u_int request;
 208  *      char *info;
 209  */
 210 #define CLNT_CONTROL(cl,rq,in) ((*(cl)->cl_ops->cl_control)(cl,rq,in))
 211 #define clnt_control(cl,rq,in) ((*(cl)->cl_ops->cl_control)(cl,rq,in))
 212
 213 /*
 214  * control operations that apply to all transports
 215  *
 216  * Note: options marked XXX are no-ops in this implementation of RPC.
 217  * The are present in TI-RPC but can't be implemented here since they
 218  * depend on the presence of STREAMS/TLI, which we don't have.
 219  */
 220 #define CLSET_TIMEOUT        1    /* set timeout (timeval) */
 221 #define CLGET_TIMEOUT        2    /* get timeout (timeval) */
 222 #define CLGET_SERVER_ADDR    3    /* get server's address (sockaddr) */
 223 #define CLGET_FD             6    /* get connections file descriptor */
 224 #define CLGET_SVC_ADDR       7    /* get server's address (netbuf)      XXX */
 225 #define CLSET_FD_CLOSE       8    /* close fd while clnt_destroy */
 226 #define CLSET_FD_NCLOSE      9    /* Do not close fd while clnt_destroy*/
 227 #define CLGET_XID            10   /* Get xid */
 228 #define CLSET_XID            11   /* Set xid */
 229 #define CLGET_VERS           12   /* Get version number */
 230 #define CLSET_VERS           13   /* Set version number */
 231 #define CLGET_PROG           14   /* Get program number */
 232 #define CLSET_PROG           15   /* Set program number */
 233 #define CLSET_SVC_ADDR       16   /* get server's address (netbuf)      XXX */
 234 #define CLSET_PUSH_TIMOD     17   /* push timod if not already present  XXX */
 235 #define CLSET_POP_TIMOD      18   /* pop timod                          XXX */
 236 /*
 237  * Connectionless only control operations
 238  */
 239 #define CLSET_RETRY_TIMEOUT     4       /* set retry timeout (timeval) */
 240 #define CLGET_RETRY_TIMEOUT     5       /* get retry timeout (timeval) */
 241
 242 /*
 243  * void
 244  * CLNT_DESTROY(rh);
 245  *      CLIENT *rh;
 246  */
 247 #define CLNT_DESTROY(rh)        ((*(rh)->cl_ops->cl_destroy)(rh))
 248 #define clnt_destroy(rh)        ((*(rh)->cl_ops->cl_destroy)(rh))
 249
 250
 251 /*
 252  * RPCTEST is a test program which is accessible on every rpc
 253  * transport/port.  It is used for testing, performance evaluation,
 254  * and network administration.
 255  */
 256
 257 #define RPCTEST_PROGRAM         ((u_long)1)
 258 #define RPCTEST_VERSION         ((u_long)1)
 259 #define RPCTEST_NULL_PROC       ((u_long)2)
 260 #define RPCTEST_NULL_BATCH_PROC ((u_long)3)
 261
 262 /*
 263  * By convention, procedure 0 takes null arguments and returns them
 264  */
 265
 266 #define NULLPROC ((u_long)0)
 267
 268 /*
 269  * Below are the client handle creation routines for the various
 270  * implementations of client side rpc.  They can return NULL if a
 271  * creation failure occurs.
 272  */
 273
 274 /*
 275  * Memory based rpc (for speed check and testing)
 276  * CLIENT *
 277  * clntraw_create(prog, vers)
 278  *      u_long prog;
 279  *      u_long vers;
 280  */
 281 extern CLIENT *clntraw_create __P ((__const u_long __prog,
 282                                     __const u_long __vers));
 283
 284
 285 /*
 286  * Generic client creation routine. Supported protocols are "udp", "tcp" and
 287  * "unix"
 288  * CLIENT *
 289  * clnt_create(host, prog, vers, prot)
 290  *      char *host;     -- hostname
 291  *      u_long prog;    -- program number
 292  *      u_ong vers;     -- version number
 293  *      char *prot;     -- protocol
 294  */
 295 extern CLIENT *clnt_create __P ((__const char *__host, __const u_long __prog,
 296                                  __const u_long __vers, __const char *__prot));
 297
 298
 299 /*
 300  * TCP based rpc
 301  * CLIENT *
 302  * clnttcp_create(raddr, prog, vers, sockp, sendsz, recvsz)
 303  *      struct sockaddr_in *raddr;
 304  *      u_long prog;
 305  *      u_long version;
 306  *      register int *sockp;
 307  *      u_int sendsz;
 308  *      u_int recvsz;
 309  */
 310 extern CLIENT *clnttcp_create __P ((struct sockaddr_in *__raddr,
 311                                     u_long __prog, u_long __version,
 312                                     int *__sockp, u_int __sendsz,
 313                                     u_int __recvsz));
 314
 315 /*
 316  * UDP based rpc.
 317  * CLIENT *
 318  * clntudp_create(raddr, program, version, wait, sockp)
 319  *      struct sockaddr_in *raddr;
 320  *      u_long program;
 321  *      u_long version;
 322  *      struct timeval wait_resend;
 323  *      int *sockp;
 324  *
 325  * Same as above, but you specify max packet sizes.
 326  * CLIENT *
 327  * clntudp_bufcreate(raddr, program, version, wait, sockp, sendsz, recvsz)
 328  *      struct sockaddr_in *raddr;
 329  *      u_long program;
 330  *      u_long version;
 331  *      struct timeval wait_resend;
 332  *      int *sockp;
 333  *      u_int sendsz;
 334  *      u_int recvsz;
 335  */
 336 extern CLIENT *clntudp_create __P ((struct sockaddr_in *__raddr,
 337                                     u_long __program, u_long __version,
 338                                     struct timeval __wait_resend,
 339                                     int *__sockp));
 340 extern CLIENT *clntudp_bufcreate __P ((struct sockaddr_in *__raddr,
 341                                        u_long __program, u_long __version,
 342                                        struct timeval __wait_resend,
 343                                        int *__sockp, u_int __sendsz,
 344                                        u_int __recvsz));
 345
 346
 347 /*
 348  * AF_UNIX based rpc
 349  * CLIENT *
 350  * clntunix_create(raddr, prog, vers, sockp, sendsz, recvsz)
 351  *      struct sockaddr_un *raddr;
 352  *      u_long prog;
 353  *      u_long version;
 354  *      register int *sockp;
 355  *      u_int sendsz;
 356  *      u_int recvsz;
 357  */
 358 extern CLIENT *clntunix_create  __P ((struct sockaddr_un *__raddr,
 359                                       u_long __program, u_long __version,
 360                                       int *__sockp, u_int __sendsz,
 361                                       u_int __recvsz));
 362
 363
 364 extern int callrpc __P ((__const char *__host, __const u_long __prognum,
 365                          __const u_long __versnum, __const u_long __procnum,
 366                          __const xdrproc_t __inproc, __const char *__in,
 367                          __const xdrproc_t __outproc, char *__out));
 368 extern int _rpc_dtablesize __P ((void));
 369
 370 /*
 371  * Print why creation failed
 372  */
 373 extern void clnt_pcreateerror __P ((__const char *__msg));      /* stderr */
 374 extern char *clnt_spcreateerror __P ((__const char *__msg));    /* string */
 375
 376 /*
 377  * Like clnt_perror(), but is more verbose in its output
 378  */
 379 extern void clnt_perrno __P ((enum clnt_stat __num));   /* stderr */
 380
 381 /*
 382  * Print an English error message, given the client error code
 383  */
 384 extern void clnt_perror __P ((CLIENT *__clnt, __const char *__msg));
 385                                                         /* stderr */
 386 extern char *clnt_sperror __P ((CLIENT *__clnt, __const char *__msg));
 387                                                         /* string */
 388
 389 /*
 390  * If a creation fails, the following allows the user to figure out why.
 391  */
 392 struct rpc_createerr {
 393         enum clnt_stat cf_stat;
 394         struct rpc_err cf_error; /* useful when cf_stat == RPC_PMAPFAILURE */
 395 };
 396
 397 extern struct rpc_createerr rpc_createerr;
 398
 399
 400
 401 /*
 402  * Copy error message to buffer.
 403  */
 404 extern char *clnt_sperrno __P ((enum clnt_stat __num)); /* string */
 405
 406 /*
 407  * get the port number on the host for the rpc program,version and proto
 408  */
 409 extern int getrpcport __P ((__const char * __host, u_long __prognum,
 410                            u_long __versnum, u_int proto));
 411
 412 /*
 413  * get the local host's IP address without consulting
 414  * name service library functions
 415  */
 416 extern void get_myaddress __P ((struct sockaddr_in *));
 417
 418 #define UDPMSGSIZE      8800    /* rpc imposed limit on udp msg size */
 419 #define RPCSMALLMSGSIZE 400     /* a more reasonable packet size */
 420
 421 __END_DECLS
 422
 423 #endif /* rpc/clnt.h */