clnt.h revision 100451
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: head/include/rpc/clnt.h 100451 2002-07-21 20:37:58Z robert $ 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#include <netconfig.h> 65#include <sys/un.h> 66 67/* 68 * Well-known IPV6 RPC broadcast address. 69 */ 70#define RPCB_MULTICAST_ADDR "ff02::202" 71 72/* 73 * the following errors are in general unrecoverable. The caller 74 * should give up rather than retry. 75 */ 76#define IS_UNRECOVERABLE_RPC(s) (((s) == RPC_AUTHERROR) || \ 77 ((s) == RPC_CANTENCODEARGS) || \ 78 ((s) == RPC_CANTDECODERES) || \ 79 ((s) == RPC_VERSMISMATCH) || \ 80 ((s) == RPC_PROCUNAVAIL) || \ 81 ((s) == RPC_PROGUNAVAIL) || \ 82 ((s) == RPC_PROGVERSMISMATCH) || \ 83 ((s) == RPC_CANTDECODEARGS)) 84 85/* 86 * Error info. 87 */ 88struct rpc_err { 89 enum clnt_stat re_status; 90 union { 91 int RE_errno; /* related system error */ 92 enum auth_stat RE_why; /* why the auth error occurred */ 93 struct { 94 rpcvers_t low; /* lowest version supported */ 95 rpcvers_t high; /* highest version supported */ 96 } RE_vers; 97 struct { /* maybe meaningful if RPC_FAILED */ 98 int32_t s1; 99 int32_t s2; 100 } RE_lb; /* life boot & debugging only */ 101 } ru; 102#define re_errno ru.RE_errno 103#define re_why ru.RE_why 104#define re_vers ru.RE_vers 105#define re_lb ru.RE_lb 106}; 107 108 109/* 110 * Client rpc handle. 111 * Created by individual implementations 112 * Client is responsible for initializing auth, see e.g. auth_none.c. 113 */ 114typedef struct __rpc_client { 115 AUTH *cl_auth; /* authenticator */ 116 struct clnt_ops { 117 /* call remote procedure */ 118 enum clnt_stat (*cl_call)(struct __rpc_client *, 119 rpcproc_t, xdrproc_t, void *, xdrproc_t, 120 void *, struct timeval); 121 /* abort a call */ 122 void (*cl_abort)(struct __rpc_client *); 123 /* get specific error code */ 124 void (*cl_geterr)(struct __rpc_client *, 125 struct rpc_err *); 126 /* frees results */ 127 bool_t (*cl_freeres)(struct __rpc_client *, 128 xdrproc_t, void *); 129 /* destroy this structure */ 130 void (*cl_destroy)(struct __rpc_client *); 131 /* the ioctl() of rpc */ 132 bool_t (*cl_control)(struct __rpc_client *, u_int, 133 void *); 134 } *cl_ops; 135 void *cl_private; /* private stuff */ 136 char *cl_netid; /* network token */ 137 char *cl_tp; /* device name */ 138} CLIENT; 139 140 141/* 142 * Timers used for the pseudo-transport protocol when using datagrams 143 */ 144struct rpc_timers { 145 u_short rt_srtt; /* smoothed round-trip time */ 146 u_short rt_deviate; /* estimated deviation */ 147 u_long rt_rtxcur; /* current (backed-off) rto */ 148}; 149 150/* 151 * Feedback values used for possible congestion and rate control 152 */ 153#define FEEDBACK_REXMIT1 1 /* first retransmit */ 154#define FEEDBACK_OK 2 /* no retransmits */ 155 156/* Used to set version of portmapper used in broadcast */ 157 158#define CLCR_SET_LOWVERS 3 159#define CLCR_GET_LOWVERS 4 160 161#define RPCSMALLMSGSIZE 400 /* a more reasonable packet size */ 162 163/* 164 * client side rpc interface ops 165 * 166 * Parameter types are: 167 * 168 */ 169 170/* 171 * enum clnt_stat 172 * CLNT_CALL(rh, proc, xargs, argsp, xres, resp, timeout) 173 * CLIENT *rh; 174 * rpcproc_t proc; 175 * xdrproc_t xargs; 176 * void *argsp; 177 * xdrproc_t xres; 178 * void *resp; 179 * struct timeval timeout; 180 */ 181#define CLNT_CALL(rh, proc, xargs, argsp, xres, resp, secs) \ 182 ((*(rh)->cl_ops->cl_call)(rh, proc, xargs, \ 183 argsp, xres, resp, secs)) 184#define clnt_call(rh, proc, xargs, argsp, xres, resp, secs) \ 185 ((*(rh)->cl_ops->cl_call)(rh, proc, xargs, \ 186 argsp, xres, resp, secs)) 187 188/* 189 * void 190 * CLNT_ABORT(rh); 191 * CLIENT *rh; 192 */ 193#define CLNT_ABORT(rh) ((*(rh)->cl_ops->cl_abort)(rh)) 194#define clnt_abort(rh) ((*(rh)->cl_ops->cl_abort)(rh)) 195 196/* 197 * struct rpc_err 198 * CLNT_GETERR(rh); 199 * CLIENT *rh; 200 */ 201#define CLNT_GETERR(rh,errp) ((*(rh)->cl_ops->cl_geterr)(rh, errp)) 202#define clnt_geterr(rh,errp) ((*(rh)->cl_ops->cl_geterr)(rh, errp)) 203 204 205/* 206 * bool_t 207 * CLNT_FREERES(rh, xres, resp); 208 * CLIENT *rh; 209 * xdrproc_t xres; 210 * void *resp; 211 */ 212#define CLNT_FREERES(rh,xres,resp) ((*(rh)->cl_ops->cl_freeres)(rh,xres,resp)) 213#define clnt_freeres(rh,xres,resp) ((*(rh)->cl_ops->cl_freeres)(rh,xres,resp)) 214 215/* 216 * bool_t 217 * CLNT_CONTROL(cl, request, info) 218 * CLIENT *cl; 219 * u_int request; 220 * char *info; 221 */ 222#define CLNT_CONTROL(cl,rq,in) ((*(cl)->cl_ops->cl_control)(cl,rq,in)) 223#define clnt_control(cl,rq,in) ((*(cl)->cl_ops->cl_control)(cl,rq,in)) 224 225/* 226 * control operations that apply to both udp and tcp transports 227 */ 228#define CLSET_TIMEOUT 1 /* set timeout (timeval) */ 229#define CLGET_TIMEOUT 2 /* get timeout (timeval) */ 230#define CLGET_SERVER_ADDR 3 /* get server's address (sockaddr) */ 231#define CLGET_FD 6 /* get connections file descriptor */ 232#define CLGET_SVC_ADDR 7 /* get server's address (netbuf) */ 233#define CLSET_FD_CLOSE 8 /* close fd while clnt_destroy */ 234#define CLSET_FD_NCLOSE 9 /* Do not close fd while clnt_destroy */ 235#define CLGET_XID 10 /* Get xid */ 236#define CLSET_XID 11 /* Set xid */ 237#define CLGET_VERS 12 /* Get version number */ 238#define CLSET_VERS 13 /* Set version number */ 239#define CLGET_PROG 14 /* Get program number */ 240#define CLSET_PROG 15 /* Set program number */ 241#define CLSET_SVC_ADDR 16 /* get server's address (netbuf) */ 242#define CLSET_PUSH_TIMOD 17 /* push timod if not already present */ 243#define CLSET_POP_TIMOD 18 /* pop timod */ 244/* 245 * Connectionless only control operations 246 */ 247#define CLSET_RETRY_TIMEOUT 4 /* set retry timeout (timeval) */ 248#define CLGET_RETRY_TIMEOUT 5 /* get retry timeout (timeval) */ 249#define CLSET_ASYNC 19 250#define CLSET_CONNECT 20 /* Use connect() for UDP. (int) */ 251 252/* 253 * void 254 * CLNT_DESTROY(rh); 255 * CLIENT *rh; 256 */ 257#define CLNT_DESTROY(rh) ((*(rh)->cl_ops->cl_destroy)(rh)) 258#define clnt_destroy(rh) ((*(rh)->cl_ops->cl_destroy)(rh)) 259 260 261/* 262 * RPCTEST is a test program which is accessible on every rpc 263 * transport/port. It is used for testing, performance evaluation, 264 * and network administration. 265 */ 266 267#define RPCTEST_PROGRAM ((rpcprog_t)1) 268#define RPCTEST_VERSION ((rpcvers_t)1) 269#define RPCTEST_NULL_PROC ((rpcproc_t)2) 270#define RPCTEST_NULL_BATCH_PROC ((rpcproc_t)3) 271 272/* 273 * By convention, procedure 0 takes null arguments and returns them 274 */ 275 276#define NULLPROC ((rpcproc_t)0) 277 278/* 279 * Below are the client handle creation routines for the various 280 * implementations of client side rpc. They can return NULL if a 281 * creation failure occurs. 282 */ 283 284/* 285 * Generic client creation routine. Supported protocols are those that 286 * belong to the nettype namespace (/etc/netconfig). 287 */ 288__BEGIN_DECLS 289extern CLIENT *clnt_create(const char *, const rpcprog_t, const rpcvers_t, 290 const char *); 291/* 292 * 293 * const char *hostname; -- hostname 294 * const rpcprog_t prog; -- program number 295 * const rpcvers_t vers; -- version number 296 * const char *nettype; -- network type 297 */ 298 299 /* 300 * Generic client creation routine. Just like clnt_create(), except 301 * it takes an additional timeout parameter. 302 */ 303extern CLIENT * clnt_create_timed(const char *, const rpcprog_t, 304 const rpcvers_t, const char *, const struct timeval *); 305/* 306 * 307 * const char *hostname; -- hostname 308 * const rpcprog_t prog; -- program number 309 * const rpcvers_t vers; -- version number 310 * const char *nettype; -- network type 311 * const struct timeval *tp; -- timeout 312 */ 313 314/* 315 * Generic client creation routine. Supported protocols are which belong 316 * to the nettype name space. 317 */ 318extern CLIENT *clnt_create_vers(const char *, const rpcprog_t, rpcvers_t *, 319 const rpcvers_t, const rpcvers_t, 320 const char *); 321/* 322 * const char *host; -- hostname 323 * const rpcprog_t prog; -- program number 324 * rpcvers_t *vers_out; -- servers highest available version 325 * const rpcvers_t vers_low; -- low version number 326 * const rpcvers_t vers_high; -- high version number 327 * const char *nettype; -- network type 328 */ 329 330/* 331 * Generic client creation routine. Supported protocols are which belong 332 * to the nettype name space. 333 */ 334extern CLIENT * clnt_create_vers_timed(const char *, const rpcprog_t, 335 rpcvers_t *, const rpcvers_t, const rpcvers_t, const char *, 336 const struct timeval *); 337/* 338 * const char *host; -- hostname 339 * const rpcprog_t prog; -- program number 340 * rpcvers_t *vers_out; -- servers highest available version 341 * const rpcvers_t vers_low; -- low version number 342 * const rpcvers_t vers_high; -- high version number 343 * const char *nettype; -- network type 344 * const struct timeval *tp -- timeout 345 */ 346 347/* 348 * Generic client creation routine. It takes a netconfig structure 349 * instead of nettype 350 */ 351extern CLIENT *clnt_tp_create(const char *, const rpcprog_t, 352 const rpcvers_t, const struct netconfig *); 353/* 354 * const char *hostname; -- hostname 355 * const rpcprog_t prog; -- program number 356 * const rpcvers_t vers; -- version number 357 * const struct netconfig *netconf; -- network config structure 358 */ 359 360/* 361 * Generic client creation routine. Just like clnt_tp_create(), except 362 * it takes an additional timeout parameter. 363 */ 364extern CLIENT * clnt_tp_create_timed(const char *, const rpcprog_t, 365 const rpcvers_t, const struct netconfig *, const struct timeval *); 366/* 367 * const char *hostname; -- hostname 368 * const rpcprog_t prog; -- program number 369 * const rpcvers_t vers; -- version number 370 * const struct netconfig *netconf; -- network config structure 371 * const struct timeval *tp -- timeout 372 */ 373 374/* 375 * Generic TLI create routine. Only provided for compatibility. 376 */ 377 378extern CLIENT *clnt_tli_create(const int, const struct netconfig *, 379 struct netbuf *, const rpcprog_t, 380 const rpcvers_t, const u_int, const u_int); 381/* 382 * const register int fd; -- fd 383 * const struct netconfig *nconf; -- netconfig structure 384 * struct netbuf *svcaddr; -- servers address 385 * const u_long prog; -- program number 386 * const u_long vers; -- version number 387 * const u_int sendsz; -- send size 388 * const u_int recvsz; -- recv size 389 */ 390 391/* 392 * Low level clnt create routine for connectionful transports, e.g. tcp. 393 */ 394extern CLIENT *clnt_vc_create(const int, const struct netbuf *, 395 const rpcprog_t, const rpcvers_t, 396 u_int, u_int); 397/* 398 * Added for compatibility to old rpc 4.0. Obsoleted by clnt_vc_create(). 399 */ 400extern CLIENT *clntunix_create(struct sockaddr_un *, 401 u_long, u_long, int *, u_int, u_int); 402/* 403 * const int fd; -- open file descriptor 404 * const struct netbuf *svcaddr; -- servers address 405 * const rpcprog_t prog; -- program number 406 * const rpcvers_t vers; -- version number 407 * const u_int sendsz; -- buffer recv size 408 * const u_int recvsz; -- buffer send size 409 */ 410 411/* 412 * Low level clnt create routine for connectionless transports, e.g. udp. 413 */ 414extern CLIENT *clnt_dg_create(const int, const struct netbuf *, 415 const rpcprog_t, const rpcvers_t, 416 const u_int, const u_int); 417/* 418 * const int fd; -- open file descriptor 419 * const struct netbuf *svcaddr; -- servers address 420 * const rpcprog_t program; -- program number 421 * const rpcvers_t version; -- version number 422 * const u_int sendsz; -- buffer recv size 423 * const u_int recvsz; -- buffer send size 424 */ 425 426/* 427 * Memory based rpc (for speed check and testing) 428 * CLIENT * 429 * clnt_raw_create(prog, vers) 430 * u_long prog; 431 * u_long vers; 432 */ 433extern CLIENT *clnt_raw_create(rpcprog_t, rpcvers_t); 434 435__END_DECLS 436 437 438/* 439 * Print why creation failed 440 */ 441__BEGIN_DECLS 442extern void clnt_pcreateerror(const char *); /* stderr */ 443extern char *clnt_spcreateerror(const char *); /* string */ 444__END_DECLS 445 446/* 447 * Like clnt_perror(), but is more verbose in its output 448 */ 449__BEGIN_DECLS 450extern void clnt_perrno(enum clnt_stat); /* stderr */ 451extern char *clnt_sperrno(enum clnt_stat); /* string */ 452__END_DECLS 453 454/* 455 * Print an English error message, given the client error code 456 */ 457__BEGIN_DECLS 458extern void clnt_perror(CLIENT *, const char *); /* stderr */ 459extern char *clnt_sperror(CLIENT *, const char *); /* string */ 460__END_DECLS 461 462 463/* 464 * If a creation fails, the following allows the user to figure out why. 465 */ 466struct rpc_createerr { 467 enum clnt_stat cf_stat; 468 struct rpc_err cf_error; /* useful when cf_stat == RPC_PMAPFAILURE */ 469}; 470 471#ifdef _THREAD_SAFE 472__BEGIN_DECLS 473extern struct rpc_createerr *__rpc_createerr(void); 474__END_DECLS 475#define rpc_createerr (*(__rpc_createerr())) 476#else 477extern struct rpc_createerr rpc_createerr; 478#endif /* _THREAD_SAFE */ 479 480/* 481 * The simplified interface: 482 * enum clnt_stat 483 * rpc_call(host, prognum, versnum, procnum, inproc, in, outproc, out, nettype) 484 * const char *host; 485 * const rpcprog_t prognum; 486 * const rpcvers_t versnum; 487 * const rpcproc_t procnum; 488 * const xdrproc_t inproc, outproc; 489 * const char *in; 490 * char *out; 491 * const char *nettype; 492 */ 493__BEGIN_DECLS 494extern enum clnt_stat rpc_call(const char *, const rpcprog_t, 495 const rpcvers_t, const rpcproc_t, 496 const xdrproc_t, const char *, 497 const xdrproc_t, char *, const char *); 498__END_DECLS 499 500/* 501 * RPC broadcast interface 502 * The call is broadcasted to all locally connected nets. 503 * 504 * extern enum clnt_stat 505 * rpc_broadcast(prog, vers, proc, xargs, argsp, xresults, resultsp, 506 * eachresult, nettype) 507 * const rpcprog_t prog; -- program number 508 * const rpcvers_t vers; -- version number 509 * const rpcproc_t proc; -- procedure number 510 * const xdrproc_t xargs; -- xdr routine for args 511 * caddr_t argsp; -- pointer to args 512 * const xdrproc_t xresults; -- xdr routine for results 513 * caddr_t resultsp; -- pointer to results 514 * const resultproc_t eachresult; -- call with each result 515 * const char *nettype; -- Transport type 516 * 517 * For each valid response received, the procedure eachresult is called. 518 * Its form is: 519 * done = eachresult(resp, raddr, nconf) 520 * bool_t done; 521 * caddr_t resp; 522 * struct netbuf *raddr; 523 * struct netconfig *nconf; 524 * where resp points to the results of the call and raddr is the 525 * address if the responder to the broadcast. nconf is the transport 526 * on which the response was received. 527 * 528 * extern enum clnt_stat 529 * rpc_broadcast_exp(prog, vers, proc, xargs, argsp, xresults, resultsp, 530 * eachresult, inittime, waittime, nettype) 531 * const rpcprog_t prog; -- program number 532 * const rpcvers_t vers; -- version number 533 * const rpcproc_t proc; -- procedure number 534 * const xdrproc_t xargs; -- xdr routine for args 535 * caddr_t argsp; -- pointer to args 536 * const xdrproc_t xresults; -- xdr routine for results 537 * caddr_t resultsp; -- pointer to results 538 * const resultproc_t eachresult; -- call with each result 539 * const int inittime; -- how long to wait initially 540 * const int waittime; -- maximum time to wait 541 * const char *nettype; -- Transport type 542 */ 543 544typedef bool_t (*resultproc_t)(caddr_t, ...); 545 546__BEGIN_DECLS 547extern enum clnt_stat rpc_broadcast(const rpcprog_t, const rpcvers_t, 548 const rpcproc_t, const xdrproc_t, 549 caddr_t, const xdrproc_t, caddr_t, 550 const resultproc_t, const char *); 551extern enum clnt_stat rpc_broadcast_exp(const rpcprog_t, const rpcvers_t, 552 const rpcproc_t, const xdrproc_t, 553 caddr_t, const xdrproc_t, caddr_t, 554 const resultproc_t, const int, 555 const int, const char *); 556__END_DECLS 557 558/* For backward compatibility */ 559#include <rpc/clnt_soc.h> 560 561#endif /* !_RPC_CLNT_H_ */ 562