1/* $NetBSD: clnt.h,v 1.14 2000/06/02 22:57:55 fvdl Exp $ */ 2 3/*- 4 * SPDX-License-Identifier: BSD-3-Clause 5 * 6 * Copyright (c) 2010, Oracle America, Inc. 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions are met: 11 * - Redistributions of source code must retain the above copyright notice, 12 * this list of conditions and the following disclaimer. 13 * - Redistributions in binary form must reproduce the above copyright notice, 14 * this list of conditions and the following disclaimer in the documentation 15 * and/or other materials provided with the distribution. 16 * - Neither the name of the "Oracle America, Inc." nor the names of its 17 * contributors may be used to endorse or promote products derived 18 * from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 21 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 24 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30 * POSSIBILITY OF SUCH DAMAGE. 31 * 32 * from: @(#)clnt.h 1.31 94/04/29 SMI 33 * from: @(#)clnt.h 2.1 88/07/29 4.0 RPCSRC 34 * $FreeBSD$ 35 */ 36 37/* 38 * clnt.h - Client side remote procedure call interface. 39 */ 40 41#ifndef _RPC_CLNT_H_ 42#define _RPC_CLNT_H_ 43#include <rpc/clnt_stat.h> 44#include <sys/cdefs.h> 45#include <netconfig.h> 46#include <sys/un.h> 47 48/* 49 * Well-known IPV6 RPC broadcast address. 50 */ 51#define RPCB_MULTICAST_ADDR "ff02::202" 52 53/* 54 * the following errors are in general unrecoverable. The caller 55 * should give up rather than retry. 56 */ 57#define IS_UNRECOVERABLE_RPC(s) (((s) == RPC_AUTHERROR) || \ 58 ((s) == RPC_CANTENCODEARGS) || \ 59 ((s) == RPC_CANTDECODERES) || \ 60 ((s) == RPC_VERSMISMATCH) || \ 61 ((s) == RPC_PROCUNAVAIL) || \ 62 ((s) == RPC_PROGUNAVAIL) || \ 63 ((s) == RPC_PROGVERSMISMATCH) || \ 64 ((s) == RPC_CANTDECODEARGS)) 65 66/* 67 * Error info. 68 */ 69struct rpc_err { 70 enum clnt_stat re_status; 71 union { 72 int RE_errno; /* related system error */ 73 enum auth_stat RE_why; /* why the auth error occurred */ 74 struct { 75 rpcvers_t low; /* lowest version supported */ 76 rpcvers_t high; /* highest version supported */ 77 } RE_vers; 78 struct { /* maybe meaningful if RPC_FAILED */ 79 int32_t s1; 80 int32_t s2; 81 } RE_lb; /* life boot & debugging only */ 82 } ru; 83#define re_errno ru.RE_errno 84#define re_why ru.RE_why 85#define re_vers ru.RE_vers 86#define re_lb ru.RE_lb 87}; 88 89 90/* 91 * Client rpc handle. 92 * Created by individual implementations 93 * Client is responsible for initializing auth, see e.g. auth_none.c. 94 */ 95typedef struct __rpc_client { 96 AUTH *cl_auth; /* authenticator */ 97 struct clnt_ops { 98 /* call remote procedure */ 99 enum clnt_stat (*cl_call)(struct __rpc_client *, 100 rpcproc_t, xdrproc_t, void *, xdrproc_t, 101 void *, struct timeval); 102 /* abort a call */ 103 void (*cl_abort)(struct __rpc_client *); 104 /* get specific error code */ 105 void (*cl_geterr)(struct __rpc_client *, 106 struct rpc_err *); 107 /* frees results */ 108 bool_t (*cl_freeres)(struct __rpc_client *, 109 xdrproc_t, void *); 110 /* destroy this structure */ 111 void (*cl_destroy)(struct __rpc_client *); 112 /* the ioctl() of rpc */ 113 bool_t (*cl_control)(struct __rpc_client *, u_int, 114 void *); 115 } *cl_ops; 116 void *cl_private; /* private stuff */ 117 char *cl_netid; /* network token */ 118 char *cl_tp; /* device name */ 119} CLIENT; 120 121 122/* 123 * Timers used for the pseudo-transport protocol when using datagrams 124 */ 125struct rpc_timers { 126 u_short rt_srtt; /* smoothed round-trip time */ 127 u_short rt_deviate; /* estimated deviation */ 128 u_long rt_rtxcur; /* current (backed-off) rto */ 129}; 130 131/* 132 * Feedback values used for possible congestion and rate control 133 */ 134#define FEEDBACK_REXMIT1 1 /* first retransmit */ 135#define FEEDBACK_OK 2 /* no retransmits */ 136 137/* Used to set version of portmapper used in broadcast */ 138 139#define CLCR_SET_LOWVERS 3 140#define CLCR_GET_LOWVERS 4 141 142#define RPCSMALLMSGSIZE 400 /* a more reasonable packet size */ 143 144/* 145 * client side rpc interface ops 146 * 147 * Parameter types are: 148 * 149 */ 150 151/* 152 * enum clnt_stat 153 * CLNT_CALL(rh, proc, xargs, argsp, xres, resp, timeout) 154 * CLIENT *rh; 155 * rpcproc_t proc; 156 * xdrproc_t xargs; 157 * void *argsp; 158 * xdrproc_t xres; 159 * void *resp; 160 * struct timeval timeout; 161 */ 162#define CLNT_CALL(rh, proc, xargs, argsp, xres, resp, secs) \ 163 ((*(rh)->cl_ops->cl_call)(rh, proc, xargs, \ 164 argsp, xres, resp, secs)) 165#define clnt_call(rh, proc, xargs, argsp, xres, resp, secs) \ 166 ((*(rh)->cl_ops->cl_call)(rh, proc, xargs, \ 167 argsp, xres, resp, secs)) 168 169/* 170 * void 171 * CLNT_ABORT(rh); 172 * CLIENT *rh; 173 */ 174#define CLNT_ABORT(rh) ((*(rh)->cl_ops->cl_abort)(rh)) 175#define clnt_abort(rh) ((*(rh)->cl_ops->cl_abort)(rh)) 176 177/* 178 * struct rpc_err 179 * CLNT_GETERR(rh); 180 * CLIENT *rh; 181 */ 182#define CLNT_GETERR(rh,errp) ((*(rh)->cl_ops->cl_geterr)(rh, errp)) 183#define clnt_geterr(rh,errp) ((*(rh)->cl_ops->cl_geterr)(rh, errp)) 184 185 186/* 187 * bool_t 188 * CLNT_FREERES(rh, xres, resp); 189 * CLIENT *rh; 190 * xdrproc_t xres; 191 * void *resp; 192 */ 193#define CLNT_FREERES(rh,xres,resp) ((*(rh)->cl_ops->cl_freeres)(rh,xres,resp)) 194#define clnt_freeres(rh,xres,resp) ((*(rh)->cl_ops->cl_freeres)(rh,xres,resp)) 195 196/* 197 * bool_t 198 * CLNT_CONTROL(cl, request, info) 199 * CLIENT *cl; 200 * u_int request; 201 * char *info; 202 */ 203#define CLNT_CONTROL(cl,rq,in) ((*(cl)->cl_ops->cl_control)(cl,rq,in)) 204#define clnt_control(cl,rq,in) ((*(cl)->cl_ops->cl_control)(cl,rq,in)) 205 206/* 207 * control operations that apply to both udp and tcp transports 208 */ 209#define CLSET_TIMEOUT 1 /* set timeout (timeval) */ 210#define CLGET_TIMEOUT 2 /* get timeout (timeval) */ 211#define CLGET_SERVER_ADDR 3 /* get server's address (sockaddr) */ 212#define CLGET_FD 6 /* get connections file descriptor */ 213#define CLGET_SVC_ADDR 7 /* get server's address (netbuf) */ 214#define CLSET_FD_CLOSE 8 /* close fd while clnt_destroy */ 215#define CLSET_FD_NCLOSE 9 /* Do not close fd while clnt_destroy */ 216#define CLGET_XID 10 /* Get xid */ 217#define CLSET_XID 11 /* Set xid */ 218#define CLGET_VERS 12 /* Get version number */ 219#define CLSET_VERS 13 /* Set version number */ 220#define CLGET_PROG 14 /* Get program number */ 221#define CLSET_PROG 15 /* Set program number */ 222#define CLSET_SVC_ADDR 16 /* get server's address (netbuf) */ 223#define CLSET_PUSH_TIMOD 17 /* push timod if not already present */ 224#define CLSET_POP_TIMOD 18 /* pop timod */ 225/* 226 * Connectionless only control operations 227 */ 228#define CLSET_RETRY_TIMEOUT 4 /* set retry timeout (timeval) */ 229#define CLGET_RETRY_TIMEOUT 5 /* get retry timeout (timeval) */ 230#define CLSET_ASYNC 19 231#define CLSET_CONNECT 20 /* Use connect() for UDP. (int) */ 232 233/* 234 * void 235 * CLNT_DESTROY(rh); 236 * CLIENT *rh; 237 */ 238#define CLNT_DESTROY(rh) ((*(rh)->cl_ops->cl_destroy)(rh)) 239#define clnt_destroy(rh) ((*(rh)->cl_ops->cl_destroy)(rh)) 240 241 242/* 243 * RPCTEST is a test program which is accessible on every rpc 244 * transport/port. It is used for testing, performance evaluation, 245 * and network administration. 246 */ 247 248#define RPCTEST_PROGRAM ((rpcprog_t)1) 249#define RPCTEST_VERSION ((rpcvers_t)1) 250#define RPCTEST_NULL_PROC ((rpcproc_t)2) 251#define RPCTEST_NULL_BATCH_PROC ((rpcproc_t)3) 252 253/* 254 * By convention, procedure 0 takes null arguments and returns them 255 */ 256 257#define NULLPROC ((rpcproc_t)0) 258 259/* 260 * Below are the client handle creation routines for the various 261 * implementations of client side rpc. They can return NULL if a 262 * creation failure occurs. 263 */ 264 265/* 266 * Generic client creation routine. Supported protocols are those that 267 * belong to the nettype namespace (/etc/netconfig). 268 */ 269__BEGIN_DECLS 270extern CLIENT *clnt_create(const char *, const rpcprog_t, const rpcvers_t, 271 const char *); 272/* 273 * 274 * const char *hostname; -- hostname 275 * const rpcprog_t prog; -- program number 276 * const rpcvers_t vers; -- version number 277 * const char *nettype; -- network type 278 */ 279 280 /* 281 * Generic client creation routine. Just like clnt_create(), except 282 * it takes an additional timeout parameter. 283 */ 284extern CLIENT * clnt_create_timed(const char *, const rpcprog_t, 285 const rpcvers_t, const char *, const struct timeval *); 286/* 287 * 288 * const char *hostname; -- hostname 289 * const rpcprog_t prog; -- program number 290 * const rpcvers_t vers; -- version number 291 * const char *nettype; -- network type 292 * const struct timeval *tp; -- timeout 293 */ 294 295/* 296 * Generic client creation routine. Supported protocols are which belong 297 * to the nettype name space. 298 */ 299extern CLIENT *clnt_create_vers(const char *, const rpcprog_t, rpcvers_t *, 300 const rpcvers_t, const rpcvers_t, 301 const char *); 302/* 303 * const char *host; -- hostname 304 * const rpcprog_t prog; -- program number 305 * rpcvers_t *vers_out; -- servers highest available version 306 * const rpcvers_t vers_low; -- low version number 307 * const rpcvers_t vers_high; -- high version number 308 * const char *nettype; -- network type 309 */ 310 311/* 312 * Generic client creation routine. Supported protocols are which belong 313 * to the nettype name space. 314 */ 315extern CLIENT * clnt_create_vers_timed(const char *, const rpcprog_t, 316 rpcvers_t *, const rpcvers_t, const rpcvers_t, const char *, 317 const struct timeval *); 318/* 319 * const char *host; -- hostname 320 * const rpcprog_t prog; -- program number 321 * rpcvers_t *vers_out; -- servers highest available version 322 * const rpcvers_t vers_low; -- low version number 323 * const rpcvers_t vers_high; -- high version number 324 * const char *nettype; -- network type 325 * const struct timeval *tp -- timeout 326 */ 327 328/* 329 * Generic client creation routine. It takes a netconfig structure 330 * instead of nettype 331 */ 332extern CLIENT *clnt_tp_create(const char *, const rpcprog_t, 333 const rpcvers_t, const struct netconfig *); 334/* 335 * const char *hostname; -- hostname 336 * const rpcprog_t prog; -- program number 337 * const rpcvers_t vers; -- version number 338 * const struct netconfig *netconf; -- network config structure 339 */ 340 341/* 342 * Generic client creation routine. Just like clnt_tp_create(), except 343 * it takes an additional timeout parameter. 344 */ 345extern CLIENT * clnt_tp_create_timed(const char *, const rpcprog_t, 346 const rpcvers_t, const struct netconfig *, const struct timeval *); 347/* 348 * const char *hostname; -- hostname 349 * const rpcprog_t prog; -- program number 350 * const rpcvers_t vers; -- version number 351 * const struct netconfig *netconf; -- network config structure 352 * const struct timeval *tp -- timeout 353 */ 354 355/* 356 * Generic TLI create routine. Only provided for compatibility. 357 */ 358 359extern CLIENT *clnt_tli_create(const int, const struct netconfig *, 360 struct netbuf *, const rpcprog_t, 361 const rpcvers_t, const u_int, const u_int); 362/* 363 * const register int fd; -- fd 364 * const struct netconfig *nconf; -- netconfig structure 365 * struct netbuf *svcaddr; -- servers address 366 * const u_long prog; -- program number 367 * const u_long vers; -- version number 368 * const u_int sendsz; -- send size 369 * const u_int recvsz; -- recv size 370 */ 371 372/* 373 * Low level clnt create routine for connectionful transports, e.g. tcp. 374 */ 375extern CLIENT *clnt_vc_create(const int, const struct netbuf *, 376 const rpcprog_t, const rpcvers_t, 377 u_int, u_int); 378/* 379 * Added for compatibility to old rpc 4.0. Obsoleted by clnt_vc_create(). 380 */ 381extern CLIENT *clntunix_create(struct sockaddr_un *, 382 u_long, u_long, int *, u_int, u_int); 383/* 384 * const int fd; -- open file descriptor 385 * const struct netbuf *svcaddr; -- servers address 386 * const rpcprog_t prog; -- program number 387 * const rpcvers_t vers; -- version number 388 * const u_int sendsz; -- buffer recv size 389 * const u_int recvsz; -- buffer send size 390 */ 391 392/* 393 * Low level clnt create routine for connectionless transports, e.g. udp. 394 */ 395extern CLIENT *clnt_dg_create(const int, const struct netbuf *, 396 const rpcprog_t, const rpcvers_t, 397 const u_int, const u_int); 398/* 399 * const int fd; -- open file descriptor 400 * const struct netbuf *svcaddr; -- servers address 401 * const rpcprog_t program; -- program number 402 * const rpcvers_t version; -- version number 403 * const u_int sendsz; -- buffer recv size 404 * const u_int recvsz; -- buffer send size 405 */ 406 407/* 408 * Memory based rpc (for speed check and testing) 409 * CLIENT * 410 * clnt_raw_create(prog, vers) 411 * u_long prog; 412 * u_long vers; 413 */ 414extern CLIENT *clnt_raw_create(rpcprog_t, rpcvers_t); 415 416__END_DECLS 417 418 419/* 420 * Print why creation failed 421 */ 422__BEGIN_DECLS 423extern void clnt_pcreateerror(const char *); /* stderr */ 424extern char *clnt_spcreateerror(const char *); /* string */ 425__END_DECLS 426 427/* 428 * Like clnt_perror(), but is more verbose in its output 429 */ 430__BEGIN_DECLS 431extern void clnt_perrno(enum clnt_stat); /* stderr */ 432extern char *clnt_sperrno(enum clnt_stat); /* string */ 433__END_DECLS 434 435/* 436 * Print an English error message, given the client error code 437 */ 438__BEGIN_DECLS 439extern void clnt_perror(CLIENT *, const char *); /* stderr */ 440extern char *clnt_sperror(CLIENT *, const char *); /* string */ 441__END_DECLS 442 443 444/* 445 * If a creation fails, the following allows the user to figure out why. 446 */ 447struct rpc_createerr { 448 enum clnt_stat cf_stat; 449 struct rpc_err cf_error; /* useful when cf_stat == RPC_PMAPFAILURE */ 450}; 451 452__BEGIN_DECLS 453extern struct rpc_createerr *__rpc_createerr(void); 454__END_DECLS 455#define rpc_createerr (*(__rpc_createerr())) 456 457/* 458 * The simplified interface: 459 * enum clnt_stat 460 * rpc_call(host, prognum, versnum, procnum, inproc, in, outproc, out, nettype) 461 * const char *host; 462 * const rpcprog_t prognum; 463 * const rpcvers_t versnum; 464 * const rpcproc_t procnum; 465 * const xdrproc_t inproc, outproc; 466 * const char *in; 467 * char *out; 468 * const char *nettype; 469 */ 470__BEGIN_DECLS 471extern enum clnt_stat rpc_call(const char *, const rpcprog_t, 472 const rpcvers_t, const rpcproc_t, 473 const xdrproc_t, const char *, 474 const xdrproc_t, char *, const char *); 475__END_DECLS 476 477/* 478 * RPC broadcast interface 479 * The call is broadcasted to all locally connected nets. 480 * 481 * extern enum clnt_stat 482 * rpc_broadcast(prog, vers, proc, xargs, argsp, xresults, resultsp, 483 * eachresult, nettype) 484 * const rpcprog_t prog; -- program number 485 * const rpcvers_t vers; -- version number 486 * const rpcproc_t proc; -- procedure number 487 * const xdrproc_t xargs; -- xdr routine for args 488 * caddr_t argsp; -- pointer to args 489 * const xdrproc_t xresults; -- xdr routine for results 490 * caddr_t resultsp; -- pointer to results 491 * const resultproc_t eachresult; -- call with each result 492 * const char *nettype; -- Transport type 493 * 494 * For each valid response received, the procedure eachresult is called. 495 * Its form is: 496 * done = eachresult(resp, raddr, nconf) 497 * bool_t done; 498 * caddr_t resp; 499 * struct netbuf *raddr; 500 * struct netconfig *nconf; 501 * where resp points to the results of the call and raddr is the 502 * address if the responder to the broadcast. nconf is the transport 503 * on which the response was received. 504 * 505 * extern enum clnt_stat 506 * rpc_broadcast_exp(prog, vers, proc, xargs, argsp, xresults, resultsp, 507 * eachresult, inittime, waittime, nettype) 508 * const rpcprog_t prog; -- program number 509 * const rpcvers_t vers; -- version number 510 * const rpcproc_t proc; -- procedure number 511 * const xdrproc_t xargs; -- xdr routine for args 512 * caddr_t argsp; -- pointer to args 513 * const xdrproc_t xresults; -- xdr routine for results 514 * caddr_t resultsp; -- pointer to results 515 * const resultproc_t eachresult; -- call with each result 516 * const int inittime; -- how long to wait initially 517 * const int waittime; -- maximum time to wait 518 * const char *nettype; -- Transport type 519 */ 520 521typedef bool_t (*resultproc_t)(caddr_t, ...); 522 523__BEGIN_DECLS 524extern enum clnt_stat rpc_broadcast(const rpcprog_t, const rpcvers_t, 525 const rpcproc_t, const xdrproc_t, 526 caddr_t, const xdrproc_t, caddr_t, 527 const resultproc_t, const char *); 528extern enum clnt_stat rpc_broadcast_exp(const rpcprog_t, const rpcvers_t, 529 const rpcproc_t, const xdrproc_t, 530 caddr_t, const xdrproc_t, caddr_t, 531 const resultproc_t, const int, 532 const int, const char *); 533__END_DECLS 534 535/* For backward compatibility */ 536#include <rpc/clnt_soc.h> 537 538#endif /* !_RPC_CLNT_H_ */ 539