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 */ 53enum 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 */ 106struct 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 */ 132typedef struct CLIENT CLIENT; 133struct CLIENT { 134 AUTH *cl_auth; /* authenticator */ 135 /* not sure whether non-const-ness is a part of the spec... if it is, 136 * enclose "const" in #ifdef _LIBC / #endif 137 * to make it effective only for libc compile */ 138 const 139 struct clnt_ops { 140 enum clnt_stat (*cl_call) (CLIENT *, u_long, xdrproc_t, caddr_t, xdrproc_t, 141 caddr_t, struct timeval); 142 /* call remote procedure */ 143 void (*cl_abort) (void); /* abort a call */ 144 void (*cl_geterr) (CLIENT *, struct rpc_err *); 145 /* get specific error code */ 146 bool_t (*cl_freeres) (CLIENT *, xdrproc_t, caddr_t); 147 /* frees results */ 148 void (*cl_destroy) (CLIENT *); /* destroy this structure */ 149 bool_t (*cl_control) (CLIENT *, int, char *); 150 /* the ioctl() of rpc */ 151 } *cl_ops; 152 caddr_t cl_private; /* private stuff */ 153}; 154 155 156/* 157 * client side rpc interface ops 158 * 159 * Parameter types are: 160 * 161 */ 162 163/* 164 * enum clnt_stat 165 * CLNT_CALL(rh, proc, xargs, argsp, xres, resp, timeout) 166 * CLIENT *rh; 167 * u_long proc; 168 * xdrproc_t xargs; 169 * caddr_t argsp; 170 * xdrproc_t xres; 171 * caddr_t resp; 172 * struct timeval timeout; 173 */ 174#define CLNT_CALL(rh, proc, xargs, argsp, xres, resp, secs) \ 175 ((*(rh)->cl_ops->cl_call)(rh, proc, xargs, argsp, xres, resp, secs)) 176#define clnt_call(rh, proc, xargs, argsp, xres, resp, secs) \ 177 ((*(rh)->cl_ops->cl_call)(rh, proc, xargs, argsp, xres, resp, secs)) 178 179/* 180 * void 181 * CLNT_ABORT(rh); 182 * CLIENT *rh; 183 */ 184#define CLNT_ABORT(rh) ((*(rh)->cl_ops->cl_abort)(rh)) 185#define clnt_abort(rh) ((*(rh)->cl_ops->cl_abort)(rh)) 186 187/* 188 * struct rpc_err 189 * CLNT_GETERR(rh); 190 * CLIENT *rh; 191 */ 192#define CLNT_GETERR(rh,errp) ((*(rh)->cl_ops->cl_geterr)(rh, errp)) 193#define clnt_geterr(rh,errp) ((*(rh)->cl_ops->cl_geterr)(rh, errp)) 194 195 196/* 197 * bool_t 198 * CLNT_FREERES(rh, xres, resp); 199 * CLIENT *rh; 200 * xdrproc_t xres; 201 * caddr_t resp; 202 */ 203#define CLNT_FREERES(rh,xres,resp) ((*(rh)->cl_ops->cl_freeres)(rh,xres,resp)) 204#define clnt_freeres(rh,xres,resp) ((*(rh)->cl_ops->cl_freeres)(rh,xres,resp)) 205 206/* 207 * bool_t 208 * CLNT_CONTROL(cl, request, info) 209 * CLIENT *cl; 210 * u_int request; 211 * char *info; 212 */ 213#define CLNT_CONTROL(cl,rq,in) ((*(cl)->cl_ops->cl_control)(cl,rq,in)) 214#define clnt_control(cl,rq,in) ((*(cl)->cl_ops->cl_control)(cl,rq,in)) 215 216/* 217 * control operations that apply to all transports 218 * 219 * Note: options marked XXX are no-ops in this implementation of RPC. 220 * The are present in TI-RPC but can't be implemented here since they 221 * depend on the presence of STREAMS/TLI, which we don't have. 222 */ 223#define CLSET_TIMEOUT 1 /* set timeout (timeval) */ 224#define CLGET_TIMEOUT 2 /* get timeout (timeval) */ 225#define CLGET_SERVER_ADDR 3 /* get server's address (sockaddr) */ 226#define CLGET_FD 6 /* get connections file descriptor */ 227#define CLGET_SVC_ADDR 7 /* get server's address (netbuf) XXX */ 228#define CLSET_FD_CLOSE 8 /* close fd while clnt_destroy */ 229#define CLSET_FD_NCLOSE 9 /* Do not close fd while clnt_destroy*/ 230#define CLGET_XID 10 /* Get xid */ 231#define CLSET_XID 11 /* Set xid */ 232#define CLGET_VERS 12 /* Get version number */ 233#define CLSET_VERS 13 /* Set version number */ 234#define CLGET_PROG 14 /* Get program number */ 235#define CLSET_PROG 15 /* Set program number */ 236#define CLSET_SVC_ADDR 16 /* get server's address (netbuf) XXX */ 237#define CLSET_PUSH_TIMOD 17 /* push timod if not already present XXX */ 238#define CLSET_POP_TIMOD 18 /* pop timod XXX */ 239/* 240 * Connectionless only control operations 241 */ 242#define CLSET_RETRY_TIMEOUT 4 /* set retry timeout (timeval) */ 243#define CLGET_RETRY_TIMEOUT 5 /* get retry timeout (timeval) */ 244 245/* 246 * void 247 * CLNT_DESTROY(rh); 248 * CLIENT *rh; 249 */ 250#define CLNT_DESTROY(rh) ((*(rh)->cl_ops->cl_destroy)(rh)) 251#define clnt_destroy(rh) ((*(rh)->cl_ops->cl_destroy)(rh)) 252 253 254/* 255 * RPCTEST is a test program which is accessible on every rpc 256 * transport/port. It is used for testing, performance evaluation, 257 * and network administration. 258 */ 259 260#define RPCTEST_PROGRAM ((u_long)1) 261#define RPCTEST_VERSION ((u_long)1) 262#define RPCTEST_NULL_PROC ((u_long)2) 263#define RPCTEST_NULL_BATCH_PROC ((u_long)3) 264 265/* 266 * By convention, procedure 0 takes null arguments and returns them 267 */ 268 269#define NULLPROC ((u_long)0) 270 271/* 272 * Below are the client handle creation routines for the various 273 * implementations of client side rpc. They can return NULL if a 274 * creation failure occurs. 275 */ 276 277/* 278 * Memory based rpc (for speed check and testing) 279 * CLIENT * 280 * clntraw_create(prog, vers) 281 * u_long prog; 282 * u_long vers; 283 */ 284extern CLIENT *clntraw_create (__const u_long __prog, __const u_long __vers) 285 __THROW; 286 287 288/* 289 * Generic client creation routine. Supported protocols are "udp", "tcp" and 290 * "unix" 291 * CLIENT * 292 * clnt_create(host, prog, vers, prot) 293 * char *host; -- hostname 294 * u_long prog; -- program number 295 * u_ong vers; -- version number 296 * char *prot; -- protocol 297 */ 298extern CLIENT *clnt_create (__const char *__host, __const u_long __prog, 299 __const u_long __vers, __const char *__prot) 300 __THROW; 301 302 303/* 304 * TCP based rpc 305 * CLIENT * 306 * clnttcp_create(raddr, prog, vers, sockp, sendsz, recvsz) 307 * struct sockaddr_in *raddr; 308 * u_long prog; 309 * u_long version; 310 * register int *sockp; 311 * u_int sendsz; 312 * u_int recvsz; 313 */ 314extern CLIENT *clnttcp_create (struct sockaddr_in *__raddr, u_long __prog, 315 u_long __version, int *__sockp, u_int __sendsz, 316 u_int __recvsz) __THROW; 317 318/* 319 * UDP based rpc. 320 * CLIENT * 321 * clntudp_create(raddr, program, version, wait, sockp) 322 * struct sockaddr_in *raddr; 323 * u_long program; 324 * u_long version; 325 * struct timeval wait_resend; 326 * int *sockp; 327 * 328 * Same as above, but you specify max packet sizes. 329 * CLIENT * 330 * clntudp_bufcreate(raddr, program, version, wait, sockp, sendsz, recvsz) 331 * struct sockaddr_in *raddr; 332 * u_long program; 333 * u_long version; 334 * struct timeval wait_resend; 335 * int *sockp; 336 * u_int sendsz; 337 * u_int recvsz; 338 */ 339extern CLIENT *clntudp_create (struct sockaddr_in *__raddr, u_long __program, 340 u_long __version, struct timeval __wait_resend, 341 int *__sockp) __THROW; 342extern CLIENT *clntudp_bufcreate (struct sockaddr_in *__raddr, 343 u_long __program, u_long __version, 344 struct timeval __wait_resend, int *__sockp, 345 u_int __sendsz, u_int __recvsz) __THROW; 346 347 348/* 349 * AF_UNIX based rpc 350 * CLIENT * 351 * clntunix_create(raddr, prog, vers, sockp, sendsz, recvsz) 352 * struct sockaddr_un *raddr; 353 * u_long prog; 354 * u_long version; 355 * register int *sockp; 356 * u_int sendsz; 357 * u_int recvsz; 358 */ 359extern CLIENT *clntunix_create (struct sockaddr_un *__raddr, u_long __program, 360 u_long __version, int *__sockp, 361 u_int __sendsz, u_int __recvsz) __THROW; 362 363 364extern int callrpc (__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) __THROW; 368extern int _rpc_dtablesize (void) __THROW; 369 370/* 371 * Print why creation failed 372 */ 373extern void clnt_pcreateerror (__const char *__msg); /* stderr */ 374extern char *clnt_spcreateerror(__const char *__msg) __THROW; /* string */ 375 376/* 377 * Like clnt_perror(), but is more verbose in its output 378 */ 379extern void clnt_perrno (enum clnt_stat __num); /* stderr */ 380 381/* 382 * Print an English error message, given the client error code 383 */ 384extern void clnt_perror (CLIENT *__clnt, __const char *__msg); 385 /* stderr */ 386extern char *clnt_sperror (CLIENT *__clnt, __const char *__msg) __THROW; 387 /* string */ 388 389 390/* 391 * If a creation fails, the following allows the user to figure out why. 392 */ 393struct rpc_createerr { 394 enum clnt_stat cf_stat; 395 struct rpc_err cf_error; /* useful when cf_stat == RPC_PMAPFAILURE */ 396}; 397 398extern struct rpc_createerr rpc_createerr; 399 400 401 402/* 403 * Copy error message to buffer. 404 */ 405extern char *clnt_sperrno (enum clnt_stat __num) __THROW; /* string */ 406 407/* 408 * get the port number on the host for the rpc program,version and proto 409 */ 410extern int getrpcport (__const char * __host, u_long __prognum, 411 u_long __versnum, u_int proto) __THROW; 412 413/* 414 * get the local host's IP address without consulting 415 * name service library functions 416 */ 417extern void get_myaddress (struct sockaddr_in *) __THROW; 418 419#define UDPMSGSIZE 8800 /* rpc imposed limit on udp msg size */ 420#define RPCSMALLMSGSIZE 400 /* a more reasonable packet size */ 421 422__END_DECLS 423 424#endif /* rpc/clnt.h */ 425