svc.h revision 1.28
1 /* $NetBSD: svc.h,v 1.28 2015/11/07 16:58:24 christos Exp $ */ 2 3 /* 4 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for 5 * unrestricted use provided that this legend is included on all tape 6 * media and as a part of the software program in whole or part. Users 7 * may copy or modify Sun RPC without charge, but are not authorized 8 * to license or distribute it to anyone else except as part of a product or 9 * program developed by the user. 10 * 11 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE 12 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR 13 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. 14 * 15 * Sun RPC is provided with no support and without any obligation on the 16 * part of Sun Microsystems, Inc. to assist in its use, correction, 17 * modification or enhancement. 18 * 19 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE 20 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC 21 * OR ANY PART THEREOF. 22 * 23 * In no event will Sun Microsystems, Inc. be liable for any lost revenue 24 * or profits or other special, indirect and consequential damages, even if 25 * Sun has been advised of the possibility of such damages. 26 * 27 * Sun Microsystems, Inc. 28 * 2550 Garcia Avenue 29 * Mountain View, California 94043 30 * 31 * from: @(#)svc.h 1.35 88/12/17 SMI 32 * @(#)svc.h 1.27 94/04/25 SMI 33 */ 34 35 /* 36 * svc.h, Server-side remote procedure call interface. 37 * 38 * Copyright (C) 1986-1993 by Sun Microsystems, Inc. 39 */ 40 41 #ifndef _RPC_SVC_H_ 42 #define _RPC_SVC_H_ 43 #include <sys/cdefs.h> 44 45 #include <rpc/rpc_com.h> 46 47 /* 48 * This interface must manage two items concerning remote procedure calling: 49 * 50 * 1) An arbitrary number of transport connections upon which rpc requests 51 * are received. The two most notable transports are TCP and UDP; they are 52 * created and registered by routines in svc_tcp.c and svc_udp.c, respectively; 53 * they in turn call xprt_register and xprt_unregister. 54 * 55 * 2) An arbitrary number of locally registered services. Services are 56 * described by the following four data: program number, version number, 57 * "service dispatch" function, a transport handle, and a boolean that 58 * indicates whether or not the exported program should be registered with a 59 * local binder service; if true the program's number and version and the 60 * port number from the transport handle are registered with the binder. 61 * These data are registered with the rpc svc system via svc_register. 62 * 63 * A service's dispatch function is called whenever an rpc request comes in 64 * on a transport. The request's program and version numbers must match 65 * those of the registered service. The dispatch function is passed two 66 * parameters, struct svc_req * and SVCXPRT *, defined below. 67 */ 68 69 /* 70 * Service control requests 71 */ 72 #define SVCGET_VERSQUIET 1 73 #define SVCSET_VERSQUIET 2 74 #define SVCGET_CONNMAXREC 3 75 #define SVCSET_CONNMAXREC 4 76 77 78 enum xprt_stat { 79 XPRT_DIED, 80 XPRT_MOREREQS, 81 XPRT_IDLE 82 }; 83 84 /* 85 * Server side transport handle 86 */ 87 typedef struct __rpc_svcxprt { 88 int xp_fd; 89 u_short xp_port; /* associated port number */ 90 const struct xp_ops { 91 /* receive incomming requests */ 92 bool_t (*xp_recv)(struct __rpc_svcxprt *, struct rpc_msg *); 93 /* get transport status */ 94 enum xprt_stat (*xp_stat)(struct __rpc_svcxprt *); 95 /* get arguments */ 96 bool_t (*xp_getargs)(struct __rpc_svcxprt *, xdrproc_t, 97 caddr_t); 98 /* send reply */ 99 bool_t (*xp_reply)(struct __rpc_svcxprt *, struct rpc_msg *); 100 /* free mem allocated for args */ 101 bool_t (*xp_freeargs)(struct __rpc_svcxprt *, xdrproc_t, 102 caddr_t); 103 /* destroy this struct */ 104 void (*xp_destroy)(struct __rpc_svcxprt *); 105 } *xp_ops; 106 int xp_addrlen; /* length of remote address */ 107 struct sockaddr_in xp_raddr; /* rem. addr. (backward ABI compat) */ 108 /* XXX - fvdl stick this here for ABI backward compat reasons */ 109 const struct xp_ops2 { 110 /* catch-all function */ 111 bool_t (*xp_control)(struct __rpc_svcxprt *, const u_int, 112 void *); 113 } *xp_ops2; 114 char *xp_tp; /* transport provider device name */ 115 char *xp_netid; /* network token */ 116 struct netbuf xp_ltaddr; /* local transport address */ 117 struct netbuf xp_rtaddr; /* remote transport address */ 118 struct opaque_auth xp_verf; /* raw response verifier */ 119 void *xp_p1; /* private: for use by svc ops */ 120 void *xp_p2; /* private: for use by svc ops */ 121 void *xp_p3; /* private: for use by svc lib */ 122 int xp_type; /* transport type */ 123 } SVCXPRT; 124 125 /* 126 * Service request 127 */ 128 struct svc_req { 129 uint32_t rq_prog; /* service program number */ 130 uint32_t rq_vers; /* service protocol version */ 131 uint32_t rq_proc; /* the desired procedure */ 132 struct opaque_auth rq_cred; /* raw creds from the wire */ 133 void *rq_clntcred; /* read only cooked cred */ 134 SVCXPRT *rq_xprt; /* associated transport */ 135 }; 136 137 /* 138 * Approved way of getting address of caller 139 */ 140 #define svc_getrpccaller(x) (&(x)->xp_rtaddr) 141 142 /* 143 * NetBSD-only definition to get the creds of the caller (AF_LOCAL). 144 */ 145 #define __svc_getcallercreds(x) ((struct sockcred *)(x)->xp_p2) 146 147 /* 148 * Operations defined on an SVCXPRT handle 149 * 150 * SVCXPRT *xprt; 151 * struct rpc_msg *msg; 152 * xdrproc_t xargs; 153 * caddr_t argsp; 154 */ 155 #define SVC_RECV(xprt, msg) \ 156 (*(xprt)->xp_ops->xp_recv)((xprt), (msg)) 157 #define svc_recv(xprt, msg) \ 158 (*(xprt)->xp_ops->xp_recv)((xprt), (msg)) 159 160 #define SVC_STAT(xprt) \ 161 (*(xprt)->xp_ops->xp_stat)(xprt) 162 #define svc_stat(xprt) \ 163 (*(xprt)->xp_ops->xp_stat)(xprt) 164 165 #define SVC_GETARGS(xprt, xargs, argsp) \ 166 (*(xprt)->xp_ops->xp_getargs)((xprt), ((xdrproc_t)(xargs)), (argsp)) 167 #define svc_getargs(xprt, xargs, argsp) \ 168 (*(xprt)->xp_ops->xp_getargs)((xprt), ((xdrproc_t)(xargs)), (argsp)) 169 170 #define SVC_REPLY(xprt, msg) \ 171 (*(xprt)->xp_ops->xp_reply) ((xprt), (msg)) 172 #define svc_reply(xprt, msg) \ 173 (*(xprt)->xp_ops->xp_reply) ((xprt), (msg)) 174 175 #define SVC_FREEARGS(xprt, xargs, argsp) \ 176 (*(xprt)->xp_ops->xp_freeargs)((xprt), ((xdrproc_t)(xargs)), (argsp)) 177 #define svc_freeargs(xprt, xargs, argsp) \ 178 (*(xprt)->xp_ops->xp_freeargs)((xprt), ((xdrproc_t)(xargs)), (argsp)) 179 180 #define SVC_DESTROY(xprt) \ 181 (*(xprt)->xp_ops->xp_destroy)(xprt) 182 #define svc_destroy(xprt) \ 183 (*(xprt)->xp_ops->xp_destroy)(xprt) 184 185 #define SVC_CONTROL(xprt, rq, in) \ 186 (*(xprt)->xp_ops2->xp_control)((xprt), (rq), (in)) 187 188 /* 189 * Service registration 190 * 191 * svc_reg(xprt, prog, vers, dispatch, nconf) 192 * const SVCXPRT *xprt; 193 * const rpcprog_t prog; 194 * const rpcvers_t vers; 195 * const void (*dispatch)(...); 196 * const struct netconfig *nconf; 197 */ 198 199 __BEGIN_DECLS 200 extern bool_t svc_reg(SVCXPRT *, const rpcprog_t, const rpcvers_t, 201 void (*)(struct svc_req *, SVCXPRT *), 202 const struct netconfig *); 203 __END_DECLS 204 205 /* 206 * Service un-registration 207 * 208 * svc_unreg(prog, vers) 209 * const rpcprog_t prog; 210 * const rpcvers_t vers; 211 */ 212 213 __BEGIN_DECLS 214 extern void svc_unreg(const rpcprog_t, const rpcvers_t); 215 __END_DECLS 216 217 /* 218 * Transport registration. 219 * 220 * xprt_register(xprt) 221 * SVCXPRT *xprt; 222 */ 223 __BEGIN_DECLS 224 extern bool_t xprt_register (SVCXPRT *); 225 __END_DECLS 226 227 /* 228 * Transport un-register 229 * 230 * xprt_unregister(xprt) 231 * SVCXPRT *xprt; 232 */ 233 __BEGIN_DECLS 234 extern void xprt_unregister (SVCXPRT *); 235 __END_DECLS 236 237 238 /* 239 * When the service routine is called, it must first check to see if it 240 * knows about the procedure; if not, it should call svcerr_noproc 241 * and return. If so, it should deserialize its arguments via 242 * SVC_GETARGS (defined above). If the deserialization does not work, 243 * svcerr_decode should be called followed by a return. Successful 244 * decoding of the arguments should be followed the execution of the 245 * procedure's code and a call to svc_sendreply. 246 * 247 * Also, if the service refuses to execute the procedure due to too- 248 * weak authentication parameters, svcerr_weakauth should be called. 249 * Note: do not confuse access-control failure with weak authentication! 250 * 251 * NB: In pure implementations of rpc, the caller always waits for a reply 252 * msg. This message is sent when svc_sendreply is called. 253 * Therefore pure service implementations should always call 254 * svc_sendreply even if the function logically returns void; use 255 * xdr.h - xdr_void for the xdr routine. HOWEVER, tcp based rpc allows 256 * for the abuse of pure rpc via batched calling or pipelining. In the 257 * case of a batched call, svc_sendreply should NOT be called since 258 * this would send a return message, which is what batching tries to avoid. 259 * It is the service/protocol writer's responsibility to know which calls are 260 * batched and which are not. Warning: responding to batch calls may 261 * deadlock the caller and server processes! 262 */ 263 264 __BEGIN_DECLS 265 extern bool_t svc_sendreply (SVCXPRT *, xdrproc_t, const char *); 266 extern void svcerr_decode (SVCXPRT *); 267 extern void svcerr_weakauth (SVCXPRT *); 268 extern void svcerr_noproc (SVCXPRT *); 269 extern void svcerr_progvers (SVCXPRT *, rpcvers_t, rpcvers_t); 270 extern void svcerr_auth (SVCXPRT *, enum auth_stat); 271 extern void svcerr_noprog (SVCXPRT *); 272 extern void svcerr_systemerr(SVCXPRT *); 273 extern int rpc_reg(rpcprog_t, rpcvers_t, rpcproc_t, 274 char *(*)(char *), xdrproc_t, xdrproc_t, 275 char *); 276 __END_DECLS 277 278 /* 279 * Lowest level dispatching -OR- who owns this process anyway. 280 * Somebody has to wait for incoming requests and then call the correct 281 * service routine. The routine svc_run does infinite waiting; i.e., 282 * svc_run never returns. 283 * Since another (co-existent) package may wish to selectively wait for 284 * incoming calls or other events outside of the rpc architecture, the 285 * routine svc_getreq is provided. It must be passed readfds, the 286 * "in-place" results of a select system call (see select, section 2). 287 */ 288 289 /* 290 * Global keeper of rpc service descriptors in use 291 * dynamic; must be inspected before each call to select 292 */ 293 #ifdef SVC_LEGACY 294 extern int svc_maxfd; 295 extern fd_set svc_fdset; 296 #else 297 #define svc_maxfd (*svc_fdset_getmax()) 298 #define svc_fdset (*svc_fdset_get()) 299 #endif 300 301 #define svc_fds svc_fdset.fds_bits[0] /* compatibility */ 302 303 /* 304 * a small program implemented by the svc_rpc implementation itself; 305 * also see clnt.h for protocol numbers. 306 */ 307 __BEGIN_DECLS 308 extern void rpctest_service(void); 309 __END_DECLS 310 311 __BEGIN_DECLS 312 313 #define SVC_FDSET_MT 1 314 extern void svc_fdset_init(int); 315 extern fd_set *svc_fdset_copy(const fd_set *); 316 317 extern void svc_fdset_zero(void); 318 extern int svc_fdset_isset(int); 319 extern int svc_fdset_clr(int); 320 extern int svc_fdset_set(int); 321 322 extern fd_set *svc_fdset_get(void); 323 extern int svc_fdset_getsize(int); 324 extern int *svc_fdset_getmax(void); 325 326 extern void svc_getreq (int); 327 extern void svc_getreqset (fd_set *); 328 extern void svc_getreqset2 (fd_set *, int); 329 extern void svc_getreq_common (int); 330 struct pollfd; 331 extern void svc_getreq_poll(struct pollfd *, int); 332 333 extern void svc_run (void); 334 extern void svc_exit (void); 335 __END_DECLS 336 337 /* 338 * Socket to use on svcxxx_create call to get default socket 339 */ 340 #define RPC_ANYSOCK -1 341 #define RPC_ANYFD RPC_ANYSOCK 342 343 /* 344 * These are the existing service side transport implementations 345 */ 346 347 __BEGIN_DECLS 348 /* 349 * Transport independent svc_create routine. 350 */ 351 extern int svc_create(void (*)(struct svc_req *, SVCXPRT *), 352 const rpcprog_t, const rpcvers_t, const char *); 353 /* 354 * void (*dispatch)(...); -- dispatch routine 355 * const rpcprog_t prognum; -- program number 356 * const rpcvers_t versnum; -- version number 357 * const char *nettype; -- network type 358 */ 359 360 361 /* 362 * Generic server creation routine. It takes a netconfig structure 363 * instead of a nettype. 364 */ 365 366 extern SVCXPRT *svc_tp_create(void (*)(struct svc_req *, SVCXPRT *), 367 const rpcprog_t, const rpcvers_t, 368 const struct netconfig *); 369 /* 370 * void (*dispatch)(...); -- dispatch routine 371 * const rpcprog_t prognum; -- program number 372 * const rpcvers_t versnum; -- version number 373 * const struct netconfig *nconf; -- netconfig structure 374 */ 375 376 377 /* 378 * Generic TLI create routine 379 */ 380 extern SVCXPRT *svc_tli_create(const int, const struct netconfig *, 381 const struct t_bind *, const u_int, 382 const u_int); 383 /* 384 * const int fd; -- connection end point 385 * const struct netconfig *nconf; -- netconfig structure for network 386 * const struct t_bind *bindaddr; -- local bind address 387 * const u_int sendsz; -- max sendsize 388 * const u_int recvsz; -- max recvsize 389 */ 390 391 /* 392 * Connectionless and connectionful create routines 393 */ 394 395 extern SVCXPRT *svc_vc_create(const int, const u_int, const u_int); 396 /* 397 * const int fd; -- open connection end point 398 * const u_int sendsize; -- max send size 399 * const u_int recvsize; -- max recv size 400 */ 401 402 extern SVCXPRT *svc_dg_create(const int, const u_int, const u_int); 403 /* 404 * const int fd; -- open connection 405 * const u_int sendsize; -- max send size 406 * const u_int recvsize; -- max recv size 407 */ 408 409 410 /* 411 * the routine takes any *open* connection 412 * descriptor as its first input and is used for open connections. 413 */ 414 extern SVCXPRT *svc_fd_create(const int, const u_int, const u_int); 415 /* 416 * const int fd; -- open connection end point 417 * const u_int sendsize; -- max send size 418 * const u_int recvsize; -- max recv size 419 */ 420 421 /* 422 * Memory based rpc (for speed check and testing) 423 */ 424 extern SVCXPRT *svc_raw_create(void); 425 426 /* 427 * svc_dg_enable_cache() enables the cache on dg transports. 428 */ 429 int svc_dg_enablecache(SVCXPRT *, const u_int); 430 431 __END_DECLS 432 433 434 /* for backward compatibility */ 435 #include <rpc/svc_soc.h> 436 437 #endif /* !_RPC_SVC_H_ */ 438
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