2 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
3 * unrestricted use provided that this legend is included on all tape
4 * media and as a part of the software program in whole or part. Users
5 * may copy or modify Sun RPC without charge, but are not authorized
6 * to license or distribute it to anyone else except as part of a product or
7 * program developed by the user.
9 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
10 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
11 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
13 * Sun RPC is provided with no support and without any obligation on the
14 * part of Sun Microsystems, Inc. to assist in its use, correction,
15 * modification or enhancement.
17 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
18 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
19 * OR ANY PART THEREOF.
21 * In no event will Sun Microsystems, Inc. be liable for any lost revenue
22 * or profits or other special, indirect and consequential damages, even if
23 * Sun has been advised of the possibility of such damages.
25 * Sun Microsystems, Inc.
27 * Mountain View, California 94043
30 * svc.c, Server-side remote procedure call interface.
32 * There are two sets of procedures here. The xprt routines are
33 * for handling transport handles. The svc routines handle the
34 * list of service routines.
36 * Copyright (C) 1984, Sun Microsystems, Inc.
44 #include "rpc_private.h"
46 #include <rpc/pmap_clnt.h>
49 /* used by svc_[max_]pollfd */
50 /* used by svc_fdset */
52 #ifdef __UCLIBC_HAS_THREADS__
53 #define xports (*(SVCXPRT ***)&RPC_THREAD_VARIABLE(svc_xports_s))
55 static SVCXPRT
**xports
;
58 #define NULL_SVC ((struct svc_callout *)0)
59 #define RQCRED_SIZE 400 /* this size is excessive */
62 Each entry represents a set of procedures (an rpc program).
63 The dispatch routine takes request structs and runs the
64 appropriate procedure. */
66 struct svc_callout
*sc_next
;
69 void (*sc_dispatch
) (struct svc_req
*, SVCXPRT
*);
71 #ifdef __UCLIBC_HAS_THREADS__
72 #define svc_head (*(struct svc_callout **)&RPC_THREAD_VARIABLE(svc_head_s))
74 static struct svc_callout
*svc_head
;
77 /* *************** SVCXPRT related stuff **************** */
79 /* Activate a transport handle. */
81 xprt_register (SVCXPRT
*xprt
)
83 register int sock
= xprt
->xp_sock
;
88 xports
= (SVCXPRT
**) malloc (_rpc_dtablesize () * sizeof (SVCXPRT
*));
89 if (xports
== NULL
) /* DonĀ“t add handle */
93 if (sock
< _rpc_dtablesize ())
96 if (sock
< FD_SETSIZE
)
97 FD_SET (sock
, &svc_fdset
);
99 /* Check if we have an empty slot */
100 for (i
= 0; i
< svc_max_pollfd
; ++i
)
101 if (svc_pollfd
[i
].fd
== -1)
103 svc_pollfd
[i
].fd
= sock
;
104 svc_pollfd
[i
].events
= (POLLIN
| POLLPRI
|
105 POLLRDNORM
| POLLRDBAND
);
110 svc_pollfd
= realloc (svc_pollfd
,
111 sizeof (struct pollfd
) * svc_max_pollfd
);
112 if (svc_pollfd
== NULL
) /* Out of memory */
115 svc_pollfd
[svc_max_pollfd
- 1].fd
= sock
;
116 svc_pollfd
[svc_max_pollfd
- 1].events
= (POLLIN
| POLLPRI
|
117 POLLRDNORM
| POLLRDBAND
);
120 libc_hidden_def(xprt_register
)
122 /* De-activate a transport handle. */
124 xprt_unregister (SVCXPRT
*xprt
)
126 register int sock
= xprt
->xp_sock
;
129 if ((sock
< _rpc_dtablesize ()) && (xports
[sock
] == xprt
))
131 xports
[sock
] = (SVCXPRT
*) 0;
133 if (sock
< FD_SETSIZE
)
134 FD_CLR (sock
, &svc_fdset
);
136 for (i
= 0; i
< svc_max_pollfd
; ++i
)
137 if (svc_pollfd
[i
].fd
== sock
)
138 svc_pollfd
[i
].fd
= -1;
141 libc_hidden_def(xprt_unregister
)
144 /* ********************** CALLOUT list related stuff ************* */
146 /* Search the callout list for a program number, return the callout
148 static struct svc_callout
*
149 svc_find (rpcprog_t prog
, rpcvers_t vers
, struct svc_callout
**prev
)
151 register struct svc_callout
*s
, *p
;
154 for (s
= svc_head
; s
!= NULL_SVC
; s
= s
->sc_next
)
156 if ((s
->sc_prog
== prog
) && (s
->sc_vers
== vers
))
165 /* Add a service program to the callout list.
166 The dispatch routine will be called when a rpc request for this
167 program number comes in. */
169 svc_register (SVCXPRT
* xprt
, rpcprog_t prog
, rpcvers_t vers
,
170 void (*dispatch
) (struct svc_req
*, SVCXPRT
*),
173 struct svc_callout
*prev
;
174 register struct svc_callout
*s
;
176 if ((s
= svc_find (prog
, vers
, &prev
)) != NULL_SVC
)
178 if (s
->sc_dispatch
== dispatch
)
179 goto pmap_it
; /* he is registering another xptr */
182 s
= (struct svc_callout
*) mem_alloc (sizeof (struct svc_callout
));
183 if (s
== (struct svc_callout
*) 0)
188 s
->sc_dispatch
= dispatch
;
189 s
->sc_next
= svc_head
;
193 /* now register the information with the local binder service */
195 return pmap_set (prog
, vers
, protocol
, xprt
->xp_port
);
199 libc_hidden_def(svc_register
)
201 /* Remove a service program from the callout list. */
203 svc_unregister (rpcprog_t prog
, rpcvers_t vers
)
205 struct svc_callout
*prev
;
206 register struct svc_callout
*s
;
208 if ((s
= svc_find (prog
, vers
, &prev
)) == NULL_SVC
)
211 if (prev
== NULL_SVC
)
212 svc_head
= s
->sc_next
;
214 prev
->sc_next
= s
->sc_next
;
216 s
->sc_next
= NULL_SVC
;
217 mem_free ((char *) s
, (u_int
) sizeof (struct svc_callout
));
218 /* now unregister the information with the local binder service */
219 pmap_unset (prog
, vers
);
221 libc_hidden_def(svc_unregister
)
223 /* ******************* REPLY GENERATION ROUTINES ************ */
225 /* Send a reply to an rpc request */
227 svc_sendreply (register SVCXPRT
*xprt
, xdrproc_t xdr_results
,
228 caddr_t xdr_location
)
232 rply
.rm_direction
= REPLY
;
233 rply
.rm_reply
.rp_stat
= MSG_ACCEPTED
;
234 rply
.acpted_rply
.ar_verf
= xprt
->xp_verf
;
235 rply
.acpted_rply
.ar_stat
= SUCCESS
;
236 rply
.acpted_rply
.ar_results
.where
= xdr_location
;
237 rply
.acpted_rply
.ar_results
.proc
= xdr_results
;
238 return SVC_REPLY (xprt
, &rply
);
240 libc_hidden_def(svc_sendreply
)
242 /* No procedure error reply */
244 svcerr_noproc (register SVCXPRT
*xprt
)
248 rply
.rm_direction
= REPLY
;
249 rply
.rm_reply
.rp_stat
= MSG_ACCEPTED
;
250 rply
.acpted_rply
.ar_verf
= xprt
->xp_verf
;
251 rply
.acpted_rply
.ar_stat
= PROC_UNAVAIL
;
252 SVC_REPLY (xprt
, &rply
);
255 /* Can't decode args error reply */
257 svcerr_decode (register SVCXPRT
*xprt
)
261 rply
.rm_direction
= REPLY
;
262 rply
.rm_reply
.rp_stat
= MSG_ACCEPTED
;
263 rply
.acpted_rply
.ar_verf
= xprt
->xp_verf
;
264 rply
.acpted_rply
.ar_stat
= GARBAGE_ARGS
;
265 SVC_REPLY (xprt
, &rply
);
267 libc_hidden_def(svcerr_decode
)
269 /* Some system error */
271 svcerr_systemerr (register SVCXPRT
*xprt
)
275 rply
.rm_direction
= REPLY
;
276 rply
.rm_reply
.rp_stat
= MSG_ACCEPTED
;
277 rply
.acpted_rply
.ar_verf
= xprt
->xp_verf
;
278 rply
.acpted_rply
.ar_stat
= SYSTEM_ERR
;
279 SVC_REPLY (xprt
, &rply
);
282 /* Authentication error reply */
284 svcerr_auth (SVCXPRT
*xprt
, enum auth_stat why
)
288 rply
.rm_direction
= REPLY
;
289 rply
.rm_reply
.rp_stat
= MSG_DENIED
;
290 rply
.rjcted_rply
.rj_stat
= AUTH_ERROR
;
291 rply
.rjcted_rply
.rj_why
= why
;
292 SVC_REPLY (xprt
, &rply
);
294 libc_hidden_def(svcerr_auth
)
296 /* Auth too weak error reply */
298 svcerr_weakauth (SVCXPRT
*xprt
)
300 svcerr_auth (xprt
, AUTH_TOOWEAK
);
303 /* Program unavailable error reply */
305 svcerr_noprog (register SVCXPRT
*xprt
)
309 rply
.rm_direction
= REPLY
;
310 rply
.rm_reply
.rp_stat
= MSG_ACCEPTED
;
311 rply
.acpted_rply
.ar_verf
= xprt
->xp_verf
;
312 rply
.acpted_rply
.ar_stat
= PROG_UNAVAIL
;
313 SVC_REPLY (xprt
, &rply
);
315 libc_hidden_def(svcerr_noprog
)
317 /* Program version mismatch error reply */
319 svcerr_progvers (register SVCXPRT
*xprt
, rpcvers_t low_vers
,
324 rply
.rm_direction
= REPLY
;
325 rply
.rm_reply
.rp_stat
= MSG_ACCEPTED
;
326 rply
.acpted_rply
.ar_verf
= xprt
->xp_verf
;
327 rply
.acpted_rply
.ar_stat
= PROG_MISMATCH
;
328 rply
.acpted_rply
.ar_vers
.low
= low_vers
;
329 rply
.acpted_rply
.ar_vers
.high
= high_vers
;
330 SVC_REPLY (xprt
, &rply
);
332 libc_hidden_def(svcerr_progvers
)
334 /* ******************* SERVER INPUT STUFF ******************* */
337 * Get server side input from some transport.
339 * Statement of authentication parameters management:
340 * This function owns and manages all authentication parameters, specifically
341 * the "raw" parameters (msg.rm_call.cb_cred and msg.rm_call.cb_verf) and
342 * the "cooked" credentials (rqst->rq_clntcred).
343 * However, this function does not know the structure of the cooked
344 * credentials, so it make the following assumptions:
345 * a) the structure is contiguous (no pointers), and
346 * b) the cred structure size does not exceed RQCRED_SIZE bytes.
347 * In all events, all three parameters are freed upon exit from this routine.
348 * The storage is trivially management on the call stack in user land, but
349 * is mallocated in kernel land.
353 svc_getreq_common (const int fd
)
357 register SVCXPRT
*xprt
;
358 char cred_area
[2 * MAX_AUTH_BYTES
+ RQCRED_SIZE
];
359 msg
.rm_call
.cb_cred
.oa_base
= cred_area
;
360 msg
.rm_call
.cb_verf
.oa_base
= &(cred_area
[MAX_AUTH_BYTES
]);
363 /* Do we control fd? */
367 /* now receive msgs from xprtprt (support batch calls) */
370 if (SVC_RECV (xprt
, &msg
))
372 /* now find the exported program and call it */
373 struct svc_callout
*s
;
380 r
.rq_clntcred
= &(cred_area
[2 * MAX_AUTH_BYTES
]);
382 r
.rq_prog
= msg
.rm_call
.cb_prog
;
383 r
.rq_vers
= msg
.rm_call
.cb_vers
;
384 r
.rq_proc
= msg
.rm_call
.cb_proc
;
385 r
.rq_cred
= msg
.rm_call
.cb_cred
;
387 /* first authenticate the message */
388 /* Check for null flavor and bypass these calls if possible */
390 if (msg
.rm_call
.cb_cred
.oa_flavor
== AUTH_NULL
)
392 r
.rq_xprt
->xp_verf
.oa_flavor
= _null_auth
.oa_flavor
;
393 r
.rq_xprt
->xp_verf
.oa_length
= 0;
395 else if ((why
= _authenticate (&r
, &msg
)) != AUTH_OK
)
397 svcerr_auth (xprt
, why
);
401 /* now match message with a registered service */
406 for (s
= svc_head
; s
!= NULL_SVC
; s
= s
->sc_next
)
408 if (s
->sc_prog
== r
.rq_prog
)
410 if (s
->sc_vers
== r
.rq_vers
)
412 (*s
->sc_dispatch
) (&r
, xprt
);
415 /* found correct version */
417 if (s
->sc_vers
< low_vers
)
418 low_vers
= s
->sc_vers
;
419 if (s
->sc_vers
> high_vers
)
420 high_vers
= s
->sc_vers
;
422 /* found correct program */
424 /* if we got here, the program or version
427 svcerr_progvers (xprt
, low_vers
, high_vers
);
429 svcerr_noprog (xprt
);
430 /* Fall through to ... */
433 if ((stat
= SVC_STAT (xprt
)) == XPRT_DIED
)
439 while (stat
== XPRT_MOREREQS
);
441 libc_hidden_def(svc_getreq_common
)
444 svc_getreqset (fd_set
*readfds
)
446 register u_int32_t mask
;
447 register u_int32_t
*maskp
;
448 register int setsize
;
452 setsize
= _rpc_dtablesize ();
453 maskp
= (u_int32_t
*) readfds
->fds_bits
;
454 for (sock
= 0; sock
< setsize
; sock
+= 32)
455 for (mask
= *maskp
++; (bit
= ffs (mask
)); mask
^= (1 << (bit
- 1)))
456 svc_getreq_common (sock
+ bit
- 1);
458 libc_hidden_def(svc_getreqset
)
461 svc_getreq (int rdfds
)
466 readfds
.fds_bits
[0] = rdfds
;
467 svc_getreqset (&readfds
);
469 libc_hidden_def(svc_getreq
)
472 svc_getreq_poll (struct pollfd
*pfdp
, int pollretval
)
475 register int fds_found
;
477 for (i
= fds_found
= 0; i
< svc_max_pollfd
&& fds_found
< pollretval
; ++i
)
479 register struct pollfd
*p
= &pfdp
[i
];
481 if (p
->fd
!= -1 && p
->revents
)
483 /* fd has input waiting */
486 if (p
->revents
& POLLNVAL
)
487 xprt_unregister (xports
[p
->fd
]);
489 svc_getreq_common (p
->fd
);
493 libc_hidden_def(svc_getreq_poll
)
495 #ifdef __UCLIBC_HAS_THREADS__
497 void attribute_hidden
__rpc_thread_svc_cleanup (void)
499 struct svc_callout
*svcp
;
501 while ((svcp
= svc_head
) != NULL
)
502 svc_unregister (svcp
->sc_prog
, svcp
->sc_vers
);
505 #endif /* __UCLIBC_HAS_THREADS__ */