2 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
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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.
42 #include "rpc_private.h"
44 #include <rpc/pmap_clnt.h>
47 /* used by svc_[max_]pollfd */
48 /* used by svc_fdset */
50 #ifdef __UCLIBC_HAS_THREADS__
51 #define xports (*(SVCXPRT ***)&RPC_THREAD_VARIABLE(svc_xports_s))
53 static SVCXPRT **xports;
56 #define NULL_SVC ((struct svc_callout *)0)
57 #define RQCRED_SIZE 400 /* this size is excessive */
60 Each entry represents a set of procedures (an rpc program).
61 The dispatch routine takes request structs and runs the
62 appropriate procedure. */
64 struct svc_callout *sc_next;
67 void (*sc_dispatch) (struct svc_req *, SVCXPRT *);
69 #ifdef __UCLIBC_HAS_THREADS__
70 #define svc_head (*(struct svc_callout **)&RPC_THREAD_VARIABLE(svc_head_s))
72 static struct svc_callout *svc_head;
75 /* *************** SVCXPRT related stuff **************** */
77 /* Activate a transport handle. */
79 xprt_register (SVCXPRT *xprt)
81 register int sock = xprt->xp_sock;
86 xports = (SVCXPRT **) malloc (_rpc_dtablesize () * sizeof (SVCXPRT *));
87 if (xports == NULL) /* DonĀ“t add handle */
91 if (sock < _rpc_dtablesize ())
94 if (sock < FD_SETSIZE)
95 FD_SET (sock, &svc_fdset);
97 /* Check if we have an empty slot */
98 for (i = 0; i < svc_max_pollfd; ++i)
99 if (svc_pollfd[i].fd == -1)
101 svc_pollfd[i].fd = sock;
102 svc_pollfd[i].events = (POLLIN | POLLPRI |
103 POLLRDNORM | POLLRDBAND);
108 svc_pollfd = realloc (svc_pollfd,
109 sizeof (struct pollfd) * svc_max_pollfd);
110 if (svc_pollfd == NULL) /* Out of memory */
113 svc_pollfd[svc_max_pollfd - 1].fd = sock;
114 svc_pollfd[svc_max_pollfd - 1].events = (POLLIN | POLLPRI |
115 POLLRDNORM | POLLRDBAND);
118 libc_hidden_def(xprt_register)
120 /* De-activate a transport handle. */
122 xprt_unregister (SVCXPRT *xprt)
124 register int sock = xprt->xp_sock;
127 if ((sock < _rpc_dtablesize ()) && (xports[sock] == xprt))
129 xports[sock] = (SVCXPRT *) 0;
131 if (sock < FD_SETSIZE)
132 FD_CLR (sock, &svc_fdset);
134 for (i = 0; i < svc_max_pollfd; ++i)
135 if (svc_pollfd[i].fd == sock)
136 svc_pollfd[i].fd = -1;
139 libc_hidden_def(xprt_unregister)
142 /* ********************** CALLOUT list related stuff ************* */
144 /* Search the callout list for a program number, return the callout
146 static struct svc_callout *
147 svc_find (rpcprog_t prog, rpcvers_t vers, struct svc_callout **prev)
149 register struct svc_callout *s, *p;
152 for (s = svc_head; s != NULL_SVC; s = s->sc_next)
154 if ((s->sc_prog == prog) && (s->sc_vers == vers))
163 /* Add a service program to the callout list.
164 The dispatch routine will be called when a rpc request for this
165 program number comes in. */
167 svc_register (SVCXPRT * xprt, rpcprog_t prog, rpcvers_t vers,
168 void (*dispatch) (struct svc_req *, SVCXPRT *),
171 struct svc_callout *prev;
172 register struct svc_callout *s;
174 if ((s = svc_find (prog, vers, &prev)) != NULL_SVC)
176 if (s->sc_dispatch == dispatch)
177 goto pmap_it; /* he is registering another xptr */
180 s = (struct svc_callout *) mem_alloc (sizeof (struct svc_callout));
181 if (s == (struct svc_callout *) 0)
186 s->sc_dispatch = dispatch;
187 s->sc_next = svc_head;
191 /* now register the information with the local binder service */
193 return pmap_set (prog, vers, protocol, xprt->xp_port);
197 libc_hidden_def(svc_register)
199 /* Remove a service program from the callout list. */
201 svc_unregister (rpcprog_t prog, rpcvers_t vers)
203 struct svc_callout *prev;
204 register struct svc_callout *s;
206 if ((s = svc_find (prog, vers, &prev)) == NULL_SVC)
209 if (prev == NULL_SVC)
210 svc_head = s->sc_next;
212 prev->sc_next = s->sc_next;
214 s->sc_next = NULL_SVC;
215 mem_free ((char *) s, (u_int) sizeof (struct svc_callout));
216 /* now unregister the information with the local binder service */
217 pmap_unset (prog, vers);
219 libc_hidden_def(svc_unregister)
221 /* ******************* REPLY GENERATION ROUTINES ************ */
223 /* Send a reply to an rpc request */
225 svc_sendreply (register SVCXPRT *xprt, xdrproc_t xdr_results,
226 caddr_t xdr_location)
230 rply.rm_direction = REPLY;
231 rply.rm_reply.rp_stat = MSG_ACCEPTED;
232 rply.acpted_rply.ar_verf = xprt->xp_verf;
233 rply.acpted_rply.ar_stat = SUCCESS;
234 rply.acpted_rply.ar_results.where = xdr_location;
235 rply.acpted_rply.ar_results.proc = xdr_results;
236 return SVC_REPLY (xprt, &rply);
238 libc_hidden_def(svc_sendreply)
240 /* No procedure error reply */
242 svcerr_noproc (register SVCXPRT *xprt)
246 rply.rm_direction = REPLY;
247 rply.rm_reply.rp_stat = MSG_ACCEPTED;
248 rply.acpted_rply.ar_verf = xprt->xp_verf;
249 rply.acpted_rply.ar_stat = PROC_UNAVAIL;
250 SVC_REPLY (xprt, &rply);
253 /* Can't decode args error reply */
255 svcerr_decode (register SVCXPRT *xprt)
259 rply.rm_direction = REPLY;
260 rply.rm_reply.rp_stat = MSG_ACCEPTED;
261 rply.acpted_rply.ar_verf = xprt->xp_verf;
262 rply.acpted_rply.ar_stat = GARBAGE_ARGS;
263 SVC_REPLY (xprt, &rply);
265 libc_hidden_def(svcerr_decode)
267 /* Some system error */
269 svcerr_systemerr (register SVCXPRT *xprt)
273 rply.rm_direction = REPLY;
274 rply.rm_reply.rp_stat = MSG_ACCEPTED;
275 rply.acpted_rply.ar_verf = xprt->xp_verf;
276 rply.acpted_rply.ar_stat = SYSTEM_ERR;
277 SVC_REPLY (xprt, &rply);
280 /* Authentication error reply */
282 svcerr_auth (SVCXPRT *xprt, enum auth_stat why)
286 rply.rm_direction = REPLY;
287 rply.rm_reply.rp_stat = MSG_DENIED;
288 rply.rjcted_rply.rj_stat = AUTH_ERROR;
289 rply.rjcted_rply.rj_why = why;
290 SVC_REPLY (xprt, &rply);
292 libc_hidden_def(svcerr_auth)
294 /* Auth too weak error reply */
296 svcerr_weakauth (SVCXPRT *xprt)
298 svcerr_auth (xprt, AUTH_TOOWEAK);
301 /* Program unavailable error reply */
303 svcerr_noprog (register SVCXPRT *xprt)
307 rply.rm_direction = REPLY;
308 rply.rm_reply.rp_stat = MSG_ACCEPTED;
309 rply.acpted_rply.ar_verf = xprt->xp_verf;
310 rply.acpted_rply.ar_stat = PROG_UNAVAIL;
311 SVC_REPLY (xprt, &rply);
313 libc_hidden_def(svcerr_noprog)
315 /* Program version mismatch error reply */
317 svcerr_progvers (register SVCXPRT *xprt, rpcvers_t low_vers,
322 rply.rm_direction = REPLY;
323 rply.rm_reply.rp_stat = MSG_ACCEPTED;
324 rply.acpted_rply.ar_verf = xprt->xp_verf;
325 rply.acpted_rply.ar_stat = PROG_MISMATCH;
326 rply.acpted_rply.ar_vers.low = low_vers;
327 rply.acpted_rply.ar_vers.high = high_vers;
328 SVC_REPLY (xprt, &rply);
330 libc_hidden_def(svcerr_progvers)
332 /* ******************* SERVER INPUT STUFF ******************* */
335 * Get server side input from some transport.
337 * Statement of authentication parameters management:
338 * This function owns and manages all authentication parameters, specifically
339 * the "raw" parameters (msg.rm_call.cb_cred and msg.rm_call.cb_verf) and
340 * the "cooked" credentials (rqst->rq_clntcred).
341 * However, this function does not know the structure of the cooked
342 * credentials, so it make the following assumptions:
343 * a) the structure is contiguous (no pointers), and
344 * b) the cred structure size does not exceed RQCRED_SIZE bytes.
345 * In all events, all three parameters are freed upon exit from this routine.
346 * The storage is trivially management on the call stack in user land, but
347 * is mallocated in kernel land.
351 svc_getreq_common (const int fd)
355 register SVCXPRT *xprt;
356 char cred_area[2 * MAX_AUTH_BYTES + RQCRED_SIZE];
357 msg.rm_call.cb_cred.oa_base = cred_area;
358 msg.rm_call.cb_verf.oa_base = &(cred_area[MAX_AUTH_BYTES]);
361 /* Do we control fd? */
365 /* now receive msgs from xprtprt (support batch calls) */
368 if (SVC_RECV (xprt, &msg))
370 /* now find the exported program and call it */
371 struct svc_callout *s;
378 r.rq_clntcred = &(cred_area[2 * MAX_AUTH_BYTES]);
380 r.rq_prog = msg.rm_call.cb_prog;
381 r.rq_vers = msg.rm_call.cb_vers;
382 r.rq_proc = msg.rm_call.cb_proc;
383 r.rq_cred = msg.rm_call.cb_cred;
385 /* first authenticate the message */
386 /* Check for null flavor and bypass these calls if possible */
388 if (msg.rm_call.cb_cred.oa_flavor == AUTH_NULL)
390 r.rq_xprt->xp_verf.oa_flavor = _null_auth.oa_flavor;
391 r.rq_xprt->xp_verf.oa_length = 0;
393 else if ((why = _authenticate (&r, &msg)) != AUTH_OK)
395 svcerr_auth (xprt, why);
399 /* now match message with a registered service */
404 for (s = svc_head; s != NULL_SVC; s = s->sc_next)
406 if (s->sc_prog == r.rq_prog)
408 if (s->sc_vers == r.rq_vers)
410 (*s->sc_dispatch) (&r, xprt);
413 /* found correct version */
415 if (s->sc_vers < low_vers)
416 low_vers = s->sc_vers;
417 if (s->sc_vers > high_vers)
418 high_vers = s->sc_vers;
420 /* found correct program */
422 /* if we got here, the program or version
425 svcerr_progvers (xprt, low_vers, high_vers);
427 svcerr_noprog (xprt);
428 /* Fall through to ... */
431 if ((stat = SVC_STAT (xprt)) == XPRT_DIED)
437 while (stat == XPRT_MOREREQS);
439 libc_hidden_def(svc_getreq_common)
442 svc_getreqset (fd_set *readfds)
444 register u_int32_t mask;
445 register u_int32_t *maskp;
446 register int setsize;
450 setsize = _rpc_dtablesize ();
451 if (setsize > FD_SETSIZE)
452 setsize = FD_SETSIZE;
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__ */