2 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
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4 * media and as a part of the software program in whole or part. Users
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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
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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__ */