1 /* $NetBSD: svc_vc.c,v 1.34 2015/11/10 20:56:20 christos Exp $ */
2
3 /*
4 * Copyright (c) 2010, Oracle America, Inc.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are
8 * met:
9 *
10 * * Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * * Redistributions in binary form must reproduce the above
13 * copyright notice, this list of conditions and the following
14 * disclaimer in the documentation and/or other materials
15 * provided with the distribution.
16 * * Neither the name of the "Oracle America, Inc." nor the names of its
17 * contributors may be used to endorse or promote products derived
18 * from this software without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
24 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
25 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
27 * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
29 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
30 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
31 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 */
33
34 #include <sys/cdefs.h>
35 #if defined(LIBC_SCCS) && !defined(lint)
36 #if 0
37 static char *sccsid = "@(#)svc_tcp.c 1.21 87/08/11 Copyr 1984 Sun Micro";
38 static char *sccsid = "@(#)svc_tcp.c 2.2 88/08/01 4.0 RPCSRC";
39 #else
40 __RCSID("$NetBSD: svc_vc.c,v 1.34 2015/11/10 20:56:20 christos Exp $");
41 #endif
42 #endif
43
44 /*
45 * svc_vc.c, Server side for Connection Oriented based RPC.
46 *
47 * Actually implements two flavors of transporter -
48 * a tcp rendezvouser (a listner and connection establisher)
49 * and a record/tcp stream.
50 */
51
52 #include "namespace.h"
53 #include "reentrant.h"
54 #include <sys/types.h>
55 #include <sys/param.h>
56 #include <sys/poll.h>
57 #include <sys/socket.h>
58 #include <sys/un.h>
59 #include <sys/time.h>
60 #include <netinet/in.h>
61
62 #include <assert.h>
63 #include <err.h>
64 #include <errno.h>
65 #include <fcntl.h>
66 #include <stdio.h>
67 #include <stdlib.h>
68 #include <string.h>
69 #include <unistd.h>
70
71 #include <rpc/rpc.h>
72
73 #include "svc_fdset.h"
74 #include "rpc_internal.h"
75
76 #ifdef __weak_alias
77 __weak_alias(svc_fd_create,_svc_fd_create)
78 __weak_alias(svc_vc_create,_svc_vc_create)
79 #endif
80
81 #ifdef _REENTRANT
82 extern rwlock_t svc_fd_lock;
83 #endif
84
85 static SVCXPRT *makefd_xprt(int, u_int, u_int);
86 static bool_t rendezvous_request(SVCXPRT *, struct rpc_msg *);
87 static enum xprt_stat rendezvous_stat(SVCXPRT *);
88 static void svc_vc_destroy(SVCXPRT *);
89 static void __svc_vc_dodestroy(SVCXPRT *);
90 static int read_vc(caddr_t, caddr_t, int);
91 static int write_vc(caddr_t, caddr_t, int);
92 static enum xprt_stat svc_vc_stat(SVCXPRT *);
93 static bool_t svc_vc_recv(SVCXPRT *, struct rpc_msg *);
94 static bool_t svc_vc_getargs(SVCXPRT *, xdrproc_t, caddr_t);
95 static bool_t svc_vc_freeargs(SVCXPRT *, xdrproc_t, caddr_t);
96 static bool_t svc_vc_reply(SVCXPRT *, struct rpc_msg *);
97 static void svc_vc_rendezvous_ops(SVCXPRT *);
98 static void svc_vc_ops(SVCXPRT *);
99 static bool_t svc_vc_control(SVCXPRT *, const u_int, void *);
100 static bool_t svc_vc_rendezvous_control(SVCXPRT *, const u_int, void *);
101
102 struct cf_rendezvous { /* kept in xprt->xp_p1 for rendezvouser */
103 u_int sendsize;
104 u_int recvsize;
105 int maxrec;
106 };
107
108 struct cf_conn { /* kept in xprt->xp_p1 for actual connection */
109 enum xprt_stat strm_stat;
110 u_int32_t x_id;
111 XDR xdrs;
112 char verf_body[MAX_AUTH_BYTES];
113 u_int sendsize;
114 u_int recvsize;
115 int maxrec;
116 bool_t nonblock;
117 struct timeval last_recv_time;
118 };
119
120 /*
121 * Usage:
122 * xprt = svc_vc_create(sock, send_buf_size, recv_buf_size);
123 *
124 * Creates, registers, and returns a (rpc) tcp based transporter.
125 * Once *xprt is initialized, it is registered as a transporter
126 * see (svc.h, xprt_register). This routine returns
127 * a NULL if a problem occurred.
128 *
129 * The filedescriptor passed in is expected to refer to a bound, but
130 * not yet connected socket.
131 *
132 * Since streams do buffered io similar to stdio, the caller can specify
133 * how big the send and receive buffers are via the second and third parms;
134 * 0 => use the system default.
135 */
136 SVCXPRT *
svc_vc_create(int fd,u_int sendsize,u_int recvsize)137 svc_vc_create(int fd, u_int sendsize, u_int recvsize)
138 {
139 SVCXPRT *xprt;
140 struct cf_rendezvous *r = NULL;
141 struct __rpc_sockinfo si;
142 struct sockaddr_storage sslocal;
143 socklen_t slen;
144 int one = 1;
145
146 if (!__rpc_fd2sockinfo(fd, &si))
147 return NULL;
148
149 r = mem_alloc(sizeof(*r));
150 if (r == NULL) {
151 warn("%s: out of memory", __func__);
152 return NULL;
153 }
154 r->sendsize = __rpc_get_t_size(si.si_af, si.si_proto, (int)sendsize);
155 r->recvsize = __rpc_get_t_size(si.si_af, si.si_proto, (int)recvsize);
156 r->maxrec = __svc_maxrec;
157 xprt = mem_alloc(sizeof(SVCXPRT));
158 if (xprt == NULL) {
159 warn("%s: out of memory", __func__);
160 goto cleanup_svc_vc_create;
161 }
162 xprt->xp_tp = NULL;
163 xprt->xp_p1 = (caddr_t)(void *)r;
164 xprt->xp_p2 = NULL;
165 xprt->xp_p3 = NULL;
166 xprt->xp_verf = _null_auth;
167 svc_vc_rendezvous_ops(xprt);
168 xprt->xp_port = (u_short)-1; /* It is the rendezvouser */
169 xprt->xp_fd = fd;
170
171 slen = sizeof (struct sockaddr_storage);
172 if (getsockname(fd, (struct sockaddr *)(void *)&sslocal, &slen) < 0) {
173 warn("%s: could not retrieve local addr", __func__);
174 goto cleanup_svc_vc_create;
175 }
176
177 /*
178 * We want to be able to check credentials on local sockets.
179 */
180 if (sslocal.ss_family == AF_LOCAL)
181 if (setsockopt(fd, 0, LOCAL_CREDS, &one, (socklen_t)sizeof one)
182 == -1)
183 goto cleanup_svc_vc_create;
184
185 xprt->xp_ltaddr.maxlen = xprt->xp_ltaddr.len = sslocal.ss_len;
186 xprt->xp_ltaddr.buf = mem_alloc((size_t)sslocal.ss_len);
187 if (xprt->xp_ltaddr.buf == NULL) {
188 warn("%s: out of memory", __func__);
189 goto cleanup_svc_vc_create;
190 }
191 memcpy(xprt->xp_ltaddr.buf, &sslocal, (size_t)sslocal.ss_len);
192
193 xprt->xp_rtaddr.maxlen = sizeof (struct sockaddr_storage);
194 if (!xprt_register(xprt))
195 goto cleanup_svc_vc_create;
196 return xprt;
197 cleanup_svc_vc_create:
198 if (xprt)
199 mem_free(xprt, sizeof(*xprt));
200 if (r != NULL)
201 mem_free(r, sizeof(*r));
202 return NULL;
203 }
204
205 /*
206 * Like svtcp_create(), except the routine takes any *open* UNIX file
207 * descriptor as its first input.
208 */
209 SVCXPRT *
svc_fd_create(int fd,u_int sendsize,u_int recvsize)210 svc_fd_create(int fd, u_int sendsize, u_int recvsize)
211 {
212 struct sockaddr_storage ss;
213 socklen_t slen;
214 SVCXPRT *ret;
215
216 _DIAGASSERT(fd != -1);
217
218 ret = makefd_xprt(fd, sendsize, recvsize);
219 if (ret == NULL)
220 return NULL;
221
222 slen = sizeof (struct sockaddr_storage);
223 if (getsockname(fd, (struct sockaddr *)(void *)&ss, &slen) < 0) {
224 warn("%s: could not retrieve local addr", __func__);
225 goto freedata;
226 }
227 ret->xp_ltaddr.maxlen = ret->xp_ltaddr.len = ss.ss_len;
228 ret->xp_ltaddr.buf = mem_alloc((size_t)ss.ss_len);
229 if (ret->xp_ltaddr.buf == NULL) {
230 warn("%s: out of memory", __func__);
231 goto freedata;
232 }
233 memcpy(ret->xp_ltaddr.buf, &ss, (size_t)ss.ss_len);
234
235 slen = sizeof (struct sockaddr_storage);
236 if (getpeername(fd, (struct sockaddr *)(void *)&ss, &slen) < 0) {
237 warn("%s: could not retrieve remote addr", __func__);
238 goto freedata;
239 }
240 ret->xp_rtaddr.maxlen = ret->xp_rtaddr.len = ss.ss_len;
241 ret->xp_rtaddr.buf = mem_alloc((size_t)ss.ss_len);
242 if (ret->xp_rtaddr.buf == NULL) {
243 warn("%s: out of memory", __func__);
244 goto freedata;
245 }
246 memcpy(ret->xp_rtaddr.buf, &ss, (size_t)ss.ss_len);
247 #ifdef PORTMAP
248 if (ss.ss_family == AF_INET) {
249 ret->xp_raddr = *(struct sockaddr_in *)ret->xp_rtaddr.buf;
250 ret->xp_addrlen = sizeof (struct sockaddr_in);
251 }
252 #endif
253
254 return ret;
255
256 freedata:
257 if (ret->xp_ltaddr.buf != NULL)
258 mem_free(ret->xp_ltaddr.buf, rep->xp_ltaddr.maxlen);
259
260 return NULL;
261 }
262
263 static SVCXPRT *
makefd_xprt(int fd,u_int sendsize,u_int recvsize)264 makefd_xprt(int fd, u_int sendsize, u_int recvsize)
265 {
266 SVCXPRT *xprt;
267 struct cf_conn *cd;
268 const char *netid;
269 struct __rpc_sockinfo si;
270
271 _DIAGASSERT(fd != -1);
272
273 xprt = mem_alloc(sizeof(SVCXPRT));
274 if (xprt == NULL)
275 goto outofmem;
276 memset(xprt, 0, sizeof *xprt);
277 cd = mem_alloc(sizeof(struct cf_conn));
278 if (cd == NULL)
279 goto outofmem;
280 cd->strm_stat = XPRT_IDLE;
281 xdrrec_create(&(cd->xdrs), sendsize, recvsize,
282 (caddr_t)(void *)xprt, read_vc, write_vc);
283 xprt->xp_p1 = (caddr_t)(void *)cd;
284 xprt->xp_verf.oa_base = cd->verf_body;
285 svc_vc_ops(xprt); /* truely deals with calls */
286 xprt->xp_port = 0; /* this is a connection, not a rendezvouser */
287 xprt->xp_fd = fd;
288 if (__rpc_fd2sockinfo(fd, &si) && __rpc_sockinfo2netid(&si, &netid))
289 if ((xprt->xp_netid = strdup(netid)) == NULL)
290 goto outofmem;
291
292 if (!xprt_register(xprt))
293 goto out;
294 return xprt;
295
296 outofmem:
297 warn("svc_tcp: makefd_xprt");
298 out:
299 if (xprt)
300 mem_free(xprt, sizeof(SVCXPRT));
301 return NULL;
302 }
303
304 /*ARGSUSED*/
305 static bool_t
rendezvous_request(SVCXPRT * xprt,struct rpc_msg * msg)306 rendezvous_request(SVCXPRT *xprt, struct rpc_msg *msg)
307 {
308 int sock, flags;
309 struct cf_rendezvous *r;
310 struct cf_conn *cd;
311 struct sockaddr_storage addr;
312 socklen_t len;
313 struct __rpc_sockinfo si;
314 SVCXPRT *newxprt;
315
316 _DIAGASSERT(xprt != NULL);
317 _DIAGASSERT(msg != NULL);
318
319 r = (struct cf_rendezvous *)xprt->xp_p1;
320 again:
321 len = sizeof addr;
322 if ((sock = accept(xprt->xp_fd, (struct sockaddr *)(void *)&addr,
323 &len)) < 0) {
324 if (errno == EINTR)
325 goto again;
326 /*
327 * Clean out the most idle file descriptor when we're
328 * running out.
329 */
330 if (errno == EMFILE || errno == ENFILE) {
331 if (__svc_clean_idle(NULL, 0, FALSE))
332 goto again;
333 }
334 return FALSE;
335 }
336 /*
337 * make a new transporter (re-uses xprt)
338 */
339 newxprt = makefd_xprt(sock, r->sendsize, r->recvsize);
340 if (newxprt == NULL)
341 goto out;
342 newxprt->xp_rtaddr.buf = mem_alloc(len);
343 if (newxprt->xp_rtaddr.buf == NULL)
344 goto out;
345 memcpy(newxprt->xp_rtaddr.buf, &addr, len);
346 newxprt->xp_rtaddr.len = len;
347 #ifdef PORTMAP
348 if (addr.ss_family == AF_INET) {
349 newxprt->xp_raddr = *(struct sockaddr_in *)newxprt->xp_rtaddr.buf;
350 newxprt->xp_addrlen = sizeof (struct sockaddr_in);
351 }
352 #endif
353 if (__rpc_fd2sockinfo(sock, &si))
354 __rpc_setnodelay(sock, &si);
355
356 cd = (struct cf_conn *)newxprt->xp_p1;
357
358 cd->recvsize = r->recvsize;
359 cd->sendsize = r->sendsize;
360 cd->maxrec = r->maxrec;
361
362 if (cd->maxrec != 0) {
363 flags = fcntl(sock, F_GETFL, 0);
364 if (flags == -1)
365 goto out;
366 if (fcntl(sock, F_SETFL, flags | O_NONBLOCK) == -1)
367 goto out;
368 if (cd->recvsize > (u_int)cd->maxrec)
369 cd->recvsize = cd->maxrec;
370 cd->nonblock = TRUE;
371 __xdrrec_setnonblock(&cd->xdrs, cd->maxrec);
372 } else
373 cd->nonblock = FALSE;
374
375 (void)gettimeofday(&cd->last_recv_time, NULL);
376
377 return FALSE; /* there is never an rpc msg to be processed */
378 out:
379 (void)close(sock);
380 return FALSE; /* there was an error */
381 }
382
383 /*ARGSUSED*/
384 static enum xprt_stat
rendezvous_stat(SVCXPRT * xprt)385 rendezvous_stat(SVCXPRT *xprt)
386 {
387
388 return XPRT_IDLE;
389 }
390
391 static void
svc_vc_destroy(SVCXPRT * xprt)392 svc_vc_destroy(SVCXPRT *xprt)
393 {
394 _DIAGASSERT(xprt != NULL);
395
396 xprt_unregister(xprt);
397 __svc_vc_dodestroy(xprt);
398 }
399
400 static void
__svc_vc_dodestroy(SVCXPRT * xprt)401 __svc_vc_dodestroy(SVCXPRT *xprt)
402 {
403 struct cf_conn *cd;
404 struct cf_rendezvous *r;
405
406 cd = (struct cf_conn *)xprt->xp_p1;
407
408 if (xprt->xp_fd != RPC_ANYFD)
409 (void)close(xprt->xp_fd);
410 if (xprt->xp_port != 0) {
411 /* a rendezvouser socket */
412 r = (struct cf_rendezvous *)xprt->xp_p1;
413 mem_free(r, sizeof (struct cf_rendezvous));
414 xprt->xp_port = 0;
415 } else {
416 /* an actual connection socket */
417 XDR_DESTROY(&(cd->xdrs));
418 mem_free(cd, sizeof(struct cf_conn));
419 }
420 if (xprt->xp_rtaddr.buf)
421 mem_free(xprt->xp_rtaddr.buf, xprt->xp_rtaddr.maxlen);
422 if (xprt->xp_ltaddr.buf)
423 mem_free(xprt->xp_ltaddr.buf, xprt->xp_ltaddr.maxlen);
424 if (xprt->xp_tp)
425 free(xprt->xp_tp);
426 if (xprt->xp_netid)
427 free(xprt->xp_netid);
428 mem_free(xprt, sizeof(SVCXPRT));
429 }
430
431 /*ARGSUSED*/
432 static bool_t
svc_vc_control(SVCXPRT * xprt,const u_int rq,void * in)433 svc_vc_control(SVCXPRT *xprt, const u_int rq, void *in)
434 {
435 return FALSE;
436 }
437
438 /*ARGSUSED*/
439 static bool_t
svc_vc_rendezvous_control(SVCXPRT * xprt,const u_int rq,void * in)440 svc_vc_rendezvous_control(SVCXPRT *xprt, const u_int rq, void *in)
441 {
442 struct cf_rendezvous *cfp;
443
444 cfp = (struct cf_rendezvous *)xprt->xp_p1;
445 if (cfp == NULL)
446 return FALSE;
447 switch (rq) {
448 case SVCGET_CONNMAXREC:
449 *(int *)in = cfp->maxrec;
450 break;
451 case SVCSET_CONNMAXREC:
452 cfp->maxrec = *(int *)in;
453 break;
454 default:
455 return FALSE;
456 }
457 return TRUE;
458 }
459
460 /*
461 * reads data from the tcp connection.
462 * any error is fatal and the connection is closed.
463 * (And a read of zero bytes is a half closed stream => error.)
464 * All read operations timeout after 35 seconds. A timeout is
465 * fatal for the connection.
466 */
467 static int
read_vc(caddr_t xprtp,caddr_t buf,int len)468 read_vc(caddr_t xprtp, caddr_t buf, int len)
469 {
470 SVCXPRT *xprt;
471 int sock;
472 struct pollfd pollfd;
473 struct sockaddr *sa;
474 struct msghdr msg;
475 struct cmsghdr *cmp;
476 void *crmsg = NULL;
477 struct sockcred *sc;
478 socklen_t crmsgsize;
479 struct cf_conn *cfp;
480 static const struct timespec ts = { 35, 0 };
481
482 xprt = (SVCXPRT *)(void *)xprtp;
483 _DIAGASSERT(xprt != NULL);
484
485 sock = xprt->xp_fd;
486
487 sa = (struct sockaddr *)xprt->xp_rtaddr.buf;
488 if (sa->sa_family == AF_LOCAL && xprt->xp_p2 == NULL) {
489 memset(&msg, 0, sizeof msg);
490 crmsgsize = CMSG_SPACE(SOCKCREDSIZE(NGROUPS));
491 crmsg = malloc(crmsgsize);
492 if (crmsg == NULL)
493 goto fatal_err;
494 memset(crmsg, 0, crmsgsize);
495
496 msg.msg_control = crmsg;
497 msg.msg_controllen = crmsgsize;
498
499 if (recvmsg(sock, &msg, 0) < 0)
500 goto fatal_err;
501
502 if (msg.msg_controllen == 0 ||
503 (msg.msg_flags & MSG_CTRUNC) != 0)
504 goto fatal_err;
505
506 cmp = CMSG_FIRSTHDR(&msg);
507 if (cmp->cmsg_level != SOL_SOCKET ||
508 cmp->cmsg_type != SCM_CREDS)
509 goto fatal_err;
510
511 sc = (struct sockcred *)(void *)CMSG_DATA(cmp);
512
513 xprt->xp_p2 = mem_alloc(SOCKCREDSIZE(sc->sc_ngroups));
514 if (xprt->xp_p2 == NULL)
515 goto fatal_err;
516
517 memcpy(xprt->xp_p2, sc, SOCKCREDSIZE(sc->sc_ngroups));
518 free(crmsg);
519 crmsg = NULL;
520 }
521
522 cfp = (struct cf_conn *)xprt->xp_p1;
523
524 if (cfp->nonblock) {
525 len = (int)read(sock, buf, (size_t)len);
526 if (len < 0) {
527 if (errno == EAGAIN)
528 len = 0;
529 else
530 goto fatal_err;
531 }
532 if (len != 0)
533 gettimeofday(&cfp->last_recv_time, NULL);
534 return len;
535 }
536
537 do {
538 pollfd.fd = sock;
539 pollfd.events = POLLIN;
540 switch (pollts(&pollfd, 1, &ts, NULL)) {
541 case -1:
542 if (errno == EINTR) {
543 continue;
544 }
545 /*FALLTHROUGH*/
546 case 0:
547 goto fatal_err;
548
549 default:
550 break;
551 }
552 } while ((pollfd.revents & POLLIN) == 0);
553
554 if ((len = (int)read(sock, buf, (size_t)len)) > 0) {
555 gettimeofday(&cfp->last_recv_time, NULL);
556 return len;
557 }
558
559 fatal_err:
560 if (crmsg != NULL)
561 free(crmsg);
562 ((struct cf_conn *)(xprt->xp_p1))->strm_stat = XPRT_DIED;
563 return -1;
564 }
565
566 /*
567 * writes data to the tcp connection.
568 * Any error is fatal and the connection is closed.
569 */
570 static int
write_vc(caddr_t xprtp,caddr_t buf,int len)571 write_vc(caddr_t xprtp, caddr_t buf, int len)
572 {
573 SVCXPRT *xprt;
574 int i, cnt;
575 struct cf_conn *cd;
576 struct timeval tv0, tv1;
577
578 xprt = (SVCXPRT *)(void *)xprtp;
579 _DIAGASSERT(xprt != NULL);
580
581 cd = (struct cf_conn *)xprt->xp_p1;
582
583 if (cd->nonblock)
584 gettimeofday(&tv0, NULL);
585
586 for (cnt = len; cnt > 0; cnt -= i, buf += i) {
587 if ((i = (int)write(xprt->xp_fd, buf, (size_t)cnt)) < 0) {
588 if (errno != EAGAIN || !cd->nonblock) {
589 cd->strm_stat = XPRT_DIED;
590 return -1;
591 }
592 if (cd->nonblock) {
593 /*
594 * For non-blocking connections, do not
595 * take more than 2 seconds writing the
596 * data out.
597 *
598 * XXX 2 is an arbitrary amount.
599 */
600 gettimeofday(&tv1, NULL);
601 if (tv1.tv_sec - tv0.tv_sec >= 2) {
602 cd->strm_stat = XPRT_DIED;
603 return -1;
604 }
605 }
606 i = 0;
607 }
608 }
609 return len;
610 }
611
612 static enum xprt_stat
svc_vc_stat(SVCXPRT * xprt)613 svc_vc_stat(SVCXPRT *xprt)
614 {
615 struct cf_conn *cd;
616
617 _DIAGASSERT(xprt != NULL);
618
619 cd = (struct cf_conn *)(xprt->xp_p1);
620
621 if (cd->strm_stat == XPRT_DIED)
622 return XPRT_DIED;
623 if (! xdrrec_eof(&(cd->xdrs)))
624 return XPRT_MOREREQS;
625 return XPRT_IDLE;
626 }
627
628 static bool_t
svc_vc_recv(SVCXPRT * xprt,struct rpc_msg * msg)629 svc_vc_recv(SVCXPRT *xprt, struct rpc_msg *msg)
630 {
631 struct cf_conn *cd;
632 XDR *xdrs;
633
634 _DIAGASSERT(xprt != NULL);
635 _DIAGASSERT(msg != NULL);
636
637 cd = (struct cf_conn *)(xprt->xp_p1);
638 xdrs = &(cd->xdrs);
639
640 if (cd->nonblock) {
641 if (!__xdrrec_getrec(xdrs, &cd->strm_stat, TRUE))
642 return FALSE;
643 }
644
645 xdrs->x_op = XDR_DECODE;
646 (void)xdrrec_skiprecord(xdrs);
647
648 if (xdr_callmsg(xdrs, msg)) {
649 cd->x_id = msg->rm_xid;
650 return TRUE;
651 }
652 cd->strm_stat = XPRT_DIED;
653 return FALSE;
654 }
655
656 static bool_t
svc_vc_getargs(SVCXPRT * xprt,xdrproc_t xdr_args,caddr_t args_ptr)657 svc_vc_getargs(SVCXPRT *xprt, xdrproc_t xdr_args, caddr_t args_ptr)
658 {
659
660 _DIAGASSERT(xprt != NULL);
661 /* args_ptr may be NULL */
662
663 return (*xdr_args)(&(((struct cf_conn *)(xprt->xp_p1))->xdrs),
664 args_ptr);
665 }
666
667 static bool_t
svc_vc_freeargs(SVCXPRT * xprt,xdrproc_t xdr_args,caddr_t args_ptr)668 svc_vc_freeargs(SVCXPRT *xprt, xdrproc_t xdr_args, caddr_t args_ptr)
669 {
670 XDR *xdrs;
671
672 _DIAGASSERT(xprt != NULL);
673 /* args_ptr may be NULL */
674
675 xdrs = &(((struct cf_conn *)(xprt->xp_p1))->xdrs);
676
677 xdrs->x_op = XDR_FREE;
678 return (*xdr_args)(xdrs, args_ptr);
679 }
680
681 static bool_t
svc_vc_reply(SVCXPRT * xprt,struct rpc_msg * msg)682 svc_vc_reply(SVCXPRT *xprt, struct rpc_msg *msg)
683 {
684 struct cf_conn *cd;
685 XDR *xdrs;
686 bool_t rstat;
687
688 _DIAGASSERT(xprt != NULL);
689 _DIAGASSERT(msg != NULL);
690
691 cd = (struct cf_conn *)(xprt->xp_p1);
692 xdrs = &(cd->xdrs);
693
694 xdrs->x_op = XDR_ENCODE;
695 msg->rm_xid = cd->x_id;
696 rstat = xdr_replymsg(xdrs, msg);
697 (void)xdrrec_endofrecord(xdrs, TRUE);
698 return rstat;
699 }
700
701 static void
svc_vc_ops(SVCXPRT * xprt)702 svc_vc_ops(SVCXPRT *xprt)
703 {
704 static struct xp_ops ops;
705 static struct xp_ops2 ops2;
706 #ifdef _REENTRANT
707 extern mutex_t ops_lock;
708 #endif
709
710 /* VARIABLES PROTECTED BY ops_lock: ops, ops2 */
711
712 mutex_lock(&ops_lock);
713 if (ops.xp_recv == NULL) {
714 ops.xp_recv = svc_vc_recv;
715 ops.xp_stat = svc_vc_stat;
716 ops.xp_getargs = svc_vc_getargs;
717 ops.xp_reply = svc_vc_reply;
718 ops.xp_freeargs = svc_vc_freeargs;
719 ops.xp_destroy = svc_vc_destroy;
720 ops2.xp_control = svc_vc_control;
721 }
722 xprt->xp_ops = &ops;
723 xprt->xp_ops2 = &ops2;
724 mutex_unlock(&ops_lock);
725 }
726
727 static void
svc_vc_rendezvous_ops(SVCXPRT * xprt)728 svc_vc_rendezvous_ops(SVCXPRT *xprt)
729 {
730 static struct xp_ops ops;
731 static struct xp_ops2 ops2;
732 #ifdef _REENTRANT
733 extern mutex_t ops_lock;
734 #endif
735 mutex_lock(&ops_lock);
736 if (ops.xp_recv == NULL) {
737 ops.xp_recv = rendezvous_request;
738 ops.xp_stat = rendezvous_stat;
739 ops.xp_getargs =
740 (bool_t (*)(SVCXPRT *, xdrproc_t, caddr_t))abort;
741 ops.xp_reply =
742 (bool_t (*)(SVCXPRT *, struct rpc_msg *))abort;
743 ops.xp_freeargs =
744 (bool_t (*)(SVCXPRT *, xdrproc_t, caddr_t))abort;
745 ops.xp_destroy = svc_vc_destroy;
746 ops2.xp_control = svc_vc_rendezvous_control;
747 }
748 xprt->xp_ops = &ops;
749 xprt->xp_ops2 = &ops2;
750 mutex_unlock(&ops_lock);
751 }
752
753 /*
754 * Destroy xprts that have not have had any activity in 'timeout' seconds.
755 * If 'cleanblock' is true, blocking connections (the default) are also
756 * cleaned. If timeout is 0, the least active connection is picked.
757 */
758 bool_t
759 /*ARGSUSED1*/
__svc_clean_idle(fd_set * fds __unused,int timeout,bool_t cleanblock)760 __svc_clean_idle(fd_set *fds __unused, int timeout, bool_t cleanblock)
761 {
762 int i, ncleaned, *fdmax;
763 SVCXPRT *xprt, *least_active;
764 struct timeval tv, tdiff, tmax;
765 struct cf_conn *cd;
766
767 gettimeofday(&tv, NULL);
768 tmax.tv_sec = tmax.tv_usec = 0;
769 least_active = NULL;
770 rwlock_wrlock(&svc_fd_lock);
771 fdmax = svc_fdset_getmax();
772 if (fdmax == NULL)
773 return FALSE;
774 for (i = ncleaned = 0; i <= *fdmax; i++) {
775 switch (svc_fdset_isset(i)) {
776 case 0:
777 case -1:
778 continue;
779 default:
780 break;
781 }
782
783 xprt = __svc_xports[i];
784 if (xprt == NULL || xprt->xp_ops == NULL ||
785 xprt->xp_ops->xp_recv != svc_vc_recv)
786 continue;
787
788 cd = (struct cf_conn *)xprt->xp_p1;
789 if (!cleanblock && !cd->nonblock)
790 continue;
791
792 if (timeout == 0) {
793 timersub(&tv, &cd->last_recv_time, &tdiff);
794 if (timercmp(&tdiff, &tmax, >)) {
795 tmax = tdiff;
796 least_active = xprt;
797 }
798 continue;
799 }
800
801 if (tv.tv_sec - cd->last_recv_time.tv_sec > timeout) {
802 __xprt_unregister_unlocked(xprt);
803 __svc_vc_dodestroy(xprt);
804 ncleaned++;
805 }
806 }
807 if (timeout == 0 && least_active != NULL) {
808 __xprt_unregister_unlocked(least_active);
809 __svc_vc_dodestroy(least_active);
810 ncleaned++;
811 }
812 rwlock_unlock(&svc_fd_lock);
813 return ncleaned > 0 ? TRUE : FALSE;
814 }
815