1 /* $NetBSD: svc_vc.c,v 1.37 2024/01/23 17:24:38 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 1.37 2024/01/23 17:24:38 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 listener 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 static SVCXPRT *makefd_xprt(int, u_int, u_int);
82 static bool_t rendezvous_request(SVCXPRT *, struct rpc_msg *);
83 static enum xprt_stat rendezvous_stat(SVCXPRT *);
84 static void svc_vc_destroy(SVCXPRT *);
85 static void __svc_vc_dodestroy(SVCXPRT *);
86 static int read_vc(caddr_t, caddr_t, int);
87 static int write_vc(caddr_t, caddr_t, int);
88 static enum xprt_stat svc_vc_stat(SVCXPRT *);
89 static bool_t svc_vc_recv(SVCXPRT *, struct rpc_msg *);
90 static bool_t svc_vc_getargs(SVCXPRT *, xdrproc_t, caddr_t);
91 static bool_t svc_vc_freeargs(SVCXPRT *, xdrproc_t, caddr_t);
92 static bool_t svc_vc_reply(SVCXPRT *, struct rpc_msg *);
93 static void svc_vc_rendezvous_ops(SVCXPRT *);
94 static void svc_vc_ops(SVCXPRT *);
95 static bool_t svc_vc_control(SVCXPRT *, const u_int, void *);
96 static bool_t svc_vc_rendezvous_control(SVCXPRT *, const u_int, void *);
97
98 struct cf_rendezvous { /* kept in xprt->xp_p1 for rendezvouser */
99 u_int sendsize;
100 u_int recvsize;
101 int maxrec;
102 };
103
104 struct cf_conn { /* kept in xprt->xp_p1 for actual connection */
105 enum xprt_stat strm_stat;
106 u_int32_t x_id;
107 XDR xdrs;
108 char verf_body[MAX_AUTH_BYTES];
109 u_int sendsize;
110 u_int recvsize;
111 int maxrec;
112 bool_t nonblock;
113 struct timeval last_recv_time;
114 };
115
116 /*
117 * Usage:
118 * xprt = svc_vc_create(sock, send_buf_size, recv_buf_size);
119 *
120 * Creates, registers, and returns a (rpc) tcp based transporter.
121 * Once *xprt is initialized, it is registered as a transporter
122 * see (svc.h, xprt_register). This routine returns
123 * a NULL if a problem occurred.
124 *
125 * The filedescriptor passed in is expected to refer to a bound, but
126 * not yet connected socket.
127 *
128 * Since streams do buffered io similar to stdio, the caller can specify
129 * how big the send and receive buffers are via the second and third parms;
130 * 0 => use the system default.
131 */
132 SVCXPRT *
svc_vc_create(int fd,u_int sendsize,u_int recvsize)133 svc_vc_create(int fd, u_int sendsize, u_int recvsize)
134 {
135 SVCXPRT *xprt;
136 struct cf_rendezvous *r = NULL;
137 struct __rpc_sockinfo si;
138 struct sockaddr_storage sslocal;
139 socklen_t slen;
140 int one = 1;
141
142 if (!__rpc_fd2sockinfo(fd, &si))
143 return NULL;
144
145 r = mem_alloc(sizeof(*r));
146 if (r == NULL) {
147 warn("%s: out of memory", __func__);
148 return NULL;
149 }
150 r->sendsize = __rpc_get_t_size(si.si_af, si.si_proto, (int)sendsize);
151 r->recvsize = __rpc_get_t_size(si.si_af, si.si_proto, (int)recvsize);
152 r->maxrec = __svc_maxrec;
153 xprt = mem_alloc(sizeof(SVCXPRT));
154 if (xprt == NULL) {
155 warn("%s: out of memory", __func__);
156 goto cleanup_svc_vc_create;
157 }
158 xprt->xp_tp = NULL;
159 xprt->xp_p1 = (caddr_t)(void *)r;
160 xprt->xp_p2 = NULL;
161 xprt->xp_p3 = NULL;
162 xprt->xp_verf = _null_auth;
163 svc_vc_rendezvous_ops(xprt);
164 xprt->xp_port = (u_short)-1; /* It is the rendezvouser */
165 xprt->xp_fd = fd;
166
167 slen = sizeof (struct sockaddr_storage);
168 if (getsockname(fd, (struct sockaddr *)(void *)&sslocal, &slen) < 0) {
169 warn("%s: could not retrieve local addr", __func__);
170 goto cleanup_svc_vc_create;
171 }
172
173 /*
174 * We want to be able to check credentials on local sockets.
175 */
176 if (sslocal.ss_family == AF_LOCAL)
177 if (setsockopt(fd, SOL_LOCAL, LOCAL_CREDS, &one,
178 (socklen_t)sizeof one) == -1)
179 goto cleanup_svc_vc_create;
180
181 xprt->xp_ltaddr.maxlen = xprt->xp_ltaddr.len = sslocal.ss_len;
182 xprt->xp_ltaddr.buf = mem_alloc((size_t)sslocal.ss_len);
183 if (xprt->xp_ltaddr.buf == NULL) {
184 warn("%s: out of memory", __func__);
185 goto cleanup_svc_vc_create;
186 }
187 memcpy(xprt->xp_ltaddr.buf, &sslocal, (size_t)sslocal.ss_len);
188
189 xprt->xp_rtaddr.maxlen = sizeof (struct sockaddr_storage);
190 if (!xprt_register(xprt))
191 goto cleanup_svc_vc_create;
192 return xprt;
193 cleanup_svc_vc_create:
194 if (xprt)
195 mem_free(xprt, sizeof(*xprt));
196 if (r != NULL)
197 mem_free(r, sizeof(*r));
198 return NULL;
199 }
200
201 /*
202 * Like svtcp_create(), except the routine takes any *open* UNIX file
203 * descriptor as its first input.
204 */
205 SVCXPRT *
svc_fd_create(int fd,u_int sendsize,u_int recvsize)206 svc_fd_create(int fd, u_int sendsize, u_int recvsize)
207 {
208 struct sockaddr_storage ss;
209 socklen_t slen;
210 SVCXPRT *ret;
211
212 _DIAGASSERT(fd != -1);
213
214 ret = makefd_xprt(fd, sendsize, recvsize);
215 if (ret == NULL)
216 return NULL;
217
218 slen = sizeof (struct sockaddr_storage);
219 if (getsockname(fd, (struct sockaddr *)(void *)&ss, &slen) < 0) {
220 warn("%s: could not retrieve local addr", __func__);
221 goto freedata;
222 }
223 ret->xp_ltaddr.maxlen = ret->xp_ltaddr.len = ss.ss_len;
224 ret->xp_ltaddr.buf = mem_alloc((size_t)ss.ss_len);
225 if (ret->xp_ltaddr.buf == NULL) {
226 warn("%s: out of memory", __func__);
227 goto freedata;
228 }
229 memcpy(ret->xp_ltaddr.buf, &ss, (size_t)ss.ss_len);
230
231 slen = sizeof (struct sockaddr_storage);
232 if (getpeername(fd, (struct sockaddr *)(void *)&ss, &slen) < 0) {
233 warn("%s: could not retrieve remote addr", __func__);
234 goto freedata;
235 }
236 ret->xp_rtaddr.maxlen = ret->xp_rtaddr.len = ss.ss_len;
237 ret->xp_rtaddr.buf = mem_alloc((size_t)ss.ss_len);
238 if (ret->xp_rtaddr.buf == NULL) {
239 warn("%s: out of memory", __func__);
240 goto freedata;
241 }
242 memcpy(ret->xp_rtaddr.buf, &ss, (size_t)ss.ss_len);
243 #ifdef PORTMAP
244 if (ss.ss_family == AF_INET) {
245 ret->xp_raddr = *(struct sockaddr_in *)ret->xp_rtaddr.buf;
246 ret->xp_addrlen = sizeof (struct sockaddr_in);
247 }
248 #endif
249
250 return ret;
251
252 freedata:
253 if (ret->xp_ltaddr.buf != NULL)
254 mem_free(ret->xp_ltaddr.buf, rep->xp_ltaddr.maxlen);
255
256 return NULL;
257 }
258
259 static SVCXPRT *
makefd_xprt(int fd,u_int sendsize,u_int recvsize)260 makefd_xprt(int fd, u_int sendsize, u_int recvsize)
261 {
262 SVCXPRT *xprt;
263 struct cf_conn *cd;
264 const char *netid;
265 struct __rpc_sockinfo si;
266
267 _DIAGASSERT(fd != -1);
268
269 xprt = mem_alloc(sizeof(SVCXPRT));
270 if (xprt == NULL)
271 goto outofmem;
272 memset(xprt, 0, sizeof *xprt);
273 cd = mem_alloc(sizeof(struct cf_conn));
274 if (cd == NULL)
275 goto outofmem;
276 cd->strm_stat = XPRT_IDLE;
277 xdrrec_create(&(cd->xdrs), sendsize, recvsize,
278 (caddr_t)(void *)xprt, read_vc, write_vc);
279 xprt->xp_p1 = (caddr_t)(void *)cd;
280 xprt->xp_verf.oa_base = cd->verf_body;
281 svc_vc_ops(xprt); /* truely deals with calls */
282 xprt->xp_port = 0; /* this is a connection, not a rendezvouser */
283 xprt->xp_fd = fd;
284 if (__rpc_fd2sockinfo(fd, &si) && __rpc_sockinfo2netid(&si, &netid))
285 if ((xprt->xp_netid = strdup(netid)) == NULL)
286 goto outofmem;
287
288 if (!xprt_register(xprt))
289 goto out;
290 return xprt;
291
292 outofmem:
293 warn("svc_tcp: makefd_xprt");
294 out:
295 if (xprt)
296 mem_free(xprt, sizeof(SVCXPRT));
297 return NULL;
298 }
299
300 /*ARGSUSED*/
301 static bool_t
rendezvous_request(SVCXPRT * xprt,struct rpc_msg * msg)302 rendezvous_request(SVCXPRT *xprt, struct rpc_msg *msg)
303 {
304 int sock, flags;
305 struct cf_rendezvous *r;
306 struct cf_conn *cd;
307 struct sockaddr_storage addr;
308 socklen_t len;
309 struct __rpc_sockinfo si;
310 SVCXPRT *newxprt;
311
312 _DIAGASSERT(xprt != NULL);
313 _DIAGASSERT(msg != NULL);
314
315 r = (struct cf_rendezvous *)xprt->xp_p1;
316 again:
317 len = sizeof addr;
318 if ((sock = accept(xprt->xp_fd, (struct sockaddr *)(void *)&addr,
319 &len)) < 0) {
320 if (errno == EINTR)
321 goto again;
322 /*
323 * Clean out the most idle file descriptor when we're
324 * running out.
325 */
326 if (errno == EMFILE || errno == ENFILE) {
327 if (__svc_clean_idle(NULL, 0, FALSE))
328 goto again;
329 }
330 return FALSE;
331 }
332 /*
333 * make a new transporter (re-uses xprt)
334 */
335 newxprt = makefd_xprt(sock, r->sendsize, r->recvsize);
336 if (newxprt == NULL)
337 goto out;
338 newxprt->xp_rtaddr.buf = mem_alloc(len);
339 if (newxprt->xp_rtaddr.buf == NULL)
340 goto out;
341 memcpy(newxprt->xp_rtaddr.buf, &addr, len);
342 newxprt->xp_rtaddr.len = len;
343 #ifdef PORTMAP
344 if (addr.ss_family == AF_INET) {
345 newxprt->xp_raddr = *(struct sockaddr_in *)newxprt->xp_rtaddr.buf;
346 newxprt->xp_addrlen = sizeof (struct sockaddr_in);
347 }
348 #endif
349 if (__rpc_fd2sockinfo(sock, &si))
350 __rpc_setnodelay(sock, &si);
351
352 cd = (struct cf_conn *)newxprt->xp_p1;
353
354 cd->recvsize = r->recvsize;
355 cd->sendsize = r->sendsize;
356 cd->maxrec = r->maxrec;
357
358 if (cd->maxrec != 0) {
359 flags = fcntl(sock, F_GETFL, 0);
360 if (flags == -1)
361 goto out;
362 if (fcntl(sock, F_SETFL, flags | O_NONBLOCK) == -1)
363 goto out;
364 if (cd->recvsize > (u_int)cd->maxrec)
365 cd->recvsize = cd->maxrec;
366 cd->nonblock = TRUE;
367 __xdrrec_setnonblock(&cd->xdrs, cd->maxrec);
368 } else
369 cd->nonblock = FALSE;
370
371 (void)gettimeofday(&cd->last_recv_time, NULL);
372
373 return FALSE; /* there is never an rpc msg to be processed */
374 out:
375 (void)close(sock);
376 return FALSE; /* there was an error */
377 }
378
379 /*ARGSUSED*/
380 static enum xprt_stat
rendezvous_stat(SVCXPRT * xprt)381 rendezvous_stat(SVCXPRT *xprt)
382 {
383
384 return XPRT_IDLE;
385 }
386
387 static void
svc_vc_destroy(SVCXPRT * xprt)388 svc_vc_destroy(SVCXPRT *xprt)
389 {
390 _DIAGASSERT(xprt != NULL);
391
392 xprt_unregister(xprt);
393 __svc_vc_dodestroy(xprt);
394 }
395
396 static void
__svc_vc_dodestroy(SVCXPRT * xprt)397 __svc_vc_dodestroy(SVCXPRT *xprt)
398 {
399 struct cf_conn *cd;
400 struct cf_rendezvous *r;
401
402 cd = (struct cf_conn *)xprt->xp_p1;
403
404 if (xprt->xp_fd != RPC_ANYFD)
405 (void)close(xprt->xp_fd);
406 if (xprt->xp_port != 0) {
407 /* a rendezvouser socket */
408 r = (struct cf_rendezvous *)xprt->xp_p1;
409 mem_free(r, sizeof (struct cf_rendezvous));
410 xprt->xp_port = 0;
411 } else {
412 /* an actual connection socket */
413 XDR_DESTROY(&(cd->xdrs));
414 mem_free(cd, sizeof(struct cf_conn));
415 }
416 if (xprt->xp_rtaddr.buf)
417 mem_free(xprt->xp_rtaddr.buf, xprt->xp_rtaddr.maxlen);
418 if (xprt->xp_ltaddr.buf)
419 mem_free(xprt->xp_ltaddr.buf, xprt->xp_ltaddr.maxlen);
420 if (xprt->xp_tp)
421 free(xprt->xp_tp);
422 if (xprt->xp_netid)
423 free(xprt->xp_netid);
424 mem_free(xprt, sizeof(SVCXPRT));
425 }
426
427 /*ARGSUSED*/
428 static bool_t
svc_vc_control(SVCXPRT * xprt,const u_int rq,void * in)429 svc_vc_control(SVCXPRT *xprt, const u_int rq, void *in)
430 {
431 return FALSE;
432 }
433
434 /*ARGSUSED*/
435 static bool_t
svc_vc_rendezvous_control(SVCXPRT * xprt,const u_int rq,void * in)436 svc_vc_rendezvous_control(SVCXPRT *xprt, const u_int rq, void *in)
437 {
438 struct cf_rendezvous *cfp;
439
440 cfp = (struct cf_rendezvous *)xprt->xp_p1;
441 if (cfp == NULL)
442 return FALSE;
443 switch (rq) {
444 case SVCGET_CONNMAXREC:
445 *(int *)in = cfp->maxrec;
446 break;
447 case SVCSET_CONNMAXREC:
448 cfp->maxrec = *(int *)in;
449 break;
450 default:
451 return FALSE;
452 }
453 return TRUE;
454 }
455
456 /*
457 * reads data from the tcp connection.
458 * any error is fatal and the connection is closed.
459 * (And a read of zero bytes is a half closed stream => error.)
460 * All read operations timeout after 35 seconds. A timeout is
461 * fatal for the connection.
462 */
463 static int
read_vc(caddr_t xprtp,caddr_t buf,int len)464 read_vc(caddr_t xprtp, caddr_t buf, int len)
465 {
466 SVCXPRT *xprt;
467 int sock;
468 struct pollfd pollfd;
469 struct sockaddr *sa;
470 struct msghdr msg;
471 struct cmsghdr *cmp;
472 void *crmsg = NULL;
473 struct sockcred *sc;
474 socklen_t crmsgsize;
475 struct cf_conn *cfp;
476 static const struct timespec ts = { 35, 0 };
477
478 xprt = (SVCXPRT *)(void *)xprtp;
479 _DIAGASSERT(xprt != NULL);
480
481 sock = xprt->xp_fd;
482
483 sa = (struct sockaddr *)xprt->xp_rtaddr.buf;
484 if (sa->sa_family == AF_LOCAL && xprt->xp_p2 == NULL) {
485 memset(&msg, 0, sizeof msg);
486 crmsgsize = CMSG_SPACE(SOCKCREDSIZE(NGROUPS));
487 crmsg = malloc(crmsgsize);
488 if (crmsg == NULL)
489 goto fatal_err;
490 memset(crmsg, 0, crmsgsize);
491
492 msg.msg_control = crmsg;
493 msg.msg_controllen = crmsgsize;
494
495 if (recvmsg(sock, &msg, 0) < 0)
496 goto fatal_err;
497
498 if (msg.msg_controllen == 0 ||
499 (msg.msg_flags & MSG_CTRUNC) != 0)
500 goto fatal_err;
501
502 cmp = CMSG_FIRSTHDR(&msg);
503 if (cmp->cmsg_level != SOL_SOCKET ||
504 cmp->cmsg_type != SCM_CREDS)
505 goto fatal_err;
506
507 sc = (struct sockcred *)(void *)CMSG_DATA(cmp);
508
509 xprt->xp_p2 = mem_alloc(SOCKCREDSIZE(sc->sc_ngroups));
510 if (xprt->xp_p2 == NULL)
511 goto fatal_err;
512
513 memcpy(xprt->xp_p2, sc, SOCKCREDSIZE(sc->sc_ngroups));
514 free(crmsg);
515 crmsg = NULL;
516 }
517
518 cfp = (struct cf_conn *)xprt->xp_p1;
519
520 if (cfp->nonblock) {
521 len = (int)read(sock, buf, (size_t)len);
522 if (len < 0) {
523 if (errno == EAGAIN)
524 len = 0;
525 else
526 goto fatal_err;
527 }
528 if (len != 0)
529 gettimeofday(&cfp->last_recv_time, NULL);
530 return len;
531 }
532
533 do {
534 pollfd.fd = sock;
535 pollfd.events = POLLIN;
536 switch (pollts(&pollfd, 1, &ts, NULL)) {
537 case -1:
538 if (errno == EINTR) {
539 continue;
540 }
541 /*FALLTHROUGH*/
542 case 0:
543 goto fatal_err;
544
545 default:
546 break;
547 }
548 } while ((pollfd.revents & POLLIN) == 0);
549
550 if ((len = (int)read(sock, buf, (size_t)len)) > 0) {
551 gettimeofday(&cfp->last_recv_time, NULL);
552 return len;
553 }
554
555 fatal_err:
556 if (crmsg != NULL)
557 free(crmsg);
558 ((struct cf_conn *)(xprt->xp_p1))->strm_stat = XPRT_DIED;
559 return -1;
560 }
561
562 /*
563 * writes data to the tcp connection.
564 * Any error is fatal and the connection is closed.
565 */
566 static int
write_vc(caddr_t xprtp,caddr_t buf,int len)567 write_vc(caddr_t xprtp, caddr_t buf, int len)
568 {
569 SVCXPRT *xprt;
570 int i, cnt;
571 struct cf_conn *cd;
572 struct timeval tv0, tv1;
573
574 xprt = (SVCXPRT *)(void *)xprtp;
575 _DIAGASSERT(xprt != NULL);
576
577 cd = (struct cf_conn *)xprt->xp_p1;
578
579 if (cd->nonblock)
580 gettimeofday(&tv0, NULL);
581
582 for (cnt = len; cnt > 0; cnt -= i, buf += i) {
583 if ((i = (int)write(xprt->xp_fd, buf, (size_t)cnt)) < 0) {
584 if (errno != EAGAIN || !cd->nonblock) {
585 cd->strm_stat = XPRT_DIED;
586 return -1;
587 }
588 if (cd->nonblock) {
589 /*
590 * For non-blocking connections, do not
591 * take more than 2 seconds writing the
592 * data out.
593 *
594 * XXX 2 is an arbitrary amount.
595 */
596 gettimeofday(&tv1, NULL);
597 if (tv1.tv_sec - tv0.tv_sec >= 2) {
598 cd->strm_stat = XPRT_DIED;
599 return -1;
600 }
601 }
602 i = 0;
603 }
604 }
605 return len;
606 }
607
608 static enum xprt_stat
svc_vc_stat(SVCXPRT * xprt)609 svc_vc_stat(SVCXPRT *xprt)
610 {
611 struct cf_conn *cd;
612
613 _DIAGASSERT(xprt != NULL);
614
615 cd = (struct cf_conn *)(xprt->xp_p1);
616
617 if (cd->strm_stat == XPRT_DIED)
618 return XPRT_DIED;
619 if (! xdrrec_eof(&(cd->xdrs)))
620 return XPRT_MOREREQS;
621 return XPRT_IDLE;
622 }
623
624 static bool_t
svc_vc_recv(SVCXPRT * xprt,struct rpc_msg * msg)625 svc_vc_recv(SVCXPRT *xprt, struct rpc_msg *msg)
626 {
627 struct cf_conn *cd;
628 XDR *xdrs;
629
630 _DIAGASSERT(xprt != NULL);
631 _DIAGASSERT(msg != NULL);
632
633 cd = (struct cf_conn *)(xprt->xp_p1);
634 xdrs = &(cd->xdrs);
635
636 if (cd->nonblock) {
637 if (!__xdrrec_getrec(xdrs, &cd->strm_stat, TRUE))
638 return FALSE;
639 }
640
641 xdrs->x_op = XDR_DECODE;
642 (void)xdrrec_skiprecord(xdrs);
643
644 if (xdr_callmsg(xdrs, msg)) {
645 cd->x_id = msg->rm_xid;
646 return TRUE;
647 }
648 cd->strm_stat = XPRT_DIED;
649 return FALSE;
650 }
651
652 static bool_t
svc_vc_getargs(SVCXPRT * xprt,xdrproc_t xdr_args,caddr_t args_ptr)653 svc_vc_getargs(SVCXPRT *xprt, xdrproc_t xdr_args, caddr_t args_ptr)
654 {
655
656 _DIAGASSERT(xprt != NULL);
657 /* args_ptr may be NULL */
658
659 return (*xdr_args)(&(((struct cf_conn *)(xprt->xp_p1))->xdrs),
660 args_ptr);
661 }
662
663 static bool_t
svc_vc_freeargs(SVCXPRT * xprt,xdrproc_t xdr_args,caddr_t args_ptr)664 svc_vc_freeargs(SVCXPRT *xprt, xdrproc_t xdr_args, caddr_t args_ptr)
665 {
666 XDR *xdrs;
667
668 _DIAGASSERT(xprt != NULL);
669 /* args_ptr may be NULL */
670
671 xdrs = &(((struct cf_conn *)(xprt->xp_p1))->xdrs);
672
673 xdrs->x_op = XDR_FREE;
674 return (*xdr_args)(xdrs, args_ptr);
675 }
676
677 static bool_t
svc_vc_reply(SVCXPRT * xprt,struct rpc_msg * msg)678 svc_vc_reply(SVCXPRT *xprt, struct rpc_msg *msg)
679 {
680 struct cf_conn *cd;
681 XDR *xdrs;
682 bool_t rstat;
683
684 _DIAGASSERT(xprt != NULL);
685 _DIAGASSERT(msg != NULL);
686
687 cd = (struct cf_conn *)(xprt->xp_p1);
688 xdrs = &(cd->xdrs);
689
690 xdrs->x_op = XDR_ENCODE;
691 msg->rm_xid = cd->x_id;
692 rstat = xdr_replymsg(xdrs, msg);
693 (void)xdrrec_endofrecord(xdrs, TRUE);
694 return rstat;
695 }
696
697 static void
svc_vc_ops(SVCXPRT * xprt)698 svc_vc_ops(SVCXPRT *xprt)
699 {
700 static struct xp_ops ops;
701 static struct xp_ops2 ops2;
702
703 /* VARIABLES PROTECTED BY ops_lock: ops, ops2 */
704
705 mutex_lock(&ops_lock);
706 if (ops.xp_recv == NULL) {
707 ops.xp_recv = svc_vc_recv;
708 ops.xp_stat = svc_vc_stat;
709 ops.xp_getargs = svc_vc_getargs;
710 ops.xp_reply = svc_vc_reply;
711 ops.xp_freeargs = svc_vc_freeargs;
712 ops.xp_destroy = svc_vc_destroy;
713 ops2.xp_control = svc_vc_control;
714 }
715 xprt->xp_ops = &ops;
716 xprt->xp_ops2 = &ops2;
717 mutex_unlock(&ops_lock);
718 }
719
720 static void
svc_vc_rendezvous_ops(SVCXPRT * xprt)721 svc_vc_rendezvous_ops(SVCXPRT *xprt)
722 {
723 static struct xp_ops ops;
724 static struct xp_ops2 ops2;
725
726 mutex_lock(&ops_lock);
727 if (ops.xp_recv == NULL) {
728 ops.xp_recv = rendezvous_request;
729 ops.xp_stat = rendezvous_stat;
730 ops.xp_getargs =
731 (bool_t (*)(SVCXPRT *, xdrproc_t, caddr_t))abort;
732 ops.xp_reply =
733 (bool_t (*)(SVCXPRT *, struct rpc_msg *))abort;
734 ops.xp_freeargs =
735 (bool_t (*)(SVCXPRT *, xdrproc_t, caddr_t))abort;
736 ops.xp_destroy = svc_vc_destroy;
737 ops2.xp_control = svc_vc_rendezvous_control;
738 }
739 xprt->xp_ops = &ops;
740 xprt->xp_ops2 = &ops2;
741 mutex_unlock(&ops_lock);
742 }
743
744 /*
745 * Destroy xprts that have not have had any activity in 'timeout' seconds.
746 * If 'cleanblock' is true, blocking connections (the default) are also
747 * cleaned. If timeout is 0, the least active connection is picked.
748 */
749 bool_t
750 /*ARGSUSED1*/
__svc_clean_idle(fd_set * fds __unused,int timeout,bool_t cleanblock)751 __svc_clean_idle(fd_set *fds __unused, int timeout, bool_t cleanblock)
752 {
753 int i, ncleaned, *fdmax;
754 SVCXPRT *xprt, *least_active;
755 struct timeval tv, tdiff, tmax;
756 struct cf_conn *cd;
757
758 gettimeofday(&tv, NULL);
759 tmax.tv_sec = tmax.tv_usec = 0;
760 least_active = NULL;
761 rwlock_wrlock(&svc_fd_lock);
762 fdmax = svc_fdset_getmax();
763 if (fdmax == NULL)
764 return FALSE;
765 for (i = ncleaned = 0; i <= *fdmax; i++) {
766 switch (svc_fdset_isset(i)) {
767 case 0:
768 case -1:
769 continue;
770 default:
771 break;
772 }
773
774 xprt = __svc_xports[i];
775 if (xprt == NULL || xprt->xp_ops == NULL ||
776 xprt->xp_ops->xp_recv != svc_vc_recv)
777 continue;
778
779 cd = (struct cf_conn *)xprt->xp_p1;
780 if (!cleanblock && !cd->nonblock)
781 continue;
782
783 if (timeout == 0) {
784 timersub(&tv, &cd->last_recv_time, &tdiff);
785 if (timercmp(&tdiff, &tmax, >)) {
786 tmax = tdiff;
787 least_active = xprt;
788 }
789 continue;
790 }
791
792 if (tv.tv_sec - cd->last_recv_time.tv_sec > timeout) {
793 __xprt_unregister_unlocked(xprt);
794 __svc_vc_dodestroy(xprt);
795 ncleaned++;
796 }
797 }
798 if (timeout == 0 && least_active != NULL) {
799 __xprt_unregister_unlocked(least_active);
800 __svc_vc_dodestroy(least_active);
801 ncleaned++;
802 }
803 rwlock_unlock(&svc_fd_lock);
804 return ncleaned > 0 ? TRUE : FALSE;
805 }
806