1 /* $NetBSD: svc_vc.c,v 1.7 2000/08/03 00:01:53 fvdl Exp $ */
2
3 /*-
4 * Copyright (c) 2009, Sun Microsystems, Inc.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions are met:
9 * - Redistributions of source code must retain the above copyright notice,
10 * this list of conditions and the following disclaimer.
11 * - Redistributions in binary form must reproduce the above copyright notice,
12 * this list of conditions and the following disclaimer in the documentation
13 * and/or other materials provided with the distribution.
14 * - Neither the name of Sun Microsystems, Inc. nor the names of its
15 * contributors may be used to endorse or promote products derived
16 * from this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
22 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
28 * POSSIBILITY OF SUCH DAMAGE.
29 */
30
31 #if defined(LIBC_SCCS) && !defined(lint)
32 static char *sccsid2 = "@(#)svc_tcp.c 1.21 87/08/11 Copyr 1984 Sun Micro";
33 static char *sccsid = "@(#)svc_tcp.c 2.2 88/08/01 4.0 RPCSRC";
34 #endif
35 #include <sys/cdefs.h>
36 __FBSDID("$FreeBSD: stable/9/lib/libc/rpc/svc_vc.c 291054 2015-11-19 03:53:31Z ngie $");
37
38 /*
39 * svc_vc.c, Server side for Connection Oriented based RPC.
40 *
41 * Actually implements two flavors of transporter -
42 * a tcp rendezvouser (a listner and connection establisher)
43 * and a record/tcp stream.
44 */
45
46 #include "namespace.h"
47 #include "reentrant.h"
48 #include <sys/types.h>
49 #include <sys/param.h>
50 #include <sys/poll.h>
51 #include <sys/socket.h>
52 #include <sys/un.h>
53 #include <sys/time.h>
54 #include <sys/uio.h>
55 #include <netinet/in.h>
56 #include <netinet/tcp.h>
57
58 #include <assert.h>
59 #include <err.h>
60 #include <errno.h>
61 #include <fcntl.h>
62 #include <stdio.h>
63 #include <stdlib.h>
64 #include <string.h>
65 #include <unistd.h>
66
67 #include <rpc/rpc.h>
68
69 #include "rpc_com.h"
70 #include "mt_misc.h"
71 #include "un-namespace.h"
72
73 static SVCXPRT *makefd_xprt(int, u_int, u_int);
74 static bool_t rendezvous_request(SVCXPRT *, struct rpc_msg *);
75 static enum xprt_stat rendezvous_stat(SVCXPRT *);
76 static void svc_vc_destroy(SVCXPRT *);
77 static void __svc_vc_dodestroy (SVCXPRT *);
78 static int read_vc(void *, void *, int);
79 static int write_vc(void *, void *, int);
80 static enum xprt_stat svc_vc_stat(SVCXPRT *);
81 static bool_t svc_vc_recv(SVCXPRT *, struct rpc_msg *);
82 static bool_t svc_vc_getargs(SVCXPRT *, xdrproc_t, void *);
83 static bool_t svc_vc_freeargs(SVCXPRT *, xdrproc_t, void *);
84 static bool_t svc_vc_reply(SVCXPRT *, struct rpc_msg *);
85 static void svc_vc_rendezvous_ops(SVCXPRT *);
86 static void svc_vc_ops(SVCXPRT *);
87 static bool_t svc_vc_control(SVCXPRT *xprt, const u_int rq, void *in);
88 static bool_t svc_vc_rendezvous_control (SVCXPRT *xprt, const u_int rq,
89 void *in);
90
91 struct cf_rendezvous { /* kept in xprt->xp_p1 for rendezvouser */
92 u_int sendsize;
93 u_int recvsize;
94 int maxrec;
95 };
96
97 struct cf_conn { /* kept in xprt->xp_p1 for actual connection */
98 enum xprt_stat strm_stat;
99 u_int32_t x_id;
100 XDR xdrs;
101 char verf_body[MAX_AUTH_BYTES];
102 u_int sendsize;
103 u_int recvsize;
104 int maxrec;
105 bool_t nonblock;
106 struct timeval last_recv_time;
107 };
108
109 /*
110 * Usage:
111 * xprt = svc_vc_create(sock, send_buf_size, recv_buf_size);
112 *
113 * Creates, registers, and returns a (rpc) tcp based transporter.
114 * Once *xprt is initialized, it is registered as a transporter
115 * see (svc.h, xprt_register). This routine returns
116 * a NULL if a problem occurred.
117 *
118 * The filedescriptor passed in is expected to refer to a bound, but
119 * not yet connected socket.
120 *
121 * Since streams do buffered io similar to stdio, the caller can specify
122 * how big the send and receive buffers are via the second and third parms;
123 * 0 => use the system default.
124 */
125 SVCXPRT *
svc_vc_create(fd,sendsize,recvsize)126 svc_vc_create(fd, sendsize, recvsize)
127 int fd;
128 u_int sendsize;
129 u_int recvsize;
130 {
131 SVCXPRT *xprt;
132 struct cf_rendezvous *r = NULL;
133 struct __rpc_sockinfo si;
134 struct sockaddr_storage sslocal;
135 socklen_t slen;
136
137 if (!__rpc_fd2sockinfo(fd, &si))
138 return NULL;
139
140 r = mem_alloc(sizeof(*r));
141 if (r == NULL) {
142 warnx("svc_vc_create: out of memory");
143 goto cleanup_svc_vc_create;
144 }
145 r->sendsize = __rpc_get_t_size(si.si_af, si.si_proto, (int)sendsize);
146 r->recvsize = __rpc_get_t_size(si.si_af, si.si_proto, (int)recvsize);
147 r->maxrec = __svc_maxrec;
148 xprt = svc_xprt_alloc();
149 if (xprt == NULL) {
150 warnx("svc_vc_create: out of memory");
151 goto cleanup_svc_vc_create;
152 }
153 xprt->xp_p1 = r;
154 xprt->xp_verf = _null_auth;
155 svc_vc_rendezvous_ops(xprt);
156 xprt->xp_port = (u_short)-1; /* It is the rendezvouser */
157 xprt->xp_fd = fd;
158
159 slen = sizeof (struct sockaddr_storage);
160 if (_getsockname(fd, (struct sockaddr *)(void *)&sslocal, &slen) < 0) {
161 warnx("svc_vc_create: could not retrieve local addr");
162 goto cleanup_svc_vc_create;
163 }
164
165 xprt->xp_ltaddr.maxlen = xprt->xp_ltaddr.len = sslocal.ss_len;
166 xprt->xp_ltaddr.buf = mem_alloc((size_t)sslocal.ss_len);
167 if (xprt->xp_ltaddr.buf == NULL) {
168 warnx("svc_vc_create: no mem for local addr");
169 goto cleanup_svc_vc_create;
170 }
171 memcpy(xprt->xp_ltaddr.buf, &sslocal, (size_t)sslocal.ss_len);
172
173 xprt->xp_rtaddr.maxlen = sizeof (struct sockaddr_storage);
174 xprt_register(xprt);
175 return (xprt);
176 cleanup_svc_vc_create:
177 if (xprt)
178 mem_free(xprt, sizeof(*xprt));
179 if (r != NULL)
180 mem_free(r, sizeof(*r));
181 return (NULL);
182 }
183
184 /*
185 * Like svtcp_create(), except the routine takes any *open* UNIX file
186 * descriptor as its first input.
187 */
188 SVCXPRT *
svc_fd_create(fd,sendsize,recvsize)189 svc_fd_create(fd, sendsize, recvsize)
190 int fd;
191 u_int sendsize;
192 u_int recvsize;
193 {
194 struct sockaddr_storage ss;
195 socklen_t slen;
196 SVCXPRT *ret;
197
198 assert(fd != -1);
199
200 ret = makefd_xprt(fd, sendsize, recvsize);
201 if (ret == NULL)
202 return NULL;
203
204 slen = sizeof (struct sockaddr_storage);
205 if (_getsockname(fd, (struct sockaddr *)(void *)&ss, &slen) < 0) {
206 warnx("svc_fd_create: could not retrieve local addr");
207 goto freedata;
208 }
209 ret->xp_ltaddr.maxlen = ret->xp_ltaddr.len = ss.ss_len;
210 ret->xp_ltaddr.buf = mem_alloc((size_t)ss.ss_len);
211 if (ret->xp_ltaddr.buf == NULL) {
212 warnx("svc_fd_create: no mem for local addr");
213 goto freedata;
214 }
215 memcpy(ret->xp_ltaddr.buf, &ss, (size_t)ss.ss_len);
216
217 slen = sizeof (struct sockaddr_storage);
218 if (_getpeername(fd, (struct sockaddr *)(void *)&ss, &slen) < 0) {
219 warnx("svc_fd_create: could not retrieve remote addr");
220 goto freedata;
221 }
222 ret->xp_rtaddr.maxlen = ret->xp_rtaddr.len = ss.ss_len;
223 ret->xp_rtaddr.buf = mem_alloc((size_t)ss.ss_len);
224 if (ret->xp_rtaddr.buf == NULL) {
225 warnx("svc_fd_create: no mem for local addr");
226 goto freedata;
227 }
228 memcpy(ret->xp_rtaddr.buf, &ss, (size_t)ss.ss_len);
229 #ifdef PORTMAP
230 if (ss.ss_family == AF_INET || ss.ss_family == AF_LOCAL) {
231 ret->xp_raddr = *(struct sockaddr_in *)ret->xp_rtaddr.buf;
232 ret->xp_addrlen = sizeof (struct sockaddr_in);
233 }
234 #endif /* PORTMAP */
235
236 return ret;
237
238 freedata:
239 if (ret->xp_ltaddr.buf != NULL)
240 mem_free(ret->xp_ltaddr.buf, rep->xp_ltaddr.maxlen);
241
242 return NULL;
243 }
244
245 static SVCXPRT *
makefd_xprt(fd,sendsize,recvsize)246 makefd_xprt(fd, sendsize, recvsize)
247 int fd;
248 u_int sendsize;
249 u_int recvsize;
250 {
251 SVCXPRT *xprt;
252 struct cf_conn *cd;
253 const char *netid;
254 struct __rpc_sockinfo si;
255
256 assert(fd != -1);
257
258 xprt = svc_xprt_alloc();
259 if (xprt == NULL) {
260 warnx("svc_vc: makefd_xprt: out of memory");
261 goto done;
262 }
263 cd = mem_alloc(sizeof(struct cf_conn));
264 if (cd == NULL) {
265 warnx("svc_tcp: makefd_xprt: out of memory");
266 svc_xprt_free(xprt);
267 xprt = NULL;
268 goto done;
269 }
270 cd->strm_stat = XPRT_IDLE;
271 xdrrec_create(&(cd->xdrs), sendsize, recvsize,
272 xprt, read_vc, write_vc);
273 xprt->xp_p1 = cd;
274 xprt->xp_verf.oa_base = cd->verf_body;
275 svc_vc_ops(xprt); /* truely deals with calls */
276 xprt->xp_port = 0; /* this is a connection, not a rendezvouser */
277 xprt->xp_fd = fd;
278 if (__rpc_fd2sockinfo(fd, &si) && __rpc_sockinfo2netid(&si, &netid))
279 xprt->xp_netid = strdup(netid);
280
281 xprt_register(xprt);
282 done:
283 return (xprt);
284 }
285
286 /*ARGSUSED*/
287 static bool_t
rendezvous_request(xprt,msg)288 rendezvous_request(xprt, msg)
289 SVCXPRT *xprt;
290 struct rpc_msg *msg;
291 {
292 int sock, flags;
293 struct cf_rendezvous *r;
294 struct cf_conn *cd;
295 struct sockaddr_storage addr;
296 socklen_t len;
297 struct __rpc_sockinfo si;
298 SVCXPRT *newxprt;
299 fd_set cleanfds;
300
301 assert(xprt != NULL);
302 assert(msg != NULL);
303
304 r = (struct cf_rendezvous *)xprt->xp_p1;
305 again:
306 len = sizeof addr;
307 if ((sock = _accept(xprt->xp_fd, (struct sockaddr *)(void *)&addr,
308 &len)) < 0) {
309 if (errno == EINTR)
310 goto again;
311 /*
312 * Clean out the most idle file descriptor when we're
313 * running out.
314 */
315 if (errno == EMFILE || errno == ENFILE) {
316 cleanfds = svc_fdset;
317 __svc_clean_idle(&cleanfds, 0, FALSE);
318 goto again;
319 }
320 return (FALSE);
321 }
322 /*
323 * make a new transporter (re-uses xprt)
324 */
325 newxprt = makefd_xprt(sock, r->sendsize, r->recvsize);
326 newxprt->xp_rtaddr.buf = mem_alloc(len);
327 if (newxprt->xp_rtaddr.buf == NULL)
328 return (FALSE);
329 memcpy(newxprt->xp_rtaddr.buf, &addr, len);
330 newxprt->xp_rtaddr.len = len;
331 #ifdef PORTMAP
332 if (addr.ss_family == AF_INET || addr.ss_family == AF_LOCAL) {
333 newxprt->xp_raddr = *(struct sockaddr_in *)newxprt->xp_rtaddr.buf;
334 newxprt->xp_addrlen = sizeof (struct sockaddr_in);
335 }
336 #endif /* PORTMAP */
337 if (__rpc_fd2sockinfo(sock, &si) && si.si_proto == IPPROTO_TCP) {
338 len = 1;
339 /* XXX fvdl - is this useful? */
340 _setsockopt(sock, IPPROTO_TCP, TCP_NODELAY, &len, sizeof (len));
341 }
342
343 cd = (struct cf_conn *)newxprt->xp_p1;
344
345 cd->recvsize = r->recvsize;
346 cd->sendsize = r->sendsize;
347 cd->maxrec = r->maxrec;
348
349 if (cd->maxrec != 0) {
350 flags = _fcntl(sock, F_GETFL, 0);
351 if (flags == -1)
352 return (FALSE);
353 if (_fcntl(sock, F_SETFL, flags | O_NONBLOCK) == -1)
354 return (FALSE);
355 if (cd->recvsize > cd->maxrec)
356 cd->recvsize = cd->maxrec;
357 cd->nonblock = TRUE;
358 __xdrrec_setnonblock(&cd->xdrs, cd->maxrec);
359 } else
360 cd->nonblock = FALSE;
361
362 gettimeofday(&cd->last_recv_time, NULL);
363
364 return (FALSE); /* there is never an rpc msg to be processed */
365 }
366
367 /*ARGSUSED*/
368 static enum xprt_stat
rendezvous_stat(xprt)369 rendezvous_stat(xprt)
370 SVCXPRT *xprt;
371 {
372
373 return (XPRT_IDLE);
374 }
375
376 static void
svc_vc_destroy(xprt)377 svc_vc_destroy(xprt)
378 SVCXPRT *xprt;
379 {
380 assert(xprt != NULL);
381
382 xprt_unregister(xprt);
383 __svc_vc_dodestroy(xprt);
384 }
385
386 static void
__svc_vc_dodestroy(xprt)387 __svc_vc_dodestroy(xprt)
388 SVCXPRT *xprt;
389 {
390 struct cf_conn *cd;
391 struct cf_rendezvous *r;
392
393 cd = (struct cf_conn *)xprt->xp_p1;
394
395 if (xprt->xp_fd != RPC_ANYFD)
396 (void)_close(xprt->xp_fd);
397 if (xprt->xp_port != 0) {
398 /* a rendezvouser socket */
399 r = (struct cf_rendezvous *)xprt->xp_p1;
400 mem_free(r, sizeof (struct cf_rendezvous));
401 xprt->xp_port = 0;
402 } else {
403 /* an actual connection socket */
404 XDR_DESTROY(&(cd->xdrs));
405 mem_free(cd, sizeof(struct cf_conn));
406 }
407 if (xprt->xp_rtaddr.buf)
408 mem_free(xprt->xp_rtaddr.buf, xprt->xp_rtaddr.maxlen);
409 if (xprt->xp_ltaddr.buf)
410 mem_free(xprt->xp_ltaddr.buf, xprt->xp_ltaddr.maxlen);
411 free(xprt->xp_tp);
412 free(xprt->xp_netid);
413 svc_xprt_free(xprt);
414 }
415
416 /*ARGSUSED*/
417 static bool_t
svc_vc_control(xprt,rq,in)418 svc_vc_control(xprt, rq, in)
419 SVCXPRT *xprt;
420 const u_int rq;
421 void *in;
422 {
423 return (FALSE);
424 }
425
426 static bool_t
svc_vc_rendezvous_control(xprt,rq,in)427 svc_vc_rendezvous_control(xprt, rq, in)
428 SVCXPRT *xprt;
429 const u_int rq;
430 void *in;
431 {
432 struct cf_rendezvous *cfp;
433
434 cfp = (struct cf_rendezvous *)xprt->xp_p1;
435 if (cfp == NULL)
436 return (FALSE);
437 switch (rq) {
438 case SVCGET_CONNMAXREC:
439 *(int *)in = cfp->maxrec;
440 break;
441 case SVCSET_CONNMAXREC:
442 cfp->maxrec = *(int *)in;
443 break;
444 default:
445 return (FALSE);
446 }
447 return (TRUE);
448 }
449
450 /*
451 * reads data from the tcp or uip connection.
452 * any error is fatal and the connection is closed.
453 * (And a read of zero bytes is a half closed stream => error.)
454 * All read operations timeout after 35 seconds. A timeout is
455 * fatal for the connection.
456 */
457 static int
read_vc(xprtp,buf,len)458 read_vc(xprtp, buf, len)
459 void *xprtp;
460 void *buf;
461 int len;
462 {
463 SVCXPRT *xprt;
464 int sock;
465 int milliseconds = 35 * 1000;
466 struct pollfd pollfd;
467 struct cf_conn *cfp;
468
469 xprt = (SVCXPRT *)xprtp;
470 assert(xprt != NULL);
471
472 sock = xprt->xp_fd;
473
474 cfp = (struct cf_conn *)xprt->xp_p1;
475
476 if (cfp->nonblock) {
477 len = _read(sock, buf, (size_t)len);
478 if (len < 0) {
479 if (errno == EAGAIN)
480 len = 0;
481 else
482 goto fatal_err;
483 }
484 if (len != 0)
485 gettimeofday(&cfp->last_recv_time, NULL);
486 return len;
487 }
488
489 do {
490 pollfd.fd = sock;
491 pollfd.events = POLLIN;
492 pollfd.revents = 0;
493 switch (_poll(&pollfd, 1, milliseconds)) {
494 case -1:
495 if (errno == EINTR)
496 continue;
497 /*FALLTHROUGH*/
498 case 0:
499 goto fatal_err;
500
501 default:
502 break;
503 }
504 } while ((pollfd.revents & POLLIN) == 0);
505
506 if ((len = _read(sock, buf, (size_t)len)) > 0) {
507 gettimeofday(&cfp->last_recv_time, NULL);
508 return (len);
509 }
510
511 fatal_err:
512 ((struct cf_conn *)(xprt->xp_p1))->strm_stat = XPRT_DIED;
513 return (-1);
514 }
515
516 /*
517 * writes data to the tcp connection.
518 * Any error is fatal and the connection is closed.
519 */
520 static int
write_vc(xprtp,buf,len)521 write_vc(xprtp, buf, len)
522 void *xprtp;
523 void *buf;
524 int len;
525 {
526 SVCXPRT *xprt;
527 int i, cnt;
528 struct cf_conn *cd;
529 struct timeval tv0, tv1;
530
531 xprt = (SVCXPRT *)xprtp;
532 assert(xprt != NULL);
533
534 cd = (struct cf_conn *)xprt->xp_p1;
535
536 if (cd->nonblock)
537 gettimeofday(&tv0, NULL);
538
539 for (cnt = len; cnt > 0; cnt -= i, buf = (char *)buf + i) {
540 i = _write(xprt->xp_fd, buf, (size_t)cnt);
541 if (i < 0) {
542 if (errno != EAGAIN || !cd->nonblock) {
543 cd->strm_stat = XPRT_DIED;
544 return (-1);
545 }
546 if (cd->nonblock) {
547 /*
548 * For non-blocking connections, do not
549 * take more than 2 seconds writing the
550 * data out.
551 *
552 * XXX 2 is an arbitrary amount.
553 */
554 gettimeofday(&tv1, NULL);
555 if (tv1.tv_sec - tv0.tv_sec >= 2) {
556 cd->strm_stat = XPRT_DIED;
557 return (-1);
558 }
559 }
560 i = 0;
561 }
562 }
563
564 return (len);
565 }
566
567 static enum xprt_stat
svc_vc_stat(xprt)568 svc_vc_stat(xprt)
569 SVCXPRT *xprt;
570 {
571 struct cf_conn *cd;
572
573 assert(xprt != NULL);
574
575 cd = (struct cf_conn *)(xprt->xp_p1);
576
577 if (cd->strm_stat == XPRT_DIED)
578 return (XPRT_DIED);
579 if (! xdrrec_eof(&(cd->xdrs)))
580 return (XPRT_MOREREQS);
581 return (XPRT_IDLE);
582 }
583
584 static bool_t
svc_vc_recv(xprt,msg)585 svc_vc_recv(xprt, msg)
586 SVCXPRT *xprt;
587 struct rpc_msg *msg;
588 {
589 struct cf_conn *cd;
590 XDR *xdrs;
591
592 assert(xprt != NULL);
593 assert(msg != NULL);
594
595 cd = (struct cf_conn *)(xprt->xp_p1);
596 xdrs = &(cd->xdrs);
597
598 if (cd->nonblock) {
599 if (!__xdrrec_getrec(xdrs, &cd->strm_stat, TRUE))
600 return FALSE;
601 } else {
602 (void)xdrrec_skiprecord(xdrs);
603 }
604
605 xdrs->x_op = XDR_DECODE;
606 if (xdr_callmsg(xdrs, msg)) {
607 cd->x_id = msg->rm_xid;
608 return (TRUE);
609 }
610 cd->strm_stat = XPRT_DIED;
611 return (FALSE);
612 }
613
614 static bool_t
svc_vc_getargs(xprt,xdr_args,args_ptr)615 svc_vc_getargs(xprt, xdr_args, args_ptr)
616 SVCXPRT *xprt;
617 xdrproc_t xdr_args;
618 void *args_ptr;
619 {
620 struct cf_conn *cd;
621
622 assert(xprt != NULL);
623 cd = (struct cf_conn *)(xprt->xp_p1);
624 return (SVCAUTH_UNWRAP(&SVC_AUTH(xprt),
625 &cd->xdrs, xdr_args, args_ptr));
626 }
627
628 static bool_t
svc_vc_freeargs(xprt,xdr_args,args_ptr)629 svc_vc_freeargs(xprt, xdr_args, args_ptr)
630 SVCXPRT *xprt;
631 xdrproc_t xdr_args;
632 void *args_ptr;
633 {
634 XDR *xdrs;
635
636 assert(xprt != NULL);
637 /* args_ptr may be NULL */
638
639 xdrs = &(((struct cf_conn *)(xprt->xp_p1))->xdrs);
640
641 xdrs->x_op = XDR_FREE;
642 return ((*xdr_args)(xdrs, args_ptr));
643 }
644
645 static bool_t
svc_vc_reply(xprt,msg)646 svc_vc_reply(xprt, msg)
647 SVCXPRT *xprt;
648 struct rpc_msg *msg;
649 {
650 struct cf_conn *cd;
651 XDR *xdrs;
652 bool_t rstat;
653 xdrproc_t xdr_proc;
654 caddr_t xdr_where;
655 u_int pos;
656
657 assert(xprt != NULL);
658 assert(msg != NULL);
659
660 cd = (struct cf_conn *)(xprt->xp_p1);
661 xdrs = &(cd->xdrs);
662
663 xdrs->x_op = XDR_ENCODE;
664 msg->rm_xid = cd->x_id;
665 rstat = TRUE;
666 if (msg->rm_reply.rp_stat == MSG_ACCEPTED &&
667 msg->rm_reply.rp_acpt.ar_stat == SUCCESS) {
668 xdr_proc = msg->acpted_rply.ar_results.proc;
669 xdr_where = msg->acpted_rply.ar_results.where;
670 msg->acpted_rply.ar_results.proc = (xdrproc_t) xdr_void;
671 msg->acpted_rply.ar_results.where = NULL;
672
673 pos = XDR_GETPOS(xdrs);
674 if (!xdr_replymsg(xdrs, msg) ||
675 !SVCAUTH_WRAP(&SVC_AUTH(xprt), xdrs, xdr_proc, xdr_where)) {
676 XDR_SETPOS(xdrs, pos);
677 rstat = FALSE;
678 }
679 } else {
680 rstat = xdr_replymsg(xdrs, msg);
681 }
682
683 if (rstat)
684 (void)xdrrec_endofrecord(xdrs, TRUE);
685
686 return (rstat);
687 }
688
689 static void
svc_vc_ops(xprt)690 svc_vc_ops(xprt)
691 SVCXPRT *xprt;
692 {
693 static struct xp_ops ops;
694 static struct xp_ops2 ops2;
695
696 /* VARIABLES PROTECTED BY ops_lock: ops, ops2 */
697
698 mutex_lock(&ops_lock);
699 if (ops.xp_recv == NULL) {
700 ops.xp_recv = svc_vc_recv;
701 ops.xp_stat = svc_vc_stat;
702 ops.xp_getargs = svc_vc_getargs;
703 ops.xp_reply = svc_vc_reply;
704 ops.xp_freeargs = svc_vc_freeargs;
705 ops.xp_destroy = svc_vc_destroy;
706 ops2.xp_control = svc_vc_control;
707 }
708 xprt->xp_ops = &ops;
709 xprt->xp_ops2 = &ops2;
710 mutex_unlock(&ops_lock);
711 }
712
713 static void
svc_vc_rendezvous_ops(xprt)714 svc_vc_rendezvous_ops(xprt)
715 SVCXPRT *xprt;
716 {
717 static struct xp_ops ops;
718 static struct xp_ops2 ops2;
719
720 mutex_lock(&ops_lock);
721 if (ops.xp_recv == NULL) {
722 ops.xp_recv = rendezvous_request;
723 ops.xp_stat = rendezvous_stat;
724 ops.xp_getargs =
725 (bool_t (*)(SVCXPRT *, xdrproc_t, void *))abort;
726 ops.xp_reply =
727 (bool_t (*)(SVCXPRT *, struct rpc_msg *))abort;
728 ops.xp_freeargs =
729 (bool_t (*)(SVCXPRT *, xdrproc_t, void *))abort,
730 ops.xp_destroy = svc_vc_destroy;
731 ops2.xp_control = svc_vc_rendezvous_control;
732 }
733 xprt->xp_ops = &ops;
734 xprt->xp_ops2 = &ops2;
735 mutex_unlock(&ops_lock);
736 }
737
738 /*
739 * Get the effective UID of the sending process. Used by rpcbind, keyserv
740 * and rpc.yppasswdd on AF_LOCAL.
741 */
742 int
__rpc_get_local_uid(SVCXPRT * transp,uid_t * uid)743 __rpc_get_local_uid(SVCXPRT *transp, uid_t *uid) {
744 int sock, ret;
745 gid_t egid;
746 uid_t euid;
747 struct sockaddr *sa;
748
749 sock = transp->xp_fd;
750 sa = (struct sockaddr *)transp->xp_rtaddr.buf;
751 if (sa->sa_family == AF_LOCAL) {
752 ret = getpeereid(sock, &euid, &egid);
753 if (ret == 0)
754 *uid = euid;
755 return (ret);
756 } else
757 return (-1);
758 }
759
760 /*
761 * Destroy xprts that have not have had any activity in 'timeout' seconds.
762 * If 'cleanblock' is true, blocking connections (the default) are also
763 * cleaned. If timeout is 0, the least active connection is picked.
764 */
765 bool_t
__svc_clean_idle(fd_set * fds,int timeout,bool_t cleanblock)766 __svc_clean_idle(fd_set *fds, int timeout, bool_t cleanblock)
767 {
768 int i, ncleaned;
769 SVCXPRT *xprt, *least_active;
770 struct timeval tv, tdiff, tmax;
771 struct cf_conn *cd;
772
773 gettimeofday(&tv, NULL);
774 tmax.tv_sec = tmax.tv_usec = 0;
775 least_active = NULL;
776 rwlock_wrlock(&svc_fd_lock);
777 for (i = ncleaned = 0; i <= svc_maxfd; i++) {
778 if (FD_ISSET(i, fds)) {
779 xprt = __svc_xports[i];
780 if (xprt == NULL || xprt->xp_ops == NULL ||
781 xprt->xp_ops->xp_recv != svc_vc_recv)
782 continue;
783 cd = (struct cf_conn *)xprt->xp_p1;
784 if (!cleanblock && !cd->nonblock)
785 continue;
786 if (timeout == 0) {
787 timersub(&tv, &cd->last_recv_time, &tdiff);
788 if (timercmp(&tdiff, &tmax, >)) {
789 tmax = tdiff;
790 least_active = xprt;
791 }
792 continue;
793 }
794 if (tv.tv_sec - cd->last_recv_time.tv_sec > timeout) {
795 __xprt_unregister_unlocked(xprt);
796 __svc_vc_dodestroy(xprt);
797 ncleaned++;
798 }
799 }
800 }
801 if (timeout == 0 && least_active != NULL) {
802 __xprt_unregister_unlocked(least_active);
803 __svc_vc_dodestroy(least_active);
804 ncleaned++;
805 }
806 rwlock_unlock(&svc_fd_lock);
807 return ncleaned > 0 ? TRUE : FALSE;
808 }
809