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