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("$FreeBSD$");
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(int fd,u_int sendsize,u_int recvsize)126 svc_vc_create(int fd, u_int sendsize, u_int recvsize)
127 {
128 SVCXPRT *xprt = NULL;
129 struct cf_rendezvous *r = NULL;
130 struct __rpc_sockinfo si;
131 struct sockaddr_storage sslocal;
132 socklen_t slen;
133
134 if (!__rpc_fd2sockinfo(fd, &si))
135 return NULL;
136
137 r = mem_alloc(sizeof(*r));
138 if (r == NULL) {
139 warnx("svc_vc_create: out of memory");
140 goto cleanup_svc_vc_create;
141 }
142 r->sendsize = __rpc_get_t_size(si.si_af, si.si_proto, (int)sendsize);
143 r->recvsize = __rpc_get_t_size(si.si_af, si.si_proto, (int)recvsize);
144 r->maxrec = __svc_maxrec;
145 xprt = svc_xprt_alloc();
146 if (xprt == NULL) {
147 warnx("svc_vc_create: out of memory");
148 goto cleanup_svc_vc_create;
149 }
150 xprt->xp_p1 = r;
151 xprt->xp_verf = _null_auth;
152 svc_vc_rendezvous_ops(xprt);
153 xprt->xp_port = (u_short)-1; /* It is the rendezvouser */
154 xprt->xp_fd = fd;
155
156 slen = sizeof (struct sockaddr_storage);
157 if (_getsockname(fd, (struct sockaddr *)(void *)&sslocal, &slen) < 0) {
158 warnx("svc_vc_create: could not retrieve local addr");
159 goto cleanup_svc_vc_create;
160 }
161
162 xprt->xp_ltaddr.maxlen = xprt->xp_ltaddr.len = sslocal.ss_len;
163 xprt->xp_ltaddr.buf = mem_alloc((size_t)sslocal.ss_len);
164 if (xprt->xp_ltaddr.buf == NULL) {
165 warnx("svc_vc_create: no mem for local addr");
166 goto cleanup_svc_vc_create;
167 }
168 memcpy(xprt->xp_ltaddr.buf, &sslocal, (size_t)sslocal.ss_len);
169
170 xprt->xp_rtaddr.maxlen = sizeof (struct sockaddr_storage);
171 xprt_register(xprt);
172 return (xprt);
173 cleanup_svc_vc_create:
174 if (xprt)
175 mem_free(xprt, sizeof(*xprt));
176 if (r != NULL)
177 mem_free(r, sizeof(*r));
178 return (NULL);
179 }
180
181 /*
182 * Like svtcp_create(), except the routine takes any *open* UNIX file
183 * descriptor as its first input.
184 */
185 SVCXPRT *
svc_fd_create(int fd,u_int sendsize,u_int recvsize)186 svc_fd_create(int fd, u_int sendsize, u_int recvsize)
187 {
188 struct sockaddr_storage ss;
189 socklen_t slen;
190 SVCXPRT *ret;
191
192 assert(fd != -1);
193
194 ret = makefd_xprt(fd, sendsize, recvsize);
195 if (ret == NULL)
196 return NULL;
197
198 slen = sizeof (struct sockaddr_storage);
199 if (_getsockname(fd, (struct sockaddr *)(void *)&ss, &slen) < 0) {
200 warnx("svc_fd_create: could not retrieve local addr");
201 goto freedata;
202 }
203 ret->xp_ltaddr.maxlen = ret->xp_ltaddr.len = ss.ss_len;
204 ret->xp_ltaddr.buf = mem_alloc((size_t)ss.ss_len);
205 if (ret->xp_ltaddr.buf == NULL) {
206 warnx("svc_fd_create: no mem for local addr");
207 goto freedata;
208 }
209 memcpy(ret->xp_ltaddr.buf, &ss, (size_t)ss.ss_len);
210
211 slen = sizeof (struct sockaddr_storage);
212 if (_getpeername(fd, (struct sockaddr *)(void *)&ss, &slen) < 0) {
213 warnx("svc_fd_create: could not retrieve remote addr");
214 goto freedata;
215 }
216 ret->xp_rtaddr.maxlen = ret->xp_rtaddr.len = ss.ss_len;
217 ret->xp_rtaddr.buf = mem_alloc((size_t)ss.ss_len);
218 if (ret->xp_rtaddr.buf == NULL) {
219 warnx("svc_fd_create: no mem for local addr");
220 goto freedata;
221 }
222 memcpy(ret->xp_rtaddr.buf, &ss, (size_t)ss.ss_len);
223 #ifdef PORTMAP
224 if (ss.ss_family == AF_INET || ss.ss_family == AF_LOCAL) {
225 ret->xp_raddr = *(struct sockaddr_in *)ret->xp_rtaddr.buf;
226 ret->xp_addrlen = sizeof (struct sockaddr_in);
227 }
228 #endif /* PORTMAP */
229
230 return ret;
231
232 freedata:
233 if (ret->xp_ltaddr.buf != NULL)
234 mem_free(ret->xp_ltaddr.buf, rep->xp_ltaddr.maxlen);
235
236 return NULL;
237 }
238
239 static SVCXPRT *
makefd_xprt(int fd,u_int sendsize,u_int recvsize)240 makefd_xprt(int fd, u_int sendsize, u_int recvsize)
241 {
242 SVCXPRT *xprt;
243 struct cf_conn *cd;
244 const char *netid;
245 struct __rpc_sockinfo si;
246
247 assert(fd != -1);
248
249 xprt = svc_xprt_alloc();
250 if (xprt == NULL) {
251 warnx("svc_vc: makefd_xprt: out of memory");
252 goto done;
253 }
254 cd = mem_alloc(sizeof(struct cf_conn));
255 if (cd == NULL) {
256 warnx("svc_tcp: makefd_xprt: out of memory");
257 svc_xprt_free(xprt);
258 xprt = NULL;
259 goto done;
260 }
261 cd->strm_stat = XPRT_IDLE;
262 xdrrec_create(&(cd->xdrs), sendsize, recvsize,
263 xprt, read_vc, write_vc);
264 xprt->xp_p1 = cd;
265 xprt->xp_verf.oa_base = cd->verf_body;
266 svc_vc_ops(xprt); /* truely deals with calls */
267 xprt->xp_port = 0; /* this is a connection, not a rendezvouser */
268 xprt->xp_fd = fd;
269 if (__rpc_fd2sockinfo(fd, &si) && __rpc_sockinfo2netid(&si, &netid))
270 xprt->xp_netid = strdup(netid);
271
272 xprt_register(xprt);
273 done:
274 return (xprt);
275 }
276
277 /*ARGSUSED*/
278 static bool_t
rendezvous_request(SVCXPRT * xprt,struct rpc_msg * msg)279 rendezvous_request(SVCXPRT *xprt, struct rpc_msg *msg)
280 {
281 int sock, flags;
282 struct cf_rendezvous *r;
283 struct cf_conn *cd;
284 struct sockaddr_storage addr, sslocal;
285 socklen_t len, slen;
286 struct __rpc_sockinfo si;
287 SVCXPRT *newxprt;
288 fd_set cleanfds;
289
290 assert(xprt != NULL);
291 assert(msg != NULL);
292
293 r = (struct cf_rendezvous *)xprt->xp_p1;
294 again:
295 len = sizeof addr;
296 if ((sock = _accept(xprt->xp_fd, (struct sockaddr *)(void *)&addr,
297 &len)) < 0) {
298 if (errno == EINTR)
299 goto again;
300 /*
301 * Clean out the most idle file descriptor when we're
302 * running out.
303 */
304 if (errno == EMFILE || errno == ENFILE) {
305 cleanfds = svc_fdset;
306 __svc_clean_idle(&cleanfds, 0, FALSE);
307 goto again;
308 }
309 return (FALSE);
310 }
311 /*
312 * make a new transporter (re-uses xprt)
313 */
314 newxprt = makefd_xprt(sock, r->sendsize, r->recvsize);
315 newxprt->xp_rtaddr.buf = mem_alloc(len);
316 if (newxprt->xp_rtaddr.buf == NULL)
317 return (FALSE);
318 memcpy(newxprt->xp_rtaddr.buf, &addr, len);
319 newxprt->xp_rtaddr.len = len;
320 #ifdef PORTMAP
321 if (addr.ss_family == AF_INET || addr.ss_family == AF_LOCAL) {
322 newxprt->xp_raddr = *(struct sockaddr_in *)newxprt->xp_rtaddr.buf;
323 newxprt->xp_addrlen = sizeof (struct sockaddr_in);
324 }
325 #endif /* PORTMAP */
326 if (__rpc_fd2sockinfo(sock, &si) && si.si_proto == IPPROTO_TCP) {
327 len = 1;
328 /* XXX fvdl - is this useful? */
329 _setsockopt(sock, IPPROTO_TCP, TCP_NODELAY, &len, sizeof (len));
330 }
331
332 cd = (struct cf_conn *)newxprt->xp_p1;
333
334 cd->recvsize = r->recvsize;
335 cd->sendsize = r->sendsize;
336 cd->maxrec = r->maxrec;
337
338 if (cd->maxrec != 0) {
339 flags = _fcntl(sock, F_GETFL, 0);
340 if (flags == -1)
341 return (FALSE);
342 if (_fcntl(sock, F_SETFL, flags | O_NONBLOCK) == -1)
343 return (FALSE);
344 if (cd->recvsize > cd->maxrec)
345 cd->recvsize = cd->maxrec;
346 cd->nonblock = TRUE;
347 __xdrrec_setnonblock(&cd->xdrs, cd->maxrec);
348 } else
349 cd->nonblock = FALSE;
350 slen = sizeof(struct sockaddr_storage);
351 if(_getsockname(sock, (struct sockaddr *)(void *)&sslocal, &slen) < 0) {
352 warnx("svc_vc_create: could not retrieve local addr");
353 newxprt->xp_ltaddr.maxlen = newxprt->xp_ltaddr.len = 0;
354 } else {
355 newxprt->xp_ltaddr.maxlen = newxprt->xp_ltaddr.len = sslocal.ss_len;
356 newxprt->xp_ltaddr.buf = mem_alloc((size_t)sslocal.ss_len);
357 if (newxprt->xp_ltaddr.buf == NULL) {
358 warnx("svc_vc_create: no mem for local addr");
359 newxprt->xp_ltaddr.maxlen = newxprt->xp_ltaddr.len = 0;
360 } else {
361 memcpy(newxprt->xp_ltaddr.buf, &sslocal, (size_t)sslocal.ss_len);
362 }
363 }
364
365 gettimeofday(&cd->last_recv_time, NULL);
366
367 return (FALSE); /* there is never an rpc msg to be processed */
368 }
369
370 /*ARGSUSED*/
371 static enum xprt_stat
rendezvous_stat(SVCXPRT * xprt)372 rendezvous_stat(SVCXPRT *xprt)
373 {
374
375 return (XPRT_IDLE);
376 }
377
378 static void
svc_vc_destroy(SVCXPRT * xprt)379 svc_vc_destroy(SVCXPRT *xprt)
380 {
381 assert(xprt != NULL);
382
383 xprt_unregister(xprt);
384 __svc_vc_dodestroy(xprt);
385 }
386
387 static void
__svc_vc_dodestroy(SVCXPRT * xprt)388 __svc_vc_dodestroy(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(SVCXPRT * xprt,const u_int rq,void * in)418 svc_vc_control(SVCXPRT *xprt, const u_int rq, void *in)
419 {
420 return (FALSE);
421 }
422
423 static bool_t
svc_vc_rendezvous_control(SVCXPRT * xprt,const u_int rq,void * in)424 svc_vc_rendezvous_control(SVCXPRT *xprt, const u_int rq, void *in)
425 {
426 struct cf_rendezvous *cfp;
427
428 cfp = (struct cf_rendezvous *)xprt->xp_p1;
429 if (cfp == NULL)
430 return (FALSE);
431 switch (rq) {
432 case SVCGET_CONNMAXREC:
433 *(int *)in = cfp->maxrec;
434 break;
435 case SVCSET_CONNMAXREC:
436 cfp->maxrec = *(int *)in;
437 break;
438 default:
439 return (FALSE);
440 }
441 return (TRUE);
442 }
443
444 /*
445 * reads data from the tcp or uip connection.
446 * any error is fatal and the connection is closed.
447 * (And a read of zero bytes is a half closed stream => error.)
448 * All read operations timeout after 35 seconds. A timeout is
449 * fatal for the connection.
450 */
451 static int
read_vc(void * xprtp,void * buf,int len)452 read_vc(void *xprtp, void *buf, int len)
453 {
454 SVCXPRT *xprt;
455 int sock;
456 int milliseconds = 35 * 1000;
457 struct pollfd pollfd;
458 struct cf_conn *cfp;
459
460 xprt = (SVCXPRT *)xprtp;
461 assert(xprt != NULL);
462
463 sock = xprt->xp_fd;
464
465 cfp = (struct cf_conn *)xprt->xp_p1;
466
467 if (cfp->nonblock) {
468 len = _read(sock, buf, (size_t)len);
469 if (len < 0) {
470 if (errno == EAGAIN)
471 len = 0;
472 else
473 goto fatal_err;
474 }
475 if (len != 0)
476 gettimeofday(&cfp->last_recv_time, NULL);
477 return len;
478 }
479
480 do {
481 pollfd.fd = sock;
482 pollfd.events = POLLIN;
483 pollfd.revents = 0;
484 switch (_poll(&pollfd, 1, milliseconds)) {
485 case -1:
486 if (errno == EINTR)
487 continue;
488 /*FALLTHROUGH*/
489 case 0:
490 goto fatal_err;
491
492 default:
493 break;
494 }
495 } while ((pollfd.revents & POLLIN) == 0);
496
497 if ((len = _read(sock, buf, (size_t)len)) > 0) {
498 gettimeofday(&cfp->last_recv_time, NULL);
499 return (len);
500 }
501
502 fatal_err:
503 ((struct cf_conn *)(xprt->xp_p1))->strm_stat = XPRT_DIED;
504 return (-1);
505 }
506
507 /*
508 * writes data to the tcp connection.
509 * Any error is fatal and the connection is closed.
510 */
511 static int
write_vc(void * xprtp,void * buf,int len)512 write_vc(void *xprtp, void *buf, int len)
513 {
514 SVCXPRT *xprt;
515 int i, cnt;
516 struct cf_conn *cd;
517 struct timeval tv0, tv1;
518
519 xprt = (SVCXPRT *)xprtp;
520 assert(xprt != NULL);
521
522 cd = (struct cf_conn *)xprt->xp_p1;
523
524 if (cd->nonblock)
525 gettimeofday(&tv0, NULL);
526
527 for (cnt = len; cnt > 0; cnt -= i, buf = (char *)buf + i) {
528 i = _write(xprt->xp_fd, buf, (size_t)cnt);
529 if (i < 0) {
530 if (errno != EAGAIN || !cd->nonblock) {
531 cd->strm_stat = XPRT_DIED;
532 return (-1);
533 }
534 if (cd->nonblock) {
535 /*
536 * For non-blocking connections, do not
537 * take more than 2 seconds writing the
538 * data out.
539 *
540 * XXX 2 is an arbitrary amount.
541 */
542 gettimeofday(&tv1, NULL);
543 if (tv1.tv_sec - tv0.tv_sec >= 2) {
544 cd->strm_stat = XPRT_DIED;
545 return (-1);
546 }
547 }
548 i = 0;
549 }
550 }
551
552 return (len);
553 }
554
555 static enum xprt_stat
svc_vc_stat(SVCXPRT * xprt)556 svc_vc_stat(SVCXPRT *xprt)
557 {
558 struct cf_conn *cd;
559
560 assert(xprt != NULL);
561
562 cd = (struct cf_conn *)(xprt->xp_p1);
563
564 if (cd->strm_stat == XPRT_DIED)
565 return (XPRT_DIED);
566 if (! xdrrec_eof(&(cd->xdrs)))
567 return (XPRT_MOREREQS);
568 return (XPRT_IDLE);
569 }
570
571 static bool_t
svc_vc_recv(SVCXPRT * xprt,struct rpc_msg * msg)572 svc_vc_recv(SVCXPRT *xprt, struct rpc_msg *msg)
573 {
574 struct cf_conn *cd;
575 XDR *xdrs;
576
577 assert(xprt != NULL);
578 assert(msg != NULL);
579
580 cd = (struct cf_conn *)(xprt->xp_p1);
581 xdrs = &(cd->xdrs);
582
583 if (cd->nonblock) {
584 if (!__xdrrec_getrec(xdrs, &cd->strm_stat, TRUE))
585 return FALSE;
586 } else {
587 (void)xdrrec_skiprecord(xdrs);
588 }
589
590 xdrs->x_op = XDR_DECODE;
591 if (xdr_callmsg(xdrs, msg)) {
592 cd->x_id = msg->rm_xid;
593 return (TRUE);
594 }
595 cd->strm_stat = XPRT_DIED;
596 return (FALSE);
597 }
598
599 static bool_t
svc_vc_getargs(SVCXPRT * xprt,xdrproc_t xdr_args,void * args_ptr)600 svc_vc_getargs(SVCXPRT *xprt, xdrproc_t xdr_args, void *args_ptr)
601 {
602 struct cf_conn *cd;
603
604 assert(xprt != NULL);
605 cd = (struct cf_conn *)(xprt->xp_p1);
606 return (SVCAUTH_UNWRAP(&SVC_AUTH(xprt),
607 &cd->xdrs, xdr_args, args_ptr));
608 }
609
610 static bool_t
svc_vc_freeargs(SVCXPRT * xprt,xdrproc_t xdr_args,void * args_ptr)611 svc_vc_freeargs(SVCXPRT *xprt, xdrproc_t xdr_args, void *args_ptr)
612 {
613 XDR *xdrs;
614
615 assert(xprt != NULL);
616 /* args_ptr may be NULL */
617
618 xdrs = &(((struct cf_conn *)(xprt->xp_p1))->xdrs);
619
620 xdrs->x_op = XDR_FREE;
621 return ((*xdr_args)(xdrs, args_ptr));
622 }
623
624 static bool_t
svc_vc_reply(SVCXPRT * xprt,struct rpc_msg * msg)625 svc_vc_reply(SVCXPRT *xprt, struct rpc_msg *msg)
626 {
627 struct cf_conn *cd;
628 XDR *xdrs;
629 bool_t rstat;
630 xdrproc_t xdr_proc;
631 caddr_t xdr_where;
632 u_int pos;
633
634 assert(xprt != NULL);
635 assert(msg != NULL);
636
637 cd = (struct cf_conn *)(xprt->xp_p1);
638 xdrs = &(cd->xdrs);
639
640 xdrs->x_op = XDR_ENCODE;
641 msg->rm_xid = cd->x_id;
642 rstat = TRUE;
643 if (msg->rm_reply.rp_stat == MSG_ACCEPTED &&
644 msg->rm_reply.rp_acpt.ar_stat == SUCCESS) {
645 xdr_proc = msg->acpted_rply.ar_results.proc;
646 xdr_where = msg->acpted_rply.ar_results.where;
647 msg->acpted_rply.ar_results.proc = (xdrproc_t) xdr_void;
648 msg->acpted_rply.ar_results.where = NULL;
649
650 pos = XDR_GETPOS(xdrs);
651 if (!xdr_replymsg(xdrs, msg) ||
652 !SVCAUTH_WRAP(&SVC_AUTH(xprt), xdrs, xdr_proc, xdr_where)) {
653 XDR_SETPOS(xdrs, pos);
654 rstat = FALSE;
655 }
656 } else {
657 rstat = xdr_replymsg(xdrs, msg);
658 }
659
660 if (rstat)
661 (void)xdrrec_endofrecord(xdrs, TRUE);
662
663 return (rstat);
664 }
665
666 static void
svc_vc_ops(SVCXPRT * xprt)667 svc_vc_ops(SVCXPRT *xprt)
668 {
669 static struct xp_ops ops;
670 static struct xp_ops2 ops2;
671
672 /* VARIABLES PROTECTED BY ops_lock: ops, ops2 */
673
674 mutex_lock(&ops_lock);
675 if (ops.xp_recv == NULL) {
676 ops.xp_recv = svc_vc_recv;
677 ops.xp_stat = svc_vc_stat;
678 ops.xp_getargs = svc_vc_getargs;
679 ops.xp_reply = svc_vc_reply;
680 ops.xp_freeargs = svc_vc_freeargs;
681 ops.xp_destroy = svc_vc_destroy;
682 ops2.xp_control = svc_vc_control;
683 }
684 xprt->xp_ops = &ops;
685 xprt->xp_ops2 = &ops2;
686 mutex_unlock(&ops_lock);
687 }
688
689 static void
svc_vc_rendezvous_ops(SVCXPRT * xprt)690 svc_vc_rendezvous_ops(SVCXPRT *xprt)
691 {
692 static struct xp_ops ops;
693 static struct xp_ops2 ops2;
694
695 mutex_lock(&ops_lock);
696 if (ops.xp_recv == NULL) {
697 ops.xp_recv = rendezvous_request;
698 ops.xp_stat = rendezvous_stat;
699 ops.xp_getargs =
700 (bool_t (*)(SVCXPRT *, xdrproc_t, void *))abort;
701 ops.xp_reply =
702 (bool_t (*)(SVCXPRT *, struct rpc_msg *))abort;
703 ops.xp_freeargs =
704 (bool_t (*)(SVCXPRT *, xdrproc_t, void *))abort,
705 ops.xp_destroy = svc_vc_destroy;
706 ops2.xp_control = svc_vc_rendezvous_control;
707 }
708 xprt->xp_ops = &ops;
709 xprt->xp_ops2 = &ops2;
710 mutex_unlock(&ops_lock);
711 }
712
713 /*
714 * Get the effective UID of the sending process. Used by rpcbind, keyserv
715 * and rpc.yppasswdd on AF_LOCAL.
716 */
717 int
__rpc_get_local_uid(SVCXPRT * transp,uid_t * uid)718 __rpc_get_local_uid(SVCXPRT *transp, uid_t *uid) {
719 int sock, ret;
720 gid_t egid;
721 uid_t euid;
722 struct sockaddr *sa;
723
724 sock = transp->xp_fd;
725 sa = (struct sockaddr *)transp->xp_rtaddr.buf;
726 if (sa->sa_family == AF_LOCAL) {
727 ret = getpeereid(sock, &euid, &egid);
728 if (ret == 0)
729 *uid = euid;
730 return (ret);
731 } else
732 return (-1);
733 }
734
735 /*
736 * Destroy xprts that have not have had any activity in 'timeout' seconds.
737 * If 'cleanblock' is true, blocking connections (the default) are also
738 * cleaned. If timeout is 0, the least active connection is picked.
739 */
740 bool_t
__svc_clean_idle(fd_set * fds,int timeout,bool_t cleanblock)741 __svc_clean_idle(fd_set *fds, int timeout, bool_t cleanblock)
742 {
743 int i, ncleaned;
744 SVCXPRT *xprt, *least_active;
745 struct timeval tv, tdiff, tmax;
746 struct cf_conn *cd;
747
748 gettimeofday(&tv, NULL);
749 tmax.tv_sec = tmax.tv_usec = 0;
750 least_active = NULL;
751 rwlock_wrlock(&svc_fd_lock);
752 for (i = ncleaned = 0; i <= svc_maxfd; i++) {
753 if (FD_ISSET(i, fds)) {
754 xprt = __svc_xports[i];
755 if (xprt == NULL || xprt->xp_ops == NULL ||
756 xprt->xp_ops->xp_recv != svc_vc_recv)
757 continue;
758 cd = (struct cf_conn *)xprt->xp_p1;
759 if (!cleanblock && !cd->nonblock)
760 continue;
761 if (timeout == 0) {
762 timersub(&tv, &cd->last_recv_time, &tdiff);
763 if (timercmp(&tdiff, &tmax, >)) {
764 tmax = tdiff;
765 least_active = xprt;
766 }
767 continue;
768 }
769 if (tv.tv_sec - cd->last_recv_time.tv_sec > timeout) {
770 __xprt_unregister_unlocked(xprt);
771 __svc_vc_dodestroy(xprt);
772 ncleaned++;
773 }
774 }
775 }
776 if (timeout == 0 && least_active != NULL) {
777 __xprt_unregister_unlocked(least_active);
778 __svc_vc_dodestroy(least_active);
779 ncleaned++;
780 }
781 rwlock_unlock(&svc_fd_lock);
782 return ncleaned > 0 ? TRUE : FALSE;
783 }
784