1/* $NetBSD: svc_vc.c,v 1.7 2000/08/03 00:01:53 fvdl Exp $ */
2
3/*
4 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
5 * unrestricted use provided that this legend is included on all tape
6 * media and as a part of the software program in whole or part. Users
7 * may copy or modify Sun RPC without charge, but are not authorized
8 * to license or distribute it to anyone else except as part of a product or
9 * program developed by the user.
10 *
11 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
12 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
13 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
14 *
15 * Sun RPC is provided with no support and without any obligation on the
16 * part of Sun Microsystems, Inc. to assist in its use, correction,
17 * modification or enhancement.
18 *
19 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
20 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
21 * OR ANY PART THEREOF.
22 *
23 * In no event will Sun Microsystems, Inc. be liable for any lost revenue
24 * or profits or other special, indirect and consequential damages, even if
25 * Sun has been advised of the possibility of such damages.
26 *
27 * Sun Microsystems, Inc.
28 * 2550 Garcia Avenue
29 * Mountain View, California 94043
30 */
31
32#if defined(LIBC_SCCS) && !defined(lint)
33static char *sccsid2 = "@(#)svc_tcp.c 1.21 87/08/11 Copyr 1984 Sun Micro";
34static char *sccsid = "@(#)svc_tcp.c 2.2 88/08/01 4.0 RPCSRC";
35#endif
36#include <sys/cdefs.h>
37__FBSDID("$FreeBSD: head/lib/libc/rpc/svc_vc.c 162196 2006-09-09 22:33:21Z mbr $");
38
39/*
40 * svc_vc.c, Server side for Connection Oriented based RPC.
41 *
42 * Actually implements two flavors of transporter -
43 * a tcp rendezvouser (a listner and connection establisher)
44 * and a record/tcp stream.
45 */
46
47#include "namespace.h"
48#include "reentrant.h"
49#include <sys/types.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
74static SVCXPRT *makefd_xprt(int, u_int, u_int);
75static bool_t rendezvous_request(SVCXPRT *, struct rpc_msg *);
76static enum xprt_stat rendezvous_stat(SVCXPRT *);
77static void svc_vc_destroy(SVCXPRT *);
78static void __svc_vc_dodestroy (SVCXPRT *);
79static int read_vc(void *, void *, int);
80static int write_vc(void *, void *, int);
81static enum xprt_stat svc_vc_stat(SVCXPRT *);
82static bool_t svc_vc_recv(SVCXPRT *, struct rpc_msg *);
83static bool_t svc_vc_getargs(SVCXPRT *, xdrproc_t, void *);
84static bool_t svc_vc_freeargs(SVCXPRT *, xdrproc_t, void *);
85static bool_t svc_vc_reply(SVCXPRT *, struct rpc_msg *);
86static void svc_vc_rendezvous_ops(SVCXPRT *);
87static void svc_vc_ops(SVCXPRT *);
88static bool_t svc_vc_control(SVCXPRT *xprt, const u_int rq, void *in);
89static bool_t svc_vc_rendezvous_control (SVCXPRT *xprt, const u_int rq,
90 void *in);
91
92struct cf_rendezvous { /* kept in xprt->xp_p1 for rendezvouser */
93 u_int sendsize;
94 u_int recvsize;
95 int maxrec;
96};
97
98struct 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 */
126SVCXPRT *
127svc_vc_create(fd, sendsize, recvsize)
128 int fd;
129 u_int sendsize;
130 u_int recvsize;
131{
132 SVCXPRT *xprt;
133 struct cf_rendezvous *r = NULL;
134 struct __rpc_sockinfo si;
135 struct sockaddr_storage sslocal;
136 socklen_t slen;
137
138 if (!__rpc_fd2sockinfo(fd, &si))
139 return NULL;
140
141 r = mem_alloc(sizeof(*r));
142 if (r == NULL) {
143 warnx("svc_vc_create: out of memory");
144 goto cleanup_svc_vc_create;
145 }
146 r->sendsize = __rpc_get_t_size(si.si_af, si.si_proto, (int)sendsize);
147 r->recvsize = __rpc_get_t_size(si.si_af, si.si_proto, (int)recvsize);
148 r->maxrec = __svc_maxrec;
149 xprt = mem_alloc(sizeof(SVCXPRT));
150 if (xprt == NULL) {
151 warnx("svc_vc_create: out of memory");
152 goto cleanup_svc_vc_create;
153 }
154 xprt->xp_tp = NULL;
155 xprt->xp_p1 = r;
156 xprt->xp_p2 = NULL;
157 xprt->xp_p3 = NULL;
158 xprt->xp_verf = _null_auth;
159 svc_vc_rendezvous_ops(xprt);
160 xprt->xp_port = (u_short)-1; /* It is the rendezvouser */
161 xprt->xp_fd = fd;
162
163 slen = sizeof (struct sockaddr_storage);
164 if (_getsockname(fd, (struct sockaddr *)(void *)&sslocal, &slen) < 0) {
165 warnx("svc_vc_create: could not retrieve local addr");
166 goto cleanup_svc_vc_create;
167 }
168
169 xprt->xp_ltaddr.maxlen = xprt->xp_ltaddr.len = sslocal.ss_len;
170 xprt->xp_ltaddr.buf = mem_alloc((size_t)sslocal.ss_len);
171 if (xprt->xp_ltaddr.buf == NULL) {
172 warnx("svc_vc_create: no mem for local addr");
173 goto cleanup_svc_vc_create;
174 }
175 memcpy(xprt->xp_ltaddr.buf, &sslocal, (size_t)sslocal.ss_len);
176
177 xprt->xp_rtaddr.maxlen = sizeof (struct sockaddr_storage);
178 xprt_register(xprt);
179 return (xprt);
180cleanup_svc_vc_create:
181 if (xprt)
182 mem_free(xprt, sizeof(*xprt));
183 if (r != NULL)
184 mem_free(r, sizeof(*r));
185 return (NULL);
186}
187
188/*
189 * Like svtcp_create(), except the routine takes any *open* UNIX file
190 * descriptor as its first input.
191 */
192SVCXPRT *
193svc_fd_create(fd, sendsize, recvsize)
194 int fd;
195 u_int sendsize;
196 u_int recvsize;
197{
198 struct sockaddr_storage ss;
199 socklen_t slen;
200 SVCXPRT *ret;
201
202 assert(fd != -1);
203
204 ret = makefd_xprt(fd, sendsize, recvsize);
205 if (ret == NULL)
206 return NULL;
207
208 slen = sizeof (struct sockaddr_storage);
209 if (_getsockname(fd, (struct sockaddr *)(void *)&ss, &slen) < 0) {
210 warnx("svc_fd_create: could not retrieve local addr");
211 goto freedata;
212 }
213 ret->xp_ltaddr.maxlen = ret->xp_ltaddr.len = ss.ss_len;
214 ret->xp_ltaddr.buf = mem_alloc((size_t)ss.ss_len);
215 if (ret->xp_ltaddr.buf == NULL) {
216 warnx("svc_fd_create: no mem for local addr");
217 goto freedata;
218 }
219 memcpy(ret->xp_ltaddr.buf, &ss, (size_t)ss.ss_len);
220
221 slen = sizeof (struct sockaddr_storage);
222 if (_getpeername(fd, (struct sockaddr *)(void *)&ss, &slen) < 0) {
223 warnx("svc_fd_create: could not retrieve remote addr");
224 goto freedata;
225 }
226 ret->xp_rtaddr.maxlen = ret->xp_rtaddr.len = ss.ss_len;
227 ret->xp_rtaddr.buf = mem_alloc((size_t)ss.ss_len);
228 if (ret->xp_rtaddr.buf == NULL) {
229 warnx("svc_fd_create: no mem for local addr");
230 goto freedata;
231 }
232 memcpy(ret->xp_rtaddr.buf, &ss, (size_t)ss.ss_len);
233#ifdef PORTMAP
234 if (ss.ss_family == AF_INET || ss.ss_family == AF_LOCAL) {
235 ret->xp_raddr = *(struct sockaddr_in *)ret->xp_rtaddr.buf;
236 ret->xp_addrlen = sizeof (struct sockaddr_in);
237 }
238#endif /* PORTMAP */
239
240 return ret;
241
242freedata:
243 if (ret->xp_ltaddr.buf != NULL)
244 mem_free(ret->xp_ltaddr.buf, rep->xp_ltaddr.maxlen);
245
246 return NULL;
247}
248
249static SVCXPRT *
250makefd_xprt(fd, sendsize, recvsize)
251 int fd;
252 u_int sendsize;
253 u_int recvsize;
254{
255 SVCXPRT *xprt;
256 struct cf_conn *cd;
257 const char *netid;
258 struct __rpc_sockinfo si;
259
260 assert(fd != -1);
261
262 xprt = mem_alloc(sizeof(SVCXPRT));
263 if (xprt == NULL) {
264 warnx("svc_vc: makefd_xprt: out of memory");
265 goto done;
266 }
267 memset(xprt, 0, sizeof *xprt);
268 cd = mem_alloc(sizeof(struct cf_conn));
269 if (cd == NULL) {
270 warnx("svc_tcp: makefd_xprt: out of memory");
271 mem_free(xprt, sizeof(SVCXPRT));
272 xprt = NULL;
273 goto done;
274 }
275 cd->strm_stat = XPRT_IDLE;
276 xdrrec_create(&(cd->xdrs), sendsize, recvsize,
277 xprt, read_vc, write_vc);
278 xprt->xp_p1 = cd;
279 xprt->xp_verf.oa_base = cd->verf_body;
280 svc_vc_ops(xprt); /* truely deals with calls */
281 xprt->xp_port = 0; /* this is a connection, not a rendezvouser */
282 xprt->xp_fd = fd;
283 if (__rpc_fd2sockinfo(fd, &si) && __rpc_sockinfo2netid(&si, &netid))
284 xprt->xp_netid = strdup(netid);
285
286 xprt_register(xprt);
287done:
288 return (xprt);
289}
290
291/*ARGSUSED*/
292static bool_t
293rendezvous_request(xprt, msg)
294 SVCXPRT *xprt;
295 struct rpc_msg *msg;
296{
297 int sock, flags;
298 struct cf_rendezvous *r;
299 struct cf_conn *cd;
300 struct sockaddr_storage addr;
301 socklen_t len;
302 struct __rpc_sockinfo si;
303 SVCXPRT *newxprt;
304 fd_set cleanfds;
305
306 assert(xprt != NULL);
307 assert(msg != NULL);
308
309 r = (struct cf_rendezvous *)xprt->xp_p1;
310again:
311 len = sizeof addr;
312 if ((sock = _accept(xprt->xp_fd, (struct sockaddr *)(void *)&addr,
313 &len)) < 0) {
314 if (errno == EINTR)
315 goto again;
316 /*
317 * Clean out the most idle file descriptor when we're
318 * running out.
319 */
320 if (errno == EMFILE || errno == ENFILE) {
321 cleanfds = svc_fdset;
322 __svc_clean_idle(&cleanfds, 0, FALSE);
323 goto again;
324 }
325 return (FALSE);
326 }
327 /*
328 * make a new transporter (re-uses xprt)
329 */
330 newxprt = makefd_xprt(sock, r->sendsize, r->recvsize);
331 newxprt->xp_rtaddr.buf = mem_alloc(len);
332 if (newxprt->xp_rtaddr.buf == NULL)
333 return (FALSE);
334 memcpy(newxprt->xp_rtaddr.buf, &addr, len);
335 newxprt->xp_rtaddr.len = len;
336#ifdef PORTMAP
337 if (addr.ss_family == AF_INET || addr.ss_family == AF_LOCAL) {
338 newxprt->xp_raddr = *(struct sockaddr_in *)newxprt->xp_rtaddr.buf;
339 newxprt->xp_addrlen = sizeof (struct sockaddr_in);
340 }
341#endif /* PORTMAP */
342 if (__rpc_fd2sockinfo(sock, &si) && si.si_proto == IPPROTO_TCP) {
343 len = 1;
344 /* XXX fvdl - is this useful? */
345 _setsockopt(sock, IPPROTO_TCP, TCP_NODELAY, &len, sizeof (len));
346 }
347
348 cd = (struct cf_conn *)newxprt->xp_p1;
349
350 cd->recvsize = r->recvsize;
351 cd->sendsize = r->sendsize;
352 cd->maxrec = r->maxrec;
353
354 if (cd->maxrec != 0) {
355 flags = _fcntl(sock, F_GETFL, 0);
356 if (flags == -1)
357 return (FALSE);
358 if (_fcntl(sock, F_SETFL, flags | O_NONBLOCK) == -1)
359 return (FALSE);
360 if (cd->recvsize > cd->maxrec)
361 cd->recvsize = cd->maxrec;
362 cd->nonblock = TRUE;
363 __xdrrec_setnonblock(&cd->xdrs, cd->maxrec);
364 } else
365 cd->nonblock = FALSE;
366
367 gettimeofday(&cd->last_recv_time, NULL);
368
369 return (FALSE); /* there is never an rpc msg to be processed */
370}
371
372/*ARGSUSED*/
373static enum xprt_stat
374rendezvous_stat(xprt)
375 SVCXPRT *xprt;
376{
377
378 return (XPRT_IDLE);
379}
380
381static void
382svc_vc_destroy(xprt)
383 SVCXPRT *xprt;
384{
385 assert(xprt != NULL);
386
387 xprt_unregister(xprt);
388 __svc_vc_dodestroy(xprt);
389}
390
391static void
392__svc_vc_dodestroy(xprt)
393 SVCXPRT *xprt;
394{
395 struct cf_conn *cd;
396 struct cf_rendezvous *r;
397
398 cd = (struct cf_conn *)xprt->xp_p1;
399
400 if (xprt->xp_fd != RPC_ANYFD)
401 (void)_close(xprt->xp_fd);
402 if (xprt->xp_port != 0) {
403 /* a rendezvouser socket */
404 r = (struct cf_rendezvous *)xprt->xp_p1;
405 mem_free(r, sizeof (struct cf_rendezvous));
406 xprt->xp_port = 0;
407 } else {
408 /* an actual connection socket */
409 XDR_DESTROY(&(cd->xdrs));
410 mem_free(cd, sizeof(struct cf_conn));
411 }
412 if (xprt->xp_rtaddr.buf)
413 mem_free(xprt->xp_rtaddr.buf, xprt->xp_rtaddr.maxlen);
414 if (xprt->xp_ltaddr.buf)
415 mem_free(xprt->xp_ltaddr.buf, xprt->xp_ltaddr.maxlen);
416 if (xprt->xp_tp)
417 free(xprt->xp_tp);
418 if (xprt->xp_netid)
419 free(xprt->xp_netid);
420 mem_free(xprt, sizeof(SVCXPRT));
421}
422
423/*ARGSUSED*/
424static bool_t
425svc_vc_control(xprt, rq, in)
426 SVCXPRT *xprt;
427 const u_int rq;
428 void *in;
429{
430 return (FALSE);
431}
432
433static bool_t
434svc_vc_rendezvous_control(xprt, rq, in)
435 SVCXPRT *xprt;
436 const u_int rq;
437 void *in;
438{
439 struct cf_rendezvous *cfp;
440
441 cfp = (struct cf_rendezvous *)xprt->xp_p1;
442 if (cfp == NULL)
443 return (FALSE);
444 switch (rq) {
445 case SVCGET_CONNMAXREC:
446 *(int *)in = cfp->maxrec;
447 break;
448 case SVCSET_CONNMAXREC:
449 cfp->maxrec = *(int *)in;
450 break;
451 default:
452 return (FALSE);
453 }
454 return (TRUE);
455}
456
457/*
458 * reads data from the tcp or uip connection.
459 * any error is fatal and the connection is closed.
460 * (And a read of zero bytes is a half closed stream => error.)
461 * All read operations timeout after 35 seconds. A timeout is
462 * fatal for the connection.
463 */
464static int
465read_vc(xprtp, buf, len)
466 void *xprtp;
467 void *buf;
468 int len;
469{
470 SVCXPRT *xprt;
471 int sock;
472 int milliseconds = 35 * 1000;
473 struct pollfd pollfd;
474 struct cf_conn *cfp;
475
476 xprt = (SVCXPRT *)xprtp;
477 assert(xprt != NULL);
478
479 sock = xprt->xp_fd;
480
481 cfp = (struct cf_conn *)xprt->xp_p1;
482
483 if (cfp->nonblock) {
484 len = _read(sock, buf, (size_t)len);
485 if (len < 0) {
486 if (errno == EAGAIN)
487 len = 0;
488 else
489 goto fatal_err;
490 }
491 if (len != 0)
492 gettimeofday(&cfp->last_recv_time, NULL);
493 return len;
494 }
495
496 do {
497 pollfd.fd = sock;
498 pollfd.events = POLLIN;
499 pollfd.revents = 0;
500 switch (_poll(&pollfd, 1, milliseconds)) {
501 case -1:
502 if (errno == EINTR)
503 continue;
504 /*FALLTHROUGH*/
505 case 0:
506 goto fatal_err;
507
508 default:
509 break;
510 }
511 } while ((pollfd.revents & POLLIN) == 0);
512
513 if ((len = _read(sock, buf, (size_t)len)) > 0) {
514 gettimeofday(&cfp->last_recv_time, NULL);
515 return (len);
516 }
517
518fatal_err:
519 ((struct cf_conn *)(xprt->xp_p1))->strm_stat = XPRT_DIED;
520 return (-1);
521}
522
523/*
524 * writes data to the tcp connection.
525 * Any error is fatal and the connection is closed.
526 */
527static int
528write_vc(xprtp, buf, len)
529 void *xprtp;
530 void *buf;
531 int len;
532{
533 SVCXPRT *xprt;
534 int i, cnt;
535 struct cf_conn *cd;
536 struct timeval tv0, tv1;
537
538 xprt = (SVCXPRT *)xprtp;
539 assert(xprt != NULL);
540
541 cd = (struct cf_conn *)xprt->xp_p1;
542
543 if (cd->nonblock)
544 gettimeofday(&tv0, NULL);
545
546 for (cnt = len; cnt > 0; cnt -= i, buf = (char *)buf + i) {
547 i = _write(xprt->xp_fd, buf, (size_t)cnt);
548 if (i < 0) {
549 if (errno != EAGAIN || !cd->nonblock) {
550 cd->strm_stat = XPRT_DIED;
551 return (-1);
552 }
553 if (cd->nonblock && i != cnt) {
554 /*
555 * For non-blocking connections, do not
556 * take more than 2 seconds writing the
557 * data out.
558 *
559 * XXX 2 is an arbitrary amount.
560 */
561 gettimeofday(&tv1, NULL);
562 if (tv1.tv_sec - tv0.tv_sec >= 2) {
563 cd->strm_stat = XPRT_DIED;
564 return (-1);
565 }
566 }
567 }
568 }
569
570 return (len);
571}
572
573static enum xprt_stat
574svc_vc_stat(xprt)
575 SVCXPRT *xprt;
576{
577 struct cf_conn *cd;
578
579 assert(xprt != NULL);
580
581 cd = (struct cf_conn *)(xprt->xp_p1);
582
583 if (cd->strm_stat == XPRT_DIED)
584 return (XPRT_DIED);
585 if (! xdrrec_eof(&(cd->xdrs)))
586 return (XPRT_MOREREQS);
587 return (XPRT_IDLE);
588}
589
590static bool_t
591svc_vc_recv(xprt, msg)
592 SVCXPRT *xprt;
593 struct rpc_msg *msg;
594{
595 struct cf_conn *cd;
596 XDR *xdrs;
597
598 assert(xprt != NULL);
599 assert(msg != NULL);
600
601 cd = (struct cf_conn *)(xprt->xp_p1);
602 xdrs = &(cd->xdrs);
603
604 if (cd->nonblock) {
605 if (!__xdrrec_getrec(xdrs, &cd->strm_stat, TRUE))
606 return FALSE;
607 }
608
609 xdrs->x_op = XDR_DECODE;
610 (void)xdrrec_skiprecord(xdrs);
611 if (xdr_callmsg(xdrs, msg)) {
612 cd->x_id = msg->rm_xid;
613 return (TRUE);
614 }
615 cd->strm_stat = XPRT_DIED;
616 return (FALSE);
617}
618
619static bool_t
620svc_vc_getargs(xprt, xdr_args, args_ptr)
621 SVCXPRT *xprt;
622 xdrproc_t xdr_args;
623 void *args_ptr;
624{
625
626 assert(xprt != NULL);
627 /* args_ptr may be NULL */
628 return ((*xdr_args)(&(((struct cf_conn *)(xprt->xp_p1))->xdrs),
629 args_ptr));
630}
631
632static bool_t
633svc_vc_freeargs(xprt, xdr_args, args_ptr)
634 SVCXPRT *xprt;
635 xdrproc_t xdr_args;
636 void *args_ptr;
637{
638 XDR *xdrs;
639
640 assert(xprt != NULL);
641 /* args_ptr may be NULL */
642
643 xdrs = &(((struct cf_conn *)(xprt->xp_p1))->xdrs);
644
645 xdrs->x_op = XDR_FREE;
646 return ((*xdr_args)(xdrs, args_ptr));
647}
648
649static bool_t
650svc_vc_reply(xprt, msg)
651 SVCXPRT *xprt;
652 struct rpc_msg *msg;
653{
654 struct cf_conn *cd;
655 XDR *xdrs;
656 bool_t rstat;
657
658 assert(xprt != NULL);
659 assert(msg != NULL);
660
661 cd = (struct cf_conn *)(xprt->xp_p1);
662 xdrs = &(cd->xdrs);
663
664 xdrs->x_op = XDR_ENCODE;
665 msg->rm_xid = cd->x_id;
666 rstat = xdr_replymsg(xdrs, msg);
667 (void)xdrrec_endofrecord(xdrs, TRUE);
668 return (rstat);
669}
670
671static void
672svc_vc_ops(xprt)
673 SVCXPRT *xprt;
674{
675 static struct xp_ops ops;
676 static struct xp_ops2 ops2;
677
678/* VARIABLES PROTECTED BY ops_lock: ops, ops2 */
679
680 mutex_lock(&ops_lock);
681 if (ops.xp_recv == NULL) {
682 ops.xp_recv = svc_vc_recv;
683 ops.xp_stat = svc_vc_stat;
684 ops.xp_getargs = svc_vc_getargs;
685 ops.xp_reply = svc_vc_reply;
686 ops.xp_freeargs = svc_vc_freeargs;
687 ops.xp_destroy = svc_vc_destroy;
688 ops2.xp_control = svc_vc_control;
689 }
690 xprt->xp_ops = &ops;
691 xprt->xp_ops2 = &ops2;
692 mutex_unlock(&ops_lock);
693}
694
695static void
696svc_vc_rendezvous_ops(xprt)
697 SVCXPRT *xprt;
698{
699 static struct xp_ops ops;
700 static struct xp_ops2 ops2;
701
702 mutex_lock(&ops_lock);
703 if (ops.xp_recv == NULL) {
704 ops.xp_recv = rendezvous_request;
705 ops.xp_stat = rendezvous_stat;
706 ops.xp_getargs =
707 (bool_t (*)(SVCXPRT *, xdrproc_t, void *))abort;
708 ops.xp_reply =
709 (bool_t (*)(SVCXPRT *, struct rpc_msg *))abort;
710 ops.xp_freeargs =
711 (bool_t (*)(SVCXPRT *, xdrproc_t, void *))abort,
712 ops.xp_destroy = svc_vc_destroy;
713 ops2.xp_control = svc_vc_rendezvous_control;
714 }
715 xprt->xp_ops = &ops;
716 xprt->xp_ops2 = &ops2;
717 mutex_unlock(&ops_lock);
718}
719
720/*
721 * Get the effective UID of the sending process. Used by rpcbind, keyserv
722 * and rpc.yppasswdd on AF_LOCAL.
723 */
724int
725__rpc_get_local_uid(SVCXPRT *transp, uid_t *uid) {
726 int sock, ret;
727 gid_t egid;
728 uid_t euid;
729 struct sockaddr *sa;
730
731 sock = transp->xp_fd;
732 sa = (struct sockaddr *)transp->xp_rtaddr.buf;
733 if (sa->sa_family == AF_LOCAL) {
734 ret = getpeereid(sock, &euid, &egid);
735 if (ret == 0)
736 *uid = euid;
737 return (ret);
738 } else
739 return (-1);
740}
741
742/*
743 * Destroy xprts that have not have had any activity in 'timeout' seconds.
744 * If 'cleanblock' is true, blocking connections (the default) are also
745 * cleaned. If timeout is 0, the least active connection is picked.
746 */
747bool_t
748__svc_clean_idle(fd_set *fds, int timeout, bool_t cleanblock)
749{
750 int i, ncleaned;
751 SVCXPRT *xprt, *least_active;
752 struct timeval tv, tdiff, tmax;
753 struct cf_conn *cd;
754
755 gettimeofday(&tv, NULL);
756 tmax.tv_sec = tmax.tv_usec = 0;
757 least_active = NULL;
758 rwlock_wrlock(&svc_fd_lock);
759 for (i = ncleaned = 0; i <= svc_maxfd; i++) {
760 if (FD_ISSET(i, fds)) {
761 xprt = __svc_xports[i];
762 if (xprt == NULL || xprt->xp_ops == NULL ||
763 xprt->xp_ops->xp_recv != svc_vc_recv)
764 continue;
765 cd = (struct cf_conn *)xprt->xp_p1;
766 if (!cleanblock && !cd->nonblock)
767 continue;
768 if (timeout == 0) {
769 timersub(&tv, &cd->last_recv_time, &tdiff);
770 if (timercmp(&tdiff, &tmax, >)) {
771 tmax = tdiff;
772 least_active = xprt;
773 }
774 continue;
775 }
776 if (tv.tv_sec - cd->last_recv_time.tv_sec > timeout) {
777 __xprt_unregister_unlocked(xprt);
778 __svc_vc_dodestroy(xprt);
779 ncleaned++;
780 }
781 }
782 }
783 if (timeout == 0 && least_active != NULL) {
784 __xprt_unregister_unlocked(least_active);
785 __svc_vc_dodestroy(least_active);
786 ncleaned++;
787 }
788 rwlock_unlock(&svc_fd_lock);
789 return ncleaned > 0 ? TRUE : FALSE;
790}
2
3/*
4 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
5 * unrestricted use provided that this legend is included on all tape
6 * media and as a part of the software program in whole or part. Users
7 * may copy or modify Sun RPC without charge, but are not authorized
8 * to license or distribute it to anyone else except as part of a product or
9 * program developed by the user.
10 *
11 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
12 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
13 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
14 *
15 * Sun RPC is provided with no support and without any obligation on the
16 * part of Sun Microsystems, Inc. to assist in its use, correction,
17 * modification or enhancement.
18 *
19 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
20 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
21 * OR ANY PART THEREOF.
22 *
23 * In no event will Sun Microsystems, Inc. be liable for any lost revenue
24 * or profits or other special, indirect and consequential damages, even if
25 * Sun has been advised of the possibility of such damages.
26 *
27 * Sun Microsystems, Inc.
28 * 2550 Garcia Avenue
29 * Mountain View, California 94043
30 */
31
32#if defined(LIBC_SCCS) && !defined(lint)
33static char *sccsid2 = "@(#)svc_tcp.c 1.21 87/08/11 Copyr 1984 Sun Micro";
34static char *sccsid = "@(#)svc_tcp.c 2.2 88/08/01 4.0 RPCSRC";
35#endif
36#include <sys/cdefs.h>
37__FBSDID("$FreeBSD: head/lib/libc/rpc/svc_vc.c 162196 2006-09-09 22:33:21Z mbr $");
38
39/*
40 * svc_vc.c, Server side for Connection Oriented based RPC.
41 *
42 * Actually implements two flavors of transporter -
43 * a tcp rendezvouser (a listner and connection establisher)
44 * and a record/tcp stream.
45 */
46
47#include "namespace.h"
48#include "reentrant.h"
49#include <sys/types.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
74static SVCXPRT *makefd_xprt(int, u_int, u_int);
75static bool_t rendezvous_request(SVCXPRT *, struct rpc_msg *);
76static enum xprt_stat rendezvous_stat(SVCXPRT *);
77static void svc_vc_destroy(SVCXPRT *);
78static void __svc_vc_dodestroy (SVCXPRT *);
79static int read_vc(void *, void *, int);
80static int write_vc(void *, void *, int);
81static enum xprt_stat svc_vc_stat(SVCXPRT *);
82static bool_t svc_vc_recv(SVCXPRT *, struct rpc_msg *);
83static bool_t svc_vc_getargs(SVCXPRT *, xdrproc_t, void *);
84static bool_t svc_vc_freeargs(SVCXPRT *, xdrproc_t, void *);
85static bool_t svc_vc_reply(SVCXPRT *, struct rpc_msg *);
86static void svc_vc_rendezvous_ops(SVCXPRT *);
87static void svc_vc_ops(SVCXPRT *);
88static bool_t svc_vc_control(SVCXPRT *xprt, const u_int rq, void *in);
89static bool_t svc_vc_rendezvous_control (SVCXPRT *xprt, const u_int rq,
90 void *in);
91
92struct cf_rendezvous { /* kept in xprt->xp_p1 for rendezvouser */
93 u_int sendsize;
94 u_int recvsize;
95 int maxrec;
96};
97
98struct 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 */
126SVCXPRT *
127svc_vc_create(fd, sendsize, recvsize)
128 int fd;
129 u_int sendsize;
130 u_int recvsize;
131{
132 SVCXPRT *xprt;
133 struct cf_rendezvous *r = NULL;
134 struct __rpc_sockinfo si;
135 struct sockaddr_storage sslocal;
136 socklen_t slen;
137
138 if (!__rpc_fd2sockinfo(fd, &si))
139 return NULL;
140
141 r = mem_alloc(sizeof(*r));
142 if (r == NULL) {
143 warnx("svc_vc_create: out of memory");
144 goto cleanup_svc_vc_create;
145 }
146 r->sendsize = __rpc_get_t_size(si.si_af, si.si_proto, (int)sendsize);
147 r->recvsize = __rpc_get_t_size(si.si_af, si.si_proto, (int)recvsize);
148 r->maxrec = __svc_maxrec;
149 xprt = mem_alloc(sizeof(SVCXPRT));
150 if (xprt == NULL) {
151 warnx("svc_vc_create: out of memory");
152 goto cleanup_svc_vc_create;
153 }
154 xprt->xp_tp = NULL;
155 xprt->xp_p1 = r;
156 xprt->xp_p2 = NULL;
157 xprt->xp_p3 = NULL;
158 xprt->xp_verf = _null_auth;
159 svc_vc_rendezvous_ops(xprt);
160 xprt->xp_port = (u_short)-1; /* It is the rendezvouser */
161 xprt->xp_fd = fd;
162
163 slen = sizeof (struct sockaddr_storage);
164 if (_getsockname(fd, (struct sockaddr *)(void *)&sslocal, &slen) < 0) {
165 warnx("svc_vc_create: could not retrieve local addr");
166 goto cleanup_svc_vc_create;
167 }
168
169 xprt->xp_ltaddr.maxlen = xprt->xp_ltaddr.len = sslocal.ss_len;
170 xprt->xp_ltaddr.buf = mem_alloc((size_t)sslocal.ss_len);
171 if (xprt->xp_ltaddr.buf == NULL) {
172 warnx("svc_vc_create: no mem for local addr");
173 goto cleanup_svc_vc_create;
174 }
175 memcpy(xprt->xp_ltaddr.buf, &sslocal, (size_t)sslocal.ss_len);
176
177 xprt->xp_rtaddr.maxlen = sizeof (struct sockaddr_storage);
178 xprt_register(xprt);
179 return (xprt);
180cleanup_svc_vc_create:
181 if (xprt)
182 mem_free(xprt, sizeof(*xprt));
183 if (r != NULL)
184 mem_free(r, sizeof(*r));
185 return (NULL);
186}
187
188/*
189 * Like svtcp_create(), except the routine takes any *open* UNIX file
190 * descriptor as its first input.
191 */
192SVCXPRT *
193svc_fd_create(fd, sendsize, recvsize)
194 int fd;
195 u_int sendsize;
196 u_int recvsize;
197{
198 struct sockaddr_storage ss;
199 socklen_t slen;
200 SVCXPRT *ret;
201
202 assert(fd != -1);
203
204 ret = makefd_xprt(fd, sendsize, recvsize);
205 if (ret == NULL)
206 return NULL;
207
208 slen = sizeof (struct sockaddr_storage);
209 if (_getsockname(fd, (struct sockaddr *)(void *)&ss, &slen) < 0) {
210 warnx("svc_fd_create: could not retrieve local addr");
211 goto freedata;
212 }
213 ret->xp_ltaddr.maxlen = ret->xp_ltaddr.len = ss.ss_len;
214 ret->xp_ltaddr.buf = mem_alloc((size_t)ss.ss_len);
215 if (ret->xp_ltaddr.buf == NULL) {
216 warnx("svc_fd_create: no mem for local addr");
217 goto freedata;
218 }
219 memcpy(ret->xp_ltaddr.buf, &ss, (size_t)ss.ss_len);
220
221 slen = sizeof (struct sockaddr_storage);
222 if (_getpeername(fd, (struct sockaddr *)(void *)&ss, &slen) < 0) {
223 warnx("svc_fd_create: could not retrieve remote addr");
224 goto freedata;
225 }
226 ret->xp_rtaddr.maxlen = ret->xp_rtaddr.len = ss.ss_len;
227 ret->xp_rtaddr.buf = mem_alloc((size_t)ss.ss_len);
228 if (ret->xp_rtaddr.buf == NULL) {
229 warnx("svc_fd_create: no mem for local addr");
230 goto freedata;
231 }
232 memcpy(ret->xp_rtaddr.buf, &ss, (size_t)ss.ss_len);
233#ifdef PORTMAP
234 if (ss.ss_family == AF_INET || ss.ss_family == AF_LOCAL) {
235 ret->xp_raddr = *(struct sockaddr_in *)ret->xp_rtaddr.buf;
236 ret->xp_addrlen = sizeof (struct sockaddr_in);
237 }
238#endif /* PORTMAP */
239
240 return ret;
241
242freedata:
243 if (ret->xp_ltaddr.buf != NULL)
244 mem_free(ret->xp_ltaddr.buf, rep->xp_ltaddr.maxlen);
245
246 return NULL;
247}
248
249static SVCXPRT *
250makefd_xprt(fd, sendsize, recvsize)
251 int fd;
252 u_int sendsize;
253 u_int recvsize;
254{
255 SVCXPRT *xprt;
256 struct cf_conn *cd;
257 const char *netid;
258 struct __rpc_sockinfo si;
259
260 assert(fd != -1);
261
262 xprt = mem_alloc(sizeof(SVCXPRT));
263 if (xprt == NULL) {
264 warnx("svc_vc: makefd_xprt: out of memory");
265 goto done;
266 }
267 memset(xprt, 0, sizeof *xprt);
268 cd = mem_alloc(sizeof(struct cf_conn));
269 if (cd == NULL) {
270 warnx("svc_tcp: makefd_xprt: out of memory");
271 mem_free(xprt, sizeof(SVCXPRT));
272 xprt = NULL;
273 goto done;
274 }
275 cd->strm_stat = XPRT_IDLE;
276 xdrrec_create(&(cd->xdrs), sendsize, recvsize,
277 xprt, read_vc, write_vc);
278 xprt->xp_p1 = cd;
279 xprt->xp_verf.oa_base = cd->verf_body;
280 svc_vc_ops(xprt); /* truely deals with calls */
281 xprt->xp_port = 0; /* this is a connection, not a rendezvouser */
282 xprt->xp_fd = fd;
283 if (__rpc_fd2sockinfo(fd, &si) && __rpc_sockinfo2netid(&si, &netid))
284 xprt->xp_netid = strdup(netid);
285
286 xprt_register(xprt);
287done:
288 return (xprt);
289}
290
291/*ARGSUSED*/
292static bool_t
293rendezvous_request(xprt, msg)
294 SVCXPRT *xprt;
295 struct rpc_msg *msg;
296{
297 int sock, flags;
298 struct cf_rendezvous *r;
299 struct cf_conn *cd;
300 struct sockaddr_storage addr;
301 socklen_t len;
302 struct __rpc_sockinfo si;
303 SVCXPRT *newxprt;
304 fd_set cleanfds;
305
306 assert(xprt != NULL);
307 assert(msg != NULL);
308
309 r = (struct cf_rendezvous *)xprt->xp_p1;
310again:
311 len = sizeof addr;
312 if ((sock = _accept(xprt->xp_fd, (struct sockaddr *)(void *)&addr,
313 &len)) < 0) {
314 if (errno == EINTR)
315 goto again;
316 /*
317 * Clean out the most idle file descriptor when we're
318 * running out.
319 */
320 if (errno == EMFILE || errno == ENFILE) {
321 cleanfds = svc_fdset;
322 __svc_clean_idle(&cleanfds, 0, FALSE);
323 goto again;
324 }
325 return (FALSE);
326 }
327 /*
328 * make a new transporter (re-uses xprt)
329 */
330 newxprt = makefd_xprt(sock, r->sendsize, r->recvsize);
331 newxprt->xp_rtaddr.buf = mem_alloc(len);
332 if (newxprt->xp_rtaddr.buf == NULL)
333 return (FALSE);
334 memcpy(newxprt->xp_rtaddr.buf, &addr, len);
335 newxprt->xp_rtaddr.len = len;
336#ifdef PORTMAP
337 if (addr.ss_family == AF_INET || addr.ss_family == AF_LOCAL) {
338 newxprt->xp_raddr = *(struct sockaddr_in *)newxprt->xp_rtaddr.buf;
339 newxprt->xp_addrlen = sizeof (struct sockaddr_in);
340 }
341#endif /* PORTMAP */
342 if (__rpc_fd2sockinfo(sock, &si) && si.si_proto == IPPROTO_TCP) {
343 len = 1;
344 /* XXX fvdl - is this useful? */
345 _setsockopt(sock, IPPROTO_TCP, TCP_NODELAY, &len, sizeof (len));
346 }
347
348 cd = (struct cf_conn *)newxprt->xp_p1;
349
350 cd->recvsize = r->recvsize;
351 cd->sendsize = r->sendsize;
352 cd->maxrec = r->maxrec;
353
354 if (cd->maxrec != 0) {
355 flags = _fcntl(sock, F_GETFL, 0);
356 if (flags == -1)
357 return (FALSE);
358 if (_fcntl(sock, F_SETFL, flags | O_NONBLOCK) == -1)
359 return (FALSE);
360 if (cd->recvsize > cd->maxrec)
361 cd->recvsize = cd->maxrec;
362 cd->nonblock = TRUE;
363 __xdrrec_setnonblock(&cd->xdrs, cd->maxrec);
364 } else
365 cd->nonblock = FALSE;
366
367 gettimeofday(&cd->last_recv_time, NULL);
368
369 return (FALSE); /* there is never an rpc msg to be processed */
370}
371
372/*ARGSUSED*/
373static enum xprt_stat
374rendezvous_stat(xprt)
375 SVCXPRT *xprt;
376{
377
378 return (XPRT_IDLE);
379}
380
381static void
382svc_vc_destroy(xprt)
383 SVCXPRT *xprt;
384{
385 assert(xprt != NULL);
386
387 xprt_unregister(xprt);
388 __svc_vc_dodestroy(xprt);
389}
390
391static void
392__svc_vc_dodestroy(xprt)
393 SVCXPRT *xprt;
394{
395 struct cf_conn *cd;
396 struct cf_rendezvous *r;
397
398 cd = (struct cf_conn *)xprt->xp_p1;
399
400 if (xprt->xp_fd != RPC_ANYFD)
401 (void)_close(xprt->xp_fd);
402 if (xprt->xp_port != 0) {
403 /* a rendezvouser socket */
404 r = (struct cf_rendezvous *)xprt->xp_p1;
405 mem_free(r, sizeof (struct cf_rendezvous));
406 xprt->xp_port = 0;
407 } else {
408 /* an actual connection socket */
409 XDR_DESTROY(&(cd->xdrs));
410 mem_free(cd, sizeof(struct cf_conn));
411 }
412 if (xprt->xp_rtaddr.buf)
413 mem_free(xprt->xp_rtaddr.buf, xprt->xp_rtaddr.maxlen);
414 if (xprt->xp_ltaddr.buf)
415 mem_free(xprt->xp_ltaddr.buf, xprt->xp_ltaddr.maxlen);
416 if (xprt->xp_tp)
417 free(xprt->xp_tp);
418 if (xprt->xp_netid)
419 free(xprt->xp_netid);
420 mem_free(xprt, sizeof(SVCXPRT));
421}
422
423/*ARGSUSED*/
424static bool_t
425svc_vc_control(xprt, rq, in)
426 SVCXPRT *xprt;
427 const u_int rq;
428 void *in;
429{
430 return (FALSE);
431}
432
433static bool_t
434svc_vc_rendezvous_control(xprt, rq, in)
435 SVCXPRT *xprt;
436 const u_int rq;
437 void *in;
438{
439 struct cf_rendezvous *cfp;
440
441 cfp = (struct cf_rendezvous *)xprt->xp_p1;
442 if (cfp == NULL)
443 return (FALSE);
444 switch (rq) {
445 case SVCGET_CONNMAXREC:
446 *(int *)in = cfp->maxrec;
447 break;
448 case SVCSET_CONNMAXREC:
449 cfp->maxrec = *(int *)in;
450 break;
451 default:
452 return (FALSE);
453 }
454 return (TRUE);
455}
456
457/*
458 * reads data from the tcp or uip connection.
459 * any error is fatal and the connection is closed.
460 * (And a read of zero bytes is a half closed stream => error.)
461 * All read operations timeout after 35 seconds. A timeout is
462 * fatal for the connection.
463 */
464static int
465read_vc(xprtp, buf, len)
466 void *xprtp;
467 void *buf;
468 int len;
469{
470 SVCXPRT *xprt;
471 int sock;
472 int milliseconds = 35 * 1000;
473 struct pollfd pollfd;
474 struct cf_conn *cfp;
475
476 xprt = (SVCXPRT *)xprtp;
477 assert(xprt != NULL);
478
479 sock = xprt->xp_fd;
480
481 cfp = (struct cf_conn *)xprt->xp_p1;
482
483 if (cfp->nonblock) {
484 len = _read(sock, buf, (size_t)len);
485 if (len < 0) {
486 if (errno == EAGAIN)
487 len = 0;
488 else
489 goto fatal_err;
490 }
491 if (len != 0)
492 gettimeofday(&cfp->last_recv_time, NULL);
493 return len;
494 }
495
496 do {
497 pollfd.fd = sock;
498 pollfd.events = POLLIN;
499 pollfd.revents = 0;
500 switch (_poll(&pollfd, 1, milliseconds)) {
501 case -1:
502 if (errno == EINTR)
503 continue;
504 /*FALLTHROUGH*/
505 case 0:
506 goto fatal_err;
507
508 default:
509 break;
510 }
511 } while ((pollfd.revents & POLLIN) == 0);
512
513 if ((len = _read(sock, buf, (size_t)len)) > 0) {
514 gettimeofday(&cfp->last_recv_time, NULL);
515 return (len);
516 }
517
518fatal_err:
519 ((struct cf_conn *)(xprt->xp_p1))->strm_stat = XPRT_DIED;
520 return (-1);
521}
522
523/*
524 * writes data to the tcp connection.
525 * Any error is fatal and the connection is closed.
526 */
527static int
528write_vc(xprtp, buf, len)
529 void *xprtp;
530 void *buf;
531 int len;
532{
533 SVCXPRT *xprt;
534 int i, cnt;
535 struct cf_conn *cd;
536 struct timeval tv0, tv1;
537
538 xprt = (SVCXPRT *)xprtp;
539 assert(xprt != NULL);
540
541 cd = (struct cf_conn *)xprt->xp_p1;
542
543 if (cd->nonblock)
544 gettimeofday(&tv0, NULL);
545
546 for (cnt = len; cnt > 0; cnt -= i, buf = (char *)buf + i) {
547 i = _write(xprt->xp_fd, buf, (size_t)cnt);
548 if (i < 0) {
549 if (errno != EAGAIN || !cd->nonblock) {
550 cd->strm_stat = XPRT_DIED;
551 return (-1);
552 }
553 if (cd->nonblock && i != cnt) {
554 /*
555 * For non-blocking connections, do not
556 * take more than 2 seconds writing the
557 * data out.
558 *
559 * XXX 2 is an arbitrary amount.
560 */
561 gettimeofday(&tv1, NULL);
562 if (tv1.tv_sec - tv0.tv_sec >= 2) {
563 cd->strm_stat = XPRT_DIED;
564 return (-1);
565 }
566 }
567 }
568 }
569
570 return (len);
571}
572
573static enum xprt_stat
574svc_vc_stat(xprt)
575 SVCXPRT *xprt;
576{
577 struct cf_conn *cd;
578
579 assert(xprt != NULL);
580
581 cd = (struct cf_conn *)(xprt->xp_p1);
582
583 if (cd->strm_stat == XPRT_DIED)
584 return (XPRT_DIED);
585 if (! xdrrec_eof(&(cd->xdrs)))
586 return (XPRT_MOREREQS);
587 return (XPRT_IDLE);
588}
589
590static bool_t
591svc_vc_recv(xprt, msg)
592 SVCXPRT *xprt;
593 struct rpc_msg *msg;
594{
595 struct cf_conn *cd;
596 XDR *xdrs;
597
598 assert(xprt != NULL);
599 assert(msg != NULL);
600
601 cd = (struct cf_conn *)(xprt->xp_p1);
602 xdrs = &(cd->xdrs);
603
604 if (cd->nonblock) {
605 if (!__xdrrec_getrec(xdrs, &cd->strm_stat, TRUE))
606 return FALSE;
607 }
608
609 xdrs->x_op = XDR_DECODE;
610 (void)xdrrec_skiprecord(xdrs);
611 if (xdr_callmsg(xdrs, msg)) {
612 cd->x_id = msg->rm_xid;
613 return (TRUE);
614 }
615 cd->strm_stat = XPRT_DIED;
616 return (FALSE);
617}
618
619static bool_t
620svc_vc_getargs(xprt, xdr_args, args_ptr)
621 SVCXPRT *xprt;
622 xdrproc_t xdr_args;
623 void *args_ptr;
624{
625
626 assert(xprt != NULL);
627 /* args_ptr may be NULL */
628 return ((*xdr_args)(&(((struct cf_conn *)(xprt->xp_p1))->xdrs),
629 args_ptr));
630}
631
632static bool_t
633svc_vc_freeargs(xprt, xdr_args, args_ptr)
634 SVCXPRT *xprt;
635 xdrproc_t xdr_args;
636 void *args_ptr;
637{
638 XDR *xdrs;
639
640 assert(xprt != NULL);
641 /* args_ptr may be NULL */
642
643 xdrs = &(((struct cf_conn *)(xprt->xp_p1))->xdrs);
644
645 xdrs->x_op = XDR_FREE;
646 return ((*xdr_args)(xdrs, args_ptr));
647}
648
649static bool_t
650svc_vc_reply(xprt, msg)
651 SVCXPRT *xprt;
652 struct rpc_msg *msg;
653{
654 struct cf_conn *cd;
655 XDR *xdrs;
656 bool_t rstat;
657
658 assert(xprt != NULL);
659 assert(msg != NULL);
660
661 cd = (struct cf_conn *)(xprt->xp_p1);
662 xdrs = &(cd->xdrs);
663
664 xdrs->x_op = XDR_ENCODE;
665 msg->rm_xid = cd->x_id;
666 rstat = xdr_replymsg(xdrs, msg);
667 (void)xdrrec_endofrecord(xdrs, TRUE);
668 return (rstat);
669}
670
671static void
672svc_vc_ops(xprt)
673 SVCXPRT *xprt;
674{
675 static struct xp_ops ops;
676 static struct xp_ops2 ops2;
677
678/* VARIABLES PROTECTED BY ops_lock: ops, ops2 */
679
680 mutex_lock(&ops_lock);
681 if (ops.xp_recv == NULL) {
682 ops.xp_recv = svc_vc_recv;
683 ops.xp_stat = svc_vc_stat;
684 ops.xp_getargs = svc_vc_getargs;
685 ops.xp_reply = svc_vc_reply;
686 ops.xp_freeargs = svc_vc_freeargs;
687 ops.xp_destroy = svc_vc_destroy;
688 ops2.xp_control = svc_vc_control;
689 }
690 xprt->xp_ops = &ops;
691 xprt->xp_ops2 = &ops2;
692 mutex_unlock(&ops_lock);
693}
694
695static void
696svc_vc_rendezvous_ops(xprt)
697 SVCXPRT *xprt;
698{
699 static struct xp_ops ops;
700 static struct xp_ops2 ops2;
701
702 mutex_lock(&ops_lock);
703 if (ops.xp_recv == NULL) {
704 ops.xp_recv = rendezvous_request;
705 ops.xp_stat = rendezvous_stat;
706 ops.xp_getargs =
707 (bool_t (*)(SVCXPRT *, xdrproc_t, void *))abort;
708 ops.xp_reply =
709 (bool_t (*)(SVCXPRT *, struct rpc_msg *))abort;
710 ops.xp_freeargs =
711 (bool_t (*)(SVCXPRT *, xdrproc_t, void *))abort,
712 ops.xp_destroy = svc_vc_destroy;
713 ops2.xp_control = svc_vc_rendezvous_control;
714 }
715 xprt->xp_ops = &ops;
716 xprt->xp_ops2 = &ops2;
717 mutex_unlock(&ops_lock);
718}
719
720/*
721 * Get the effective UID of the sending process. Used by rpcbind, keyserv
722 * and rpc.yppasswdd on AF_LOCAL.
723 */
724int
725__rpc_get_local_uid(SVCXPRT *transp, uid_t *uid) {
726 int sock, ret;
727 gid_t egid;
728 uid_t euid;
729 struct sockaddr *sa;
730
731 sock = transp->xp_fd;
732 sa = (struct sockaddr *)transp->xp_rtaddr.buf;
733 if (sa->sa_family == AF_LOCAL) {
734 ret = getpeereid(sock, &euid, &egid);
735 if (ret == 0)
736 *uid = euid;
737 return (ret);
738 } else
739 return (-1);
740}
741
742/*
743 * Destroy xprts that have not have had any activity in 'timeout' seconds.
744 * If 'cleanblock' is true, blocking connections (the default) are also
745 * cleaned. If timeout is 0, the least active connection is picked.
746 */
747bool_t
748__svc_clean_idle(fd_set *fds, int timeout, bool_t cleanblock)
749{
750 int i, ncleaned;
751 SVCXPRT *xprt, *least_active;
752 struct timeval tv, tdiff, tmax;
753 struct cf_conn *cd;
754
755 gettimeofday(&tv, NULL);
756 tmax.tv_sec = tmax.tv_usec = 0;
757 least_active = NULL;
758 rwlock_wrlock(&svc_fd_lock);
759 for (i = ncleaned = 0; i <= svc_maxfd; i++) {
760 if (FD_ISSET(i, fds)) {
761 xprt = __svc_xports[i];
762 if (xprt == NULL || xprt->xp_ops == NULL ||
763 xprt->xp_ops->xp_recv != svc_vc_recv)
764 continue;
765 cd = (struct cf_conn *)xprt->xp_p1;
766 if (!cleanblock && !cd->nonblock)
767 continue;
768 if (timeout == 0) {
769 timersub(&tv, &cd->last_recv_time, &tdiff);
770 if (timercmp(&tdiff, &tmax, >)) {
771 tmax = tdiff;
772 least_active = xprt;
773 }
774 continue;
775 }
776 if (tv.tv_sec - cd->last_recv_time.tv_sec > timeout) {
777 __xprt_unregister_unlocked(xprt);
778 __svc_vc_dodestroy(xprt);
779 ncleaned++;
780 }
781 }
782 }
783 if (timeout == 0 && least_active != NULL) {
784 __xprt_unregister_unlocked(least_active);
785 __svc_vc_dodestroy(least_active);
786 ncleaned++;
787 }
788 rwlock_unlock(&svc_fd_lock);
789 return ncleaned > 0 ? TRUE : FALSE;
790}