1/* $NetBSD: svc_vc.c,v 1.7 2000/08/03 00:01:53 fvdl Exp $ */
2/* $FreeBSD: head/lib/libc/rpc/svc_vc.c 90272 2002-02-05 23:46:37Z alfred $ */
3
4/*
5 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
6 * unrestricted use provided that this legend is included on all tape
7 * media and as a part of the software program in whole or part. Users
8 * may copy or modify Sun RPC without charge, but are not authorized
9 * to license or distribute it to anyone else except as part of a product or
10 * program developed by the user.
11 *
12 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
13 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
14 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
15 *
16 * Sun RPC is provided with no support and without any obligation on the
17 * part of Sun Microsystems, Inc. to assist in its use, correction,
18 * modification or enhancement.
19 *
20 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
21 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
22 * OR ANY PART THEREOF.
23 *
24 * In no event will Sun Microsystems, Inc. be liable for any lost revenue
25 * or profits or other special, indirect and consequential damages, even if
26 * Sun has been advised of the possibility of such damages.
27 *
28 * Sun Microsystems, Inc.
29 * 2550 Garcia Avenue
30 * Mountain View, California 94043
31 */
32
33#include <sys/cdefs.h>
34#if defined(LIBC_SCCS) && !defined(lint)
35static char *sccsid = "@(#)svc_tcp.c 1.21 87/08/11 Copyr 1984 Sun Micro";
36static char *sccsid = "@(#)svc_tcp.c 2.2 88/08/01 4.0 RPCSRC";
37#endif
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/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 <stdio.h>
62#include <stdlib.h>
63#include <string.h>
64#include <unistd.h>
65
66#include <rpc/rpc.h>
67
68#include "rpc_com.h"
69#include "un-namespace.h"
70
71struct cmessage {
72 struct cmsghdr cmsg;
73 struct cmsgcred cmcred;
74};
75
76static SVCXPRT *makefd_xprt __P((int, u_int, u_int));
77static bool_t rendezvous_request __P((SVCXPRT *, struct rpc_msg *));
78static enum xprt_stat rendezvous_stat __P((SVCXPRT *));
79static void svc_vc_destroy __P((SVCXPRT *));
80static int read_vc __P((caddr_t, caddr_t, int));
81static int write_vc __P((caddr_t, caddr_t, int));
82static enum xprt_stat svc_vc_stat __P((SVCXPRT *));
83static bool_t svc_vc_recv __P((SVCXPRT *, struct rpc_msg *));
84static bool_t svc_vc_getargs __P((SVCXPRT *, xdrproc_t, caddr_t));
85static bool_t svc_vc_freeargs __P((SVCXPRT *, xdrproc_t, caddr_t));
86static bool_t svc_vc_reply __P((SVCXPRT *, struct rpc_msg *));
87static void svc_vc_rendezvous_ops __P((SVCXPRT *));
88static void svc_vc_ops __P((SVCXPRT *));
89static bool_t svc_vc_control __P((SVCXPRT *xprt, const u_int rq, void *in));
90static int __msgread_withcred(int, void *, size_t, struct cmessage *);
91static int __msgwrite(int, void *, size_t);
92
93struct cf_rendezvous { /* kept in xprt->xp_p1 for rendezvouser */
94 u_int sendsize;
95 u_int recvsize;
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};
104
105/*
106 * Usage:
107 * xprt = svc_vc_create(sock, send_buf_size, recv_buf_size);
108 *
109 * Creates, registers, and returns a (rpc) tcp based transporter.
110 * Once *xprt is initialized, it is registered as a transporter
111 * see (svc.h, xprt_register). This routine returns
112 * a NULL if a problem occurred.
113 *
114 * The filedescriptor passed in is expected to refer to a bound, but
115 * not yet connected socket.
116 *
117 * Since streams do buffered io similar to stdio, the caller can specify
118 * how big the send and receive buffers are via the second and third parms;
119 * 0 => use the system default.
120 */
121SVCXPRT *
122svc_vc_create(fd, sendsize, recvsize)
123 int fd;
124 u_int sendsize;
125 u_int recvsize;
126{
127 SVCXPRT *xprt;
128 struct cf_rendezvous *r = NULL;
129 struct __rpc_sockinfo si;
130 struct sockaddr_storage sslocal;
131 socklen_t slen;
132
133 r = mem_alloc(sizeof(*r));
134 if (r == NULL) {
135 warnx("svc_vc_create: out of memory");
136 goto cleanup_svc_vc_create;
137 }
138 if (!__rpc_fd2sockinfo(fd, &si))
139 return NULL;
140 r->sendsize = __rpc_get_t_size(si.si_af, si.si_proto, (int)sendsize);
141 r->recvsize = __rpc_get_t_size(si.si_af, si.si_proto, (int)recvsize);
142 xprt = mem_alloc(sizeof(SVCXPRT));
143 if (xprt == NULL) {
144 warnx("svc_vc_create: out of memory");
145 goto cleanup_svc_vc_create;
146 }
147 xprt->xp_tp = NULL;
148 xprt->xp_p1 = (caddr_t)(void *)r;
149 xprt->xp_p2 = NULL;
150 xprt->xp_p3 = NULL;
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);
173cleanup_svc_vc_create:
174 if (r != NULL)
175 mem_free(r, sizeof(*r));
176 return (NULL);
177}
178
179/*
180 * Like svtcp_create(), except the routine takes any *open* UNIX file
181 * descriptor as its first input.
182 */
183SVCXPRT *
184svc_fd_create(fd, sendsize, recvsize)
185 int fd;
186 u_int sendsize;
187 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
233freedata:
234 if (ret->xp_ltaddr.buf != NULL)
235 mem_free(ret->xp_ltaddr.buf, rep->xp_ltaddr.maxlen);
236
237 return NULL;
238}
239
240static SVCXPRT *
241makefd_xprt(fd, sendsize, recvsize)
242 int fd;
243 u_int sendsize;
244 u_int recvsize;
245{
246 SVCXPRT *xprt;
247 struct cf_conn *cd;
248 const char *netid;
249 struct __rpc_sockinfo si;
250
251 assert(fd != -1);
252
253 xprt = mem_alloc(sizeof(SVCXPRT));
254 if (xprt == NULL) {
255 warnx("svc_vc: makefd_xprt: out of memory");
256 goto done;
257 }
258 memset(xprt, 0, sizeof *xprt);
259 cd = mem_alloc(sizeof(struct cf_conn));
260 if (cd == NULL) {
261 warnx("svc_tcp: makefd_xprt: out of memory");
262 mem_free(xprt, sizeof(SVCXPRT));
263 xprt = NULL;
264 goto done;
265 }
266 cd->strm_stat = XPRT_IDLE;
267 xdrrec_create(&(cd->xdrs), sendsize, recvsize,
268 (caddr_t)(void *)xprt, read_vc, write_vc);
269 xprt->xp_p1 = (caddr_t)(void *)cd;
270 xprt->xp_verf.oa_base = cd->verf_body;
271 svc_vc_ops(xprt); /* truely deals with calls */
272 xprt->xp_port = 0; /* this is a connection, not a rendezvouser */
273 xprt->xp_fd = fd;
274 if (__rpc_fd2sockinfo(fd, &si) && __rpc_sockinfo2netid(&si, &netid))
275 xprt->xp_netid = strdup(netid);
276
277 xprt_register(xprt);
278done:
279 return (xprt);
280}
281
282/*ARGSUSED*/
283static bool_t
284rendezvous_request(xprt, msg)
285 SVCXPRT *xprt;
286 struct rpc_msg *msg;
287{
288 int sock;
289 struct cf_rendezvous *r;
290 struct sockaddr_storage addr;
291 socklen_t len;
292 struct __rpc_sockinfo si;
293
294 assert(xprt != NULL);
295 assert(msg != NULL);
296
297 r = (struct cf_rendezvous *)xprt->xp_p1;
298again:
299 len = sizeof addr;
300 if ((sock = _accept(xprt->xp_fd, (struct sockaddr *)(void *)&addr,
301 &len)) < 0) {
302 if (errno == EINTR)
303 goto again;
304 return (FALSE);
305 }
306 /*
307 * make a new transporter (re-uses xprt)
308 */
309 xprt = makefd_xprt(sock, r->sendsize, r->recvsize);
310 xprt->xp_rtaddr.buf = mem_alloc(len);
311 if (xprt->xp_rtaddr.buf == NULL)
312 return (FALSE);
313 memcpy(xprt->xp_rtaddr.buf, &addr, len);
314 xprt->xp_rtaddr.len = len;
315 if (addr.ss_family == AF_LOCAL) {
316 xprt->xp_raddr = *(struct sockaddr_in *)xprt->xp_rtaddr.buf;
317 xprt->xp_addrlen = sizeof (struct sockaddr_in);
318 }
319#ifdef PORTMAP
320 if (addr.ss_family == AF_INET) {
321 xprt->xp_raddr = *(struct sockaddr_in *)xprt->xp_rtaddr.buf;
322 xprt->xp_addrlen = sizeof (struct sockaddr_in);
323 }
324#endif /* PORTMAP */
325 if (__rpc_fd2sockinfo(sock, &si) && si.si_proto == IPPROTO_TCP) {
326 len = 1;
327 /* XXX fvdl - is this useful? */
328 _setsockopt(sock, IPPROTO_TCP, TCP_NODELAY, &len, sizeof (len));
329 }
330 return (FALSE); /* there is never an rpc msg to be processed */
331}
332
333/*ARGSUSED*/
334static enum xprt_stat
335rendezvous_stat(xprt)
336 SVCXPRT *xprt;
337{
338
339 return (XPRT_IDLE);
340}
341
342static void
343svc_vc_destroy(xprt)
344 SVCXPRT *xprt;
345{
346 struct cf_conn *cd;
347 struct cf_rendezvous *r;
348
349 assert(xprt != NULL);
350
351 cd = (struct cf_conn *)xprt->xp_p1;
352
353 xprt_unregister(xprt);
354 if (xprt->xp_fd != RPC_ANYFD)
355 (void)_close(xprt->xp_fd);
356 if (xprt->xp_port != 0) {
357 /* a rendezvouser socket */
358 r = (struct cf_rendezvous *)xprt->xp_p1;
359 mem_free(r, sizeof (struct cf_rendezvous));
360 xprt->xp_port = 0;
361 } else {
362 /* an actual connection socket */
363 XDR_DESTROY(&(cd->xdrs));
364 mem_free(cd, sizeof(struct cf_conn));
365 }
366 if (xprt->xp_rtaddr.buf)
367 mem_free(xprt->xp_rtaddr.buf, xprt->xp_rtaddr.maxlen);
368 if (xprt->xp_ltaddr.buf)
369 mem_free(xprt->xp_ltaddr.buf, xprt->xp_ltaddr.maxlen);
370 if (xprt->xp_tp)
371 free(xprt->xp_tp);
372 if (xprt->xp_netid)
373 free(xprt->xp_netid);
374 mem_free(xprt, sizeof(SVCXPRT));
375}
376
377/*ARGSUSED*/
378static bool_t
379svc_vc_control(xprt, rq, in)
380 SVCXPRT *xprt;
381 const u_int rq;
382 void *in;
383{
384 return (FALSE);
385}
386
387/*
388 * reads data from the tcp or uip connection.
389 * any error is fatal and the connection is closed.
390 * (And a read of zero bytes is a half closed stream => error.)
391 * All read operations timeout after 35 seconds. A timeout is
392 * fatal for the connection.
393 */
394static int
395read_vc(xprtp, buf, len)
396 caddr_t xprtp;
397 caddr_t buf;
398 int len;
399{
400 SVCXPRT *xprt;
401 int sock;
402 int milliseconds = 35 * 1000;
403 struct pollfd pollfd;
404 struct sockaddr *sa;
405 struct cmessage *cm;
406
407 xprt = (SVCXPRT *)(void *)xprtp;
408 assert(xprt != NULL);
409
410 sock = xprt->xp_fd;
411
412 do {
413 pollfd.fd = sock;
414 pollfd.events = POLLIN;
415 pollfd.revents = 0;
416 switch (_poll(&pollfd, 1, milliseconds)) {
417 case -1:
418 if (errno == EINTR)
419 continue;
420 /*FALLTHROUGH*/
421 case 0:
422 goto fatal_err;
423
424 default:
425 break;
426 }
427 } while ((pollfd.revents & POLLIN) == 0);
428
429 cm = NULL;
430 sa = (struct sockaddr *)xprt->xp_rtaddr.buf;
431 if (sa->sa_family == AF_LOCAL) {
432 cm = (struct cmessage *)xprt->xp_verf.oa_base;
433 if ((len = __msgread_withcred(sock, buf, len, cm)) > 0) {
434 xprt->xp_p2 = &cm->cmcred;
435 return (len);
436 } else
437 goto fatal_err;
438 } else {
439 if ((len = _read(sock, buf, (size_t)len)) > 0)
440 return (len);
441 }
442
443fatal_err:
444 ((struct cf_conn *)(xprt->xp_p1))->strm_stat = XPRT_DIED;
445 return (-1);
446}
447
448/*
449 * writes data to the tcp connection.
450 * Any error is fatal and the connection is closed.
451 */
452static int
453write_vc(xprtp, buf, len)
454 caddr_t xprtp;
455 caddr_t buf;
456 int len;
457{
458 SVCXPRT *xprt;
459 int i, cnt;
460 struct sockaddr *sa;
461
462 xprt = (SVCXPRT *)(void *)xprtp;
463 assert(xprt != NULL);
464
465 sa = (struct sockaddr *)xprt->xp_rtaddr.buf;
466 if (sa->sa_family == AF_LOCAL) {
467 for (cnt = len; cnt > 0; cnt -= i, buf += i) {
468 if ((i = __msgwrite(xprt->xp_fd, buf,
469 (size_t)cnt)) < 0) {
470 ((struct cf_conn *)(xprt->xp_p1))->strm_stat =
471 XPRT_DIED;
472 return (-1);
473 }
474 }
475 } else {
476 for (cnt = len; cnt > 0; cnt -= i, buf += i) {
477 if ((i = _write(xprt->xp_fd, buf,
478 (size_t)cnt)) < 0) {
479 ((struct cf_conn *)(xprt->xp_p1))->strm_stat =
480 XPRT_DIED;
481 return (-1);
482 }
483 }
484 }
485
486 return (len);
487}
488
489static enum xprt_stat
490svc_vc_stat(xprt)
491 SVCXPRT *xprt;
492{
493 struct cf_conn *cd;
494
495 assert(xprt != NULL);
496
497 cd = (struct cf_conn *)(xprt->xp_p1);
498
499 if (cd->strm_stat == XPRT_DIED)
500 return (XPRT_DIED);
501 if (! xdrrec_eof(&(cd->xdrs)))
502 return (XPRT_MOREREQS);
503 return (XPRT_IDLE);
504}
505
506static bool_t
507svc_vc_recv(xprt, msg)
508 SVCXPRT *xprt;
509 struct rpc_msg *msg;
510{
511 struct cf_conn *cd;
512 XDR *xdrs;
513
514 assert(xprt != NULL);
515 assert(msg != NULL);
516
517 cd = (struct cf_conn *)(xprt->xp_p1);
518 xdrs = &(cd->xdrs);
519
520 xdrs->x_op = XDR_DECODE;
521 (void)xdrrec_skiprecord(xdrs);
522 if (xdr_callmsg(xdrs, msg)) {
523 cd->x_id = msg->rm_xid;
524 return (TRUE);
525 }
526 cd->strm_stat = XPRT_DIED;
527 return (FALSE);
528}
529
530static bool_t
531svc_vc_getargs(xprt, xdr_args, args_ptr)
532 SVCXPRT *xprt;
533 xdrproc_t xdr_args;
534 caddr_t args_ptr;
535{
536
537 assert(xprt != NULL);
538 /* args_ptr may be NULL */
539 return ((*xdr_args)(&(((struct cf_conn *)(xprt->xp_p1))->xdrs),
540 args_ptr));
541}
542
543static bool_t
544svc_vc_freeargs(xprt, xdr_args, args_ptr)
545 SVCXPRT *xprt;
546 xdrproc_t xdr_args;
547 caddr_t args_ptr;
548{
549 XDR *xdrs;
550
551 assert(xprt != NULL);
552 /* args_ptr may be NULL */
553
554 xdrs = &(((struct cf_conn *)(xprt->xp_p1))->xdrs);
555
556 xdrs->x_op = XDR_FREE;
557 return ((*xdr_args)(xdrs, args_ptr));
558}
559
560static bool_t
561svc_vc_reply(xprt, msg)
562 SVCXPRT *xprt;
563 struct rpc_msg *msg;
564{
565 struct cf_conn *cd;
566 XDR *xdrs;
567 bool_t stat;
568
569 assert(xprt != NULL);
570 assert(msg != NULL);
571
572 cd = (struct cf_conn *)(xprt->xp_p1);
573 xdrs = &(cd->xdrs);
574
575 xdrs->x_op = XDR_ENCODE;
576 msg->rm_xid = cd->x_id;
577 stat = xdr_replymsg(xdrs, msg);
578 (void)xdrrec_endofrecord(xdrs, TRUE);
579 return (stat);
580}
581
582static void
583svc_vc_ops(xprt)
584 SVCXPRT *xprt;
585{
586 static struct xp_ops ops;
587 static struct xp_ops2 ops2;
588 extern mutex_t ops_lock;
589
590/* VARIABLES PROTECTED BY ops_lock: ops, ops2 */
591
592 mutex_lock(&ops_lock);
593 if (ops.xp_recv == NULL) {
594 ops.xp_recv = svc_vc_recv;
595 ops.xp_stat = svc_vc_stat;
596 ops.xp_getargs = svc_vc_getargs;
597 ops.xp_reply = svc_vc_reply;
598 ops.xp_freeargs = svc_vc_freeargs;
599 ops.xp_destroy = svc_vc_destroy;
600 ops2.xp_control = svc_vc_control;
601 }
602 xprt->xp_ops = &ops;
603 xprt->xp_ops2 = &ops2;
604 mutex_unlock(&ops_lock);
605}
606
607static void
608svc_vc_rendezvous_ops(xprt)
609 SVCXPRT *xprt;
610{
611 static struct xp_ops ops;
612 static struct xp_ops2 ops2;
613 extern mutex_t ops_lock;
614
615 mutex_lock(&ops_lock);
616 if (ops.xp_recv == NULL) {
617 ops.xp_recv = rendezvous_request;
618 ops.xp_stat = rendezvous_stat;
619 ops.xp_getargs =
620 (bool_t (*) __P((SVCXPRT *, xdrproc_t, caddr_t)))abort;
621 ops.xp_reply =
622 (bool_t (*) __P((SVCXPRT *, struct rpc_msg *)))abort;
623 ops.xp_freeargs =
624 (bool_t (*) __P((SVCXPRT *, xdrproc_t, caddr_t)))abort,
625 ops.xp_destroy = svc_vc_destroy;
626 ops2.xp_control = svc_vc_control;
627 }
628 xprt->xp_ops = &ops;
629 xprt->xp_ops2 = &ops2;
630 mutex_unlock(&ops_lock);
631}
632
633int
634__msgread_withcred(sock, buf, cnt, cmp)
635 int sock;
636 void *buf;
637 size_t cnt;
638 struct cmessage *cmp;
639{
640 struct iovec iov[1];
641 struct msghdr msg;
642 union {
643 struct cmsghdr cmsg;
644 char control[CMSG_SPACE(sizeof(struct cmsgcred))];
645 } cm;
646 int ret;
647
648
649 bzero(&cm, sizeof(cm));
650 iov[0].iov_base = buf;
651 iov[0].iov_len = cnt;
652
653 msg.msg_iov = iov;
654 msg.msg_iovlen = 1;
655 msg.msg_name = NULL;
656 msg.msg_namelen = 0;
657 msg.msg_control = &cm;
658 msg.msg_controllen = CMSG_SPACE(sizeof(struct cmsgcred));
659 msg.msg_flags = 0;
660
661 ret = _recvmsg(sock, &msg, 0);
662 bcopy(&cm.cmsg, &cmp->cmsg, sizeof(cmp->cmsg));
663 bcopy(CMSG_DATA(&cm), &cmp->cmcred, sizeof(cmp->cmcred));
664
665 if (msg.msg_controllen == 0 ||
666 (msg.msg_flags & MSG_CTRUNC) != 0)
667 return (-1);
668
669 return (ret);
670}
671
672static int
673__msgwrite(sock, buf, cnt)
674 int sock;
675 void *buf;
676 size_t cnt;
677{
678 struct iovec iov[1];
679 struct msghdr msg;
680 struct cmessage cm;
681
682 bzero((char *)&cm, sizeof(cm));
683 iov[0].iov_base = buf;
684 iov[0].iov_len = cnt;
685
686 cm.cmsg.cmsg_type = SCM_CREDS;
687 cm.cmsg.cmsg_level = SOL_SOCKET;
688 cm.cmsg.cmsg_len = sizeof(struct cmessage);
689
690 msg.msg_iov = iov;
691 msg.msg_iovlen = 1;
692 msg.msg_name = NULL;
693 msg.msg_namelen = 0;
694 msg.msg_control = (caddr_t)&cm;
695 msg.msg_controllen = sizeof(struct cmessage);
696 msg.msg_flags = 0;
697
698 return(_sendmsg(sock, &msg, 0));
699}
700
701/*
702 * Get the effective UID of the sending process. Used by rpcbind and keyserv
703 * (AF_LOCAL).
704 */
705int
706__rpc_get_local_uid(SVCXPRT *transp, uid_t *uid)
707{
708 struct cmsgcred *cmcred;
709 struct cmessage *cm;
710 struct cmsghdr *cmp;
711
712 cm = (struct cmessage *)transp->xp_verf.oa_base;
713
714 if (cm == NULL)
715 return (-1);
716 cmp = &cm->cmsg;
717 if (cmp == NULL || cmp->cmsg_level != SOL_SOCKET ||
718 cmp->cmsg_type != SCM_CREDS)
719 return (-1);
720
721 cmcred = __svc_getcallercreds(transp);
722 if (cmcred == NULL)
723 return (-1);
724 *uid = cmcred->cmcred_euid;
725 return (0);
726}
2/* $FreeBSD: head/lib/libc/rpc/svc_vc.c 90272 2002-02-05 23:46:37Z alfred $ */
3
4/*
5 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
6 * unrestricted use provided that this legend is included on all tape
7 * media and as a part of the software program in whole or part. Users
8 * may copy or modify Sun RPC without charge, but are not authorized
9 * to license or distribute it to anyone else except as part of a product or
10 * program developed by the user.
11 *
12 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
13 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
14 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
15 *
16 * Sun RPC is provided with no support and without any obligation on the
17 * part of Sun Microsystems, Inc. to assist in its use, correction,
18 * modification or enhancement.
19 *
20 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
21 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
22 * OR ANY PART THEREOF.
23 *
24 * In no event will Sun Microsystems, Inc. be liable for any lost revenue
25 * or profits or other special, indirect and consequential damages, even if
26 * Sun has been advised of the possibility of such damages.
27 *
28 * Sun Microsystems, Inc.
29 * 2550 Garcia Avenue
30 * Mountain View, California 94043
31 */
32
33#include <sys/cdefs.h>
34#if defined(LIBC_SCCS) && !defined(lint)
35static char *sccsid = "@(#)svc_tcp.c 1.21 87/08/11 Copyr 1984 Sun Micro";
36static char *sccsid = "@(#)svc_tcp.c 2.2 88/08/01 4.0 RPCSRC";
37#endif
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/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 <stdio.h>
62#include <stdlib.h>
63#include <string.h>
64#include <unistd.h>
65
66#include <rpc/rpc.h>
67
68#include "rpc_com.h"
69#include "un-namespace.h"
70
71struct cmessage {
72 struct cmsghdr cmsg;
73 struct cmsgcred cmcred;
74};
75
76static SVCXPRT *makefd_xprt __P((int, u_int, u_int));
77static bool_t rendezvous_request __P((SVCXPRT *, struct rpc_msg *));
78static enum xprt_stat rendezvous_stat __P((SVCXPRT *));
79static void svc_vc_destroy __P((SVCXPRT *));
80static int read_vc __P((caddr_t, caddr_t, int));
81static int write_vc __P((caddr_t, caddr_t, int));
82static enum xprt_stat svc_vc_stat __P((SVCXPRT *));
83static bool_t svc_vc_recv __P((SVCXPRT *, struct rpc_msg *));
84static bool_t svc_vc_getargs __P((SVCXPRT *, xdrproc_t, caddr_t));
85static bool_t svc_vc_freeargs __P((SVCXPRT *, xdrproc_t, caddr_t));
86static bool_t svc_vc_reply __P((SVCXPRT *, struct rpc_msg *));
87static void svc_vc_rendezvous_ops __P((SVCXPRT *));
88static void svc_vc_ops __P((SVCXPRT *));
89static bool_t svc_vc_control __P((SVCXPRT *xprt, const u_int rq, void *in));
90static int __msgread_withcred(int, void *, size_t, struct cmessage *);
91static int __msgwrite(int, void *, size_t);
92
93struct cf_rendezvous { /* kept in xprt->xp_p1 for rendezvouser */
94 u_int sendsize;
95 u_int recvsize;
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};
104
105/*
106 * Usage:
107 * xprt = svc_vc_create(sock, send_buf_size, recv_buf_size);
108 *
109 * Creates, registers, and returns a (rpc) tcp based transporter.
110 * Once *xprt is initialized, it is registered as a transporter
111 * see (svc.h, xprt_register). This routine returns
112 * a NULL if a problem occurred.
113 *
114 * The filedescriptor passed in is expected to refer to a bound, but
115 * not yet connected socket.
116 *
117 * Since streams do buffered io similar to stdio, the caller can specify
118 * how big the send and receive buffers are via the second and third parms;
119 * 0 => use the system default.
120 */
121SVCXPRT *
122svc_vc_create(fd, sendsize, recvsize)
123 int fd;
124 u_int sendsize;
125 u_int recvsize;
126{
127 SVCXPRT *xprt;
128 struct cf_rendezvous *r = NULL;
129 struct __rpc_sockinfo si;
130 struct sockaddr_storage sslocal;
131 socklen_t slen;
132
133 r = mem_alloc(sizeof(*r));
134 if (r == NULL) {
135 warnx("svc_vc_create: out of memory");
136 goto cleanup_svc_vc_create;
137 }
138 if (!__rpc_fd2sockinfo(fd, &si))
139 return NULL;
140 r->sendsize = __rpc_get_t_size(si.si_af, si.si_proto, (int)sendsize);
141 r->recvsize = __rpc_get_t_size(si.si_af, si.si_proto, (int)recvsize);
142 xprt = mem_alloc(sizeof(SVCXPRT));
143 if (xprt == NULL) {
144 warnx("svc_vc_create: out of memory");
145 goto cleanup_svc_vc_create;
146 }
147 xprt->xp_tp = NULL;
148 xprt->xp_p1 = (caddr_t)(void *)r;
149 xprt->xp_p2 = NULL;
150 xprt->xp_p3 = NULL;
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);
173cleanup_svc_vc_create:
174 if (r != NULL)
175 mem_free(r, sizeof(*r));
176 return (NULL);
177}
178
179/*
180 * Like svtcp_create(), except the routine takes any *open* UNIX file
181 * descriptor as its first input.
182 */
183SVCXPRT *
184svc_fd_create(fd, sendsize, recvsize)
185 int fd;
186 u_int sendsize;
187 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
233freedata:
234 if (ret->xp_ltaddr.buf != NULL)
235 mem_free(ret->xp_ltaddr.buf, rep->xp_ltaddr.maxlen);
236
237 return NULL;
238}
239
240static SVCXPRT *
241makefd_xprt(fd, sendsize, recvsize)
242 int fd;
243 u_int sendsize;
244 u_int recvsize;
245{
246 SVCXPRT *xprt;
247 struct cf_conn *cd;
248 const char *netid;
249 struct __rpc_sockinfo si;
250
251 assert(fd != -1);
252
253 xprt = mem_alloc(sizeof(SVCXPRT));
254 if (xprt == NULL) {
255 warnx("svc_vc: makefd_xprt: out of memory");
256 goto done;
257 }
258 memset(xprt, 0, sizeof *xprt);
259 cd = mem_alloc(sizeof(struct cf_conn));
260 if (cd == NULL) {
261 warnx("svc_tcp: makefd_xprt: out of memory");
262 mem_free(xprt, sizeof(SVCXPRT));
263 xprt = NULL;
264 goto done;
265 }
266 cd->strm_stat = XPRT_IDLE;
267 xdrrec_create(&(cd->xdrs), sendsize, recvsize,
268 (caddr_t)(void *)xprt, read_vc, write_vc);
269 xprt->xp_p1 = (caddr_t)(void *)cd;
270 xprt->xp_verf.oa_base = cd->verf_body;
271 svc_vc_ops(xprt); /* truely deals with calls */
272 xprt->xp_port = 0; /* this is a connection, not a rendezvouser */
273 xprt->xp_fd = fd;
274 if (__rpc_fd2sockinfo(fd, &si) && __rpc_sockinfo2netid(&si, &netid))
275 xprt->xp_netid = strdup(netid);
276
277 xprt_register(xprt);
278done:
279 return (xprt);
280}
281
282/*ARGSUSED*/
283static bool_t
284rendezvous_request(xprt, msg)
285 SVCXPRT *xprt;
286 struct rpc_msg *msg;
287{
288 int sock;
289 struct cf_rendezvous *r;
290 struct sockaddr_storage addr;
291 socklen_t len;
292 struct __rpc_sockinfo si;
293
294 assert(xprt != NULL);
295 assert(msg != NULL);
296
297 r = (struct cf_rendezvous *)xprt->xp_p1;
298again:
299 len = sizeof addr;
300 if ((sock = _accept(xprt->xp_fd, (struct sockaddr *)(void *)&addr,
301 &len)) < 0) {
302 if (errno == EINTR)
303 goto again;
304 return (FALSE);
305 }
306 /*
307 * make a new transporter (re-uses xprt)
308 */
309 xprt = makefd_xprt(sock, r->sendsize, r->recvsize);
310 xprt->xp_rtaddr.buf = mem_alloc(len);
311 if (xprt->xp_rtaddr.buf == NULL)
312 return (FALSE);
313 memcpy(xprt->xp_rtaddr.buf, &addr, len);
314 xprt->xp_rtaddr.len = len;
315 if (addr.ss_family == AF_LOCAL) {
316 xprt->xp_raddr = *(struct sockaddr_in *)xprt->xp_rtaddr.buf;
317 xprt->xp_addrlen = sizeof (struct sockaddr_in);
318 }
319#ifdef PORTMAP
320 if (addr.ss_family == AF_INET) {
321 xprt->xp_raddr = *(struct sockaddr_in *)xprt->xp_rtaddr.buf;
322 xprt->xp_addrlen = sizeof (struct sockaddr_in);
323 }
324#endif /* PORTMAP */
325 if (__rpc_fd2sockinfo(sock, &si) && si.si_proto == IPPROTO_TCP) {
326 len = 1;
327 /* XXX fvdl - is this useful? */
328 _setsockopt(sock, IPPROTO_TCP, TCP_NODELAY, &len, sizeof (len));
329 }
330 return (FALSE); /* there is never an rpc msg to be processed */
331}
332
333/*ARGSUSED*/
334static enum xprt_stat
335rendezvous_stat(xprt)
336 SVCXPRT *xprt;
337{
338
339 return (XPRT_IDLE);
340}
341
342static void
343svc_vc_destroy(xprt)
344 SVCXPRT *xprt;
345{
346 struct cf_conn *cd;
347 struct cf_rendezvous *r;
348
349 assert(xprt != NULL);
350
351 cd = (struct cf_conn *)xprt->xp_p1;
352
353 xprt_unregister(xprt);
354 if (xprt->xp_fd != RPC_ANYFD)
355 (void)_close(xprt->xp_fd);
356 if (xprt->xp_port != 0) {
357 /* a rendezvouser socket */
358 r = (struct cf_rendezvous *)xprt->xp_p1;
359 mem_free(r, sizeof (struct cf_rendezvous));
360 xprt->xp_port = 0;
361 } else {
362 /* an actual connection socket */
363 XDR_DESTROY(&(cd->xdrs));
364 mem_free(cd, sizeof(struct cf_conn));
365 }
366 if (xprt->xp_rtaddr.buf)
367 mem_free(xprt->xp_rtaddr.buf, xprt->xp_rtaddr.maxlen);
368 if (xprt->xp_ltaddr.buf)
369 mem_free(xprt->xp_ltaddr.buf, xprt->xp_ltaddr.maxlen);
370 if (xprt->xp_tp)
371 free(xprt->xp_tp);
372 if (xprt->xp_netid)
373 free(xprt->xp_netid);
374 mem_free(xprt, sizeof(SVCXPRT));
375}
376
377/*ARGSUSED*/
378static bool_t
379svc_vc_control(xprt, rq, in)
380 SVCXPRT *xprt;
381 const u_int rq;
382 void *in;
383{
384 return (FALSE);
385}
386
387/*
388 * reads data from the tcp or uip connection.
389 * any error is fatal and the connection is closed.
390 * (And a read of zero bytes is a half closed stream => error.)
391 * All read operations timeout after 35 seconds. A timeout is
392 * fatal for the connection.
393 */
394static int
395read_vc(xprtp, buf, len)
396 caddr_t xprtp;
397 caddr_t buf;
398 int len;
399{
400 SVCXPRT *xprt;
401 int sock;
402 int milliseconds = 35 * 1000;
403 struct pollfd pollfd;
404 struct sockaddr *sa;
405 struct cmessage *cm;
406
407 xprt = (SVCXPRT *)(void *)xprtp;
408 assert(xprt != NULL);
409
410 sock = xprt->xp_fd;
411
412 do {
413 pollfd.fd = sock;
414 pollfd.events = POLLIN;
415 pollfd.revents = 0;
416 switch (_poll(&pollfd, 1, milliseconds)) {
417 case -1:
418 if (errno == EINTR)
419 continue;
420 /*FALLTHROUGH*/
421 case 0:
422 goto fatal_err;
423
424 default:
425 break;
426 }
427 } while ((pollfd.revents & POLLIN) == 0);
428
429 cm = NULL;
430 sa = (struct sockaddr *)xprt->xp_rtaddr.buf;
431 if (sa->sa_family == AF_LOCAL) {
432 cm = (struct cmessage *)xprt->xp_verf.oa_base;
433 if ((len = __msgread_withcred(sock, buf, len, cm)) > 0) {
434 xprt->xp_p2 = &cm->cmcred;
435 return (len);
436 } else
437 goto fatal_err;
438 } else {
439 if ((len = _read(sock, buf, (size_t)len)) > 0)
440 return (len);
441 }
442
443fatal_err:
444 ((struct cf_conn *)(xprt->xp_p1))->strm_stat = XPRT_DIED;
445 return (-1);
446}
447
448/*
449 * writes data to the tcp connection.
450 * Any error is fatal and the connection is closed.
451 */
452static int
453write_vc(xprtp, buf, len)
454 caddr_t xprtp;
455 caddr_t buf;
456 int len;
457{
458 SVCXPRT *xprt;
459 int i, cnt;
460 struct sockaddr *sa;
461
462 xprt = (SVCXPRT *)(void *)xprtp;
463 assert(xprt != NULL);
464
465 sa = (struct sockaddr *)xprt->xp_rtaddr.buf;
466 if (sa->sa_family == AF_LOCAL) {
467 for (cnt = len; cnt > 0; cnt -= i, buf += i) {
468 if ((i = __msgwrite(xprt->xp_fd, buf,
469 (size_t)cnt)) < 0) {
470 ((struct cf_conn *)(xprt->xp_p1))->strm_stat =
471 XPRT_DIED;
472 return (-1);
473 }
474 }
475 } else {
476 for (cnt = len; cnt > 0; cnt -= i, buf += i) {
477 if ((i = _write(xprt->xp_fd, buf,
478 (size_t)cnt)) < 0) {
479 ((struct cf_conn *)(xprt->xp_p1))->strm_stat =
480 XPRT_DIED;
481 return (-1);
482 }
483 }
484 }
485
486 return (len);
487}
488
489static enum xprt_stat
490svc_vc_stat(xprt)
491 SVCXPRT *xprt;
492{
493 struct cf_conn *cd;
494
495 assert(xprt != NULL);
496
497 cd = (struct cf_conn *)(xprt->xp_p1);
498
499 if (cd->strm_stat == XPRT_DIED)
500 return (XPRT_DIED);
501 if (! xdrrec_eof(&(cd->xdrs)))
502 return (XPRT_MOREREQS);
503 return (XPRT_IDLE);
504}
505
506static bool_t
507svc_vc_recv(xprt, msg)
508 SVCXPRT *xprt;
509 struct rpc_msg *msg;
510{
511 struct cf_conn *cd;
512 XDR *xdrs;
513
514 assert(xprt != NULL);
515 assert(msg != NULL);
516
517 cd = (struct cf_conn *)(xprt->xp_p1);
518 xdrs = &(cd->xdrs);
519
520 xdrs->x_op = XDR_DECODE;
521 (void)xdrrec_skiprecord(xdrs);
522 if (xdr_callmsg(xdrs, msg)) {
523 cd->x_id = msg->rm_xid;
524 return (TRUE);
525 }
526 cd->strm_stat = XPRT_DIED;
527 return (FALSE);
528}
529
530static bool_t
531svc_vc_getargs(xprt, xdr_args, args_ptr)
532 SVCXPRT *xprt;
533 xdrproc_t xdr_args;
534 caddr_t args_ptr;
535{
536
537 assert(xprt != NULL);
538 /* args_ptr may be NULL */
539 return ((*xdr_args)(&(((struct cf_conn *)(xprt->xp_p1))->xdrs),
540 args_ptr));
541}
542
543static bool_t
544svc_vc_freeargs(xprt, xdr_args, args_ptr)
545 SVCXPRT *xprt;
546 xdrproc_t xdr_args;
547 caddr_t args_ptr;
548{
549 XDR *xdrs;
550
551 assert(xprt != NULL);
552 /* args_ptr may be NULL */
553
554 xdrs = &(((struct cf_conn *)(xprt->xp_p1))->xdrs);
555
556 xdrs->x_op = XDR_FREE;
557 return ((*xdr_args)(xdrs, args_ptr));
558}
559
560static bool_t
561svc_vc_reply(xprt, msg)
562 SVCXPRT *xprt;
563 struct rpc_msg *msg;
564{
565 struct cf_conn *cd;
566 XDR *xdrs;
567 bool_t stat;
568
569 assert(xprt != NULL);
570 assert(msg != NULL);
571
572 cd = (struct cf_conn *)(xprt->xp_p1);
573 xdrs = &(cd->xdrs);
574
575 xdrs->x_op = XDR_ENCODE;
576 msg->rm_xid = cd->x_id;
577 stat = xdr_replymsg(xdrs, msg);
578 (void)xdrrec_endofrecord(xdrs, TRUE);
579 return (stat);
580}
581
582static void
583svc_vc_ops(xprt)
584 SVCXPRT *xprt;
585{
586 static struct xp_ops ops;
587 static struct xp_ops2 ops2;
588 extern mutex_t ops_lock;
589
590/* VARIABLES PROTECTED BY ops_lock: ops, ops2 */
591
592 mutex_lock(&ops_lock);
593 if (ops.xp_recv == NULL) {
594 ops.xp_recv = svc_vc_recv;
595 ops.xp_stat = svc_vc_stat;
596 ops.xp_getargs = svc_vc_getargs;
597 ops.xp_reply = svc_vc_reply;
598 ops.xp_freeargs = svc_vc_freeargs;
599 ops.xp_destroy = svc_vc_destroy;
600 ops2.xp_control = svc_vc_control;
601 }
602 xprt->xp_ops = &ops;
603 xprt->xp_ops2 = &ops2;
604 mutex_unlock(&ops_lock);
605}
606
607static void
608svc_vc_rendezvous_ops(xprt)
609 SVCXPRT *xprt;
610{
611 static struct xp_ops ops;
612 static struct xp_ops2 ops2;
613 extern mutex_t ops_lock;
614
615 mutex_lock(&ops_lock);
616 if (ops.xp_recv == NULL) {
617 ops.xp_recv = rendezvous_request;
618 ops.xp_stat = rendezvous_stat;
619 ops.xp_getargs =
620 (bool_t (*) __P((SVCXPRT *, xdrproc_t, caddr_t)))abort;
621 ops.xp_reply =
622 (bool_t (*) __P((SVCXPRT *, struct rpc_msg *)))abort;
623 ops.xp_freeargs =
624 (bool_t (*) __P((SVCXPRT *, xdrproc_t, caddr_t)))abort,
625 ops.xp_destroy = svc_vc_destroy;
626 ops2.xp_control = svc_vc_control;
627 }
628 xprt->xp_ops = &ops;
629 xprt->xp_ops2 = &ops2;
630 mutex_unlock(&ops_lock);
631}
632
633int
634__msgread_withcred(sock, buf, cnt, cmp)
635 int sock;
636 void *buf;
637 size_t cnt;
638 struct cmessage *cmp;
639{
640 struct iovec iov[1];
641 struct msghdr msg;
642 union {
643 struct cmsghdr cmsg;
644 char control[CMSG_SPACE(sizeof(struct cmsgcred))];
645 } cm;
646 int ret;
647
648
649 bzero(&cm, sizeof(cm));
650 iov[0].iov_base = buf;
651 iov[0].iov_len = cnt;
652
653 msg.msg_iov = iov;
654 msg.msg_iovlen = 1;
655 msg.msg_name = NULL;
656 msg.msg_namelen = 0;
657 msg.msg_control = &cm;
658 msg.msg_controllen = CMSG_SPACE(sizeof(struct cmsgcred));
659 msg.msg_flags = 0;
660
661 ret = _recvmsg(sock, &msg, 0);
662 bcopy(&cm.cmsg, &cmp->cmsg, sizeof(cmp->cmsg));
663 bcopy(CMSG_DATA(&cm), &cmp->cmcred, sizeof(cmp->cmcred));
664
665 if (msg.msg_controllen == 0 ||
666 (msg.msg_flags & MSG_CTRUNC) != 0)
667 return (-1);
668
669 return (ret);
670}
671
672static int
673__msgwrite(sock, buf, cnt)
674 int sock;
675 void *buf;
676 size_t cnt;
677{
678 struct iovec iov[1];
679 struct msghdr msg;
680 struct cmessage cm;
681
682 bzero((char *)&cm, sizeof(cm));
683 iov[0].iov_base = buf;
684 iov[0].iov_len = cnt;
685
686 cm.cmsg.cmsg_type = SCM_CREDS;
687 cm.cmsg.cmsg_level = SOL_SOCKET;
688 cm.cmsg.cmsg_len = sizeof(struct cmessage);
689
690 msg.msg_iov = iov;
691 msg.msg_iovlen = 1;
692 msg.msg_name = NULL;
693 msg.msg_namelen = 0;
694 msg.msg_control = (caddr_t)&cm;
695 msg.msg_controllen = sizeof(struct cmessage);
696 msg.msg_flags = 0;
697
698 return(_sendmsg(sock, &msg, 0));
699}
700
701/*
702 * Get the effective UID of the sending process. Used by rpcbind and keyserv
703 * (AF_LOCAL).
704 */
705int
706__rpc_get_local_uid(SVCXPRT *transp, uid_t *uid)
707{
708 struct cmsgcred *cmcred;
709 struct cmessage *cm;
710 struct cmsghdr *cmp;
711
712 cm = (struct cmessage *)transp->xp_verf.oa_base;
713
714 if (cm == NULL)
715 return (-1);
716 cmp = &cm->cmsg;
717 if (cmp == NULL || cmp->cmsg_level != SOL_SOCKET ||
718 cmp->cmsg_type != SCM_CREDS)
719 return (-1);
720
721 cmcred = __svc_getcallercreds(transp);
722 if (cmcred == NULL)
723 return (-1);
724 *uid = cmcred->cmcred_euid;
725 return (0);
726}