1 /* $NetBSD: svc_vc.c,v 1.7 2000/08/03 00:01:53 fvdl Exp $ */
4 * SPDX-License-Identifier: BSD-3-Clause
6 * Copyright (c) 2009, Sun Microsystems, Inc.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions are met:
11 * - Redistributions of source code must retain the above copyright notice,
12 * this list of conditions and the following disclaimer.
13 * - Redistributions in binary form must reproduce the above copyright notice,
14 * this list of conditions and the following disclaimer in the documentation
15 * and/or other materials provided with the distribution.
16 * - Neither the name of Sun Microsystems, Inc. nor the names of its
17 * contributors may be used to endorse or promote products derived
18 * from this software without specific prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
21 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
24 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30 * POSSIBILITY OF SUCH DAMAGE.
33 #if defined(LIBC_SCCS) && !defined(lint)
34 static char *sccsid2 = "@(#)svc_tcp.c 1.21 87/08/11 Copyr 1984 Sun Micro";
35 static char *sccsid = "@(#)svc_tcp.c 2.2 88/08/01 4.0 RPCSRC";
37 #include <sys/cdefs.h>
38 __FBSDID("$FreeBSD$");
41 * svc_vc.c, Server side for Connection Oriented based RPC.
43 * Actually implements two flavors of transporter -
44 * a tcp rendezvouser (a listner and connection establisher)
45 * and a record/tcp stream.
48 #include "opt_kern_tls.h"
50 #include <sys/param.h>
51 #include <sys/limits.h>
53 #include <sys/kernel.h>
55 #include <sys/malloc.h>
57 #include <sys/mutex.h>
59 #include <sys/protosw.h>
60 #include <sys/queue.h>
61 #include <sys/socket.h>
62 #include <sys/socketvar.h>
64 #include <sys/systm.h>
69 #include <netinet/tcp.h>
72 #include <rpc/rpcsec_tls.h>
75 #include <rpc/rpc_com.h>
77 #include <security/mac/mac_framework.h>
79 static bool_t svc_vc_rendezvous_recv(SVCXPRT *, struct rpc_msg *,
80 struct sockaddr **, struct mbuf **);
81 static enum xprt_stat svc_vc_rendezvous_stat(SVCXPRT *);
82 static void svc_vc_rendezvous_destroy(SVCXPRT *);
83 static bool_t svc_vc_null(void);
84 static void svc_vc_destroy(SVCXPRT *);
85 static enum xprt_stat svc_vc_stat(SVCXPRT *);
86 static bool_t svc_vc_ack(SVCXPRT *, uint32_t *);
87 static bool_t svc_vc_recv(SVCXPRT *, struct rpc_msg *,
88 struct sockaddr **, struct mbuf **);
89 static bool_t svc_vc_reply(SVCXPRT *, struct rpc_msg *,
90 struct sockaddr *, struct mbuf *, uint32_t *seq);
91 static bool_t svc_vc_control(SVCXPRT *xprt, const u_int rq, void *in);
92 static bool_t svc_vc_rendezvous_control (SVCXPRT *xprt, const u_int rq,
94 static void svc_vc_backchannel_destroy(SVCXPRT *);
95 static enum xprt_stat svc_vc_backchannel_stat(SVCXPRT *);
96 static bool_t svc_vc_backchannel_recv(SVCXPRT *, struct rpc_msg *,
97 struct sockaddr **, struct mbuf **);
98 static bool_t svc_vc_backchannel_reply(SVCXPRT *, struct rpc_msg *,
99 struct sockaddr *, struct mbuf *, uint32_t *);
100 static bool_t svc_vc_backchannel_control(SVCXPRT *xprt, const u_int rq,
102 static SVCXPRT *svc_vc_create_conn(SVCPOOL *pool, struct socket *so,
103 struct sockaddr *raddr);
104 static int svc_vc_accept(struct socket *head, struct socket **sop);
105 static int svc_vc_soupcall(struct socket *so, void *arg, int waitflag);
106 static int svc_vc_rendezvous_soupcall(struct socket *, void *, int);
108 static struct xp_ops svc_vc_rendezvous_ops = {
109 .xp_recv = svc_vc_rendezvous_recv,
110 .xp_stat = svc_vc_rendezvous_stat,
111 .xp_reply = (bool_t (*)(SVCXPRT *, struct rpc_msg *,
112 struct sockaddr *, struct mbuf *, uint32_t *))svc_vc_null,
113 .xp_destroy = svc_vc_rendezvous_destroy,
114 .xp_control = svc_vc_rendezvous_control
117 static struct xp_ops svc_vc_ops = {
118 .xp_recv = svc_vc_recv,
119 .xp_stat = svc_vc_stat,
120 .xp_ack = svc_vc_ack,
121 .xp_reply = svc_vc_reply,
122 .xp_destroy = svc_vc_destroy,
123 .xp_control = svc_vc_control
126 static struct xp_ops svc_vc_backchannel_ops = {
127 .xp_recv = svc_vc_backchannel_recv,
128 .xp_stat = svc_vc_backchannel_stat,
129 .xp_reply = svc_vc_backchannel_reply,
130 .xp_destroy = svc_vc_backchannel_destroy,
131 .xp_control = svc_vc_backchannel_control
136 * xprt = svc_vc_create(sock, send_buf_size, recv_buf_size);
138 * Creates, registers, and returns a (rpc) tcp based transporter.
139 * Once *xprt is initialized, it is registered as a transporter
140 * see (svc.h, xprt_register). This routine returns
141 * a NULL if a problem occurred.
143 * The filedescriptor passed in is expected to refer to a bound, but
144 * not yet connected socket.
146 * Since streams do buffered io similar to stdio, the caller can specify
147 * how big the send and receive buffers are via the second and third parms;
148 * 0 => use the system default.
151 svc_vc_create(SVCPOOL *pool, struct socket *so, size_t sendsize,
159 if (so->so_state & (SS_ISCONNECTED|SS_ISDISCONNECTED)) {
161 CURVNET_SET(so->so_vnet);
162 error = so->so_proto->pr_usrreqs->pru_peeraddr(so, &sa);
166 xprt = svc_vc_create_conn(pool, so, sa);
172 xprt = svc_xprt_alloc();
173 sx_init(&xprt->xp_lock, "xprt->xp_lock");
174 xprt->xp_pool = pool;
175 xprt->xp_socket = so;
178 xprt->xp_ops = &svc_vc_rendezvous_ops;
180 CURVNET_SET(so->so_vnet);
181 error = so->so_proto->pr_usrreqs->pru_sockaddr(so, &sa);
184 goto cleanup_svc_vc_create;
187 memcpy(&xprt->xp_ltaddr, sa, sa->sa_len);
192 solisten(so, -1, curthread);
195 xprt->xp_upcallset = 1;
196 solisten_upcall_set(so, svc_vc_rendezvous_soupcall, xprt);
201 cleanup_svc_vc_create:
202 sx_destroy(&xprt->xp_lock);
209 * Create a new transport for a socket optained via soaccept().
212 svc_vc_create_conn(SVCPOOL *pool, struct socket *so, struct sockaddr *raddr)
216 struct sockaddr* sa = NULL;
221 bzero(&opt, sizeof(struct sockopt));
222 opt.sopt_dir = SOPT_SET;
223 opt.sopt_level = SOL_SOCKET;
224 opt.sopt_name = SO_KEEPALIVE;
226 opt.sopt_valsize = sizeof(one);
227 error = sosetopt(so, &opt);
232 if (so->so_proto->pr_protocol == IPPROTO_TCP) {
233 bzero(&opt, sizeof(struct sockopt));
234 opt.sopt_dir = SOPT_SET;
235 opt.sopt_level = IPPROTO_TCP;
236 opt.sopt_name = TCP_NODELAY;
238 opt.sopt_valsize = sizeof(one);
239 error = sosetopt(so, &opt);
245 cd = mem_alloc(sizeof(*cd));
246 cd->strm_stat = XPRT_IDLE;
248 xprt = svc_xprt_alloc();
249 sx_init(&xprt->xp_lock, "xprt->xp_lock");
250 xprt->xp_pool = pool;
251 xprt->xp_socket = so;
254 xprt->xp_ops = &svc_vc_ops;
257 * See http://www.connectathon.org/talks96/nfstcp.pdf - client
258 * has a 5 minute timer, server has a 6 minute timer.
260 xprt->xp_idletimeout = 6 * 60;
262 memcpy(&xprt->xp_rtaddr, raddr, raddr->sa_len);
264 CURVNET_SET(so->so_vnet);
265 error = so->so_proto->pr_usrreqs->pru_sockaddr(so, &sa);
268 goto cleanup_svc_vc_create;
270 memcpy(&xprt->xp_ltaddr, sa, sa->sa_len);
275 SOCKBUF_LOCK(&so->so_rcv);
276 xprt->xp_upcallset = 1;
277 soupcall_set(so, SO_RCV, svc_vc_soupcall, xprt);
278 SOCKBUF_UNLOCK(&so->so_rcv);
281 * Throw the transport into the active list in case it already
282 * has some data buffered.
284 sx_xlock(&xprt->xp_lock);
286 sx_xunlock(&xprt->xp_lock);
289 cleanup_svc_vc_create:
290 sx_destroy(&xprt->xp_lock);
292 mem_free(cd, sizeof(*cd));
298 * Create a new transport for a backchannel on a clnt_vc socket.
301 svc_vc_create_backchannel(SVCPOOL *pool)
303 SVCXPRT *xprt = NULL;
304 struct cf_conn *cd = NULL;
306 cd = mem_alloc(sizeof(*cd));
307 cd->strm_stat = XPRT_IDLE;
309 xprt = svc_xprt_alloc();
310 sx_init(&xprt->xp_lock, "xprt->xp_lock");
311 xprt->xp_pool = pool;
312 xprt->xp_socket = NULL;
315 xprt->xp_ops = &svc_vc_backchannel_ops;
320 * This does all of the accept except the final call to soaccept. The
321 * caller will call soaccept after dropping its locks (soaccept may
325 svc_vc_accept(struct socket *head, struct socket **sop)
331 /* XXXGL: shouldn't that be an assertion? */
332 if (!SOLISTENING(head)) {
337 error = mac_socket_check_accept(curthread->td_ucred, head);
342 * XXXGL: we want non-blocking semantics. The socket could be a
343 * socket created by kernel as well as socket shared with userland,
344 * so we can't be sure about presense of SS_NBIO. We also shall not
345 * toggle it on the socket, since that may surprise userland. So we
346 * set SS_NBIO only temporarily.
349 nbio = head->so_state & SS_NBIO;
350 head->so_state |= SS_NBIO;
351 error = solisten_dequeue(head, &so, 0);
352 head->so_state &= (nbio & ~SS_NBIO);
356 so->so_state |= nbio;
359 /* connection has been removed from the listen queue */
360 KNOTE_UNLOCKED(&head->so_rdsel.si_note, 0);
367 svc_vc_rendezvous_recv(SVCXPRT *xprt, struct rpc_msg *msg,
368 struct sockaddr **addrp, struct mbuf **mp)
370 struct socket *so = NULL;
371 struct sockaddr *sa = NULL;
376 * The socket upcall calls xprt_active() which will eventually
377 * cause the server to call us here. We attempt to accept a
378 * connection from the socket and turn it into a new
379 * transport. If the accept fails, we have drained all pending
380 * connections so we call xprt_inactive().
382 sx_xlock(&xprt->xp_lock);
384 error = svc_vc_accept(xprt->xp_socket, &so);
386 if (error == EWOULDBLOCK) {
388 * We must re-test for new connections after taking
389 * the lock to protect us in the case where a new
390 * connection arrives after our call to accept fails
393 SOLISTEN_LOCK(xprt->xp_socket);
394 if (TAILQ_EMPTY(&xprt->xp_socket->sol_comp))
395 xprt_inactive_self(xprt);
396 SOLISTEN_UNLOCK(xprt->xp_socket);
397 sx_xunlock(&xprt->xp_lock);
402 SOLISTEN_LOCK(xprt->xp_socket);
403 if (xprt->xp_upcallset) {
404 xprt->xp_upcallset = 0;
405 soupcall_clear(xprt->xp_socket, SO_RCV);
407 SOLISTEN_UNLOCK(xprt->xp_socket);
408 xprt_inactive_self(xprt);
409 sx_xunlock(&xprt->xp_lock);
413 sx_xunlock(&xprt->xp_lock);
416 error = soaccept(so, &sa);
420 * XXX not sure if I need to call sofree or soclose here.
428 * svc_vc_create_conn will call xprt_register - we don't need
429 * to do anything with the new connection except derefence it.
431 new_xprt = svc_vc_create_conn(xprt->xp_pool, so, sa);
435 SVC_RELEASE(new_xprt);
440 return (FALSE); /* there is never an rpc msg to be processed */
444 static enum xprt_stat
445 svc_vc_rendezvous_stat(SVCXPRT *xprt)
452 svc_vc_destroy_common(SVCXPRT *xprt)
457 if (xprt->xp_socket) {
458 if ((xprt->xp_tls & (RPCTLS_FLAGS_HANDSHAKE |
459 RPCTLS_FLAGS_HANDSHFAIL)) != 0) {
460 if ((xprt->xp_tls & RPCTLS_FLAGS_HANDSHAKE) != 0) {
462 * If the upcall fails, the socket has
463 * probably been closed via the rpctlssd
464 * daemon having crashed or been
465 * restarted, so just ignore returned stat.
467 stat = rpctls_srv_disconnect(xprt->xp_sslsec,
468 xprt->xp_sslusec, xprt->xp_sslrefno,
471 /* Must sorele() to get rid of reference. */
472 CURVNET_SET(xprt->xp_socket->so_vnet);
473 SOCK_LOCK(xprt->xp_socket);
474 sorele(xprt->xp_socket);
477 (void)soclose(xprt->xp_socket);
481 (void) mem_free(xprt->xp_netid, strlen(xprt->xp_netid) + 1);
486 svc_vc_rendezvous_destroy(SVCXPRT *xprt)
489 SOLISTEN_LOCK(xprt->xp_socket);
490 if (xprt->xp_upcallset) {
491 xprt->xp_upcallset = 0;
492 solisten_upcall_set(xprt->xp_socket, NULL, NULL);
494 SOLISTEN_UNLOCK(xprt->xp_socket);
496 svc_vc_destroy_common(xprt);
500 svc_vc_destroy(SVCXPRT *xprt)
502 struct cf_conn *cd = (struct cf_conn *)xprt->xp_p1;
503 CLIENT *cl = (CLIENT *)xprt->xp_p2;
505 SOCKBUF_LOCK(&xprt->xp_socket->so_rcv);
506 if (xprt->xp_upcallset) {
507 xprt->xp_upcallset = 0;
508 if (xprt->xp_socket->so_rcv.sb_upcall != NULL)
509 soupcall_clear(xprt->xp_socket, SO_RCV);
511 SOCKBUF_UNLOCK(&xprt->xp_socket->so_rcv);
516 svc_vc_destroy_common(xprt);
521 m_freem(cd->mpending);
522 mem_free(cd, sizeof(*cd));
526 svc_vc_backchannel_destroy(SVCXPRT *xprt)
528 struct cf_conn *cd = (struct cf_conn *)xprt->xp_p1;
538 mem_free(cd, sizeof(*cd));
543 svc_vc_control(SVCXPRT *xprt, const u_int rq, void *in)
549 svc_vc_rendezvous_control(SVCXPRT *xprt, const u_int rq, void *in)
556 svc_vc_backchannel_control(SVCXPRT *xprt, const u_int rq, void *in)
562 static enum xprt_stat
563 svc_vc_stat(SVCXPRT *xprt)
567 cd = (struct cf_conn *)(xprt->xp_p1);
569 if (cd->strm_stat == XPRT_DIED)
572 if (cd->mreq != NULL && cd->resid == 0 && cd->eor)
573 return (XPRT_MOREREQS);
575 if (soreadable(xprt->xp_socket))
576 return (XPRT_MOREREQS);
582 svc_vc_ack(SVCXPRT *xprt, uint32_t *ack)
585 *ack = atomic_load_acq_32(&xprt->xp_snt_cnt);
586 *ack -= sbused(&xprt->xp_socket->so_snd);
590 static enum xprt_stat
591 svc_vc_backchannel_stat(SVCXPRT *xprt)
595 cd = (struct cf_conn *)(xprt->xp_p1);
597 if (cd->mreq != NULL)
598 return (XPRT_MOREREQS);
604 * If we have an mbuf chain in cd->mpending, try to parse a record from it,
605 * leaving the result in cd->mreq. If we don't have a complete record, leave
606 * the partial result in cd->mreq and try to read more from the socket.
609 svc_vc_process_pending(SVCXPRT *xprt)
611 struct cf_conn *cd = (struct cf_conn *) xprt->xp_p1;
612 struct socket *so = xprt->xp_socket;
616 * If cd->resid is non-zero, we have part of the
617 * record already, otherwise we are expecting a record
620 if (!cd->resid && cd->mpending) {
622 * See if there is enough data buffered to
623 * make up a record marker. Make sure we can
624 * handle the case where the record marker is
625 * split across more than one mbuf.
631 while (n < sizeof(uint32_t) && m) {
635 if (n < sizeof(uint32_t)) {
636 so->so_rcv.sb_lowat = sizeof(uint32_t) - n;
639 m_copydata(cd->mpending, 0, sizeof(header),
641 header = ntohl(header);
642 cd->eor = (header & 0x80000000) != 0;
643 cd->resid = header & 0x7fffffff;
644 m_adj(cd->mpending, sizeof(uint32_t));
648 * Start pulling off mbufs from cd->mpending
649 * until we either have a complete record or
650 * we run out of data. We use m_split to pull
651 * data - it will pull as much as possible and
652 * split the last mbuf if necessary.
654 while (cd->mpending && cd->resid) {
656 if (cd->mpending->m_next
657 || cd->mpending->m_len > cd->resid)
658 cd->mpending = m_split(cd->mpending,
659 cd->resid, M_WAITOK);
663 m_last(cd->mreq)->m_next = m;
667 cd->resid -= m->m_len;
673 * Block receive upcalls if we have more data pending,
674 * otherwise report our need.
677 so->so_rcv.sb_lowat = INT_MAX;
679 so->so_rcv.sb_lowat =
680 imax(1, imin(cd->resid, so->so_rcv.sb_hiwat / 2));
685 svc_vc_recv(SVCXPRT *xprt, struct rpc_msg *msg,
686 struct sockaddr **addrp, struct mbuf **mp)
688 struct cf_conn *cd = (struct cf_conn *) xprt->xp_p1;
690 struct mbuf *m, *ctrl;
691 struct socket* so = xprt->xp_socket;
694 uint32_t reterr, xid_plus_direction[2];
695 struct cmsghdr *cmsg;
696 struct tls_get_record tgr;
700 * Serialise access to the socket and our own record parsing
703 sx_xlock(&xprt->xp_lock);
706 /* If we have no request ready, check pending queue. */
707 while (cd->mpending &&
708 (cd->mreq == NULL || cd->resid != 0 || !cd->eor)) {
709 if (!svc_vc_process_pending(xprt))
713 /* Process and return complete request in cd->mreq. */
714 if (cd->mreq != NULL && cd->resid == 0 && cd->eor) {
717 * Now, check for a backchannel reply.
718 * The XID is in the first uint32_t of the reply
719 * and the message direction is the second one.
721 if ((cd->mreq->m_len >= sizeof(xid_plus_direction) ||
722 m_length(cd->mreq, NULL) >=
723 sizeof(xid_plus_direction)) &&
724 xprt->xp_p2 != NULL) {
725 m_copydata(cd->mreq, 0,
726 sizeof(xid_plus_direction),
727 (char *)xid_plus_direction);
728 xid_plus_direction[0] =
729 ntohl(xid_plus_direction[0]);
730 xid_plus_direction[1] =
731 ntohl(xid_plus_direction[1]);
732 /* Check message direction. */
733 if (xid_plus_direction[1] == REPLY) {
734 clnt_bck_svccall(xprt->xp_p2,
736 xid_plus_direction[0]);
742 xdrmbuf_create(&xdrs, cd->mreq, XDR_DECODE);
745 /* Check for next request in a pending queue. */
746 svc_vc_process_pending(xprt);
747 if (cd->mreq == NULL || cd->resid != 0) {
748 SOCKBUF_LOCK(&so->so_rcv);
750 xprt_inactive_self(xprt);
751 SOCKBUF_UNLOCK(&so->so_rcv);
754 sx_xunlock(&xprt->xp_lock);
756 if (! xdr_callmsg(&xdrs, msg)) {
762 *mp = xdrmbuf_getall(&xdrs);
769 * If receiving is disabled so that a TLS handshake can be
770 * done by the rpctlssd daemon, return FALSE here.
772 rcvflag = MSG_DONTWAIT;
773 if ((xprt->xp_tls & RPCTLS_FLAGS_HANDSHAKE) != 0)
774 rcvflag |= MSG_TLSAPPDATA;
776 if (xprt->xp_dontrcv) {
777 sx_xunlock(&xprt->xp_lock);
782 * The socket upcall calls xprt_active() which will eventually
783 * cause the server to call us here. We attempt to
784 * read as much as possible from the socket and put
785 * the result in cd->mpending. If the read fails,
786 * we have drained both cd->mpending and the socket so
787 * we can call xprt_inactive().
789 uio.uio_resid = 1000000000;
790 uio.uio_td = curthread;
792 error = soreceive(so, NULL, &uio, &m, &ctrl, &rcvflag);
794 if (error == EWOULDBLOCK) {
796 * We must re-test for readability after
797 * taking the lock to protect us in the case
798 * where a new packet arrives on the socket
799 * after our call to soreceive fails with
802 SOCKBUF_LOCK(&so->so_rcv);
804 xprt_inactive_self(xprt);
805 SOCKBUF_UNLOCK(&so->so_rcv);
806 sx_xunlock(&xprt->xp_lock);
811 * A return of ENXIO indicates that there is a
812 * non-application data record at the head of the
813 * socket's receive queue, for TLS connections.
814 * This record needs to be handled in userland
815 * via an SSL_read() call, so do an upcall to the daemon.
817 if ((xprt->xp_tls & RPCTLS_FLAGS_HANDSHAKE) != 0 &&
819 /* Disable reception. */
820 xprt->xp_dontrcv = TRUE;
821 sx_xunlock(&xprt->xp_lock);
822 ret = rpctls_srv_handlerecord(xprt->xp_sslsec,
823 xprt->xp_sslusec, xprt->xp_sslrefno,
825 sx_xlock(&xprt->xp_lock);
826 xprt->xp_dontrcv = FALSE;
827 if (ret != RPC_SUCCESS || reterr != RPCTLSERR_OK) {
829 * All we can do is soreceive() it and
832 rcvflag = MSG_DONTWAIT;
835 sx_xunlock(&xprt->xp_lock);
836 xprt_active(xprt); /* Harmless if already active. */
841 SOCKBUF_LOCK(&so->so_rcv);
842 if (xprt->xp_upcallset) {
843 xprt->xp_upcallset = 0;
844 soupcall_clear(so, SO_RCV);
846 SOCKBUF_UNLOCK(&so->so_rcv);
847 xprt_inactive_self(xprt);
848 cd->strm_stat = XPRT_DIED;
849 sx_xunlock(&xprt->xp_lock);
855 * EOF - the other end has closed the socket.
857 xprt_inactive_self(xprt);
858 cd->strm_stat = XPRT_DIED;
859 sx_xunlock(&xprt->xp_lock);
863 /* Process any record header(s). */
865 cmsg = mtod(ctrl, struct cmsghdr *);
866 if (cmsg->cmsg_type == TLS_GET_RECORD &&
867 cmsg->cmsg_len == CMSG_LEN(sizeof(tgr))) {
868 memcpy(&tgr, CMSG_DATA(cmsg), sizeof(tgr));
870 * This should have been handled by
871 * the rpctls_svc_handlerecord()
872 * upcall. If not, all we can do is
875 if (tgr.tls_type != TLS_RLTYPE_APP) {
878 rcvflag = MSG_DONTWAIT | MSG_TLSAPPDATA;
886 m_last(cd->mpending)->m_next = m;
893 svc_vc_backchannel_recv(SVCXPRT *xprt, struct rpc_msg *msg,
894 struct sockaddr **addrp, struct mbuf **mp)
896 struct cf_conn *cd = (struct cf_conn *) xprt->xp_p1;
901 sx_xlock(&xprt->xp_lock);
902 ct = (struct ct_data *)xprt->xp_p2;
904 sx_xunlock(&xprt->xp_lock);
907 mtx_lock(&ct->ct_lock);
910 xprt_inactive_self(xprt);
911 mtx_unlock(&ct->ct_lock);
912 sx_xunlock(&xprt->xp_lock);
915 cd->mreq = m->m_nextpkt;
916 mtx_unlock(&ct->ct_lock);
917 sx_xunlock(&xprt->xp_lock);
919 xdrmbuf_create(&xdrs, m, XDR_DECODE);
920 if (! xdr_callmsg(&xdrs, msg)) {
925 *mp = xdrmbuf_getall(&xdrs);
931 svc_vc_reply(SVCXPRT *xprt, struct rpc_msg *msg,
932 struct sockaddr *addr, struct mbuf *m, uint32_t *seq)
937 int error, len, maxextsiz;
943 * Leave space for record mark.
945 mrep = m_gethdr(M_WAITOK, MT_DATA);
946 mrep->m_data += sizeof(uint32_t);
948 xdrmbuf_create(&xdrs, mrep, XDR_ENCODE);
950 if (msg->rm_reply.rp_stat == MSG_ACCEPTED &&
951 msg->rm_reply.rp_acpt.ar_stat == SUCCESS) {
952 if (!xdr_replymsg(&xdrs, msg))
955 xdrmbuf_append(&xdrs, m);
957 stat = xdr_replymsg(&xdrs, msg);
964 * Prepend a record marker containing the reply length.
966 M_PREPEND(mrep, sizeof(uint32_t), M_WAITOK);
967 len = mrep->m_pkthdr.len;
968 *mtod(mrep, uint32_t *) =
969 htonl(0x80000000 | (len - sizeof(uint32_t)));
971 /* For RPC-over-TLS, copy mrep to a chain of ext_pgs. */
972 if ((xprt->xp_tls & RPCTLS_FLAGS_HANDSHAKE) != 0) {
974 * Copy the mbuf chain to a chain of
975 * ext_pgs mbuf(s) as required by KERN_TLS.
977 maxextsiz = TLS_MAX_MSG_SIZE_V10_2;
979 if (rpctls_getinfo(&maxlen, false, false))
980 maxextsiz = min(maxextsiz, maxlen);
982 mrep = _rpc_copym_into_ext_pgs(mrep, maxextsiz);
984 atomic_add_32(&xprt->xp_snd_cnt, len);
986 * sosend consumes mreq.
988 error = sosend(xprt->xp_socket, NULL, NULL, mrep, NULL,
991 atomic_add_rel_32(&xprt->xp_snt_cnt, len);
993 *seq = xprt->xp_snd_cnt;
996 atomic_subtract_32(&xprt->xp_snd_cnt, len);
1007 svc_vc_backchannel_reply(SVCXPRT *xprt, struct rpc_msg *msg,
1008 struct sockaddr *addr, struct mbuf *m, uint32_t *seq)
1014 int error, maxextsiz;
1020 * Leave space for record mark.
1022 mrep = m_gethdr(M_WAITOK, MT_DATA);
1023 mrep->m_data += sizeof(uint32_t);
1025 xdrmbuf_create(&xdrs, mrep, XDR_ENCODE);
1027 if (msg->rm_reply.rp_stat == MSG_ACCEPTED &&
1028 msg->rm_reply.rp_acpt.ar_stat == SUCCESS) {
1029 if (!xdr_replymsg(&xdrs, msg))
1032 xdrmbuf_append(&xdrs, m);
1034 stat = xdr_replymsg(&xdrs, msg);
1041 * Prepend a record marker containing the reply length.
1043 M_PREPEND(mrep, sizeof(uint32_t), M_WAITOK);
1044 *mtod(mrep, uint32_t *) =
1045 htonl(0x80000000 | (mrep->m_pkthdr.len
1046 - sizeof(uint32_t)));
1048 /* For RPC-over-TLS, copy mrep to a chain of ext_pgs. */
1049 if ((xprt->xp_tls & RPCTLS_FLAGS_HANDSHAKE) != 0) {
1051 * Copy the mbuf chain to a chain of
1052 * ext_pgs mbuf(s) as required by KERN_TLS.
1054 maxextsiz = TLS_MAX_MSG_SIZE_V10_2;
1056 if (rpctls_getinfo(&maxlen, false, false))
1057 maxextsiz = min(maxextsiz, maxlen);
1059 mrep = _rpc_copym_into_ext_pgs(mrep, maxextsiz);
1061 sx_xlock(&xprt->xp_lock);
1062 ct = (struct ct_data *)xprt->xp_p2;
1064 error = sosend(ct->ct_socket, NULL, NULL, mrep, NULL,
1068 sx_xunlock(&xprt->xp_lock);
1089 svc_vc_soupcall(struct socket *so, void *arg, int waitflag)
1091 SVCXPRT *xprt = (SVCXPRT *) arg;
1093 if (soreadable(xprt->xp_socket))
1099 svc_vc_rendezvous_soupcall(struct socket *head, void *arg, int waitflag)
1101 SVCXPRT *xprt = (SVCXPRT *) arg;
1103 if (!TAILQ_EMPTY(&head->sol_comp))
1110 * Get the effective UID of the sending process. Used by rpcbind, keyserv
1111 * and rpc.yppasswdd on AF_LOCAL.
1114 __rpc_get_local_uid(SVCXPRT *transp, uid_t *uid) {
1118 struct sockaddr *sa;
1120 sock = transp->xp_fd;
1121 sa = (struct sockaddr *)transp->xp_rtaddr;
1122 if (sa->sa_family == AF_LOCAL) {
1123 ret = getpeereid(sock, &euid, &egid);