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 const 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 const 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 const 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 KASSERT(SOLISTENING(head),
332 ("%s: socket %p is not listening", __func__, head));
335 error = mac_socket_check_accept(curthread->td_ucred, head);
340 * XXXGL: we want non-blocking semantics. The socket could be a
341 * socket created by kernel as well as socket shared with userland,
342 * so we can't be sure about presense of SS_NBIO. We also shall not
343 * toggle it on the socket, since that may surprise userland. So we
344 * set SS_NBIO only temporarily.
347 nbio = head->so_state & SS_NBIO;
348 head->so_state |= SS_NBIO;
349 error = solisten_dequeue(head, &so, 0);
350 head->so_state &= (nbio & ~SS_NBIO);
354 so->so_state |= nbio;
357 /* connection has been removed from the listen queue */
358 KNOTE_UNLOCKED(&head->so_rdsel.si_note, 0);
365 svc_vc_rendezvous_recv(SVCXPRT *xprt, struct rpc_msg *msg,
366 struct sockaddr **addrp, struct mbuf **mp)
368 struct socket *so = NULL;
369 struct sockaddr *sa = NULL;
374 * The socket upcall calls xprt_active() which will eventually
375 * cause the server to call us here. We attempt to accept a
376 * connection from the socket and turn it into a new
377 * transport. If the accept fails, we have drained all pending
378 * connections so we call xprt_inactive().
380 sx_xlock(&xprt->xp_lock);
382 error = svc_vc_accept(xprt->xp_socket, &so);
384 if (error == EWOULDBLOCK) {
386 * We must re-test for new connections after taking
387 * the lock to protect us in the case where a new
388 * connection arrives after our call to accept fails
391 SOLISTEN_LOCK(xprt->xp_socket);
392 if (TAILQ_EMPTY(&xprt->xp_socket->sol_comp))
393 xprt_inactive_self(xprt);
394 SOLISTEN_UNLOCK(xprt->xp_socket);
395 sx_xunlock(&xprt->xp_lock);
400 SOLISTEN_LOCK(xprt->xp_socket);
401 if (xprt->xp_upcallset) {
402 xprt->xp_upcallset = 0;
403 soupcall_clear(xprt->xp_socket, SO_RCV);
405 SOLISTEN_UNLOCK(xprt->xp_socket);
406 xprt_inactive_self(xprt);
407 sx_xunlock(&xprt->xp_lock);
411 sx_xunlock(&xprt->xp_lock);
414 error = soaccept(so, &sa);
418 * XXX not sure if I need to call sofree or soclose here.
426 * svc_vc_create_conn will call xprt_register - we don't need
427 * to do anything with the new connection except derefence it.
429 new_xprt = svc_vc_create_conn(xprt->xp_pool, so, sa);
433 SVC_RELEASE(new_xprt);
438 return (FALSE); /* there is never an rpc msg to be processed */
442 static enum xprt_stat
443 svc_vc_rendezvous_stat(SVCXPRT *xprt)
450 svc_vc_destroy_common(SVCXPRT *xprt)
455 if (xprt->xp_socket) {
456 if ((xprt->xp_tls & (RPCTLS_FLAGS_HANDSHAKE |
457 RPCTLS_FLAGS_HANDSHFAIL)) != 0) {
458 if ((xprt->xp_tls & RPCTLS_FLAGS_HANDSHAKE) != 0) {
460 * If the upcall fails, the socket has
461 * probably been closed via the rpctlssd
462 * daemon having crashed or been
463 * restarted, so just ignore returned stat.
465 stat = rpctls_srv_disconnect(xprt->xp_sslsec,
466 xprt->xp_sslusec, xprt->xp_sslrefno,
469 /* Must sorele() to get rid of reference. */
470 CURVNET_SET(xprt->xp_socket->so_vnet);
471 SOCK_LOCK(xprt->xp_socket);
472 sorele(xprt->xp_socket);
475 (void)soclose(xprt->xp_socket);
479 (void) mem_free(xprt->xp_netid, strlen(xprt->xp_netid) + 1);
484 svc_vc_rendezvous_destroy(SVCXPRT *xprt)
487 SOLISTEN_LOCK(xprt->xp_socket);
488 if (xprt->xp_upcallset) {
489 xprt->xp_upcallset = 0;
490 solisten_upcall_set(xprt->xp_socket, NULL, NULL);
492 SOLISTEN_UNLOCK(xprt->xp_socket);
494 svc_vc_destroy_common(xprt);
498 svc_vc_destroy(SVCXPRT *xprt)
500 struct cf_conn *cd = (struct cf_conn *)xprt->xp_p1;
501 CLIENT *cl = (CLIENT *)xprt->xp_p2;
503 SOCKBUF_LOCK(&xprt->xp_socket->so_rcv);
504 if (xprt->xp_upcallset) {
505 xprt->xp_upcallset = 0;
506 if (xprt->xp_socket->so_rcv.sb_upcall != NULL)
507 soupcall_clear(xprt->xp_socket, SO_RCV);
509 SOCKBUF_UNLOCK(&xprt->xp_socket->so_rcv);
514 svc_vc_destroy_common(xprt);
519 m_freem(cd->mpending);
520 mem_free(cd, sizeof(*cd));
524 svc_vc_backchannel_destroy(SVCXPRT *xprt)
526 struct cf_conn *cd = (struct cf_conn *)xprt->xp_p1;
536 mem_free(cd, sizeof(*cd));
541 svc_vc_control(SVCXPRT *xprt, const u_int rq, void *in)
547 svc_vc_rendezvous_control(SVCXPRT *xprt, const u_int rq, void *in)
554 svc_vc_backchannel_control(SVCXPRT *xprt, const u_int rq, void *in)
560 static enum xprt_stat
561 svc_vc_stat(SVCXPRT *xprt)
565 cd = (struct cf_conn *)(xprt->xp_p1);
567 if (cd->strm_stat == XPRT_DIED)
570 if (cd->mreq != NULL && cd->resid == 0 && cd->eor)
571 return (XPRT_MOREREQS);
573 if (soreadable(xprt->xp_socket))
574 return (XPRT_MOREREQS);
580 svc_vc_ack(SVCXPRT *xprt, uint32_t *ack)
583 *ack = atomic_load_acq_32(&xprt->xp_snt_cnt);
584 *ack -= sbused(&xprt->xp_socket->so_snd);
588 static enum xprt_stat
589 svc_vc_backchannel_stat(SVCXPRT *xprt)
593 cd = (struct cf_conn *)(xprt->xp_p1);
595 if (cd->mreq != NULL)
596 return (XPRT_MOREREQS);
602 * If we have an mbuf chain in cd->mpending, try to parse a record from it,
603 * leaving the result in cd->mreq. If we don't have a complete record, leave
604 * the partial result in cd->mreq and try to read more from the socket.
607 svc_vc_process_pending(SVCXPRT *xprt)
609 struct cf_conn *cd = (struct cf_conn *) xprt->xp_p1;
610 struct socket *so = xprt->xp_socket;
614 * If cd->resid is non-zero, we have part of the
615 * record already, otherwise we are expecting a record
618 if (!cd->resid && cd->mpending) {
620 * See if there is enough data buffered to
621 * make up a record marker. Make sure we can
622 * handle the case where the record marker is
623 * split across more than one mbuf.
629 while (n < sizeof(uint32_t) && m) {
633 if (n < sizeof(uint32_t)) {
634 so->so_rcv.sb_lowat = sizeof(uint32_t) - n;
637 m_copydata(cd->mpending, 0, sizeof(header),
639 header = ntohl(header);
640 cd->eor = (header & 0x80000000) != 0;
641 cd->resid = header & 0x7fffffff;
642 m_adj(cd->mpending, sizeof(uint32_t));
646 * Start pulling off mbufs from cd->mpending
647 * until we either have a complete record or
648 * we run out of data. We use m_split to pull
649 * data - it will pull as much as possible and
650 * split the last mbuf if necessary.
652 while (cd->mpending && cd->resid) {
654 if (cd->mpending->m_next
655 || cd->mpending->m_len > cd->resid)
656 cd->mpending = m_split(cd->mpending,
657 cd->resid, M_WAITOK);
661 m_last(cd->mreq)->m_next = m;
665 cd->resid -= m->m_len;
671 * Block receive upcalls if we have more data pending,
672 * otherwise report our need.
675 so->so_rcv.sb_lowat = INT_MAX;
677 so->so_rcv.sb_lowat =
678 imax(1, imin(cd->resid, so->so_rcv.sb_hiwat / 2));
683 svc_vc_recv(SVCXPRT *xprt, struct rpc_msg *msg,
684 struct sockaddr **addrp, struct mbuf **mp)
686 struct cf_conn *cd = (struct cf_conn *) xprt->xp_p1;
688 struct mbuf *m, *ctrl;
689 struct socket* so = xprt->xp_socket;
692 uint32_t reterr, xid_plus_direction[2];
693 struct cmsghdr *cmsg;
694 struct tls_get_record tgr;
698 * Serialise access to the socket and our own record parsing
701 sx_xlock(&xprt->xp_lock);
704 /* If we have no request ready, check pending queue. */
705 while (cd->mpending &&
706 (cd->mreq == NULL || cd->resid != 0 || !cd->eor)) {
707 if (!svc_vc_process_pending(xprt))
711 /* Process and return complete request in cd->mreq. */
712 if (cd->mreq != NULL && cd->resid == 0 && cd->eor) {
715 * Now, check for a backchannel reply.
716 * The XID is in the first uint32_t of the reply
717 * and the message direction is the second one.
719 if ((cd->mreq->m_len >= sizeof(xid_plus_direction) ||
720 m_length(cd->mreq, NULL) >=
721 sizeof(xid_plus_direction)) &&
722 xprt->xp_p2 != NULL) {
723 m_copydata(cd->mreq, 0,
724 sizeof(xid_plus_direction),
725 (char *)xid_plus_direction);
726 xid_plus_direction[0] =
727 ntohl(xid_plus_direction[0]);
728 xid_plus_direction[1] =
729 ntohl(xid_plus_direction[1]);
730 /* Check message direction. */
731 if (xid_plus_direction[1] == REPLY) {
732 clnt_bck_svccall(xprt->xp_p2,
734 xid_plus_direction[0]);
740 xdrmbuf_create(&xdrs, cd->mreq, XDR_DECODE);
743 /* Check for next request in a pending queue. */
744 svc_vc_process_pending(xprt);
745 if (cd->mreq == NULL || cd->resid != 0) {
746 SOCKBUF_LOCK(&so->so_rcv);
748 xprt_inactive_self(xprt);
749 SOCKBUF_UNLOCK(&so->so_rcv);
752 sx_xunlock(&xprt->xp_lock);
754 if (! xdr_callmsg(&xdrs, msg)) {
760 *mp = xdrmbuf_getall(&xdrs);
767 * If receiving is disabled so that a TLS handshake can be
768 * done by the rpctlssd daemon, return FALSE here.
770 rcvflag = MSG_DONTWAIT;
771 if ((xprt->xp_tls & RPCTLS_FLAGS_HANDSHAKE) != 0)
772 rcvflag |= MSG_TLSAPPDATA;
774 if (xprt->xp_dontrcv) {
775 sx_xunlock(&xprt->xp_lock);
780 * The socket upcall calls xprt_active() which will eventually
781 * cause the server to call us here. We attempt to
782 * read as much as possible from the socket and put
783 * the result in cd->mpending. If the read fails,
784 * we have drained both cd->mpending and the socket so
785 * we can call xprt_inactive().
787 uio.uio_resid = 1000000000;
788 uio.uio_td = curthread;
790 error = soreceive(so, NULL, &uio, &m, &ctrl, &rcvflag);
792 if (error == EWOULDBLOCK) {
794 * We must re-test for readability after
795 * taking the lock to protect us in the case
796 * where a new packet arrives on the socket
797 * after our call to soreceive fails with
800 SOCKBUF_LOCK(&so->so_rcv);
802 xprt_inactive_self(xprt);
803 SOCKBUF_UNLOCK(&so->so_rcv);
804 sx_xunlock(&xprt->xp_lock);
809 * A return of ENXIO indicates that there is an
810 * alert record at the head of the
811 * socket's receive queue, for TLS connections.
812 * This record needs to be handled in userland
813 * via an SSL_read() call, so do an upcall to the daemon.
815 if ((xprt->xp_tls & RPCTLS_FLAGS_HANDSHAKE) != 0 &&
817 /* Disable reception. */
818 xprt->xp_dontrcv = TRUE;
819 sx_xunlock(&xprt->xp_lock);
820 ret = rpctls_srv_handlerecord(xprt->xp_sslsec,
821 xprt->xp_sslusec, xprt->xp_sslrefno,
823 sx_xlock(&xprt->xp_lock);
824 xprt->xp_dontrcv = FALSE;
825 if (ret != RPC_SUCCESS || reterr != RPCTLSERR_OK) {
827 * All we can do is soreceive() it and
830 rcvflag = MSG_DONTWAIT;
833 sx_xunlock(&xprt->xp_lock);
834 xprt_active(xprt); /* Harmless if already active. */
839 SOCKBUF_LOCK(&so->so_rcv);
840 if (xprt->xp_upcallset) {
841 xprt->xp_upcallset = 0;
842 soupcall_clear(so, SO_RCV);
844 SOCKBUF_UNLOCK(&so->so_rcv);
845 xprt_inactive_self(xprt);
846 cd->strm_stat = XPRT_DIED;
847 sx_xunlock(&xprt->xp_lock);
853 * EOF - the other end has closed the socket.
855 xprt_inactive_self(xprt);
856 cd->strm_stat = XPRT_DIED;
857 sx_xunlock(&xprt->xp_lock);
861 /* Process any record header(s). */
863 cmsg = mtod(ctrl, struct cmsghdr *);
864 if (cmsg->cmsg_type == TLS_GET_RECORD &&
865 cmsg->cmsg_len == CMSG_LEN(sizeof(tgr))) {
866 memcpy(&tgr, CMSG_DATA(cmsg), sizeof(tgr));
868 * TLS_RLTYPE_ALERT records should be handled
869 * since soreceive() would have returned
870 * ENXIO. Just throw any other
871 * non-TLS_RLTYPE_APP records away.
873 if (tgr.tls_type != TLS_RLTYPE_APP) {
876 rcvflag = MSG_DONTWAIT | MSG_TLSAPPDATA;
884 m_last(cd->mpending)->m_next = m;
891 svc_vc_backchannel_recv(SVCXPRT *xprt, struct rpc_msg *msg,
892 struct sockaddr **addrp, struct mbuf **mp)
894 struct cf_conn *cd = (struct cf_conn *) xprt->xp_p1;
899 sx_xlock(&xprt->xp_lock);
900 ct = (struct ct_data *)xprt->xp_p2;
902 sx_xunlock(&xprt->xp_lock);
905 mtx_lock(&ct->ct_lock);
908 xprt_inactive_self(xprt);
909 mtx_unlock(&ct->ct_lock);
910 sx_xunlock(&xprt->xp_lock);
913 cd->mreq = m->m_nextpkt;
914 mtx_unlock(&ct->ct_lock);
915 sx_xunlock(&xprt->xp_lock);
917 xdrmbuf_create(&xdrs, m, XDR_DECODE);
918 if (! xdr_callmsg(&xdrs, msg)) {
923 *mp = xdrmbuf_getall(&xdrs);
929 svc_vc_reply(SVCXPRT *xprt, struct rpc_msg *msg,
930 struct sockaddr *addr, struct mbuf *m, uint32_t *seq)
935 int error, len, maxextsiz;
941 * Leave space for record mark.
943 mrep = m_gethdr(M_WAITOK, MT_DATA);
944 mrep->m_data += sizeof(uint32_t);
946 xdrmbuf_create(&xdrs, mrep, XDR_ENCODE);
948 if (msg->rm_reply.rp_stat == MSG_ACCEPTED &&
949 msg->rm_reply.rp_acpt.ar_stat == SUCCESS) {
950 if (!xdr_replymsg(&xdrs, msg))
953 xdrmbuf_append(&xdrs, m);
955 stat = xdr_replymsg(&xdrs, msg);
962 * Prepend a record marker containing the reply length.
964 M_PREPEND(mrep, sizeof(uint32_t), M_WAITOK);
965 len = mrep->m_pkthdr.len;
966 *mtod(mrep, uint32_t *) =
967 htonl(0x80000000 | (len - sizeof(uint32_t)));
969 /* For RPC-over-TLS, copy mrep to a chain of ext_pgs. */
970 if ((xprt->xp_tls & RPCTLS_FLAGS_HANDSHAKE) != 0) {
972 * Copy the mbuf chain to a chain of
973 * ext_pgs mbuf(s) as required by KERN_TLS.
975 maxextsiz = TLS_MAX_MSG_SIZE_V10_2;
977 if (rpctls_getinfo(&maxlen, false, false))
978 maxextsiz = min(maxextsiz, maxlen);
980 mrep = _rpc_copym_into_ext_pgs(mrep, maxextsiz);
982 atomic_add_32(&xprt->xp_snd_cnt, len);
984 * sosend consumes mreq.
986 error = sosend(xprt->xp_socket, NULL, NULL, mrep, NULL,
989 atomic_add_rel_32(&xprt->xp_snt_cnt, len);
991 *seq = xprt->xp_snd_cnt;
994 atomic_subtract_32(&xprt->xp_snd_cnt, len);
1005 svc_vc_backchannel_reply(SVCXPRT *xprt, struct rpc_msg *msg,
1006 struct sockaddr *addr, struct mbuf *m, uint32_t *seq)
1012 int error, maxextsiz;
1018 * Leave space for record mark.
1020 mrep = m_gethdr(M_WAITOK, MT_DATA);
1021 mrep->m_data += sizeof(uint32_t);
1023 xdrmbuf_create(&xdrs, mrep, XDR_ENCODE);
1025 if (msg->rm_reply.rp_stat == MSG_ACCEPTED &&
1026 msg->rm_reply.rp_acpt.ar_stat == SUCCESS) {
1027 if (!xdr_replymsg(&xdrs, msg))
1030 xdrmbuf_append(&xdrs, m);
1032 stat = xdr_replymsg(&xdrs, msg);
1039 * Prepend a record marker containing the reply length.
1041 M_PREPEND(mrep, sizeof(uint32_t), M_WAITOK);
1042 *mtod(mrep, uint32_t *) =
1043 htonl(0x80000000 | (mrep->m_pkthdr.len
1044 - sizeof(uint32_t)));
1046 /* For RPC-over-TLS, copy mrep to a chain of ext_pgs. */
1047 if ((xprt->xp_tls & RPCTLS_FLAGS_HANDSHAKE) != 0) {
1049 * Copy the mbuf chain to a chain of
1050 * ext_pgs mbuf(s) as required by KERN_TLS.
1052 maxextsiz = TLS_MAX_MSG_SIZE_V10_2;
1054 if (rpctls_getinfo(&maxlen, false, false))
1055 maxextsiz = min(maxextsiz, maxlen);
1057 mrep = _rpc_copym_into_ext_pgs(mrep, maxextsiz);
1059 sx_xlock(&xprt->xp_lock);
1060 ct = (struct ct_data *)xprt->xp_p2;
1062 error = sosend(ct->ct_socket, NULL, NULL, mrep, NULL,
1066 sx_xunlock(&xprt->xp_lock);
1087 svc_vc_soupcall(struct socket *so, void *arg, int waitflag)
1089 SVCXPRT *xprt = (SVCXPRT *) arg;
1091 if (soreadable(xprt->xp_socket))
1097 svc_vc_rendezvous_soupcall(struct socket *head, void *arg, int waitflag)
1099 SVCXPRT *xprt = (SVCXPRT *) arg;
1101 if (!TAILQ_EMPTY(&head->sol_comp))
1108 * Get the effective UID of the sending process. Used by rpcbind, keyserv
1109 * and rpc.yppasswdd on AF_LOCAL.
1112 __rpc_get_local_uid(SVCXPRT *transp, uid_t *uid) {
1116 struct sockaddr *sa;
1118 sock = transp->xp_fd;
1119 sa = (struct sockaddr *)transp->xp_rtaddr;
1120 if (sa->sa_family == AF_LOCAL) {
1121 ret = getpeereid(sock, &euid, &egid);