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 <sys/param.h>
49 #include <sys/limits.h>
51 #include <sys/kernel.h>
52 #include <sys/malloc.h>
54 #include <sys/mutex.h>
56 #include <sys/protosw.h>
57 #include <sys/queue.h>
58 #include <sys/socket.h>
59 #include <sys/socketvar.h>
61 #include <sys/systm.h>
66 #include <netinet/tcp.h>
71 #include <rpc/rpc_com.h>
73 #include <security/mac/mac_framework.h>
75 static bool_t svc_vc_rendezvous_recv(SVCXPRT *, struct rpc_msg *,
76 struct sockaddr **, struct mbuf **);
77 static enum xprt_stat svc_vc_rendezvous_stat(SVCXPRT *);
78 static void svc_vc_rendezvous_destroy(SVCXPRT *);
79 static bool_t svc_vc_null(void);
80 static void svc_vc_destroy(SVCXPRT *);
81 static enum xprt_stat svc_vc_stat(SVCXPRT *);
82 static bool_t svc_vc_ack(SVCXPRT *, uint32_t *);
83 static bool_t svc_vc_recv(SVCXPRT *, struct rpc_msg *,
84 struct sockaddr **, struct mbuf **);
85 static bool_t svc_vc_reply(SVCXPRT *, struct rpc_msg *,
86 struct sockaddr *, struct mbuf *, uint32_t *seq);
87 static bool_t svc_vc_control(SVCXPRT *xprt, const u_int rq, void *in);
88 static bool_t svc_vc_rendezvous_control (SVCXPRT *xprt, const u_int rq,
90 static void svc_vc_backchannel_destroy(SVCXPRT *);
91 static enum xprt_stat svc_vc_backchannel_stat(SVCXPRT *);
92 static bool_t svc_vc_backchannel_recv(SVCXPRT *, struct rpc_msg *,
93 struct sockaddr **, struct mbuf **);
94 static bool_t svc_vc_backchannel_reply(SVCXPRT *, struct rpc_msg *,
95 struct sockaddr *, struct mbuf *, uint32_t *);
96 static bool_t svc_vc_backchannel_control(SVCXPRT *xprt, const u_int rq,
98 static SVCXPRT *svc_vc_create_conn(SVCPOOL *pool, struct socket *so,
99 struct sockaddr *raddr);
100 static int svc_vc_accept(struct socket *head, struct socket **sop);
101 static int svc_vc_soupcall(struct socket *so, void *arg, int waitflag);
102 static int svc_vc_rendezvous_soupcall(struct socket *, void *, int);
104 static struct xp_ops svc_vc_rendezvous_ops = {
105 .xp_recv = svc_vc_rendezvous_recv,
106 .xp_stat = svc_vc_rendezvous_stat,
107 .xp_reply = (bool_t (*)(SVCXPRT *, struct rpc_msg *,
108 struct sockaddr *, struct mbuf *, uint32_t *))svc_vc_null,
109 .xp_destroy = svc_vc_rendezvous_destroy,
110 .xp_control = svc_vc_rendezvous_control
113 static struct xp_ops svc_vc_ops = {
114 .xp_recv = svc_vc_recv,
115 .xp_stat = svc_vc_stat,
116 .xp_ack = svc_vc_ack,
117 .xp_reply = svc_vc_reply,
118 .xp_destroy = svc_vc_destroy,
119 .xp_control = svc_vc_control
122 static struct xp_ops svc_vc_backchannel_ops = {
123 .xp_recv = svc_vc_backchannel_recv,
124 .xp_stat = svc_vc_backchannel_stat,
125 .xp_reply = svc_vc_backchannel_reply,
126 .xp_destroy = svc_vc_backchannel_destroy,
127 .xp_control = svc_vc_backchannel_control
132 * xprt = svc_vc_create(sock, send_buf_size, recv_buf_size);
134 * Creates, registers, and returns a (rpc) tcp based transporter.
135 * Once *xprt is initialized, it is registered as a transporter
136 * see (svc.h, xprt_register). This routine returns
137 * a NULL if a problem occurred.
139 * The filedescriptor passed in is expected to refer to a bound, but
140 * not yet connected socket.
142 * Since streams do buffered io similar to stdio, the caller can specify
143 * how big the send and receive buffers are via the second and third parms;
144 * 0 => use the system default.
147 svc_vc_create(SVCPOOL *pool, struct socket *so, size_t sendsize,
155 if (so->so_state & (SS_ISCONNECTED|SS_ISDISCONNECTED)) {
157 CURVNET_SET(so->so_vnet);
158 error = so->so_proto->pr_usrreqs->pru_peeraddr(so, &sa);
162 xprt = svc_vc_create_conn(pool, so, sa);
168 xprt = svc_xprt_alloc();
169 sx_init(&xprt->xp_lock, "xprt->xp_lock");
170 xprt->xp_pool = pool;
171 xprt->xp_socket = so;
174 xprt->xp_ops = &svc_vc_rendezvous_ops;
176 CURVNET_SET(so->so_vnet);
177 error = so->so_proto->pr_usrreqs->pru_sockaddr(so, &sa);
180 goto cleanup_svc_vc_create;
183 memcpy(&xprt->xp_ltaddr, sa, sa->sa_len);
188 solisten(so, -1, curthread);
191 xprt->xp_upcallset = 1;
192 solisten_upcall_set(so, svc_vc_rendezvous_soupcall, xprt);
197 cleanup_svc_vc_create:
198 sx_destroy(&xprt->xp_lock);
205 * Create a new transport for a socket optained via soaccept().
208 svc_vc_create_conn(SVCPOOL *pool, struct socket *so, struct sockaddr *raddr)
212 struct sockaddr* sa = NULL;
217 bzero(&opt, sizeof(struct sockopt));
218 opt.sopt_dir = SOPT_SET;
219 opt.sopt_level = SOL_SOCKET;
220 opt.sopt_name = SO_KEEPALIVE;
222 opt.sopt_valsize = sizeof(one);
223 error = sosetopt(so, &opt);
228 if (so->so_proto->pr_protocol == IPPROTO_TCP) {
229 bzero(&opt, sizeof(struct sockopt));
230 opt.sopt_dir = SOPT_SET;
231 opt.sopt_level = IPPROTO_TCP;
232 opt.sopt_name = TCP_NODELAY;
234 opt.sopt_valsize = sizeof(one);
235 error = sosetopt(so, &opt);
241 cd = mem_alloc(sizeof(*cd));
242 cd->strm_stat = XPRT_IDLE;
244 xprt = svc_xprt_alloc();
245 sx_init(&xprt->xp_lock, "xprt->xp_lock");
246 xprt->xp_pool = pool;
247 xprt->xp_socket = so;
250 xprt->xp_ops = &svc_vc_ops;
253 * See http://www.connectathon.org/talks96/nfstcp.pdf - client
254 * has a 5 minute timer, server has a 6 minute timer.
256 xprt->xp_idletimeout = 6 * 60;
258 memcpy(&xprt->xp_rtaddr, raddr, raddr->sa_len);
260 CURVNET_SET(so->so_vnet);
261 error = so->so_proto->pr_usrreqs->pru_sockaddr(so, &sa);
264 goto cleanup_svc_vc_create;
266 memcpy(&xprt->xp_ltaddr, sa, sa->sa_len);
271 SOCKBUF_LOCK(&so->so_rcv);
272 xprt->xp_upcallset = 1;
273 soupcall_set(so, SO_RCV, svc_vc_soupcall, xprt);
274 SOCKBUF_UNLOCK(&so->so_rcv);
277 * Throw the transport into the active list in case it already
278 * has some data buffered.
280 sx_xlock(&xprt->xp_lock);
282 sx_xunlock(&xprt->xp_lock);
285 cleanup_svc_vc_create:
286 sx_destroy(&xprt->xp_lock);
288 mem_free(cd, sizeof(*cd));
294 * Create a new transport for a backchannel on a clnt_vc socket.
297 svc_vc_create_backchannel(SVCPOOL *pool)
299 SVCXPRT *xprt = NULL;
300 struct cf_conn *cd = NULL;
302 cd = mem_alloc(sizeof(*cd));
303 cd->strm_stat = XPRT_IDLE;
305 xprt = svc_xprt_alloc();
306 sx_init(&xprt->xp_lock, "xprt->xp_lock");
307 xprt->xp_pool = pool;
308 xprt->xp_socket = NULL;
311 xprt->xp_ops = &svc_vc_backchannel_ops;
316 * This does all of the accept except the final call to soaccept. The
317 * caller will call soaccept after dropping its locks (soaccept may
321 svc_vc_accept(struct socket *head, struct socket **sop)
327 /* XXXGL: shouldn't that be an assertion? */
328 if ((head->so_options & SO_ACCEPTCONN) == 0) {
333 error = mac_socket_check_accept(curthread->td_ucred, head);
338 * XXXGL: we want non-blocking semantics. The socket could be a
339 * socket created by kernel as well as socket shared with userland,
340 * so we can't be sure about presense of SS_NBIO. We also shall not
341 * toggle it on the socket, since that may surprise userland. So we
342 * set SS_NBIO only temporarily.
345 nbio = head->so_state & SS_NBIO;
346 head->so_state |= SS_NBIO;
347 error = solisten_dequeue(head, &so, 0);
348 head->so_state &= (nbio & ~SS_NBIO);
352 so->so_state |= nbio;
355 /* connection has been removed from the listen queue */
356 KNOTE_UNLOCKED(&head->so_rdsel.si_note, 0);
363 svc_vc_rendezvous_recv(SVCXPRT *xprt, struct rpc_msg *msg,
364 struct sockaddr **addrp, struct mbuf **mp)
366 struct socket *so = NULL;
367 struct sockaddr *sa = NULL;
372 * The socket upcall calls xprt_active() which will eventually
373 * cause the server to call us here. We attempt to accept a
374 * connection from the socket and turn it into a new
375 * transport. If the accept fails, we have drained all pending
376 * connections so we call xprt_inactive().
378 sx_xlock(&xprt->xp_lock);
380 error = svc_vc_accept(xprt->xp_socket, &so);
382 if (error == EWOULDBLOCK) {
384 * We must re-test for new connections after taking
385 * the lock to protect us in the case where a new
386 * connection arrives after our call to accept fails
389 SOLISTEN_LOCK(xprt->xp_socket);
390 if (TAILQ_EMPTY(&xprt->xp_socket->sol_comp))
391 xprt_inactive_self(xprt);
392 SOLISTEN_UNLOCK(xprt->xp_socket);
393 sx_xunlock(&xprt->xp_lock);
398 SOLISTEN_LOCK(xprt->xp_socket);
399 if (xprt->xp_upcallset) {
400 xprt->xp_upcallset = 0;
401 soupcall_clear(xprt->xp_socket, SO_RCV);
403 SOLISTEN_UNLOCK(xprt->xp_socket);
404 xprt_inactive_self(xprt);
405 sx_xunlock(&xprt->xp_lock);
409 sx_xunlock(&xprt->xp_lock);
412 error = soaccept(so, &sa);
416 * XXX not sure if I need to call sofree or soclose here.
424 * svc_vc_create_conn will call xprt_register - we don't need
425 * to do anything with the new connection except derefence it.
427 new_xprt = svc_vc_create_conn(xprt->xp_pool, so, sa);
431 SVC_RELEASE(new_xprt);
436 return (FALSE); /* there is never an rpc msg to be processed */
440 static enum xprt_stat
441 svc_vc_rendezvous_stat(SVCXPRT *xprt)
448 svc_vc_destroy_common(SVCXPRT *xprt)
452 (void)soclose(xprt->xp_socket);
455 (void) mem_free(xprt->xp_netid, strlen(xprt->xp_netid) + 1);
460 svc_vc_rendezvous_destroy(SVCXPRT *xprt)
463 SOLISTEN_LOCK(xprt->xp_socket);
464 if (xprt->xp_upcallset) {
465 xprt->xp_upcallset = 0;
466 solisten_upcall_set(xprt->xp_socket, NULL, NULL);
468 SOLISTEN_UNLOCK(xprt->xp_socket);
470 svc_vc_destroy_common(xprt);
474 svc_vc_destroy(SVCXPRT *xprt)
476 struct cf_conn *cd = (struct cf_conn *)xprt->xp_p1;
478 SOCKBUF_LOCK(&xprt->xp_socket->so_rcv);
479 if (xprt->xp_upcallset) {
480 xprt->xp_upcallset = 0;
481 soupcall_clear(xprt->xp_socket, SO_RCV);
483 SOCKBUF_UNLOCK(&xprt->xp_socket->so_rcv);
485 svc_vc_destroy_common(xprt);
490 m_freem(cd->mpending);
491 mem_free(cd, sizeof(*cd));
495 svc_vc_backchannel_destroy(SVCXPRT *xprt)
497 struct cf_conn *cd = (struct cf_conn *)xprt->xp_p1;
507 mem_free(cd, sizeof(*cd));
512 svc_vc_control(SVCXPRT *xprt, const u_int rq, void *in)
518 svc_vc_rendezvous_control(SVCXPRT *xprt, const u_int rq, void *in)
525 svc_vc_backchannel_control(SVCXPRT *xprt, const u_int rq, void *in)
531 static enum xprt_stat
532 svc_vc_stat(SVCXPRT *xprt)
536 cd = (struct cf_conn *)(xprt->xp_p1);
538 if (cd->strm_stat == XPRT_DIED)
541 if (cd->mreq != NULL && cd->resid == 0 && cd->eor)
542 return (XPRT_MOREREQS);
544 if (soreadable(xprt->xp_socket))
545 return (XPRT_MOREREQS);
551 svc_vc_ack(SVCXPRT *xprt, uint32_t *ack)
554 *ack = atomic_load_acq_32(&xprt->xp_snt_cnt);
555 *ack -= sbused(&xprt->xp_socket->so_snd);
559 static enum xprt_stat
560 svc_vc_backchannel_stat(SVCXPRT *xprt)
564 cd = (struct cf_conn *)(xprt->xp_p1);
566 if (cd->mreq != NULL)
567 return (XPRT_MOREREQS);
573 * If we have an mbuf chain in cd->mpending, try to parse a record from it,
574 * leaving the result in cd->mreq. If we don't have a complete record, leave
575 * the partial result in cd->mreq and try to read more from the socket.
578 svc_vc_process_pending(SVCXPRT *xprt)
580 struct cf_conn *cd = (struct cf_conn *) xprt->xp_p1;
581 struct socket *so = xprt->xp_socket;
585 * If cd->resid is non-zero, we have part of the
586 * record already, otherwise we are expecting a record
589 if (!cd->resid && cd->mpending) {
591 * See if there is enough data buffered to
592 * make up a record marker. Make sure we can
593 * handle the case where the record marker is
594 * split across more than one mbuf.
600 while (n < sizeof(uint32_t) && m) {
604 if (n < sizeof(uint32_t)) {
605 so->so_rcv.sb_lowat = sizeof(uint32_t) - n;
608 m_copydata(cd->mpending, 0, sizeof(header),
610 header = ntohl(header);
611 cd->eor = (header & 0x80000000) != 0;
612 cd->resid = header & 0x7fffffff;
613 m_adj(cd->mpending, sizeof(uint32_t));
617 * Start pulling off mbufs from cd->mpending
618 * until we either have a complete record or
619 * we run out of data. We use m_split to pull
620 * data - it will pull as much as possible and
621 * split the last mbuf if necessary.
623 while (cd->mpending && cd->resid) {
625 if (cd->mpending->m_next
626 || cd->mpending->m_len > cd->resid)
627 cd->mpending = m_split(cd->mpending,
628 cd->resid, M_WAITOK);
632 m_last(cd->mreq)->m_next = m;
636 cd->resid -= m->m_len;
642 * Block receive upcalls if we have more data pending,
643 * otherwise report our need.
646 so->so_rcv.sb_lowat = INT_MAX;
648 so->so_rcv.sb_lowat =
649 imax(1, imin(cd->resid, so->so_rcv.sb_hiwat / 2));
654 svc_vc_recv(SVCXPRT *xprt, struct rpc_msg *msg,
655 struct sockaddr **addrp, struct mbuf **mp)
657 struct cf_conn *cd = (struct cf_conn *) xprt->xp_p1;
660 struct socket* so = xprt->xp_socket;
663 uint32_t xid_plus_direction[2];
666 * Serialise access to the socket and our own record parsing
669 sx_xlock(&xprt->xp_lock);
672 /* If we have no request ready, check pending queue. */
673 while (cd->mpending &&
674 (cd->mreq == NULL || cd->resid != 0 || !cd->eor)) {
675 if (!svc_vc_process_pending(xprt))
679 /* Process and return complete request in cd->mreq. */
680 if (cd->mreq != NULL && cd->resid == 0 && cd->eor) {
683 * Now, check for a backchannel reply.
684 * The XID is in the first uint32_t of the reply
685 * and the message direction is the second one.
687 if ((cd->mreq->m_len >= sizeof(xid_plus_direction) ||
688 m_length(cd->mreq, NULL) >=
689 sizeof(xid_plus_direction)) &&
690 xprt->xp_p2 != NULL) {
691 m_copydata(cd->mreq, 0,
692 sizeof(xid_plus_direction),
693 (char *)xid_plus_direction);
694 xid_plus_direction[0] =
695 ntohl(xid_plus_direction[0]);
696 xid_plus_direction[1] =
697 ntohl(xid_plus_direction[1]);
698 /* Check message direction. */
699 if (xid_plus_direction[1] == REPLY) {
700 clnt_bck_svccall(xprt->xp_p2,
702 xid_plus_direction[0]);
708 xdrmbuf_create(&xdrs, cd->mreq, XDR_DECODE);
711 /* Check for next request in a pending queue. */
712 svc_vc_process_pending(xprt);
713 if (cd->mreq == NULL || cd->resid != 0) {
714 SOCKBUF_LOCK(&so->so_rcv);
716 xprt_inactive_self(xprt);
717 SOCKBUF_UNLOCK(&so->so_rcv);
720 sx_xunlock(&xprt->xp_lock);
722 if (! xdr_callmsg(&xdrs, msg)) {
728 *mp = xdrmbuf_getall(&xdrs);
735 * The socket upcall calls xprt_active() which will eventually
736 * cause the server to call us here. We attempt to
737 * read as much as possible from the socket and put
738 * the result in cd->mpending. If the read fails,
739 * we have drained both cd->mpending and the socket so
740 * we can call xprt_inactive().
742 uio.uio_resid = 1000000000;
743 uio.uio_td = curthread;
745 rcvflag = MSG_DONTWAIT;
746 error = soreceive(so, NULL, &uio, &m, NULL, &rcvflag);
748 if (error == EWOULDBLOCK) {
750 * We must re-test for readability after
751 * taking the lock to protect us in the case
752 * where a new packet arrives on the socket
753 * after our call to soreceive fails with
756 SOCKBUF_LOCK(&so->so_rcv);
758 xprt_inactive_self(xprt);
759 SOCKBUF_UNLOCK(&so->so_rcv);
760 sx_xunlock(&xprt->xp_lock);
765 SOCKBUF_LOCK(&so->so_rcv);
766 if (xprt->xp_upcallset) {
767 xprt->xp_upcallset = 0;
768 soupcall_clear(so, SO_RCV);
770 SOCKBUF_UNLOCK(&so->so_rcv);
771 xprt_inactive_self(xprt);
772 cd->strm_stat = XPRT_DIED;
773 sx_xunlock(&xprt->xp_lock);
779 * EOF - the other end has closed the socket.
781 xprt_inactive_self(xprt);
782 cd->strm_stat = XPRT_DIED;
783 sx_xunlock(&xprt->xp_lock);
788 m_last(cd->mpending)->m_next = m;
795 svc_vc_backchannel_recv(SVCXPRT *xprt, struct rpc_msg *msg,
796 struct sockaddr **addrp, struct mbuf **mp)
798 struct cf_conn *cd = (struct cf_conn *) xprt->xp_p1;
803 sx_xlock(&xprt->xp_lock);
804 ct = (struct ct_data *)xprt->xp_p2;
806 sx_xunlock(&xprt->xp_lock);
809 mtx_lock(&ct->ct_lock);
812 xprt_inactive_self(xprt);
813 mtx_unlock(&ct->ct_lock);
814 sx_xunlock(&xprt->xp_lock);
817 cd->mreq = m->m_nextpkt;
818 mtx_unlock(&ct->ct_lock);
819 sx_xunlock(&xprt->xp_lock);
821 xdrmbuf_create(&xdrs, m, XDR_DECODE);
822 if (! xdr_callmsg(&xdrs, msg)) {
827 *mp = xdrmbuf_getall(&xdrs);
833 svc_vc_reply(SVCXPRT *xprt, struct rpc_msg *msg,
834 struct sockaddr *addr, struct mbuf *m, uint32_t *seq)
842 * Leave space for record mark.
844 mrep = m_gethdr(M_WAITOK, MT_DATA);
845 mrep->m_data += sizeof(uint32_t);
847 xdrmbuf_create(&xdrs, mrep, XDR_ENCODE);
849 if (msg->rm_reply.rp_stat == MSG_ACCEPTED &&
850 msg->rm_reply.rp_acpt.ar_stat == SUCCESS) {
851 if (!xdr_replymsg(&xdrs, msg))
854 xdrmbuf_append(&xdrs, m);
856 stat = xdr_replymsg(&xdrs, msg);
863 * Prepend a record marker containing the reply length.
865 M_PREPEND(mrep, sizeof(uint32_t), M_WAITOK);
866 len = mrep->m_pkthdr.len;
867 *mtod(mrep, uint32_t *) =
868 htonl(0x80000000 | (len - sizeof(uint32_t)));
869 atomic_add_32(&xprt->xp_snd_cnt, len);
870 error = sosend(xprt->xp_socket, NULL, NULL, mrep, NULL,
873 atomic_add_rel_32(&xprt->xp_snt_cnt, len);
875 *seq = xprt->xp_snd_cnt;
878 atomic_subtract_32(&xprt->xp_snd_cnt, len);
889 svc_vc_backchannel_reply(SVCXPRT *xprt, struct rpc_msg *msg,
890 struct sockaddr *addr, struct mbuf *m, uint32_t *seq)
899 * Leave space for record mark.
901 mrep = m_gethdr(M_WAITOK, MT_DATA);
902 mrep->m_data += sizeof(uint32_t);
904 xdrmbuf_create(&xdrs, mrep, XDR_ENCODE);
906 if (msg->rm_reply.rp_stat == MSG_ACCEPTED &&
907 msg->rm_reply.rp_acpt.ar_stat == SUCCESS) {
908 if (!xdr_replymsg(&xdrs, msg))
911 xdrmbuf_append(&xdrs, m);
913 stat = xdr_replymsg(&xdrs, msg);
920 * Prepend a record marker containing the reply length.
922 M_PREPEND(mrep, sizeof(uint32_t), M_WAITOK);
923 *mtod(mrep, uint32_t *) =
924 htonl(0x80000000 | (mrep->m_pkthdr.len
925 - sizeof(uint32_t)));
926 sx_xlock(&xprt->xp_lock);
927 ct = (struct ct_data *)xprt->xp_p2;
929 error = sosend(ct->ct_socket, NULL, NULL, mrep, NULL,
933 sx_xunlock(&xprt->xp_lock);
954 svc_vc_soupcall(struct socket *so, void *arg, int waitflag)
956 SVCXPRT *xprt = (SVCXPRT *) arg;
958 if (soreadable(xprt->xp_socket))
964 svc_vc_rendezvous_soupcall(struct socket *head, void *arg, int waitflag)
966 SVCXPRT *xprt = (SVCXPRT *) arg;
968 if (!TAILQ_EMPTY(&head->sol_comp))
975 * Get the effective UID of the sending process. Used by rpcbind, keyserv
976 * and rpc.yppasswdd on AF_LOCAL.
979 __rpc_get_local_uid(SVCXPRT *transp, uid_t *uid) {
985 sock = transp->xp_fd;
986 sa = (struct sockaddr *)transp->xp_rtaddr;
987 if (sa->sa_family == AF_LOCAL) {
988 ret = getpeereid(sock, &euid, &egid);