1 /* $NetBSD: svc_vc.c,v 1.7 2000/08/03 00:01:53 fvdl Exp $ */
4 * Copyright (c) 2009, Sun Microsystems, Inc.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions are met:
9 * - Redistributions of source code must retain the above copyright notice,
10 * this list of conditions and the following disclaimer.
11 * - Redistributions in binary form must reproduce the above copyright notice,
12 * this list of conditions and the following disclaimer in the documentation
13 * and/or other materials provided with the distribution.
14 * - Neither the name of Sun Microsystems, Inc. nor the names of its
15 * contributors may be used to endorse or promote products derived
16 * from this software without specific prior written permission.
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
22 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
28 * POSSIBILITY OF SUCH DAMAGE.
31 #if defined(LIBC_SCCS) && !defined(lint)
32 static char *sccsid2 = "@(#)svc_tcp.c 1.21 87/08/11 Copyr 1984 Sun Micro";
33 static char *sccsid = "@(#)svc_tcp.c 2.2 88/08/01 4.0 RPCSRC";
35 #include <sys/cdefs.h>
36 __FBSDID("$FreeBSD$");
39 * svc_vc.c, Server side for Connection Oriented based RPC.
41 * Actually implements two flavors of transporter -
42 * a tcp rendezvouser (a listner and connection establisher)
43 * and a record/tcp stream.
46 #include <sys/param.h>
48 #include <sys/kernel.h>
49 #include <sys/malloc.h>
51 #include <sys/mutex.h>
53 #include <sys/protosw.h>
54 #include <sys/queue.h>
55 #include <sys/socket.h>
56 #include <sys/socketvar.h>
58 #include <sys/systm.h>
63 #include <netinet/tcp.h>
68 #include <rpc/rpc_com.h>
70 #include <security/mac/mac_framework.h>
72 static bool_t svc_vc_rendezvous_recv(SVCXPRT *, struct rpc_msg *,
73 struct sockaddr **, struct mbuf **);
74 static enum xprt_stat svc_vc_rendezvous_stat(SVCXPRT *);
75 static void svc_vc_rendezvous_destroy(SVCXPRT *);
76 static bool_t svc_vc_null(void);
77 static void svc_vc_destroy(SVCXPRT *);
78 static enum xprt_stat svc_vc_stat(SVCXPRT *);
79 static bool_t svc_vc_ack(SVCXPRT *, uint32_t *);
80 static bool_t svc_vc_recv(SVCXPRT *, struct rpc_msg *,
81 struct sockaddr **, struct mbuf **);
82 static bool_t svc_vc_reply(SVCXPRT *, struct rpc_msg *,
83 struct sockaddr *, struct mbuf *, uint32_t *seq);
84 static bool_t svc_vc_control(SVCXPRT *xprt, const u_int rq, void *in);
85 static bool_t svc_vc_rendezvous_control (SVCXPRT *xprt, const u_int rq,
87 static void svc_vc_backchannel_destroy(SVCXPRT *);
88 static enum xprt_stat svc_vc_backchannel_stat(SVCXPRT *);
89 static bool_t svc_vc_backchannel_recv(SVCXPRT *, struct rpc_msg *,
90 struct sockaddr **, struct mbuf **);
91 static bool_t svc_vc_backchannel_reply(SVCXPRT *, struct rpc_msg *,
92 struct sockaddr *, struct mbuf *, uint32_t *);
93 static bool_t svc_vc_backchannel_control(SVCXPRT *xprt, const u_int rq,
95 static SVCXPRT *svc_vc_create_conn(SVCPOOL *pool, struct socket *so,
96 struct sockaddr *raddr);
97 static int svc_vc_accept(struct socket *head, struct socket **sop);
98 static int svc_vc_soupcall(struct socket *so, void *arg, int waitflag);
100 static struct xp_ops svc_vc_rendezvous_ops = {
101 .xp_recv = svc_vc_rendezvous_recv,
102 .xp_stat = svc_vc_rendezvous_stat,
103 .xp_reply = (bool_t (*)(SVCXPRT *, struct rpc_msg *,
104 struct sockaddr *, struct mbuf *, uint32_t *))svc_vc_null,
105 .xp_destroy = svc_vc_rendezvous_destroy,
106 .xp_control = svc_vc_rendezvous_control
109 static struct xp_ops svc_vc_ops = {
110 .xp_recv = svc_vc_recv,
111 .xp_stat = svc_vc_stat,
112 .xp_ack = svc_vc_ack,
113 .xp_reply = svc_vc_reply,
114 .xp_destroy = svc_vc_destroy,
115 .xp_control = svc_vc_control
118 static struct xp_ops svc_vc_backchannel_ops = {
119 .xp_recv = svc_vc_backchannel_recv,
120 .xp_stat = svc_vc_backchannel_stat,
121 .xp_reply = svc_vc_backchannel_reply,
122 .xp_destroy = svc_vc_backchannel_destroy,
123 .xp_control = svc_vc_backchannel_control
128 * xprt = svc_vc_create(sock, send_buf_size, recv_buf_size);
130 * Creates, registers, and returns a (rpc) tcp based transporter.
131 * Once *xprt is initialized, it is registered as a transporter
132 * see (svc.h, xprt_register). This routine returns
133 * a NULL if a problem occurred.
135 * The filedescriptor passed in is expected to refer to a bound, but
136 * not yet connected socket.
138 * Since streams do buffered io similar to stdio, the caller can specify
139 * how big the send and receive buffers are via the second and third parms;
140 * 0 => use the system default.
143 svc_vc_create(SVCPOOL *pool, struct socket *so, size_t sendsize,
151 if (so->so_state & (SS_ISCONNECTED|SS_ISDISCONNECTED)) {
153 CURVNET_SET(so->so_vnet);
154 error = so->so_proto->pr_usrreqs->pru_peeraddr(so, &sa);
158 xprt = svc_vc_create_conn(pool, so, sa);
164 xprt = svc_xprt_alloc();
165 sx_init(&xprt->xp_lock, "xprt->xp_lock");
166 xprt->xp_pool = pool;
167 xprt->xp_socket = so;
170 xprt->xp_ops = &svc_vc_rendezvous_ops;
172 CURVNET_SET(so->so_vnet);
173 error = so->so_proto->pr_usrreqs->pru_sockaddr(so, &sa);
176 goto cleanup_svc_vc_create;
179 memcpy(&xprt->xp_ltaddr, sa, sa->sa_len);
184 solisten(so, -1, curthread);
186 SOCKBUF_LOCK(&so->so_rcv);
187 xprt->xp_upcallset = 1;
188 soupcall_set(so, SO_RCV, svc_vc_soupcall, xprt);
189 SOCKBUF_UNLOCK(&so->so_rcv);
193 cleanup_svc_vc_create:
194 sx_destroy(&xprt->xp_lock);
201 * Create a new transport for a socket optained via soaccept().
204 svc_vc_create_conn(SVCPOOL *pool, struct socket *so, struct sockaddr *raddr)
208 struct sockaddr* sa = NULL;
213 bzero(&opt, sizeof(struct sockopt));
214 opt.sopt_dir = SOPT_SET;
215 opt.sopt_level = SOL_SOCKET;
216 opt.sopt_name = SO_KEEPALIVE;
218 opt.sopt_valsize = sizeof(one);
219 error = sosetopt(so, &opt);
224 if (so->so_proto->pr_protocol == IPPROTO_TCP) {
225 bzero(&opt, sizeof(struct sockopt));
226 opt.sopt_dir = SOPT_SET;
227 opt.sopt_level = IPPROTO_TCP;
228 opt.sopt_name = TCP_NODELAY;
230 opt.sopt_valsize = sizeof(one);
231 error = sosetopt(so, &opt);
237 cd = mem_alloc(sizeof(*cd));
238 cd->strm_stat = XPRT_IDLE;
240 xprt = svc_xprt_alloc();
241 sx_init(&xprt->xp_lock, "xprt->xp_lock");
242 xprt->xp_pool = pool;
243 xprt->xp_socket = so;
246 xprt->xp_ops = &svc_vc_ops;
249 * See http://www.connectathon.org/talks96/nfstcp.pdf - client
250 * has a 5 minute timer, server has a 6 minute timer.
252 xprt->xp_idletimeout = 6 * 60;
254 memcpy(&xprt->xp_rtaddr, raddr, raddr->sa_len);
256 CURVNET_SET(so->so_vnet);
257 error = so->so_proto->pr_usrreqs->pru_sockaddr(so, &sa);
260 goto cleanup_svc_vc_create;
262 memcpy(&xprt->xp_ltaddr, sa, sa->sa_len);
267 SOCKBUF_LOCK(&so->so_rcv);
268 xprt->xp_upcallset = 1;
269 soupcall_set(so, SO_RCV, svc_vc_soupcall, xprt);
270 SOCKBUF_UNLOCK(&so->so_rcv);
273 * Throw the transport into the active list in case it already
274 * has some data buffered.
276 sx_xlock(&xprt->xp_lock);
278 sx_xunlock(&xprt->xp_lock);
281 cleanup_svc_vc_create:
282 sx_destroy(&xprt->xp_lock);
284 mem_free(cd, sizeof(*cd));
290 * Create a new transport for a backchannel on a clnt_vc socket.
293 svc_vc_create_backchannel(SVCPOOL *pool)
295 SVCXPRT *xprt = NULL;
296 struct cf_conn *cd = NULL;
298 cd = mem_alloc(sizeof(*cd));
299 cd->strm_stat = XPRT_IDLE;
301 xprt = svc_xprt_alloc();
302 sx_init(&xprt->xp_lock, "xprt->xp_lock");
303 xprt->xp_pool = pool;
304 xprt->xp_socket = NULL;
307 xprt->xp_ops = &svc_vc_backchannel_ops;
312 * This does all of the accept except the final call to soaccept. The
313 * caller will call soaccept after dropping its locks (soaccept may
317 svc_vc_accept(struct socket *head, struct socket **sop)
322 if ((head->so_options & SO_ACCEPTCONN) == 0) {
327 error = mac_socket_check_accept(curthread->td_ucred, head);
332 if (TAILQ_EMPTY(&head->so_comp)) {
337 so = TAILQ_FIRST(&head->so_comp);
338 KASSERT(!(so->so_qstate & SQ_INCOMP), ("svc_vc_accept: so SQ_INCOMP"));
339 KASSERT(so->so_qstate & SQ_COMP, ("svc_vc_accept: so not SQ_COMP"));
342 * Before changing the flags on the socket, we have to bump the
343 * reference count. Otherwise, if the protocol calls sofree(),
344 * the socket will be released due to a zero refcount.
345 * XXX might not need soref() since this is simpler than kern_accept.
347 SOCK_LOCK(so); /* soref() and so_state update */
348 soref(so); /* file descriptor reference */
350 TAILQ_REMOVE(&head->so_comp, so, so_list);
352 so->so_state |= (head->so_state & SS_NBIO);
353 so->so_qstate &= ~SQ_COMP;
361 /* connection has been removed from the listen queue */
362 KNOTE_UNLOCKED(&head->so_rcv.sb_sel.si_note, 0);
369 svc_vc_rendezvous_recv(SVCXPRT *xprt, struct rpc_msg *msg,
370 struct sockaddr **addrp, struct mbuf **mp)
372 struct socket *so = NULL;
373 struct sockaddr *sa = NULL;
378 * The socket upcall calls xprt_active() which will eventually
379 * cause the server to call us here. We attempt to accept a
380 * connection from the socket and turn it into a new
381 * transport. If the accept fails, we have drained all pending
382 * connections so we call xprt_inactive().
384 sx_xlock(&xprt->xp_lock);
386 error = svc_vc_accept(xprt->xp_socket, &so);
388 if (error == EWOULDBLOCK) {
390 * We must re-test for new connections after taking
391 * the lock to protect us in the case where a new
392 * connection arrives after our call to accept fails
396 if (TAILQ_EMPTY(&xprt->xp_socket->so_comp))
397 xprt_inactive_self(xprt);
399 sx_xunlock(&xprt->xp_lock);
404 SOCKBUF_LOCK(&xprt->xp_socket->so_rcv);
405 if (xprt->xp_upcallset) {
406 xprt->xp_upcallset = 0;
407 soupcall_clear(xprt->xp_socket, SO_RCV);
409 SOCKBUF_UNLOCK(&xprt->xp_socket->so_rcv);
410 xprt_inactive_self(xprt);
411 sx_xunlock(&xprt->xp_lock);
415 sx_xunlock(&xprt->xp_lock);
418 error = soaccept(so, &sa);
422 * XXX not sure if I need to call sofree or soclose here.
430 * svc_vc_create_conn will call xprt_register - we don't need
431 * to do anything with the new connection except derefence it.
433 new_xprt = svc_vc_create_conn(xprt->xp_pool, so, sa);
437 SVC_RELEASE(new_xprt);
442 return (FALSE); /* there is never an rpc msg to be processed */
446 static enum xprt_stat
447 svc_vc_rendezvous_stat(SVCXPRT *xprt)
454 svc_vc_destroy_common(SVCXPRT *xprt)
456 SOCKBUF_LOCK(&xprt->xp_socket->so_rcv);
457 if (xprt->xp_upcallset) {
458 xprt->xp_upcallset = 0;
459 soupcall_clear(xprt->xp_socket, SO_RCV);
461 SOCKBUF_UNLOCK(&xprt->xp_socket->so_rcv);
464 (void)soclose(xprt->xp_socket);
467 (void) mem_free(xprt->xp_netid, strlen(xprt->xp_netid) + 1);
472 svc_vc_rendezvous_destroy(SVCXPRT *xprt)
475 svc_vc_destroy_common(xprt);
479 svc_vc_destroy(SVCXPRT *xprt)
481 struct cf_conn *cd = (struct cf_conn *)xprt->xp_p1;
483 svc_vc_destroy_common(xprt);
488 m_freem(cd->mpending);
489 mem_free(cd, sizeof(*cd));
493 svc_vc_backchannel_destroy(SVCXPRT *xprt)
495 struct cf_conn *cd = (struct cf_conn *)xprt->xp_p1;
505 mem_free(cd, sizeof(*cd));
510 svc_vc_control(SVCXPRT *xprt, const u_int rq, void *in)
516 svc_vc_rendezvous_control(SVCXPRT *xprt, const u_int rq, void *in)
523 svc_vc_backchannel_control(SVCXPRT *xprt, const u_int rq, void *in)
529 static enum xprt_stat
530 svc_vc_stat(SVCXPRT *xprt)
534 cd = (struct cf_conn *)(xprt->xp_p1);
536 if (cd->strm_stat == XPRT_DIED)
539 if (cd->mreq != NULL && cd->resid == 0 && cd->eor)
540 return (XPRT_MOREREQS);
542 if (soreadable(xprt->xp_socket))
543 return (XPRT_MOREREQS);
549 svc_vc_ack(SVCXPRT *xprt, uint32_t *ack)
552 *ack = atomic_load_acq_32(&xprt->xp_snt_cnt);
553 *ack -= sbused(&xprt->xp_socket->so_snd);
557 static enum xprt_stat
558 svc_vc_backchannel_stat(SVCXPRT *xprt)
562 cd = (struct cf_conn *)(xprt->xp_p1);
564 if (cd->mreq != NULL)
565 return (XPRT_MOREREQS);
571 * If we have an mbuf chain in cd->mpending, try to parse a record from it,
572 * leaving the result in cd->mreq. If we don't have a complete record, leave
573 * the partial result in cd->mreq and try to read more from the socket.
576 svc_vc_process_pending(SVCXPRT *xprt)
578 struct cf_conn *cd = (struct cf_conn *) xprt->xp_p1;
579 struct socket *so = xprt->xp_socket;
583 * If cd->resid is non-zero, we have part of the
584 * record already, otherwise we are expecting a record
587 if (!cd->resid && cd->mpending) {
589 * See if there is enough data buffered to
590 * make up a record marker. Make sure we can
591 * handle the case where the record marker is
592 * split across more than one mbuf.
598 while (n < sizeof(uint32_t) && m) {
602 if (n < sizeof(uint32_t)) {
603 so->so_rcv.sb_lowat = sizeof(uint32_t) - n;
606 m_copydata(cd->mpending, 0, sizeof(header),
608 header = ntohl(header);
609 cd->eor = (header & 0x80000000) != 0;
610 cd->resid = header & 0x7fffffff;
611 m_adj(cd->mpending, sizeof(uint32_t));
615 * Start pulling off mbufs from cd->mpending
616 * until we either have a complete record or
617 * we run out of data. We use m_split to pull
618 * data - it will pull as much as possible and
619 * split the last mbuf if necessary.
621 while (cd->mpending && cd->resid) {
623 if (cd->mpending->m_next
624 || cd->mpending->m_len > cd->resid)
625 cd->mpending = m_split(cd->mpending,
626 cd->resid, M_WAITOK);
630 m_last(cd->mreq)->m_next = m;
634 cd->resid -= m->m_len;
640 * Block receive upcalls if we have more data pending,
641 * otherwise report our need.
644 so->so_rcv.sb_lowat = INT_MAX;
646 so->so_rcv.sb_lowat =
647 imax(1, imin(cd->resid, so->so_rcv.sb_hiwat / 2));
652 svc_vc_recv(SVCXPRT *xprt, struct rpc_msg *msg,
653 struct sockaddr **addrp, struct mbuf **mp)
655 struct cf_conn *cd = (struct cf_conn *) xprt->xp_p1;
658 struct socket* so = xprt->xp_socket;
661 uint32_t xid_plus_direction[2];
664 * Serialise access to the socket and our own record parsing
667 sx_xlock(&xprt->xp_lock);
670 /* If we have no request ready, check pending queue. */
671 while (cd->mpending &&
672 (cd->mreq == NULL || cd->resid != 0 || !cd->eor)) {
673 if (!svc_vc_process_pending(xprt))
677 /* Process and return complete request in cd->mreq. */
678 if (cd->mreq != NULL && cd->resid == 0 && cd->eor) {
681 * Now, check for a backchannel reply.
682 * The XID is in the first uint32_t of the reply
683 * and the message direction is the second one.
685 if ((cd->mreq->m_len >= sizeof(xid_plus_direction) ||
686 m_length(cd->mreq, NULL) >=
687 sizeof(xid_plus_direction)) &&
688 xprt->xp_p2 != NULL) {
689 m_copydata(cd->mreq, 0,
690 sizeof(xid_plus_direction),
691 (char *)xid_plus_direction);
692 xid_plus_direction[0] =
693 ntohl(xid_plus_direction[0]);
694 xid_plus_direction[1] =
695 ntohl(xid_plus_direction[1]);
696 /* Check message direction. */
697 if (xid_plus_direction[1] == REPLY) {
698 clnt_bck_svccall(xprt->xp_p2,
700 xid_plus_direction[0]);
706 xdrmbuf_create(&xdrs, cd->mreq, XDR_DECODE);
709 /* Check for next request in a pending queue. */
710 svc_vc_process_pending(xprt);
711 if (cd->mreq == NULL || cd->resid != 0) {
712 SOCKBUF_LOCK(&so->so_rcv);
714 xprt_inactive_self(xprt);
715 SOCKBUF_UNLOCK(&so->so_rcv);
718 sx_xunlock(&xprt->xp_lock);
720 if (! xdr_callmsg(&xdrs, msg)) {
726 *mp = xdrmbuf_getall(&xdrs);
733 * The socket upcall calls xprt_active() which will eventually
734 * cause the server to call us here. We attempt to
735 * read as much as possible from the socket and put
736 * the result in cd->mpending. If the read fails,
737 * we have drained both cd->mpending and the socket so
738 * we can call xprt_inactive().
740 uio.uio_resid = 1000000000;
741 uio.uio_td = curthread;
743 rcvflag = MSG_DONTWAIT;
744 error = soreceive(so, NULL, &uio, &m, NULL, &rcvflag);
746 if (error == EWOULDBLOCK) {
748 * We must re-test for readability after
749 * taking the lock to protect us in the case
750 * where a new packet arrives on the socket
751 * after our call to soreceive fails with
754 SOCKBUF_LOCK(&so->so_rcv);
756 xprt_inactive_self(xprt);
757 SOCKBUF_UNLOCK(&so->so_rcv);
758 sx_xunlock(&xprt->xp_lock);
763 SOCKBUF_LOCK(&so->so_rcv);
764 if (xprt->xp_upcallset) {
765 xprt->xp_upcallset = 0;
766 soupcall_clear(so, SO_RCV);
768 SOCKBUF_UNLOCK(&so->so_rcv);
769 xprt_inactive_self(xprt);
770 cd->strm_stat = XPRT_DIED;
771 sx_xunlock(&xprt->xp_lock);
777 * EOF - the other end has closed the socket.
779 xprt_inactive_self(xprt);
780 cd->strm_stat = XPRT_DIED;
781 sx_xunlock(&xprt->xp_lock);
786 m_last(cd->mpending)->m_next = m;
793 svc_vc_backchannel_recv(SVCXPRT *xprt, struct rpc_msg *msg,
794 struct sockaddr **addrp, struct mbuf **mp)
796 struct cf_conn *cd = (struct cf_conn *) xprt->xp_p1;
801 sx_xlock(&xprt->xp_lock);
802 ct = (struct ct_data *)xprt->xp_p2;
804 sx_xunlock(&xprt->xp_lock);
807 mtx_lock(&ct->ct_lock);
810 xprt_inactive_self(xprt);
811 mtx_unlock(&ct->ct_lock);
812 sx_xunlock(&xprt->xp_lock);
815 cd->mreq = m->m_nextpkt;
816 mtx_unlock(&ct->ct_lock);
817 sx_xunlock(&xprt->xp_lock);
819 xdrmbuf_create(&xdrs, m, XDR_DECODE);
820 if (! xdr_callmsg(&xdrs, msg)) {
825 *mp = xdrmbuf_getall(&xdrs);
831 svc_vc_reply(SVCXPRT *xprt, struct rpc_msg *msg,
832 struct sockaddr *addr, struct mbuf *m, uint32_t *seq)
840 * Leave space for record mark.
842 mrep = m_gethdr(M_WAITOK, MT_DATA);
843 mrep->m_data += sizeof(uint32_t);
845 xdrmbuf_create(&xdrs, mrep, XDR_ENCODE);
847 if (msg->rm_reply.rp_stat == MSG_ACCEPTED &&
848 msg->rm_reply.rp_acpt.ar_stat == SUCCESS) {
849 if (!xdr_replymsg(&xdrs, msg))
852 xdrmbuf_append(&xdrs, m);
854 stat = xdr_replymsg(&xdrs, msg);
861 * Prepend a record marker containing the reply length.
863 M_PREPEND(mrep, sizeof(uint32_t), M_WAITOK);
864 len = mrep->m_pkthdr.len;
865 *mtod(mrep, uint32_t *) =
866 htonl(0x80000000 | (len - sizeof(uint32_t)));
867 atomic_add_32(&xprt->xp_snd_cnt, len);
868 error = sosend(xprt->xp_socket, NULL, NULL, mrep, NULL,
871 atomic_add_rel_32(&xprt->xp_snt_cnt, len);
873 *seq = xprt->xp_snd_cnt;
876 atomic_subtract_32(&xprt->xp_snd_cnt, len);
887 svc_vc_backchannel_reply(SVCXPRT *xprt, struct rpc_msg *msg,
888 struct sockaddr *addr, struct mbuf *m, uint32_t *seq)
897 * Leave space for record mark.
899 mrep = m_gethdr(M_WAITOK, MT_DATA);
900 mrep->m_data += sizeof(uint32_t);
902 xdrmbuf_create(&xdrs, mrep, XDR_ENCODE);
904 if (msg->rm_reply.rp_stat == MSG_ACCEPTED &&
905 msg->rm_reply.rp_acpt.ar_stat == SUCCESS) {
906 if (!xdr_replymsg(&xdrs, msg))
909 xdrmbuf_append(&xdrs, m);
911 stat = xdr_replymsg(&xdrs, msg);
918 * Prepend a record marker containing the reply length.
920 M_PREPEND(mrep, sizeof(uint32_t), M_WAITOK);
921 *mtod(mrep, uint32_t *) =
922 htonl(0x80000000 | (mrep->m_pkthdr.len
923 - sizeof(uint32_t)));
924 sx_xlock(&xprt->xp_lock);
925 ct = (struct ct_data *)xprt->xp_p2;
927 error = sosend(ct->ct_socket, NULL, NULL, mrep, NULL,
931 sx_xunlock(&xprt->xp_lock);
952 svc_vc_soupcall(struct socket *so, void *arg, int waitflag)
954 SVCXPRT *xprt = (SVCXPRT *) arg;
956 if (soreadable(xprt->xp_socket))
963 * Get the effective UID of the sending process. Used by rpcbind, keyserv
964 * and rpc.yppasswdd on AF_LOCAL.
967 __rpc_get_local_uid(SVCXPRT *transp, uid_t *uid) {
973 sock = transp->xp_fd;
974 sa = (struct sockaddr *)transp->xp_rtaddr;
975 if (sa->sa_family == AF_LOCAL) {
976 ret = getpeereid(sock, &euid, &egid);