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);
192 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)
206 SVCXPRT *xprt = NULL;
207 struct cf_conn *cd = NULL;
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:
283 sx_destroy(&xprt->xp_lock);
287 mem_free(cd, sizeof(*cd));
292 * Create a new transport for a backchannel on a clnt_vc socket.
295 svc_vc_create_backchannel(SVCPOOL *pool)
297 SVCXPRT *xprt = NULL;
298 struct cf_conn *cd = NULL;
300 cd = mem_alloc(sizeof(*cd));
301 cd->strm_stat = XPRT_IDLE;
303 xprt = svc_xprt_alloc();
304 sx_init(&xprt->xp_lock, "xprt->xp_lock");
305 xprt->xp_pool = pool;
306 xprt->xp_socket = NULL;
309 xprt->xp_ops = &svc_vc_backchannel_ops;
314 * This does all of the accept except the final call to soaccept. The
315 * caller will call soaccept after dropping its locks (soaccept may
319 svc_vc_accept(struct socket *head, struct socket **sop)
324 if ((head->so_options & SO_ACCEPTCONN) == 0) {
329 error = mac_socket_check_accept(curthread->td_ucred, head);
334 if (TAILQ_EMPTY(&head->so_comp)) {
339 so = TAILQ_FIRST(&head->so_comp);
340 KASSERT(!(so->so_qstate & SQ_INCOMP), ("svc_vc_accept: so SQ_INCOMP"));
341 KASSERT(so->so_qstate & SQ_COMP, ("svc_vc_accept: so not SQ_COMP"));
344 * Before changing the flags on the socket, we have to bump the
345 * reference count. Otherwise, if the protocol calls sofree(),
346 * the socket will be released due to a zero refcount.
347 * XXX might not need soref() since this is simpler than kern_accept.
349 SOCK_LOCK(so); /* soref() and so_state update */
350 soref(so); /* file descriptor reference */
352 TAILQ_REMOVE(&head->so_comp, so, so_list);
354 so->so_state |= (head->so_state & SS_NBIO);
355 so->so_qstate &= ~SQ_COMP;
363 /* connection has been removed from the listen queue */
364 KNOTE_UNLOCKED(&head->so_rcv.sb_sel.si_note, 0);
371 svc_vc_rendezvous_recv(SVCXPRT *xprt, struct rpc_msg *msg,
372 struct sockaddr **addrp, struct mbuf **mp)
374 struct socket *so = NULL;
375 struct sockaddr *sa = NULL;
380 * The socket upcall calls xprt_active() which will eventually
381 * cause the server to call us here. We attempt to accept a
382 * connection from the socket and turn it into a new
383 * transport. If the accept fails, we have drained all pending
384 * connections so we call xprt_inactive().
386 sx_xlock(&xprt->xp_lock);
388 error = svc_vc_accept(xprt->xp_socket, &so);
390 if (error == EWOULDBLOCK) {
392 * We must re-test for new connections after taking
393 * the lock to protect us in the case where a new
394 * connection arrives after our call to accept fails
398 if (TAILQ_EMPTY(&xprt->xp_socket->so_comp))
399 xprt_inactive_self(xprt);
401 sx_xunlock(&xprt->xp_lock);
406 SOCKBUF_LOCK(&xprt->xp_socket->so_rcv);
407 if (xprt->xp_upcallset) {
408 xprt->xp_upcallset = 0;
409 soupcall_clear(xprt->xp_socket, SO_RCV);
411 SOCKBUF_UNLOCK(&xprt->xp_socket->so_rcv);
412 xprt_inactive_self(xprt);
413 sx_xunlock(&xprt->xp_lock);
417 sx_xunlock(&xprt->xp_lock);
420 error = soaccept(so, &sa);
424 * XXX not sure if I need to call sofree or soclose here.
432 * svc_vc_create_conn will call xprt_register - we don't need
433 * to do anything with the new connection except derefence it.
435 new_xprt = svc_vc_create_conn(xprt->xp_pool, so, sa);
439 SVC_RELEASE(new_xprt);
444 return (FALSE); /* there is never an rpc msg to be processed */
448 static enum xprt_stat
449 svc_vc_rendezvous_stat(SVCXPRT *xprt)
456 svc_vc_destroy_common(SVCXPRT *xprt)
458 SOCKBUF_LOCK(&xprt->xp_socket->so_rcv);
459 if (xprt->xp_upcallset) {
460 xprt->xp_upcallset = 0;
461 soupcall_clear(xprt->xp_socket, SO_RCV);
463 SOCKBUF_UNLOCK(&xprt->xp_socket->so_rcv);
466 (void)soclose(xprt->xp_socket);
469 (void) mem_free(xprt->xp_netid, strlen(xprt->xp_netid) + 1);
474 svc_vc_rendezvous_destroy(SVCXPRT *xprt)
477 svc_vc_destroy_common(xprt);
481 svc_vc_destroy(SVCXPRT *xprt)
483 struct cf_conn *cd = (struct cf_conn *)xprt->xp_p1;
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 -= xprt->xp_socket->so_snd.sb_cc;
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_acq_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))
965 * Get the effective UID of the sending process. Used by rpcbind, keyserv
966 * and rpc.yppasswdd on AF_LOCAL.
969 __rpc_get_local_uid(SVCXPRT *transp, uid_t *uid) {
975 sock = transp->xp_fd;
976 sa = (struct sockaddr *)transp->xp_rtaddr;
977 if (sa->sa_family == AF_LOCAL) {
978 ret = getpeereid(sock, &euid, &egid);