Home | History | Annotate | Line # | Download | only in rpc
svc_vc.c revision 1.8
      1 /*	$NetBSD: svc_vc.c,v 1.8 2001/01/04 14:57:17 lukem Exp $	*/
      2 
      3 /*
      4  * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
      5  * unrestricted use provided that this legend is included on all tape
      6  * media and as a part of the software program in whole or part.  Users
      7  * may copy or modify Sun RPC without charge, but are not authorized
      8  * to license or distribute it to anyone else except as part of a product or
      9  * program developed by the user.
     10  *
     11  * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
     12  * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
     13  * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
     14  *
     15  * Sun RPC is provided with no support and without any obligation on the
     16  * part of Sun Microsystems, Inc. to assist in its use, correction,
     17  * modification or enhancement.
     18  *
     19  * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
     20  * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
     21  * OR ANY PART THEREOF.
     22  *
     23  * In no event will Sun Microsystems, Inc. be liable for any lost revenue
     24  * or profits or other special, indirect and consequential damages, even if
     25  * Sun has been advised of the possibility of such damages.
     26  *
     27  * Sun Microsystems, Inc.
     28  * 2550 Garcia Avenue
     29  * Mountain View, California  94043
     30  */
     31 
     32 #include <sys/cdefs.h>
     33 #if defined(LIBC_SCCS) && !defined(lint)
     34 #if 0
     35 static char *sccsid = "@(#)svc_tcp.c 1.21 87/08/11 Copyr 1984 Sun Micro";
     36 static char *sccsid = "@(#)svc_tcp.c	2.2 88/08/01 4.0 RPCSRC";
     37 #else
     38 __RCSID("$NetBSD: svc_vc.c,v 1.8 2001/01/04 14:57:17 lukem Exp $");
     39 #endif
     40 #endif
     41 
     42 /*
     43  * svc_vc.c, Server side for Connection Oriented based RPC.
     44  *
     45  * Actually implements two flavors of transporter -
     46  * a tcp rendezvouser (a listner and connection establisher)
     47  * and a record/tcp stream.
     48  */
     49 
     50 #include "namespace.h"
     51 #include "reentrant.h"
     52 #include <sys/types.h>
     53 #include <sys/param.h>
     54 #include <sys/poll.h>
     55 #include <sys/socket.h>
     56 #include <sys/un.h>
     57 #include <netinet/in.h>
     58 #include <netinet/tcp.h>
     59 
     60 #include <assert.h>
     61 #include <err.h>
     62 #include <errno.h>
     63 #include <stdio.h>
     64 #include <stdlib.h>
     65 #include <string.h>
     66 #include <unistd.h>
     67 
     68 #include <rpc/rpc.h>
     69 
     70 #include "rpc_com.h"
     71 
     72 #ifdef __weak_alias
     73 __weak_alias(svc_fd_create,_svc_fd_create)
     74 __weak_alias(svc_vc_create,_svc_vc_create)
     75 #endif
     76 
     77 static SVCXPRT *makefd_xprt __P((int, u_int, u_int));
     78 static bool_t rendezvous_request __P((SVCXPRT *, struct rpc_msg *));
     79 static enum xprt_stat rendezvous_stat __P((SVCXPRT *));
     80 static void svc_vc_destroy __P((SVCXPRT *));
     81 static int read_vc __P((caddr_t, caddr_t, int));
     82 static int write_vc __P((caddr_t, caddr_t, int));
     83 static enum xprt_stat svc_vc_stat __P((SVCXPRT *));
     84 static bool_t svc_vc_recv __P((SVCXPRT *, struct rpc_msg *));
     85 static bool_t svc_vc_getargs __P((SVCXPRT *, xdrproc_t, caddr_t));
     86 static bool_t svc_vc_freeargs __P((SVCXPRT *, xdrproc_t, caddr_t));
     87 static bool_t svc_vc_reply __P((SVCXPRT *, struct rpc_msg *));
     88 static void svc_vc_rendezvous_ops __P((SVCXPRT *));
     89 static void svc_vc_ops __P((SVCXPRT *));
     90 static bool_t svc_vc_control __P((SVCXPRT *xprt, const u_int rq, void *in));
     91 
     92 struct cf_rendezvous { /* kept in xprt->xp_p1 for rendezvouser */
     93 	u_int sendsize;
     94 	u_int recvsize;
     95 };
     96 
     97 struct cf_conn {  /* kept in xprt->xp_p1 for actual connection */
     98 	enum xprt_stat strm_stat;
     99 	u_int32_t x_id;
    100 	XDR xdrs;
    101 	char verf_body[MAX_AUTH_BYTES];
    102 };
    103 
    104 /*
    105  * Usage:
    106  *	xprt = svc_vc_create(sock, send_buf_size, recv_buf_size);
    107  *
    108  * Creates, registers, and returns a (rpc) tcp based transporter.
    109  * Once *xprt is initialized, it is registered as a transporter
    110  * see (svc.h, xprt_register).  This routine returns
    111  * a NULL if a problem occurred.
    112  *
    113  * The filedescriptor passed in is expected to refer to a bound, but
    114  * not yet connected socket.
    115  *
    116  * Since streams do buffered io similar to stdio, the caller can specify
    117  * how big the send and receive buffers are via the second and third parms;
    118  * 0 => use the system default.
    119  */
    120 SVCXPRT *
    121 svc_vc_create(fd, sendsize, recvsize)
    122 	int fd;
    123 	u_int sendsize;
    124 	u_int recvsize;
    125 {
    126 	SVCXPRT *xprt;
    127 	struct cf_rendezvous *r = NULL;
    128 	struct __rpc_sockinfo si;
    129 	struct sockaddr_storage sslocal;
    130 	socklen_t slen;
    131 	int one = 1;
    132 
    133 	r = mem_alloc(sizeof(*r));
    134 	if (r == NULL) {
    135 		warnx("svc_vc_create: out of memory");
    136 		goto cleanup_svc_vc_create;
    137 	}
    138 	if (!__rpc_fd2sockinfo(fd, &si))
    139 		return NULL;
    140 	r->sendsize = __rpc_get_t_size(si.si_af, si.si_proto, (int)sendsize);
    141 	r->recvsize = __rpc_get_t_size(si.si_af, si.si_proto, (int)recvsize);
    142 	xprt = mem_alloc(sizeof(SVCXPRT));
    143 	if (xprt == NULL) {
    144 		warnx("svc_vc_create: out of memory");
    145 		goto cleanup_svc_vc_create;
    146 	}
    147 	xprt->xp_tp = NULL;
    148 	xprt->xp_p1 = (caddr_t)(void *)r;
    149 	xprt->xp_p2 = NULL;
    150 	xprt->xp_p3 = NULL;
    151 	xprt->xp_verf = _null_auth;
    152 	svc_vc_rendezvous_ops(xprt);
    153 	xprt->xp_port = (u_short)-1;	/* It is the rendezvouser */
    154 	xprt->xp_fd = fd;
    155 
    156 	slen = sizeof (struct sockaddr_storage);
    157 	if (getsockname(fd, (struct sockaddr *)(void *)&sslocal, &slen) < 0) {
    158 		warnx("svc_vc_create: could not retrieve local addr");
    159 		goto cleanup_svc_vc_create;
    160 	}
    161 
    162 	/*
    163 	 * We want to be able to check credentials on local sockets.
    164 	 */
    165 	if (sslocal.ss_family == AF_LOCAL)
    166 		if (setsockopt(fd, 0, LOCAL_CREDS, &one, sizeof one) < 0)
    167 			goto cleanup_svc_vc_create;
    168 
    169 	xprt->xp_ltaddr.maxlen = xprt->xp_ltaddr.len = sslocal.ss_len;
    170 	xprt->xp_ltaddr.buf = mem_alloc((size_t)sslocal.ss_len);
    171 	if (xprt->xp_ltaddr.buf == NULL) {
    172 		warnx("svc_vc_create: no mem for local addr");
    173 		goto cleanup_svc_vc_create;
    174 	}
    175 	memcpy(xprt->xp_ltaddr.buf, &sslocal, (size_t)sslocal.ss_len);
    176 
    177 	xprt->xp_rtaddr.maxlen = sizeof (struct sockaddr_storage);
    178 	xprt_register(xprt);
    179 	return (xprt);
    180 cleanup_svc_vc_create:
    181 	if (r != NULL)
    182 		mem_free(r, sizeof(*r));
    183 	return (NULL);
    184 }
    185 
    186 /*
    187  * Like svtcp_create(), except the routine takes any *open* UNIX file
    188  * descriptor as its first input.
    189  */
    190 SVCXPRT *
    191 svc_fd_create(fd, sendsize, recvsize)
    192 	int fd;
    193 	u_int sendsize;
    194 	u_int recvsize;
    195 {
    196 	struct sockaddr_storage ss;
    197 	socklen_t slen;
    198 	SVCXPRT *ret;
    199 
    200 	_DIAGASSERT(fd != -1);
    201 
    202 	ret = makefd_xprt(fd, sendsize, recvsize);
    203 	if (ret == NULL)
    204 		return NULL;
    205 
    206 	slen = sizeof (struct sockaddr_storage);
    207 	if (getsockname(fd, (struct sockaddr *)(void *)&ss, &slen) < 0) {
    208 		warnx("svc_fd_create: could not retrieve local addr");
    209 		goto freedata;
    210 	}
    211 	ret->xp_ltaddr.maxlen = ret->xp_ltaddr.len = ss.ss_len;
    212 	ret->xp_ltaddr.buf = mem_alloc((size_t)ss.ss_len);
    213 	if (ret->xp_ltaddr.buf == NULL) {
    214 		warnx("svc_fd_create: no mem for local addr");
    215 		goto freedata;
    216 	}
    217 	memcpy(ret->xp_ltaddr.buf, &ss, (size_t)ss.ss_len);
    218 
    219 	slen = sizeof (struct sockaddr_storage);
    220 	if (getpeername(fd, (struct sockaddr *)(void *)&ss, &slen) < 0) {
    221 		warnx("svc_fd_create: could not retrieve remote addr");
    222 		goto freedata;
    223 	}
    224 	ret->xp_rtaddr.maxlen = ret->xp_rtaddr.len = ss.ss_len;
    225 	ret->xp_rtaddr.buf = mem_alloc((size_t)ss.ss_len);
    226 	if (ret->xp_rtaddr.buf == NULL) {
    227 		warnx("svc_fd_create: no mem for local addr");
    228 		goto freedata;
    229 	}
    230 	memcpy(ret->xp_rtaddr.buf, &ss, (size_t)ss.ss_len);
    231 #ifdef PORTMAP
    232 	if (ss.ss_family == AF_INET) {
    233 		ret->xp_raddr = *(struct sockaddr_in *)ret->xp_rtaddr.buf;
    234 		ret->xp_addrlen = sizeof (struct sockaddr_in);
    235 	}
    236 #endif
    237 
    238 	return ret;
    239 
    240 freedata:
    241 	if (ret->xp_ltaddr.buf != NULL)
    242 		mem_free(ret->xp_ltaddr.buf, rep->xp_ltaddr.maxlen);
    243 
    244 	return NULL;
    245 }
    246 
    247 static SVCXPRT *
    248 makefd_xprt(fd, sendsize, recvsize)
    249 	int fd;
    250 	u_int sendsize;
    251 	u_int recvsize;
    252 {
    253 	SVCXPRT *xprt;
    254 	struct cf_conn *cd;
    255 	const char *netid;
    256 	struct __rpc_sockinfo si;
    257 
    258 	_DIAGASSERT(fd != -1);
    259 
    260 	xprt = mem_alloc(sizeof(SVCXPRT));
    261 	if (xprt == NULL) {
    262 		warnx("svc_vc: makefd_xprt: out of memory");
    263 		goto done;
    264 	}
    265 	memset(xprt, 0, sizeof *xprt);
    266 	cd = mem_alloc(sizeof(struct cf_conn));
    267 	if (cd == NULL) {
    268 		warnx("svc_tcp: makefd_xprt: out of memory");
    269 		mem_free(xprt, sizeof(SVCXPRT));
    270 		xprt = NULL;
    271 		goto done;
    272 	}
    273 	cd->strm_stat = XPRT_IDLE;
    274 	xdrrec_create(&(cd->xdrs), sendsize, recvsize,
    275 	    (caddr_t)(void *)xprt, read_vc, write_vc);
    276 	xprt->xp_p1 = (caddr_t)(void *)cd;
    277 	xprt->xp_verf.oa_base = cd->verf_body;
    278 	svc_vc_ops(xprt);  /* truely deals with calls */
    279 	xprt->xp_port = 0;  /* this is a connection, not a rendezvouser */
    280 	xprt->xp_fd = fd;
    281 	if (__rpc_fd2sockinfo(fd, &si) && __rpc_sockinfo2netid(&si, &netid))
    282 		xprt->xp_netid = strdup(netid);
    283 
    284 	xprt_register(xprt);
    285 done:
    286 	return (xprt);
    287 }
    288 
    289 /*ARGSUSED*/
    290 static bool_t
    291 rendezvous_request(xprt, msg)
    292 	SVCXPRT *xprt;
    293 	struct rpc_msg *msg;
    294 {
    295 	int sock;
    296 	struct cf_rendezvous *r;
    297 	struct sockaddr_storage addr;
    298 	socklen_t len;
    299 	struct __rpc_sockinfo si;
    300 
    301 	_DIAGASSERT(xprt != NULL);
    302 	_DIAGASSERT(msg != NULL);
    303 
    304 	r = (struct cf_rendezvous *)xprt->xp_p1;
    305 again:
    306 	len = sizeof addr;
    307 	if ((sock = accept(xprt->xp_fd, (struct sockaddr *)(void *)&addr,
    308 	    &len)) < 0) {
    309 		if (errno == EINTR)
    310 			goto again;
    311 	       return (FALSE);
    312 	}
    313 	/*
    314 	 * make a new transporter (re-uses xprt)
    315 	 */
    316 	xprt = makefd_xprt(sock, r->sendsize, r->recvsize);
    317 	xprt->xp_rtaddr.buf = mem_alloc(len);
    318 	if (xprt->xp_rtaddr.buf == NULL)
    319 		return (FALSE);
    320 	memcpy(xprt->xp_rtaddr.buf, &addr, len);
    321 	xprt->xp_rtaddr.len = len;
    322 #ifdef PORTMAP
    323 	if (addr.ss_family == AF_INET) {
    324 		xprt->xp_raddr = *(struct sockaddr_in *)xprt->xp_rtaddr.buf;
    325 		xprt->xp_addrlen = sizeof (struct sockaddr_in);
    326 	}
    327 #endif
    328 	if (__rpc_fd2sockinfo(sock, &si) && si.si_proto == IPPROTO_TCP) {
    329 		len = 1;
    330 		/* XXX fvdl - is this useful? */
    331 		setsockopt(sock, IPPROTO_TCP, TCP_NODELAY, &len, sizeof (len));
    332 	}
    333 	return (FALSE); /* there is never an rpc msg to be processed */
    334 }
    335 
    336 /*ARGSUSED*/
    337 static enum xprt_stat
    338 rendezvous_stat(xprt)
    339 	SVCXPRT *xprt;
    340 {
    341 
    342 	return (XPRT_IDLE);
    343 }
    344 
    345 static void
    346 svc_vc_destroy(xprt)
    347 	SVCXPRT *xprt;
    348 {
    349 	struct cf_conn *cd;
    350 	struct cf_rendezvous *r;
    351 
    352 	_DIAGASSERT(xprt != NULL);
    353 
    354 	cd = (struct cf_conn *)xprt->xp_p1;
    355 
    356 	xprt_unregister(xprt);
    357 	if (xprt->xp_fd != RPC_ANYFD)
    358 		(void)close(xprt->xp_fd);
    359 	if (xprt->xp_port != 0) {
    360 		/* a rendezvouser socket */
    361 		r = (struct cf_rendezvous *)xprt->xp_p1;
    362 		mem_free(r, sizeof (struct cf_rendezvous));
    363 		xprt->xp_port = 0;
    364 	} else {
    365 		/* an actual connection socket */
    366 		XDR_DESTROY(&(cd->xdrs));
    367 		mem_free(cd, sizeof(struct cf_conn));
    368 	}
    369 	if (xprt->xp_rtaddr.buf)
    370 		mem_free(xprt->xp_rtaddr.buf, xprt->xp_rtaddr.maxlen);
    371 	if (xprt->xp_ltaddr.buf)
    372 		mem_free(xprt->xp_ltaddr.buf, xprt->xp_ltaddr.maxlen);
    373 	if (xprt->xp_tp)
    374 		free(xprt->xp_tp);
    375 	if (xprt->xp_netid)
    376 		free(xprt->xp_netid);
    377 	mem_free(xprt, sizeof(SVCXPRT));
    378 }
    379 
    380 /*ARGSUSED*/
    381 static bool_t
    382 svc_vc_control(xprt, rq, in)
    383 	SVCXPRT *xprt;
    384 	const u_int rq;
    385 	void *in;
    386 {
    387 	return (FALSE);
    388 }
    389 
    390 /*
    391  * reads data from the tcp conection.
    392  * any error is fatal and the connection is closed.
    393  * (And a read of zero bytes is a half closed stream => error.)
    394  * All read operations timeout after 35 seconds.  A timeout is
    395  * fatal for the connection.
    396  */
    397 static int
    398 read_vc(xprtp, buf, len)
    399 	caddr_t xprtp;
    400 	caddr_t buf;
    401 	int len;
    402 {
    403 	SVCXPRT *xprt;
    404 	int sock;
    405 	int milliseconds = 35 * 1000;
    406 	struct pollfd pollfd;
    407 	struct sockaddr *sa;
    408 	struct msghdr msg;
    409 	struct cmsghdr *cmp;
    410 	void *crmsg = NULL;
    411 	struct sockcred *sc;
    412 	socklen_t crmsgsize;
    413 
    414 	xprt = (SVCXPRT *)(void *)xprtp;
    415 	_DIAGASSERT(xprt != NULL);
    416 
    417 	sock = xprt->xp_fd;
    418 
    419 	sa = (struct sockaddr *)xprt->xp_rtaddr.buf;
    420 	if (sa->sa_family == AF_LOCAL && xprt->xp_p2 == NULL) {
    421 		memset(&msg, 0, sizeof msg);
    422 		crmsgsize = CMSG_SPACE(SOCKCREDSIZE(NGROUPS));
    423 		crmsg = malloc(crmsgsize);
    424 		if (crmsg == NULL)
    425 			goto fatal_err;
    426 		memset(crmsg, 0, crmsgsize);
    427 
    428 		msg.msg_control = crmsg;
    429 		msg.msg_controllen = crmsgsize;
    430 
    431 		if (recvmsg(sock, &msg, 0) < 0)
    432 			goto fatal_err;
    433 
    434 		if (msg.msg_controllen == 0 ||
    435 		    (msg.msg_flags & MSG_CTRUNC) != 0)
    436 			goto fatal_err;
    437 
    438 		cmp = CMSG_FIRSTHDR(&msg);
    439 		if (cmp->cmsg_level != SOL_SOCKET ||
    440 		    cmp->cmsg_type != SCM_CREDS)
    441 			goto fatal_err;
    442 
    443 		sc = (struct sockcred *)(void *)CMSG_DATA(cmp);
    444 
    445 		xprt->xp_p2 = mem_alloc(SOCKCREDSIZE(sc->sc_ngroups));
    446 		if (xprt->xp_p2 == NULL)
    447 			goto fatal_err;
    448 
    449 		memcpy(xprt->xp_p2, sc, SOCKCREDSIZE(sc->sc_ngroups));
    450 		free(crmsg);
    451 		crmsg = NULL;
    452 	}
    453 
    454 	do {
    455 		pollfd.fd = sock;
    456 		pollfd.events = POLLIN;
    457 		switch (poll(&pollfd, 1, milliseconds)) {
    458 		case -1:
    459 			if (errno == EINTR) {
    460 				continue;
    461 			}
    462 			/*FALLTHROUGH*/
    463 		case 0:
    464 			goto fatal_err;
    465 
    466 		default:
    467 			break;
    468 		}
    469 	} while ((pollfd.revents & POLLIN) == 0);
    470 
    471 	if ((len = read(sock, buf, (size_t)len)) > 0)
    472 		return (len);
    473 
    474 fatal_err:
    475 	if (crmsg != NULL)
    476 		free(crmsg);
    477 	((struct cf_conn *)(xprt->xp_p1))->strm_stat = XPRT_DIED;
    478 	return (-1);
    479 }
    480 
    481 /*
    482  * writes data to the tcp connection.
    483  * Any error is fatal and the connection is closed.
    484  */
    485 static int
    486 write_vc(xprtp, buf, len)
    487 	caddr_t xprtp;
    488 	caddr_t buf;
    489 	int len;
    490 {
    491 	SVCXPRT *xprt;
    492 	int i, cnt;
    493 
    494 	xprt = (SVCXPRT *)(void *)xprtp;
    495 	_DIAGASSERT(xprt != NULL);
    496 
    497 	for (cnt = len; cnt > 0; cnt -= i, buf += i) {
    498 		if ((i = write(xprt->xp_fd, buf, (size_t)cnt)) < 0) {
    499 			((struct cf_conn *)(xprt->xp_p1))->strm_stat =
    500 			    XPRT_DIED;
    501 			return (-1);
    502 		}
    503 	}
    504 	return (len);
    505 }
    506 
    507 static enum xprt_stat
    508 svc_vc_stat(xprt)
    509 	SVCXPRT *xprt;
    510 {
    511 	struct cf_conn *cd;
    512 
    513 	_DIAGASSERT(xprt != NULL);
    514 
    515 	cd = (struct cf_conn *)(xprt->xp_p1);
    516 
    517 	if (cd->strm_stat == XPRT_DIED)
    518 		return (XPRT_DIED);
    519 	if (! xdrrec_eof(&(cd->xdrs)))
    520 		return (XPRT_MOREREQS);
    521 	return (XPRT_IDLE);
    522 }
    523 
    524 static bool_t
    525 svc_vc_recv(xprt, msg)
    526 	SVCXPRT *xprt;
    527 	struct rpc_msg *msg;
    528 {
    529 	struct cf_conn *cd;
    530 	XDR *xdrs;
    531 
    532 	_DIAGASSERT(xprt != NULL);
    533 	_DIAGASSERT(msg != NULL);
    534 
    535 	cd = (struct cf_conn *)(xprt->xp_p1);
    536 	xdrs = &(cd->xdrs);
    537 
    538 	xdrs->x_op = XDR_DECODE;
    539 	(void)xdrrec_skiprecord(xdrs);
    540 	if (xdr_callmsg(xdrs, msg)) {
    541 		cd->x_id = msg->rm_xid;
    542 		return (TRUE);
    543 	}
    544 	cd->strm_stat = XPRT_DIED;
    545 	return (FALSE);
    546 }
    547 
    548 static bool_t
    549 svc_vc_getargs(xprt, xdr_args, args_ptr)
    550 	SVCXPRT *xprt;
    551 	xdrproc_t xdr_args;
    552 	caddr_t args_ptr;
    553 {
    554 
    555 	_DIAGASSERT(xprt != NULL);
    556 	/* args_ptr may be NULL */
    557 
    558 	return ((*xdr_args)(&(((struct cf_conn *)(xprt->xp_p1))->xdrs),
    559 	    args_ptr));
    560 }
    561 
    562 static bool_t
    563 svc_vc_freeargs(xprt, xdr_args, args_ptr)
    564 	SVCXPRT *xprt;
    565 	xdrproc_t xdr_args;
    566 	caddr_t args_ptr;
    567 {
    568 	XDR *xdrs;
    569 
    570 	_DIAGASSERT(xprt != NULL);
    571 	/* args_ptr may be NULL */
    572 
    573 	xdrs = &(((struct cf_conn *)(xprt->xp_p1))->xdrs);
    574 
    575 	xdrs->x_op = XDR_FREE;
    576 	return ((*xdr_args)(xdrs, args_ptr));
    577 }
    578 
    579 static bool_t
    580 svc_vc_reply(xprt, msg)
    581 	SVCXPRT *xprt;
    582 	struct rpc_msg *msg;
    583 {
    584 	struct cf_conn *cd;
    585 	XDR *xdrs;
    586 	bool_t stat;
    587 
    588 	_DIAGASSERT(xprt != NULL);
    589 	_DIAGASSERT(msg != NULL);
    590 
    591 	cd = (struct cf_conn *)(xprt->xp_p1);
    592 	xdrs = &(cd->xdrs);
    593 
    594 	xdrs->x_op = XDR_ENCODE;
    595 	msg->rm_xid = cd->x_id;
    596 	stat = xdr_replymsg(xdrs, msg);
    597 	(void)xdrrec_endofrecord(xdrs, TRUE);
    598 	return (stat);
    599 }
    600 
    601 static void
    602 svc_vc_ops(xprt)
    603 	SVCXPRT *xprt;
    604 {
    605 	static struct xp_ops ops;
    606 	static struct xp_ops2 ops2;
    607 #ifdef __REENT
    608 	extern mutex_t ops_lock;
    609 #endif
    610 
    611 /* VARIABLES PROTECTED BY ops_lock: ops, ops2 */
    612 
    613 	mutex_lock(&ops_lock);
    614 	if (ops.xp_recv == NULL) {
    615 		ops.xp_recv = svc_vc_recv;
    616 		ops.xp_stat = svc_vc_stat;
    617 		ops.xp_getargs = svc_vc_getargs;
    618 		ops.xp_reply = svc_vc_reply;
    619 		ops.xp_freeargs = svc_vc_freeargs;
    620 		ops.xp_destroy = svc_vc_destroy;
    621 		ops2.xp_control = svc_vc_control;
    622 	}
    623 	xprt->xp_ops = &ops;
    624 	xprt->xp_ops2 = &ops2;
    625 	mutex_unlock(&ops_lock);
    626 }
    627 
    628 static void
    629 svc_vc_rendezvous_ops(xprt)
    630 	SVCXPRT *xprt;
    631 {
    632 	static struct xp_ops ops;
    633 	static struct xp_ops2 ops2;
    634 #ifdef __REENT
    635 	extern mutex_t ops_lock;
    636 #endif
    637 
    638 	mutex_lock(&ops_lock);
    639 	if (ops.xp_recv == NULL) {
    640 		ops.xp_recv = rendezvous_request;
    641 		ops.xp_stat = rendezvous_stat;
    642 		ops.xp_getargs =
    643 		    (bool_t (*) __P((SVCXPRT *, xdrproc_t, caddr_t)))abort;
    644 		ops.xp_reply =
    645 		    (bool_t (*) __P((SVCXPRT *, struct rpc_msg *)))abort;
    646 		ops.xp_freeargs =
    647 		    (bool_t (*) __P((SVCXPRT *, xdrproc_t, caddr_t)))abort,
    648 		ops.xp_destroy = svc_vc_destroy;
    649 		ops2.xp_control = svc_vc_control;
    650 	}
    651 	xprt->xp_ops = &ops;
    652 	xprt->xp_ops2 = &ops2;
    653 	mutex_unlock(&ops_lock);
    654 }
    655