1 /* $NetBSD: svc_vc.c,v 1.7 2000/08/03 00:01:53 fvdl 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 #if defined(LIBC_SCCS) && !defined(lint) 33 static char *sccsid2 = "@(#)svc_tcp.c 1.21 87/08/11 Copyr 1984 Sun Micro"; 34 static char *sccsid = "@(#)svc_tcp.c 2.2 88/08/01 4.0 RPCSRC"; 35 #endif 36 #include <sys/cdefs.h> 37 __FBSDID("$FreeBSD$"); 38 39 /* 40 * svc_vc.c, Server side for Connection Oriented based RPC. 41 * 42 * Actually implements two flavors of transporter - 43 * a tcp rendezvouser (a listner and connection establisher) 44 * and a record/tcp stream. 45 */ 46 47 #include <sys/param.h> 48 #include <sys/lock.h> 49 #include <sys/kernel.h> 50 #include <sys/malloc.h> 51 #include <sys/mbuf.h> 52 #include <sys/mutex.h> 53 #include <sys/proc.h> 54 #include <sys/protosw.h> 55 #include <sys/queue.h> 56 #include <sys/socket.h> 57 #include <sys/socketvar.h> 58 #include <sys/sx.h> 59 #include <sys/systm.h> 60 #include <sys/uio.h> 61 #include <netinet/tcp.h> 62 63 #include <rpc/rpc.h> 64 65 #include <rpc/rpc_com.h> 66 67 #include <security/mac/mac_framework.h> 68 69 static bool_t svc_vc_rendezvous_recv(SVCXPRT *, struct rpc_msg *, 70 struct sockaddr **, struct mbuf **); 71 static enum xprt_stat svc_vc_rendezvous_stat(SVCXPRT *); 72 static void svc_vc_rendezvous_destroy(SVCXPRT *); 73 static bool_t svc_vc_null(void); 74 static void svc_vc_destroy(SVCXPRT *); 75 static enum xprt_stat svc_vc_stat(SVCXPRT *); 76 static bool_t svc_vc_recv(SVCXPRT *, struct rpc_msg *, 77 struct sockaddr **, struct mbuf **); 78 static bool_t svc_vc_reply(SVCXPRT *, struct rpc_msg *, 79 struct sockaddr *, struct mbuf *); 80 static bool_t svc_vc_control(SVCXPRT *xprt, const u_int rq, void *in); 81 static bool_t svc_vc_rendezvous_control (SVCXPRT *xprt, const u_int rq, 82 void *in); 83 static SVCXPRT *svc_vc_create_conn(SVCPOOL *pool, struct socket *so, 84 struct sockaddr *raddr); 85 static int svc_vc_accept(struct socket *head, struct socket **sop); 86 static int svc_vc_soupcall(struct socket *so, void *arg, int waitflag); 87 88 static struct xp_ops svc_vc_rendezvous_ops = { 89 .xp_recv = svc_vc_rendezvous_recv, 90 .xp_stat = svc_vc_rendezvous_stat, 91 .xp_reply = (bool_t (*)(SVCXPRT *, struct rpc_msg *, 92 struct sockaddr *, struct mbuf *))svc_vc_null, 93 .xp_destroy = svc_vc_rendezvous_destroy, 94 .xp_control = svc_vc_rendezvous_control 95 }; 96 97 static struct xp_ops svc_vc_ops = { 98 .xp_recv = svc_vc_recv, 99 .xp_stat = svc_vc_stat, 100 .xp_reply = svc_vc_reply, 101 .xp_destroy = svc_vc_destroy, 102 .xp_control = svc_vc_control 103 }; 104 105 struct cf_conn { /* kept in xprt->xp_p1 for actual connection */ 106 enum xprt_stat strm_stat; 107 struct mbuf *mpending; /* unparsed data read from the socket */ 108 struct mbuf *mreq; /* current record being built from mpending */ 109 uint32_t resid; /* number of bytes needed for fragment */ 110 bool_t eor; /* reading last fragment of current record */ 111 }; 112 113 /* 114 * Usage: 115 * xprt = svc_vc_create(sock, send_buf_size, recv_buf_size); 116 * 117 * Creates, registers, and returns a (rpc) tcp based transporter. 118 * Once *xprt is initialized, it is registered as a transporter 119 * see (svc.h, xprt_register). This routine returns 120 * a NULL if a problem occurred. 121 * 122 * The filedescriptor passed in is expected to refer to a bound, but 123 * not yet connected socket. 124 * 125 * Since streams do buffered io similar to stdio, the caller can specify 126 * how big the send and receive buffers are via the second and third parms; 127 * 0 => use the system default. 128 */ 129 SVCXPRT * 130 svc_vc_create(SVCPOOL *pool, struct socket *so, size_t sendsize, 131 size_t recvsize) 132 { 133 SVCXPRT *xprt; 134 struct sockaddr* sa; 135 int error; 136 137 if (so->so_state & SS_ISCONNECTED) { 138 error = so->so_proto->pr_usrreqs->pru_peeraddr(so, &sa); 139 if (error) 140 return (NULL); 141 xprt = svc_vc_create_conn(pool, so, sa); 142 free(sa, M_SONAME); 143 return (xprt); 144 } 145 146 xprt = svc_xprt_alloc(); 147 sx_init(&xprt->xp_lock, "xprt->xp_lock"); 148 xprt->xp_pool = pool; 149 xprt->xp_socket = so; 150 xprt->xp_p1 = NULL; 151 xprt->xp_p2 = NULL; 152 xprt->xp_ops = &svc_vc_rendezvous_ops; 153 154 error = so->so_proto->pr_usrreqs->pru_sockaddr(so, &sa); 155 if (error) 156 goto cleanup_svc_vc_create; 157 158 memcpy(&xprt->xp_ltaddr, sa, sa->sa_len); 159 free(sa, M_SONAME); 160 161 xprt_register(xprt); 162 163 solisten(so, SOMAXCONN, curthread); 164 165 SOCKBUF_LOCK(&so->so_rcv); 166 xprt->xp_upcallset = 1; 167 soupcall_set(so, SO_RCV, svc_vc_soupcall, xprt); 168 SOCKBUF_UNLOCK(&so->so_rcv); 169 170 return (xprt); 171 cleanup_svc_vc_create: 172 if (xprt) 173 svc_xprt_free(xprt); 174 return (NULL); 175 } 176 177 /* 178 * Create a new transport for a socket optained via soaccept(). 179 */ 180 SVCXPRT * 181 svc_vc_create_conn(SVCPOOL *pool, struct socket *so, struct sockaddr *raddr) 182 { 183 SVCXPRT *xprt = NULL; 184 struct cf_conn *cd = NULL; 185 struct sockaddr* sa = NULL; 186 struct sockopt opt; 187 int one = 1; 188 int error; 189 190 bzero(&opt, sizeof(struct sockopt)); 191 opt.sopt_dir = SOPT_SET; 192 opt.sopt_level = SOL_SOCKET; 193 opt.sopt_name = SO_KEEPALIVE; 194 opt.sopt_val = &one; 195 opt.sopt_valsize = sizeof(one); 196 error = sosetopt(so, &opt); 197 if (error) 198 return (NULL); 199 200 if (so->so_proto->pr_protocol == IPPROTO_TCP) { 201 bzero(&opt, sizeof(struct sockopt)); 202 opt.sopt_dir = SOPT_SET; 203 opt.sopt_level = IPPROTO_TCP; 204 opt.sopt_name = TCP_NODELAY; 205 opt.sopt_val = &one; 206 opt.sopt_valsize = sizeof(one); 207 error = sosetopt(so, &opt); 208 if (error) 209 return (NULL); 210 } 211 212 cd = mem_alloc(sizeof(*cd)); 213 cd->strm_stat = XPRT_IDLE; 214 215 xprt = svc_xprt_alloc(); 216 sx_init(&xprt->xp_lock, "xprt->xp_lock"); 217 xprt->xp_pool = pool; 218 xprt->xp_socket = so; 219 xprt->xp_p1 = cd; 220 xprt->xp_p2 = NULL; 221 xprt->xp_ops = &svc_vc_ops; 222 223 /* 224 * See http://www.connectathon.org/talks96/nfstcp.pdf - client 225 * has a 5 minute timer, server has a 6 minute timer. 226 */ 227 xprt->xp_idletimeout = 6 * 60; 228 229 memcpy(&xprt->xp_rtaddr, raddr, raddr->sa_len); 230 231 error = so->so_proto->pr_usrreqs->pru_sockaddr(so, &sa); 232 if (error) 233 goto cleanup_svc_vc_create; 234 235 memcpy(&xprt->xp_ltaddr, sa, sa->sa_len); 236 free(sa, M_SONAME); 237 238 xprt_register(xprt); 239 240 SOCKBUF_LOCK(&so->so_rcv); 241 xprt->xp_upcallset = 1; 242 soupcall_set(so, SO_RCV, svc_vc_soupcall, xprt); 243 SOCKBUF_UNLOCK(&so->so_rcv); 244 245 /* 246 * Throw the transport into the active list in case it already 247 * has some data buffered. 248 */ 249 sx_xlock(&xprt->xp_lock); 250 xprt_active(xprt); 251 sx_xunlock(&xprt->xp_lock); 252 253 return (xprt); 254 cleanup_svc_vc_create: 255 if (xprt) { 256 mem_free(xprt, sizeof(*xprt)); 257 } 258 if (cd) 259 mem_free(cd, sizeof(*cd)); 260 return (NULL); 261 } 262 263 /* 264 * This does all of the accept except the final call to soaccept. The 265 * caller will call soaccept after dropping its locks (soaccept may 266 * call malloc). 267 */ 268 int 269 svc_vc_accept(struct socket *head, struct socket **sop) 270 { 271 int error = 0; 272 struct socket *so; 273 274 if ((head->so_options & SO_ACCEPTCONN) == 0) { 275 error = EINVAL; 276 goto done; 277 } 278 #ifdef MAC 279 error = mac_socket_check_accept(curthread->td_ucred, head); 280 if (error != 0) 281 goto done; 282 #endif 283 ACCEPT_LOCK(); 284 if (TAILQ_EMPTY(&head->so_comp)) { 285 ACCEPT_UNLOCK(); 286 error = EWOULDBLOCK; 287 goto done; 288 } 289 so = TAILQ_FIRST(&head->so_comp); 290 KASSERT(!(so->so_qstate & SQ_INCOMP), ("svc_vc_accept: so SQ_INCOMP")); 291 KASSERT(so->so_qstate & SQ_COMP, ("svc_vc_accept: so not SQ_COMP")); 292 293 /* 294 * Before changing the flags on the socket, we have to bump the 295 * reference count. Otherwise, if the protocol calls sofree(), 296 * the socket will be released due to a zero refcount. 297 * XXX might not need soref() since this is simpler than kern_accept. 298 */ 299 SOCK_LOCK(so); /* soref() and so_state update */ 300 soref(so); /* file descriptor reference */ 301 302 TAILQ_REMOVE(&head->so_comp, so, so_list); 303 head->so_qlen--; 304 so->so_state |= (head->so_state & SS_NBIO); 305 so->so_qstate &= ~SQ_COMP; 306 so->so_head = NULL; 307 308 SOCK_UNLOCK(so); 309 ACCEPT_UNLOCK(); 310 311 *sop = so; 312 313 /* connection has been removed from the listen queue */ 314 KNOTE_UNLOCKED(&head->so_rcv.sb_sel.si_note, 0); 315 done: 316 return (error); 317 } 318 319 /*ARGSUSED*/ 320 static bool_t 321 svc_vc_rendezvous_recv(SVCXPRT *xprt, struct rpc_msg *msg, 322 struct sockaddr **addrp, struct mbuf **mp) 323 { 324 struct socket *so = NULL; 325 struct sockaddr *sa = NULL; 326 int error; 327 SVCXPRT *new_xprt; 328 329 /* 330 * The socket upcall calls xprt_active() which will eventually 331 * cause the server to call us here. We attempt to accept a 332 * connection from the socket and turn it into a new 333 * transport. If the accept fails, we have drained all pending 334 * connections so we call xprt_inactive(). 335 */ 336 sx_xlock(&xprt->xp_lock); 337 338 error = svc_vc_accept(xprt->xp_socket, &so); 339 340 if (error == EWOULDBLOCK) { 341 /* 342 * We must re-test for new connections after taking 343 * the lock to protect us in the case where a new 344 * connection arrives after our call to accept fails 345 * with EWOULDBLOCK. The pool lock protects us from 346 * racing the upcall after our TAILQ_EMPTY() call 347 * returns false. 348 */ 349 ACCEPT_LOCK(); 350 mtx_lock(&xprt->xp_pool->sp_lock); 351 if (TAILQ_EMPTY(&xprt->xp_socket->so_comp)) 352 xprt_inactive_locked(xprt); 353 mtx_unlock(&xprt->xp_pool->sp_lock); 354 ACCEPT_UNLOCK(); 355 sx_xunlock(&xprt->xp_lock); 356 return (FALSE); 357 } 358 359 if (error) { 360 SOCKBUF_LOCK(&xprt->xp_socket->so_rcv); 361 if (xprt->xp_upcallset) { 362 xprt->xp_upcallset = 0; 363 soupcall_clear(xprt->xp_socket, SO_RCV); 364 } 365 SOCKBUF_UNLOCK(&xprt->xp_socket->so_rcv); 366 xprt_inactive(xprt); 367 sx_xunlock(&xprt->xp_lock); 368 return (FALSE); 369 } 370 371 sx_xunlock(&xprt->xp_lock); 372 373 sa = 0; 374 error = soaccept(so, &sa); 375 376 if (error) { 377 /* 378 * XXX not sure if I need to call sofree or soclose here. 379 */ 380 if (sa) 381 free(sa, M_SONAME); 382 return (FALSE); 383 } 384 385 /* 386 * svc_vc_create_conn will call xprt_register - we don't need 387 * to do anything with the new connection except derefence it. 388 */ 389 new_xprt = svc_vc_create_conn(xprt->xp_pool, so, sa); 390 if (!new_xprt) { 391 soclose(so); 392 } else { 393 SVC_RELEASE(new_xprt); 394 } 395 396 free(sa, M_SONAME); 397 398 return (FALSE); /* there is never an rpc msg to be processed */ 399 } 400 401 /*ARGSUSED*/ 402 static enum xprt_stat 403 svc_vc_rendezvous_stat(SVCXPRT *xprt) 404 { 405 406 return (XPRT_IDLE); 407 } 408 409 static void 410 svc_vc_destroy_common(SVCXPRT *xprt) 411 { 412 SOCKBUF_LOCK(&xprt->xp_socket->so_rcv); 413 if (xprt->xp_upcallset) { 414 xprt->xp_upcallset = 0; 415 soupcall_clear(xprt->xp_socket, SO_RCV); 416 } 417 SOCKBUF_UNLOCK(&xprt->xp_socket->so_rcv); 418 419 sx_destroy(&xprt->xp_lock); 420 if (xprt->xp_socket) 421 (void)soclose(xprt->xp_socket); 422 423 if (xprt->xp_netid) 424 (void) mem_free(xprt->xp_netid, strlen(xprt->xp_netid) + 1); 425 svc_xprt_free(xprt); 426 } 427 428 static void 429 svc_vc_rendezvous_destroy(SVCXPRT *xprt) 430 { 431 432 svc_vc_destroy_common(xprt); 433 } 434 435 static void 436 svc_vc_destroy(SVCXPRT *xprt) 437 { 438 struct cf_conn *cd = (struct cf_conn *)xprt->xp_p1; 439 440 svc_vc_destroy_common(xprt); 441 442 if (cd->mreq) 443 m_freem(cd->mreq); 444 if (cd->mpending) 445 m_freem(cd->mpending); 446 mem_free(cd, sizeof(*cd)); 447 } 448 449 /*ARGSUSED*/ 450 static bool_t 451 svc_vc_control(SVCXPRT *xprt, const u_int rq, void *in) 452 { 453 return (FALSE); 454 } 455 456 static bool_t 457 svc_vc_rendezvous_control(SVCXPRT *xprt, const u_int rq, void *in) 458 { 459 460 return (FALSE); 461 } 462 463 static enum xprt_stat 464 svc_vc_stat(SVCXPRT *xprt) 465 { 466 struct cf_conn *cd; 467 struct mbuf *m; 468 size_t n; 469 470 cd = (struct cf_conn *)(xprt->xp_p1); 471 472 if (cd->strm_stat == XPRT_DIED) 473 return (XPRT_DIED); 474 475 /* 476 * Return XPRT_MOREREQS if we have buffered data and we are 477 * mid-record or if we have enough data for a record 478 * marker. Since this is only a hint, we read mpending and 479 * resid outside the lock. We do need to take the lock if we 480 * have to traverse the mbuf chain. 481 */ 482 if (cd->mpending) { 483 if (cd->resid) 484 return (XPRT_MOREREQS); 485 n = 0; 486 sx_xlock(&xprt->xp_lock); 487 m = cd->mpending; 488 while (m && n < sizeof(uint32_t)) { 489 n += m->m_len; 490 m = m->m_next; 491 } 492 sx_xunlock(&xprt->xp_lock); 493 if (n >= sizeof(uint32_t)) 494 return (XPRT_MOREREQS); 495 } 496 497 if (soreadable(xprt->xp_socket)) 498 return (XPRT_MOREREQS); 499 500 return (XPRT_IDLE); 501 } 502 503 static bool_t 504 svc_vc_recv(SVCXPRT *xprt, struct rpc_msg *msg, 505 struct sockaddr **addrp, struct mbuf **mp) 506 { 507 struct cf_conn *cd = (struct cf_conn *) xprt->xp_p1; 508 struct uio uio; 509 struct mbuf *m; 510 XDR xdrs; 511 int error, rcvflag; 512 513 /* 514 * Serialise access to the socket and our own record parsing 515 * state. 516 */ 517 sx_xlock(&xprt->xp_lock); 518 519 for (;;) { 520 /* 521 * If we have an mbuf chain in cd->mpending, try to parse a 522 * record from it, leaving the result in cd->mreq. If we don't 523 * have a complete record, leave the partial result in 524 * cd->mreq and try to read more from the socket. 525 */ 526 if (cd->mpending) { 527 /* 528 * If cd->resid is non-zero, we have part of the 529 * record already, otherwise we are expecting a record 530 * marker. 531 */ 532 if (!cd->resid) { 533 /* 534 * See if there is enough data buffered to 535 * make up a record marker. Make sure we can 536 * handle the case where the record marker is 537 * split across more than one mbuf. 538 */ 539 size_t n = 0; 540 uint32_t header; 541 542 m = cd->mpending; 543 while (n < sizeof(uint32_t) && m) { 544 n += m->m_len; 545 m = m->m_next; 546 } 547 if (n < sizeof(uint32_t)) 548 goto readmore; 549 if (cd->mpending->m_len < sizeof(uint32_t)) 550 cd->mpending = m_pullup(cd->mpending, 551 sizeof(uint32_t)); 552 memcpy(&header, mtod(cd->mpending, uint32_t *), 553 sizeof(header)); 554 header = ntohl(header); 555 cd->eor = (header & 0x80000000) != 0; 556 cd->resid = header & 0x7fffffff; 557 m_adj(cd->mpending, sizeof(uint32_t)); 558 } 559 560 /* 561 * Start pulling off mbufs from cd->mpending 562 * until we either have a complete record or 563 * we run out of data. We use m_split to pull 564 * data - it will pull as much as possible and 565 * split the last mbuf if necessary. 566 */ 567 while (cd->mpending && cd->resid) { 568 m = cd->mpending; 569 if (cd->mpending->m_next 570 || cd->mpending->m_len > cd->resid) 571 cd->mpending = m_split(cd->mpending, 572 cd->resid, M_WAIT); 573 else 574 cd->mpending = NULL; 575 if (cd->mreq) 576 m_last(cd->mreq)->m_next = m; 577 else 578 cd->mreq = m; 579 while (m) { 580 cd->resid -= m->m_len; 581 m = m->m_next; 582 } 583 } 584 585 /* 586 * If cd->resid is zero now, we have managed to 587 * receive a record fragment from the stream. Check 588 * for the end-of-record mark to see if we need more. 589 */ 590 if (cd->resid == 0) { 591 if (!cd->eor) 592 continue; 593 594 /* 595 * Success - we have a complete record in 596 * cd->mreq. 597 */ 598 xdrmbuf_create(&xdrs, cd->mreq, XDR_DECODE); 599 cd->mreq = NULL; 600 sx_xunlock(&xprt->xp_lock); 601 602 if (! xdr_callmsg(&xdrs, msg)) { 603 XDR_DESTROY(&xdrs); 604 return (FALSE); 605 } 606 607 *addrp = NULL; 608 *mp = xdrmbuf_getall(&xdrs); 609 XDR_DESTROY(&xdrs); 610 611 return (TRUE); 612 } 613 } 614 615 readmore: 616 /* 617 * The socket upcall calls xprt_active() which will eventually 618 * cause the server to call us here. We attempt to 619 * read as much as possible from the socket and put 620 * the result in cd->mpending. If the read fails, 621 * we have drained both cd->mpending and the socket so 622 * we can call xprt_inactive(). 623 */ 624 uio.uio_resid = 1000000000; 625 uio.uio_td = curthread; 626 m = NULL; 627 rcvflag = MSG_DONTWAIT; 628 error = soreceive(xprt->xp_socket, NULL, &uio, &m, NULL, 629 &rcvflag); 630 631 if (error == EWOULDBLOCK) { 632 /* 633 * We must re-test for readability after 634 * taking the lock to protect us in the case 635 * where a new packet arrives on the socket 636 * after our call to soreceive fails with 637 * EWOULDBLOCK. The pool lock protects us from 638 * racing the upcall after our soreadable() 639 * call returns false. 640 */ 641 mtx_lock(&xprt->xp_pool->sp_lock); 642 if (!soreadable(xprt->xp_socket)) 643 xprt_inactive_locked(xprt); 644 mtx_unlock(&xprt->xp_pool->sp_lock); 645 sx_xunlock(&xprt->xp_lock); 646 return (FALSE); 647 } 648 649 if (error) { 650 SOCKBUF_LOCK(&xprt->xp_socket->so_rcv); 651 if (xprt->xp_upcallset) { 652 xprt->xp_upcallset = 0; 653 soupcall_clear(xprt->xp_socket, SO_RCV); 654 } 655 SOCKBUF_UNLOCK(&xprt->xp_socket->so_rcv); 656 xprt_inactive(xprt); 657 cd->strm_stat = XPRT_DIED; 658 sx_xunlock(&xprt->xp_lock); 659 return (FALSE); 660 } 661 662 if (!m) { 663 /* 664 * EOF - the other end has closed the socket. 665 */ 666 xprt_inactive(xprt); 667 cd->strm_stat = XPRT_DIED; 668 sx_xunlock(&xprt->xp_lock); 669 return (FALSE); 670 } 671 672 if (cd->mpending) 673 m_last(cd->mpending)->m_next = m; 674 else 675 cd->mpending = m; 676 } 677 } 678 679 static bool_t 680 svc_vc_reply(SVCXPRT *xprt, struct rpc_msg *msg, 681 struct sockaddr *addr, struct mbuf *m) 682 { 683 XDR xdrs; 684 struct mbuf *mrep; 685 bool_t stat = TRUE; 686 int error; 687 688 /* 689 * Leave space for record mark. 690 */ 691 MGETHDR(mrep, M_WAIT, MT_DATA); 692 mrep->m_len = 0; 693 mrep->m_data += sizeof(uint32_t); 694 695 xdrmbuf_create(&xdrs, mrep, XDR_ENCODE); 696 697 if (msg->rm_reply.rp_stat == MSG_ACCEPTED && 698 msg->rm_reply.rp_acpt.ar_stat == SUCCESS) { 699 if (!xdr_replymsg(&xdrs, msg)) 700 stat = FALSE; 701 else 702 xdrmbuf_append(&xdrs, m); 703 } else { 704 stat = xdr_replymsg(&xdrs, msg); 705 } 706 707 if (stat) { 708 m_fixhdr(mrep); 709 710 /* 711 * Prepend a record marker containing the reply length. 712 */ 713 M_PREPEND(mrep, sizeof(uint32_t), M_WAIT); 714 *mtod(mrep, uint32_t *) = 715 htonl(0x80000000 | (mrep->m_pkthdr.len 716 - sizeof(uint32_t))); 717 error = sosend(xprt->xp_socket, NULL, NULL, mrep, NULL, 718 0, curthread); 719 if (!error) { 720 stat = TRUE; 721 } 722 } else { 723 m_freem(mrep); 724 } 725 726 XDR_DESTROY(&xdrs); 727 xprt->xp_p2 = NULL; 728 729 return (stat); 730 } 731 732 static bool_t 733 svc_vc_null() 734 { 735 736 return (FALSE); 737 } 738 739 static int 740 svc_vc_soupcall(struct socket *so, void *arg, int waitflag) 741 { 742 SVCXPRT *xprt = (SVCXPRT *) arg; 743 744 xprt_active(xprt); 745 return (SU_OK); 746 } 747 748 #if 0 749 /* 750 * Get the effective UID of the sending process. Used by rpcbind, keyserv 751 * and rpc.yppasswdd on AF_LOCAL. 752 */ 753 int 754 __rpc_get_local_uid(SVCXPRT *transp, uid_t *uid) { 755 int sock, ret; 756 gid_t egid; 757 uid_t euid; 758 struct sockaddr *sa; 759 760 sock = transp->xp_fd; 761 sa = (struct sockaddr *)transp->xp_rtaddr; 762 if (sa->sa_family == AF_LOCAL) { 763 ret = getpeereid(sock, &euid, &egid); 764 if (ret == 0) 765 *uid = euid; 766 return (ret); 767 } else 768 return (-1); 769 } 770 #endif 771