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 62 #include <net/vnet.h> 63 64 #include <netinet/tcp.h> 65 66 #include <rpc/rpc.h> 67 68 #include <rpc/rpc_com.h> 69 70 #include <security/mac/mac_framework.h> 71 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_recv(SVCXPRT *, struct rpc_msg *, 80 struct sockaddr **, struct mbuf **); 81 static bool_t svc_vc_reply(SVCXPRT *, struct rpc_msg *, 82 struct sockaddr *, struct mbuf *); 83 static bool_t svc_vc_control(SVCXPRT *xprt, const u_int rq, void *in); 84 static bool_t svc_vc_rendezvous_control (SVCXPRT *xprt, const u_int rq, 85 void *in); 86 static SVCXPRT *svc_vc_create_conn(SVCPOOL *pool, struct socket *so, 87 struct sockaddr *raddr); 88 static int svc_vc_accept(struct socket *head, struct socket **sop); 89 static int svc_vc_soupcall(struct socket *so, void *arg, int waitflag); 90 91 static struct xp_ops svc_vc_rendezvous_ops = { 92 .xp_recv = svc_vc_rendezvous_recv, 93 .xp_stat = svc_vc_rendezvous_stat, 94 .xp_reply = (bool_t (*)(SVCXPRT *, struct rpc_msg *, 95 struct sockaddr *, struct mbuf *))svc_vc_null, 96 .xp_destroy = svc_vc_rendezvous_destroy, 97 .xp_control = svc_vc_rendezvous_control 98 }; 99 100 static struct xp_ops svc_vc_ops = { 101 .xp_recv = svc_vc_recv, 102 .xp_stat = svc_vc_stat, 103 .xp_reply = svc_vc_reply, 104 .xp_destroy = svc_vc_destroy, 105 .xp_control = svc_vc_control 106 }; 107 108 struct cf_conn { /* kept in xprt->xp_p1 for actual connection */ 109 enum xprt_stat strm_stat; 110 struct mbuf *mpending; /* unparsed data read from the socket */ 111 struct mbuf *mreq; /* current record being built from mpending */ 112 uint32_t resid; /* number of bytes needed for fragment */ 113 bool_t eor; /* reading last fragment of current record */ 114 }; 115 116 /* 117 * Usage: 118 * xprt = svc_vc_create(sock, send_buf_size, recv_buf_size); 119 * 120 * Creates, registers, and returns a (rpc) tcp based transporter. 121 * Once *xprt is initialized, it is registered as a transporter 122 * see (svc.h, xprt_register). This routine returns 123 * a NULL if a problem occurred. 124 * 125 * The filedescriptor passed in is expected to refer to a bound, but 126 * not yet connected socket. 127 * 128 * Since streams do buffered io similar to stdio, the caller can specify 129 * how big the send and receive buffers are via the second and third parms; 130 * 0 => use the system default. 131 */ 132 SVCXPRT * 133 svc_vc_create(SVCPOOL *pool, struct socket *so, size_t sendsize, 134 size_t recvsize) 135 { 136 SVCXPRT *xprt; 137 struct sockaddr* sa; 138 int error; 139 140 if (so->so_state & SS_ISCONNECTED) { 141 error = so->so_proto->pr_usrreqs->pru_peeraddr(so, &sa); 142 if (error) 143 return (NULL); 144 xprt = svc_vc_create_conn(pool, so, sa); 145 free(sa, M_SONAME); 146 return (xprt); 147 } 148 149 xprt = svc_xprt_alloc(); 150 sx_init(&xprt->xp_lock, "xprt->xp_lock"); 151 xprt->xp_pool = pool; 152 xprt->xp_socket = so; 153 xprt->xp_p1 = NULL; 154 xprt->xp_p2 = NULL; 155 xprt->xp_ops = &svc_vc_rendezvous_ops; 156 157 error = so->so_proto->pr_usrreqs->pru_sockaddr(so, &sa); 158 if (error) { 159 goto cleanup_svc_vc_create; 160 } 161 162 memcpy(&xprt->xp_ltaddr, sa, sa->sa_len); 163 free(sa, M_SONAME); 164 165 xprt_register(xprt); 166 167 solisten(so, SOMAXCONN, curthread); 168 169 SOCKBUF_LOCK(&so->so_rcv); 170 xprt->xp_upcallset = 1; 171 soupcall_set(so, SO_RCV, svc_vc_soupcall, xprt); 172 SOCKBUF_UNLOCK(&so->so_rcv); 173 174 return (xprt); 175 cleanup_svc_vc_create: 176 if (xprt) 177 svc_xprt_free(xprt); 178 return (NULL); 179 } 180 181 /* 182 * Create a new transport for a socket optained via soaccept(). 183 */ 184 SVCXPRT * 185 svc_vc_create_conn(SVCPOOL *pool, struct socket *so, struct sockaddr *raddr) 186 { 187 SVCXPRT *xprt = NULL; 188 struct cf_conn *cd = NULL; 189 struct sockaddr* sa = NULL; 190 struct sockopt opt; 191 int one = 1; 192 int error; 193 194 bzero(&opt, sizeof(struct sockopt)); 195 opt.sopt_dir = SOPT_SET; 196 opt.sopt_level = SOL_SOCKET; 197 opt.sopt_name = SO_KEEPALIVE; 198 opt.sopt_val = &one; 199 opt.sopt_valsize = sizeof(one); 200 error = sosetopt(so, &opt); 201 if (error) { 202 return (NULL); 203 } 204 205 if (so->so_proto->pr_protocol == IPPROTO_TCP) { 206 bzero(&opt, sizeof(struct sockopt)); 207 opt.sopt_dir = SOPT_SET; 208 opt.sopt_level = IPPROTO_TCP; 209 opt.sopt_name = TCP_NODELAY; 210 opt.sopt_val = &one; 211 opt.sopt_valsize = sizeof(one); 212 error = sosetopt(so, &opt); 213 if (error) { 214 return (NULL); 215 } 216 } 217 218 cd = mem_alloc(sizeof(*cd)); 219 cd->strm_stat = XPRT_IDLE; 220 221 xprt = svc_xprt_alloc(); 222 sx_init(&xprt->xp_lock, "xprt->xp_lock"); 223 xprt->xp_pool = pool; 224 xprt->xp_socket = so; 225 xprt->xp_p1 = cd; 226 xprt->xp_p2 = NULL; 227 xprt->xp_ops = &svc_vc_ops; 228 229 /* 230 * See http://www.connectathon.org/talks96/nfstcp.pdf - client 231 * has a 5 minute timer, server has a 6 minute timer. 232 */ 233 xprt->xp_idletimeout = 6 * 60; 234 235 memcpy(&xprt->xp_rtaddr, raddr, raddr->sa_len); 236 237 error = so->so_proto->pr_usrreqs->pru_sockaddr(so, &sa); 238 if (error) 239 goto cleanup_svc_vc_create; 240 241 memcpy(&xprt->xp_ltaddr, sa, sa->sa_len); 242 free(sa, M_SONAME); 243 244 xprt_register(xprt); 245 246 SOCKBUF_LOCK(&so->so_rcv); 247 xprt->xp_upcallset = 1; 248 soupcall_set(so, SO_RCV, svc_vc_soupcall, xprt); 249 SOCKBUF_UNLOCK(&so->so_rcv); 250 251 /* 252 * Throw the transport into the active list in case it already 253 * has some data buffered. 254 */ 255 sx_xlock(&xprt->xp_lock); 256 xprt_active(xprt); 257 sx_xunlock(&xprt->xp_lock); 258 259 return (xprt); 260 cleanup_svc_vc_create: 261 if (xprt) { 262 mem_free(xprt, sizeof(*xprt)); 263 } 264 if (cd) 265 mem_free(cd, sizeof(*cd)); 266 return (NULL); 267 } 268 269 /* 270 * This does all of the accept except the final call to soaccept. The 271 * caller will call soaccept after dropping its locks (soaccept may 272 * call malloc). 273 */ 274 int 275 svc_vc_accept(struct socket *head, struct socket **sop) 276 { 277 int error = 0; 278 struct socket *so; 279 280 if ((head->so_options & SO_ACCEPTCONN) == 0) { 281 error = EINVAL; 282 goto done; 283 } 284 #ifdef MAC 285 error = mac_socket_check_accept(curthread->td_ucred, head); 286 if (error != 0) 287 goto done; 288 #endif 289 ACCEPT_LOCK(); 290 if (TAILQ_EMPTY(&head->so_comp)) { 291 ACCEPT_UNLOCK(); 292 error = EWOULDBLOCK; 293 goto done; 294 } 295 so = TAILQ_FIRST(&head->so_comp); 296 KASSERT(!(so->so_qstate & SQ_INCOMP), ("svc_vc_accept: so SQ_INCOMP")); 297 KASSERT(so->so_qstate & SQ_COMP, ("svc_vc_accept: so not SQ_COMP")); 298 299 /* 300 * Before changing the flags on the socket, we have to bump the 301 * reference count. Otherwise, if the protocol calls sofree(), 302 * the socket will be released due to a zero refcount. 303 * XXX might not need soref() since this is simpler than kern_accept. 304 */ 305 SOCK_LOCK(so); /* soref() and so_state update */ 306 soref(so); /* file descriptor reference */ 307 308 TAILQ_REMOVE(&head->so_comp, so, so_list); 309 head->so_qlen--; 310 so->so_state |= (head->so_state & SS_NBIO); 311 so->so_qstate &= ~SQ_COMP; 312 so->so_head = NULL; 313 314 SOCK_UNLOCK(so); 315 ACCEPT_UNLOCK(); 316 317 *sop = so; 318 319 /* connection has been removed from the listen queue */ 320 KNOTE_UNLOCKED(&head->so_rcv.sb_sel.si_note, 0); 321 done: 322 return (error); 323 } 324 325 /*ARGSUSED*/ 326 static bool_t 327 svc_vc_rendezvous_recv(SVCXPRT *xprt, struct rpc_msg *msg, 328 struct sockaddr **addrp, struct mbuf **mp) 329 { 330 struct socket *so = NULL; 331 struct sockaddr *sa = NULL; 332 int error; 333 SVCXPRT *new_xprt; 334 335 /* 336 * The socket upcall calls xprt_active() which will eventually 337 * cause the server to call us here. We attempt to accept a 338 * connection from the socket and turn it into a new 339 * transport. If the accept fails, we have drained all pending 340 * connections so we call xprt_inactive(). 341 */ 342 sx_xlock(&xprt->xp_lock); 343 344 error = svc_vc_accept(xprt->xp_socket, &so); 345 346 if (error == EWOULDBLOCK) { 347 /* 348 * We must re-test for new connections after taking 349 * the lock to protect us in the case where a new 350 * connection arrives after our call to accept fails 351 * with EWOULDBLOCK. The pool lock protects us from 352 * racing the upcall after our TAILQ_EMPTY() call 353 * returns false. 354 */ 355 ACCEPT_LOCK(); 356 mtx_lock(&xprt->xp_pool->sp_lock); 357 if (TAILQ_EMPTY(&xprt->xp_socket->so_comp)) 358 xprt_inactive_locked(xprt); 359 mtx_unlock(&xprt->xp_pool->sp_lock); 360 ACCEPT_UNLOCK(); 361 sx_xunlock(&xprt->xp_lock); 362 return (FALSE); 363 } 364 365 if (error) { 366 SOCKBUF_LOCK(&xprt->xp_socket->so_rcv); 367 if (xprt->xp_upcallset) { 368 xprt->xp_upcallset = 0; 369 soupcall_clear(xprt->xp_socket, SO_RCV); 370 } 371 SOCKBUF_UNLOCK(&xprt->xp_socket->so_rcv); 372 xprt_inactive(xprt); 373 sx_xunlock(&xprt->xp_lock); 374 return (FALSE); 375 } 376 377 sx_xunlock(&xprt->xp_lock); 378 379 sa = 0; 380 error = soaccept(so, &sa); 381 382 if (error) { 383 /* 384 * XXX not sure if I need to call sofree or soclose here. 385 */ 386 if (sa) 387 free(sa, M_SONAME); 388 return (FALSE); 389 } 390 391 /* 392 * svc_vc_create_conn will call xprt_register - we don't need 393 * to do anything with the new connection except derefence it. 394 */ 395 new_xprt = svc_vc_create_conn(xprt->xp_pool, so, sa); 396 if (!new_xprt) { 397 soclose(so); 398 } else { 399 SVC_RELEASE(new_xprt); 400 } 401 402 free(sa, M_SONAME); 403 404 return (FALSE); /* there is never an rpc msg to be processed */ 405 } 406 407 /*ARGSUSED*/ 408 static enum xprt_stat 409 svc_vc_rendezvous_stat(SVCXPRT *xprt) 410 { 411 412 return (XPRT_IDLE); 413 } 414 415 static void 416 svc_vc_destroy_common(SVCXPRT *xprt) 417 { 418 SOCKBUF_LOCK(&xprt->xp_socket->so_rcv); 419 if (xprt->xp_upcallset) { 420 xprt->xp_upcallset = 0; 421 soupcall_clear(xprt->xp_socket, SO_RCV); 422 } 423 SOCKBUF_UNLOCK(&xprt->xp_socket->so_rcv); 424 425 sx_destroy(&xprt->xp_lock); 426 if (xprt->xp_socket) 427 (void)soclose(xprt->xp_socket); 428 429 if (xprt->xp_netid) 430 (void) mem_free(xprt->xp_netid, strlen(xprt->xp_netid) + 1); 431 svc_xprt_free(xprt); 432 } 433 434 static void 435 svc_vc_rendezvous_destroy(SVCXPRT *xprt) 436 { 437 438 svc_vc_destroy_common(xprt); 439 } 440 441 static void 442 svc_vc_destroy(SVCXPRT *xprt) 443 { 444 struct cf_conn *cd = (struct cf_conn *)xprt->xp_p1; 445 446 svc_vc_destroy_common(xprt); 447 448 if (cd->mreq) 449 m_freem(cd->mreq); 450 if (cd->mpending) 451 m_freem(cd->mpending); 452 mem_free(cd, sizeof(*cd)); 453 } 454 455 /*ARGSUSED*/ 456 static bool_t 457 svc_vc_control(SVCXPRT *xprt, const u_int rq, void *in) 458 { 459 return (FALSE); 460 } 461 462 static bool_t 463 svc_vc_rendezvous_control(SVCXPRT *xprt, const u_int rq, void *in) 464 { 465 466 return (FALSE); 467 } 468 469 static enum xprt_stat 470 svc_vc_stat(SVCXPRT *xprt) 471 { 472 struct cf_conn *cd; 473 struct mbuf *m; 474 size_t n; 475 476 cd = (struct cf_conn *)(xprt->xp_p1); 477 478 if (cd->strm_stat == XPRT_DIED) 479 return (XPRT_DIED); 480 481 /* 482 * Return XPRT_MOREREQS if we have buffered data and we are 483 * mid-record or if we have enough data for a record 484 * marker. Since this is only a hint, we read mpending and 485 * resid outside the lock. We do need to take the lock if we 486 * have to traverse the mbuf chain. 487 */ 488 if (cd->mpending) { 489 if (cd->resid) 490 return (XPRT_MOREREQS); 491 n = 0; 492 sx_xlock(&xprt->xp_lock); 493 m = cd->mpending; 494 while (m && n < sizeof(uint32_t)) { 495 n += m->m_len; 496 m = m->m_next; 497 } 498 sx_xunlock(&xprt->xp_lock); 499 if (n >= sizeof(uint32_t)) 500 return (XPRT_MOREREQS); 501 } 502 503 if (soreadable(xprt->xp_socket)) 504 return (XPRT_MOREREQS); 505 506 return (XPRT_IDLE); 507 } 508 509 static bool_t 510 svc_vc_recv(SVCXPRT *xprt, struct rpc_msg *msg, 511 struct sockaddr **addrp, struct mbuf **mp) 512 { 513 struct cf_conn *cd = (struct cf_conn *) xprt->xp_p1; 514 struct uio uio; 515 struct mbuf *m; 516 XDR xdrs; 517 int error, rcvflag; 518 519 /* 520 * Serialise access to the socket and our own record parsing 521 * state. 522 */ 523 sx_xlock(&xprt->xp_lock); 524 525 for (;;) { 526 /* 527 * If we have an mbuf chain in cd->mpending, try to parse a 528 * record from it, leaving the result in cd->mreq. If we don't 529 * have a complete record, leave the partial result in 530 * cd->mreq and try to read more from the socket. 531 */ 532 if (cd->mpending) { 533 /* 534 * If cd->resid is non-zero, we have part of the 535 * record already, otherwise we are expecting a record 536 * marker. 537 */ 538 if (!cd->resid) { 539 /* 540 * See if there is enough data buffered to 541 * make up a record marker. Make sure we can 542 * handle the case where the record marker is 543 * split across more than one mbuf. 544 */ 545 size_t n = 0; 546 uint32_t header; 547 548 m = cd->mpending; 549 while (n < sizeof(uint32_t) && m) { 550 n += m->m_len; 551 m = m->m_next; 552 } 553 if (n < sizeof(uint32_t)) 554 goto readmore; 555 m_copydata(cd->mpending, 0, sizeof(header), 556 (char *)&header); 557 header = ntohl(header); 558 cd->eor = (header & 0x80000000) != 0; 559 cd->resid = header & 0x7fffffff; 560 m_adj(cd->mpending, sizeof(uint32_t)); 561 } 562 563 /* 564 * Start pulling off mbufs from cd->mpending 565 * until we either have a complete record or 566 * we run out of data. We use m_split to pull 567 * data - it will pull as much as possible and 568 * split the last mbuf if necessary. 569 */ 570 while (cd->mpending && cd->resid) { 571 m = cd->mpending; 572 if (cd->mpending->m_next 573 || cd->mpending->m_len > cd->resid) 574 cd->mpending = m_split(cd->mpending, 575 cd->resid, M_WAIT); 576 else 577 cd->mpending = NULL; 578 if (cd->mreq) 579 m_last(cd->mreq)->m_next = m; 580 else 581 cd->mreq = m; 582 while (m) { 583 cd->resid -= m->m_len; 584 m = m->m_next; 585 } 586 } 587 588 /* 589 * If cd->resid is zero now, we have managed to 590 * receive a record fragment from the stream. Check 591 * for the end-of-record mark to see if we need more. 592 */ 593 if (cd->resid == 0) { 594 if (!cd->eor) 595 continue; 596 597 /* 598 * Success - we have a complete record in 599 * cd->mreq. 600 */ 601 xdrmbuf_create(&xdrs, cd->mreq, XDR_DECODE); 602 cd->mreq = NULL; 603 sx_xunlock(&xprt->xp_lock); 604 605 if (! xdr_callmsg(&xdrs, msg)) { 606 XDR_DESTROY(&xdrs); 607 return (FALSE); 608 } 609 610 *addrp = NULL; 611 *mp = xdrmbuf_getall(&xdrs); 612 XDR_DESTROY(&xdrs); 613 614 return (TRUE); 615 } 616 } 617 618 readmore: 619 /* 620 * The socket upcall calls xprt_active() which will eventually 621 * cause the server to call us here. We attempt to 622 * read as much as possible from the socket and put 623 * the result in cd->mpending. If the read fails, 624 * we have drained both cd->mpending and the socket so 625 * we can call xprt_inactive(). 626 */ 627 uio.uio_resid = 1000000000; 628 uio.uio_td = curthread; 629 m = NULL; 630 rcvflag = MSG_DONTWAIT; 631 error = soreceive(xprt->xp_socket, NULL, &uio, &m, NULL, 632 &rcvflag); 633 634 if (error == EWOULDBLOCK) { 635 /* 636 * We must re-test for readability after 637 * taking the lock to protect us in the case 638 * where a new packet arrives on the socket 639 * after our call to soreceive fails with 640 * EWOULDBLOCK. The pool lock protects us from 641 * racing the upcall after our soreadable() 642 * call returns false. 643 */ 644 mtx_lock(&xprt->xp_pool->sp_lock); 645 if (!soreadable(xprt->xp_socket)) 646 xprt_inactive_locked(xprt); 647 mtx_unlock(&xprt->xp_pool->sp_lock); 648 sx_xunlock(&xprt->xp_lock); 649 return (FALSE); 650 } 651 652 if (error) { 653 SOCKBUF_LOCK(&xprt->xp_socket->so_rcv); 654 if (xprt->xp_upcallset) { 655 xprt->xp_upcallset = 0; 656 soupcall_clear(xprt->xp_socket, SO_RCV); 657 } 658 SOCKBUF_UNLOCK(&xprt->xp_socket->so_rcv); 659 xprt_inactive(xprt); 660 cd->strm_stat = XPRT_DIED; 661 sx_xunlock(&xprt->xp_lock); 662 return (FALSE); 663 } 664 665 if (!m) { 666 /* 667 * EOF - the other end has closed the socket. 668 */ 669 xprt_inactive(xprt); 670 cd->strm_stat = XPRT_DIED; 671 sx_xunlock(&xprt->xp_lock); 672 return (FALSE); 673 } 674 675 if (cd->mpending) 676 m_last(cd->mpending)->m_next = m; 677 else 678 cd->mpending = m; 679 } 680 } 681 682 static bool_t 683 svc_vc_reply(SVCXPRT *xprt, struct rpc_msg *msg, 684 struct sockaddr *addr, struct mbuf *m) 685 { 686 XDR xdrs; 687 struct mbuf *mrep; 688 bool_t stat = TRUE; 689 int error; 690 691 /* 692 * Leave space for record mark. 693 */ 694 MGETHDR(mrep, M_WAIT, MT_DATA); 695 mrep->m_len = 0; 696 mrep->m_data += sizeof(uint32_t); 697 698 xdrmbuf_create(&xdrs, mrep, XDR_ENCODE); 699 700 if (msg->rm_reply.rp_stat == MSG_ACCEPTED && 701 msg->rm_reply.rp_acpt.ar_stat == SUCCESS) { 702 if (!xdr_replymsg(&xdrs, msg)) 703 stat = FALSE; 704 else 705 xdrmbuf_append(&xdrs, m); 706 } else { 707 stat = xdr_replymsg(&xdrs, msg); 708 } 709 710 if (stat) { 711 m_fixhdr(mrep); 712 713 /* 714 * Prepend a record marker containing the reply length. 715 */ 716 M_PREPEND(mrep, sizeof(uint32_t), M_WAIT); 717 *mtod(mrep, uint32_t *) = 718 htonl(0x80000000 | (mrep->m_pkthdr.len 719 - sizeof(uint32_t))); 720 error = sosend(xprt->xp_socket, NULL, NULL, mrep, NULL, 721 0, curthread); 722 if (!error) { 723 stat = TRUE; 724 } 725 } else { 726 m_freem(mrep); 727 } 728 729 XDR_DESTROY(&xdrs); 730 xprt->xp_p2 = NULL; 731 732 return (stat); 733 } 734 735 static bool_t 736 svc_vc_null() 737 { 738 739 return (FALSE); 740 } 741 742 static int 743 svc_vc_soupcall(struct socket *so, void *arg, int waitflag) 744 { 745 SVCXPRT *xprt = (SVCXPRT *) arg; 746 747 xprt_active(xprt); 748 return (SU_OK); 749 } 750 751 #if 0 752 /* 753 * Get the effective UID of the sending process. Used by rpcbind, keyserv 754 * and rpc.yppasswdd on AF_LOCAL. 755 */ 756 int 757 __rpc_get_local_uid(SVCXPRT *transp, uid_t *uid) { 758 int sock, ret; 759 gid_t egid; 760 uid_t euid; 761 struct sockaddr *sa; 762 763 sock = transp->xp_fd; 764 sa = (struct sockaddr *)transp->xp_rtaddr; 765 if (sa->sa_family == AF_LOCAL) { 766 ret = getpeereid(sock, &euid, &egid); 767 if (ret == 0) 768 *uid = euid; 769 return (ret); 770 } else 771 return (-1); 772 } 773 #endif 774