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