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