svc_vc.c revision 217242
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) 33static char *sccsid2 = "@(#)svc_tcp.c 1.21 87/08/11 Copyr 1984 Sun Micro"; 34static char *sccsid = "@(#)svc_tcp.c 2.2 88/08/01 4.0 RPCSRC"; 35#endif 36#include <sys/cdefs.h> 37__FBSDID("$FreeBSD: head/sys/rpc/svc_vc.c 217242 2011-01-10 21:35:10Z rmacklem $"); 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 72static bool_t svc_vc_rendezvous_recv(SVCXPRT *, struct rpc_msg *, 73 struct sockaddr **, struct mbuf **); 74static enum xprt_stat svc_vc_rendezvous_stat(SVCXPRT *); 75static void svc_vc_rendezvous_destroy(SVCXPRT *); 76static bool_t svc_vc_null(void); 77static void svc_vc_destroy(SVCXPRT *); 78static enum xprt_stat svc_vc_stat(SVCXPRT *); 79static bool_t svc_vc_recv(SVCXPRT *, struct rpc_msg *, 80 struct sockaddr **, struct mbuf **); 81static bool_t svc_vc_reply(SVCXPRT *, struct rpc_msg *, 82 struct sockaddr *, struct mbuf *); 83static bool_t svc_vc_control(SVCXPRT *xprt, const u_int rq, void *in); 84static bool_t svc_vc_rendezvous_control (SVCXPRT *xprt, const u_int rq, 85 void *in); 86static SVCXPRT *svc_vc_create_conn(SVCPOOL *pool, struct socket *so, 87 struct sockaddr *raddr); 88static int svc_vc_accept(struct socket *head, struct socket **sop); 89static int svc_vc_soupcall(struct socket *so, void *arg, int waitflag); 90 91static 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 100static 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 108struct 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 */ 132SVCXPRT * 133svc_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 CURVNET_SET(so->so_vnet); 158 error = so->so_proto->pr_usrreqs->pru_sockaddr(so, &sa); 159 if (error) { 160 CURVNET_RESTORE(); 161 goto cleanup_svc_vc_create; 162 } 163 164 memcpy(&xprt->xp_ltaddr, sa, sa->sa_len); 165 free(sa, M_SONAME); 166 167 xprt_register(xprt); 168 169 solisten(so, SOMAXCONN, curthread); 170 CURVNET_RESTORE(); 171 172 SOCKBUF_LOCK(&so->so_rcv); 173 xprt->xp_upcallset = 1; 174 soupcall_set(so, SO_RCV, svc_vc_soupcall, xprt); 175 SOCKBUF_UNLOCK(&so->so_rcv); 176 177 return (xprt); 178cleanup_svc_vc_create: 179 if (xprt) 180 svc_xprt_free(xprt); 181 return (NULL); 182} 183 184/* 185 * Create a new transport for a socket optained via soaccept(). 186 */ 187SVCXPRT * 188svc_vc_create_conn(SVCPOOL *pool, struct socket *so, struct sockaddr *raddr) 189{ 190 SVCXPRT *xprt = NULL; 191 struct cf_conn *cd = NULL; 192 struct sockaddr* sa = NULL; 193 struct sockopt opt; 194 int one = 1; 195 int error; 196 197 bzero(&opt, sizeof(struct sockopt)); 198 opt.sopt_dir = SOPT_SET; 199 opt.sopt_level = SOL_SOCKET; 200 opt.sopt_name = SO_KEEPALIVE; 201 opt.sopt_val = &one; 202 opt.sopt_valsize = sizeof(one); 203 CURVNET_SET(so->so_vnet); 204 error = sosetopt(so, &opt); 205 if (error) { 206 CURVNET_RESTORE(); 207 return (NULL); 208 } 209 210 if (so->so_proto->pr_protocol == IPPROTO_TCP) { 211 bzero(&opt, sizeof(struct sockopt)); 212 opt.sopt_dir = SOPT_SET; 213 opt.sopt_level = IPPROTO_TCP; 214 opt.sopt_name = TCP_NODELAY; 215 opt.sopt_val = &one; 216 opt.sopt_valsize = sizeof(one); 217 error = sosetopt(so, &opt); 218 if (error) { 219 CURVNET_RESTORE(); 220 return (NULL); 221 } 222 } 223 CURVNET_RESTORE(); 224 225 cd = mem_alloc(sizeof(*cd)); 226 cd->strm_stat = XPRT_IDLE; 227 228 xprt = svc_xprt_alloc(); 229 sx_init(&xprt->xp_lock, "xprt->xp_lock"); 230 xprt->xp_pool = pool; 231 xprt->xp_socket = so; 232 xprt->xp_p1 = cd; 233 xprt->xp_p2 = NULL; 234 xprt->xp_ops = &svc_vc_ops; 235 236 /* 237 * See http://www.connectathon.org/talks96/nfstcp.pdf - client 238 * has a 5 minute timer, server has a 6 minute timer. 239 */ 240 xprt->xp_idletimeout = 6 * 60; 241 242 memcpy(&xprt->xp_rtaddr, raddr, raddr->sa_len); 243 244 error = so->so_proto->pr_usrreqs->pru_sockaddr(so, &sa); 245 if (error) 246 goto cleanup_svc_vc_create; 247 248 memcpy(&xprt->xp_ltaddr, sa, sa->sa_len); 249 free(sa, M_SONAME); 250 251 xprt_register(xprt); 252 253 SOCKBUF_LOCK(&so->so_rcv); 254 xprt->xp_upcallset = 1; 255 soupcall_set(so, SO_RCV, svc_vc_soupcall, xprt); 256 SOCKBUF_UNLOCK(&so->so_rcv); 257 258 /* 259 * Throw the transport into the active list in case it already 260 * has some data buffered. 261 */ 262 sx_xlock(&xprt->xp_lock); 263 xprt_active(xprt); 264 sx_xunlock(&xprt->xp_lock); 265 266 return (xprt); 267cleanup_svc_vc_create: 268 if (xprt) { 269 mem_free(xprt, sizeof(*xprt)); 270 } 271 if (cd) 272 mem_free(cd, sizeof(*cd)); 273 return (NULL); 274} 275 276/* 277 * This does all of the accept except the final call to soaccept. The 278 * caller will call soaccept after dropping its locks (soaccept may 279 * call malloc). 280 */ 281int 282svc_vc_accept(struct socket *head, struct socket **sop) 283{ 284 int error = 0; 285 struct socket *so; 286 287 if ((head->so_options & SO_ACCEPTCONN) == 0) { 288 error = EINVAL; 289 goto done; 290 } 291#ifdef MAC 292 error = mac_socket_check_accept(curthread->td_ucred, head); 293 if (error != 0) 294 goto done; 295#endif 296 ACCEPT_LOCK(); 297 if (TAILQ_EMPTY(&head->so_comp)) { 298 ACCEPT_UNLOCK(); 299 error = EWOULDBLOCK; 300 goto done; 301 } 302 so = TAILQ_FIRST(&head->so_comp); 303 KASSERT(!(so->so_qstate & SQ_INCOMP), ("svc_vc_accept: so SQ_INCOMP")); 304 KASSERT(so->so_qstate & SQ_COMP, ("svc_vc_accept: so not SQ_COMP")); 305 306 /* 307 * Before changing the flags on the socket, we have to bump the 308 * reference count. Otherwise, if the protocol calls sofree(), 309 * the socket will be released due to a zero refcount. 310 * XXX might not need soref() since this is simpler than kern_accept. 311 */ 312 SOCK_LOCK(so); /* soref() and so_state update */ 313 soref(so); /* file descriptor reference */ 314 315 TAILQ_REMOVE(&head->so_comp, so, so_list); 316 head->so_qlen--; 317 so->so_state |= (head->so_state & SS_NBIO); 318 so->so_qstate &= ~SQ_COMP; 319 so->so_head = NULL; 320 321 SOCK_UNLOCK(so); 322 ACCEPT_UNLOCK(); 323 324 *sop = so; 325 326 /* connection has been removed from the listen queue */ 327 KNOTE_UNLOCKED(&head->so_rcv.sb_sel.si_note, 0); 328done: 329 return (error); 330} 331 332/*ARGSUSED*/ 333static bool_t 334svc_vc_rendezvous_recv(SVCXPRT *xprt, struct rpc_msg *msg, 335 struct sockaddr **addrp, struct mbuf **mp) 336{ 337 struct socket *so = NULL; 338 struct sockaddr *sa = NULL; 339 int error; 340 SVCXPRT *new_xprt; 341 342 /* 343 * The socket upcall calls xprt_active() which will eventually 344 * cause the server to call us here. We attempt to accept a 345 * connection from the socket and turn it into a new 346 * transport. If the accept fails, we have drained all pending 347 * connections so we call xprt_inactive(). 348 */ 349 sx_xlock(&xprt->xp_lock); 350 351 error = svc_vc_accept(xprt->xp_socket, &so); 352 353 if (error == EWOULDBLOCK) { 354 /* 355 * We must re-test for new connections after taking 356 * the lock to protect us in the case where a new 357 * connection arrives after our call to accept fails 358 * with EWOULDBLOCK. The pool lock protects us from 359 * racing the upcall after our TAILQ_EMPTY() call 360 * returns false. 361 */ 362 ACCEPT_LOCK(); 363 mtx_lock(&xprt->xp_pool->sp_lock); 364 if (TAILQ_EMPTY(&xprt->xp_socket->so_comp)) 365 xprt_inactive_locked(xprt); 366 mtx_unlock(&xprt->xp_pool->sp_lock); 367 ACCEPT_UNLOCK(); 368 sx_xunlock(&xprt->xp_lock); 369 return (FALSE); 370 } 371 372 if (error) { 373 SOCKBUF_LOCK(&xprt->xp_socket->so_rcv); 374 if (xprt->xp_upcallset) { 375 xprt->xp_upcallset = 0; 376 soupcall_clear(xprt->xp_socket, SO_RCV); 377 } 378 SOCKBUF_UNLOCK(&xprt->xp_socket->so_rcv); 379 xprt_inactive(xprt); 380 sx_xunlock(&xprt->xp_lock); 381 return (FALSE); 382 } 383 384 sx_xunlock(&xprt->xp_lock); 385 386 sa = 0; 387 error = soaccept(so, &sa); 388 389 if (error) { 390 /* 391 * XXX not sure if I need to call sofree or soclose here. 392 */ 393 if (sa) 394 free(sa, M_SONAME); 395 return (FALSE); 396 } 397 398 /* 399 * svc_vc_create_conn will call xprt_register - we don't need 400 * to do anything with the new connection except derefence it. 401 */ 402 new_xprt = svc_vc_create_conn(xprt->xp_pool, so, sa); 403 if (!new_xprt) { 404 soclose(so); 405 } else { 406 SVC_RELEASE(new_xprt); 407 } 408 409 free(sa, M_SONAME); 410 411 return (FALSE); /* there is never an rpc msg to be processed */ 412} 413 414/*ARGSUSED*/ 415static enum xprt_stat 416svc_vc_rendezvous_stat(SVCXPRT *xprt) 417{ 418 419 return (XPRT_IDLE); 420} 421 422static void 423svc_vc_destroy_common(SVCXPRT *xprt) 424{ 425 SOCKBUF_LOCK(&xprt->xp_socket->so_rcv); 426 if (xprt->xp_upcallset) { 427 xprt->xp_upcallset = 0; 428 soupcall_clear(xprt->xp_socket, SO_RCV); 429 } 430 SOCKBUF_UNLOCK(&xprt->xp_socket->so_rcv); 431 432 sx_destroy(&xprt->xp_lock); 433 if (xprt->xp_socket) 434 (void)soclose(xprt->xp_socket); 435 436 if (xprt->xp_netid) 437 (void) mem_free(xprt->xp_netid, strlen(xprt->xp_netid) + 1); 438 svc_xprt_free(xprt); 439} 440 441static void 442svc_vc_rendezvous_destroy(SVCXPRT *xprt) 443{ 444 445 svc_vc_destroy_common(xprt); 446} 447 448static void 449svc_vc_destroy(SVCXPRT *xprt) 450{ 451 struct cf_conn *cd = (struct cf_conn *)xprt->xp_p1; 452 453 svc_vc_destroy_common(xprt); 454 455 if (cd->mreq) 456 m_freem(cd->mreq); 457 if (cd->mpending) 458 m_freem(cd->mpending); 459 mem_free(cd, sizeof(*cd)); 460} 461 462/*ARGSUSED*/ 463static bool_t 464svc_vc_control(SVCXPRT *xprt, const u_int rq, void *in) 465{ 466 return (FALSE); 467} 468 469static bool_t 470svc_vc_rendezvous_control(SVCXPRT *xprt, const u_int rq, void *in) 471{ 472 473 return (FALSE); 474} 475 476static enum xprt_stat 477svc_vc_stat(SVCXPRT *xprt) 478{ 479 struct cf_conn *cd; 480 struct mbuf *m; 481 size_t n; 482 483 cd = (struct cf_conn *)(xprt->xp_p1); 484 485 if (cd->strm_stat == XPRT_DIED) 486 return (XPRT_DIED); 487 488 /* 489 * Return XPRT_MOREREQS if we have buffered data and we are 490 * mid-record or if we have enough data for a record 491 * marker. Since this is only a hint, we read mpending and 492 * resid outside the lock. We do need to take the lock if we 493 * have to traverse the mbuf chain. 494 */ 495 if (cd->mpending) { 496 if (cd->resid) 497 return (XPRT_MOREREQS); 498 n = 0; 499 sx_xlock(&xprt->xp_lock); 500 m = cd->mpending; 501 while (m && n < sizeof(uint32_t)) { 502 n += m->m_len; 503 m = m->m_next; 504 } 505 sx_xunlock(&xprt->xp_lock); 506 if (n >= sizeof(uint32_t)) 507 return (XPRT_MOREREQS); 508 } 509 510 if (soreadable(xprt->xp_socket)) 511 return (XPRT_MOREREQS); 512 513 return (XPRT_IDLE); 514} 515 516static bool_t 517svc_vc_recv(SVCXPRT *xprt, struct rpc_msg *msg, 518 struct sockaddr **addrp, struct mbuf **mp) 519{ 520 struct cf_conn *cd = (struct cf_conn *) xprt->xp_p1; 521 struct uio uio; 522 struct mbuf *m; 523 XDR xdrs; 524 int error, rcvflag; 525 526 /* 527 * Serialise access to the socket and our own record parsing 528 * state. 529 */ 530 sx_xlock(&xprt->xp_lock); 531 532 for (;;) { 533 /* 534 * If we have an mbuf chain in cd->mpending, try to parse a 535 * record from it, leaving the result in cd->mreq. If we don't 536 * have a complete record, leave the partial result in 537 * cd->mreq and try to read more from the socket. 538 */ 539 if (cd->mpending) { 540 /* 541 * If cd->resid is non-zero, we have part of the 542 * record already, otherwise we are expecting a record 543 * marker. 544 */ 545 if (!cd->resid) { 546 /* 547 * See if there is enough data buffered to 548 * make up a record marker. Make sure we can 549 * handle the case where the record marker is 550 * split across more than one mbuf. 551 */ 552 size_t n = 0; 553 uint32_t header; 554 555 m = cd->mpending; 556 while (n < sizeof(uint32_t) && m) { 557 n += m->m_len; 558 m = m->m_next; 559 } 560 if (n < sizeof(uint32_t)) 561 goto readmore; 562 m_copydata(cd->mpending, 0, sizeof(header), 563 (char *)&header); 564 header = ntohl(header); 565 cd->eor = (header & 0x80000000) != 0; 566 cd->resid = header & 0x7fffffff; 567 m_adj(cd->mpending, sizeof(uint32_t)); 568 } 569 570 /* 571 * Start pulling off mbufs from cd->mpending 572 * until we either have a complete record or 573 * we run out of data. We use m_split to pull 574 * data - it will pull as much as possible and 575 * split the last mbuf if necessary. 576 */ 577 while (cd->mpending && cd->resid) { 578 m = cd->mpending; 579 if (cd->mpending->m_next 580 || cd->mpending->m_len > cd->resid) 581 cd->mpending = m_split(cd->mpending, 582 cd->resid, M_WAIT); 583 else 584 cd->mpending = NULL; 585 if (cd->mreq) 586 m_last(cd->mreq)->m_next = m; 587 else 588 cd->mreq = m; 589 while (m) { 590 cd->resid -= m->m_len; 591 m = m->m_next; 592 } 593 } 594 595 /* 596 * If cd->resid is zero now, we have managed to 597 * receive a record fragment from the stream. Check 598 * for the end-of-record mark to see if we need more. 599 */ 600 if (cd->resid == 0) { 601 if (!cd->eor) 602 continue; 603 604 /* 605 * Success - we have a complete record in 606 * cd->mreq. 607 */ 608 xdrmbuf_create(&xdrs, cd->mreq, XDR_DECODE); 609 cd->mreq = NULL; 610 sx_xunlock(&xprt->xp_lock); 611 612 if (! xdr_callmsg(&xdrs, msg)) { 613 XDR_DESTROY(&xdrs); 614 return (FALSE); 615 } 616 617 *addrp = NULL; 618 *mp = xdrmbuf_getall(&xdrs); 619 XDR_DESTROY(&xdrs); 620 621 return (TRUE); 622 } 623 } 624 625 readmore: 626 /* 627 * The socket upcall calls xprt_active() which will eventually 628 * cause the server to call us here. We attempt to 629 * read as much as possible from the socket and put 630 * the result in cd->mpending. If the read fails, 631 * we have drained both cd->mpending and the socket so 632 * we can call xprt_inactive(). 633 */ 634 uio.uio_resid = 1000000000; 635 uio.uio_td = curthread; 636 m = NULL; 637 rcvflag = MSG_DONTWAIT; 638 CURVNET_SET(xprt->xp_socket->so_vnet); 639 error = soreceive(xprt->xp_socket, NULL, &uio, &m, NULL, 640 &rcvflag); 641 CURVNET_RESTORE(); 642 643 if (error == EWOULDBLOCK) { 644 /* 645 * We must re-test for readability after 646 * taking the lock to protect us in the case 647 * where a new packet arrives on the socket 648 * after our call to soreceive fails with 649 * EWOULDBLOCK. The pool lock protects us from 650 * racing the upcall after our soreadable() 651 * call returns false. 652 */ 653 mtx_lock(&xprt->xp_pool->sp_lock); 654 if (!soreadable(xprt->xp_socket)) 655 xprt_inactive_locked(xprt); 656 mtx_unlock(&xprt->xp_pool->sp_lock); 657 sx_xunlock(&xprt->xp_lock); 658 return (FALSE); 659 } 660 661 if (error) { 662 SOCKBUF_LOCK(&xprt->xp_socket->so_rcv); 663 if (xprt->xp_upcallset) { 664 xprt->xp_upcallset = 0; 665 soupcall_clear(xprt->xp_socket, SO_RCV); 666 } 667 SOCKBUF_UNLOCK(&xprt->xp_socket->so_rcv); 668 xprt_inactive(xprt); 669 cd->strm_stat = XPRT_DIED; 670 sx_xunlock(&xprt->xp_lock); 671 return (FALSE); 672 } 673 674 if (!m) { 675 /* 676 * EOF - the other end has closed the socket. 677 */ 678 xprt_inactive(xprt); 679 cd->strm_stat = XPRT_DIED; 680 sx_xunlock(&xprt->xp_lock); 681 return (FALSE); 682 } 683 684 if (cd->mpending) 685 m_last(cd->mpending)->m_next = m; 686 else 687 cd->mpending = m; 688 } 689} 690 691static bool_t 692svc_vc_reply(SVCXPRT *xprt, struct rpc_msg *msg, 693 struct sockaddr *addr, struct mbuf *m) 694{ 695 XDR xdrs; 696 struct mbuf *mrep; 697 bool_t stat = TRUE; 698 int error; 699 700 /* 701 * Leave space for record mark. 702 */ 703 MGETHDR(mrep, M_WAIT, MT_DATA); 704 mrep->m_len = 0; 705 mrep->m_data += sizeof(uint32_t); 706 707 xdrmbuf_create(&xdrs, mrep, XDR_ENCODE); 708 709 if (msg->rm_reply.rp_stat == MSG_ACCEPTED && 710 msg->rm_reply.rp_acpt.ar_stat == SUCCESS) { 711 if (!xdr_replymsg(&xdrs, msg)) 712 stat = FALSE; 713 else 714 xdrmbuf_append(&xdrs, m); 715 } else { 716 stat = xdr_replymsg(&xdrs, msg); 717 } 718 719 if (stat) { 720 m_fixhdr(mrep); 721 722 /* 723 * Prepend a record marker containing the reply length. 724 */ 725 M_PREPEND(mrep, sizeof(uint32_t), M_WAIT); 726 *mtod(mrep, uint32_t *) = 727 htonl(0x80000000 | (mrep->m_pkthdr.len 728 - sizeof(uint32_t))); 729 error = sosend(xprt->xp_socket, NULL, NULL, mrep, NULL, 730 0, curthread); 731 if (!error) { 732 stat = TRUE; 733 } 734 } else { 735 m_freem(mrep); 736 } 737 738 XDR_DESTROY(&xdrs); 739 xprt->xp_p2 = NULL; 740 741 return (stat); 742} 743 744static bool_t 745svc_vc_null() 746{ 747 748 return (FALSE); 749} 750 751static int 752svc_vc_soupcall(struct socket *so, void *arg, int waitflag) 753{ 754 SVCXPRT *xprt = (SVCXPRT *) arg; 755 756 xprt_active(xprt); 757 return (SU_OK); 758} 759 760#if 0 761/* 762 * Get the effective UID of the sending process. Used by rpcbind, keyserv 763 * and rpc.yppasswdd on AF_LOCAL. 764 */ 765int 766__rpc_get_local_uid(SVCXPRT *transp, uid_t *uid) { 767 int sock, ret; 768 gid_t egid; 769 uid_t euid; 770 struct sockaddr *sa; 771 772 sock = transp->xp_fd; 773 sa = (struct sockaddr *)transp->xp_rtaddr; 774 if (sa->sa_family == AF_LOCAL) { 775 ret = getpeereid(sock, &euid, &egid); 776 if (ret == 0) 777 *uid = euid; 778 return (ret); 779 } else 780 return (-1); 781} 782#endif 783