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/systm.h> 58 #include <sys/uio.h> 59 #include <netinet/tcp.h> 60 61 #include <rpc/rpc.h> 62 63 #include <rpc/rpc_com.h> 64 65 static bool_t svc_vc_rendezvous_recv(SVCXPRT *, struct rpc_msg *); 66 static enum xprt_stat svc_vc_rendezvous_stat(SVCXPRT *); 67 static void svc_vc_rendezvous_destroy(SVCXPRT *); 68 static bool_t svc_vc_null(void); 69 static void svc_vc_destroy(SVCXPRT *); 70 static enum xprt_stat svc_vc_stat(SVCXPRT *); 71 static bool_t svc_vc_recv(SVCXPRT *, struct rpc_msg *); 72 static bool_t svc_vc_getargs(SVCXPRT *, xdrproc_t, void *); 73 static bool_t svc_vc_freeargs(SVCXPRT *, xdrproc_t, void *); 74 static bool_t svc_vc_reply(SVCXPRT *, struct rpc_msg *); 75 static bool_t svc_vc_control(SVCXPRT *xprt, const u_int rq, void *in); 76 static bool_t svc_vc_rendezvous_control (SVCXPRT *xprt, const u_int rq, 77 void *in); 78 static SVCXPRT *svc_vc_create_conn(SVCPOOL *pool, struct socket *so, 79 struct sockaddr *raddr); 80 static int svc_vc_accept(struct socket *head, struct socket **sop); 81 static void svc_vc_soupcall(struct socket *so, void *arg, int waitflag); 82 83 static struct xp_ops svc_vc_rendezvous_ops = { 84 .xp_recv = svc_vc_rendezvous_recv, 85 .xp_stat = svc_vc_rendezvous_stat, 86 .xp_getargs = (bool_t (*)(SVCXPRT *, xdrproc_t, void *))svc_vc_null, 87 .xp_reply = (bool_t (*)(SVCXPRT *, struct rpc_msg *))svc_vc_null, 88 .xp_freeargs = (bool_t (*)(SVCXPRT *, xdrproc_t, void *))svc_vc_null, 89 .xp_destroy = svc_vc_rendezvous_destroy, 90 .xp_control = svc_vc_rendezvous_control 91 }; 92 93 static struct xp_ops svc_vc_ops = { 94 .xp_recv = svc_vc_recv, 95 .xp_stat = svc_vc_stat, 96 .xp_getargs = svc_vc_getargs, 97 .xp_reply = svc_vc_reply, 98 .xp_freeargs = svc_vc_freeargs, 99 .xp_destroy = svc_vc_destroy, 100 .xp_control = svc_vc_control 101 }; 102 103 struct cf_conn { /* kept in xprt->xp_p1 for actual connection */ 104 enum xprt_stat strm_stat; 105 struct mbuf *mpending; /* unparsed data read from the socket */ 106 struct mbuf *mreq; /* current record being built from mpending */ 107 uint32_t resid; /* number of bytes needed for fragment */ 108 bool_t eor; /* reading last fragment of current record */ 109 }; 110 111 /* 112 * Usage: 113 * xprt = svc_vc_create(sock, send_buf_size, recv_buf_size); 114 * 115 * Creates, registers, and returns a (rpc) tcp based transporter. 116 * Once *xprt is initialized, it is registered as a transporter 117 * see (svc.h, xprt_register). This routine returns 118 * a NULL if a problem occurred. 119 * 120 * The filedescriptor passed in is expected to refer to a bound, but 121 * not yet connected socket. 122 * 123 * Since streams do buffered io similar to stdio, the caller can specify 124 * how big the send and receive buffers are via the second and third parms; 125 * 0 => use the system default. 126 */ 127 SVCXPRT * 128 svc_vc_create(SVCPOOL *pool, struct socket *so, size_t sendsize, 129 size_t recvsize) 130 { 131 SVCXPRT *xprt; 132 struct sockaddr* sa; 133 int error; 134 135 if (so->so_state & SS_ISCONNECTED) { 136 error = so->so_proto->pr_usrreqs->pru_peeraddr(so, &sa); 137 if (error) 138 return (NULL); 139 xprt = svc_vc_create_conn(pool, so, sa); 140 free(sa, M_SONAME); 141 return (xprt); 142 } 143 144 xprt = mem_alloc(sizeof(SVCXPRT)); 145 mtx_init(&xprt->xp_lock, "xprt->xp_lock", NULL, MTX_DEF); 146 xprt->xp_pool = pool; 147 xprt->xp_socket = so; 148 xprt->xp_p1 = NULL; 149 xprt->xp_p2 = NULL; 150 xprt->xp_p3 = NULL; 151 xprt->xp_verf = _null_auth; 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 xprt->xp_ltaddr.buf = mem_alloc(sizeof (struct sockaddr_storage)); 159 xprt->xp_ltaddr.maxlen = sizeof (struct sockaddr_storage); 160 xprt->xp_ltaddr.len = sa->sa_len; 161 memcpy(xprt->xp_ltaddr.buf, sa, sa->sa_len); 162 free(sa, M_SONAME); 163 164 xprt->xp_rtaddr.maxlen = 0; 165 166 xprt_register(xprt); 167 168 solisten(so, SOMAXCONN, curthread); 169 170 SOCKBUF_LOCK(&so->so_rcv); 171 so->so_upcallarg = xprt; 172 so->so_upcall = svc_vc_soupcall; 173 so->so_rcv.sb_flags |= SB_UPCALL; 174 SOCKBUF_UNLOCK(&so->so_rcv); 175 176 return (xprt); 177 cleanup_svc_vc_create: 178 if (xprt) 179 mem_free(xprt, sizeof(*xprt)); 180 return (NULL); 181 } 182 183 /* 184 * Create a new transport for a socket optained via soaccept(). 185 */ 186 SVCXPRT * 187 svc_vc_create_conn(SVCPOOL *pool, struct socket *so, struct sockaddr *raddr) 188 { 189 SVCXPRT *xprt = NULL; 190 struct cf_conn *cd = NULL; 191 struct sockaddr* sa = NULL; 192 struct sockopt opt; 193 int one = 1; 194 int error; 195 196 bzero(&opt, sizeof(struct sockopt)); 197 opt.sopt_dir = SOPT_SET; 198 opt.sopt_level = SOL_SOCKET; 199 opt.sopt_name = SO_KEEPALIVE; 200 opt.sopt_val = &one; 201 opt.sopt_valsize = sizeof(one); 202 error = sosetopt(so, &opt); 203 if (error) 204 return (NULL); 205 206 if (so->so_proto->pr_protocol == IPPROTO_TCP) { 207 bzero(&opt, sizeof(struct sockopt)); 208 opt.sopt_dir = SOPT_SET; 209 opt.sopt_level = IPPROTO_TCP; 210 opt.sopt_name = TCP_NODELAY; 211 opt.sopt_val = &one; 212 opt.sopt_valsize = sizeof(one); 213 error = sosetopt(so, &opt); 214 if (error) 215 return (NULL); 216 } 217 218 cd = mem_alloc(sizeof(*cd)); 219 cd->strm_stat = XPRT_IDLE; 220 221 xprt = mem_alloc(sizeof(SVCXPRT)); 222 mtx_init(&xprt->xp_lock, "xprt->xp_lock", NULL, MTX_DEF); 223 xprt->xp_pool = pool; 224 xprt->xp_socket = so; 225 xprt->xp_p1 = cd; 226 xprt->xp_p2 = NULL; 227 xprt->xp_p3 = NULL; 228 xprt->xp_verf = _null_auth; 229 xprt->xp_ops = &svc_vc_ops; 230 231 xprt->xp_rtaddr.buf = mem_alloc(sizeof (struct sockaddr_storage)); 232 xprt->xp_rtaddr.maxlen = sizeof (struct sockaddr_storage); 233 xprt->xp_rtaddr.len = raddr->sa_len; 234 memcpy(xprt->xp_rtaddr.buf, raddr, raddr->sa_len); 235 236 error = so->so_proto->pr_usrreqs->pru_sockaddr(so, &sa); 237 if (error) 238 goto cleanup_svc_vc_create; 239 240 xprt->xp_ltaddr.buf = mem_alloc(sizeof (struct sockaddr_storage)); 241 xprt->xp_ltaddr.maxlen = sizeof (struct sockaddr_storage); 242 xprt->xp_ltaddr.len = sa->sa_len; 243 memcpy(xprt->xp_ltaddr.buf, sa, sa->sa_len); 244 free(sa, M_SONAME); 245 246 xprt_register(xprt); 247 248 SOCKBUF_LOCK(&so->so_rcv); 249 so->so_upcallarg = xprt; 250 so->so_upcall = svc_vc_soupcall; 251 so->so_rcv.sb_flags |= SB_UPCALL; 252 SOCKBUF_UNLOCK(&so->so_rcv); 253 254 /* 255 * Throw the transport into the active list in case it already 256 * has some data buffered. 257 */ 258 mtx_lock(&xprt->xp_lock); 259 xprt_active(xprt); 260 mtx_unlock(&xprt->xp_lock); 261 262 return (xprt); 263 cleanup_svc_vc_create: 264 if (xprt) { 265 if (xprt->xp_ltaddr.buf) 266 mem_free(xprt->xp_ltaddr.buf, 267 sizeof(struct sockaddr_storage)); 268 if (xprt->xp_rtaddr.buf) 269 mem_free(xprt->xp_rtaddr.buf, 270 sizeof(struct sockaddr_storage)); 271 mem_free(xprt, sizeof(*xprt)); 272 } 273 if (cd) 274 mem_free(cd, sizeof(*cd)); 275 return (NULL); 276 } 277 278 /* 279 * This does all of the accept except the final call to soaccept. The 280 * caller will call soaccept after dropping its locks (soaccept may 281 * call malloc). 282 */ 283 int 284 svc_vc_accept(struct socket *head, struct socket **sop) 285 { 286 int error = 0; 287 struct socket *so; 288 289 if ((head->so_options & SO_ACCEPTCONN) == 0) { 290 error = EINVAL; 291 goto done; 292 } 293 #ifdef MAC 294 SOCK_LOCK(head); 295 error = mac_socket_check_accept(td->td_ucred, head); 296 SOCK_UNLOCK(head); 297 if (error != 0) 298 goto done; 299 #endif 300 ACCEPT_LOCK(); 301 if (TAILQ_EMPTY(&head->so_comp)) { 302 ACCEPT_UNLOCK(); 303 error = EWOULDBLOCK; 304 goto done; 305 } 306 so = TAILQ_FIRST(&head->so_comp); 307 KASSERT(!(so->so_qstate & SQ_INCOMP), ("svc_vc_accept: so SQ_INCOMP")); 308 KASSERT(so->so_qstate & SQ_COMP, ("svc_vc_accept: so not SQ_COMP")); 309 310 /* 311 * Before changing the flags on the socket, we have to bump the 312 * reference count. Otherwise, if the protocol calls sofree(), 313 * the socket will be released due to a zero refcount. 314 * XXX might not need soref() since this is simpler than kern_accept. 315 */ 316 SOCK_LOCK(so); /* soref() and so_state update */ 317 soref(so); /* file descriptor reference */ 318 319 TAILQ_REMOVE(&head->so_comp, so, so_list); 320 head->so_qlen--; 321 so->so_state |= (head->so_state & SS_NBIO); 322 so->so_qstate &= ~SQ_COMP; 323 so->so_head = NULL; 324 325 SOCK_UNLOCK(so); 326 ACCEPT_UNLOCK(); 327 328 *sop = so; 329 330 /* connection has been removed from the listen queue */ 331 KNOTE_UNLOCKED(&head->so_rcv.sb_sel.si_note, 0); 332 done: 333 return (error); 334 } 335 336 /*ARGSUSED*/ 337 static bool_t 338 svc_vc_rendezvous_recv(SVCXPRT *xprt, struct rpc_msg *msg) 339 { 340 struct socket *so = NULL; 341 struct sockaddr *sa = NULL; 342 int error; 343 344 /* 345 * The socket upcall calls xprt_active() which will eventually 346 * cause the server to call us here. We attempt to accept a 347 * connection from the socket and turn it into a new 348 * transport. If the accept fails, we have drained all pending 349 * connections so we call xprt_inactive(). 350 * 351 * The lock protects us in the case where a new connection arrives 352 * on the socket after our call to accept fails with 353 * EWOULDBLOCK - the call to xprt_active() in the upcall will 354 * happen only after our call to xprt_inactive() which ensures 355 * that we will remain active. It might be possible to use 356 * SOCKBUF_LOCK for this - its not clear to me what locks are 357 * held during the upcall. 358 */ 359 mtx_lock(&xprt->xp_lock); 360 361 error = svc_vc_accept(xprt->xp_socket, &so); 362 363 if (error == EWOULDBLOCK) { 364 xprt_inactive(xprt); 365 mtx_unlock(&xprt->xp_lock); 366 return (FALSE); 367 } 368 369 if (error) { 370 SOCKBUF_LOCK(&xprt->xp_socket->so_rcv); 371 xprt->xp_socket->so_upcallarg = NULL; 372 xprt->xp_socket->so_upcall = NULL; 373 xprt->xp_socket->so_rcv.sb_flags &= ~SB_UPCALL; 374 SOCKBUF_UNLOCK(&xprt->xp_socket->so_rcv); 375 xprt_inactive(xprt); 376 mtx_unlock(&xprt->xp_lock); 377 return (FALSE); 378 } 379 380 mtx_unlock(&xprt->xp_lock); 381 382 sa = 0; 383 error = soaccept(so, &sa); 384 385 if (error) { 386 /* 387 * XXX not sure if I need to call sofree or soclose here. 388 */ 389 if (sa) 390 free(sa, M_SONAME); 391 return (FALSE); 392 } 393 394 /* 395 * svc_vc_create_conn will call xprt_register - we don't need 396 * to do anything with the new connection. 397 */ 398 if (!svc_vc_create_conn(xprt->xp_pool, so, sa)) 399 soclose(so); 400 401 free(sa, M_SONAME); 402 403 return (FALSE); /* there is never an rpc msg to be processed */ 404 } 405 406 /*ARGSUSED*/ 407 static enum xprt_stat 408 svc_vc_rendezvous_stat(SVCXPRT *xprt) 409 { 410 411 return (XPRT_IDLE); 412 } 413 414 static void 415 svc_vc_destroy_common(SVCXPRT *xprt) 416 { 417 SOCKBUF_LOCK(&xprt->xp_socket->so_rcv); 418 xprt->xp_socket->so_upcallarg = NULL; 419 xprt->xp_socket->so_upcall = NULL; 420 xprt->xp_socket->so_rcv.sb_flags &= ~SB_UPCALL; 421 SOCKBUF_UNLOCK(&xprt->xp_socket->so_rcv); 422 423 xprt_unregister(xprt); 424 425 mtx_destroy(&xprt->xp_lock); 426 if (xprt->xp_socket) 427 (void)soclose(xprt->xp_socket); 428 429 if (xprt->xp_rtaddr.buf) 430 (void) mem_free(xprt->xp_rtaddr.buf, xprt->xp_rtaddr.maxlen); 431 if (xprt->xp_ltaddr.buf) 432 (void) mem_free(xprt->xp_ltaddr.buf, xprt->xp_ltaddr.maxlen); 433 (void) mem_free(xprt, sizeof (SVCXPRT)); 434 435 } 436 437 static void 438 svc_vc_rendezvous_destroy(SVCXPRT *xprt) 439 { 440 441 svc_vc_destroy_common(xprt); 442 } 443 444 static void 445 svc_vc_destroy(SVCXPRT *xprt) 446 { 447 struct cf_conn *cd = (struct cf_conn *)xprt->xp_p1; 448 449 svc_vc_destroy_common(xprt); 450 451 if (cd->mreq) 452 m_freem(cd->mreq); 453 if (cd->mpending) 454 m_freem(cd->mpending); 455 mem_free(cd, sizeof(*cd)); 456 } 457 458 /*ARGSUSED*/ 459 static bool_t 460 svc_vc_control(SVCXPRT *xprt, const u_int rq, void *in) 461 { 462 return (FALSE); 463 } 464 465 static bool_t 466 svc_vc_rendezvous_control(SVCXPRT *xprt, const u_int rq, void *in) 467 { 468 469 return (FALSE); 470 } 471 472 static enum xprt_stat 473 svc_vc_stat(SVCXPRT *xprt) 474 { 475 struct cf_conn *cd; 476 struct mbuf *m; 477 size_t n; 478 479 cd = (struct cf_conn *)(xprt->xp_p1); 480 481 if (cd->strm_stat == XPRT_DIED) 482 return (XPRT_DIED); 483 484 /* 485 * Return XPRT_MOREREQS if we have buffered data and we are 486 * mid-record or if we have enough data for a record marker. 487 */ 488 if (cd->mpending) { 489 if (cd->resid) 490 return (XPRT_MOREREQS); 491 n = 0; 492 m = cd->mpending; 493 while (m && n < sizeof(uint32_t)) { 494 n += m->m_len; 495 m = m->m_next; 496 } 497 if (n >= sizeof(uint32_t)) 498 return (XPRT_MOREREQS); 499 } 500 501 return (XPRT_IDLE); 502 } 503 504 static bool_t 505 svc_vc_recv(SVCXPRT *xprt, struct rpc_msg *msg) 506 { 507 struct cf_conn *cd = (struct cf_conn *) xprt->xp_p1; 508 struct uio uio; 509 struct mbuf *m; 510 int error, rcvflag; 511 512 for (;;) { 513 /* 514 * If we have an mbuf chain in cd->mpending, try to parse a 515 * record from it, leaving the result in cd->mreq. If we don't 516 * have a complete record, leave the partial result in 517 * cd->mreq and try to read more from the socket. 518 */ 519 if (cd->mpending) { 520 /* 521 * If cd->resid is non-zero, we have part of the 522 * record already, otherwise we are expecting a record 523 * marker. 524 */ 525 if (!cd->resid) { 526 /* 527 * See if there is enough data buffered to 528 * make up a record marker. Make sure we can 529 * handle the case where the record marker is 530 * split across more than one mbuf. 531 */ 532 size_t n = 0; 533 uint32_t header; 534 535 m = cd->mpending; 536 while (n < sizeof(uint32_t) && m) { 537 n += m->m_len; 538 m = m->m_next; 539 } 540 if (n < sizeof(uint32_t)) 541 goto readmore; 542 cd->mpending = m_pullup(cd->mpending, sizeof(uint32_t)); 543 memcpy(&header, mtod(cd->mpending, uint32_t *), 544 sizeof(header)); 545 header = ntohl(header); 546 cd->eor = (header & 0x80000000) != 0; 547 cd->resid = header & 0x7fffffff; 548 m_adj(cd->mpending, sizeof(uint32_t)); 549 } 550 551 /* 552 * Start pulling off mbufs from cd->mpending 553 * until we either have a complete record or 554 * we run out of data. We use m_split to pull 555 * data - it will pull as much as possible and 556 * split the last mbuf if necessary. 557 */ 558 while (cd->mpending && cd->resid) { 559 m = cd->mpending; 560 cd->mpending = m_split(cd->mpending, cd->resid, 561 M_WAIT); 562 if (cd->mreq) 563 m_last(cd->mreq)->m_next = m; 564 else 565 cd->mreq = m; 566 while (m) { 567 cd->resid -= m->m_len; 568 m = m->m_next; 569 } 570 } 571 572 /* 573 * If cd->resid is zero now, we have managed to 574 * receive a record fragment from the stream. Check 575 * for the end-of-record mark to see if we need more. 576 */ 577 if (cd->resid == 0) { 578 if (!cd->eor) 579 continue; 580 581 /* 582 * Success - we have a complete record in 583 * cd->mreq. 584 */ 585 xdrmbuf_create(&xprt->xp_xdrreq, cd->mreq, XDR_DECODE); 586 cd->mreq = NULL; 587 if (! xdr_callmsg(&xprt->xp_xdrreq, msg)) { 588 XDR_DESTROY(&xprt->xp_xdrreq); 589 return (FALSE); 590 } 591 xprt->xp_xid = msg->rm_xid; 592 593 return (TRUE); 594 } 595 } 596 597 readmore: 598 /* 599 * The socket upcall calls xprt_active() which will eventually 600 * cause the server to call us here. We attempt to 601 * read as much as possible from the socket and put 602 * the result in cd->mpending. If the read fails, 603 * we have drained both cd->mpending and the socket so 604 * we can call xprt_inactive(). 605 * 606 * The lock protects us in the case where a new packet arrives 607 * on the socket after our call to soreceive fails with 608 * EWOULDBLOCK - the call to xprt_active() in the upcall will 609 * happen only after our call to xprt_inactive() which ensures 610 * that we will remain active. It might be possible to use 611 * SOCKBUF_LOCK for this - its not clear to me what locks are 612 * held during the upcall. 613 */ 614 mtx_lock(&xprt->xp_lock); 615 616 uio.uio_resid = 1000000000; 617 uio.uio_td = curthread; 618 m = NULL; 619 rcvflag = MSG_DONTWAIT; 620 error = soreceive(xprt->xp_socket, NULL, &uio, &m, NULL, 621 &rcvflag); 622 623 if (error == EWOULDBLOCK) { 624 xprt_inactive(xprt); 625 mtx_unlock(&xprt->xp_lock); 626 return (FALSE); 627 } 628 629 if (error) { 630 SOCKBUF_LOCK(&xprt->xp_socket->so_rcv); 631 xprt->xp_socket->so_upcallarg = NULL; 632 xprt->xp_socket->so_upcall = NULL; 633 xprt->xp_socket->so_rcv.sb_flags &= ~SB_UPCALL; 634 SOCKBUF_UNLOCK(&xprt->xp_socket->so_rcv); 635 xprt_inactive(xprt); 636 cd->strm_stat = XPRT_DIED; 637 mtx_unlock(&xprt->xp_lock); 638 return (FALSE); 639 } 640 641 if (!m) { 642 /* 643 * EOF - the other end has closed the socket. 644 */ 645 cd->strm_stat = XPRT_DIED; 646 mtx_unlock(&xprt->xp_lock); 647 return (FALSE); 648 } 649 650 if (cd->mpending) 651 m_last(cd->mpending)->m_next = m; 652 else 653 cd->mpending = m; 654 655 mtx_unlock(&xprt->xp_lock); 656 } 657 } 658 659 static bool_t 660 svc_vc_getargs(SVCXPRT *xprt, xdrproc_t xdr_args, void *args_ptr) 661 { 662 663 return (xdr_args(&xprt->xp_xdrreq, args_ptr)); 664 } 665 666 static bool_t 667 svc_vc_freeargs(SVCXPRT *xprt, xdrproc_t xdr_args, void *args_ptr) 668 { 669 XDR xdrs; 670 671 /* 672 * Free the request mbuf here - this allows us to handle 673 * protocols where not all requests have replies 674 * (i.e. NLM). Note that xdrmbuf_destroy handles being called 675 * twice correctly - the mbuf will only be freed once. 676 */ 677 XDR_DESTROY(&xprt->xp_xdrreq); 678 679 xdrs.x_op = XDR_FREE; 680 return (xdr_args(&xdrs, args_ptr)); 681 } 682 683 static bool_t 684 svc_vc_reply(SVCXPRT *xprt, struct rpc_msg *msg) 685 { 686 struct mbuf *mrep; 687 bool_t stat = FALSE; 688 int error; 689 690 /* 691 * Leave space for record mark. 692 */ 693 MGETHDR(mrep, M_WAIT, MT_DATA); 694 MCLGET(mrep, M_WAIT); 695 mrep->m_len = 0; 696 mrep->m_data += sizeof(uint32_t); 697 698 xdrmbuf_create(&xprt->xp_xdrrep, mrep, XDR_ENCODE); 699 msg->rm_xid = xprt->xp_xid; 700 if (xdr_replymsg(&xprt->xp_xdrrep, msg)) { 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 /* 720 * This frees the request mbuf chain as well. The reply mbuf 721 * chain was consumed by sosend. 722 */ 723 XDR_DESTROY(&xprt->xp_xdrreq); 724 XDR_DESTROY(&xprt->xp_xdrrep); 725 xprt->xp_p2 = NULL; 726 727 return (stat); 728 } 729 730 static bool_t 731 svc_vc_null() 732 { 733 734 return (FALSE); 735 } 736 737 static void 738 svc_vc_soupcall(struct socket *so, void *arg, int waitflag) 739 { 740 SVCXPRT *xprt = (SVCXPRT *) arg; 741 742 mtx_lock(&xprt->xp_lock); 743 xprt_active(xprt); 744 mtx_unlock(&xprt->xp_lock); 745 } 746 747 #if 0 748 /* 749 * Get the effective UID of the sending process. Used by rpcbind, keyserv 750 * and rpc.yppasswdd on AF_LOCAL. 751 */ 752 int 753 __rpc_get_local_uid(SVCXPRT *transp, uid_t *uid) { 754 int sock, ret; 755 gid_t egid; 756 uid_t euid; 757 struct sockaddr *sa; 758 759 sock = transp->xp_fd; 760 sa = (struct sockaddr *)transp->xp_rtaddr.buf; 761 if (sa->sa_family == AF_LOCAL) { 762 ret = getpeereid(sock, &euid, &egid); 763 if (ret == 0) 764 *uid = euid; 765 return (ret); 766 } else 767 return (-1); 768 } 769 #endif 770