ipx_usrreq.c revision 139823
1/*- 2 * Copyright (c) 2004-2005 Robert N. M. Watson 3 * Copyright (c) 1995, Mike Mitchell 4 * Copyright (c) 1984, 1985, 1986, 1987, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * @(#)ipx_usrreq.c 36 */ 37 38#include <sys/cdefs.h> 39__FBSDID("$FreeBSD: head/sys/netipx/ipx_usrreq.c 139823 2005-01-07 01:45:51Z imp $"); 40 41#include "opt_ipx.h" 42 43#include <sys/param.h> 44#include <sys/kernel.h> 45#include <sys/lock.h> 46#include <sys/mbuf.h> 47#include <sys/protosw.h> 48#include <sys/signalvar.h> 49#include <sys/socket.h> 50#include <sys/socketvar.h> 51#include <sys/sx.h> 52#include <sys/sysctl.h> 53#include <sys/systm.h> 54 55#include <net/if.h> 56#include <net/route.h> 57 58#include <netinet/in.h> 59 60#include <netipx/ipx.h> 61#include <netipx/ipx_if.h> 62#include <netipx/ipx_ip.h> 63#include <netipx/ipx_pcb.h> 64#include <netipx/ipx_var.h> 65 66/* 67 * IPX protocol implementation. 68 */ 69 70static int ipxsendspace = IPXSNDQ; 71SYSCTL_INT(_net_ipx_ipx, OID_AUTO, ipxsendspace, CTLFLAG_RW, 72 &ipxsendspace, 0, ""); 73static int ipxrecvspace = IPXRCVQ; 74SYSCTL_INT(_net_ipx_ipx, OID_AUTO, ipxrecvspace, CTLFLAG_RW, 75 &ipxrecvspace, 0, ""); 76 77static int ipx_usr_abort(struct socket *so); 78static int ipx_attach(struct socket *so, int proto, struct thread *td); 79static int ipx_bind(struct socket *so, struct sockaddr *nam, struct thread *td); 80static int ipx_connect(struct socket *so, struct sockaddr *nam, 81 struct thread *td); 82static int ipx_detach(struct socket *so); 83static int ipx_disconnect(struct socket *so); 84static int ipx_send(struct socket *so, int flags, struct mbuf *m, 85 struct sockaddr *addr, struct mbuf *control, 86 struct thread *td); 87static int ipx_shutdown(struct socket *so); 88static int ripx_attach(struct socket *so, int proto, struct thread *td); 89static int ipx_output(struct ipxpcb *ipxp, struct mbuf *m0); 90 91struct pr_usrreqs ipx_usrreqs = { 92 .pru_abort = ipx_usr_abort, 93 .pru_attach = ipx_attach, 94 .pru_bind = ipx_bind, 95 .pru_connect = ipx_connect, 96 .pru_control = ipx_control, 97 .pru_detach = ipx_detach, 98 .pru_disconnect = ipx_disconnect, 99 .pru_peeraddr = ipx_peeraddr, 100 .pru_send = ipx_send, 101 .pru_shutdown = ipx_shutdown, 102 .pru_sockaddr = ipx_sockaddr, 103}; 104 105struct pr_usrreqs ripx_usrreqs = { 106 .pru_abort = ipx_usr_abort, 107 .pru_attach = ripx_attach, 108 .pru_bind = ipx_bind, 109 .pru_connect = ipx_connect, 110 .pru_control = ipx_control, 111 .pru_detach = ipx_detach, 112 .pru_disconnect = ipx_disconnect, 113 .pru_peeraddr = ipx_peeraddr, 114 .pru_send = ipx_send, 115 .pru_shutdown = ipx_shutdown, 116 .pru_sockaddr = ipx_sockaddr, 117}; 118 119/* 120 * This may also be called for raw listeners. 121 */ 122void 123ipx_input(m, ipxp) 124 struct mbuf *m; 125 register struct ipxpcb *ipxp; 126{ 127 register struct ipx *ipx = mtod(m, struct ipx *); 128 struct ifnet *ifp = m->m_pkthdr.rcvif; 129 struct sockaddr_ipx ipx_ipx; 130 131 KASSERT(ipxp != NULL, ("ipx_input: NULL ipxpcb")); 132 /* 133 * Construct sockaddr format source address. 134 * Stuff source address and datagram in user buffer. 135 */ 136 ipx_ipx.sipx_len = sizeof(ipx_ipx); 137 ipx_ipx.sipx_family = AF_IPX; 138 ipx_ipx.sipx_addr = ipx->ipx_sna; 139 ipx_ipx.sipx_zero[0] = '\0'; 140 ipx_ipx.sipx_zero[1] = '\0'; 141 if (ipx_neteqnn(ipx->ipx_sna.x_net, ipx_zeronet) && ifp != NULL) { 142 register struct ifaddr *ifa; 143 144 for (ifa = TAILQ_FIRST(&ifp->if_addrhead); ifa != NULL; 145 ifa = TAILQ_NEXT(ifa, ifa_link)) { 146 if (ifa->ifa_addr->sa_family == AF_IPX) { 147 ipx_ipx.sipx_addr.x_net = 148 IA_SIPX(ifa)->sipx_addr.x_net; 149 break; 150 } 151 } 152 } 153 ipxp->ipxp_rpt = ipx->ipx_pt; 154 if ((ipxp->ipxp_flags & IPXP_RAWIN) == 0) { 155 m->m_len -= sizeof(struct ipx); 156 m->m_pkthdr.len -= sizeof(struct ipx); 157 m->m_data += sizeof(struct ipx); 158 } 159 if (sbappendaddr(&ipxp->ipxp_socket->so_rcv, 160 (struct sockaddr *)&ipx_ipx, m, NULL) == 0) 161 m_freem(m); 162 else 163 sorwakeup(ipxp->ipxp_socket); 164} 165 166/* 167 * Drop connection, reporting 168 * the specified error. 169 */ 170void 171ipx_drop(ipxp, errno) 172 register struct ipxpcb *ipxp; 173 int errno; 174{ 175 struct socket *so = ipxp->ipxp_socket; 176 177 /* 178 * someday, in the IPX world 179 * we will generate error protocol packets 180 * announcing that the socket has gone away. 181 * 182 * XXX Probably never. IPX does not have error packets. 183 */ 184 /*if (TCPS_HAVERCVDSYN(tp->t_state)) { 185 tp->t_state = TCPS_CLOSED; 186 tcp_output(tp); 187 }*/ 188 so->so_error = errno; 189 ipx_pcbdisconnect(ipxp); 190 soisdisconnected(so); 191} 192 193static int 194ipx_output(ipxp, m0) 195 struct ipxpcb *ipxp; 196 struct mbuf *m0; 197{ 198 register struct ipx *ipx; 199 register struct socket *so; 200 register int len = 0; 201 register struct route *ro; 202 struct mbuf *m; 203 struct mbuf *mprev = NULL; 204 205 /* 206 * Calculate data length. 207 */ 208 for (m = m0; m != NULL; m = m->m_next) { 209 mprev = m; 210 len += m->m_len; 211 } 212 /* 213 * Make sure packet is actually of even length. 214 */ 215 216 if (len & 1) { 217 m = mprev; 218 if ((m->m_flags & M_EXT) == 0 && 219 (m->m_len + m->m_data < &m->m_dat[MLEN])) { 220 mtod(m, char*)[m->m_len++] = 0; 221 } else { 222 struct mbuf *m1 = m_get(M_DONTWAIT, MT_DATA); 223 224 if (m1 == NULL) { 225 m_freem(m0); 226 return (ENOBUFS); 227 } 228 m1->m_len = 1; 229 * mtod(m1, char *) = 0; 230 m->m_next = m1; 231 } 232 m0->m_pkthdr.len++; 233 } 234 235 /* 236 * Fill in mbuf with extended IPX header 237 * and addresses and length put into network format. 238 */ 239 m = m0; 240 if (ipxp->ipxp_flags & IPXP_RAWOUT) { 241 ipx = mtod(m, struct ipx *); 242 } else { 243 M_PREPEND(m, sizeof(struct ipx), M_DONTWAIT); 244 if (m == NULL) 245 return (ENOBUFS); 246 ipx = mtod(m, struct ipx *); 247 ipx->ipx_tc = 0; 248 ipx->ipx_pt = ipxp->ipxp_dpt; 249 ipx->ipx_sna = ipxp->ipxp_laddr; 250 ipx->ipx_dna = ipxp->ipxp_faddr; 251 len += sizeof(struct ipx); 252 } 253 254 ipx->ipx_len = htons((u_short)len); 255 256 if (ipxp->ipxp_flags & IPXP_CHECKSUM) { 257 ipx->ipx_sum = ipx_cksum(m, len); 258 } else 259 ipx->ipx_sum = 0xffff; 260 261 /* 262 * Output datagram. 263 */ 264 so = ipxp->ipxp_socket; 265 if (so->so_options & SO_DONTROUTE) 266 return (ipx_outputfl(m, (struct route *)NULL, 267 (so->so_options & SO_BROADCAST) | IPX_ROUTETOIF)); 268 /* 269 * Use cached route for previous datagram if 270 * possible. If the previous net was the same 271 * and the interface was a broadcast medium, or 272 * if the previous destination was identical, 273 * then we are ok. 274 * 275 * NB: We don't handle broadcasts because that 276 * would require 3 subroutine calls. 277 */ 278 ro = &ipxp->ipxp_route; 279#ifdef ancient_history 280 /* 281 * I think that this will all be handled in ipx_pcbconnect! 282 */ 283 if (ro->ro_rt != NULL) { 284 if(ipx_neteq(ipxp->ipxp_lastdst, ipx->ipx_dna)) { 285 /* 286 * This assumes we have no GH type routes 287 */ 288 if (ro->ro_rt->rt_flags & RTF_HOST) { 289 if (!ipx_hosteq(ipxp->ipxp_lastdst, ipx->ipx_dna)) 290 goto re_route; 291 292 } 293 if ((ro->ro_rt->rt_flags & RTF_GATEWAY) == 0) { 294 register struct ipx_addr *dst = 295 &satoipx_addr(ro->ro_dst); 296 dst->x_host = ipx->ipx_dna.x_host; 297 } 298 /* 299 * Otherwise, we go through the same gateway 300 * and dst is already set up. 301 */ 302 } else { 303 re_route: 304 RTFREE(ro->ro_rt); 305 ro->ro_rt = NULL; 306 } 307 } 308 ipxp->ipxp_lastdst = ipx->ipx_dna; 309#endif /* ancient_history */ 310 return (ipx_outputfl(m, ro, so->so_options & SO_BROADCAST)); 311} 312 313int 314ipx_ctloutput(so, sopt) 315 struct socket *so; 316 struct sockopt *sopt; 317{ 318 struct ipxpcb *ipxp = sotoipxpcb(so); 319 int mask, error, optval; 320 short soptval; 321 struct ipx ioptval; 322 323 error = 0; 324 if (ipxp == NULL) 325 return (EINVAL); 326 327 switch (sopt->sopt_dir) { 328 case SOPT_GET: 329 switch (sopt->sopt_name) { 330 case SO_ALL_PACKETS: 331 mask = IPXP_ALL_PACKETS; 332 goto get_flags; 333 334 case SO_HEADERS_ON_INPUT: 335 mask = IPXP_RAWIN; 336 goto get_flags; 337 338 case SO_IPX_CHECKSUM: 339 mask = IPXP_CHECKSUM; 340 goto get_flags; 341 342 case SO_HEADERS_ON_OUTPUT: 343 mask = IPXP_RAWOUT; 344 get_flags: 345 soptval = ipxp->ipxp_flags & mask; 346 error = sooptcopyout(sopt, &soptval, sizeof soptval); 347 break; 348 349 case SO_DEFAULT_HEADERS: 350 ioptval.ipx_len = 0; 351 ioptval.ipx_sum = 0; 352 ioptval.ipx_tc = 0; 353 ioptval.ipx_pt = ipxp->ipxp_dpt; 354 ioptval.ipx_dna = ipxp->ipxp_faddr; 355 ioptval.ipx_sna = ipxp->ipxp_laddr; 356 error = sooptcopyout(sopt, &soptval, sizeof soptval); 357 break; 358 359 case SO_SEQNO: 360 error = sooptcopyout(sopt, &ipx_pexseq, 361 sizeof ipx_pexseq); 362 ipx_pexseq++; 363 break; 364 365 default: 366 error = EINVAL; 367 } 368 break; 369 370 case SOPT_SET: 371 switch (sopt->sopt_name) { 372 case SO_ALL_PACKETS: 373 mask = IPXP_ALL_PACKETS; 374 goto set_head; 375 376 case SO_HEADERS_ON_INPUT: 377 mask = IPXP_RAWIN; 378 goto set_head; 379 380 case SO_IPX_CHECKSUM: 381 mask = IPXP_CHECKSUM; 382 383 case SO_HEADERS_ON_OUTPUT: 384 mask = IPXP_RAWOUT; 385 set_head: 386 error = sooptcopyin(sopt, &optval, sizeof optval, 387 sizeof optval); 388 if (error) 389 break; 390 if (optval) 391 ipxp->ipxp_flags |= mask; 392 else 393 ipxp->ipxp_flags &= ~mask; 394 break; 395 396 case SO_DEFAULT_HEADERS: 397 error = sooptcopyin(sopt, &ioptval, sizeof ioptval, 398 sizeof ioptval); 399 if (error) 400 break; 401 ipxp->ipxp_dpt = ioptval.ipx_pt; 402 break; 403#ifdef IPXIP 404 case SO_IPXIP_ROUTE: 405 error = ipxip_route(so, sopt); 406 break; 407#endif /* IPXIP */ 408 default: 409 error = EINVAL; 410 } 411 break; 412 } 413 return (error); 414} 415 416static int 417ipx_usr_abort(so) 418 struct socket *so; 419{ 420 int s; 421 struct ipxpcb *ipxp = sotoipxpcb(so); 422 423 s = splnet(); 424 ipx_pcbdetach(ipxp); 425 splx(s); 426 soisdisconnected(so); 427 ACCEPT_LOCK(); 428 SOCK_LOCK(so); 429 sotryfree(so); 430 return (0); 431} 432 433static int 434ipx_attach(so, proto, td) 435 struct socket *so; 436 int proto; 437 struct thread *td; 438{ 439 int error; 440 int s; 441 struct ipxpcb *ipxp = sotoipxpcb(so); 442 443 if (ipxp != NULL) 444 return (EINVAL); 445 s = splnet(); 446 error = ipx_pcballoc(so, &ipxpcb_list, td); 447 splx(s); 448 if (error == 0) 449 error = soreserve(so, ipxsendspace, ipxrecvspace); 450 return (error); 451} 452 453static int 454ipx_bind(so, nam, td) 455 struct socket *so; 456 struct sockaddr *nam; 457 struct thread *td; 458{ 459 struct ipxpcb *ipxp = sotoipxpcb(so); 460 461 return (ipx_pcbbind(ipxp, nam, td)); 462} 463 464static int 465ipx_connect(so, nam, td) 466 struct socket *so; 467 struct sockaddr *nam; 468 struct thread *td; 469{ 470 int error; 471 int s; 472 struct ipxpcb *ipxp = sotoipxpcb(so); 473 474 if (!ipx_nullhost(ipxp->ipxp_faddr)) 475 return (EISCONN); 476 s = splnet(); 477 error = ipx_pcbconnect(ipxp, nam, td); 478 splx(s); 479 if (error == 0) 480 soisconnected(so); 481 return (error); 482} 483 484static int 485ipx_detach(so) 486 struct socket *so; 487{ 488 int s; 489 struct ipxpcb *ipxp = sotoipxpcb(so); 490 491 if (ipxp == NULL) 492 return (ENOTCONN); 493 s = splnet(); 494 ipx_pcbdetach(ipxp); 495 splx(s); 496 return (0); 497} 498 499static int 500ipx_disconnect(so) 501 struct socket *so; 502{ 503 int s; 504 struct ipxpcb *ipxp = sotoipxpcb(so); 505 506 if (ipx_nullhost(ipxp->ipxp_faddr)) 507 return (ENOTCONN); 508 s = splnet(); 509 ipx_pcbdisconnect(ipxp); 510 splx(s); 511 soisdisconnected(so); 512 return (0); 513} 514 515int 516ipx_peeraddr(so, nam) 517 struct socket *so; 518 struct sockaddr **nam; 519{ 520 struct ipxpcb *ipxp = sotoipxpcb(so); 521 522 ipx_setpeeraddr(ipxp, nam); 523 return (0); 524} 525 526static int 527ipx_send(so, flags, m, nam, control, td) 528 struct socket *so; 529 int flags; 530 struct mbuf *m; 531 struct sockaddr *nam; 532 struct mbuf *control; 533 struct thread *td; 534{ 535 int error; 536 struct ipxpcb *ipxp = sotoipxpcb(so); 537 struct ipx_addr laddr; 538 int s = 0; 539 540 if (nam != NULL) { 541 laddr = ipxp->ipxp_laddr; 542 if (!ipx_nullhost(ipxp->ipxp_faddr)) { 543 error = EISCONN; 544 goto send_release; 545 } 546 /* 547 * Must block input while temporarily connected. 548 */ 549 s = splnet(); 550 error = ipx_pcbconnect(ipxp, nam, td); 551 if (error) { 552 splx(s); 553 goto send_release; 554 } 555 } else { 556 if (ipx_nullhost(ipxp->ipxp_faddr)) { 557 error = ENOTCONN; 558 goto send_release; 559 } 560 } 561 error = ipx_output(ipxp, m); 562 m = NULL; 563 if (nam != NULL) { 564 ipx_pcbdisconnect(ipxp); 565 splx(s); 566 ipxp->ipxp_laddr = laddr; 567 } 568 569send_release: 570 if (m != NULL) 571 m_freem(m); 572 return (error); 573} 574 575static int 576ipx_shutdown(so) 577 struct socket *so; 578{ 579 socantsendmore(so); 580 return (0); 581} 582 583int 584ipx_sockaddr(so, nam) 585 struct socket *so; 586 struct sockaddr **nam; 587{ 588 struct ipxpcb *ipxp = sotoipxpcb(so); 589 590 ipx_setsockaddr(ipxp, nam); 591 return (0); 592} 593 594static int 595ripx_attach(so, proto, td) 596 struct socket *so; 597 int proto; 598 struct thread *td; 599{ 600 int error = 0; 601 int s; 602 struct ipxpcb *ipxp = sotoipxpcb(so); 603 604 if (td != NULL && (error = suser(td)) != 0) 605 return (error); 606 s = splnet(); 607 error = ipx_pcballoc(so, &ipxrawpcb_list, td); 608 splx(s); 609 if (error) 610 return (error); 611 error = soreserve(so, ipxsendspace, ipxrecvspace); 612 if (error) 613 return (error); 614 ipxp = sotoipxpcb(so); 615 ipxp->ipxp_faddr.x_host = ipx_broadhost; 616 ipxp->ipxp_flags = IPXP_RAWIN | IPXP_RAWOUT; 617 return (error); 618} 619