ipx_usrreq.c revision 38482
1/* 2 * Copyright (c) 1995, Mike Mitchell 3 * Copyright (c) 1984, 1985, 1986, 1987, 1993 4 * The Regents of the University of California. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. All advertising materials mentioning features or use of this software 15 * must display the following acknowledgement: 16 * This product includes software developed by the University of 17 * California, Berkeley and its contributors. 18 * 4. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * @(#)ipx_usrreq.c 35 * 36 * $Id: ipx_usrreq.c,v 1.19 1998/02/09 06:10:25 eivind Exp $ 37 */ 38 39#include "opt_ipx.h" 40 41#include <sys/param.h> 42#include <sys/systm.h> 43#include <sys/kernel.h> 44#include <sys/mbuf.h> 45#include <sys/proc.h> 46#include <sys/protosw.h> 47#include <sys/socket.h> 48#include <sys/socketvar.h> 49#include <sys/sysctl.h> 50 51#include <net/if.h> 52#include <net/route.h> 53 54#include <netinet/in.h> 55 56#include <netipx/ipx.h> 57#include <netipx/ipx_pcb.h> 58#include <netipx/ipx_if.h> 59#include <netipx/ipx_var.h> 60#include <netipx/ipx_ip.h> 61 62/* 63 * IPX protocol implementation. 64 */ 65 66static int ipxsendspace = IPXSNDQ; 67SYSCTL_INT(_net_ipx_ipx, OID_AUTO, ipxsendspace, CTLFLAG_RW, 68 &ipxsendspace, 0, ""); 69static int ipxrecvspace = IPXRCVQ; 70SYSCTL_INT(_net_ipx_ipx, OID_AUTO, ipxrecvspace, CTLFLAG_RW, 71 &ipxrecvspace, 0, ""); 72 73static int ipx_usr_abort(struct socket *so); 74static int ipx_attach(struct socket *so, int proto, struct proc *p); 75static int ipx_bind(struct socket *so, struct sockaddr *nam, struct proc *p); 76static int ipx_connect(struct socket *so, struct sockaddr *nam, 77 struct proc *p); 78static int ipx_detach(struct socket *so); 79static int ipx_disconnect(struct socket *so); 80static int ipx_send(struct socket *so, int flags, struct mbuf *m, 81 struct sockaddr *addr, struct mbuf *control, 82 struct proc *p); 83static int ipx_shutdown(struct socket *so); 84static int ripx_attach(struct socket *so, int proto, struct proc *p); 85static int ipx_output(struct ipxpcb *ipxp, struct mbuf *m0); 86 87struct pr_usrreqs ipx_usrreqs = { 88 ipx_usr_abort, pru_accept_notsupp, ipx_attach, ipx_bind, 89 ipx_connect, pru_connect2_notsupp, ipx_control, ipx_detach, 90 ipx_disconnect, pru_listen_notsupp, ipx_peeraddr, pru_rcvd_notsupp, 91 pru_rcvoob_notsupp, ipx_send, pru_sense_null, ipx_shutdown, 92 ipx_sockaddr, sosend, soreceive, sopoll 93}; 94 95struct pr_usrreqs ripx_usrreqs = { 96 ipx_usr_abort, pru_accept_notsupp, ripx_attach, ipx_bind, 97 ipx_connect, pru_connect2_notsupp, ipx_control, ipx_detach, 98 ipx_disconnect, pru_listen_notsupp, ipx_peeraddr, pru_rcvd_notsupp, 99 pru_rcvoob_notsupp, ipx_send, pru_sense_null, ipx_shutdown, 100 ipx_sockaddr, sosend, soreceive, sopoll 101}; 102 103/* 104 * This may also be called for raw listeners. 105 */ 106void 107ipx_input(m, ipxp) 108 struct mbuf *m; 109 register struct ipxpcb *ipxp; 110{ 111 register struct ipx *ipx = mtod(m, struct ipx *); 112 struct ifnet *ifp = m->m_pkthdr.rcvif; 113 struct sockaddr_ipx ipx_ipx; 114 115 if (ipxp == NULL) 116 panic("No ipxpcb"); 117 /* 118 * Construct sockaddr format source address. 119 * Stuff source address and datagram in user buffer. 120 */ 121 ipx_ipx.sipx_len = sizeof(ipx_ipx); 122 ipx_ipx.sipx_family = AF_IPX; 123 ipx_ipx.sipx_addr = ipx->ipx_sna; 124 ipx_ipx.sipx_zero[0] = '\0'; 125 ipx_ipx.sipx_zero[1] = '\0'; 126 if (ipx_neteqnn(ipx->ipx_sna.x_net, ipx_zeronet) && ifp != NULL) { 127 register struct ifaddr *ifa; 128 129 for (ifa = ifp->if_addrhead.tqh_first; ifa != NULL; 130 ifa = ifa->ifa_link.tqe_next) { 131 if (ifa->ifa_addr->sa_family == AF_IPX) { 132 ipx_ipx.sipx_addr.x_net = 133 IA_SIPX(ifa)->sipx_addr.x_net; 134 break; 135 } 136 } 137 } 138 ipxp->ipxp_rpt = ipx->ipx_pt; 139 if (!(ipxp->ipxp_flags & IPXP_RAWIN) ) { 140 m->m_len -= sizeof(struct ipx); 141 m->m_pkthdr.len -= sizeof(struct ipx); 142 m->m_data += sizeof(struct ipx); 143 } 144 if (sbappendaddr(&ipxp->ipxp_socket->so_rcv, (struct sockaddr *)&ipx_ipx, 145 m, (struct mbuf *)NULL) == 0) 146 goto bad; 147 sorwakeup(ipxp->ipxp_socket); 148 return; 149bad: 150 m_freem(m); 151} 152 153void 154ipx_abort(ipxp) 155 struct ipxpcb *ipxp; 156{ 157 struct socket *so = ipxp->ipxp_socket; 158 159 ipx_pcbdisconnect(ipxp); 160 soisdisconnected(so); 161} 162 163/* 164 * Drop connection, reporting 165 * the specified error. 166 */ 167void 168ipx_drop(ipxp, errno) 169 register struct ipxpcb *ipxp; 170 int errno; 171{ 172 struct socket *so = ipxp->ipxp_socket; 173 174 /* 175 * someday, in the IPX world 176 * we will generate error protocol packets 177 * announcing that the socket has gone away. 178 * 179 * XXX Probably never. IPX does not have error packets. 180 */ 181 /*if (TCPS_HAVERCVDSYN(tp->t_state)) { 182 tp->t_state = TCPS_CLOSED; 183 tcp_output(tp); 184 }*/ 185 so->so_error = errno; 186 ipx_pcbdisconnect(ipxp); 187 soisdisconnected(so); 188} 189 190static int 191ipx_output(ipxp, m0) 192 struct ipxpcb *ipxp; 193 struct mbuf *m0; 194{ 195 register struct mbuf *m; 196 register struct ipx *ipx; 197 register struct socket *so; 198 register int len = 0; 199 register struct route *ro; 200 struct mbuf *mprev = NULL; 201 202 /* 203 * Calculate data length. 204 */ 205 for (m = m0; m != NULL; m = m->m_next) { 206 mprev = m; 207 len += m->m_len; 208 } 209 /* 210 * Make sure packet is actually of even length. 211 */ 212 213 if (len & 1) { 214 m = mprev; 215 if ((m->m_flags & M_EXT) == 0 && 216 (m->m_len + m->m_data < &m->m_dat[MLEN])) { 217 m->m_len++; 218 } else { 219 struct mbuf *m1 = m_get(M_DONTWAIT, MT_DATA); 220 221 if (m1 == NULL) { 222 m_freem(m0); 223 return (ENOBUFS); 224 } 225 m1->m_len = 1; 226 * mtod(m1, char *) = 0; 227 m->m_next = m1; 228 } 229 m0->m_pkthdr.len++; 230 } 231 232 /* 233 * Fill in mbuf with extended IPX header 234 * and addresses and length put into network format. 235 */ 236 m = m0; 237 if (ipxp->ipxp_flags & IPXP_RAWOUT) { 238 ipx = mtod(m, struct ipx *); 239 } else { 240 M_PREPEND(m, sizeof(struct ipx), M_DONTWAIT); 241 if (m == NULL) 242 return (ENOBUFS); 243 ipx = mtod(m, struct ipx *); 244 ipx->ipx_tc = 0; 245 ipx->ipx_pt = ipxp->ipxp_dpt; 246 ipx->ipx_sna = ipxp->ipxp_laddr; 247 ipx->ipx_dna = ipxp->ipxp_faddr; 248 len += sizeof(struct ipx); 249 } 250 251 ipx->ipx_len = htons((u_short)len); 252 253 if (ipxcksum) { 254 ipx->ipx_sum = 0; 255 len = ((len - 1) | 1) + 1; 256 ipx->ipx_sum = ipx_cksum(m, len); 257 } else 258 ipx->ipx_sum = 0xffff; 259 260 /* 261 * Output datagram. 262 */ 263 so = ipxp->ipxp_socket; 264 if (so->so_options & SO_DONTROUTE) 265 return (ipx_outputfl(m, (struct route *)NULL, 266 (so->so_options & SO_BROADCAST) | IPX_ROUTETOIF)); 267 /* 268 * Use cached route for previous datagram if 269 * possible. If the previous net was the same 270 * and the interface was a broadcast medium, or 271 * if the previous destination was identical, 272 * then we are ok. 273 * 274 * NB: We don't handle broadcasts because that 275 * would require 3 subroutine calls. 276 */ 277 ro = &ipxp->ipxp_route; 278#ifdef ancient_history 279 /* 280 * I think that this will all be handled in ipx_pcbconnect! 281 */ 282 if (ro->ro_rt != NULL) { 283 if(ipx_neteq(ipxp->ipxp_lastdst, ipx->ipx_dna)) { 284 /* 285 * This assumes we have no GH type routes 286 */ 287 if (ro->ro_rt->rt_flags & RTF_HOST) { 288 if (!ipx_hosteq(ipxp->ipxp_lastdst, ipx->ipx_dna)) 289 goto re_route; 290 291 } 292 if ((ro->ro_rt->rt_flags & RTF_GATEWAY) == 0) { 293 register struct ipx_addr *dst = 294 &satoipx_addr(ro->ro_dst); 295 dst->x_host = ipx->ipx_dna.x_host; 296 } 297 /* 298 * Otherwise, we go through the same gateway 299 * and dst is already set up. 300 */ 301 } else { 302 re_route: 303 RTFREE(ro->ro_rt); 304 ro->ro_rt = NULL; 305 } 306 } 307 ipxp->ipxp_lastdst = ipx->ipx_dna; 308#endif /* ancient_history */ 309 return (ipx_outputfl(m, ro, so->so_options & SO_BROADCAST)); 310} 311 312int 313ipx_ctloutput(so, sopt) 314 struct socket *so; 315 struct sockopt *sopt; 316{ 317 register struct mbuf *m; 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_HEADERS_ON_OUTPUT: 339 mask = IPXP_RAWOUT; 340 get_flags: 341 soptval = ipxp->ipxp_flags & mask; 342 error = sooptcopyout(sopt, &soptval, sizeof soptval); 343 break; 344 345 case SO_DEFAULT_HEADERS: 346 ioptval.ipx_len = 0; 347 ioptval.ipx_sum = 0; 348 ioptval.ipx_tc = 0; 349 ioptval.ipx_pt = ipxp->ipxp_dpt; 350 ioptval.ipx_dna = ipxp->ipxp_faddr; 351 ioptval.ipx_sna = ipxp->ipxp_laddr; 352 error = sooptcopyout(sopt, &soptval, sizeof soptval); 353 break; 354 355 case SO_SEQNO: 356 error = sooptcopyout(sopt, &ipx_pexseq, 357 sizeof ipx_pexseq); 358 ipx_pexseq++; 359 break; 360 361 default: 362 error = EINVAL; 363 } 364 break; 365 366 case SOPT_SET: 367 switch (sopt->sopt_name) { 368 case SO_ALL_PACKETS: 369 mask = IPXP_ALL_PACKETS; 370 goto set_head; 371 372 case SO_HEADERS_ON_INPUT: 373 mask = IPXP_RAWIN; 374 goto set_head; 375 376 case SO_HEADERS_ON_OUTPUT: 377 mask = IPXP_RAWOUT; 378 set_head: 379 error = sooptcopyin(sopt, &optval, sizeof optval, 380 sizeof optval); 381 if (error) 382 break; 383 if (optval) 384 ipxp->ipxp_flags |= mask; 385 else 386 ipxp->ipxp_flags &= ~mask; 387 break; 388 389 case SO_DEFAULT_HEADERS: 390 error = sooptcopyin(sopt, &ioptval, sizeof ioptval, 391 sizeof ioptval); 392 if (error) 393 break; 394 ipxp->ipxp_dpt = ioptval.ipx_pt; 395 break; 396#ifdef IPXIP 397 case SO_IPXIP_ROUTE: 398 error = ipxip_route(so, sopt); 399 break; 400#endif /* IPXIP */ 401#ifdef IPTUNNEL 402#if 0 403 case SO_IPXTUNNEL_ROUTE: 404 error = ipxtun_route(so, sopt); 405 break; 406#endif 407#endif 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 sofree(so); 427 soisdisconnected(so); 428 return (0); 429} 430 431static int 432ipx_attach(so, proto, p) 433 struct socket *so; 434 int proto; 435 struct proc *p; 436{ 437 int error; 438 int s; 439 struct ipxpcb *ipxp = sotoipxpcb(so); 440 441 if (ipxp != NULL) 442 return (EINVAL); 443 s = splnet(); 444 error = ipx_pcballoc(so, &ipxpcb, p); 445 splx(s); 446 if (error == 0) 447 error = soreserve(so, ipxsendspace, ipxrecvspace); 448 return (error); 449} 450 451static int 452ipx_bind(so, nam, p) 453 struct socket *so; 454 struct sockaddr *nam; 455 struct proc *p; 456{ 457 struct ipxpcb *ipxp = sotoipxpcb(so); 458 459 return (ipx_pcbbind(ipxp, nam, p)); 460} 461 462static int 463ipx_connect(so, nam, p) 464 struct socket *so; 465 struct sockaddr *nam; 466 struct proc *p; 467{ 468 int error; 469 int s; 470 struct ipxpcb *ipxp = sotoipxpcb(so); 471 472 if (!ipx_nullhost(ipxp->ipxp_faddr)) 473 return (EISCONN); 474 s = splnet(); 475 error = ipx_pcbconnect(ipxp, nam, p); 476 splx(s); 477 if (error == 0) 478 soisconnected(so); 479 return (error); 480} 481 482static int 483ipx_detach(so) 484 struct socket *so; 485{ 486 int s; 487 struct ipxpcb *ipxp = sotoipxpcb(so); 488 489 if (ipxp == NULL) 490 return (ENOTCONN); 491 s = splnet(); 492 ipx_pcbdetach(ipxp); 493 splx(s); 494 return (0); 495} 496 497static int 498ipx_disconnect(so) 499 struct socket *so; 500{ 501 int s; 502 struct ipxpcb *ipxp = sotoipxpcb(so); 503 504 if (ipx_nullhost(ipxp->ipxp_faddr)) 505 return (ENOTCONN); 506 s = splnet(); 507 ipx_pcbdisconnect(ipxp); 508 splx(s); 509 soisdisconnected(so); 510 return (0); 511} 512 513int 514ipx_peeraddr(so, nam) 515 struct socket *so; 516 struct sockaddr **nam; 517{ 518 struct ipxpcb *ipxp = sotoipxpcb(so); 519 520 ipx_setpeeraddr(ipxp, nam); /* XXX what if alloc fails? */ 521 return (0); 522} 523 524static int 525ipx_send(so, flags, m, nam, control, p) 526 struct socket *so; 527 int flags; 528 struct mbuf *m; 529 struct sockaddr *nam; 530 struct mbuf *control; 531 struct proc *p; 532{ 533 int error; 534 struct ipxpcb *ipxp = sotoipxpcb(so); 535 struct ipx_addr laddr; 536 int s = 0; 537 538 if (nam != NULL) { 539 laddr = ipxp->ipxp_laddr; 540 if (!ipx_nullhost(ipxp->ipxp_faddr)) { 541 error = EISCONN; 542 goto send_release; 543 } 544 /* 545 * Must block input while temporarily connected. 546 */ 547 s = splnet(); 548 error = ipx_pcbconnect(ipxp, nam, p); 549 if (error) { 550 splx(s); 551 goto send_release; 552 } 553 } else { 554 if (ipx_nullhost(ipxp->ipxp_faddr)) { 555 error = ENOTCONN; 556 goto send_release; 557 } 558 } 559 error = ipx_output(ipxp, m); 560 m = NULL; 561 if (nam != NULL) { 562 ipx_pcbdisconnect(ipxp); 563 splx(s); 564 ipxp->ipxp_laddr.x_host = laddr.x_host; 565 ipxp->ipxp_laddr.x_port = laddr.x_port; 566 } 567 568send_release: 569 if (m != NULL) 570 m_freem(m); 571 return (error); 572} 573 574static int 575ipx_shutdown(so) 576 struct socket *so; 577{ 578 socantsendmore(so); 579 return (0); 580} 581 582int 583ipx_sockaddr(so, nam) 584 struct socket *so; 585 struct sockaddr **nam; 586{ 587 struct ipxpcb *ipxp = sotoipxpcb(so); 588 589 ipx_setsockaddr(ipxp, nam); /* XXX what if alloc fails? */ 590 return (0); 591} 592 593static int 594ripx_attach(so, proto, p) 595 struct socket *so; 596 int proto; 597 struct proc *p; 598{ 599 int error = 0; 600 int s; 601 struct ipxpcb *ipxp = sotoipxpcb(so); 602 603 if (p != NULL && (error = suser(p->p_ucred, &p->p_acflag)) != 0) 604 return (error); 605 s = splnet(); 606 error = ipx_pcballoc(so, &ipxrawpcb, p); 607 splx(s); 608 if (error) 609 return (error); 610 error = soreserve(so, ipxsendspace, ipxrecvspace); 611 if (error) 612 return (error); 613 ipxp = sotoipxpcb(so); 614 ipxp->ipxp_faddr.x_host = ipx_broadhost; 615 ipxp->ipxp_flags = IPXP_RAWIN | IPXP_RAWOUT; 616 return (error); 617} 618