sys/netproto/ipx/ipx_usrreq.c

   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  * $FreeBSD: src/sys/netipx/ipx_usrreq.c,v 1.26.2.1 2001/02/22 09:44:18 bp Exp $
  37  * $DragonFly: src/sys/netproto/ipx/ipx_usrreq.c,v 1.12 2007/04/22 01:13:15 dillon Exp $
  38  */
  39
  40 #include "opt_ipx.h"
  41
  42 #include <sys/param.h>
  43 #include <sys/systm.h>
  44 #include <sys/kernel.h>
  45 #include <sys/mbuf.h>
  46 #include <sys/proc.h>
  47 #include <sys/protosw.h>
  48 #include <sys/socket.h>
  49 #include <sys/socketvar.h>
  50 #include <sys/sysctl.h>
  51 #include <sys/thread2.h>
  52
  53 #include <net/if.h>
  54 #include <net/route.h>
  55
  56 #include <netinet/in.h>
  57
  58 #include "ipx.h"
  59 #include "ipx_pcb.h"
  60 #include "ipx_if.h"
  61 #include "ipx_var.h"
  62 #include "ipx_ip.h"
  63
  64 /*
  65  * IPX protocol implementation.
  66  */
  67
  68 static int ipxsendspace = IPXSNDQ;
  69 SYSCTL_INT(_net_ipx_ipx, OID_AUTO, ipxsendspace, CTLFLAG_RW,
  70             &ipxsendspace, 0, "");
  71 static int ipxrecvspace = IPXRCVQ;
  72 SYSCTL_INT(_net_ipx_ipx, OID_AUTO, ipxrecvspace, CTLFLAG_RW,
  73             &ipxrecvspace, 0, "");
  74
  75 static  int ipx_usr_abort(struct socket *so);
  76 static  int ipx_attach(struct socket *so, int proto,
  77                        struct pru_attach_info *ai);
  78 static  int ipx_bind(struct socket *so, struct sockaddr *nam,
  79                      struct thread *td);
  80 static  int ipx_connect(struct socket *so, struct sockaddr *nam,
  81                         struct thread *td);
  82 static  int ipx_detach(struct socket *so);
  83 static  int ipx_disconnect(struct socket *so);
  84 static  int ipx_send(struct socket *so, int flags, struct mbuf *m,
  85                      struct sockaddr *addr, struct mbuf *control,
  86                      struct thread *td);
  87 static  int ipx_shutdown(struct socket *so);
  88 static  int ripx_attach(struct socket *so, int proto,
  89                         struct pru_attach_info *ai);
  90 static  int ipx_output(struct ipxpcb *ipxp, struct mbuf *m0);
  91
  92 struct  pr_usrreqs ipx_usrreqs = {
  93         .pru_abort = ipx_usr_abort,
  94         .pru_accept = pru_accept_notsupp,
  95         .pru_attach = ipx_attach,
  96         .pru_bind = ipx_bind,
  97         .pru_connect = ipx_connect,
  98         .pru_connect2 = pru_connect2_notsupp,
  99         .pru_control = ipx_control,
 100         .pru_detach = ipx_detach,
 101         .pru_disconnect = ipx_disconnect,
 102         .pru_listen = pru_listen_notsupp,
 103         .pru_peeraddr = ipx_peeraddr,
 104         .pru_rcvd = pru_rcvd_notsupp,
 105         .pru_rcvoob = pru_rcvoob_notsupp,
 106         .pru_send = ipx_send,
 107         .pru_sense = pru_sense_null,
 108         .pru_shutdown = ipx_shutdown,
 109         .pru_sockaddr = ipx_sockaddr,
 110         .pru_sosend = sosend,
 111         .pru_soreceive = soreceive,
 112         .pru_sopoll = sopoll
 113 };
 114
 115 struct  pr_usrreqs ripx_usrreqs = {
 116         .pru_abort = ipx_usr_abort,
 117         .pru_accept = pru_accept_notsupp,
 118         .pru_attach = ripx_attach,
 119         .pru_bind = ipx_bind,
 120         .pru_connect = ipx_connect,
 121         .pru_connect2 = pru_connect2_notsupp,
 122         .pru_control = ipx_control,
 123         .pru_detach = ipx_detach,
 124         .pru_disconnect = ipx_disconnect,
 125         .pru_listen = pru_listen_notsupp,
 126         .pru_peeraddr = ipx_peeraddr,
 127         .pru_rcvd = pru_rcvd_notsupp,
 128         .pru_rcvoob = pru_rcvoob_notsupp,
 129         .pru_send = ipx_send,
 130         .pru_sense = pru_sense_null,
 131         .pru_shutdown = ipx_shutdown,
 132         .pru_sockaddr = ipx_sockaddr,
 133         .pru_sosend = sosend,
 134         .pru_soreceive = soreceive,
 135         .pru_sopoll = sopoll
 136 };
 137
 138 /*
 139  *  This may also be called for raw listeners.
 140  */
 141 void
 142 ipx_input(struct mbuf *m, struct ipxpcb *ipxp)
 143 {
 144         struct ipx *ipx = mtod(m, struct ipx *);
 145         struct ifnet *ifp = m->m_pkthdr.rcvif;
 146         struct sockaddr_ipx ipx_ipx;
 147
 148         if (ipxp == NULL)
 149                 panic("No ipxpcb");
 150         /*
 151          * Construct sockaddr format source address.
 152          * Stuff source address and datagram in user buffer.
 153          */
 154         ipx_ipx.sipx_len = sizeof(ipx_ipx);
 155         ipx_ipx.sipx_family = AF_IPX;
 156         ipx_ipx.sipx_addr = ipx->ipx_sna;
 157         ipx_ipx.sipx_zero[0] = '\0';
 158         ipx_ipx.sipx_zero[1] = '\0';
 159         if (ipx_neteqnn(ipx->ipx_sna.x_net, ipx_zeronet) && ifp != NULL) {
 160                 struct ifaddr *ifa;
 161
 162                 for (ifa = TAILQ_FIRST(&ifp->if_addrhead); ifa != NULL;
 163                      ifa = TAILQ_NEXT(ifa, ifa_link)) {
 164                         if (ifa->ifa_addr->sa_family == AF_IPX) {
 165                                 ipx_ipx.sipx_addr.x_net =
 166                                         IA_SIPX(ifa)->sipx_addr.x_net;
 167                                 break;
 168                         }
 169                 }
 170         }
 171         ipxp->ipxp_rpt = ipx->ipx_pt;
 172         if (!(ipxp->ipxp_flags & IPXP_RAWIN) ) {
 173                 m->m_len -= sizeof(struct ipx);
 174                 m->m_pkthdr.len -= sizeof(struct ipx);
 175                 m->m_data += sizeof(struct ipx);
 176         }
 177         if (ssb_appendaddr(&ipxp->ipxp_socket->so_rcv, (struct sockaddr *)&ipx_ipx,
 178             m, (struct mbuf *)NULL) == 0)
 179                 goto bad;
 180         sorwakeup(ipxp->ipxp_socket);
 181         return;
 182 bad:
 183         m_freem(m);
 184 }
 185
 186 void
 187 ipx_abort(struct ipxpcb *ipxp)
 188 {
 189         struct socket *so = ipxp->ipxp_socket;
 190
 191         ipx_pcbdisconnect(ipxp);
 192         soisdisconnected(so);
 193 }
 194
 195 /*
 196  * Drop connection, reporting
 197  * the specified error.
 198  */
 199 void
 200 ipx_drop(struct ipxpcb *ipxp, int errno)
 201 {
 202         struct socket *so = ipxp->ipxp_socket;
 203
 204         /*
 205          * someday, in the IPX world
 206          * we will generate error protocol packets
 207          * announcing that the socket has gone away.
 208          *
 209          * XXX Probably never. IPX does not have error packets.
 210          */
 211         /*if (TCPS_HAVERCVDSYN(tp->t_state)) {
 212                 tp->t_state = TCPS_CLOSED;
 213                 tcp_output(tp);
 214         }*/
 215         so->so_error = errno;
 216         ipx_pcbdisconnect(ipxp);
 217         soisdisconnected(so);
 218 }
 219
 220 static int
 221 ipx_output(struct ipxpcb *ipxp, struct mbuf *m0)
 222 {
 223         struct ipx *ipx;
 224         struct socket *so;
 225         int len = 0;
 226         struct route *ro;
 227         struct mbuf *m;
 228         struct mbuf *mprev = NULL;
 229
 230         /*
 231          * Calculate data length.
 232          */
 233         for (m = m0; m != NULL; m = m->m_next) {
 234                 mprev = m;
 235                 len += m->m_len;
 236         }
 237         /*
 238          * Make sure packet is actually of even length.
 239          */
 240
 241         if (len & 1) {
 242                 m = mprev;
 243                 if ((m->m_flags & M_EXT) == 0 &&
 244                         (m->m_len + m->m_data < &m->m_dat[MLEN])) {
 245                         mtod(m, char*)[m->m_len++] = 0;
 246                 } else {
 247                         struct mbuf *m1 = m_get(MB_DONTWAIT, MT_DATA);
 248
 249                         if (m1 == NULL) {
 250                                 m_freem(m0);
 251                                 return (ENOBUFS);
 252                         }
 253                         m1->m_len = 1;
 254                         * mtod(m1, char *) = 0;
 255                         m->m_next = m1;
 256                 }
 257                 m0->m_pkthdr.len++;
 258         }
 259
 260         /*
 261          * Fill in mbuf with extended IPX header
 262          * and addresses and length put into network format.
 263          */
 264         m = m0;
 265         if (ipxp->ipxp_flags & IPXP_RAWOUT) {
 266                 ipx = mtod(m, struct ipx *);
 267         } else {
 268                 M_PREPEND(m, sizeof(struct ipx), MB_DONTWAIT);
 269                 if (m == NULL)
 270                         return (ENOBUFS);
 271                 ipx = mtod(m, struct ipx *);
 272                 ipx->ipx_tc = 0;
 273                 ipx->ipx_pt = ipxp->ipxp_dpt;
 274                 ipx->ipx_sna = ipxp->ipxp_laddr;
 275                 ipx->ipx_dna = ipxp->ipxp_faddr;
 276                 len += sizeof(struct ipx);
 277         }
 278
 279         ipx->ipx_len = htons((u_short)len);
 280
 281         if (ipxp->ipxp_flags & IPXP_CHECKSUM) {
 282                 ipx->ipx_sum = ipx_cksum(m, len);
 283         } else
 284                 ipx->ipx_sum = 0xffff;
 285
 286         /*
 287          * Output datagram.
 288          */
 289         so = ipxp->ipxp_socket;
 290         if (so->so_options & SO_DONTROUTE)
 291                 return (ipx_outputfl(m, (struct route *)NULL,
 292                     (so->so_options & SO_BROADCAST) | IPX_ROUTETOIF));
 293         /*
 294          * Use cached route for previous datagram if
 295          * possible.  If the previous net was the same
 296          * and the interface was a broadcast medium, or
 297          * if the previous destination was identical,
 298          * then we are ok.
 299          *
 300          * NB: We don't handle broadcasts because that
 301          *     would require 3 subroutine calls.
 302          */
 303         ro = &ipxp->ipxp_route;
 304 #ifdef ancient_history
 305         /*
 306          * I think that this will all be handled in ipx_pcbconnect!
 307          */
 308         if (ro->ro_rt != NULL) {
 309                 if(ipx_neteq(ipxp->ipxp_lastdst, ipx->ipx_dna)) {
 310                         /*
 311                          * This assumes we have no GH type routes
 312                          */
 313                         if (ro->ro_rt->rt_flags & RTF_HOST) {
 314                                 if (!ipx_hosteq(ipxp->ipxp_lastdst, ipx->ipx_dna))
 315                                         goto re_route;
 316
 317                         }
 318                         if ((ro->ro_rt->rt_flags & RTF_GATEWAY) == 0) {
 319                                 struct ipx_addr *dst =
 320                                                 &satoipx_addr(ro->ro_dst);
 321                                 dst->x_host = ipx->ipx_dna.x_host;
 322                         }
 323                         /*
 324                          * Otherwise, we go through the same gateway
 325                          * and dst is already set up.
 326                          */
 327                 } else {
 328                 re_route:
 329                         RTFREE(ro->ro_rt);
 330                         ro->ro_rt = NULL;
 331                 }
 332         }
 333         ipxp->ipxp_lastdst = ipx->ipx_dna;
 334 #endif /* ancient_history */
 335         return (ipx_outputfl(m, ro, so->so_options & SO_BROADCAST));
 336 }
 337
 338 int
 339 ipx_ctloutput(struct socket *so, struct sockopt *sopt)
 340 {
 341         struct ipxpcb *ipxp = sotoipxpcb(so);
 342         int mask, error, optval;
 343         short soptval;
 344         struct ipx ioptval;
 345
 346         error = 0;
 347         if (ipxp == NULL)
 348                 return (EINVAL);
 349
 350         switch (sopt->sopt_dir) {
 351         case SOPT_GET:
 352                 switch (sopt->sopt_name) {
 353                 case SO_ALL_PACKETS:
 354                         mask = IPXP_ALL_PACKETS;
 355                         goto get_flags;
 356
 357                 case SO_HEADERS_ON_INPUT:
 358                         mask = IPXP_RAWIN;
 359                         goto get_flags;
 360
 361                 case SO_IPX_CHECKSUM:
 362                         mask = IPXP_CHECKSUM;
 363                         goto get_flags;
 364
 365                 case SO_HEADERS_ON_OUTPUT:
 366                         mask = IPXP_RAWOUT;
 367                 get_flags:
 368                         soptval = ipxp->ipxp_flags & mask;
 369                         error = sooptcopyout(sopt, &soptval, sizeof soptval);
 370                         break;
 371
 372                 case SO_DEFAULT_HEADERS:
 373                         ioptval.ipx_len = 0;
 374                         ioptval.ipx_sum = 0;
 375                         ioptval.ipx_tc = 0;
 376                         ioptval.ipx_pt = ipxp->ipxp_dpt;
 377                         ioptval.ipx_dna = ipxp->ipxp_faddr;
 378                         ioptval.ipx_sna = ipxp->ipxp_laddr;
 379                         error = sooptcopyout(sopt, &soptval, sizeof soptval);
 380                         break;
 381
 382                 case SO_SEQNO:
 383                         error = sooptcopyout(sopt, &ipx_pexseq,
 384                                              sizeof ipx_pexseq);
 385                         ipx_pexseq++;
 386                         break;
 387
 388                 default:
 389                         error = EINVAL;
 390                 }
 391                 break;
 392
 393         case SOPT_SET:
 394                 switch (sopt->sopt_name) {
 395                 case SO_ALL_PACKETS:
 396                         mask = IPXP_ALL_PACKETS;
 397                         goto set_head;
 398
 399                 case SO_HEADERS_ON_INPUT:
 400                         mask = IPXP_RAWIN;
 401                         goto set_head;
 402
 403                 case SO_IPX_CHECKSUM:
 404                         mask = IPXP_CHECKSUM;
 405
 406                 case SO_HEADERS_ON_OUTPUT:
 407                         mask = IPXP_RAWOUT;
 408                 set_head:
 409                         error = sooptcopyin(sopt, &optval, sizeof optval,
 410                                             sizeof optval);
 411                         if (error)
 412                                 break;
 413                         if (optval)
 414                                 ipxp->ipxp_flags |= mask;
 415                         else
 416                                 ipxp->ipxp_flags &= ~mask;
 417                         break;
 418
 419                 case SO_DEFAULT_HEADERS:
 420                         error = sooptcopyin(sopt, &ioptval, sizeof ioptval,
 421                                             sizeof ioptval);
 422                         if (error)
 423                                 break;
 424                         ipxp->ipxp_dpt = ioptval.ipx_pt;
 425                         break;
 426 #ifdef IPXIP
 427                 case SO_IPXIP_ROUTE:
 428                         error = ipxip_route(so, sopt);
 429                         break;
 430 #endif /* IPXIP */
 431 #ifdef IPTUNNEL
 432 #if 0
 433                 case SO_IPXTUNNEL_ROUTE:
 434                         error = ipxtun_route(so, sopt);
 435                         break;
 436 #endif
 437 #endif
 438                 default:
 439                         error = EINVAL;
 440                 }
 441                 break;
 442         }
 443         return (error);
 444 }
 445
 446 static int
 447 ipx_usr_abort(struct socket *so)
 448 {
 449         struct ipxpcb *ipxp = sotoipxpcb(so);
 450
 451         crit_enter();
 452         ipx_pcbdetach(ipxp);
 453         crit_exit();
 454         sofree(so);
 455         soisdisconnected(so);
 456         return (0);
 457 }
 458
 459 static int
 460 ipx_attach(struct socket *so, int proto, struct pru_attach_info *ai)
 461 {
 462         int error;
 463         struct ipxpcb *ipxp = sotoipxpcb(so);
 464
 465         if (ipxp != NULL)
 466                 return (EINVAL);
 467         crit_enter();
 468         error = ipx_pcballoc(so, &ipxpcb);
 469         crit_exit();
 470         if (error == 0)
 471                 error = soreserve(so, ipxsendspace, ipxrecvspace,
 472                                   ai->sb_rlimit);
 473         return (error);
 474 }
 475
 476 static int
 477 ipx_bind(struct socket *so, struct sockaddr *nam, struct thread *td)
 478 {
 479         struct ipxpcb *ipxp = sotoipxpcb(so);
 480
 481         return (ipx_pcbbind(ipxp, nam, td));
 482 }
 483
 484 static int
 485 ipx_connect(struct socket *so, struct sockaddr *nam, struct thread *td)
 486 {
 487         int error;
 488         struct ipxpcb *ipxp = sotoipxpcb(so);
 489
 490         if (!ipx_nullhost(ipxp->ipxp_faddr))
 491                 return (EISCONN);
 492         crit_enter();
 493         error = ipx_pcbconnect(ipxp, nam, td);
 494         crit_exit();
 495         if (error == 0)
 496                 soisconnected(so);
 497         return (error);
 498 }
 499
 500 static int
 501 ipx_detach(struct socket *so)
 502 {
 503         struct ipxpcb *ipxp = sotoipxpcb(so);
 504
 505         if (ipxp == NULL)
 506                 return (ENOTCONN);
 507         crit_enter();
 508         ipx_pcbdetach(ipxp);
 509         crit_exit();
 510         return (0);
 511 }
 512
 513 static int
 514 ipx_disconnect(struct socket *so)
 515 {
 516         struct ipxpcb *ipxp = sotoipxpcb(so);
 517
 518         if (ipx_nullhost(ipxp->ipxp_faddr))
 519                 return (ENOTCONN);
 520         crit_enter();
 521         ipx_pcbdisconnect(ipxp);
 522         crit_exit();
 523         soisdisconnected(so);
 524         return (0);
 525 }
 526
 527 int
 528 ipx_peeraddr(struct socket *so, struct sockaddr **nam)
 529 {
 530         struct ipxpcb *ipxp = sotoipxpcb(so);
 531
 532         ipx_setpeeraddr(ipxp, nam);
 533         return (0);
 534 }
 535
 536 static int
 537 ipx_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam,
 538         struct mbuf *control, struct thread *td)
 539 {
 540         int error;
 541         struct ipxpcb *ipxp = sotoipxpcb(so);
 542         struct ipx_addr laddr;
 543
 544         crit_enter();
 545         if (nam != NULL) {
 546                 laddr = ipxp->ipxp_laddr;
 547                 if (!ipx_nullhost(ipxp->ipxp_faddr)) {
 548                         error = EISCONN;
 549                         goto send_release;
 550                 }
 551                 /*
 552                  * Must block input while temporarily connected.
 553                  */
 554                 error = ipx_pcbconnect(ipxp, nam, td);
 555                 if (error) {
 556                         goto send_release;
 557                 }
 558         } else {
 559                 if (ipx_nullhost(ipxp->ipxp_faddr)) {
 560                         error = ENOTCONN;
 561                         goto send_release;
 562                 }
 563         }
 564         error = ipx_output(ipxp, m);
 565         m = NULL;
 566         if (nam != NULL) {
 567                 ipx_pcbdisconnect(ipxp);
 568                 ipxp->ipxp_laddr = laddr;
 569         }
 570 send_release:
 571         crit_exit();
 572         if (m != NULL)
 573                 m_freem(m);
 574         return (error);
 575 }
 576
 577 static int
 578 ipx_shutdown(struct socket *so)
 579 {
 580         socantsendmore(so);
 581         return (0);
 582 }
 583
 584 int
 585 ipx_sockaddr(struct socket *so, 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
 593 static int
 594 ripx_attach(struct socket *so, int proto, struct pru_attach_info *ai)
 595 {
 596         int error = 0;
 597         struct ipxpcb *ipxp = sotoipxpcb(so);
 598
 599         if ((error = suser_cred(ai->p_ucred, NULL_CRED_OKAY)) != 0)
 600                 return (error);
 601         crit_enter();
 602         error = ipx_pcballoc(so, &ipxrawpcb);
 603         crit_exit();
 604         if (error)
 605                 return (error);
 606         error = soreserve(so, ipxsendspace, ipxrecvspace, ai->sb_rlimit);
 607         if (error)
 608                 return (error);
 609         ipxp = sotoipxpcb(so);
 610         ipxp->ipxp_faddr.x_host = ipx_broadhost;
 611         ipxp->ipxp_flags = IPXP_RAWIN | IPXP_RAWOUT;
 612         return (error);
 613 }