The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/netiso/cltp_usrreq.c

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    1 /*      $NetBSD: cltp_usrreq.c,v 1.40 2009/04/18 14:58:06 tsutsui Exp $ */
    2 
    3 /*
    4  * Copyright (c) 1989, 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. Neither the name of the University nor the names of its contributors
   16  *    may be used to endorse or promote products derived from this software
   17  *    without specific prior written permission.
   18  *
   19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   29  * SUCH DAMAGE.
   30  *
   31  *      @(#)cltp_usrreq.c       8.1 (Berkeley) 6/10/93
   32  */
   33 
   34 #include <sys/cdefs.h>
   35 __KERNEL_RCSID(0, "$NetBSD: cltp_usrreq.c,v 1.40 2009/04/18 14:58:06 tsutsui Exp $");
   36 
   37 #ifndef CLTPOVAL_SRC            /* XXX -- till files gets changed */
   38 #include <sys/param.h>
   39 #include <sys/malloc.h>
   40 #include <sys/mbuf.h>
   41 #include <sys/protosw.h>
   42 #include <sys/socket.h>
   43 #include <sys/socketvar.h>
   44 #include <sys/errno.h>
   45 #include <sys/stat.h>
   46 #include <sys/systm.h>
   47 #include <sys/proc.h>
   48 
   49 #include <net/if.h>
   50 #include <net/route.h>
   51 
   52 #include <netiso/argo_debug.h>
   53 #include <netiso/iso.h>
   54 #include <netiso/iso_pcb.h>
   55 #include <netiso/iso_var.h>
   56 #include <netiso/clnp.h>
   57 #include <netiso/cltp_var.h>
   58 #include <netiso/tp_param.h>
   59 #include <netiso/tp_var.h>
   60 
   61 #include <machine/stdarg.h>
   62 #endif
   63 
   64 
   65 /*
   66  * CLTP protocol implementation.
   67  * Per ISO 8602, December, 1987.
   68  */
   69 void
   70 cltp_init(void)
   71 {
   72 
   73         cltb.isop_next = cltb.isop_prev = &cltb;
   74 }
   75 
   76 int cltp_cksum = 1;
   77 struct isopcb   cltb;
   78 struct cltpstat cltpstat;
   79 
   80 
   81 /* ARGUSED */
   82 void
   83 cltp_input(struct mbuf *m0, ...)
   84 {
   85         struct sockaddr *srcsa, *dstsa;
   86         u_int           cons_channel;
   87         struct isopcb *isop;
   88         struct mbuf *m = m0;
   89         struct mbuf *m_src = 0;
   90         u_char *up = mtod(m, u_char *);
   91         struct sockaddr_iso *src;
   92         int             len, hdrlen = *up + 1, dlen = 0;
   93         u_char         *uplim = up + hdrlen;
   94         void *        dtsap = NULL;
   95         va_list ap;
   96 
   97         va_start(ap, m0);
   98         srcsa = va_arg(ap, struct sockaddr *);
   99         dstsa = va_arg(ap, struct sockaddr *);
  100         cons_channel = va_arg(ap, int);
  101         va_end(ap);
  102         src = satosiso(srcsa);
  103 
  104         for (len = 0; m; m = m->m_next)
  105                 len += m->m_len;
  106         up += 2;                /* skip header */
  107         while (up < uplim)
  108                 switch (*up) {  /* process options */
  109                 case CLTPOVAL_SRC:
  110                         src->siso_tlen = up[1];
  111                         src->siso_len = up[1] +
  112                             ((const char *)TSEL(src) - (const char *)src);
  113                         if (src->siso_len < sizeof(*src))
  114                                 src->siso_len = sizeof(*src);
  115                         else if (src->siso_len > sizeof(*src)) {
  116                                 MGET(m_src, M_DONTWAIT, MT_SONAME);
  117                                 if (m_src == 0)
  118                                         goto bad;
  119                                 m_src->m_len = src->siso_len;
  120                                 src = mtod(m_src, struct sockaddr_iso *);
  121                                 memcpy((void *) src, (void *) srcsa, srcsa->sa_len);
  122                         }
  123                         memcpy(WRITABLE_TSEL(src), (char *)up + 2, up[1]);
  124                         up += 2 + src->siso_tlen;
  125                         continue;
  126 
  127                 case CLTPOVAL_DST:
  128                         dtsap = 2 + (char *)up;
  129                         dlen = up[1];
  130                         up += 2 + dlen;
  131                         continue;
  132 
  133                 case CLTPOVAL_CSM:
  134                         if (iso_check_csum(m0, len)) {
  135                                 cltpstat.cltps_badsum++;
  136                                 goto bad;
  137                         }
  138                         up += 4;
  139                         continue;
  140 
  141                 default:
  142                         printf("clts: unknown option (%x)\n", up[0]);
  143                         cltpstat.cltps_hdrops++;
  144                         goto bad;
  145                 }
  146         if (dlen == 0 || src->siso_tlen == 0)
  147                 goto bad;
  148         for (isop = cltb.isop_next;; isop = isop->isop_next) {
  149                 if (isop == &cltb) {
  150                         cltpstat.cltps_noport++;
  151                         goto bad;
  152                 }
  153                 if (isop->isop_laddr &&
  154                     memcmp(TSEL(isop->isop_laddr), dtsap, dlen) == 0)
  155                         break;
  156         }
  157         m = m0;
  158         m->m_len -= hdrlen;
  159         m->m_data += hdrlen;
  160         if (sbappendaddr(&isop->isop_socket->so_rcv, sisotosa(src), m,
  161                          (struct mbuf *) 0) == 0)
  162                 goto bad;
  163         cltpstat.cltps_ipackets++;
  164         sorwakeup(isop->isop_socket);
  165         m0 = 0;
  166 bad:
  167         if (src != satosiso(srcsa))
  168                 m_freem(m_src);
  169         if (m0)
  170                 m_freem(m0);
  171 }
  172 
  173 /*
  174  * Notify a cltp user of an asynchronous error;
  175  * just wake up so that he can collect error status.
  176  */
  177 void
  178 cltp_notify(struct isopcb *isop)
  179 {
  180 
  181         sorwakeup(isop->isop_socket);
  182         sowwakeup(isop->isop_socket);
  183 }
  184 
  185 void
  186 cltp_ctlinput(
  187     int cmd,
  188     const struct sockaddr *sa,
  189     void *dummy)
  190 {
  191         const struct sockaddr_iso *siso;
  192 
  193         if ((unsigned)cmd >= PRC_NCMDS)
  194                 return;
  195         if (sa->sa_family != AF_ISO && sa->sa_family != AF_CCITT)
  196                 return;
  197         siso = satocsiso(sa);
  198         if (siso == 0 || siso->siso_nlen == 0)
  199                 return;
  200 
  201         switch (cmd) {
  202         case PRC_ROUTEDEAD:
  203         case PRC_REDIRECT_NET:
  204         case PRC_REDIRECT_HOST:
  205         case PRC_REDIRECT_TOSNET:
  206         case PRC_REDIRECT_TOSHOST:
  207                 iso_pcbnotify(&cltb, siso,
  208                               (int) isoctlerrmap[cmd], iso_rtchange);
  209                 break;
  210 
  211         default:
  212                 if (isoctlerrmap[cmd] == 0)
  213                         return; /* XXX */
  214                 iso_pcbnotify(&cltb, siso, (int) isoctlerrmap[cmd],
  215                               cltp_notify);
  216         }
  217 }
  218 
  219 int
  220 cltp_output(struct mbuf *m, ...)
  221 {
  222         struct isopcb *isop;
  223         int    len;
  224         struct sockaddr_iso *siso;
  225         int             hdrlen, error = 0, docsum;
  226         u_char *up;
  227         va_list ap;
  228 
  229         va_start(ap, m);
  230         isop = va_arg(ap, struct isopcb *);
  231         va_end(ap);
  232 
  233         if (isop->isop_laddr == 0 || isop->isop_faddr == 0) {
  234                 error = ENOTCONN;
  235                 goto bad;
  236         }
  237         /*
  238          * Calculate data length and get a mbuf for CLTP header.
  239          */
  240         hdrlen = 2 + 2 + isop->isop_laddr->siso_tlen
  241                 + 2 + isop->isop_faddr->siso_tlen;
  242         docsum = /* isop->isop_flags & CLNP_NO_CKSUM */ cltp_cksum;
  243         if (docsum)
  244                 hdrlen += 4;
  245         M_PREPEND(m, hdrlen, M_WAIT);
  246         len = m->m_pkthdr.len;
  247         /*
  248          * Fill in mbuf with extended CLTP header
  249          */
  250         up = mtod(m, u_char *);
  251         up[0] = hdrlen - 1;
  252         up[1] = UD_TPDU_type;
  253         up[2] = CLTPOVAL_SRC;
  254         up[3] = (siso = isop->isop_laddr)->siso_tlen;
  255         up += 4;
  256         memcpy((void *) up, TSEL(siso), siso->siso_tlen);
  257         up += siso->siso_tlen;
  258         up[0] = CLTPOVAL_DST;
  259         up[1] = (siso = isop->isop_faddr)->siso_tlen;
  260         up += 2;
  261         memcpy((void *) up, TSEL(siso), siso->siso_tlen);
  262         /*
  263          * Stuff checksum and output datagram.
  264          */
  265         if (docsum) {
  266                 up += siso->siso_tlen;
  267                 up[0] = CLTPOVAL_CSM;
  268                 up[1] = 2;
  269                 iso_gen_csum(m, 2 + up - mtod(m, u_char *), len);
  270         }
  271         cltpstat.cltps_opackets++;
  272         return (tpclnp_output(m, len, isop, !docsum));
  273 bad:
  274         m_freem(m);
  275         return (error);
  276 }
  277 
  278 u_long          cltp_sendspace = 9216;  /* really max datagram size */
  279 u_long          cltp_recvspace = 40 * (1024 + sizeof(struct sockaddr_iso));
  280 /* 40 1K datagrams */
  281 
  282 
  283 /* ARGSUSED */
  284 int
  285 cltp_usrreq(struct socket *so, int req, struct mbuf *m, struct mbuf *nam, struct mbuf *control, struct lwp *l)
  286 {
  287         struct isopcb *isop;
  288         int s;
  289         int error = 0;
  290 
  291         if (req == PRU_CONTROL)
  292                 return (iso_control(so, (long)m, (void *)nam,
  293                     (struct ifnet *)control, l));
  294 
  295         if (req == PRU_PURGEIF) {
  296                 mutex_enter(softnet_lock);
  297                 iso_purgeif((struct ifnet *)control);
  298                 mutex_exit(softnet_lock);
  299                 return (0);
  300         }
  301 
  302         s = splsoftnet();
  303         isop = sotoisopcb(so);
  304 #ifdef DIAGNOSTIC
  305         if (req != PRU_SEND && req != PRU_SENDOOB && control)
  306                 panic("cltp_usrreq: unexpected control mbuf");
  307 #endif
  308         if (isop == 0 && req != PRU_ATTACH) {
  309                 error = EINVAL;
  310                 goto release;
  311         }
  312 
  313         switch (req) {
  314 
  315         case PRU_ATTACH:
  316                 sosetlock(so);
  317                 if (isop != 0) {
  318                         error = EISCONN;
  319                         break;
  320                 }
  321                 if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) {
  322                         error = soreserve(so, cltp_sendspace, cltp_recvspace);
  323                         if (error)
  324                                 break;
  325                 }
  326                 error = iso_pcballoc(so, &cltb);
  327                 if (error)
  328                         break;
  329                 break;
  330 
  331         case PRU_DETACH:
  332                 iso_pcbdetach(isop);
  333                 break;
  334 
  335         case PRU_BIND:
  336                 error = iso_pcbbind(isop, nam, l);
  337                 break;
  338 
  339         case PRU_LISTEN:
  340                 error = EOPNOTSUPP;
  341                 break;
  342 
  343         case PRU_CONNECT:
  344                 error = iso_pcbconnect(isop, nam, l);
  345                 if (error)
  346                         break;
  347                 soisconnected(so);
  348                 break;
  349 
  350         case PRU_CONNECT2:
  351                 error = EOPNOTSUPP;
  352                 break;
  353 
  354         case PRU_DISCONNECT:
  355                 soisdisconnected(so);
  356                 iso_pcbdisconnect(isop);
  357                 break;
  358 
  359         case PRU_SHUTDOWN:
  360                 socantsendmore(so);
  361                 break;
  362 
  363         case PRU_RCVD:
  364                 error = EOPNOTSUPP;
  365                 break;
  366 
  367         case PRU_SEND:
  368                 if (control && control->m_len) {
  369                         m_freem(control);
  370                         m_freem(m);
  371                         error = EINVAL;
  372                         break;
  373                 }
  374                 if (nam) {
  375                         if ((so->so_state & SS_ISCONNECTED) != 0) {
  376                                 error = EISCONN;
  377                                 goto die;
  378                         }
  379                         error = iso_pcbconnect(isop, nam, l);
  380                         if (error) {
  381                         die:
  382                                 m_freem(m);
  383                                 break;
  384                         }
  385                 } else {
  386                         if ((so->so_state & SS_ISCONNECTED) == 0) {
  387                                 error = ENOTCONN;
  388                                 goto die;
  389                         }
  390                 }
  391                 error = cltp_output(m, isop);
  392                 if (nam)
  393                         iso_pcbdisconnect(isop);
  394                 break;
  395 
  396         case PRU_SENSE:
  397                 /*
  398                  * stat: don't bother with a blocksize.
  399                  */
  400                 splx(s);
  401                 return (0);
  402 
  403         case PRU_RCVOOB:
  404                 error = EOPNOTSUPP;
  405                 break;
  406 
  407         case PRU_SENDOOB:
  408                 m_freem(control);
  409                 m_freem(m);
  410                 error = EOPNOTSUPP;
  411                 break;
  412 
  413         case PRU_SOCKADDR:
  414                 iso_getnetaddr(isop, nam, TP_LOCAL);
  415                 break;
  416 
  417         case PRU_PEERADDR:
  418                 iso_getnetaddr(isop, nam, TP_FOREIGN);
  419                 break;
  420 
  421         default:
  422                 panic("cltp_usrreq");
  423         }
  424 
  425 release:
  426         splx(s);
  427         return (error);
  428 }

Cache object: b682a3c52f07b994ed2d3f1909478197


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