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 1.23 2003/09/30 00:01:18 christos 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 1.23 2003/09/30 00:01:18 christos 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 
   48 #include <net/if.h>
   49 #include <net/route.h>
   50 
   51 #include <netiso/argo_debug.h>
   52 #include <netiso/iso.h>
   53 #include <netiso/iso_pcb.h>
   54 #include <netiso/iso_var.h>
   55 #include <netiso/clnp.h>
   56 #include <netiso/cltp_var.h>
   57 #include <netiso/tp_param.h>
   58 #include <netiso/tp_var.h>
   59 
   60 #include <machine/stdarg.h>
   61 #endif
   62 
   63 
   64 /*
   65  * CLTP protocol implementation.
   66  * Per ISO 8602, December, 1987.
   67  */
   68 void
   69 cltp_init()
   70 {
   71 
   72         cltb.isop_next = cltb.isop_prev = &cltb;
   73 }
   74 
   75 int cltp_cksum = 1;
   76 struct isopcb   cltb;
   77 struct cltpstat cltpstat;
   78 
   79 
   80 /* ARGUSED */
   81 void
   82 #if __STDC__
   83 cltp_input(struct mbuf *m0, ...)
   84 #else
   85 cltp_input(m0, va_alist)
   86         struct mbuf    *m0;
   87         va_dcl
   88 #endif
   89 {
   90         struct sockaddr *srcsa, *dstsa;
   91         u_int           cons_channel;
   92         struct isopcb *isop;
   93         struct mbuf *m = m0;
   94         struct mbuf *m_src = 0;
   95         u_char *up = mtod(m, u_char *);
   96         struct sockaddr_iso *src;
   97         int             len, hdrlen = *up + 1, dlen = 0;
   98         u_char         *uplim = up + hdrlen;
   99         caddr_t         dtsap = NULL;
  100         va_list ap;
  101 
  102         va_start(ap, m0);
  103         srcsa = va_arg(ap, struct sockaddr *);
  104         dstsa = va_arg(ap, struct sockaddr *);
  105         cons_channel = va_arg(ap, int);
  106         va_end(ap);
  107         src = satosiso(srcsa);
  108 
  109         for (len = 0; m; m = m->m_next)
  110                 len += m->m_len;
  111         up += 2;                /* skip header */
  112         while (up < uplim)
  113                 switch (*up) {  /* process options */
  114                 case CLTPOVAL_SRC:
  115                         src->siso_tlen = up[1];
  116                         src->siso_len = up[1] + TSEL(src) - (caddr_t) src;
  117                         if (src->siso_len < sizeof(*src))
  118                                 src->siso_len = sizeof(*src);
  119                         else if (src->siso_len > sizeof(*src)) {
  120                                 MGET(m_src, M_DONTWAIT, MT_SONAME);
  121                                 if (m_src == 0)
  122                                         goto bad;
  123                                 m_src->m_len = src->siso_len;
  124                                 src = mtod(m_src, struct sockaddr_iso *);
  125                                 bcopy((caddr_t) srcsa, (caddr_t) src, srcsa->sa_len);
  126                         }
  127                         bcopy((caddr_t) up + 2, TSEL(src), up[1]);
  128                         up += 2 + src->siso_tlen;
  129                         continue;
  130 
  131                 case CLTPOVAL_DST:
  132                         dtsap = 2 + (caddr_t) up;
  133                         dlen = up[1];
  134                         up += 2 + dlen;
  135                         continue;
  136 
  137                 case CLTPOVAL_CSM:
  138                         if (iso_check_csum(m0, len)) {
  139                                 cltpstat.cltps_badsum++;
  140                                 goto bad;
  141                         }
  142                         up += 4;
  143                         continue;
  144 
  145                 default:
  146                         printf("clts: unknown option (%x)\n", up[0]);
  147                         cltpstat.cltps_hdrops++;
  148                         goto bad;
  149                 }
  150         if (dlen == 0 || src->siso_tlen == 0)
  151                 goto bad;
  152         for (isop = cltb.isop_next;; isop = isop->isop_next) {
  153                 if (isop == &cltb) {
  154                         cltpstat.cltps_noport++;
  155                         goto bad;
  156                 }
  157                 if (isop->isop_laddr &&
  158                     bcmp(TSEL(isop->isop_laddr), dtsap, dlen) == 0)
  159                         break;
  160         }
  161         m = m0;
  162         m->m_len -= hdrlen;
  163         m->m_data += hdrlen;
  164         if (sbappendaddr(&isop->isop_socket->so_rcv, sisotosa(src), m,
  165                          (struct mbuf *) 0) == 0)
  166                 goto bad;
  167         cltpstat.cltps_ipackets++;
  168         sorwakeup(isop->isop_socket);
  169         m0 = 0;
  170 bad:
  171         if (src != satosiso(srcsa))
  172                 m_freem(m_src);
  173         if (m0)
  174                 m_freem(m0);
  175 }
  176 
  177 /*
  178  * Notify a cltp user of an asynchronous error;
  179  * just wake up so that he can collect error status.
  180  */
  181 void
  182 cltp_notify(isop)
  183         struct isopcb *isop;
  184 {
  185 
  186         sorwakeup(isop->isop_socket);
  187         sowwakeup(isop->isop_socket);
  188 }
  189 
  190 void
  191 cltp_ctlinput(cmd, sa, dummy)
  192         int             cmd;
  193         struct sockaddr *sa;
  194         void *dummy;
  195 {
  196         extern u_char   inetctlerrmap[];
  197         struct sockaddr_iso *siso;
  198 
  199         if ((unsigned)cmd >= PRC_NCMDS)
  200                 return;
  201         if (sa->sa_family != AF_ISO && sa->sa_family != AF_CCITT)
  202                 return;
  203         siso = satosiso(sa);
  204         if (siso == 0 || siso->siso_nlen == 0)
  205                 return;
  206 
  207         switch (cmd) {
  208         case PRC_ROUTEDEAD:
  209         case PRC_REDIRECT_NET:
  210         case PRC_REDIRECT_HOST:
  211         case PRC_REDIRECT_TOSNET:
  212         case PRC_REDIRECT_TOSHOST:
  213                 iso_pcbnotify(&cltb, siso,
  214                               (int) inetctlerrmap[cmd], iso_rtchange);
  215                 break;
  216 
  217         default:
  218                 if (inetctlerrmap[cmd] == 0)
  219                         return; /* XXX */
  220                 iso_pcbnotify(&cltb, siso, (int) inetctlerrmap[cmd],
  221                               cltp_notify);
  222         }
  223 }
  224 
  225 int
  226 #if __STDC__
  227 cltp_output(struct mbuf *m, ...)
  228 #else
  229 cltp_output(m, va_alist)
  230         struct mbuf *m;
  231         va_dcl
  232 #endif
  233 {
  234         struct isopcb *isop;
  235         int    len;
  236         struct sockaddr_iso *siso;
  237         int             hdrlen, error = 0, docsum;
  238         u_char *up;
  239         va_list ap;
  240 
  241         va_start(ap, m);
  242         isop = va_arg(ap, struct isopcb *);
  243         va_end(ap);
  244 
  245         if (isop->isop_laddr == 0 || isop->isop_faddr == 0) {
  246                 error = ENOTCONN;
  247                 goto bad;
  248         }
  249         /*
  250          * Calculate data length and get a mbuf for CLTP header.
  251          */
  252         hdrlen = 2 + 2 + isop->isop_laddr->siso_tlen
  253                 + 2 + isop->isop_faddr->siso_tlen;
  254         docsum = /* isop->isop_flags & CLNP_NO_CKSUM */ cltp_cksum;
  255         if (docsum)
  256                 hdrlen += 4;
  257         M_PREPEND(m, hdrlen, M_WAIT);
  258         len = m->m_pkthdr.len;
  259         /*
  260          * Fill in mbuf with extended CLTP header
  261          */
  262         up = mtod(m, u_char *);
  263         up[0] = hdrlen - 1;
  264         up[1] = UD_TPDU_type;
  265         up[2] = CLTPOVAL_SRC;
  266         up[3] = (siso = isop->isop_laddr)->siso_tlen;
  267         up += 4;
  268         bcopy(TSEL(siso), (caddr_t) up, siso->siso_tlen);
  269         up += siso->siso_tlen;
  270         up[0] = CLTPOVAL_DST;
  271         up[1] = (siso = isop->isop_faddr)->siso_tlen;
  272         up += 2;
  273         bcopy(TSEL(siso), (caddr_t) up, siso->siso_tlen);
  274         /*
  275          * Stuff checksum and output datagram.
  276          */
  277         if (docsum) {
  278                 up += siso->siso_tlen;
  279                 up[0] = CLTPOVAL_CSM;
  280                 up[1] = 2;
  281                 iso_gen_csum(m, 2 + up - mtod(m, u_char *), len);
  282         }
  283         cltpstat.cltps_opackets++;
  284         return (tpclnp_output(m, len, isop, !docsum));
  285 bad:
  286         m_freem(m);
  287         return (error);
  288 }
  289 
  290 u_long          cltp_sendspace = 9216;  /* really max datagram size */
  291 u_long          cltp_recvspace = 40 * (1024 + sizeof(struct sockaddr_iso));
  292 /* 40 1K datagrams */
  293 
  294 
  295 /* ARGSUSED */
  296 int
  297 cltp_usrreq(so, req, m, nam, control, p)
  298         struct socket *so;
  299         int req;
  300         struct mbuf *m, *nam, *control;
  301         struct proc *p;
  302 {
  303         struct isopcb *isop;
  304         int s;
  305         int error = 0;
  306 
  307         if (req == PRU_CONTROL)
  308                 return (iso_control(so, (long)m, (caddr_t)nam,
  309                     (struct ifnet *)control, p));
  310 
  311         if (req == PRU_PURGEIF) {
  312                 iso_purgeif((struct ifnet *)control);
  313                 return (0);
  314         }
  315 
  316         s = splsoftnet();
  317         isop = sotoisopcb(so);
  318 #ifdef DIAGNOSTIC
  319         if (req != PRU_SEND && req != PRU_SENDOOB && control)
  320                 panic("cltp_usrreq: unexpected control mbuf");
  321 #endif
  322         if (isop == 0 && req != PRU_ATTACH) {
  323                 error = EINVAL;
  324                 goto release;
  325         }
  326 
  327         switch (req) {
  328 
  329         case PRU_ATTACH:
  330                 if (isop != 0) {
  331                         error = EISCONN;
  332                         break;
  333                 }
  334                 if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) {
  335                         error = soreserve(so, cltp_sendspace, cltp_recvspace);
  336                         if (error)
  337                                 break;
  338                 }
  339                 error = iso_pcballoc(so, &cltb);
  340                 if (error)
  341                         break;
  342                 break;
  343 
  344         case PRU_DETACH:
  345                 iso_pcbdetach(isop);
  346                 break;
  347 
  348         case PRU_BIND:
  349                 error = iso_pcbbind(isop, nam, p);
  350                 break;
  351 
  352         case PRU_LISTEN:
  353                 error = EOPNOTSUPP;
  354                 break;
  355 
  356         case PRU_CONNECT:
  357                 error = iso_pcbconnect(isop, nam);
  358                 if (error)
  359                         break;
  360                 soisconnected(so);
  361                 break;
  362 
  363         case PRU_CONNECT2:
  364                 error = EOPNOTSUPP;
  365                 break;
  366 
  367         case PRU_DISCONNECT:
  368                 soisdisconnected(so);
  369                 iso_pcbdisconnect(isop);
  370                 break;
  371 
  372         case PRU_SHUTDOWN:
  373                 socantsendmore(so);
  374                 break;
  375 
  376         case PRU_RCVD:
  377                 error = EOPNOTSUPP;
  378                 break;
  379 
  380         case PRU_SEND:
  381                 if (control && control->m_len) {
  382                         m_freem(control);
  383                         m_freem(m);
  384                         error = EINVAL;
  385                         break;
  386                 }
  387                 if (nam) {
  388                         if ((so->so_state & SS_ISCONNECTED) != 0) {
  389                                 error = EISCONN;
  390                                 goto die;
  391                         }
  392                         error = iso_pcbconnect(isop, nam);
  393                         if (error) {
  394                         die:
  395                                 m_freem(m);
  396                                 break;
  397                         }
  398                 } else {
  399                         if ((so->so_state & SS_ISCONNECTED) == 0) {
  400                                 error = ENOTCONN;
  401                                 goto die;
  402                         }
  403                 }
  404                 error = cltp_output(m, isop);
  405                 if (nam)
  406                         iso_pcbdisconnect(isop);
  407                 break;
  408 
  409         case PRU_SENSE:
  410                 /*
  411                  * stat: don't bother with a blocksize.
  412                  */
  413                 splx(s);
  414                 return (0);
  415 
  416         case PRU_RCVOOB:
  417                 error = EOPNOTSUPP;
  418                 break;
  419 
  420         case PRU_SENDOOB:
  421                 m_freem(control);
  422                 m_freem(m);
  423                 error = EOPNOTSUPP;
  424                 break;
  425 
  426         case PRU_SOCKADDR:
  427                 iso_getnetaddr(isop, nam, TP_LOCAL);
  428                 break;
  429 
  430         case PRU_PEERADDR:
  431                 iso_getnetaddr(isop, nam, TP_FOREIGN);
  432                 break;
  433 
  434         default:
  435                 panic("cltp_usrreq");
  436         }
  437 
  438 release:
  439         splx(s);
  440         return (error);
  441 }

Cache object: 94973cef7a9628d1e4daab1002c39c9f


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