raw_usrreq.c

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    1 /*
    2  * Copyright (c) 1980, 1986, 1993
    3  *      The Regents of the University of California.  All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  * 3. All advertising materials mentioning features or use of this software
   14  *    must display the following acknowledgement:
   15  *      This product includes software developed by the University of
   16  *      California, Berkeley and its contributors.
   17  * 4. Neither the name of the University nor the names of its contributors
   18  *    may be used to endorse or promote products derived from this software
   19  *    without specific prior written permission.
   20  *
   21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   31  * SUCH DAMAGE.
   32  *
   33  *      @(#)raw_usrreq.c        8.1 (Berkeley) 6/10/93
   34  * $FreeBSD: releng/5.0/sys/net/raw_usrreq.c 107113 2002-11-20 19:00:54Z luigi $
   35  */
   36 
   37 #include <sys/param.h>
   38 #include <sys/lock.h>
   39 #include <sys/mbuf.h>
   40 #include <sys/protosw.h>
   41 #include <sys/signalvar.h>
   42 #include <sys/socket.h>
   43 #include <sys/socketvar.h>
   44 #include <sys/sx.h>
   45 #include <sys/systm.h>
   46 
   47 #include <net/raw_cb.h>
   48 
   49 /*
   50  * Initialize raw connection block q.
   51  */
   52 void
   53 raw_init()
   54 {
   55         LIST_INIT(&rawcb_list);
   56 }
   57 
   58 
   59 /*
   60  * Raw protocol input routine.  Find the socket
   61  * associated with the packet(s) and move them over.  If
   62  * nothing exists for this packet, drop it.
   63  */
   64 /*
   65  * Raw protocol interface.
   66  */
   67 void
   68 raw_input(m0, proto, src, dst)
   69         struct mbuf *m0;
   70         register struct sockproto *proto;
   71         struct sockaddr *src, *dst;
   72 {
   73         register struct rawcb *rp;
   74         register struct mbuf *m = m0;
   75         register int sockets = 0;
   76         struct socket *last;
   77 
   78         last = 0;
   79         LIST_FOREACH(rp, &rawcb_list, list) {
   80                 if (rp->rcb_proto.sp_family != proto->sp_family)
   81                         continue;
   82                 if (rp->rcb_proto.sp_protocol  &&
   83                     rp->rcb_proto.sp_protocol != proto->sp_protocol)
   84                         continue;
   85                 /*
   86                  * We assume the lower level routines have
   87                  * placed the address in a canonical format
   88                  * suitable for a structure comparison.
   89                  *
   90                  * Note that if the lengths are not the same
   91                  * the comparison will fail at the first byte.
   92                  */
   93 #define equal(a1, a2) \
   94   (bcmp((caddr_t)(a1), (caddr_t)(a2), a1->sa_len) == 0)
   95                 if (rp->rcb_laddr && !equal(rp->rcb_laddr, dst))
   96                         continue;
   97                 if (rp->rcb_faddr && !equal(rp->rcb_faddr, src))
   98                         continue;
   99                 if (last) {
  100                         struct mbuf *n;
  101                         n = m_copy(m, 0, (int)M_COPYALL);
  102                         if (n) {
  103                                 if (sbappendaddr(&last->so_rcv, src,
  104                                     n, (struct mbuf *)0) == 0)
  105                                         /* should notify about lost packet */
  106                                         m_freem(n);
  107                                 else {
  108                                         sorwakeup(last);
  109                                         sockets++;
  110                                 }
  111                         }
  112                 }
  113                 last = rp->rcb_socket;
  114         }
  115         if (last) {
  116                 if (sbappendaddr(&last->so_rcv, src,
  117                     m, (struct mbuf *)0) == 0)
  118                         m_freem(m);
  119                 else {
  120                         sorwakeup(last);
  121                         sockets++;
  122                 }
  123         } else
  124                 m_freem(m);
  125 }
  126 
  127 /*ARGSUSED*/
  128 void
  129 raw_ctlinput(cmd, arg, dummy)
  130         int cmd;
  131         struct sockaddr *arg;
  132         void *dummy;
  133 {
  134 
  135         if (cmd < 0 || cmd > PRC_NCMDS)
  136                 return;
  137         /* INCOMPLETE */
  138 }
  139 
  140 static int
  141 raw_uabort(struct socket *so)
  142 {
  143         struct rawcb *rp = sotorawcb(so);
  144 
  145         if (rp == 0)
  146                 return EINVAL;
  147         raw_disconnect(rp);
  148         sotryfree(so);
  149         soisdisconnected(so);   /* XXX huh? called after the sofree()? */
  150         return 0;
  151 }
  152 
  153 /* pru_accept is EOPNOTSUPP */
  154 
  155 static int
  156 raw_uattach(struct socket *so, int proto, struct thread *td)
  157 {
  158         struct rawcb *rp = sotorawcb(so);
  159         int error;
  160 
  161         if (rp == 0)
  162                 return EINVAL;
  163         if (td && (error = suser(td)) != 0)
  164                 return error;
  165         return raw_attach(so, proto);
  166 }
  167 
  168 static int
  169 raw_ubind(struct socket *so, struct sockaddr *nam, struct thread *td)
  170 {
  171         return EINVAL;
  172 }
  173 
  174 static int
  175 raw_uconnect(struct socket *so, struct sockaddr *nam, struct thread *td)
  176 {
  177         return EINVAL;
  178 }
  179 
  180 /* pru_connect2 is EOPNOTSUPP */
  181 /* pru_control is EOPNOTSUPP */
  182 
  183 static int
  184 raw_udetach(struct socket *so)
  185 {
  186         struct rawcb *rp = sotorawcb(so);
  187 
  188         if (rp == 0)
  189                 return EINVAL;
  190 
  191         raw_detach(rp);
  192         return 0;
  193 }
  194 
  195 static int
  196 raw_udisconnect(struct socket *so)
  197 {
  198         struct rawcb *rp = sotorawcb(so);
  199 
  200         if (rp == 0)
  201                 return EINVAL;
  202         if (rp->rcb_faddr == 0) {
  203                 return ENOTCONN;
  204         }
  205         raw_disconnect(rp);
  206         soisdisconnected(so);
  207         return 0;
  208 }
  209 
  210 /* pru_listen is EOPNOTSUPP */
  211 
  212 static int
  213 raw_upeeraddr(struct socket *so, struct sockaddr **nam)
  214 {
  215         struct rawcb *rp = sotorawcb(so);
  216 
  217         if (rp == 0)
  218                 return EINVAL;
  219         if (rp->rcb_faddr == 0) {
  220                 return ENOTCONN;
  221         }
  222         *nam = dup_sockaddr(rp->rcb_faddr, 1);
  223         return 0;
  224 }
  225 
  226 /* pru_rcvd is EOPNOTSUPP */
  227 /* pru_rcvoob is EOPNOTSUPP */
  228 
  229 static int
  230 raw_usend(struct socket *so, int flags, struct mbuf *m,
  231           struct sockaddr *nam, struct mbuf *control, struct thread *td)
  232 {
  233         int error;
  234         struct rawcb *rp = sotorawcb(so);
  235 
  236         if (rp == 0) {
  237                 error = EINVAL;
  238                 goto release;
  239         }
  240 
  241         if (flags & PRUS_OOB) {
  242                 error = EOPNOTSUPP;
  243                 goto release;
  244         }
  245 
  246         if (control && control->m_len) {
  247                 error = EOPNOTSUPP;
  248                 goto release;
  249         }
  250         if (nam) {
  251                 if (rp->rcb_faddr) {
  252                         error = EISCONN;
  253                         goto release;
  254                 }
  255                 rp->rcb_faddr = nam;
  256         } else if (rp->rcb_faddr == 0) {
  257                 error = ENOTCONN;
  258                 goto release;
  259         }
  260         error = (*so->so_proto->pr_output)(m, so);
  261         m = NULL;
  262         if (nam)
  263                 rp->rcb_faddr = 0;
  264 release:
  265         if (m != NULL)
  266                 m_freem(m);
  267         return (error);
  268 }
  269 
  270 /* pru_sense is null */
  271 
  272 static int
  273 raw_ushutdown(struct socket *so)
  274 {
  275         struct rawcb *rp = sotorawcb(so);
  276 
  277         if (rp == 0)
  278                 return EINVAL;
  279         socantsendmore(so);
  280         return 0;
  281 }
  282 
  283 static int
  284 raw_usockaddr(struct socket *so, struct sockaddr **nam)
  285 {
  286         struct rawcb *rp = sotorawcb(so);
  287 
  288         if (rp == 0)
  289                 return EINVAL;
  290         if (rp->rcb_laddr == 0)
  291                 return EINVAL;
  292         *nam = dup_sockaddr(rp->rcb_laddr, 1);
  293         return 0;
  294 }
  295 
  296 struct pr_usrreqs raw_usrreqs = {
  297         raw_uabort, pru_accept_notsupp, raw_uattach, raw_ubind, raw_uconnect,
  298         pru_connect2_notsupp, pru_control_notsupp, raw_udetach, 
  299         raw_udisconnect, pru_listen_notsupp, raw_upeeraddr, pru_rcvd_notsupp,
  300         pru_rcvoob_notsupp, raw_usend, pru_sense_null, raw_ushutdown,
  301         raw_usockaddr, sosend, soreceive, sopoll
  302 };

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FreeBSD/Linux Kernel Cross Reference sys/net/raw_usrreq.c

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sys/net/raw_usrreq.c