raw_usrreq.c

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    1 /*
    2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
    3  *
    4  * @APPLE_LICENSE_HEADER_START@
    5  * 
    6  * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
    7  * 
    8  * This file contains Original Code and/or Modifications of Original Code
    9  * as defined in and that are subject to the Apple Public Source License
   10  * Version 2.0 (the 'License'). You may not use this file except in
   11  * compliance with the License. Please obtain a copy of the License at
   12  * http://www.opensource.apple.com/apsl/ and read it before using this
   13  * file.
   14  * 
   15  * The Original Code and all software distributed under the License are
   16  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
   17  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
   18  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
   19  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
   20  * Please see the License for the specific language governing rights and
   21  * limitations under the License.
   22  * 
   23  * @APPLE_LICENSE_HEADER_END@
   24  */
   25 /*
   26  * Copyright (c) 1980, 1986, 1993
   27  *      The Regents of the University of California.  All rights reserved.
   28  *
   29  * Redistribution and use in source and binary forms, with or without
   30  * modification, are permitted provided that the following conditions
   31  * are met:
   32  * 1. Redistributions of source code must retain the above copyright
   33  *    notice, this list of conditions and the following disclaimer.
   34  * 2. Redistributions in binary form must reproduce the above copyright
   35  *    notice, this list of conditions and the following disclaimer in the
   36  *    documentation and/or other materials provided with the distribution.
   37  * 3. All advertising materials mentioning features or use of this software
   38  *    must display the following acknowledgement:
   39  *      This product includes software developed by the University of
   40  *      California, Berkeley and its contributors.
   41  * 4. Neither the name of the University nor the names of its contributors
   42  *    may be used to endorse or promote products derived from this software
   43  *    without specific prior written permission.
   44  *
   45  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   46  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   47  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   48  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   49  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   50  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   51  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   52  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   53  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   54  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   55  * SUCH DAMAGE.
   56  *
   57  *      @(#)raw_usrreq.c        8.1 (Berkeley) 6/10/93
   58  * $FreeBSD: src/sys/net/raw_usrreq.c,v 1.18 1999/08/28 00:48:28 peter Exp $
   59  */
   60 
   61 #include <sys/param.h>
   62 #include <sys/systm.h>
   63 #include <sys/mbuf.h>
   64 #include <sys/proc.h>
   65 #include <sys/protosw.h>
   66 #include <sys/socket.h>
   67 #include <sys/socketvar.h>
   68 
   69 #include <net/raw_cb.h>
   70 
   71 /*
   72  * Initialize raw connection block q.
   73  */
   74 void
   75 raw_init()
   76 {
   77         LIST_INIT(&rawcb_list);
   78 }
   79 
   80 
   81 /*
   82  * Raw protocol input routine.  Find the socket
   83  * associated with the packet(s) and move them over.  If
   84  * nothing exists for this packet, drop it.
   85  */
   86 /*
   87  * Raw protocol interface.
   88  */
   89 void
   90 raw_input(m0, proto, src, dst)
   91         struct mbuf *m0;
   92         register struct sockproto *proto;
   93         struct sockaddr *src, *dst;
   94 {
   95         register struct rawcb *rp;
   96         register struct mbuf *m = m0;
   97         register int sockets = 0;
   98         struct socket *last;
   99 
  100         last = 0;
  101         LIST_FOREACH(rp, &rawcb_list, list) {
  102                 if (rp->rcb_proto.sp_family != proto->sp_family)
  103                         continue;
  104                 if (rp->rcb_proto.sp_protocol  &&
  105                     rp->rcb_proto.sp_protocol != proto->sp_protocol)
  106                         continue;
  107                 /*
  108                  * We assume the lower level routines have
  109                  * placed the address in a canonical format
  110                  * suitable for a structure comparison.
  111                  *
  112                  * Note that if the lengths are not the same
  113                  * the comparison will fail at the first byte.
  114                  */
  115 #define equal(a1, a2) \
  116   (bcmp((caddr_t)(a1), (caddr_t)(a2), a1->sa_len) == 0)
  117                 if (rp->rcb_laddr && !equal(rp->rcb_laddr, dst))
  118                         continue;
  119                 if (rp->rcb_faddr && !equal(rp->rcb_faddr, src))
  120                         continue;
  121                 if (last) {
  122                         struct mbuf *n;
  123                         n = m_copy(m, 0, (int)M_COPYALL);
  124                         if (n) {
  125                                 if (sbappendaddr(&last->so_rcv, src,
  126                                     n, (struct mbuf *)0) == 0)
  127                                         /* should notify about lost packet */
  128                                         m_freem(n);
  129                                 else {
  130                                         sorwakeup(last);
  131                                         sockets++;
  132                                 }
  133                         }
  134                 }
  135                 last = rp->rcb_socket;
  136         }
  137         if (last) {
  138                 if (sbappendaddr(&last->so_rcv, src,
  139                     m, (struct mbuf *)0) == 0)
  140                         m_freem(m);
  141                 else {
  142                         sorwakeup(last);
  143                         sockets++;
  144                 }
  145         } else
  146                 m_freem(m);
  147 }
  148 
  149 /*ARGSUSED*/
  150 void
  151 raw_ctlinput(cmd, arg, dummy)
  152         int cmd;
  153         struct sockaddr *arg;
  154         void *dummy;
  155 {
  156 
  157         if (cmd < 0 || cmd > PRC_NCMDS)
  158                 return;
  159         /* INCOMPLETE */
  160 }
  161 
  162 static int
  163 raw_uabort(struct socket *so)
  164 {
  165         struct rawcb *rp = sotorawcb(so);
  166 
  167         if (rp == 0)
  168                 return EINVAL;
  169         raw_disconnect(rp);
  170         sofree(so);
  171         soisdisconnected(so);
  172         return 0;
  173 }
  174 
  175 /* pru_accept is EOPNOTSUPP */
  176 
  177 static int
  178 raw_uattach(struct socket *so, int proto, struct proc *p)
  179 {
  180         struct rawcb *rp = sotorawcb(so);
  181         int error;
  182 
  183         if (rp == 0)
  184                 return EINVAL;
  185 #ifdef __APPLE__
  186                 if ((so->so_state & SS_PRIV) == 0)
  187                         return (EPERM);
  188 #else
  189         if (p && (error = suser(p)) != 0)
  190                 return error;
  191 #endif
  192         return raw_attach(so, proto);
  193 }
  194 
  195 static int
  196 raw_ubind(struct socket *so, struct sockaddr *nam, struct proc *p)
  197 {
  198         return EINVAL;
  199 }
  200 
  201 static int
  202 raw_uconnect(struct socket *so, struct sockaddr *nam, struct proc *p)
  203 {
  204         return EINVAL;
  205 }
  206 
  207 /* pru_connect2 is EOPNOTSUPP */
  208 /* pru_control is EOPNOTSUPP */
  209 
  210 static int
  211 raw_udetach(struct socket *so)
  212 {
  213         struct rawcb *rp = sotorawcb(so);
  214 
  215         if (rp == 0)
  216                 return EINVAL;
  217 
  218         raw_detach(rp);
  219         return 0;
  220 }
  221 
  222 static int
  223 raw_udisconnect(struct socket *so)
  224 {
  225         struct rawcb *rp = sotorawcb(so);
  226 
  227         if (rp == 0)
  228                 return EINVAL;
  229         if (rp->rcb_faddr == 0) {
  230                 return ENOTCONN;
  231         }
  232         raw_disconnect(rp);
  233         soisdisconnected(so);
  234         return 0;
  235 }
  236 
  237 /* pru_listen is EOPNOTSUPP */
  238 
  239 static int
  240 raw_upeeraddr(struct socket *so, struct sockaddr **nam)
  241 {
  242         struct rawcb *rp = sotorawcb(so);
  243 
  244         if (rp == 0)
  245                 return EINVAL;
  246         if (rp->rcb_faddr == 0) {
  247                 return ENOTCONN;
  248         }
  249         *nam = dup_sockaddr(rp->rcb_faddr, 1);
  250         return 0;
  251 }
  252 
  253 /* pru_rcvd is EOPNOTSUPP */
  254 /* pru_rcvoob is EOPNOTSUPP */
  255 
  256 static int
  257 raw_usend(struct socket *so, int flags, struct mbuf *m,
  258           struct sockaddr *nam, struct mbuf *control, struct proc *p)
  259 {
  260         int error;
  261         struct rawcb *rp = sotorawcb(so);
  262 
  263         if (rp == 0) {
  264                 error = EINVAL;
  265                 goto release;
  266         }
  267 
  268         if (flags & PRUS_OOB) {
  269                 error = EOPNOTSUPP;
  270                 goto release;
  271         }
  272 
  273         if (control && control->m_len) {
  274                 error = EOPNOTSUPP;
  275                 goto release;
  276         }
  277         if (nam) {
  278                 if (rp->rcb_faddr) {
  279                         error = EISCONN;
  280                         goto release;
  281                 }
  282                 rp->rcb_faddr = nam;
  283         } else if (rp->rcb_faddr == 0) {
  284                 error = ENOTCONN;
  285                 goto release;
  286         }
  287         error = (*so->so_proto->pr_output)(m, so);
  288         m = NULL;
  289         if (nam)
  290                 rp->rcb_faddr = 0;
  291 release:
  292         if (m != NULL)
  293                 m_freem(m);
  294         return (error);
  295 }
  296 
  297 /* pru_sense is null */
  298 
  299 static int
  300 raw_ushutdown(struct socket *so)
  301 {
  302         struct rawcb *rp = sotorawcb(so);
  303 
  304         if (rp == 0)
  305                 return EINVAL;
  306         socantsendmore(so);
  307         return 0;
  308 }
  309 
  310 static int
  311 raw_usockaddr(struct socket *so, struct sockaddr **nam)
  312 {
  313         struct rawcb *rp = sotorawcb(so);
  314 
  315         if (rp == 0)
  316                 return EINVAL;
  317         if (rp->rcb_laddr == 0)
  318                 return EINVAL;
  319         *nam = dup_sockaddr(rp->rcb_laddr, 1);
  320         return 0;
  321 }
  322 
  323 struct pr_usrreqs raw_usrreqs = {
  324         raw_uabort, pru_accept_notsupp, raw_uattach, raw_ubind, raw_uconnect,
  325         pru_connect2_notsupp, pru_control_notsupp, raw_udetach, 
  326         raw_udisconnect, pru_listen_notsupp, raw_upeeraddr, pru_rcvd_notsupp,
  327         pru_rcvoob_notsupp, raw_usend, pru_sense_null, raw_ushutdown,
  328         raw_usockaddr, sosend, soreceive, sopoll
  329 };
Cache object: 1ce338bf6d9b910188919e56d40476ce
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FreeBSD/Linux Kernel Cross Reference sys/bsd/net/raw_usrreq.c

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