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  * $FreeBSD$
   35  */
   36 
   37 #include <sys/param.h>
   38 #include <sys/systm.h>
   39 #include <sys/mbuf.h>
   40 #include <sys/proc.h>
   41 #include <sys/protosw.h>
   42 #include <sys/socket.h>
   43 #include <sys/socketvar.h>
   44 
   45 #include <net/raw_cb.h>
   46 
   47 /*
   48  * Initialize raw connection block q.
   49  */
   50 void
   51 raw_init()
   52 {
   53         LIST_INIT(&rawcb_list);
   54 }
   55 
   56 
   57 /*
   58  * Raw protocol input routine.  Find the socket
   59  * associated with the packet(s) and move them over.  If
   60  * nothing exists for this packet, drop it.
   61  */
   62 /*
   63  * Raw protocol interface.
   64  */
   65 void
   66 raw_input(m0, proto, src, dst)
   67         struct mbuf *m0;
   68         register struct sockproto *proto;
   69         struct sockaddr *src, *dst;
   70 {
   71         register struct rawcb *rp;
   72         register struct mbuf *m = m0;
   73         register int sockets = 0;
   74         struct socket *last;
   75 
   76         last = 0;
   77         LIST_FOREACH(rp, &rawcb_list, list) {
   78                 if (rp->rcb_proto.sp_family != proto->sp_family)
   79                         continue;
   80                 if (rp->rcb_proto.sp_protocol  &&
   81                     rp->rcb_proto.sp_protocol != proto->sp_protocol)
   82                         continue;
   83                 /*
   84                  * We assume the lower level routines have
   85                  * placed the address in a canonical format
   86                  * suitable for a structure comparison.
   87                  *
   88                  * Note that if the lengths are not the same
   89                  * the comparison will fail at the first byte.
   90                  */
   91 #define equal(a1, a2) \
   92   (bcmp((caddr_t)(a1), (caddr_t)(a2), a1->sa_len) == 0)
   93                 if (rp->rcb_laddr && !equal(rp->rcb_laddr, dst))
   94                         continue;
   95                 if (rp->rcb_faddr && !equal(rp->rcb_faddr, src))
   96                         continue;
   97                 if (last) {
   98                         struct mbuf *n;
   99                         n = m_copy(m, 0, (int)M_COPYALL);
  100                         if (n) {
  101                                 if (sbappendaddr(&last->so_rcv, src,
  102                                     n, (struct mbuf *)0) == 0)
  103                                         /* should notify about lost packet */
  104                                         m_freem(n);
  105                                 else {
  106                                         sorwakeup(last);
  107                                         sockets++;
  108                                 }
  109                         }
  110                 }
  111                 last = rp->rcb_socket;
  112         }
  113         if (last) {
  114                 if (sbappendaddr(&last->so_rcv, src,
  115                     m, (struct mbuf *)0) == 0)
  116                         m_freem(m);
  117                 else {
  118                         sorwakeup(last);
  119                         sockets++;
  120                 }
  121         } else
  122                 m_freem(m);
  123 }
  124 
  125 /*ARGSUSED*/
  126 void
  127 raw_ctlinput(cmd, arg, dummy)
  128         int cmd;
  129         struct sockaddr *arg;
  130         void *dummy;
  131 {
  132 
  133         if (cmd < 0 || cmd > PRC_NCMDS)
  134                 return;
  135         /* INCOMPLETE */
  136 }
  137 
  138 static int
  139 raw_uabort(struct socket *so)
  140 {
  141         struct rawcb *rp = sotorawcb(so);
  142 
  143         if (rp == 0)
  144                 return EINVAL;
  145         raw_disconnect(rp);
  146         sofree(so);
  147         soisdisconnected(so);
  148         return 0;
  149 }
  150 
  151 /* pru_accept is EOPNOTSUPP */
  152 
  153 static int
  154 raw_uattach(struct socket *so, int proto, struct proc *p)
  155 {
  156         struct rawcb *rp = sotorawcb(so);
  157         int error;
  158 
  159         if (rp == 0)
  160                 return EINVAL;
  161         if (p && (error = suser(p->p_ucred, &p->p_acflag)) != 0)
  162                 return error;
  163         return raw_attach(so, proto);
  164 }
  165 
  166 static int
  167 raw_ubind(struct socket *so, struct sockaddr *nam, struct proc *p)
  168 {
  169         return EINVAL;
  170 }
  171 
  172 static int
  173 raw_uconnect(struct socket *so, struct sockaddr *nam, struct proc *p)
  174 {
  175         return EINVAL;
  176 }
  177 
  178 /* pru_connect2 is EOPNOTSUPP */
  179 /* pru_control is EOPNOTSUPP */
  180 
  181 static int
  182 raw_udetach(struct socket *so)
  183 {
  184         struct rawcb *rp = sotorawcb(so);
  185 
  186         if (rp == 0)
  187                 return EINVAL;
  188 
  189         raw_detach(rp);
  190         return 0;
  191 }
  192 
  193 static int
  194 raw_udisconnect(struct socket *so)
  195 {
  196         struct rawcb *rp = sotorawcb(so);
  197 
  198         if (rp == 0)
  199                 return EINVAL;
  200         if (rp->rcb_faddr == 0) {
  201                 return ENOTCONN;
  202         }
  203         raw_disconnect(rp);
  204         soisdisconnected(so);
  205         return 0;
  206 }
  207 
  208 /* pru_listen is EOPNOTSUPP */
  209 
  210 static int
  211 raw_upeeraddr(struct socket *so, struct sockaddr **nam)
  212 {
  213         struct rawcb *rp = sotorawcb(so);
  214 
  215         if (rp == 0)
  216                 return EINVAL;
  217         if (rp->rcb_faddr == 0) {
  218                 return ENOTCONN;
  219         }
  220         *nam = dup_sockaddr(rp->rcb_faddr, 1);
  221         return 0;
  222 }
  223 
  224 /* pru_rcvd is EOPNOTSUPP */
  225 /* pru_rcvoob is EOPNOTSUPP */
  226 
  227 static int
  228 raw_usend(struct socket *so, int flags, struct mbuf *m,
  229           struct sockaddr *nam, struct mbuf *control, struct proc *p)
  230 {
  231         int error;
  232         struct rawcb *rp = sotorawcb(so);
  233 
  234         if (rp == 0) {
  235                 error = EINVAL;
  236                 goto release;
  237         }
  238 
  239         if (flags & PRUS_OOB) {
  240                 error = EOPNOTSUPP;
  241                 goto release;
  242         }
  243 
  244         if (control && control->m_len) {
  245                 error = EOPNOTSUPP;
  246                 goto release;
  247         }
  248         if (nam) {
  249                 if (rp->rcb_faddr) {
  250                         error = EISCONN;
  251                         goto release;
  252                 }
  253                 rp->rcb_faddr = nam;
  254         } else if (rp->rcb_faddr == 0) {
  255                 error = ENOTCONN;
  256                 goto release;
  257         }
  258         error = (*so->so_proto->pr_output)(m, so);
  259         m = NULL;
  260         if (nam)
  261                 rp->rcb_faddr = 0;
  262 release:
  263         if (m != NULL)
  264                 m_freem(m);
  265         return (error);
  266 }
  267 
  268 /* pru_sense is null */
  269 
  270 static int
  271 raw_ushutdown(struct socket *so)
  272 {
  273         struct rawcb *rp = sotorawcb(so);
  274 
  275         if (rp == 0)
  276                 return EINVAL;
  277         socantsendmore(so);
  278         return 0;
  279 }
  280 
  281 static int
  282 raw_usockaddr(struct socket *so, struct sockaddr **nam)
  283 {
  284         struct rawcb *rp = sotorawcb(so);
  285 
  286         if (rp == 0)
  287                 return EINVAL;
  288         if (rp->rcb_laddr == 0)
  289                 return EINVAL;
  290         *nam = dup_sockaddr(rp->rcb_laddr, 1);
  291         return 0;
  292 }
  293 
  294 struct pr_usrreqs raw_usrreqs = {
  295         raw_uabort, pru_accept_notsupp, raw_uattach, raw_ubind, raw_uconnect,
  296         pru_connect2_notsupp, pru_control_notsupp, raw_udetach, 
  297         raw_udisconnect, pru_listen_notsupp, raw_upeeraddr, pru_rcvd_notsupp,
  298         pru_rcvoob_notsupp, raw_usend, pru_sense_null, raw_ushutdown,
  299         raw_usockaddr, sosend, soreceive, sopoll
  300 };

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

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sys/net/raw_usrreq.c