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

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    1 /*-
    2  * Copyright (c) 1980, 1986, 1993
    3  *      The Regents of the University of California.
    4  * All rights reserved.
    5  *
    6  * Redistribution and use in source and binary forms, with or without
    7  * modification, are permitted provided that the following conditions
    8  * are met:
    9  * 1. Redistributions of source code must retain the above copyright
   10  *    notice, this list of conditions and the following disclaimer.
   11  * 2. Redistributions in binary form must reproduce the above copyright
   12  *    notice, this list of conditions and the following disclaimer in the
   13  *    documentation and/or other materials provided with the distribution.
   14  * 4. Neither the name of the University nor the names of its contributors
   15  *    may be used to endorse or promote products derived from this software
   16  *    without specific prior written permission.
   17  *
   18  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   19  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   20  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   21  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   22  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   23  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   24  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   25  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   26  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   27  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   28  * SUCH DAMAGE.
   29  *
   30  *      @(#)raw_usrreq.c        8.1 (Berkeley) 6/10/93
   31  * $FreeBSD: releng/8.0/sys/net/raw_usrreq.c 196019 2009-08-01 19:26:27Z rwatson $
   32  */
   33 
   34 #include <sys/param.h>
   35 #include <sys/kernel.h>
   36 #include <sys/lock.h>
   37 #include <sys/malloc.h>
   38 #include <sys/mbuf.h>
   39 #include <sys/mutex.h>
   40 #include <sys/priv.h>
   41 #include <sys/protosw.h>
   42 #include <sys/signalvar.h>
   43 #include <sys/socket.h>
   44 #include <sys/socketvar.h>
   45 #include <sys/sx.h>
   46 #include <sys/systm.h>
   47 
   48 #include <net/if.h>
   49 #include <net/raw_cb.h>
   50 #include <net/vnet.h>
   51 
   52 MTX_SYSINIT(rawcb_mtx, &rawcb_mtx, "rawcb", MTX_DEF);
   53 
   54 /*
   55  * Initialize raw connection block q.
   56  */
   57 void
   58 raw_init(void)
   59 {
   60 
   61         LIST_INIT(&V_rawcb_list);
   62 }
   63 
   64 /*
   65  * Raw protocol input routine.  Find the socket associated with the packet(s)
   66  * and move them over.  If nothing exists for this packet, drop it.
   67  */
   68 /*
   69  * Raw protocol interface.
   70  */
   71 void
   72 raw_input(struct mbuf *m0, struct sockproto *proto, struct sockaddr *src)
   73 {
   74         struct rawcb *rp;
   75         struct mbuf *m = m0;
   76         struct socket *last;
   77 
   78         last = 0;
   79         mtx_lock(&rawcb_mtx);
   80         LIST_FOREACH(rp, &V_rawcb_list, list) {
   81                 if (rp->rcb_proto.sp_family != proto->sp_family)
   82                         continue;
   83                 if (rp->rcb_proto.sp_protocol  &&
   84                     rp->rcb_proto.sp_protocol != proto->sp_protocol)
   85                         continue;
   86                 if (last) {
   87                         struct mbuf *n;
   88                         n = m_copy(m, 0, (int)M_COPYALL);
   89                         if (n) {
   90                                 if (sbappendaddr(&last->so_rcv, src,
   91                                     n, (struct mbuf *)0) == 0)
   92                                         /* should notify about lost packet */
   93                                         m_freem(n);
   94                                 else
   95                                         sorwakeup(last);
   96                         }
   97                 }
   98                 last = rp->rcb_socket;
   99         }
  100         if (last) {
  101                 if (sbappendaddr(&last->so_rcv, src,
  102                     m, (struct mbuf *)0) == 0)
  103                         m_freem(m);
  104                 else
  105                         sorwakeup(last);
  106         } else
  107                 m_freem(m);
  108         mtx_unlock(&rawcb_mtx);
  109 }
  110 
  111 /*ARGSUSED*/
  112 void
  113 raw_ctlinput(int cmd, struct sockaddr *arg, void *dummy)
  114 {
  115 
  116         if (cmd < 0 || cmd >= PRC_NCMDS)
  117                 return;
  118         /* INCOMPLETE */
  119 }
  120 
  121 static void
  122 raw_uabort(struct socket *so)
  123 {
  124 
  125         KASSERT(sotorawcb(so) != NULL, ("raw_uabort: rp == NULL"));
  126 
  127         soisdisconnected(so);
  128 }
  129 
  130 static void
  131 raw_uclose(struct socket *so)
  132 {
  133 
  134         KASSERT(sotorawcb(so) != NULL, ("raw_uabort: rp == NULL"));
  135 
  136         soisdisconnected(so);
  137 }
  138 
  139 /* pru_accept is EOPNOTSUPP */
  140 
  141 static int
  142 raw_uattach(struct socket *so, int proto, struct thread *td)
  143 {
  144         int error;
  145 
  146         /*
  147          * Implementors of raw sockets will already have allocated the PCB,
  148          * so it must be non-NULL here.
  149          */
  150         KASSERT(sotorawcb(so) != NULL, ("raw_uattach: so_pcb == NULL"));
  151 
  152         if (td != NULL) {
  153                 error = priv_check(td, PRIV_NET_RAW);
  154                 if (error)
  155                         return (error);
  156         }
  157         return (raw_attach(so, proto));
  158 }
  159 
  160 static int
  161 raw_ubind(struct socket *so, struct sockaddr *nam, struct thread *td)
  162 {
  163 
  164         return (EINVAL);
  165 }
  166 
  167 static int
  168 raw_uconnect(struct socket *so, struct sockaddr *nam, struct thread *td)
  169 {
  170 
  171         return (EINVAL);
  172 }
  173 
  174 /* pru_connect2 is EOPNOTSUPP */
  175 /* pru_control is EOPNOTSUPP */
  176 
  177 static void
  178 raw_udetach(struct socket *so)
  179 {
  180         struct rawcb *rp = sotorawcb(so);
  181 
  182         KASSERT(rp != NULL, ("raw_udetach: rp == NULL"));
  183 
  184         raw_detach(rp);
  185 }
  186 
  187 static int
  188 raw_udisconnect(struct socket *so)
  189 {
  190 
  191         KASSERT(sotorawcb(so) != NULL, ("raw_udisconnect: rp == NULL"));
  192 
  193         return (ENOTCONN);
  194 }
  195 
  196 /* pru_listen is EOPNOTSUPP */
  197 
  198 static int
  199 raw_upeeraddr(struct socket *so, struct sockaddr **nam)
  200 {
  201 
  202         KASSERT(sotorawcb(so) != NULL, ("raw_upeeraddr: rp == NULL"));
  203 
  204         return (ENOTCONN);
  205 }
  206 
  207 /* pru_rcvd is EOPNOTSUPP */
  208 /* pru_rcvoob is EOPNOTSUPP */
  209 
  210 static int
  211 raw_usend(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam,
  212     struct mbuf *control, struct thread *td)
  213 {
  214 
  215         KASSERT(sotorawcb(so) != NULL, ("raw_usend: rp == NULL"));
  216 
  217         if ((flags & PRUS_OOB) || (control && control->m_len)) {
  218                 /* XXXRW: Should control also be freed here? */
  219                 if (m != NULL)
  220                         m_freem(m);
  221                 return (EOPNOTSUPP);
  222         }
  223 
  224         /*
  225          * For historical (bad?) reasons, we effectively ignore the address
  226          * argument to sendto(2).  Perhaps we should return an error instead?
  227          */
  228         return ((*so->so_proto->pr_output)(m, so));
  229 }
  230 
  231 /* pru_sense is null */
  232 
  233 static int
  234 raw_ushutdown(struct socket *so)
  235 {
  236 
  237         KASSERT(sotorawcb(so) != NULL, ("raw_ushutdown: rp == NULL"));
  238 
  239         socantsendmore(so);
  240         return (0);
  241 }
  242 
  243 static int
  244 raw_usockaddr(struct socket *so, struct sockaddr **nam)
  245 {
  246 
  247         KASSERT(sotorawcb(so) != NULL, ("raw_usockaddr: rp == NULL"));
  248 
  249         return (EINVAL);
  250 }
  251 
  252 struct pr_usrreqs raw_usrreqs = {
  253         .pru_abort =            raw_uabort,
  254         .pru_attach =           raw_uattach,
  255         .pru_bind =             raw_ubind,
  256         .pru_connect =          raw_uconnect,
  257         .pru_detach =           raw_udetach, 
  258         .pru_disconnect =       raw_udisconnect,
  259         .pru_peeraddr =         raw_upeeraddr,
  260         .pru_send =             raw_usend,
  261         .pru_shutdown =         raw_ushutdown,
  262         .pru_sockaddr =         raw_usockaddr,
  263         .pru_close =            raw_uclose,
  264 };

Cache object: 2bf4ad62c8f9cb9856be08612d96ca85


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