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raw_cb.c revision 1.4 
      1 /*
      2  * Copyright (c) 1980, 1986 Regents of the University of California.
      3  * 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  *	from: @(#)raw_cb.c	7.11 (Berkeley) 6/28/90
     34  *	$Id: raw_cb.c,v 1.4 1993/12/18 00:41:00 mycroft Exp $
     35  */
     36 
     37 #include <sys/param.h>
     38 #include <sys/systm.h>
     39 #include <sys/mbuf.h>
     40 #include <sys/socket.h>
     41 #include <sys/socketvar.h>
     42 #include <sys/domain.h>
     43 #include <sys/protosw.h>
     44 #include <sys/errno.h>
     45 
     46 #include <net/if.h>
     47 #include <net/route.h>
     48 #include <net/raw_cb.h>
     49 
     50 #include <netinet/in.h>
     51 
     52 #include <machine/mtpr.h>
     53 
     54 /*
     55  * Routines to manage the raw protocol control blocks.
     56  *
     57  * TODO:
     58  *	hash lookups by protocol family/protocol + address family
     59  *	take care of unique address problems per AF?
     60  *	redo address binding to allow wildcards
     61  */
     62 
     63 u_long	raw_sendspace = RAWSNDQ;
     64 u_long	raw_recvspace = RAWRCVQ;
     65 
     66 /*
     67  * Allocate a control block and a nominal amount
     68  * of buffer space for the socket.
     69  */
     70 raw_attach(so, proto)
     71 	register struct socket *so;
     72 	int proto;
     73 {
     74 	register struct rawcb *rp = sotorawcb(so);
     75 	int error;
     76 
     77 	/*
     78 	 * It is assumed that raw_attach is called
     79 	 * after space has been allocated for the
     80 	 * rawcb.
     81 	 */
     82 	if (rp == 0)
     83 		return (ENOBUFS);
     84 	if (error = soreserve(so, raw_sendspace, raw_recvspace))
     85 		return (error);
     86 	rp->rcb_socket = so;
     87 	rp->rcb_proto.sp_family = so->so_proto->pr_domain->dom_family;
     88 	rp->rcb_proto.sp_protocol = proto;
     89 	insque(rp, &rawcb);
     90 	return (0);
     91 }
     92 
     93 /*
     94  * Detach the raw connection block and discard
     95  * socket resources.
     96  */
     97 raw_detach(rp)
     98 	register struct rawcb *rp;
     99 {
    100 	struct socket *so = rp->rcb_socket;
    101 
    102 	so->so_pcb = 0;
    103 	sofree(so);
    104 	remque(rp);
    105 #ifdef notdef
    106 	if (rp->rcb_laddr)
    107 		m_freem(dtom(rp->rcb_laddr));
    108 	rp->rcb_laddr = 0;
    109 #endif
    110 	free((caddr_t)(rp), M_PCB);
    111 }
    112 
    113 /*
    114  * Disconnect and possibly release resources.
    115  */
    116 raw_disconnect(rp)
    117 	struct rawcb *rp;
    118 {
    119 
    120 #ifdef notdef
    121 	if (rp->rcb_faddr)
    122 		m_freem(dtom(rp->rcb_faddr));
    123 	rp->rcb_faddr = 0;
    124 #endif
    125 	if (rp->rcb_socket->so_state & SS_NOFDREF)
    126 		raw_detach(rp);
    127 }
    128 
    129 #ifdef notdef
    130 raw_bind(so, nam)
    131 	register struct socket *so;
    132 	struct mbuf *nam;
    133 {
    134 	struct sockaddr *addr = mtod(nam, struct sockaddr *);
    135 	register struct rawcb *rp;
    136 
    137 	if (ifnet == 0)
    138 		return (EADDRNOTAVAIL);
    139 	rp = sotorawcb(so);
    140 	nam = m_copym(nam, 0, M_COPYALL, M_WAITOK);
    141 	rp->rcb_laddr = mtod(nam, struct sockaddr *);
    142 	return (0);
    143 }
    144 #endif
    145