Home | History | Annotate | Line # | Download | only in net
raw_cb.c revision 1.8 
      1 /*	$NetBSD: raw_cb.c,v 1.8 1995/06/12 00:46:53 mycroft Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1980, 1986, 1993
      5  *	The Regents of the University of California.  All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. All advertising materials mentioning features or use of this software
     16  *    must display the following acknowledgement:
     17  *	This product includes software developed by the University of
     18  *	California, Berkeley and its contributors.
     19  * 4. Neither the name of the University nor the names of its contributors
     20  *    may be used to endorse or promote products derived from this software
     21  *    without specific prior written permission.
     22  *
     23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     33  * SUCH DAMAGE.
     34  *
     35  *	@(#)raw_cb.c	8.1 (Berkeley) 6/10/93
     36  */
     37 
     38 #include <sys/param.h>
     39 #include <sys/systm.h>
     40 #include <sys/mbuf.h>
     41 #include <sys/socket.h>
     42 #include <sys/socketvar.h>
     43 #include <sys/domain.h>
     44 #include <sys/protosw.h>
     45 #include <sys/errno.h>
     46 
     47 #include <net/if.h>
     48 #include <net/route.h>
     49 #include <net/raw_cb.h>
     50 #include <netinet/in.h>
     51 
     52 /*
     53  * Routines to manage the raw protocol control blocks.
     54  *
     55  * TODO:
     56  *	hash lookups by protocol family/protocol + address family
     57  *	take care of unique address problems per AF?
     58  *	redo address binding to allow wildcards
     59  */
     60 
     61 u_long	raw_sendspace = RAWSNDQ;
     62 u_long	raw_recvspace = RAWRCVQ;
     63 
     64 /*
     65  * Allocate a control block and a nominal amount
     66  * of buffer space for the socket.
     67  */
     68 int
     69 raw_attach(so, proto)
     70 	register struct socket *so;
     71 	int proto;
     72 {
     73 	register struct rawcb *rp = sotorawcb(so);
     74 	int error;
     75 
     76 	/*
     77 	 * It is assumed that raw_attach is called
     78 	 * after space has been allocated for the
     79 	 * rawcb.
     80 	 */
     81 	if (rp == 0)
     82 		return (ENOBUFS);
     83 	if (error = soreserve(so, raw_sendspace, raw_recvspace))
     84 		return (error);
     85 	rp->rcb_socket = so;
     86 	rp->rcb_proto.sp_family = so->so_proto->pr_domain->dom_family;
     87 	rp->rcb_proto.sp_protocol = proto;
     88 	LIST_INSERT_HEAD(&rawcb, rp, rcb_list);
     89 	return (0);
     90 }
     91 
     92 /*
     93  * Detach the raw connection block and discard
     94  * socket resources.
     95  */
     96 void
     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 	LIST_REMOVE(rp, rcb_list);
    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 void
    117 raw_disconnect(rp)
    118 	struct rawcb *rp;
    119 {
    120 
    121 #ifdef notdef
    122 	if (rp->rcb_faddr)
    123 		m_freem(dtom(rp->rcb_faddr));
    124 	rp->rcb_faddr = 0;
    125 #endif
    126 	if (rp->rcb_socket->so_state & SS_NOFDREF)
    127 		raw_detach(rp);
    128 }
    129 
    130 #ifdef notdef
    131 int
    132 raw_bind(so, nam)
    133 	register struct socket *so;
    134 	struct mbuf *nam;
    135 {
    136 	struct sockaddr *addr = mtod(nam, struct sockaddr *);
    137 	register struct rawcb *rp;
    138 
    139 	if (ifnet == 0)
    140 		return (EADDRNOTAVAIL);
    141 	rp = sotorawcb(so);
    142 	nam = m_copym(nam, 0, M_COPYALL, M_WAITOK);
    143 	rp->rcb_laddr = mtod(nam, struct sockaddr *);
    144 	return (0);
    145 }
    146 #endif
    147