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raw_cb.c revision 1.12 
      1 /*	$NetBSD: raw_cb.c,v 1.12 2001/11/12 23:49:47 lukem 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/cdefs.h>
     39 __KERNEL_RCSID(0, "$NetBSD: raw_cb.c,v 1.12 2001/11/12 23:49:47 lukem Exp $");
     40 
     41 #include <sys/param.h>
     42 #include <sys/systm.h>
     43 #include <sys/mbuf.h>
     44 #include <sys/socket.h>
     45 #include <sys/socketvar.h>
     46 #include <sys/domain.h>
     47 #include <sys/protosw.h>
     48 #include <sys/errno.h>
     49 
     50 #include <net/if.h>
     51 #include <net/route.h>
     52 #include <net/raw_cb.h>
     53 #include <netinet/in.h>
     54 
     55 /*
     56  * Routines to manage the raw protocol control blocks.
     57  *
     58  * TODO:
     59  *	hash lookups by protocol family/protocol + address family
     60  *	take care of unique address problems per AF?
     61  *	redo address binding to allow wildcards
     62  */
     63 
     64 u_long	raw_sendspace = RAWSNDQ;
     65 u_long	raw_recvspace = RAWRCVQ;
     66 
     67 /*
     68  * Allocate a control block and a nominal amount
     69  * of buffer space for the socket.
     70  */
     71 int
     72 raw_attach(so, proto)
     73 	struct socket *so;
     74 	int proto;
     75 {
     76 	struct rawcb *rp = sotorawcb(so);
     77 	int error;
     78 
     79 	/*
     80 	 * It is assumed that raw_attach is called
     81 	 * after space has been allocated for the
     82 	 * rawcb.
     83 	 */
     84 	if (rp == 0)
     85 		return (ENOBUFS);
     86 	if ((error = soreserve(so, raw_sendspace, raw_recvspace)) != 0)
     87 		return (error);
     88 	rp->rcb_socket = so;
     89 	rp->rcb_proto.sp_family = so->so_proto->pr_domain->dom_family;
     90 	rp->rcb_proto.sp_protocol = proto;
     91 	LIST_INSERT_HEAD(&rawcb, rp, rcb_list);
     92 	return (0);
     93 }
     94 
     95 /*
     96  * Detach the raw connection block and discard
     97  * socket resources.
     98  */
     99 void
    100 raw_detach(rp)
    101 	struct rawcb *rp;
    102 {
    103 	struct socket *so = rp->rcb_socket;
    104 
    105 	so->so_pcb = 0;
    106 	sofree(so);
    107 	LIST_REMOVE(rp, rcb_list);
    108 #ifdef notdef
    109 	if (rp->rcb_laddr)
    110 		m_freem(dtom(rp->rcb_laddr));
    111 	rp->rcb_laddr = 0;
    112 #endif
    113 	free((caddr_t)rp, M_PCB);
    114 }
    115 
    116 /*
    117  * Disconnect and possibly release resources.
    118  */
    119 void
    120 raw_disconnect(rp)
    121 	struct rawcb *rp;
    122 {
    123 
    124 #ifdef notdef
    125 	if (rp->rcb_faddr)
    126 		m_freem(dtom(rp->rcb_faddr));
    127 	rp->rcb_faddr = 0;
    128 #endif
    129 	if (rp->rcb_socket->so_state & SS_NOFDREF)
    130 		raw_detach(rp);
    131 }
    132