source: rtems/cpukit/libnetworking/net/raw_cb.c @ 320ffc35

/*
 * Copyright (c) 1980, 1986, 1993
 *      The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *      @(#)raw_cb.c    8.1 (Berkeley) 6/10/93
 * $FreeBSD: src/sys/net/raw_cb.c,v 1.34 2006/06/02 08:27:15 rwatson Exp $
 */

/*
 * $Id$
 */

#include <sys/param.h>
#include <rtems/bsd/sys/queue.h>
#include <sys/systm.h>
#include <sys/mbuf.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/domain.h>
#include <sys/protosw.h>
#include <sys/errno.h>

#include <net/if.h>
#include <net/route.h>
#include <net/raw_cb.h>
#include <netinet/in.h>

#ifdef __rtems__
#define mtx_lock(x)     /* UNUSED */
#define mtx_unlock(x)   /* UNUSED */
#define KASSERT(x,y)    /* UNUSED */
#endif

/*
 * Routines to manage the raw protocol control blocks.
 *
 * TODO:
 *      hash lookups by protocol family/protocol + address family
 *      take care of unique address problems per AF?
 *      redo address binding to allow wildcards
 */

struct rawcb_list_head rawcb_list;
static u_long   raw_sendspace = RAWSNDQ;
static u_long   raw_recvspace = RAWRCVQ;

/*
 * Allocate a control block and a nominal amount
 * of buffer space for the socket.
 */
int
raw_attach(struct socket *so, int proto)
{
        register struct rawcb *rp = sotorawcb(so);
        int error;

        /*
         * It is assumed that raw_attach is called
         * after space has been allocated for the
         * rawcb.
         */
        if (rp == 0)
                return (ENOBUFS);
        error = soreserve(so, raw_sendspace, raw_recvspace);
        if (error)
                return (error);
        rp->rcb_socket = so;
        rp->rcb_proto.sp_family = so->so_proto->pr_domain->dom_family;
        rp->rcb_proto.sp_protocol = proto;
        mtx_lock(&rawcb_mtx);
        LIST_INSERT_HEAD(&rawcb_list, rp, list);
        mtx_unlock(&rawcb_mtx);
        return (0);
}

/*
 * Detach the raw connection block and discard
 * socket resources.
 */
void
raw_detach(struct rawcb *rp)
{
        struct socket *so = rp->rcb_socket;

        KASSERT(so->so_pcb == rp, ("raw_detach: so_pcb != rp"));

        so->so_pcb = NULL;
        mtx_lock(&rawcb_mtx);
        LIST_REMOVE(rp, list);
        mtx_unlock(&rawcb_mtx);
#ifdef notdef
        if (rp->rcb_laddr)
                m_freem(dtom(rp->rcb_laddr));
        rp->rcb_laddr = 0;
#endif
        free((caddr_t)(rp), M_PCB);
}

/*
 * Disconnect raw socket.
 */
void
raw_disconnect(struct rawcb *rp)
{

#ifdef notdef
        if (rp->rcb_faddr)
                m_freem(dtom(rp->rcb_faddr));
        rp->rcb_faddr = 0;
#endif
}

#ifdef notdef
int
raw_bind(struct socket *so, struct mbuf *nam)
{
        struct sockaddr *addr = mtod(nam, struct sockaddr *);
        register struct rawcb *rp;

        if (ifnet == 0)
                return (EADDRNOTAVAIL);
        rp = sotorawcb(so);
        nam = m_copym(nam, 0, M_COPYALL, M_TRYWAIT);
        rp->rcb_laddr = mtod(nam, struct sockaddr *);
        return (0);
}
#endif