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/*-
* 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
* $FreeBSD$
*/
#include <sys/param.h>
#include <sys/domain.h>
#include <sys/lock.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/mutex.h>
#include <sys/protosw.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/sysctl.h>
#include <sys/systm.h>
#include <net/if.h>
#include <net/vnet.h>
#include <net/raw_cb.h>
/*
* 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 mtx rawcb_mtx;
VNET_DEFINE(struct rawcb_list_head, rawcb_list);
static SYSCTL_NODE(_net, OID_AUTO, raw, CTLFLAG_RW, 0,
"Raw socket infrastructure");
static u_long raw_sendspace = RAWSNDQ;
SYSCTL_ULONG(_net_raw, OID_AUTO, sendspace, CTLFLAG_RW, &raw_sendspace, 0,
"Default raw socket send space");
static u_long raw_recvspace = RAWRCVQ;
SYSCTL_ULONG(_net_raw, OID_AUTO, recvspace, CTLFLAG_RW, &raw_recvspace, 0,
"Default raw socket receive space");
/*
* Allocate a control block and a nominal amount of buffer space for the
* socket.
*/
int
raw_attach(struct socket *so, int proto)
{
struct rawcb *rp = sotorawcb(so);
int error;
/*
* It is assumed that raw_attach is called after space has been
* allocated for the rawcb; consumer protocols may simply allocate
* type struct rawcb, or a wrapper data structure that begins with a
* struct rawcb.
*/
KASSERT(rp != NULL, ("raw_attach: rp == NULL"));
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(&V_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);
free((caddr_t)(rp), M_PCB);
}
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