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51369649b0
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121 lines
3.8 KiB
C
121 lines
3.8 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 1980, 1986, 1993
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* The Regents of the University of California.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)raw_cb.c 8.1 (Berkeley) 6/10/93
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* $FreeBSD$
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*/
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#include <sys/param.h>
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#include <sys/domain.h>
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#include <sys/lock.h>
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#include <sys/kernel.h>
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#include <sys/malloc.h>
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#include <sys/mutex.h>
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#include <sys/protosw.h>
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#include <sys/socket.h>
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#include <sys/socketvar.h>
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#include <sys/sysctl.h>
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#include <sys/systm.h>
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#include <net/if.h>
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#include <net/vnet.h>
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#include <net/raw_cb.h>
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/*
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* Routines to manage the raw protocol control blocks.
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*
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* TODO:
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* hash lookups by protocol family/protocol + address family
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* take care of unique address problems per AF?
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* redo address binding to allow wildcards
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*/
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struct mtx rawcb_mtx;
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VNET_DEFINE(struct rawcb_list_head, rawcb_list);
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static SYSCTL_NODE(_net, OID_AUTO, raw, CTLFLAG_RW, 0,
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"Raw socket infrastructure");
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static u_long raw_sendspace = RAWSNDQ;
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SYSCTL_ULONG(_net_raw, OID_AUTO, sendspace, CTLFLAG_RW, &raw_sendspace, 0,
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"Default raw socket send space");
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static u_long raw_recvspace = RAWRCVQ;
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SYSCTL_ULONG(_net_raw, OID_AUTO, recvspace, CTLFLAG_RW, &raw_recvspace, 0,
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"Default raw socket receive space");
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/*
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* Allocate a control block and a nominal amount of buffer space for the
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* socket.
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*/
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int
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raw_attach(struct socket *so, int proto)
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{
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struct rawcb *rp = sotorawcb(so);
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int error;
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/*
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* It is assumed that raw_attach is called after space has been
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* allocated for the rawcb; consumer protocols may simply allocate
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* type struct rawcb, or a wrapper data structure that begins with a
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* struct rawcb.
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*/
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KASSERT(rp != NULL, ("raw_attach: rp == NULL"));
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error = soreserve(so, raw_sendspace, raw_recvspace);
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if (error)
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return (error);
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rp->rcb_socket = so;
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rp->rcb_proto.sp_family = so->so_proto->pr_domain->dom_family;
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rp->rcb_proto.sp_protocol = proto;
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mtx_lock(&rawcb_mtx);
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LIST_INSERT_HEAD(&V_rawcb_list, rp, list);
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mtx_unlock(&rawcb_mtx);
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return (0);
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}
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/*
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* Detach the raw connection block and discard socket resources.
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*/
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void
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raw_detach(struct rawcb *rp)
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{
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struct socket *so = rp->rcb_socket;
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KASSERT(so->so_pcb == rp, ("raw_detach: so_pcb != rp"));
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so->so_pcb = NULL;
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mtx_lock(&rawcb_mtx);
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LIST_REMOVE(rp, list);
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mtx_unlock(&rawcb_mtx);
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free((caddr_t)(rp), M_PCB);
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}
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