180 lines
5.7 KiB
C
180 lines
5.7 KiB
C
/*
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* Copyright (c) 2000-2012 Apple Inc. All rights reserved.
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*
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* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
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*
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* This file contains Original Code and/or Modifications of Original Code
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* as defined in and that are subject to the Apple Public Source License
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* Version 2.0 (the 'License'). You may not use this file except in
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* compliance with the License. The rights granted to you under the License
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* may not be used to create, or enable the creation or redistribution of,
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* unlawful or unlicensed copies of an Apple operating system, or to
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* circumvent, violate, or enable the circumvention or violation of, any
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* terms of an Apple operating system software license agreement.
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*
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* Please obtain a copy of the License at
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* http://www.opensource.apple.com/apsl/ and read it before using this file.
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*
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* The Original Code and all software distributed under the License are
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* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
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* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
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* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
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* Please see the License for the specific language governing rights and
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* limitations under the License.
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*
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* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
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*/
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/*
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* Copyright (c) 1980, 1986, 1993
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* The Regents of the University of California. 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. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. 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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*/
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#include <sys/param.h>
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#include <sys/malloc.h>
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#include <sys/socket.h>
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#include <sys/socketvar.h>
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#include <sys/domain.h>
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#include <sys/protosw.h>
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#include <kern/locks.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 rawcb_list_head rawcb_list = LIST_HEAD_INITIALIZER(rawcb_list);
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static uint32_t raw_sendspace = RAWSNDQ;
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static uint32_t raw_recvspace = RAWRCVQ;
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extern lck_mtx_t raw_mtx; /*### global raw cb mutex for now */
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/*
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* Allocate a control block and a nominal amount
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* of buffer space for the 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
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* after space has been allocated for the
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* rawcb.
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*/
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if (rp == 0) {
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return ENOBUFS;
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}
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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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}
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rp->rcb_socket = so;
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rp->rcb_proto.sp_family = (uint16_t)SOCK_DOM(so);
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rp->rcb_proto.sp_protocol = (uint16_t)proto;
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lck_mtx_lock(&raw_mtx);
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LIST_INSERT_HEAD(&rawcb_list, rp, list);
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lck_mtx_unlock(&raw_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
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* socket resources.
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*/
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void
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raw_detach_nofree(struct rawcb *rp)
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{
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struct socket *so = rp->rcb_socket;
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so->so_pcb = 0;
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so->so_flags |= SOF_PCBCLEARING;
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sofree(so);
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if (!lck_mtx_try_lock(&raw_mtx)) {
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socket_unlock(so, 0);
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lck_mtx_lock(&raw_mtx);
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socket_lock(so, 0);
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}
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LIST_REMOVE(rp, list);
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lck_mtx_unlock(&raw_mtx);
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rp->rcb_socket = NULL;
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}
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/*
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* Disconnect and possibly release resources.
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*/
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void
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raw_disconnect(struct rawcb *rp)
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{
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struct socket *so = rp->rcb_socket;
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/*
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* A multipath subflow socket would have its SS_NOFDREF set by default,
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* so check for SOF_MP_SUBFLOW socket flag before detaching the PCB;
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* when the socket is closed for real, SOF_MP_SUBFLOW would be cleared.
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*/
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if (!(so->so_flags & SOF_MP_SUBFLOW) && (so->so_state & SS_NOFDREF)) {
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raw_detach_nofree(rp);
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kfree_type(struct rawcb, rp);
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}
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}
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#ifdef notdef
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#include <sys/mbuf.h>
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int
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raw_bind(struct socket *so, struct mbuf *nam)
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{
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struct sockaddr *addr = mtod(nam, struct sockaddr *);
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struct rawcb *rp;
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if (ifnet == 0) {
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return EADDRNOTAVAIL;
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}
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rp = sotorawcb(so);
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nam = m_copym(nam, 0, M_COPYALL, M_WAITOK);
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if (nam == NULL) {
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return ENOBUFS;
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}
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rp->rcb_laddr = mtod(nam, struct sockaddr *);
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return 0;
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}
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#endif
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