5479e5d692
rather than an error. Detaches do not "fail", they other occur or the protocol flags SS_PROTOREF to take ownership of the socket. soclose() no longer looks at so_pcb to see if it's NULL, relying entirely on the protocol to decide whether it's time to free the socket or not using SS_PROTOREF. so_pcb is now entirely owned and managed by the protocol code. Likewise, no longer test so_pcb in other socket functions, such as soreceive(), which have no business digging into protocol internals. Protocol detach routines no longer try to free the socket on detach, this is performed in the socket code if the protocol permits it. In rts_detach(), no longer test for rp != NULL in detach, and likewise in other protocols that don't permit a NULL so_pcb, reduce the incidence of testing for it during detach. netinet and netinet6 are not fully updated to this change, which will be in an upcoming commit. In their current state they may leak memory or panic. MFC after: 3 months
151 lines
3.9 KiB
C
151 lines
3.9 KiB
C
/*-
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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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* 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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* $FreeBSD$
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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/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/systm.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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struct rawcb_list_head rawcb_list;
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const static u_long raw_sendspace = RAWSNDQ;
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const static u_long raw_recvspace = RAWRCVQ;
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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(so, proto)
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register struct socket *so;
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int proto;
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{
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register 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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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(&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
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* socket resources.
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*/
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void
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raw_detach(rp)
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register 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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#ifdef notdef
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if (rp->rcb_laddr)
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m_freem(dtom(rp->rcb_laddr));
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rp->rcb_laddr = 0;
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#endif
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free((caddr_t)(rp), M_PCB);
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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(rp)
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struct rawcb *rp;
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{
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#ifdef notdef
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if (rp->rcb_faddr)
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m_freem(dtom(rp->rcb_faddr));
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rp->rcb_faddr = 0;
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#endif
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if (rp->rcb_socket->so_state & SS_NOFDREF)
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raw_detach(rp);
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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(so, nam)
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register struct socket *so;
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struct mbuf *nam;
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{
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struct sockaddr *addr = mtod(nam, struct sockaddr *);
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register struct rawcb *rp;
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if (ifnet == 0)
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return (EADDRNOTAVAIL);
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rp = sotorawcb(so);
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nam = m_copym(nam, 0, M_COPYALL, M_TRYWAIT);
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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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