911 lines
23 KiB
C
911 lines
23 KiB
C
/*
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* Copyright (c) 1982, 1986, 1988, 1990, 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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* @(#)uipc_socket2.c 8.1 (Berkeley) 6/10/93
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* $Id: uipc_socket2.c,v 1.13 1996/08/19 19:22:26 julian Exp $
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/proc.h>
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#include <sys/file.h>
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#include <sys/buf.h>
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#include <sys/malloc.h>
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#include <sys/mbuf.h>
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#include <sys/protosw.h>
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#include <sys/stat.h>
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#include <sys/socket.h>
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#include <sys/socketvar.h>
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#include <sys/signalvar.h>
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#include <sys/sysctl.h>
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/*
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* Primitive routines for operating on sockets and socket buffers
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*/
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u_long sb_max = SB_MAX; /* XXX should be static */
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SYSCTL_INT(_kern, KERN_MAXSOCKBUF, maxsockbuf, CTLFLAG_RW, &sb_max, 0, "")
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static u_long sb_efficiency = 8; /* parameter for sbreserve() */
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SYSCTL_INT(_kern, OID_AUTO, sockbuf_waste_factor, CTLFLAG_RW, &sb_efficiency,
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0, "");
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static int sominqueue = 0;
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SYSCTL_INT(_kern, KERN_SOMINQUEUE, sominqueue, CTLFLAG_RW, &sominqueue, 0, "");
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/*
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* Procedures to manipulate state flags of socket
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* and do appropriate wakeups. Normal sequence from the
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* active (originating) side is that soisconnecting() is
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* called during processing of connect() call,
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* resulting in an eventual call to soisconnected() if/when the
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* connection is established. When the connection is torn down
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* soisdisconnecting() is called during processing of disconnect() call,
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* and soisdisconnected() is called when the connection to the peer
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* is totally severed. The semantics of these routines are such that
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* connectionless protocols can call soisconnected() and soisdisconnected()
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* only, bypassing the in-progress calls when setting up a ``connection''
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* takes no time.
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*
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* From the passive side, a socket is created with
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* two queues of sockets: so_q0 for connections in progress
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* and so_q for connections already made and awaiting user acceptance.
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* As a protocol is preparing incoming connections, it creates a socket
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* structure queued on so_q0 by calling sonewconn(). When the connection
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* is established, soisconnected() is called, and transfers the
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* socket structure to so_q, making it available to accept().
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*
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* If a socket is closed with sockets on either
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* so_q0 or so_q, these sockets are dropped.
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*
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* If higher level protocols are implemented in
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* the kernel, the wakeups done here will sometimes
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* cause software-interrupt process scheduling.
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*/
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void
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soisconnecting(so)
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register struct socket *so;
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{
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so->so_state &= ~(SS_ISCONNECTED|SS_ISDISCONNECTING);
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so->so_state |= SS_ISCONNECTING;
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}
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void
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soisconnected(so)
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register struct socket *so;
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{
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register struct socket *head = so->so_head;
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so->so_state &= ~(SS_ISCONNECTING|SS_ISDISCONNECTING|SS_ISCONFIRMING);
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so->so_state |= SS_ISCONNECTED;
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if (head && (so->so_state & SS_INCOMP)) {
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TAILQ_REMOVE(&head->so_incomp, so, so_list);
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so->so_state &= ~SS_INCOMP;
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TAILQ_INSERT_TAIL(&head->so_comp, so, so_list);
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so->so_state |= SS_COMP;
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sorwakeup(head);
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wakeup((caddr_t)&head->so_timeo);
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} else {
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wakeup((caddr_t)&so->so_timeo);
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sorwakeup(so);
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sowwakeup(so);
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}
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}
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void
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soisdisconnecting(so)
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register struct socket *so;
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{
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so->so_state &= ~SS_ISCONNECTING;
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so->so_state |= (SS_ISDISCONNECTING|SS_CANTRCVMORE|SS_CANTSENDMORE);
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wakeup((caddr_t)&so->so_timeo);
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sowwakeup(so);
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sorwakeup(so);
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}
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void
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soisdisconnected(so)
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register struct socket *so;
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{
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so->so_state &= ~(SS_ISCONNECTING|SS_ISCONNECTED|SS_ISDISCONNECTING);
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so->so_state |= (SS_CANTRCVMORE|SS_CANTSENDMORE);
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wakeup((caddr_t)&so->so_timeo);
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sowwakeup(so);
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sorwakeup(so);
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}
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/*
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* When an attempt at a new connection is noted on a socket
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* which accepts connections, sonewconn is called. If the
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* connection is possible (subject to space constraints, etc.)
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* then we allocate a new structure, propoerly linked into the
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* data structure of the original socket, and return this.
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* Connstatus may be 0, or SO_ISCONFIRMING, or SO_ISCONNECTED.
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*
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* Currently, sonewconn() is defined as sonewconn1() in socketvar.h
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* to catch calls that are missing the (new) second parameter.
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*/
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struct socket *
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sonewconn1(head, connstatus)
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register struct socket *head;
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int connstatus;
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{
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register struct socket *so;
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if ((head->so_qlen > 3 * head->so_qlimit / 2) &&
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(head->so_qlen > sominqueue))
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return ((struct socket *)0);
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MALLOC(so, struct socket *, sizeof(*so), M_SOCKET, M_DONTWAIT);
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if (so == NULL)
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return ((struct socket *)0);
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bzero((caddr_t)so, sizeof(*so));
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so->so_head = head;
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so->so_type = head->so_type;
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so->so_options = head->so_options &~ SO_ACCEPTCONN;
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so->so_linger = head->so_linger;
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so->so_state = head->so_state | SS_NOFDREF;
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so->so_proto = head->so_proto;
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so->so_timeo = head->so_timeo;
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so->so_pgid = head->so_pgid;
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(void) soreserve(so, head->so_snd.sb_hiwat, head->so_rcv.sb_hiwat);
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if (connstatus) {
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TAILQ_INSERT_TAIL(&head->so_comp, so, so_list);
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so->so_state |= SS_COMP;
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} else {
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TAILQ_INSERT_TAIL(&head->so_incomp, so, so_list);
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so->so_state |= SS_INCOMP;
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}
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head->so_qlen++;
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if ((*so->so_proto->pr_usrreqs->pru_attach)(so, 0)) {
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if (so->so_state & SS_COMP) {
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TAILQ_REMOVE(&head->so_comp, so, so_list);
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} else {
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TAILQ_REMOVE(&head->so_incomp, so, so_list);
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}
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head->so_qlen--;
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(void) free((caddr_t)so, M_SOCKET);
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return ((struct socket *)0);
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}
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if (connstatus) {
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sorwakeup(head);
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wakeup((caddr_t)&head->so_timeo);
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so->so_state |= connstatus;
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}
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return (so);
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}
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/*
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* Socantsendmore indicates that no more data will be sent on the
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* socket; it would normally be applied to a socket when the user
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* informs the system that no more data is to be sent, by the protocol
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* code (in case PRU_SHUTDOWN). Socantrcvmore indicates that no more data
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* will be received, and will normally be applied to the socket by a
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* protocol when it detects that the peer will send no more data.
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* Data queued for reading in the socket may yet be read.
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*/
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void
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socantsendmore(so)
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struct socket *so;
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{
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so->so_state |= SS_CANTSENDMORE;
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sowwakeup(so);
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}
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void
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socantrcvmore(so)
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struct socket *so;
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{
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so->so_state |= SS_CANTRCVMORE;
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sorwakeup(so);
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}
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/*
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* Wait for data to arrive at/drain from a socket buffer.
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*/
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int
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sbwait(sb)
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struct sockbuf *sb;
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{
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sb->sb_flags |= SB_WAIT;
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return (tsleep((caddr_t)&sb->sb_cc,
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(sb->sb_flags & SB_NOINTR) ? PSOCK : PSOCK | PCATCH, "sbwait",
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sb->sb_timeo));
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}
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/*
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* Lock a sockbuf already known to be locked;
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* return any error returned from sleep (EINTR).
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*/
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int
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sb_lock(sb)
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register struct sockbuf *sb;
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{
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int error;
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while (sb->sb_flags & SB_LOCK) {
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sb->sb_flags |= SB_WANT;
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error = tsleep((caddr_t)&sb->sb_flags,
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(sb->sb_flags & SB_NOINTR) ? PSOCK : PSOCK|PCATCH,
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"sblock", 0);
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if (error)
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return (error);
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}
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sb->sb_flags |= SB_LOCK;
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return (0);
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}
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/*
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* Wakeup processes waiting on a socket buffer.
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* Do asynchronous notification via SIGIO
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* if the socket has the SS_ASYNC flag set.
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*/
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void
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sowakeup(so, sb)
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register struct socket *so;
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register struct sockbuf *sb;
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{
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struct proc *p;
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selwakeup(&sb->sb_sel);
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sb->sb_flags &= ~SB_SEL;
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if (sb->sb_flags & SB_WAIT) {
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sb->sb_flags &= ~SB_WAIT;
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wakeup((caddr_t)&sb->sb_cc);
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}
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if (so->so_state & SS_ASYNC) {
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if (so->so_pgid < 0)
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gsignal(-so->so_pgid, SIGIO);
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else if (so->so_pgid > 0 && (p = pfind(so->so_pgid)) != 0)
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psignal(p, SIGIO);
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}
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}
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/*
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* Socket buffer (struct sockbuf) utility routines.
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*
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* Each socket contains two socket buffers: one for sending data and
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* one for receiving data. Each buffer contains a queue of mbufs,
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* information about the number of mbufs and amount of data in the
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* queue, and other fields allowing select() statements and notification
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* on data availability to be implemented.
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*
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* Data stored in a socket buffer is maintained as a list of records.
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* Each record is a list of mbufs chained together with the m_next
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* field. Records are chained together with the m_nextpkt field. The upper
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* level routine soreceive() expects the following conventions to be
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* observed when placing information in the receive buffer:
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*
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* 1. If the protocol requires each message be preceded by the sender's
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* name, then a record containing that name must be present before
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* any associated data (mbuf's must be of type MT_SONAME).
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* 2. If the protocol supports the exchange of ``access rights'' (really
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* just additional data associated with the message), and there are
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* ``rights'' to be received, then a record containing this data
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* should be present (mbuf's must be of type MT_RIGHTS).
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* 3. If a name or rights record exists, then it must be followed by
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* a data record, perhaps of zero length.
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*
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* Before using a new socket structure it is first necessary to reserve
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* buffer space to the socket, by calling sbreserve(). This should commit
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* some of the available buffer space in the system buffer pool for the
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* socket (currently, it does nothing but enforce limits). The space
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* should be released by calling sbrelease() when the socket is destroyed.
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*/
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int
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soreserve(so, sndcc, rcvcc)
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register struct socket *so;
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u_long sndcc, rcvcc;
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{
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if (sbreserve(&so->so_snd, sndcc) == 0)
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goto bad;
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if (sbreserve(&so->so_rcv, rcvcc) == 0)
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goto bad2;
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if (so->so_rcv.sb_lowat == 0)
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so->so_rcv.sb_lowat = 1;
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if (so->so_snd.sb_lowat == 0)
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so->so_snd.sb_lowat = MCLBYTES;
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if (so->so_snd.sb_lowat > so->so_snd.sb_hiwat)
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so->so_snd.sb_lowat = so->so_snd.sb_hiwat;
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return (0);
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bad2:
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sbrelease(&so->so_snd);
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bad:
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return (ENOBUFS);
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}
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/*
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* Allot mbufs to a sockbuf.
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* Attempt to scale mbmax so that mbcnt doesn't become limiting
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* if buffering efficiency is near the normal case.
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*/
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int
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sbreserve(sb, cc)
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struct sockbuf *sb;
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u_long cc;
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{
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if (cc > sb_max * MCLBYTES / (MSIZE + MCLBYTES))
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return (0);
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sb->sb_hiwat = cc;
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sb->sb_mbmax = min(cc * sb_efficiency, sb_max);
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if (sb->sb_lowat > sb->sb_hiwat)
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sb->sb_lowat = sb->sb_hiwat;
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return (1);
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}
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/*
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* Free mbufs held by a socket, and reserved mbuf space.
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*/
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void
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sbrelease(sb)
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struct sockbuf *sb;
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{
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sbflush(sb);
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sb->sb_hiwat = sb->sb_mbmax = 0;
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}
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/*
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* Routines to add and remove
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* data from an mbuf queue.
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*
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* The routines sbappend() or sbappendrecord() are normally called to
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* append new mbufs to a socket buffer, after checking that adequate
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* space is available, comparing the function sbspace() with the amount
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* of data to be added. sbappendrecord() differs from sbappend() in
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* that data supplied is treated as the beginning of a new record.
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* To place a sender's address, optional access rights, and data in a
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* socket receive buffer, sbappendaddr() should be used. To place
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* access rights and data in a socket receive buffer, sbappendrights()
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* should be used. In either case, the new data begins a new record.
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* Note that unlike sbappend() and sbappendrecord(), these routines check
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* for the caller that there will be enough space to store the data.
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* Each fails if there is not enough space, or if it cannot find mbufs
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* to store additional information in.
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*
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* Reliable protocols may use the socket send buffer to hold data
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* awaiting acknowledgement. Data is normally copied from a socket
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* send buffer in a protocol with m_copy for output to a peer,
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* and then removing the data from the socket buffer with sbdrop()
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* or sbdroprecord() when the data is acknowledged by the peer.
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*/
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/*
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* Append mbuf chain m to the last record in the
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* socket buffer sb. The additional space associated
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* the mbuf chain is recorded in sb. Empty mbufs are
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* discarded and mbufs are compacted where possible.
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*/
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void
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sbappend(sb, m)
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struct sockbuf *sb;
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struct mbuf *m;
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{
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register struct mbuf *n;
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if (m == 0)
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return;
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n = sb->sb_mb;
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if (n) {
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while (n->m_nextpkt)
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n = n->m_nextpkt;
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do {
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if (n->m_flags & M_EOR) {
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sbappendrecord(sb, m); /* XXXXXX!!!! */
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return;
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}
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} while (n->m_next && (n = n->m_next));
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}
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sbcompress(sb, m, n);
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}
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#ifdef SOCKBUF_DEBUG
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void
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sbcheck(sb)
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register struct sockbuf *sb;
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{
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register struct mbuf *m;
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register int len = 0, mbcnt = 0;
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for (m = sb->sb_mb; m; m = m->m_next) {
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len += m->m_len;
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mbcnt += MSIZE;
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if (m->m_flags & M_EXT) /*XXX*/ /* pretty sure this is bogus */
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mbcnt += m->m_ext.ext_size;
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if (m->m_nextpkt)
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panic("sbcheck nextpkt");
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}
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if (len != sb->sb_cc || mbcnt != sb->sb_mbcnt) {
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printf("cc %d != %d || mbcnt %d != %d\n", len, sb->sb_cc,
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mbcnt, sb->sb_mbcnt);
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panic("sbcheck");
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}
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}
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#endif
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/*
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* As above, except the mbuf chain
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* begins a new record.
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*/
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void
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sbappendrecord(sb, m0)
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register struct sockbuf *sb;
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register struct mbuf *m0;
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{
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register struct mbuf *m;
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if (m0 == 0)
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return;
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m = sb->sb_mb;
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if (m)
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while (m->m_nextpkt)
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m = m->m_nextpkt;
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/*
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* Put the first mbuf on the queue.
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* Note this permits zero length records.
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*/
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sballoc(sb, m0);
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if (m)
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m->m_nextpkt = m0;
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else
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sb->sb_mb = m0;
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m = m0->m_next;
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m0->m_next = 0;
|
|
if (m && (m0->m_flags & M_EOR)) {
|
|
m0->m_flags &= ~M_EOR;
|
|
m->m_flags |= M_EOR;
|
|
}
|
|
sbcompress(sb, m, m0);
|
|
}
|
|
|
|
/*
|
|
* As above except that OOB data
|
|
* is inserted at the beginning of the sockbuf,
|
|
* but after any other OOB data.
|
|
*/
|
|
void
|
|
sbinsertoob(sb, m0)
|
|
register struct sockbuf *sb;
|
|
register struct mbuf *m0;
|
|
{
|
|
register struct mbuf *m;
|
|
register struct mbuf **mp;
|
|
|
|
if (m0 == 0)
|
|
return;
|
|
for (mp = &sb->sb_mb; *mp ; mp = &((*mp)->m_nextpkt)) {
|
|
m = *mp;
|
|
again:
|
|
switch (m->m_type) {
|
|
|
|
case MT_OOBDATA:
|
|
continue; /* WANT next train */
|
|
|
|
case MT_CONTROL:
|
|
m = m->m_next;
|
|
if (m)
|
|
goto again; /* inspect THIS train further */
|
|
}
|
|
break;
|
|
}
|
|
/*
|
|
* Put the first mbuf on the queue.
|
|
* Note this permits zero length records.
|
|
*/
|
|
sballoc(sb, m0);
|
|
m0->m_nextpkt = *mp;
|
|
*mp = m0;
|
|
m = m0->m_next;
|
|
m0->m_next = 0;
|
|
if (m && (m0->m_flags & M_EOR)) {
|
|
m0->m_flags &= ~M_EOR;
|
|
m->m_flags |= M_EOR;
|
|
}
|
|
sbcompress(sb, m, m0);
|
|
}
|
|
|
|
/*
|
|
* Append address and data, and optionally, control (ancillary) data
|
|
* to the receive queue of a socket. If present,
|
|
* m0 must include a packet header with total length.
|
|
* Returns 0 if no space in sockbuf or insufficient mbufs.
|
|
*/
|
|
int
|
|
sbappendaddr(sb, asa, m0, control)
|
|
register struct sockbuf *sb;
|
|
struct sockaddr *asa;
|
|
struct mbuf *m0, *control;
|
|
{
|
|
register struct mbuf *m, *n;
|
|
int space = asa->sa_len;
|
|
|
|
if (m0 && (m0->m_flags & M_PKTHDR) == 0)
|
|
panic("sbappendaddr");
|
|
if (m0)
|
|
space += m0->m_pkthdr.len;
|
|
for (n = control; n; n = n->m_next) {
|
|
space += n->m_len;
|
|
if (n->m_next == 0) /* keep pointer to last control buf */
|
|
break;
|
|
}
|
|
if (space > sbspace(sb))
|
|
return (0);
|
|
if (asa->sa_len > MLEN)
|
|
return (0);
|
|
MGET(m, M_DONTWAIT, MT_SONAME);
|
|
if (m == 0)
|
|
return (0);
|
|
m->m_len = asa->sa_len;
|
|
bcopy((caddr_t)asa, mtod(m, caddr_t), asa->sa_len);
|
|
if (n)
|
|
n->m_next = m0; /* concatenate data to control */
|
|
else
|
|
control = m0;
|
|
m->m_next = control;
|
|
for (n = m; n; n = n->m_next)
|
|
sballoc(sb, n);
|
|
n = sb->sb_mb;
|
|
if (n) {
|
|
while (n->m_nextpkt)
|
|
n = n->m_nextpkt;
|
|
n->m_nextpkt = m;
|
|
} else
|
|
sb->sb_mb = m;
|
|
return (1);
|
|
}
|
|
|
|
int
|
|
sbappendcontrol(sb, m0, control)
|
|
struct sockbuf *sb;
|
|
struct mbuf *control, *m0;
|
|
{
|
|
register struct mbuf *m, *n;
|
|
int space = 0;
|
|
|
|
if (control == 0)
|
|
panic("sbappendcontrol");
|
|
for (m = control; ; m = m->m_next) {
|
|
space += m->m_len;
|
|
if (m->m_next == 0)
|
|
break;
|
|
}
|
|
n = m; /* save pointer to last control buffer */
|
|
for (m = m0; m; m = m->m_next)
|
|
space += m->m_len;
|
|
if (space > sbspace(sb))
|
|
return (0);
|
|
n->m_next = m0; /* concatenate data to control */
|
|
for (m = control; m; m = m->m_next)
|
|
sballoc(sb, m);
|
|
n = sb->sb_mb;
|
|
if (n) {
|
|
while (n->m_nextpkt)
|
|
n = n->m_nextpkt;
|
|
n->m_nextpkt = control;
|
|
} else
|
|
sb->sb_mb = control;
|
|
return (1);
|
|
}
|
|
|
|
/*
|
|
* Compress mbuf chain m into the socket
|
|
* buffer sb following mbuf n. If n
|
|
* is null, the buffer is presumed empty.
|
|
*/
|
|
void
|
|
sbcompress(sb, m, n)
|
|
register struct sockbuf *sb;
|
|
register struct mbuf *m, *n;
|
|
{
|
|
register int eor = 0;
|
|
register struct mbuf *o;
|
|
|
|
while (m) {
|
|
eor |= m->m_flags & M_EOR;
|
|
if (m->m_len == 0 &&
|
|
(eor == 0 ||
|
|
(((o = m->m_next) || (o = n)) &&
|
|
o->m_type == m->m_type))) {
|
|
m = m_free(m);
|
|
continue;
|
|
}
|
|
if (n && (n->m_flags & (M_EXT | M_EOR)) == 0 &&
|
|
(n->m_data + n->m_len + m->m_len) < &n->m_dat[MLEN] &&
|
|
n->m_type == m->m_type) {
|
|
bcopy(mtod(m, caddr_t), mtod(n, caddr_t) + n->m_len,
|
|
(unsigned)m->m_len);
|
|
n->m_len += m->m_len;
|
|
sb->sb_cc += m->m_len;
|
|
m = m_free(m);
|
|
continue;
|
|
}
|
|
if (n)
|
|
n->m_next = m;
|
|
else
|
|
sb->sb_mb = m;
|
|
sballoc(sb, m);
|
|
n = m;
|
|
m->m_flags &= ~M_EOR;
|
|
m = m->m_next;
|
|
n->m_next = 0;
|
|
}
|
|
if (eor) {
|
|
if (n)
|
|
n->m_flags |= eor;
|
|
else
|
|
printf("semi-panic: sbcompress\n");
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Free all mbufs in a sockbuf.
|
|
* Check that all resources are reclaimed.
|
|
*/
|
|
void
|
|
sbflush(sb)
|
|
register struct sockbuf *sb;
|
|
{
|
|
|
|
if (sb->sb_flags & SB_LOCK)
|
|
panic("sbflush");
|
|
while (sb->sb_mbcnt)
|
|
sbdrop(sb, (int)sb->sb_cc);
|
|
if (sb->sb_cc || sb->sb_mb)
|
|
panic("sbflush 2");
|
|
}
|
|
|
|
/*
|
|
* Drop data from (the front of) a sockbuf.
|
|
*/
|
|
void
|
|
sbdrop(sb, len)
|
|
register struct sockbuf *sb;
|
|
register int len;
|
|
{
|
|
register struct mbuf *m, *mn;
|
|
struct mbuf *next;
|
|
|
|
next = (m = sb->sb_mb) ? m->m_nextpkt : 0;
|
|
while (len > 0) {
|
|
if (m == 0) {
|
|
if (next == 0)
|
|
panic("sbdrop");
|
|
m = next;
|
|
next = m->m_nextpkt;
|
|
continue;
|
|
}
|
|
if (m->m_len > len) {
|
|
m->m_len -= len;
|
|
m->m_data += len;
|
|
sb->sb_cc -= len;
|
|
break;
|
|
}
|
|
len -= m->m_len;
|
|
sbfree(sb, m);
|
|
MFREE(m, mn);
|
|
m = mn;
|
|
}
|
|
while (m && m->m_len == 0) {
|
|
sbfree(sb, m);
|
|
MFREE(m, mn);
|
|
m = mn;
|
|
}
|
|
if (m) {
|
|
sb->sb_mb = m;
|
|
m->m_nextpkt = next;
|
|
} else
|
|
sb->sb_mb = next;
|
|
}
|
|
|
|
/*
|
|
* Drop a record off the front of a sockbuf
|
|
* and move the next record to the front.
|
|
*/
|
|
void
|
|
sbdroprecord(sb)
|
|
register struct sockbuf *sb;
|
|
{
|
|
register struct mbuf *m, *mn;
|
|
|
|
m = sb->sb_mb;
|
|
if (m) {
|
|
sb->sb_mb = m->m_nextpkt;
|
|
do {
|
|
sbfree(sb, m);
|
|
MFREE(m, mn);
|
|
m = mn;
|
|
} while (m);
|
|
}
|
|
}
|
|
|
|
#ifdef PRU_OLDSTYLE
|
|
/*
|
|
* The following routines mediate between the old-style `pr_usrreq'
|
|
* protocol implementations and the new-style `struct pr_usrreqs'
|
|
* calling convention.
|
|
*/
|
|
|
|
/* syntactic sugar */
|
|
#define nomb (struct mbuf *)0
|
|
|
|
static int
|
|
old_abort(struct socket *so)
|
|
{
|
|
return so->so_proto->pr_ousrreq(so, PRU_ABORT, nomb, nomb, nomb);
|
|
}
|
|
|
|
static int
|
|
old_accept(struct socket *so, struct mbuf *nam)
|
|
{
|
|
return so->so_proto->pr_ousrreq(so, PRU_ACCEPT, nomb, nam, nomb);
|
|
}
|
|
|
|
static int
|
|
old_attach(struct socket *so, int proto)
|
|
{
|
|
return so->so_proto->pr_ousrreq(so, PRU_ATTACH, nomb,
|
|
(struct mbuf *)proto, /* XXX */
|
|
nomb);
|
|
}
|
|
|
|
static int
|
|
old_bind(struct socket *so, struct mbuf *nam)
|
|
{
|
|
return so->so_proto->pr_ousrreq(so, PRU_BIND, nomb, nam, nomb);
|
|
}
|
|
|
|
static int
|
|
old_connect(struct socket *so, struct mbuf *nam)
|
|
{
|
|
return so->so_proto->pr_ousrreq(so, PRU_CONNECT, nomb, nam, nomb);
|
|
}
|
|
|
|
static int
|
|
old_connect2(struct socket *so1, struct socket *so2)
|
|
{
|
|
return so1->so_proto->pr_ousrreq(so1, PRU_CONNECT2, nomb,
|
|
(struct mbuf *)so2, nomb);
|
|
}
|
|
|
|
static int
|
|
old_control(struct socket *so, int cmd, caddr_t data, struct ifnet *ifp)
|
|
{
|
|
return so->so_proto->pr_ousrreq(so, PRU_CONTROL, (struct mbuf *)cmd,
|
|
(struct mbuf *)data,
|
|
(struct mbuf *)ifp);
|
|
}
|
|
|
|
static int
|
|
old_detach(struct socket *so)
|
|
{
|
|
return so->so_proto->pr_ousrreq(so, PRU_DETACH, nomb, nomb, nomb);
|
|
}
|
|
|
|
static int
|
|
old_disconnect(struct socket *so)
|
|
{
|
|
return so->so_proto->pr_ousrreq(so, PRU_DISCONNECT, nomb, nomb, nomb);
|
|
}
|
|
|
|
static int
|
|
old_listen(struct socket *so)
|
|
{
|
|
return so->so_proto->pr_ousrreq(so, PRU_LISTEN, nomb, nomb, nomb);
|
|
}
|
|
|
|
static int
|
|
old_peeraddr(struct socket *so, struct mbuf *nam)
|
|
{
|
|
return so->so_proto->pr_ousrreq(so, PRU_PEERADDR, nomb, nam, nomb);
|
|
}
|
|
|
|
static int
|
|
old_rcvd(struct socket *so, int flags)
|
|
{
|
|
return so->so_proto->pr_ousrreq(so, PRU_RCVD, nomb,
|
|
(struct mbuf *)flags, /* XXX */
|
|
nomb);
|
|
}
|
|
|
|
static int
|
|
old_rcvoob(struct socket *so, struct mbuf *m, int flags)
|
|
{
|
|
return so->so_proto->pr_ousrreq(so, PRU_RCVOOB, m,
|
|
(struct mbuf *)flags, /* XXX */
|
|
nomb);
|
|
}
|
|
|
|
static int
|
|
old_send(struct socket *so, int flags, struct mbuf *m, struct mbuf *addr,
|
|
struct mbuf *control)
|
|
{
|
|
int req;
|
|
|
|
if (flags & PRUS_OOB) {
|
|
req = PRU_SENDOOB;
|
|
} else if(flags & PRUS_EOF) {
|
|
req = PRU_SEND_EOF;
|
|
} else {
|
|
req = PRU_SEND;
|
|
}
|
|
return so->so_proto->pr_ousrreq(so, req, m, addr, control);
|
|
}
|
|
|
|
static int
|
|
old_sense(struct socket *so, struct stat *sb)
|
|
{
|
|
return so->so_proto->pr_ousrreq(so, PRU_SENSE, (struct mbuf *)sb,
|
|
nomb, nomb);
|
|
}
|
|
|
|
static int
|
|
old_shutdown(struct socket *so)
|
|
{
|
|
return so->so_proto->pr_ousrreq(so, PRU_SHUTDOWN, nomb, nomb, nomb);
|
|
}
|
|
|
|
static int
|
|
old_sockaddr(struct socket *so, struct mbuf *nam)
|
|
{
|
|
return so->so_proto->pr_ousrreq(so, PRU_SOCKADDR, nomb, nam, nomb);
|
|
}
|
|
|
|
struct pr_usrreqs pru_oldstyle = {
|
|
old_abort, old_accept, old_attach, old_bind, old_connect,
|
|
old_connect2, old_control, old_detach, old_disconnect,
|
|
old_listen, old_peeraddr, old_rcvd, old_rcvoob, old_send,
|
|
old_sense, old_shutdown, old_sockaddr
|
|
};
|
|
|
|
#endif /* PRU_OLDSTYLE */
|
|
|
|
/*
|
|
* Some routines that return EOPNOTSUPP for entry points that are not
|
|
* supported by a protocol. Fill in as needed.
|
|
*/
|
|
int
|
|
pru_connect2_notsupp(struct socket *so1, struct socket *so2)
|
|
{
|
|
return EOPNOTSUPP;
|
|
}
|