1422 lines
36 KiB
C
1422 lines
36 KiB
C
/* $NetBSD: tcp_usrreq.c,v 1.93 2004/12/15 04:25:20 thorpej Exp $ */
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/*
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* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
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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 project 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 PROJECT 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 PROJECT 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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/*-
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* Copyright (c) 1997, 1998 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Jason R. Thorpe and Kevin M. Lahey of the Numerical Aerospace Simulation
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* Facility, NASA Ames Research Center.
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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 NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Copyright (c) 1982, 1986, 1988, 1993, 1995
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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. 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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* @(#)tcp_usrreq.c 8.5 (Berkeley) 6/21/95
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: tcp_usrreq.c,v 1.93 2004/12/15 04:25:20 thorpej Exp $");
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#include "opt_inet.h"
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#include "opt_ipsec.h"
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#include "opt_tcp_debug.h"
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#include "opt_mbuftrace.h"
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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/malloc.h>
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#include <sys/mbuf.h>
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#include <sys/socket.h>
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#include <sys/socketvar.h>
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#include <sys/protosw.h>
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#include <sys/errno.h>
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#include <sys/stat.h>
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#include <sys/proc.h>
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#include <sys/domain.h>
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#include <sys/sysctl.h>
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#include <net/if.h>
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#include <net/route.h>
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#include <netinet/in.h>
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#include <netinet/in_systm.h>
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#include <netinet/in_var.h>
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#include <netinet/ip.h>
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#include <netinet/in_pcb.h>
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#include <netinet/ip_var.h>
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#ifdef INET6
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#ifndef INET
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#include <netinet/in.h>
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#endif
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#include <netinet/ip6.h>
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#include <netinet6/in6_pcb.h>
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#include <netinet6/ip6_var.h>
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#endif
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#include <netinet/tcp.h>
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#include <netinet/tcp_fsm.h>
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#include <netinet/tcp_seq.h>
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#include <netinet/tcp_timer.h>
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#include <netinet/tcp_var.h>
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#include <netinet/tcpip.h>
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#include <netinet/tcp_debug.h>
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#include "opt_tcp_space.h"
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#ifdef IPSEC
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#include <netinet6/ipsec.h>
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#endif /*IPSEC*/
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/*
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* TCP protocol interface to socket abstraction.
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*/
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/*
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* Process a TCP user request for TCP tb. If this is a send request
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* then m is the mbuf chain of send data. If this is a timer expiration
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* (called from the software clock routine), then timertype tells which timer.
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*/
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/*ARGSUSED*/
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int
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tcp_usrreq(so, req, m, nam, control, p)
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struct socket *so;
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int req;
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struct mbuf *m, *nam, *control;
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struct proc *p;
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{
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struct inpcb *inp;
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#ifdef INET6
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struct in6pcb *in6p;
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#endif
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struct tcpcb *tp = NULL;
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int s;
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int error = 0;
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#ifdef TCP_DEBUG
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int ostate = 0;
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#endif
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int family; /* family of the socket */
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family = so->so_proto->pr_domain->dom_family;
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if (req == PRU_CONTROL) {
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switch (family) {
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#ifdef INET
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case PF_INET:
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return (in_control(so, (long)m, (caddr_t)nam,
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(struct ifnet *)control, p));
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#endif
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#ifdef INET6
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case PF_INET6:
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return (in6_control(so, (long)m, (caddr_t)nam,
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(struct ifnet *)control, p));
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#endif
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default:
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return EAFNOSUPPORT;
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}
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}
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if (req == PRU_PURGEIF) {
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switch (family) {
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#ifdef INET
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case PF_INET:
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in_pcbpurgeif0(&tcbtable, (struct ifnet *)control);
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in_purgeif((struct ifnet *)control);
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in_pcbpurgeif(&tcbtable, (struct ifnet *)control);
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break;
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#endif
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#ifdef INET6
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case PF_INET6:
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in6_pcbpurgeif0(&tcbtable, (struct ifnet *)control);
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in6_purgeif((struct ifnet *)control);
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in6_pcbpurgeif(&tcbtable, (struct ifnet *)control);
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break;
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#endif
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default:
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return (EAFNOSUPPORT);
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}
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return (0);
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}
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s = splsoftnet();
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switch (family) {
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#ifdef INET
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case PF_INET:
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inp = sotoinpcb(so);
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#ifdef INET6
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in6p = NULL;
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#endif
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break;
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#endif
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#ifdef INET6
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case PF_INET6:
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inp = NULL;
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in6p = sotoin6pcb(so);
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break;
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#endif
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default:
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splx(s);
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return EAFNOSUPPORT;
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}
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#ifdef DIAGNOSTIC
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#ifdef INET6
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if (inp && in6p)
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panic("tcp_usrreq: both inp and in6p set to non-NULL");
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#endif
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if (req != PRU_SEND && req != PRU_SENDOOB && control)
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panic("tcp_usrreq: unexpected control mbuf");
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#endif
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/*
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* When a TCP is attached to a socket, then there will be
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* a (struct inpcb) pointed at by the socket, and this
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* structure will point at a subsidary (struct tcpcb).
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*/
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#ifndef INET6
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if (inp == 0 && req != PRU_ATTACH)
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#else
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if ((inp == 0 && in6p == 0) && req != PRU_ATTACH)
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#endif
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{
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error = EINVAL;
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goto release;
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}
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#ifdef INET
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if (inp) {
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tp = intotcpcb(inp);
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/* WHAT IF TP IS 0? */
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#ifdef KPROF
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tcp_acounts[tp->t_state][req]++;
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#endif
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#ifdef TCP_DEBUG
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ostate = tp->t_state;
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#endif
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}
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#endif
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#ifdef INET6
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if (in6p) {
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tp = in6totcpcb(in6p);
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/* WHAT IF TP IS 0? */
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#ifdef KPROF
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tcp_acounts[tp->t_state][req]++;
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#endif
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#ifdef TCP_DEBUG
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ostate = tp->t_state;
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#endif
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}
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#endif
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switch (req) {
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/*
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* TCP attaches to socket via PRU_ATTACH, reserving space,
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* and an internet control block.
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*/
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case PRU_ATTACH:
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#ifndef INET6
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if (inp != 0)
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#else
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if (inp != 0 || in6p != 0)
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#endif
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{
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error = EISCONN;
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break;
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}
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error = tcp_attach(so);
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if (error)
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break;
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if ((so->so_options & SO_LINGER) && so->so_linger == 0)
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so->so_linger = TCP_LINGERTIME;
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tp = sototcpcb(so);
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break;
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/*
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* PRU_DETACH detaches the TCP protocol from the socket.
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*/
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case PRU_DETACH:
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tp = tcp_disconnect(tp);
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break;
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/*
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* Give the socket an address.
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*/
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case PRU_BIND:
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switch (family) {
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#ifdef INET
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case PF_INET:
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error = in_pcbbind(inp, nam, p);
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break;
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#endif
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#ifdef INET6
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case PF_INET6:
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error = in6_pcbbind(in6p, nam, p);
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if (!error) {
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/* mapped addr case */
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if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr))
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tp->t_family = AF_INET;
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else
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tp->t_family = AF_INET6;
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}
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break;
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#endif
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}
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break;
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/*
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* Prepare to accept connections.
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*/
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case PRU_LISTEN:
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#ifdef INET
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if (inp && inp->inp_lport == 0) {
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error = in_pcbbind(inp, (struct mbuf *)0,
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(struct proc *)0);
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if (error)
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break;
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}
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#endif
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#ifdef INET6
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if (in6p && in6p->in6p_lport == 0) {
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error = in6_pcbbind(in6p, (struct mbuf *)0,
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(struct proc *)0);
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if (error)
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break;
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}
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#endif
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tp->t_state = TCPS_LISTEN;
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break;
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/*
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* Initiate connection to peer.
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* Create a template for use in transmissions on this connection.
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* Enter SYN_SENT state, and mark socket as connecting.
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* Start keep-alive timer, and seed output sequence space.
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* Send initial segment on connection.
|
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*/
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case PRU_CONNECT:
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#ifdef INET
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if (inp) {
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if (inp->inp_lport == 0) {
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error = in_pcbbind(inp, (struct mbuf *)0,
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(struct proc *)0);
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if (error)
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break;
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}
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error = in_pcbconnect(inp, nam);
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}
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#endif
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#ifdef INET6
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if (in6p) {
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if (in6p->in6p_lport == 0) {
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error = in6_pcbbind(in6p, (struct mbuf *)0,
|
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(struct proc *)0);
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if (error)
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break;
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}
|
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error = in6_pcbconnect(in6p, nam);
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if (!error) {
|
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/* mapped addr case */
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if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_faddr))
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tp->t_family = AF_INET;
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else
|
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tp->t_family = AF_INET6;
|
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}
|
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}
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#endif
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if (error)
|
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break;
|
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tp->t_template = tcp_template(tp);
|
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if (tp->t_template == 0) {
|
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#ifdef INET
|
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if (inp)
|
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in_pcbdisconnect(inp);
|
|
#endif
|
|
#ifdef INET6
|
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if (in6p)
|
|
in6_pcbdisconnect(in6p);
|
|
#endif
|
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error = ENOBUFS;
|
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break;
|
|
}
|
|
/* Compute window scaling to request. */
|
|
while (tp->request_r_scale < TCP_MAX_WINSHIFT &&
|
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(TCP_MAXWIN << tp->request_r_scale) < so->so_rcv.sb_hiwat)
|
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tp->request_r_scale++;
|
|
soisconnecting(so);
|
|
tcpstat.tcps_connattempt++;
|
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tp->t_state = TCPS_SYN_SENT;
|
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TCP_TIMER_ARM(tp, TCPT_KEEP, TCPTV_KEEP_INIT);
|
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tp->iss = tcp_new_iss(tp, 0);
|
|
tcp_sendseqinit(tp);
|
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error = tcp_output(tp);
|
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break;
|
|
|
|
/*
|
|
* Create a TCP connection between two sockets.
|
|
*/
|
|
case PRU_CONNECT2:
|
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error = EOPNOTSUPP;
|
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break;
|
|
|
|
/*
|
|
* Initiate disconnect from peer.
|
|
* If connection never passed embryonic stage, just drop;
|
|
* else if don't need to let data drain, then can just drop anyways,
|
|
* else have to begin TCP shutdown process: mark socket disconnecting,
|
|
* drain unread data, state switch to reflect user close, and
|
|
* send segment (e.g. FIN) to peer. Socket will be really disconnected
|
|
* when peer sends FIN and acks ours.
|
|
*
|
|
* SHOULD IMPLEMENT LATER PRU_CONNECT VIA REALLOC TCPCB.
|
|
*/
|
|
case PRU_DISCONNECT:
|
|
tp = tcp_disconnect(tp);
|
|
break;
|
|
|
|
/*
|
|
* Accept a connection. Essentially all the work is
|
|
* done at higher levels; just return the address
|
|
* of the peer, storing through addr.
|
|
*/
|
|
case PRU_ACCEPT:
|
|
#ifdef INET
|
|
if (inp)
|
|
in_setpeeraddr(inp, nam);
|
|
#endif
|
|
#ifdef INET6
|
|
if (in6p)
|
|
in6_setpeeraddr(in6p, nam);
|
|
#endif
|
|
break;
|
|
|
|
/*
|
|
* Mark the connection as being incapable of further output.
|
|
*/
|
|
case PRU_SHUTDOWN:
|
|
socantsendmore(so);
|
|
tp = tcp_usrclosed(tp);
|
|
if (tp)
|
|
error = tcp_output(tp);
|
|
break;
|
|
|
|
/*
|
|
* After a receive, possibly send window update to peer.
|
|
*/
|
|
case PRU_RCVD:
|
|
/*
|
|
* soreceive() calls this function when a user receives
|
|
* ancillary data on a listening socket. We don't call
|
|
* tcp_output in such a case, since there is no header
|
|
* template for a listening socket and hence the kernel
|
|
* will panic.
|
|
*/
|
|
if ((so->so_state & (SS_ISCONNECTED|SS_ISCONNECTING)) != 0)
|
|
(void) tcp_output(tp);
|
|
break;
|
|
|
|
/*
|
|
* Do a send by putting data in output queue and updating urgent
|
|
* marker if URG set. Possibly send more data.
|
|
*/
|
|
case PRU_SEND:
|
|
if (control && control->m_len) {
|
|
m_freem(control);
|
|
m_freem(m);
|
|
error = EINVAL;
|
|
break;
|
|
}
|
|
sbappendstream(&so->so_snd, m);
|
|
error = tcp_output(tp);
|
|
break;
|
|
|
|
/*
|
|
* Abort the TCP.
|
|
*/
|
|
case PRU_ABORT:
|
|
tp = tcp_drop(tp, ECONNABORTED);
|
|
break;
|
|
|
|
case PRU_SENSE:
|
|
/*
|
|
* stat: don't bother with a blocksize.
|
|
*/
|
|
splx(s);
|
|
return (0);
|
|
|
|
case PRU_RCVOOB:
|
|
if (control && control->m_len) {
|
|
m_freem(control);
|
|
m_freem(m);
|
|
error = EINVAL;
|
|
break;
|
|
}
|
|
if ((so->so_oobmark == 0 &&
|
|
(so->so_state & SS_RCVATMARK) == 0) ||
|
|
so->so_options & SO_OOBINLINE ||
|
|
tp->t_oobflags & TCPOOB_HADDATA) {
|
|
error = EINVAL;
|
|
break;
|
|
}
|
|
if ((tp->t_oobflags & TCPOOB_HAVEDATA) == 0) {
|
|
error = EWOULDBLOCK;
|
|
break;
|
|
}
|
|
m->m_len = 1;
|
|
*mtod(m, caddr_t) = tp->t_iobc;
|
|
if (((long)nam & MSG_PEEK) == 0)
|
|
tp->t_oobflags ^= (TCPOOB_HAVEDATA | TCPOOB_HADDATA);
|
|
break;
|
|
|
|
case PRU_SENDOOB:
|
|
if (sbspace(&so->so_snd) < -512) {
|
|
m_freem(m);
|
|
error = ENOBUFS;
|
|
break;
|
|
}
|
|
/*
|
|
* According to RFC961 (Assigned Protocols),
|
|
* the urgent pointer points to the last octet
|
|
* of urgent data. We continue, however,
|
|
* to consider it to indicate the first octet
|
|
* of data past the urgent section.
|
|
* Otherwise, snd_up should be one lower.
|
|
*/
|
|
sbappendstream(&so->so_snd, m);
|
|
tp->snd_up = tp->snd_una + so->so_snd.sb_cc;
|
|
tp->t_force = 1;
|
|
error = tcp_output(tp);
|
|
tp->t_force = 0;
|
|
break;
|
|
|
|
case PRU_SOCKADDR:
|
|
#ifdef INET
|
|
if (inp)
|
|
in_setsockaddr(inp, nam);
|
|
#endif
|
|
#ifdef INET6
|
|
if (in6p)
|
|
in6_setsockaddr(in6p, nam);
|
|
#endif
|
|
break;
|
|
|
|
case PRU_PEERADDR:
|
|
#ifdef INET
|
|
if (inp)
|
|
in_setpeeraddr(inp, nam);
|
|
#endif
|
|
#ifdef INET6
|
|
if (in6p)
|
|
in6_setpeeraddr(in6p, nam);
|
|
#endif
|
|
break;
|
|
|
|
default:
|
|
panic("tcp_usrreq");
|
|
}
|
|
#ifdef TCP_DEBUG
|
|
if (tp && (so->so_options & SO_DEBUG))
|
|
tcp_trace(TA_USER, ostate, tp, NULL, req);
|
|
#endif
|
|
|
|
release:
|
|
splx(s);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
tcp_ctloutput(op, so, level, optname, mp)
|
|
int op;
|
|
struct socket *so;
|
|
int level, optname;
|
|
struct mbuf **mp;
|
|
{
|
|
int error = 0, s;
|
|
struct inpcb *inp;
|
|
#ifdef INET6
|
|
struct in6pcb *in6p;
|
|
#endif
|
|
struct tcpcb *tp;
|
|
struct mbuf *m;
|
|
int i;
|
|
int family; /* family of the socket */
|
|
|
|
family = so->so_proto->pr_domain->dom_family;
|
|
|
|
s = splsoftnet();
|
|
switch (family) {
|
|
#ifdef INET
|
|
case PF_INET:
|
|
inp = sotoinpcb(so);
|
|
#ifdef INET6
|
|
in6p = NULL;
|
|
#endif
|
|
break;
|
|
#endif
|
|
#ifdef INET6
|
|
case PF_INET6:
|
|
inp = NULL;
|
|
in6p = sotoin6pcb(so);
|
|
break;
|
|
#endif
|
|
default:
|
|
splx(s);
|
|
return EAFNOSUPPORT;
|
|
}
|
|
#ifndef INET6
|
|
if (inp == NULL)
|
|
#else
|
|
if (inp == NULL && in6p == NULL)
|
|
#endif
|
|
{
|
|
splx(s);
|
|
if (op == PRCO_SETOPT && *mp)
|
|
(void) m_free(*mp);
|
|
return (ECONNRESET);
|
|
}
|
|
if (level != IPPROTO_TCP) {
|
|
switch (family) {
|
|
#ifdef INET
|
|
case PF_INET:
|
|
error = ip_ctloutput(op, so, level, optname, mp);
|
|
break;
|
|
#endif
|
|
#ifdef INET6
|
|
case PF_INET6:
|
|
error = ip6_ctloutput(op, so, level, optname, mp);
|
|
break;
|
|
#endif
|
|
}
|
|
splx(s);
|
|
return (error);
|
|
}
|
|
if (inp)
|
|
tp = intotcpcb(inp);
|
|
#ifdef INET6
|
|
else if (in6p)
|
|
tp = in6totcpcb(in6p);
|
|
#endif
|
|
else
|
|
tp = NULL;
|
|
|
|
switch (op) {
|
|
|
|
case PRCO_SETOPT:
|
|
m = *mp;
|
|
switch (optname) {
|
|
|
|
#ifdef TCP_SIGNATURE
|
|
case TCP_MD5SIG:
|
|
if (m == NULL || m->m_len < sizeof (int))
|
|
error = EINVAL;
|
|
if (error)
|
|
break;
|
|
if (*mtod(m, int *) > 0)
|
|
tp->t_flags |= TF_SIGNATURE;
|
|
else
|
|
tp->t_flags &= ~TF_SIGNATURE;
|
|
break;
|
|
#endif /* TCP_SIGNATURE */
|
|
|
|
case TCP_NODELAY:
|
|
if (m == NULL || m->m_len < sizeof (int))
|
|
error = EINVAL;
|
|
else if (*mtod(m, int *))
|
|
tp->t_flags |= TF_NODELAY;
|
|
else
|
|
tp->t_flags &= ~TF_NODELAY;
|
|
break;
|
|
|
|
case TCP_MAXSEG:
|
|
if (m && (i = *mtod(m, int *)) > 0 &&
|
|
i <= tp->t_peermss)
|
|
tp->t_peermss = i; /* limit on send size */
|
|
else
|
|
error = EINVAL;
|
|
break;
|
|
|
|
default:
|
|
error = ENOPROTOOPT;
|
|
break;
|
|
}
|
|
if (m)
|
|
(void) m_free(m);
|
|
break;
|
|
|
|
case PRCO_GETOPT:
|
|
*mp = m = m_get(M_WAIT, MT_SOOPTS);
|
|
m->m_len = sizeof(int);
|
|
MCLAIM(m, so->so_mowner);
|
|
|
|
switch (optname) {
|
|
#ifdef TCP_SIGNATURE
|
|
case TCP_MD5SIG:
|
|
*mtod(m, int *) = (tp->t_flags & TF_SIGNATURE) ? 1 : 0;
|
|
break;
|
|
#endif
|
|
case TCP_NODELAY:
|
|
*mtod(m, int *) = tp->t_flags & TF_NODELAY;
|
|
break;
|
|
case TCP_MAXSEG:
|
|
*mtod(m, int *) = tp->t_peermss;
|
|
break;
|
|
default:
|
|
error = ENOPROTOOPT;
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
splx(s);
|
|
return (error);
|
|
}
|
|
|
|
#ifndef TCP_SENDSPACE
|
|
#define TCP_SENDSPACE 1024*32
|
|
#endif
|
|
int tcp_sendspace = TCP_SENDSPACE;
|
|
#ifndef TCP_RECVSPACE
|
|
#define TCP_RECVSPACE 1024*32
|
|
#endif
|
|
int tcp_recvspace = TCP_RECVSPACE;
|
|
|
|
/*
|
|
* Attach TCP protocol to socket, allocating
|
|
* internet protocol control block, tcp control block,
|
|
* bufer space, and entering LISTEN state if to accept connections.
|
|
*/
|
|
int
|
|
tcp_attach(so)
|
|
struct socket *so;
|
|
{
|
|
struct tcpcb *tp;
|
|
struct inpcb *inp;
|
|
#ifdef INET6
|
|
struct in6pcb *in6p;
|
|
#endif
|
|
int error;
|
|
int family; /* family of the socket */
|
|
|
|
family = so->so_proto->pr_domain->dom_family;
|
|
|
|
#ifdef MBUFTRACE
|
|
so->so_mowner = &tcp_mowner;
|
|
so->so_rcv.sb_mowner = &tcp_rx_mowner;
|
|
so->so_snd.sb_mowner = &tcp_tx_mowner;
|
|
#endif
|
|
if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) {
|
|
error = soreserve(so, tcp_sendspace, tcp_recvspace);
|
|
if (error)
|
|
return (error);
|
|
}
|
|
switch (family) {
|
|
#ifdef INET
|
|
case PF_INET:
|
|
error = in_pcballoc(so, &tcbtable);
|
|
if (error)
|
|
return (error);
|
|
inp = sotoinpcb(so);
|
|
#ifdef INET6
|
|
in6p = NULL;
|
|
#endif
|
|
break;
|
|
#endif
|
|
#ifdef INET6
|
|
case PF_INET6:
|
|
error = in6_pcballoc(so, &tcbtable);
|
|
if (error)
|
|
return (error);
|
|
inp = NULL;
|
|
in6p = sotoin6pcb(so);
|
|
break;
|
|
#endif
|
|
default:
|
|
return EAFNOSUPPORT;
|
|
}
|
|
if (inp)
|
|
tp = tcp_newtcpcb(family, (void *)inp);
|
|
#ifdef INET6
|
|
else if (in6p)
|
|
tp = tcp_newtcpcb(family, (void *)in6p);
|
|
#endif
|
|
else
|
|
tp = NULL;
|
|
|
|
if (tp == 0) {
|
|
int nofd = so->so_state & SS_NOFDREF; /* XXX */
|
|
|
|
so->so_state &= ~SS_NOFDREF; /* don't free the socket yet */
|
|
#ifdef INET
|
|
if (inp)
|
|
in_pcbdetach(inp);
|
|
#endif
|
|
#ifdef INET6
|
|
if (in6p)
|
|
in6_pcbdetach(in6p);
|
|
#endif
|
|
so->so_state |= nofd;
|
|
return (ENOBUFS);
|
|
}
|
|
tp->t_state = TCPS_CLOSED;
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Initiate (or continue) disconnect.
|
|
* If embryonic state, just send reset (once).
|
|
* If in ``let data drain'' option and linger null, just drop.
|
|
* Otherwise (hard), mark socket disconnecting and drop
|
|
* current input data; switch states based on user close, and
|
|
* send segment to peer (with FIN).
|
|
*/
|
|
struct tcpcb *
|
|
tcp_disconnect(tp)
|
|
struct tcpcb *tp;
|
|
{
|
|
struct socket *so;
|
|
|
|
if (tp->t_inpcb)
|
|
so = tp->t_inpcb->inp_socket;
|
|
#ifdef INET6
|
|
else if (tp->t_in6pcb)
|
|
so = tp->t_in6pcb->in6p_socket;
|
|
#endif
|
|
else
|
|
so = NULL;
|
|
|
|
if (TCPS_HAVEESTABLISHED(tp->t_state) == 0)
|
|
tp = tcp_close(tp);
|
|
else if ((so->so_options & SO_LINGER) && so->so_linger == 0)
|
|
tp = tcp_drop(tp, 0);
|
|
else {
|
|
soisdisconnecting(so);
|
|
sbflush(&so->so_rcv);
|
|
tp = tcp_usrclosed(tp);
|
|
if (tp)
|
|
(void) tcp_output(tp);
|
|
}
|
|
return (tp);
|
|
}
|
|
|
|
/*
|
|
* User issued close, and wish to trail through shutdown states:
|
|
* if never received SYN, just forget it. If got a SYN from peer,
|
|
* but haven't sent FIN, then go to FIN_WAIT_1 state to send peer a FIN.
|
|
* If already got a FIN from peer, then almost done; go to LAST_ACK
|
|
* state. In all other cases, have already sent FIN to peer (e.g.
|
|
* after PRU_SHUTDOWN), and just have to play tedious game waiting
|
|
* for peer to send FIN or not respond to keep-alives, etc.
|
|
* We can let the user exit from the close as soon as the FIN is acked.
|
|
*/
|
|
struct tcpcb *
|
|
tcp_usrclosed(tp)
|
|
struct tcpcb *tp;
|
|
{
|
|
|
|
switch (tp->t_state) {
|
|
|
|
case TCPS_CLOSED:
|
|
case TCPS_LISTEN:
|
|
case TCPS_SYN_SENT:
|
|
tp->t_state = TCPS_CLOSED;
|
|
tp = tcp_close(tp);
|
|
break;
|
|
|
|
case TCPS_SYN_RECEIVED:
|
|
case TCPS_ESTABLISHED:
|
|
tp->t_state = TCPS_FIN_WAIT_1;
|
|
break;
|
|
|
|
case TCPS_CLOSE_WAIT:
|
|
tp->t_state = TCPS_LAST_ACK;
|
|
break;
|
|
}
|
|
if (tp && tp->t_state >= TCPS_FIN_WAIT_2) {
|
|
struct socket *so;
|
|
if (tp->t_inpcb)
|
|
so = tp->t_inpcb->inp_socket;
|
|
#ifdef INET6
|
|
else if (tp->t_in6pcb)
|
|
so = tp->t_in6pcb->in6p_socket;
|
|
#endif
|
|
else
|
|
so = NULL;
|
|
soisdisconnected(so);
|
|
/*
|
|
* If we are in FIN_WAIT_2, we arrived here because the
|
|
* application did a shutdown of the send side. Like the
|
|
* case of a transition from FIN_WAIT_1 to FIN_WAIT_2 after
|
|
* a full close, we start a timer to make sure sockets are
|
|
* not left in FIN_WAIT_2 forever.
|
|
*/
|
|
if ((tp->t_state == TCPS_FIN_WAIT_2) && (tcp_maxidle > 0))
|
|
TCP_TIMER_ARM(tp, TCPT_2MSL, tcp_maxidle);
|
|
}
|
|
return (tp);
|
|
}
|
|
|
|
/*
|
|
* sysctl helper routine for net.inet.ip.mssdflt. it can't be less
|
|
* than 32.
|
|
*/
|
|
static int
|
|
sysctl_net_inet_tcp_mssdflt(SYSCTLFN_ARGS)
|
|
{
|
|
int error, mssdflt;
|
|
struct sysctlnode node;
|
|
|
|
mssdflt = tcp_mssdflt;
|
|
node = *rnode;
|
|
node.sysctl_data = &mssdflt;
|
|
error = sysctl_lookup(SYSCTLFN_CALL(&node));
|
|
if (error || newp == NULL)
|
|
return (error);
|
|
|
|
if (mssdflt < 32)
|
|
return (EINVAL);
|
|
tcp_mssdflt = mssdflt;
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* sysctl helper routine for setting port related values under
|
|
* net.inet.ip and net.inet6.ip6. does basic range checking and does
|
|
* additional checks for each type. this code has placed in
|
|
* tcp_input.c since INET and INET6 both use the same tcp code.
|
|
*
|
|
* this helper is not static so that both inet and inet6 can use it.
|
|
*/
|
|
int
|
|
sysctl_net_inet_ip_ports(SYSCTLFN_ARGS)
|
|
{
|
|
int error, tmp;
|
|
int apmin, apmax;
|
|
#ifndef IPNOPRIVPORTS
|
|
int lpmin, lpmax;
|
|
#endif /* IPNOPRIVPORTS */
|
|
struct sysctlnode node;
|
|
|
|
if (namelen != 0)
|
|
return (EINVAL);
|
|
|
|
switch (name[-3]) {
|
|
#ifdef INET
|
|
case PF_INET:
|
|
apmin = anonportmin;
|
|
apmax = anonportmax;
|
|
#ifndef IPNOPRIVPORTS
|
|
lpmin = lowportmin;
|
|
lpmax = lowportmax;
|
|
#endif /* IPNOPRIVPORTS */
|
|
break;
|
|
#endif /* INET */
|
|
#ifdef INET6
|
|
case PF_INET6:
|
|
apmin = ip6_anonportmin;
|
|
apmax = ip6_anonportmax;
|
|
#ifndef IPNOPRIVPORTS
|
|
lpmin = ip6_lowportmin;
|
|
lpmax = ip6_lowportmax;
|
|
#endif /* IPNOPRIVPORTS */
|
|
break;
|
|
#endif /* INET6 */
|
|
default:
|
|
return (EINVAL);
|
|
}
|
|
|
|
/*
|
|
* insert temporary copy into node, perform lookup on
|
|
* temporary, then restore pointer
|
|
*/
|
|
node = *rnode;
|
|
tmp = *(int*)rnode->sysctl_data;
|
|
node.sysctl_data = &tmp;
|
|
error = sysctl_lookup(SYSCTLFN_CALL(&node));
|
|
if (error || newp == NULL)
|
|
return (error);
|
|
|
|
/*
|
|
* simple port range check
|
|
*/
|
|
if (tmp < 0 || tmp > 65535)
|
|
return (EINVAL);
|
|
|
|
/*
|
|
* per-node range checks
|
|
*/
|
|
switch (rnode->sysctl_num) {
|
|
case IPCTL_ANONPORTMIN:
|
|
if (tmp >= apmax)
|
|
return (EINVAL);
|
|
#ifndef IPNOPRIVPORTS
|
|
if (tmp < IPPORT_RESERVED)
|
|
return (EINVAL);
|
|
#endif /* IPNOPRIVPORTS */
|
|
break;
|
|
|
|
case IPCTL_ANONPORTMAX:
|
|
if (apmin >= tmp)
|
|
return (EINVAL);
|
|
#ifndef IPNOPRIVPORTS
|
|
if (tmp < IPPORT_RESERVED)
|
|
return (EINVAL);
|
|
#endif /* IPNOPRIVPORTS */
|
|
break;
|
|
|
|
#ifndef IPNOPRIVPORTS
|
|
case IPCTL_LOWPORTMIN:
|
|
if (tmp >= lpmax ||
|
|
tmp > IPPORT_RESERVEDMAX ||
|
|
tmp < IPPORT_RESERVEDMIN)
|
|
return (EINVAL);
|
|
break;
|
|
|
|
case IPCTL_LOWPORTMAX:
|
|
if (lpmin >= tmp ||
|
|
tmp > IPPORT_RESERVEDMAX ||
|
|
tmp < IPPORT_RESERVEDMIN)
|
|
return (EINVAL);
|
|
break;
|
|
#endif /* IPNOPRIVPORTS */
|
|
|
|
default:
|
|
return (EINVAL);
|
|
}
|
|
|
|
*(int*)rnode->sysctl_data = tmp;
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* sysctl helper routine for the net.inet.tcp.ident and
|
|
* net.inet6.tcp6.ident nodes. contains backwards compat code for the
|
|
* old way of looking up the ident information for ipv4 which involves
|
|
* stuffing the port/addr pairs into the mib lookup.
|
|
*/
|
|
static int
|
|
sysctl_net_inet_tcp_ident(SYSCTLFN_ARGS)
|
|
{
|
|
#ifdef INET
|
|
struct inpcb *inb;
|
|
struct sockaddr_in *si4[2];
|
|
#endif /* INET */
|
|
#ifdef INET6
|
|
struct in6pcb *in6b;
|
|
struct sockaddr_in6 *si6[2];
|
|
#endif /* INET6 */
|
|
struct sockaddr_storage sa[2];
|
|
struct socket *sockp;
|
|
size_t sz;
|
|
uid_t uid;
|
|
int error, pf;
|
|
|
|
if (namelen != 4 && namelen != 0)
|
|
return (EINVAL);
|
|
if (name[-2] != IPPROTO_TCP)
|
|
return (EINVAL);
|
|
pf = name[-3];
|
|
|
|
/* old style lookup, ipv4 only */
|
|
if (namelen == 4) {
|
|
#ifdef INET
|
|
struct in_addr laddr, raddr;
|
|
u_int lport, rport;
|
|
|
|
if (pf != PF_INET)
|
|
return (EPROTONOSUPPORT);
|
|
raddr.s_addr = (uint32_t)name[0];
|
|
rport = (u_int)name[1];
|
|
laddr.s_addr = (uint32_t)name[2];
|
|
lport = (u_int)name[3];
|
|
inb = in_pcblookup_connect(&tcbtable, raddr, rport,
|
|
laddr, lport);
|
|
if (inb == NULL || (sockp = inb->inp_socket) == NULL)
|
|
return (ESRCH);
|
|
uid = sockp->so_uid;
|
|
if (oldp) {
|
|
sz = MIN(sizeof(uid), *oldlenp);
|
|
error = copyout(&uid, oldp, sz);
|
|
if (error)
|
|
return (error);
|
|
}
|
|
*oldlenp = sizeof(uid);
|
|
return (0);
|
|
#else /* INET */
|
|
return (EINVAL);
|
|
#endif /* INET */
|
|
}
|
|
|
|
if (newp == NULL || newlen != sizeof(sa))
|
|
return (EINVAL);
|
|
error = copyin(newp, &sa, newlen);
|
|
if (error)
|
|
return (error);
|
|
|
|
/*
|
|
* requested families must match
|
|
*/
|
|
if (pf != sa[0].ss_family || sa[0].ss_family != sa[1].ss_family)
|
|
return (EINVAL);
|
|
|
|
switch (pf) {
|
|
#ifdef INET
|
|
case PF_INET:
|
|
si4[0] = (struct sockaddr_in*)&sa[0];
|
|
si4[1] = (struct sockaddr_in*)&sa[1];
|
|
if (si4[0]->sin_len != sizeof(*si4[0]) ||
|
|
si4[0]->sin_len != si4[1]->sin_len)
|
|
return (EINVAL);
|
|
inb = in_pcblookup_connect(&tcbtable,
|
|
si4[0]->sin_addr, si4[0]->sin_port,
|
|
si4[1]->sin_addr, si4[1]->sin_port);
|
|
if (inb == NULL || (sockp = inb->inp_socket) == NULL)
|
|
return (ESRCH);
|
|
break;
|
|
#endif /* INET */
|
|
#ifdef INET6
|
|
case PF_INET6:
|
|
si6[0] = (struct sockaddr_in6*)&sa[0];
|
|
si6[1] = (struct sockaddr_in6*)&sa[1];
|
|
if (si6[0]->sin6_len != sizeof(*si6[0]) ||
|
|
si6[0]->sin6_len != si6[1]->sin6_len)
|
|
return (EINVAL);
|
|
in6b = in6_pcblookup_connect(&tcbtable,
|
|
&si6[0]->sin6_addr, si6[0]->sin6_port,
|
|
&si6[1]->sin6_addr, si6[1]->sin6_port, 0);
|
|
if (in6b == NULL || (sockp = in6b->in6p_socket) == NULL)
|
|
return (ESRCH);
|
|
break;
|
|
#endif /* INET6 */
|
|
default:
|
|
return (EPROTONOSUPPORT);
|
|
}
|
|
|
|
uid = sockp->so_uid;
|
|
if (oldp) {
|
|
sz = MIN(sizeof(uid), *oldlenp);
|
|
error = copyout(&uid, oldp, sz);
|
|
if (error)
|
|
return (error);
|
|
}
|
|
*oldlenp = sizeof(uid);
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* this (second stage) setup routine is a replacement for tcp_sysctl()
|
|
* (which is currently used for ipv4 and ipv6)
|
|
*/
|
|
static void
|
|
sysctl_net_inet_tcp_setup2(struct sysctllog **clog, int pf, const char *pfname,
|
|
const char *tcpname)
|
|
{
|
|
|
|
sysctl_createv(clog, 0, NULL, NULL,
|
|
CTLFLAG_PERMANENT,
|
|
CTLTYPE_NODE, "net", NULL,
|
|
NULL, 0, NULL, 0,
|
|
CTL_NET, CTL_EOL);
|
|
sysctl_createv(clog, 0, NULL, NULL,
|
|
CTLFLAG_PERMANENT,
|
|
CTLTYPE_NODE, pfname, NULL,
|
|
NULL, 0, NULL, 0,
|
|
CTL_NET, pf, CTL_EOL);
|
|
sysctl_createv(clog, 0, NULL, NULL,
|
|
CTLFLAG_PERMANENT,
|
|
CTLTYPE_NODE, tcpname,
|
|
SYSCTL_DESCR("TCP related settings"),
|
|
NULL, 0, NULL, 0,
|
|
CTL_NET, pf, IPPROTO_TCP, CTL_EOL);
|
|
|
|
sysctl_createv(clog, 0, NULL, NULL,
|
|
CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
|
|
CTLTYPE_INT, "rfc1323",
|
|
SYSCTL_DESCR("Enable RFC1323 TCP extensions"),
|
|
NULL, 0, &tcp_do_rfc1323, 0,
|
|
CTL_NET, pf, IPPROTO_TCP, TCPCTL_RFC1323, CTL_EOL);
|
|
sysctl_createv(clog, 0, NULL, NULL,
|
|
CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
|
|
CTLTYPE_INT, "sendspace",
|
|
SYSCTL_DESCR("Default TCP send buffer size"),
|
|
NULL, 0, &tcp_sendspace, 0,
|
|
CTL_NET, pf, IPPROTO_TCP, TCPCTL_SENDSPACE, CTL_EOL);
|
|
sysctl_createv(clog, 0, NULL, NULL,
|
|
CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
|
|
CTLTYPE_INT, "recvspace",
|
|
SYSCTL_DESCR("Default TCP receive buffer size"),
|
|
NULL, 0, &tcp_recvspace, 0,
|
|
CTL_NET, pf, IPPROTO_TCP, TCPCTL_RECVSPACE, CTL_EOL);
|
|
sysctl_createv(clog, 0, NULL, NULL,
|
|
CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
|
|
CTLTYPE_INT, "mssdflt",
|
|
SYSCTL_DESCR("Default maximum segment size"),
|
|
sysctl_net_inet_tcp_mssdflt, 0, &tcp_mssdflt, 0,
|
|
CTL_NET, pf, IPPROTO_TCP, TCPCTL_MSSDFLT, CTL_EOL);
|
|
sysctl_createv(clog, 0, NULL, NULL,
|
|
CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
|
|
CTLTYPE_INT, "syn_cache_limit",
|
|
SYSCTL_DESCR("Maximum number of entries in the TCP "
|
|
"compressed state engine"),
|
|
NULL, 0, &tcp_syn_cache_limit, 0,
|
|
CTL_NET, pf, IPPROTO_TCP, TCPCTL_SYN_CACHE_LIMIT,
|
|
CTL_EOL);
|
|
sysctl_createv(clog, 0, NULL, NULL,
|
|
CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
|
|
CTLTYPE_INT, "syn_bucket_limit",
|
|
SYSCTL_DESCR("Maximum number of entries per hash "
|
|
"bucket in the TCP compressed state "
|
|
"engine"),
|
|
NULL, 0, &tcp_syn_bucket_limit, 0,
|
|
CTL_NET, pf, IPPROTO_TCP, TCPCTL_SYN_BUCKET_LIMIT,
|
|
CTL_EOL);
|
|
#if 0 /* obsoleted */
|
|
sysctl_createv(clog, 0, NULL, NULL,
|
|
CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
|
|
CTLTYPE_INT, "syn_cache_interval",
|
|
SYSCTL_DESCR("TCP compressed state engine's timer interval"),
|
|
NULL, 0, &tcp_syn_cache_interval, 0,
|
|
CTL_NET, pf, IPPROTO_TCP, TCPCTL_SYN_CACHE_INTER,
|
|
CTL_EOL);
|
|
#endif
|
|
sysctl_createv(clog, 0, NULL, NULL,
|
|
CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
|
|
CTLTYPE_INT, "init_win",
|
|
SYSCTL_DESCR("Initial TCP congestion window"),
|
|
NULL, 0, &tcp_init_win, 0,
|
|
CTL_NET, pf, IPPROTO_TCP, TCPCTL_INIT_WIN, CTL_EOL);
|
|
sysctl_createv(clog, 0, NULL, NULL,
|
|
CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
|
|
CTLTYPE_INT, "mss_ifmtu",
|
|
SYSCTL_DESCR("Use interface MTU for calculating MSS"),
|
|
NULL, 0, &tcp_mss_ifmtu, 0,
|
|
CTL_NET, pf, IPPROTO_TCP, TCPCTL_MSS_IFMTU, CTL_EOL);
|
|
sysctl_createv(clog, 0, NULL, NULL,
|
|
CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
|
|
CTLTYPE_INT, "sack",
|
|
SYSCTL_DESCR("Enable RFC2018 Selection ACKnowledgement "
|
|
"(not implemented)"),
|
|
NULL, 0, &tcp_do_sack, 0,
|
|
CTL_NET, pf, IPPROTO_TCP, TCPCTL_SACK, CTL_EOL);
|
|
sysctl_createv(clog, 0, NULL, NULL,
|
|
CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
|
|
CTLTYPE_INT, "win_scale",
|
|
SYSCTL_DESCR("Use RFC1323 window scale options"),
|
|
NULL, 0, &tcp_do_win_scale, 0,
|
|
CTL_NET, pf, IPPROTO_TCP, TCPCTL_WSCALE, CTL_EOL);
|
|
sysctl_createv(clog, 0, NULL, NULL,
|
|
CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
|
|
CTLTYPE_INT, "timestamps",
|
|
SYSCTL_DESCR("Use RFC1323 time stamp options"),
|
|
NULL, 0, &tcp_do_timestamps, 0,
|
|
CTL_NET, pf, IPPROTO_TCP, TCPCTL_TSTAMP, CTL_EOL);
|
|
sysctl_createv(clog, 0, NULL, NULL,
|
|
CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
|
|
CTLTYPE_INT, "compat_42",
|
|
SYSCTL_DESCR("Enable workarounds for 4.2BSD TCP bugs"),
|
|
NULL, 0, &tcp_compat_42, 0,
|
|
CTL_NET, pf, IPPROTO_TCP, TCPCTL_COMPAT_42, CTL_EOL);
|
|
sysctl_createv(clog, 0, NULL, NULL,
|
|
CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
|
|
CTLTYPE_INT, "cwm",
|
|
SYSCTL_DESCR("Hughes/Touch/Heidemann Congestion Window "
|
|
"Monitoring"),
|
|
NULL, 0, &tcp_cwm, 0,
|
|
CTL_NET, pf, IPPROTO_TCP, TCPCTL_CWM, CTL_EOL);
|
|
sysctl_createv(clog, 0, NULL, NULL,
|
|
CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
|
|
CTLTYPE_INT, "cwm_burstsize",
|
|
SYSCTL_DESCR("Congestion Window Monitoring allowed "
|
|
"burst count in packets"),
|
|
NULL, 0, &tcp_cwm_burstsize, 0,
|
|
CTL_NET, pf, IPPROTO_TCP, TCPCTL_CWM_BURSTSIZE,
|
|
CTL_EOL);
|
|
sysctl_createv(clog, 0, NULL, NULL,
|
|
CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
|
|
CTLTYPE_INT, "ack_on_push",
|
|
SYSCTL_DESCR("Immediately return ACK when PSH is "
|
|
"received"),
|
|
NULL, 0, &tcp_ack_on_push, 0,
|
|
CTL_NET, pf, IPPROTO_TCP, TCPCTL_ACK_ON_PUSH, CTL_EOL);
|
|
sysctl_createv(clog, 0, NULL, NULL,
|
|
CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
|
|
CTLTYPE_INT, "keepidle",
|
|
SYSCTL_DESCR("Allowed connection idle ticks before a "
|
|
"keepalive probe is sent"),
|
|
NULL, 0, &tcp_keepidle, 0,
|
|
CTL_NET, pf, IPPROTO_TCP, TCPCTL_KEEPIDLE, CTL_EOL);
|
|
sysctl_createv(clog, 0, NULL, NULL,
|
|
CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
|
|
CTLTYPE_INT, "keepintvl",
|
|
SYSCTL_DESCR("Ticks before next keepalive probe is sent"),
|
|
NULL, 0, &tcp_keepintvl, 0,
|
|
CTL_NET, pf, IPPROTO_TCP, TCPCTL_KEEPINTVL, CTL_EOL);
|
|
sysctl_createv(clog, 0, NULL, NULL,
|
|
CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
|
|
CTLTYPE_INT, "keepcnt",
|
|
SYSCTL_DESCR("Number of keepalive probes to send"),
|
|
NULL, 0, &tcp_keepcnt, 0,
|
|
CTL_NET, pf, IPPROTO_TCP, TCPCTL_KEEPCNT, CTL_EOL);
|
|
sysctl_createv(clog, 0, NULL, NULL,
|
|
CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE,
|
|
CTLTYPE_INT, "slowhz",
|
|
SYSCTL_DESCR("Keepalive ticks per second"),
|
|
NULL, PR_SLOWHZ, NULL, 0,
|
|
CTL_NET, pf, IPPROTO_TCP, TCPCTL_SLOWHZ, CTL_EOL);
|
|
sysctl_createv(clog, 0, NULL, NULL,
|
|
CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
|
|
CTLTYPE_INT, "newreno",
|
|
SYSCTL_DESCR("NewReno congestion control algorithm"),
|
|
NULL, 0, &tcp_do_newreno, 0,
|
|
CTL_NET, pf, IPPROTO_TCP, TCPCTL_NEWRENO, CTL_EOL);
|
|
sysctl_createv(clog, 0, NULL, NULL,
|
|
CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
|
|
CTLTYPE_INT, "log_refused",
|
|
SYSCTL_DESCR("Log refused TCP connections"),
|
|
NULL, 0, &tcp_log_refused, 0,
|
|
CTL_NET, pf, IPPROTO_TCP, TCPCTL_LOG_REFUSED, CTL_EOL);
|
|
#if 0 /* obsoleted */
|
|
sysctl_createv(clog, 0, NULL, NULL,
|
|
CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
|
|
CTLTYPE_INT, "rstratelimit", NULL,
|
|
NULL, 0, &tcp_rst_ratelim, 0,
|
|
CTL_NET, pf, IPPROTO_TCP, TCPCTL_RSTRATELIMIT, CTL_EOL);
|
|
#endif
|
|
sysctl_createv(clog, 0, NULL, NULL,
|
|
CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
|
|
CTLTYPE_INT, "rstppslimit",
|
|
SYSCTL_DESCR("Maximum number of RST packets to send "
|
|
"per second"),
|
|
NULL, 0, &tcp_rst_ppslim, 0,
|
|
CTL_NET, pf, IPPROTO_TCP, TCPCTL_RSTPPSLIMIT, CTL_EOL);
|
|
sysctl_createv(clog, 0, NULL, NULL,
|
|
CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
|
|
CTLTYPE_INT, "delack_ticks",
|
|
SYSCTL_DESCR("Number of ticks to delay sending an ACK"),
|
|
NULL, 0, &tcp_delack_ticks, 0,
|
|
CTL_NET, pf, IPPROTO_TCP, TCPCTL_DELACK_TICKS, CTL_EOL);
|
|
sysctl_createv(clog, 0, NULL, NULL,
|
|
CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
|
|
CTLTYPE_INT, "init_win_local",
|
|
SYSCTL_DESCR("Initial TCP window size (in segments)"),
|
|
NULL, 0, &tcp_init_win_local, 0,
|
|
CTL_NET, pf, IPPROTO_TCP, TCPCTL_INIT_WIN_LOCAL,
|
|
CTL_EOL);
|
|
sysctl_createv(clog, 0, NULL, NULL,
|
|
CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
|
|
CTLTYPE_STRUCT, "ident",
|
|
SYSCTL_DESCR("RFC1413 Identification Protocol lookups"),
|
|
sysctl_net_inet_tcp_ident, 0, NULL, sizeof(uid_t),
|
|
CTL_NET, pf, IPPROTO_TCP, TCPCTL_IDENT, CTL_EOL);
|
|
sysctl_createv(clog, 0, NULL, NULL,
|
|
CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
|
|
CTLTYPE_INT, "do_loopback_cksum",
|
|
SYSCTL_DESCR("Perform TCP checksum on loopback"),
|
|
NULL, 0, &tcp_do_loopback_cksum, 0,
|
|
CTL_NET, pf, IPPROTO_TCP, TCPCTL_LOOPBACKCKSUM,
|
|
CTL_EOL);
|
|
}
|
|
|
|
/*
|
|
* Sysctl for tcp variables.
|
|
*/
|
|
#ifdef INET
|
|
SYSCTL_SETUP(sysctl_net_inet_tcp_setup, "sysctl net.inet.tcp subtree setup")
|
|
{
|
|
|
|
sysctl_net_inet_tcp_setup2(clog, PF_INET, "inet", "tcp");
|
|
}
|
|
#endif /* INET */
|
|
|
|
#ifdef INET6
|
|
SYSCTL_SETUP(sysctl_net_inet6_tcp6_setup, "sysctl net.inet6.tcp6 subtree setup")
|
|
{
|
|
|
|
sysctl_net_inet_tcp_setup2(clog, PF_INET6, "inet6", "tcp6");
|
|
}
|
|
#endif /* INET6 */
|
|
|