2 files changed, 0 insertions, 128 deletions
diff --git a/slirp b/slirp
new file mode 160000
+Subproject 59a1b1f165458c2acb7ff0525b543945f741622
diff --git a/slirp/src/tcp_timer.h b/slirp/src/tcp_timer.h
deleted file mode 100644
index 709f63987a..0000000000
--- a/slirp/src/tcp_timer.h
+++ /dev/null
@@ -1,128 +0,0 @@
-/* SPDX-License-Identifier: BSD-3-Clause */
-/*
- * Copyright (c) 1982, 1986, 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- *	@(#)tcp_timer.h	8.1 (Berkeley) 6/10/93
- * tcp_timer.h,v 1.4 1994/08/21 05:27:38 paul Exp
- */
-
-#ifndef TCP_TIMER_H
-#define TCP_TIMER_H
-
-/*
- * Definitions of the TCP timers.  These timers are counted
- * down PR_SLOWHZ times a second.
- */
-#define	TCPT_NTIMERS	4
-
-#define	TCPT_REXMT	0		/* retransmit */
-#define	TCPT_PERSIST	1		/* retransmit persistence */
-#define	TCPT_KEEP	2		/* keep alive */
-#define	TCPT_2MSL	3		/* 2*msl quiet time timer */
-
-/*
- * The TCPT_REXMT timer is used to force retransmissions.
- * The TCP has the TCPT_REXMT timer set whenever segments
- * have been sent for which ACKs are expected but not yet
- * received.  If an ACK is received which advances tp->snd_una,
- * then the retransmit timer is cleared (if there are no more
- * outstanding segments) or reset to the base value (if there
- * are more ACKs expected).  Whenever the retransmit timer goes off,
- * we retransmit one unacknowledged segment, and do a backoff
- * on the retransmit timer.
- *
- * The TCPT_PERSIST timer is used to keep window size information
- * flowing even if the window goes shut.  If all previous transmissions
- * have been acknowledged (so that there are no retransmissions in progress),
- * and the window is too small to bother sending anything, then we start
- * the TCPT_PERSIST timer.  When it expires, if the window is nonzero,
- * we go to transmit state.  Otherwise, at intervals send a single byte
- * into the peer's window to force him to update our window information.
- * We do this at most as often as TCPT_PERSMIN time intervals,
- * but no more frequently than the current estimate of round-trip
- * packet time.  The TCPT_PERSIST timer is cleared whenever we receive
- * a window update from the peer.
- *
- * The TCPT_KEEP timer is used to keep connections alive.  If an
- * connection is idle (no segments received) for TCPTV_KEEP_INIT amount of time,
- * but not yet established, then we drop the connection.  Once the connection
- * is established, if the connection is idle for TCPTV_KEEP_IDLE time
- * (and keepalives have been enabled on the socket), we begin to probe
- * the connection.  We force the peer to send us a segment by sending:
- *	<SEQ=SND.UNA-1><ACK=RCV.NXT><CTL=ACK>
- * This segment is (deliberately) outside the window, and should elicit
- * an ack segment in response from the peer.  If, despite the TCPT_KEEP
- * initiated segments we cannot elicit a response from a peer in TCPT_MAXIDLE
- * amount of time probing, then we drop the connection.
- */
-
-/*
- * Time constants.
- */
-#define TCPTV_MSL       ( 5*PR_SLOWHZ)          /* max seg lifetime (hah!) */
-
-#define	TCPTV_SRTTBASE	0			/* base roundtrip time;
-						   if 0, no idea yet */
-#define	TCPTV_SRTTDFLT	(  3*PR_SLOWHZ)		/* assumed RTT if no info */
-
-#define	TCPTV_PERSMIN	(  5*PR_SLOWHZ)		/* retransmit persistence */
-#define	TCPTV_PERSMAX	( 60*PR_SLOWHZ)		/* maximum persist interval */
-
-#define	TCPTV_KEEP_INIT	( 75*PR_SLOWHZ)		/* initial connect keep alive */
-#define	TCPTV_KEEP_IDLE	(120*60*PR_SLOWHZ)	/* dflt time before probing */
-#define	TCPTV_KEEPINTVL	( 75*PR_SLOWHZ)		/* default probe interval */
-#define	TCPTV_KEEPCNT	8			/* max probes before drop */
-
-#define	TCPTV_MIN	(  1*PR_SLOWHZ)		/* minimum allowable value */
-#define TCPTV_REXMTMAX  ( 12*PR_SLOWHZ)		/* max allowable REXMT value */
-
-#define	TCP_LINGERTIME	120			/* linger at most 2 minutes */
-
-#define TCP_MAXRXTSHIFT 12                      /* maximum retransmits */
-
-
-/*
- * Force a time value to be in a certain range.
- */
-#define	TCPT_RANGESET(tv, value, tvmin, tvmax) { \
-	(tv) = (value); \
-	if ((tv) < (tvmin)) \
-		(tv) = (tvmin); \
-	else if ((tv) > (tvmax)) \
-		(tv) = (tvmax); \
-}
-
-extern const int tcp_backoff[];
-
-struct tcpcb;
-
-void tcp_fasttimo(Slirp *);
-void tcp_slowtimo(Slirp *);
-void tcp_canceltimers(struct tcpcb *);
-
-#endif