Index: sshconnect2.c
===================================================================
--- sshconnect2.c	(revision 223657)
+++ sshconnect2.c	(working copy)
@@ -1,4 +1,5 @@
 /* $OpenBSD: sshconnect2.c,v 1.186 2010/11/29 23:45:51 djm Exp $ */
+/* $FreeBSD$ */
 /*
  * Copyright (c) 2000 Markus Friedl.  All rights reserved.
  * Copyright (c) 2008 Damien Miller.  All rights reserved.
@@ -81,8 +82,18 @@
 extern char *client_version_string;
 extern char *server_version_string;
 extern Options options;
+#ifdef	NONE_CIPHER_ENABLED
+extern Kex *xxx_kex;
 
 /*
+ * tty_flag is set in ssh.c so we can use it here.  If set then prevent
+ * the switch to the null cipher.
+ */
+
+extern int tty_flag;
+#endif
+
+/*
  * SSH2 key exchange
  */
 
@@ -419,6 +430,29 @@
 	pubkey_cleanup(&authctxt);
 	dispatch_range(SSH2_MSG_USERAUTH_MIN, SSH2_MSG_USERAUTH_MAX, NULL);
 
+#ifdef	NONE_CIPHER_ENABLED
+	/*
+	 * If the user explicitly requests to use the none cipher enable it
+	 * post authentication and only if the right conditions are met: both
+	 * of the NONE switches must be true and there must be no tty allocated.
+	 */
+	if (options.none_switch == 1 && options.none_enabled == 1) {
+		if (!tty_flag) {
+			debug("Requesting none cipher re-keying...");
+			myproposal[PROPOSAL_ENC_ALGS_STOC] = "none";
+			myproposal[PROPOSAL_ENC_ALGS_CTOS] = "none";
+			kex_prop2buf(&xxx_kex->my, myproposal);
+			packet_request_rekeying();
+			fprintf(stderr, "WARNING: enabled NONE cipher\n");
+		} else {
+			/* Requested NONE cipher on an interactive session. */
+			debug("Cannot switch to NONE cipher with tty "
+			    "allocated");
+			fprintf(stderr, "NONE cipher switch disabled given "
+			    "a TTY is allocated\n");
+		}
+	}
+#endif
 	debug("Authentication succeeded (%s).", authctxt.method->name);
 }
 
Index: README.hpn
===================================================================
--- README.hpn	(revision 0)
+++ README.hpn	(revision 0)
@@ -0,0 +1,120 @@
+Notes:
+
+NONE CIPHER:
+  To use the NONE option you must have the NoneEnabled switch set on the server
+  and you MUST have *both* NoneEnabled and NoneSwitch set to yes on the client.
+  The NONE feature works with ALL ssh subsystems (as far as we can tell)
+  as long as there is no tty allocated.
+  If a user uses the -T switch to prevent a tty being created the NONE cipher
+  will be disabled. 
+
+
+PERFORMANCE:
+  The performance increase will only be as good as the network and TCP stack
+  tuning on the reciever side of the connection allows.  As a rule of thumb a
+  user will need at least 10Mb/s connection with a 100ms RTT to see a doubling
+  of performance.
+  The HPN-SSH home page  http://www.psc.edu/networking/projects/hpn-ssh
+  describes this in greater detail. 
+
+
+BUFFER SIZES:
+- if HPN is disabled the receive buffer size will be set to the OpenSSH default
+  of 64K.
+
+- if a HPN system connects to a non-HPN system the receive buffer will
+  be set to the HPNBufferSize value. The default is 2MB but user adjustable.
+
+- If a HPN to HPN connection is established a number of different things might
+  happen based on the user options and conditions. 
+
+  Conditions: HPNBufferSize NOT Set, TCPRcvBufPoll enabled, TCPRcvBuf NOT Set 
+  Result: HPN Buffer Size = up to 64MB 
+    This is the default state.  The HPN buffer size will grow to a maximum of
+    64MB as the TCP receive buffer grows.  The maximum HPN Buffer size of 64MB
+    is geared towards 10GigE transcontinental connections. 
+
+  Conditions: HPNBufferSize NOT Set, TCPRcvBufPoll disabled, TCPRcvBuf NOT Set
+  Result: HPN Buffer Size = TCP receive buffer value. 
+    Users on non-autotuning systesm should disable TCPRcvBufPoll in the 
+    ssh_cofig and sshd_config
+
+  Conditions: HPNBufferSize SET, TCPRcvBufPoll disabled, TCPRcvBuf NOT Set
+  Result: HPN Buffer Size = minmum of TCP receive buffer and HPNBufferSize. 
+    This would be the system defined TCP receive buffer (RWIN).
+
+  Conditions: HPNBufferSize SET, TCPRcvBufPoll disabled, TCPRcvBuf SET
+  Result: HPN Buffer Size = minmum of TCPRcvBuf and HPNBufferSize. 
+    Generally there is no need to set both.
+
+  Conditions: HPNBufferSize SET, TCPRcvBufPoll enabled, TCPRcvBuf NOT Set
+  Result: HPN Buffer Size = grows to HPNBufferSize
+    The buffer will grow up to the maximum size specified here. 
+
+  Conditions: HPNBufferSize SET, TCPRcvBufPoll enabled, TCPRcvBuf SET
+  Result: HPN Buffer Size = minmum of TCPRcvBuf and HPNBufferSize. 
+    Generally there is no need to set both of these, especially on autotuning 
+    systems. However, if the users wishes to override the autotuning this would
+    be one way to do it.
+
+  Conditions: HPNBufferSize NOT Set, TCPRcvBufPoll enabled, TCPRcvBuf SET
+  Result: HPN Buffer Size = TCPRcvBuf. 
+   This will override autotuning and set the TCP recieve buffer to the user
+   defined value.
+
+
+HPN SPECIFIC CONFIGURATION OPTIONS:
+
+- HPNDisabled=[yes/no] client/server
+  In some situations, such as transfers on a local area network, the impact 
+  of the HPN code produces a net decrease in performance.  In these cases it is 
+  helpful to disable the HPN functionality. By default HPNDisabled is set to no. 
+
+- HPNBufferSize=[int]KB client/server
+  This is the default buffer size the HPN functionality uses when interacting
+  with non-HPN SSH installations.  Conceptually this is similar to the TcpRcvBuf
+  option as applied to the internal SSH flow control.  This value can range from 
+  1KB to 64MB (1-65536).  Use of oversized or undersized buffers can cause
+  performance problems depending on the roud trip time of the network path.
+  The default size of this buffer is 2MB.
+
+- TcpRcvBufPoll=[yes/no] client/server
+  Enable or disable the polling of the TCP receive buffer through the life 
+  of the connection.  You would want to make sure that this option is enabled 
+  for systems making use of autotuning kernels (linux 2.4.24+, 2.6, MS Vista,
+  FreeBSD 7.x and later). Default is yes.
+
+- TcpRcvBuf=[int]KB client
+  Set the TCP socket receive buffer to n Kilobytes.  It can be set up to the 
+  maximum socket size allowed by the system.  This is useful in situations where 
+  the TCP receive window is set low but the maximum buffer size is set higher
+  (as is typical).  This works on a per TCP connection basis.  You can also use
+  this to artifically limit the transfer rate of the connection.  In these cases
+  the throughput will be no more than n/RTT.  The minimum buffer size is 1KB. 
+  Default is the current system wide TCP receive buffer size.
+
+- NoneEnabled=[yes/no] client/server
+  Enable or disable the use of the None cipher.  Care must always be used when
+  enabling this as it will allow users to send data in the clear.  However, it
+  is important to note that authentication information remains encrypted even
+  if this option is enabled.  Set to no by default.
+
+- NoneSwitch=[yes/no] client
+  Switch the encryption cipher being used to the None cipher after
+  authentication takes place.  NoneEnabled must be enabled on both the client
+  and server side of the connection.  When the connection switches to the NONE
+  cipher a warning is sent to STDERR.  The connection attempt will fail with an
+  error if a client requests a NoneSwitch from the server that does not
+  explicitly have NoneEnabled set to yes.
+  Note: The NONE cipher cannot be used in interactive (shell) sessions and it
+  will fail silently.  Set to no by default.
+
+
+CREDITS:
+
+  This patch was conceived, designed, and led by Chris Rapier (rapier@psc.edu)
+  The majority of the actual coding for versions up to HPN12v1 was performed
+  by Michael Stevens (mstevens@andrew.cmu.edu).
+  The MT-AES-CTR cipher was implemented by Ben Bennet (ben@psc.edu).
+  This work was financed, in part, by Cisco System, Inc., the National Library
+  of Medicine, and the National Science Foundation. 
Index: myproposal.h
===================================================================
--- myproposal.h	(revision 223657)
+++ myproposal.h	(working copy)
@@ -1,4 +1,5 @@
 /* $OpenBSD: myproposal.h,v 1.27 2010/09/01 22:42:13 djm Exp $ */
+/* $FreeBSD$ */
 
 /*
  * Copyright (c) 2000 Markus Friedl.  All rights reserved.
@@ -75,6 +76,10 @@
 	"arcfour256,arcfour128," \
 	"aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc," \
 	"aes192-cbc,aes256-cbc,arcfour,rijndael-cbc@lysator.liu.se"
+#ifdef	NONE_CIPHER_ENABLED
+#define KEX_ENCRYPT_INCLUDE_NONE KEX_DEFAULT_ENCRYPT \
+	",none"
+#endif
 #define	KEX_DEFAULT_MAC \
 	"hmac-md5,hmac-sha1,umac-64@openssh.com,hmac-ripemd160," \
 	"hmac-ripemd160@openssh.com," \
Index: compat.c
===================================================================
--- compat.c	(revision 223657)
+++ compat.c	(working copy)
@@ -1,4 +1,5 @@
 /* $OpenBSD: compat.c,v 1.78 2008/09/11 14:22:37 markus Exp $ */
+/* $FreeBSD$ */
 /*
  * Copyright (c) 1999, 2000, 2001, 2002 Markus Friedl.  All rights reserved.
  *
@@ -170,6 +171,16 @@
 		    strlen(check[i].pat), 0) == 1) {
 			debug("match: %s pat %s", version, check[i].pat);
 			datafellows = check[i].bugs;
+			/*
+			 * Check to see if the remote side is OpenSSH and not
+			 * HPN.  It is utterly strange to check it from the
+			 * version string and expose the option that way.
+			 */
+			if (strstr(version,"OpenSSH") != NULL &&
+			    strstr(version,"hpn") == NULL) {
+				datafellows |= SSH_BUG_LARGEWINDOW;
+				debug("Remote is not HPN-aware");
+			}
 			return;
 		}
 	}
Index: compat.h
===================================================================
--- compat.h	(revision 223657)
+++ compat.h	(working copy)
@@ -1,4 +1,5 @@
 /* $OpenBSD: compat.h,v 1.42 2008/09/11 14:22:37 markus Exp $ */
+/* $FReeBSD$ */
 
 /*
  * Copyright (c) 1999, 2000, 2001 Markus Friedl.  All rights reserved.
@@ -58,6 +59,7 @@
 #define SSH_OLD_FORWARD_ADDR	0x01000000
 #define SSH_BUG_RFWD_ADDR	0x02000000
 #define SSH_NEW_OPENSSH		0x04000000
+#define SSH_BUG_LARGEWINDOW	0x08000000
 
 void     enable_compat13(void);
 void     enable_compat20(void);
Index: sftp.1
===================================================================
--- sftp.1	(revision 223657)
+++ sftp.1	(working copy)
@@ -242,7 +242,8 @@
 Specify how many requests may be outstanding at any one time.
 Increasing this may slightly improve file transfer speed
 but will increase memory usage.
-The default is 64 outstanding requests.
+The default is 256 outstanding requests providing for 8MB 
+of outstanding data with a 32KB buffer.
 .It Fl r
 Recursively copy entire directories when uploading and downloading.
 Note that
Index: ssh.c
===================================================================
--- ssh.c	(revision 223657)
+++ ssh.c	(working copy)
@@ -1,4 +1,5 @@
 /* $OpenBSD: ssh.c,v 1.356 2011/01/06 22:23:53 djm Exp $ */
+/* $FreeBSD$ */
 /*
  * Author: Tatu Ylonen <ylo@cs.hut.fi>
  * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
@@ -546,6 +547,15 @@
 			break;
 		case 'T':
 			no_tty_flag = 1;
+#ifdef	NONE_CIPHER_ENABLED
+			/*
+			 * Ensure that the user does not try to backdoor a
+			 * NONE cipher switch on an interactive session by
+			 * explicitly disabling it if the user asks for a
+			 * session without a tty.
+			 */
+			options.none_switch = 0;
+#endif
 			break;
 		case 'o':
 			dummy = 1;
@@ -1368,9 +1378,46 @@
 	if (!isatty(err))
 		set_nonblock(err);
 
-	window = CHAN_SES_WINDOW_DEFAULT;
+	/*
+	 * We need to check to see what to do about buffer sizes here.
+	 * - In an HPN to non-HPN connection we want to limit the window size to
+	 *   something reasonable in case the far side has the large window bug.
+	 * - In an HPN to HPN connection we want to use the max window size but
+	 *   allow the user to override it.
+	 * - Lastly if HPN is disabled then use the ssh standard window size.
+	 *
+	 * We cannot just do a getsockopt() here and set the ssh window to that
+	 * as in case of autotuning of socket buffers the window would get stuck
+	 * at the initial buffer size, generally less than 96k.  Therefore we
+	 * need to set the maximum ssh window size to the maximum HPN buffer
+	 * size unless the user has set TcpRcvBufPoll to no.  In that case we
+	 * can just set the window to the minimum of HPN buffer size and TCP
+	 * receive buffer size.
+	 */
+	if (tty_flag)
+		options.hpn_buffer_size = CHAN_SES_WINDOW_DEFAULT;
+	else
+		options.hpn_buffer_size = CHAN_HPN_MIN_WINDOW_DEFAULT;
+
+	if (datafellows & SSH_BUG_LARGEWINDOW) {
+		debug("HPN to Non-HPN Connection");
+	} else if (options.tcp_rcv_buf_poll <= 0) {
+		sock_get_rcvbuf(&options.hpn_buffer_size, 0);
+		debug("HPNBufferSize set to TCP RWIN: %d",
+		    options.hpn_buffer_size);
+	} else if (options.tcp_rcv_buf > 0) {
+		sock_get_rcvbuf(&options.hpn_buffer_size,
+		    options.tcp_rcv_buf);
+		debug("HPNBufferSize set to user TCPRcvBuf: %d",
+		    options.hpn_buffer_size);
+	}
+	debug("Final hpn_buffer_size = %d", options.hpn_buffer_size);
+	channel_set_hpn(options.hpn_disabled, options.hpn_buffer_size);
+	window = options.hpn_buffer_size;
+
 	packetmax = CHAN_SES_PACKET_DEFAULT;
 	if (tty_flag) {
+		window = CHAN_SES_WINDOW_DEFAULT;
 		window >>= 1;
 		packetmax >>= 1;
 	}
@@ -1378,7 +1425,10 @@
 	    "session", SSH_CHANNEL_OPENING, in, out, err,
 	    window, packetmax, CHAN_EXTENDED_WRITE,
 	    "client-session", /*nonblock*/0);
-
+	if (!options.hpn_disabled && options.tcp_rcv_buf_poll > 0) {
+		c->dynamic_window = 1;
+		debug("Enabled Dynamic Window Scaling\n");
+	}
 	debug3("ssh_session2_open: channel_new: %d", c->self);
 
 	channel_send_open(c->self);
Index: sshd.c
===================================================================
--- sshd.c	(revision 223657)
+++ sshd.c	(working copy)
@@ -1,4 +1,5 @@
 /* $OpenBSD: sshd.c,v 1.381 2011/01/11 06:13:10 djm Exp $ */
+/* $FreeBSD$ */
 /*
  * Author: Tatu Ylonen <ylo@cs.hut.fi>
  * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
@@ -429,7 +430,7 @@
 		minor = PROTOCOL_MINOR_1;
 	}
 	snprintf(buf, sizeof buf, "SSH-%d.%d-%.100s%s", major, minor,
-	    SSH_VERSION, newline);
+	    SSH_RELEASE, newline);
 	server_version_string = xstrdup(buf);
 
 	/* Send our protocol version identification. */
@@ -1011,6 +1012,8 @@
 	int ret, listen_sock, on = 1;
 	struct addrinfo *ai;
 	char ntop[NI_MAXHOST], strport[NI_MAXSERV];
+	int socksize;
+	socklen_t len;
 
 	for (ai = options.listen_addrs; ai; ai = ai->ai_next) {
 		if (ai->ai_family != AF_INET && ai->ai_family != AF_INET6)
@@ -1051,6 +1054,11 @@
 
 		debug("Bind to port %s on %s.", strport, ntop);
 
+		len = sizeof(socksize);
+		getsockopt(listen_sock, SOL_SOCKET, SO_RCVBUF, &socksize, &len);
+		debug("Server TCP RWIN socket size: %d", socksize);
+		debug("HPN Buffer Size: %d", options.hpn_buffer_size);
+
 		/* Bind the socket to the desired port. */
 		if (bind(listen_sock, ai->ai_addr, ai->ai_addrlen) < 0) {
 			error("Bind to port %s on %s failed: %.200s.",
@@ -1960,6 +1968,9 @@
 	/* Log the connection. */
 	verbose("Connection from %.500s port %d", remote_ip, remote_port);
 
+	/* Set HPN options for the child. */
+	channel_set_hpn(options.hpn_disabled, options.hpn_buffer_size);
+
 	/*
 	 * We don't want to listen forever unless the other side
 	 * successfully authenticates itself.  So we set up an alarm which is
@@ -2319,6 +2330,12 @@
 	if (options.ciphers != NULL) {
 		myproposal[PROPOSAL_ENC_ALGS_CTOS] =
 		myproposal[PROPOSAL_ENC_ALGS_STOC] = options.ciphers;
+#ifdef	NONE_CIPHER_ENABLED
+	} else if (options.none_enabled == 1) {
+		debug ("WARNING: None cipher enabled");
+		myproposal[PROPOSAL_ENC_ALGS_CTOS] =
+		myproposal[PROPOSAL_ENC_ALGS_STOC] = KEX_ENCRYPT_INCLUDE_NONE;
+#endif
 	}
 	myproposal[PROPOSAL_ENC_ALGS_CTOS] =
 	    compat_cipher_proposal(myproposal[PROPOSAL_ENC_ALGS_CTOS]);
Index: sshconnect.c
===================================================================
--- sshconnect.c	(revision 223657)
+++ sshconnect.c	(working copy)
@@ -183,6 +183,29 @@
 }
 
 /*
+ * Set TCP receive buffer if requested.
+ * Note: tuning needs to happen after the socket is created but before the
+ * connection happens so winscale is negotiated properly.
+ */
+static void
+ssh_set_socket_recvbuf(int sock)
+{
+	void *buf = (void *)&options.tcp_rcv_buf;
+	int socksize, sz = sizeof(options.tcp_rcv_buf);
+	socklen_t len = sizeof(int);
+
+	debug("setsockopt attempting to set SO_RCVBUF to %d",
+	    options.tcp_rcv_buf);
+	if (setsockopt(sock, SOL_SOCKET, SO_RCVBUF, buf, sz) >= 0) {
+		getsockopt(sock, SOL_SOCKET, SO_RCVBUF, &socksize, &len);
+		debug("setsockopt SO_RCVBUF: %.100s %d", strerror(errno),
+		    socksize);
+	} else
+		error("Couldn't set socket receive buffer to %d: %.100s",
+		    options.tcp_rcv_buf, strerror(errno));
+}
+
+/*
  * Creates a (possibly privileged) socket for use as the ssh connection.
  */
 static int
@@ -205,6 +228,8 @@
 			    strerror(errno));
 		else
 			debug("Allocated local port %d.", p);
+		if (options.tcp_rcv_buf > 0)
+			ssh_set_socket_recvbuf(sock);
 		return sock;
 	}
 	sock = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
@@ -214,6 +239,9 @@
 	}
 	fcntl(sock, F_SETFD, FD_CLOEXEC);
 
+	if (options.tcp_rcv_buf > 0)
+		ssh_set_socket_recvbuf(sock);
+
 	/* Bind the socket to an alternative local IP address */
 	if (options.bind_address == NULL)
 		return sock;
@@ -557,7 +585,7 @@
 	snprintf(buf, sizeof buf, "SSH-%d.%d-%.100s%s",
 	    compat20 ? PROTOCOL_MAJOR_2 : PROTOCOL_MAJOR_1,
 	    compat20 ? PROTOCOL_MINOR_2 : minor1,
-	    SSH_VERSION, compat20 ? "\r\n" : "\n");
+	    SSH_RELEASE, compat20 ? "\r\n" : "\n");
 	if (roaming_atomicio(vwrite, connection_out, buf, strlen(buf))
 	    != strlen(buf))
 		fatal("write: %.100s", strerror(errno));
Index: buffer.c
===================================================================
--- buffer.c	(revision 223657)
+++ buffer.c	(working copy)
@@ -1,4 +1,5 @@
 /* $OpenBSD: buffer.c,v 1.32 2010/02/09 03:56:28 djm Exp $ */
+/* $FreeBSD$ */
 /*
  * Author: Tatu Ylonen <ylo@cs.hut.fi>
  * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
@@ -25,7 +26,7 @@
 #include "log.h"
 
 #define	BUFFER_MAX_CHUNK	0x100000
-#define	BUFFER_MAX_LEN		0xa00000
+#define	BUFFER_MAX_LEN		0x4000000	/* 64MB */
 #define	BUFFER_ALLOCSZ		0x008000
 
 /* Initializes the buffer structure. */
@@ -165,6 +166,13 @@
 	return buffer->end - buffer->offset;
 }
 
+/* Returns the maximum number of bytes of data that may be in the buffer. */
+u_int
+buffer_get_max_len(void)
+{
+	return (BUFFER_MAX_LEN);
+}
+
 /* Gets data from the beginning of the buffer. */
 
 int
Index: sftp.c
===================================================================
--- sftp.c	(revision 223657)
+++ sftp.c	(working copy)
@@ -1,4 +1,5 @@
 /* $OpenBSD: sftp.c,v 1.132 2010/12/04 00:18:01 djm Exp $ */
+/* $FreeBSD$ */
 /*
  * Copyright (c) 2001-2004 Damien Miller <djm@openbsd.org>
  *
@@ -69,7 +70,7 @@
 #include "sftp-client.h"
 
 #define DEFAULT_COPY_BUFLEN	32768	/* Size of buffer for up/download */
-#define DEFAULT_NUM_REQUESTS	64	/* # concurrent outstanding requests */
+#define DEFAULT_NUM_REQUESTS	256	/* # concurrent outstanding requests */
 
 /* File to read commands from */
 FILE* infile;
Index: buffer.h
===================================================================
--- buffer.h	(revision 223657)
+++ buffer.h	(working copy)
@@ -1,4 +1,5 @@
 /* $OpenBSD: buffer.h,v 1.21 2010/08/31 11:54:45 djm Exp $ */
+/* $FreeBSD$ */
 
 /*
  * Author: Tatu Ylonen <ylo@cs.hut.fi>
@@ -46,6 +47,8 @@
 int	 buffer_consume_ret(Buffer *, u_int);
 int	 buffer_consume_end_ret(Buffer *, u_int);
 
+u_int	 buffer_get_max_len(void);
+
 #include <openssl/bn.h>
 
 void    buffer_put_bignum(Buffer *, const BIGNUM *);
Index: session.c
===================================================================
--- session.c	(revision 223657)
+++ session.c	(working copy)
@@ -1,4 +1,5 @@
 /* $OpenBSD: session.c,v 1.258 2010/11/25 04:10:09 djm Exp $ */
+/* $FreeBSD$ */
 /*
  * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
  *                    All rights reserved
@@ -232,7 +233,10 @@
 		goto authsock_err;
 	}
 
-	/* Allocate a channel for the authentication agent socket. */
+	/*
+	 * Allocate a channel for the authentication agent socket.
+	 * Ignore HPN on that one given no improvement expected.
+	 */
 	nc = channel_new("auth socket",
 	    SSH_CHANNEL_AUTH_SOCKET, sock, sock, -1,
 	    CHAN_X11_WINDOW_DEFAULT, CHAN_X11_PACKET_DEFAULT,
@@ -2283,10 +2287,14 @@
 	 */
 	if (s->chanid == -1)
 		fatal("no channel for session %d", s->self);
-	channel_set_fds(s->chanid,
-	    fdout, fdin, fderr,
-	    ignore_fderr ? CHAN_EXTENDED_IGNORE : CHAN_EXTENDED_READ,
-	    1, is_tty, CHAN_SES_WINDOW_DEFAULT);
+	if (options.hpn_disabled)
+		channel_set_fds(s->chanid, fdout, fdin, fderr,
+		    ignore_fderr ? CHAN_EXTENDED_IGNORE : CHAN_EXTENDED_READ,
+		    1, is_tty, CHAN_SES_WINDOW_DEFAULT);
+	else
+		channel_set_fds(s->chanid, fdout, fdin, fderr,
+		    ignore_fderr ? CHAN_EXTENDED_IGNORE : CHAN_EXTENDED_READ,
+		    1, is_tty, options.hpn_buffer_size);
 }
 
 /*
Index: servconf.c
===================================================================
--- servconf.c	(revision 223657)
+++ servconf.c	(working copy)
@@ -1,4 +1,5 @@
 /* $OpenBSD: servconf.c,v 1.213 2010/11/13 23:27:50 djm Exp $ */
+/* $FreeBSD$ */
 /*
  * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
  *                    All rights reserved
@@ -141,6 +142,12 @@
 	options->authorized_principals_file = NULL;
 	options->ip_qos_interactive = -1;
 	options->ip_qos_bulk = -1;
+	options->hpn_disabled = -1;
+	options->hpn_buffer_size = -1;
+	options->tcp_rcv_buf_poll = -1;
+#ifdef	NONE_CIPHER_ENABLED
+	options->none_enabled = -1;
+#endif
 }
 
 void
@@ -283,7 +290,38 @@
 		options->ip_qos_interactive = IPTOS_LOWDELAY;
 	if (options->ip_qos_bulk == -1)
 		options->ip_qos_bulk = IPTOS_THROUGHPUT;
+	if (options->hpn_disabled == -1) 
+		options->hpn_disabled = 0;
+	if (options->hpn_buffer_size == -1) {
+		/*
+		 * HPN buffer size option not explicitly set.  Try to figure
+		 * out what value to use or resort to default.
+		 */
+		options->hpn_buffer_size = CHAN_SES_WINDOW_DEFAULT;
+		if (!options->hpn_disabled) {
+			sock_get_rcvbuf(&options->hpn_buffer_size, 0);
+			debug ("HPN Buffer Size: %d", options->hpn_buffer_size);
+		}
+	} else {
+		/*
+		 * In the case that the user sets both values in a
+		 * contradictory manner hpn_disabled overrrides hpn_buffer_size.
+		 */
+		if (options->hpn_disabled <= 0) {
+			u_int maxlen;
 
+			maxlen = buffer_get_max_len();
+			if (options->hpn_buffer_size == 0)
+				options->hpn_buffer_size = 1;
+			/* Limit the maximum buffer to BUFFER_MAX_LEN. */
+			if (options->hpn_buffer_size > maxlen / 1024)
+				options->hpn_buffer_size = maxlen;
+			else
+				options->hpn_buffer_size *= 1024;
+		} else
+			options->hpn_buffer_size = CHAN_TCP_WINDOW_DEFAULT;
+	}
+
 	/* Turn privilege separation on by default */
 	if (use_privsep == -1)
 		use_privsep = 1;
@@ -330,6 +368,10 @@
 	sZeroKnowledgePasswordAuthentication, sHostCertificate,
 	sRevokedKeys, sTrustedUserCAKeys, sAuthorizedPrincipalsFile,
 	sKexAlgorithms, sIPQoS,
+	sHPNDisabled, sHPNBufferSize, sTcpRcvBufPoll,
+#ifdef NONE_CIPHER_ENABLED
+	sNoneEnabled,
+#endif
 	sVersionAddendum,
 	sDeprecated, sUnsupported
 } ServerOpCodes;
@@ -455,6 +497,12 @@
 	{ "authorizedprincipalsfile", sAuthorizedPrincipalsFile, SSHCFG_ALL },
 	{ "kexalgorithms", sKexAlgorithms, SSHCFG_GLOBAL },
 	{ "ipqos", sIPQoS, SSHCFG_ALL },
+	{ "hpndisabled", sHPNDisabled, SSHCFG_ALL },
+	{ "hpnbuffersize", sHPNBufferSize, SSHCFG_ALL },
+	{ "tcprcvbufpoll", sTcpRcvBufPoll, SSHCFG_ALL },
+#ifdef NONE_CIPHER_ENABLED
+	{ "noneenabled", sNoneEnabled, SSHCFG_ALL },
+#endif
 	{ "versionaddendum", sVersionAddendum, SSHCFG_GLOBAL },
 	{ NULL, sBadOption, 0 }
 };
@@ -1409,6 +1457,24 @@
 		} while (arg != NULL && *arg != '\0');
 		break;
 
+	case sHPNDisabled:
+		intptr = &options->hpn_disabled;
+		goto parse_flag;
+
+	case sHPNBufferSize:
+		intptr = &options->hpn_buffer_size;
+		goto parse_int;
+
+	case sTcpRcvBufPoll:
+		intptr = &options->tcp_rcv_buf_poll;
+		goto parse_flag;
+
+#ifdef	NONE_CIPHER_ENABLED
+	case sNoneEnabled:
+		intptr = &options->none_enabled;
+		goto parse_flag;
+#endif
+
 	case sDeprecated:
 		logit("%s line %d: Deprecated option %s",
 		    filename, linenum, arg);
Index: servconf.h
===================================================================
--- servconf.h	(revision 223657)
+++ servconf.h	(working copy)
@@ -1,4 +1,5 @@
 /* $OpenBSD: servconf.h,v 1.95 2010/11/13 23:27:50 djm Exp $ */
+/* $OpenBSD$ */
 
 /*
  * Author: Tatu Ylonen <ylo@cs.hut.fi>
@@ -160,6 +161,15 @@
 	char   *revoked_keys_file;
 	char   *trusted_user_ca_keys;
 	char   *authorized_principals_file;
+
+	int	hpn_disabled;		/* Disable HPN functionality. */
+	int	hpn_buffer_size;	/* Set HPN buffer size - default 2MB.*/
+	int	tcp_rcv_buf_poll;	/* Poll TCP rcv window in autotuning
+					 * kernels. */
+
+#ifdef	NONE_CIPHER_ENABLED
+	int	none_enabled;		/* Enable NONE cipher switch. */
+#endif
 }       ServerOptions;
 
 void	 initialize_server_options(ServerOptions *);
Index: misc.c
===================================================================
--- misc.c	(revision 223657)
+++ misc.c	(working copy)
@@ -1,4 +1,5 @@
 /* $OpenBSD: misc.c,v 1.84 2010/11/21 01:01:13 djm Exp $ */
+/* $FreeBSD$ */
 /*
  * Copyright (c) 2000 Markus Friedl.  All rights reserved.
  * Copyright (c) 2005,2006 Damien Miller.  All rights reserved.
@@ -996,3 +997,34 @@
 		error("setsockopt IPV6_V6ONLY: %s", strerror(errno));
 #endif
 }
+
+void
+sock_get_rcvbuf(int *size, int rcvbuf)
+{
+	int sock, socksize;
+	socklen_t socksizelen = sizeof(socksize);
+
+	/*
+	 * Create a socket but do not connect it.  We use it
+	 * only to get the rcv socket size.
+	 */
+	sock = socket(AF_INET6, SOCK_STREAM, 0);
+	if (sock < 0)
+		sock = socket(AF_INET, SOCK_STREAM, 0);
+	if (sock < 0)
+		return;
+
+	/*
+	 * If the tcp_rcv_buf option is set and passed in, attempt to set the
+	 *  buffer size to its value.
+	 */
+	if (rcvbuf)
+		setsockopt(sock, SOL_SOCKET, SO_RCVBUF, (void *)&rcvbuf,
+		    sizeof(rcvbuf));
+
+	if (getsockopt(sock, SOL_SOCKET, SO_RCVBUF,
+	    &socksize, &socksizelen) == 0)
+		if (size != NULL)
+			*size = socksize;
+	close(sock);
+}
Index: misc.h
===================================================================
--- misc.h	(revision 223657)
+++ misc.h	(working copy)
@@ -1,4 +1,5 @@
 /* $OpenBSD: misc.h,v 1.47 2010/11/21 01:01:13 djm Exp $ */
+/* $FreeBSD$ */
 
 /*
  * Author: Tatu Ylonen <ylo@cs.hut.fi>
@@ -36,6 +37,7 @@
 void	 ms_subtract_diff(struct timeval *, int *);
 void	 ms_to_timeval(struct timeval *, int);
 void	 sock_set_v6only(int);
+void	 sock_get_rcvbuf(int *, int);
 
 struct passwd *pwcopy(struct passwd *);
 const char *ssh_gai_strerror(int);
Index: cipher.c
===================================================================
--- cipher.c	(revision 223657)
+++ cipher.c	(working copy)
@@ -1,4 +1,5 @@
 /* $OpenBSD: cipher.c,v 1.82 2009/01/26 09:58:15 markus Exp $ */
+/* $FreeBSD$ */
 /*
  * Author: Tatu Ylonen <ylo@cs.hut.fi>
  * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
@@ -163,7 +164,12 @@
 	for ((p = strsep(&cp, CIPHER_SEP)); p && *p != '\0';
 	    (p = strsep(&cp, CIPHER_SEP))) {
 		c = cipher_by_name(p);
-		if (c == NULL || c->number != SSH_CIPHER_SSH2) {
+#ifdef NONE_CIPHER_ENABLED
+		if (c == NULL || (c->number != SSH_CIPHER_SSH2 &&
+		    c->number != SSH_CIPHER_NONE)) {
+#else
+		if (c == NULL || (c->number != SSH_CIPHER_SSH2)) {
+#endif
 			debug("bad cipher %s [%s]", p, names);
 			xfree(cipher_list);
 			return 0;
@@ -337,6 +343,9 @@
 	int evplen;
 
 	switch (c->number) {
+#ifdef	NONE_CIPHER_ENABLED
+	case SSH_CIPHER_NONE:
+#endif
 	case SSH_CIPHER_SSH2:
 	case SSH_CIPHER_DES:
 	case SSH_CIPHER_BLOWFISH:
@@ -371,6 +380,9 @@
 	int evplen = 0;
 
 	switch (c->number) {
+#ifdef	NONE_CIPHER_ENABLED
+	case SSH_CIPHER_NONE:
+#endif
 	case SSH_CIPHER_SSH2:
 	case SSH_CIPHER_DES:
 	case SSH_CIPHER_BLOWFISH:
Index: sshd_config
===================================================================
--- sshd_config	(revision 223657)
+++ sshd_config	(working copy)
@@ -117,6 +117,18 @@
 # override default of no subsystems
 Subsystem	sftp	/usr/libexec/sftp-server
 
+# Disable HPN tuning improvements.
+#HPNDisabled no
+
+# Buffer size for HPN to non-HPN connections.
+#HPNBufferSize 2048
+
+# TCP receive socket buffer polling for HPN.  Disable on non autotuning kernels.
+#TcpRcvBufPoll yes
+
+# Allow the use of the NONE cipher.
+#NoneEnabled no
+
 # Example of overriding settings on a per-user basis
 #Match User anoncvs
 #	X11Forwarding no
Index: clientloop.c
===================================================================
--- clientloop.c	(revision 223657)
+++ clientloop.c	(working copy)
@@ -1,4 +1,5 @@
 /* $OpenBSD: clientloop.c,v 1.231 2011/01/16 12:05:59 djm Exp $ */
+/* $FreeBSD$ */
 /*
  * Author: Tatu Ylonen <ylo@cs.hut.fi>
  * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
@@ -1768,9 +1769,14 @@
 	sock = x11_connect_display();
 	if (sock < 0)
 		return NULL;
-	c = channel_new("x11",
-	    SSH_CHANNEL_X11_OPEN, sock, sock, -1,
-	    CHAN_TCP_WINDOW_DEFAULT, CHAN_X11_PACKET_DEFAULT, 0, "x11", 1);
+	if (options.hpn_disabled)
+		c = channel_new("x11", SSH_CHANNEL_X11_OPEN, sock, sock, -1,
+		    CHAN_TCP_WINDOW_DEFAULT, CHAN_X11_PACKET_DEFAULT,
+		    0, "x11", 1);
+	else
+		c = channel_new("x11", SSH_CHANNEL_X11_OPEN, sock, sock, -1,
+		    options.hpn_buffer_size, CHAN_X11_PACKET_DEFAULT,
+		    0, "x11", 1);
 	c->force_drain = 1;
 	return c;
 }
@@ -1790,10 +1796,16 @@
 	sock = ssh_get_authentication_socket();
 	if (sock < 0)
 		return NULL;
-	c = channel_new("authentication agent connection",
-	    SSH_CHANNEL_OPEN, sock, sock, -1,
-	    CHAN_X11_WINDOW_DEFAULT, CHAN_TCP_PACKET_DEFAULT, 0,
-	    "authentication agent connection", 1);
+	if (options.hpn_disabled)
+		c = channel_new("authentication agent connection",
+		    SSH_CHANNEL_OPEN, sock, sock, -1,
+		    CHAN_X11_WINDOW_DEFAULT, CHAN_TCP_WINDOW_DEFAULT, 0,
+		    "authentication agent connection", 1);
+	else
+		c = channel_new("authentication agent connection",
+		    SSH_CHANNEL_OPEN, sock, sock, -1,
+		    options.hpn_buffer_size, options.hpn_buffer_size, 0,
+		    "authentication agent connection", 1);
 	c->force_drain = 1;
 	return c;
 }
@@ -1820,8 +1832,14 @@
 		return -1;
 	}
 
-	c = channel_new("tun", SSH_CHANNEL_OPENING, fd, fd, -1,
-	    CHAN_TCP_WINDOW_DEFAULT, CHAN_TCP_PACKET_DEFAULT, 0, "tun", 1);
+	if (options.hpn_disabled)
+		c = channel_new("tun", SSH_CHANNEL_OPENING, fd, fd, -1,
+		    CHAN_TCP_WINDOW_DEFAULT, CHAN_TCP_PACKET_DEFAULT,
+		    0, "tun", 1);
+	else
+		c = channel_new("tun", SSH_CHANNEL_OPENING, fd, fd, -1,
+		    options.hpn_buffer_size, CHAN_TCP_PACKET_DEFAULT,
+		    0, "tun", 1);
 	c->datagram = 1;
 
 #if defined(SSH_TUN_FILTER)
Index: version.c
===================================================================
--- version.c	(revision 223657)
+++ version.c	(working copy)
@@ -40,7 +40,7 @@
 ssh_version_get(void) {
 
 	if (version == NULL)
-		version = xstrdup(SSH_VERSION_BASE " " SSH_VERSION_ADDENDUM);
+		version = xstrdup(SSH_VERSION);
 	return (version);
 }
 
@@ -50,11 +50,13 @@
 	size_t size;
 
 	if (add != NULL) {
-		size = strlen(SSH_VERSION_BASE) + 1 + strlen(add) + 1;
+		size = strlen(SSH_VERSION_BASE) + strlen(SSH_VERSION_HPN) + 1 +
+		    strlen(add) + 1;
 		newvers = xmalloc(size);
-		snprintf(newvers, size, "%s %s", SSH_VERSION_BASE, add);
+		snprintf(newvers, size, "%s %s", SSH_VERSION_BASE,
+		    SSH_VERSION_HPN, add);
 	} else {
-		newvers = xstrdup(SSH_VERSION_BASE);
+		newvers = xstrdup(SSH_VERSION_BASE SSH_VERSION_HPN);
 	}
 	if (version != NULL)
 		xfree(version);
Index: version.h
===================================================================
--- version.h	(revision 223657)
+++ version.h	(working copy)
@@ -3,10 +3,11 @@
 
 #ifndef SSH_VERSION
 
-#define SSH_VERSION             (ssh_version_get())
-#define SSH_RELEASE             (ssh_version_get())
 #define SSH_VERSION_BASE        "OpenSSH_5.8p2"
 #define SSH_VERSION_ADDENDUM    "FreeBSD-20110503"
+#define SSH_VERSION_HPN		"_hpn13v11"
+#define SSH_VERSION		SSH_VERSION_BASE SSH_VERSION_HPN " " SSH_VERSION_ADDENDUM
+#define SSH_RELEASE             (ssh_version_get())
 
 const char *ssh_version_get(void);
 void ssh_version_set_addendum(const char *);
Index: serverloop.c
===================================================================
--- serverloop.c	(revision 223657)
+++ serverloop.c	(working copy)
@@ -1,4 +1,5 @@
 /* $OpenBSD: serverloop.c,v 1.159 2009/05/28 16:50:16 andreas Exp $ */
+/* $FreeBSD$ */
 /*
  * Author: Tatu Ylonen <ylo@cs.hut.fi>
  * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
@@ -726,7 +727,7 @@
 	/* Wait until all output has been sent to the client. */
 	drain_output();
 
-	debug("End of interactive session; stdin %ld, stdout (read %ld, sent %ld), stderr %ld bytes.",
+	debug("End of interactive session; stdin %ld, stdout (read %ld, " "sent %ld), stderr %ld bytes.",
 	    stdin_bytes, fdout_bytes, stdout_bytes, stderr_bytes);
 
 	/* Free and clear the buffers. */
@@ -998,8 +999,14 @@
 	sock = tun_open(tun, mode);
 	if (sock < 0)
 		goto done;
-	c = channel_new("tun", SSH_CHANNEL_OPEN, sock, sock, -1,
-	    CHAN_TCP_WINDOW_DEFAULT, CHAN_TCP_PACKET_DEFAULT, 0, "tun", 1);
+	if (options.hpn_disabled)
+		c = channel_new("tun", SSH_CHANNEL_OPEN, sock, sock, -1,
+		    CHAN_TCP_WINDOW_DEFAULT, CHAN_TCP_PACKET_DEFAULT, 0,
+		    "tun", 1);
+	else
+		c = channel_new("tun", SSH_CHANNEL_OPEN, sock, sock, -1,
+		    options.hpn_buffer_size, CHAN_TCP_PACKET_DEFAULT, 0,
+		    "tun", 1);
 	c->datagram = 1;
 #if defined(SSH_TUN_FILTER)
 	if (mode == SSH_TUNMODE_POINTOPOINT)
@@ -1035,6 +1042,8 @@
 	c = channel_new("session", SSH_CHANNEL_LARVAL,
 	    -1, -1, -1, /*window size*/0, CHAN_SES_PACKET_DEFAULT,
 	    0, "server-session", 1);
+	if (!options.hpn_disabled && options.tcp_rcv_buf_poll)
+		c->dynamic_window = 1;
 	if (session_open(the_authctxt, c->self) != 1) {
 		debug("session open failed, free channel %d", c->self);
 		channel_free(c);
Index: packet.c
===================================================================
--- packet.c	(revision 223657)
+++ packet.c	(working copy)
@@ -1,4 +1,5 @@
 /* $OpenBSD: packet.c,v 1.172 2010/11/13 23:27:50 djm Exp $ */
+/* $FreeBSD$ */
 /*
  * Author: Tatu Ylonen <ylo@cs.hut.fi>
  * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
@@ -195,6 +196,9 @@
 };
 
 static struct session_state *active_state, *backup_state;
+#ifdef	NONE_CIPHER_ENABLED
+static int rekey_requested = 0;
+#endif
 
 static struct session_state *
 alloc_session_state(void)
@@ -1861,12 +1865,26 @@
 	}
 }
 
+#ifdef	NONE_CIPHER_ENABLED
+void
+packet_request_rekeying(void)
+{
+	rekey_requested = 1;
+}
+#endif
+
 #define MAX_PACKETS	(1U<<31)
 int
 packet_need_rekeying(void)
 {
 	if (datafellows & SSH_BUG_NOREKEY)
 		return 0;
+#ifdef	NONE_CIPHER_ENABLED
+	if (rekey_requested == 1) {
+		rekey_requested = 0;
+		return 1;
+	}
+#endif
 	return
 	    (active_state->p_send.packets > MAX_PACKETS) ||
 	    (active_state->p_read.packets > MAX_PACKETS) ||
@@ -1958,3 +1976,11 @@
 		add_recv_bytes(len);
 	}
 }
+
+#ifdef	NONE_CIPHER_ENABLED
+int
+packet_get_authentication_state(void)
+{
+	return (active_state->after_authentication);
+}
+#endif
Index: packet.h
===================================================================
--- packet.h	(revision 223657)
+++ packet.h	(working copy)
@@ -1,4 +1,5 @@
 /* $OpenBSD: packet.h,v 1.55 2010/11/13 23:27:50 djm Exp $ */
+/* $FreeBSD$ */
 
 /*
  * Author: Tatu Ylonen <ylo@cs.hut.fi>
@@ -38,6 +39,9 @@
 int      packet_is_interactive(void);
 void     packet_set_server(void);
 void     packet_set_authenticated(void);
+#ifdef	NONE_CIPHER_ENABLED
+int      packet_get_authentication_state(void);
+#endif
 
 void     packet_start(u_char);
 void     packet_put_char(int ch);
@@ -117,6 +121,9 @@
 } while (0)
 
 int	 packet_need_rekeying(void);
+#ifdef	NONE_CIPHER_ENABLED
+void	 packet_request_rekeying(void);
+#endif
 void	 packet_set_rekey_limit(u_int32_t);
 
 void	 packet_backup_state(void);
Index: readconf.c
===================================================================
--- readconf.c	(revision 223657)
+++ readconf.c	(working copy)
@@ -1,4 +1,5 @@
 /* $OpenBSD: readconf.c,v 1.190 2010/11/13 23:27:50 djm Exp $ */
+/* $FreeBSD$ */
 /*
  * Author: Tatu Ylonen <ylo@cs.hut.fi>
  * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
@@ -138,6 +139,10 @@
 	oTunnel, oTunnelDevice, oLocalCommand, oPermitLocalCommand,
 	oVisualHostKey, oUseRoaming, oZeroKnowledgePasswordAuthentication,
 	oKexAlgorithms, oIPQoS,
+	oHPNDisabled, oHPNBufferSize, oTcpRcvBufPoll, oTcpRcvBuf,
+#ifdef NONE_CIPHER_ENABLED
+	oNoneEnabled, oNoneSwitch,
+#endif
 	oVersionAddendum,
 	oDeprecated, oUnsupported
 } OpCodes;
@@ -249,6 +254,14 @@
 #endif
 	{ "kexalgorithms", oKexAlgorithms },
 	{ "ipqos", oIPQoS },
+	{ "hpndisabled", oHPNDisabled },
+	{ "hpnbuffersize", oHPNBufferSize },
+	{ "tcprcvbufpoll", oTcpRcvBufPoll },
+	{ "tcprcvbuf", oTcpRcvBuf },
+#ifdef	NONE_CIPHER_ENABLED
+	{ "noneenabled", oNoneEnabled },
+	{ "noneswitch", oNoneSwitch },
+#endif
 
 	{ "versionaddendum", oVersionAddendum },
 	{ NULL, oBadOption }
@@ -1021,6 +1034,47 @@
 		} while (arg != NULL && *arg != '\0');
 		break;
 
+	case oHPNDisabled:
+		intptr = &options->hpn_disabled;
+		goto parse_flag;
+
+	case oHPNBufferSize:
+		intptr = &options->hpn_buffer_size;
+		goto parse_int;
+
+	case oTcpRcvBufPoll:
+		intptr = &options->tcp_rcv_buf_poll;
+		goto parse_flag;
+
+	case oTcpRcvBuf:
+		intptr = &options->tcp_rcv_buf;
+		goto parse_int;
+
+#ifdef	NONE_CIPHER_ENABLED
+	case oNoneEnabled:
+		intptr = &options->none_enabled;
+		goto parse_flag;
+ 
+	/*
+         * We check to see if the command comes from the command line or not.
+	 * If it does then enable it otherwise fail.  NONE must never be a
+	 * default configuration.
+	 */
+	case oNoneSwitch:
+		if (strcmp(filename,"command-line") == 0) {
+			intptr = &options->none_switch;
+			goto parse_flag;
+		} else {
+			debug("NoneSwitch directive found in %.200s.",
+			    filename);
+			error("NoneSwitch is found in %.200s.\n"
+			    "You may only use this configuration option "
+			    "from the command line", filename);
+			error("Continuing...");
+			return 0;
+	        }
+#endif
+
 	case oDeprecated:
 		debug("%s line %d: Deprecated option \"%s\"",
 		    filename, linenum, keyword);
@@ -1181,6 +1235,14 @@
 	options->zero_knowledge_password_authentication = -1;
 	options->ip_qos_interactive = -1;
 	options->ip_qos_bulk = -1;
+	options->hpn_disabled = -1;
+	options->hpn_buffer_size = -1;
+	options->tcp_rcv_buf_poll = -1;
+	options->tcp_rcv_buf = -1;
+#ifdef NONE_CIPHER_ENABLED
+	options->none_enabled = -1;
+	options->none_switch = -1;
+#endif
 }
 
 /*
@@ -1345,6 +1407,36 @@
 	/* options->hostname will be set in the main program if appropriate */
 	/* options->host_key_alias should not be set by default */
 	/* options->preferred_authentications will be set in ssh */
+	if (options->hpn_disabled == -1)
+	        options->hpn_disabled = 0;
+	if (options->hpn_buffer_size > -1)
+	{
+		u_int maxlen;
+
+		/* If a user tries to set the size to 0 set it to 1KB. */
+		if (options->hpn_buffer_size == 0)
+			options->hpn_buffer_size = 1024;
+		/* Limit the buffer to BUFFER_MAX_LEN. */
+		maxlen = buffer_get_max_len();
+		if (options->hpn_buffer_size > (maxlen / 1024)) {
+			debug("User requested buffer larger than %ub: %ub. "
+			    "Request reverted to %ub", maxlen,
+			    options->hpn_buffer_size * 1024, maxlen);
+			options->hpn_buffer_size = maxlen;
+		}
+		debug("hpn_buffer_size set to %d", options->hpn_buffer_size);
+	}
+	if (options->tcp_rcv_buf == 0)
+		options->tcp_rcv_buf = 1;
+	if (options->tcp_rcv_buf > -1) 
+		options->tcp_rcv_buf *= 1024;
+	if (options->tcp_rcv_buf_poll == -1)
+		options->tcp_rcv_buf_poll = 1;
+#ifdef	NONE_CIPHER_ENABLED
+	/* options->none_enabled must not be set by default */
+	if (options->none_switch == -1)
+		options->none_switch = 0;
+#endif
 }
 
 /*
Index: readconf.h
===================================================================
--- readconf.h	(revision 223657)
+++ readconf.h	(working copy)
@@ -1,4 +1,5 @@
 /* $OpenBSD: readconf.h,v 1.88 2010/11/13 23:27:50 djm Exp $ */
+/* $FreeBSD$ */
 
 /*
  * Author: Tatu Ylonen <ylo@cs.hut.fi>
@@ -132,6 +133,17 @@
 
 	int	use_roaming;
 
+	int	hpn_disabled;	/* Switch to disable HPN buffer management. */
+	int	hpn_buffer_size;	/* User definable size for HPN buffer
+					 * window. */
+	int	tcp_rcv_buf_poll;	/* Option to poll recv buf every window
+					 * transfer. */
+	int	tcp_rcv_buf;	/* User switch to set tcp recv buffer. */
+
+#ifdef	NONE_CIPHER_ENABLED
+	int	none_enabled;	/* Allow none to be used */
+	int	none_switch;	/* Use none cipher */
+#endif
 }       Options;
 
 #define SSHCTL_MASTER_NO	0
Index: channels.c
===================================================================
--- channels.c	(revision 223657)
+++ channels.c	(working copy)
@@ -1,4 +1,5 @@
 /* $OpenBSD: channels.c,v 1.310 2010/11/24 01:24:14 djm Exp $ */
+/* $FreeBSD$ */
 /*
  * Author: Tatu Ylonen <ylo@cs.hut.fi>
  * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
@@ -170,6 +171,11 @@
 static int connect_next(struct channel_connect *);
 static void channel_connect_ctx_free(struct channel_connect *);
 
+/* -- HPN */
+
+static int hpn_disabled = 0;
+static u_int buffer_size = CHAN_HPN_MIN_WINDOW_DEFAULT;
+
 /* -- channel core */
 
 Channel *
@@ -309,6 +315,7 @@
 	c->self = found;
 	c->type = type;
 	c->ctype = ctype;
+	c->dynamic_window = 0;
 	c->local_window = window;
 	c->local_window_max = window;
 	c->local_consumed = 0;
@@ -808,11 +815,46 @@
 		FD_SET(c->sock, writeset);
 }
 
+static u_int
+channel_tcpwinsz(void)
+{
+	u_int32_t tcpwinsz;
+	socklen_t optsz;
+	int ret, sd;
+	u_int maxlen;
+
+	/* If we are not on a socket return 128KB. */
+	if (!packet_connection_is_on_socket()) 
+		return (128 * 1024);
+
+	tcpwinsz = 0;
+	optsz = sizeof(tcpwinsz);
+	sd = packet_get_connection_in();
+	ret = getsockopt(sd, SOL_SOCKET, SO_RCVBUF, &tcpwinsz, &optsz);
+
+	/* Return no more than the maximum buffer size. */
+	maxlen = buffer_get_max_len();
+	if ((ret == 0) && tcpwinsz > maxlen)
+		tcpwinsz = maxlen;
+	/* In case getsockopt() failed return a minimum. */
+	if (tcpwinsz == 0)
+		tcpwinsz = CHAN_TCP_WINDOW_DEFAULT;
+	debug2("tcpwinsz: %d for connection: %d", tcpwinsz, sd);
+	return (tcpwinsz);
+}
+
 static void
 channel_pre_open(Channel *c, fd_set *readset, fd_set *writeset)
 {
-	u_int limit = compat20 ? c->remote_window : packet_get_maxsize();
+	u_int limit;
 
+	/* Check buffer limits. */
+	if (!c->tcpwinsz || c->dynamic_window > 0)
+		c->tcpwinsz = channel_tcpwinsz();
+
+	limit = MIN(compat20 ? c->remote_window : packet_get_maxsize(),
+	    2 * c->tcpwinsz);
+	
 	if (c->istate == CHAN_INPUT_OPEN &&
 	    limit > 0 &&
 	    buffer_len(&c->input) < limit &&
@@ -1789,14 +1831,25 @@
 	    c->local_maxpacket*3) ||
 	    c->local_window < c->local_window_max/2) &&
 	    c->local_consumed > 0) {
+		u_int addition = 0;
+
+		/* Adjust max window size if we are in a dynamic environment. */
+		if (c->dynamic_window && c->tcpwinsz > c->local_window_max) {
+			/*
+			 * Grow the window somewhat aggressively to maintain
+			 * pressure.
+			 */
+			addition = 1.5 * (c->tcpwinsz - c->local_window_max);
+			c->local_window_max += addition;
+		}
 		packet_start(SSH2_MSG_CHANNEL_WINDOW_ADJUST);
 		packet_put_int(c->remote_id);
-		packet_put_int(c->local_consumed);
+		packet_put_int(c->local_consumed + addition);
 		packet_send();
 		debug2("channel %d: window %d sent adjust %d",
 		    c->self, c->local_window,
 		    c->local_consumed);
-		c->local_window += c->local_consumed;
+		c->local_window += c->local_consumed + addition;
 		c->local_consumed = 0;
 	}
 	return 1;
@@ -2634,6 +2687,15 @@
 	IPv4or6 = af;
 }
 
+void 
+channel_set_hpn(int disabled, u_int buf_size)
+{
+      	hpn_disabled = disabled;
+	buffer_size = buf_size;
+	debug("HPN Disabled: %d, HPN Buffer Size: %d",
+	    hpn_disabled, buffer_size);
+}
+
 static int
 channel_setup_fwd_listener(int type, const char *listen_addr,
     u_short listen_port, int *allocated_listen_port,
@@ -2786,10 +2848,18 @@
 			    *allocated_listen_port);
 		}
 
-		/* Allocate a channel number for the socket. */
-		c = channel_new("port listener", type, sock, sock, -1,
-		    CHAN_TCP_WINDOW_DEFAULT, CHAN_TCP_PACKET_DEFAULT,
-		    0, "port listener", 1);
+		/*
+		 * Allocate a channel number for the socket.  Explicitly test
+		 * for hpn disabled option.  If true use smaller window size.
+		 */
+		if (hpn_disabled)
+			c = channel_new("port listener", type, sock, sock, -1,
+			    CHAN_TCP_WINDOW_DEFAULT, CHAN_TCP_PACKET_DEFAULT,
+			    0, "port listener", 1);
+ 		else
+ 			c = channel_new("port listener", type, sock, sock, -1,
+ 		    	    buffer_size, CHAN_TCP_PACKET_DEFAULT,
+ 		    	    0, "port listener", 1);
 		c->path = xstrdup(host);
 		c->host_port = port_to_connect;
 		c->listening_port = listen_port;
@@ -3334,10 +3404,16 @@
 	*chanids = xcalloc(num_socks + 1, sizeof(**chanids));
 	for (n = 0; n < num_socks; n++) {
 		sock = socks[n];
-		nc = channel_new("x11 listener",
-		    SSH_CHANNEL_X11_LISTENER, sock, sock, -1,
-		    CHAN_X11_WINDOW_DEFAULT, CHAN_X11_PACKET_DEFAULT,
-		    0, "X11 inet listener", 1);
+		if (hpn_disabled)
+			nc = channel_new("x11 listener",
+			    SSH_CHANNEL_X11_LISTENER, sock, sock, -1,
+			    CHAN_X11_WINDOW_DEFAULT, CHAN_X11_PACKET_DEFAULT,
+			    0, "X11 inet listener", 1);
+		else
+			nc = channel_new("x11 listener",
+			    SSH_CHANNEL_X11_LISTENER, sock, sock, -1,
+			    buffer_size, CHAN_X11_PACKET_DEFAULT,
+			    0, "X11 inet listener", 1);
 		nc->single_connection = single_connection;
 		(*chanids)[n] = nc->self;
 	}
Index: channels.h
===================================================================
--- channels.h	(revision 223657)
+++ channels.h	(working copy)
@@ -1,4 +1,5 @@
 /* $OpenBSD: channels.h,v 1.104 2010/05/14 23:29:23 djm Exp $ */
+/* $FreeBSD$ */
 
 /*
  * Author: Tatu Ylonen <ylo@cs.hut.fi>
@@ -125,6 +126,8 @@
 	u_int	local_window_max;
 	u_int	local_consumed;
 	u_int	local_maxpacket;
+	u_int 	tcpwinsz;	
+	int	dynamic_window;
 	int     extended_usage;
 	int	single_connection;
 
@@ -162,11 +165,15 @@
 /* default window/packet sizes for tcp/x11-fwd-channel */
 #define CHAN_SES_PACKET_DEFAULT	(32*1024)
 #define CHAN_SES_WINDOW_DEFAULT	(64*CHAN_SES_PACKET_DEFAULT)
+
 #define CHAN_TCP_PACKET_DEFAULT	(32*1024)
 #define CHAN_TCP_WINDOW_DEFAULT	(64*CHAN_TCP_PACKET_DEFAULT)
+
 #define CHAN_X11_PACKET_DEFAULT	(16*1024)
 #define CHAN_X11_WINDOW_DEFAULT	(4*CHAN_X11_PACKET_DEFAULT)
 
+#define CHAN_HPN_MIN_WINDOW_DEFAULT	(2*1024*1024)
+
 /* possible input states */
 #define CHAN_INPUT_OPEN			0
 #define CHAN_INPUT_WAIT_DRAIN		1
@@ -294,4 +301,7 @@
 void	 chan_write_failed(Channel *);
 void	 chan_obuf_empty(Channel *);
 
+/* hpn handler */
+void     channel_set_hpn(int, u_int);
+
 #endif
Index: kex.c
===================================================================
--- kex.c	(revision 223657)
+++ kex.c	(working copy)
@@ -1,4 +1,5 @@
 /* $OpenBSD: kex.c,v 1.86 2010/09/22 05:01:29 djm Exp $ */
+/* $FreeBSD$ */
 /*
  * Copyright (c) 2000, 2001 Markus Friedl.  All rights reserved.
  *
@@ -90,8 +91,13 @@
 	return 1;
 }
 
-/* put algorithm proposal into buffer */
+/* Put algorithm proposal into buffer. */
+#ifndef NONE_CIPHER_ENABLED
 static void
+#else
+/* Also used in sshconnect2.c. */
+void
+#endif
 kex_prop2buf(Buffer *b, char *proposal[PROPOSAL_MAX])
 {
 	u_int i;
@@ -407,6 +413,9 @@
 	int nenc, nmac, ncomp;
 	u_int mode, ctos, need;
 	int first_kex_follows, type;
+#ifdef	NONE_CIPHER_ENABLED
+	int auth_flag;
+#endif
 
 	my   = kex_buf2prop(&kex->my, NULL);
 	peer = kex_buf2prop(&kex->peer, &first_kex_follows);
@@ -430,6 +439,10 @@
 	}
 
 	/* Algorithm Negotiation */
+#ifdef	NONE_CIPHER_ENABLED
+	auth_flag = packet_get_authentication_state();
+	debug ("AUTH STATE is %d", auth_flag);
+#endif
 	for (mode = 0; mode < MODE_MAX; mode++) {
 		newkeys = xcalloc(1, sizeof(*newkeys));
 		kex->newkeys[mode] = newkeys;
@@ -441,6 +454,17 @@
 		choose_enc (&newkeys->enc,  cprop[nenc],  sprop[nenc]);
 		choose_mac (&newkeys->mac,  cprop[nmac],  sprop[nmac]);
 		choose_comp(&newkeys->comp, cprop[ncomp], sprop[ncomp]);
+#ifdef	NONE_CIPHER_ENABLED
+		debug("REQUESTED ENC.NAME is '%s'", newkeys->enc.name);
+		if (strcmp(newkeys->enc.name, "none") == 0) {
+			debug("Requesting NONE. Authflag is %d", auth_flag);			
+			if (auth_flag == 1)
+				debug("None requested post authentication.");
+			else
+				fatal("Pre-authentication none cipher requests "
+				    "are not allowed.");
+		} 
+#endif
 		debug("kex: %s %s %s %s",
 		    ctos ? "client->server" : "server->client",
 		    newkeys->enc.name,
Index: kex.h
===================================================================
--- kex.h	(revision 223657)
+++ kex.h	(working copy)
@@ -1,4 +1,5 @@
 /* $OpenBSD: kex.h,v 1.52 2010/09/22 05:01:29 djm Exp $ */
+/* $FreeBSD$ */
 
 /*
  * Copyright (c) 2000, 2001 Markus Friedl.  All rights reserved.
@@ -140,6 +141,10 @@
 
 int	 kex_names_valid(const char *);
 
+#ifdef	NONE_CIPHER_ENABLED
+void	 kex_prop2buf(Buffer *, char *[PROPOSAL_MAX]);
+#endif
+
 Kex	*kex_setup(char *[PROPOSAL_MAX]);
 void	 kex_finish(Kex *);