disable Nagle in connect_to() and channel_post_port_listener() (port

forwarding endpoints).  the intention is to preserve the on-the-wire
appearance to applications at either end; the applications can then
enable TCP_NODELAY according to their requirements. ok markus@

2 files changed, 17 insertions, 5 deletions

diff --git a/usr.bin/ssh/channels.c b/usr.bin/ssh/channels.c
index 2daa37aeb8d..abe83e0ca9c 100644
--- a/usr.bin/ssh/channels.c
+++ b/usr.bin/ssh/channels.c
@@ -39,7 +39,7 @@
  */
 
 #include "includes.h"
-RCSID("$OpenBSD: channels.c,v 1.168 2002/02/14 23:27:59 markus Exp $");
+RCSID("$OpenBSD: channels.c,v 1.169 2002/02/24 19:59:42 stevesk Exp $");
 
 #include "ssh.h"
 #include "ssh1.h"
@@ -1116,6 +1116,7 @@ channel_post_port_listener(Channel *c, fd_set * readset, fd_set * writeset)
 			error("accept: %.100s", strerror(errno));
 			return;
 		}
+		set_nodelay(newsock);
 		nc = channel_new(rtype,
 		    nextstate, newsock, newsock, -1,
 		    c->local_window_max, c->local_maxpacket,
@@ -2264,6 +2265,7 @@ connect_to(const char *host, u_short port)
 		return -1;
 	}
 	/* success */
+	set_nodelay(sock);
 	return sock;
 }
 
diff --git a/usr.bin/ssh/misc.c b/usr.bin/ssh/misc.c
index a5447b4dacd..478e66ce5ca 100644
--- a/usr.bin/ssh/misc.c
+++ b/usr.bin/ssh/misc.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: misc.c,v 1.15 2002/01/24 21:09:25 stevesk Exp $	*/
+/*	$OpenBSD: misc.c,v 1.16 2002/02/24 19:59:42 stevesk Exp $	*/
 
 /*
  * Copyright (c) 2000 Markus Friedl.  All rights reserved.
@@ -25,7 +25,7 @@
  */
 
 #include "includes.h"
-RCSID("$OpenBSD: misc.c,v 1.15 2002/01/24 21:09:25 stevesk Exp $");
+RCSID("$OpenBSD: misc.c,v 1.16 2002/02/24 19:59:42 stevesk Exp $");
 
 #include "misc.h"
 #include "log.h"
@@ -96,10 +96,20 @@ unset_nonblock(int fd)
 void
 set_nodelay(int fd)
 {
-	int on = 1;
+	int opt, optlen;
 
+	optlen = sizeof opt;
+	if (getsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &opt, &optlen) == -1) {
+		error("getsockopt TCP_NODELAY: %.100s", strerror(errno));
+		return;
+	}
+	if (opt == 1) {
+		debug2("fd %d is TCP_NODELAY", fd);
+		return;
+	}
+	opt = 1;
 	debug("fd %d setting TCP_NODELAY", fd);
-	if (setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &on, sizeof on) == -1)
+	if (setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &opt, sizeof opt) == -1)
 		error("setsockopt TCP_NODELAY: %.100s", strerror(errno));
 }