From e02505e259b9d5f1c2e36144917847efd0a1ad53 Mon Sep 17 00:00:00 2001
From: dtucker <dtucker>
Date: Fri, 23 Jun 2006 11:05:12 +0000
Subject: [PATCH]  - (dtucker) [README.platform configure.ac
 openbsd-compat/port-tun.c] Add    tunnel support for Mac OS X/Darwin via a
 third-party tun driver.  Patch    from reyk@, tested by anil@

---
 ChangeLog                 |  5 +++++
 INSTALL                   | 10 ++++++----
 README.platform           | 12 ++++++++++++
 configure.ac              |  6 ++++++
 openbsd-compat/port-tun.c |  4 ++++
 5 files changed, 33 insertions(+), 4 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index 17771efb..9e9946e7 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+20060623
+ - (dtucker) [README.platform configure.ac openbsd-compat/port-tun.c] Add
+   tunnel support for Mac OS X/Darwin via a third-party tun driver.  Patch
+   from reyk@, tested by anil@
+
 20060613
  - (djm) [getput.h] This file has been replaced by functions in misc.c
  - OpenBSD CVS Sync
diff --git a/INSTALL b/INSTALL
index e3c205e6..78f3a705 100644
--- a/INSTALL
+++ b/INSTALL
@@ -57,9 +57,10 @@ installed.  No other S/Key library is currently known to be supported.
 http://www.sparc.spb.su/solaris/skey/
 
 LibEdit:
-sftp now supports command-line editing via NetBSD's libedit.  If your
-platform has it available natively you can use that, alternatively
-you might try these multi-platform ports:
+
+sftp supports command-line editing via NetBSD's libedit.  If your platform
+has it available natively you can use that, alternatively you might try
+these multi-platform ports:
 
 http://www.thrysoee.dk/editline/
 http://sourceforge.net/projects/libedit/
@@ -210,7 +211,8 @@ for sshd, ssh and ssh-agent.
 -------------------------
 
 $ make survey
-[check the contents and make sure there's no sensitive information]
+[check the contents of the file "survey" to ensure there's no information
+that you consider sensitive]
 $ make send-survey
 
 This will send configuration information for the currently configured
diff --git a/README.platform b/README.platform
index 7356c105..5724b688 100644
--- a/README.platform
+++ b/README.platform
@@ -30,6 +30,18 @@ gcc, gcc-mingw-core, mingw-runtime, binutils, make, openssl,
 openssl-devel, zlib, minres, minires-devel.
 
 
+Darwin and MacOS X
+------------------
+Darwin does not provide a tun(4) driver required for OpenSSH-based
+virtual private networks. The BSD manpage still exists, but the driver
+has been removed in recent releases of Darwin and MacOS X.
+
+Nevertheless, tunnel support is known to work with Darwin 8 and
+MacOS X 10.4 in Point-to-Point (Layer 3) and Ethernet (Layer 2) mode
+using a third party driver. More information is available at:
+	http://www-user.rhrk.uni-kl.de/~nissler/tuntap/
+
+
 Solaris
 -------
 If you enable BSM auditing on Solaris, you need to update audit_event(4)
diff --git a/configure.ac b/configure.ac
index 57725369..19e71a56 100644
--- a/configure.ac
+++ b/configure.ac
@@ -231,6 +231,11 @@ main() { if (NSVersionOfRunTimeLibrary("System") >= (60 << 16))
 	AC_DEFINE(BROKEN_SETREGID)
 	AC_DEFINE_UNQUOTED(BIND_8_COMPAT, 1,
 		[Define if your resolver libs need this for getrrsetbyname])
+	AC_DEFINE(SSH_TUN_FREEBSD, 1, [Open tunnel devices the FreeBSD way])
+	AC_DEFINE(SSH_TUN_COMPAT_AF, 1,
+	    [Use tunnel device compatibility to OpenBSD])
+	AC_DEFINE(SSH_TUN_PREPEND_AF, 1,
+	    [Prepend the address family to IP tunnel traffic])
 	;;
 *-*-hpux*)
 	# first we define all of the options common to all HP-UX releases
@@ -682,6 +687,7 @@ AC_CHECK_HEADERS( \
 	login.h \
 	maillock.h \
 	ndir.h \
+	net/if_tun.h \
 	netdb.h \
 	netgroup.h \
 	pam/pam_appl.h \
diff --git a/openbsd-compat/port-tun.c b/openbsd-compat/port-tun.c
index d09fe3d0..6e1fed96 100644
--- a/openbsd-compat/port-tun.c
+++ b/openbsd-compat/port-tun.c
@@ -29,6 +29,7 @@
  * settings.
  *
  * SSH_TUN_LINUX	Use the (newer) Linux tun/tap device
+ * SSH_TUN_FREEBSD	Use the FreeBSD tun/tap device
  * SSH_TUN_COMPAT_AF	Translate the OpenBSD address family
  * SSH_TUN_PREPEND_AF	Prepend/remove the address family
  */
@@ -96,7 +97,10 @@ sys_tun_open(int tun, int mode)
 #ifdef SSH_TUN_FREEBSD
 #include <sys/socket.h>
 #include <net/if.h>
+
+#ifdef HAVE_NET_IF_TUN_H
 #include <net/if_tun.h>
+#endif
 
 int
 sys_tun_open(int tun, int mode)
-- 
2.45.2