tun with darwin/macos x

hi,

the following patch adds ssh tun support for Darwin/MacOS X (layer 2+3).

I tested it with Darwin 8.0.1 x86 and MacOS X 10.4 Tiger PPC, I would
like to see any tests from MacOS X users.

It requires an external tun/tap driver, see below.

reyk

--- README.platform.orig 2006-02-13 20:22:04.000000000 -0800
+++ README.platform 2006-02-13 20:21:45.000000000 -0800
@@ -30,6 +30,18 @@ gcc, gcc-mingw-core, mingw-runtime, binu
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)
--- configure.orig 2006-02-13 19:16:02.000000000 -0800
+++ configure 2006-02-13 18:28:39.000000000 -0800
@@ -5285,6 +5285,21 @@ cat >>confdefs.h <<_ACEOF
#define BIND_8_COMPAT 1
_ACEOF

+
+cat >>confdefs.h <<\_ACEOF
+#define SSH_TUN_FREEBSD 1
+_ACEOF
+
+
+cat >>confdefs.h <<\_ACEOF
+#define SSH_TUN_COMPAT_AF 1
+_ACEOF
+
+
+cat >>confdefs.h <<\_ACEOF
+#define SSH_TUN_PREPEND_AF 1
+_ACEOF
+
;;
*-*-hpux*)
# first we define all of the options common to all HP-UX releases
--- configure.ac.orig 2006-02-13 20:25:27.000000000 -0800
+++ configure.ac 2006-02-13 20:25:48.000000000 -0800
@@ -231,6 +231,11 @@ main() { if (NSVersionOfRunTimeLibrary("
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
--- openbsd-compat/port-tun.c.orig 2006-02-13 19:16:25.000000000 -0800
+++ openbsd-compat/port-tun.c 2006-02-13 18:28:46.000000000 -0800
@@ -26,6 +26,7 @@
* 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
*/
@@ -93,7 +94,10 @@ sys_tun_open(int tun, int mode)
#ifdef SSH_TUN_FREEBSD
#include <sys/socket.h>
#include <net/if.h>
+
+#if !defined(SSH_TUN_PREPEND_AF)
#include <net/if_tun.h>
+#endif

int
sys_tun_open(int tun, int mode)

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