mingw32 patch

[David Woodhouse]

On Sat, 2013-12-21 at 13:09 +0100, Nikos Mavrogiannopoulos wrote:
> Hello,
>  Attached is a patch for openconnect to compile under mingw32. 

Thanks. All this, and a little more to update it to current HEAD, is now
committed.

> That takes care the compilation, but I'm not sure whether the tun
> handling is sufficient. 

It isn't. There's a fair amount more which needs to be done to use the
tun device under Windows. See
https://github.com/ndpgroup/vpnc/blob/master/sysdep.c#L162

We can't lift code from vpnc because OpenConnect is LGPL not GPL.
There's some Win32 tun/tap code in http://i3.cs.berkeley.edu/ and it
might be worth asking what their licence is; it's not clear.

Reimplementing it from scratch shouldn't be impossible but I probably
lack the wit to do it for myself without copying.

If I bypass that issue though, with the following patch...

diff --git a/main.c b/main.c
index 9d246b1..6c1e0fb 100644
--- a/main.c
+++ b/main.c
@@ -1020,7 +1020,7 @@ int main(int argc, char **argv)
 		}
 	} else
 #endif
-	if (openconnect_setup_tun_device(vpninfo, vpnc_script, ifname)) {
+	if (0 && openconnect_setup_tun_device(vpninfo, vpnc_script, ifname)) {
 		fprintf(stderr, _("Set up tun device failed\n"));
 		openconnect_vpninfo_free(vpninfo);
 		exit(1);

... I can make connections under wine. If I use OpenSSL I get DTLS
connections. If I use GnuTLS (Fedora's mingw32-gnutls 3.1.16 package) it
just says:

DTLS handshake failed: Error in the pull function.

(It does send a UDP packet and receive a response, but openconnect has
closed the socket before the response comes in).

The pull function isn't even being called.

-- 
dwmw2
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