Lion OS X tinc issues.

[Matthew Tolle]

Hi Folks,

This has been driving me nuts all day. I've been unable to google myself out of it. Maybe someone here can help?

I followed the instructions from: 

http://www.tinc-vpn.org/examples/macbook-install/

Ubuntu server <-> Ubuntu server works just fine with the same config. Ubuntu server <-> Mac laptop not so much. 

The error I'm getting is:

2012-04-10 21:48:44 tinc.l3vpn[52621]: Error while writing to Generic BSD tap device /dev/tun0: Input/output error
2012-04-10 21:48:44 tinc.l3vpn[52621]: Error while writing to Generic BSD tap device /dev/tun0: Input/output error
<lot of the same spew…>

The error pops up after I try to get DHCP going over the link. (ipconfig set tun0 DHCP). Not that it works before I try and do that. 

Both sides seems happily connected before issuing the DHCP command.

I've tried just about everything I can think of for the configs. Switch on, off, bridging on and off on the server side.. nothing seems to work. I do find it odd that under linux the virtual device looks like this: 

vpn       Link encap:Ethernet  HWaddr 4e:31:65:e7:32:f6  
          inet6 addr: fe80::4c32:66ff:fec6:32e7/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:1034 errors:0 dropped:0 overruns:0 frame:0
          TX packets:529919 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:500 
          RX bytes:87139 (87.1 KB)  TX bytes:56253688 (56.2 MB)

standard kinds of goodness. On the Mac side it seems slim on info:

tun0: flags=8851<UP,POINTOPOINT,RUNNING,SIMPLEX,MULTICAST> mtu 1500
        open (pid 57014)

Makes me think that the tun/tap device is wonky? 

The Tun/Tap stuff I got from port as per the instructions. 

Configs: 

# cat tinc.conf 
Name = laptop
Mode = switch

# cat hosts/laptop 
Subnet = 10.20.20.0/24
Address = 10.20.20.38

-----BEGIN RSA PUBLIC KEY-----
<blahblahblah>

# cat hosts/server

-----BEGIN RSA PUBLIC KEY-----
<blahblahblah>
 
I figure it's something very simple that I'm missing. Can someone save my sanity please? 

Thanks,

-Matt

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