On Thu, 23 Sep 2010 21:41:19 +0200, Matthias Guentert wrote: > I would like to create an IP tunnel using the IP protocol type 4 > (socket.IPPROTO_IPIP) on a Linux host. (I also would be happy if I > could create a GRE tunnel) > > The thing is, I just don't understand how I such a socket could be > created and then later on handled.
You don't create sockets for IPPROTO_IPIP or IPPROTO_GRE. Outside of the kernel, those identifiers are only likely to be used for specifying protocols when e.g. configuring packet filtering. Tunnelling only involves user-space for configuration. Once a tunnel has been configured, it's just a networking interface, and any traffic is handled by the kernel. Tunnel interfaces are manipulated using the ioctl()s in linux/if_tunnel.h. Refer to the iproute2 source code for clues. If for some reason you wanted perform the encapsulation or decapsulation yourself, you would need to create a packet socket. -- http://mail.python.org/mailman/listinfo/python-list
