While this API is documented as legacy (and there is a sysctl option to
disable it) the documentation also mentions that it will probably stay
enabled by default due to compatibility issues with existing applications.
With the previous approach only 255 devices could be opened then the
daemon had to be restarted.
Fixes#2313.
Instead of allocating MTU-sized buffers for each packet, read to a stack buffer
and copy to an allocation of the actual packet size. While it requires an
additional copy on non-Apple platforms, this should make allocation more
efficient for small packets.
FreeBSD 10 deprecated the SIOCSIFADDR etc. commands, so we use this
newer command to set the address and netmask. A destination address
is now also required.
Fixes#566.
On CentOS 6.5 the sys/capability.h header file defines _LINUX_TYPES_H
without actually including that header, preventing its later inclusion
here.
As library.h (via which the capabilities headers are included) is not
actually required in tun_device.[ch], moving the inclusion of tun_device.h
would not strictly be necessary. But it's probably a good idea to
include our own headers after system headers anyway, for if one of the
recursively included files at a later point includes library.h we'd have
the same problem again.
Tobias Brunner