The build_netmask function was incorrectly dividing the size of the bytes_type
by 8. Also use b.size() instead of sizeof for consistency.
I'm not 100% certain what the difference between DestinationPrefix.PrefixLength
and SitePrefixLength is. It looks like SitePrefixLength is something specific to
site-local addresses. Emperically I found DestinationPrefix.PrefixLength
contains reasonable values while SitePrefixLength is always zero.
using if_indextoname instead of RTM_GETLINK to fill the interface name in enum_net_interfaces. removed IFA_LABEL switch case, removed ip_interface::mtu, master rebase
The seq and pid parameter are apparently used as a safety check in case
a stream of netlink messages is not properly terminated. I initially thought
that they represented the expected values of the incoming messages.
Instead seq is set to one-past the expected value and the loop aborts when
seq and pid match the message.
Inverting the logic so that reading continues as long as the seq and pid match
the incoming messages is, to me at least, more intuitive. It is also more
reliable since it does not rely on the next seq being strictly sequential. It
also catches unexpected messages preceding or interleaved with the expected
messages.
There seems to be a lot of confusion all across the internet over the
nlmsg_pid field. The changes here were made based on examination of the
kernel source and iproute2 (a common user of netlink).
The kernel does not read nlmsg_pid at all for routing messages.
Iproute2 sets it to zero unconditionally so I changed this code to do the same.
We shouldn't listen on addresses which are duplicates, deprecated,
or tenative unless explicitly requested.
This is only supported on Windows for now because the Linux interface
to get this information is much less convenient for libtorrent to use.
As far as I've been able to determine, Linux only exposes this information
via the RTM_NEWADDR and RTM_GETADDR netlink messages. Currently libtorrent
uses getifaddrs() to enumerate network interfaces on Linux so this will
probably need to be changed to use netlink if available.
MacOS: ???
arvidn