Since peer endpoints can be either IPv4 or IPv6, it doesn't make sense
to specify a default MTU that could only work with IPv4 based on only
the server's endpoint.
Setting to 1412 instead of 1420 in order to accomodate PPPoE peers,
which should fit most internet situations.
also introduces a new `netlink-request` crate to help modularize the netlink code. this currently depends on a fork of the `netlink` project, but we should be able to use the official version soon.
* client: allow config/data dirs to be changed
* server: allow config/data dirs to be changed
* meta: cargo clippy & cargo fmt
* shared: use const for Duration instead of lazy_static
added to `innernet {up,fetch,install}`:
--no-nat-traversal: Doesn't attempt NAT traversal
(prevents long time delays in execution of command)
--exclude-nat-candidates: Exclude a list of CIDRs from being
considered candidates
--no-nat-candidates: Don't report NAT candidates.
(shorthand for '--exclude-nat-candidates 0.0.0.0/0')
Closes#160
Before, only clients would report local addresses for NAT traversal. Servers should too! This will be helpful in common situations when the server is run inside the same LAN as other peers, and there's no NAT hairpinning enabled (or possible) on the router.
closes#146
Previously, we treated all IPv6 addresses as assignable, but that causes
problems with setups that expect the first address in a subnet to be the
router anycast address.
Note that this does not fix existing innernet networks, and those
experiencing this problem are advised to revised to recreate their
network after this fix has been merged. Sorry for the annoyance.
Fixes#131
This change adds the ability for peers to report additional candidate endpoints for other peers to attempt connections with outside of the endpoint reported by the coordinating server.
While not a complete solution to the full spectrum of NAT traversal issues (TURN-esque proxying is still notably missing), it allows peers within the same NAT to connect to each other via their LAN addresses, which is a win nonetheless. In the future, more advanced candidate discovery could be used to punch through additional types of NAT cone types as well.
Co-authored-by: Matěj Laitl <matej@laitl.cz>
* Tidy code a bit thanks to clippy
Clippy 1.54 newly detects some redundant constructs, that's nice.
sort_unstable() should yield exact same results as sort() for `Vec<&str>`
and could be faster, clippy says.
* Add clippy to CI
The past behavior of clients was to, on every fetch from the server, update each of its peer's endpoints with the one reported from the server. While this wasn't a problem on certain types of NATs to help with holepunching, in some situations it caused previously working connections to no longer work (when one peer had a port-restricted or symmetric cone type NAT).
