* hostsfile: change internal map from hash to btree
This change makes the innernet section of /etc/hosts always ordered and
deterministic. We can take advantage of that to avoid writes, that will
be done in another commit.
* hostsfile: reduce number of writes if content hasn't changed
* hostsfile: return bool to inform if file has been written
This commit also makes the logs print accordingly to the new behavior.
* hostsfile: remove has_content_changed in favor of comparing old and new sections
* hostsfile: print the correct hosts path in log message
* hostsfile: remove unnecessary intermediate variable
* Turn ChangeString into a PeerChange enum, don't print NAT traversal reattempt as a modification
* Remove the ChangeString type
* Fix a stupid copy-paste error
* Add a missing call to reset a peer's endpoint when NAT traversal fails to connect to any endpoint candidates
* Simplify the process of resetting a peer to its server-reported endpoint
* client: Update enable_or_disable_peer exit message to be more accurate
* server: Implement disable-peer and enable-peer commands
* server: Immediately apply enable- and disable-peer to device
Surprisingly, Restart=always may not _always_ restart the unit if it restarts too fast.
Set a combination of options which should make systemd truly restart innernet always.
See https://unix.stackexchange.com/q/289629/352972.
The `RestartSec=60` is the main and important one which would prevent systemd from ever failing
to restart innernet in the default settings (because with it it would never exceed the default
limit of 5 restarts in 10 seconds).
`StartLimitIntervalSec=0` option is a complementary one for explicitly disabling the logic, and
may be removed from this PR if deemed unnecessary.
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
Matěj Laitl