The current approach to get default route IP is finding the LAN
interface with the same MAC address. However, there could be multiple
interfaces like that, making ctrld confused.
This commit fixes this issue, by listing all possible private IPs, then
sorting them and use the smallest one for router self queries.
For reporting router queries, ctrld uses private IP of the default route
interface. However, when the default route is conntected directly to
ISP, the interface will have a public IP, and another interface with the
same MAC address will be created for LAN ip. So when no private IP found
for default route interface, ctrld must look at the other interface to
find the corret LAN ip.
The only reason that forces ctrld to depend on vyatta-dhcpd service on
EdgeOS is allowing ctrld to watch lease files properly, because those
files may not be created at the time client info table initialized.
However, on some EdgeOS version, vyatta-dhcpd could not start with an
empty config file, causing restart loop itself, flooding systemd log,
making the router run out of memory.
To fix this, instead of depending on vyatta-dhcpd, we should just watch
for lease files creation, then adding them to watch list.
While at it, also making ctrld starts after nss-lookup, ensuring we have
a working DNS before starting ctrld.
Using the same approach as in cd mode, but do it only once when running
ctrld the first time, then the config will be re-used then.
While at it, also adding Dockerfile.debug for better troubleshooting
with alpine base image.
- Watch more events for lease file changes
- Improving network up detection by using bootstrap IPv6 along side
IPv4 one.
- Emitting log to notice user that ctrld is starting.
- Using systemd wrapper to provide correct status.
- Restoring DNS on stop on Windows.
On routers where we want to wait for NTP by checking nvram key. Before
waiting, we clean up the router to ensure it's restored to original
state. However, router.Cleanup is not idempotent, causing dnsmasq
restarted. On tomato/ddwrt, restarting have no delay, and spawning new
dnsmasq process immediately. On merlin, somehow it takes time to spawn
new dnsmasq process, causing ctrld wrongly think there's no one
listening on port 53.
Fixing this by ensuring router.Cleanup is idempotent. While at it, also
adding "ntp_done" to nvram key, which is now using on latest ddwrt.
For local config, we don't want to alter what user explicitly set, and
only try filling in missing value.
While at it, also remove the dnsmasq port delete on openwrt, we don't
need that hack anymore.
Config fetching/generating in cd mode is currently weird, error prone,
and easy for user to break ctrld when using custom config.
This commit reworks the flow:
- Fetching config from Control D API.
- No custom config, use the current default config.
- If custom config presents, but there's no listener, use 0.0.0.0:53.
- Try listening on current ip+port config, if ok, ctrld could be a
direct listener with current setup, moving on.
- If failed, trying 127.0.0.1:53.
- If failed, trying current ip + port 5354
- If still failed, pick a random ip:port pair, retry until listening ok.
With this flow, thing is more predictable/stable, and help removing the
Config interface for router.
Depending on system, the output of `/etc/init.d/ctrld status` can be
either "Running" or "running", we must do in-sensitive comparison to get
the right status of ctrld.
