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69 Commits

Author SHA1 Message Date
Michael Stapelberg
2b6ab5b2bd dhcp4d: make hostname override settable from status page 2020-04-12 10:33:11 +02:00
Michael Stapelberg
e67fb4dd71 diagd: make output look good in a terminal, too 
curl diagd.router7/
 2020-03-11 22:12:00 +01:00
Michael Stapelberg
e34148d4e7 dhcp4d: add some leeway for lease activity 2020-02-06 18:48:19 +01:00
Michael Stapelberg
a543cb9a34 dhcp4d: add header describing whether lease is active 
Should be interpreted by the DHCP server so that other programs don’t need to
hard-code the lease time.
 2020-01-31 19:11:08 +01:00
Michael Stapelberg
a2ea8c2f95 cmd/dhcp4d: refactor for testing, add /lease/ test 2020-01-31 19:00:51 +01:00
Michael Stapelberg
4558cb61b4 dhcp4d: serve lease json data at /lease/<hostname> 2020-01-31 18:30:18 +01:00
Michael Stapelberg
3707ba290c dhcp4d: move http.HandleFunc into logic 2020-01-31 18:25:02 +01:00
Michael Stapelberg
e76886dab4 dhcp4d: protect leases with a mutex 
The HTTP handler runs in a separate goroutine.
 2020-01-31 18:23:19 +01:00
Michael Stapelberg
fa82132962 dhcp4d: add HostnameOverride field 
This can be used to permanently override a hostname, regardless of whether the
lease is static or not. We use a separate field because we want devices to be
able to change their hostname themselves, until we override it.
 2019-08-30 09:06:21 +02:00
Michael Stapelberg
323cc42b8e dhcp4d: polish status page, actually update it upon changes 2019-07-20 11:07:11 +02:00
Michael Stapelberg
c602f1d6b6 dhcp4d: introduce -interface flag 2019-07-20 10:50:30 +02:00
Michael Stapelberg
c211763b5d dhcp4d: indent leases.json for easier human editing 2019-07-20 10:49:53 +02:00
Michael Stapelberg
373c83196d dhcp4: make interface and state directory configurable 
This is useful for manual testing on separate interfaces.
 2019-06-06 07:52:08 +02:00
Michael Stapelberg
3dad1e9a23 dhcp4: use the configured (not the current) MAC address 
This fixes a race where dhcp4 started before netconfigd had a chance to change
the hardware address on the uplink0 interface.

fiber7’s port security feature may result in an about hour-long internet outage
without this commit.
 2019-02-19 09:39:16 +01:00
Michael Stapelberg
abeddabbb7 dhcp4d: restrict lease details page to internal IPs 2019-02-19 07:50:39 +01:00
Michael Stapelberg
6320b6c3a7 dhcp4d: display MAC vendor of each lease’s HardwareAddr 2019-01-06 18:02:01 +01:00
Michael Stapelberg
8df6329209 use renameio to write files atomically 2019-01-06 15:25:33 +01:00
Michael Stapelberg
f67d4ec93f radvd: load extra prefixes from /perm/radvd/prefixes.json 2019-01-06 15:12:22 +01:00
Michael Stapelberg
bd8fc63b0e dns: implement per-DHCP-lease dyndns 
The HTTP API is easy to use from the command line or from Go:

% curl --data "host=sub&ip=192.168.33.44" -4 http://router7:8053/dyndns
ok
% host sub.$(hostname)
sub.midna has address 192.168.33.44

This can be used in combination with https://github.com/gokrazy/gdns
 2019-01-06 14:41:26 +01:00
Michael Stapelberg
8c55c5ba44 dhcp4: switch to github.com/rtr7/dhcp4 
All existing DHCPv4 packages I looked at were unappealing for one reason or
another, so we’re now using a little helper to glue github.com/google/gopacket
and github.com/mdlayher/raw together, which suffices for our use-case and gives
us more control.
 2018-11-21 08:18:58 +01:00
Michael Stapelberg
fac1bf231e netconfigd: notify dhcp4d to update its listeners 2018-10-29 18:14:01 +01:00
Michael Stapelberg
7d278289f0 captured: directly call NextPacket() to prevent hanging reads 
Using Packets() spawns off a separate goroutine which calls NextPacket in a loop
until io.EOF is returned. This goroutine will stick around after Close()
returned, resulting in only the first wireshark connection working.
 2018-10-23 09:56:07 +02:00
Michael Stapelberg
d9f5d95812 dhcp4d: export number of non-expired DHCP leases 2018-10-23 08:49:29 +02:00
Michael Stapelberg
ea4ffa7bec OpenEthernet → NewEthernetHandle, remove kludge 2018-09-07 00:50:41 +02:00
Michael Stapelberg
b03596f1c5 nftables: use stateful object counters 
This way, we can atomically get and reset them.

fixes https://github.com/rtr7/router7/issues/3
 2018-08-08 23:15:21 +02:00
Michael Stapelberg
9131e7a99c dhcp6: add missing err parameter 2018-07-14 15:17:12 +02:00
Michael Stapelberg
9153805e69 randomd moved to github.com/gokrazy/gokrazy/cmd/randomd 2018-07-14 12:51:28 +02:00
Michael Stapelberg
b347ed74c5 update import paths 2018-07-09 08:54:04 +02:00
Michael Stapelberg
88bf7d90eb dhcp6: delay at least 10s before attempts 
Otherwise we might exceed fiber7’s firewall rules and get blacklisted.
 2018-07-03 17:36:46 +02:00
Michael Stapelberg
ff7aa8f2cb add copyright notices 2018-06-28 20:08:23 +02:00
Michael Stapelberg
ab75e4a1b5 check for updateListeners errors 2018-06-28 20:08:23 +02:00
Michael Stapelberg
2b3cf0bf61 captured: use multilisten 2018-06-28 20:08:23 +02:00
Michael Stapelberg
c24eefbb51 diagd: expose machine-readable healthiness 2018-06-26 21:52:29 +02:00
Michael Stapelberg
72661b13ec dnsd: listen on 8053 (metrics) on ipv6-net::1 2018-06-26 21:15:14 +02:00
Michael Stapelberg
4c7741a337 add backupd 2018-06-26 18:01:50 +02:00
Michael Stapelberg
86c9436e98 diagd: only listen on private addresses 2018-06-26 09:47:55 +02:00
Michael Stapelberg
89e1276ad4 dns: simplify resolving code 2018-06-26 09:33:23 +02:00
Michael Stapelberg
10df129c1f dns: listen on all private IP addresses 2018-06-26 08:53:20 +02:00
Michael Stapelberg
60de127991 Describe all packages and binaries. 2018-06-25 20:12:51 +02:00
Michael Stapelberg
ae15230da3 dhcp4d: log in leases callback 2018-06-24 11:56:39 +02:00
Michael Stapelberg
57564e15d0 captured: increase ring buffer 
5000 packets translated to just about 2 hours, which is not long enough.
 2018-06-24 11:52:07 +02:00
Michael Stapelberg
bf2c12a69d netconfigd: export ipv4/ipv6 packet/bytes counters on :8066 2018-06-23 19:56:34 +02:00
Michael Stapelberg
6705108481 add randomd: carries entropy across system restarts 
As practiced by Debian (and others) and recommended in the urandom(4) manpage:
https://manpages.debian.org/stretch/manpages/urandom.4.en.html#Configuration
 2018-06-23 17:46:55 +02:00
Michael Stapelberg
3ba84074c7 dhcp4d: send replies as unicast using raw sockets 
Preferring unicast over multicast (which hogs a lot of airtime on WiFi networks)
is a best practice.

Some device/access point vendor combinations even seem to entirely eat (some?)
broadcast traffic (sometimes), e.g. my Apple iPhone SE/Ubiquiti UAP-AC-HD, so
that using unicast is required for reliable WiFi.
 2018-06-23 17:46:53 +02:00
Michael Stapelberg
37bf17e1b7 make binaries cope with Squashfs root 2018-06-22 17:59:23 +02:00
Michael Stapelberg
24e2d5de00 dnsd: serve prometheus metrics on port 8053 2018-06-18 08:04:56 +02:00
Michael Stapelberg
0e6add220c notify dyndns from netconfigd, i.e. _after_ applying addresses 2018-06-17 20:44:25 +02:00
Michael Stapelberg
7a46d077ee dhcp4/dhcp6: notify dyndns if present 2018-06-17 19:30:30 +02:00
Michael Stapelberg
bb6b901b90 captured: implement a packet ring buffer 
So that when you connect with Wireshark, you’ll see the most recent
packets (takes up to 7 MB of RAM).
 2018-06-17 17:47:26 +02:00
Michael Stapelberg
2c302d976d captured: plug goroutine leak from closed SSH connections 2018-06-17 16:49:37 +02:00