Thu Sep 22 00:12:42 BST 2022

Making quite reasonable progress, though only running under emulation.
Since almost everything so far has been a recap of nixwrt, that's to
be expected.

The example config starts some services at boot, or at least attempts
to. Next we shoud

 - add some network config to run-qemu
 - implement udhcp and odhcp properly to write outputs
  and create resolv.conf and all that
 - write some kind of test so we can refactor the crap
 - not let the tests write random junk everywhere

Thu Sep 22 12:46:36 BST 2022

We can store outputs in the s6 scan directory, it seems:

> There is, however, a guarantee that s6-supervise will never touch subdirectories named data or env. So if you need to store user information in the service directory with the guarantee that it will never be mistaken for a configuration file, no matter the version of s6, you should store that information in the data or env subdirectories of the service directory.

https://skarnet.org/software/s6/servicedir.html

> process 'store/pj0b27l5728cypa5mmagz0q8ibzpik0h-execline-mips-unknown-linux-musl-2.9.0.1-bin/bin/execlineb' started with executable stack

https://skarnet.org/lists/skaware/1550.html


Thu Sep 22 16:14:49 BST 2022

what network peers do we want to model for testing?

- wan: pppoe
- wan: ip over ethernet, w/ dhcp service provided
- wan: l2tp over (ip over ethernet, w/ dhcp service provided)
- lan: something with a dhcp client

https://accel-ppp.readthedocs.io/en/latest/ could use this for testing
pppoe and l2tp?


Thu Sep 22 22:57:47 BST 2022

To build a nixos vm with accel-ppp installed (not yet configured)

  nix-build '<nixpkgs/nixos>' -A vm -I nixos-config=./tests/ppp-server-configuration.nix -o ppp-server
  QEMU_OPTS="-display none -serial mon:stdio -nographic" ./ppp-server/bin/run-nixos-vm

To test it's configured I thought I'd run it against an OpenWrt qemu
install, so, fun with qemu networking ensues. This config in ../openwrt-qemu
is using two multicast socket networks -

nix-shell -p qemu --run "./run.sh ./openwrt-22.03.0-x86-64-generic-kernel.bin openwrt-22.03.0-x86-64-generic-ext4-rootfs.img "

so hopefully we can spin up other VMs connected either to its lan or
its wan: *however* we do first need to configure its wan to use pppoe

uci set network.wan=interface
uci set network.wan.device='eth1'
uci set network.wan.proto='pppoe'
uci set network.wan.username='db123@a.1'
uci set network.wan.password='NotReallyTheSecret'

(it's ext4 so this will probably stick)


Fri Sep 23 10:27:22 BST 2022

* mcast=230.0.0.1:1234  : access (interconnect between router and isp)
* mcast=230.0.0.1:1235  : lan
* mcast=230.0.0.1:1236  : world (the internet)


Sun Sep 25 20:56:28 BST 2022

1) shutdown doesn't work as its using the busybox one not s6

2) think we shouldn't have process-based services like dhcp, ppp
implement "address provider interface" - instead have a separate
service for interface address that depends on the service and uses its
output

* ppp is not like dhcp because dhcp finds addresses for an existing
  interface but ppp makes a new one