forked from DGNum/liminix
think (foreshadowing)
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Daniel Barlow
Raito Bezarius
parent
1e9204f2f0
commit
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1 changed files with 167 additions and 3 deletions
170
THOUGHTS.txt
170
THOUGHTS.txt
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@ -4726,9 +4726,9 @@ outside of it
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[X] 2) if so, convert it to lualinux
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[X] 3) add netlink socket to event loop
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[X] 4) make it send messages to subscribers
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5) package it
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6) make uevent-watcher use it instead of netlink directly
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7) write an inout test variant that has the stick inserted
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[X] 5) package it
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[X] 6) make uevent-watcher use it instead of netlink directly
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[X] 7) write an inout test variant that has the stick inserted
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at boot time already
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I'm also thinking we could wrap the raw fds from lualinux into small
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@ -4741,3 +4741,167 @@ state before subscribing them [ needs a test ]
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figure out what event format the subscribers want? lua-ish or send the
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same messages as udev would? If we're going to send the originals,
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should we store them alongside the parsed, or reconstruct from parsed?
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Sat Apr 27 21:52:11 BST 2024
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We have a passing inout test. Next thing to do is try it on
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the actual arhcive hardware
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Next big thing is some kind of failovery service. Almost-obvious
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candidate is LTE failover with aaisp l2tp tunnel
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Tue Apr 30 23:27:30 BST 2024
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I want to connect my new ip camera to arthur without letting it reach the
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internet, or the internet reach it.
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we could plug it into a gl.inet box running dhcp server on lan
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and client on wan, then use NAT to expose the camera's http and rtsp
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ports on whatever address it has on the wan interface
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Tue May 7 22:23:49 BST 2024
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If we want to build a config with an l2tp upstream, it needs an
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underlying dhcp interface not pppoe as we can't use the bordervm l2tp
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account simultaneously. Having bordervm do dhcp might be quite useful
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anyway for other applications, although it will have to double-nat to
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the internet. We could give it an aaisp /64 and have routable ipv6 but
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maybe that's a level of faff too high.
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Given that we can build xl2tpd and a service for it.
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're using the same l2tp account for thingy that we use to simulate ppp,
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we need an upstream which is not ppp
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We need a less shit coldplug that copes with filenames containing spaces (!)
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Fri May 10 00:33:14 BST 2024
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Getting xl2tp hackily running turned out to be not a lot of work. However,
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we need to figure out routing
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- we need a route on lan device to the dns to lookup l2tp.aaisp.net.uk
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- we need a route on lan device to l2tp.aaisp.net.uk
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also it doesn't die when the tunnel closes, which is a bit shit
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maybe this is where we lean into health check services
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a health check service is just a service that watches another service
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and kills it if it's not healthy.
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for xl2tpd, "not healthy" is "there is no ppp process" or "there is no
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tunnel" or "the tunnel has no sessions". I don't know how we
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(robustly) test for no ppp process associated with the l2tp peer
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when ppp quits, does the tunnel come down?
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in xl2tld.c child_handler we respond to sigchld by closing c->fd
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and setting it to -1
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Sat May 11 17:55:04 BST 2024
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A better way to monitor the connection health would be to ping a
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computer on the internet (preferably one that doesn't mind being
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pinged). If we combine autodial with "is $isp still there" then we
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should have something fairly robust.
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xl2tpd spawns pppd, we should equip it with config that writes the
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ppp outputs (ip address etc) to the xl2tp service directory so
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that it can be used like a regular ppp. This will also make
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it possible to have the health check work by pinging the peer address
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Sun May 12 22:33:09 BST 2024
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sleep until the interface is probably up
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failure counter = 0
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loop indefinitely
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get outputs/peer-address of watched ppp service
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ping it
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if ok
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reset failure counter
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else
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increment failure counter
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fi
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if failure counter > threshold
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bounce the ppp service
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exit, if previous action didn't do that already
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end
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sleep(check interval)
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end loop
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# ps ax | grep l2tp
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72 root 1316 S s6-supervise l2tp.aaisp.net.uk.l2tp
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73 root 1316 S s6-supervise l2tp.aaisp.net.uk.l2tp-log
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122 root 1428 S {run.user} /bin/sh ./run.user l2tp.aaisp.net.uk.l2tp
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1099 root 1428 S {run.user} /bin/sh ./run.user l2tp.aaisp.net.uk.l2tp
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1102 root 1104 S {xl2tpd} /nix/store/i1bbqh7vybam03l6jzf4sm4np3k4ack5
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1115 root 1420 S grep l2tp
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# s6-rc -d change l2tp.aaisp.net.uk.l2tp
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# ps ax | grep l2tp
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72 root 1316 S s6-supervise l2tp.aaisp.net.uk.l2tp
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73 root 1316 S s6-supervise l2tp.aaisp.net.uk.l2tp-log
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122 root 1428 S {run.user} /bin/sh ./run.user l2tp.aaisp.net.uk.l2tp
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1102 root 1104 S {xl2tpd} /nix/store/i1bbqh7vybam03l6jzf4sm4np3k4ack5
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1122 root 1420 S grep l2tp
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Mon May 13 19:45:59 BST 2024
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We need to do the usb id swithcing dance thing for the lte modem.
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At startup it's 12d1:14fe, which is "mass storage mode", although the
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disks seem to disappear as soon as they appear which is weird
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probably the mode switch should be triggered by device insertion
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usb_modeswitch -v 12d1 -p 14fe --huawei-new-mode
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https://github.com/pixelspark/tymodem?tab=readme-ov-file
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Tue May 14 21:58:25 BST 2024
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[ we didn't need this. the first form is the default, the second
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is what something on the internet said we should change it to, the
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third is setting it back to default ]
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^SETPORT:A1,A2;12,1,16,A1,A2
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AT^SETPORT="FF;12,16"
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AT^SETPORT="A1,A2;12,1,16,A1,A2"
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Wed May 15 21:55:11 BST 2024
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we can use uevent-watch to look for devtype=usb_device product=12d1/14fe/102
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and trigger a oneshot that runs usb-modeswitch
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we can use uevent-watch to look for devtype=usb_device product=12d1/1506/102
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and trigger a oneshot that runs the AT commands
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if wwan0 is a triggered service how can dhcp depend on it? arse
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- we can get reverse dependencies from s6-rc-db, so the sematics of
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starting a triggered service could include starting everything it
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enables
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- we don't want to inadvertently start it on boot by putting it in the
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global config.services
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Thu May 16 09:09:44 BST 2024
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we could do something cleverish with the config.services at build time
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by stripping from it everything depending on a trigger. but then how
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_do_ they get started? the intent of putting it in config.services
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is that it will be started when conditions are suitable.
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can we: go through each service in config.services, detect the trigger
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that started it, and add it to a bundle named for that trigger?
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we need something in the triggering service to mark the triggered
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service as not-for-boot, and then to apply that transitively to
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everyting depending on it
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I don't think we have common code for triggers, so either we need to
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add some or put this marking in all of the current examples
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