68 lines
2.1 KiB
Nix
68 lines
2.1 KiB
Nix
{
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liminix
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, usb-modeswitch
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, ppp
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, lib
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, svc
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, uevent-watch
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}:
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{ apn, username, password, authType }:
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let
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inherit (liminix.services) bundle longrun oneshot;
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authTypeNum = if authType == "pap" then "1" else "2";
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chat = lib.escapeShellArgs [
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# Your usb modem thing might present as a tty that you run PPP
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# over, or as a network device ("ndis" or "ncm"). The latter
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# kind is to be preferred, at least in principle, because it's
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# faster. This initialization sequence works for the Huawei
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# E3372, and took much swearing: the error messages are *awful*
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"" "AT"
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"OK" "ATZ"
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# create PDP context
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"OK" "AT+CGDCONT=1,\"IP\",\"${apn}\""
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# activate PDP context
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"OK" "AT+CGACT=1,1"
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# setup username and password per requirements of sim provider.
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# (caret is special to chat, so needs escaping in AT commands)
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"OK" "AT\\^AUTHDATA=1,${authTypeNum},\"\",\"${password}\",\"${username}\""
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# start the thing (I am choosing to read this as "NDIS DialUP")
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"OK" "AT\\^NDISDUP=1,1"
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"OK"
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];
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modeswitch = oneshot {
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name = "modem-modeswitch";
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up = ''
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${usb-modeswitch}/bin/usb_modeswitch -v 12d1 -p 14fe --huawei-new-mode
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'';
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};
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atz = oneshot {
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name = "modem-atz";
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dependencies = [ modeswitch ];
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up = ''
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ls -l /dev/modem
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${ppp}/bin/chat -s -v ${chat} 0<>/dev/modem 1>&0
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'';
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down = "${ppp}/bin/chat -v '' ATZ OK 0<>/dev/modem 1>&0";
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};
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setup = bundle {
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name = "modemm-mm-mm-mm";
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contents = [
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(longrun {
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name = "watch-for-usb-modeswitch";
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isTrigger = true;
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buildInputs = [ modeswitch ];
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run = "${uevent-watch}/bin/uevent-watch -s ${modeswitch.name} devtype=usb_device product=12d1/14fe/102";
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})
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(longrun {
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name = "watch-for-modem";
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isTrigger = true;
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buildInputs = [ atz ];
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run = "${uevent-watch}/bin/uevent-watch -n /dev/modem -s ${atz.name} subsystem=tty attrs.idVendor=12d1 attrs.idProduct=1506";
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})
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];
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};
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in svc.network.link.build {
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ifname = "wwan0";
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dependencies = [ setup ];
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}
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