Daniel Barlow
73ae7788b9
we only currently support huawei e3372/cdc ncm so let's make that explicit in the naming
71 lines
2.1 KiB
Nix
71 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) 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 rec {
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name = "modem-modeswitch";
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controller = (svc.uevent-rule.build {
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serviceName = name;
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terms = { devtype = "usb_device"; product = "12d1/14fe/102"; };
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});
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up = ''
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${usb-modeswitch}/bin/usb_modeswitch -v 12d1 -p 14fe --huawei-new-mode
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'';
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};
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atz = oneshot rec {
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name = "modem-atz";
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# atz does not depend on modeswitch because modeswitch service
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# is only running when the stick is in the wrong mode
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dependencies = [ modeswitch.controller ];
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buildInputs = [ modeswitch ];
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controller = (svc.uevent-rule.build {
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serviceName = name;
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terms = {
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subsystem = "tty";
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attrs = {
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idVendor = "12d1";
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idProduct = "1506";
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};
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};
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symlink = "/dev/modem";
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});
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up = ''
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ls -l /dev/modem
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test -L /dev/modem || exit 1
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${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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in svc.network.link.build {
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ifname = "wwan0";
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dependencies = [ atz ];
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}
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