nerves-networking/vintage_net_mobile

Mobile networking for VintageNet

vintage_net_mobile's Issues

Do not fail for the tty not being available

If VintageNetLTE starts without the modem connected pppd fails continuously bubbling up to the whole application. I've solved it quickly by checking for the tty existance before starting pppd: LostKobrakai@d521c39

Config

I'm in the process of updating to the renamed vintage_net_mobile version and I'm wondering what the difference between extra_modems and extra_service_providers configs are to just providing those information in:

{"ppp0", %{type: VintageNetMobile, modem: your_modem, service_provider: your_service_provider}}

sisCOM modules SIM7xxx series

Hi, what about support for SIMCom chipsets. This from Waveshare, there are some other manufacturers of board for Raspberry using that chipset.

[SIM7000E NB-IoT HAT] (https://www.waveshare.com/wiki/SIM7000E_NB-IoT_HAT 1)
[SIM7080G Cat-M/NB-IoT HAT] (https://www.waveshare.com/wiki/SIM7080G_Cat-M/NB-IoT_HAT 1)
[SIM7600G-H 4G HAT] (https://www.waveshare.com/wiki/SIM7600G-H_4G_HAT)

Removable modems

As requested on the forums: https://elixirforum.com/t/vintagenet-a-new-network-configuration-library-for-nerves/27535/3

What I have right now are a few related modules:

RentoryHub.Hardware.Usb is mostly borrowed from Toolshed's lsusb

defmodule RentoryHub.Hardware.Usb do
  @doc "Find out if a USB device is available"
  def available?(id) do
    Enum.any?(usb_information(), &match_id_in_information(&1, id))
  end

  defp match_id_in_information(%{"PRODUCT" => pid}, id), do: to_vidpid(pid) == id
  defp match_id_in_information(_, _), do: false

  @doc "Information about all usb devices available"
  def usb_information do
    Path.wildcard("/sys/bus/usb/devices/*/uevent")
    |> Enum.map(&File.read!/1)
    |> Enum.map(&parse_kv_config/1)
    |> Enum.filter(&(&1["DEVTYPE"] == "usb_device"))
  end

  defp parse_kv_config(contents) do
    contents
    |> String.split("\n")
    |> Enum.flat_map(&parse_kv/1)
    |> Enum.into(%{})
  end

  defp parse_kv(""), do: []
  defp parse_kv(<<"#", _rest::binary>>), do: []

  defp parse_kv(key_equals_value) do
    [key, value] = String.split(key_equals_value, "=", parts: 2, trim: true)
    [{key, value}]
  end

  defp to_vidpid(""), do: "?"

  defp to_vidpid(raw) do
    # The VIDPID comes in as "vid/pid/somethingelse"
    [vid_str, pid_str, _] = String.split(raw, "/", trim: true)
    vid = String.pad_leading(vid_str, 4, "0")
    pid = String.pad_leading(pid_str, 4, "0")
    vid <> ":" <> pid
  end
end

RentoryHub.Hardware.UsbDetector polls usb devices and uses some pubsub to notify other parties. This is use to trigger the usb_modeswitch I need for my modem. It could also detect the modem and "enable" ppp afterwards, but currently there's not really an api for vintagenet to enable/disable ppp.

defmodule RentoryHub.Hardware.UsbDetector do
  use GenStateMachine, callback_mode: [:handle_event_function, :state_enter]
  alias RentoryHub.Hardware.Usb

  def start_link(init_arg) do
    GenStateMachine.start_link(__MODULE__, init_arg)
  end

  @impl GenStateMachine
  def init(init_arg) do
    id = Keyword.fetch!(init_arg, :id)
    interval = Keyword.get(init_arg, :interval, :timer.seconds(10))

    {:ok, check_state(id), %{id: id, interval: interval}, tick_timeout_action(interval)}
  end

  def handle_event(:enter, _, state, %{id: id}) do
    RentoryHub.PubSub.publish("usb/#{id}", %{state: state})
    :keep_state_and_data
  end

  @impl GenStateMachine
  def handle_event({:timeout, :tick}, _, state, %{id: id, interval: interval} = data) do
    case check_state(id) do
      ^state -> {:keep_state_and_data, tick_timeout_action(interval)}
      state -> {:next_state, state, data, tick_timeout_action(interval)}
    end
  end

  defp tick_timeout_action(interval) do
    {{:timeout, :tick}, interval, %{}}
  end

  defp check_state(id) do
    if Usb.available?(id), do: :available, else: :unavailable
  end
end

Supervisor.child_spec({RentoryHub.Hardware.UsbDetector, id: "12d1:1f01"},
        id: {RentoryHub.Hardware.UsbDetector, "12d1:1f01"}
      ),

I'm actually wondering if this should be a concern for vintage_net at all. Maybe the device detection part is one thing and vintage_net_lte should just handle a tty file being available or not (or coming/going).

u-blox TOBY-L2 broken in v0.8.0

I've been told that wwan0 doesn't show up on the TOBY-L2, so it never gets configured. This is even though the instructions say to use the wwan kernel module. Since I don't have a TOBY-L2, I can't debug this, but I'd appreciate it if anyone could debug it.

Configure DNS servers

Some providers will provide DNS servers, so we don't have to ask for them.

• Add configuration field :dns_servers which is a list of DNS IP address
• If this field is configured
  • Don't have usepeerdns option in the pppd options
  • Setup the VintageNet.NameResolver to use the provided IP(s)
  • Note: Right now in the PPPDNotifications module we assume that we always ask
    for DNS servers from the peer, we will need to not make this assumption and check those values before trying to set up the VintageNet.NameResolver
• If the field is not configured everything should function as it does right now

/etc/ppp/… files not compiled but still a folder

For me ppp doesn't set up routes or anything, so I looked into the details and on my system all the "files" in /etc/ppp/… are still folders with the source files (Makefile and ppp_to_elixir.c), while ppp_to_elixir and pppd_shim.so are compiled binaries.

Huawei E3372 with different PID, what to do about it?

Describe the bug
A Huawei E3372 modem I have has a pid of 0x1F01 instead of 0x14FE as what the driver currently expects.

What should be done about this? Clearly, making the PID configurable would work to some extent, but that would still make it a guessing game, if one doesn't already know what PID the modem has.

What would be a good way to make this automatic?