feat(api): add option to select the used network interface

fixes #117
MauriceNino · Jun 15, 2022 · 8b6a78d · 8b6a78d
1 parent d4b1f69
commit 8b6a78d
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diff --git a/.github/CONFIGURATION.md b/.github/CONFIGURATION.md
@@ -79,6 +79,7 @@ in the [INSTALL.md](./INSTALL.md).
 
 | Variable                           | Description                                                                                                                                                                                                                                   | Type   | Default Value                              |
 | ---------------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------ | ------------------------------------------ |
+| `DASHDOT_USE_NETWORK_INTERFACE`    | If dashdot detects the wrong gateway as your default interface, you can provide a name here that is used instead                                                                                                                              | string |                                            |
 | `DASHDOT_SPEED_TEST_INTERVAL`      | At which interval the network speed-test should be rerun (in minutes)                                                                                                                                                                         | number | `60`                                       |
 | `DASHDOT_NETWORK_LABEL_LIST`       | Change the order of the labels in the list, to change the position in the widget, or remove an item from the list, to remove it from the widget (The available options are: `type`, `speed_up`, `speed_down`, `interface_speed`, `public_ip`) | string | `type,speed_up,speed_down,interface_speed` |
 | `DASHDOT_NETWORK_WIDGET_GROW`      | To adjust the relative size of the Network widget                                                                                                                                                                                             | number | `6`                                        |

diff --git a/apps/api/src/config.ts b/apps/api/src/config.ts
@@ -48,6 +48,7 @@ export const CONFIG: Config = {
   ram_shown_datapoints: numNull(penv('RAM_SHOWN_DATAPOINTS')) ?? 20,
   ram_poll_interval: numNull(penv('RAM_POLL_INTERVAL')) ?? 1000,
 
+  use_network_interface: penv('USE_NETWORK_INTERFACE') ?? '',
   speed_test_interval: numNull(penv('SPEED_TEST_INTERVAL')) ?? 60,
   network_label_list: lst(
     penv('NETWORK_LABEL_LIST') ?? 'type,speed_up,speed_down,interface_speed'

diff --git a/apps/api/src/setup-networking.ts b/apps/api/src/setup-networking.ts
@@ -1,6 +1,7 @@
 import { exec as exaca } from 'child_process';
 import * as fs from 'fs';
 import { promisify } from 'util';
+import { CONFIG } from './config';
 
 const exec = promisify(exaca);
 
@@ -18,6 +19,23 @@ export const setupNetworking = async () => {
     }
 
     try {
+      if (CONFIG.use_network_interface !== '') {
+        if (
+          fs.existsSync(
+            `/internal_mnt/host_sys/class/net/${CONFIG.use_network_interface}`
+          )
+        ) {
+          NET_INTERFACE = CONFIG.use_network_interface;
+          console.log(`Using network interface from config "${NET_INTERFACE}"`);
+
+          return;
+        } else {
+          console.warn(
+            `Network interface "${CONFIG.use_network_interface}" not found, using first available interface`
+          );
+        }
+      }
+
       const { stdout } = await exec(
         "nsenter --net=/mnt/host_ns_net route | grep default | awk '{print $8}'"
       );

diff --git a/libs/common/src/index.ts b/libs/common/src/index.ts
@@ -95,6 +95,7 @@ export type Config = {
   ram_poll_interval: number;
 
   // Network Widget
+  use_network_interface: string;
   speed_test_interval: number;
   network_label_list: (
     | 'type'