Initial commit: dnsmasq web UI

- ASP.NET Core 9 Blazor Web App + Web API - Hosts file management (read/write, hosts(5) format) - DHCP static hosts (dhcp-host=, dnsmasq config) - DHCP leases (read-only, dnsmasq lease file format) - Reload and status commands (configurable) - Docker: standalone app image + Dockerfile.dnsmasq (app + dnsmasq) - docker-compose.test.yml: app + dhcp-client, testdata mount - Unit tests (Hosts, DhcpHost, Leases, DnsmasqConfig parsers) using testdata
2026-10-22 07:52:08 +10:00 · 2026-01-31 03:06:46 +10:00
commit e99b2d0453
105 changed files with 62565 additions and 0 deletions
@@ -0,0 +1,76 @@
+using System.Diagnostics;
+using DnsmasqWebUI.Options;
+using Microsoft.AspNetCore.Mvc;
+using Microsoft.Extensions.Options;
+
+namespace DnsmasqWebUI.Controllers;
+
+[ApiController]
+[Route("api/[controller]")]
+public class StatusController : ControllerBase
+{
+    private readonly DnsmasqOptions _options;
+
+    public StatusController(IOptions<DnsmasqOptions> options)
+    {
+        _options = options.Value;
+    }
+
+    [HttpGet]
+    public IActionResult Get()
+    {
+        try
+        {
+            var dnsmasqStatus = GetDnsmasqServiceStatus();
+            return Ok(new
+            {
+                hostsPath = _options.HostsPath,
+                configPath = _options.ConfigPath,
+                leasesPath = _options.LeasesPath,
+                hostsPathExists = !string.IsNullOrEmpty(_options.HostsPath) && System.IO.File.Exists(_options.HostsPath),
+                configPathExists = !string.IsNullOrEmpty(_options.ConfigPath) && System.IO.File.Exists(_options.ConfigPath),
+                leasesPathConfigured = !string.IsNullOrEmpty(_options.LeasesPath),
+                leasesPathExists = !string.IsNullOrEmpty(_options.LeasesPath) && System.IO.File.Exists(_options.LeasesPath),
+                reloadCommandConfigured = !string.IsNullOrWhiteSpace(_options.ReloadCommand),
+                statusCommandConfigured = !string.IsNullOrWhiteSpace(_options.StatusCommand),
+                dnsmasqStatus
+            });
+        }
+        catch (Exception ex)
+        {
+            return StatusCode(500, new { error = ex.Message });
+        }
+    }
+
+    /// <summary>Runs StatusCommand if configured; returns "active" | "inactive" | "unknown" | "notConfigured".</summary>
+    private string GetDnsmasqServiceStatus()
+    {
+        if (string.IsNullOrWhiteSpace(_options.StatusCommand))
+            return "notConfigured";
+
+        try
+        {
+            using var process = new Process
+            {
+                StartInfo = new ProcessStartInfo
+                {
+                    FileName = "/bin/sh",
+                    Arguments = "-c \"" + _options.StatusCommand.Replace("\"", "\\\"") + "\"",
+                    RedirectStandardOutput = true,
+                    RedirectStandardError = true,
+                    UseShellExecute = false,
+                    CreateNoWindow = true
+                }
+            };
+            process.Start();
+            process.StandardOutput.ReadToEnd();
+            process.StandardError.ReadToEnd();
+            process.WaitForExit(TimeSpan.FromSeconds(5));
+            return process.ExitCode == 0 ? "active" : "inactive";
+        }
+        catch
+        {
+            return "unknown";
+        }
+    }
+}