From 4f0a4173b5251e11381e9186eea27be6996fbad5 Mon Sep 17 00:00:00 2001
From: Simon Zolin <s.zolin@adguard.com>
Date: Fri, 29 May 2020 14:25:20 +0300
Subject: [PATCH] + "dhcp_available"

---
 AGHTechDoc.md        |  1 +
 home/control.go      |  1 +
 home/home.go         | 27 +++++++++++++++++----------
 openapi/openapi.yaml |  2 ++
 4 files changed, 21 insertions(+), 10 deletions(-)

diff --git a/AGHTechDoc.md b/AGHTechDoc.md
index 1562b354..002b6232 100644
--- a/AGHTechDoc.md
+++ b/AGHTechDoc.md
@@ -388,6 +388,7 @@ Response:
 	"language":"en",
 	"protection_enabled":true,
 	"running":true,
+	"dhcp_available":true,
 	"version":"undefined"
 	}
 
diff --git a/home/control.go b/home/control.go
index 310b9f20..3cedcd87 100644
--- a/home/control.go
+++ b/home/control.go
@@ -56,6 +56,7 @@ func handleStatus(w http.ResponseWriter, r *http.Request) {
 
 		"protection_enabled": c.ProtectionEnabled,
 	}
+	data["dhcp_available"] = (Context.dhcpServer != nil)
 
 	jsonVal, err := json.Marshal(data)
 	if err != nil {
diff --git a/home/home.go b/home/home.go
index 496e95c2..a0e2ea1b 100644
--- a/home/home.go
+++ b/home/home.go
@@ -211,10 +211,12 @@ func run(args options) {
 	config.DHCP.WorkDir = Context.workDir
 	config.DHCP.HTTPRegister = httpRegister
 	config.DHCP.ConfigModified = onConfigModified
-	Context.dhcpServer = dhcpd.Create(config.DHCP)
-	if Context.dhcpServer == nil {
-		log.Error("Failed to initialize DHCP server, exiting")
-		os.Exit(1)
+	if runtime.GOOS != "windows" {
+		Context.dhcpServer = dhcpd.Create(config.DHCP)
+		if Context.dhcpServer == nil {
+			log.Error("Failed to initialize DHCP server, exiting")
+			os.Exit(1)
+		}
 	}
 	Context.autoHosts.Init("")
 	Context.clients.Init(config.Clients, Context.dhcpServer, &Context.autoHosts)
@@ -296,9 +298,11 @@ func run(args options) {
 			}
 		}()
 
-		err = Context.dhcpServer.Start()
-		if err != nil {
-			log.Fatal(err)
+		if Context.dhcpServer != nil {
+			err = Context.dhcpServer.Start()
+			if err != nil {
+				log.Fatal(err)
+			}
 		}
 	}
 
@@ -447,9 +451,12 @@ func cleanup() {
 	if err != nil {
 		log.Error("Couldn't stop DNS server: %s", err)
 	}
-	err = Context.dhcpServer.Stop()
-	if err != nil {
-		log.Error("Couldn't stop DHCP server: %s", err)
+
+	if Context.dhcpServer != nil {
+		err = Context.dhcpServer.Stop()
+		if err != nil {
+			log.Error("Couldn't stop DHCP server: %s", err)
+		}
 	}
 
 	Context.autoHosts.Close()
diff --git a/openapi/openapi.yaml b/openapi/openapi.yaml
index a9791c4d..bad7c601 100644
--- a/openapi/openapi.yaml
+++ b/openapi/openapi.yaml
@@ -1049,6 +1049,8 @@ definitions:
                 maximum: 65535
             protection_enabled:
                 type: "boolean"
+            dhcp_available:
+                type: "boolean"
             querylog_enabled:
                 type: "boolean"
             running: