+ install: check static ip

* move code to network_utils

+ add tests

'dhcp' package has its own network_utils for now

+ doc: add static ip configuration algorithm on Ubuntu

home/control_install.go

@@ -22,6 +22,14 @@ type firstRunData struct {
 	Interfaces map[string]interface{} `json:"interfaces"`
 }
 
+type netInterfaceJSON struct {
+	Name         string   `json:"name"`
+	MTU          int      `json:"mtu"`
+	HardwareAddr string   `json:"hardware_address"`
+	Addresses    []string `json:"ip_addresses"`
+	Flags        string   `json:"flags"`
+}
+
 // Get initial installation settings
 func handleInstallGetAddresses(w http.ResponseWriter, r *http.Request) {
 	data := firstRunData{}
@@ -36,7 +44,14 @@ func handleInstallGetAddresses(w http.ResponseWriter, r *http.Request) {
 
 	data.Interfaces = make(map[string]interface{})
 	for _, iface := range ifaces {
-		data.Interfaces[iface.Name] = iface
+		ifaceJSON := netInterfaceJSON{
+			Name:         iface.Name,
+			MTU:          iface.MTU,
+			HardwareAddr: iface.HardwareAddr,
+			Addresses:    iface.Addresses,
+			Flags:        iface.Flags,
+		}
+		data.Interfaces[iface.Name] = ifaceJSON
 	}
 
 	w.Header().Set("Content-Type", "application/json")
@@ -48,9 +63,10 @@ func handleInstallGetAddresses(w http.ResponseWriter, r *http.Request) {
 }
 
 type checkConfigReqEnt struct {
-	Port    int    `json:"port"`
-	IP      string `json:"ip"`
-	Autofix bool   `json:"autofix"`
+	Port        int    `json:"port"`
+	IP          string `json:"ip"`
+	Autofix     bool   `json:"autofix"`
+	SetStaticIP bool   `json:"set_static_ip"`
 }
 type checkConfigReq struct {
 	Web checkConfigReqEnt `json:"web"`
@@ -61,9 +77,15 @@ type checkConfigRespEnt struct {
 	Status     string `json:"status"`
 	CanAutofix bool   `json:"can_autofix"`
 }
+type staticIPJSON struct {
+	Static string `json:"static"`
+	IP     string `json:"ip"`
+	Error  string `json:"error"`
+}
 type checkConfigResp struct {
-	Web checkConfigRespEnt `json:"web"`
-	DNS checkConfigRespEnt `json:"dns"`
+	Web      checkConfigRespEnt `json:"web"`
+	DNS      checkConfigRespEnt `json:"dns"`
+	StaticIP staticIPJSON       `json:"static_ip"`
 }
 
 // Check if ports are available, respond with results
@@ -108,6 +130,33 @@ func handleInstallCheckConfig(w http.ResponseWriter, r *http.Request) {
 
 		if err != nil {
 			respData.DNS.Status = fmt.Sprintf("%v", err)
+
+		} else {
+
+			interfaceName := getInterfaceByIP(reqData.DNS.IP)
+			staticIPStatus := "yes"
+
+			if len(interfaceName) == 0 {
+				staticIPStatus = "error"
+				respData.StaticIP.Error = fmt.Sprintf("Couldn't find network interface by IP %s", reqData.DNS.IP)
+
+			} else if reqData.DNS.SetStaticIP {
+				err = setStaticIP(interfaceName)
+				staticIPStatus = "error"
+				respData.StaticIP.Error = err.Error()
+
+			} else {
+				// check if we have a static IP
+				isStaticIP, err := hasStaticIP(interfaceName)
+				if err != nil {
+					staticIPStatus = "error"
+					respData.StaticIP.Error = err.Error()
+				} else if !isStaticIP {
+					staticIPStatus = "no"
+					respData.StaticIP.IP = getFullIP(interfaceName)
+				}
+			}
+			respData.StaticIP.Static = staticIPStatus
 		}
 	}