package home import ( "encoding/json" "fmt" "net/http" "github.com/AdguardTeam/golibs/log" uuid "github.com/satori/go.uuid" "howett.net/plist" ) type DNSSettings struct { DNSProtocol string ServerURL string `plist:",omitempty"` ServerName string `plist:",omitempty"` } type PayloadContent struct { Name string PayloadDescription string PayloadDisplayName string PayloadIdentifier string PayloadType string PayloadUUID string PayloadVersion int DNSSettings DNSSettings } type MobileConfig struct { PayloadContent []PayloadContent PayloadDescription string PayloadDisplayName string PayloadIdentifier string PayloadRemovalDisallowed bool PayloadType string PayloadUUID string PayloadVersion int } func genUUIDv4() string { return uuid.NewV4().String() } const ( dnsProtoHTTPS = "HTTPS" dnsProtoTLS = "TLS" ) func getMobileConfig(d DNSSettings) ([]byte, error) { var name string switch d.DNSProtocol { case dnsProtoHTTPS: name = fmt.Sprintf("%s DoH", d.ServerName) d.ServerURL = fmt.Sprintf("https://%s/dns-query", d.ServerName) case dnsProtoTLS: name = fmt.Sprintf("%s DoT", d.ServerName) default: return nil, fmt.Errorf("bad dns protocol %q", d.DNSProtocol) } data := MobileConfig{ PayloadContent: []PayloadContent{{ Name: name, PayloadDescription: "Configures device to use AdGuard Home", PayloadDisplayName: name, PayloadIdentifier: fmt.Sprintf("com.apple.dnsSettings.managed.%s", genUUIDv4()), PayloadType: "com.apple.dnsSettings.managed", PayloadUUID: genUUIDv4(), PayloadVersion: 1, DNSSettings: d, }}, PayloadDescription: "Adds AdGuard Home to Big Sur and iOS 14 or newer systems", PayloadDisplayName: name, PayloadIdentifier: genUUIDv4(), PayloadRemovalDisallowed: false, PayloadType: "Configuration", PayloadUUID: genUUIDv4(), PayloadVersion: 1, } return plist.MarshalIndent(data, plist.XMLFormat, "\t") } func handleMobileConfig(w http.ResponseWriter, r *http.Request, dnsp string) { host := r.URL.Query().Get("host") if host == "" { host = Context.tls.conf.ServerName } if host == "" { w.WriteHeader(http.StatusInternalServerError) const msg = "no host in query parameters and no server_name" err := json.NewEncoder(w).Encode(&jsonError{ Message: msg, }) if err != nil { log.Debug("writing 500 json response: %s", err) } return } d := DNSSettings{ DNSProtocol: dnsp, ServerName: host, } mobileconfig, err := getMobileConfig(d) if err != nil { httpError(w, http.StatusInternalServerError, "plist.MarshalIndent: %s", err) return } w.Header().Set("Content-Type", "application/xml") _, _ = w.Write(mobileconfig) } func handleMobileConfigDOH(w http.ResponseWriter, r *http.Request) { handleMobileConfig(w, r, dnsProtoHTTPS) } func handleMobileConfigDOT(w http.ResponseWriter, r *http.Request) { handleMobileConfig(w, r, dnsProtoTLS) }