adding a few new features to the packet format

* can now specify the TTL programmatically
* can now define the device type urn (up to 64 chars)
** still defaults to `Basic:1`
* can now set the serial number using a `uint32_t`, formatted as %08X

libraries/ESP8266SSDP/ESP8266SSDP.cpp

@@ -89,7 +89,7 @@ static const char* _ssdp_schema_template =
     "</specVersion>"
     "<URLBase>http://%u.%u.%u.%u:%u/</URLBase>" // WiFi.localIP(), _port
     "<device>"
-      "<deviceType>urn:schemas-upnp-org:device:Basic:1</deviceType>"
+      "<deviceType>%s</deviceType>"
       "<friendlyName>%s</friendlyName>"
       "<presentationURL>%s</presentationURL>"
       "<serialNumber>%s</serialNumber>"
@@ -128,6 +128,7 @@ SSDPClass::SSDPClass() :
 _server(0),
 _timer(new SSDPTimer),
 _port(80),
+_ttl(SSDP_MULTICAST_TTL),
 _respondToPort(0),
 _pending(false),
 _delay(0),
@@ -136,6 +137,7 @@ _notify_time(0)
 {
   _uuid[0] = '\0';
   _modelNumber[0] = '\0';
+  sprintf(_deviceType, "urn:schemas-upnp-org:device:Basic:1");
   _friendlyName[0] = '\0';
   _presentationURL[0] = '\0';
   _serialNumber[0] = '\0';
@@ -185,7 +187,7 @@ bool SSDPClass::begin(){
   }
 
   _server->setMulticastInterface(ifaddr);
-  _server->setMulticastTTL(SSDP_MULTICAST_TTL);
+  _server->setMulticastTTL(_ttl);
   _server->onRx(std::bind(&SSDPClass::_update, this));
   if (!_server->connect(multicast_addr, SSDP_PORT)) {
     return false;
@@ -239,6 +241,7 @@ void SSDPClass::schema(WiFiClient client){
   uint32_t ip = WiFi.localIP();
   client.printf(_ssdp_schema_template,
     IP2STR(&ip), _port,
+    _deviceType,
     _friendlyName,
     _presentationURL,
     _serialNumber,
@@ -365,6 +368,10 @@ void SSDPClass::setHTTPPort(uint16_t port){
   _port = port;
 }
 
+void SSDPClass::setDeviceType(const char *deviceType){
+  strlcpy(_deviceType, deviceType, sizeof(_deviceType));
+}
+
 void SSDPClass::setName(const char *name){
   strlcpy(_friendlyName, name, sizeof(_friendlyName));
 }
@@ -377,6 +384,10 @@ void SSDPClass::setSerialNumber(const char *serialNumber){
   strlcpy(_serialNumber, serialNumber, sizeof(_serialNumber));
 }
 
+void SSDPClass::setSerialNumber(const uint32_t serialNumber){
+  snprintf(_serialNumber, sizeof(uint32_t), "%08X", serialNumber);
+}
+
 void SSDPClass::setModelName(const char *name){
   strlcpy(_modelName, name, sizeof(_modelName));
 }
@@ -397,6 +408,10 @@ void SSDPClass::setManufacturerURL(const char *url){
   strlcpy(_manufacturerURL, url, sizeof(_manufacturerURL));
 }
 
+void SSDPClass::setTTL(const uint8_t ttl){
+  _ttl = ttl;
+}
+
 void SSDPClass::_onTimerStatic(SSDPClass* self) {
   self->_update();
 }

libraries/ESP8266SSDP/ESP8266SSDP.h

@@ -37,6 +37,7 @@ class UdpContext;
 
 #define SSDP_UUID_SIZE              37
 #define SSDP_SCHEMA_URL_SIZE        64
+#define SSDP_DEVICE_TYPE_SIZE       64
 #define SSDP_FRIENDLY_NAME_SIZE     64
 #define SSDP_SERIAL_NUMBER_SIZE     32
 #define SSDP_PRESENTATION_URL_SIZE  128
@@ -64,6 +65,8 @@ class SSDPClass{
 
     void schema(WiFiClient client);
 
+    void setDeviceType(const String& deviceType) { setDeviceType(deviceType.c_str()); }
+    void setDeviceType(const char *deviceType);
     void setName(const String& name) { setName(name.c_str()); }
     void setName(const char *name);
     void setURL(const String& url) { setURL(url.c_str()); }
@@ -72,6 +75,7 @@ class SSDPClass{
     void setSchemaURL(const char *url);
     void setSerialNumber(const String& serialNumber) { setSerialNumber(serialNumber.c_str()); }
     void setSerialNumber(const char *serialNumber);
+    void setSerialNumber(const uint32_t serialNumber);
     void setModelName(const String& name) { setModelName(name.c_str()); }
     void setModelName(const char *name);
     void setModelNumber(const String& num) { setModelNumber(num.c_str()); }
@@ -83,6 +87,7 @@ class SSDPClass{
     void setManufacturerURL(const String& url) { setManufacturerURL(url.c_str()); }
     void setManufacturerURL(const char *url);
     void setHTTPPort(uint16_t port);
+    void setTTL(uint8_t ttl);
 
   protected:
     void _send(ssdp_method_t method);
@@ -93,6 +98,7 @@ class SSDPClass{
     UdpContext* _server;
     SSDPTimer* _timer;
     uint16_t _port;
+    uint8_t _ttl;
 
     IPAddress _respondToAddr;
     uint16_t  _respondToPort;
@@ -104,6 +110,7 @@ class SSDPClass{
 
     char _schemaURL[SSDP_SCHEMA_URL_SIZE];
     char _uuid[SSDP_UUID_SIZE];
+    char _deviceType[SSDP_DEVICE_TYPE_SIZE];
     char _friendlyName[SSDP_FRIENDLY_NAME_SIZE];
     char _serialNumber[SSDP_SERIAL_NUMBER_SIZE];
     char _presentationURL[SSDP_PRESENTATION_URL_SIZE];