many changes

net/DNS.h

@@ -0,0 +1,69 @@
+#ifndef DNS_H
+#define DNS_H
+
+#include "../Platforms.h"
+#include "../Debug.h"
+
+typedef void (*DNSResolveCallback)(const char* name, const ip_addr_t* ip, void* arg);
+
+#if ESP8266
+	class DNS {
+
+		static constexpr const char* NAME = "DNS";
+
+		espconn dns;
+		ip_addr_t ip;
+
+		DNSResolveCallback callback;
+		void* arg;
+
+	public:
+
+		/** resolve hostname. creates callback */
+		void resolveHost(const char* c, DNSResolveCallback callback, void* arg) {
+			debugMod1(NAME, "dns lookup: %s", c);
+			this->callback = callback;
+			this->arg = arg;
+			dns.reverse = (void*) this;
+			espconn_gethostbyname(&dns, c, &ip, _onHostResolved);
+		}
+
+		static void _onHostResolved(const char* name, const ip_addr_t* ipaddr, void* arg) {
+			debugMod1(NAME, "dns resolved: %s", c);
+			DNS* dns = (DNS*) arg;
+			dns->callback(name, ipaddr, dns->arg);
+		}
+
+	};
+#elif ESP32
+
+	#include <lwip/dns.h>
+
+	class DNS {
+
+		static constexpr const char* NAME = "DNS";
+		ip_addr_t ip;
+		DNSResolveCallback callback;
+		void* arg;
+
+	public:
+
+		/** resolve hostname. creates callback */
+		void resolveHost(const char* host, DNSResolveCallback callback, void* arg) {
+			debugMod1(NAME, "dns lookup: %s", host);
+			this->callback = callback;
+			this->arg = arg;
+			dns_gethostbyname(host, &ip, _onHostResolved, this);
+		}
+
+		static void _onHostResolved(const char* name, const ip_addr_t* ipaddr, void* arg) {
+			debugMod1(NAME, "dns resolved: %s", name);
+			DNS* dns = (DNS*) arg;
+			dns->callback(name, ipaddr, dns->arg);
+		}
+
+	};
+
+#endif
+
+#endif // DNS_H