Diff: DNSClient/DNSClient.h

Revision:

15:14382459c8b7

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/DNSClient/DNSClient.h	Thu Jun 15 20:29:03 2017 +0000
@@ -0,0 +1,48 @@
+// DNSClient.h 2013/4/5
+#pragma once
+
+#include "UDPSocket.h"
+
+//#define DBG_DNS 1
+ 
+class DNSClient {
+public:
+    DNSClient();
+    DNSClient(NetworkStack *ns, const char* hostname = NULL);
+    DNSClient(NetworkStack *ns, SocketAddress* pHost);
+    
+    int setup(NetworkStack *ns);
+
+    virtual ~DNSClient();
+    bool lookup(const char* hostname);
+    bool set_server(const char* serverip, int port=53);
+    uint32_t get_ip() {return m_ip;}
+    const char* get_ip_address() {return m_ipaddr;}
+    
+protected:
+    void poll();
+    void callback();
+    int response(uint8_t buf[], int size);
+    int query(uint8_t buf[], int size, const char* hostname);
+    void resolve(const char* hostname);
+    uint8_t m_id[2];
+    Timer m_interval;
+    int m_retry;
+    const char* m_hostname;
+
+private:
+    enum MyNetDnsState
+    {
+        MYNETDNS_START,
+        MYNETDNS_PROCESSING, //Req has not completed
+        MYNETDNS_NOTFOUND,
+        MYNETDNS_ERROR,
+        MYNETDNS_OK
+    };
+    MyNetDnsState m_state;
+    UDPSocket *m_udp;
+    NetworkStack *m_ns;
+
+    uint32_t m_ip;
+    char m_ipaddr[24];
+};