Add option to handle pbufs instead of buffers

src/AsyncTCP.h

@@ -25,7 +25,8 @@
 #include "IPAddress.h"
 #include <functional>
 extern "C" {
-#include "freertos/semphr.h"
+    #include "freertos/semphr.h"
+    #include "lwip/pbuf.h"
 }
 
 class AsyncClient;
@@ -38,10 +39,10 @@ typedef std::function<void(void*, AsyncClient*)> AcConnectHandler;
 typedef std::function<void(void*, AsyncClient*, size_t len, uint32_t time)> AcAckHandler;
 typedef std::function<void(void*, AsyncClient*, int8_t error)> AcErrorHandler;
 typedef std::function<void(void*, AsyncClient*, void *data, size_t len)> AcDataHandler;
+typedef std::function<void(void*, AsyncClient*, struct pbuf *pb)> AcPacketHandler;
 typedef std::function<void(void*, AsyncClient*, uint32_t time)> AcTimeoutHandler;
 
 struct tcp_pcb;
-struct pbuf;
 struct _ip_addr;
 
 class AsyncClient {
@@ -58,6 +59,8 @@ class AsyncClient {
     void* _error_cb_arg;
     AcDataHandler _recv_cb;
     void* _recv_cb_arg;
+    AcPacketHandler _pb_cb;
+    void* _pb_cb_arg;
     AcTimeoutHandler _timeout_cb;
     void* _timeout_cb_arg;
     AcConnectHandler _poll_cb;
@@ -141,10 +144,13 @@ class AsyncClient {
     void onDisconnect(AcConnectHandler cb, void* arg = 0);  //disconnected
     void onAck(AcAckHandler cb, void* arg = 0);             //ack received
     void onError(AcErrorHandler cb, void* arg = 0);         //unsuccessful connect or error
-    void onData(AcDataHandler cb, void* arg = 0);           //data received
+    void onData(AcDataHandler cb, void* arg = 0);           //data received (called if onPacket is not used)
+    void onPacket(AcPacketHandler cb, void* arg = 0);       //data received
     void onTimeout(AcTimeoutHandler cb, void* arg = 0);     //ack timeout
     void onPoll(AcConnectHandler cb, void* arg = 0);        //every 125ms when connected
 
+    void ackPacket(struct pbuf * pb);
+
     const char * errorToString(int8_t error);
     const char * stateToString();