Server now checks the connection and correctly closes the clients file descriptor if the client exits silently

src/DAP_config.h

@@ -86,7 +86,7 @@ Provides definitions about:
 /// This configuration settings is used to optimized the communication performance with the
 /// debugger and depends on the USB peripheral. For devices with limited RAM or USB buffer the
 /// setting can be reduced (valid range is 1 .. 255). Change setting to 4 for High-Speed USB.
-#define DAP_PACKET_COUNT        64              ///< Buffers: 64 = Full-Speed, 4 = High-Speed.
+#define DAP_PACKET_COUNT        1              ///< Buffers: 64 = Full-Speed, 4 = High-Speed.
 
 
 /// Debug Unit is connected to fixed Target Device.

src/socket_ipc.c

@@ -108,6 +108,7 @@ void wait_for_client(void) {
 	if(flags < 0 ){
 		flags = 0;
 	}
+	/* TODO change nonblocking to a timed out read */
 	if( fcntl(csockfd, F_SETFL, flags | O_NONBLOCK) < 0 ){
 		DEBUGF("ERROR seting non-blocking: %s\n", strerror(errno));
 	}
@@ -178,7 +179,13 @@ void process_data(void) {
 		}
 	}else if( n<0 ){
 		switch( errno ) {
-			case EAGAIN: break;
+			case EAGAIN:
+				/* try to write an empty message to check connection */
+				n = write(csockfd,NULL,0);
+				if( n == 0 ){
+					break;
+				}
+				/*no break*/
 			default:
 				DEBUGF("A problem occured: %d %d %s\n", n, errno,strerror(errno) );
 				DEBUG("Closing connection!\n");