--- a/xsocket.c	Tue Jun 16 17:16:11 2015 +0200
+++ b/xsocket.c	Tue Jun 16 17:19:15 2015 +0200
@@ -1,7 +1,10 @@
 #ifdef _CVI_
 #include <winsock2.h>
+#include <toolbox.h>
+#include <lowlvlio.h>
 #include <ansi_c.h>
 #define strdup(s) StrDup(s)
+#define ERRNO 1
 #else
 #include <stdio.h>
 #include <stdlib.h>
@@ -16,22 +19,11 @@
 #include <ctype.h>
 #include <math.h>
 #include <stdarg.h>
+#define ERRNO errno
 #endif
 
 #include "xsocket.h"
 
-#define XRETRY(code)								\
-	({												\
-		int __r, __n = 0;							\
-		while (__n++ < 2) {							\
-			__r = (code);							\
-			if (__r != -EAGAIN)						\
-				break;								\
-		}											\
-		__r;										\
-	})
-
-
 struct xsocket * xsocket(const char *hostname, const int port)
 {
 	struct xsocket *s = malloc(sizeof(struct xsocket));
@@ -62,11 +54,11 @@
 
 	host = gethostbyname(s->hostname);
 	if (host == NULL)
-		return -errno;
+		return -ERRNO;
 	
 	sock = socket(AF_INET, SOCK_STREAM, 0);
 	if (sock < 0)
-		return -errno;
+		return -ERRNO;
 	
 	addr.sin_family = host->h_addrtype;
 	memcpy(&addr.sin_addr.s_addr, host->h_addr_list[0], host->h_length);
@@ -74,7 +66,7 @@
 
 	r = connect(sock, (struct sockaddr*)&addr, sizeof(addr));
 	if (r < 0)
-		return -errno;
+		return -ERRNO;
 	
 	s->fd = sock;
 	return 0;
@@ -91,7 +83,7 @@
 	
 	r = send(s->fd, data, len, 0);
 	if (r < 0)
-		return -errno;
+		return -ERRNO;
 
 	return r;
 }
@@ -103,7 +95,7 @@
 	
 	r = recv(s->fd, buffer, len, 0);
 	if (r < 0)
-		return -errno;
+		return -ERRNO;
 	if (r == 0) {
 		close(s->fd);
 		s->fd = -1;
@@ -114,18 +106,20 @@
 }
 
 
-static inline int __exchange(struct xsocket *s, const char *out, size_t outlen, char *in, size_t inlen)
+static inline int __talk(struct xsocket *s, const char *out, size_t outlen, char *in, size_t inlen)
 {
-	int r;
-
-	r = xsend(s, out, outlen);
-	if (r < 0)
-		return r;
+	int r = 0, n = 0;
+	
+	while (n++ < 2) {
+		r = xsend(s, out, outlen);
+		if (r < 0)
+			return r;
 		
-	r = xrecv(s, in, inlen);
-	if (r < 0)
-		return r;
-
+		r = xrecv(s, in, inlen);
+		if ((r < 0) && (r != -EAGAIN))
+			return r;
+	}
+	
 	return r;
 }
 
@@ -140,7 +134,7 @@
 	data[len++] = '\r';
 	data[len++] = '\n';
 
-	r = XRETRY(__exchange(s, data, len, buffer, bufferlen));
+	r = __talk(s, data, len, buffer, bufferlen);
 	if (r < 0)
 		return r;
 
@@ -164,7 +158,7 @@
 	buffer[len++] = '\r';
 	buffer[len++] = '\n';
 
-	r = XRETRY(__exchange(s, buffer, len, buffer, sizeof(buffer)));
+	r = __talk(s, buffer, len, buffer, sizeof(buffer));
 	if (r < 0)
 		return r;