- (Mar 19 2009) Daniel Stenberg: based on a patch by "E L" we now use errno

properly after recv() and send() calls (that internally are now known as
  _libssh2_recv() and _libssh2_send()) so that the API and more works fine on
  windows too!

src/misc.c

@@ -45,6 +45,71 @@
 #include <sys/time.h>
 #endif
 
+#include <errno.h>
+
+#ifdef WIN32
+static int wsa2errno(void)
+{
+    switch (WSAGetLastError()) {
+    case WSAEWOULDBLOCK:
+        return EAGAIN;
+
+    case WSAENOTSOCK:
+        return EBADF;
+
+    case WSAENOTCONN:
+    case WSAECONNABORTED:
+        return ENOTCONN;
+
+    case WSAEINTR:
+        return EINTR;
+
+    default:
+        /* It is most important to ensure errno does not stay at EAGAIN
+         * when a different error occurs so just set errno to a generic
+         * error */
+        return EIO;
+    }
+}
+#endif
+
+#ifndef _libssh2_recv
+/* _libssh2_recv
+ *
+ * Wrapper around standard recv to allow WIN32 systems
+ * to set errno
+ */
+ssize_t
+_libssh2_recv(int socket, void *buffer, size_t length, int flags)
+{
+    ssize_t rc = recv(socket, buffer, length, flags);
+#ifdef WIN32
+    if (rc < 0 )
+        errno = wsa2errno();
+#endif
+    return rc;
+}
+#endif /* _libssh2_recv */
+
+#ifndef _libssh2_send
+
+/* _libssh2_send
+ *
+ * Wrapper around standard send to allow WIN32 systems
+ * to set errno
+ */
+ssize_t
+_libssh2_send(int socket, const void *buffer, size_t length, int flags)
+{
+    ssize_t rc = send(socket, buffer, length, flags);
+#ifdef WIN32
+    if (rc < 0 )
+        errno = wsa2errno();
+#endif
+    return rc;
+}
+#endif /* _libssh2_recv */
+
 /* libssh2_ntohu32
  */
 unsigned long