add recv error code for clarifying timeout

Author: jman-krafton

net.c

@@ -63,6 +63,10 @@ int redisNetRead(redisContext *c, char *buf, size_t bufcap) {
         if ((errno == EWOULDBLOCK && !(c->flags & REDIS_BLOCK)) || (errno == EINTR)) {
             /* Try again later */
             return 0;
+        } else if(errno == ETIMEDOUT && (c->flags & REDIS_BLOCK)) {
+            /* especially in windows */
+            __redisSetError(c, REDIS_ERR_TIMEOUT, "recv timeout");
+            return -1;
         } else {
             __redisSetError(c, REDIS_ERR_IO, NULL);
             return -1;