Try to read a little more

mud.c

@@ -396,6 +396,7 @@ int mud_pull (struct mud *mud)
     struct sock *sock;
 
     for (sock = mud->sock; sock; sock = sock->next) {
+        for (int i = 0; i < 16; i++) {
             unsigned char next = mud->rx.end+1;
 
             if (mud->rx.start == next)
@@ -410,7 +411,7 @@ int mud_pull (struct mud *mud)
                                    0, (struct sockaddr *)&addr, &addrlen);
 
             if (ret <= 0)
-            continue;
+                break;
 
             struct path *path = mud_new_path(mud, sock->fd, &addr, addrlen);
 
@@ -447,6 +448,7 @@ int mud_pull (struct mud *mud)
 
             mud->rx.end = next;
         }
+    }
 
     return 0;
 }