Fixing timout logic

src/dolphin_daemon/include/NetlinkSocket.hpp

@@ -113,11 +113,12 @@ class NetlinkSocket
             msg.msg_iov = &iov;
             msg.msg_iovlen = 1;
 
-            size_t ret = ::recvmsg(_sock_fd, &msg, 0);
+            ssize_t ret = ::recvmsg(_sock_fd, &msg, 0);
             if( ret > 0)
                 memcpy(data, NLMSG_DATA(nlh), ret - NLMSG_HDRLEN);
+                return ret - NLMSG_HDRLEN; //Return size of data
 
-            return ret - NLMSG_HDRLEN;
+            return ret;//Return error code
         }
 
 

src/dolphin_daemon/src/DolphinKernelProxy.cpp

@@ -37,17 +37,17 @@ DolphinKernelProxy::DolphinKernelProxy()
 void DolphinKernelProxy::thread_body()
 {
 
-    int ret;
+    ssize_t ret;
     char buffer[MAX_PAYLOAD] = {0};
 
     while( !should_stop() )
     {
         ret = _requests_socket->recvmsg(buffer, MAX_PAYLOAD);
 
-        if(ret == -1) continue; //Timout
-
         if (ret < 0)
         {
+            if((errno == EAGAIN) || (errno == EWOULDBLOCK)) continue; //Timout
+
             spdlog::warn("DolphinKernelProxy - Error {}, when receiving netlink multicast message from group {}", 
                          ret, NETLINK_GROUP_NUM);
             continue;