gras_msg_send_(sock, gras_msgtype_by_name("chunk"), &chunk);
XBT_INFO("Done sending %.f bytes to %s", cmd->d_arg, cmd->str_arg);
gras_msg_send_(sock, gras_msgtype_by_name("chunk"), &chunk);
XBT_INFO("Done sending %.f bytes to %s", cmd->d_arg, cmd->str_arg);