Hi, all: I wrote a Linux Networking module, and tried send my own sk_buff out. It seemed success, but a little strange (maybe much strange?). If I insmod my module, and use tcpdump to monitor network situation, I would see some messages like"0008 buggy protocol" in my kernel. But if I don't use tcpdump, then there's no such messages in my kernel. Strange, Hmmmm.....Could anyone tell me is this my module's bug??? Best regards! Yi-Wen - : send the line "unsubscribe linux-net" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html