yaxf999的专栏

对DNS报文的理解  2009-07-01 18:14:43|  分类：电脑(信息区) |  标签：|字号大中小 订阅本人是在windows 上使用nslookup工具来产生的dns通信，见上图。-----------------------------dns查询报文------------------------------------ 首先是

// *pTemp为GRE报文头指针unsigned char getGreHdrLen(unsigned char *pTemp){    unsigned char greflags1 = *(pTemp);    unsigned char greflags2 = *(pTemp + 1);    unsigned char sequence_num = (greflag