摘要：
//Mac头部，总长度14字节typedef struct _eth_hdr{unsigned char dstmac[6]; //目标mac地址unsigned char srcmac[6]; //源mac地址unsigned short eth_type; //以太网类型}eth_hdr;//IP头部，总长度20字节typedef struct _ip_hdr{#if LITTLE_ENDIANunsigned char ihl:4; //首部长度unsigned char version:4, //版本#else www.2cto.com unsigned char version:4. 阅读全文
