//NTP协议 typedef struct _NTP_HEADER { uint8_t _flags;//Flags 0xdb uint8_t _pcs;//Peer Clock Stratum uint8_t _ppt;//Peer Polling Interval uint8_t _pcp;//Peer Clock Precision uint32_t _rdy;//Root Delay uint32_t _rdn;//Root Dispersion uint32_t _rid;//Reference ID uint64_t _ret;//Reference Timestamp uint64_t _ort;//Origin Timestamp uint64_t _rct;//Receive Timestamp uint64_t _trt;//Transmit Timestamp }ntp_header,*pntp_header; //MAC协议 typedef struct _MAC_HEADER { unsigned char dstmac[6];//目的MAC unsigned char srcmac[6];//源MAC unsigned short type;//协议 }mac_header,*pmac_header; //ARP协议 typedef struct _ARP_HEADER { unsigned short hardware;//硬件类型 unsigned short protocol;//协议类型 unsigned char hardwarelen;//硬件地址长度(6) unsigned char protocollen;//协议地址长度(4) unsigned short operate;//操作类型(1-ARP请求 2-ARP应答 3-RARP请求 4-RARP应答) unsigned char sendmac[6];//发送端MAC地址 in_addr sendip;//发送端IP地址 unsigned char dstmac[6];//目的端MAC地址 in_addr dstip;//目的端IP地址 }arp_header,*parp_header; //RARP协议 typedef struct _RARP_HEADER { unsigned short hardware;//硬件类型 unsigned short protocol;//协议类型 unsigned char hardwarelen;//硬件地址长度(6) unsigned char protocollen;//协议地址长度(4) unsigned short operate;//操作类型(1-ARP请求 2-ARP应答 3-RARP请求 4-RARP应答) unsigned char sendmac[6];//发送端MAC地址 unsigned char sendip[4];//发送端IP地址 unsigned char dstmac[6];//目的端MAC地址 unsigned char dstip[4];//目的端IP地址 }rarp_header,prarp_header; //IP协议 typedef struct _IP_HEADER { unsigned char headerlen:4; //首部长度 unsigned char version:4; //版本 unsigned char tos; //服务类型 unsigned short total_len; //总长度 unsigned short id; //标志 unsigned short frag_off; //分片偏移 unsigned char ttl; //生存时间 unsigned char protocol; //协议 unsigned short chk_sum; //检验和 struct in_addr srcaddr; //源IP地址 struct in_addr dstaddr; //目的IP地址 }ip_header,*pip_header; //TCP协议 typedef struct _TCP_HEADER { unsigned short srcport;//源端口 unsigned short dstport;//目的端口 unsigned int seq_no;//序列号 unsigned int ack_no;//确认号 unsigned char reserved_1:4;//保留位 unsigned char headerlen:4;//协议头长度 unsigned char flag:6;//6位标志 unsigned char reserved_2:2;//保留位 unsigned short wnd_size;//窗口大小 unsigned short chk_sum;//校验和 unsigned short urgt_p;//紧急指针 }tcp_header,*ptcp_header; //UDP协议 typedef struct _UDP_HEADER { unsigned short srcport;//源端口号 unsigned short dstport;//目的端口号 unsigned short headerlen;//UDP长度 unsigned short chk_sum;//校验和 }udp_header,*pudp_header; //ICMP协议 typedef struct _ICMP_HEADER { unsigned char type;//类型 unsigned char code;//代码 unsigned short chk_sum;//校验和 }icmp_header,*picmp_header; //IGMP typedef struct _IGMP_HEADER { unsigned char type:4;//类型 unsigned char version:4;//版本 unsigned char reserved;//未用 unsigned short chk_sum;//校验和 in_addr addr;//D类IP地址 }igmp_header,*pigmp_header;
posted on
