100 lines
2.5 KiB
C
100 lines
2.5 KiB
C
#ifndef _PACKETSTRUCT_H
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#define _PACKETSTRUCT_H
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#pragma pack(1)
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/*以太网帧头格式结构体 14个字节*/
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typedef struct ether_header
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{
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unsigned char ether_dhost[6];// 目的MAC地址
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unsigned char ether_shost[6];// 源MAC地址
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unsigned short ether_type;// eh_type的值需要考察上一层的协议，如果为ip则为0×0800
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}ETHERHEADER, *PETHERHEADER;
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/*以ARP字段结构体 28个字节*/
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typedef struct arp_header
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{
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unsigned short arp_hrd;
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unsigned short arp_pro;
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unsigned char arp_hln;
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unsigned char arp_pln;
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unsigned short arp_op;
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unsigned char arp_sourha[6];
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unsigned long arp_sourpa;
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unsigned char arp_destha[6];
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unsigned long arp_destpa;
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}ARPHEADER, *PARPHEADER;
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/*ARP报文结构体 42个字节*/
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typedef struct arp_packet
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{
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ETHERHEADER etherHeader;
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ARPHEADER arpHeader;
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}ARPPACKET, *PARPPACKET;
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// ipv4_pro字段：
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#define PROTOCOL_ICMP 0x01
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#define PROTOCOL_IGMP 0x02
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#define PROTOCOL_TCP 0x06
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#define PROTOCOL_UDP 0x11
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/*IPv4报头结构体 20个字节*/
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typedef struct ipv4_header
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{
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unsigned char ipv4_ver_hl;// Version(4 bits) + Internet Header Length(4 bits)长度按4字节对齐
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unsigned char ipv4_stype; // 服务类型
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unsigned short ipv4_plen;// 总长度（包含IP数据头，TCP数据头以及数据）
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unsigned short ipv4_pidentify;// ID定义单独IP
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unsigned short ipv4_flag_offset;// 标志位偏移量
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unsigned char ipv4_ttl; // 生存时间
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unsigned char ipv4_pro;// 协议类型
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unsigned short ipv4_crc;// 校验和
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unsigned long ipv4_sourpa;// 源IP地址
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unsigned long ipv4_destpa;// 目的IP地址
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}IPV4HEADER, *PIPV4HEADER;
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/*IPv6报头结构体 40个字节*/
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typedef struct ipv6_header
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{
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unsigned char ipv6_ver_hl;
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unsigned char ipv6_priority;
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unsigned short ipv6_lable;
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unsigned short ipv6_plen;
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unsigned char ipv6_nextheader;
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unsigned char ipv6_limits;
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unsigned char ipv6_sourpa[16];
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unsigned char ipv6_destpa[16];
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}IPV6HEADER, *PIPV6HEADER;
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/*TCP报头结构体 20个字节*/
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typedef struct tcp_header
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{
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unsigned short tcp_sourport;//源端口
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unsigned short tcp_destport;//目的端口
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unsigned long tcp_seqnu;//序列号
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unsigned long tcp_acknu;//确认号
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unsigned char tcp_hlen; //4位首部长度
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unsigned char tcp_reserved;//标志位
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unsigned short tcp_window;//窗口大小
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unsigned short tcp_chksum;//检验和
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unsigned short tcp_urgpoint;//紧急指针
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}TCPHEADER, *PTCPHEADER;
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/*UDP报头结构体 8个字节*/
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typedef struct udp_header
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{
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unsigned short udp_sourport;// 源端口
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unsigned short udp_destport;// 目的端口
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unsigned short udp_hlen;// 长度
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unsigned short udp_crc;// 校验和
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}UDPHEADER, *PUDPHEADER;
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#pragma pack()
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#endif |