如果在UDP中包含另一个协议,那么UDP payload中又可能包含其他的packet,例如DNS packet。所以发送packet的主机会按照这样的方式构建packet:DNS相关软件想要在UDP协议之上构建一个packet;UDP相关软件会将UDP header挂在DNS packet之前,并在IP协议之上构建另一个packet;IP相关的软件会将IP heade挂在UDP packet之前;最后Ether...
RawPacket = rawArpPacket; } public INetworkLayerHeader getHeader() { Header = new ARPPacketHeader(); Header.HardwareType = (ushort)((ushort)(RawPacket[0] << 8) + (ushort)RawPacket[1]); Header.ProtocalType = (ushort)((ushort)(RawPacket[2] << 8) + (ushort)RawPacket[3]); Header...
打开Windows7将packEth压缩包解压成文件夹后,找到packEth.exe文件双击打开: 打开packEth.exe文件,选择第二个网卡,选择ARP packet模式: 发送方IP和MAC填写网关的真实IP地址和此处修改MAC地址为aa:aa:aa:aa:aa:aa以达到欺骗效果,选择Arp packet功能以及ARP reply 应答包,MAC H...
formatStrToMAC(“ARP目的MAC字符串”,ARPPacket.arpFrame.Targ_HW_Addr); // 目的MAC ARPPacket.arpFrame.Targ_Prot_Addr = inet_addr(desIP); // 目的IP ARPPacket.arpFrame.Opcode = htons((unsigned short)arpType); // arp包类型 // 自动填充的常量 ARPPacket.dlcHeader.Ethertype = htons((unsigne...
//void icmp_protocol_packet_callback(u_char *argument, const struct pcap_pkthdr *packet_header,const u_char *packet_content) //{ // struct icmp_header *icmp_protocol; // icmp_protocol=(struct icmp_header*)(packet_content+14+20); ...
(1)匹配match—使用ingressport,packetheader以及前一个flow table传递过来的metadata; (2)计数counter---对匹配成功的包进行计数; (3)操作instruction—修改actionset或者流水线处理 交换机针对SDN有一个比较重要的消息类型:Packet-In,主要针对未知数据流无法命中流表的时候,作上送控制器的操作。
("Received Packet Size: %d bytes\n",packet_len);printf("Hardware type: %s\n",(ntohs(arpheader->htype)==1)?"Ethernet":"Unknown");printf("Protocol type: %s\n",(ntohs(arpheader->ptype)==0x0800)?"IPv4":"Unknown");printf("Operation : %s\n",(ntohs(arpheader->oper)==ARP_REQUEST)...
no memory to send an arp packet\n"); return; } skb->len = sizeof(struct arphdr) + dev->hard_header_len + 2*(dev->addr_len+4); skb->arp = 1; //表示已完成MAC首部的创建 skb->dev = dev;//绑定设备 skb->free = 1; //数据包发送后立即释放 /* Fill the device header for th...
This field is of the same value as the Ethernet address of destination filed in the ARP packet header. IP Address of Sender 32 bit Indicates the IP address of the message sender. Ethernet Address of Destination 48 bit Indicates the destination MAC address. The value is 0x00.00.00.00....
LOG("Weird! arp header null \r\n"); return NF_ACCEPT; } /* 打印arp首部信息 */ LOG(" arp info :\r\n" "---\r\n" "arp hw type :%x \r\n" "arp pro type :%x \r\n" "arp hln :%d\r\n" "arp plen:%d\r\n" "arp ops :%d\...