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...
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...
Indicates the MAC address of the message sender. 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 ...
ARPPACKET ARPPacket; // 定义ARPPACKET结构体变量 memset(&ARPPacket, 0, sizeof(ARPPACKET)); // 数据包初始化 formatStrToMAC(“DLC源MAC字符串”,ARPPacket.dlcHeader.SrcMAC); // DLC帧头 formatStrToMAC(“DLC目的MAC字符串”,ARPPacket.dlcHeader.DesMAC); formatStrToMAC(“ARP源MAC字符串”,ARP...
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...
If they are different, the switch discards the packet. Destination MAC address: The switch compares the destination MAC address in the ARP packet with that in the Ethernet frame header. If they are the same, the switch considers the packet valid. If they are different, the switch discards ...
在Linux 系统上, 可以通过PF_PACKET创建由用户态程序收发数据链接层数据的 Packet Socket, 从而发送完全自定义的 ARP 报文。但是在基于 BSD 的系统(比如 MacOS) 上, 是不支持PF_PACKET类型的 Socket 的,这时候就要利用 BPF(Berkeley Packet Filter)伯克利包过滤器来实现原始链路层数据的收发. ——BPF ...
Edge-1#show device-tracking database interface g1/0/3portDB has 2 entries for interface Gi1/0/3, 2 dynamic Codes: L - Local, S - Static, ND - Neighbor Discovery, ARP - Address Resolution Protocol, DH4 - IPv4 DHCP, DH6 - IPv6 DHCP, PKT - Other Packet, API - API created P...
The message header specifies these types, as well as the size of addresses of each. The message header is completed with the operation code for request (1) and reply (2). The payload of the packet consists of four addresses, the hardware and protocol address of the sender and receiver ...
PacketCapture.Definition PacketCapture.DefinitionStages PacketCapture.DefinitionStages.WithCreate PacketCapture.DefinitionStages.WithCreateAndStoragePath PacketCapture.DefinitionStages.WithStorageLocation PacketCapture.DefinitionStages.WithTarget PacketCaptureFilter PacketCaptureListResult PacketCaptureMachineScope PacketCap...