ethernet packet sniffer

Use Python to write network packet sniffer (Code a networks packet sniffer in Python for Linux) by Silver Moon Basic SnifferSniffers is programs that can capture/sniff/detect network traffic packet by packet and analyse them for v

calculation. For Gigabit Ethernet, the calculation is as follows: 1,000,000,000bps/8bit/(64+8+12) Byte=1,488,095pps Description: When the Ethernet frame is 64byte, it is necessary to consider the fixed overhead of the 8byte frame head and the 12byte frame gap. Therefore, a wire-speed Gigabit Ethernet port in the forwarding 64byte

Layer-3 Ethernet switches are quite common, so I have studied the problems related to the CPU packet sending and receiving of layer-3 Ethernet switches. I would like to share them with you here, hoping they will be useful to you. Layer-3 Ethernet switches are developing rapidly. On the one hand, bandwidth and switching

First, about the minimum length of Ethernet packets in Wireshark, see the following text:Packet FormatA Physical Ethernet Packet would look like this: preamble destination MAC address source MAC address type/length user Data frame Check Sequence (FCS) 8 6 6

This article describes the use of Pf_packet and Sock_raw to send themselves a defined type Ethernet packet, using the Wireshare capture packet to get to the packet and pave the line for adding a network protocol to the Linux kernel.First on the code:#include #include #include #include #include #include #include #includ

TCP/IPA protocol is a complex set of protocols. There are many professional books. Here, I will only introduce the layer structure of TCP/IP protocol and its message format that are closely related to programming. We know that TCP/IP uses a layered structure. The hierarchical model and Protocol are as follows: Application Layer(Application) HTTP, telnet, FTP, SMTP, SNMP Transmission Layer(Transport) TCP and UDP Inter-network layer(Internet) IP Address [ARP, R

Ethernet Protocol packet structureThe MAC address of both sides of the Ethernet packet must be set. The sender is the MAC address of the NIC of the local computer,The recipient is the MAC address of the gateway 192.168.1.1 (obtained through ARP ). The maximum length of an Ethernet