ethernet | 易学教程

Arduino Ethernet Shield Not Connecting to WebServer

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问题 I have a problem making my Arduino Ethernet shield to communicate with the server, the result on the serial monitor is always: my arduino code is #include <Ethernet.h> //library for ethernet functions #include <SPI.h> #include <Dns.h> #include <Client.h> //library for client functions #include <DallasTemperature.h> //library for temperature sensors // Ethernet settings byte mac[] = {0x09,0xA2,0xDA,0x00,0x01,0x26}; //Replace with your Ethernet shield MAC byte ip[] = { 192,168,0,54}; //The

Filter options for sniff function in scapy

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问题 I'm working on a scapy based tool where at a point I need to sniff a packet based on protocol and the ip address of the destination I'd like to know about the ways in which filter option in sniff() function can be used. I tried using format in documentation but most of the times it results in problems like this. the filter of sniff function in scapy does not work properly . The one which I used was a=sniff(filter="host 172.16.18.69 and tcp port 80",prn = comp_pkt,count = 1) Thanks in advance!

Arduino DHCP failed to configure

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问题 I am using the example ethernet sketch for a web client that comes bundled with the Arduino software without changing a thing except for the firmware address, which I changed to the one printed on the back of the ethernet shield. Whenever I connect the Arduino to my network and view the serial monitor, the only message I get is that it "Failed to configure Ethernet using DHCP". I have setup my Arduino Mega 2560 with an ethernet shield, correctly connecting ports 50 to MISO, 51 to MOSI, 52 to

How to send Ethernet-Frames in Java without TCP/IP Stack

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My Java application should control an external device (EtherCAT Bus technology) directly connected to the network interface of my computer(Ubuntu and Windows). No other network devices are connected. The communication has do be done on Standard IEEE 802.3 Ethernet Frames without IP stack. Example for sending data: int etherType = 0x88A4; // the EtherType registered by IEEE byte[] macBroadcast = new byte[] {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}; byte[] macSource = new byte[] ... ; // MAC Address of my network interface card byte[] buffer = ... // the data to send device.write(macSource,

What do I need to build to directly access the Ethernet frame bits in the kernel level?

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问题 I would like to retrieve the Ethernet Frame bits for all the Ethernet frames on the wire no matter if they are destined (MAC level) for my machine or not. The logic for that has to be at the kernel level. So in order to achieve this do I need to build a separate kernel module or Ethernet driver or Ethernet network interface Note: I have just started learning Linux kernel module development for my project. I'm sorry if it is not the appropriate place to post this question. 回答1: For receiving

Direct connection between laptop and arduino via ethernet

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问题 I made a project with the Arduino and the ethernet-shield. The Arduino is hosting a website which I can open via the browser on my laptop. The Arduino is connected to the router via ethernet. All of this works just fine. Now I have to present this project at school. To prevent unpleasant surprises I wanted to connect the Arduino directly with the laptop via ethernet. My problem is that I am really not well informed about this topic. Please, if possible, tell me what I should do. 回答1: If you

Get ipconfig result with python in windows

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I am new here and just learning python. I need help to get the right mac-address of my network card in windows using python. I tried to search, and found these : Python - Get mac address Getting MAC Address Command output parsing in Python Parsing windows 'ipconfig /all' output If I run "ipconfig /all" from command prompt, I get this : Windows-IP-Konfiguration Hostname . . . . . . . . . . . . : DESKTOP-CIRBA63 Primäres DNS-Suffix . . . . . . . : Knotentyp . . . . . . . . . . . . : Hybrid IP-Routing aktiviert . . . . . . : Nein WINS-Proxy aktiviert . . . . . . : Nein Ethernet-Adapter Ethernet:

Android ethernet configure IP using dhcp [closed]

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I have an android box with ethernet interface. There are no Java classes in android SDK to configure ethernet. As a last resort I am using shell commands to configure ethernet. Could any body please guide me which shell command do I use to configure ethernet? Sample commands will be highly appreciated. Android's got ifconfig, just like Linux. Unfortunately that just changes the interface configuration and doesn't, e.g., tell applications that the interface has come up, so they may not be aware that there's any internet access, so it may not help much. I'm afraid I can't help there. For

Create a layer 2 / ethernet socket with boost asio raw socket (in C++)

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问题 It is fairly easy to create IP, TCP or UDP sockets using boost::asio library. But when it comes to Ethernet sockets for instance, you need to implement boost/asio/basic_raw_socket.hpp As there are no examples of such a thing over the internet and as I spent a long time before finding the answer, I'll put my work-around in here. The most helpful resource I found was: AF_NETLINK (netlink) sockets using boost::asio 回答1: A raw socket can be opened using the generic::raw_protocol stuff: std:

Android udp multicast with Ethernet

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Hello everyone, I'm working on a project with udp multicast. I have a server sending multicast udp packets via an ethernet cable. I have spent weeks of work reading all the posts about multicast on android and I still can't receive any udp packet on my Asus Transformer Tablet, 4.1. For some reasons, I can't put my code here, I will try to explain it carefully. I have a simple MainActivity displaying some stuff. Almost everything is n the Oncreate method, and so is the line where I call a method named UDPreceiver . This method is defined in a class named UDPreceiverClass . In UDPreceiver ,