tcp-ip

问题 i want to send raw bytes using Rubys TCPSocket-Class. Has someone a good example? I've tried it in this way, but it does not work :( require 'socket' host = '192.168.0.80' port = 102 s = TCPSocket.new(host, port) s.write [0x03, 0x00, 0x00, 0x16, 0x11, 0xE0, 0x00, 0x00, 0x00, 0x01, 0x00, 0xC1, 0x02, 0x02, 0x02, 0xC2, 0x02, 0x02, 0x02, 0xC0, 0x01, 0x0A ].pack('C') puts s.read s.close puts "exit" thanks :) 回答1: Try using a "*" after the format directive to eat all the elements in the list: s

问题 A mac address is of only 48 bits. That means there can be only 2 power 48 mac addresses. If for every computer/laptops if the mac address is unique, then there can be only 2 power 48 computers/laptops which is contradicting!! help me out 来源： https://stackoverflow.com/questions/39038010/limitation-of-mac-addresses

问题 I am using Lapsnapper (a transponder timing system) running on Android. Lapsnapper enables a TCP/IP server with which a connection can be made, to build a custom interface and get some other relevant data RE: the transponders etc from the system. I do not understand the Lapsnapper tcp server specification. I have done some tcp stuff before, but I am mostly a higher level programmer and to be honest I am a bit out of my depth with this raw TCP stuff. The spec reads: What I don't understand is

问题 I have 2 different machines running ubuntu on virtual box and i'm trying to run a server on one machine and connect with the client from another machine . However I am not able to connect due to the fact that the IP adress given from the virtual box machine is very strange that is 10.x.x.x . I am managing to run both programs one as ./server and the other ./client localhost 2017 on the same virtual box machine however not on different machines .. I am trying to run the client using ./client

问题 I have 2 different machines running ubuntu on virtual box and i'm trying to run a server on one machine and connect with the client from another machine . However I am not able to connect due to the fact that the IP adress given from the virtual box machine is very strange that is 10.x.x.x . I am managing to run both programs one as ./server and the other ./client localhost 2017 on the same virtual box machine however not on different machines .. I am trying to run the client using ./client

问题 I have to create a tcp client 1)-which will send request msg to server and receive response for it 2)- Some time the server push msg to the client without any request from clientSo client should accept and read it . So I have already asked the question for the 1 part of it My tcp client using spring integration not able to get response and tried to reach some solution .But for second part i am confused what to use tcpoutbound gateway or inboundgateway with client flag enable. Kindly suggest

问题 Are there any reasons why Go Back N would be preferred over selective repeat for pipelined error recovery ? Clearly, SR needs a buffer (appropriately sized) at the receiver's end, is that its only weakness ? Any situation where GBN would be exclusively preffered? 回答1: My answer might not be too relevant to your question, but it focuses on receive buffer problem of Selective Repeat. Selective Repeat is much more smart and efficient way of dealing with unreliability of UDP. But only if it's

问题 Is there any way for my TCP/IP listener to detect if there are currently conencted client? This is my code: Public Sub StopListen() client.Close() tcpClientThread.Abort() server.Stop() SyncLock accessLock endThread = True End SyncLock Btn_Listen.Text = "Listen" End Sub The problem in that code is whenever the user pressed the Stop Listen button and there are currently no cients connected to my listener an error occurs. How can I do something like this? Public Sub StopListen() If

问题 I have a legacy TCP/IP service which listens for a message in a proprietary format on a socket. When the service receives the message, it processes it and replies with a message in a similar format, (classic request/reply situation). We cannot change the client calling the legacy service and we want to replace the legacy service with a new one hosted in IIS using WCF and C#. How do I implement this in WCF? Is it even possible to make WCF understand the proprietary message format? If not then

问题 HELP! I'm Going Crazy! I'm using a Visual Basic 6.0 Winsock for the server. I'm able to keep an active connection and I even receive from my Android App to the VB App "VER:Android,LAT:28.111921,LNG:-81.950433,ID:1038263,SND:0,VDO:0"> Which I parse and put the data in their fields. After my initial connection I try to send a simple message from VB to the Server and I never receive it. What I do notice whenever I close my VB.NET app I recieve this in my LogCat: 11-26 15:38:16.567: I/TcpClient