tcp-ip

How much memory is consumed by the Linux kernel per TCP/IP network connection?

由 可紊 提交于 2019-11-27 05:10:51
问题 How much memory on average is consumed by the Linux kernel (in kernel address space) per TCP/IP network connection? 回答1: For a TCP connection memory consumed depends on size of sk_buff (internal networking structure used by linux kernel) the read and write buffer for a connection the size of buffers can be tweaked as required root@x:~# sysctl -A | grep net | grep mem check for these variables these specify the maximum default memory buffer usage for all network connections in kernel net.core

Why is network-byte-order defined to be big-endian? [closed]

由 落爺英雄遲暮 提交于 2019-11-27 03:02:53
As written in the heading, my question is, why does TCP/IP use big endian encoding when transmitting data and not the alternative little-endian scheme? RFC1700 stated it must be so . (and defined network byte order as big-endian). The convention in the documentation of Internet Protocols is to express numbers in decimal and to picture data in "big-endian" order [COHEN]. That is, fields are described left to right, with the most significant octet on the left and the least significant octet on the right. The reference they make is to On Holy Wars and a Plea for Peace Cohen, D. Computer The

If BufReader takes ownership of a stream, how can I read and write lines on it?

由 谁说胖子不能爱 提交于 2019-11-26 17:49:27
问题 I want to read a line from a TCPStream , write another line to it, and then repeat. The issue is that BufReader::new takes ownership of my TCPStream variable: let stream = ...; // TCPStream let reader = BufReader::new(stream); // moved its value // can't use stream here anymore What is a simple solution to this? 回答1: Solution: use references. let mut stream = ...; let reader = BufReader::new(&stream); let writer = BufWriter::new(&stream); Explanation If we take a closer look at BufReader::new

How to get all data from NetworkStream

由 孤街醉人 提交于 2019-11-26 16:28:29
问题 I am trying to read all data present in the buffer of the Machine connected through TCP/IP but i don't know why i am not getting all data ,some data is getting Missed. Here is the code that i am using .. using (NetworkStream stream = client.GetStream()) { byte[] data = new byte[1024]; int numBytesRead = stream.Read(data, 0, data.Length); if (numBytesRead > 0) { string str= Encoding.ASCII.GetString(data, 0, numBytesRead); } } Please tell me what i am missing to get all the data from the

find all ip address in a network

由 孤者浪人 提交于 2019-11-26 14:23:42
问题 I am trying to do this C#. I need to find all ip address that are active in my network and show them in a list. I can ping all available (1...255) ip address in a network. But I want to make this process faster. 回答1: This code scans my network 255 D-class segments in about 1 sec. I wrote it in VB.net and translated it to C# (apologies if there are any errors). Paste it into a Console project and run. Modify as needed. Note: The code is not production ready and need improvements on especially

Why is network-byte-order defined to be big-endian? [closed]

由 耗尽温柔 提交于 2019-11-26 10:24:21
问题 As written in the heading, my question is, why does TCP/IP use big endian encoding when transmitting data and not the alternative little-endian scheme? 回答1: RFC1700 stated it must be so . (and defined network byte order as big-endian). The convention in the documentation of Internet Protocols is to express numbers in decimal and to picture data in "big-endian" order [COHEN]. That is, fields are described left to right, with the most significant octet on the left and the least significant

How can I make a browser to browser (peer to peer) connection? [closed]

由 两盒软妹~` 提交于 2019-11-26 10:03:50
How can I write a website using HTML5 , CSS and JavaScript on client side that will allow direct tcp/ip connection between the client browsers once the page is loaded . I need to do this to to reduce latency since the site will require that the input from one of the users to be transmitted to the other user as soon as possible so sending data from client A to Server and then to client B is not a good option. I read previous posts on this subject but there were no working solution/examples available that I could find. From what i read the direct connection between clients can be made using
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