tcp

问题 I am using the example from the Matlab R2019A documentation about TCP/IP connection to send data back and forth two Matlab instances over TCP. https://www.mathworks.com/help/instrument/communicate-using-tcpip-server-sockets.html I have a TCP client (client.m) file written as: data = sin(1:64); plot(data); t = tcpip('localhost', 30000, 'NetworkRole', 'client'); fopen(t) fwrite(t, data) and a TCP server (server.m) file written as: t = tcpip('0.0.0.0', 30000, 'NetworkRole', 'server'); fopen(t);

问题 I want to create a simple Tcp Communication project but I get some problems and I dont know how to solve that problem. When I try to find solution all people tell add this code (QT += network)on .pro file but in ui projects I dont have any pro file so I dont know the find the solution. //commu.h #ifndef COMMU_H #define COMMU_H #include <QtWidgets/QMainWindow> #include "ui_commu.h" #include <QtNetwork/QTcpSocket> #include <QObject> #include <QString> class commu : public QMainWindow { Q_OBJECT

问题 I have two hazelcast configure yaml files: hazelcast-cluster1.yml: hazelcast: cluster-name: cluster1 network: join: multicast: enabled:false tip-ip: enabled: true member-list: machineA machineB hazelcast-cluster2.yml: hazelcast: cluster-name: cluster2 network: join: multicast: enabled:false tip-ip: enabled: true member-list: machineC machineD What I wanted is machineA and machineB forms a cluster while machineC and machineD does a separate cluster. However, when I started machineC, it forms a

问题 I have two hazelcast configure yaml files: hazelcast-cluster1.yml: hazelcast: cluster-name: cluster1 network: join: multicast: enabled:false tip-ip: enabled: true member-list: machineA machineB hazelcast-cluster2.yml: hazelcast: cluster-name: cluster2 network: join: multicast: enabled:false tip-ip: enabled: true member-list: machineC machineD What I wanted is machineA and machineB forms a cluster while machineC and machineD does a separate cluster. However, when I started machineC, it forms a

问题 According to the manpage, TCP_CORK prevents sending partials, unsetting it flushes partials. Having TCP_CORK set and setting TCP_NODELAY also flushes partial data. Sounds similar, where exactly lies the difference? On a connection that has TCP_CORK set: Is it correct, that TCP_NODELAY flushes at most a single partial packet and afterwards goes back to the TCP_CORK behaviour? (so it's more of an event, than a permanent option!?) (Man page explicitly mentions All queued partial frames are sent

问题 What I am trying to achieve is binding an IPv6 socket to any address of just one particular device , not system-wide. My intuition is that I could setsockopt() with SO_BINDTODEVICE followed by a bind to :: . It mostly does what I expect it to do. The behaviour is the same in v4. The sockets bound to an interface with SO_BINDTODEVICE will only accept connections made to addresses on that interface. That much is expected. However, I run into errno "Address already in use", if I'm trying to bind

问题 I've been writing small specific purpose HTTP servers for some applications of mine, and I noticed that, if you write() before you read() all available data, the bytes are not sent properly. For example, after read() ing only the request line ( GET / HTTP/1.1\r\n ) sent by my browser, I write() : HTTP/1.1 200 OK\r\n Connection: close\r\r Content-Type: text/html\r\n \r\n (some HTML stuff) Wireshark capture of this write() : '\n' bytes and Content-Type header are gone! (Wireshark always

问题 When reading TCP source code, I find a confused thing: I know TCP has two queues in 3 way handshake: The first queue stores connections which server has received the SYN and send back ACK + SYN , which we call as syn queue . The second queue stores the connections that 3WHS are successful and connection established, which we call as accept queue . But when reading codes, I find listen() will call inet_csk_listen_start() , which will call reqsk_queue_alloc() to create icsk_accept_queue . And

问题 I'm trying to open server socket using python the code that I'm using wait for connection and pause the loop until the next connection achieved when its trying to execute this line >> connection, client_address = sock.accept() but I don't need to pause the loop Is there any method to make the code skip this line and continue the loop if there is no connection code : Server import socket import sys # Create a TCP/IP socket sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) # Bind the

问题 I've been working on a small pure C client application (my first :/) which uses TCP socket for communication with the server. The Server sends me a packet (C structure) in which the first byte contains the size of the packet. The problem is that server is using unsigned char to represent the size of the packet because char is signed (from -128 to +127) and +127 is not enough to represent size that can be up to 255 in some packets. => I need a unsigned char buffer; In Linux, the second