sockets

问题 I'm trying to work with the Managed Media Aggregation C# library (http://net7mma.codeplex.com) to handle a RTSP/RTP stream from a Freebox Set top box. Although the lib works fine with the sample RTSP feed, when working with the feed from my set top box, the RTP listener socket (a simple UDP socket listening every income on a specific port) throws a SocketException : ConnectionReset, and of course no data shows while Receiving (The data shows in Wireshark). Suppressing E_CONNRESET via the

问题 Do reserved TCP/IP ports require that a program is running and bound to the port? If no such program is running or exists, can another program use this port? For example, on Linux, port 7 is reserved for an echo server. I assume there is some program running and is bound to port 7 of the machine. The program basically echos back input. If this program is stopped, will port 7 be released? If I wrote my own echo server and bound it to some other port, wouldn't this port be released once my

问题 Do reserved TCP/IP ports require that a program is running and bound to the port? If no such program is running or exists, can another program use this port? For example, on Linux, port 7 is reserved for an echo server. I assume there is some program running and is bound to port 7 of the machine. The program basically echos back input. If this program is stopped, will port 7 be released? If I wrote my own echo server and bound it to some other port, wouldn't this port be released once my

问题 Do reserved TCP/IP ports require that a program is running and bound to the port? If no such program is running or exists, can another program use this port? For example, on Linux, port 7 is reserved for an echo server. I assume there is some program running and is bound to port 7 of the machine. The program basically echos back input. If this program is stopped, will port 7 be released? If I wrote my own echo server and bound it to some other port, wouldn't this port be released once my

问题 I've been trying to debug this for a couple of days now, I've had experience with sockets on 1 other app but it was on the same domain, I didn't think I'd have this much trouble with a cross domain vue.js app though I have been debugging this myself to my best efforts and have tried basically everything I can think of. In the node.js server I have set origins with let io = require('socket.io')(http, {origins: '*:* agora.dev:*'}) and then I listen for connections with io.on('connection',

问题 I do not know why I am receiving the following error. Can anyone shed some light on this? System.Net.Sockets.SocketeException: An invalid argument was supplied Error Code:10022 [closed] private void btnStart_Click(object sender, EventArgs e) { try { epLocal = new IPEndPoint(IPAddress.Parse(txtIP1.Text), Convert.ToInt32(txtPort1.Text)); sck.Bind(epLocal); epRemote = new IPEndPoint(IPAddress.Parse(txtIP2.Text), Convert.ToInt32(txtPort2.Text)); //Here Error Occures I dont know what is my mistake

问题 I do not know why I am receiving the following error. Can anyone shed some light on this? System.Net.Sockets.SocketeException: An invalid argument was supplied Error Code:10022 [closed] private void btnStart_Click(object sender, EventArgs e) { try { epLocal = new IPEndPoint(IPAddress.Parse(txtIP1.Text), Convert.ToInt32(txtPort1.Text)); sck.Bind(epLocal); epRemote = new IPEndPoint(IPAddress.Parse(txtIP2.Text), Convert.ToInt32(txtPort2.Text)); //Here Error Occures I dont know what is my mistake

问题 What are .sock files? How can I communicate with a .sock file? Elaborating on the 2nd bullet, I understand that .sock files are for Inter-process communication. How can I 'communicate' with them? Let us say a sock file is designed to respond in a specific way (For ex: it takes the input 'time' and prints out the current time). I prefer higher level programming languages (python) more than C/C++ . It'd also be better if someone can point me to some application (like nc maybe?) that I can use

问题 What are .sock files? How can I communicate with a .sock file? Elaborating on the 2nd bullet, I understand that .sock files are for Inter-process communication. How can I 'communicate' with them? Let us say a sock file is designed to respond in a specific way (For ex: it takes the input 'time' and prints out the current time). I prefer higher level programming languages (python) more than C/C++ . It'd also be better if someone can point me to some application (like nc maybe?) that I can use

问题 A simple experiment in python (on Windows) shows that I am able to bind to the same port on both the wildcard address and a specific address simultaneously: import socket import select MY_PORT = 13337 sany = socket.socket() sany.bind(('', MY_PORT)) sany.listen(0) sloc = socket.socket() sloc.bind(('127.0.0.1', MY_PORT)) sloc.listen(0) socks = [sany, sloc] ready, _, _ = select.select(socks, [], []) print socks.index(ready[0]) Conceptually, they overlap in what they're supposed to cover.