The thing is that pdp_ip0 is one of interfaces, all pdpXXX are WWAN interfaces dedicated to different functions, voicemail, general networking interface. I read in Apple forum that : The OS does not keep network statistics on a process-by-process basis. As such, there’s no exact solution to this problem. You can, however, get network statistics … Read more
This is the implementation coming from the Apache camel project: /** * Checks to see if a specific port is available. * * @param port the port to check for availability */ public static boolean available(int port) { if (port < MIN_PORT_NUMBER || port > MAX_PORT_NUMBER) { throw new IllegalArgumentException(“Invalid start port: ” + port); … Read more
POSIX defines send/recv as atomic operations, so assuming you’re talking about POSIX send/recv then yes, you can call them simultaneously from multiple threads and things will work. This doesn’t necessarily mean that they’ll be executed in parallel — in the case of multiple sends, the second will likely block until the first completes. You probably … Read more
Your confusion lies in thinking that a socket is identified by Server IP : Server Port. When in actuality, sockets are uniquely identified by a quartet of information: Client IP : Client Port and Server IP : Server Port So while the Server IP and Server Port are constant in all accepted connections, the client … Read more
As for your problem, currently you will have to depend on XHR or websockets for this. Currently no popular browser has implemented any such raw sockets api for javascript that lets you create and access raw sockets, but a draft for the implementation of raw sockets api in JavaScript is under-way. Have a look at … Read more
The javadoc for SocketException states that it is Thrown to indicate that there is an error in the underlying protocol such as a TCP error In your case it seems that the connection has been closed by the server end of the connection. This could be an issue with the request you are sending or … Read more
There could be many reasons, but the most common are: The port is not open on the destination machine. The port is open on the destination machine, but its backlog of pending connections is full. A firewall between the client and server is blocking access (also check local firewalls). After checking for firewalls and that … Read more
Yes, local interprocess communication by unix domain sockets should be faster than communication by loopback localhost connections because you have less TCP overhead, see here.
Simple Server-Side Fix ❗ DO NOT USE “socketio” package… use “socket.io” instead. “socketio” is out of date. Some users seem to be using the wrong package. ❗ SECURITY WARNING: Setting origin * opens up the ability for phishing sites to imitate the look and feel of your site and then have it work just the … Read more
Calling close and shutdown have two different effects on the underlying socket. The first thing to point out is that the socket is a resource in the underlying OS and multiple processes can have a handle for the same underlying socket. When you call close it decrements the handle count by one and if the … Read more