Based on your question: My question is, using the code below, how would you be able to have multiple clients connected? I’ve tried lists, but I just can’t figure out the format for that. How can this be accomplished where multiple clients are connected at once and I am able to send a message to … Read more
Explanation: This problem occurs because Chrome allows up to 6 open connections by default. So if you’re streaming multiple media files simultaneously from 6 <video> or <audio> tags, the 7th connection (for example, an image) will just hang, until one of the sockets opens up. Usually, an open connection will close after 5 minutes of … Read more
It looks like what you are looking for is an graceful shutdown. First your code does not work because you are closing socket immediately after calling shutdown. The rule is that in a graceful shutdown, both sides must be aware of the shutting down and have acknowledged it before any actually closes the socket. I … Read more
The connection should remain open regardless but yes it’s often common to see protocols implement a heartbeat in order to help detect dead connections, IRC with the PING command for example.
When you send bytes from a buffer with a normal TCP socket, the send function returns the number of bytes of the buffer that were sent. If it is a non-blocking socket or a non-blocking send then the number of bytes sent may be less than the size of the buffer. If it is a … Read more
To answer your questions. Even though they achieve (in general) similar things, yes, they are really different. WebSockets typically run from browsers connecting to Application Server over a protocol similar to HTTP that runs over TCP/IP. So they are primarily for Web Applications that require a permanent connection to its server. On the other hand, … Read more
Nikolai, using a separate socket and bind(2) for each address or messing with routing tables is often not a feasible option e.g. with dynamic addresses. A single IP_ADDRANY-bound UDP server should be able to appear to respond on the same dynamically-assigned IP address a packet is received on. Luckily, there is another way. Depending on … Read more
To bind a UDP socket when receiving multicast means to specify an address and port from which to receive data (NOT a local interface, as is the case for TCP acceptor bind). The address specified in this case has a filtering role, i.e. the socket will only receive datagrams sent to that multicast address & … Read more
You can share a socket between two (or more) processes in Linux and even Windows. Under Linux (Or POSIX type OS), using fork() will cause the forked child to have copies of all the parent’s file descriptors. Any that it does not close will continue to be shared, and (for example with a TCP listening … Read more
Well, the most likely difference is that you still have to do an actual lookup of localhost somewhere. If you use 127.0.0.1, then (intelligent) software will just turn that directly into an IP address and use it. Some implementations of gethostbyname will detect the dotted format (and presumably the equivalent IPv6 format) and not do … Read more