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Yes, sharing a socket between two processes *IS* possible. You need to use a “Unix domain socket” to pass the descriptor from the process that opened the socket to the process that you want to share it. You’ll also need some mechanism for synchronizing the two processes.
What is binding in socket programming?
When a socket has both an IP address and a port number it is said to be ‘bound to a port’, or ‘bound to an address’. A bound socket can receive data because it has a complete address. The process of allocating a port number to a socket is called ‘binding’.
How to close address already in use?
Anyway you can stop the process which uses your port and let your application take it.
- Use netstat -a -o -n to check for the port usages.
- Use taskkill /F /PID to kill that process.
What is socket reuse?
The SO_REUSEADDR socket option allows a socket to forcibly bind to a port in use by another socket. For example, if all of the sockets on the same port provide TCP service, any incoming TCP connection requests over the port cannot be guaranteed to be handled by the correct socket — the behavior is non-deterministic.
Why do we bind in socket programming?
After creation of the socket, bind function binds the socket to the address and port number specified in addr(custom data structure). In the example code, we bind the server to the localhost, hence we use INADDR_ANY to specify the IP address. Listen: int listen(int sockfd, int backlog);
What is socket reuse address?
Well, with address reuse, you can bind two sockets of the same protocol to the same source address and port. That means three of those five values are already the same for these two sockets.
What is So_linger socket option?
SO_LINGER Socket Option This option specifies how the close function operates for a connection-oriented protocol (for TCP, but not for UDP). By default, close returns immediately, but if there is any data still remaining in the socket send buffer, the system will try to deliver the data to the peer.
Is there a way to share a socket between two processes?
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.
Is there a way for multiple processes to bind?
In answer to the OP’s original question, no, multiple processes cannot bind (); just the original parent process would call bind (), listen () etc, the child processes would just process requests by accept (), send (), recv () etc. Most others have provided the technical reasons why this works.
How is a listening socket used in socket programming?
In socket programming, you create a listening socket and then for each client that connects, you get a normal stream socket that you can use to handle the client’s request. The OS manages the queue of incoming connections behind the scenes.