Server/Client using socket programming

Question

Let's say I have a server socket listening on port no 5010. When client tries to connect to this server socket using connect() API, server accepts socket connection in accept() API.

accept() API returns a new socket for server/client connection. Now all data transfer between server and client is done using this newly created socket. Does the data transfer happens on same port 5010. If not, how the ports are chosen when new socket is returned as a result of accept() API ?

David Schmitt · Accepted Answer · 2010-01-18 17:22:32Z

1

The connection between the server and the client socket is identified by the tuple (serverAddress, serverPort, clientAddress, clientPort). The server address and server port always stay the same (obviously). The client allocates a (semi-)random "source" port to avoid collisions even if re-using the same address (e.g. when there are multiple clients on the same machine).

answered Jan 18, 2010 at 17:22

David Schmitt

59.5k27 gold badges124 silver badges165 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

cppdev Over a year ago

Does it mean that if there are five clients connected to the server, each client is sending data to port 5010 only. How a server can differentiate from which client data is coming ?

Nikolai Fetissov Over a year ago

By the second part of that tuple (client ip, client port).

Collectives™ on Stack Overflow

Server/Client using socket programming

1 Answer 1

2 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

2 Comments

Your Answer

Sign up or log in

Post as a guest

Related