How to open a raw socket for sending from specific TCP port? I want to have all my connections always go from a range of ports below ephemerals.
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How to open a raw socket for sending from specific TCP port? I want to have all my connections always go from a range of ports below ephemerals.
If you are using raw sockets, then just fill in the correct TCP source port in the packet header.
If, instead, you are using the TCP socket interface (
socket(),connect()and friends), then you can set the source port by calling thebind()system call for the client socket – exactly as you would to set the listening port for the server socket.