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operating system kernels
Trends
- 1Port 0: the port the kernel picks for you●The port that does not exist Ask any program to listen on port 0 and it will hand you a socket on port 47193...or 58037.
Programmers are discussing the odd convention of port 0 in networking. When software asks the operating system to listen on port 0, the kernel does not bind that port — instead it assigns an arbitrary free ephemeral port, such as 47193 or 58037. Port 0 is reserved as a signal meaning 'choose one for me'. The explanation has struck readers as a neat piece of hidden computing trivia.
Repos
- torvalds/linux Linux kernel source tree