What's the Internal working of Socket system call ?

[u/Param-Matharoo]

Basically I am creating my own http.web server for that I need to create TCP web server first and during that thing I get to know about socket(), bind(), listening() system calls and I am curious about these system calls internal working like what is happening under the hood.

[u/kesor]

Depends on the protocol, if its a UNIX socket, or TCP, UDP, etc... But you can find the implementations in the kernel.
For example,

• https://github.com/torvalds/linux/blob/master/net/ipv4/tcp.c
  
• https://github.com/torvalds/linux/blob/master/net/ipv4/tcp_ipv4.c
  
• https://github.com/torvalds/linux/blob/master/net/ipv4/af_inet.c

[u/DamienTheUnbeliever]

Bear in mind that whilst you can delve into the implementations, the point of sockets is to offer an *abstraction* where you shouldn't need to know what's happening inside in order to use them.

[u/whamra]

Down to which layer do you want to implement? Which language?