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Diagrammatically, the sequence of calls has the following shape:
Server Client
socket socket <-- Creates server and client ends
| | of the socket connection
v |
bind | <-- Identifies computer's address
| | and socket's number
v |
listen | <-- Listens for client's approach
| | socket connection
*------------------*
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v
*-------------- connect <-- Attempts connection
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v
accept <-- Accepts connection
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*------------------*
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v v
fdopen fdopen <-- Creates pointer variables for
reading and/or writing