Unix Socket Programming Question: Download Questions PDF
What is with the second parameter in bind()?
Answer:
The man page shows it as "struct sockaddr *my_addr". The sockaddr struct though is just a place holder for the structure it really wants. You have to pass different structures depending on what kind of socket you have. For an AF_INET socket, you need the sockaddr_in structure. It has three fields of interest:
sin_family
Set this to AF_INET.
sin_port
The network byte-ordered 16 bit port number
sin_addr
The host's ip number.
This is a struct in_addr,
which contains only one field,
s_addr which is a u_long.
sin_family
Set this to AF_INET.
sin_port
The network byte-ordered 16 bit port number
sin_addr
The host's ip number.
This is a struct in_addr,
which contains only one field,
s_addr which is a u_long.
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