socket programming
 

i have to write a simple proxy program like A<->B<->C<->...where a and c are my main client and server process and b sits in between them....my job is to create a proxy server(B) which can send and receive very simple data like char string to and from A to C.i have completed my half of communication i.e. A<->B.now how can i communicate B<->C.both b and c are tcp servers.please help me.my language is C on fedora 15.

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In socket programming, whenever you create TCP connection it always has source ip address & port and destination ip address & port.
In B, you can use source / destination ip & port to send data from A to C and its reply from C to A.

Hint :
Create TCP connection from A to B and from B to C and keep it alive.
Then your socket program in B waiting data from A & C. If data comes from A, send it to C then wait for data reply. When data reply appear/comes C from send it to A.


Read more about socket programming. :newbie: