Can You Hear Me Now

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Compile and run

cd "<REPO_PATH>/can_you_hear_me_now"
base='do_you_see_what_i_see' && g++ -std=c++14 "${base}.cpp" -o "${base}.out" && "./${base}.out"

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Note 1

When adapting code to send and receive datagrams in udp/ip, we must not use listen() and accept() functions as we no longer are relying on an established connection. Alongside that, we now use sendto() and recvfrom() instead of send() and recv(). Since udp is not reliable for delivery or error checking. We can remedy most of this by using methods like Retransmission, flow control, congestion control, and buffering.

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Note 2

To adapt the code to handle multiple TCP/IP clients without threads in C++ using only the standard library, we can use the select() function to manage multiple connections in a single thread.

In this implementation, we use the select() function to monitor multiple file descriptors (sockets) for input or output readiness. We can use FD_SET to add the server socket to the file descriptor set, and we add new client sockets to the set when they connect. When there is client events/activity, select() waits for this and processes it.