I need help with tranmitting content of buffer across connected socket.

The reason can be that you haven't checked out the documentation of these two functions and you probably don't check their return value: send()[^], recv()[^]. Always check the return value for errors, and never assume that they sent the whole buffer. If they sent/received only part of the data then increase the pointer into your buffer and issue another send() or recv() call to send/receive the remaining data.