Created UDP and TCP sockets and initiated data transfer using C programming language. Updated the database with book titles, queried by the user and acquired the description of the Respective books ...

All Linux distributions provide a wide range of network applications—from dæmons that provide a variety of services such as WWW, mail and SSH to client programs that access one or more of these ...

You're using blocking sockets, so read will not terminate until the connection is closed from the other end, or until 128 octets are read. I suppose the other side is sending data less than 128 octets ...