CIS620 - TCP & UDP Socket in C - Computer Science Assignment Help

Assignment Task

The purpose of this project is to familiarize yourself with the TCP/UDP socket in C and the advanced UNIX file operations such as lseek, lockf, etc. You are asked to write a client-server program in which the client can contact the db server to access a database.

You also need to write a service-map program which resides at a well-known UDP socket. Each group should should use a five-digit number which is a ”2” followed by the last four digits of your student id.

The service-map server accepts registration from the db server and advertises socket addresses to the prospective client. When a database server starts, it first requests a local TCP port. Then, it broadcasts a registration message in UDP. For example,

The service-mapper will receive this message, store the service name BANK620 along with the IP address and port number of the db server in its table, and reply an ASCII string ”OK” to the db server. When a client starts, it broadcasts a request message:

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