udp -> basic chat tcp -> file transfer
UDP server on port 8192 TCP server on port 8192 (to listen for incoming client connections and adds them to its list of clients) TCP server on port 5717 (exclusively for opening sockets just for file transfer)
User names and passwords are stored in a MySQL database Messages sent are also stored in MySQL
New SERVER THREAD started: Server started on PORT 8192, Datagram Socket created on this port ... MANAGE, RECV AND SEND in 3 separate threads running inside the SERVRRUN THREAD
Client sign up -> Stored in MYSQL database running on 3306 TCP Client Log in -> Enter name, pw, IP of server , PORT of server (access MYSQL db to authenticate user) On connection , Client is bound to a datagram socket with random port number + IP of host a connection packet is sent to the SERVER Server recvs this conn packet, assigns ID to user, stores it in list of clients And sends a confirmation msg back to the client along with its ID
Message -> SERVER (logs message in MYSQL db) -> Broadcast to all clients (including the one who sent it, so its like a confirmation to the sender that the packet was sent as well)
Client can VIEW number of online users Client can VIEW message log (with date and time) by asking the MYSQL server
DISCONNECT (normal vs abnormal) -> send a disconnect packet to the server. it removes the client from its list + client socket (protected by a lock) is closed in a thread + tells all users that the user has left
manager thread:-
Updates number of online users on client app evry 2 seconds NOT CLEAN DISCONNECT -> pings clients and gets responses... if doesnt get a response after a total of 5 ATTEMPTS. it drops the client... thread sleeps for 2 secs so its like a total of around 10 seconds
SERVER COMMANDS: -> servr can send message to all + /clients to get list of all connectd clienst -> /quit (remove all clients closes socket of srver as well) -> /kick KICK CLIENTS based on id
-> file transfer as soon as done socket is closed -> users choose the directory to save files to
to be implemented (or not? ) ***BAN USER FOR SPECIFIC TIME (admin user?) ***Show names of all online + of all offline
https://www.youtube.com/watch?v=KRhv4iPgzHE&t=1s https://dev.mysql.com/downloads/connector/j/