Romanian railways application

You can find the romanian version of this document here.

video_ro_comp.mp4

Connect

To establish connection with my server make sure to:

install openvpn3
start a session using this vpn key (openvpn3 session-start --config docs/vpnkey.ovpn)
send a mail at [email protected] for the credentials asked at the previous step
compile and run the client application with the following arguments: '10.100.0.30' and '2970'

Main files

Technologies

C - socket(), bind(), connect(), pthread_t
C++ - std::mt1337
libxml2 - official page

Features

The communication protocol

Please consult some definitions from here

[id_train, time_departure, time_arrival, status] routes(location_departure, location_arrival);
[id_train, time_departure, location_arrival] departures(location_departure);
[id_train, time_arrival, location_departure] arrivals(location_arrival);
bool report(id_train, minutes);
bool quit();

Speed

prethreaded execution
create thread for each client
i/o multiplexing with non-blocking calls

Correctness

client uses tcp to server when sending data
client uses udp to server when sending queries
server uses tcp to client when sending data

Security

specific procedures for possible errors
solutions if one party stops responding
test driven-development

Limitations

only 1024 users can be connected at once
not Windows portable